JPH10181835A - Divisible tire roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a tire disk and a tire roller of shape and structure subjected to reduced thermal stress at lower costs. SOLUTION: A divisible tire roller comprises a core bar 12 having therein a passage for a refrigerant, and a tire disk 13 arranged around the core bar 12 so as to come into contact with hot pieces to be transferred. The tire disk 13 is radially divisible into a plurality of members 17 and 18. The members 17 and 18 are radially layered such that their adjacent faces radially opposed to each other hold discontinuous parts therebetween, so as not to affect each other with thermal stresses caused thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type tire roller for transporting a high-temperature object such as a slab in a high-temperature atmosphere such as in a soaking furnace.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 and 6, in a high temperature (for example, 1200 ° C.) soaking furnace disposed in a steel sheet production line or the like, a plurality of tire rollers 2 are used as a means for conveying a slab 1. You are using This tire roller 2
Arranges a plurality of tire disks 4 on a cored bar 3,
A heat insulating material 5 is provided so as to cover the outer peripheral surface. The metal core 3 is made of carbon steel and has a water passage 6 for a cooling medium inside. The outer surface temperature is maintained at about 250 ° C. by a cooling action received from the cooling medium. Therefore, the tire disc 4
Has a large internal-external temperature difference (about 900 ° C.), and uses high-grade heat-resistant steel to withstand the thermal stress caused by this.

[0003]

In the conventional construction described above, the amount of expansion due to thermal expansion occurring in the tire roller 2 is determined by the value of the slab at an inner peripheral side close to the cored bar 3 due to the temperature difference between the inside and outside. The value is smaller than the value of the portion on the outer peripheral side in contact with 1. As a result, the thermal stress generated in the tire disk 4 acts as a tensile stress on the inner peripheral side and acts as a compressive stress on the outer peripheral side, and a crack 7 is generated on the inner peripheral side where the stress is large, and the tire disk 4 is damaged. There was a problem.

[0004] For this purpose, studies have conventionally been made on the improvement of high-grade heat-resistant steel constituting the tire disk 4, and the high-grade heat-resistant steel having a strength capable of withstanding thermal stress due to an internal / external temperature difference (about 900 ° C.). I was aiming for development. However, it is difficult to increase the strength of the high-grade heat-resistant steel by improving the composition, and the developed high-grade heat-resistant steel naturally has a high cost. By the way, since the tire roller 2 is a mechanical part that can be moved in a high-temperature atmosphere, its position as a consumable that needs to be replaced in maintenance or the like remains unchanged even if its durability is improved. Mounting the used tire disc 4 on the tire roller 2 causes an increase in running cost.

The present invention has been made to solve the above-mentioned problems, and can reduce thermal stress in shape and structure.
It is an object of the present invention to provide a split tire roller capable of manufacturing a tire disk and a tire roller at low cost.

[0006]

In order to solve the above-mentioned problems, a split-type tire roller according to the present invention comprises a core disc having a cooling medium flow path inside, and a tire disk contacting a high-temperature conveyed object. Mounted, the tire disc is divided into a plurality of members in the radial direction, and each member is laminated and arranged in multiple layers in the radial direction, and discontinuous between the opposing surfaces of the radially adjacent members. Form a part,
The thermal stress generated in each member does not affect each other.

[0007] Further, the member forming the outer layer is formed to be thin in the radial direction. Further, the member forming the inner layer is divided into a plurality of partial pieces in the circumferential direction, and a discontinuous portion is formed between the facing surfaces of the adjacent partial pieces in the circumferential direction.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4, a split-type tire roller 11 is used in a high-temperature atmosphere such as a soaking furnace, in which a plurality of tire discs 13 are mounted on a cored bar 12 and an outer peripheral surface of the cored bar 12 is made of a heat insulating material. It was covered with 14. The cored bar 12 has a hollow shape and has a channel 15 through which a cooling medium such as cooling water flows, and the tire disc 13 is in contact with a conveyed object 16 such as a high-temperature slab.

The tire disk 13 is divided into a plurality of members in the radial direction, and the members of the outer roll 17 and the inner roll 18 are stacked in the radial direction in multiple layers. For this reason, there is a discontinuous portion between the opposing surfaces of the outer peripheral roll 17 and the inner roll 18 that are adjacent in the radial direction, so that the thermal stress generated in each of the outer peripheral roll 17 and the inner roll 18 does not affect each other. ing.

The outer peripheral roll 17 is located farthest from the metal core 12 through which the cooling medium flows, and forms an outer layer in contact with the conveyed object 16. The outer peripheral roll 17 is made of high-grade heat-resistant steel and has a small thickness in the radial direction. . The inner surface roll 18 forms an inner layer that is in contact with the cored bar 12, and is composed of a plurality of partial pieces 18a, 18b, and 18c divided in the circumferential direction, and is formed of heat-resistant steel. Each piece 18a, 18b, 1
8c functions as a cradle for holding the outer peripheral roll 17 with respect to the cored bar 12. The opposing surfaces of the adjacent partial pieces 18a, 18b, 18c in the circumferential direction of the inner surface roll 18 are greatly separated to form a discontinuous portion.
The structure is such that thermal stresses occurring in b and 18c do not affect each other.

Each piece 18a, 18 of the inner roll 18
A concave portion 19 and a convex portion 20 that fit in the radial direction are formed on both opposing surfaces of the outer roller 17 and the outer roll 17, and the shaft of the split-type tire roller 11 is formed by fitting the concave portion 19 and the convex portion 20. The inner roll 18 and the outer roll 17 are positioned in the center direction. The concave portion 19 and the convex portion 2
0 may be present on the opposite surfaces, not the surfaces disclosed in the drawings.

Each partial piece 18a, 18 of the inner roll 18
b, 18c, the first stopper 21 shown in FIG.
By welding and fixing to the core 2, the core 12 is positioned and prevented from rotating. The first stoppers 21 are present at appropriate intervals along the circumferential direction on the outer peripheral surface of the cored bar 12, and a pair of first stoppers 21 and 21 opposing each other move the respective partial pieces 18 a, 18 b, 18 c along the circumferential direction. Between the front and rear sides. The outer peripheral roll 17 is fixed by welding a second stopper 22 shown in FIG. 4 to the inner peripheral surface thereof, so that the respective partial pieces 18a, 18b, 18c of the inner roll 18 are formed.
It is stopped against. The second stoppers 22 are present at a plurality of locations on the inner peripheral surface of the outer peripheral roll 17 and prevent the outer peripheral roll 17 from rotating in both directions along the circumferential direction.

With the above-described configuration, two discontinuous portions exist in the radial direction between the outer peripheral roll 17 and the metal core 12, and the outer peripheral roll 17 has a function of cooling the cooling water flowing through the flow path 15 of the core metal 12. Almost no. For this reason, the outer roll 1
Reference numeral 7 denotes a small temperature difference between the outer peripheral surface and the inner peripheral surface in contact with the high-temperature conveyed object 16, and a reduction in thermal stress caused by a difference in thermal expansion between the outer peripheral portion and the inner peripheral portion. Thus, damage can be prevented. In addition, the outer peripheral roll 17
Since the generated thermal stress is small, the thickness can be reduced in the radial direction with a stress within the allowable design stress range.
The use amount of the high-grade heat-resistant steel can be reduced, and the cost can be reduced.

The inner peripheral roll 18 is divided into a plurality of partial pieces 18a, 18b, 18c in the circumferential direction, and a discontinuous portion exists between the adjacent partial pieces 18a, 18b, 18c in the circumferential direction. Since the thermal deformation is not restricted in the circumferential direction and the radial direction, the generated thermal stress has a small value, so that damage can be prevented. For this reason, a low-grade material having a small design allowable stress can be used.

Further, since the discontinuous portion is formed between the facing surfaces of the members adjacent in the radial direction, the thermal resistance increases, and the energy loss due to water cooling can be reduced.

[0016]

As described above, according to the present invention, the tire disk is divided into a plurality of members in the radial direction so that the thermal stress generated in each member does not affect each other. In addition, damage of each member due to thermal stress can be prevented. Further, the member forming the outer layer can be formed to have a small thickness in the radial direction, so that the amount of high-grade material used can be reduced and cost can be suppressed. Furthermore, by dividing the member forming the inner layer into a plurality of partial pieces in the circumferential direction, thermal deformation of each partial piece occurs without being restrained in the circumferential direction, thereby reducing thermal stress and preventing damage. It is possible to use a low-grade material with a small allowable stress.

[Brief description of the drawings]

FIG. 1 is a front view showing a split type tire roller according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing a first stopper according to the embodiment of the present invention.

FIG. 4 is a perspective view showing the second stopper.

FIG. 5 is a schematic view showing an arrangement of a conventional tire roller.

FIG. 6 is a front view of the tire roller.

FIG. 7 is a front view of a conventional tire disk.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Split type tire roller 12 Core metal 13 Tire disk 17 Outer roll 18 Inner roll 18a, 18b, 18c Partial piece

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masamichi Hino 1-1-1, Hama, Amagasaki-shi, Hyogo Inside Kubota Analysis Technology Center Co., Ltd. (72) Inventor Shinozaki ▲ Akira ▼ 1-1-1, Hama, Amagasaki-shi, Hyogo Inside Kubota Analysis Technology Center Co., Ltd. (72) Inventor Yasuhiko Horibe 1-1-1, Hama, Amagasaki City, Hyogo Prefecture Inside Kubota Analysis Technology Center Co., Ltd.

Claims (3)

[Claims] 1. A core having a cooling medium flow path therein,
A tire disc that is in contact with a high-temperature conveyed article is mounted, and the tire disc is divided into a plurality of members in a radial direction, and each member is stacked and arranged in a multiplex manner in a radial direction, and adjacent to each other in a radial direction. A split type tire roller characterized in that a discontinuous portion is formed between opposing surfaces of respective members to be formed so that thermal stress generated in each member does not affect each other. 2. The split type tire roller according to claim 1, wherein a member forming the outer layer is formed to have a small thickness in a radial direction. 3. The method according to claim 1, wherein the member forming the inner layer is divided into a plurality of partial pieces in the circumferential direction, and a discontinuous portion is formed between opposing surfaces of the adjacent partial pieces in the circumferential direction. 2. The split-type tire roller according to 2.