JP6214729B2 - Scarfing equipment - Google Patents

Description

  The present invention relates to a scarfing device, and more particularly to an invention for scarfing a slab.

  In general, a slab produced by a continuous casting machine is cut to a certain length, heated in a reheating furnace, and then put into a hot rolling mill to be produced as a hot rolled coil.

  Thus, slabs produced in the continuous casting process often have defects during operation, such defects include inclusions, gas contamination, bending stress due to the moving line curvature of the slab from the continuous casting machine, This is due to overcooling that occurs during continuous operation.

  In particular, in the case of medium carbon steel formed by the peritectic reaction, the degree of generation of defects is so strong that the defects tend to concentrate on the corners of the slab.

  If a product is produced as a hot-rolled coil in a rolling process, which is a subsequent process, using a slab having such a defect, a defect is also caused in the manufactured product, leading to a problem that the actual yield is reduced.

  Therefore, conventionally, in order to prevent such a problem, scarfing is performed on the surface or corner of the slab.

  That is, for the scarfing step, the operator performed scarfing on the corners of the slab while carrying the scarfing nozzle directly. However, it is difficult for operators to carry out scarfing work on a high-heat slab with a heavy-weight scarfing nozzle because of high work intensity, safety accidents, and low reliability of scarfing work. There was also.

  For this reason, a scarfing device that can scarf only four surfaces of the slab at the same time has been devised (Patent Document 1), and a scarfing device that can scarf only the corners of the slab has been devised (Patent Document 2).

  However, the existing scarfing device thinly scarves only the surface of the slab and intensively scarves only the corners of the slab, so if there is a widely distributed defect on the corners and surface of the slab, After scarfing, the surface had to be scarfed again, and there was a limit that work efficiency was reduced.

  Furthermore, since both the surface scarfing dedicated device and the square scarfing dedicated device must be provided, there is a problem that it is difficult to mount the device and productivity is lowered.

  Therefore, research on a scarfing device for solving the above-described problems is required.

US Pat. No. 5,497,976 Korean Published Patent No. 2011-0031817

  The objective of this invention is providing the scarfing apparatus which can remove the defect which generate | occur | produces on the surface and corner | angular part of a slab. In particular, it is an object of the present invention to provide a scarfing apparatus that can not only scarf the surface of a slab but also intensively scarf the corners of the slab.

  A scarfing device according to an embodiment of the present invention performs surface scarfing by injecting oxygen onto at least one surface of a slab, and changes the flow rate of oxygen injected into a corner of the slab that is one side of the slab surface. By increasing the number of the slabs, the angle scarfing of the slab can be performed simultaneously.

  In addition, a scarfing device according to an embodiment of the present invention is connected to a device body provided on a traveling path of a slab and the device body, and injects oxygen onto at least one of the upper and lower surfaces of the slab. An upper and lower surface processing unit provided for surface scarfing, and a side surface processing unit coupled to the apparatus body and provided for injecting oxygen onto at least one surface of both sides of the slab for surface scarfing. In addition, at least one of the upper and lower surface processing units and the side surface processing unit may be provided to inject oxygen so as to concentrate on the corners of the slab to scarf the corners of the slab.

  Further, the side surface processing unit of the scarfing device according to an embodiment of the present invention includes a side member coupled to the device body, a side center hole formed in a central portion of the side member, and the side member. Side edge holes provided at both ends and provided to inject oxygen at a pressure higher than that of the side center hole.

  Furthermore, the side edge hole of the scarfing device according to an embodiment of the present invention is formed in a shape in which the size of the hole increases from the center of the side member toward both ends. be able to.

  Furthermore, the side edge hole of the scarfing device according to an embodiment of the present invention is formed in a trapezoidal shape, and the inclined portion is positioned adjacent to the slab in the trapezoidal shape. it can.

  In addition, the side surface processing unit of the scarfing apparatus according to an embodiment of the present invention may further include an auxiliary nozzle member coupled to both ends of the side surface member.

  The scarfing device according to an embodiment of the present invention includes an oxygen injection unit that is formed in the upper and lower surface processing unit or the side surface processing unit and is connected to an external oxygen reservoir to inject oxygen, and an external fuel. And a fuel injection unit that is connected to the storage and injects fuel.

  A scarfing device according to an embodiment of the present invention is coupled to the upper and lower surface processing unit or the side surface processing unit, and one side portion protrudes in the slab direction from the upper and lower surface processing unit or the side surface processing unit. A gap maintaining wheel may be further included.

  Further, the upper and lower surface processing unit of the scarfing device according to one embodiment of the present invention includes an upper and lower surface member coupled to an upper portion or a lower portion of the device body, and an upper and lower surface formed at a central portion of the upper and lower surface member. A central hole and upper and lower surfaces that are located at both ends of the upper and lower surface members, are formed in a shape in which the size of the hole increases toward the outside, and are provided to inject oxygen at a higher pressure than the upper and lower surface central holes. Edge holes.

  Further, the upper and lower surface processing unit of the scarfing device according to one embodiment of the present invention includes an upper and lower surface member that is coupled to an upper portion or a lower portion of the device body and has a hollow formed therein, and a center of the upper and lower surface member. A sector in which a low-pressure gas line connected to the upper and lower surface members, a high-pressure gas line connected to both end portions of the upper and lower surface members, and an internal hollow of the upper and lower surface members are divided into a central portion and both end portions of the upper and lower surface members And a working isolation member provided to isolate and adjust the isolated spacing.

  In addition, the working isolation member of the scarfing device according to an embodiment of the present invention is provided in a working cylinder coupled to the upper and lower surface members, and a shape extended in a length direction of the upper and lower surface members, A column portion coupled to one end of the working cylinder, and at least one wall portion that is formed to extend in a direction perpendicular to the column portion and to be in close contact with the inside of the upper and lower surface members may be included. .

  In addition, the apparatus body of the scarfing apparatus according to an embodiment of the present invention includes a base frame and an upper surface member that is one of the upper and lower surface members, and the side surface processing unit that faces one side surface of the slab. A first connecting member coupled to the first side member, coupled to the base frame and provided to move up and down and left and right, and coupled to a lower surface member that is the other of the upper and lower surface members, A second connecting member coupled to the second side member of the side surface processing unit facing the other side surface and connected to the base frame so as to move up and down and left and right.

  The scarfing device of the present invention has an advantage that not only can the surface of the slab be scarfed, but also concentrated scarfing can be performed on the corners of the slab.

  Thereby, even if the defects of the slab are distributed over a wide range up to the surface and corners of the slab, the scarfing with respect to the surface and corners can be performed at the same time, and the work efficiency can be improved.

  Furthermore, it can also have the advantage that the scarfing operation | work with respect to a defect distribution which changes with steel types of a slab can be performed.

  Thus, by efficiently removing the slab defects, it is possible to prevent defects during production of the hot-rolled material using the slab and to improve the actual yield.

It is the front view which showed the scarfing apparatus of this invention. It is the front view which showed the part adjacent to the corner | angular part of a slab in the scarfing apparatus of this invention. It is the front view which showed the operation state in FIG. It is the perspective view which showed the up-and-down surface processing unit in the scarfing apparatus of this invention. It is the side view which showed the up-and-down surface processing unit in the scarfing apparatus of this invention. It is the side view which showed the clearance gap maintenance wheel in the scarfing apparatus of this invention. It is the front view which showed the operation separation member part in the scarfing apparatus of this invention. It is the front view which showed the cross section of the slab scarfed by the scarfing apparatus of this invention.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the idea of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the idea of the present invention may be reluctant to add, change, or delete other components within the scope of the same idea. Other embodiments included within the scope of the present invention and the spirit of the present invention can be easily proposed, and this is also included within the scope of the present invention.

  In addition, the same constituent elements that are functions within the scope of the same idea shown in the drawings of the embodiments will be described with the same reference numerals.

  The scarfing device according to the present invention relates to an invention for scarfing the slab M, can scarf the surface of the slab M, and performs intensive scarfing on the corner M3 of the slab. Can do.

  As a result, even if defects of the slab M are distributed over a wide range up to the surface and corners of the slab M, scarfing to the surface and corners can be performed at the same time, and work efficiency can be improved. It is possible to perform scarfing operations on various slabs M that form different defect distributions.

  In other words, the scarfing device according to one embodiment of the present invention performs scarfing of the surfaces M1 and M2 by injecting oxygen onto at least one surface M1 and M2 of the slab M, and the surfaces M1 and M2 of the slab M. By increasing the flow rate of oxygen injected into the corner M3 of the slab M, which is one side, as compared with other portions, the scarfing of the corner M3 of the slab M can be performed simultaneously.

  That is, by supplying the flow rate of oxygen injected onto the surfaces M1 and M2 of the slab M in a differential manner depending on the positions of the surfaces M1 and M2, scarfing for a portion where the flow rate of oxygen is increased is increased. At this time, the flow rate of oxygen injected to the corner M3 of the slab M, which is one side of the surfaces M1 and M2 of the slab M, is supplied more than the other parts. Thus, scarfing with respect to the corner M3 of the slab M can be performed.

  More specifically, FIG. 1 is a front view showing a scarfing device of the present invention, and FIG. 8 is a cross-sectional view of a slab M scarfed by the scarfing device of the present invention. It is the shown front view.

  4 is a perspective view showing the upper and lower surface processing unit in the scarfing apparatus of the present invention, and FIG. 5 is a side view showing the upper and lower surface processing unit in the scarfing apparatus of the present invention.

  Referring to FIGS. 1, 4, 5, and 6, a scarfing device according to an embodiment of the present invention is coupled to a device body 10 provided on a traveling path of a slab M, and the device body 10. The upper and lower surface processing unit 20 provided to inject oxygen into at least one surface of the upper and lower surfaces M1 of the slab and surface scarfing, and at least one surface of both side surfaces M2 of the slab coupled to the apparatus body 10 And a side surface processing unit 30 provided so as to inject oxygen into the surface scarf, and at least one of the upper and lower surface processing unit 20 and the side surface processing unit 30 concentrates on the corner M3 of the slab. Oxygen can be injected into the slab corner M3.

  That is, the upper and lower surfaces M1 and both side surfaces M2 of the slab can be scarfed, and the scarfing operation for the corner M3 of the slab can be simultaneously performed.

  In other words, the scarfing device of the present invention can not only provide oxygen sprayed from the upper and lower surface processing unit 20 or the side surface processing unit 30 to the upper and lower surfaces M1 or both side surfaces M2 of the slab, but also the slab. It is provided so that the oxygen injected to the corner M3 can be concentrated.

  Here, when oxygen is concentrated and injected at the corner M3 of the slab, the oxygen pressure or velocity is applied to the other portion of the slab corner M3 which is one side of the upper and lower surfaces M1 or both sides M2 of the slab. This means that the injection is performed with a larger flow rate or the flow rate of oxygen is increased with respect to other portions.

  As a result, the degree to which the corner M3 of the slab is welded is larger than that of other portions.

  For this purpose, the scarfing device of the present invention can include a device body 10, an upper and lower surface processing unit 20, and a side surface processing unit 30.

  The apparatus body 10 serves as a body provided by an upper and lower surface processing unit 20 and a side surface processing unit 30 which will be described later.

  For this, the device body 10 can be provided on a path along which the slab M travels so that the slab M can be provided, and the base frame 11, the first connecting member 12, A second connecting member 13 can be provided.

  That is, the device body 10 of the scarfing device according to an embodiment of the present invention is coupled to the base frame 11 and the upper surface member 21a which is one of the upper and lower surface members 21 and faces one side surface of the slab M. The first connecting member 12 coupled to the first side member 31a of the side processing unit 30 and linked to the base frame 11 to move up and down and left and right, and the other of the upper and lower surface members 21. It is coupled to a certain lower surface member 21b, is coupled to the second side surface member 31b of the side surface processing unit 30 facing the other side surface of the slab M, and is connected to the base frame 11 so as to move up and down and left and right. The second connecting member 13 can be included.

  Such a configuration of the apparatus body 10 is to provide an upper and lower surface processing unit 20 or a side surface processing unit 30 to be described later by adjusting the position in the width direction or thickness direction of the slab M.

  This is necessary for uniform scarfing work, and in particular, the scarfing work is performed by matching the center of the side processing unit 30 provided on the side surface of the slab M with the center of the side surface of the slab M. By performing this, the reliability of the scarfing operation for the desired corner M3 of the slab can be improved.

  Here, the base frame 11 is a portion of the basic device body 10 to which the first connecting member 12 and the second connecting member 13 are connected.

  That is, the base frame 11 can be connected to the first connecting member 12 or the second connecting member 13 in association with the upper and lower cylinders Ay. This is for driving the upper and lower surface processing unit 20 and the side surface processing unit 30 coupled to the first connecting member 12 or the second connecting member 13 so as to move in the thickness direction of the slab M. is there.

  The first connecting member 12 includes an upper surface member 21a of the upper and lower surface processing unit 20 facing the upper surface of the slab M and a first side surface member of the side surface processing unit 30 facing one side surface of the slab M. Any one of the upper and lower surface processing units 20 provided to face the upper surface of the slab M and any one provided to face one side of the slab M by being provided so as to be coupled to 31a. One side processing unit 30 can be provided to move in the thickness direction of the slab M by the upper and lower cylinders Ay, or to move in the width direction of the slab M by the left and right cylinders Ax.

  The second connecting member 13 includes a lower surface member 21b of the upper and lower surface processing unit 20 facing the lower surface of the slab M and a second side surface member of the side surface processing unit 30 facing the other side surface of the slab M. Further, the upper and lower surface processing unit 20 provided to face the lower surface of the slab M and the other side surface provided to face the other side surface of the slab M are provided. The processing unit 30 can be provided so as to be moved in the thickness direction of the slab M by the upper and lower cylinders Ay or moved in the width direction of the slab M by the left and right cylinders Ax.

  Thus, the driving force for moving the upper and lower surface processing unit 20 and the side surface processing unit 30 coupled to the first connecting member 12 or the second connecting member 13 in the thickness direction or the width direction of the slab M is as follows. Are transmitted from the upper and lower cylinders Ay and the left and right cylinders Ax.

  Here, the upper and lower cylinders Ay are coupled to the base frame 11 and move the first coupling member 12 or the second coupling member 13 in the thickness direction of the slab M, thereby The upper and lower surface processing unit 20 and the side surface processing unit 30 coupled to the connecting member 12 or the second connecting member 13 are moved in the thickness direction of the slab M.

  The left and right cylinders Ax are provided by being coupled to the first connecting member 12 or the second connecting member 13, and one end portion extending in the width direction of the slab M is connected to the upper and lower surface processing unit 20 or the By being coupled to the side surface processing unit 30, the upper and lower surface processing unit 20 or the side surface processing unit 30 is moved in the width direction of the slab M.

  The upper and lower surface processing unit 20 can play a role of scarfing the upper and lower surfaces M1 of the slab. Furthermore, by concentrating and injecting oxygen to the corner M3 of the slab, Scarfing work can also be performed.

  Therefore, the upper and lower surface processing unit 20 can provide an upper and lower surface member 21, an upper and lower surface central hole 22, and an upper and lower surface edge hole 23.

  That is, the upper and lower surface processing unit 20 of the scarfing device according to an embodiment of the present invention is formed at the upper and lower surface members 21 coupled to the upper or lower portion of the device body 10 and the central portion of the upper and lower surface members 21. The upper and lower surface central holes 22 are located at both ends of the upper and lower surface members 21 and are formed in a shape in which the size of the holes increases toward the outside. And an upper and lower surface edge hole 23 provided to be included.

  Here, the upper and lower surface members 21 collectively refer to an upper surface member 21a provided to face the upper surface of the slab M and a lower surface member 21b provided to face the lower surface of the slab M.

  The upper / lower surface member 21 serves as a body of the upper / lower surface processing unit 20 provided with the upper / lower surface central hole 22, the upper / lower surface edge hole 23, and the like.

  The upper and lower surface central hole 22 is a hole formed in a central portion of the upper and lower surface member 21 with respect to the width direction of the slab M, and is connected to a low pressure oxygen storage O3 provided to the outside by a low pressure gas line 24. Oxygen is injected to the upper and lower surfaces M1 of the slab, and the upper and lower surface central holes 22 may be provided in the form of a long hole slit or a circular hole.

  The upper and lower surface edge holes 23 are holes formed in the edge portions of the upper and lower surface members 21 with respect to the width direction of the slab M. The upper and lower surface edge holes 23 include a high-pressure oxygen reservoir O2 and a high-pressure gas line 25 provided outside. It is connected, and oxygen is injected to the corner M3 of the slab. That is, the upper and lower surface edge holes 23 are portions for injecting oxygen into the corner M3 portion of the slab, and can inject oxygen at a higher pressure than oxygen injected from the upper and lower surface central holes 22.

  As described above, when the upper and lower edge holes 23 inject high-pressure oxygen into the corner M3 portion of the slab, more heat is generated as compared with the central portion of the slab M. Since many scarfing phenomena occur, the scarfing operation on the corner M3 of the slab can be performed.

  The upper and lower surface center holes 22 and the upper and lower surface edge holes 23 are formed on an inclined surface facing the slab M of the upper and lower surface member 21, as shown in FIGS. Can do. Thereby, after the oxygen, fuel, etc. which are injected into the slab M collide with the slab M and scarf, they can be made to flow so as not to hit the upper and lower surface members 21.

  The side surface processing unit 30 can play a role of scarfing both sides M2 of the slab, and further, by concentrating and injecting oxygen to the corner M3 of the slab, the scarf for the corner M3 of the slab. Can also be performed.

  For this reason, the side surface processing unit 30 can provide the side surface member 31, the side surface center hole 32, and the side surface edge hole 33.

  That is, the side surface processing unit 30 of the scarfing device according to one embodiment of the present invention includes a side surface member 31 coupled to the device body 10, and a side surface central hole 32 formed at a central portion of the side surface member 31. And side edge holes 33 provided at both ends of the side member 31 and provided to inject oxygen at a pressure higher than that of the side central hole 32.

  Here, the side member 31 includes a first side member 31a provided to face one side of the slab M, and a second side member 31b provided to face the other side of the slab M. Are collectively referred to.

  The side member 31 serves as a body of the side processing unit 30 provided with the side central hole 32, the side edge hole 33, and the like.

  The side surface center hole 32 is a hole formed in a central portion of the side surface member 31 with respect to the thickness direction of the slab M, and is connected to an oxygen reservoir provided outside to be out of both side surfaces M2 of the slab. Oxygen is injected to at least one surface, and the side central hole 32 may be provided as a long hole slit shape or a circular hole.

  The side edge hole 33 is a hole formed in the edge portion of the side member 31 with respect to the thickness direction of the slab M. The side edge hole 33 is connected to an oxygen reservoir provided outside and is connected to the corner M3 of the slab. Oxygen is injected.

  That is, the side edge hole 33 is a portion for injecting oxygen into the corner M3 portion of the slab, and is connected to the oxygen reservoir O2 having a pressure higher than that of oxygen injected from the side surface central hole 32. By injecting oxygen having a pressure higher than that of oxygen injected from the slab, it is possible to provide scarfing for the corner M3 of the slab.

  As described above, when the side edge hole 33 injects high-pressure oxygen to the corner M3 portion of the slab, more heat is generated as compared with the central portion of the slab M, and thus more heat is generated. Since the scarfing phenomenon occurs, the scarfing operation on the corner M3 of the slab can be performed.

  However, the slab corner M3 may be connected to the high-pressure oxygen storage O2 to carry out a scarfing operation. However, the side edge hole 33 may be provided in a specific shape to provide a corner of the slab. You may perform the scarfing operation | work with respect to M3. A detailed description thereof will be described later with reference to FIGS.

  Further, in the side surface processing unit 30, the side surface center hole 32 and the side surface edge hole 33 face the slab M of the side surface member 31 in the same manner as the upper and lower surface processing unit 20 shown in FIGS. 4 and 5. It can be formed on a tilted surface. Thereby, after the oxygen, fuel, etc. which are injected into the slab M collide with the slab M and scarf, they can be made to flow so as not to collide with the side member 31.

  On the other hand, a result obtained by performing scarfing work on the surface and corners of the slab M by the upper and lower surface processing unit 20 and the side surface processing unit 30 is shown in FIG.

  Here, the cross section of the slab M presented in FIG. 8A is a result obtained by performing only the scarfing operation on both side surfaces M2 of the slab. That is, the result of injecting oxygen only from the side central hole 32 of the side processing unit 30 is shown.

  Further, the cross section of the slab M presented in FIG. 8B is a result obtained by performing only the scarfing operation on the both side surfaces M2 of the slab and the scarfing operation on the corner M3. That is, oxygen is injected only from the side surface central hole 32 and the side surface edge hole 33 of the side surface processing unit 30 or from only the side surface central hole 32 of the side surface processing unit 30 and the upper and lower surface edge holes 23 of the upper and lower surface processing unit 20. The result of injecting oxygen is shown.

  Then, the cross section of the slab M presented in FIG. 8C is a result obtained by performing only the scarfing operation on the both side surfaces M2 and the upper and lower surfaces M1 of the slab. That is, a result of injecting oxygen from only the side surface center hole 32 of the side surface processing unit 30 and the upper and lower surface center holes 22 of the upper and lower surface processing unit 20 is shown.

  In particular, the cross section of the slab M presented in FIG. 8D is a result of the scarfing work for both the side surfaces M2 and the upper and lower surfaces M1 and the scarfing work for the corner M3 of the slab. That is, oxygen is injected from the side surface central hole 32, the side surface edge hole 33, and the upper and lower surface central hole 22 of the upper and lower surface processing unit 20, or the side surface central hole 32 of the side surface processing unit 30 and the upper surface Oxygen is injected from the upper and lower surface center holes 22 and the upper and lower surface edge holes 23 of the lower surface processing unit 20, or the side surface central holes 32 and the side edge holes 33 of the side surface processing unit 30 and the upper and lower surfaces of the upper and lower surface processing unit 20. The result of injecting oxygen from all of the center hole 22 and the upper and lower surface edge holes 23 is shown.

  Furthermore, the scarfing apparatus of the present invention not only shortens the preheating time in hot rolling after the scarfing work by preheating the slab M, but also shortens the time during the scarfing work. Will be able to.

  Therefore, the scarfing device according to an embodiment of the present invention is formed in the upper and lower surface processing unit 20 or the side surface processing unit 30 and is connected to the external preheating oxygen reservoir O1 to inject oxygen to be injected. And a preheating unit 40 that includes a fuel injection unit 42 that is connected to an external fuel storage F and injects fuel.

  That is, by the heat generated by the oxidation reaction of the oxygen injected from the oxygen injection unit 41 connected to the external preheating oxygen storage O1 and the fuel injected from the fuel injection unit 42 connected to the external fuel storage F. The preheating of the slab M can be performed.

  FIG. 2 is a front view showing a portion adjacent to the corner M3 portion of the slab in the scarfing device of the present invention, and FIG. 3 is a front view showing an operating state in FIG.

  2 and 3, the side edge hole 33 of the scarfing device according to one embodiment of the present invention has a shape in which the size of the hole increases from the center of the side member 31 toward both ends. It is characterized by being formed.

  In addition, the side edge hole 33 of the scarfing device according to an embodiment of the present invention is formed in a trapezoidal shape, and the diagonal line segment is positioned adjacent to the slab M in the trapezoidal shape. can do.

  That is, the shape of the side edge hole 33 is provided in a specific shape so that the scarfing operation can be performed on the corner M3 of the slab.

  In other words, the side edge hole 33 can be formed and provided in such a form that oxygen can be supplied to the corner M3 portion of the slab more intensively than the central portion of the slab M.

  More specifically, since the size of the hole is provided so as to increase from the central portion of the side member 31 to both ends, the width of the hole may be gradually increased. As an example, an asymmetric trapezoidal shape may be provided.

  As described above, it can be determined that oxygen having a higher flow rate is supplied to the corner M3 portion of the slab than the central portion of the slab M, as described above. In addition, the same effect as supplying high-pressure oxygen can be obtained.

  However, the side edge hole 33 is not limited to the above-described form as long as oxygen can be supplied more concentratedly to the corner M3 portion of the slab than to the center portion of the slab M. Also, it can be realized by various shapes and arrangements.

  In addition, the side surface processing unit 30 of the scarfing apparatus according to an embodiment of the present invention may further include an auxiliary nozzle member 34 coupled to both ends of the side surface member 31.

  That is, the auxiliary nozzle member 34 may be further provided to supply the corner M3 portion of the slab with a higher flow rate of oxygen or higher pressure oxygen than the central portion of the slab M.

  In other words, in addition to oxygen injected from the side edge hole 33, oxygen injected from the auxiliary nozzle member 34 is also injected into the corner M3 portion of the slab, thereby scarfing the corner M3 portion of the slab. Will also be able to do.

  FIG. 6 is a side view showing a gap maintaining wheel in the scarfing device of the present invention. Referring to this, the scarfing device according to one embodiment of the present invention is the above-described upper and lower surface processing unit 20 or the above-mentioned side surface processing. It may further include a gap maintaining wheel 50 that is coupled to the unit 30 and is provided such that one side portion protrudes in the slab M direction from the upper and lower surface processing unit 20 or the side surface processing unit 30.

  That is, the gap maintaining wheel 50 is provided so that the slab M and the upper and lower surface processing unit 20 or the side surface processing unit 30 can be prevented from colliding with each other by maintaining a certain distance. .

  In other words, the gap maintaining wheel 50 is provided so as to protrude closer to the slab M than the upper and lower surface processing unit 20 or the side surface processing unit 30, so that the slab M and the upper and lower surface processing unit 20 or A collision with the side surface processing unit 30 is prevented.

  Therefore, the gap maintaining wheel 50 can be provided in combination with the upper and lower surface processing unit 20 or the side surface processing unit 30 and is provided to be rotatable to reduce friction with the slab M. Can be offered.

  FIG. 7 is a front view showing the working isolation member 26 portion in the scarfing device of the present invention. Referring to this, the upper and lower surface processing unit 20 of the scarfing device according to one embodiment of the present invention is as follows. An upper and lower surface member 21 coupled to the upper or lower portion of the apparatus body 10 and having a hollow formed therein, a low-pressure gas line 24 connected to a central portion of the upper and lower surface member 21, and both ends of the upper and lower surface member 21 The high-pressure gas line 25 connected to the upper part and the inner hollow of the upper and lower surface member 21 are separated by a sector divided into the central part and both end parts of the upper and lower surface member 21 so as to adjust the separation distance. And a working isolation member 26 provided.

  In other words, a configuration in which a portion where high-pressure oxygen is injected can be changed so that high-pressure oxygen can be injected to the slab corner M3 with respect to the slab M having various widths.

  In other words, since the width of the slab M that is the target of the scarfing work is not always the same, the slab M is configured so that the portion that injects high-pressure oxygen can be changed according to the changed width of the slab M. The upper and lower surface members 21, the low-pressure gas line 24, the high-pressure gas line 25, and the operation isolation member 26 are provided so that the scarfing operation for the corner M3 is performed.

  Here, as described above, the upper and lower surface member 21 is a body portion of the upper and lower surface processing unit 20 coupled to the upper or lower portion of the apparatus body 10.

  The low-pressure gas line 24 is configured to be connected to the low-pressure oxygen reservoir O3 so as to inject low-pressure oxygen into the slab M, and is provided to be connected to the central portion of the upper and lower surface members 21.

  The high-pressure gas line 25 is configured to be connected to the high-pressure oxygen reservoir O <b> 2 so that high-pressure oxygen can be injected into the slab M, and is connected to both ends of the upper and lower surface members 21.

  The operation isolation member 26 serves to change the region of high-pressure oxygen injected into the slab M.

  In other words, the operation isolation member 26 is provided to move in the inner hollow portion of the upper and lower surface member 21 so that the regions of both end portions of the upper and lower surface member 21 to which the high pressure gas line 25 is connected can be adjusted. It is a member.

  More specifically, the working isolation member 26 of the scarfing device according to an embodiment of the present invention is extended in the length direction of the working cylinder 26 a coupled to the upper and lower surface member 21 and the upper and lower surface member 21. A column 26b that is coupled to one end of the working cylinder 26a, and is formed to extend in a direction perpendicular to the column 26b so as to be in close contact with the inside of the upper and lower surface member 21. One wall portion 26c.

  In other words, the column 26b is moved in the length direction of the upper and lower surface member 21 while the working cylinder 26a coupled to the upper and lower surface member 21 is expanded and contracted, and the direction perpendicular to the column 26b. As a result of the final movement of the wall portion 26c that is formed in the upper and lower surface members 21 and isolates a partial region of the inner hollow portion of the upper and lower surface members 21, the region of the upper and lower surface members 21 where high-pressure oxygen is provided is reduced. You can change it.

  Further, a plurality of the wall portions 26c may be provided to form a plurality of regions to be isolated, thereby adjusting the degree of scarfing with respect to the slab M in cooperation with the oxygen reservoirs of various pressures. May be provided as follows.

DESCRIPTION OF SYMBOLS 10 Apparatus body 11 Base frame 12 1st connection member 13 2nd connection member 20 Upper-lower surface processing unit 21 Upper-lower surface member 22 Upper-lower surface center hole 23 Upper-lower surface edge hole 24 Low-pressure gas line 25 High-pressure gas line 26 Operation isolation member 30 Side treatment unit 31 Side member 32 Side central hole 33 Side edge hole 34 Auxiliary nozzle member 40 Preheating unit 41 Oxygen injection part 42 Fuel injection part 50 Gap maintaining wheel

Claims (10)

A device body provided on the path of travel of the slab;
An upper and lower surface processing unit coupled to the apparatus body and provided to inject oxygen into at least one of the upper and lower surfaces of the slab to perform surface scarfing;
A side treatment unit coupled to the apparatus body and provided to inject oxygen into at least one of both side surfaces of the slab to perform surface scarfing;
Including
At least one of the upper and lower surface processing unit and the side surface processing unit is provided to inject oxygen so as to concentrate on the corner of the slab and scarf the corner of the slab ,
The upper and lower surface processing unit is
Upper and lower surface members coupled to the upper or lower portion of the device body and having a hollow formed therein,
A low-pressure gas line connected to a central portion of the upper and lower surface members;
A high-pressure gas line connected to both ends of the upper and lower surface members;
An operating isolation member provided to isolate the internal hollow of the upper and lower surface members by a sector divided into a central portion and both end portions of the upper and lower surface members, and to adjust an isolated interval;
A scarfing device. The side surface processing unit includes:
A side member coupled to the device body;
A side center hole formed in the center of the side member;
Side edge holes located at both ends of the side member and provided to inject oxygen at a higher pressure than the side center hole;
The scarfing device according to claim 1 , comprising: 3. The scarfing apparatus according to claim 2 , wherein the side edge hole is formed in a shape in which the size of the hole increases from the center of the side member toward both ends. The scarfing device according to claim 3 , wherein the side edge hole is formed in a trapezoidal shape, and the inclined portion is positioned adjacent to the slab in the trapezoidal shape. The side surface processing unit includes:
The scarfing apparatus according to claim 2 , further comprising an auxiliary nozzle member coupled to both ends of the side member. An oxygen injection unit that is formed in the upper and lower surface processing unit or the side surface processing unit and is connected to an external oxygen storage to inject oxygen; and a fuel injection unit that is connected to an external fuel storage and injects fuel; further comprising a preheating unit is provided, scarfing apparatus of claim 1. It further includes a gap maintaining wheel coupled to the upper and lower surface processing unit or the side surface processing unit and provided so that one side portion protrudes in the direction of the slab from the upper and lower surface processing unit or the side surface processing unit. The scarfing device according to 1. The upper and lower surface processing unit is
Upper and lower surface members coupled to the upper or lower portion of the device body;
An upper and lower surface central hole formed in a central portion of the upper and lower surface members;
Upper and lower surface edge holes located at both ends of the upper and lower surface members, formed in a shape in which the size of the hole increases toward the outside, and provided to inject oxygen at a higher pressure than the upper and lower surface central holes,
The scarfing device according to claim 1 , comprising: The operating isolation member is
An operating cylinder coupled to the upper and lower surface members;
A pillar portion provided in a shape extending in a length direction of the upper and lower surface members, and coupled to one end portion of the working cylinder;
At least one wall provided to extend in a direction perpendicular to the pillar and to be in close contact with the inside of the upper and lower surface members;
The scarfing device according to claim 1 , comprising: The device body is
A base frame,
The upper surface member that is one of the upper and lower surface members is coupled to the first side surface member of the side surface processing unit that faces one side surface of the slab, and is linked to the base frame so as to move up and down and left and right. A first connecting member provided in
It is combined with the lower surface member, which is the other of the upper and lower surface members, is connected with the second side surface member of the side surface processing unit facing the other side surface of the slab, and moves up and down and left and right in conjunction with the base frame. A second connecting member provided in
The scarfing device according to claim 1 , comprising:

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