A stable pressure relief structure of a hydraulic pump station

Abstract

The application relates to the technical field of hydraulic devices, in particular to a stable pressure relief structure of a hydraulic pump station, which comprises a valve body, the lower end of the valve body is provided with a liquid inlet, one side of the valve body is provided with a liquid outlet, the inner side of the lower end of the valve body is fixedly connected with a valve seat, the upper end of the valve body is rotationally connected with a threaded pipe, the upper end of the threaded pipe is fixedly connected with a rotating disc, the upper side of the rotating disc is fixedly connected with an air pump, the lower end of the threaded pipe is rotationally connected with a connecting plate, the lower side of the connecting plate is fixedly connected with a top plate, the lower side of the top plate is fixedly connected with a curved capsule, the lower end of the curved capsule is fixedly connected with a bottom plate, the lower side of the bottom plate is fixedly connected with a valve core, the lower end of the valve core is fixedly connected with a hemispherical shell, the inner side of the valve body is fixedly connected with a magnetic isolation plate, the magnetic isolation plate is fixedly connected with an electromagnetic coil group, and the magnetic isolation plate is fixedly connected with a magnetic conducting plate; the curved capsule 6 with adjustable initial pressure, initial rigidity and rigidity change coefficient and the multilayer Halbach array electromagnetic coil group 7 and the coaxial copper cylinder are adopted, so that the stable pressure relief structure of the hydraulic pump station with the advantages of fast response speed, strong pressure relief stability and good dynamic adjustment capacity is provided.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic devices, specifically a stable pressure relief structure for a hydraulic pump station. Background Technology

[0002] Hydraulic pump stations are the power source of hydraulic systems, and the stability of their output hydraulic pressure directly affects the performance and safety of the hydraulic system. During operation, hydraulic systems are prone to excessive pressure in the pipelines due to increased load or rising oil temperature. Therefore, a pressure relief structure is needed to promptly release excess oil pressure, maintain stable system operation, and prevent equipment damage and personnel injury. Currently, most hydraulic pump station pressure relief structures are based on traditional direct-acting relief valves and pilot-operated relief valves, achieving pressure relief through springs with fixed parameters. Direct-acting relief valves have a fast response speed but poor pressure relief stability; pilot-operated relief valves have strong pressure relief stability but a slow response speed.

[0003] To improve the sensitivity and stability of the pressure relief structure in hydraulic pump stations, improved relief valves have emerged in existing technologies. These improvements enhance pressure relief stability by adding adjustable damping devices to direct-acting relief valves and improve pressure relief sensitivity by replacing linear springs with nonlinear springs. However, the adjustable damping devices in these improvements often employ fluid damping or spring damping. While these can reduce valve core vibration, their parameter adjustment range is limited, and their dynamic adjustment capability is insufficient, making them unsuitable for handling high-frequency, large-fluidity changes. Although the stiffness of nonlinear springs can, to some extent, meet the requirements of low stiffness at low pressures and high stiffness at high pressures, their stiffness characteristics are preset and fixed, making it difficult to accurately match system pressure changes. This insufficient dynamic adjustment capability can easily lead to response delays or overshoot.

[0004] Therefore, these issues need to be addressed, hence this application. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a stable pressure relief structure for hydraulic pump stations that features fast response speed, strong pressure relief stability, and good dynamic adjustment capability.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A hydraulic pump station stable pressure relief structure includes a valve body with an inlet at the lower end and an outlet on one side. A valve seat is fixedly connected to the inner side of the lower end of the valve body. A threaded pipe is rotatably connected to the middle position of the upper end of the valve body. A rotating disk is fixedly connected to the upper end of the threaded pipe. An air pump is fixedly connected to the upper side of the rotating disk. The upper side of a connecting plate is rotatably connected to the lower end of the threaded pipe. The upper side of a top plate is fixedly connected to the lower side of the connecting plate. The upper end of a crankcase is fixedly connected to the lower side of the top plate. The upper end of a bottom plate is fixedly connected to the lower side of the bottom plate. The upper end of a valve core is fixedly connected to the lower edge of the valve core. A hemispherical shell is fixedly connected to the lower edge of the valve core.

[0008] Optionally, a magnetic shielding plate is fixedly connected above the outlet of the valve body, an electromagnetic coil assembly is fixedly connected to the upper side of the magnetic shielding plate, a magnetic guide plate is fixedly connected to the upper side of the magnetic shielding plate near the pleural tube, and a magnetic shielding plate is fixedly connected above the electromagnetic coil assembly of the valve body. The valve body, the magnetic shielding plate, and the magnetic guide plate form a sealed cavity. The electromagnetic coil assembly is surrounded by silicone grease. The magnetic shielding plate, the electromagnetic coil assembly, and the magnetic guide plate are further stacked to form at least two sets of electromagnetic devices.

[0009] Optionally, a displacement sensor is fixedly connected to the lower end of the valve core, and a pressure sensor is fixedly connected to the upper side of the base plate.

[0010] Optionally, a waist ring is fixedly connected to the outside of the sac, and the waist ring is arranged in a linear array along the axial direction.

[0011] Optionally, a slider is fixedly connected to the outside of the valve core, a slide rail is fixedly connected to the inside of the valve body, and the slider is slidably connected to the inside of the slide rail. The slider and the slide rail are arranged in a circular array around their axis.

[0012] Optionally, an air supply pipe is provided in the middle of the threaded tube, and air flow holes are provided in the middle of the rotating disk, connecting plate and top plate respectively.

[0013] Optionally, a cooling plate is fixedly connected to the electromagnetic coil assembly on the outside of the valve body.

[0014] Optionally, a control panel is fixedly connected to the upper end of the valve body. The input end of the control panel is electrically connected to the output end of an external power supply. The output end of the control panel is electrically connected to the input end of an electromagnetic coil group. The output end of the control panel is electrically connected to the input end of an air pump. The input end of the control panel is electrically connected to the output end of a position sensor. The input end of the control panel is electrically connected to the output end of a pressure sensor.

[0015] By adopting the above solution, this utility model has at least one of the following beneficial effects compared with the prior art:

[0016] 1. This application uses an air spring as a pressure supply device. The initial pressure of the air spring can be adjusted using an air pump to meet different pressure relief requirements. At the same time, the position of the air spring top plate can be adjusted using a rotating disc and threaded pipe, thereby adjusting the initial volume of the air spring. In conjunction with the air pump, the initial stiffness and stiffness variation coefficient of the air spring can be adjusted to adapt to various pressure conditions with different frequencies and fluctuations. Furthermore, the stiffness of the air spring gradually increases during the movement of the valve core, which meets the requirement of low stiffness at low pressure and high stiffness at high pressure, making the pressure relief structure respond faster when facing high-frequency pressure conditions.

[0017] 2. This application uses an electromagnetic coil assembly and a coaxial copper cylinder as a damping device. Utilizing a Hellbeck array electromagnetic coil assembly, along with a magnetic shielding plate and a magnetic guide plate, a magnetic field is formed pointing from the magnetic guide plate towards the valve body axis. The valve core's movement direction is perpendicular to the magnetic field direction. The multi-layered copper cylinder further enhances the electromagnetic damping effect. Furthermore, the number of turns in the electromagnetic coil assembly gradually increases from bottom to top, resulting in a gradually increasing electromagnetic damping effect. This meets the requirement of low damping at low pressure and high damping at high pressure, making the pressure relief structure more stable when facing high pressure and fluctuating pressure conditions.

[0018] 3. Based on data from displacement sensors and air pressure sensors, this application can dynamically and in real-time adjust the electromagnetic damping strength, air spring pressure, and stiffness by adjusting the current intensity of the electromagnetic coil group, the initial pressure and volume of the air spring. This allows for rapid adaptation to complex pipeline pressure changes, stable pressure relief of the hydraulic pump station, stable operation of the maintenance system, and prevention of equipment damage and personnel injury. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure provided in the embodiments of this application;

[0020] Figure 2 This is a partial cross-sectional structural diagram provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the overall cross-sectional structure provided in the embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the electromagnetic coil assembly structure provided in the embodiments of this application.

[0023] Reference numerals: 1. Valve body; 2. Inlet; 3. Outlet; 4. Valve seat; 5. Valve core; 51. Hemispherical shell; 52. Displacement sensor; 53. Slide rail; 54. Slider; 6. Crank; 61. Waist ring; 62. Top plate; 63. Bottom plate; 64. Pressure sensor; 7. Electromagnetic coil assembly; 71. Magnetic plate; 72. Magnetic shielding plate; 8. Connecting plate; 9. Threaded pipe; 91. Air supply pipe; 10. Rotating disc; 11. Air pump; 12. Air-cooled plate; 13. Control panel. Detailed Implementation

[0024] To better understand the technical solutions shown in the embodiments of this application, the working principle of the existing improved relief valve will be introduced first.

[0025] Existing improved relief valves primarily utilize the high sensitivity of direct-acting relief valves while enhancing their stability under high pressure and high frequency conditions through device modifications. For example, adding a damping device mitigates valve core instability under high pressure conditions, and the adjustable damping device reduces valve core damping under low pressure conditions, thus preserving the high sensitivity of the direct-acting relief valve. Simultaneously, replacing the linear spring in the direct-acting relief valve with a non-linear spring allows the relief valve to adjust its stiffness according to pressure changes, improving its sensitivity under high-frequency, low-pressure conditions and its stability under low-frequency, high-pressure conditions.

[0026] However, in these improvements, adjustable damping devices mostly use fluid damping or spring damping. Although they can reduce the vibration of the valve core, the parameter adjustment range of these devices is limited and their dynamic adjustment capability is insufficient, making it difficult to cope with high-frequency and large fluctuations. Although the stiffness of nonlinear springs can meet the requirements of low stiffness at low pressure and high stiffness at high pressure to a certain extent, their stiffness characteristics are preset and fixed, making it difficult to accurately match the system pressure changes. Their dynamic adjustment capability is insufficient and can easily lead to response delay or overshoot.

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] Please see Figures 1 to 4 This utility model provides a technical solution: a hydraulic pump station stable pressure relief structure, including a valve body 1, an inlet 2 at the lower end of the valve body 1, an outlet 3 on one side of the valve body 1, a valve seat 4 fixedly connected to the inner side of the lower end of the valve body 1, a threaded pipe 9 rotatably connected to the middle position of the upper end of the valve body 1, a rotating disk 10 fixedly connected to the upper end of the threaded pipe 9, an air pump 11 fixedly connected to the upper side of the rotating disk 10, a connecting plate 8 rotatably connected to the lower end of the threaded pipe 9, a top plate 62 fixedly connected to the lower side of the connecting plate 8, a curved bladder 6 fixedly connected to the upper end of the top plate 62, a bottom plate 63 fixedly connected to the lower end of the curved bladder 6, a waist ring 61 fixedly connected to the outer side of the curved bladder 6, the waist ring 61 being arranged in a straight line array along the axial direction, a valve core 5 fixedly connected to the upper end of the bottom plate 63, and a hemispherical shell 51 fixedly connected to the lower edge of the valve core 5.

[0029] Furthermore, the valve seat 4 is an annular base made of soft, water-resistant material, which fits snugly against the outer side of the hemispherical shell 51 to prevent oil from leaking out through gaps. A small hole with threads is located at the center of the upper end of the valve body 1, and it engages with the outer threads of the threaded tube 9. An air supply pipe 91 is located in the center of the threaded tube 9. Air flow holes are provided in the center of the rotating disk 10, connecting plate 8, and top plate 62, allowing the air pump 11 to directly supply air to the crankcase 6. The threaded tube 9 is rotatably connected to the connecting plate 8 via a crossed roller bearing. The threaded tube 9 is fixedly connected to the inner ring of the bearing, and the connecting plate 8 is fixedly connected to the outer ring, ensuring that the threaded tube 9 only drives the connecting plate 8 axially, not circumferentially. The top plate 62 and bottom plate 63 are fixedly connected to the crankcase 6 via a coiled core edge to prevent air leakage from the crankcase 6. The waist ring 61 is vulcanized integrally with the curved bladder 6, constraining the radial deformation of the curved bladder 6 during inflation or compression, preventing excessive expansion of the bladder; it cooperates with the top plate 62 and the bottom plate 63 to ensure the stability of the curved bladder 6 during axial movement. The valve core 5 consists of multiple coaxial hollow copper cylinders, as well as an upper cover and a lower cover. Copper has strong electrical conductivity but weak magnetic permeability, making it suitable as a material for electromagnetic damping; it also has high hardness, good thermal conductivity, and strong chemical stability, making it suitable as a material for relief valves. The shape of the hollow copper cylinders reduces the weight of the valve core 5, reduces the influence of the valve core 5's own inertia on its movement, and improves its sensitivity; on the other hand, it increases the surface area ratio of the valve core 5, allowing the valve core 5 to more effectively cut magnetic field lines during movement, increasing the intensity of eddy currents and enhancing the electromagnetic damping effect.

[0030] Furthermore, the air pump 11 can adjust the initial pressure of the plenum 6 to meet different pressure relief requirements; at the same time, the position of the top plate 62 can be adjusted by using the rotating disc 10 and the threaded pipe 9, thereby adjusting the initial volume of the plenum 6. In conjunction with the air pump 11, the initial stiffness and stiffness variation coefficient of the plenum 6 can be adjusted to adapt to various pressure conditions with different frequencies and fluctuations; and, during the movement of the valve core 5, the stiffness of the plenum 6 gradually increases, which meets the requirement of low stiffness at low pressure and high stiffness at high pressure, making the pressure relief structure respond faster when facing high-frequency pressure conditions.

[0031] Combination Figure 1 and Figure 2 As shown, a magnetic shielding plate 72 is fixedly connected above the outlet 3 of the valve body 1. An electromagnetic coil assembly 7 is fixedly connected to the upper side of the magnetic shielding plate 72. A magnetic conductive plate 71 is fixedly connected to the upper side of the magnetic shielding plate 72 near the curved bladder 6. The magnetic shielding plate 72 is fixedly connected above the electromagnetic coil assembly 7 of the valve body 1. The valve body 1, the magnetic shielding plate 72, and the magnetic conductive plate 71 form a sealed cavity. The electromagnetic coil assembly 7 is surrounded by silicone grease. The magnetic shielding plate 72, the electromagnetic coil assembly 7, and the magnetic conductive plate 71 are stacked to form at least two sets of electromagnetic devices. A cooling plate 12 is fixedly connected to the electromagnetic coil assembly 7 on the outside of the valve body 1.

[0032] Furthermore, the height of the valve core 5's upper cover is consistent with the height of the lowest magnetic shielding plate 72, ensuring that the valve core 5 experiences electromagnetic damping from the very beginning of its movement. This also reduces the material used in the valve core 5, thus lightening its weight. The magnetic shielding plate 72 is an annular plate made of permalloy, isolating the magnetic field coupling between adjacent electromagnetic coil groups 7 and reducing leakage magnetic interference. The magnetic guide plate 71 is an annular wall made of soft magnetic ferrite, guiding the magnetic field generated by the electromagnetic coil group 7 towards the axis, enhancing the magnetic field near the magnetic guide plate 71, and ensuring that the direction of the magnetic field near the magnetic guide plate 71 is perpendicular to the direction of movement of the valve core 5, thereby increasing the intensity of eddy currents and enhancing the electromagnetic damping effect. The valve body 1, magnetic shielding plate 72, and magnetic guide plate 71 form a sealed cavity, preventing oil from seeping into the electromagnetic coil group 7 and causing a short circuit. The electromagnetic coil group 7 generates heat during use; silicone grease can improve the heat exchange efficiency between the electromagnetic coil group 7 and the valve body 1. The air-cooled plate 12 is composed of a thick copper plate and a thin aluminum plate. The thick copper plate is fixedly connected to the electromagnetic coil group 7 on the outside of the valve body 1, and the thin aluminum plate is fixedly connected to the thick copper plate. The thin aluminum plate is arranged in a circular array around the axis to increase the contact area with the outside air and improve heat dissipation efficiency. The valve core 5 also generates heat due to the eddy current effect when it moves, but its material itself has good heat dissipation performance, and the flowing oil will also carry away the heat from the valve core 5, so there is no need to install a separate heat dissipation device.

[0033] Combination Figure 4 As shown, the electromagnetic coil group 7 is arranged according to the coil winding method and the current direction indicated by the arrows. Referring to patent number CN 101107571A, the Hellbecker array is a circular arrangement of the permanent magnet's N pole from left to right, which can enhance the magnetic field strength on the upper side of the permanent magnet. In this application, electromagnetic coils are used instead of permanent magnets, and the electromagnetic coil group 7 is arranged in a ring according to the Hellbecker array to enhance the magnetic field strength inside the electromagnetic coil group 7, increase the eddy current strength, and enhance the electromagnetic damping effect. The electromagnetic coils have an iron core inside, and the number of turns of the electromagnetic coil group 7 gradually increases from bottom to top, resulting in a gradual increase in the magnetic field strength and a gradual enhancement of the electromagnetic damping effect. This meets the requirement of low damping at low pressure and high damping at high pressure, making the pressure relief structure more stable when facing high pressure and large pressure fluctuations.

[0034] Combination Figure 2 As shown, the outer side of the valve core 5 is fixedly connected to the slider 54, the inner side of the valve body 1 is fixedly connected to the slide rail 53, the outer side of the slider 54 is slidably connected to the inner side of the slide rail 53, and the slider 54 and the slide rail 53 are arranged in a circular array around the axis.

[0035] Furthermore, the slider 54 and the slide rail 53 restrict the radial and circumferential movements of the valve core 5, reduce the vibration of the valve core 5 during movement, and improve the stability of the valve core 5 movement.

[0036] Combination Figure 3As shown, a displacement sensor 52 is fixedly connected to the lower end of the valve core 5, and a pressure sensor 64 is fixedly connected to the upper side of the base plate 63. A control panel 13 is fixedly connected to the upper end of the valve body 1. The input terminal of the control panel 13 is electrically connected to the output terminal of an external power supply. The output terminal of the control panel 13 is electrically connected to the input terminal of the electromagnetic coil group 7. The output terminal of the control panel 13 is electrically connected to the input terminal of the air pump 11. The input terminal of the control panel 13 is electrically connected to the output terminal of the displacement sensor 52. The input terminal of the control panel 13 is electrically connected to the output terminal of the pressure sensor 64.

[0037] Furthermore, the displacement sensor 52 and the pressure sensor 64 are equipped with their own power supplies. Based on the data from the displacement sensor 52 and the pressure sensor 64, by adjusting the current intensity of the electromagnetic coil group 7 and the initial pressure and volume of the bellows 6, the electromagnetic damping strength, the pressure and stiffness of the bellows 6 can be dynamically and in real time adjusted. This allows for rapid adaptation to complex pipeline pressure changes, stable pressure relief of the hydraulic pump station, stable operation of the maintenance system, and prevention of equipment damage and personnel injury.

[0038] The working principle of the hydraulic pump station's stable pressure relief structure is as follows:

[0039] Based on the hydraulic system pipeline pressure requirements, the initial pressure and initial stiffness of the breech 6 are preset. The rotating disc 10 is adjusted to move the top plate 62 to the preset position, allowing the breech 6 to reach the preset volume. The control panel 13 activates the air pump 11 to inflate the breech 6. The air pressure sensor 64 transmits the air pressure value inside the breech 6 to the control panel 13. Once the air pressure value inside the breech 6 reaches the preset requirement, the control panel 13 shuts off the air pump 11, stopping the inflation of the breech 6. The inlet 2 is connected to the hydraulic system pipeline, and the outlet 3 is connected to the oil tank.

[0040] The hydraulic system is activated, and displacement sensor 52 transmits its displacement magnitude and velocity to control panel 13. When the pressure in the pipeline reaches the preset pressure, hemispherical shell 51 is pushed open, and oil is discharged from outlet 3. Valve core 5 moves upward, and simultaneously, control panel 13 activates electromagnetic coil group 7, generating a magnetic field that gradually increases from bottom to top. The coaxial copper cylinder in valve core 5 cuts the magnetic field lines, generating eddy currents and inducing an electromagnetic damping effect, improving the stability of valve core 5's movement. The electromagnetic damping effect of valve core 5 gradually increases from bottom to top during movement.

[0041] Based on the displacement magnitude of displacement sensor 52, the initial stiffness of the curved air chamber 6 is redesigned, the rotating disk 10 is adjusted, and the position of the top plate 62 is adjusted, thus changing the initial volume of the curved air chamber 6. The control panel 13 intelligently activates the air pump 11 to adjust the gas volume inside the curved air chamber 6, thereby adjusting the initial pressure, initial stiffness, and stiffness variation coefficient of the curved air chamber 6. Based on the displacement velocity of displacement sensor 52, the control panel 13 intelligently adjusts the current intensity of the electromagnetic coil group 7, adjusts the magnetic field strength near the magnetic plate 71, and adjusts the electromagnetic damping strength.

[0042] The heat generated by the coaxial copper cylinder in the valve core 5 is carried away by the oil, and the heat generated by the electromagnetic coil group 7 is dissipated to the outside air through the silicone grease, valve body 1 and air-cooling plate 12, maintaining the temperature stability of the pressure relief structure.

[0043] This application employs a curved cylinder 6 with adjustable initial pressure, initial stiffness, and stiffness variation coefficient, along with 7 sets of multi-layer Hellbeck array electromagnetic coils and a coaxial copper cylinder, to provide a stable pressure relief structure for a hydraulic pump station with fast response speed, strong pressure relief stability, and good dynamic adjustment capability.

[0044] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A stable pressure relief structure for a hydraulic pump station, characterized in that: The valve body (1) includes a valve body (1), an inlet (2) at the lower end of the valve body (1), an outlet (3) on one side of the valve body (1), a valve seat (4) fixedly connected to the inner side of the lower end of the valve body (1), a threaded pipe (9) rotatably connected to the middle position of the upper end of the valve body (1), a rotating disk (10) fixedly connected to the upper end of the threaded pipe (9), an air pump (11) fixedly connected to the upper side of the rotating disk (10), a connecting plate (8) rotatably connected to the upper side of the lower end of the threaded pipe (9), a top plate (62) fixedly connected to the upper side of the lower side of the connecting plate (8), a curved bladder (6) fixedly connected to the upper end of the lower side of the top plate (62), a bottom plate (63) fixedly connected to the upper side of the lower end of the curved bladder (6), a valve core (5) fixedly connected to the upper side of the lower side of the bottom plate (63), and a hemispherical shell (51) fixedly connected to the lower edge of the valve core (5).

2. The hydraulic pump station stable pressure relief structure according to claim 1, characterized in that: A magnetic shielding plate (72) is fixedly connected above the outlet (3) of the valve body (1). An electromagnetic coil group (7) is fixedly connected to the upper side of the magnetic shielding plate (72). A magnetic guide plate (71) is fixedly connected to the upper side of the magnetic shielding plate (72) near the pleural tube (6). A magnetic shielding plate (72) is fixedly connected above the electromagnetic coil group (7) of the valve body (1). The valve body (1), the magnetic shielding plate (72), and the magnetic guide plate (71) form a sealed cavity. The electromagnetic coil group (7) is surrounded by silicone grease. The magnetic shielding plate (72), the electromagnetic coil group (7), and the magnetic guide plate (71) continue to be stacked to form at least two sets of electromagnetic devices.

3. The hydraulic pump station stable pressure relief structure according to claim 1, characterized in that: The lower end of the valve core (5) is fixedly connected to a displacement sensor (52), and the upper side of the base plate (63) is fixedly connected to a pressure sensor (64).

4. The hydraulic pump station stable pressure relief structure according to claim 1, characterized in that: The outer side of the pleural sac (6) is fixedly connected to a waist ring (61), which is arranged in a straight line along the axial direction.

5. The hydraulic pump station stable pressure relief structure according to claim 1, characterized in that: The outer side of the valve core (5) is fixedly connected to the slider (54), the inner side of the valve body (1) is fixedly connected to the slide rail (53), the outer side of the slider (54) is slidably connected to the inner side of the slide rail (53), and the slider (54) and the slide rail (53) are arranged in a circular array with the axis as the center.

6. The hydraulic pump station stable pressure relief structure according to claim 1, characterized in that: An air supply pipe (91) is provided in the middle of the inside of the threaded pipe (9), and air flow holes are provided in the middle of the rotating disk (10), the connecting plate (8) and the top plate (62).

7. A hydraulic pump station stable pressure relief structure according to claim 1 or 2, characterized in that: The air-cooled plate (12) is fixedly connected to the electromagnetic coil group (7) on the outside of the valve body (1).

8. The hydraulic pump station stable pressure relief structure according to claim 1, characterized in that: The upper end of the valve body (1) is fixedly connected to the control panel (13). The input end of the control panel (13) is electrically connected to the output end of an external power supply. The output end of the control panel (13) is electrically connected to the input end of an electromagnetic coil group (7). The output end of the control panel (13) is electrically connected to the input end of an air pump (11). The input end of the control panel (13) is electrically connected to the output end of a displacement sensor (52). The input end of the control panel (13) is electrically connected to the output end of a pressure sensor (64).

Images