A proportional valve controlled pressure relief system for a magnetic material press

Abstract

The utility model discloses a proportional valve controlled pressure relief system for a magnetic material press, comprising: an oil tank; a main cylinder; a first cartridge valve; a main pump, located between the oil tank and the first cartridge valve, for pumping oil from the oil tank to the first cartridge valve; a driving motor, connected to the main pump drive; a second cartridge valve, arranged between the first cartridge valve and the main cylinder, the second cartridge valve being connected to a solenoid valve; a detection device, arranged between the second cartridge valve and the main cylinder; and a proportional valve, arranged between the oil tank and the detection device. The utility model adopts electrical signal control of the proportional valve to realize automatic control of the hydraulic system, solving the problem that manual control cannot meet the automation requirements. The continuous proportional adjustment function of the proportional valve may help to achieve fast and accurate pressure relief, meeting the working condition requirements for adjustable pressure relief time.

Description

Technical Field

[0001] The utility model relates to the technical field related to hydraulic press control, in particular to a proportional valve controlled pressure relief system for a magnetic material press. Background Art

[0002] In the field of industrial automation and mechanical manufacturing, accurate pressurization and depressurization of workpieces is a common process requirement. Traditional pressurization usually relies on a servo motor to drive the main pump, which draws oil from the oil tank and delivers high-pressure oil to the main cylinder to achieve pressurization. In this process, the pressure gauge and pressure sensor are used to monitor the pressure in the main cylinder in real time, and adjust the output flow of the main pump by controlling the speed of the servo motor, thereby controlling the pressurization speed of the main cylinder.

[0003] Traditional pressure relief systems usually use manual adjustment of cartridge valves to control the pressure relief speed and time. This method is not only cumbersome to operate, but also has low adjustment accuracy and is difficult to meet the requirements of high-precision processes. In addition, manual adjustment may also cause the pressure relief time to be too long or too short, affecting product quality and production efficiency. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the utility model provides a proportional valve controlled pressure relief system for a magnetic material press, which can solve the problems of low precision and inconvenient adjustment in the pressure relief process.

[0005] The utility model adopts the following technical solution to solve the problem: a proportional valve controlled pressure relief system of a magnetic material press, comprising: an oil tank; a master cylinder; a first cartridge valve; a main pump, the main pump is located between the oil tank and the first cartridge valve, and is used to pump oil from the oil tank to the first cartridge valve; a drive motor, the drive motor is drive-connected to the main pump; a second cartridge valve, the second cartridge valve is arranged between the first cartridge valve and the master cylinder, and the second cartridge valve is connected to a solenoid valve; a detection device, the detection device is arranged between the second cartridge valve and the master cylinder; a proportional valve, the proportional valve is arranged between the oil tank and the detection device.

[0006] By adopting the above solution, the electrical signal control of the proportional valve is used to realize the automatic control of the hydraulic system, which solves the problem that manual control cannot meet the automation requirements. The continuous proportional adjustment function of the proportional valve may help to achieve fast and accurate pressure relief and meet the working conditions requirements for adjustable pressure relief time.

[0007] Furthermore, the oil tank includes a first oil tank and a second oil tank, an oil supply pipeline is provided between the first oil tank and the master cylinder, and an oil discharge pipeline is provided between the second oil tank and the master cylinder.

[0008] By adopting the above scheme, the first oil tank is used as the main oil source, and the oil required for pressurization is provided to the master cylinder through the oil delivery pipeline. This ensures that the master cylinder can obtain a stable and sufficient supply of oil during the pressurization process; the second oil tank is used to receive the oil discharged when the master cylinder is depressurized. Through the oil discharge pipeline, the oil in the master cylinder can be quickly and effectively guided to the second oil tank, thereby realizing a rapid depressurization process; the proportional valve can accurately control the pressure of the oil based on the input electrical signal. During the depressurization process, the proportional valve can accurately adjust the discharge speed of the oil according to the preset depressurization curve or speed, thereby realizing precise depressurization control.

[0009] Furthermore, the oil supply pipeline and the oil discharge pipeline converge into a main oil circuit, the main oil circuit is connected to the master cylinder, and the detection device is arranged on the main oil circuit.

[0010] By adopting the above solution, the system realizes unified management and control of oil by converging the oil delivery pipeline and the oil discharge pipeline into the main oil circuit. This simplifies the system structure and improves the efficiency and stability of oil flow. At the same time, the detection device is set on the main oil circuit, which can monitor the oil flow of the entire system in real time, including the oil delivery and oil discharge process. This ensures that the system can accurately and timely obtain information on oil pressure, providing strong support for the precise control of the proportional valve; based on the real-time data provided by the detection device, the proportional valve can accurately adjust the oil pressure according to the preset pressure relief curve or speed.

[0011] Furthermore, the detection device includes a pressure gauge, a pressure sensor and a pressure switch.

[0012] By adopting the above scheme, the pressure gauge is used to intuitively display the pressure value in the system, and the pressure sensor is used to convert the pressure signal of the system into an electrical signal for use by control components such as proportional valves and drive motors. Through the coordinated work of the pressure gauge, pressure sensor and pressure switch, the system can monitor and control the pressure state in real time to ensure the stable operation of the system and product quality. At the same time, these detection devices also improve the automation level of the system and reduce the difficulty of operation and error rate.

[0013] Furthermore, the proportional valve is connected to the main oil circuit and the oil drain pipeline respectively.

[0014] By adopting the above scheme, the proportional valve can achieve precise control of the pressure when the hydraulic system is unloading. During the pressurization process, the main pump stably and continuously adjusts the oil flow and pressure of the oil delivery pipeline; during the unloading process, the proportional valve achieves fast and stable pressure unloading by precisely controlling the oil discharge speed of the oil discharge pipeline. This connection method ensures the efficient and stable operation of the system and meets the needs of the magnetic material automatic hydraulic press for high-precision pressure unloading control.

[0015] Furthermore, the proportional valve is also connected to a filter, and the filter is used to filter the pilot control oil of the proportional valve.

[0016] By adopting the above scheme, in the pilot control oil circuit of the proportional valve, the function of the filter is to ensure the cleanliness of the pilot control oil, and can effectively filter particles or impurities in the fluid to prevent impurities or contaminants from entering the pilot control part of the proportional valve and affecting the normal operation and performance of the proportional valve.

[0017] Furthermore, signal transmitters are connected to both sides of the filter.

[0018] By adopting the above scheme, the filter status is monitored by detecting the pressure difference on both sides of the filter and sending a signal. When the impurities or pollutants accumulated inside the filter reach a certain level, causing the pressure difference at both ends of the filter to exceed the alarm value, the transmitter will send a signal to remind the operator to replace the filter element.

[0019] Furthermore, the driving motor is a servo motor.

[0020] By adopting the above solution, electrical energy can be converted into torque and rotation speed to drive and control the main pump.

[0021] Furthermore, the first cartridge valve is a one-way valve.

[0022] By adopting the above solution, the oil can be prevented from flowing back toward the main pump, thereby protecting the main pump.

[0023] In summary, the proportional valve controlled pressure relief system for a magnetic material press provided by the utility model has the following technical effects:

[0024] 1. The hydraulic system is automatically controlled by using the electrical signal control of the proportional valve. This solves the problem that traditional manual control cannot meet the needs of automation, making the pressure relief process more intelligent and convenient;

[0025] 2. The continuous proportional adjustment function of the proportional valve helps to achieve fast and accurate pressure relief. Compared with the traditional manual adjustment of the cartridge valve, the proportional valve is more precise and can accurately control the speed and time of pressure relief, meeting the requirements of working conditions where the pressure relief time can be adjusted;

[0026] 3. Through automated control and precise adjustment, the proportional valve controlled pressure relief system can ensure that the workpiece obtains more stable and precise pressure control during the processing, thereby improving product quality. At the same time, fast and precise pressure relief also reduces waiting time during the production process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the system structure of an embodiment of the utility model.

[0028] Among them, the meanings of the accompanying drawings are as follows: 1. Oil tank; 11. First oil tank; 12. Second oil tank; 2. Master cylinder; 3. First cartridge valve; 4. Main pump; 41. Drive motor; 5. Second cartridge valve; 51. Solenoid valve; 6. Detection device; 61. Pressure gauge; 62. Pressure sensor; 63. Pressure switch; 7. Proportional valve; 71. Filter; 72. Transmitter; 8. Oil supply pipeline; 9. Oil discharge pipeline; 10. Main oil circuit. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] Embodiment 1 of the present utility model is referred to Figure 1As shown, a proportional valve controlled pressure relief system for a magnetic material press is disclosed, comprising an oil tank 1, a master cylinder 2, a first cartridge valve 3, a main pump 4, a drive motor 41, a second cartridge valve 5, a detection device 6 and a proportional valve 7. The main pump 4 is located between the oil tank 1 and the first cartridge valve 3, and is used to pump oil from the oil tank 1 to the first cartridge valve 3. The drive motor 41 is drivingly connected to the main pump 4, and is used to provide power for the main pump 4. The second cartridge valve 5 is arranged between the first cartridge valve 3 and the master cylinder 2. The second cartridge valve 5 is connected to a solenoid valve 51. The detection device 6 is arranged between the second cartridge valve 5 and the master cylinder 2. The proportional valve 7 is arranged between the oil tank 1 and the detection device 6. By adopting the electrical signal control of the proportional valve 7, the automatic control of the hydraulic system is realized, and the problem that manual control cannot meet the automation requirements is solved. The continuous proportional adjustment function of the proportional valve 7 may help to achieve fast and accurate pressure relief, and meet the working condition requirements for adjustable pressure relief time.

[0034] It should be noted that the oil tank 1 may be the same oil tank 1 or two oil tanks 1 as long as they can complete normal oil supply and oil discharge, and this embodiment does not make any specific limitation.

[0035] Specifically, in this embodiment 1, the oil tank 1 includes a first oil tank 11 and a second oil tank 12, an oil supply pipeline 8 is arranged between the first oil tank 11 and the master cylinder 2, and an oil discharge pipeline 9 is arranged between the second oil tank 12 and the master cylinder 2, the oil supply pipeline 8 and the oil discharge pipeline 9 converge into a main oil circuit 10, the main oil circuit 10 is connected to the master cylinder 2, and the detection device 6 is arranged in the main oil circuit 10; therefore, one end of the oil supply pipeline 8 is connected to the main oil circuit 10, and the other end is connected to the first oil tank 11, the oil supply pipeline 8 is sequentially provided with a second cartridge valve 5, a first cartridge valve 3 and a main pump 4 from one end to the other end, the oil discharge pipeline 9 is connected to the main oil circuit 10 at one end, and the other end is connected to the second oil tank 12, and a proportional valve 7 is arranged on the oil discharge pipeline 9. Through the oil discharge pipeline 9, the oil in the master cylinder 2 can be quickly and effectively guided to the second oil tank 12, thereby realizing a rapid pressure relief process; the proportional valve 7 can accurately control the pressure of the oil based on the input electrical signal. During the pressure relief process, the proportional valve 7 can accurately adjust the discharge speed of the oil according to the preset pressure relief curve or speed, thereby realizing accurate pressure relief control.

[0036] In order to further improve the control effect of the proportional valve 7, a filter 71 is connected to the proportional valve 7. The filter 71 is used to filter the pilot control oil of the proportional valve 7 to ensure the cleanliness of the pilot control oil. The filter 71 can effectively filter particles or impurities in the fluid to prevent impurities or contaminants from entering the pilot control part of the proportional valve 7 and affecting the normal operation and performance of the proportional valve 7. Preferably, a transmitter 72 is connected to both sides of the filter 71 to monitor the state of the filter 71 and send a signal by detecting the pressure difference on both sides of the filter 71. When the impurities or contaminants accumulated inside the filter 71 reach a certain level, causing the pressure difference at both ends of the filter 71 to exceed the alarm value, the transmitter 72 will send a signal to remind the operator to replace the filter element of the filter 71. Specifically, the solenoid valve 51 is connected to the second cartridge valve 5 to control the opening and closing of the second cartridge valve 5.

[0037] In the present embodiment 1, the detection device 6 includes a pressure gauge 61, a pressure sensor 62 and a pressure switch 63. The pressure gauge 61 is used to intuitively display the pressure value in the system, and the pressure sensor 62 is used to convert the pressure signal of the system into an electrical signal for use by control elements such as the proportional valve 7 and the drive motor 41. Through the coordinated work of the pressure gauge 61, the pressure sensor 62 and the pressure switch 63, the system can monitor and control the pressure state in real time to ensure the stable operation of the system and the product quality. At the same time, these detection devices 6 also improve the automation level of the system, reduce the difficulty of operation and the error rate. In other embodiments, the specific detection equipment of the detection device 6 is not limited, and it can be used to detect the safety of the oil pressure.

[0038] Preferably, the drive motor 41 is a servo motor, which can convert electrical energy into torque and speed to drive and control the main pump 4. Preferably, the first cartridge valve 3 is a one-way valve, which can prevent oil from flowing back to the main pump 4 and is used to protect the main pump 4.

[0039] During operation, the servo motor drives the main pump 4, and the main pump 4 draws oil from the first oil tank 11. The high-pressure oil output by the main pump 4 enters the master cylinder 2 through the first cartridge valve 3 and the second cartridge valve 5 to pressurize the master cylinder 2. The pressure gauge 61 and the pressure sensor 62 monitor the pressure of the master cylinder 2 in real time. The pressure switch 63 protects the pressure of the master cylinder 2 from exceeding the maximum working pressure. By controlling the speed of the servo motor, the output flow of the main pump 4 can be controlled, thereby controlling the pressurization speed of the master cylinder 2. The speed of the servo motor can be set according to the actual working conditions. The pressure sensor 62 can also be combined to realize closed-loop control of the pressurization of the master cylinder 2. After the pressurization is completed, the pressure of the master cylinder 2 is relieved through the proportional valve 7. The pressure relief speed and pressure relief curve can be set through the human-machine interface so that the pressure relief process of the master cylinder 2 meets different process requirements, improves the quality of the product, and is easy to operate.

[0040] In summary, the proportional valve controlled pressure relief system for a magnetic material press provided by the utility model has the following technical effects:

[0041] 1. By adopting the electrical signal control of the proportional valve 7, the automatic control of the hydraulic system is realized. This solves the problem that the traditional manual control cannot meet the automation requirements, making the pressure relief process more intelligent and convenient;

[0042] 2. The continuous proportional adjustment function of the proportional valve 7 helps to achieve fast and accurate pressure relief. Compared with the traditional manual adjustment of the cartridge valve, the control of the proportional valve 7 is more precise and can accurately control the speed and time of pressure relief, meeting the requirements of working conditions where the pressure relief time can be adjusted;

[0043] 3. Through automated control and precise adjustment, the proportional valve 7 pressure relief system can ensure that the workpiece obtains more stable and precise pressure control during the processing, thereby improving product quality. At the same time, fast and precise pressure relief also reduces waiting time during the production process and improves production efficiency.

[0044] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A proportional valve controlled pressure relief system for a magnetic material press, characterized in that: include: Fuel tank (1); Master cylinder (2); A first cartridge valve (3); a main pump (4), the main pump (4) being located between the oil tank (1) and the first cartridge valve (3) and being used for pumping oil from the oil tank (1) to the first cartridge valve (3); A driving motor (41), the driving motor (41) being drivingly connected to the main pump (4); a second cartridge valve (5), the second cartridge valve (5) being arranged between the first cartridge valve (3) and the master cylinder (2), the second cartridge valve (5) being connected to a solenoid valve (51); A detection device (6), the detection device (6) being arranged between the second cartridge valve (5) and the master cylinder (2); A proportional valve (7), wherein the proportional valve (7) is arranged between the oil tank (1) and the detection device (6).

2. A proportional valve controlled pressure relief system for a magnetic material press according to claim 1, characterized in that: The oil tank (1) comprises a first oil tank (11) and a second oil tank (12); an oil supply pipeline (8) is provided between the first oil tank (11) and the master cylinder (2); and an oil discharge pipeline (9) is provided between the second oil tank (12) and the master cylinder (2).

3. A proportional valve controlled pressure relief system for a magnetic material press according to claim 2, characterized in that: The oil supply pipeline (8) and the oil discharge pipeline (9) converge into a main oil circuit (10), the main oil circuit (10) is connected to the master cylinder (2), and the detection device (6) is arranged on the main oil circuit (10).

4. A proportional valve controlled pressure relief system for a magnetic material press according to claim 1, characterized in that: The detection device (6) comprises a pressure gauge (61), a pressure sensor (62) and a pressure switch (63).

5. The proportional valve controlled pressure relief system of a magnetic material press according to claim 3, characterized in that: The proportional valve (7) is connected to the main oil circuit (10) and the oil discharge pipeline (9) respectively.

6. A proportional valve controlled pressure relief system for a magnetic material press according to claim 5, characterized in that: The proportional valve (7) is also connected to a filter (71), and the filter (71) is used to filter the pilot control oil of the proportional valve (7).

7. A proportional valve controlled pressure relief system for a magnetic material press according to claim 6, characterized in that: The filter (71) is connected to signal transmitters (72) on both sides.

8. The proportional valve controlled pressure relief system for a magnetic material press according to claim 1, characterized in that: The driving motor (41) is a servo motor.

9. A proportional valve controlled pressure relief system for a magnetic material press according to claim 1, characterized in that: The first cartridge valve (3) is a one-way valve.

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