Title of invention: Sliding nozzle device
Technical field
[0001]
　The present invention relates to a sliding nozzle device used for controlling the flow rate of molten metal, and more particularly to a sliding nozzle device having slide metal frame holders that can be opened and closed on both sides of the fixed metal frame on the long side.
Background technology
[0002]
　The sliding nozzle device is attached to, for example, a molten steel discharge port of a ladle, and two upper and lower refractory plates having nozzle holes are overlapped with each other and surface pressure is applied to the lower plate with respect to the upper plate. The flow rate of molten steel (molten metal) is controlled by linearly sliding and changing the opening of the nozzle hole.
[0003]
　Such a sliding nozzle device is generally a fixed metal frame that holds the upper plate, a slide metal frame that holds the lower plate and slides linearly to slide the lower plate with respect to the upper plate, It has a slide metal frame holding part for slidably holding the slide metal frame, an elastic body for applying a surface pressure between the upper and lower plates, and a drive device for driving the slide metal frame.
[0004]
　Generally, there is one slide metal frame holding portion, but there is also a type that is divided into two for the purpose of downsizing. For example, in Patent Document 1, as shown in FIGS. 8 and 9, two open/close metal frames (slide metal frame holding portions) 40 are provided symmetrically with respect to the center line of the slide metal frame 30 in the sliding direction. , Are attached to the fixed metal frame 20, respectively. The slide metal frame holding portion 40 includes a gate-shaped arm 41, a spring box 42, a surface pressure guide 48, and a sliding member 46. Specifically, the base end of the gate-shaped arm 41 is rotatably attached to the pin 22 provided on the fixed metal frame 20, and the spring box 42 is arranged between the arms 41a of the gate-shaped arm 41. A surface pressure guide 48 is integrally provided on the box 42.
[0005]
　In this sliding nozzle device, it is necessary to open the two slide metal frame holders to the outside and then close them when replacing the plate.
　However, when the sliding nozzle device is placed horizontally when the plates are replaced and the two slide metal frame holders are opened so that the two slide metal frame holders are located above and below, the upper slide metal frame holders are self-weighted. Since it is necessary to open it against (gravity), it is a burden on the operator, and even if it opens, it will return to the original even if it rotates due to its own weight. In addition, the lower slide metal frame holding portion is dangerous because it rotates due to its own weight and opens freely, and it is necessary to close against the own weight when closing it, which is a burden on the operator and also the return due to its own weight. There are also problems. Then, in order to avoid such a rotation of the slide metal frame holding portion due to its own weight, it is necessary to fix the slide metal frame holding portion with a hook or the like, which causes a problem of increasing the work time.
Prior art documents
Patent literature
[0006]
Patent Document 1: Japanese Patent Laid-Open No. 2014-208380
Summary of the invention
Problems to be Solved by the Invention
[0007]
　The problem to be solved by the present invention is, in a sliding nozzle device that is capable of opening and closing slide metal frame holding portions on both sides of a long side of a fixed metal frame, simultaneously opens and closes the slide metal frame holding portions on both sides by a simple operation. Is to be able to.
Means for solving the problem
[0008]
　According to the present invention, the following sliding nozzle devices (1) to (8) are provided.
(1) A
　sliding nozzle device provided with openable and closable slide metal frame holders on both sides of a fixed metal frame, wherein a shaft of the slide metal frame holders is rotated on both sides of the fixed metal frame. The slide metal frame holding parts on both sides have a first link part and a second link part respectively at the ends of the shafts, and one slide metal frame holding part is opened/closed to open the other slide metal frame. A sliding nozzle device in which the first link part and the second link part are connected by link means so that the shaft of the holding part rotates in the opposite direction to open and close the other slide metal frame holding part.
(2)
　The first link portion and the second link portion each have a connecting portion at a position eccentric from the central axis of the shaft, and a link bar as a link means intersects with a straight line connecting the central axes of the respective shafts. The sliding nozzle device according to (1), which is rotatably provided.
(3) When the
　slide metal frame holding part is closed, the first link part and the second link part are in a point-symmetrical position about the center of the straight line connecting the central axes of the respective shafts in the longitudinal section, The sliding nozzle device according to (2), wherein the parts are connected by one link bar.
(4)
　A first link bar and a second link bar are provided on the first link portion and the second link portion, respectively, and ends of the first link bar and the second link bar on the opposite side to the connecting portions are fixed metal frames. The sliding nozzle device according to (2), which is eccentrically and rotatably attached to a first gear and a second gear provided in the first gear and the second gear, and the first gear and the second gear mesh with each other.
(5)
　The sliding nozzle device according to any one of (2) to (4), wherein a connecting position between the first link portion or the second link portion and the link bar is adjustable.
(6)
　The sliding nozzle device according to any one of (2) to (4), wherein the length of the link means that connects the first link portion and the second link portion is adjustable.
(7)
　The sliding nozzle device according to any one of (1) to (6), which is used under the condition that the slide metal frame holders on both sides are located vertically when the plate is replaced.
(8)
　The sliding nozzle device according to (7), wherein the slide metal frame holding portions on both sides have different weights.
Effect of the invention
[0009]
　According to the present invention, when the slide metal frame holding portions on both sides are opened and closed, the other is opened and closed in conjunction with the opening and closing of one, so that the slide metal frame holding portions on both sides can be simultaneously opened and closed by a simple operation. it can. This simplifies the opening and closing work of the slide metal frame holding portions on both sides, and improves work efficiency.
　Furthermore, even with a sliding nozzle device that is used under the condition that the slide metal frame holders on both sides are located above and below when replacing the plate, the opening and closing work of the top and bottom slide metal frame holders is made lighter, and in any state. Since the opening and closing of the upper and lower slide metal frame holders are interlocked, the work is simplified and the work efficiency is improved.
Brief description of the drawings
[0010]
FIG. 1 is a perspective view of a sliding nozzle device according to a first embodiment of the present invention (in a state where a slide metal frame holding portion is open).
FIG. 2 is an exploded perspective view of a gate-shaped arm and a shaft of a slide metal frame holding portion in the sliding nozzle device according to the first embodiment of the present invention.
FIG. 3 is a side view of the sliding nozzle device according to the first embodiment of the present invention (in which the slide metal frame holding portion is closed).
FIG. 4 is a side view of the sliding nozzle device according to the first embodiment of the present invention (in a state where the slide metal frame holding portion is open).
FIG. 5 is an enlarged view of a first link portion in the sliding nozzle device according to the first embodiment of the present invention.
FIG. 6 is a side view of a sliding nozzle device that is a second embodiment of the present invention.
FIG. 7 is a perspective view of a sliding nozzle device that is a third embodiment of the present invention.
FIG. 8 is a cross-sectional view of the sliding nozzle device of Patent Document 1 (FIG. 2 of Patent Document 1).
FIG. 9 is a perspective view of the sliding nozzle device of Patent Document 1 (FIG. 1 of Patent Document 1).
MODE FOR CARRYING OUT THE INVENTION
[0011]
　Embodiments of the present invention will be described below based on the embodiments shown in the drawings.
[0012]
In
　this embodiment, the present invention is applied based on the sliding nozzle device of Patent Document 1, that is, FIG. 8 and FIG. Conventionally, the slide metal frame holder is rotatably held by the pin 22, but in this embodiment, the pin is integrated with the lower slide metal frame holder 4a as the shaft 5a as shown in FIGS. The shaft 5a is rotatably held by the two shaft holding portions 6 of the fixed metal frame 2. The shaft 5a is integrated with the gate-shaped arm 41a of the slide metal frame holding portion 4a by a screw 61, and a first link portion 7a is provided at an end portion of the shaft 5a.
　A shaft 5b is integrally provided on the upper slide metal frame holding portion 4b, and a second link portion 7b is provided at an end portion of the shaft 5b.
　That is, disk-shaped first link portions 7a and second link portions 7b are attached to the shafts 5a and 5b on both sides, and the respective link portions serve as connecting portions at positions eccentric to the central axis of the shaft. Pins 71a and 71b are provided so as to project. Both ends of one link bar 10 serving as linking means are rotatably attached to the pins 71a and 71b, respectively. The link bar 10 intersects a straight line connecting the central axes of the shafts 5a and 5b, and the distances between the centers of the shafts 5a and 5b and the pins 71a and 71b are the same.
[0013]
　As shown in FIG. 3, when the slide metal frame holding portions 4a and 4b on both sides are closed, the pin 71a of the first link portion 7a is at the 9 o'clock position, and the pin 71b of the second link portion 7b is at the 3 o'clock position. These link portions (pins 71a, 71b) are located at positions and have a point-symmetrical positional relationship with respect to the center of the straight line connecting the central axes of the shafts 5a, 5b in the longitudinal section.
[0014]
　FIG. 5 is an explanatory diagram of a mechanism for adjusting the connecting position between the connecting portion (pin 71a) of the first link portion 7a and the link bar 10. The link bar 10 has an elongated hole 10a, a screw 10b is screwed from an end of the link bar 10, and a tip portion 10b-1 thereof projects into the elongated hole 10a. A tip portion 10b-1 of the screw 10b has a U-shape and holds a pin 71a. That is, since the connecting position of the pin 71a and the link bar 10 is changed by moving the screw 10b forward and backward, the connecting length of the first link portion 7a (pin 71a) and the second link portion 7b (pin 71b) is adjusted. It is possible.
[0015]
　Next, the opening/closing mechanism of the slide metal frame holding portions 4a and 4b in this embodiment will be described. In FIG. 3, when the upper slide metal frame holding portion 4b is opened, the second link portion 7b provided on the shaft 5b rotates in the arrow direction (clockwise direction), and accordingly, the first link portion 7a moves in the opposite arrow direction. Since it rotates in the (counterclockwise direction), the slide metal frame holding portion 4a on the lower side can be opened at the same time by interlocking (state of FIG. 4).
[0016]
　Further, when closing the slide metal frame holding portions 4a and 4b, when the upper slide metal frame holding portion 4b is closed, the first link portion 7a rotates in the opposite direction to the second link portion 7b. The metal frame holder 4b can be interlocked and simultaneously closed. After closing the slide metal frame holders 4a and 4b on both sides, insert the stopper pin into the through hole that connects the slide metal frame holders 4a and 4b to the fixed metal frame, and complete the slide metal frame holders 4a and 4b. Make sure it is closed.
[0017]
　In the present invention, the shafts 5a and 5b of the two slide metal frame holding portions 4a and 4b are rotatably provided with respect to the fixed metal frame 2, so that the ends of these shafts 5a and 5b rotate in opposite directions. Can be connected to the above by a link mechanism (link means). Therefore, in the present invention, the link mechanism can be provided only on one short side of the fixed metal frame 2. The sliding nozzle device has a mechanism for opening and closing the slide metal frame 3 for plate exchange work and a mechanism for driving the slide metal frame 3 with a drive device. However, in the present invention, the link mechanism is provided on one side of the fixed metal frame 2. Since it can be provided only on the short side, these movements are not affected.
[0018]
　In the present invention, the connecting portion 71a of the first link portion 7a and the connecting portion 71b of the second link portion 7b are connected so that the link bar 10 intersects a straight line connecting the central axes of the shafts 5a and 5b. Then, the link portions of each other rotate in opposite directions. Therefore, the movement of the link mechanism can be reduced. In this embodiment, disks are provided on the shafts 5a and 5b as the link portions 7a and 7b, but other disks can be applied, for example, rod-shaped objects or plate-shaped objects can be used.
[0019]
　Further, when the slide metal frame holding portions 4a and 4b are closed, the first link portion 71a and the second link portion 71b are located in a point-symmetrical position about the center of the straight line connecting the central axes of the respective shafts in the longitudinal section. By so doing, the first link portion 71a and the second link portion 71b can rotate in reverse substantially in synchronization even if they are connected by the single link bar 10. Therefore, since a simple link mechanism can be used, the maintainability is excellent and the device can be made compact. Further, by finely adjusting the connecting length of the first link portion 71a and the second link portion 71b with the screw 10b of the elongated hole 10a of the link bar 10, when the two slide metal frame holding portions 4a, 4b are closed. It can be completely closed without slipping.
[0020]
　In this embodiment, the lower slide metal frame holding portion 4a and the upper slide metal frame holding portion 4b have almost the same weight and are eccentrically fixed to the shafts 5a and 5b, respectively. Since the lower slide metal frame holding portion 4b rotates downward by the action of the own weight (gravity) of the slide metal frame holding portion 4b, almost no force is applied to the work of opening the upper slide metal frame holding portion 4b.
　On the contrary, when closing the slide metal frame holding portions 4a and 4b, the upper slide metal frame holding portion 4b tries to rotate in the closing direction (downward) by the action of its own weight (gravity), so that this work also requires almost no force. Does not hang.
　Therefore, when the slide metal frame holding portions 4a and 4b have the same weight, the slide metal frame holding portions 4a and 4b stop at an arbitrary position without naturally rotating. On the other hand, when it is desired to open or close the slide metal frame holders 4a and 4b by its own weight, one slide metal frame holder is heavier than the other, whereby the balance is lost and the slide metal frame holders can be naturally rotated.
[0021]
　Although this embodiment is a horizontal type sliding nozzle device in which the slide metal frame holders 4a and 4b are vertically positioned during plate replacement, the slide metal frame holders 4a and 4b are positioned laterally during plate replacement. The present invention can be applied even to a vertical type sliding nozzle device.
[0022]

　This embodiment is an example in which a link bar having a third link portion in the middle is used as the linking means. In addition, in this embodiment, since the side surface of the fixed metal frame 2 has a protrusion, the link bar 10 of the first embodiment cannot be attached, and the third link portion is used to avoid the protrusion. is there.
[0023]
　That is, as shown in FIG. 6, an intermediate rotating portion 11 is rotatably provided as a third link portion at the center of the short side surface of the fixed metal frame 2, and the intermediate rotating portion 11 has a first link bar 11a. And one end of the second link bar 11b is rotatably connected. The other end of the first link bar 11a is rotatably connected to the first link portion 7a, and the other end of the second link bar 11b is rotatably connected to the second link portion 7b. The first link bar 11a has a turnbuckle 11c on the way, whereby the length of the first link bar 11a, and by extension, the first link portion 7a (pin 71a) and the second link portion 7b (pin 71b). The length of the link means for connecting and is adjustable.
[0024]
　FIG. 6 shows a state in which the slide metal frame holding portions 4a and 4b are opened, and when the slide metal frame holding portions 4a and 4b are closed from this state, the first link portion 7a and the intermediate rotating portion 11 move in the counterclockwise direction. Rotate. On the other hand, the second link portion 7b rotates clockwise. Therefore, when the slide metal frame holding portion 4a is closed, the slide metal frame holding portion 4b can be simultaneously closed in conjunction with each other. Similarly, when opening the slide metal frame holders 4a and 4b, the first link portion 7a and the second link portion 7b rotate in opposite directions, so that the slide metal frame holders 4a and 4b can be simultaneously opened in an interlocking manner. ..
[0025]

　Referring to FIG. 7, similarly to the first embodiment, disk-shaped first link portions 7a and second link portions 7b are attached to the shafts 5a and 5b on both sides, respectively. Pins 71a and 71b as projecting portions are provided on the link portion at positions eccentric with respect to the central axis of the shaft. A first link bar 13a and a second link bar 13b are rotatably attached to these pins 71a and 71b.
[0026]
　On the other hand, on the short side surface of the fixed metal frame, the first gear 12a and the second gear 12b are rotatably held so as to mesh with each other, and each gear has pins 121a and 121b at eccentric positions. ing. The first link bar 13a and the second link bar 13b are rotatably connected to the pins 121a and 121b.
　Since the first gear 12a and the second gear 12b mesh with each other as described above, the shafts 5a and 5b on both sides rotate in opposite directions, so that the slide metal frame holders 4a and 4b can be simultaneously opened and closed. It will be possible.
Explanation of symbols
[0027]
　1 Sliding Nozzle Device
　2 Fixed Metal Frame
　3 Slide Metal Frames
　4a, 4b Slide Metal Frame
　Holders 41a, 41b Gate Arms
　5a, 5b Shaft
　6 Shaft Holder
　61 Screw
　7a First Link
　71a Pin
　7b Second Link
　71b Pin
　10 link bar
　10a long hole
　10b screw
　10b-1 screw tip
　11 intermediate rotating part
　11a first link bar
　11b second link bar
　11c turnbuckle
　12a first gear
　121a pin
　12b second gear
　121b pin
　13a first link bar
　13b Second link bar
The scope of the claims
[Claim 1]
　A sliding nozzle device capable of opening and closing slide metal frame holding parts on both sides of a long side of a fixed metal frame, wherein shafts of the slide metal frame holding parts are rotatable on both sides of the long side of the fixed metal frame. Each of the slide metal frame holding parts has a first link part and a second link part at the ends of the shafts of the slide metal frame holding parts on both sides. A sliding nozzle device in which a first link part and a second link part are connected by a link means so that the other slide metal frame holding part is opened and closed when the shaft rotates in the reverse direction.
[Claim 2]
　The first link portion and the second link portion each have a connecting portion at a position eccentric from the central axis of the shaft, and the link bar as a link means at these connecting portions intersects with a straight line connecting the central axes of the respective shafts. The sliding nozzle device according to claim 1, wherein the sliding nozzle device is rotatably provided.
[Claim 3]
　When the slide metal frame holding portion is closed, the first link portion and the second link portion are located in a point-symmetrical position with respect to the center of the straight line connecting the central axes of the respective shafts in the longitudinal section, and the connecting portions are The sliding nozzle device according to claim 2, wherein the sliding nozzle device is connected by one link bar.
[Claim 4]
　A first link bar and a second link bar are provided on the first link part and the second link part, respectively, and ends of the first link bar and the second link bar on the opposite side to the connecting parts are fixed metal frames. 3. The sliding nozzle device according to claim 2, wherein the sliding nozzle device is eccentrically and rotatably attached to a first gear and a second gear provided on the first gear, and the first gear and the second gear mesh with each other.
[Claim 5]
　The sliding nozzle device according to any one of claims 2 to 4, wherein a connecting position between the first link portion or the second link portion and the link bar is adjustable.
[Claim 6]
　The sliding nozzle device according to any one of claims 2 to 4, wherein a length of a link means that connects the first link portion and the second link portion is adjustable.
[Claim 7]
　The sliding nozzle device according to any one of claims 1 to 6, which is used under the condition that the slide metal frame holding portions on both sides are located above and below when the plate is replaced.
[Claim 8]
　The sliding nozzle device according to claim 7, wherein the weights of the slide metal frame holding portions on both sides are different.