Proportional valve
By combining the drive motor module and the detection module, the valve core position is detected and calculated in real time, the problem of difficult to miniaturize and integrate proportional valves in the prior art is solved, and high-precision adjustment and efficient operation of the equipment are achieved.
Patent Information
- Application Number
- CN202510563962.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-08-01
AI Technical Summary
Existing proportional valves rely on high-power relay-driven solenoids and additional displacement sensors, making it difficult to achieve miniaturization and integration and maintenance difficult.
The drive motor module is used to drive the valve core to make axial linear reciprocating movements in the valve body, combined with the detection module to detect the rotor magnetic field in real time, calculate the valve core position through the control module, realize high-precision flow or pressure adjustment, and is remotely controlled by the upper computer.
The miniaturization and integration of proportional valves are achieved, which improves control accuracy and equipment service life, and reduces maintenance frequency and energy losses.
Smart Images
Figure CN120402443A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of valve control, and particularly to a proportional valve. Background Art
[0002] The proportional valve is an important component in hydraulic equipment and is used to achieve continuous and stepless adjustment of the pressure of the hydraulic oil circuit. In the related art, the proportional valve uses a push rod inside an electromagnet to push the spool in contact with it under the action of the electromagnetic force of the coil, and adjusts the displacement of the push rod by controlling the magnitude of the current to achieve the purpose of controlling the opening of the spool.
[0003] The prior art mainly relies on an electromagnet driven by a high-power relay, determines the neutral state of the spool by adjusting the median value of the voltage or current, and uses an additional displacement sensor to monitor the precise position of the spool. The additional displacement sensor increases the difficulty of maintenance, and the electromagnet and the additional displacement sensor limit the trend of miniaturization and integration of the proportional valve. Summary of the Invention
[0004] In order to achieve the miniaturization and integration of the proportional valve, this application provides a proportional valve.
[0005] A proportional valve provided by this application adopts the following technical solutions: A proportional valve includes a control module, a valve body, a spool, a drive motor module, and a detection module. The interior of the valve body is hollow. The drive motor module is used to drive the spool to perform an axial linear reciprocating motion within the valve body. The drive motor module includes a rotor and a stator. The detection module is used to detect the rotor magnetic field and output a detection signal. The detection module is connected to the control module, and the control module is used to receive the detection signal and calculate the position of the spool.
[0006] By adopting the above technical solutions, the drive motor module drives the spool to perform an axial linear reciprocating motion within the valve body, and combines with the detection module to detect the rotor magnetic field in real time, so as to accurately detect the position of the spool. The control module calculates according to the detection signal and adjusts the position of the spool in real time, thereby achieving high-precision flow or pressure regulation and realizing the miniaturization and integration of the proportional valve.
[0007] Preferably, the drive motor module further includes a motor front cover and a motor rear cover. The motor front cover and the motor rear cover are respectively installed at both ends of the stator. The rotor is installed at the center of the stator, and the rotor is used to drive the spool through a connecting member.
[0008] By adopting the above technical solutions, the compact installation between the stator and the rotor, and the rotor driving the spool through a connecting member ensure the high efficiency and reliability of the motor, which is particularly important for applications that require precise drive and high rotational speed, such as control systems that require rapid response.
[0009] Preferably, it further includes a mounting cover. The detection module includes a magnetic field detection element. The mounting cover is detachably connected to the rear motor cover, and the magnetic field detection element is located inside the mounting cover.
[0010] By adopting the above technical solution, the detachable connection between the mounting cover and the rear motor cover enables the detection module (including the magnetic field detection element) to be conveniently disassembled and repaired.
[0011] Preferably, it further includes a bottom plate. A control box is arranged above the stator. The control module is located inside the control box. The magnetic field detection element is located on the bottom plate. An installation groove is arranged on one side of the mounting cover close to the rear motor cover. The bottom plate is in plug-in fit with the installation groove, and one end of the bottom plate passes through the installation shell and enters the control box.
[0012] By adopting the above technical solution, by placing the control module inside the control box, setting the magnetic field detection element on the bottom plate, and passing the bottom plate through the installation shell and into the control box, this structural design ensures clear functional differentiation and organization of each component, avoids interference between them, and the design of the installation groove firmly fixes the bottom plate inside the mounting cover, further enhancing the protection of the magnetic field detection element and the control module.
[0013] Preferably, it further includes a host computer. The host computer is electrically connected to the control module. The control module is used to receive detection signals, calculate the position of the valve core, and output position signals. The host computer is electrically connected to the drive motor module. The host computer is used to receive position signals and display the position of the valve core.
[0014] By adopting the above technical solution, the electrical connection between the host computer and the control module and the drive motor module enables the control of the valve core to be remotely displayed and adjusted through the host computer, facilitating precise control and adjustment by the operator.
[0015] Preferably, it further includes a valve sleeve. The valve sleeve is located inside the valve body. The valve core makes an axial linear reciprocating motion inside the valve sleeve. The valve sleeve is made of wrought iron.
[0016] By adopting the above technical solution, as the movement guiding component of the valve core, the selection of the material of the valve sleeve is crucial for the service life of the system. The wrought iron material has good wear resistance and corrosion resistance, can withstand the axial reciprocating motion of the valve core, reduce friction and wear, thereby extending the service life of the equipment and reducing the maintenance frequency; the wrought iron material has a low friction coefficient, making the linear reciprocating motion of the valve core inside the valve sleeve more stable, effectively reducing the frictional force, reducing energy loss and equipment wear, and improving the working efficiency of the system. The valve sleeve can be heat-treated separately and then placed inside the valve body, thus solving the problem that the valve body cannot be heat-treated and can only use pig iron material, resulting in poor wear resistance.
[0017] Preferably, the connecting member includes a power transmission rotating shaft, a ball screw, and a guide sliding sleeve. One end of the power transmission rotating shaft is connected to the center of the rotor, and the rotor is used to drive the power transmission rotating shaft to rotate. One end of the ball screw is threadedly connected to the power transmission rotating shaft, the other end of the ball screw is axially fixed to one end of the guide sliding sleeve, the other end of the guide sliding sleeve is axially fixed to one end of the valve core passing through the through hole, and a locking member for axially moving the guide sliding sleeve is provided on the front cover of the motor.
[0018] By adopting the above technical solution, the power transmission rotating shaft is directly connected to the center of the rotor and driven by the rotor, ensuring the transmission efficiency and accuracy. The design of the ball screw provides high rotational accuracy and load capacity, suitable for applications requiring precise control and high torque transmission; one end of the ball screw is threadedly connected to the power transmission rotating shaft, and the other end is axially fixed to the guide sliding sleeve, ensuring the stability and reliability of the connection. This structure can withstand the rotational force from the rotor and effectively transmit it to the guide sliding sleeve.
[0019] Preferably, the locking member includes a positioning guide post. A limit hole is provided on the front cover of the motor, and the positioning guide post is threadedly connected to the limit hole. The positioning guide post is perpendicular to the guide sliding sleeve. A limit groove is provided on the guide sliding sleeve, and when the guide sliding sleeve slides axially along the valve body, the positioning guide post is slidably connected to the limit groove.
[0020] By adopting the above technical solution, when the guide sliding sleeve slides axially along the valve body, the positioning guide post is slidably connected to the limit groove, thereby realizing the axial sliding of the guide sliding sleeve, and further enabling the valve core to slide axially along the length direction of the valve body.
[0021] Preferably, it further includes a limit structure provided at both ends inside the valve body. The limit structure includes a first blocking member, a second blocking member, a threaded plug, and an elastic member. The first blocking member and the second blocking member are respectively installed at both ends inside the valve body. An opening is provided at one end of the valve body, and the threaded plug is installed at the opening and used to close the opening. The elastic member is located between the first blocking member and the threaded plug, and one end of the elastic member is connected to the threaded plug. One end of the valve core passes through the first blocking member and abuts against the end of the elastic member away from the threaded plug. The other end of the valve core passes through the second blocking member and is connected to the drive motor module through a connecting member.
[0022] By adopting the above technical solution, the design of the limit structure ensures the safe operation of the valve core. The combination of the first blocking member, the second blocking member, the threaded plug, and the elastic member enables the valve core to effectively stop further movement when it reaches the set limit position during movement, thereby avoiding equipment damage or operation out of control caused by over-limit movement.
[0023] Preferably, a pressure oil input port, a pressure relief return channel and two actuator drive interfaces are provided on the valve body. Inside the valve body, there are a main pressure relief chamber, a primary power chamber, a buffer energy storage chamber, a secondary power chamber and an auxiliary pressure relief chamber. The two actuator drive interfaces are respectively communicated with the primary power chamber and the secondary power chamber. The main pressure relief chamber is communicated with the auxiliary pressure relief chamber. The buffer energy storage chamber is communicated with the pressure oil input port. The auxiliary pressure relief chamber is communicated with the pressure relief return channel.
[0024] By adopting the above technical solution, different chambers (such as the main pressure relief chamber, the primary power chamber, the buffer energy storage chamber, the secondary power chamber and the auxiliary pressure relief chamber) are arranged inside the valve body, and each chamber has a specific function and role. This partition design makes the functional division of the hydraulic system clear, helps to reduce the interference and cross influence between hydraulic components, improves the stability and reliability of the system, and thus has a directional control valve with multiple flow forms and more than two oil ports, which relies on the relative movement between the spool and the valve body to realize the circulation, cut-off of hydraulic oil and the direction of hydraulic flow.
[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The drive motor module drives the spool to perform axial linear reciprocating motion inside the valve body, and combines with the detection module to detect the rotor magnetic field in real time, so as to accurately detect the position of the spool. The control module calculates according to the detection signal and adjusts the spool position in real time, thereby realizing high-precision flow or pressure regulation, and realizing the miniaturization and integration of the proportional valve; 2. The electrical connection between the upper computer and the control module and the drive motor module enables the control of the spool to be remotely adjusted through the upper computer. The upper computer can receive the position signals from the control module and control the movement of the spool according to these signals, which is convenient for the operator to achieve precise control and adjustment; 3. As the movement guiding component of the spool, the material selection of the valve sleeve is crucial for the service life of the system. Wrought iron material has good wear resistance and corrosion resistance, can withstand the axial reciprocating motion of the spool, reduce friction and wear, thereby prolonging the service life of the equipment and reducing the maintenance frequency; Wrought iron material has a low friction coefficient, making the linear reciprocating motion of the spool in the valve sleeve more stable, effectively reducing the friction force, reducing energy loss and equipment wear, and improving the working efficiency of the system. The valve sleeve can be heat-treated separately and then placed inside the valve body, thus solving the problem that the valve body cannot be heat-treated and can only use pig iron material, resulting in poor wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a schematic diagram of the overall structure of the proportional valve according to the embodiment of the present application.
[0027] Figure 2It is a partial structural schematic diagram of the proportional valve according to the embodiment of the present application, mainly showing the stator and the rotor.
[0028] Figure 3 It is a partial structural schematic diagram of the proportional valve according to the embodiment of the present application, mainly showing the mounting cover and the bottom plate.
[0029] Figure 4 It is a structural block diagram of the proportional valve according to the embodiment of the present application.
[0030] Explanation of reference numerals: 1, valve body; 11, valve sleeve; 2, valve core; 31, first blocking member; 32, second blocking member; 33, threaded plug; 34, elastic member; 4, drive motor module; 41, motor front cover; 42, stator; 43, rotor; 44, motor rear cover; 51, power transmission rotating shaft; 52, ball screw; 53, guide sleeve; 54, positioning guide post; 61, pressure oil input port; 62, pressure relief return channel; 63, actuator drive interface; 64, main pressure relief chamber; 65, primary power chamber; 66, buffer energy storage chamber; 67, secondary power chamber; 68, auxiliary pressure relief chamber; 7, control box; 71, control module; 81, mounting cover; 82, mounting groove; 83, bottom plate; 84, detection module; 9, host computer. Detailed implementation manners
[0031] The following further describes the present application in detail with reference to all the drawings.
[0032] The embodiment of the present application discloses a proportional valve. Referring to Figure 1 , Figure 2 , a proportional valve includes a control module 71, a valve body 1, a valve core 2, a drive motor module 4, and a detection module 84. The valve body 1 is hollow inside and is used to accommodate the valve core 2 and other related components. The drive motor module 4 is used to drive the valve core 2 to perform an axial linear reciprocating motion inside the valve body 1. The detection module 84 is used to detect the magnetic field of the rotor 43 and output a detection signal. The detection module 84 is connected to the control module 71, and the control module 71 is used to receive the detection signal and calculate the position of the valve core 2, achieving the effect of accurately controlling the position of the valve core 2 without an additional displacement sensor.
[0033] Specifically, the drive motor module 4 includes a stator 42 and a rotor 43. The rotor 43 can be made of permanent magnetic materials, which have high magnetic energy product and coercivity and can provide a stable magnetic field. The stator 42 is composed of winding coils and can generate a magnetic field by energization to drive the rotor 43 to rotate. In order to achieve better heat dissipation performance, the outer shell of the stator 42 can be made of aluminum alloy material, which has good thermal conductivity and lightweight characteristics.
[0034] Furthermore, the drive motor module 4 further includes a motor front cover 41 and a motor rear cover 44. The drive motor module 4 uses a stepper motor. The motor front cover 41 and the motor rear cover 44 are fixed at both ends of the stator 42, ensuring the structural stability of the entire motor module. This is of great significance for the motor to withstand the influence of mechanical vibration and external forces during operation, and helps to extend the service life of the motor. The rotor 43 is installed at the center of the stator 42. The rotor 43 is used to drive the valve core 2 to rotate through a connecting member. The motor front cover 41 and the motor rear cover 44 are connected by bolts. The installation of the front cover and the rear cover not only fixes the stator 42 and the rotor 43, but also provides good sealing and protection. This structure can effectively prevent the intrusion of dust, water vapor and other external environments into the internal components of the motor, reducing the frequency of maintenance and cleaning. The design of the motor front cover 41 and the rear cover makes the installation and disassembly of the entire motor module simple and intuitive, facilitating inspection, repair or replacement of damaged components, saving maintenance time and cost. The connecting member includes a power transmission rotating shaft 51, a ball screw 52 and a guide sliding sleeve 53. One end of the power transmission rotating shaft 51 is connected to the center of the rotor 43 assembly and the rotor 43 assembly is used to drive the power transmission rotating shaft 51 to rotate. The other end of the power transmission rotating shaft 51 is provided with a thread. One end of the ball screw 52 is threadedly connected to the power transmission rotating shaft 51. The two ends of the guide sliding sleeve 53 are respectively provided with a first card slot. One end of the guide sliding sleeve 53 is axially fixed to the other end of the ball screw 52 through the first card slot. The other end of the guide sliding sleeve 53 is axially fixed to one end of the valve core 2 passing through the through hole through a second card slot. A locking member for axially moving the guide sliding sleeve 53 is provided on the motor front cover 41. A skeleton oil seal is provided between the motor front cover 41 and the power transmission rotating shaft 51 to prevent hydraulic oil from entering the interior of the drive motor module 4. A plug is provided at the rear end of the power transmission rotating shaft 51 for sealing to prevent hydraulic oil from leaking out. A locking member for axially moving the guide sliding sleeve 53 is provided on the motor front cover 41. The locking member includes a positioning guide post 54. A limit hole is provided on the motor front cover 41. The positioning guide post 54 is threadedly connected to the limit hole. The positioning guide post 54 is arranged perpendicular to the sliding direction of the guide sliding sleeve 53. A limit slot is provided on the peripheral wall of the guide sliding sleeve 53. When the guide sliding sleeve 53 slides axially along the valve body 1, the positioning guide post 54 is slidably connected to the limit slot.
[0035] The detection module 84 is used to detect the magnetic field of the rotor 43, and its specific structure includes a magnetic field detection element. The magnetic field detection element can adopt a Hall effect sensor or a magnetoresistive element, and these elements can sense the change of the magnetic field intensity and convert it into an electrical signal output. For the convenience of installation and maintenance, the detection module 84 is usually installed on the motor rear cover 44 and is connected to the control module 71 by a plug-in method. The detection module 84 can be designed as an independent circuit board, and this circuit board is docked with the interface of the control module 71 through a slot to realize signal transmission.
[0036] It also includes a mounting cover 81 and a base plate 83. The base plate 83 is a PCB board. The mounting cover 81 and the motor rear cover 44 are detachably fixed by a threaded connection, which facilitates subsequent maintenance and repair operations. A mounting slot 82 is provided inside the mounting cover 81, and the base plate 83 is inserted into the mounting slot 82 and fits tightly therewith. The magnetic field detection element in the detection module 84 is pre-buried on the base plate 83 and then embedded in the space area reserved for the mounting cover 81. Such a layout not only helps to protect sensitive electronic components from damage caused by external environmental factors, but also facilitates the operational convenience of future upgrades or replacement of upgraded versions. One end of the base plate 83 passes through the mounting shell and enters the control box 7. The control module 71 is located inside the control box 7. The magnetic field detection element on the base plate 83 is electrically connected to the control module 71 for transmitting detection signals.
[0037] In addition, the base plate 83 serves as a carrying platform to integrate the entire system into an organic whole, and at the same time plays a role in shielding electromagnetic wave radiation, effectively isolating the intrusion of external noise sources, and ensuring that normal working order is not disturbed.
[0038] Regarding the specific implementation scheme of the limiting structure, the limiting structure includes a first blocking member 31, a second blocking member 32, a threaded plug 33, and an elastic member 34. The elastic member 34 is a spring, and the spring material can be selected from high-temperature resistant and corrosion-resistant stainless steel to ensure stability during long-term use. The first blocking member 31 and the second blocking member 32 are respectively installed at the two ends of the valve body 1. The valve body 1 has an opening at one end, and the threaded plug 33 is installed at the opening and closes the opening. The elastic member 34 is located between the first blocking member 31 and the threaded plug 33, and one end of the elastic member 34 is connected to the threaded plug 33. The first blocking member 31 and the second blocking member 32 are both provided with through holes. One end of the valve core 2 passes through the through hole and abuts against the end of the elastic member 34 away from the threaded plug 33. The other end passes through the through hole and is recovered and connected to the drive motor module 4 through a connector. This structure ensures the safe operation of the valve core 2 and avoids equipment damage or uncontrolled operation due to excessive movement.
[0039] Regarding the fluid path planning of the hydraulic chamber, the valve body 1 is provided with a pressure oil input port 61, a pressure relief return channel 62 and two actuator drive interfaces 63. The pressure oil input port 61 is connected to the hydraulic system through the buffer energy storage chamber 66 for introducing the working medium. The pressure relief return channel 62 is connected to the auxiliary pressure relief chamber 68 for discharging excess hydraulic oil. The two actuator drive interfaces 63 are respectively connected to the primary power chamber 65 and the secondary power chamber 67 for providing power to the actuator. In addition, the valve body 1 is also provided with a main pressure relief chamber 64, a primary power chamber 65, a buffer energy storage chamber 66, a secondary power chamber 67 and an auxiliary pressure relief chamber 68. These chambers are interconnected through pipes to form a complete hydraulic circuit.
[0040] A valve sleeve 11 is further arranged inside the valve body 1, and the valve core 2 makes an axial linear reciprocating motion inside the valve sleeve 11. The valve sleeve 11 is made of wrought iron, which has good wear resistance and corrosion resistance, can withstand the friction and wear brought by the axial reciprocating motion of the valve core 2, and reduces the equipment maintenance frequency. The valve sleeve 11 can be heat-treated separately and then assembled into the valve body 1, thus solving the problem that the valve body 1 itself cannot be heat-treated and can only be made of pig iron, resulting in poor wear resistance, and avoiding the problem that it is easy to wear when the valve core 2 moves frequently.
[0041] Refer to Figure 1 , Figure 4 , it further includes a host computer 9, which can be an industrial control computer. The control module 71 receives the detection signal output by the detection module 84, calculates the position of the valve core 2 according to the detection signal, and outputs the position signal to the host computer 9. The host computer 9 is electrically connected to the drive motor module 4, and is used to receive the position signal, display the position of the valve core 2 and control the movement of the valve core 2. Through this closed-loop control method, precise control of the position of the valve core 2 is achieved. The host computer 9 will continuously receive the data report about the exact location of the valve core 2 at the current moment transmitted from the control module 71, and then formulate the next action plan according to the pre-compiled algorithm strategy and send a clear instruction to the drive motor to guide the action execution.
[0042] The implementation principle of a proportional valve in an embodiment of the present application is as follows: The drive motor module 4 drives the valve core 2 to make an axial linear reciprocating motion inside the valve body 1. By combining the detection module 84 to detect the magnetic field of the rotor 43 in real time, the position of the valve core 2 can be accurately detected. The control module 71 calculates according to the detection signal and adjusts the position of the valve core 2 in real time, so as to achieve high-precision flow or pressure regulation, and realize the miniaturization and integration of the proportional valve.
[0043] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A proportional valve, characterized in that: It includes a control module (71), a valve body (1), a valve core (2), a drive motor module (4), and a detection module (84). The interior of the valve body (1) is hollow. The drive motor module (4) is used to drive the valve core (2) to perform an axial linear reciprocating motion within the valve body (1). The drive motor module (4) includes a rotor (43) and a stator (42). The detection module (84) is used to detect the magnetic field of the rotor (43) and output a detection signal. The detection module (84) is connected to the control module (71), and the control module (71) is used to receive the detection signal and calculate the position of the valve core (2).
2. The proportional valve according to claim 1, characterized in that: The drive motor module (4) further includes a motor front cover (41) and a motor rear cover (44). The motor front cover (41) and the motor rear cover (44) are respectively installed at both ends of the stator (42). The rotor (43) is installed at the center of the stator (42), and the rotor (43) is used to drive the valve core (2) through a connecting member.
3. The proportional valve according to claim 2, characterized in that: It further includes a mounting cover (81). The detection module (84) includes a magnetic field detection element. The mounting cover (81) is detachably connected to the motor rear cover (44), and the magnetic field detection element is located within the mounting cover (81).
4. The proportional valve according to claim 3, characterized in that: It further includes a bottom plate (83). A control box (7) is provided above the stator (42). The control module (71) is located within the control box (7). The magnetic field detection element is located on the bottom plate (83). An installation groove (82) is provided on one side of the mounting cover (81) close to the motor rear cover (44). The bottom plate (83) is in plug-in fit with the installation groove (82), and one end of the bottom plate (83) passes through the installation shell and enters the control box (7).
5. A proportional valve according to claim 4, characterized in that: It further includes a host computer (9). The host computer (9) is electrically connected to the control module (71). The control module (71) is used to receive the detection signal, calculate the position of the valve core (2), and output a position signal. The host computer (9) is electrically connected to the drive motor module (4), and the host computer (9) is used to receive the position signal and display the position of the valve core (2).
6. A proportional valve according to claim 1, characterized in that: It further includes a valve sleeve (11). The valve sleeve (11) is located within the valve body (1). The valve core (2) performs an axial linear reciprocating motion within the valve sleeve (11), and the valve sleeve (11) is made of wrought iron.
7. The proportional valve according to claim 2, wherein: The connecting member includes a power transmission rotating shaft (51), a ball screw (52), and a guide sliding sleeve (53). One end of the power transmission rotating shaft (51) is connected to the center of the rotor (43), and the rotor (43) is used to drive the power transmission rotating shaft (51) to rotate. One end of the ball screw (52) is threadedly connected to the power transmission rotating shaft (51). The other end of the ball screw (52) is axially fixed to one end of the guide sliding sleeve (53). The other end of the guide sliding sleeve (53) is axially fixed to one end of the valve core (2) passing through the through hole. A locking member for axially moving the guide sliding sleeve (53) is provided on the motor front cover (41).
8. A proportional valve according to claim 7, characterized in that: The locking member includes a positioning guide post (54). A limit hole is provided on the front cover (41) of the motor. The positioning guide post (54) is threadedly connected to the limit hole. The positioning guide post (54) and the guiding sliding sleeve (53) are arranged perpendicular to each other. A limit groove is provided on the guiding sliding sleeve (53). When the guiding sliding sleeve (53) slides along the axial direction of the valve body (1), the positioning guide post (54) is slidably connected to the limit groove.
9. The proportional valve according to claim 1, characterized in that: It further includes a limit structure arranged at both ends inside the valve body (1). The limit structure includes a first blocking member (31), a second blocking member (32), a threaded plug (33), and an elastic member (34). The first blocking member (31) and the second blocking member (32) are respectively installed at both ends inside the valve body (1). An opening is provided at one end of the valve body (1). The threaded plug (33) is installed at the opening and the threaded plug (33) is used to close the opening. The elastic member (34) is located between the first blocking member (31) and the threaded plug (33), and one end of the elastic member (34) is connected to the threaded plug (33). One end of the valve core (2) passes through the first blocking member (31) and abuts against the end of the elastic member (34) away from the threaded plug (33). The other end of the valve core (2) passes through the second blocking member (32) and is connected to the drive motor module (4) through a connecting member.
10. A proportional valve according to claim 1, characterized in that: The valve body (1) is provided with a pressure oil input port (61), a pressure relief return channel (62), and two actuator drive interfaces (63). Inside the valve body (1), there are a main pressure relief chamber (64), a primary power chamber (65), a buffer energy storage chamber (66), a secondary power chamber (67), and an auxiliary pressure relief chamber (68). The two actuator drive interfaces (63) are respectively communicated with the primary power chamber (65) and the secondary power chamber (67). The main pressure relief chamber (64) is communicated with the auxiliary pressure relief chamber (68). The buffer energy storage chamber (66) is communicated with the pressure oil input port (61). The auxiliary pressure relief chamber (68) is communicated with the pressure relief return channel (62).