Static steel sleeve steel roller

Abstract

The utility model relates to the technical field of rollers, in particular to a static steel sleeve steel roller which comprises an inner layer roller body, an outer layer roller body covers the inner layer roller body in a surrounding mode, a roller shaft module is coaxially fixed in the inner layer roller body and comprises an outer barrel shaft and an inner barrel shaft, and the inner barrel shaft is coaxially fixed in the outer barrel shaft. The two ends of the outer barrel shaft are each rotationally provided with a sealing cover, each sealing cover is provided with a liquid conveying pipe, a fixed shaft is rotationally installed between the two sealing bases, a plurality of notches are formed in the inner barrel shaft in the circumferential direction in a penetrating mode, each notch is fixedly covered with an elastic skin, and magnetic induction pieces are fixed to the elastic skins. And a magnet corresponding to the fixed shaft is fixed on the fixed shaft. By arranging the inner barrel shaft, the outer barrel shaft and the like, cooling water can only flow through a gap between the outer barrel shaft and the inner barrel shaft, the cooling water can be closer to the roller body in the flowing process, and therefore better heat exchange efficiency is obtained, and cooling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill technology, and in particular to a static steel-clad steel rolling mill roll. Background Technology

[0002] Static steel-clad steel rolls are a type of composite roll. Their core feature lies in the static casting process that combines different steel materials into an inner and outer jacket structure. Specifically, both the outer layer and the inner core of the roll are made of steel, and a metallurgical bonding process is used to form a composite structure. This design retains the strength advantages of steel while optimizing the overall performance of the roll through layering. Existing static steel-clad steel rolls are mainly used in high-precision, high-load applications such as support rolls in medium and heavy plate mills. This results in the generation of more heat during roll operation. Current static steel-clad steel rolls primarily dissipate heat through air cooling or cooling water within the roll shaft. Air cooling has limited effectiveness, and the cooling water circulation system requires a water pump or high-pressure water supply, which is quite limiting. Furthermore, some cooling water cannot maintain efficient heat exchange with the inner wall of the roll shaft as it passes through, resulting in insufficient cooling efficiency. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing heat dissipation measures, which are highly dependent on effectiveness and have significant limitations, and to propose a static steel-clad steel roll.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Design a static steel-clad steel roll, comprising an inner roll body, an outer roll body surrounding and covering the inner roll body, the inner and outer roll bodies being metallurgically bonded, an outer cylinder shaft coaxially fixed within the inner roll body, and an inner cylinder shaft coaxially fixed within the outer cylinder shaft, sealing seats fixed at both ends of the inner cylinder shaft, and a sealing cap rotatably mounted at both ends of the outer cylinder shaft, each sealing cap having an infusion tube provided on it, a fixed shaft rotatably mounted between the two sealing seats, the fixed shaft having both ends extending outward through the sealing caps; the inner cylinder shaft having several slots through it, each slot being covered and fixed with an elastic skin, a magnetic sheet fixed on the elastic skin, and a corresponding magnet fixed on the fixed shaft.

[0006] Preferably, the outer roller body is made of high-carbon high-chromium steel or hard chrome plated.

[0007] Preferably, the inner roller body is made of medium carbon steel or low alloy steel.

[0008] Preferably, the outer cylinder shaft and the inner cylinder shaft are further fixedly connected by several reinforcing rings, and each reinforcing ring has several water-permeable holes that are circumferentially opened.

[0009] Preferably, each of the two infusion tubes is equipped with a check valve, and the two check valves operate in opposite directions.

[0010] Preferably, the elastic skin is made of non-metallic fabric skin.

[0011] Preferably, the outer roller body surface is further provided with a wear-resistant layer.

[0012] Preferably, the magnetic sheet is an iron sheet.

[0013] The static steel-clad steel roll proposed in this utility model has the following advantages:

[0014] By incorporating an inner and outer cylinder shaft, cooling water can only flow through the gap between the outer and inner cylinder shafts. This allows the cooling water to flow closer to the roller body, resulting in better heat exchange efficiency and improved cooling efficiency. Furthermore, an elastic skin is installed on the groove on the surface of the inner cylinder shaft. When the entire roll rotates, the fixed shaft does not rotate. The rotating inner cylinder shaft drives the elastic skin and magnetic plates on it to rotate continuously. During the rotation, the magnetic plates intermittently interact with the magnets on the fixed shaft, causing the elastic skin to be intermittently stretched and contracted. This repeatedly changes the pressure state within the gap between the outer and inner cylinder shafts, thereby achieving automatic intake and discharge of cooling water without relying on water pumps or high-pressure water supply, making the layout more flexible. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a static steel-jacketed steel roll proposed in this utility model;

[0016] Figure 2 This invention provides a schematic diagram of the internal structure of a static steel-jacketed steel roll. Figure 2 ;

[0017] Figure 3 This is a top view schematic diagram of a static steel-clad steel roll proposed in this utility model;

[0018] Figure 4 for Figure 3 A schematic diagram of the AA-section cross-section structure;

[0019] Figure 5 for Figure 4 A schematic diagram of the partial structure at point A;

[0020] Figure 6 for Figure 4 A schematic diagram of the local structure at point B.

[0021] In the diagram: 1. Inner roller body; 2. Outer roller body; 3. Outer cylinder shaft; 4. Inner cylinder shaft; 5. Reinforcing ring; 6. Sealing seat; 7. Sealing cover; 8. Fixed shaft; 9. Infusion tube; 10. Groove; 11. Elastic skin; 12. Magnetic sheet; 13. Magnet; 14. Check valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-6 A static steel-clad steel roll includes an inner roll body 1, an outer roll body 2 surrounding and covering the inner roll body 1, the inner roll body 1 and the outer roll body 2 are metallurgically bonded, an outer cylinder shaft 3 is coaxially fixed inside the inner roll body 1, an inner cylinder shaft 4 is coaxially fixed inside the outer cylinder shaft 3, and a gap is left between the inner wall of the outer cylinder shaft 3 and the inner wall of the inner cylinder shaft 4 so that cooling water can flow through the gap between the two. Sealing seats 6 are fixed at both ends of the inner cylinder shaft 4 to seal the ends of the inner cylinder shaft 4, preventing cooling water from entering the inner cylinder shaft 4. A sealing cover 7 is rotatably mounted at each end of the outer cylinder shaft 3, and each sealing cover 7 is equipped with a liquid inlet pipe 9. A fixed shaft 8 is rotatably mounted between the two sealing seats 6, with both ends of the fixed shaft 8 extending outwards through the sealing covers 7. Several slots 10 are circumferentially opened on the inner cylinder shaft, and each slot 10 is covered and fixed with an elastic skin 11. A magnetic sheet 12, made of iron, is fixed on the elastic skin 11. A corresponding magnet 13 is fixed on the fixed shaft 8.

[0024] The outer roll body 2 is made of high-carbon, high-chromium steel or hard chrome plated. This improves surface wear resistance and corrosion resistance, making it suitable for high-load rolling applications. A wear-resistant layer is also provided on the outer surface of the outer roll body 2.

[0025] The inner roller body 1 is made of medium carbon steel or low alloy steel. Through metallurgical bonding, it forms a stable composite structure with the outer roller body 2, enhancing the overall impact resistance and fatigue strength.

[0026] The outer cylinder shaft 3 and the inner cylinder shaft 4 are also fixedly connected by several reinforcing rings 5, each of which has several water-permeable holes extending circumferentially. The reinforcing rings 5 ​​can enhance the connection between the outer cylinder shaft 3 and the inner cylinder shaft 4.

[0027] Each of the two infusion tubes 9 is equipped with a check valve 14, and the two check valves 14 operate in opposite directions. One check valve 14 is used to prevent external liquid from entering the infusion tube 9, and the other check valve 14 is used to prevent liquid from flowing out of the infusion tube 9. The two check valves 14 cooperate with each other. When the elastic skin 11 is stretched, one check valve 14 opens and the other check valve 14 closes, allowing external cooling water to be drawn in; conversely, it discharges the cooling water.

[0028] The elastic skin 11 is made of non-metallic fabric. This non-metallic fabric skin is composed of multiple layers of non-metallic materials with different functions, such as fiberglass cloth, silicone rubber, and polytetrafluoroethylene. Each layer performs a specific function, ensuring stability and durability. It has good elasticity, adapting to length changes at different temperatures, reducing stress, and can withstand high operating temperatures, typically between -50℃ and +1000℃, meeting the needs of various industrial environments. Due to the use of special non-metallic materials, it has excellent chemical corrosion resistance, resisting the erosion of various chemicals.

[0029] The outer roller body 2 of this invention uses high-hardness alloy steel, such as high-carbon high-chromium steel, to improve wear resistance, while the inner roller body 1 uses tough steel to ensure overall strength, solving the problem of insufficient surface hardness in traditional steel rolls. The inner roller body 1 and outer roller body 2 are metallurgically bonded to avoid the risk of layer separation and ensure structural stability. Simultaneously, the inner roller body 1 is also equipped with a roller shaft module that allows cooling water to flow through. During use, this roller shaft module fixes the fixed shaft 8. When the entire roll rotates, the fixed shaft 8 does not rotate. At this time, the rotating inner cylinder shaft drives the elastic skin 11 and the magnetic sheet 12 on it to rotate continuously. During the rotation, the magnetic sheet 12 intermittently interacts with the magnet on the fixed shaft 8, causing the elastic skin 11 to intermittently rotate. When the elastic skin 11 is stretched inward, the pressure in the gap between the outer cylinder shaft 3 and the inner cylinder shaft 4 decreases. At this time, external cooling water is drawn into the gap between the inner cylinder shaft 4 and the outer coaxial shaft through a liquid inlet pipe 9, thereby absorbing the heat generated by the entire roll. When the elastic skin 11 contracts outward, the pressure in the gap between the outer cylinder shaft 3 and the inner cylinder shaft 4 increases. At this time, the cooling water is discharged through another liquid inlet pipe 9. This can automatically realize the circulation of cooling water. Furthermore, since the cooling water can only flow through the gap between the outer cylinder shaft 3 and the inner cylinder shaft 4, it avoids the cooling water flowing directly through the middle of the roll shaft, allowing the cooling water to be closer to the roll body itself, thereby obtaining better heat exchange efficiency.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A static steel-in-steel roll comprising an inner roll body (1), characterized in that, The inner layer roller body (1) is covered by the outer layer roller body (2), the inner layer roller body (1) and the outer layer roller body (2) are combined by metallurgy, the outer cylinder shaft (3) is fixed in the inner layer roller body (1) coaxially, the inner cylinder shaft (4) is fixed in the outer cylinder shaft (3) coaxially, the sealing seat (6) is fixed at the both ends of the inner cylinder shaft (4), the sealing cover (7) is rotatably installed at the both ends of the outer cylinder shaft (3), the infusion tube (9) is arranged on the sealing cover (7), the fixed shaft (8) is rotatably installed between the two sealing seats (6), the fixed shaft (8) penetrates the sealing cover (7) outward at the both ends, the slot (10) is arranged on the inner cylinder shaft (4), the elastic skin (11) is fixed on the slot (10), the magnetic sheet (12) is fixed on the elastic skin (11), the magnet (13) is fixed on the fixed shaft (8).

2. The static steel backed steel roll according to claim 1, characterized in that, The outer layer roller body (2) is made of high-carbon high-chromium steel or plated hard chromium.

3. The static steel backed steel roll of claim 1 wherein, The inner layer roller body (1) is made of medium-carbon steel or low-alloy steel.

4. The static steel backed steel roll of claim 1 wherein, The outer cylinder shaft (3) and the inner cylinder shaft (4) are fixedly connected by the reinforcing ring (5), the water-permeable holes are arranged on the reinforcing ring (5) circumferentially.

5. The static steel backed steel roll of claim 1 wherein, The check valve (14) is installed in the infusion tube (9), and the working directions of the two check valves (14) are opposite.

6. The static steel backed steel roll of claim 1 wherein, The elastic skin (11) is made of non-metal fabric skin.

7. The static steel backed steel roll of claim 1 wherein, The outer surface of the outer layer roller body (2) is provided with the wear-resistant layer.

8. The static steel backed steel roll of claim 1 wherein, The magnetic sheet (12) is the iron sheet.

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