Calendering roller of steel calender

Abstract

The utility model relates to the technical field of steel calendaring, in particular to a calendaring roller of a steel calendaring machine, which comprises a roller body, the roller body comprises a martensitic stainless steel layer and a ceramic fiber layer, a water cavity is arranged between the martensitic stainless steel layer and the ceramic fiber layer, two ends of the roller body are sealed through sealing plates, and connecting rods are arranged on the outer sides of the sealing plates. A cavity is formed in the ceramic fiber layer, a water pump is arranged at one end in the cavity, the water pumping end of the water pump is connected with a first water pipe penetrating into the water cavity, the water drainage end of the water pump penetrates to the outer side of one connecting rod through a second water pipe, and a water injection pipe extending into the cavity is rotationally connected into the other connecting rod. The martensitic stainless steel layer and the ceramic fiber layer are supported through a plurality of supporting frames with drainage grooves, and a plurality of through grooves are formed in the ceramic fiber layer. According to the utility model, the working calender roll can be cooled, the overheating condition caused by long-time working of the calender roll is prevented, the service life of equipment is prolonged, and the steel calendering treatment effect is improved.

Description

Technical Field

[0001] This utility model relates to a calendering roll, and more particularly to a calendering roll for a steel calendering machine, belonging to the field of steel calendering technology. Background Technology

[0002] The rolling rolls of a steel rolling mill are one of the core components of the mill, playing a crucial role in the steel rolling process. During steel processing, steel undergoes rolling. In this process, the rolling rolls rotate and apply pressure, causing the steel to undergo plastic deformation, thereby reducing thickness, increasing width, and improving surface quality.

[0003] When rolling steel, the rolling rolls rub against the steel continuously. After a long period of friction, the temperature on the surface of the rolling rolls will rise rapidly. The sustained high temperature will accelerate the wear of the rolling rolls and other equipment, shortening the service life of the equipment. At the same time, the high temperature may also cause thermal deformation of the equipment, affecting the rolling accuracy and stability. Excessive surface temperature of the rolling rolls will cause the steel to be heated for a longer time during the rolling process, reducing the strength, toughness and plasticity of the steel, and affecting its mechanical properties. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a calendering roll for a steel calendering machine that can cool and reduce the temperature of the roll body.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A rolling roll for a steel rolling mill includes a roll body comprising a martensitic stainless steel layer and a ceramic fiber layer arranged sequentially from the outside to the inside. A water cavity is provided between the martensitic stainless steel layer and the ceramic fiber layer. Both ends of the roll body are sealed by sealing plates. A connecting rod is provided on the outside of the sealing plates. A cavity is formed inside the ceramic fiber layer. A water pump is provided at one end of the cavity. The pump's suction end is connected to a first water pipe that penetrates into the water cavity. The pump's discharge end is connected to the outside of one of the connecting rods via a second water pipe. A water injection pipe extending into the cavity is rotatably connected inside the other connecting rod. The martensitic stainless steel layer and the ceramic fiber layer are supported by several support frames with drainage grooves. Several through grooves are formed on the ceramic fiber layer.

[0007] Furthermore, the surface of the martensitic stainless steel layer is coated with a chromium plating layer, the inner wall of the ceramic fiber layer is provided with a nanoporous metal layer, and the through groove also penetrates the nanoporous metal layer.

[0008] Furthermore, support plates are provided on both the upper and lower end faces of the support frame, and the two support plates are fixedly connected to the inner wall of the martensitic stainless steel layer and the outer wall of the ceramic fiber layer, respectively.

[0009] Furthermore, a support rod for fixing the water pump is provided inside the cavity, and a counterweight is provided at the end of the cavity away from the water pump.

[0010] Furthermore, one of the connecting rods has a rotating hole, and the water injection pipe is connected to the rotating hole through a bearing. The outer end of the water injection pipe is provided with a connecting ring for connecting an external water pump.

[0011] Furthermore, one of the sealing plates has a water injection hole, which is sealed by a sealing plug.

[0012] Furthermore, one of the sealing plates is provided with a vertical pointer, which is parallel to the first water pipe, and the sealing plate and the roller are sealed by welding.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This application utilizes a combination of martensitic stainless steel layer, ceramic fiber layer, and nanoporous metal layer to provide the calendering roll with excellent thermal conductivity and insulation during operation. Furthermore, the inclusion of a water cavity, air cavity, water pump, first water pipe, second water pipe, drainage trough, and through groove allows the coolant entering the roll body to cool it, effectively preventing excessive heat buildup during prolonged operation. This helps extend the equipment's lifespan and improve the steel calendering process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the semi-sectional three-dimensional structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the present utility model;

[0017] Figure 3 This is a schematic diagram showing the location of the cooling water in this utility model;

[0018] Figure 4 This is a cross-sectional schematic diagram of the present invention;

[0019] Figure 5 This is a partial three-dimensional structural diagram of the present invention.

[0020] In the diagram, 1. Martensitic stainless steel layer; 2. Ceramic fiber layer; 3. Water cavity; 4. Sealing plate; 5. Cavity; 6. Water pump; 7. Connecting rod; 8. First water pipe; 801. Second water pipe; 802. Water injection pipe; 9. Drainage trough; 10. Support frame; 11. Through groove; 12. Nanoporous metal layer; 13. Support plate; 14. Support rod; 15. Counterweight; 16. Rotating hole; 17. Bearing; 18. Connecting ring; 19. Water injection hole; 20. Sealing plug; 21. Vertical pointer. Detailed Implementation

[0021] The technical solution of this utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1-5 As shown, the steel rolling mill roll provided in this embodiment includes a roll body, which includes a martensitic stainless steel layer 1 and a ceramic fiber layer 2 arranged sequentially from the outside to the inside. The ceramic fiber layer 2 has extremely low thermal conductivity, which significantly reduces heat transfer efficiency and is resistant to high temperatures (up to 1200°C or higher). It is suitable for the high-temperature working environment of the roll and is lightweight, which reduces the overall weight of the roll and reduces energy consumption. It can be selected as an internal interlayer or filling material for the roll to form a thermal barrier. It can be combined with the metal matrix to enhance the structural strength.

[0023] The surface of the martensitic stainless steel layer 1 is coated with a chromium plating layer. After chromium plating, the performance of the martensitic stainless steel layer 1, which already has high wear resistance and high strength, is further improved. At the same time, the thermal conductivity is improved to prevent heat from entering the interior and affecting the use of the internal structure. Specifically, the hardness of the chromium plating layer is usually between HV 800-1200, which is much higher than that of ordinary steel. The high hardness enables the chromium plating layer to effectively resist scratches, grooves and cutting during the wear process, reduce the loss of base material and protect the internal material from wear.

[0024] Thermal conductivity: Chromium has a thermal conductivity of approximately 93.7 W / (m·K), which is higher than that of many other metal materials. This high thermal conductivity allows the chromium plating layer to quickly conduct heat from the contact surface to the base material, and then conduct the heat out through the cooling system, thus accelerating heat transfer.

[0025] The inner wall of the ceramic fiber layer 2 is selectively provided with a nanoporous metal layer 12, which reduces heat conduction through the nanoscale pore structure and serves as an internal structural layer of the pressure roller, replacing part of the metal matrix.

[0026] A water cavity 3 is provided between the martensitic stainless steel layer 1 and the ceramic fiber layer 2. Both ends of the roller are sealed by sealing plates 4. A connecting rod 7 is provided on the outside of the sealing plate 4. A cavity 5 is opened in the ceramic fiber layer 2. A water pump 6 is provided at one end of the cavity 5. A support rod 14 for fixing the water pump 6 is provided inside the cavity 5. A counterweight 15 is provided at the end of the cavity 5 away from the water pump 6. The counterweight 15 helps to maintain the balance of the roller when it rotates.

[0027] The pump 6 has a first water pipe 8 connected to its pumping end, which extends into the water chamber 3. The pump 6 has a second water pipe 801 that extends through to the outside of one of the connecting rods 7. The other connecting rod 7 has a water injection pipe 802 rotatably connected to it, extending into the cavity 5. One of the connecting rods 7 has a rotating hole 16. The water injection pipe 802 is connected to the rotating hole 16 via a bearing 17, ensuring that the water injection pipe 802 rotates without rotating synchronously with the connecting rod 7 or the roller. The outer end of the water injection pipe 802 has a connecting ring 18 for connecting to an external water pump. A water injection hole 19 is provided on the sealing plate 4. The water injection hole 19 is sealed by a sealing plug 20. Water can be injected into the roller body through the water injection hole 19. The sealing plug 20 is used to seal the water injection hole 19 to prevent leakage. The water injection pipe 802 and the water injection hole 19 enable the present invention to have two cooling methods. One is to inject coolant through the water injection hole 19. When the roller rotates, the coolant is always kept in the lower layer of the water cavity 3 due to its own weight, thereby contact cooling the outer martensitic stainless steel layer 1. It can be pumped out and replaced later by the water pump 6.

[0028] Secondly, during use, the connecting ring 18 is connected to an external water pump, and external cooling water is injected into the cavity 5 through the external water pump and the water injection pipe 802. The water enters the water cavity 3 through several through slots 11. When the roller rotates, the cooling water remains in the lower layer of the water cavity 3 due to its own weight, thereby cooling the outer martensitic stainless steel layer 1. While water is being injected, the water pump 6 at the other end intermittently discharges the water in the water cavity 3, thereby achieving the circulation and pumping of cooling water and improving the cooling effect. The cooling liquid is preferably water, but other liquid cooling media can also be selected.

[0029] Furthermore, one of the sealing plates 4 is equipped with a vertical pointer 21, which is parallel to the first water pipe 8. This ensures that during drainage, the first water pipe 8 is positioned vertically downwards by observing the external vertical pointer 21, thereby drawing out and discharging the cooling water from the lower layer. The sealing plate 4 is welded to the roller body to ensure its sealing effect. During the processing of the internal structure of the roller body, the sealing plate 4 is in an unsealed state. After processing, the sealing plate 4 is sealed. If damage occurs inside, the weld seam of the sealing plate 4 can be cut off.

[0030] The martensitic stainless steel layer 1 and the ceramic fiber layer 2 are supported by several support frames 10 with drainage grooves 9. The upper and lower end faces of the support frame 10 are provided with support plates 13. The two support plates 13 are fixedly connected to the inner wall of the martensitic stainless steel layer 1 and the outer wall of the ceramic fiber layer 2, respectively. The use of support plates 13 can greatly improve the contact surface at both ends of the support frame 10, improve the support effect on the outer martensitic stainless steel layer 1, and prevent deformation during rolling. Several through grooves 11 are opened on the ceramic fiber layer 2, which also penetrate the nanoporous metal layer 12 to ensure that the coolant entering the cavity 5 flows smoothly into the water cavity 3.

[0031] The foregoing description illustrates and describes preferred embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein. Any modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A rolling roll for a steel rolling mill, characterized in that, The roller body includes a martensitic stainless steel layer (1) and a ceramic fiber layer (2) arranged sequentially from the outside to the inside. A water cavity (3) is provided between the martensitic stainless steel layer (1) and the ceramic fiber layer (2). Both ends of the roller body are sealed by a sealing plate (4). A connecting rod (7) is provided on the outside of the sealing plate (4). A cavity (5) is opened in the ceramic fiber layer (2). A water pump (6) is provided at one end of the cavity (5). The pumping end of the water pump (6) is connected to a through-hole. The first water pipe (8) inside the water cavity (3) is connected to the outside of one of the connecting rods (7) through the second water pipe (801) of the water pump (6). The other connecting rod (7) is rotatably connected to the water injection pipe (802) extending into the cavity (5). The martensitic stainless steel layer (1) and the ceramic fiber layer (2) are supported by several support frames (10) with drainage grooves (9). Several through grooves (11) are opened on the ceramic fiber layer (2).

2. The rolling roll of a steel rolling mill according to claim 1, characterized in that: The surface of the martensitic stainless steel layer (1) is coated with a chromium plating layer, and the inner wall of the ceramic fiber layer (2) is provided with a nanoporous metal layer (12). The through groove (11) also penetrates the nanoporous metal layer (12).

3. The rolling roll of a steel rolling mill according to claim 1, characterized in that: The upper and lower ends of the support frame (10) are provided with support plates (13), and the two support plates (13) are fixedly connected to the inner wall of the martensitic stainless steel layer (1) and the outer wall of the ceramic fiber layer (2), respectively.

4. The rolling roll of a steel rolling mill according to claim 1, characterized in that: The cavity (5) is provided with a support rod (14) for fixing the water pump (6), and a counterweight (15) is provided at the end of the cavity (5) away from the water pump (6).

5. The rolling roll of a steel rolling mill according to claim 1, characterized in that: One of the connecting rods (7) has a rotating hole (16) inside, and the water injection pipe (802) is connected to the rotating hole (16) through a bearing (17). The outer end of the water injection pipe (802) is provided with a connecting ring (18) for connecting an external water pump.

6. The rolling roll of a steel rolling mill according to claim 1, characterized in that: One of the sealing plates (4) has a water injection hole (19), which is sealed by a sealing plug (20).

7. The rolling roll of a steel rolling mill according to claim 1, characterized in that: One of the sealing plates (4) is provided with a vertical pointer (21), which is parallel to the first water pipe (8), and the sealing plate (4) is sealed to the roller body by welding.

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