JP6322465B2 - Internal cooling roll and high temperature material transport method - Google Patents

Description

The present invention relates to an internal cooling type roll and a method for conveying a high temperature material using the roll.

Various rolls such as a guide roll, a pinch roll, and a reduction roll are provided in the continuous casting facility and the hot rolling facility. When these rolls are used, their outer peripheral surfaces come into contact with high-temperature steel and the like and become high temperature. Therefore, an internal cooling type roll is used to reduce the heat load. As an internal cooling type roll, there is one having a structure in which a sleeve provided with a plurality of cooling water passages is fitted to a shaft body (see Patent Documents 1 and 2).

In the conventional internal cooling roll, the temperature rise is suppressed by flowing water through a plurality of cooling water passages provided inside the outer peripheral surface. However, the entire outer peripheral surface of the roll is always cooled uniformly regardless of the rotational direction phase. That is, since the cooling water is flowing also in the part away from the position in contact with the high temperature material, the temperature drop at the position away from the high temperature material is large. That is, on the outer peripheral surface of the roll, the temperature difference between the contact position with the high temperature material and the other position becomes large. Thus, if the temperature difference is large on the outer peripheral surface of the roll, roll bending tends to occur. In addition, it is not preferable from the viewpoint of strength reduction to provide a large-diameter cooling water passage at the axial center of the roll or to make the roll have a multiple structure.

Japanese Utility Model Publication No. 61-21162 JP-A-6-277808

The present invention has been made in view of such circumstances, an internal cooling type roll that can reduce the temperature difference between the contact position with the high-temperature material on the outer peripheral surface of the roll and other positions, and suppress the occurrence of roll bending, and It aims at providing the conveyance method of a high temperature material.

The internal cooling type roll according to the first invention that meets the above-mentioned object is an internal cooling type roll comprising a roll body having a plurality of cooling passages therein and a pair of bearing bodies that rotatably support the roll body. The plurality of cooling passages are arranged annularly along the axial direction of the roll body, and each cooling passage has an inlet and an outlet for fluid and is located in a predetermined direction with respect to the axis of the roll body. A fluid supply means for supplying a cooling fluid a as the fluid from the inlet of each cooling passage is provided only in the cooling passage existing in A, and the fluid supply means is a region B different from the region A. A fluid b different from the fluid a is supplied from the inlet of each cooling passage to the cooling passage existing in

According to the internal cooling roll according to the first invention, the fluid supply means exists in the region A (for example, the contact position with the high temperature material and the vicinity thereof) located in a predetermined direction with respect to the axis of the roll body. The cooling fluid a is supplied only to the cooling passage. For this reason, about area | regions other than the area | region A in a roll main body outer peripheral surface, cooling will not be actively performed. Therefore, the temperature difference between the contact position with the high temperature material and other positions can be reduced, and the occurrence of roll bending can be suppressed. Moreover, the fall of intensity | strength can also be suppressed by setting it as the structure which does not provide a large diameter cooling channel | path in the roll main body center (central axis). Here, “along the axial direction of the roll body” is not limited to being completely parallel to the axial direction, but is arranged substantially linearly from one side of the roll body to the other side. It should be. The predetermined direction based on “the axis of the roll body” refers to the upward direction, the downward direction, the lateral direction, each oblique direction, and the like of the axis. For example, assuming that the region A is a region located in the upward direction of the shaft, the cooling passage existing in the region A located in the upward direction of the shaft will change sequentially as the roll body rotates. . That is, the fluid supply means sequentially supplies the fluid a to the new cooling passage that enters the region A. In addition, “region located in a predetermined direction” refers to a region having a width. For example, the region positioned in the upward direction of the axis is not limited to a straight line on the outer peripheral surface directly above the axis, but is a concept including the vicinity thereof (before and after the rotation direction).

Furthermore, the fluid supply means does not want to cool other than the region A by supplying the fluid b different from the fluid a as the fluid from the inlet of each cooling passage to the cooling passage existing in the region B different from the region A. In the cooling passage located in the region, the fluid a can be forcibly discharged by the fluid b. Therefore, the temperature drop in the region other than the region A can be further suppressed. Note that the region B is also a region located in a predetermined direction with respect to the axis of the roll body (different from the region A). The thermal conductivity of the fluid b is preferably smaller than the thermal conductivity of the fluid a. The temperature of the fluid b is preferably higher than the temperature of the fluid a. The temperature of the fluid b may be equal to or lower than the temperature of the fluid a. In this case, a fluid having a thermal conductivity smaller than the heat capacity of the fluid a is used as the fluid b.

In the internal cooling roll according to the first invention, it is preferable that the fluid a is water and the fluid b is air. Economic efficiency can be improved by using water and air. Moreover, the temperature fall of area | regions other than the area | region A can be suppressed more by using the air whose heat conductivity is sufficiently small compared with water for the fluid b.

In the internal cooling type roll according to the first invention, the fluid supply means has an end face α fixed in a slidable contact with each inlet of the cooling passage, and supplies the fluid to the cooling passage. It is preferable that the supply port to be provided includes the supply port A for supplying the fluid a to the cooling passage in the region A. Since the fluid supply means specifically has such a structure, the fluid a can be efficiently supplied to the cooling passage existing in the region A.

In the internal cooling type roll according to the first invention, the fluid supply means has an end face α fixed in a slidable contact with each inlet of the cooling passage, and supplies the fluid to the cooling passage. A supply port for supplying the fluid a to the cooling passage in the region A and the cooling passage in the region B. It is preferable that the supply port B to be supplied is included. Since the fluid supply means specifically has such a structure, the fluid a can be efficiently supplied to the cooling passage existing in the region A and the fluid b can be efficiently supplied to the cooling passage existing in the region B. .

In the internal cooling roll according to the first invention, it is preferable that a sealing material is provided around the supply port. By providing the sealing material around the supply port, it is possible to reduce fluid leakage when supplying the fluid from the fluid supply means to the rotating cooling passage.

In the internal cooling roll according to the first invention, each inlet of the cooling passage is preferably provided at an end portion of the outer peripheral surface of the roll body. By doing in this way, the strength fall of the roll main body by providing a cooling channel | path is suppressed. Moreover, since the sealing material can be brought into contact with the roll end portion having a relatively low temperature, deterioration of the sealing material or the like can be suppressed.

In the internal cooling roll according to the first invention, each inlet of the cooling passage is preferably provided on an end surface of the roll body. By doing in this way, since the punching from the outer periphery to the center direction becomes unnecessary, the manufacturing cost (cost related to the punching) can be reduced, and the strength reduction of the roll body can be further suppressed. Moreover, since a sealing material can be made to contact the roll edge part with comparatively low temperature, deterioration of a sealing material etc. can be suppressed more.

In the internal cooling roll according to the first aspect of the present invention, the end face β slidably contacts with each outlet of the cooling passage, and a recovery port for recovering the fluid discharged from each outlet of the cooling passage is the end face. It is preferable to provide fluid recovery means provided in β. By providing such fluid recovery means on the outlet side, the fluid supplied to the cooling passage can be discharged and recovered efficiently.

In the internal cooling type roll according to the first aspect of the present invention, it is preferable that each of the cooling passages is inclined outward from the inlet side to the outlet side. In this case, the distance (thickness) from the outer peripheral surface of the roll body to the cooling passage decreases from the inlet side to the outlet side. In this way, the thermal conductivity increases toward the outlet side, and balance with the decrease in the cooling capacity of the fluid a that occurs because the temperature increases toward the outlet side, and the cooling capacity is made uniform. Can do.

In the internal cooling roll according to the first aspect of the present invention, it is preferable that the high temperature material is conveyed by rotation of the roll body, and the region A includes a contact position with the high temperature material. It is possible to reduce the temperature difference on the roll peripheral surface when conveying the high temperature material, and to suppress the occurrence of roll bending.

The method for conveying a high temperature material according to the second aspect of the present invention uses a roll main body having a plurality of cooling passages therein and a pair of bearing bodies that rotatably support the roll main body. In the method for transporting a high temperature material, the method has a step of transporting the high temperature material by rotating the roll body in a state where the high temperature material is in contact with the roll body, and in the step, The cooling fluid a is supplied only to the cooling passage existing in the region A of the roll body including the contact position, and each cooling passage is provided in the cooling passage existing in the region B of the roll body different from the region A. supplying different fluids b is an inlet or found before Symbol fluid a passage. According to the method for conveying a high-temperature material according to the second invention, when conveying the high-temperature material, the temperature difference between the contact position with the high-temperature material on the outer periphery of the roll and other positions is reduced, and the occurrence of roll bending is suppressed. Can do.

According to the internal cooling type roll according to the first invention and the method for transporting the high temperature material according to the second invention, the temperature difference between the contact position with the high temperature material on the outer peripheral surface of the roll and other positions is reduced, and the roll bending is prevented. Occurrence can be suppressed. Therefore, the internal cooling type roll according to the first invention and the method for conveying the high temperature material according to the second invention are suitable for, for example, a guide roll, a pinch roll, a reduction roll provided in a continuous casting facility or a hot rolling facility. Can be used.

It is a typical sectional view showing the internal cooling type roll concerning a 1st embodiment of the present invention. (A) is X1-X1 arrow schematic sectional drawing of the internal cooling type | mold roll, (b) is Y1-Y1 arrow schematic sectional drawing. It is a typical sectional view showing an internal cooling type roll concerning a 2nd embodiment of the present invention. (A) is X2-X2 arrow typical sectional drawing of the internal cooling type roll, (b) is Y2-Y2 arrow typical sectional drawing. (A)-(d) is a graph which shows the temperature distribution of the position of 100 mm from the cooling water entrance side slab edge part in an Example. It is a table | surface which shows the temperature distribution of the position of 100 mm from the cooling water entrance side slab edge part in an Example. (A)-(d) is a graph which shows the temperature distribution of the position of 100 mm from the cooling water exit side slab end part in an Example. It is a table | surface which shows the temperature distribution of the position of 100 mm from the cooling water exit side slab edge part in an Example.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the internal cooling type roll 10 according to the first exemplary embodiment of the present invention includes a roll body 11, a pair of bearing bodies 12, a fluid supply means 13, and a fluid recovery means 14. Yes. The high temperature material 60 is transported by a pair of internal cooling rolls 10 and 110. Hereinafter, one internal cooling type roll 10 will be mainly described, and the other internal cooling type roll 110 will be described later with respect to differences from the internal cooling type roll 10.

The roll body 11 is cylindrical and is usually made of metal. The roll body 11 has a central axis arranged horizontally. The roll body 11 has a plurality of cooling passages 15 therein.

The plurality of cooling passages 15 are passages through which fluid (liquid, gas, etc.) flows, and are provided with an inlet 16 and an outlet 17 for the fluid. The plurality of cooling passages 15 are annularly arranged at equal angular intervals along the axial direction of the roll body 11. The cooling passage 15 is substantially parallel to the axis of the roll body 11. The number of cooling passages 15 is not limited to 16 in FIG. 2, and is, for example, about 6 to 30, preferably about 10 to 20.

The inlet 16 of each cooling passage 15 is provided at the outer peripheral end 18 (left end in FIG. 1) of the roll body 11. That is, the vicinity of the inlet 16 of each cooling passage 15 is formed from the outer peripheral surface end 18 toward the central axis. The outer peripheral surface end 18 of the roll main body 11 has a smaller diameter than the other outer peripheral surfaces.

The outlet 17 of each cooling passage 15 is provided at the outer peripheral surface end 19 (the right end in FIG. 1) of the roll body 11 on the opposite side to the inlet 16. That is, the vicinity of the outlet 17 of each cooling passage 15 is formed from the outer peripheral surface end 19 toward the central axis. The outer peripheral surface end 19 of the roll body 11 has a smaller diameter than the other outer peripheral surfaces.

Each cooling passage 15 is slightly inclined outward (along the flow direction) from the inlet 16 side to the outlet 17 side. As a result, the distance (thickness) from the outer peripheral surface to the cooling passage 15 in the portion of the roll body 11 where the cooling passage 15 is disposed becomes smaller from the inlet side to the outlet side.

The pair of bearing bodies 12 supports the roll body 11 with bearings 20 on the left and right of the roll body 11 so as to be rotatable. The bearing body 12 is composed of a known bearing or the like.

The fluid supply means 13 (fluid supply device) supplies the cooling fluid a from the inlet 16 of each cooling passage 15 only to the cooling passage 15 existing in the region A located in a predetermined direction with respect to the axis of the roll body 11. A fluid b different from the fluid a is supplied from the inlet 16 of each cooling passage 15 to the cooling passage 15 existing in the region B different from the region A. The fluid supply means 13 is fixed to the inlet-side bearing body 12 and is configured not to rotate with the roll body 11.

Here, the area A, the area B, and the area C in the roll main body 11, the fluid supply means 13, and the fluid recovery means 14 are defined with reference to FIGS. 2 (a) and 2 (b). Of the three regions obtained by dividing the roll body 11 into three sections in a cross section perpendicular to the axis of the roll body 11, the area A is an area located below (on the side in contact with the high temperature material 60) with respect to the axis of the roll body 11. 2 is an area located on the upper right side (downstream in the rotation direction of the area A) with respect to the axis of the roll body 11 in FIG. 2, and the area C is an upper left side on the basis of the axis of the roll body 11 in FIG. This is an area located downstream of the area B in the rotation direction. Note that the areas A to C do not need to be divided into three equal parts. For example, the circumferential angle of the arc of the outer peripheral surface of the region A in the cross section perpendicular to the axis of the roll body 11 can be 1 ° or more and less than 180 °.

The fluid supply means 13 includes an annular body 21 (annular tube) and two pipes 22 and 23 connected to the annular body 21. Further, the fluid supply means 13 has a pump (not shown) for supplying two kinds of fluid to the annular body 21 via the two pipes 22 and 23.

The annular body 21 is fitted and fixed to the outer peripheral surface end 18 on the inlet 16 side of the roll body 11. An annular (cylindrical) surface where the annular body 21 is in contact with the outer peripheral surface end 18 (the inlet 16 of each cooling passage 15) of the roll body 11 is an end surface α24. The end surface α24 is fixed in a state in which it is slidably in contact with each inlet 16 (outer peripheral surface end portion 18) of the cooling passage 15 (does not rotate).

The annular body 21 has two separated hollow portions 25 and 26. The hollow part 25 is provided in the part (position corresponding to the area | region A) located below among the parts into which the annular body 21 was divided into three by the axial view. The hollow portion 25 is connected to the pipe 22 outside the annular body 21. The hollow portion 26 is provided in a portion (a position corresponding to the region B) located downstream of the hollow portion 25 (downstream in the rotation direction of the roll body 11) in the portion obtained by dividing the annular body 21 in the axial direction. It is done. The hollow portion 26 is connected to the pipe 23 outside the annular body 21. The portion corresponding to the region C of the annular body 21 is solid.

The insides of the hollow portions 25 and 26 are respectively opened, and these openings serve as a supply port A28 and a supply port B29. That is, two supply ports 27 (supply port A28 and supply port B29) for supplying fluid to the cooling passage 15 are provided on the inner side (end surface α24) of the annular body 21. The supply port A28 supplies the fluid a to the cooling passage 15 existing in the region A, and the supply port B29 supplies the fluid b to the cooling passage 15 existing in the region B. That is, the fluid a flows in the order of the pipe 22, the hollow portion 25, the supply port A 28, and the inlet 16 of the cooling passage 15 existing in the region A. The fluid b flows in the order of the pipe 23, the hollow portion 26, the supply port B29, and the inlet 16 of the cooling passage 15 existing in the region B.

A sealing material 30 is provided around each supply port 27 in the end surface α24 (between the roll body 11 and the annular body 21). Specifically, the sealing material 30 is provided in an annular shape at both end portions of the annular end surface α24. For the sealing material 30, known U packing, packing such as O-ring, and the like can be used.

The fluid recovery means 14 (fluid recovery device) is fixed to the bearing body 12 on the outlet side and is configured not to rotate with the roll body 11. The fluid recovery means 14 includes an annular body 31 (annular tube) and two pipes 32 and 33 connected to the annular body 31. The pipes 32 and 33 may be connected to a suction device that forcibly discharges fluid.

The annular body 31 is fitted and fixed to the outer peripheral end 19 on the outlet 17 side of the roll body 11. An annular (cylindrical) surface in which the annular body 31 is in contact with the outer peripheral surface end 19 (the outlet 17 of each cooling passage 15) of the roll body 11 is an end surface β34. The end surface β34 is fixed (does not rotate) in a state where it is slidably in contact with each outlet 17 (outer peripheral surface end portion 19) of the cooling passage 15.

The annular body 31 has one hollow portion 35. The hollow portion 35 is provided at a position corresponding to the region A and the region B. That is, in the annular body 21 of the fluid supply means 13 , the two hollow portions 25 and 26 are separated, but the annular body 31 of the fluid recovery means 14 is integrated. The hollow portion 35 is connected to the pipe 32 at the lower outside of the annular body 31 (position corresponding to the region A), and is connected to the pipe 33 at the upper right of the annular body 31 in FIG. 2 (position corresponding to the region B). doing. The portion corresponding to the region C of the annular body 31 is solid.

A recovery port 36 for recovering fluid (fluid a, fluid b) discharged from each outlet 17 of the cooling passage 15 is provided on the inner side (end face β34) of the annular body 31. That is, the inside of the hollow portion 35 is opened, and this opening is a recovery port 36. The fluid a (for example, water) that is one of the fluids recovered from the recovery port 36 is recovered from the lower pipe 32, and the fluid b (for example, air) is recovered from the upper pipe 33. A sealing material 37 is provided around each collection port 36 in the end surface β34 (between the roll main body 11 and the annular body 31), similarly to the supply port 27 side.

The other internal cooling type roll 110 has a structure in which the internal cooling type roll 10 is turned upside down except for the following points. The annular body 131 of the fluid recovery means 114 of the internal cooling type roll 110 has a hollow portion 135a provided at a position corresponding to the region A and a hollow portion 135b provided at a position corresponding to the region B. The annular body 131 has two separated hollow portions 135a and 135b. In addition, the positions of the areas A, B, and C in the internal cooling type roll 110 are also positions where the internal area type roll 10 is turned upside down.

Next, a method for using the internal cooling type roll 10 (a method for conveying a high temperature material) will be described. As shown in FIG. 1 and FIG. 2, the method of using the internal cooling type roll 10 is a high temperature by rotating the roll body 11 with the high temperature material 60 in contact with the roll body 11 as shown in FIGS. A transporting process for transporting the material 60; Examples of the high-temperature material 60 include steel materials used for continuous casting and hot rolling.

In this transport process, the fluid supply means 13 supplies water as the fluid a from the pipe 22 and air as the fluid b from the pipe 23. By doing in this way, the cooling fluid a (water) is supplied only to the cooling passage 15 existing in the region A of the roll body 11 including the contact position with the high temperature material 60. On the other hand, the fluid b (air) is supplied to the cooling passage 15 existing in the region B located downstream of the region A in the rotation direction. That is, water is supplied to the cooling passage 15 that has entered the region A by approaching the high temperature material 60 due to the rotation of the roll body 11, thereby cooling the roll body 11. Next, since air is supplied to the cooling passage 15 moved to the region B by rotation, water is pushed out from the outlet 17, and the inside of the cooling passage 15 moved to the region B is filled with air. Further, since the cooling passage 15 moved to the region C by the rotation is in a state where no fluid is supplied and discharged, the air remains filled. The temperature of the fluid a (water) and the fluid b (air) to be used is not limited and may be room temperature. Further, a cooled fluid a and a heated fluid b may be used.

By such a method, only the contact position with the high temperature material 60 and its vicinity (area A) can be positively cooled. Therefore, the temperature difference between the contact position with the high temperature material 60 and the opposite position can be reduced, and the occurrence of roll bending can be suppressed. Note that the fluids a and b discharged from the cooling passage 15 are recovered via the fluid recovery means 14 and 114. Here, the fluid recovery means 14 of the upper internal cooling roll 10 has only one hollow portion 35 of the annular body 31, but water having a large specific gravity is discharged (recovered) from the lower pipe 32 and remains. Water and air are discharged (collected) from the upper pipe 33. On the other hand, in the fluid recovery means 114 of the lower internal cooling-type roll 110, water is discharged (recovered) from the upper pipe 132 through the hollow portion 135a, and residual water and air are transferred to the lower side through the hollow portion 135b. The pipe 133 is discharged (collected).

As shown in FIGS. 3, 4 (a) and 4 (b), the internal cooling type roll 210 according to the second embodiment of the present invention includes a roll body 211, a pair of bearing bodies 212, a fluid supply means 213, Fluid recovery means 214 is provided. The internal cooling type roll 210 according to the second embodiment has positions of the inlets 216 and the outlets 217 of the plurality of cooling passages 215 included in the roll body 211 as compared with the internal cooling type roll 10 according to the first embodiment. Also, the structures of the annular body 221 of the fluid supply means 213 and the annular body 231 of the fluid discharge means 214 corresponding thereto are different. The above points will be described below. Moreover, the internal cooling type | mold roll 10 can be referred about the part which abbreviate | omits description.

The inlet 216 of each cooling passage 215 is provided on the end surface 218 (left end surface in FIG. 3) of the roll body 211. The outlet 217 of each cooling passage 215 is provided on the end surface 219 (the right end surface in FIG. 3) of the roll main body 211. That is, each cooling passage 215 is formed (perforated) in a straight line from the inlet 216 to the outlet 217.

The annular body 221 of the fluid supply means 213 has a planar annular end surface α224 that contacts the end surface 218 of the roll body 211 (the inlet 216 of each cooling passage 215). The end surface α 224 is fixed (does not rotate) in a state where it is slidably in contact with each inlet 216 (end surface 218) of the cooling passage 215. An end surface α224 of the annular body 221 is provided with a supply port A228 for supplying the fluid a to the cooling passage 215 in the region A and a supply port B229 for supplying the fluid b to the cooling passage 215 in the region B. That is, the roll main body 211 side (end surface 218 side) of the hollow portions 225 and 226 is opened, and these openings are the supply port A228 and the supply port B229. The fluid a flows in the order of the pipe 222, the hollow portion 225, the supply port A228, and the inlet 216 of the cooling passage 215 existing in the region A. The fluid b flows in the order of the pipe 223, the hollow portion 226, the supply port B229, and the inlet 216 of the cooling passage 215 existing in the region B.

The annular body 231 of the fluid recovery means 214 has a planar annular end surface β234 that contacts the end surface 219 of the roll body 211 (the outlet 217 of each cooling passage 215). The end face β 234 is fixed (does not rotate) in a state in which it is slidably in contact with each outlet 217 (end face 219) of the cooling passage 215. The end surface β234 is planar. A plurality of recovery ports 236 are provided in the end surface β234. The fluid a is recovered from the recovery port 236 located in the region A through the hollow portion 235 and the lower pipe 232. The fluid b is recovered from the recovery port 236 located in the region B through the hollow portion 235 and the upper pipe 233.

The internal cooling roll 310 that is a pair of the internal cooling roll 210 has a basic structure in which the internal cooling roll 210 is turned upside down. However, as in the first embodiment, the annular body 331 of the fluid recovery means 314 is different in that it has two separated hollow portions 335a and 335b.

The usage method of the internal cooling type | mold rolls 210 and 310 which concern on 2nd Embodiment is the same as that of the internal cooling type | mold rolls 10 and 110 which concern on 1st Embodiment. In the internal cooling type rolls 210 and 310, since the cooling passage 215 is formed in a straight line, a decrease in strength of the roll body 211 due to the provision of the cooling passage 215 is suppressed. Moreover, since the sealing material 230 can be brought into contact with the end of the roll body 211 having a relatively low temperature, deterioration of the sealing material 230 and the like can be suppressed.

The present invention is not limited to the above-described embodiment, and the configuration thereof can be changed without changing the gist of the present invention. For example, the combination of the fluid a and the fluid b is not limited to water and air, and two types of fluids (liquid or gas) may be used in appropriate combination. For example, cold water can be used as the fluid a, and hot water can be used as the fluid b. Further, only one pipe may be provided in the fluid recovery means, and the two types of fluids a and b may be recovered together. Furthermore, it is good also as a structure which supplies 3 or more types of fluids.

Hereinafter, the contents of the present invention will be described more specifically with reference to examples and comparative examples. In addition, this invention is not limited to a following example.
Under the conditions of the following Comparative Examples 1 and 2 and Examples 1 and 2, the slab was conveyed while cooling the internal cooling roll. The temperature at each position on the outer peripheral surface of the roll was measured.
[A: Comparative Example 1]
A center hole roll provided with a cooling passage only on the center axis was used as an internal cooling roll using a roll body (flow rate 60 L / min).
[B: Comparative Example 2]
A surface layer cooling roll provided with 16 cooling passages in an annular shape was used as an internal cooling roll using a roll body. However, water was supplied to all the cooling passages (flow rate 60 L / min).
[C: Example 1]
A surface layer cooling roll provided with 16 cooling passages in an annular shape was used as an internal cooling roll using a roll body. However, water was supplied only to the cooling passage located in the region A of about 60 ° centering on the contact position with the high temperature material (slab) (flow rate 60 L / min). No other area was supplied. It was confirmed that the water supplied in area A remained in other areas.
[D: Example 2]
A surface layer cooling roll provided with 16 cooling passages in an annular shape was used as an internal cooling roll using a roll body. However, water was supplied only to the cooling passage located in the region A of about 60 ° centering on the contact position with the high temperature material (slab) (flow rate 60 L / min). Air was supplied and sealed in other areas. Residual water was not confirmed in other areas.

[result]
The measurement results are shown in FIGS. FIGS. 5A to 5D and 6 are a graph and a table showing the temperature distribution at a position 100 mm from the end portion of the high temperature material on the cooling water entry side. FIGS. 7A to 7D and FIG. 8 are a graph and a table showing the temperature distribution at a position 100 mm from the end of the high temperature material at the cooling water outlet side.

As shown in FIGS. 5 to 8, with respect to the temperature at the contact point position, the first and second embodiments are sufficiently cooled as in the second comparative example in which the entire circumference is cooled. On the other hand, the temperature difference (T0 ° −T180 °) between the contact point position and the opposite side position is smaller in Examples 1 and 2 than in Comparative Examples 1 and 2, particularly in Example 2. I understand that.

10: Internal cooling type roll, 11: Roll body, 12: Bearing body, 13: Fluid supply means, 14: Fluid recovery means, 15: Cooling passage, 16: Inlet, 17: Outlet, 18, 19: End of outer peripheral surface , 20: bearing, 21: annular body, 22, 23: pipe, 24: end face α, 25, 26: hollow portion, 27: supply port, 28: supply port A, 29: supply port B, 30: sealing material, 31: annular body, 32, 33: pipe, 34: end face β, 35: hollow portion, 36: recovery port, 37: sealing material, 60: high temperature material, 110: internal cooling roll, 114: fluid recovery means, 131 : Annular body, 132, 133: pipe, 135a, 135b: hollow part, 210: internal cooling roll, 211: roll body, 212: bearing body, 213: fluid supply means, 214: fluid recovery means, 215: cooling passage 216: Entrance, 217 : Outlet, 218, 219: end face, 221: annular body, 222, 223: pipe, 224: end face α, 225, 226: hollow part, 228: supply port A, 229: supply port B, 230: sealant, 231 : Annular body, 232, 233: pipe, 234: end face β, 235: hollow part, 236: recovery port, 310: internal cooling roll, 314: fluid recovery means, 331: annular body, 335a, 335b: hollow part, A: Region A, B: Region B, C: Region C, a: Fluid a, b: Fluid b

Claims (11)

In an internal cooling type roll comprising a roll body having a plurality of cooling passages therein and a pair of bearing bodies that rotatably support the roll body,
The plurality of cooling passages are arranged in an annular shape along the axial direction of the roll body, and each of the cooling passages has an inlet and an outlet for fluid,
A fluid supply means for supplying a cooling fluid a as the fluid from the inlet of each cooling passage only to the cooling passage existing in a region A located in a predetermined direction with respect to the axis of the roll body;
Moreover, the fluid supply means supplies the fluid b different from the fluid a as the fluid from the inlet of each cooling passage to the cooling passage existing in the region B different from the region A. Internal cooling roll. 2. The internal cooling type roll according to claim 1, wherein the fluid a is water and the fluid b is air. 3. The internal cooling type roll according to claim 1, wherein the fluid supply means has an end surface α fixed in a slidable contact with each inlet of the cooling passage, and the fluid is supplied to the cooling passage. An internal cooling type roll characterized in that a supply port for supplying is provided in the end surface α, and the supply port includes a supply port A for supplying the fluid a to the cooling passage existing in the region A. 3. The internal cooling type roll according to claim 1, wherein the fluid supply means has an end surface α fixed in a slidable contact with each inlet of the cooling passage, and the fluid is supplied to the cooling passage. A supply port to be supplied is provided in the end surface α, and the supply port A supplies the fluid a to the cooling passage existing in the region A, and the fluid b to the cooling passage existing in the region B. The internal cooling type | mold roll characterized by including the supply port B which supplies A. 5. The internal cooling type roll according to claim 3, wherein a sealing material is provided around the supply port. The internal cooling type | mold roll of any one of Claims 3-5 WHEREIN: Each inlet_port | entrance of the said cooling channel | path is provided in the outer peripheral surface edge part of the said roll main body, The internal cooling type roll characterized by the above-mentioned. The internal cooling type | mold roll of any one of Claims 3-5 WHEREIN: Each inlet_port | entrance of the said cooling channel | path is provided in the end surface of the said roll main body, The internal cooling type roll characterized by the above-mentioned. The internal cooling type roll according to any one of claims 1 to 7, comprising an end face β slidably in contact with each outlet of the cooling passage, and the fluid discharged from each outlet of the cooling passage. An internal cooling type roll comprising a fluid recovery means in which a recovery port for recovery is provided on the end face β. The internal cooling type | mold roll of any one of Claims 1-8 WHEREIN: Each said cooling channel inclines outside from the entrance side to the exit side, The internal cooling type roll characterized by the above-mentioned. The internal cooling type roll according to any one of claims 1 to 9, wherein a high temperature material is conveyed by rotation of the roll body, and the region A includes a contact position with the high temperature material. Cooling roll. In a method for transporting a high temperature material using a roll body having a plurality of cooling passages therein and an internal cooling type roll provided with a pair of bearing bodies that rotatably support the roll body,
A step of conveying the high temperature material by rotating the roll body in a state where the high temperature material is in contact with the roll body;
In the step, the cooling fluid a is supplied only to the cooling passage existing in the region A of the roll body including the position of contact with the high temperature material, and is present in the region B of the roll body different from the region A. wherein the cooling passage, the transport method of the high temperature material, which comprises supplying different fluids b is an inlet or found before Symbol fluid a of each of the cooling passages to be.

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