Hydraulic balancing device for working roll
By designing cylindrical grooves and keyways in the hydraulic balance device of the working roller equipment, combined with the coordination of the keys and limiting plates, the problems of vibration of the working roller bearing box and rotation of the hydraulic cylinder cylinder are solved, and the anti-torsion and oil leakage effects of the hydraulic pipeline are achieved.
Patent Information
- Application Number
- CN202420837767.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-22
AI Technical Summary
In existing rolling mill equipment, the bearing box of the working roller is prone to vibration, causing the hydraulic cylinder cylinder to rotate, which in turn causes the hydraulic pipeline to twist, bend and oil leakage.
A hydraulic balancing device for working rollers is designed. By setting a cylindrical groove and a keyway on the top of the lower bearing box, a balanced hydraulic cylinder is installed, and the coupling of the keys and limiting plates is used to prevent the rotation of the hydraulic cylinder cylinder.
It effectively prevents the rotation of the hydraulic cylinder cylinder, avoids twisting and bending of the hydraulic pipeline and oil leakage, and ensures the maintenance of the working roller gap and the stable operation of the equipment.
Smart Images
Figure CN222607561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rolling mill equipment, in particular to a hydraulic balancing device for a working roll. Background Art
[0002] At present, in the process of plate production, rolling mills are usually used to roll the plates, among which the working roll balancing device is an important part of the rolling mill. When the plate enters the upper working roll and the lower working roll for rolling, the gap between the upper and lower working rolls needs to be maintained. The working roll balancing device usually installs a hydraulic cylinder on the bearing box of the lower working roll, and uses the piston rod of the hydraulic cylinder to apply a balancing force on the bearing box of the upper working roll in the vertical direction, and relies on the weight of the upper support roll device to retract the piston rod of the hydraulic cylinder, thereby maintaining the gap between the upper and lower working rolls.
[0003] In the prior art, when the upper working roll and the lower working roll are rolling plates, the bearing boxes of the upper working roll and the lower working roll will vibrate, and the cylinder barrel of the hydraulic cylinder installed on the bearing box of the lower working roll will rotate, causing the hydraulic pipeline connected to the cylinder barrel of the hydraulic cylinder to twist and bend. In severe cases, the hydraulic pipeline will be damaged, causing oil leakage in the hydraulic pipeline. Summary of the invention
[0004] The utility model aims to solve the problems in the prior art that the bearing boxes of the upper working roll and the lower working roll vibrate and the cylinder barrel of the hydraulic cylinder installed on the bearing box of the lower working roll is easy to rotate, and provides a working roll hydraulic balancing device, which can not only maintain the gap between the upper working roll and the lower working roll, but also effectively prevent the rotation of the cylinder barrel of the hydraulic cylinder, thereby avoiding torsion and bending of the hydraulic pipeline.
[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a working roll hydraulic balancing device, comprising a lower working roll, an upper working roll, a lower bearing box and an upper bearing box, the lower working roll is provided with the lower bearing boxes at both ends, the upper working roll is provided with the upper bearing boxes at both ends, the top of the lower bearing box is provided with cylindrical grooves located on both sides of the lower working roll, the upper part of the cylindrical groove is provided with a step, and the top of the lower bearing box is provided with a key groove connected to the cylindrical groove.
[0006] A balancing hydraulic cylinder is inserted in the cylindrical groove, and the balancing hydraulic cylinder includes a cylinder barrel, a piston rod and a guide sleeve. The piston rod is sleeved inside the cylinder barrel, and the upper end of the piston rod is pressed against the bottom of the upper bearing box. The guide sleeve is fixedly arranged on the inner wall of the cylinder barrel. The piston rod of the balancing hydraulic cylinder cooperates with the upper bearing box to maintain the gap between the upper working roll and the lower working roll. The guide sleeve plays a guiding role with the piston rod, and the balancing hydraulic cylinder is installed on the lower bearing box through the cylindrical groove.
[0007] A fixing block is fixedly provided on the outer side wall of the upper end of the cylinder barrel, and a key groove 2 corresponding to the key groove 1 is opened on the fixing block, and a key is inserted in the key groove 1 and the key groove 2. The key cooperates with the fixing block and the lower bearing box to effectively prevent the cylinder barrel of the balancing hydraulic cylinder from rotating.
[0008] The inner side wall of the upper end of the cylinder is provided with an annular groove 1 and an annular groove 2. A dust ring is arranged in the annular groove 1, and a sealing ring is arranged in the annular groove 2. The dust ring is used to prevent external foreign particles from entering the balancing hydraulic cylinder, and the sealing ring is used to prevent the hydraulic oil inside the balancing hydraulic cylinder from leaking to the outside.
[0009] Furthermore, the fixing block matches the step, the fixing block is located on the step, and the step supports the fixing block.
[0010] Furthermore, a convex block is fixedly provided on the upper end of the piston rod, and a convex groove corresponding to the convex block is opened on the bottom of the upper bearing box. The convex block is located in the convex groove, and through the cooperation between the convex block and the convex groove, the piston rod of the balancing hydraulic cylinder is pressed against the upper bearing box.
[0011] Furthermore, the number of the key groove one and the key groove two are both two, and the key is inserted into the key groove one and the key groove two to prevent the cylinder from rotating. The key serves as a limit for the cylinder and can effectively prevent the cylinder from rotating.
[0012] Furthermore, two limit plates are symmetrically arranged on the upper part of the fixed block, and a limit groove matching the limit plate is opened on the top of the lower bearing box. The cooperation between the limit plate and the limit groove can further prevent the cylinder barrel from rotating.
[0013] Furthermore, the dust ring is sleeved on the piston rod; the number of the annular groove 2 and the sealing ring is two, the sealing ring is sleeved on the piston rod, a guide sleeve 2 is fixedly arranged between the two sealing rings, and a guide sleeve 2 is also fixedly arranged between the dust ring and one of the sealing rings, and the guide sleeve 2 plays a guiding role on the piston rod.
[0014] Furthermore, a hydraulic oil port is provided on the cylinder barrel, through which hydraulic oil can be transported to the inside of the balancing hydraulic cylinder.
[0015] Through the above technical solution, the beneficial effects of the utility model are:
[0016] The utility model has a reasonable structure and good use effect. The piston rod of the balancing hydraulic cylinder exerts a vertical force on the upper bearing box to maintain the gap between the upper working roll and the lower working roll; at the same time, it can effectively prevent the rotation of the cylinder barrel of the balancing hydraulic cylinder, and prevent the cylinder barrel from rotating due to the vibration of the upper bearing box and the lower bearing box, thereby preventing the hydraulic pipeline from twisting and bending, and further preventing the hydraulic pipeline from being damaged and leaking oil.
[0017] The utility model installs the balancing hydraulic cylinder on the lower bearing box through the cylindrical groove, so that the piston rod of the balancing hydraulic cylinder exerts a vertical force on the upper bearing box; wherein the card key is inserted into the card key groove 1 and the card key groove 2, and the card key cooperates with the fixed block and the lower bearing box to achieve the effect of preventing the balancing hydraulic cylinder barrel from rotating, and the limit plate and the limit groove cooperate to further prevent the balancing hydraulic cylinder barrel from rotating.
[0018] The dustproof ring of the utility model prevents external impurity particles from entering into the balancing hydraulic cylinder, and the sealing ring prevents the hydraulic oil inside the balancing hydraulic cylinder from leaking to the outside. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of a hydraulic balancing device for a working roll of the utility model. Figure 1 ;
[0020] Figure 2 This is a schematic diagram of the structure of a hydraulic balancing device for a working roll of the utility model. Figure 2 ;
[0021] Figure 3 It is a structural schematic diagram of the lower bearing box of the utility model;
[0022] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;
[0023] Figure 5 It is a structural schematic diagram of the upper bearing box of the utility model;
[0024] Figure 6 This is a schematic diagram of the installation structure of the utility model balance hydraulic cylinder;
[0025] Figure 7 yes Figure 6 A schematic diagram of the enlarged structure at B in the middle;
[0026] Figure 8 This is a schematic diagram of the structure of the utility model balance hydraulic cylinder Figure 1 (excluding card keys);
[0027] Fig. 9 This is a schematic diagram of the structure of the utility model balance hydraulic cylinder Figure 2 ;
[0028] Fig.10 This is a schematic diagram of the structure of the utility model balance hydraulic cylinder Figure 3 .
[0029] The numbers in the accompanying drawings are: 1 is the lower working roller, 2 is the upper working roller, 3 is the lower bearing box, 4 is the upper bearing box, 5 is the convex groove, 6 is the cylindrical groove, 7 is the step, 8 is the key groove one, 9 is the cylinder, 10 is the piston rod, 11 is the convex block, 12 is the fixed block, 13 is the key groove two, 14 is the limit plate, 15 is the key, 16 is the guide sleeve one, 17 is the annular groove one, 18 is the dust ring, 19 is the annular groove two, 20 is the sealing ring, and 21 is the guide sleeve two. DETAILED DESCRIPTION
[0030] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:
[0031] like Figures 1 to 10 As shown, a hydraulic balancing device for a working roll comprises a lower working roll 1, an upper working roll 2, a lower bearing box 3 and an upper bearing box 4. The lower working roll 1 is provided with the lower bearing box 3 at both ends, and the upper bearing box 4 is provided with the upper bearing box 4 at both ends of the upper working roll 2. The top of the lower bearing box 3 is provided with a cylindrical groove 6 located on both sides of the lower working roll 1, and a step 7 is provided on the upper part of the cylindrical groove 6. The top of the lower bearing box 3 is provided with a key groove 8 communicating with the cylindrical groove 6. In this embodiment, two cylindrical grooves 6 are provided on each lower bearing box 3, and the two cylindrical grooves 6 are respectively located on both sides of the lower working roll 1. The cylindrical groove 6 is used to install the balancing hydraulic cylinder on the lower bearing box 3. The number of the key grooves 8 is two, and the two key grooves 8 are symmetrically provided on the inner side of the cylindrical groove 6.
[0032] A balancing hydraulic cylinder is inserted in the cylindrical groove 6, and the balancing hydraulic cylinder includes a cylinder barrel 9, a piston rod 10 and a guide sleeve 16. The piston rod 10 is sleeved inside the cylinder barrel 9, and the upper end of the piston rod 10 is pressed against the bottom of the upper bearing box 4. The guide sleeve 16 is fixedly arranged on the inner wall of the cylinder barrel 9. In this embodiment, the guide sleeve 16 guides the piston rod 10. The guide sleeve 16 is welded and fixed to the inner wall of the cylinder barrel 9, and has a thickness of 3 mm and is made of copper alloy. The balancing hydraulic cylinder extends out to press the upper bearing box 4 at the end of the upper working roll 2, and the piston rod is retracted by relying on the weight of the upper support roll device, so as to maintain the gap between the lower working roll 1 and the upper working roll 2.
[0033] A fixing block 12 is fixedly provided on the outer side wall of the upper end of the cylinder barrel 9, and a key groove 2 13 corresponding to the key groove 1 8 is opened on the fixing block 12, and a key 15 is inserted in the key groove 1 8 and the key groove 2 13. By inserting the key 15 in the key groove 1 8 and the key groove 2 13, the effect of preventing the cylinder barrel 9 of the balancing hydraulic cylinder from rotating is achieved.
[0034] The inner side wall of the upper end of the cylinder 9 is provided with an annular groove 17 and an annular groove 2 19, a dust ring 18 is arranged in the annular groove 17, and a sealing ring 20 is arranged in the annular groove 2 19. In this embodiment, the distance between the dust ring 15 and the end of the cylinder 9 is smaller than the distance between the sealing ring 20 and the end of the cylinder 9.
[0035] The fixing block 12 matches the step 7 , and the fixing block 12 is located on the step 7 . In this embodiment, when the balancing hydraulic cylinder is installed in the cylindrical groove 6 , the fixing block 12 is located on the step 7 , and the step 7 supports the fixing block 12 .
[0036] A convex block 11 is fixedly provided at the upper end of the piston rod 10 , and a convex groove 5 corresponding to the convex block 11 is opened at the bottom of the upper bearing box 4 , and the convex block 11 is located in the convex groove 5 .
[0037] There are two key grooves 18 and two key grooves 13, and the key 15 is inserted into the key groove 18 and the key groove 13 to prevent the cylinder 9 from rotating. In this embodiment, the two key grooves 8 are symmetrically arranged on the top of the lower bearing box 3, and the two key grooves 13 are symmetrically arranged on the fixed block 12.
[0038] Two limit plates 14 are symmetrically arranged on the upper part of the fixed block 12, and a limit groove matching the limit plate 14 is opened on the top of the lower bearing box 3. In this embodiment, when the balancing hydraulic cylinder is installed in the cylindrical groove 6, the limit plate 14 is located in the limit groove. Through the cooperation between the limit plate 14 and the limit groove, the cylinder barrel 9 can be further prevented from rotating.
[0039] The dust ring 18 is sleeved on the piston rod 10; the number of the annular groove 19 and the sealing ring 20 are both two, the sealing ring 20 is sleeved on the piston rod 10, a guide sleeve 21 is fixedly arranged between the two sealing rings 20, and a guide sleeve 21 is also fixedly arranged between the dust ring 18 and one of the sealing rings 20. In this embodiment, the guide sleeve 21 guides the piston rod 10, and the guide sleeve 21 is welded and fixed to the inner wall of the cylinder 9, and its thickness is 3mm, and it is made of copper alloy.
[0040] The cylinder barrel 9 is also provided with a hydraulic oil port, which in this embodiment is used to connect a hydraulic pipeline, and to transport hydraulic oil to the inside of the balancing hydraulic cylinder through the hydraulic pipeline and the hydraulic oil port, thereby providing power for the movement of the piston rod 10 .
[0041] When the utility model is used, hydraulic oil is transported to the inside of the balancing hydraulic cylinder through the hydraulic oil port, so that the piston rod 10 extends out to press against the upper bearing box 4 at the end of the upper working roll 2, and at the same time, the piston rod 10 is retracted by relying on the weight of the upper supporting roll device to maintain the gap between the upper working roll 2 and the lower working roll 1. During the extension and retraction of the piston rod 10, the guide sleeve 16 and the guide sleeve 21 play the role of guiding the piston rod 10, the dust ring 18 prevents external impurity particles from entering the balancing hydraulic cylinder, and the two sealing rings 20 prevent the hydraulic oil inside the balancing hydraulic cylinder from leaking to the outside; the key 15 is inserted into the key slot 1 8 and the key slot 2 13 to prevent the cylinder barrel 9 of the balancing hydraulic cylinder from rotating, and the limit plate 14 is located in the limit slot to further prevent the cylinder barrel 9 of the balancing hydraulic cylinder from rotating.
[0042] The embodiments described above are only preferred embodiments of the utility model and do not limit the scope of implementation of the utility model. Therefore, all equivalent changes or modifications made according to the technical solutions described in the patent scope of the utility model should be included in the scope of the patent application of the utility model.
Claims
1. A working roll hydraulic balancing device, comprising a lower working roll (1), an upper working roll (2), a lower bearing box (3) and an upper bearing box (4), wherein both ends of the lower working roll (1) are provided with the lower bearing box (3), and both ends of the upper working roll (2) are provided with the upper bearing box (4), characterized in that: The top of the lower bearing box (3) is provided with a cylindrical groove (6) located on both sides of the lower working roll (1), the upper part of the cylindrical groove (6) is provided with a step (7), and the top of the lower bearing box (3) is provided with a key groove (8) communicating with the cylindrical groove (6); A balancing hydraulic cylinder is inserted into the cylindrical groove (6), and the balancing hydraulic cylinder comprises a cylinder barrel (9), a piston rod (10) and a guide sleeve (16). The piston rod (10) is sleeved inside the cylinder barrel (9), and the upper end of the piston rod (10) is pressed against the bottom of the upper bearing box (4). The guide sleeve (16) is fixedly arranged on the inner wall of the cylinder barrel (9); A fixing block (12) is fixedly provided on the outer side wall of the upper end of the cylinder barrel (9), and a second key groove (13) corresponding to the first key groove (8) is formed on the fixing block (12), and a key (15) is inserted into the first key groove (8) and the second key groove (13); An annular groove 1 (17) and an annular groove 2 (19) are provided on the inner side wall of the upper end of the cylinder barrel (9), a dust ring (18) is provided in the annular groove 1 (17), and a sealing ring (20) is provided in the annular groove 2 (19).
2. A working roll hydraulic balancing device according to claim 1, characterized in that: The fixing block (12) matches the step (7), and the fixing block (12) is located on the step (7).
3. A working roll hydraulic balancing device according to claim 1, characterized in that: A convex block (11) is fixedly provided at the upper end of the piston rod (10), a convex groove (5) corresponding to the convex block (11) is provided at the bottom of the upper bearing box (4), and the convex block (11) is located in the convex groove (5).
4. A working roll hydraulic balancing device according to claim 1, characterized in that: The number of the first key groove (8) and the second key groove (13) are both two, and the key (15) is inserted into the first key groove (8) and the second key groove (13) to prevent the cylinder barrel (9) from rotating.
5. The working roll hydraulic balancing device according to claim 1, characterized in that: Two limiting plates (14) are symmetrically arranged on the upper part of the fixing block (12), and a limiting groove matching the limiting plates (14) is opened on the top of the lower bearing box (3).
6. A working roll hydraulic balancing device according to claim 1, characterized in that: The dustproof ring (18) is sleeved on the piston rod (10); the number of the annular groove (19) and the sealing ring (20) is two, the sealing ring (20) is sleeved on the piston rod (10), a guide sleeve (21) is fixedly arranged between the two sealing rings (20), and a guide sleeve (21) is also fixedly arranged between the dustproof ring (18) and one of the sealing rings (20).
7. The working roll hydraulic balancing device according to claim 1, characterized in that: The cylinder barrel (9) is also provided with a hydraulic oil port.