A hot stove cantilever roller with water cooling structure

Abstract

The utility model relates to the technical field of rolling mill equipment, and disclose a hot stove cantilever roll with water cooling structure, the hot stove cantilever roll with water cooling structure, the cooling pipe of horseshoe shape setting makes the coolant be able to flow to the top of inner roll first, then flows to the bottom of inner roll again, first passes through the part of larger heat, then passes through the part of smaller heat, preferentially cools high temperature area, can quickly absorb and take away core heat, prevents local overheating, controls temperature rise, improves cooling efficiency, the graphite ring and ceramic ring fit and form dynamic sealing pair, spring device can automatically compensate the wear of long -term operation, prolongs the service life of sealing assembly, reduces maintenance frequency, effectively prevents internal coolant exudation, and the installation ring is connected through the sliding connection with the limiting slot on the inner roll side wall, ensures that the graphite ring always keeps and ceramic ring accurate butt joint.

Description

Technical Field

[0001] This utility model relates to the field of steel rolling equipment technology, specifically a hot furnace cantilever roll with a water-cooled structure. Background Technology

[0002] In the modern metallurgical industry, steelmaking and rolling processes commonly employ heating furnaces to heat steel billets. To ensure stable conveying of steel billets during the furnace loading and unloading process, roller conveyor systems symmetrically arranged with bearing seats are typically installed at the furnace inlet and outlet. These roller conveyors, driven by motors, can withstand the weight and thermal shock of the steel billets under high-temperature conditions, enabling the billets to be smoothly and orderly fed into or removed from the furnace. This not only improves conveying efficiency but also ensures the uniformity of temperature distribution within the furnace and the continuity of operations, making it an important component of automated furnace operation.

[0003] However, in roller conveyor systems, metal components such as rollers on the side of the roller conveyor closest to the high-temperature area are often exposed to high temperatures for extended periods, which can cause thermal expansion and contraction, leading to creep, deformation, or cracking of the material. In severe cases, this can reduce the load-bearing capacity or cause structural damage. In view of this, we propose a hot furnace cantilever roller with a water-cooled structure. Utility Model Content

[0004] The purpose of this invention is to provide a hot furnace cantilever roller with a water-cooled structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hot furnace cantilever roller with a water-cooled structure, comprising an outer roller, wherein a cooling assembly is disposed inside the outer roller, the cooling assembly comprising:

[0006] An inner roller has a sealing plug inserted into its inner wall, a water inlet pipe inserted into the side wall of the sealing plug, a cooling pipe fixedly connected to the side wall of the water inlet pipe, and a water outlet pipe fixedly connected to the end of the cooling pipe away from the water inlet pipe.

[0007] A trapezoidal ring, wherein a spring is fixedly connected to the side wall of the trapezoidal ring, and a mounting ring is fixedly connected to the end of the spring away from the trapezoidal ring, and a graphite ring is fixedly connected to the side wall of the mounting ring;

[0008] A limiting ring, wherein a ceramic ring is fixedly connected to the side wall of the limiting ring.

[0009] Preferably, a ceramic bearing is fixedly connected to the outer wall of the inner roller. The ceramic bearing includes an inner ring and an outer ring. The outer wall of the inner roller is fixedly connected to the inner ring, and the outer wall of the outer ring is fixedly connected to the inner wall of the outer roller.

[0010] Preferably, a ceramic bearing two is fixedly connected to the outer wall of the outer roller. The ceramic bearing two includes an inner ring and an outer ring. The outer wall of the outer roller is fixedly connected to the inner ring. A fixing frame is fixedly connected to the outer wall of the outer ring. The fixing frame is fixedly connected to the sealing plug. The fixing frame prevents the inner roller from rotating, while the ceramic bearing two allows the outer roller to rotate.

[0011] Preferably, there are several cooling pipes, with two cooling pipes forming a group. The groups of cooling pipes are evenly spaced on the outer wall of the water inlet pipe. Each group of cooling pipes is horseshoe-shaped. The water outlet pipe is inserted into the sealing plug. The horseshoe-shaped cooling pipes allow the coolant to flow to the top of the inner roller first, and then to the bottom of the inner roller, passing through the area with higher heat first, and then through the area with lower heat.

[0012] Preferably, the trapezoidal ring is fixedly connected to the inner wall of the inner roller, and a limiting groove is formed on the side wall of the inner roller, the limiting groove being slidably connected to the mounting ring.

[0013] Preferably, the limiting ring is fixedly connected to the inner wall of the outer roller, and the ceramic ring abuts against the graphite ring.

[0014] Preferably, a connecting frame is fixedly connected to the inner wall of the outer roller, a through hole is fixedly connected to the side wall of the connecting frame, and a ceramic sheet is fixedly connected to the inner wall of the connecting frame.

[0015] Compared with the prior art, the present invention provides a hot furnace cantilever roller with a water-cooled structure, which has the following beneficial effects:

[0016] 1. This water-cooled furnace cantilever roller, through its horseshoe-shaped cooling pipes, allows the coolant to flow first to the top of the inner roller and then to the bottom, passing over areas with higher heat first and then areas with lower heat. This prioritizes cooling the high-temperature areas, enabling rapid absorption and removal of core heat, preventing localized overheating, controlling temperature rise, and improving cooling efficiency. The graphite ring and ceramic ring are fitted together to form a dynamic sealing pair. The spring device automatically compensates for wear caused by long-term operation, extending the service life of the sealing components, reducing maintenance frequency, and effectively preventing internal coolant leakage. The mounting ring is slidably connected to the limiting groove on the side wall of the inner roller, allowing it to move only in a limited direction in the axial or radial direction, thus ensuring that the graphite ring always maintains accurate alignment with the ceramic ring under the action of spring force.

[0017] 2. This water-cooled furnace cantilever roller, through the setting of a connecting frame, enhances the structural stability between the outer and inner rollers, preventing the inner roller from shaking or becoming eccentric under high-speed rotation or high-temperature environment, ensuring the overall smoothness and coaxiality of the roller conveyor system. The inner wall of the connecting frame is fixedly connected with ceramic plates, which have good wear resistance and low friction coefficient, and can significantly reduce the friction force when the inner and outer rollers rotate relative to each other. The through holes allow the cooling oil to flow freely between the outer and inner rollers, ensuring the uniform distribution and effective circulation of the cooling medium, improving heat dissipation efficiency, and preventing local overheating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body of this utility model;

[0020] Figure 3 This utility model Figure 2 Schematic diagram of the structure of region A in the middle;

[0021] Figure 4 This is a schematic diagram of the connecting frame structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the water inlet pipe structure of this utility model.

[0023] In the diagram: 1. Outer roller; 2. Cooling assembly; 201. Inner roller; 202. Sealing plug; 203. Water inlet pipe; 204. Cooling pipe; 205. Water outlet pipe; 206. Trapezoidal ring; 207. Spring; 208. Mounting ring; 209. Graphite ring; 210. Limiting ring; 212. Ceramic ring; 3. Connecting frame; 4. Through hole; 5. Ceramic sheet; 6. Limiting groove; 7. Ceramic bearing one; 8. Ceramic bearing two; 9. Fixing frame. Detailed Implementation

[0024] like Figures 1-5 As shown, this utility model provides a technical solution: a hot furnace cantilever roller with a water-cooled structure, including an outer roller 1, and a cooling assembly 2 is provided inside the outer roller 1. The cooling assembly 2 includes an inner roller 201, a sealing plug 202, a water inlet pipe 203, a cooling pipe 204, a water outlet pipe 205, a trapezoidal ring 206, a spring 207, a mounting ring 208, a graphite ring 209, a limiting ring 210, and a ceramic ring 212.

[0025] In one embodiment of this utility model, a sealing plug 202 is inserted into the inner wall of the inner roller 201, and a water inlet pipe 203 is inserted into the side wall of the sealing plug 202. A cooling pipe 204 is fixedly connected to the side wall of the water inlet pipe 203. A water outlet pipe 205 is fixedly connected to the end of the cooling pipe 204 away from the water inlet pipe 203. Several cooling pipes 204 are provided, with each pair of cooling pipes 204 forming a group. Several groups of cooling pipes 204 are equally spaced on the outer wall of the water inlet pipe 203. Each group of cooling pipes 204 is horseshoe-shaped. The water outlet pipe 205 is inserted into the sealing plug 202. The horseshoe-shaped cooling pipes 204 allow the coolant to flow first to the top of the inner roller 201 and then to the bottom of the inner roller 201, passing through the parts with higher heat first and then the parts with lower heat.

[0026] A spring 207 is fixedly connected to the side wall of the trapezoidal ring 206. An installation ring 208 is fixedly connected to the end of the spring 207 away from the trapezoidal ring 206. A graphite ring 209 is fixedly connected to the side wall of the installation ring 208. The trapezoidal ring 206 is fixedly connected to the inner wall of the inner roller 201. A limiting groove 6 is opened on the side wall of the inner roller 201. The limiting groove 6 is slidably connected to the installation ring 208. A ceramic ring 212 is fixedly connected to the side wall of the limiting ring 210. The limiting ring 210 is fixedly connected to the inner wall of the outer roller 1. The ceramic ring 212 abuts against the graphite ring 209.

[0027] A ceramic bearing 7 is fixedly connected to the outer wall of the inner roller 201. The ceramic bearing 7 includes an inner ring and an outer ring. The outer wall of the inner roller 201 is fixedly connected to the inner ring. The outer wall of the outer ring is fixedly connected to the inner wall of the outer roller 1. A ceramic bearing 8 is fixedly connected to the outer wall of the outer roller 1. The ceramic bearing 8 includes an inner ring and an outer ring. The outer wall of the outer roller 1 is fixedly connected to the inner ring. A fixing frame 9 is fixedly connected to the outer wall of the outer ring. The fixing frame 9 is fixedly connected to the sealing plug 202. The fixing frame 9 prevents the inner roller 201 from rotating, while the ceramic bearing 8 allows the outer roller 1 to rotate.

[0028] When the outer roller 1 conveys the steel billet, the heat generated by the billet is transferred inward through the outer roller 1. Cooling oil is filled between the outer roller 1 and the inner roller 201, and the interior of the inner roller 201 is filled with coolant. Heat can be transferred from top to bottom into the inner roller 201. Cooling water enters the inner roller 201 through the water inlet pipe 203 and then enters the cooling pipe 204. The horseshoe-shaped cooling pipe 204 allows the coolant to flow to the top of the inner roller 201 first and then to the bottom of the inner roller 201, passing through the parts with higher heat first and then the parts with lower heat. It prioritizes cooling the high-temperature areas, can quickly absorb and remove the core heat, prevent local overheating, control the temperature rise, and improve cooling efficiency. The hot-then-cold path from top to bottom makes the cooling process present a gradual temperature drop trend, which helps to reduce the uneven thermal expansion and contraction caused by excessive instantaneous temperature difference in the inner roller 201, thereby reducing thermal stress and deformation and maintaining structural stability.

[0029] When the outer roller 1 and ceramic ring 212 rotate relative to the inner roller 201, the spring 207 pushes the graphite ring 209 tightly against the ceramic ring 212 through elasticity. The graphite ring 209 and ceramic ring 212 fit together to form a dynamic sealing pair. The graphite ring 209 is a self-lubricating material with a low coefficient of friction and strong wear resistance. The spring 207 device can automatically compensate for the wear caused by long-term operation, extend the service life of the sealing components, reduce the maintenance frequency, and effectively prevent the leakage of internal coolant. The mounting ring 208 is slidably connected to the limiting groove 6 on the side wall of the inner roller 201, so that it can only move in a limited direction in the axial or radial direction, thereby ensuring that the graphite ring 209 always maintains accurate docking with the ceramic ring 212 under the elastic force of the spring 207, preventing deviation or dislocation.

[0030] In addition, a connecting frame 3 is fixedly connected to the inner wall of the outer roller 1, and a through hole 4 is fixedly connected to the side wall of the connecting frame 3. A ceramic sheet 5 is fixedly connected to the inner wall of the connecting frame 3. The connecting frame 3 provides support between the outer roller 1 and the inner roller 201, enhancing the structural stability between the outer roller 1 and the inner roller 201, preventing the inner roller 201 from shaking or becoming eccentric under high-speed rotation or high-temperature environment, and ensuring the overall smoothness and coaxiality of the roller conveyor system. The connecting frame 3 is fixed to the inner wall of the outer roller 1 and provides structural support between the outer roller 1 and the inner roller 201, enabling the inner roller 201 to withstand high temperature and high load conditions. During operation, the connecting frame 3 is fixedly connected to a ceramic plate 5 to maintain a stable axial position. The ceramic plate 5 has good wear resistance and low friction coefficient, which can significantly reduce the friction force when the inner and outer rollers 1 rotate relative to each other, reduce the wear of the mating surfaces, and extend the service life of the system. The side wall of the connecting frame 3 is provided with a through hole 4, which allows the cooling oil to flow freely between the outer roller 1 and the inner roller 201, ensuring the uniform distribution and effective circulation of the cooling medium, improving heat dissipation efficiency, preventing local overheating, and thus enhancing the operational stability and cooling effect of the entire roller conveyor system at high temperatures.

[0031] In this invention, during use, cooling oil is filled between the outer roller 1 and the inner roller 201, and the interior of the inner roller 201 is filled with coolant. Heat is transferred from top to bottom into the inner roller 201. Cooling water enters the inner roller 201 through the water inlet pipe 203 and then enters the cooling pipe 204. The horseshoe-shaped cooling pipe 204 allows the coolant to flow first to the top of the inner roller 201 and then to the bottom of the inner roller 201, passing through the areas with higher heat first and then the areas with lower heat, prioritizing the cooling of high-temperature areas. This allows for rapid absorption and removal of core heat, preventing localized overheating. When the outer roller 1 and the ceramic ring 212 rotate relative to the inner roller 201, the spring 207 elastically pushes the graphite ring 209 to tightly abut against the ceramic ring 212. The graphite ring 209 and the ceramic ring 212 fit together to form a dynamic sealing pair. The spring 207 device can automatically compensate for wear caused by long-term operation, extend the service life of the sealing components, reduce maintenance frequency, and effectively prevent internal coolant leakage.

[0032] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A hot stove cantilever roll with water cooling structure comprising an outer roll (1), characterized in that: The outer roller (1) is internally provided with a cooling assembly (2), which includes: An inner roller (201) has a sealing plug (202) inserted into its inner wall. A water inlet pipe (203) is inserted into the side wall of the sealing plug (202). A cooling pipe (204) is fixedly connected to the side wall of the water inlet pipe (203). A water outlet pipe (205) is fixedly connected to the end of the cooling pipe (204) away from the water inlet pipe (203). A trapezoidal ring (206) is provided with a spring (207) fixedly connected to its side wall. An installation ring (208) is fixedly connected to the end of the spring (207) away from the trapezoidal ring (206). A graphite ring (209) is fixedly connected to the side wall of the installation ring (208). A limiting ring (210) is provided, and a ceramic ring (212) is fixedly connected to the side wall of the limiting ring (210).

2. The hot stove cantilever roller with water cooling structure according to claim 1, characterized in that: A ceramic bearing (7) is fixedly connected to the outer wall of the inner roller (201). The ceramic bearing (7) includes an inner ring and an outer ring. The outer wall of the inner roller (201) is fixedly connected to the inner ring, and the outer wall of the outer ring is fixedly connected to the inner wall of the outer roller (1).

3. The hot stove cantilevered roller with water cooling structure according to claim 1, characterized in that: The outer wall of the outer roller (1) is fixedly connected to a ceramic bearing (8), which includes an inner ring and an outer ring. The outer wall of the outer roller (1) is fixedly connected to the inner ring, and the outer wall of the outer ring is fixedly connected to a fixing frame (9). The fixing frame (9) is fixedly connected to a sealing plug (202).

4. The hot stove cantilevered roller with water cooling structure according to claim 1, characterized in that: The cooling pipe (204) is provided in several groups, with each two cooling pipes (204) forming a group. Several groups of cooling pipes (204) are equally spaced on the outer wall of the water inlet pipe (203). Each group of cooling pipes (204) is arranged in a horseshoe shape. The water outlet pipe (205) is inserted into the sealing plug (202).

5. A furnace cantilever roller with a water-cooled structure according to claim 1, characterized in that: The trapezoidal ring (206) is fixedly connected to the inner wall of the inner roller (201), and a limiting groove (6) is provided on the side wall of the inner roller (201). The limiting groove (6) is slidably connected to the mounting ring (208).

6. The hot stove cantilevered roller with water cooling structure according to claim 1, characterized in that: The limiting ring (210) is fixedly connected to the inner wall of the outer roller (1), and the ceramic ring (212) abuts against the graphite ring (209).

7. The hot stove cantilevered roller with water cooling structure according to claim 1, characterized in that: The inner wall of the outer roller (1) is fixedly connected to a connecting frame (3), the side wall of the connecting frame (3) is fixedly connected to a through hole (4), and the inner wall of the connecting frame (3) is fixedly connected to a ceramic sheet (5).

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