Technical field
[0001]
　The present invention relates to a mold for continuous casting to produce a are allowed to cast strip solidified while cooling molten steel.
Background technique
[0002]
　Continuous casting mold is a mold formed by using a copper plate. Continuous casting mold, the space corresponding to the thickness and width of the slab to be cast is formed by the copper plate, the space penetrates in the vertical direction. Further, in order to solidify the molten steel is poured into the mold is cooled, the outer surface of the copper plate (cooling surface) side is cooled. Such poured been molten steel from above into the mold of the continuous casting mold is cooled, gradually pulled downward while solidifying from a portion in contact with the inner surface of the copper plate (molten steel surface).
[0003]
　Cooling of the mold is carried out outside surface of the copper plate by water cooling. For example, as shown in FIG. 19, the outer surface of the copper plate 2 constituting the mold (cooling surface) 2b are numerous water guide groove 2c is formed. On the other hand, the outer surface 2b of the copper plate 2 is to suppress deformation of the copper plate 2 due to thermal stress generated in the copper plate 2 and the copper lid called back plate 4 is a strength member for keeping the mold in dimensions , it is fixed by a bolt 8 at a plurality of locations. Thereby, the opening portion of the water guide groove 2c is covered with the back plate 4, spillway which cooling water flows is formed.
[0004]
　Further, the copper plate 2, while avoiding a water guide groove 2c, from the back plate 4 side, holes 2d formed to the copper plate 2 through the back plate 4 is formed. The hole 2d, the temperature detector 6 for detecting the mold temperature is inserted. As the temperature detector 6, conventionally, a sheath thermocouple is used. Detection result of the temperature detector 6 is provided to monitor the template in circumstances, for example, used for the detection of troubles such as breakout is solidified portion of the outer surface of the molten steel shell leaks molten steel tear. Further, the temperature distribution generated in the copper plate 2 is said to reflect the like molten steel flow in the mold, in that by monitoring the quality determination of the quality of the slab, the detection result of the temperature detector 6 is used ing.
[0005]
　Temperature detection unit 6, as shown in FIG. 19, is inserted from the back plate 4 side to the hole 2d, it is installed by fixing the fixing portion 6a to the back plate 4. Fixing portion 6a is, for example, a screw member, by screwing the screw groove formed in the vicinity of the opening of the back plate 4 holes 2d, it is possible to fix the temperature detection unit 6 to the back plate 4. At this time, the temperature detector 6, in the thickness direction of the copper plate 2, ensure thermocouple tip the temperature detection point is disposed so as to be located molten steel surface 2a side than the tip of the water conducting grooves 2c (bottom of the groove) that. In between the tip and the molten steel surface 2a of the water guide grooves 2c, since the temperature gradient which is substantially linear approximation and the temperature of the cooling water temperature and the molten steel surface 2a is formed, between the tip and the molten steel surface 2a of the water conducting grooves 2c by arranging the temperature detection points of the temperature detecting unit 6, it is possible to estimate the temperature of the molten steel surface 2a.
CITATION
Patent Literature
[0006]
Patent Document 1: JP 2008-260046 JP
Summary of the Invention
Problems that the Invention is to Solve
[0007]
　However, the case of arranging the temperature detection unit 6, as shown in FIG. 19, in the copper plate 2, the holes 2d and water guide groove 2c of the temperature detector 6 is inserted is formed adjacent. Thus, through a gap between one side surface 4a of the back plate 4 facing the cooling surface 2b and this copper plate 2, the cooling water flowing through the water guide grooves 2c enters the hole 2d, the temperature detected by the temperature detector 6 there is a possibility that the inhibition.
Also, when trying to increase significantly the temperature detection point to an existing template, the number of holes 2d increases, the probability of water entering increases the hole 2d, problems due to such reduction in the strength of the back plate 4 (water there penetration and heat distortion deformation increase in copper) also concerns the like. Further, the spacing between adjacent water guide groove 2c may better portion temperature detector 6 is installed between the water guide groove 2c is wider than the portion where the temperature detecting unit 6 is not installed. Therefore, when installing a temperature detector 6 to form a new hole 2d between water guide groove 2c to an existing template, the average value of the spacing of the water guide groove 2c is increased, the cooling efficiency may be decreased . The temperature detector 6, during maintenance of the mold is also a consumable is replaced with a new one, it may not be possible to easily increase the number.
[0008]
　As the thermocouple used as a temperature detecting unit 6, from the viewpoint of durability and electromagnetic noise suppression, ungrounded sheathed thermocouple having an outer diameter of 3.2mm is used. The thermocouple, about 10% of the outer diameter (i.e., about 0.3 mm) metal account for more than (e.g., stainless steel) thickness and the sheath, strands having about 15% or more of the diameter of the outer diameter (Ni , an alloy of Cr), heat capacity, such as an electrical insulating material occupying therebetween, such as by variations in responsiveness due to such variations in the thermal contact resistance between the sheath outer surface and the copper plate hole inner surface, is a fear that does not reflect accurately the temperature of the hole bottom is there.
[0009]
　On the other hand, in recent years, along with the need for multiple point measurement of the mold temperature, it tends to increase the temperature detection point of a temperature detector 6. Therefore, temperature measurement and using a plurality of thermocouples are readily installed than thermocouples, high precision and stable fiber Bragg grating for realizing the multiple point measurement (Fiber Bragg Grating, hereinafter, " the FBG. ") temperature using a sensor
measurement is employed. FBG sensor is a one of the optical fiber sensor, stacked plurality of layers of different refractive index in the core portion of the optical fiber to form a grid, reflecting only light with a wavelength specified by the lattice spacing refractive index or transmission It has a structure to be. Change in refractive index due to temperature of the FBG and strain (i.e., expansion and contraction), the grating period of the FBG changes, the wavelength reflected changes. Thus, type white light (light having a spectrum spread smoothly over a wide wavelength range) to the FBG sensor, by detecting the wavelength of the reflected light by the spectroscope, it is possible to determine the temperature at the location of the FBG.
[0010]
　In such a FBG sensor, since it is possible to determine the temperature detection points by the detection wavelength range and temperature range, etc., to be positioned relative to one optical fiber, for example, the temperature detection point of a few ten-point at an arbitrary position can. In this case, it is possible to the spacing of the temperature detection point of about 10 mm, is excellent in spatial resolution. Also, there is therefore utilizes light transmitted through the optical fiber signal transmission, an advantage that is not affected by electrical noise such as an electromagnetic brake.
[0011]
　However, the FBG sensor is, for example, as disclosed in Patent Document 1, it is common is fixedly installed inside the copper plate, it is difficult to easily attach and detach the FBG sensor with respect to the copper plate. When installed by fixing the FBG sensor to a copper plate, the FBG sensor for each replacement of the copper plate also becomes possible to waste containers could not be used repeatedly.
[0012]
　The present invention has been made in view of the above problems, it is an object of the present invention, the temperature of the copper plate can be detected with high accuracy, and easily detachable temperature detector with respect to the copper plate It comprises, to provide a new and improved continuous casting mold.
Means for Solving the Problems
[0013]
　In order to solve the above problems, according to an aspect of the present invention, the mold body of the mold for continuous casting, is inserted into the insertion hole formed in the mold body, a temperature detector for detecting the temperature inside the mold, the provided, the temperature detection unit includes a FBG (fiber Bragg grating) sensor that is inserted into the protective tube can be radially deformed, is formed with a groove along the longitudinal direction, along the FBG sensor in the longitudinal direction a support member for supporting Te made sandwich at a temperature detection point, the tension member which is stretched over the opening portion of the groove in the support member, by the inner surface of the insertion hole, a protective tube FBG sensor is inserted, continuous casting mold is provided.
[0014]
　Further, the mold body of the mold for continuous casting, is inserted into the insertion hole formed in the mold body, comprising a temperature detecting unit for detecting the temperature inside the mold, the temperature detection section, deformable protection radially two FBG sensors inserted respectively into the tube, and the support member has two grooves diametrically opposed are formed in the longitudinal direction, for supporting the two FBG sensors along a longitudinal direction, composed, in the temperature detection point, the tension member which is stretched two grooves each aperture in the support member, by the inner surface of the insertion hole, FBG sensor sandwich each protective tube which is inserted, mold provides for continuous casting It is.
[0015]
　In the insertion hole, one of the FBG sensor is arranged on the molten steel surface side of the mold body, the other of the FBG sensor may be disposed on the cooling surface of the mold body.
[0016]
　Temperature detection unit, the upper mold body may be inserted from at least one of the lower or lateral.
[0017]
　FBG sensors in the insertion hole may be disposed on the thickness direction of the diameter of the mold body.
[0018]
　Further, the protective tube, the inner diameter is at 0.5mm or less, and, even when the deformation in the radial direction, configured as the inner diameter of the protective tube is greater than the outer diameter of the FBG sensor.
[0019]
　Support member in the longitudinal direction, and a small diameter portion which tension member is provided, and a large diameter portion having a larger diameter than the small diameter portion, be provided so that the temperature detection point of the FBG sensor is located in the small diameter portion good.
[0020]
　FBG sensor at the temperature detection point is disposed between the outer and inner surface of the insertion hole of the tension member, the small-diameter portion which does not include the temperature detection points are provided on the inner side of the tension member facing the groove of the inner surface it may be so.
[0021]
　Tension member is, for example, may be used filamentous or film-like heat-resistant fibers.
Effect of the invention
[0022]
　According to the present invention described above, the temperature of the copper plate can be detected with high accuracy, and can provide a continuous casting mold with a readily removable temperature detector with respect to the copper plate.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023]
FIG. 1 is a schematic perspective view showing a schematic configuration of a continuous casting mold according to the first embodiment of the present invention.
FIG. 2 is a schematic perspective view showing a short side of the copper plate of a continuous casting mold according to the embodiment.
3 is a schematic perspective view showing a partition plate of a continuous casting mold according to the embodiment.
[Figure 4] a temperature detecting unit according to the installed the embodiment into the insertion hole of the continuous casting mold copper plate, which is a schematic sectional view showing a state of a temperature detection point.
5 is a schematic side view showing an outline of a support member according to the embodiment.
[6] A partially enlarged view of a region I of the support member shown in FIG. 5, upper diagram shows a state seen from the right side of FIG. 4, below shows a state seen from the left side of FIG. 4.
7 is a schematic explanatory diagram for explaining the principle of the FBG sensor.
It is a graph showing the response of the FBG sensor when [8] were varied diameter of the protective tube.
It is a cross-sectional view in FIG. 9] D-D cutting line of Figure 6.
It is a sectional view taken along the E-E cutting line of FIG. 10 FIG.
[11] a sectional view taken along the Es-Es cutting line in FIG. 6, the left view shows a state before insertion into the insertion hole, the right figure shows the state after insertion into the insertion hole.
Is a schematic cross-sectional view showing FIG. 12 of the temperature detecting unit according to the second embodiment to the embodiment installed in the copper plate of the insertion hole of the continuous casting mold according to an embodiment of the present invention, the state of the temperature detection point .
[Figure 13] A partial enlarged view of the support member, the upper diagram shows a state seen from the right side of FIG. 12, middle panel shows a state seen from the upper side of FIG. 12, below the plane of FIG. 12 It shows a state seen from the left side.
14 is a sectional view along D-D cutting line of Figure 13.
It is a sectional view taken along the E-E cutting line of FIG. 15 FIG. 13.
[Figure 16] A sectional view of Es-Es cutting line in FIG. 13, the left view shows a state before insertion into the insertion hole, the right figure shows the state after insertion into the insertion hole.
17 is a schematic perspective view showing an outline of the experimental equipment in Example.
[18] the temperature detection unit after the heating block is turned, is a graph showing the output of the thermocouple and thermocouple of the inner case of the two.
[Figure 19] is conventional, is an explanatory diagram for explaining a method of measuring temperature of the copper plate using a thermocouple.
DESCRIPTION OF THE INVENTION
[0024]
　Reference will now be described in detail preferred embodiments of the present invention. In the specification and the drawings, components having substantially the same function and structure are a repeated explanation thereof by referring to the figures.
[0025]
　<1. First
　Embodiment> [1-1. A schematic configuration of a continuous casting mold]
　First, based on FIGS. 1 to 3, illustrating a schematic configuration of a continuous casting mold according to the first embodiment of the present invention. Incidentally, FIG. 1 is a schematic perspective view showing a schematic configuration of a continuous casting mold 10 according to the present embodiment. Figure 2 is a schematic perspective view showing a copper plate 14A on the short side of the continuous casting mold 10 according to the present embodiment. Figure 3 is a schematic perspective view showing a partition plate 16 of the continuous casting mold 10 according to the present embodiment. In Figure 1, X-direction of the template thickness, the Y-direction mold width, the Z-direction as a template height.
[0026]
　Continuous casting mold 10 (hereinafter, simply referred to as "template".), As shown in FIG. 1, a mold formed by using a copper plate, the long sides of the copper plate 12A, and 12B, the shorter side copper plates 14A , it is formed by combining a 14B. The size of the copper plate 12A, 12B, 14A, 14B is determined by the thickness, width of the slab to be produced. For example, when producing steel for slabs, the long sides of the copper plate 12A, 12B the size of the width (length in the Y-direction) of about several m, the height (length in the Z direction) 1m weak, thickness (length in the X direction) is about 30 ~ 40 mm. Further, the copper plate 14A of the short sides, 14B size of the width (length in the X direction) is 250mm approximately, height (length in the Z-direction) of about 1 m, (length in the Y direction) thickness of 30 ~ 40 mm it is the degree.
[0027]
　The shorter side copper plates 14A, 14B of the side (X direction of the surface) 14c, 14d, as shown in FIG. 1, the long sides of the copper plate 12A, is formed in contact respectively the molten steel surface of 12B. Copper plate 14A of the short sides, 14B long sides of the copper plate 12A, is moved in the Y direction along the molten steel surface in 12B, it is possible to change the mold width. In the following, the copper plate 14A, 14B of the short sides, of the surfaces in the vertical direction (Z direction), to the upper surface of the upper surface 14a, a lower surface and a lower surface 14b. Further, the surface of the width direction (X direction) side surface 14c, and 14d, of the surfaces in the thickness direction (Y direction), and the surface in contact with the molten steel and the molten steel surface 14e, the other surface and the cooling surface 14f. Although shows the copper plates 14A in FIG. 2, a copper plate 14B is similar. However, in the case of the copper plate 14B, the surface of the Y-axis positive direction side next to the molten steel surface 14e, the surface of the Y-axis negative direction side becomes cooling surface 14f.
[0028]
　Continuous casting mold 10 according to this embodiment, as shown in FIG. 1, there is a case where the inside of the mold 10, the copper plate is provided as the intermediate partition plate 16. By providing the partition plate 16, the molten steel is divided into two internal spaces of the mold 10 to be poured, it is possible to produce in parallel two of the slab. In the following, the intermediate partition plate 16, as shown in FIG. 3, among the surfaces of the vertical direction (Z direction), the upper surface and the upper surface 16a, a lower surface and a lower surface 16b, the surface of the width direction (X direction) the sides 16c, and 16d. Further, the intermediate partition plate 16 is different from the long sides and short sides of the copper plate 12A, 12B, 14A, 14B, the molten steel surface 16e that faces in the thickness direction (Y direction) is in contact both with the molten steel, the 16f.
[0029]
　Copper plate 12A constituting the mold 10, 12B, 14A, 14B, and, on the molten steel surface in contact with molten steel inner partition plate 16, plating composed mainly of Ni or the like is applied. Mold 10 penetrates in the vertical direction, the pouring nozzle 20A disposed above the mold 10, the molten steel from 20B is poured, the molten steel is withdrawn from the lower while solidifying. At this time, in order to solidify the molten steel is poured into the mold is cooled, the outer surface of the copper plate (cooling surface) side is cooled. Therefore, poured been molten steel from above into the mold of the mold 10 is cooled, gradually pulled downward while solidifying from a portion in contact with the molten steel surface.
[0030]
　Each repeating such casting, the molten steel surface of the copper plate 12A, 12B, 14A, 14B, the intermediate partition plate 16, shaved, deterioration of the applied plating is eroded on the surface occurs. Therefore, the copper plate 12A, 12B, 14A, 14B, the intermediate partition plate 16, after a certain period of use, detached from the back plate by a continuous casting machine, after being adjusted to a plane cut several mm molten steel surface, plating It is applied. Thereafter, it assembled again backplate and reused.
[0031]
　Here, the continuous casting mold 10 according to this embodiment, the temperature detector 100 for detecting the mold temperature is provided. Based on the detection result of the temperature detector 100, and detect the trouble in the continuous casting, it is possible and monitor the molten steel flow in the mold or the like. In this embodiment, a FBG sensor as a temperature detection unit 100. Detailed structure of the temperature detecting unit 100 will be described later. Temperature detection unit 100 is formed by fixing the FBG sensor to a support member of the rod-shaped, is installed by inserting into a hole formed in the copper plate of the mold 10.
[0032]
　Insertion hole temperature detector 100 is inserted, it is being formed in a position that can be easily detached temperature detecting portion 100 from the copper plate. For example, a copper plate 12A, 12B, 14A, the upper surface and the lower surface of the 14B, the copper plate 12A, it is possible to form the insertion hole on a side surface of 12B. In Figure 1, an insertion hole 12h on the side surface of the copper plate 12B is, the insertion hole 14h on the upper face of the copper plate 14A, 14B, 14h are respectively formed. The temperature detecting unit 100 according to this embodiment can be installed by inserting from the upper surface of the intermediate partition plate 16. Insertion holes formed in these copper plate, inner diameter of pores of about 3 ~ 4 mm, are formed, for example, 150mm or more deep. Therefore, it is possible to construct a mold 10 comprising a temperature detecting unit 100 according to the present embodiment by also small modification relative to existing molds.
[0033]
　Hereinafter, with reference to FIGS. 4 to 11, it will be described in detail configuration of the temperature detector 100 which is used by being inserted into the insertion hole formed in the continuous casting mold 10.
[0034]
　[1-2. Temperature detection unit]
(1) Schematic Configuration
　First, referring to FIG. 4, a schematic configuration of a temperature detector 100. Figure 4 is a schematic sectional view showing a temperature detection unit 100 according to the present embodiment installed in the insertion hole 14h of the copper plate 14A of the continuous casting mold 10, the temperature detection point state. 4, located molten steel surface 14e of the copper plate 14A is the left side, the cooling surface 14d of the copper plate 14A to the right side is positioned. Incidentally, FIG. 4, and, in FIG. 5, FIGS. 8 to 10 to be described later, for explanation, has been described with exaggerated part of each member constituting the temperature detection unit 100. In the following description, as an example, will be described temperature detector 100 which is inserted into the insertion hole 14h of the shorter side copper plates 14A, the temperature detector 100 in the insertion hole of the other of the copper plate of the mold 10 is similar to It is installed in.
[0035]
　Temperature detector 100 according to the present embodiment, as shown in FIG. 4, the support member 110, the tension member 120, and a sensor unit 130.. Sensor 130, FBG sensor 131 for detecting the temperature of the copper plate 14A is configured to be inserted into the hollow protection tube 135. Protective tube 135 is provided in order to prevent damage to the FBG sensor 131. Sensor unit 130 is fixed to the supporting member 110 is inserted into the insertion hole 14h of the copper plate 14A.
[0036]
　The support member 110 for supporting the sensor portion 130, the groove 111 along the longitudinal direction are formed. In the temperature detection points of the FBG sensor 131, the outer peripheral surface of the support member 110, tension member 120 is provided with heat resistance. Tension member 120 is, for example, a thread or a film-like member, is provided in a state of being taut in the opening portion of the groove 111. Hereinafter, among the tension member 120, the portion is stretched in the opening portion of the groove 111 that tension provided portion 122.
[0037]
　In the temperature detection point of FBG sensor 131, the sensor unit 130 is provided outside the tension provided portion 122. Then, when inserted into the insertion hole 14h, although the sensor unit 130 is pressed against the tension provided portion 122 by the inner surface of the insertion hole 14h, Zhang provided portion 122 is not Shiwawa most by this pressing force, maintaining the stretched state to. Therefore, the protective tube 135 of the sensor portion 130 is pushed toward the center of the protective tube 135 by the inner surface and Zhang outer provided portion 122 of the insertion hole 14h, deforms radially. Thus, the temperature sensing point of the sensor section 130 is suppressed moved in the insertion hole 14h, it is fixed to a predetermined position of the insertion hole 14h.
[0038]
　The temperature detecting unit 100 according to this embodiment, the sensor unit 130 is supported by the support member 110 via the tension provided portion 122 is stretched into the groove 111 of the support member 110. That is, the sensor unit 130 is not in contact with the supporting member 110 is provided while being spaced apart from the support member 110. Therefore, FBG sensors 131 of the sensor unit 130, hardly influenced by the heat of the support member 110, it is possible to detect the temperature of the point M1 in the insertion hole 14h with high accuracy. M1 points, out of the insertion hole 14h inner surface, the most upstream position of the heat flow direction, that is, the highest temperature position.
[0039]
　In other words, the temperature detecting unit 100 of the continuous casting mold 10 according to this embodiment has the following features.
(A) a sensor unit 130 which inserts the FBG sensor 131 to the protective tube 135. The inner diameter of the protective tube 135 is desirably not more than 0.5 mm.
The (b) a sensor unit 130, by using the tension member 120, fixed while maintaining a spaced state from the support member 110 is placed is inserted into the insertion hole of the continuous casting mold 10 copper plate.
(C) at a temperature detecting point of the sensor section 130, to hold the protective tube 135 and the insertion hole 14h inner and tension member 120.
[0040]
　The feature of (a), can be prevented damage to the FBG sensor 131 with protective tube 135. Further, the inner diameter of the protective tube 135 by a 0.5mm or less, it is possible to maintain a predetermined thermal response of the FBG sensor 131.
[0041]
　Further, the feature of (b), FBG sensor 131 is hardly influenced by the heat of the support member 110, the temperature of a predetermined position of the copper plate with high precision (eg, M1 points shown in FIG. 4) to detect the It can become. Further, in order to connect or disconnect the sensor unit 130 with respect to the copper plate of the insertion hole of the continuous casting mold 10 together with the supporting member 110, connecting or disconnecting the sensor unit 130 is facilitated, repeatedly it is possible to use the sensor unit 130.
[0042]
　Further, the feature of (c), the temperature sensing point of the sensor unit 130 can be suppressed from moving in the insertion hole, a predetermined position (eg, M1 points shown in FIG. 4) it is possible to measure the temperature at.
[0043]
　By the temperature detector 100 of such a continuous casting mold 10, a predetermined position of the copper plate (eg, M1 points shown in FIG. 4) the temperature of the can detected with high accuracy, and be readily removable from the copper plate It has become possible. Hereinafter, detailed configuration of each part constituting the temperature detection unit 100, will be described further.
[0044]
(2) Detailed Configuration
(supporting member)
　5 and 6 show the configuration of the support member 110 according to this embodiment. Figure 5 is a schematic side view showing an outline of the supporting member 110 according to this embodiment. Figure 6 is a partial enlarged view of the support member 110 shown in FIG. 5, upper diagram shows a state seen from the right side of FIG. 4, below shows a state seen from the left side of FIG. 4.
[0045]
　Support member 110 is a member for supporting the sensor unit 130. As the support member 110, for example, a metal rod cylindrical (e.g., copper rod) can be used. The support member 110, the sensor unit 130 is provided so that the longitudinal direction of the longitudinal direction of the sensor unit 130 corresponds. At this time, as shown in FIG. 5, in the longitudinal direction of the support member 110, the temperature detection point P of the sensor unit 130 may be 1 or more provided.
[0046]
　Support member 110 according to this embodiment, as shown in FIG. 6, a large diameter portion 112 consists of the small diameter portion 114.. Large-diameter portion 112 prevents backlash of the supporting member 110 when inserted into the insertion hole 14h. Therefore, the large-diameter portion 112 is formed to have a slightly smaller outer diameter than the inner diameter of the insertion hole 14h of the copper plate 14A. For example, the insertion hole 14h and the clearance between the large diameter portion 112 may be about 0.1 mm. Alternatively, or the like may be used tolerance relationship hole and the shaft for clearance fit shown in JIS standard or the like.
[0047]
　On the other hand, the small-diameter portion 114 has a smaller outer diameter than the large-diameter portion 112. The small diameter portion 114 is a portion tension member 120 is provided, as shown in FIG. 4, for example, to around the tension member 120 is wound. Small-diameter portion 114, when the temperature detector 100 is installed in the insertion hole 14h of the copper plate 14A, as tension member 120 does not contact the inner surface of the insertion hole 14h, are formed to miss its thickness. The diameter of the small diameter portion 114, tension member 120 in thickness and the protective tube 135 of the outer diameter and the like, are set in accordance with each part size, e.g., 0.2mm approximately smaller set than the diameter of the large-diameter portion 112. The sensor unit 130, the temperature detection point P on the small diameter portion 114 is fixed to the support member 110 to be positioned.
[0048]
　The support member 110, and such a large-diameter portion 112 and small diameter portion 114 are alternately formed. In all the places of the support member 110, it may not be provided alternately a large diameter portion 112 and small diameter portion 114 as shown in FIG. Further, the support member 110 according to the present embodiment, the length of the large diameter portion 112 in the longitudinal direction is about than half than the length of the small diameter portion 114 is not limited to the present invention is such an example, its length and can be appropriately set, the large-diameter portion 112, small diameter portion 114 may be different lengths of the respective.
[0049]
　Further, as shown in FIG. 6 below, the support member 110, one groove 111 in the longitudinal direction are formed. Support member 110 is made of a metal member, since it has an insertion hole 14h and the clearance of the mold 10, not necessarily the inner surface and the same temperature of the insertion hole 14h. Further, when the sensor unit 130 to the support member 110 are in contact, FBG sensor 131 measurement accuracy will undergo temperature influence of the support member 110 is lowered. Therefore, a groove 111 in the support member 110, with a tension member 120 which will be described later, by fixing the sensor portion 130 along the grooves 111 in the support member 110, spaced apart from the sensor unit 130 and the support member 110 it can be. This allows the sensor 130 to reduce the temperature influence from the support member 110. It will be described later method of fixing to the support member 110 of the sensor unit 130.
[0050]
　In this embodiment, the grooves 111 of the support member 110, as shown in FIG. 4, having a space of the cross-sectional shape of substantially square. The cross-sectional shape of the space of the present invention is not limited to this example, the groove 111 may be, for example, a triangular shape or a semicircular shape.
[0051]
(Tension member)
　tension member 120 serves to fix the sensor unit 130 to the support member 110, as shown in FIG. 4, insert the protective tube 135 of the sensor portion 130 which is inserted into the insertion hole 14h of the copper plate 14A pore 14h is a member for pressing the inner peripheral surface of the. The tension member 120 has elasticity, to use a filamentous or film-like member having heat resistance may, for example, can be used Kevlar® yarn like. Tension member 120, a plurality provided in the small diameter portion 114 of the support member 110 is stretched in the opening portion of the groove 111. For example, when using the tension member 120 of the thread, as shown in FIG. 4, the tension member 120, as put in the opening portion of the groove 111, one to several times, around the outer periphery of the small diameter portion 114 of the support member 110 It is wound. Of tension member 120, stretched portion to the opening portion is tension provided portion 122.
[0052]
　Tension member 120, in the temperature detection point P of the sensor unit 130, and pressed against the inner surface of the insertion hole 14h of the sensor unit 130 in the outer surface of the tension section component 122 is fixed. On the other hand, in the temperature detection point portion other than P of the sensor unit 130 at a portion positioned on the small diameter portion 114 of the support member 110, located in the space of the groove 111 of the sensor portion 130 in the inner surface of the tension member 120 make. And a portion is positioned portion and an inner be positioned outside of the sensor unit 130 with respect to tension member 120, providing repeated in the longitudinal direction, alternately sensor unit 130 within tension member 120 provided on the support member 110 It is combined. Thus, the sensor unit 130 is fixed to the support member 110 via the tension member 120. Support member 110 will be described later in detail positional relationship between the tension member 120 and the sensor unit 130.
[0053]
(Sensor section)
　on the basis of FIGS. 7 and 8, a configuration of the sensor section 130. FIG. 7 is a schematic explanatory diagram for explaining the principle of the FBG sensor 131. Figure 8 is a graph showing the response of the FBG sensor 131 when changing the diameter of the protective tube 135. Sensor unit 130 according to the present embodiment, as shown in FIG. 4, the FBG sensor 131 for detecting the temperature of the copper plate 14A, and a protective tube 135. To protect the FBG sensor 131.
[0054]
　FBG sensor 131 is a one of the optical fiber sensor, a change in temperature or strain is detected as a change in light wavelength. FBG sensor 131, as shown in FIG. 7, the core portion 132 through which light propagates, covering the outer periphery of the core portion 132, a clad portion 133 back to the core unit 132 by reflecting stray light, the outer periphery of the cladding portion 133 covering, consisting of covering portion 134 to protect the core 132 and cladding 133 from the external environment. The core unit 132, FBG132a is provided which is formed by overlapping a plurality of layers of different refractive index. Incidentally, the coating unit 134 may be omitted in the present invention.
[0055]
　FBG132a has a structure that reflects or transmits only light of a wavelength that is specified by a lattice spacing refractive index. When FBG132a by temperature changes expands and contracts, the grating period is changed, the wavelength of light reflected is changed by FBG132a. Therefore, the incident white light FBG sensor 131, by detecting the spectrometer wavelength λ of the reflected light, it is possible to determine the temperature at the location of FBG132a. That is, the position where FBG132a is provided a temperature detection point P. In general, it is possible to provide a plurality of FBG132a to one optical fiber, the interval can be set to about 10 mm.
[0056]
　FBG sensor 131 is a superfine, there is a possibility that broken and inserted into the insertion hole 14h of the copper plate 14A at the FBG sensor 131 alone. Therefore, in this embodiment, to protect the protective tube 135 a FBG sensor 131, to prevent damage to the FBG sensor 131.
[0057]
　Protective tube 135 is a tubular member deformable in the radial direction, to protect the FBG sensor 131 inserted into the cylinder. Protective tube 135 in the insertion hole 14h, in contact with the inner surface of the insertion hole 14h. Accordingly, when inserting the sensor portion 130 in the insertion hole 14h together with the support member 110, so that it can be easily inserted, the protective tube 135, the copper plate 14A heterogeneous material, preferably formed from a good material slip. For example, the protective tube 135 may be formed from a resin such as polyimide.
[0058]
　Here, the sensor unit 130 according to the present embodiment is formed by inserting the FBG sensor 131 to the protective tube 135. Sensor unit 130, the relationship between the outer diameter and the inner diameter of the protective tube 135 of the FBG sensor 131, the measurement accuracy and response of the FBG sensor 131 is different. Therefore, the outer diameter and the result of this is investigated a relationship between the inner diameter of the holes to be inserted the FBG sensor 131, find that the output response of the FBG sensor 131 inside diameter of the hole is inserted larger the FBG sensor 131 decreases did. Figure 8, the FBG sensor 131 assumes an inserted model pores formed in the copper block, showing the results of simulation for the output response of the FBG sensor 131 with respect to the temperature change of the pores. When considering the relationship between the inner diameter and the response of the protective tube 135 in the present embodiment, the pore inner surface in the simulation can be regarded as equivalent to the protection tube surface of this embodiment.
[0059]
　In the simulation, it was calculated when the temperature of the pore inner surface of the copper block was raised stepwise to 155 ° C. from 0.99 ° C., a temperature increase of FBG sensors located in the center of the pores. FBG sensor 131 was assumed as quartz having an outer diameter of 0.125 mm. Between the pore and the FBG sensor 131 are filled with air, the pore inner surface was uniform temperature. In such conditions, when the inner diameter of pores 0.2 mm, 0.5 mm, 1.0 mm, is changed from 3.0 mm, the time variation of the temperature which is estimated to be detected by the FBG sensor 131 8 It became like.
[0060]
　From FIG. 8, as the inner diameter of the pore is small, a shorter time it can be seen that detect the temperature of the pore inner surface. During continuous casting, in order to correctly grasp the internal template situation changes momentarily it requires a certain response within a predetermined time. For example, in order to ensure a response of more than 95% within 5 seconds, from FIG. 8, the inner diameter of the pores should be 0.5mm or less.
[0061]
　This suggests the need for pores in the viewpoint of the responsiveness of the variation. When pores securing the FBG sensor 131, due to the influence of elongation of the pores full length, not necessarily to be an accurate temperature measurement. Therefore, FBG sensor 131 should be loose with respect to the porous.
[0062]
　Meanwhile, FBG sensor 131, providing loosely with respect to the porous, since it is possible to move in the radial direction of the pores, the position in the radial direction of the pores not determined in one place. For example FBG sensor 131 may also contact the pore inner surface In some cases in the center of the pore. At this time, FBG sensor 131, responsive increases from the center of the pores closer to the inner surface, without depending on the internal diameter of the pores, FBG sensor 131 sufficiently quick response than a second to contact the inner pore surface there is a case that shows. That is, the more the inner diameter of pores is large, the FBG sensor 131 is a difference in the response in the case of contact with the case and the hole inner surface in the hole center is increased, the greater the variation of the response time of the FBG sensor 131.
[0063]
　For example, variations in the response time due to the position variation in the radial direction of the FBG sensor 131, the inner diameter of the pores whereas a 0 to 0.92 seconds in the case of 0.5 mm, an inner diameter of pores 3.0mm of the 0 to 3.18 seconds in the case. Thus, the variation in response time is increased, the reliability of the measured temperature of the FBG sensor 131 is impaired.
[0064]
　Moreover, unlike the present embodiment, when the FBG sensor 131 and applied between the protective tube 135, the protective tube 135 and is free even have clearance contact and non-contact between the copper plate hole 14h is, the FBG sensor 131 responsiveness of, become those overlapping response of Figure 8, the above results shown in FIG. 8, so that the large response delay occurs. Further, with respect to the insertion hole 14h, when the position in the radial direction of the protective tube 135 and the FBG sensor 131 Considering that vary, the response of the variation becomes even greater, the reliability of the measurement becomes more scarce.
[0065]
　In view of the foregoing, the sensor unit 130, the protective tube 135 inner diameter of 0.5mm or less, and by inserting the FBG sensor 131 loosely. Thus, FBG sensor 131, without being affected by the elongation strain of the protective tube 135, it is possible to maintain a predetermined response within a predetermined time period.
[0066]
　The fixing of the protective tube 135 and the FBG sensor 131, it may be fixed in at least one location, other than the fixed portion, as shown in FIG. 4, apart from the protective tube 135 and the FBG sensor 131. Fixing portion of the protective tube 135 and the FBG sensor 131, preferably provided on the opening side of all the temperature detection points insertion hole 14h than P of the FBG sensor 131. Thus, it is possible that all the temperature detection point P of the FBG sensor 131 to be unaffected in the elongation strain of the protective tube 135. For example, at the end located on the opening side of the insertion hole 14h when inserted into the insertion hole 14h, and fixing the protective tube 135 and the FBG sensor 131, a protective tube 135 and the FBG sensor 131 in the other part fixed it may not be.
[0067]
(3) inserting hole and the positional relationship between the temperature detecting portion
　temperature detector 100 consisting of the members described above, in the longitudinal direction, the large-diameter portion 112, small diameter portion 114 other than the temperature detection point P of the support member 110, and the temperature in each position of the small diameter portion 114 of the detection point P by varying the placement of each member, the sensor unit 130 is fixed to the support member 110 further includes a temperature detection point P of the sensor unit 130 is fixed in position there. 9-11 show cross-sectional views in the longitudinal direction of the temperature detecting portion 100. Figure 9 is a sectional view along D-D cutting line of Figure 6. Figure 10 is a cross-sectional view taken along E-E cutting line of FIG. Figure 11 is a cross-sectional view of Es-Es cutting line in FIG. 6, the left view shows a state before insertion into the insertion hole 14h, the right figure shows the state after insertion into the insertion hole 14h.
[0068]
(Configuration of the large-diameter portion)
　First, the large diameter portion 112 of the support member 110 tension member 120 is not provided, as shown in FIG. 9, the sensor unit 130 is located in the inner space of the groove 111 of the support member 110 to. Large-diameter portion 112, when inserted into the insertion hole 14h, because it is inner surface facing the portion of the insertion hole 14h, tension member 120 on the outer periphery of the large diameter portion 112 is not provided. In this case, the sensor unit 130 to a position in the inner space of the groove 111 can be provided without coming into contact with the inner surface of the insertion hole 14h.
[0069]
(Configuration of the small-diameter portion)
　on the small diameter portion 114 which are alternately arranged and the large diameter portion 112 in the longitudinal direction of the support member 110, a small diameter portion and the temperature detecting point portion other than P, the temperature detection point P is located is located There is a small diameter portion, configured differently in each. Between adjacent temperature detection point P, at least one temperature detection point P than
good to the small diameter portion which portion of the outside is located is provided. As described below, by difference and a small diameter portion which is positioned the temperature detection point P, the construction of the small-diameter portion which is a portion other than the temperature detecting point P located, the support member of the sensor unit 130 through the tension member 120 it is to fix the 110. In FIG. 6, for example, when the temperature detection point P is in the position of the Es-Es cutting line, a small diameter portion adjacent the small diameter portion of the temperature sensing point P is located across a large-diameter portion 112 (i.e., E-E cutting line the small-diameter portion) with the portion other than the temperature detection point P is located. Incidentally, the vicinity of the front end portion of the protective tube 135 is preferably set to the large diameter portion 112.
[0070]
Temperature detection points other than
　of the support member 110 to tension member 120 is provided a small diameter portion 114, at a position other than the temperature detection point P of the sensor portion 130, as shown in FIG. 10, the sensor unit 130, Zhang located in the space on the inside of the portion member 120 and the groove 111. In this case, the sensor unit 130 does not contact with the support member 110 is provided so as much as possible as will be separated, into contact with the tension provided portion 122 inside of the tension member 120. The reason will be described later, thereby, the sensor unit 130, it becomes less susceptible to heat from the support member 110, it is possible to increase the temperature measurement accuracy, and, by tension member 120 to the outside of the groove 111 by being regulated so as not to, can be fixed to the support member 110.
[0071]
　Moreover, in this way, the sensor unit 130 is along the grooves 111 in the longitudinal direction, and, as will be described later, is centripetal width center of the groove 111 after insertion into the insertion hole 14h. Thus, a deep (e.g., 400mm) of the case to be inserted into the insertion hole 14h of the temperature detector 100 can also determine better the accuracy (circumferential direction of the insertion hole) mounting direction of the sensor unit 130.
[0072]
Temperature detection points
　of the small-diameter portion 114 of the support member 110 tension member 120 is provided, the temperature detection point P of the sensor portion 130, as shown in FIG. 11, the sensor unit 130, the tension member 120 located on the outside. Before being inserted into the insertion hole 14h of the copper plate 14A, as shown in FIG. 11 left, the protective tube 135 is provided in contact with the outside of the tension provided portion 122 of tension member 120. Here, the sensor unit 130 is substantially is straight installed without flexed longitudinally. Accordingly, as shown in FIG. 6, the sensor unit 130 at a temperature detection point P and other portions, by installing through alternately outside and inside the tension member 120, the longitudinal direction given It is fixed as knitted into tension member 120 which is positioned. As described above, in the position other than the temperature detection point P of the small diameter portion 114, the sensor unit 130, also to be provided to contact the tension provided portion 122 inside of the tension member 120, due to such fixed it is.
[0073]
　In the temperature detection point P, the protective tube 135 is maintained substantially in a circle shape. In this state, the maximum length of the temperature detecting portion 100 in the radial direction, i.e., length to the outer periphery of the large diameter portion 112 of the support member 110 from the outer circumference of the protective tube 135 is slightly larger than the inner diameter of the insertion hole 14h It is set to be.
[0074]
　When the support member 110 where the sensor unit 130 is fixed is inserted into the insertion hole 14h of the copper plate 14A, as shown in FIG. 11 right, the protective tube 135 is pressed by the inner surface of the insertion hole 14h by tension section min 122 deformed radially, an elliptical shape. In this manner, by contacting against the temperature detection point P on the inner surface of the insertion hole 14h, and the outer interior surface and Zhang provided portion 122 of the insertion hole 14h, the contact area between the outer peripheral surface of the protective tube 135 increases, temperature detection point can be prevented from moving in the insertion hole 14h. Also, the more likely that the interval between the insertion hole 14h and Zhang provided portion 122 is located, the protective tube 135 in the vicinity M1 points becomes maximum, the installation position of the protective tube 135 (the circumferential position of the insertion hole 14h inner surface) is stable to. Therefore, it is possible to securely fix the temperature detection section P in a predetermined position, it is possible to improve the measurement accuracy. Further, similarly to the portions other than the temperature detection point P, the sensor unit 130, because it is spaced apart from the support member 110 by the groove 111, less susceptible to heat from the support member 110, to increase the temperature measurement accuracy it can. By further be FBG sensor 131 is provided loosely in the protective tube 135, without FBG sensor 131 is influenced by the elongation strain of the protective tube 135 can increase the temperature measurement accuracy.
[0075]
　Length from the opening to the outer circumference of opposing grooves 111 of the support member 110 (hereinafter referred to as "sensor unit width".) Ds is the sensor unit 130 width of the large-diameter portion 112, tension member 120 in thickness, protection It is determined according to the inner diameter of the outer diameter and the insertion hole 14h, the tube 135. For example, the temperature detection unit 100 is wound tension member 120 of the thread diameter 0.05mm to support member 110 with a diameter of 4 mm, an inner diameter of 0.5 mm, the protective tube 135 having a thickness of 0.04mm of diameter 0.125mm the sensor unit 130 formed through the FBG sensor 131 may be constituted by fixed. At this time, the inner diameter of the insertion hole 14h of the copper plate 14A for inserting the temperature sensing unit 100 can be sized to have to have a clearance of about 0.1mm in the outer diameter of the support member 110.
[0076]
　The position in the thickness direction (Y direction in FIG. 4) of the copper plate 14A of the protective tube 135 is in contact is determined by the installation precision in the circumferential direction of the support member 110. For example, if the thickness direction temperature gradient of the copper plate of 20 ° C. / mm, to a measurement error within 5 ° C., the tolerance of positional displacement in the thickness direction of the copper plate 14A is required to be within 0.25 mm. When this is converted in the circumferential direction of the deviation, it is necessary to keep the order of 0.73 mm ~ 0.83 mm. Therefore, to define the position in the thickness direction of the protective tube 135 with an accuracy of about 0.2 ~ 0.3 mm using a pin or the like at the top surface or the like of the copper plate 14A, it may define a circumferential position. Accordingly, the collapse allowance of the diameter of the protective tube 135, for example by a 0.2 mm, can be a measurement error of the FBG sensor 131 within a predetermined range. Furthermore, without the FBG sensor 131 is fixed sandwiched protective tube 135 also upon insertion of the temperature sensing unit 100 into the insertion hole 14h, FBG sensor 131 while maintaining a loose state to the protective tube 135, protection accuracy of reliably and position the tube 135 into the insertion hole 14h inner surface can also be good contact.
[0077]
　Collapse margin of the protective tube 135, and thus the inner diameter of the protective tube 135 is determined by the tolerance for fitting the fiber diameter of the insertion hole 14h and the support member 110. Minute of the difference between the maximum gap and the minimum clearance after fitting (gap deviation), collapse cost varies. Therefore, in order to contact the protective tube 135 to stably insert hole 14h is collapsed margin is, it is necessary that the gap deviation above. The gap deviation, the fitting tolerance is reduced when a high accuracy can be reduced even collapse margin. From JIS standard or the like, in a generally removable from the following rod outer diameter 4mm (the original material of the support member 110) in the insertion hole 14h is manufactured by the following tolerance 0.048mm in both the bar and the insertion hole 14h it is necessary, the processing cost of the holes and the supporting member is increased when reducing the tolerance. Insertion hole becomes a gap deviation of about 0.1mm when the tolerance of the rod to 0.048 mm, the collapse margin needs to be larger than 0.1mm.
[0078]
　The protective tube 135, since after deformation is FBG sensor 131 is loose from the protective tube 135, the inner diameter is required to be greater than the sum of the outer diameter and the gap deviation of the FBG sensor 131. The outer diameter of the optical fiber for applying a FBG sensor 131 and the like 0.05 mm ~ 0.15 mm. As described above, the insertion the holes 14h and to account for such suppressing expensive processing costs of the support member 110, the inner diameter of the protective tube 135, 0.15 mm (when optical fibers 0.05 mm) ~ 0.25 mm (fiber 0 .15mm at the time) or more is required. And points above, the simulation from the results shown in FIG. 8, from the fact that the upper limit of the inner diameter of the protective tube 135 is 0.5mm, the inner diameter of the protective tube 135 is required to be 0.15mm or more 0.5mm or less .
[0079]
　Furthermore, the heat capacity by reducing the thickness of the protective tube 135 can be reduced, and since it is also possible to insulate the support member 110, FBG sensor 131 can adapt to the copper plate temperatures at high response. Further, FBG sensor 131, as shown in FIG. 8, it is possible to react the copper plate temperatures at a sufficient response to the internal diameter of the protective tube 135 and 0.5mm or less. Accordingly, the temperature detecting unit 100 according to this embodiment can detect the copper plate temperature with high response using the FBG sensor 131.
[0080]
　The temperature detecting unit 100, as shown in FIG. 4, the sensor unit 130 to face the molten steel surface, is installed in the insertion hole 14h of the copper plate 14A. Thus, more reliably, it is possible to estimate the temperature of the molten steel surface.
[0081]
　It has been described construction of the first continuous casting mold 10 according to the embodiment of the present invention. According to the continuous casting mold 10 according to the present embodiment, the upper surface of the copper plate constituting the mold 10, open the pores from the underside or side, inserting the temperature sensing unit 100. Temperature detection unit 100, a sensor unit 130 which is formed by inserting the FBG sensor 131 inner diameter below the protective tube 135 0.5 mm, the support member 110 of the copper rod or the like is fixed through the tension member 120 It is formed by.
[0082]
　In this case, the sensor unit 130, by using the tension member 120, to maintain the spaced state from the support member 110, hardly influenced by the heat of the support member 110, it can be temperature measurement with high precision to become. Further, in order to connect or disconnect the sensor unit 130 with respect to the copper plate of the insertion hole of the continuous casting mold 10 together with the supporting member 110, connecting or disconnecting the sensor unit 130 is facilitated, repeatedly it is possible to use the sensor unit 130.
[0083]
　Further, the temperature detecting point of the sensor unit 130, by clamping the sensor portion 130 in the outer surface and the inner surface of the insertion hole 14h of the tension provided portion 122, suppress the temperature detection point of the sensor unit 130 from moving in the insertion hole It can be, in the desired position, it is possible to measure temperature with high accuracy.
[0084]
　<2. Second Embodiment>
　Next, with reference to FIGS. 12 to 16, will be described continuous casting mold 10 according to the second embodiment of the present invention. Continuous casting mold 10 according to this embodiment, as compared with the first embodiment, the temperature is the mold body shown in FIGS. 1 to 3 are the same, which is inserted into the insertion hole of the copper plate of the mold 10 detection unit is different in including a two FBG sensors. Hereinafter, description of the mold body as the first embodiment and the same components will be omitted, and will be described in detail the structure of the temperature detecting portion to be inserted into the insertion hole of the copper plate of the mold 10.
[0085]
　[2-1. A schematic configuration of a temperature detector]
　First, referring to FIG. 12, illustrating a schematic configuration of a temperature detector 200. Figure 12 is a schematic sectional view showing a temperature detector 200 of the present embodiment installed in the insertion hole 14h of the copper plate 14A of the continuous casting mold 10, the state of the temperature sensing point. Also in FIG. 12, similar to FIG. 4, located molten steel surface 14e of the copper plate 14A is the left side, the cooling surface 14d of the copper plate 14A to the right side is positioned. Note that, in FIGS. 12 to 16, for explanation, has been described with exaggerated part of each member constituting the temperature detection unit 200. In the following description, as an example, it will be described the temperature sensing unit 200 inserted into the insertion hole 14h of the shorter side copper plates 14A, the temperature detector 200 in the insertion hole of the other of the copper plate of the mold 10 is similar to It is installed in.
[0086]
　Temperature detection unit 200 according to the present embodiment, as shown in FIG. 12, composed of a support member 210, the tension member 120, a first sensor unit 130A and the second sensor unit 130B. The first sensor unit 130A and the second sensor unit 130B is, FBG sensors 131A for detecting the temperature of the copper plate 14A, 131B are hollow protective tube 135A, it is constituted respectively are inserted into 135B. The first sensor unit 130A and the second sensor unit 130B may be the same configuration as the sensor unit 130 according to the first embodiment.
[0087]
　The support member 210 for supporting the first sensor unit 130A and the second sensor unit 130B, 2 grooves 211, 213 along the longitudinal direction are formed. Two grooves 211 and 213 are formed in the same diameter upper, toward the molten steel surface side opening of the first groove 211, for example, the first sensor unit 130A corresponding, second the second sensor unit 130B corresponding towards the opening of the groove 213 to the cooling side, it is installed in the insertion hole 14h of the copper plate 14A. Thus, the temperature measured by the first sensor unit 130A and the second sensor unit 130B, the temperature distribution in the thickness direction of the copper plate 14A, i.e. it is possible to measure the heat flux in the copper plate. Further, it is possible to estimate the temperature of the molten steel surface from two points in the copper plate, it is possible to obtain an accurate temperature of the molten steel surface.
[0088]
　FBG sensors 131A, in the temperature detection points 131B, the outer peripheral surface of the support member 210, tension member 120 having heat resistance is provided. Tension member 120, as in the first embodiment, for example, a thread or a film-like member, is provided in a state of being taut in the opening portion of the groove 211 and 213. Hereinafter, this out of tension member 120, the portion is stretched in the opening portion of the first groove 211 first tension section 122, the portion is stretched in the opening portion of the second groove 213 second stretched that section 124.
[0089]
　FBG sensors 131A, the temperature detection point 131B, the first sensor unit 130A and the second sensor unit 130B is provided on the outside of the tension section min. The insertion when inserted into the hole 14h, but the first sensor unit 130A and the second sensor unit 130B is pressed against the tension provided portion by the inner surface of the insertion hole 14h, Zhang provided portion most Shiwawa not by this pressing force, to maintain the stretched state. Therefore, the protection tube of the first sensor unit 130A and the second sensor unit 130B 135A, 135B is, inner and outer side of the first tension section 122 of the insertion hole 14h, protective tube 135A by the outer side of the second tension section 124 It is pushed toward the center of 135B, deformed respectively in the radial direction. Accordingly, the temperature sensing point of the first sensor unit 130A and the second sensor unit 130B is suppressed moved in the insertion hole 14h, the insertion hole 14h and the first tension section 122, the second tension section 124 distance is fixed to a position of maximum. Therefore, this distance is to insert the supporting member 210 so as to match the point M1 is the maximum temperature position of the insertion hole 14h inner surface the position at which the maximum, the first sensor unit 130A is fixed to the M1 point position, the second sensor part 130B is fixed at the point M2 position. Among the insertion holes 14h inner surface, the point M1, as in the first embodiment, the most upstream position of the heat flow direction, that is, the highest temperature position. Also, of the insertion hole 14h inner surface, the point M2, the most downstream position of the heat flow direction, i.e., a lowest temperature position.
[0090]
　Also, as in the first embodiment, the temperature detecting unit 200 according to this embodiment, first Zhang first sensor unit 130A and the second sensor unit 130B is stretched over the groove 211 and 213 of the support member 210 portion 122 is supported by the support member 210 via a second tension section 124. That is, the first sensor unit 130A and the second sensor unit 130B is not in contact with the supporting member 210 is provided while being spaced apart from the support member 210. Therefore, FBG sensors 131A of the first sensor unit 130A and the second sensor unit 130B, 131B is hardly influenced by the heat of the support member 210, it is possible to detect the temperature with high accuracy.
[0091]
　Temperature detection unit 200 of the continuous casting mold 10 according to this embodiment, like the first embodiment, has the characteristics of the above (a) ~ (c), the temperature of the copper plate with high precision detection can, and it is possible to easily detachable from the copper plate. Further, the temperature detecting unit 200 according to the present embodiment, since it is possible to make the temperature measured at two points in the radial direction of the support member, the temperature distribution in the thickness direction of the copper plate 14A, that is, to measure the heat flux in the copper plate It becomes possible. Further, it is possible to estimate the temperature of the molten steel surface from two points in the copper plate, it is possible to obtain an accurate temperature of the molten steel surface.
[0092]
　[2-2. Positional relationship] between insertion hole and the temperature detecting section
　configuration of the temperature detector 200 of the present embodiment, based on FIGS. 13 to 16, more more
will be described in detail. Incidentally, FIG. 13 is a partial enlarged view of the support member 210, the upper diagram shows a state seen from the right side of FIG. 12, middle panel shows a state seen from the upper side of FIG. 12, below the figure It shows a state seen from the left side of 12. 14 to 16 are cross-sectional views in the longitudinal direction of the temperature detecting portion 200. Figure 14 is a cross-sectional view taken along D-D cutting line of Figure 13. Figure 15 is a cross-sectional view taken along E-E cutting line of Figure 13. Figure 16 is a cross-sectional view of Es-Es cutting line in FIG. 13, the left view shows a state before insertion into the insertion hole 14h, the right figure shows the state after insertion into the insertion hole 14h. Note that FIG. 13 shows a state before inserting the support member 210 into the insertion hole 14h, the state of the Es-Es cutting line in the center of FIG 13 corresponds to FIG. 16 left.
[0093]
　Support member 210 according to this embodiment is a member for supporting the sensor portion 130, the longitudinal direction of the first sensor unit 130A and the sensor unit 130A so that the longitudinal direction corresponding to the second sensor unit 130B, 130B is provided. Each sensor unit 130A, 130B is in the longitudinal direction of the support member 210, the temperature detection point P can be 1 or more provided.
[0094]
　Support member 210 according to this embodiment also, as in the first embodiment, as shown in FIG. 13, a large diameter portion 212 consists of the small diameter portion 214.. The large diameter portion 212 prevents backlash of the supporting member 210 when inserted into the insertion hole 14h. On the other hand, the small-diameter portion 214 has a smaller outer diameter than the large diameter portion 212. The small diameter portion 214 is a portion tension member 120 is provided, as shown in FIG. 12, for example, to around the tension member 120 is wound. Small-diameter portion 214, when the temperature detector 200 is installed in the insertion hole 14h of the copper plate 14A, as tension member 120 does not contact the inner surface of the insertion hole 14h, are formed to miss its thickness. The support member 210, and such a large-diameter portion 212 and small diameter portion 214 are alternately formed.
[0095]
　Further, the support member 210, as shown in FIG. 13 above figure and below, two grooves 211, 213 along the longitudinal direction are formed. The support member 210 is made of a metal member, since it has an insertion hole 14h and the clearance of the mold 10, not necessarily the inner surface and the same temperature of the insertion hole 14h. The sensor unit 130A to the support member 210, the 130B are in contact, FBG sensors 131A, the measurement accuracy will also receive the temperature influence of the support member 210 131B decreases. Therefore, a groove 211, 213 to the support member 210, with the tension member 120, by fixing the sensor unit 130A along the grooves 211 and 213, the 130B to the support member 210, the sensor unit 130A, and 130B it can be separated from the support member 210. This allows the sensor unit 130A, 130B is reduced the temperature influence from the support member 210.
[0096]
　In the present embodiment, the grooves 211 and 213 of the support member 210, as shown in FIG. 12, has a space of the cross-sectional shape of substantially square, not limited in the present invention is such an example, the grooves 211 and 213 cross-sectional shape of the space, for example, be a triangle or a semicircle. Further, even if the substantially rectangular cross-sectional shape as shown in FIG. 12, the depth of these grooves 211 and 213 may be shallower grooves.
[0097]
　Temperature detection unit 200 according to this embodiment, such a support member 210, two sensor portions 130A, 130B are provided on the same diameter upper. Sensor unit 130A, 130B is, can be formed in the same manner as the sensor unit 130 according to the first embodiment, a detailed description thereof will be omitted. Temperature detection unit 200 according to this embodiment also, in the longitudinal direction, the large diameter portion 212 of the support member 210, a small diameter portion 214 other than the temperature detection point P, and the temperature detection point P of the members at each position of the small diameter portion 214 by varying the arrangement, the sensor unit 130A to the support member 210, 130B and the fixed, further sensor unit 130A, the temperature detection point P of 130B is fixed to a predetermined position.
[0098]
(Configuration of the large-diameter portion)
　First, the large diameter portion 212 of the support member 210 which tension member 120 is not provided, as shown in FIG. 14, the sensor unit 130A, 130B is, the grooves 211 and 213 of the support member 210 located in the internal space. The large diameter portion 212, when inserted into the insertion hole 14h, because it is inner surface facing the portion of the insertion hole 14h, tension member 120 to the outer periphery of the large diameter portion 212 is not provided. In this case, the sensor unit 130A, 130B, in order to position the inner space of the grooves 211 and 213 can be provided without coming into contact with the inner surface of the insertion hole 14h.
[0099]
(Configuration of the small-diameter portion)
　on the small-diameter portion 214 are alternately arranged in the longitudinal direction in the large diameter portion 212 of the support member 210, a small diameter portion and the temperature detecting point portion other than P, the temperature detection point P is located is located There is a small diameter portion, configured differently in each. Between adjacent temperature detection point P, it is preferable small diameter portion at least one temperature sensing point portion other than P is located is provided. As described below, a small diameter portion which is positioned the temperature detection point P, by difference the configuration of the small-diameter portion which is a portion other than the temperature detecting point P located, the sensor unit 130A through the tension member 120, 130B, it is to fix the supporting member 210. In Figure 13, similar to FIG. 6, when the temperature detection point P is in the position of the Es-Es cutting line, a small diameter portion adjacent the small diameter portion of the temperature sensing point P is located across a large-diameter portion 212 (i.e., E the small-diameter portion) with a -E cutting line, the portion other than the temperature detection point P is located. The protective tube 135A, the vicinity of the distal end portion of 135B is preferably set to the large diameter portion 212.
[0100]
- other than the temperature detecting points
　of the small-diameter portion 214 of the support member 210 which tension member 120 is provided, the sensor unit 130A, at the position other than the temperature detection point P of 130B, as shown in FIG. 15, the sensor unit 130A, 130B is located in a space on the inside of the tension member 120 and the grooves 211, 213. In this case, the sensor unit 130A, 130B do not contact the support member 210, as much as possible apart, first tension section 122 of the tension member 120, so as to contact the inner side of the second tension section 124 It is provided. Thus, the sensor unit 130A, 130B, since less susceptible to heat from the support member 210, it is possible to increase the temperature measurement accuracy, and does not appear to the outside of the groove 211 and 213 by the tension member 120 by being regulated it can be fixed to the support member 210.
[0101]
　Moreover, in this way, the sensor unit 130A, 130B is, in the longitudinal direction is along the grooves 211 and 213, and, as will be described later, is centripetal width center of the groove 211, 213 after insertion into the insertion hole 14h. Thus, a deep (e.g., 400mm) of the case of inserting a temperature detecting portion 200 into the insertion hole 14h is also a sensor unit 130A, 130B, the mounting direction (circumferential direction of the insertion hole) can be determined accurately.
[0102]
Temperature detection points
　of the small-diameter portion 214 of the support member 210 which tension member 120 is provided, the sensor unit 130A, the temperature detection points 130B P, as shown in FIG. 16, the sensor unit 130A, 130B is Zhang located outside of the portion material 120. Before being inserted into the insertion hole 14h of the copper plate 14A, as shown in FIG. 16 left, the protective tube 135A, 135B is first tension section 122 of the tension member 120, so as to contact the outer side of the second tension section 124 It is provided to. Here, the sensor unit 130A, 130B are substantially are straight arranged without flexing in the longitudinal direction. Accordingly, as shown in FIG. 13, the sensor unit 130A, 130B is a temperature detection point P and other portions, by installing through alternately outside and inside the tension member 120, longitudinal It is fixed as knitted into tension member 120 provided at a predetermined position.
[0103]
　In the temperature detection point P, the protective tube 135A, 135B is maintained substantially in a circle shape, respectively. In this state, the maximum length of the temperature detecting portion 200 in the radial direction, i.e., the outer periphery up to the length of the protective tube 135B from the outer periphery of the protective tube 135A is set to be slightly larger than the inner diameter of the insertion hole 14h ing.
[0104]
　Sensor unit 130A, the supporting member 210 130B is fixed is inserted into the insertion hole 14h of the copper plate 14A, as shown in FIG. 16 right, the protective tube 135A, 135B, the first tension section 122, second Zhang is pressed against the inner surface of the insertion hole 14h is radially deformed by the portion 124, an elliptical shape. In this manner, by contacting against the temperature detection point P on the inner surface of the insertion hole 14h, the inner surface and the first tension section 122 of the insertion hole 14h, and an outer second tension section 124, the protective tube 135A, 135B of increasing the contact area between the outer peripheral surface, the temperature detection point can be prevented from moving in the insertion hole 14h. The insertion holes 14h and space more likely to position the protective tube 135A near M1 points of maximum of the first tension section 122, (circumferential positions of the insertion hole 14h inner surface) the installation position of the protective tube 135A It is stable. Similarly, the insertion hole 14h and space more likely to position the protective tube 135B in M2 near points of maximum of the second tension section 124, the installation position (circumferential positions of the insertion hole 14h inner surface of the protective tube 135B ) is stable. Therefore, it is possible to securely fix the temperature detection section P in a predetermined position, it is possible to improve the measurement accuracy. Further, similarly to the portions other than the temperature detection point P, the sensor unit 130A, 130B, so are spaced from the support member 210 by the grooves 211 and 213, less susceptible to heat from the support member 210, the temperature measurement accuracy it can be increased. Further FBG sensors 131A, 131B are protective tube 135A, that is provided loosely 135B, FBG sensors 131A, 131B are protective tube 135A, without being affected by the elongation strain of 135B, increasing the temperature measurement accuracy can.
[0105]
　From the opening of the groove 211 to the opening of the opposing grooves 213 length of the support member 210 (hereinafter referred to as "sensor unit width".) Ds is the sensor unit 130A in the large-diameter portion 212, 130B width, Zhang the thickness of the portion member 120, the protective tube 135A, is determined according to the inner diameter of the outer diameter of 135B and the insertion hole 14h,.
[0106]
　The position in the thickness direction (Y direction in FIG. 12) of the protective tube 135A, 135B are in contact with the copper plate 14A is determined by the installation precision in the circumferential direction of the support member 210. That is, necessary for the measurement error is within the allowable range, to calculate the allowable range of positional displacement in the thickness direction of the copper plate 14A, which was converted to the circumferential direction of the deviation, the protective tube 135A, allowance collapse diameter 135B to determine. Thus, FBG sensors 131A, can be a measurement error 131B within a predetermined range, FBG sensors 131A also upon insertion of the temperature sensing unit 200 into the insertion hole 14h, 131B each protective tube 135A, sandwiched 135B it without being fixed, FBG sensors 131A, 131B are protective tube 135A, respectively, while maintaining a loose state to 135B, the protective tube 135A, it is possible to reliably contact with the insertion hole 14h inner surface 135B.
[0107]
　Collapse margin, thus protecting tube 135A, the inner diameter of 135B, as in the first embodiment, is determined by the tolerance for fitting the fiber diameter of the insertion hole 14h and the support member 210. Minute of the difference between the maximum gap and the minimum clearance after fitting (gap deviation), collapse cost varies. Therefore, protection pipes 135A, to contact the stable insertion hole 14h of 135B, the collapse margin is, it is necessary that the gap deviation above. The gap deviation, the fitting tolerance is reduced when a high accuracy can be reduced even collapse margin. From JIS standard or the like, in a generally removable from the following rod outer diameter 4mm (the original material of the support member 210) in the insertion hole 14h is manufactured by the following tolerance 0.048mm in both the bar and the insertion hole 14h it is necessary, the processing cost of the holes and the supporting member is increased when reducing the tolerance. Insertion hole becomes a gap deviation of about 0.1mm when the tolerance of the rod to 0.048 mm, the collapse margin needs to be larger than 0.1mm.
[0108]
　The protective tube 135A, 135B after deformation FBG sensors 131A, 131B are protective tube 135A, in order to be loose from 135B, the inner diameter of FBG sensors 131A,
13 is greater than the sum of the outer diameter and the gap deviation 1B there is a need those. FBG sensors 131A, the outer diameter of the optical fiber for applying a 131B, etc. 0.05 mm ~ 0.15 mm. As described above, when considering the like to suppress an expensive processing costs of the insertion hole 14h and the support member 210, the protective tube 135A, the inner diameter of 135B is, 0.15 mm (when optical fibers 0.05 mm) ~ 0.25 mm ( when the optical fiber 0.15mm) or more is required. And the above points, the protective tube 135A, from the fact that the upper limit of the inner diameter of 135B is 0.5mm, the protective tube 135A, the inner diameter of 135B is required to be 0.15mm or more 0.5mm or less.
[0109]
　Furthermore, the protective tube 135A, it is possible to reduce the heat capacity by reducing the thickness of 135B, also, since can be thermally insulated from the support member 210, FBG sensors 131A, 131B are to conform to the copper plate temperatures at high response be able to. Further, FBG sensors 131A, 131B, as shown in FIG. 8, the protective tube 135A, it is possible to react the copper plate temperature responsive enough that the internal diameter of 135B to 0.5mm or less. Therefore, even if the temperature detection unit 200 according to this embodiment can detect the copper plate temperature with high response using FBG sensors 131A, the 131B.
[0110]
　The temperature detecting unit 200, as shown in FIG. 12, set up a first sensor unit 130A is the molten steel surface, so that the second sensor unit 130B faces the cooling surface side, into the insertion hole 14h of the copper plate 14A It is. Thus, more reliably, it is possible to estimate the temperature of the molten steel surface. Further, the temperature detecting unit 200 according to the present embodiment, since it is possible to make the temperature measured at two points in the radial direction of the support member, the temperature distribution in the thickness direction of the copper plate 14A, that is, to measure the heat flux in the copper plate It becomes possible. Further, it is possible to estimate the temperature of the molten steel surface from two points in the copper plate, it is possible to obtain an accurate temperature of the molten steel surface. Therefore, it is possible to highly accurately measure the molten steel surface temperature of the copper plate 14A (distribution), for the heat flux distribution, conventionally, it could not be determined only macroscopic heat flux averaged copper plate entirely, detailed thermal it is possible to determine the flow velocity distribution. As a result, more detailed process situational awareness, it is possible to process analysis.
[0111]
　It has been described construction of the second continuous casting mold 10 according to the embodiment of the present invention. According to the continuous casting mold 10 according to the present embodiment, the upper surface of the copper plate constituting the mold 10, open the pores from the underside or side, inserting the temperature sensing unit 200. Temperature detection unit 200 has an inner diameter of 0.5mm or less of the protective tube 135A, FBG sensors 131A to 135B, the first sensor unit 130A and the second sensor unit 131B respectively formed by inserting 131B, supporting the copper rod or the like the member 210 is formed by fixing through the tension member 120.
[0112]
　In this case, the sensor unit 130A, the 130B, by using the tension member 120, to maintain the spaced state from the support member 210, hardly influenced by the heat of the support member 210, to temperature measurement with high precision it is possible. Further, in order to connect or disconnect the sensor unit 130A, the copper plate of the insertion hole of the continuous casting mold 10 with the 130B support member 210, the sensor unit 130A, insertion and removal 130B is facilitated, the sensor unit 130A, utilized to repeatedly 130B it is possible.
[0113]
　The sensor unit 130A, at the temperature detection point 130B, the first tension section 122, by clamping the sensor unit 130A, 130B, between the inner surface of the outer surface and the insertion hole 14h of the second tension section 124, the sensor unit 130A , 130B temperature detection point can be suppressed from moving in the insertion hole, at the desired position, it is possible to measure temperature with high accuracy. Further, the temperature detecting unit 200 according to the present embodiment, since it is possible to make the temperature measured at two points in the radial direction of the support member, the temperature distribution in the thickness direction of the copper plate 14A, that is, to measure the heat flux in the copper plate It becomes possible. Further, it is possible to estimate the temperature of the molten steel surface from two points in the copper plate, it is possible to obtain an accurate temperature of the molten steel surface.
Example
[0114]
　To examine the effects of the present invention, the temperature detector 100 according to the first embodiment of the present invention, the temperature measured by the temperature detector 100, was verified for its response. In this embodiment, using experimental equipment that simulates the conditions of continuous casting machine mold, as shown in FIG. 17. In the experimental setup shown in Figure 17, on one side of the copper plate 310 corresponding to the mold copper plate, together with the cooling water for cooling one surface of the copper plate 310 by installing a water tank 320 which is water, the surface opposite the molten steel established a case 330 to inject heating block 340 that mimics. The copper plate 310, the thickness direction center, we established the temperature detector 350 of the present invention comprising a FBG sensor, the thickness direction on both sides of the temperature detecting portion 350, it was placed two thermocouples 362, 364. In the middle of the thickness direction position of the thermocouple 362 and 364, the temperature detection unit 350 is arranged.
[0115]
　The temperature detection section 350, inside diameter 0.5mm as a protective tube, a polyimide tube of length 400 mm, to constitute a sensor section by inserting the FBG sensor of diameter 0.125mm to the polyimide tube. Outside diameter 4mm as a supporting member, using a copper rod of the cylinder, length 400 mm, and the sensor portion in the small diameter portion of the support member is fixed with Kevlar® yarn. When inserted into the insertion hole of the copper plate 310, the temperature detection unit 350 becomes a state as shown in FIG. 4 at the temperature detection point, along with the polyimide tube is separated from the copper rod, polyimide tube insertion hole inner surface of the copper plate 350 It was pressed against the structure. At this time, the bill collapse of the polyimide tube was about 0.2mm.
[0116]
　On the other hand, the thermocouple 362 and 364, using a sheathed thermocouple diameter 0.5 mm. The sheathed thermocouple responsiveness (63%) is 15 ms. Moreover, inside the case 330, for measuring the temperature of the heating block was placed the same thermocouple with these.
[0117]
　The heating block 340 to about 300 ° C. in a case 330 installed in the copper plate 310 was charged, was brought into contact with one surface of the copper sheet 310. Then, by sampling the output of the thermocouple inside the thermocouple 362, 364 and the case 330 of the temperature detecting portion 350,2 present every 0.2 second. In the present embodiment, after the contacting copper plate 310 and the heating block 340, if there are 15 ℃ about temperature increase in 5 seconds, it is possible to determine the good or bad contact between the temperature detecting portion 350 and the copper plate 310. Further, by using this data, evaluation of the temperature accuracy was also performed at the same time by comparison with the thermocouple.
[0118]
　18 shows the output of thermocouple temperature detector 350,2 present internal thermocouple 362, 364 and the case 330 after the heating block on. 18, "FBG sensor" is the output of the temperature detecting portion 350, "TC1" is the output of the thermocouple inside the casing 330. "TC2" output of the thermocouple 362, "TC3" is the output of the thermocouple 364 showed an average of the "(TC2 + TC3) / 2".
[0119]
　As shown in FIG. 18, when the heating block 340 is turned to the case 330, the temperature of TC1 is up sharply. After the rise of TC1, slightly delayed TC2, FBG sensor, the output in the order of TC3 is rising. Moreover, the post-heating block 340 after turning 5 seconds (24 seconds time), TC2, a temperature difference of about 7.95 ° C. next TC3, the copper plate in the temperature distribution exceeds the accuracy of the thermocouple and the FBG sensor has occurred it was found.
[0120]
　The output of the FBG sensor, the average value of the thermocouple 362,364 ((TC2 + TC3) / 2) and the temperature transition is approximately coincident. Than this, FBG sensor is considered to have been detected the copper plate temperature with high accuracy. The output of the FBG sensor, the deviation between the average value of the thermocouple 362,364 ((TC2 + TC3) / 2), the average error 0.77 ℃, σ = 0.75 ℃, maximum error 4.4 ° C., the minimum error - was 3.0 ° C., good results satisfying the target ± 5 ℃ was obtained. In addition, the inner diameter of 3 ~ 4 mm in the mold copper plate, are possible hole processing depth 400 mm, the temperature detecting section configured substantially the same diameter, by a support member made from the same length of copper or stainless steel into the hole 350, it was also confirmed that it is readily removable from.
[0121]
　As described above, by using the temperature detecting portion of the present invention, without being affected by the distortion of the copper plate of the protective tube and the mold, and it was confirmed that the temperature of the copper plate can be satisfactorily detected.
[0122]
　Having described in detail preferred embodiments of the present invention with reference to the accompanying drawings, the present invention is not limited to such an example. It would be appreciated by those skilled in the relevant field of technology of the present invention, within the scope of the technical idea described in the claims, it is intended to cover various modifications, combinations, for even such modifications are intended to fall within the technical scope of the present invention.

The scope of the claims
[Claim 1]
　And the mold body of the continuous casting mold,
　is inserted into the insertion hole formed in the mold body, a temperature detector for detecting the temperature inside the mold,
provided with,
　the temperature detection section,
　deformable protection radially and inserted FBG (fiber Bragg grating) sensor into the pipe,
　is formed with a groove along a longitudinal direction, a support member for supporting the FBG sensor along the longitudinal direction,
consist,
　at the temperature detection point the a tension member which is stretched over the opening portion of the groove in the support member, by an inner surface of the insertion hole, the FBG sensor sandwich the protective tube is inserted, the mold for continuous casting.
[Claim 2]
　And the mold body of the continuous casting mold,
　is inserted into the insertion hole formed in the mold body, a temperature detector for detecting the temperature inside the mold,
provided with,
　the temperature detection section,
　deformable protection radially two FBG sensors inserted into the tube,
　and two opposing grooves radially formed along the longitudinal direction, a support member for supporting the two FBG sensors along a longitudinal direction,
made ,
　the temperature detecting point sandwich a tension member which is stretched over the two grooves each opening portion to the support member by an inner surface of the insertion hole, the FBG sensor, respectively inserted the protective tube, continuous casting mold.
[Claim 3]
　In the insertion hole, the FBG one sensor is disposed on the molten steel surface side of the mold body, the other of the FBG sensor is arranged on the cooling surface of the mold body, the mold for continuous casting according to claim 2 .
[Claim 4]
　The temperature detection unit, above the mold body is inserted from at least one of the lower or lateral, continuous casting mold according to any one of claims 1 to 3.
[Claim 5]
　The FBG sensor, in the insertion hole, the mold body is arranged in the thickness direction of the diametrically continuous casting mold according to any one of claims 1-4.
[Claim 6]
　The protective tube has an inner diameter is at 0.5mm or less, and, even when the deformation in the radial direction, configured as the inner diameter of the protective tube is greater than the outer diameter of the FBG sensor, according to claim 1 5 continuous casting mold according to any one of.
[Claim 7]
　The support member, in a longitudinal direction, said a small diameter portion which tension member is provided, than the small diameter portion and a large diameter portion of the large diameter,
　so that the temperature sensing point of the FBG sensor is positioned on the small diameter portion provided, the continuous casting mold according to any one of claims 1 to 6.
[8.]
　The FBG sensor is
　at the temperature detection point, the provided between the outer and inner surface of the insertion hole of the tension member,
　in the small-diameter portion which does not include the temperature detection point, an interior surface opposite said groove said It provided inside the tension member, a mold for continuous casting according to claim 7.
[Claim 9]
　It said tension member is made of a heat-fibers, continuous casting mold according to any one of claims 1-8.