Electromagnetic valve

Abstract

The electromagnetic valve comprises an electromagnetic mechanism, the electromagnetic mechanism comprises a shell, a first coil, a second coil, a static iron core and a movable iron core, the movable iron core can move relative to the static iron core, and a pressure relief opening is formed in the static iron core; the valve body is connected with the static iron core, and a valve cavity, a working port and an inlet are formed in the valve body, and the working port and the inlet are communicated with the valve cavity; the reset spring is arranged in the valve cavity; a magnet for keeping the movable iron core static is arranged between the first coil and the second coil; the lower end of the movable iron core is located in the valve cavity, and the movable iron core is provided with a channel communicating with the valve cavity and the pressure relief opening. The electromagnetic valve has the following advantages that through the design of the first coil and the second coil, bidirectional movement of the movable iron core can be achieved, and the blocking effect on an inlet and a pressure relief opening is good; the pressure relief opening is formed in the static iron core, so that the pipeline design on the valve body is reduced, and the processing difficulty of the valve body is reduced; and the magnet is used for keeping the movable iron core static, so that the movable iron core is kept stable in a power-off state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to an electromagnetic valve. BACKGROUND

[0002] In the prior art, an electromagnetic valve is a sealed bidirectional valve that controls the mechanical movement of a valve core through the on-off of the current of an electromagnet coil. When the current is on, the valve core moves through the electromagnet, and when the current is off, the valve body resets through a reset spring. The electromagnetic valve determines the flow of gas in the valve body through the movement of the valve core. However, the electromagnetic valve needs to be powered for a long time, and the power-off will affect the work. Moreover, the gas path is usually on the valve body, and the valve body structure is complex. SUMMARY

[0003] An object of the present application is to provide an electromagnetic valve with good sealing performance and simple valve body structure.

[0004] The technical scheme adopted by the present application is as follows: an electromagnetic valve, comprising: an electromagnetic mechanism, the electromagnetic mechanism comprising a shell, a first coil, a second coil, a static iron core and a moving iron core, the first coil and the second coil being arranged in the shell and located outside the static iron core, the static iron core and the moving iron core both being arranged through the shell, the moving iron core being capable of moving relative to the static iron core, and the static iron core being provided with a pressure relief port; a valve body, the valve body being connected with the static iron core, the valve body being provided with a valve cavity, a working port and an inlet port communicating with the valve cavity; a reset spring, the reset spring being arranged in the valve cavity, and the two ends of the reset spring being respectively attached to the moving iron core and the static iron core; a magnet is arranged between the first coil and the second coil to keep the moving iron core stationary, the lower end of the moving iron core is located in the valve cavity, the moving iron core is provided with a channel communicating the valve cavity with the pressure relief port, in the state that the first coil is powered, the moving iron core blocks the pressure relief port, and the working port and the inlet port are communicated, and in the state that the second coil is powered, the moving iron core blocks the inlet port, and the working port and the pressure relief port are communicated.

[0005] Compared with the prior art, the present application has the advantages that the design of the first coil and the second coil enables the moving iron core to move in two directions, the blocking effect of the inlet port and the pressure relief port is good, the risk of gas or liquid leakage is reduced, and the stability of the work can be maintained; the pressure relief port is arranged on the static iron core, which reduces the pipeline design on the valve body, reduces the processing difficulty of the valve body, improves the overall production efficiency, and the connection of the pressure relief port is arranged on the static iron core, which reduces the number of joints to be connected on the valve body, makes the installation of the joints more convenient, and facilitates the external connection.

[0006] In some embodiments of the present application, a sealing gasket is arranged between the valve body and the shell.

[0007] In some embodiments of the present application, a second boss is arranged on the static core, and the pressure relief port is located on the top surface of the second boss.

[0008] Further, a second rubber plug for abutting the pressure relief port is arranged on the moving core; a second mounting hole is arranged on the moving core, and the second rubber plug is located on the second mounting hole; a second through hole is arranged on the second mounting hole, and the second through hole is in communication with the valve cavity; a supporting spring is arranged in the second mounting hole, one end of the supporting spring abuts the second rubber plug, and the other end of the supporting spring abuts the bottom of the second mounting hole.

[0009] In some embodiments of the present application, a first boss is arranged on the valve cavity, and the inlet is located on the top surface of the first boss.

[0010] Further, a first rubber plug for abutting the inlet is arranged on the moving core; a first mounting hole is arranged on the moving core, and the first rubber plug is located on the first mounting hole; a first through hole is arranged on the first mounting hole, and the first through hole is in communication with the valve cavity.

[0011] In some embodiments of the present application, the static core comprises an upper portion and a lower portion, the pressure relief port is located on the upper portion, and the moving core is slidably arranged on the lower portion; a groove is arranged on the moving core, and a channel is formed between the groove and the lower portion.

[0012] In some embodiments of the present application, a first coil former is arranged between the first coil and the static core; and a second coil former is arranged between the second coil and the static core.

[0013] In some embodiments of the present application, a threaded segment is arranged on the static core, the threaded segment extends out of the shell, a locking nut is arranged on the threaded segment, the bottom surface of the locking nut abuts the top surface of the shell; and a first sealing element is arranged between the locking nut and the shell.

[0014] In some embodiments of the present application, the shell comprises an outer shell and an inner shell arranged in the outer shell, the first coil and the second coil are arranged in the inner shell; a cable cavity and a cable hole in communication with the cable cavity are further arranged on the outer shell, and a gap in communication with the cable cavity is arranged on the inner shell. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structure schematic of embodiment 1 of the present application Figure 1 ; Figure 2 is a structure schematic of embodiment 1 of the present application Figure 2 ; Figure 3 is a top view of embodiment 1 of the present application; Figure 4 isFigure 3 A cross-sectional view along the AA direction; Figure 5 yes Figure 3 A cross-sectional view along the BB direction; Figure 6 This is an exploded view of Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the structure of the first coil frame in Embodiment 1 of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the structure of the first coil frame in Embodiment 1 of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the moving iron core of Embodiment 1 of the present invention.

[0016] In the diagram: 1. Electromagnetic mechanism; 2. Housing; 3. First coil; 4. Second coil; 5. Stationary iron core; 6. Moving iron core; 7. Pressure relief port; 8. Valve body; 9. Valve cavity; 10. Working port; 11. Inlet; 12. Return spring; 13. Channel; 14. Magnet; 15. Sealing gasket; 16. Second boss; 17. Second rubber plug; 18. Second mounting hole; 19. Second through hole; 20. Support spring; 21. First boss; 22. First rubber plug; 23. First mounting hole; 24. First through hole; 25. 26. Upper part; 27. Lower part; 28. Groove; 29. ​​First coil frame; 30. Second coil frame; 31. Threaded section; 32. Locking nut; 33. First seal; 34. Outer shell; 35. Inner shell; 36. Cable cavity; 37. Cable hole; 38. Notch; 39. Winding tube; 40. Upper baffle; 41. Lower baffle; 42. Wire hole; 43. Wire groove; 44. Wire routing groove; 45. Positioning plate; 46. Limiting rod; 47. Movable hole; 48. Fixing groove; 49. Locking block; 40. Second seal. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0018] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0019] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0020] Example 1: This embodiment provides a solenoid valve, such as Figures 1-6 As shown, it includes: Electromagnetic mechanism 1, which includes housing 2, first coil 3, second coil 4, stationary iron core 5 and moving iron core 6. The first coil 3 and second coil 4 are disposed inside the housing 2 and located outside the stationary iron core 5. The stationary iron core 5 and the moving iron core 6 are both installed on the housing 2. The moving iron core 6 can move relative to the stationary iron core 5. The stationary iron core 5 is provided with a pressure relief port 7. Valve body 8, which is connected to stationary iron core 5, and valve body 8 is provided with valve cavity 9 and working port 10 and inlet 11 that connect to valve cavity 9; A reset spring 12 is disposed in the valve cavity 9, and the two ends of the reset spring 12 are respectively attached to the moving iron core 6 and the stationary iron core 5. A magnet 14 is provided between the first coil 3 and the second coil 4 to keep the moving iron core 6 stationary; the lower end of the moving iron core 6 is located inside the valve cavity 9, and a channel 13 is provided on the moving iron core 6 to connect the valve cavity 9 and the pressure relief port 7; when the first coil 3 is energized, the moving iron core 6 blocks the pressure relief port 7, and the working port 10 is connected to the inlet 11; when the second coil 4 is energized, the moving iron core 6 blocks the inlet 11, and the working port 10 is connected to the pressure relief port 7. In this embodiment, the moving iron core 6 may be provided with an outward protrusion that fits with the lower end of the return spring 12 or an inward recessed groove that fits with the lower end of the return spring 12; the first coil 3 and the second coil 4 are concentric and arranged vertically.

[0021] The design of the first coil 3 and the second coil 4 enables bidirectional movement of the moving iron core 6, providing a good sealing effect for the inlet 11 and the pressure relief port 7, reducing the risk of gas or liquid leakage, and maintaining operational stability. The pressure relief port 7 is located on the stationary iron core 5, reducing the piping design on the valve body 8, lowering the processing difficulty of the valve body 8, and improving overall production efficiency. Furthermore, the connection of the pressure relief port 7 is located on the stationary iron core 5, reducing the number of joints that need to be connected on the valve body 8, making it easier to install joints and connect externally. The return spring 12 is used to drive the moving iron core 6 to return to the inlet 11 when the second coil 5 is energized, so that the moving iron core 6 seals the inlet 11. The magnet 14 is used to keep the moving iron core 6 stationary, so that the moving iron core 6 remains stable when de-energized, thereby locking the moving iron core 6 to seal the pressure relief port 7 or the inlet 11.

[0022] During operation, the first coil 3 is energized to increase the upper magnetic force. The stationary iron core 5 attracts the moving iron core 6, causing the moving iron core 6 to move towards the pressure relief port 7 until the moving iron core 6 is in contact with the pressure relief port 7, thus sealing the pressure relief port 7. At this time, gas or liquid enters the valve chamber 9 from the inlet 11 and exits from the working port 10. After the moving iron core 6 seals the pressure relief port 7, the first coil 3 is de-energized, and the magnetic force of the magnet 14 can maintain the sealing state of the moving iron core 6 on the pressure relief port 7. When pressure is released, the second coil 4 is energized, and the magnetic force generated cancels out the magnetic force of the magnet 14, causing the moving iron core 6 to move toward the valve body 8 under the action of the return spring 12 until the moving iron core 6 is in contact with the inlet 11 to block the inlet 11. At this time, the gas or liquid in the working part enters the valve chamber 9 from the working port 10, goes along the channel 13 to the upper end of the moving iron core 6, and then exits through the pressure relief port 7. After the moving iron core 6 blocks the inlet 11, the second coil 4 is de-energized. The elastic force of the return spring 12 and the magnetic force of the magnet 14 can maintain the blocking state of the moving iron core 6 on the inlet 11, which is more energy-efficient.

[0023] To ensure reliable installation of the first coil 3 and the second coil 4, a first coil frame 28 is provided between the first coil 3 and the stationary iron core 5; a second coil frame 29 is provided between the second coil 4 and the stationary iron core 5. Figure 7 , Figure 8As shown, both the first coil frame 28 and the second coil frame 29 are made of non-magnetic materials. The first coil frame 28 includes a winding tube 38, an upper baffle 39 extending outward from the top of the winding tube 38, and a lower baffle 40 extending outward from the bottom of the winding tube 38. The lower baffle 40 has a wire hole 41 near the winding tube 38 and a wire groove 42 recessed inward from the edge. The bottom surface of the lower baffle 40 has two inwardly recessed wire routing grooves 43, one of which communicates with the wire hole 41, and the other... One wire routing groove 43 is connected to the wire threading groove 42. The outlets of the two wire routing grooves 43 are located on the same side and separated from each other. The structure of the second coil frame 29 is the same as the first coil frame 28 rotated 180°, that is, the lower baffle 40 is located above and the upper baffle 39 is located below. This makes the wire threading hole 41, the wire threading groove 42 and the wire routing groove 43 face the first coil frame 28, so that the wires of the first coil 3 and the second coil 4 are concentrated, which facilitates the wire routing. The inner hole of the winding tube 38 is matched with the outer wall of the stationary iron core 5.

[0024] The first coil 3 is wound around the winding tube 38. The upper baffle 39 and the lower baffle 40 can block the first coil 3 from both sides, ensuring reliable winding and reducing winding difficulty. The lead wire of the first coil 3 enters the wiring channel 43 through the wire hole 41 and the wire groove 42, and then exits along the wiring channel 43 to the outlet of the wiring channel 43, facilitating subsequent circuit connection. Similarly, the second coil 4 is wound around the winding tube 38. The lead wire of the second coil 4 enters the wiring channel 43 through the wire hole 41 and the wire groove 42, and then exits along the wiring channel 43 to the outlet of the wiring channel 43.

[0025] By setting the first coil frame 28 and the second coil frame 29, reliable insulation between the first coil 3 and the second coil 4 and the stationary iron core 5 is achieved, avoiding the risk of short circuits between the coils and the iron core. Furthermore, precise positioning is provided for coil winding, ensuring the uniformity of the number of coil turns and their arrangement, thereby guaranteeing the stability and consistency of the magnetic field strength during the operation of the electromagnetic mechanism 1. Simultaneously, the first coil frame 28 and the second coil frame 29 also effectively protect the coils, preventing mechanical damage during assembly or use, further extending the overall service life of the solenoid valve.

[0026] In this embodiment, the lower baffle 40 of the first coil frame 28 is provided with a downwardly extending positioning plate 44. The side of the magnet 14 fits against the positioning plate 44, so that the magnet 14 can be accurately installed and prevent the magnet 14 from moving relative to the first coil frame 28. Similarly, the positioning plate 44 of the second coil frame 29 located above cooperates with the magnet 14, so that the magnet 14 can be accurately installed and prevent the magnet 14 from moving relative to the second coil frame 29.

[0027] To improve operational stability, a sealing gasket 15 is provided between the valve body 8 and the housing 2. The upper surface of the sealing gasket 15 is in contact with the housing 2, and the lower surface of the sealing gasket 15 is in contact with the valve body 8 and the stationary iron core 5. The sealing gasket 15 effectively prevents gas or liquid in the valve cavity 9 from leaking through the connection gap, ensuring that the gas or liquid entering the valve cavity 9 can be stably output from the working port 10 or the pressure relief port 7 according to the expected path.

[0028] To improve the reliability of the sealing, the stationary iron core 5 is provided with a second protrusion 16, and the pressure relief port 7 is located on the top surface of the second protrusion 16. The protrusion 16 protrudes, so that the mating surface of the pressure relief port 7 forms a relatively independent area, ensuring a good contact with the moving iron core 6 and helping to improve the sealing performance during sealing. During operation, the upper end face of the moving iron core 6 will be tightly fitted with the edge of the pressure relief port 7 on the top surface of the second protrusion 16, effectively preventing gas or liquid from leaking from the pressure relief port 7. Compared with the upper end face of the moving iron core 6 being fitted and sealed with the entire flat lower end face of the stationary iron core 5, the machining difficulty of the upper end face of the second protrusion 16 fitting with the upper end face of the moving iron core 6 is smaller.

[0029] To improve the reliability of the sealing, such as Figure 9As shown, the moving iron core 6 is provided with a second rubber plug 17 for fitting with the pressure relief port 7; the moving iron core 6 is provided with a second mounting hole 18, and the second rubber plug 17 is located on the second mounting hole 18; the second mounting hole 18 is provided with a second through hole 19, which communicates with the valve cavity 9, and is located between the bottom of the second rubber plug 17 and the bottom of the second mounting hole 18; a support spring 20 is provided inside the second mounting hole 18, one end of the support spring 20 fitting with the second rubber plug 17, and the other end fitting with the bottom of the second mounting hole 18. The material of the second rubber plug 17 is nitrile rubber. The design of the second rubber plug 17 is both wear-resistant and elastic. When the moving iron core 6 moves upward, the contact between the second rubber plug 17 and the second boss 16 is a flexible contact, which can effectively compensate for minor errors that may occur during processing and assembly. It can fit more tightly with the edge of the pressure relief port 7 on the top surface of the second boss 16, further enhancing the sealing effect of the pressure relief port 7, thereby improving the reliability and durability of the seal. The setting of the second mounting hole 18 provides a stable mounting space for the second rubber plug 17 and the support spring 20, ensuring that they will not shift or fall off during the movement of the moving iron core 6. The design of the second through hole 19 allows gas or liquid in the valve chamber 9 to pass through. The action applied to the bottom of the second rubber plug 17 facilitates the reset of the second rubber plug 17 after it separates from the pressure relief port 7. It also ensures that the second mounting hole 18 is under high pressure when sealing the pressure relief port 7, thus guaranteeing the sealing effect of the second rubber plug 17. At the same time, when the second rubber plug 17 is under pressure, gas or liquid in the second mounting hole 18 can be discharged through the second through hole 19, ensuring the smooth contraction of the second rubber plug 17. The design of the support spring 20 provides elastic force assistance to the second rubber plug 17, prevents the second rubber plug 17 from retracting into the second mounting hole 18 and affecting the sealing effect, and also plays a buffering role to ensure the sealing stability of the second rubber plug 17.

[0030] In this embodiment, a limiting rod 45 is provided on the second rubber plug 17, and a through movable hole 46 is provided on the moving iron core 6. The two ends of the limiting rod 45 are provided on the movable hole 46. The diameter of the movable hole 46 is larger than the diameter of the limiting rod 45, so that the limiting rod 45 can move in the vertical direction of the movable hole 46, which also allows the second rubber plug 17 to move up and down relative to the moving iron core 6, facilitating the flexible contact of the second rubber plug 17; the second through hole 19 is located on the channel 13 to ensure that gas or liquid can enter stably.

[0031] To improve the reliability of the sealing, a first boss 21 is provided on the valve cavity 9, and the inlet 11 is located on the top surface of the first boss 21. The protrusion of the first boss 21 makes the mating surface of the inlet 11 form a relatively independent area, ensuring a close contact with the bottom surface of the valve cavity 9, which helps to improve the sealing performance during sealing. During operation, the lower end face of the moving iron core 6 will be tightly fitted with the edge of the inlet 11 on the top surface of the first boss 21, effectively preventing gas or liquid from leaking from the inlet 11. Compared with the lower end face of the moving iron core 6 being fitted and sealed with the entire flat bottom surface of the valve cavity 9, the machining difficulty of the top surface of the first boss 21 fitting with the lower end face of the moving iron core 6 is smaller.

[0032] To improve the reliability of the sealing, the moving iron core 6 is provided with a first rubber plug 22 for fitting with the inlet 11; the moving iron core 6 is provided with a first mounting hole 23, and the first rubber plug 22 is located in the first mounting hole 23; the first mounting hole 23 is provided with a first through hole 24, which communicates with the valve cavity 9, and is located between the bottom of the first rubber plug 22 and the first mounting hole 23. The first rubber plug 22 is made of nitrile rubber. The design of the first rubber plug 22 is both wear-resistant and has a certain degree of elasticity. When the moving iron core 6 moves downward, the contact between the first rubber plug 22 and the first boss 21 is a flexible contact, which can effectively compensate for minor errors that may occur during processing and assembly, and can fit more tightly with the edge of the inlet 11 on the top surface of the first boss 21, further enhancing the sealing effect of the inlet 11, thereby improving the reliability and durability of the seal; the setting of the first mounting hole 23 provides a stable installation space for the first rubber plug 22, ensuring that the moving iron core 6 moves through the valve cavity. The first through hole 24 is designed so that the gas or liquid in the valve chamber 9 can act on the bottom of the first rubber plug 22. This is beneficial for the first rubber plug 22 to be reset after it is separated from the inlet 11. It also ensures that the first mounting hole 23 is under high pressure when the inlet 11 is blocked, thus ensuring the sealing effect of the first rubber plug 22. At the same time, when the first rubber plug 22 is under pressure, the gas or liquid in the first mounting hole 23 can be discharged through the first through hole 24, ensuring the smooth contraction of the first rubber plug 22.

[0033] In this embodiment, a fixing groove 47 is provided on the first mounting hole 23, and a locking block 48 that cooperates with the fixing groove 47 is provided on the side of the first rubber plug 22, so that the first rubber plug 22 is firmly installed on the first mounting hole 23; the first through hole 24 is located on the channel 13 to ensure that gas or liquid can enter stably.

[0034] To ensure the structural reliability of the stationary iron core 5, the stationary iron core 5 includes an upper part 25 and a lower part 26. The pressure relief port 7 is located on the bottom surface of the upper part 25, and the moving iron core 6 is slidably installed on the lower part 26. The moving iron core 6 is provided with a groove 27, and a channel 13 is formed between the groove 27 and the lower part 26. The groove 27 extends from the bottom surface of the moving iron core 6 to the top surface of the moving iron core 6. In this embodiment, the upper part 25 and the lower part 26 are separate structures. The lower part 26 is fitted onto the upper part 25 and the two are connected by welding, which reduces the overall processing difficulty and improves production efficiency. Four grooves 27 are provided and are evenly distributed around the moving iron core 6, which has good ventilation performance and stable airflow. The pressure relief port 7 expands outward in a stepped shape from the bottom surface of the stationary iron core 5 to the top surface of the stationary iron core 5, which is more conducive to the outward flow of gas or liquid. The bottom of the lower part 26 is connected to the valve body 8 by threads, and the bottom diameter of the lower part 26 expands outward and fits with the sealing gasket 15. A second sealing element 49 is provided between the lower part 26 and the valve body 8. The second sealing element 49 adopts an O-ring.

[0035] To ensure reliable installation of the stationary iron core 5, the upper part 25 of the stationary iron core 5 is provided with a threaded section 30, which extends out of the housing 2. A locking nut 31 is fitted onto the threaded section 30, with its bottom surface fitting against the top surface of the housing 2. A first sealing element 32 is provided between the locking nut 31 and the housing 2 to improve the sealing effect. In this embodiment, the first sealing element 32 is an O-ring. Through the cooperation of the threaded section 30 and the locking nut 31, the stationary iron core 5 can be firmly installed on the housing 2; that is, the lower end of the stationary iron core 5 fits against the sealing gasket 15, and the upper end of the stationary iron core 5 is locked with the locking nut 31, thus achieving fixation.

[0036] To ensure the structural reliability of the housing 2, the housing 2 includes an outer shell 33 and an inner shell 34 located within the outer shell 33. The first coil 3 and the second coil 4 are located within the inner shell 34. The outer shell 33 also has a cable cavity 35 and a cable hole 36 communicating with the cable cavity 35. The inner shell 34 has a notch 37 communicating with the cable cavity 35. The bottom of the inner shell 34 is removable, facilitating the installation of the first coil 3 and the second coil 4 inside. The design of the outer shell 33 and the inner shell 34 provides better overall protection. The cable cavity 35 is used to install control components and wiring, the cable hole 36 is used for wire entry and exit, and the inner shell 34 can separate the coil part from the components, reducing mutual interference between them and improving the stability of use. The inner shell 34 is filled with glue, and the portion of the cable cavity 35 adjacent to the inner shell 34 is also filled with glue to improve insulation performance.

[0037] This locking solenoid valve employs an innovative bistable electromagnetic drive architecture. Its core consists of a set of integrated electromagnetic components, including a first coil 3, a second coil 4, and a magnet 14. By applying an extremely short (≥50ms) excitation pulse to a designated coil, the moving iron core 6 can be driven to switch to a stable open or closed position. After switching, thanks to the self-holding force generated by the magnet 14, the moving iron core 6 can be reliably locked in its end position even when completely de-energized, requiring no power maintenance. This locking solenoid valve solution aims to empower energy efficiency and reliability upgrades in critical systems. It utilizes advanced permanent magnet bistable technology, requiring only a 50ms instantaneous pulse to complete state switching and achieve zero-power permanent position locking. This disruptive operating mode brings two key advantages: First, it completely eliminates the standby power consumption and heat accumulation caused by continuous power supply in traditional solenoid valves, providing unprecedented energy-saving potential and lifespan assurance for battery-powered or energy-constrained applications; second, its power-off self-holding characteristic ensures that in the event of a system power interruption or failure, the actuator can be locked in the last safe state, greatly enhancing the system's inherent safety and disaster response capabilities.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A solenoid valve, characterized in that, include: Electromagnetic mechanism (1), the electromagnetic mechanism (1) includes housing (2), first coil (3), second coil (4), stationary iron core (5) and moving iron core (6), the first coil (3) and the second coil (4) are disposed inside the housing (2) and located outside the stationary iron core (5), the stationary iron core (5) and the moving iron core (6) are both mounted on the housing (2), the moving iron core (6) can move relative to the stationary iron core (5), and the stationary iron core (5) is provided with a pressure relief port (7); The valve body (8) is connected to the stationary iron core (5). The valve body (8) is provided with a valve cavity (9) and a working port (10) and an inlet (11) that connect the valve cavity (9). The reset spring (12) is disposed in the valve cavity (9), and the two ends of the reset spring (12) are respectively attached to the moving iron core (6) and the stationary iron core (5); A magnet (14) is provided between the first coil (3) and the second coil (4); the lower end of the moving iron core (6) is located in the valve cavity (9), and the moving iron core (6) is provided with a channel (13) connecting the valve cavity (9) and the pressure relief port (7); when the first coil (3) is energized, the moving iron core (6) blocks the pressure relief port (7), and the working port (10) is connected to the inlet (11); when the second coil (4) is energized, the moving iron core (6) blocks the inlet (11), and the working port (10) is connected to the pressure relief port (7).

2. The solenoid valve according to claim 1, characterized in that, A sealing gasket (15) is provided between the valve body (8) and the housing (2).

3. The solenoid valve according to claim 1, characterized in that, The stationary iron core (5) is provided with a second boss (16), and the pressure relief port (7) is located on the top surface of the second boss (16).

4. A solenoid valve according to claim 3, characterized in that, The moving iron core (6) is provided with a second rubber plug (17) for fitting with the pressure relief port (7); the moving iron core (6) is provided with a second mounting hole (18), and the second rubber plug (17) is located on the second mounting hole (18); the second mounting hole (18) is provided with a second through hole (19), which is connected to the valve cavity (9); a support spring (20) is provided in the second mounting hole (18), one end of the support spring (20) is fitted with the second rubber plug (17), and the other end is fitted with the bottom of the second mounting hole (18).

5. A solenoid valve according to claim 1, characterized in that, The valve chamber (9) is provided with a first boss (21), and the inlet (11) is located on the top surface of the first boss (21).

6. A solenoid valve according to claim 5, characterized in that, The moving iron core (6) is provided with a first rubber plug (22) for fitting with the inlet (11); the moving iron core (6) is provided with a first mounting hole (23), and the first rubber plug (22) is located on the first mounting hole (23); the first mounting hole (23) is provided with a first through hole (24), and the first through hole (24) communicates with the valve cavity (9).

7. A solenoid valve according to claim 1, characterized in that, The stationary iron core (5) includes an upper part (25) and a lower part (26). The pressure relief port (7) is located in the upper part (25), and the moving iron core (6) is slidably installed on the lower part (26). The moving iron core (6) is provided with a groove (27), and a channel (13) is formed between the groove (27) and the lower part (26).

8. A solenoid valve according to claim 1, characterized in that, A first coil frame (28) is provided between the first coil (3) and the stationary iron core (5); a second coil frame (29) is provided between the second coil (4) and the stationary iron core (5).

9. A solenoid valve according to claim 1, characterized in that, The stationary iron core (5) is provided with a threaded section (30), which extends out of the housing (2). A locking nut (31) is provided on the threaded section (30), and the bottom surface of the locking nut (31) is in contact with the top surface of the housing (2). A first sealing element (32) is provided between the locking nut (31) and the housing (2).

10. A solenoid valve according to claim 1, characterized in that, The housing (2) includes an outer shell (33) and an inner shell (34) located inside the outer shell (33). The first coil (3) and the second coil (4) are located inside the inner shell (34). The outer shell (33) is also provided with a cable cavity (35) and a cable hole (36) communicating with the cable cavity (35). The inner shell (34) is provided with a notch (37) communicating with the cable cavity (35).

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