Vertical roll device of rolling mill

Abstract

The invention relates to a rolling mill vertical roll device, and relates to the technical field of steel rolling, the rolling mill vertical roll device comprises a fixed cross beam, and a vertical roll, a lead screw, a worm gear and a balance hydraulic cylinder which are mounted on the fixed cross beam, the lead screw is arranged in the worm gear in a penetrating manner and is in threaded connection with the worm gear, and the worm gear is rotationally arranged; the lead screw penetrates out of one end of the worm wheel and is in contact connection with the vertical roller, the balance hydraulic cylinder is provided with a piston rod, and the piston rod penetrates through the lead screw and is connected with the vertical roller; the piston rod is driven by the balance hydraulic cylinder to be tensioned, and gaps between the vertical roll and the lead screw and gaps between the lead screw and the worm gear are eliminated. The piston rod is driven by the balance hydraulic cylinder to move and is automatically tensioned, so that gaps between the lead screw and the worm gear and between the lead screw and the vertical roll are eliminated; the problem of roll gap jumping of the vertical roll of the rolling mill is solved, the roll gap accuracy of the vertical roll of the rolling mill is improved, the adjusting time is shortened, the step of manually checking the roll gap through a filler gauge is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of steel rolling, and in particular to a vertical roll device of a rolling mill. Background Art

[0002] In recent years, with the rapid development of my country's economy and the continuous improvement of people's consumption level, the demand for steel in infrastructure construction fields such as construction, transportation, and energy has continued to increase. In particular, hot-rolled H-shaped steel, as an important steel profile, has gradually become an indispensable key material in modern construction projects due to its wide application in civil construction, industrial construction, bridge construction, petroleum industry, high-rise buildings, underground railways, and mine tunnels. H-shaped steel has excellent performance in mechanical properties, compression and bending resistance, and is therefore widely used in many industries. At the same time, the government has continuously increased its investment in infrastructure construction, which has promoted the rapid development of the steel production industry.

[0003] As the demand for steel sections continues to rise, companies that produce steel sections are facing higher production and production efficiency requirements. Especially in the production process of hot-rolled H-shaped steel, how to ensure the accuracy and stability of the rolling process has become a key factor in improving production efficiency and product quality. For the short-stress rolling mill used in the production process of H-shaped steel, the stability of the roll gap of the vertical roller directly affects the rolling quality of the H-shaped steel and the thickness uniformity of the finished product. However, there are certain challenges in adjusting and controlling the roll gap of the vertical roller, especially at the connection pin between the vertical roller and the lead screw. Due to the gap problem of the threaded pair, the roll gap is prone to instability during the rolling process, resulting in a jumping phenomenon, which affects the thickness consistency of the rolled product and even causes impact on the mill body and damages the equipment.

[0004] At present, in order to reduce or eliminate the gap between the thread pairs, the traditional rolling mill design adopts a combination of hydraulic motor transmission and worm system. The hydraulic motor drives the worm wheel to rotate the worm wheel to adjust the position of the vertical roller. However, in practical applications, the gap problem of the thread pair always exists, and it will be aggravated by the vibration and load fluctuation during the rolling process, resulting in the jump of the roll gap and difficulty in maintaining stability. In order to solve this problem, the design usually adds disc springs and balance nuts at the screw and worm wheel to balance the gap of the thread pair. However, although this method can reduce the impact caused by the gap, it still cannot completely eliminate the instability of the vertical roller gap. Although the disc spring itself has a certain elasticity, it is easy to fail under long-term high load and high-speed operation, resulting in a weakened balancing effect, which causes the instability of the finished product size and affects the product quality.

[0005] Therefore, there is an urgent need to develop a more reliable, durable and efficient roll gap adjustment and balancing device to ensure stability during the rolling process, shorten the adjustment time, reduce the steps of manual feeler gauge inspection of the roll gap, and reduce production costs. Summary of the invention

[0006] In order to develop a more reliable, durable and efficient roll gap adjustment and balancing device, the present application provides a rolling mill vertical roll device.

[0007] The present application provides a rolling mill vertical roller device adopts the following technical solution: A rolling mill vertical roller device comprises a fixed crossbeam and a vertical roller mounted on the fixed crossbeam, a lead screw, a worm gear, and a balancing hydraulic cylinder, wherein the lead screw is inserted into the worm gear and is threadedly connected to the worm gear, the worm gear is rotatably arranged, one end of the lead screw passing through the worm gear is in contact and connected with the vertical roller, the balancing hydraulic cylinder is provided with a piston rod, and the piston rod passes through the lead screw and is connected to the vertical roller; the piston rod is driven by the balancing hydraulic cylinder to be tightened to eliminate the gap between the vertical roller and the lead screw, and between the lead screw and the worm gear.

[0008] By adopting the above technical solution, when the worm gear is driven to rotate by the driving system, the lead screw is driven to move linearly, thereby adjusting the position of the vertical roller and changing the width or height of the roll gap. In this process, gaps are likely to appear between the lead screw and the worm gear, as well as between the lead screw and the vertical roller. When a gap appears, the piston rod is driven to move by the balancing hydraulic cylinder, and the piston rod is automatically tightened, thereby eliminating the gap between the lead screw and the worm gear, and between the lead screw and the vertical roller; the roll gap jump or instability caused by the gap in the traditional design is avoided, the quality instability of the rolled product caused by the gap fluctuation is reduced, and the thickness uniformity and mechanical property consistency of the product are ensured; the solution realizes automated roll gap adjustment, reduces manual feeler gauge detection, manual adjustment and other steps, saves adjustment time, and improves the overall efficiency of the production line; and can reduce the failure risk of components such as disc springs and balancing nuts in traditional devices, thereby reducing maintenance frequency and cost.

[0009] In a specific possible implementation manner, a pressure pad is provided between the lead screw and the vertical roller, and the lead screw is in tight contact with the pressure pad.

[0010] By adopting the above technical solution, in the above design, there is no direct mechanical connection between the vertical roller and the lead screw, but a pressure contact is achieved through a pressure pad. The pressure pad serves as a buffer material and can reduce direct friction, thereby reducing the risk of wear and equipment damage; and during the rolling process, the rolling force is evenly transmitted to the lead screw and the vertical roller through the pressure pad, avoiding the wear and vibration problems caused by uneven contact or concentrated force in the traditional design.

[0011] In a specific possible implementation scheme, the piston rod passes through the lead screw and the pressure pad in sequence and then is inserted into the vertical roller. The piston rod is connected to the vertical roller via a balancing cylinder pin shaft.

[0012] By adopting the above technical solution, the contact force between different components can be accurately controlled under the action of the hydraulic system by using the piston rod to pass through the lead screw, the pressure pad, the vertical roller and connect with the vertical roller through the balancing cylinder pin shaft; the piston rod and the vertical roller are connected by the balancing cylinder pin shaft, so that the piston rod can effectively absorb and transfer the load generated in the rolling process during movement, thereby ensuring the stable operation of the vertical roller under various working conditions.

[0013] In a specific embodiment, it further includes an outer pressure cover, which fixes the worm gear in the fixed beam.

[0014] By adopting the above technical solution, the worm wheel is fixed with an external pressure cover, so that the worm wheel will not be displaced or loosened during operation, thereby avoiding failure of the worm wheel due to changes in axial or radial forces, thereby improving the stability of the transmission system, reducing structural deformation or wear of the worm wheel due to factors such as vibration and load changes during operation, ensuring the reliability and stability of the transmission system, improving the transmission efficiency of the worm wheel, and ensuring the long-term stable operation of the entire device.

[0015] In a specific possible implementation scheme, it also includes a wear-resistant sleeve, which is arranged in the fixed crossbeam and sleeved on the outside of the lead screw, and the wear-resistant sleeve abuts between the worm gear and the outer pressure cover.

[0016] By adopting the above technical solution and utilizing the design of the wear-resistant sleeve, the contact between the worm gear and the outer pressure cover is made smoother, reducing the loosening or misalignment of components caused by vibration or impact force. The wear-resistant sleeve is positioned between the worm gear and the outer pressure cover, playing a role of buffering and shock absorption, reducing the direct contact between the worm gear and other metal parts, thereby reducing the impact of vibration and impact on the system.

[0017] In a specific possible implementation manner, it further includes a wear-resistant pad, which is arranged in the fixed beam and located on the side of the worm wheel away from the outer pressure cover, and the wear-resistant pad abuts against the worm wheel and the fixed beam.

[0018] By adopting the above technical solution and utilizing the design of the wear-resistant pad, the direct wear between the worm gear and the fixed beam can be effectively reduced during rotation, thereby extending the service life of the two components. When the wear-resistant pad contacts the worm gear and the fixed beam, it can effectively disperse pressure and friction, reduce vibration and noise, and thus improve the operating stability of the system and make the equipment run more smoothly.

[0019] In a specific possible implementation scheme, it also includes a hydraulic motor and a worm, wherein the hydraulic motor is connected to the worm and is used to drive the worm to rotate, and the worm is meshingly connected to the worm wheel.

[0020] By adopting the above technical solution, when working, the hydraulic motor provides power through the hydraulic system to drive the worm to rotate, and the worm and the worm wheel are meshed for transmission, so that the worm wheel obtains power and rotates: the transmission method of the worm and the worm wheel enables the transmission system to achieve a larger transmission ratio in a smaller space, saving space and improving system integration, and the meshing transmission of the worm and the worm wheel has a relatively smooth characteristic, reducing mechanical vibration and noise, and improving the stability and durability of the system.

[0021] In a specific possible implementation manner, the lead screw is a hollow lead screw.

[0022] By adopting the above technical solution and the design of a hollow screw, the pipe and piston rod of the balancing hydraulic cylinder can be embedded inside the screw, reducing the complexity of the external structural design, making the entire mechanical system more compact and efficient, while reducing the weight of the equipment.

[0023] In a specific implementation scheme, it also includes a displacement sensor and a control unit. The displacement sensor is used to monitor the displacement data of the piston rod and feed it back to the control unit. The control unit is used to perform real-time analysis on the received displacement data and to adjust the output flow of the balancing hydraulic cylinder.

[0024] By adopting the above technical solution, the electrical signal provided by the displacement sensor can reflect the position change of the piston rod in real time. The control unit immediately adjusts the output flow based on this information. Through precise control, the system can avoid excessive inflow or outflow of hydraulic oil, thereby preventing severe fluctuations or overloads during the operation of the balancing hydraulic cylinder, ensuring the stability and reliability of the hydraulic system during long-term operation.

[0025] In a specific implementation scheme, it also includes an early warning unit, which is electrically connected to the control unit and is used to issue an alarm to remind staff to check or repair.

[0026] By adopting the above technical solution, when the displacement data received by the control unit fluctuates unreasonably, the control unit will feed back information to the early warning unit. At this time, the early warning unit will trigger an alarm based on the received abnormal signal to remind the operator or maintenance personnel to check the equipment. By issuing an early warning at the early stage of abnormal fluctuations, chain reactions caused by single-point failures can be avoided, the risk of major equipment failures can be reduced, the safety and stability of the entire equipment can be improved, the service life of the equipment can be extended, and the stable operation of the equipment during the production process can be ensured.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: the present application utilizes the design of a balancing hydraulic cylinder, a pressure pad, an outer pressure cover, a wear-resistant sleeve, a wear-resistant pad, and a design of an automatic tensioning and adjusting roll gap, and drives its piston rod to move through the balancing hydraulic cylinder to automatically tighten the piston rod, thereby eliminating the gap between the lead screw and the worm gear, and between the lead screw and the vertical roller, solving the problem of roll gap jump of the vertical roller of the rolling mill, avoiding the roll gap jump or instability caused by the gap in the traditional design, reducing the problem of unstable quality of the rolled product caused by the gap fluctuation, and ensuring the thickness uniformity and mechanical property consistency of the product; the present application can realize automatic roll gap adjustment, thereby reducing the steps of manual feeler gauge detection, manual adjustment, etc., saving adjustment time, and improving the overall efficiency of the production line; and it can also reduce the failure risk of components such as disc springs and balancing nuts in traditional devices, thereby reducing maintenance frequency and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the vertical roll device of the rolling mill according to the embodiment of the present application.

[0029] Figure 2 is along Figure 1 The cross-sectional view along line AA is used to show the transmission structure of the worm wheel and worm.

[0030] Figure 3 is along Figure 1 The cross-sectional view along the center BB line is used to show the structure of the worm gear, lead screw, balancing hydraulic cylinder and its piston rod, and vertical roller.

[0031] Explanation of the reference numerals: 1. vertical roller; 2. fixed crossbeam; 3. hydraulic motor; 4. worm gear; 5. worm; 11. balancing cylinder pin; 12. pressure pad; 13. outer pressure cover; 14. wear-resistant sleeve; 15. lead screw; 16. wear-resistant pad; 17. balancing hydraulic cylinder; 18. piston rod. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] Embodiment 1 Reference Figure 1-3 , the embodiment of the present application discloses a rolling mill vertical roll device, in this embodiment, the rolling mill vertical roll device can be but not limited to a universal rolling mill vertical roll 1 balancing device; The vertical roller device of the rolling mill includes a fixed crossbeam 2 and a hydraulic motor 3, a worm 5, a vertical roller 1, a lead screw 15, a worm gear 4, and a balancing hydraulic cylinder 17 installed on the fixed crossbeam 2; the hydraulic motor 3 is connected to the worm 5 and is used to drive the worm 5 to rotate, the worm 5 is meshed and connected with the worm gear 4, the worm 5 and the worm gear 4 are rotatably arranged, the lead screw 15 is penetrated in the worm gear 4 and is threadedly connected with the worm gear 4. In this embodiment, the lead screw 15 moves forward and backward in the horizontal direction, and one end of the lead screw 15 passing through the worm gear 4 is in contact with the vertical roller 1. The balancing hydraulic cylinder 17 is provided with a piston rod 18, and the piston rod 18 passes through the lead screw 15 and is connected with the vertical roller 1; In this embodiment, the lead screw 15 is a hollow lead screw. With the hollow lead screw design, the pipeline and the piston rod 18 of the balancing hydraulic cylinder 17 can be embedded inside the lead screw 15, thereby reducing the complexity of the external structure design, making the entire mechanical system more compact and efficient, and reducing the weight of the equipment; When the roll gap of the vertical roller 1 is adjusted, the hydraulic motor 3 provides power through the hydraulic system to drive the worm 5 to rotate, and the worm 5 meshes with the transmission worm wheel 4, so that the worm wheel 4 obtains power and rotates, thereby driving the lead screw 15 to move linearly, thereby adjusting the position of the vertical roller 1 and changing the width or height of the roll gap; in this process, gaps are likely to appear between the lead screw 15 and the worm wheel 4, and between the lead screw 15 and the vertical roller 1. When gaps appear, the piston rod 18 is driven to move by the balancing hydraulic cylinder 17, and the piston rod 18 is automatically tightened, thereby eliminating the gaps between the lead screw 15 and the worm wheel 4, and between the lead screw 15 and the vertical roller 1; This avoids the roll gap jump or instability caused by the gap in the traditional design, reduces the unstable quality of the rolled product caused by the gap fluctuation, and ensures the thickness uniformity and consistency of the mechanical properties of the product. The design can also realize automatic roll gap adjustment, thereby reducing the steps of manual feeler gauge detection and manual adjustment, saving adjustment time and improving the overall efficiency of the production line. It can also reduce the failure risk of components such as disc springs and balance nuts in traditional devices, thereby reducing maintenance frequency and costs.

[0034] A pressure pad 12 is provided between the lead screw 15 and the vertical roller 1. The lead screw 15 and the vertical roller 1 are not connected, and the lead screw 15 and the vertical roller 1 are in close contact through the pressure pad 12. During operation, if a gap is generated between the lead screw 15 and the vertical roller 1 due to a change in force, the balancing hydraulic cylinder 17 automatically adjusts the length of the piston rod 18, tightens and maintains appropriate contact pressure, eliminates the gap between the lead screw 15 and the vertical roller 1, and ensures that the contact force between the two is always stable. During this process, there is no direct mechanical connection between the vertical roller 1 and the lead screw 15, but they are in close contact through the pressure pad 12. The pressure pad 12 serves as a buffer material to reduce direct friction, thereby reducing the risk of wear and equipment damage.

[0035] The piston rod 18 passes through the hollow structure of the lead screw 15 and the pressure pad 12 in sequence, and then is inserted into the vertical roller 1. The piston rod 18 is connected to the vertical roller 1 through the balancing cylinder pin shaft 11. By designing the balancing cylinder pin shaft 11 to connect the piston rod 18 and the vertical roller 1, the piston rod 18 can effectively absorb and transfer the load generated in the rolling process during movement, thereby ensuring the stable operation of the vertical roller 1 under various working conditions.

[0036] The worm wheel 4 is fixed in the fixed beam 2 by an external pressure cover 13. In the present embodiment, a cavity for installing the worm wheel 4 is provided in the fixed beam 2. The external pressure cover 13 is connected to the fixed beam 2. The external pressure cover 13 closes the cavity to fix the worm wheel 4 in the fixed beam 2; thereby, the worm wheel 4 will not be displaced or loosened during operation, thereby avoiding failure of the worm wheel 4 due to changes in axial or radial forces, thereby improving the stability of the transmission system, reducing structural deformation or wear of the worm wheel 4 caused by vibration, load changes and other factors during operation, ensuring the reliability and stability of the transmission system, improving the transmission efficiency of the worm wheel 4, and ensuring the long-term stable operation of the entire device.

[0037] It also includes a wear-resistant sleeve 14, which is arranged in the cavity of the fixed beam 2 and is sleeved on the outside of the lead screw 15, and the wear-resistant sleeve 14 abuts between the worm gear 4 and the outer pressure cover 13; the design of the wear-resistant sleeve 14 makes the contact between the worm gear 4 and the outer pressure cover 13 more stable, reducing the loosening or misalignment of components caused by vibration or impact force; and the position of the wear-resistant sleeve 14 is between the worm gear 4 and the outer pressure cover 13, which plays a role of buffering and shock absorption, reducing the direct contact between the worm gear 4 and other metal parts, thereby reducing the impact of vibration and impact on the system.

[0038] It also includes a wear-resistant pad 16, which is arranged in the cavity of the fixed beam 2 and is located on the side of the worm gear 4 away from the outer pressure cover 13. The wear-resistant pad 16 abuts against the worm gear 4 and the fixed beam 2; the wear-resistant pad 16 can effectively reduce the direct wear between the worm gear 4 and the fixed beam 2 when the worm gear 4 rotates, and extend the service life of these two components; and when the wear-resistant pad 16 contacts the worm gear 4 and the fixed beam 2, it can effectively disperse pressure and friction, reduce vibration and noise, which not only improves the operating stability of the system, but also makes the equipment run more smoothly.

[0039] The implementation principle of the embodiment of the present application is as follows: when the roll gap of the vertical roller 1 is adjusted, the hydraulic motor 3 provides power through the hydraulic system to drive the worm 5 to rotate, and the worm 5 engages with the transmission worm wheel 4, so that the worm wheel 4 obtains power and rotates, thereby driving the lead screw 15 to move linearly, thereby adjusting the position of the vertical roller 1 and changing the width or height of the roll gap; In this process, a gap is likely to appear between the lead screw 15 and the worm gear 4 and between the lead screw 15 and the vertical roller 1. When a gap appears, the piston rod 18 is driven to move by the balancing hydraulic cylinder 17, and the piston rod 18 is automatically tightened. As the piston rod 18 moves, the vertical roller 1 is pulled to move by the balancing cylinder pin 11, and the vertical roller 1 pulls the pressure pad 12 to move, and the pressure pad 12 is pressed against the end face of the lead screw 15, thereby eliminating the gap between the lead screw 15 and the vertical roller 1; in this process, as the piston rod 18 moves, the pressure pad 12 is pressed against the end face of the lead screw 15, thereby tightening the vertical roller 1, the pressure pad 12, and the lead screw 15 together, thereby eliminating the gap between the lead screw 15 and the worm gear 4; The present application utilizes the design of a balancing hydraulic cylinder 17, a pressure pad 12, an outer pressure cover 13, a wear-resistant sleeve 14, and a wear-resistant pad 16, as well as the design of an automated tensioning and adjusting roll gap, to solve the problem of roll gap jitter in the vertical roll 1 of the rolling mill, avoids roll gap jitter or instability caused by the gap in the traditional design, reduces the problem of unstable quality of the rolled product caused by gap fluctuation, and ensures the uniformity of the thickness of the product and the consistency of the mechanical properties; the present application can realize automated roll gap adjustment, thereby reducing steps such as manual feeler gauge detection and manual adjustment, saving adjustment time, and improving the overall efficiency of the production line; and can also reduce the failure risk of components such as disc springs and balancing nuts in traditional devices, thereby reducing maintenance frequency and costs.

[0040] Embodiment 2 The difference between this embodiment and the first embodiment is that the rolling mill vertical roll device further includes a displacement sensor and a control unit (not shown in the figure). It should be noted that the other structural designs of the rolling mill vertical roll device of this embodiment and the first embodiment are consistent; In this embodiment, the displacement sensor and the balancing hydraulic cylinder 17 are both electrically connected to the control unit. The displacement sensor is disposed on the balancing hydraulic cylinder 17 or on the fixed crossbeam 2, and is used to monitor the displacement data of the piston rod 18 of the balancing hydraulic cylinder 17 and feed it back to the control unit; the control unit is used to perform real-time analysis on the received displacement data and to adjust the output flow of the balancing hydraulic cylinder 17; The rolling mill vertical roll device also includes an early warning unit (not shown in the figure), which is electrically connected to the control unit and is used to send out an alarm to remind the staff to check or repair; When working, the displacement sensor monitors the displacement data of the piston rod 18 of the balancing hydraulic cylinder 17 in real time, and converts it into an electrical signal and transmits it to the control unit. The electrical signal provided by the displacement sensor can reflect the position change of the piston rod 18 in real time. The control unit immediately adjusts the output flow of the balancing hydraulic cylinder 17 according to this information to control the moving speed and displacement of the piston rod 18. Through precise control, the system of the present application can avoid excessive inflow or outflow of hydraulic oil, thereby preventing violent fluctuations or overloads during the operation of the balancing hydraulic cylinder 17, and ensuring the stability and reliability of the hydraulic system during long-term operation. During this process, when the displacement data received by the control unit fluctuates unreasonably, the control unit feeds back information to the early warning unit. At this time, the early warning unit triggers an alarm based on the received abnormal signal, reminding the workers or maintenance personnel to check the equipment. The present application can avoid chain reactions caused by single-point failures by issuing early warnings at the early stages of abnormal fluctuations, reduce the risk of major equipment failures, improve the safety and stability of the entire equipment, extend the service life of the equipment, and ensure stable operation of the equipment during the production process.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rolling mill vertical roll device, characterized in that: The invention comprises a fixed crossbeam (2), a vertical roller (1) mounted on the fixed crossbeam (2), a lead screw (15), a worm wheel (4), and a balancing hydraulic cylinder (17), wherein the lead screw (15) is inserted into the worm wheel (4) and is threadedly connected to the worm wheel (4), the worm wheel (4) is rotatably arranged, one end of the lead screw (15) that passes through the worm wheel (4) is in contact with and connected to the vertical roller (1), and the balancing hydraulic cylinder (17) is provided with a piston rod (18), wherein the piston rod (18) passes through the lead screw (15) and is connected to the vertical roller (1); the piston rod (18) is driven by the balancing hydraulic cylinder (17) to be tightened, thereby eliminating the gap between the vertical roller (1) and the lead screw (15), and between the lead screw (15) and the worm wheel (4).

2. The rolling mill vertical roller device according to claim 1, characterized in that: A pressure pad (12) is provided between the lead screw (15) and the vertical roller (1), and the lead screw (15) is in tight contact with the pressure pad (12).

3. The rolling mill vertical roller device according to claim 2, characterized in that: The piston rod (18) passes through the lead screw (15) and the pressure pad (12) in sequence and is then inserted into the vertical roller (1). The piston rod (18) is connected to the vertical roller (1) via a balancing cylinder pin shaft (11).

4. The rolling mill vertical roller device according to claim 1, characterized in that: It also includes an outer pressure cover (13), wherein the outer pressure cover (13) fixes the worm wheel (4) inside the fixed crossbeam (2).

5. The rolling mill vertical roller device according to claim 4, characterized in that: It also includes a wear-resistant sleeve (14), which is arranged in the fixed crossbeam (2) and sleeved on the outside of the lead screw (15), and the wear-resistant sleeve (14) abuts between the worm wheel (4) and the outer pressure cover (13).

6. The rolling mill vertical roller device according to claim 5, characterized in that: It also includes a wear-resistant pad (16), which is arranged in the fixed crossbeam (2) and located on a side of the worm wheel (4) away from the outer pressure cover (13), and the wear-resistant pad (16) abuts against the worm wheel (4) and the fixed crossbeam (2).

7. The rolling mill vertical roller device according to claim 1, characterized in that: It also comprises a hydraulic motor (3) and a worm (5), wherein the hydraulic motor (3) is connected to the worm (5) and is used to drive the worm (5) to rotate, and the worm (5) is meshingly connected to the worm wheel (4).

8. The rolling mill vertical roller device according to claim 1, characterized in that: The lead screw (15) is a hollow lead screw.

9. The rolling mill vertical roller device according to claim 1, characterized in that: It also includes a displacement sensor and a control unit, wherein the displacement sensor is used to monitor the displacement data of the piston rod (18) and feed back the displacement data to the control unit, and the control unit is used to perform real-time analysis on the received displacement data and to adjust the output flow of the balancing hydraulic cylinder (17).

10. The rolling mill vertical roller device according to claim 9, characterized in that: It also includes an early warning unit, which is electrically connected to the control unit and is used to send out an alarm to remind staff to check or repair.

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