Device for stabilizing control and noise reduction of servo valve

Abstract

The utility model relates to the technical field of hydraulic servo, in particular to a device for stabilizing control and noise reduction of a servo valve, which comprises a fixed support, a control adjusting valve block is mounted at the top of the fixed support, a pressure reducing valve is mounted at the top of the control adjusting valve block, and an inlet pressure flange pipe is mounted on and communicated with the front surface of the control adjusting valve block. Pressure is well controlled during rolling, the accident rate of equipment is reduced, the cost of the equipment is reduced, the production efficiency is improved, potential safety hazards caused by the part to steel rolling equipment are reduced, leakage accidents are avoided, and the hydraulic servo control system is suitable for stable control and use in all metallurgical enterprises. By means of the device, major accidents of steel clamping can be avoided, field problems can be solved quickly, control precision is improved, time for replacing accident spare parts is eliminated, stability of a servo system is improved to the maximum extent, maintenance is more convenient, a large amount of energy and cost are saved, and field use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic servo, in particular to a device for stabilizing servo valve control and reducing noise. Background Art

[0002] In metallurgical enterprises, hydraulic servo systems are gradually used in high-precision control of metallurgical enterprises. For example, in hot rolling enterprises, during the production process, due to the high precision requirements on the width or thickness of the rolled slab and the large rolling side pressure, the control pressure of the servo system also increases, generally reaching more than 20MPa.

[0003] After searching, the patent number is CN116300420B, and the name is a utility model of a servo control method, system, device, terminal equipment and storage medium. The method obtains an error signal; inputs the error signal into a preset finite-time disturbance observer to obtain disturbance feedback; generates a target voltage signal based on the error signal and the disturbance feedback based on a preset model predictive controller, and sends the target voltage signal to the servo valve, so that the servo valve adjusts the valve opening according to the target voltage signal. By combining the model predictive control and the finite-time disturbance observer, the controller of the servo control system can still ensure strong robustness and stability in the presence of input constraints and external disturbances. The finite-time disturbance observer can perform online detection and real-time estimation of unknown disturbances, and can quickly approach the mixed disturbances existing in the system and the outside world, thereby improving the nonlinear control effect of the electro-hydraulic servo system.

[0004] After searching, the patent number is CN116968373A, and the name is a utility model of a hydraulic system control device and a control method based on electric servo control technology, which relates to the field of electric servo control technology, and specifically, to a hydraulic system control device and a control method based on electric servo control technology. The utility model can accurately control the movement of the hydraulic system by electrically driving the squeezing roller to move, improve the positioning accuracy and motion stability of the object squeezing, reduce energy consumption, and improve the energy utilization efficiency of the hydraulic system. The hydraulic working component is controlled to move by the sensing module, and can respond to external instructions and changing working conditions more quickly, thereby improving the response speed and motion flexibility of the hydraulic system. Therefore, there is no need to use traditional hydraulic valves and regulating valves, and the number of electromechanical components and energy loss are greatly reduced. Accordingly, the device cost and maintenance cost are reduced, and the working efficiency of the system is improved. The anti-deviation fixing component is controlled to move by the positioning module, thereby limiting the object to prevent the object from being offset when being squeezed.

[0005] After searching, the patent number is CN208853504U, and the name is a utility model of a servo-type locking mechanism, a buffer device and a punching machine, which includes: a hydraulic cylinder, a valve stem, an oil supply assembly and a servo valve, wherein the valve stem is movably arranged in the hydraulic cylinder; the oil supply assembly includes an oil barrel storing the second hydraulic oil, a servo pump arranged in the oil barrel and connected to the second oil pipeline, and a servo motor connected to the servo pump; the servo valve has a through port, an oil inlet, and an oil outlet, the through port is connected to the hydraulic cylinder through the first oil pipeline, and the oil inlet is connected to the oil supply assembly through the second oil pipeline. The utility model also provides a buffer device and a punching machine with the servo-type locking mechanism. By means of the design of the servo valve and the oil supply assembly of the servo-type locking mechanism, the rising speed of the die pad slider can be controlled to reduce the force and noise generated when it collides with the machine.

[0006] Through research and analysis, it is found that the above-mentioned public patent still has the following shortcomings to a certain extent.

[0007] For example, during the adjustment process of the servo valve, abnormal pressure fluctuations will always occur, resulting in quick opening accidents and abnormal high-frequency howling from the servo valve body. It was found that the above phenomenon was caused by frequent adjustments of the pilot valve of the servo valve. Under this phenomenon, cracks quickly appeared on the end cover of the servo valve body, causing oil injection accidents and major accidents such as "steel jamming". In order to solve the above technical problems, we designed a device to stabilize the servo valve control and reduce noise. Utility Model Content

[0008] The purpose of the utility model is to provide a device for stabilizing servo valve control and reducing noise, which has the advantages of achieving good pressure control during rolling, reducing equipment accident rate, reducing equipment cost, improving production efficiency, reducing the safety hazard caused by this part to steel rolling equipment, avoiding the occurrence of leakage accidents, and being suitable for the stable control of hydraulic servo control systems in all metallurgical enterprises. It solves the problems of abnormal pressure fluctuations, fast opening accidents, and abnormal high-frequency howling of the servo valve body during the adjustment process of the servo valve. It is found that the above phenomenon is caused by frequent adjustment of the pilot valve of the servo valve, and under this phenomenon, cracks quickly appear on the end cover of the servo valve body, causing oil injection accidents, and at the same time causing major accidents such as "steel jamming".

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for stabilizing servo valve control and reducing noise, comprising a fixed bracket, a control adjustment valve block is installed on the top of the fixed bracket, a pressure reducing valve is installed on the top of the control adjustment valve block, an inlet pressure flange pipe is installed and connected to the front of the control adjustment valve block, an outlet pressure-stabilizing flange pipe is installed and connected to the back of the control adjustment valve block, a unloading pipeline is installed and connected to the left side of the control adjustment valve block, an inlet pressure measuring point is installed and connected to the front side of the right side of the control adjustment valve block, and an outlet pressure measuring point is installed and connected to the rear side of the right side of the control adjustment valve block.

[0010] Preferably, the outer surface of the control and adjustment valve block is treated with anti-corrosion due to the complex on-site operating environment.

[0011] Preferably, the control and adjustment valve block is installed independently and is arranged between the pilot valve of the servo valve and the filter.

[0012] Preferably, the control and adjustment valve block is designed on the connection system pipeline of the inlet pressure flange pipe and the outlet pressure-stabilizing flange pipe, and the unloading pipeline is connected to the oil return pipeline.

[0013] Preferably, a pressure measuring point is installed on the channel connecting the side surface of the control and adjustment valve block and the inlet pressure flange pipe, and a pressure measuring point is installed on the channel connecting the side surface of the control and adjustment valve block and the outlet pressure-stabilizing flange pipe.

[0014] Preferably, the unloading pipeline is connected to the oil return pipeline by a high-pressure hose, and the shape of the fixing bracket is an inverted U shape.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model realizes good control of pressure during rolling, reduces equipment accident rate, reduces equipment cost, improves production efficiency, reduces potential safety hazards caused by this part to steel rolling equipment, avoids leakage accidents, and is suitable for stable control use of hydraulic servo control systems in all metallurgical enterprises; the device can avoid major accidents such as "steel jamming", quickly solve on-site problems, improve control accuracy, and eliminate the time for replacing accident spare parts, thereby greatly improving the stability of the servo system, making maintenance more convenient, saving a lot of energy and cost, and meeting on-site use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the right side structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the front view structure of the utility model;

[0020] Figure 4 This is a rear view structural diagram of the utility model;

[0021] Figure 5 It is a schematic diagram of the principle of the utility model.

[0022] In the figure: 1. Inlet pressure flange pipe; 2. Outlet pressure-stabilizing flange pipe; 3. Unloading pipeline; 4. Inlet pressure measuring point; 5. Outlet pressure measuring point; 6. Pressure reducing valve; 7. Fixed bracket; 8. Control and adjustment valve block. DETAILED DESCRIPTION

[0023] See also Figure 1-Figure 4 A device for stabilizing servo valve control and reducing noise comprises a fixed bracket 7, a control adjustment valve block 8 is installed on the top of the fixed bracket 7, a pressure reducing valve 6 is installed on the top of the control adjustment valve block 8, a low-pressure control function is achieved through the pressure reducing valve 6, and frequent adjustment of the pilot valve of the servo valve is avoided, an inlet pressure flange pipe 1 is installed and connected on the front of the control adjustment valve block 8, an outlet pressure stabilizing flange pipe 2 is installed and connected on the back of the control adjustment valve block 8, a unloading pipeline 3 is installed and connected on the left side of the control adjustment valve block 8, an inlet pressure measuring point 4 is installed and connected on the front side of the right side of the control adjustment valve block 8, and an outlet pressure measuring point 5 is installed and connected on the rear side of the right side of the control adjustment valve block 8.

[0024] See also Figure 1 , control and adjust the valve block 8. Due to the complex on-site operating environment, the outer surface of the valve block is treated with anti-corrosion to increase corrosion resistance.

[0025] See also Figure 1 The control adjustment valve block 8 is installed independently and is arranged between the pilot valve and the filter of the servo valve.

[0026] See also Figure 1 and Figure 3 The control and adjustment valve block 8 is designed on the connecting system pipeline between the inlet pressure flange pipe 1 and the outlet pressure stabilizing flange pipe 2, and the unloading pipeline 3 is connected to the return oil pipeline.

[0027] See also Figure 1 and Figure 2 A pressure measuring point is installed on the connecting channel between the side of the control and adjustment valve block 8 and the inlet pressure flange pipe 1, so that the system oil supply pressure can be observed. A pressure measuring point is installed on the connecting channel between the side of the control and adjustment valve block 8 and the outlet pressure-stabilizing flange pipe 2, so that the pressure value of the system after pressure regulation can be observed when the pressure reducing valve 6 is adjusted.

[0028] See also Figure 1 and Figure 4 The unloading pipeline 3 is connected to the oil return pipeline by a high-pressure hose to reduce hydraulic shock and facilitate installation. The shape of the fixed bracket 7 is an inverted U shape.

[0029] When in use, the maximum flow rate, maximum operating pressure, and control range are redesigned according to the actual situation on site. The maximum flow rate, maximum operating pressure, maximum pilot pressure, minimum pilot pressure, and balance pressure are designed after comprehensive analysis. It consists of an inlet pressure flange pipe 1, an outlet pressure-stabilizing flange pipe 2, a unloading pipeline 3, an inlet pressure measuring point 4, an outlet pressure measuring point 5, a pressure reducing valve 6, a fixed bracket 7, and a control adjustment valve block 8. The cleaned and filtered system pressure oil passes through the inlet pressure flange pipe 1 and enters the internal channel of the control adjustment valve block 8. The channel is connected to the pressure reducing valve 6 on the upper part of the valve block. By setting the control adjustment , reaching the system oil supply pressure value, the control adjustment valve block 8 channel is connected to the outlet pressure-stabilizing flange pipe 2 to supply oil to the pilot valve of the servo valve; the control unloading of the pressure reducing valve 6 is connected to the unloading pipeline 3 through the control adjustment valve block 8 channel, and the unloading pipeline 3 is connected to the system unloading pipeline for controlled unloading; the inlet pressure measuring point 4 is installed on the connecting channel between the side of the control adjustment valve block 8 and the inlet pressure flange pipe 1, and the system oil supply pressure can be observed through a pressure gauge; the outlet pressure measuring point 5 is installed on the connecting channel between the side of the control adjustment valve block 8 and the outlet pressure-stabilizing flange pipe 2. When adjusting the pressure reducing valve 6, the pressure value of the system after pressure adjustment can be observed through a pressure gauge, such as Figure 5 As shown in the figure, since the control pressure of the pilot valve of the servo valve is 8-18MPa, the main valve core movement can be fully controlled, and high-pressure control is not required. However, the servo systems controlled on site are often controlled by system pressure. In order to meet the needs of the site, the system pressure will be greater than 20MPa, and some will exceed 30MPa. This will cause the pilot valve of the servo valve to be frequently adjusted during the control process, resulting in large fluctuations in the system pressure, and howling, causing rolling accidents. This device can avoid major accidents such as "steel jamming", quickly solve on-site problems, improve control accuracy, and eliminate the time for replacing accident spare parts, thereby greatly improving the stability of the servo system, making maintenance more convenient, saving a lot of energy and cost, and meeting on-site use requirements.

[0030] To sum up: the device for stabilizing the servo valve control and reducing noise, through the cooperation of the inlet pressure flange pipe 1, the outlet pressure-stabilizing flange pipe 2, the unloading pipeline 3, the inlet pressure measuring point 4, the outlet pressure measuring point 5, the pressure reducing valve 6 and the control adjustment valve block 8, solves the problem that during the adjustment process of the servo valve, there will always be abnormal pressure fluctuations, resulting in fast opening accidents, and abnormal high-frequency howling of the servo valve body. It is found that the above phenomenon is caused by frequent adjustment of the pilot valve of the servo valve, and under this phenomenon, the end cover of the servo valve body quickly cracks, causing oil injection accidents, and at the same time causing major accidents such as "steel jamming".

Claims

1. A device for stabilizing servo valve control and reducing noise, comprising a fixing bracket (7), characterized in that: A control and adjustment valve block (8) is installed on the top of the fixed bracket (7), a pressure reducing valve (6) is installed on the top of the control and adjustment valve block (8), an inlet pressure flange pipe (1) is installed and connected to the front of the control and adjustment valve block (8), an outlet pressure stabilizing flange pipe (2) is installed and connected to the back of the control and adjustment valve block (8), a unloading pipeline (3) is installed and connected to the left of the control and adjustment valve block (8), an inlet pressure measuring point (4) is installed and connected to the front side of the right side of the control and adjustment valve block (8), and an outlet pressure measuring point (5) is installed and connected to the rear side of the right side of the control and adjustment valve block (8).

2. The device for stabilizing servo valve control and reducing noise according to claim 1, characterized in that: The control and adjustment valve block (8) is subjected to anti-corrosion treatment on its outer surface due to the complex on-site operation environment.

3. The device for stabilizing servo valve control and reducing noise according to claim 1, characterized in that: The control adjustment valve block (8) is independently installed and arranged between the pilot valve and the filter of the servo valve.

4. The device for stabilizing servo valve control and reducing noise according to claim 1, characterized in that: The control and adjustment valve block (8) is designed on the connection system pipeline of the inlet pressure flange pipe (1) and the outlet pressure stabilizing flange pipe (2), and the unloading pipeline (3) is connected to the oil return pipeline.

5. The device for stabilizing servo valve control and reducing noise according to claim 1, characterized in that: A pressure measuring point is installed on the channel connecting the side of the control and adjustment valve block (8) and the inlet pressure flange pipe (1), and a pressure measuring point is installed on the channel connecting the side of the control and adjustment valve block (8) and the outlet pressure-stabilizing flange pipe (2).

6. The device for stabilizing servo valve control and reducing noise according to claim 1, characterized in that: The unloading pipeline (3) is connected to the oil return pipeline by a high-pressure hose, and the shape of the fixing bracket (7) is an inverted U shape.

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