Name of the invention: roller assembly, casting apparatus and method for separating roller thereof
Technical Field
[One]
The present invention relates to a roller assembly, a casting apparatus, and a method of separating the rollers thereof, and more particularly, to a roller assembly capable of retracting the roller in the movement path of a workpiece, and a roller fused to a slab on the movement path in an emergency. And a roller separating method thereof.
Background
[2]
Continuous casting equipment is a facility that produces cast steel using molten steel.It is a segment that draws cast steel from the mold and mold that receives molten steel stored in the molten steel and primary solidification into cast steel after receiving molten steel from the tundish. It is composed. At this time, the segments are continuously arranged below the mold along the movement path of the cast steel.
[3]
Conventional segments are continuously arranged at the lower side of the mold to guide and push down the cast pieces, a plurality of roller assemblies to rotatably support both ends of the guide roll, are continuously arranged at the bottom side of the mold, the movement path of the cast Spaced apart so as to face each other in two, the upper frame and the lower frame, the plurality of roller assemblies are mounted and supported, respectively, a plurality of tie rods connecting the upper frame and the lower frame spaced apart from each other, to provide a pressing force to the slab It includes a hydraulic cylinder that can adjust the distance between the upper frame and the lower frame spaced apart from each other.
[4]
Conventional segments with hydraulic cylinders are frequently damaged due to high temperature and high humidity operating environment and high iron static pressure inside the cast steel. At this time, the part which mainly breaks is a hydraulic cylinder part, Therefore, in recent years, the segment of the structure which removed the hydraulic cylinder and fixed the roll gap is mainly used.
[5]
On the other hand, if an emergency situation such as molten steel leaks out or the cast is stagnated during casting, cut the cast inside the segment, lift the segment together with the cast in order to recover the equipment, and then wait for maintenance to complete the new segment A sequence of steps is performed in order from upstream to downstream of the travel path.
[6]
In this case, when the thickness of the cast steel is thick, it is impossible to cut the cast steel, and therefore, the segments must be lifted separately. In the above-mentioned emergency situation, since most of the rollers are fused to the cast steel, it is difficult to separate the segments for repairing the equipment. It is difficult to cope with the above emergency situation.
[7]
The background art of this invention is published in the following patent document.
[8]
(Prior art document)
[9]
(Patent literature)
[10]
(Patent Document 1) KR10-2017-0065963 A
Detailed description of the invention
Technical challenges
[11]
The present invention provides a roller assembly capable of retracting a roller in the movement path of a workpiece.
[12]
The present invention provides a casting apparatus capable of separating a roller fused to a cast piece on a moving path in an emergency.
[13]
The present invention provides a roller separation method capable of separating a roller fused to a cast piece on a movement path in an emergency.
Challenge solution
[14]
A roller assembly according to an embodiment of the present invention includes a roller assembly capable of retracting a roller in a movement path of a workpiece, the roller assembly comprising: a support rotatably supporting the roller disposed in the movement path; A fixed shaft mounted to the rear surface of the support and at least partially stretchable; A body mounted to surround the fixed shaft at the rear side of the support; And a plunger connected to the body and the fixed shaft and formed to at least partially move forward and backward with respect to the movement path.
[15]
The plunger may be formed such that at least a portion of the plunger retracts using hydraulic pressure and retracts the fixed shaft from the movement path.
[16]
The plunger is mounted through the rear surface of the body and may be connected to the rear end of the fixed shaft.
[17]
The plunger may include a hollow outer cylinder having a front end mounted on a rear surface of the body, and having a step formed on an inner circumferential surface thereof, and having an inner diameter at the rear end of the step being greater than an inner diameter of the front end; An inner cylinder mounted through the outer cylinder, having a stepped portion formed on an outer circumferential surface thereof, and having an outer circumferential surface contacting the inner circumferential surface of the outer cylinder; A connecting shaft protruding from a front end of the inner cylinder and connected to a rear end of the fixed shaft through a rear surface of the body; And an injection hole mounted through the outer cylinder to inject fluid into the hydraulic space formed by the step and the step to form the hydraulic pressure.
[18]
The plunger may further include an inlet valve mounted to the inlet and open in an intermittent manner.
[19]
A casting device according to an embodiment of the present invention, a casting device for casting a cast, comprising a plurality of segments continuously arranged below the mold to guide the movement of the cast drawn from the mold, the segment, A plurality of rollers spaced apart to face each other with the moving paths of the cast pieces interposed therebetween and continuously arranged along the moving paths; And a plurality of roller assemblies mounted to the plurality of rollers, the plurality of roller assemblies being configured to at least partially move forward and backward with respect to the movement path.
[20]
The segment includes a first frame and a second frame spaced apart to face each other with the movement path therebetween, each of which is supported by a plurality of roller assemblies, wherein the roller assembly is at least partially reversed using hydraulic pressure. The roller may be formed to retract from the movement path.
[21]
The roller assembly may include a support rotatably supporting the roller; A fixed shaft mounted to the rear surface of the support and at least partially stretchable; A body mounted to surround the fixed shaft at the rear side of the support; And a plunger mounted through the rear surface of the body and connected to the rear end of the fixed shaft, the plunger being configured to at least partially move forward and backward with respect to the movement path using hydraulic pressure.
[22]
The roller separation method which concerns on embodiment of this invention is a roller separation method which isolate | separates a roller from the slab on a movement path, The process of drawing a slab from a mold; Guiding the movement of the slab drawn from the mold using a plurality of segments continuously arranged along a movement path; During or during the movement of the cast piece, the roller assembly is retracted from the movement path by retracting the plurality of roller assemblies mounted on the plurality of rollers provided in the segment and formed so that at least a portion thereof can move forward and backward with respect to the movement path. And separating the roller supported on the cast steel from the cast.
[23]
The step of separating the roller from the cast steel, the process of applying a hydraulic pressure inside the roller assembly to retract a portion of the roller assembly from the movement path; And retracting the roller connected to a part of the roller assembly from the moving path.
[24]
The process of separating the roller from the cast steel may further include applying the hydraulic pressure to the inside of the roller assembly in an intermittent manner.
Effects of the Invention
[25]
According to the embodiment of the present invention, by using the plunger structure provided so that only a part of the apparatus can be easily retracted, a plurality of rollers arranged in series along the movement path of the workpiece can be easily retracted from the movement path of the workpiece, respectively.
[26]
For example, when applied to a continuous casting facility, the roller assembly of the segment consists of a roller assembly to which the plunger structure is applied, and when the roller is fused to the cast steel by the outflow of molten steel or stagnation of the cast steel, etc. The hydraulic pressure can be formed, and the hydraulic pressure can be used to retract the fixed shaft of the roller assembly from the movement path of the cast steel, and the roller supported on the fixed shaft can be easily separated from the cast steel.
[27]
That is, in an emergency situation such as molten steel spillage or stagnation of cast steel, the roller can be separated from the cast steel by applying hydraulic pressure to the plunger of the roller assembly, so that the cast and continuous casting facilities can be easily and quickly separated in an emergency. This can significantly reduce the time and manpower required to repair a facility.
Brief description of the drawings
[28]
1 is a schematic view of a casting apparatus according to an embodiment of the present invention.
[29]
2 is a schematic diagram of a segment according to an embodiment of the present invention.
[30]
3 is a schematic view of a roller assembly according to an embodiment of the present invention.
[31]
4 is an operation of the roller assembly according to an embodiment of the present invention.
Embodiment for Invention
[32]
Hereinafter, with reference to the accompanying drawings, it will be described an embodiment of the present invention; However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. Only embodiments of the present invention are provided to complete the disclosure of the present invention and to fully inform the scope of the invention to those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS The drawings may be exaggerated to illustrate embodiments of the invention, and like reference numerals in the drawings indicate like elements.
[33]
1 is a schematic view of a casting apparatus according to an embodiment of the present invention.
[34]
Referring to Figure 1, a casting apparatus according to an embodiment of the present invention will be described. A casting apparatus according to an embodiment of the present invention is a casting apparatus for casting a processed material, for example, the cast 1 using the mold 30, to guide the movement of the cast (1) drawn from the mold 30 ( And a plurality of segments 500 which are arranged successively below 30).
[35]
The segments 500 may be continuously arranged in a predetermined direction so as to form the movement path 40 of the cast 1 below the mold 30. That is, each segment 500 may be installed below the mold 30 to form the movement path 40 of the cast steel 1. In this case, the shape and shape of the movement path 40 may vary. For example, the movement path 40 may be curved or vertical curved and may also be vertical. In addition, the movement path 40 of the slab 1 may be called a cooling line, and the some segment 500 may be called a cooling stand.
[36]
Each segment 500 may have a plurality of rollers and a refrigerant nozzle (not shown). Each segment 500 guides the slab 1 drawn out of the mold 30 using a plurality of rollers to press and shape the slab 1 and to cool the slab 1 with a plurality of refrigerant nozzles. For example, it is possible to solidify and cool the cast 1 by spraying cooling water.
[37]
Casting apparatus according to an embodiment of the present invention, the ladle 10 for carrying molten material, such as molten steel, the molten steel is supplied from the ladle 10 to temporarily store the tundish 20, the molten steel is supplied from the tundish 20 It may further include a mold (30) for receiving and solidifying in the shape of a cast.
[38]
The configuration and manner of the ladle 10, the tundish 20 and the mold 30 described above may be various, it is not necessary to specifically limit the embodiment of the present invention. The detailed description thereof is omitted in order not to obscure the subject matter of the present invention.
[39]
2 is a schematic diagram of a segment according to an embodiment of the present invention. Referring to FIG. 2, a segment according to an embodiment of the present invention will be described.
[40]
Segment 500 according to an embodiment of the present invention, a plurality of rollers 510, spaced apart so as to face each other with the movement path 40 of the cast piece 1 therebetween, continuously arranged along the movement path, It is mounted to the roller 510, and includes a plurality of roller assembly 520 is formed so that at least a portion can move forward and backward with respect to the movement path (40).
[41]
In addition, the segments 500 may include a first frame 530a and a second frame 530b spaced apart to face each other with the movement path 40 interposed therebetween, and each of the roller assemblies 520 is supported. Can be.
[42]
As illustrated in FIG. 2, the plurality of rollers 510 may be continuously arranged in a direction in which the movement path extends at positions spaced apart from each other in the front-rear direction. In this case, the front-rear direction may be a direction in which the first frame 530a and the second frame 530b are spaced apart from each other. Of course, the plurality of rollers 510 may be continuously arranged in a direction in which the movement path extends at positions spaced apart from each other in the vertical direction. In this case, the first frame 530a and the second frame 530b may be spaced apart from each other in the vertical direction. That is, the plurality of rollers 510, the first frame 530a, and the second frame 530b may be variously disposed in the direction in which the movement path extends.
[43]
The plurality of rollers 510 may extend in left and right directions, respectively. Here, the left and right directions may be directions crossing both the front and rear directions and the vertical direction, for example, a direction crossing the movement path.
[44]
The first frame 530a and the second frame 530b are main bodies of the segment 500 and may be spaced apart from each other in the front-rear direction as shown in FIG. 2. Of course, the first frame 530a and the second frame 530b may be spaced apart from each other in the vertical direction.
[45]
The first frame 530a and the second frame 530b may be fixedly installed at respective positions, and the intervals between the first frame 530a and the second frame 530b may be fixed at predetermined intervals. A plurality of rollers 510 are disposed on respective surfaces of the first frame 530a and the second frame 530b facing each other, and the cast pieces are drawn between the first frame 530a and the second frame 530b to form a plurality of rollers 510a. It can be moved while being supported by the two rollers (510).
[46]
The plurality of rollers 510 may be installed to enable axial rotation about an axis (not shown) in the left and right directions, and for this purpose, the plurality of rollers 510 are roller assemblies 520 at both ends of each of the left and right directions. Each may be installed. The plurality of roller assemblies 520 may support the respective rollers 510 to be axially rotated in the left and right directions.
[47]
The plurality of roller assemblies 520 are spaced apart in the front-rear direction and spaced apart from each other in the front-rear direction with the plurality of rollers 510 facing each other interposed therebetween, and the rollers on the first frame 530a side of the plurality of rollers 510 ( 510 are connected to the first frame 530a, respectively, and the rollers 510 on the second frame 530b side are connected to the end of each roller 510 in the front-rear direction so as to connect the second frame 530b, respectively. Can be.
[48]
The segment 500 of the above-described structure may be referred to as a fixed roll gap segment.
[49]
On the other hand, as a structure different from the above-described embodiment of the present invention, for example, the segment (not shown) according to the comparative example is installed, for example, the first frame and the second frame are connected to each other by tie rods, and the first by the hydraulic cylinder. It is composed of a structure in which the interval between the frame and the second frame is adjusted. At this time, the segment according to the comparative example is called a segment having a hydraulic cylindrical roll gap adjusting device or a variable roll gap type segment.
[50]
Segment 500 according to an embodiment of the present invention has the advantage of easy inspection, maintenance, and repair of the facility compared to the segment according to the comparative example. In addition, the segment according to the comparative example is difficult to operate and handle by a tie rod and a hydraulic cylinder vulnerable to breakage in the high temperature and high humidity environment of the casting apparatus, the segment 500 according to an embodiment of the present invention is the first frame (530a) Since the second frame 530b is fixedly installed at a predetermined position, it is relatively easy to operate and handle.
[51]
On the other hand, the roller 510 may be fused to the cast in an emergency situation, such as leakage of molten steel or stagnation of the cast, in this case, the roller 510 from the cast using the roller assembly 520 according to an embodiment of the present invention. Can be separated by force. At this time, the hydraulic pressure is injected into the inside of the plunger 524, which will be described later, of the roller assembly 520, for example, to retract the fixed shaft 522 of the roller assembly 520 so that the roller connected to the fixed shaft 522 ( 510 may be retracted. Therefore, the separation of the roller 510 and the cast can be performed simply,
[52]
That is, the segment 500 according to the embodiment of the present invention is a fixed roll gap type segment in which the interval between the first frame 530a and the second frame 530b is fixed. At this time, the separation of the cast and the casting device for the recovery of the casting device may be easy, and in detail, the roller assembly 520 may be used to facilitate the separation of the cast and the roller without damaging the entire apparatus in an emergency.
[53]
3 is a schematic view of a roller assembly according to an embodiment of the present invention, Figure 4 is an operation of the roller assembly according to an embodiment of the present invention. At this time, (a) of Figure 4 is an operation of the roller assembly showing a state of supporting the roller on the movement path during normal operation, Figure 4 (b) is a state in which the roller assembly retracts the roller from the movement path in the emergency It is an operation of the roller assembly showing the.
[54]
Roller assembly 520 according to an embodiment of the present invention, in addition to being used as a support and retraction device of the roller in the segment 500 of the casting device, it is installed in the movement path of various processing equipment to guide the movement of the processing material It can be used as a support and retraction device for rollers.
[55]
3 and 4, the roller assembly 520 according to an embodiment of the present invention will be described in detail. The roller assembly 520 according to an embodiment of the present invention is a roller assembly 520 capable of retracting a workpiece, for example, a roller 510 disposed in a moving path of a cast steel, from a moving path of a cast steel. It is mounted on the back of the support 521, the support 521, which supports the shaft rotation, at least a portion of the fixed fixed shaft 522, the rear side of the support 521 is mounted to surround the fixed shaft 522 , A body 523 fixed to a predetermined frame installed to surround the moving path of the cast steel, and a plunger 524 mounted through the rear surface of the body 523 and connected to the rear end of the fixed shaft 522. .
[56]
At this time, the plunger 524 is formed so that at least a portion can move forward and backward with respect to the movement path of the cast using hydraulic pressure, the fixed shaft 522 is reversed by the plunger 524 to move the roller 510 to the cast. Can retreat from the path.
[57]
In particular, when casting a thick cast steel, if various emergencies occur, the roller 510 can be forcibly separated from the cast steel, so that subsequent maintenance and repair may be easy.
[58]
On the other hand, the directions used for the description of the embodiments below are not intended to limit the present invention. The installation direction and the extension direction of each component of the roller assembly 520 may be varied in the extending direction of the movement path and the arrangement direction of the roller.
[59]
The support 521 can support the roller 510 disposed in the movement path of the cast piece so as to be rotatable. The support 521 may be formed in various shapes in which an end of the roller 510 may be easily mounted and supported. For example, the support 521 is formed in a disk shape having one side toward the front having a diameter smaller than that of the roller 510, facing the end of the roller 510 in left and right directions, and the other side toward the rear is formed in a bar shape to have a fixed shaft. 522 may face each other in the front and back directions. The support 521 may be mounted to the center of one side of the roller 510 so as to be rotatable, and the fixed shaft 522 may be mounted on the other side of the support 521.
[60]
The fixed shaft 522 may be mounted on the rear surface of the support 521 in the front-rear direction. The fixed shaft 522 may be formed by combining a plurality of divided or separated shafts. On the other hand, when the roller 510 is in close contact with the slab to push the slab, the repulsive force due to the iron positive pressure of the slab may be transmitted to the fixed shaft 522 through the support 521 in the form of axial force. The fixed shaft 522 may be formed to be at least partially stretchable in the front-rear direction to receive and dissipate the axial force and to prevent breakage due to the axial force.
[61]
The fixed shaft 522 extends in the front-rear direction, the first shaft hole 522a mounted on the rear surface of the support 521, the first shaft hole penetrating the rear surface of the first shaft 522a, and extended in the front-rear direction, The first shaft cover 522b and the first shaft cover 522b mounted on the rear surface of the first shaft 522a are penetrated in the front-rear direction, and one side facing forward is disposed inside the first shaft hole. A ring-shaped protrusion protruding from the inner surface and protruding from the outer peripheral surface of the second shaft 552c and the second shaft 552c mounted on the other side toward the rear through the center of the rear surface of the body 523 in the front-rear direction, The second shaft is disposed in front and rear of the elastic members, for example, the plurality of cup springs 522d and the plurality of cup springs 522d, which are supported on one outer circumferential surface of the second shaft 522c in front of the ring-shaped protrusion and contact each other in the front-rear direction. Supported on one side outer circumferential surface of 522c, respectively, the first shaft hole and the ring-shaped protrusion face each other by the ring-shaped protrusion. The second shaft 552c to fix the other side of the pair of scissors washers 522e and the second shaft 552c which are in close contact with the respective surfaces and are in close contact with the plurality of cup springs 522d. It may include a snap ring (522f) mounted on the other outer peripheral surface of the.
[62]
The second shaft 522c may be mounted on the rear surface of the body 523 to restrict movement in the front and rear directions, and the first shaft 522a may be supported on the outer circumferential surface of the second shaft 522c and may move forward and backward. In this case, the first shaft hole and the plurality of cup springs 522d may guide and accommodate the forward and backward movement of the first shaft 522a. Accordingly, the fixed shaft 522 can be expanded and contracted in the front and rear direction, accommodates and dissipates the axial force, and can prevent breakage due to the axial force.
[63]
The body 523 extends in the front-rear direction, the inside may be opened toward the front, and may be mounted to surround the fixed shaft 522 on the rear side of the support 521. The body 523 may be in the shape of a square pillar, but is not particularly limited thereto. The body 523 may be spaced apart from the rear of the support 521, and a fixed shaft 522 may be installed in the body 523. The second shaft 522c of the fixed shaft 522 may be mounted and supported on the rear surface of the body 523. The fixed shaft 522 may be accommodated in the body 523, and the fixed shaft 522 may be supported on an inner surface of the body 523. The fixed shaft 522 may be disposed to penetrate the inside of the body 523 in the front-rear direction. The outer surface of the body 523 may be mounted and supported on the first frame 530a or the second frame 530b. The front end of the body 523 may be spaced a predetermined distance (d) from the back of the support 521.
[64]
The plunger 524 may be mounted through the rear surface of the body 523 and may be connected to the rear end of the fixed shaft 522. The plunger 524 may be mounted by connecting the body 523 and the fixed shaft 522. The plunger 524 may be formed so that at least a portion may move back and forth with respect to the movement path of the cast steel, and may be formed so that at least a portion may be reversed by using hydraulic pressure and the fixed shaft 522 may be retracted from the movement path of the cast steel. Can be. Hydraulic pressure may be applied to the fixed shaft 522 in the direction away from the slab through the plunger 524, whereby the fixed shaft 522 is retracted by a predetermined distance to pull the support 521 to the rear, and thus the roller 510. ) May be separated from the cast while retracting from the cast path. That is, the plunger 524 serves to separate the roller 510 from the cast.
[65]
The plunger 524 has a front end mounted on the rear surface of the body 523, and a step 524e is formed on the inner circumferential surface thereof, and a hollow outer cylinder 524a having an inner diameter at the rear end of the step 524e larger than the inner diameter of the front end. ), Mounted through the center of the outer cylinder 524a, a stepped 524f is formed on the outer circumferential surface, protruding from the front end of the inner cylinder 524b, inner cylinder 524b whose outer circumferential surface is in contact with the inner circumferential surface of the outer cylinder 524a, , A hydraulic pressure formed by a plurality of connecting shafts 524c, a step 524e, and a step 524f connected to the rear end of the fixed shaft 522, for example, the first shaft cover 522b, through the rear surface of the body 523. An inlet valve 524d mounted through the outer cylinder 524a to inject fluid into the space 524g so as to form a hydraulic pressure, and mounted to the inlet 524d and opened in an intermittent manner (not shown) C) may be further included.
[66]
The outer cylinder 524a extends in the front-rear direction and may be formed in a hollow cylinder shape. The inner cylinder 524b may be mounted to be movable in the front-rear direction through the center of the outer cylinder 524a. The inner cylinder 524b has an interior open toward the front, disposed inside the outer cylinder 524a, and the other side of the second shaft 522c may be accommodated therein. As for the outer cylinder 524a and the inner cylinder 524b, each outer peripheral surface and inner peripheral surface which face each other may contact or closely contact each other, and the hydraulic space 524g may be formed between them. On the other hand, the inclined surface may be formed on the step 524f of one side of the inner cylinder 524b in contact with the injection hole 524d to facilitate the injection of the fluid for hydraulic pressure.
[67]
The connecting shaft 524c may be formed in a bolt shape, the front end of which is mounted and fixed at the rear end of the fixed shaft 522, and the rear end is connected to the front end of the inner cylinder 524b, and interlocked with the movement of the inner cylinder 524b. Can be moved. Accordingly, the fixed shaft 522 and the inner cylinder 524b may move together in the same direction through the connecting shaft 524c.
[68]
When the fluid for the hydraulic pressure is injected, the inlet valve (not shown) may open the inlet 524d in an intermittent manner to apply the hydraulic pressure stepwise. That is, even if the hydraulic space 524g is one connected space, the hydraulic pressure can be applied stepwise, so that an appropriate amount of fluid can be dividedly supplied to the hydraulic space 524g according to the fusion state between the roller 510 and the cast steel. have.
[69]
Hereinafter, the retraction process of the roller 510 using the plunger 524 will be described.
[70]
For example, when a fluid for forming hydraulic pressure is injected into the injection hole 524d by using a grease gun, the hydraulic cylinder 524g expands and the inner cylinder 524b retreats, so that the connecting shaft 524c retreats to the fixed shaft 522. Retreat). In this case, the movement of the fixed shaft 522 may be accommodated by the first shaft hole and the plurality of cup springs 522d. When the fixed shaft 522 is retracted by the gap d between the support 521 and the body 523, the roller 510 may also be retracted by the gap d. At this time, the hydraulic pressure applied to the hydraulic space 524g for the retraction of the roller 510 can be sufficiently applied even with a portable hydraulic application device such as, for example, a grease gun. The roller 510 is forcibly spaced apart from the cast steel by the retraction of the roller 510, and the roller 510 fused to the cast steel may be separated from the cast steel. By doing so, in the situation where the cast steel and the roller 510 are fused at the time of outflow of the molten steel, the roller 510 and the cast steel can be easily separated without damaging the apparatus, and then the repair operation of the casting apparatus can be easily performed.
[71]
1 to 4, a roller separating method of a casting apparatus according to an embodiment of the present invention will be described. Roller separation method according to an embodiment of the present invention is a roller separation method for separating the roller from the cast on the moving path, the process of drawing the cast from the mold, is drawn in the mold using a plurality of segments continuously arranged along the movement path In the process of guiding the movement of the cast steel, or during the movement of the cast steel, a plurality of roller assemblies mounted on the plurality of rollers provided in the segment and formed so that at least a portion of the cast steel can move forward and backward with respect to the movement path of the cast steel. Retracting the roller supported on the roller assembly from the slab by retracting from the path.
[72]
First, the casting apparatus according to the above-described embodiment of the present invention is provided, and molten steel, such as molten steel, is injected into the mold 30, cooled by a cast steel, and drawn continuously.
[73]
Thereafter, the cast 1 passes between the first frame 530a and the second frame 530b of the segment 500 and guides the movement of the cast using the roller 510. Thereafter, when various emergency situations such as leakage of molten steel or stagnation of cast steel occur, casting is stopped. In this case, the cast may be in a stationary state or a moving state.
[74]
Thereafter, fluid is injected into the plunger 524 of the roller assembly 520 to form a hydraulic pressure, and a portion of the roller assembly 520, such as the fixed shaft 522, is retracted. As the fixed shaft 522 is retracted, the roller 510 supported by the support 521 may be retracted from the moving path of the cast steel so as to be spaced apart from the cast steel. At this time, the hydraulic pressure may be applied to the inside of the plunger 524 in an intermittent manner, and the required hydraulic pressure may be applied to work efficiently.
[75]
The above embodiment of the present invention is for the description of the present invention, not for the limitation of the present invention. It is to be noted that the configurations and manners disclosed in the above embodiments of the present invention will be modified in various forms by combining or crossing each other, and such modifications can also be regarded as the scope of the present invention. That is, the present invention will be implemented in various different forms within the scope of the claims and equivalent technical idea, and various embodiments are possible within the scope of the technical idea of ​​the present invention for those skilled in the art to which the present invention corresponds. You will understand.
Claim
[Claim 1]
A support rotatably supporting the roller disposed in the movement path of the treatment; A fixed shaft mounted to the rear surface of the support and at least partially stretchable; A body mounted to surround the fixed shaft at the rear side of the support; And a plunger connected to the body and the fixed shaft, the plunger being configured to at least partially move forward and backward with respect to the movement path.
[Claim 2]
The roller assembly of claim 1, wherein the plunger is at least partially retracted using hydraulic pressure and configured to retract the fixed shaft from the travel path.
[Claim 3]
The roller assembly of claim 1, wherein the plunger is connected to a rear end of the fixed shaft through a rear surface of the body.
[Claim 4]
The method of claim 1, wherein the plunger, a front end is mounted on the rear surface of the body, the step is formed on the inner peripheral surface, the inner diameter of the rear end of the center of the step is greater than the inner diameter of the front end; An inner cylinder mounted through the outer cylinder, having a stepped portion formed on an outer circumferential surface thereof, and having an outer circumferential surface contacting the inner circumferential surface of the outer cylinder; A connecting shaft protruding from a front end of the inner cylinder and connected to a rear end of the fixed shaft through a rear surface of the body; And an injection hole mounted through the outer cylinder to inject fluid into the hydraulic space formed by the step and the step to form hydraulic pressure.
[Claim 5]
The roller assembly of claim 4, wherein the plunger further comprises an inlet valve mounted to the inlet and open in an intermittent manner.
[Claim 6]
A casting apparatus for casting a cast using a mold, comprising: a plurality of segments continuously arranged below the mold to guide movement of the cast drawn from the mold, wherein the segment includes a movement path of the cast. A plurality of rollers spaced apart from each other so as to face each other, and continuously arranged along the movement path; And a plurality of roller assemblies mounted to the plurality of rollers, the plurality of roller assemblies being configured to at least partially move forward and backward with respect to the movement path.
[Claim 7]
The method of claim 6, wherein the segment comprises a first frame and a second frame spaced apart to face each other with the movement path therebetween, each of which is supported by a plurality of roller assemblies, the roller assembly using a hydraulic pressure And at least partly retracted and configured to retract the roller from the travel path.
[Claim 8]
The roller assembly of claim 6, wherein the roller assembly comprises: a support rotatably supporting the roller; A fixed shaft mounted to the rear surface of the support and at least partially stretchable; A body mounted to surround the fixed shaft at the rear side of the support; And a plunger mounted through the rear surface of the body and connected to a rear end of the fixed shaft, the plunger being configured to at least partially move forward and backward with respect to the movement path using hydraulic pressure.
[Claim 9]
CLAIMS 1. A roller separation method for separating a roller from a slab on a movement path, the roller separation method comprising: drawing a slab from a mold; Guiding the movement of the slab drawn from the mold using a plurality of segments continuously arranged along a movement path; During or during the movement of the cast piece, the roller assembly is retracted from the movement path by retracting the plurality of roller assemblies mounted on the plurality of rollers provided in the segment and formed so that at least a portion thereof can move forward and backward with respect to the movement path. Roller separation method comprising the; step of separating the roller supported on the cast.
[Claim 10]
The method of claim 9, wherein the separating of the roller from the cast comprises: applying a hydraulic pressure to the inside of the roller assembly to retract a portion of the roller assembly from the moving path; And retracting a roller connected to a portion of the roller assembly from the moving path.
[Claim 11]
The method of claim 10, wherein the step of separating the roller from the slab, the step of applying the hydraulic pressure to the inside of the roller assembly;