Dual-redundancy plug-in type three-position six-way reversing valve

Abstract

The invention discloses a dual-redundancy plug-in type three-position six-way reversing valve, and relates to the technical field of reversing valves, the dual-redundancy plug-in type three-position six-way reversing valve comprises a valve body part and a torque motor part, the torque motor part is divided into an electromagnet part and a reset mechanism part, and the electromagnet part and the reset mechanism part are installed in a valve sleeve in a penetrating mode along a valve element; a valve sleeve of the valve body part is provided with a high-pressure port, a working port and an oil return port, a valve element is provided with diagonal symmetrical straight grooves, and the valve element rotates forwards and backwards to achieve opening and closing of an oil port. The electromagnet part comprises four electromagnets which are arranged in a central symmetry mode, and the opposite angles form a group in parallel and are matched with the armature to drive the valve element to rotate. The reset mechanism part comprises four spring pieces which are arranged in a central symmetry mode, and the four spring pieces form a group in a diagonal mode and are matched with a deflector rod to reset the valve element. The electromagnet and the spring piece both adopt a dual-redundancy design, and when any one fails, the other component in the same group can still maintain the function; according to the reversing valve, switching and on-off of a three-position six-way oil way are achieved through cooperation of all the parts, and the reversing valve has the advantages of being light in weight, compact in structure, high in reliability and high in anti-pollution capacity.

Description

TECHNICAL FIELD

[0001] The technical scheme of the present application relates to the technical field of hydraulic valve control, and particularly relates to a double-redundancy cartridge-mounted three-position six-way directional valve. BACKGROUND

[0002] In a hydraulic control system, a three-position six-way directional valve is a core component for realizing oil path switching and on-off control, and is widely used in driving control scenes of various hydraulic actuators. With the development of hydraulic systems towards high reliability and compactness, the traditional three-position six-way directional valve gradually exposes many deficiencies: on the one hand, the conventional single-redundancy structure design is prone to cause the entire valve group to malfunction when the key components fail, which cannot meet the requirements of fields such as aerospace and heavy machinery that have extremely high requirements for operation safety; on the other hand, some directional valves have problems such as bulky structure, inconvenient installation and maintenance, and weak anti-pollution ability, and their service life and stability performance are limited under complex working conditions.

[0003] Double-redundancy design is a key technology for improving the reliability of hydraulic components, which can ensure normal operation of the equipment when a single component fails through redundant configuration of core functional components. However, existing double-redundancy directional valves have problems such as complex structure design and poor coordination of redundant components, which result in large weight, large space occupation, and difficulty in adapting to the installation requirements of small-sized hydraulic systems. At the same time, the response efficiency of the oil path switching of some products is low, and the stability of the directional valve core is insufficient, which further affects the control accuracy and operation reliability of the hydraulic system. Therefore, it is an urgent need in the current hydraulic valve control technology field to develop a double-redundancy cartridge-mounted three-position six-way directional valve with compact structure, high reliability, strong anti-pollution ability, and high-efficiency cooperative control performance. SUMMARY

[0004] The purpose of the present application is to provide a double-redundancy cartridge-mounted three-position six-way directional valve to solve the deficiencies in the prior art. The core purpose of the present application is to provide a double-redundancy cartridge-mounted three-position six-way directional valve to solve the deficiencies of existing directional valves in reliability, structural layout, and working condition adaptability.

[0005] The specific objectives include: (1) By using the dual redundancy design of electromagnet and spring plate, it is ensured that when a single component fails, the other component in the same group can still maintain the driving or reset function, which significantly improves the working reliability of the directional valve in critical scenarios and avoids the overall function paralysis due to local failure; (2) Optimize the through-type assembly structure of the valve body and torque motor, and combine the adaptation design of the valve core diagonal straight groove and the valve sleeve oil port to achieve a compact layout, reduce the space occupied, reduce the overall weight, and improve the ease of installation; (3) With the synergistic effect of electromagnet driving and spring plate reset, and with the pressure difference between hydraulic pressure and spring force, the valve core can be stably reversed, which enhances the anti-pollution ability of the directional valve and adapts to complex hydraulic conditions; (4) Achieve precise oil circuit switching and on / off control in three positions and six positions to meet the high-efficiency regulation requirements of dual oil circuit hydraulic system, and take into account both control accuracy and operation stability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dual-redundant cartridge-type three-position six-way directional valve, comprising a valve body and a torque motor, wherein the valve body is provided with a valve sleeve and a valve core, the valve sleeve is provided with a high-pressure port, a working port and a return port, and the valve core is provided with diagonally symmetrical straight grooves, the straight grooves are connected to different ports by rotating the valve core in the forward or reverse direction, and the torque motor is divided into an electromagnet part and a reset mechanism part, and both the electromagnet part and the reset mechanism part are installed on the valve sleeve through the valve core of the valve body; The electromagnet section has four electromagnets arranged symmetrically in the center, with two diagonally opposite electromagnets connected in parallel. It is also equipped with an armature fixedly connected to the valve core. The magnetic field generated by the switching on and off of the electromagnets drives the armature to rotate the valve core. The reset mechanism section has four spring plates arranged symmetrically in the center, with two diagonally opposite spring plates connected in parallel. It is also equipped with a lever fixedly connected to the valve core. The valve core is reset by the elastic deformation of the spring plates. Both the electromagnet and the spring plate adopt a double redundancy design. When either the electromagnet or the spring plate fails, the other component in the same group can still maintain the corresponding function. Through the coordinated action of the electromagnet part and the reset mechanism part, the oil circuit switching and on / off control of three positions and six channels can be realized.

[0007] To further optimize this invention, the following technical solutions may be preferred: Preferably, the valve body is mainly composed of a valve sleeve, and internally assembled with a plug, a balance spring, a spring seat, a valve core, an annular spring seat, and a plug ring. The plug and the plug ring form a sealing structure, and the spring seat cooperates with the annular spring seat to support the valve core and the balance spring.

[0008] Preferably, the oil ports on the valve sleeve include two sets of corresponding high-pressure ports, working ports, and return ports, which respectively constitute oil circuits on side A and side B. The two straight grooves on the valve core are normally connected to the working ports on side A and side B, respectively. The connection relationship between the straight grooves and the corresponding high-pressure ports and return ports can be changed by rotating the valve core.

[0009] Preferably, the electromagnet part is based on a support frame, and the four electromagnets are installed at the four corners of the support frame. The armature passes through the valve core and is fixed by a set screw. The magnetic field generated by a set of diagonal electromagnets can drive the armature to generate torque, thereby driving the valve core to rotate synchronously.

[0010] Preferably, the reset mechanism is mainly composed of a cover plate, the four spring plates are installed at the four corners of the cover plate and fixed by fasteners, the lever passes through the valve core and is fixed by a set screw. When the valve core rotates, it drives the lever to squeeze the corresponding set of spring plates to deform. After the electromagnet is de-energized, the elastic reset force of the spring plates drives the valve core to return to its initial position through the lever.

[0011] Preferably, the reversing action of the valve core is achieved by the pressure difference between hydraulic pressure and spring force. After the valve core rotates and changes the oil circuit on / off state, the pressure difference formed on both sides drives the valve core to complete stable reversing, thereby improving the device's anti-pollution capability.

[0012] Preferably, the valve sleeve has a total of six oil ports, namely working port A, high pressure port A, return port A, return port B, high pressure port B and working port B, and the two straight grooves on the valve core are respectively connected to working port A and working port B.

[0013] Preferably, the cover plate of the reset mechanism is fixed above the electromagnet part by clamping screws, and the cover plate also serves to fix and limit the electromagnet.

[0014] Compared with the prior art, the present invention has the following significant advantages: (1) Significantly improved reliability: Both the electromagnet and the spring plate adopt a double redundancy design with a diagonal pair. When any electromagnet or spring plate fails, the other component in the same group can still maintain the driving or reset function, effectively avoiding the paralysis of the entire valve group due to local failure. It is suitable for scenarios with extremely high safety requirements such as aerospace and heavy machinery, and greatly reduces the risk of system operation.

[0015] (2) Compact structure and easy installation: By optimizing the through-type assembly structure of the valve body and torque motor, and combining the matching design of the valve core diagonal straight groove and the valve sleeve oil port, the component integration layout is realized, which significantly reduces the space occupied by the directional valve and the overall weight. The installation and maintenance process is simple and efficient, and it is suitable for the assembly requirements of miniaturized hydraulic systems.

[0016] (3) Strong anti-pollution capability and wide adaptability to working conditions: The valve core switching is achieved by the pressure difference between hydraulic pressure and spring force. The participation of hydraulic force can reduce the influence of impurities on the valve core action and improve the operating stability under complex working conditions. At the same time, the sealing structure and oil circuit design are reasonable, which further enhances the anti-pollution capability and extends the product service life.

[0017] (4) Precise control and efficient response: The electromagnet part achieves precise forward and reverse rotation of the valve core through the on / off control of the diagonal parallel group, in conjunction with the fixed connection between the armature and the valve core; the spring plate and lever of the reset mechanism work together to ensure the valve core resets quickly and stably. The two work together to achieve efficient switching and on / off control of the three-position six-way oil circuit, taking into account the control accuracy and response efficiency of the hydraulic system, and meeting the dual oil circuit regulation requirements. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the invention; Figure 2 This is a top view of the present invention; Figure 3 This is a cross-sectional view of the electromagnet portion of the present invention; Figure 4 This is a schematic diagram of the valve sleeve structure of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the valve sleeve structure of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the valve core structure of the present invention.

[0019] Among them, 11. Valve sleeve; 12. Valve core; 13. Spring seat; 14. Annular spring seat; 15. Balance spring; 16. Plug; 17. Plug ring; 18. Sealing ring; 19. High pressure port A; 110. Low pressure port A; 111. Working port A; 112. High pressure port B; 113. Low pressure port B; 114. Working port B; 115. Straight groove; 21. Support frame; 22. Electromagnet; 23. Armature; 24. Set screw; 25. Cover plate; 26. Lever; 27. Spring plate; 28. Clamping screw; 29. ​​Screw. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0022] Example 1: A dual-redundant cartridge-type three-position six-way directional valve includes a valve body and a torque motor. The torque motor is divided into an electromagnet and a reset mechanism. Both the electromagnet and the reset mechanism are mounted on the valve sleeve through the valve core of the valve body. The valve body is provided with a valve sleeve and a valve core. The valve sleeve is equipped with a high-pressure port, a working port and a return port. The valve core is provided with diagonally symmetrical straight grooves. The straight grooves are matched with different oil ports by rotating the valve core in the forward or reverse direction. The electromagnet section has four electromagnets arranged symmetrically in the center, with two diagonally opposite electromagnets installed in parallel. It is equipped with an armature that is fixedly connected to the valve core. The magnetic field generated by the switching on and off of the electromagnets drives the armature to rotate the valve core. The reset mechanism section has four spring plates arranged symmetrically in the center, with two diagonally opposite spring plates installed in a group. It is equipped with a lever that is fixedly connected to the valve core. The valve core is reset by the elastic deformation of the spring plates. Both the electromagnet and the spring plate adopt a double redundancy design. If either the electromagnet or the spring plate fails, the other component in the same group can still maintain the corresponding function. Through the coordinated action of the electromagnet part and the reset mechanism part, the oil circuit switching and on / off control of three positions and six channels can be realized.

[0023] In a preferred embodiment, the valve body is mainly composed of a valve sleeve, and internally assembled a plug, a balance spring, a spring seat, a valve core, an annular spring seat, and a plugging ring. The plug and the plugging ring form a sealing structure, and the spring seat and the annular spring seat cooperate to support the valve core and the balance spring.

[0024] In a preferred embodiment, the oil ports on the valve sleeve include two sets of correspondingly installed high-pressure ports, working ports, and return ports, which respectively constitute oil circuits on side A and side B. The two straight grooves on the valve core are normally connected to the working ports on side A and side B, respectively. The connection relationship between the straight grooves and the corresponding high-pressure ports and return ports is changed by rotating the valve core.

[0025] In a preferred embodiment, the electromagnet part is based on a support frame, with four electromagnets installed at the four corners of the support frame. The armature passes through the valve core and is fixed by a set screw. The magnetic field generated by a set of diagonal electromagnets can drive the armature to generate torque, thereby driving the valve core to rotate synchronously.

[0026] In a preferred embodiment, the reset mechanism is mainly composed of a cover plate, with four spring plates installed at the four corners of the cover plate and fixed by fasteners. The lever passes through the valve core and is fixed by a set screw. When the valve core rotates, it drives the lever to squeeze the corresponding set of spring plates to deform. After the electromagnet is de-energized, the elastic reset force of the spring plates drives the valve core to return to its initial position through the lever.

[0027] In a preferred embodiment, the valve core's reversing action is achieved through the pressure difference between hydraulic pressure and spring force. After the valve core rotates and changes the oil circuit's on / off state, the pressure difference formed on both sides drives the valve core to complete a stable reversing action, thereby improving the device's anti-pollution capability.

[0028] In a preferred embodiment, the valve sleeve has a total of six oil ports, namely working port A, high pressure port A, return port A, return port B, high pressure port B and working port B, and the two straight grooves on the valve core are respectively connected to working port A and working port B.

[0029] In a preferred embodiment, the cover plate of the reset mechanism is fixed above the electromagnet part by clamping screws, and the cover plate also serves to fix and limit the electromagnet.

[0030] The following description, based on the above technical solution and in conjunction with the accompanying drawings, elaborates on its structural composition and working principle, as follows: Figures 1-6 As shown, the dual-redundant cartridge-type three-position six-way directional valve of the present invention includes a valve body and a torque motor. The torque motor is divided into an electromagnet and a reset mechanism. The support frame 21 of the electromagnet and the cover plate 25 of the reset mechanism are both installed through the valve core 12 to form an integrated assembly structure to ensure operational stability.

[0031] I. Assembly and Working Principle of Valve Body The valve body is mainly composed of valve sleeve 11. Inside, along the axial direction, a plug 16, a balance spring 15, a spring seat 13, a valve core 12, an annular spring seat 14, a balance spring 15, and a plug ring 17 are assembled sequentially. A sealing ring 18 is installed in the corresponding sealing groove. The plug 16 and the plug ring 17 cooperate to achieve oil sealing at both ends. The valve sleeve 11 has six oil ports, namely, working port A111, high pressure port A19, return port A110, return port B113, high pressure port B112, and working port B114, forming two sets of corresponding oil circuits, A and B. The valve core 12 has diagonally symmetrical straight grooves 115, and the two straight grooves 115 are normally open to working port A111 and working port B114, respectively.

[0032] In the initial state, the straight groove 115 of the valve core 12 is connected to the return oil port A110 and the return oil port B113 respectively, and the working port is connected to the return oil port. When the valve core 12 rotates clockwise, one side of the straight groove 115 disengages from the return oil port A110 and connects to the high-pressure port A19, while the intersection area of ​​the other side of the straight groove 115 and the return oil port B113 increases. At this time, the working port A111 switches to connect with the high-pressure port A19, realizing the reversal of the oil circuit on side A. When the valve core 12 rotates counterclockwise, the other side of the straight groove 115 disengages from the return oil port B113 and connects to the high-pressure port B112, and the working port B114 switches to connect with the high-pressure port B112, realizing the reversal of the oil circuit on side B. The reversing action of the valve core 12 is driven by the pressure difference between the hydraulic pressure and the elastic force of the balance spring 15, effectively reducing the influence of impurities on the action and improving the anti-contamination capability.

[0033] II. Assembly and Working Principle of the Torque Motor (I) Electromagnet Section The electromagnet section is mainly composed of a support frame 21, with four electromagnets 22 symmetrically installed at the four corners. Two diagonally opposite electromagnets 22 are connected in parallel as a group. An armature 23 is installed through the valve core 12 at the center of the electromagnet section and is tightened and fixed by a set screw 24, so that the armature 23 and the valve core 12 form a synchronous linkage structure. When one group of diagonally opposite electromagnets 22 is energized, a magnetic field is generated to attract the armature 23 to rotate and generate torque, thereby driving the valve core 12 to rotate synchronously; when the other group of diagonally opposite electromagnets 22 is energized, the armature 23 drives the valve core 12 to rotate in the opposite direction. Because the electromagnets 22 adopt a double redundancy design, even if any electromagnet 22 in the same group fails, the other electromagnet 22 can still generate sufficient torque to drive the valve core 12 to operate, ensuring functional continuity.

[0034] (II) Reset Mechanism The reset mechanism is primarily composed of a cover plate 25, which is fixed above the electromagnet section by clamping screws 28 and also functions as a fixing and limiting electromagnet 22. Four spring plates 27 are symmetrically installed at the four corners of the cover plate 25, with two diagonally opposite positions forming a group. A lever 26 passes through the valve core 12 and is installed above the cover plate 25, secured by set screws 24. When the valve core 12 rotates, the lever 26 rotates synchronously and compresses the corresponding group of spring plates 27, causing them to elastically deform. When the electromagnet section is de-energized and the magnetic field disappears, the elastic reset force of the spring plates 27 drives the valve core 12 back to its initial position via the lever 26. The spring plates 27 also employ a double-redundancy design; if any spring plate 27 fails, the other spring plate 27 in the same group can still complete the reset action, ensuring reset reliability.

[0035] III. Working process of this product Upon receiving a control signal, the corresponding diagonal electromagnet 22 is energized to generate a magnetic field, driving the armature 23 to rotate the valve core 12, thus switching the oil circuit. At this time, the corresponding spring plate 27 is deformed by the lever 26, storing elastic potential energy. When the control signal is disconnected, the electromagnet 22 is de-energized, the magnetic field disappears, and the spring plate 27 releases its elastic potential energy, resetting the valve core 12 via the lever 26, restoring the oil circuit to its initial state. Throughout the process, the dual-redundancy design ensures uninterrupted function even in the event of critical component failure, while the through-type assembly and pressure differential drive design ensure a compact structure and stable operation, meeting the precise and efficient control requirements of a dual-oil-circuit hydraulic system.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-redundant cartridge-type three-position six-way directional valve, characterized in that, The device includes a valve body and a torque motor. The valve body has a valve sleeve and a valve core. The valve sleeve is equipped with a high-pressure port, a working port and a return port. The valve core has diagonally symmetrical straight grooves. The straight grooves are connected to different ports by rotating the valve core in the forward or reverse direction. The torque motor is divided into an electromagnet part and a reset mechanism part. Both the electromagnet part and the reset mechanism part are installed on the valve sleeve through the valve core of the valve body. The electromagnet section has four electromagnets arranged symmetrically in the center, with two diagonally opposite electromagnets connected in parallel. It is also equipped with an armature fixedly connected to the valve core. The magnetic field generated by the switching on and off of the electromagnets drives the armature to rotate the valve core. The reset mechanism section has four spring plates arranged symmetrically in the center, with two diagonally opposite spring plates connected in parallel. It is also equipped with a lever fixedly connected to the valve core. The valve core is reset by the elastic deformation of the spring plates. Both the electromagnet and the spring plate adopt a double redundancy design. When either the electromagnet or the spring plate fails, the other component in the same group can still maintain the corresponding function. Through the coordinated action of the electromagnet part and the reset mechanism part, the oil circuit switching and on / off control of three positions and six channels can be realized.

2. The dual-redundant cartridge-type three-position six-way directional valve according to claim 1, characterized in that, The valve body is mainly composed of a valve sleeve, and internally assembled with a plug, a balance spring, a spring seat, a valve core, an annular spring seat, and a plugging ring. The plug and the plugging ring form a sealing structure, and the spring seat cooperates with the annular spring seat to support the valve core and the balance spring.

3. A dual-redundant cartridge-type three-position six-way directional valve according to claim 1, characterized in that, The oil ports on the valve sleeve include two sets of corresponding high-pressure ports, working ports, and return ports, which respectively form oil circuits on side A and side B. The two straight grooves on the valve core are normally connected to the working ports on side A and side B, respectively. The connection between the straight grooves and the corresponding high-pressure ports and return ports can be changed by rotating the valve core.

4. A dual-redundant cartridge-type three-position six-way directional valve according to claim 1, characterized in that, The electromagnet part is based on a support frame, with four electromagnets installed at the four corners of the support frame. The armature passes through the valve core and is fixed by a set screw. The magnetic field generated by a set of diagonal electromagnets can drive the armature to generate torque, thereby driving the valve core to rotate synchronously.

5. A dual-redundant cartridge-type three-position six-way directional valve according to claim 1, characterized in that, The reset mechanism is mainly composed of a cover plate. The four spring plates are installed at the four corners of the cover plate and fixed with fasteners. The lever passes through the valve core and is fixed with a set screw. When the valve core rotates, it drives the lever to squeeze the corresponding set of spring plates to deform. After the electromagnet is de-energized, the elastic reset force of the spring plates drives the valve core to return to its initial position through the lever.

6. A dual-redundant cartridge-type three-position six-way directional valve according to claim 1, characterized in that, The valve core's reversing action is achieved through the pressure difference between hydraulic pressure and spring force. After the valve core rotates and changes the oil circuit's on / off state, the pressure difference formed on both sides drives the valve core to complete stable reversing, thus improving the device's anti-pollution capability.

7. A dual-redundant cartridge-type three-position six-way directional valve according to claim 1, characterized in that, The valve sleeve has a total of six oil ports, namely working port A, high pressure port A, return port A, return port B, high pressure port B and working port B. The two straight grooves on the valve core are respectively connected to working port A and working port B.

8. A dual-redundant cartridge-type three-position six-way directional valve according to claim 1, characterized in that, The cover plate of the reset mechanism is fixed above the electromagnet by clamping screws, and the cover plate also serves to fix and limit the electromagnet.

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