Side guide device, hot rolling equipment, and side guide cooling method

Abstract

To provide a side guide device, a hot rolling facility, and a side guide cooling method with which abnormality detection can be easily conducted when cooling failure of a side guide occurs.SOLUTION: A side guide device includes a pair of side guides that are arranged on both sides in a width direction of a rolled material being conveyed and subjected to hot rolling. The side guide includes: a side guide body part having a hollow interior; a supply pipe for supplying cooling liquid to the hollow interior; a lower discharge pipe for discharging the cooling liquid from the hollow interior; and a first upper discharge pipe with a first upper discharge port for discharging the cooling liquid from the hollow interior. At normal times, an amount of discharge of the cooling liquid discharged from the lower discharge pipe is adjusted so that the cooling liquid supplied from the supply pipe to the hollow interior of the side guide is discharged through the lower discharge pipe and the first upper discharge port. However, when a first abnormality occurs where an amount of supply of the cooling liquid supplied from the supply pipe is smaller than at the normal times, the cooling liquid is not discharged from the first upper discharge port.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a side guide device, a hot rolling facility, and a method for cooling a side guide. [Background technology]

[0002] Patent Document 1 discloses a technology in which a pair of side guides are placed on each of the upstream and downstream sides of a rolling mill, and the side surfaces of the structural steel, which is the material to be rolled that is transported from a heating furnace to the rolling mill and rolled, are held by the pair of side guides, thereby guiding the widthwise position of the material to be rolled. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-52101 Summary of the Invention [Problem to be solved by the invention]

[0004] Side guides are required to be lightweight as well as strong and rigid. Therefore, they often have a hollow box-shaped cross-section. Furthermore, because the side guides position the structural steel by sandwiching it, the side guides are in contact with the structural steel for a long time. Because the structural steel is heated to high temperatures, for example, above 1000°C, heat is transferred from the structural steel to the side guides. Therefore, the side guides are typically cooled from the inside by supplying cooling water to their hollow interiors. Cooling water is supplied from the top of the side guide via hoses or pipes and drained through drainage pipes connected to the bottom of the side guides. However, if there is an abnormality in the supply of cooling water to the hollow interior of the side guide or an abnormality in the discharge of cooling water from the hollow interior of the side guide, the side guides may be insufficiently cooled. Such insufficient cooling of the side guides may result in, for example, seizure between a liner attached to one surface of the main body of the side guide and the main body.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a side guide device, hot rolling equipment, and a side guide cooling method that can easily detect abnormalities when poor cooling of the side guide occurs. [Means for solving the problem]

[0006] In order to solve the above problems and achieve the objectives, [1] A side guide device according to the present invention is a side guide device comprising a pair of side guides arranged on both sides in the width direction of a rolled material to be transported and hot rolled, wherein the side guides comprise: a side guide body having a hollow interior; a supply pipe connected to the side guide body so as to communicate with the hollow interior and for supplying a cooling liquid to the hollow interior; a lower discharge pipe connected to the underside of the side guide body so as to communicate with the hollow interior and for discharging the cooling liquid from the hollow interior; and a first upper discharge pipe connected to the upper surface of the side guide body so as to communicate with the hollow interior and having a first upper discharge port for discharging the cooling liquid from the hollow interior, wherein the discharge amount of the cooling liquid discharged from the lower discharge pipe is adjusted so that the cooling liquid supplied from the supply pipe to the hollow interior is normally discharged from the lower discharge pipe and the first upper discharge port, The cooling liquid is not discharged from the first upper outlet, and an operator can visually confirm that a first abnormality has occurred in which the amount of the cooling liquid supplied from the supply pipe is less than that in the normal state. When the first abnormality occurs, the coolant is not discharged from the first upper discharge port. Yes The present invention is characterized by the above-mentioned configuration.

[0007] [2] The side guide device according to the present invention is the invention [1] above, wherein the side guide is connected to the upper surface of the side guide body portion so as to communicate with the hollow interior, and is provided with a second upper discharge pipe having a second upper discharge port for discharging the cooling liquid from the hollow interior, the second upper discharge port being disposed above the first upper discharge port; The aforementioned an amount of the cooling liquid discharged from the lower discharge pipe is adjusted so that the cooling liquid supplied from the supply pipe to the hollow interior is not discharged from the second upper discharge port under normal circumstances; The operator visually checks that the cooling liquid is being discharged from the second upper discharge port and determines that a second abnormality has occurred in which the amount of the cooling liquid discharged from the lower discharge pipe is less than that in the normal state. When a second abnormality occurs, the coolant is discharged from the second upper discharge port. I'll The present invention is characterized by the above-mentioned configuration.

[0008] [3] The side guide device according to the present invention is characterized in that, in the invention [1] or [2] above, it has an adjustment valve provided in the lower discharge pipe for adjusting the discharge amount of the cooling liquid discharged from the lower discharge pipe.

[0009] [4] The side guide device of the present invention is characterized in that, in the invention [1] above, it has a liner provided on the surface of the side guide main body facing the rolled material, and the first upper discharge port is positioned so that the cooling liquid is discharged toward the liner.

[0010] [5] The side guide device of the present invention is characterized in that, in the invention [2] above, it has a liner provided on the surface of the side guide main body facing the rolled material, and at least one of the first upper discharge outlet and the second upper discharge outlet is positioned so that the cooling liquid is discharged toward the liner.

[0011] [6] The hot rolling equipment according to the present invention includes a rolling mill that rolls a material to be rolled heated in a heating furnace; The side guide device according to any one of the above inventions [1] to [5] is provided at least on either the upstream side or downstream side of the rolling mill in the conveying direction of the material to be rolled from the heating furnace to the rolling mill.

[0012] [7] A cooling method for side guides according to the present invention is a cooling method for a pair of side guides arranged on both sides in the width direction of a material to be rolled, which is transported from a heating furnace to a rolling mill and rolled, wherein the side guides comprise: a side guide body having a hollow interior; a supply pipe connected to the side guide body so as to communicate with the hollow interior and for supplying a cooling liquid to the hollow interior; a lower discharge pipe connected to the underside of the side guide body so as to communicate with the hollow interior and for discharging the cooling liquid from the hollow interior; and a first upper discharge pipe connected to the upper surface of the side guide body so as to communicate with the hollow interior and having a first upper discharge port for discharging the cooling liquid from the hollow interior, and wherein the discharge amount of the cooling liquid discharged from the lower discharge pipe is adjusted so that the cooling liquid supplied from the supply pipe to the hollow interior is normally discharged from the lower discharge pipe and the first upper discharge port, The cooling liquid is not discharged from the first upper outlet, and an operator can visually confirm that a first abnormality has occurred in which the amount of the cooling liquid supplied from the supply pipe is less than that in the normal state. When a first abnormality occurs, the coolant is not discharged from the first upper discharge port. The side guide is configured as follows. It is characterized by the following.

[0013] [8] The cooling method for a side guide according to the present invention is the invention [7] above, wherein the side guide is provided with a second upper discharge pipe connected to the upper surface of the side guide main body portion so as to communicate with the hollow interior, the second upper discharge pipe having a second upper discharge port for discharging the cooling liquid from the hollow interior, the second upper discharge port being disposed above the first upper discharge port; The aforementioned adjusting the discharge amount of the cooling liquid discharged from the lower discharge pipe so that the cooling liquid supplied from the supply pipe to the hollow interior is not discharged from the second upper discharge port under normal conditions; The operator visually checks that the cooling liquid is being discharged from the second upper discharge port and determines that a second abnormality has occurred in which the amount of the cooling liquid discharged from the lower discharge pipe is less than that in the normal state. When a second abnormality occurs, the coolant is discharged from the second upper discharge port. I'll sea ​​urchin The side guide composition It has been It is characterized by the following.

[0014] [9] The cooling method for a side guide according to the present invention is characterized in that, in the inventions [7] or [8] above, the discharge amount of the cooling liquid discharged from the lower discharge pipe is adjusted by an adjustment valve provided in the lower discharge pipe connected to the underside of the side guide main body so as to communicate with the hollow interior.

[0015]

[10] The cooling method for a side guide according to the present invention is characterized in that, in the invention [7] above, the cooling liquid is discharged from the first upper discharge port toward a liner provided on the surface of the side guide main body facing the rolled material.

[0016]

[11] The cooling method for a side guide according to the present invention is characterized in that, in the invention [8] above, the cooling liquid is discharged from at least one of the first upper discharge outlet and the second upper discharge outlet toward a liner provided on the surface of the side guide main body facing the rolled material. [Effects of the Invention]

[0017] The side guide device, hot rolling equipment, and side guide cooling method according to the present invention have the advantage of being able to easily detect abnormalities when poor cooling of the side guide occurs. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a section steel rolling line according to an embodiment. [Figure 2] FIG. 2 is a diagram partially showing the equipment configuration of the hot rolling equipment according to the embodiment. [Figure 3] FIG. 3 is a cross-sectional view of a side guide according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view of a side guide of a comparative example. [Figure 5] FIG. 5 is a diagram showing the cooling problem in the side guide of the comparative example. [Figure 6]FIG. 6 is a cross-sectional view of the side guide when the second abnormality occurs. [Figure 7] FIG. 7 is a cross-sectional view of the side guide during clogging removal. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the side guide device, hot rolling equipment, and side guide cooling method according to the present invention will be described, but the present invention is not limited to these embodiments.

[0020] FIG. 1 is a diagram showing a partial schematic configuration of a section steel rolling line 100 according to an embodiment.

[0021] The shaped steel rolling line 100 according to the embodiment is a facility for manufacturing shaped steel, and includes, in order from the upstream side to the downstream side of the conveyor table 6, a heating furnace 1, a roughing mill 3, an intermediate rolling mill (not shown), a finishing rolling mill (not shown), and a hot saw (not shown). A material to be rolled 2 such as a slab heated to a predetermined temperature (for example, 1200°C to 1300°C) in the heating furnace 1 is hot caliber rolled using a plurality of calibers in the order of the roughing mill 3, the intermediate rolling mill, and the finishing rolling mill. The material to be rolled 2 means, for example, a steel material to be rolled when manufacturing shaped steel.

[0022] The conveying table 6 is provided with a plurality of conveying rollers arranged along the conveying direction, and the plurality of conveying rollers support the rolled material 2 from below, enabling the rolled material 2 to be conveyed in the longitudinal direction.

[0023] The roughing mill 3 shapes the material 2 to be rolled, which has been heated in the heating furnace 1, by groove rolling so as to approximate the target cross-sectional shape. The roughing mill 3 is equipped with upper and lower rolls on which one or more grooves, also called calibers, are engraved along the roll axis direction, and the material 2 to be rolled is rolled multiple times with the grooves.

[0024] In addition, in the section steel rolling line 100, a pair of entrance-side side guides 4A and a pair of exit-side side guides 4B are arranged on the entrance side (upstream side in the conveying direction) and exit side (downstream side in the conveying direction) of the roughing mill 3, respectively, in the conveying direction of the rolled material 2 from the heating furnace 1 to the roughing mill 3. The pair of entrance-side side guides 4A are arranged on both sides in the width direction of the rolled material 2 placed on the conveying table 6 and conveyed, and are arranged opposite each other with the rolled material 2 sandwiched between them. The pair of exit-side side guides 4B are arranged on both sides in the width direction of the rolled material 2 placed on the conveying table 6 and conveyed, and are arranged opposite each other with the rolled material 2 sandwiched between them. The pair of entrance-side side guides 4A and the pair of exit-side side guides 4B are arranged so that their positions can be changed in the width direction perpendicular to the conveying direction of the rolled material 2. In the following description, unless otherwise specified, the "width direction" refers to the width direction perpendicular to the conveying direction of the rolled material 2.

[0025] The widthwise positions of the pair of entrance side guides 4A and the pair of exit side guides 4B are changed depending on the type and size of the material 2 to be rolled transported by the transport table 6, and the material 2 to be rolled is guided by the entrance side guide 4A and the pair of exit side guides 4B so that its widthwise position matches one of the grooves during rolling. In the following description, when there is no need to distinguish between the pair of entrance side guides 4A and the pair of exit side guides 4B, they will also be referred to simply as side guides 4.

[0026] FIG. 2 is a diagram partially showing the equipment configuration of the hot rolling equipment 120 according to the embodiment.

[0027] In the shaped steel rolling line 100 according to the embodiment, an entrance-side side guide device 110A is configured with at least a pair of entrance-side side guides 4A and an entrance-side position adjustment mechanism 5A. In addition, in the shaped steel rolling line 100 according to the embodiment, an exit-side side guide device 110B is configured with at least a pair of exit-side side guides 4B and an exit-side position adjustment mechanism 5B.

[0028] The entrance-side position adjustment mechanism 5A and the exit-side position adjustment mechanism 5B adjust the widthwise positions of the pair of entrance-side side guides 4A and the pair of exit-side side guides 4B, respectively. The entrance-side position adjustment mechanism 5A and the exit-side position adjustment mechanism 5B include drive motors 51A and 51B, speed reduction mechanisms 52A and 52B, multiple pinion gears 53A and 53B, and multiple rack gears 54A and 54B. The speed reduction mechanisms 52A and 52B are connected to the rotation shafts of the drive motors 51A and 51B. The pinion gears 53A and 53B are connected to the output shafts of the speed reduction mechanisms 52A and 52B. The pinion gears 53A and 53B are meshed with the rack gears 54A and 54B, respectively. The entrance-side side guides 4A and the exit-side side guides 4B are fixed to the rack gears 54A and 54B, respectively. The drive motors 51A, 51B are connected to a motor control device (not shown). The motor control device controls the drive of the drive motors 51A, 51B in response to signals from an operating device (not shown), thereby moving the rack gears 54A, 54B in the width direction. The pair of entrance-side side guides 4A and the pair of exit-side side guides 4B move in the width direction in conjunction with the movement of the rack gears 54A, 54B, and their positions in the width direction are adjusted.

[0029] In the section steel rolling line 100 according to the embodiment, a hot rolling facility 120 for rolling a material 2 heated in a heating furnace 1 is constituted by at least a roughing mill 3, an entrance-side side guide device 110A, and an exit-side side guide device 110B. In the entrance-side side guide device 110A and the exit-side side guide device 110B, a pair of entrance-side side guides 4A and a pair of exit-side side guides 4B have a hollow box-shaped cross-section structure, and a plurality of hollow interiors 40A, 40B are formed, separated by a plurality of partition walls. In addition, the pair of entrance-side side guides 4A and the pair of exit-side side guides 4B are provided with supply pipes 42A, 42B, first upper discharge pipes 45A, 45B, second upper discharge pipes 46A, 46B, and a lower discharge pipe (described later) corresponding to the plurality of hollow interiors 40A, 40B. The cooling water discharged from the first upper discharge pipes 45A, 45B, the second upper discharge pipes 46A, 46B, and the lower discharge pipe is collected, for example, in a drainage ditch (not shown) provided below the conveying table 6 and flows into a drainage facility (not shown).

[0030] 3 is a cross-sectional view of the side guide 4 according to the embodiment, taken along the line AA in FIG.

[0031] The side guide 4 has a side guide main body 41 and a liner 47. The side guide main body 41 has a hollow box-shaped cross-section structure that defines a hollow interior 40 surrounded by an upper wall 41a, a lower wall 41b, an inner wall 41c, and an outer wall 41d. The upper wall 41a forms the upper wall in the height direction of the side guide main body 41. The lower wall 41b is the lower wall in the height direction of the side guide main body 41. The inner wall 41c forms the inner wall that faces the rolled material 2 in the width direction of the side guide main body 41. The outer wall 41d forms the outer wall that does not face the rolled material 2 in the width direction of the side guide main body 41. The side guide main body 41 has a hollow box-shaped cross-section structure that increases strength and rigidity while reducing weight. A liner 47 that slides against the material 2 to be rolled is fastened and attached to the surface of the inner wall 41c of the side guide body 41 that faces the material 2 to be rolled by fastening members such as bolts.

[0032] A supply pipe 42 for supplying cooling water, which is a coolant, to the hollow interior 40 of the side guide main body 41 is connected to the upper surface of the upper wall 41a so as to communicate with the hollow interior 40. In this embodiment, the supply pipe 42 is connected to the upper wall 41a of the side guide main body 41, but the connection position of the supply pipe 42 to the side guide main body 41 is not limited to the upper wall 41a. A lower discharge pipe 43 for discharging cooling water from the hollow interior 40 of the side guide main body 41 is connected to the lower surface of the lower wall 41b so as to communicate with the hollow interior 40. In addition, an adjustment valve 44 is provided on the lower discharge pipe 43 to adjust the amount of cooling water discharged from the lower discharge pipe 43. The adjustment valve 44 can adjust the amount of cooling water discharged from the lower discharge pipe 43 by changing its opening degree.

[0033] Additionally, a first upper discharge pipe 45 and a second upper discharge pipe 46, which are multiple upper discharge pipes for discharging cooling water from the hollow interior 40 of the side guide main body 41, are connected to the upper surface of the upper wall 41a. The first upper discharge pipe 45 and the second upper discharge pipe 46 have a first upper discharge port 451 and a second upper discharge port 461 that are positioned at different heights above the upper wall 41a. The second upper discharge port 461 of the second upper discharge pipe 46 is positioned higher than the first upper discharge port 451 of the first upper discharge pipe 45. The first upper discharge port 451 and the second upper discharge port 461 are positioned so that the cooling water is discharged toward the liner 47. The liner 47 is cooled by the cooling water discharged from the first upper discharge port 451 and the second upper discharge port 461. Note that the positioning of the cooling water to be discharged toward the liner 47 does not necessarily have to be from both the first upper discharge port 451 and the second upper discharge port 461. That is, at least one of the first upper discharge port 451 and the second upper discharge port 461 may be disposed so that the cooling water is discharged toward the liner 47. In this case, it is preferable to dispose at least the first upper discharge port 451 so that the cooling water is discharged toward the liner 47. In addition, in this embodiment, the first upper discharge port 451 and the second upper discharge port 461 are provided separately in different upper discharge pipes, that is, the first upper discharge pipe 45 and the second upper discharge pipe 46, but this is not limited to this. For example, the first upper discharge port 451 and the second upper discharge port 461 may be provided in a single upper discharge pipe such that the second upper discharge port 461 is disposed above the first upper discharge port 451.

[0034] The hollow interior 40 of the side guide main body 41 is filled with cooling water supplied from a supply pipe 42. The side guide 4 is cooled from the inside of the side guide main body 41 by the cooling water supplied to the hollow interior 40.

[0035] The amount of cooling water discharged from the lower discharge pipe 43 is adjusted by the adjustment valve 44 so that it is less than the amount of cooling water supplied from the supply pipe 42 to the hollow interior 40, and so that cooling water is discharged from the first upper discharge port 451 but not from the second upper discharge port 461. That is, in the side guide 4 according to the embodiment, under normal conditions, cooling water supplied from the supply pipe 42 to the hollow interior 40 is discharged from the lower discharge pipe 43 and the first upper discharge port 451 but not from the second upper discharge port 461. Note that the adjustment valve 44 does not need to be provided as long as cooling water can be discharged from the lower discharge pipe 43 so as to satisfy the relationship under normal conditions that cooling water supplied from the supply pipe 42 to the hollow interior 40 is discharged from the lower discharge pipe 43 and the first upper discharge port 451 but not from the second upper discharge port 461. For example, the inner diameter of the lower discharge pipe 43 can be set to adjust the amount of cooling water discharged from the lower discharge pipe 43 so as to satisfy the relationship that the cooling water supplied from the supply pipe 42 to the hollow interior 40 is discharged from the lower discharge pipe 43 and the first upper discharge outlet 451, but not from the second upper discharge outlet 461.

[0036] In the side guide 4 according to the embodiment, when a first abnormality occurs (when a supply abnormality occurs) in which the supply amount of cooling water supplied from the supply pipe 42 is less than normal, cooling water is not discharged not only from the second upper discharge port 461 but also from the first upper discharge port 451. As a result, in the side guide 4 according to the embodiment, an operator can visually confirm that cooling water is not being discharged from the first upper discharge port 451, and can easily determine that an abnormality has occurred in the supply of cooling water from the supply pipe 42 to the hollow interior 40.

[0037] FIG. 4 is a cross-sectional view of a side guide 400 of a comparative example.

[0038] As shown in FIG. 4, the side guide 400 of the comparative example includes a side guide main body 401 and a liner 407. The side guide main body 401 has a hollow box-shaped cross-section structure that is surrounded by an upper wall 401a, a lower wall 401b, an inner wall 401c, and an outer wall 401d to form a hollow interior 440. In the side guide 400 of the comparative example, cooling water is sprayed from a supply pipe 402 connected to the upper wall 401a toward the inner surface of the inner wall 401c, to which the liner 407 is attached, to cool the side guide 400. After being sprayed from the supply pipe 402 onto the inner surface of the inner wall 401c, the cooling water collects in the lower part of the hollow interior 440 and is discharged from a lower discharge pipe 403 connected to the lower wall 401b.

[0039] FIG. 5 is a diagram showing a cooling problem in the side guide 400 of the comparative example.

[0040] In the side guide 400 of the comparative example, if poor water supply occurs due to clogging of the supply pipe 402 or a problem upstream of the supply pipe 402, the side guide main body 401 will be insufficiently cooled ((1) in FIG. 5). Furthermore, as the side guide 400 is used for a long period of time, foreign matter 7 such as scale and dirt will accumulate in the lower part of the hollow interior 440 or clog the lower discharge pipe 403, causing abnormalities in the discharge of cooling water from the lower discharge pipe 403 ((2) in FIG. 5). When abnormalities in the discharge of cooling water occur, high-temperature cooling water that has absorbed heat from the side guide main body 401 is likely to accumulate in the hollow interior 440, resulting in insufficient cooling of the side guide main body 401. The temperature rise of the side guide main body 401 due to insufficient cooling creates a high-temperature environment in the hollow interior 440, which makes it more likely that corrosion or thinning will occur in the lower wall 401b that comes into contact with the cooling water accumulated in the lower part of the hollow interior 440 ((3) in FIG. 5). Furthermore, seizure tends to occur between the inner wall portion 401c of the side guide main body portion 401 and the liner 407 ((4) in FIG. 5).

[0041] The following is another cause of seizure between the inner wall portion 401c and the liner 407. For example, if the side guide main body 401 is not cooled sufficiently, the bolts that attach the liner 407 to the inner wall portion 401c are likely to elongate and deform. If elongation and deformation of the bolts occurs, misalignment between the liner 407 and the inner wall portion 401c is likely to occur when the side guide 400 guides the rolled material 2, and seizure is likely to occur between the inner wall portion 401c and the liner 407.

[0042] Furthermore, seizure between the inner wall portion 401c and the liner 407 may cause problems such as a shortened replacement cycle for the liner 407 and increased wear on the liner attachment surface of the inner wall portion 401c.

[0043] FIG. 6 is a cross-sectional view of the side guide 4 when the second abnormality occurs.

[0044] In the side guide 4 according to the embodiment, when foreign matter 7 such as scale accumulates in the lower portion of the hollow interior 40, the foreign matter 7 clogs the lower discharge pipe 43 and the adjustment valve 44, resulting in a discharge abnormality. As a result, cooling water is discharged not only from the first upper discharge port 451 but also from the second upper discharge port 461. That is, when a second abnormality occurs (discharge abnormality occurs) in which the amount of cooling water discharged from the lower discharge pipe 43 is less than normal, cooling water is discharged from at least the first upper discharge port 451 and the second upper discharge port 461. As a result, in the side guide 4 according to the embodiment, an operator can easily determine that a cooling water discharge abnormality has occurred in the lower discharge pipe 43 or the adjustment valve 44 by visually confirming that cooling water is being discharged from the second upper discharge port 461. Furthermore, an operator can easily determine the accumulation status of foreign matter 7 such as scale in the hollow interior 40 during daily inspections or operation.

[0045] FIG. 7 is a cross-sectional view of the side guide 4 during clogging removal.

[0046] In the side guide 4 according to this embodiment, when it is confirmed that cooling water is being discharged from the second upper discharge port 461, for example, the adjustment valve 44 provided on the lower discharge pipe 43 is fully opened, and cooling water is supplied from the supply pipe 42 to the hollow interior 40 at a pressure higher than normal. Note that the water pressure (original pressure) of the cooling water under normal conditions is, for example, 3 atmospheres, and when removing a blockage (when a first abnormality occurs), the water pressure (original pressure) is set to a pressure higher than 3 atmospheres. This makes it possible to blow away and remove foreign matter 7, such as scale, that has clogged the lower discharge pipe 43 and the adjustment valve 44 by blowing with high-pressure cooling water.

[0047] As described above, in the side guide device, hot rolling equipment, and side guide cooling method according to the embodiment, abnormalities in the supply and discharge of cooling water at the side guide can be easily confirmed. As a result, the side guide device, hot rolling equipment, and side guide cooling method according to the embodiment can easily detect abnormalities when poor cooling of the side guide occurs. Note that, in this embodiment, a side guide used in a roughing mill for shaped steel has been described as an example, but the present invention is not limited to this, and can be applied to any side guide used in a rolling mill for rolling hot metal material. [Explanation of symbols]

[0048] 1 Furnace 2. Rolled material 3 Roughing mill 4,400 Side guide 4A Inlet side guide 4B Exit side guide 5A Inlet side position adjustment mechanism 5B Exit side position adjustment mechanism 6 Transport table 7 Foreign object 40,440 Hollow interior 41,401 Side guide body 41a,401a Upper wall 41b,401b Lower wall part 41c,401c Inner wall 41d,401d Outer wall 42,402 Supply pipe 43,403 Lower discharge pipe 44 Adjusting valve 45 First upper discharge pipe 46 Second upper discharge pipe 47,407 Liner 100 Shaped Steel Rolling Line 110A Inlet side guide device 110B Exit side guide device 120 Hot rolling equipment 451 First upper outlet 461 Second upper discharge port

Claims

1. A side guide device having a pair of side guides arranged on both sides in the width direction of a rolled material to be transported and hot rolled, The side guide is a side guide body having a hollow interior; a supply pipe connected to the side guide body so as to communicate with the hollow interior, for supplying a coolant to the hollow interior; a lower discharge pipe connected to a lower surface of the side guide body so as to communicate with the hollow interior, for discharging the cooling liquid from the hollow interior; a first upper discharge pipe connected to an upper surface of the side guide body portion so as to communicate with the hollow interior, the first upper discharge pipe having a first upper discharge port for discharging the cooling liquid from the hollow interior; It is equipped with an amount of the cooling liquid discharged from the lower discharge pipe is adjusted so that the cooling liquid supplied from the supply pipe to the hollow interior is normally discharged from the lower discharge pipe and the first upper discharge port; This side guide device is configured so that the cooling liquid is not discharged from the first upper discharge port when the first abnormality occurs, so that an operator can visually confirm that the cooling liquid is not being discharged from the first upper discharge port and determine that a first abnormality has occurred, in which the amount of cooling liquid supplied from the supply pipe is less than usual.

2. the side guide includes a second upper discharge pipe connected to an upper surface of the side guide body portion so as to communicate with the hollow interior, the second upper discharge pipe having a second upper discharge port for discharging the cooling liquid from the hollow interior, the second upper outlet is disposed above the first upper outlet, an amount of the cooling liquid discharged from the lower discharge pipe is adjusted so that the cooling liquid supplied from the supply pipe to the hollow interior is not discharged from the second upper discharge port during the normal operation; 2. The side guide device according to claim 1, wherein the cooling liquid is discharged from the second upper discharge port when the second abnormality occurs so that the worker can visually confirm that the cooling liquid is being discharged from the second upper discharge port and determine that a second abnormality has occurred in which the amount of cooling liquid discharged from the lower discharge pipe is less than under normal circumstances.

3. 3. The side guide device according to claim 1, further comprising an adjustment valve provided in the lower discharge pipe for adjusting the amount of the cooling liquid discharged from the lower discharge pipe.

4. a liner provided on a surface of the side guide body portion facing the material to be rolled, The side guide device according to claim 1 , wherein the first upper outlet is disposed so that the cooling liquid is discharged toward the liner.

5. a liner provided on a surface of the side guide body portion facing the material to be rolled, The side guide device according to claim 2 , wherein at least one of the first upper discharge port and the second upper discharge port is arranged so that the cooling liquid is discharged toward the liner.

6. a rolling mill that rolls the material to be rolled that has been heated in the heating furnace; a side guide device according to claim 1, 2, 4 or 5, which is provided on at least one of the upstream side and the downstream side of the rolling mill in a conveying direction of the rolled material from the heating furnace to the rolling mill; A hot rolling facility comprising:

7. A method for cooling a pair of side guides arranged on both sides in the width direction of a material to be rolled that is transported from a heating furnace to a rolling mill and rolled, comprising: The side guide is a side guide body having a hollow interior; a supply pipe connected to the side guide body so as to communicate with the hollow interior, for supplying a coolant to the hollow interior; a lower discharge pipe connected to a lower surface of the side guide body so as to communicate with the hollow interior, for discharging the cooling liquid from the hollow interior; a first upper discharge pipe connected to an upper surface of the side guide body portion so as to communicate with the hollow interior, the first upper discharge pipe having a first upper discharge port for discharging the cooling liquid from the hollow interior; It is equipped with adjusting a discharge amount of the cooling liquid discharged from the lower discharge pipe so that the cooling liquid supplied from the supply pipe to the hollow interior is normally discharged from the lower discharge pipe and the first upper discharge port; A method for cooling a side guide, characterized in that the side guide is configured so that the cooling liquid is not discharged from the first upper discharge port when the first abnormality occurs, so that an operator can visually confirm that the cooling liquid is not being discharged from the first upper discharge port and determine that a first abnormality has occurred in which the amount of cooling liquid supplied from the supply pipe is less than usual.

8. the side guide includes a second upper discharge pipe connected to an upper surface of the side guide body portion so as to communicate with the hollow interior, the second upper discharge pipe having a second upper discharge port for discharging the cooling liquid from the hollow interior, the second upper outlet is disposed above the first upper outlet, adjusting a discharge amount of the cooling liquid discharged from the lower discharge pipe so that the cooling liquid supplied from the supply pipe to the hollow interior is not discharged from the second upper discharge port during the normal period; The cooling method for a side guide as described in claim 7, characterized in that the side guide is configured so that the cooling liquid is discharged from the second upper discharge port when the second abnormality occurs, so that the worker can visually confirm that the cooling liquid is being discharged from the second upper discharge port and determine that a second abnormality has occurred in which the amount of cooling liquid discharged from the lower discharge pipe is less than under normal circumstances.

9. The discharge amount of the cooling liquid discharged from the lower discharge pipe is 9. A side guide cooling method according to claim 7 or 8, characterized in that the cooling is adjusted by an adjustment valve provided in a lower discharge pipe connected to the underside of the side guide main body so as to communicate with the hollow interior.

10. The cooling method for a side guide according to claim 7, characterized in that the cooling liquid is discharged from the first upper discharge port toward a liner provided on the surface of the side guide main body portion facing the rolled material.

11. A cooling method for a side guide as described in claim 8, characterized in that the cooling liquid is discharged from at least one of the first upper discharge outlet and the second upper discharge outlet toward a liner provided on the surface of the side guide main body facing the rolled material.

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