Hydraulic Valve Group Design for Micro-Contact Control of the Roller Cleaner in a Leveler

Abstract

The present invention provides a hydraulic valve group design for micro-contact control of a roll cleaner in a planishing machine, including a hydraulic oil circuit, a hydraulic cylinder, a servo valve, a back-pressure valve, and a pressure sensor. Among them, the hydraulic cylinder is provided with a rod chamber and a rodless chamber, and the back-pressure valve is set to a constant pressure value. During operation, the servo valve is energized to increase the hydraulic output to the rodless chamber, so that the pressure value in the rodless chamber is greater than the pressure set by the back-pressure valve, thereby pushing the hydraulic rod to extend; when stopping, the servo valve is de-energized, and the hydraulic pressure is output to the rod chamber, thereby pushing the hydraulic rod to contract. The present invention compensates the wiping force through the back-pressure valve, so that the adjustment pressure must overcome the back-pressure to be adjusted, and the adjustment pressure is increased to be set by using a common hydraulic valve. Therefore, the present invention reduces the technical requirements for hydraulic valve parts, enables all hydraulic valve parts to adopt standard products, and reduces the manufacturing cost.

Description

Technical Field

[0001] The invention belongs to the field of steel strip processing production line equipment, and in particular relates to a hydraulic valve group design for micro-contact control of a roller cleaner of a leveling machine. Background Art

[0002] Two-roller leveling machines are often used in stainless steel production for post-processing such as finishing. After the steel strip is rolled through the leveling machine, some rolling lubricant and other pollutants will remain on the surface. The process requires that the upper and lower surfaces of the finished steel strip be clean and free of oil stains, and that lining paper can be used. Therefore, after the steel strip is leveled by the leveling machine, a roller cleaner device is required to clean the surface of the steel strip. The roller cleaner is controlled by a swing arm device. When it is not in operation, the swing arm device retracts. When it is in operation, the swing arm device extends, so that the roller cleaner equipment contacts the object to be cleaned and keeps it close. However, the clamping force should not be too large, and only slight compression is required. The optimal requirement is 0.1KN±2%. Maintaining a certain clamping force can not only effectively wipe the steel strip, but also not cause deformation or deviation of the steel strip. When the tension of the steel strip is insufficient, the roller cleaner will actively increase the clamping force to avoid insufficient cleaning force due to insufficient wiping force; when the steel strip is tensioned, the clamping force can be passively reduced to avoid damage to the surface quality of the steel strip due to excessive wiping force; at the same time, when the material parameters of the flat mill change, the wiping force can be adjusted accordingly, that is, the swing arm device of the roller cleaner must meet the requirements of rapid response and make corresponding micro-stroke swings to move the position of the roller cleaner but must maintain a constant clamping force.

[0003] The existing roller cleaner swing arm device is driven by a hydraulic cylinder or a pneumatic cylinder. Due to the need for structural rigidity, the cylinder diameter of the hydraulic cylinder must be ≥50mm. If the output force F=0.1KN±2% is to be controlled, the oil circuit working pressure must be adjusted very low. Due to the performance limitations of the hydraulic components, pressure fluctuations and difficulty in setting are likely to occur, resulting in failure to provide a constant wiping force, damage to the steel belt, or unclean wiping. If the oil cylinder of the oil removal roller is reduced in size, the structural strength and rigidity will be affected, and the control accuracy of the pneumatic device is difficult to guarantee, and the cost of using high-end or customized hydraulic valves is too high. Summary of the invention

[0004] In view of the above reasons, it is necessary for the present invention to provide a hydraulic valve group design for micro-contact control of a leveling machine roller cleaner, so as to reduce the technical requirements for hydraulic valve components and reduce manufacturing costs.

[0005] The technical solution provided by the present invention is as follows: a hydraulic valve group design for micro-contact control of a roller cleaner of a leveling machine, comprising:

[0006] A hydraulic oil circuit, the hydraulic oil circuit comprising an oil supply pipeline and an oil return pipeline;

[0007] A hydraulic cylinder, wherein the hydraulic cylinder is provided with a rod chamber and a rodless chamber, wherein the rod chamber is connected to a first extended pipeline, and the rodless chamber is connected to a second extended pipeline;

[0008] a servo valve, the servo valve being communicated with the ends of the first pipeline and the second pipeline respectively, and the servo valve being communicated with the oil supply pipeline and the oil return pipeline;

[0009] a back-pressure valve, the back-pressure valve being connected to the middle of the second pipeline through a third pipeline, and the back-pressure valve being connected to the oil supply pipeline and the oil return pipeline;

[0010] A pressure sensor, the pressure sensor is used to measure the liquid pressure of the rod chamber and the rodless chamber;

[0011] The back pressure valve is set to a constant pressure value. When working, the servo valve is energized to increase the hydraulic output to the rodless chamber, so that the pressure value in the rodless chamber is greater than the pressure set by the back pressure valve, thereby pushing the hydraulic rod to extend; when shut down, the servo valve is not energized, the rodless chamber is connected to the return oil pipeline, and the hydraulic pressure is output to the rod chamber, thereby pushing the hydraulic rod to retract.

[0012] Furthermore, the back pressure valve is configured as a plug-in pressure reducing and relief valve.

[0013] Furthermore, the servo valve is configured as an electro-hydraulic servo valve.

[0014] Furthermore, it also includes a cartridge electromagnetic ball valve, and a cartridge electromagnetic ball valve is respectively provided in the middle of the third pipeline and in the middle of the second pipeline from the connection with the third pipeline to the servo valve.

[0015] Furthermore, it also includes an SAE flange high-pressure ball valve, and one SAE flange high-pressure ball valve is respectively provided on the section of the first pipeline close to the hydraulic cylinder and in the middle of the section of the second pipeline from the connection with the third pipeline to the hydraulic cylinder.

[0016] Furthermore, the hydraulic cylinders are provided with two groups, and the two groups of hydraulic cylinders adopt the same structure and are connected in parallel with the hydraulic oil circuit.

[0017] Furthermore, the front section of the oil supply pipeline is provided with a high-pressure filter, a plate-type pressure reducing valve, a cartridge-type one-way valve and a supercharger in sequence from front to rear, and also includes an accumulator, which is connected to the oil supply pipeline at the rear end of the supercharger through an output pipeline, and a plate-type high-pressure ball valve is provided on the output pipeline connecting the accumulator and the oil supply pipeline.

[0018] Furthermore, the high-pressure filter includes two filters which are connected in series on the oil supply pipeline.

[0019] Furthermore, an SAE flange high-pressure ball valve is respectively provided at the oil inlet end of the oil supply pipeline and the oil outlet end of the oil return pipeline.

[0020] The beneficial effects of the present invention are:

[0021] Compared with the prior art, the present invention compensates the wiping force through the back pressure valve, so that the regulating pressure must overcome the back pressure to be adjusted, and the regulating pressure is increased to a level that can be set by using an ordinary hydraulic valve. Therefore, the present invention reduces the technical requirements for hydraulic valve components, so that all hydraulic valve components use standard products, reducing manufacturing costs.

[0022] The preferred embodiments of the present invention and their beneficial effects will be further described in detail in conjunction with specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a hydraulic valve group design for micro-contact control of a roller cleaner of a leveling machine described in the present invention.

[0024] Numbers and component names in the figure:

[0025] 10. Oil supply pipeline; 20. Oil return pipeline; 30. Hydraulic cylinder; 11. High-pressure filter; 12. Plate-type pressure reducing valve; 13. Cartridge-type non-return valve; 14. Booster; 15. Accumulator; 16. Plate-type high-pressure ball valve; 17. Back-pressure valve; 18. Cartridge-type solenoid ball valve; 19. Servo valve; 21. SAE flange high-pressure ball valve; 22. Pressure sensor; 23. First pipeline; 24. Second pipeline; 25. Third pipeline; 31. Rodless chamber; 32. Rod chamber. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0027] See also Figure 1As shown, this embodiment provides a hydraulic valve group design for micro-contact control of a roller cleaner of a leveling machine, including: a hydraulic oil circuit, the hydraulic oil circuit including an oil supply pipeline 10 and an oil return pipeline 20; a hydraulic cylinder 30, the hydraulic cylinder 30 is provided with a rod chamber 32 and a rodless chamber 31, the rod chamber 32 is connected to a first pipeline 23 extending therefrom, and the rodless chamber 31 is connected to a second pipeline 24 extending therefrom; a servo valve 19, the servo valve 19 is respectively connected to the ends of the first pipeline 23 and the second pipeline 24, and the servo valve 19 is connected to the oil supply pipeline 10 and the oil return pipeline 20; a back pressure valve 17, the back pressure valve 17 is connected to the third pipeline 2 5 is connected to the middle of the second pipeline 24, and the back pressure valve 17 is connected to the oil supply pipeline 10 and the oil return pipeline 20; the pressure sensor 22 is used to measure the hydraulic pressure of the rod chamber 32 and the rodless chamber 31; the back pressure valve 17 is set to a constant pressure value. When working, the servo valve 19 is energized to increase the hydraulic output to the rodless chamber 31, so that the pressure value in the rodless chamber 31 is greater than the pressure set by the back pressure valve 17, thereby pushing the hydraulic rod to extend; when stopping, the servo valve 19 is not energized, the rodless chamber 31 is connected to the oil return pipeline 20, and the hydraulic pressure is output to the rod chamber 32, thereby pushing the hydraulic rod to retract. The servo valve 19 is set as an electro-hydraulic servo valve.

[0028] The back pressure valve 17 is configured as a plug-in pressure reducing and releasing valve. In this embodiment, the constant pressure value set by the plug-in pressure reducing and releasing valve is 30 bar. The present invention increases the back pressure to increase the positive pressure by 30 bar, thereby reducing the technical requirements for the hydraulic valve components.

[0029] It also includes a cartridge electromagnetic ball valve 18 , and one cartridge electromagnetic ball valve 18 is respectively provided in the middle of the third pipeline 25 and in the middle of the section of the second pipeline 24 from the connection with the third pipeline 25 to the servo valve 19 .

[0030] It also includes an SAE flange high-pressure ball valve 21, and one SAE flange high-pressure ball valve 21 is provided on the section of the first pipeline 23 close to the hydraulic cylinder 30 and on the middle of the section of the second pipeline 24 from the connection with the third pipeline 25 to the hydraulic cylinder 30. Furthermore, the hydraulic cylinder 30 is provided with two groups, and the two groups of hydraulic cylinders 30 adopt the same structure and are connected in parallel with the hydraulic oil circuit.

[0031] The front section of the oil supply pipeline 10 is provided with a high-pressure filter 11, a plate-type pressure reducing valve 12, a plug-in check valve 13 and a supercharger 14 in sequence from front to back, and also includes an accumulator 15, which is connected to the oil supply pipeline 10 at the rear end of the supercharger 14 through an output pipeline, and a plate-type high-pressure ball valve 16 is provided on the output pipeline connecting the accumulator 15 and the oil supply pipeline 10. Further, the high-pressure filter 11 includes two arranged in series on the oil supply pipeline 10.

[0032] An SAE flange high-pressure ball valve 21 is respectively disposed at the oil inlet end of the oil supply pipeline 10 and the oil outlet end of the oil return pipeline 20 .

[0033] In summary, the present invention compensates the wiping force through the back pressure valve 17, so that the adjustment pressure must overcome the back pressure to be adjusted, and the adjustment pressure is increased to a level that can be set by using an ordinary hydraulic valve. Therefore, the present invention reduces the technical requirements for hydraulic valve components, so that all hydraulic valve components use standard products, thereby reducing manufacturing costs.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Design of a hydraulic valve group for micro - contact control of a roll cleaner in a leveller, Characterized in that, Comprising: A hydraulic oil circuit, the hydraulic oil circuit including an oil supply pipeline and an oil return pipeline; A hydraulic cylinder, the hydraulic cylinder having a rod chamber and a rodless chamber, the rod chamber communicating with a first pipeline extending outwards, and the rodless chamber communicating with a second pipeline extending outwards; A servo valve, the servo valve being respectively connected to the ends of the first pipeline and the second pipeline, and the servo valve being connected to the oil supply pipeline and the oil return pipeline; A back - pressure valve, the back - pressure valve being connected to the middle of the second pipeline through a third pipeline, and the back - pressure valve being connected to the oil supply pipeline and the oil return pipeline; A pressure sensor, the pressure sensor being used to measure the hydraulic pressure in the rod chamber and the rodless chamber; The back - pressure valve is set to a constant pressure value. During operation, the servo valve is energized to increase the hydraulic output to the rodless chamber, so that the pressure value in the rodless chamber is greater than the pressure set by the back - pressure valve, thereby pushing the hydraulic rod to extend; when stopping, the servo valve is not energized, the rodless chamber is connected to the oil return pipeline, and the hydraulic oil outputs to the rod chamber, thereby pushing the hydraulic rod to contract; It further includes SAE flange high - pressure ball valves, and one SAE flange high - pressure ball valve is respectively provided on the section of the first pipeline close to the hydraulic cylinder and the middle of the section of the second pipeline from the connection with the third pipeline to the hydraulic cylinder; At the front section of the oil supply pipeline, a high - pressure filter, a plate - type pressure reducing valve, a cartridge - type one - way valve and a booster are successively arranged from front to back. It further includes an accumulator, the accumulator is connected to the oil supply pipeline at the rear end of the booster through an output pipeline, and a plate - type high - pressure ball valve is provided on the output pipeline connecting the accumulator and the oil supply pipeline.

2. The design of a hydraulic valve group for micro - contact control of a roll cleaner in a leveller according to claim 1, Characterized in that, The back - pressure valve is a plug - type pressure reducing and pressure - relieving valve.

3. The design of a hydraulic valve group for micro - contact control of a roll cleaner in a leveller according to claim 1, Characterized in that, The servo valve is an electro - hydraulic servo valve.

4. The design of a hydraulic valve group for micro - contact control of a roll cleaner in a leveller according to claim 1, Characterized in that, It further includes cartridge - type electromagnetic ball valves, and one cartridge - type electromagnetic ball valve is respectively provided in the middle of the third pipeline and the middle of the section of the second pipeline from the connection with the third pipeline to the servo valve.

5. The design of a hydraulic valve group for micro - contact control of a roll cleaner in a leveller according to claim 1, Characterized in that, There are two groups of hydraulic cylinders, and the two groups of hydraulic cylinders adopt the same structure and are connected in parallel with the hydraulic oil circuit.

6. The design of a hydraulic valve group for micro - contact control of a roll cleaner in a leveller according to claim 1, Characterized in that, The high - pressure filter includes two connected in series and arranged on the oil supply pipeline.

7. The design of a hydraulic valve group for micro - contact control of a roll cleaner in a leveller according to claim 1, Characterized in that, One SAE flange high - pressure ball valve is respectively provided at the oil inlet end of the oil supply pipeline and the oil outlet end of the oil return pipeline.

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