Magnetic coupling linkage type mechanical self-closing valve

Abstract

The invention relates to the technical field of self-closing valves, in particular to a magnetic coupling linkage type mechanical self-closing valve which comprises a valve body, an air inlet and an air outlet are formed in the side wall of the valve body, a fixing frame is fixedly arranged in the air inlet, a sliding rod is transversely arranged on the fixing frame in a sliding mode, and a valve block is fixedly arranged at the end, facing the exterior of the valve body, of the sliding rod. A fixed magnet is fixedly arranged at the end, facing the interior of the valve body, of the sliding rod. A shaft barrel is vertically and fixedly arranged at the bottom in the valve body, a deflection magnet is rotationally arranged at the top of the shaft barrel, the end, close to the fixed magnet, of the deflection magnet is a repelling pole, a movable rod penetrating through the interior and exterior of the valve body is vertically arranged at the top of the valve body in a sliding mode, and a leather film is connected between the inner wall of the valve body and the movable rod in a sealed mode. A through hole is formed in the deflection magnet, a limiting block is arranged on the side wall of the bottom of the movable rod, a limiting groove is vertically formed in the side wall of the through hole in a penetrating mode, and the limiting block is located in the limiting groove. The device has the advantages that the fuel gas passage is automatically cut off when the fuel gas pressure is too high or too low, and the fuel gas use safety is improved.

Description

Technical Field

[0001] This application relates to the field of self-closing valve technology, and in particular to a magnetically coupled mechanical self-closing valve. Background Technology

[0002] Gas has become an indispensable part of people's lives, but people do not have a comprehensive understanding of the safe use of gas, or even any awareness of safety precautions, which has led to unnecessary losses and accidents.

[0003] Due to varying environmental conditions, urban gas pressure regulating equipment is prone to high-pressure gas supply issues. During emergency repairs, the gas supply must be shut off first. If users fail to turn off the valves of their appliances or stoves in a timely manner or forget to do so, gas leaks and explosions can occur when gas is supplied again, endangering nearby people and public safety. Summary of the Invention

[0004] In order to automatically cut off the gas supply when the gas pressure is too high or too low, and to minimize the risk of gas leakage accidents caused by the user not closing the gas appliance valve when gas is supplied again, thereby improving the safety of gas use, this application provides a magnetically coupled mechanical self-closing valve.

[0005] The magnetically coupled mechanical self-closing valve provided in this application adopts the following technical solution: A magnetically coupled mechanical self-closing valve includes a valve body. An air inlet and an air outlet are provided on opposite side walls of the valve body. A fixed frame is fixedly installed inside the air inlet. A flow hole is formed through the fixed frame. A slide rod is laterally slidable on the fixed frame. A valve block is fixedly installed at the end of the slide rod facing outwards from the valve body. The valve block can abut against the fixed frame and block the flow hole. A fixed magnet is fixedly installed at the end of the slide rod facing inwards from the valve body. A shaft cylinder is vertically fixedly installed at the bottom of the valve body. A deflecting magnet with a vertical axis is rotatably installed at the top of the shaft cylinder. The deflecting magnet is positioned near the fixed magnet at one end. The valve body has a repulsive pole that repels the magnetic field of the fixed magnet, and an attractive pole that attracts the magnetic field of the fixed magnet. A vertically sliding rod is mounted on the top of the valve body, penetrating both the inside and outside of the valve body. A diaphragm is sealingly connected between the inner wall of the valve body and the moving rod. The air inlet and outlet are both located below the diaphragm. A through hole is vertically opened on the deflecting magnet for the moving rod to pass through. A limiting block is provided on the side wall at the bottom of the moving rod. A limiting groove is vertically opened on the side wall of the through hole. The limiting block is located within the limiting groove and abuts against the side wall of the limiting groove. The limiting block can detach from the limiting groove.

[0006] By adopting the above technical solution, under normal gas supply, the gas pressure is within the set range, the diaphragm is under balanced force, the moving rod is in a stable position, and the limiting block is located in the limiting groove and abuts against the side wall of the limiting groove. At this time, the repulsive pole of the deflecting magnet is stably facing the fixed magnet. Under the action of repulsion, the fixed magnet moves away from the deflecting magnet, and the sliding rod drives the valve block to separate from the fixed frame. The flow hole remains unobstructed, and the gas flows out from the inlet through the flow hole and the inside of the valve body to the outlet. When the gas pressure is too high, the gas pressure pushes the diaphragm upward, causing the moving rod to move upward. The limiting block moves upward with the moving rod until it detaches from the top of the limiting groove. At this time, the deflecting magnet loses its constraint, and the repulsive force acts in the opposite direction on the deflecting magnet, causing the deflecting magnet to no longer stably face the fixed magnet. Until the repulsive force disappears, the valve block abuts against the fixed frame and blocks the flow hole under the push of the gas flowing in the inlet, cutting off the gas passage. When the gas pressure is too low, the insufficient pressure causes the diaphragm to contract downwards, moving the actuator rod downwards. The limiting block moves with the actuator rod until it disengages from the bottom of the limiting groove. At this point, the deflecting magnet is no longer stably aligned with the fixed magnet, the repulsive force disappears, and the valve block abuts against the fixed bracket, blocking the flow orifice and cutting off the gas passage. In this way, the gas passage is automatically cut off when the gas pressure is too high or too low, minimizing the risk of gas leaks caused by users not closing the appliance valve when gas is supplied again, thus improving gas safety.

[0007] Preferably, a locking torsion spring is provided between the deflecting magnet and the shaft cylinder. One end of the locking torsion spring is fixedly connected to the deflecting magnet, and the other end of the locking torsion spring is fixedly connected to the shaft cylinder. The locking torsion spring drives the attraction pole of the deflecting magnet toward the fixed magnet.

[0008] By adopting the above technical solution, the locking torsion spring is in a torsional storage state under normal gas supply conditions. At this time, because the limiting block abuts against the side wall of the limiting groove, the deflecting magnet is restricted to the position where the repulsive pole faces the fixed magnet. The torque of the locking torsion spring cannot drive the deflecting magnet to rotate. When the gas pressure is too high or too low, causing the limiting block to disengage from the limiting groove, the restriction of the deflecting magnet is released. The locking torsion spring releases its torque and drives the deflecting magnet to rotate, so that the attracting pole faces the fixed magnet. Since the attracting pole and the fixed magnet are magnetically attracted, the attraction between the two will pull the slide rod to move into the valve body, further driving the valve block to abut tightly against the fixed frame, enhancing the sealing effect of the convection hole, and ensuring that the gas passage is reliably cut off.

[0009] Preferably, the moving rod has an adjustment cavity inside, and the side wall of the adjustment cavity has a first constraint groove and a second constraint groove. The limiting block is composed of a first moving block and a second moving block symmetrically arranged on both sides of the moving rod. Two limiting grooves are symmetrically opened on both sides of the through hole. The first moving block passes through the first constraint groove and can slide down along the first constraint groove. The first moving block extends into one of the limiting grooves and abuts against it. The second moving block passes through the second constraint groove and can slide up along the second constraint groove. The second moving block extends into the other limiting groove and abuts against it. The adjustment cavity is provided with an adjustment component for driving the first moving block and the second moving block to slide.

[0010] By adopting the above technical solution, when using the self-closing valve of this application, the vertical positions of the first and second moving blocks can be adjusted by adjusting the components to adjust the stroke required for the moving rod to move when the first and second moving blocks are completely disengaged from the limiting groove. Specifically, when the first moving block is adjusted downward relative to the moving rod, the stroke required for the moving rod to move the first moving block upward and disengage from the limiting groove increases, thereby increasing the required deformation of the diaphragm and raising the pressure at which the self-closing valve determines the gas pressure to be overpressured. When the second moving block is adjusted upward relative to the moving rod, the stroke required for the moving rod to move the second moving block downward and disengage from the limiting groove increases, thereby increasing the required deformation of the diaphragm to contract and lowering the pressure at which the self-closing valve determines the gas pressure to be underpressured, thus achieving the gas pressure determination range of this application.

[0011] Preferably, the adjustment assembly includes a first extension block, a second extension block, a first screw, and a second screw, wherein the first screw and the second screw are rotatably connected to the top of the moving rod; the first extension block is integrally formed on the first moving block and extends upward, and the bottom of the first screw extends into the adjustment cavity and is threadedly connected to the first extension block; the second extension block is integrally formed on the second moving block and extends upward, and the bottom of the second screw extends into the adjustment cavity and is threadedly connected to the second extension block.

[0012] By adopting the above technical solution, when it is necessary to adjust the judgment range of gas pressure, the first screw and the second screw can be rotated respectively. Since the first screw is threadedly connected to the first extension block, rotating the first screw will drive the first extension block to move the first moving block up and down along the first constraint groove, thereby changing the initial position of the first moving block in the constraint groove and realizing the adjustment of the overpressure judgment pressure. Similarly, when the second screw is rotated, the second screw is threadedly engaged with the second extension block, which will drive the second extension block to move the second moving block up and down along the second constraint groove, changing the initial position of the second moving block in the constraint groove and realizing the adjustment of the underpressure judgment pressure.

[0013] Preferably, the first movable block can abut against the bottom end of the first constraint groove, and the second movable block can abut against the top end of the second constraint groove. When the first movable block abuts against the bottom end of the first constraint groove and the second movable block abuts against the top end of the second constraint groove, the vertical distance between the upper surface of the first movable block and the lower surface of the second movable block is less than the vertical height of the constraint groove.

[0014] By adopting the above technical solution, when the first moving block abuts against the bottom of the first constraint groove and the second moving block abuts against the top of the second constraint groove, the vertical distance between the upper surface of the first moving block and the lower surface of the second moving block is less than the vertical height of the constraint groove. This eliminates the possibility that the first moving block and the second moving block will detach from the bottom and top of the constraint groove respectively, and prevents the deflection magnet from losing the constraint of the first moving block or the second moving block at the same time when the pressure is normal.

[0015] Preferably, the moving rod is arranged as a vertical cylinder, and the moving rod is rotatably and slidingly engaged with the top of the valve body. A knob is integrally formed on the outer wall of the top of the moving rod, and an installation ring is rotatably arranged in the middle of the moving rod. The installation ring is fixedly connected to the diaphragm, and a locking assembly for preventing the moving rod from rotating is also provided on the top of the valve body.

[0016] By adopting the above technical solution, when the self-closing valve cuts off the gas passage due to abnormal gas pressure, to restore gas supply, the knob can be turned to rotate the moving rod. Since the moving rod rotates and slides with the top of the valve body, its basic vertical sliding function is not affected during rotation. Applying an external force in the vertical direction to the moving rod causes the limiting block and limiting groove to re-engage. Then, as the moving rod rotates, the engagement of the limiting block and limiting groove drives the deflection magnet to rotate, causing the repulsive pole of the deflection magnet to face the fixed magnet again. At this point, under the repulsive force, the sliding rod causes the valve block to separate from the fixed frame, restoring the flow orifice to unobstructed flow. The locking assembly can prevent the moving rod from rotating after it is adjusted to the appropriate position, ensuring the stability of the moving rod in the circumferential direction under normal operating conditions.

[0017] Preferably, a telescopic rod is fixedly provided on the inner top wall of the valve body. The telescopic rod is parallel to the axis of the moving rod, and the telescopic end of the telescopic rod is fixedly connected to the mounting ring.

[0018] By adopting the above technical solution, the telescopic rod restricts the installation ring to slide only in the vertical direction, preventing the installation ring from rotating with the moving rod due to friction, and preventing the diaphragm from being worn by torsional tension.

[0019] Preferably, the locking assembly includes a locking seat, a guide rail, a thrust spring, and a locking body. The locking body is fixed to the side wall of the moving rod outside the valve body. The guide rail is fixed to the top of the valve body. The locking seat is slidably disposed within the guide rail and slides towards or away from the moving rod. The thrust spring is disposed within the guide rail, with one end of the thrust spring fixedly connected to the locking seat and the other end of the locking seat fixedly connected to the end wall of the guide rail. The thrust spring drives the locking seat to approach the moving rod. The locking seat has a rotation-blocking groove on the side facing the moving rod. The locking body can extend into the rotation-blocking groove and abut against the side wall of the rotation-blocking groove. The locking body can slide vertically within the rotation-blocking groove.

[0020] By adopting the above technical solution, under normal operating conditions, the locking seat is pushed close to the moving rod by the force of the thrust spring. At this time, the locking body extends into the anti-rotation groove, and the side wall of the anti-rotation groove abuts against the locking body, preventing the moving rod from rotating around its own axis, ensuring the stability of the moving rod in the circumferential direction, and thus ensuring the relative position stability of the deflecting magnet and the fixed magnet. When it is necessary to rotate the moving rod for a reset operation, the locking seat is pushed to overcome the force of the thrust spring and move away from the moving rod. The locking body disengages from the limiting groove, and the moving rod can then rotate freely.

[0021] Preferably, the two side walls of the locking body are provided with balls, which can abut against the side wall of the rotation-blocking groove and roll on the side wall of the rotation-blocking groove.

[0022] By adopting the above technical solution, when the moving rod slides vertically due to changes in gas pressure, the locking body moves vertically synchronously with the moving rod. At this time, the ball abuts against the side wall of the anti-rotation groove and rolls, converting the sliding friction between the locking body and the anti-rotation groove into rolling friction, which significantly reduces the friction and wear between the two.

[0023] Preferably, a set of locking bodies are symmetrically arranged on the side wall of the moving rod. Any one of the locking bodies extends into the anti-rotation groove. The locking seat has inclined surfaces on both sides near the moving rod. The end of the locking body can abut against the inclined surface and push the locking seat away from the moving rod.

[0024] By adopting the above technical solution, when a reset operation is required by rotating the moving rod, there is no need to manually push the locking seat; simply rotate the moving rod directly. When the moving rod rotates, it drives the locking body to rotate synchronously. The end of the locking body abuts against the inclined surface of the locking seat. As the rotation angle increases, the locking body slides along the inclined surface and applies a thrust to the locking seat, causing the locking seat to overcome the elastic force of the thrust spring and move away from the moving rod. The locking body automatically enters the anti-rotation groove.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a fixed frame, flow hole, slide rod, valve block, fixed magnet, shaft cylinder, deflecting magnet, repulsive pole, attractive pole, moving rod, through hole, limiting block, limiting groove, and locking torsion spring, when the gas pressure is too high or too low, the diaphragm drives the moving rod to move, causing the limiting block to disengage from the limiting groove. The deflecting magnet rotates under the action of magnetic force and locking torsion spring, losing the repulsive force constraint on the fixed magnet. The valve block blocks the flow hole under the push of gas and magnetic attraction, automatically cutting off the gas passage. 2. By setting up an adjustment chamber, a first constraint groove, a second constraint groove, a first moving block, a second moving block, a first extension block, a second extension block, a first screw, and a second screw, the initial positions of the first and second moving blocks can be adjusted by rotating the screw, changing the stroke required for the moving rod to drive the limiting block away from the limiting groove, thereby adjusting the self-closing valve's judgment threshold for excessively high and low gas pressure, so that the self-closing valve can adapt to the pressure requirements of different scenarios and improve its applicability. 3. By incorporating a knob, mounting ring, telescopic rod, locking seat, guide rail, thrust spring, locking body, anti-rotation groove, ball bearings, and inclined surface, the knob and moving rod are designed to facilitate rotation and reset after troubleshooting, allowing the deflection magnet to return to its initial position and restoring air supply. Under the action of the thrust spring, the locking assembly restricts the rotation of the moving rod through the locking body and anti-rotation groove, ensuring operational stability, simplifying the reset operation, and improving ease of use and component durability. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a magnetically coupled mechanical self-closing valve provided in the embodiments of this application.

[0027] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0028] Figure 3 This is a cross-sectional structural diagram of a magnetically coupled mechanical self-closing valve provided in the embodiments of this application.

[0029] Figure 4 yes Figure 3 Enlarged view of section B.

[0030] Figure 5 yes Figure 3 Enlarged view of section C.

[0031] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Air inlet; 111. Fixing bracket; 112. Flow hole; 113. Slide rod; 114. Valve block; 115. Fixing magnet; 12. Air outlet; 13. Shaft cylinder; 14. Deflecting magnet; 141. Repulsive pole; 142. Attractive pole; 143. Through hole; 144. Restricting groove; 15. Locking torsion spring; 2. Moving rod; 21. Adjusting chamber; 211. First constraint groove; 212. Second constraint groove; 22. Limiting... 221. First moving block; 222. Second moving block; 23. Adjustment assembly; 231. First extension block; 232. Second extension block; 233. First screw; 234. Second screw; 24. Knob; 25. Mounting ring; 251. Diaphragm; 26. Telescopic rod; 3. Locking assembly; 31. Locking seat; 311. Rotation stop groove; 312. Inclined surface; 32. Guide rail; 33. Thrust spring; 34. Locking body; 341. Ball bearing. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0033] This application discloses a magnetically coupled mechanical self-closing valve. (Refer to...) Figure 1 and Figure 3 The valve body 1 includes a valve body 1 that forms an internal gas flow space. On opposite side walls of the valve body 1 are air inlets 11 and outlets 12, connecting the interior of the valve body 1. Gas enters the valve body 1 through the air inlets 11 and flows out through the outlets 12. A fixed bracket 111 is fixedly installed inside the air inlet 11. The fixed bracket 111 has several flow holes 112 penetrating the side walls, allowing gas to enter the valve body 1 from the outside through the flow holes 112. A sliding rod 113 is laterally slidable on the fixed bracket 111. A valve block 114, made of rubber, is fixedly installed at the end of the sliding rod 113 facing the outside of the valve body 1. The valve block 114 abuts against the fixed bracket 111 and blocks the flow holes 112.

[0034] Reference Figure 3 and Figure 4A fixed magnet 115 is fixedly installed at the end of the slide rod 113 facing the interior of the valve body 1. The fixed magnet 115 is located inside the valve body 1. A shaft cylinder 13 is vertically welded and fixedly installed at the bottom of the valve body 1. A deflecting magnet 14 with a vertical axis is rotatably installed on the outer wall of the top of the shaft cylinder 13 via a bearing. The end of the deflecting magnet 14 near the fixed magnet 115 is a repulsive pole 141, which repels the magnetism of the fixed magnet 115. The end of the deflecting magnet 14 away from the fixed magnet 115 is an attractive pole 142, which attracts the magnetism of the fixed magnet 115. A locking torsion spring 15 is provided between the deflecting magnet 14 and the shaft cylinder 13. One end of the locking torsion spring 15 is fixedly connected to the deflecting magnet 14, and the other end of the locking torsion spring 15 is fixedly connected to the shaft cylinder 13. The locking torsion spring 15 drives the attractive pole 142 of the deflecting magnet 14 toward the fixed magnet 115.

[0035] Reference Figure 3 and Figure 4 A vertically sliding rod 2 is mounted on the top of the valve body 1, penetrating both the inside and outside of the valve body 1. A diaphragm 251 is sealingly connected between the inner wall of the valve body 1 and the moving rod 2. The air inlet 11 and the air outlet 12 are both located below the diaphragm 251. A vertically penetrating through hole 143 is provided on the deflecting magnet 14 for the moving rod 2 to pass through. A limiting block 22 is provided on the side wall at the bottom of the moving rod 2, and a limiting groove 144 is vertically penetrating on the side wall of the through hole 143. The limiting block 22 is located in the limiting groove 144 and abuts against the side wall of the limiting groove 144, thereby hindering the rotation of the deflecting magnet 14. The limiting block 22 can detach from the top or bottom of the limiting groove 144.

[0036] During normal gas supply, the repulsive pole 141 of the deflecting magnet 14 faces the fixed magnet 115, and the fixed magnet 115 moves away from the deflecting magnet 14. The slide rod 113 drives the valve block 114 to separate from the fixed frame 111, and the flow hole 112 remains unobstructed. Gas flows out from the inlet 11 through the flow hole 112 and the inside of the valve body 1, exiting from the outlet 12. When the gas pressure is too high, the gas pressure pushes the diaphragm 251 to bulge upward, causing the moving rod 2 to move upward. The limiting block 22 moves upward with the moving rod 2 until it disengages from the top of the limiting groove 144. At this time, the deflecting magnet 14 loses its constraint. Under the action of the locking torsion spring 15, the attractive pole 142 of the deflecting magnet 14 faces the fixed magnet 115, and the valve block 114 abuts against the fixed frame 111 and blocks the flow hole 112, cutting off the gas passage. When the gas pressure is too low, the insufficient gas pressure causes the diaphragm 251 to contract downward, which drives the moving rod 2 to move downward. The limiting block 22 moves downward with the moving rod 2 until it disengages from the bottom of the limiting groove 144. At this time, the deflecting magnet 14 is no longer stably facing the fixed magnet 115, thus cutting off the gas passage.

[0037] To facilitate setting the underpressure and overpressure values ​​of the self-closing valve, refer to... Figures 3 to 5The movable rod 2 has an adjustment cavity 21 inside, which is a vertically oriented cylindrical cavity. A first constraint groove 211 and a second constraint groove 212 are formed on the side wall at the bottom of the adjustment cavity 21. The limiting block 22 is composed of a first movable block 221 and a second movable block 222 symmetrically arranged on both sides of the movable rod 2. Two limiting grooves 144 are symmetrically formed on both sides of the through hole 143. The first movable block 221 passes through the first constraint groove 211 and can slide downwards along it, extending into one of the limiting grooves 144 and abutting against it. The second movable block 222 passes through the second constraint groove 212 and can slide upwards along it, extending into the other limiting groove 144 and abutting against it.

[0038] Reference Figures 3 to 5 An adjustment assembly 23 is provided within the adjustment cavity 21 to drive the first moving block 221 and the second moving block 222 to slide. Specifically, the adjustment assembly 23 includes a first extension block 231, a second extension block 232, a first screw 233, and a second screw 234. Both the first screw 233 and the second screw 234 are rotatably connected to the top of the moving rod 2, and each of the first screw 233 and the second screw 234 has a hexagonal hole at its top for a hexagonal screwdriver to insert into. The first extension block 231 is integrally formed on the first moving block 221 and extends upwards. The bottom of the first screw 233 extends into the adjustment cavity 21 and is threadedly connected to the first extension block 231. The second extension block 232 is integrally formed on the second moving block 222 and extends upwards. The bottom of the second screw 234 extends into the adjustment cavity 21 and is threadedly connected to the second extension block 232. In addition, the first movable block 221 can abut against the bottom end of the first constraint groove 211, and the second movable block 222 can abut against the top end of the second constraint groove 212. When the first movable block 221 abuts against the bottom end of the first constraint groove 211 and the second movable block 222 abuts against the top end of the second constraint groove 212, the vertical distance between the upper surface of the first movable block 221 and the lower surface of the second movable block 222 is less than the vertical height of the limiting groove 144. The first extension block 231 and the second extension block 232 are both semi-cylindrical. The first extension block 231 and the second extension block 232 abut against each other and jointly seal the top and bottom of the adjusting cavity 21.

[0039] Reference Figures 3 to 5When using the self-closing valve, the position of the first moving block 221 in the vertical direction is adjusted by rotating the first screw 233. When the first moving block 221 is adjusted downward relative to the moving rod 2, the stroke required for the moving rod 2 to move the first moving block 221 upward and disengage from the limiting groove 144 increases, thereby increasing the required deformation of the diaphragm 251, and the self-closing valve determines that the gas pressure is overpressured by increasing the pressure. When the second moving block 222 is adjusted upward relative to the moving rod 2, the stroke required for the moving rod 2 to move the second moving block 222 downward and disengage from the limiting groove 144 increases, thereby increasing the required deformation of the diaphragm 251 to contract, and the self-closing valve determines that the gas pressure is underpressured by decreasing the pressure.

[0040] To facilitate manual reset of the self-closing valve, refer to Figure 2 and Figure 3 The moving rod 2 is a vertically oriented cylinder. The moving rod 2 rotates and slides with the top of the valve body 1. A knob 24 is integrally formed on the outer wall of the top of the moving rod 2. A mounting ring 25 is rotatably mounted in the middle of the moving rod 2, and the mounting ring 25 is fixedly connected to the diaphragm 251. Several telescopic rods 26 are fixedly mounted on the inner top wall of the valve body 1. The telescopic rods 26 are parallel to the axis of the moving rod 2, and the telescopic ends of the telescopic rods 26 are fixedly connected to the mounting rings 25.

[0041] Reference Figure 2 and Figure 5 The valve body 1 is also equipped with a locking assembly 3 at its top to prevent the rotation of the moving rod 2. The locking assembly 3 includes a locking seat 31, a guide rail 32, a thrust spring 33, and a locking body 34. Two locking bodies 34 are symmetrically and fixedly arranged on the side wall of the moving rod 2. The guide rail 32 is fixed to the top of the valve body 1, and the locking seat 31 is slidably disposed within the guide rail 32, and the locking seat 31 slides in the direction of approaching or moving away from the moving rod 2. The thrust spring 33 is disposed within the guide rail 32, one end of the thrust spring 33 is fixedly connected to the locking seat 31, and the other end of the locking seat 31 is fixedly connected to the end wall of the guide rail 32. The thrust spring 33 drives the locking seat 31 to approach the moving rod 2. The locking seat 31 has a rotation-blocking groove 311 on the side facing the moving rod 2, and any locking body 34 extends into the rotation-blocking groove 311 and abuts against the side wall of the rotation-blocking groove 311. The locking seat 31 has inclined surfaces 312 on both sides near the moving rod 2. The end of the locking body 34 can abut against the inclined surfaces 312 and push the locking seat 31 away from the moving rod 2. The locking body 34 can slide vertically within the anti-rotation groove 311. Specifically, rotatable balls 341 are embedded on both side walls of the locking body 34. The balls 341 can abut against the side walls of the anti-rotation groove 311 and roll on the side walls of the anti-rotation groove 311.

[0042] Reference Figure 2 and Figure 5When the self-closing valve automatically disconnects, the attraction pole 142 of the deflecting magnet 14 faces the fixed magnet 115. At this time, the deflecting magnet 14 deflects half a turn relative to the normal operating state, while the moving rod 2 does not rotate under the constraint of the rotation groove 311 and the locking body 34. Pulling the moving rod 2 vertically causes the first moving block 221 and the second moving block 222 to enter the constraint groove, and then pushes the locking seat 31 away from the moving rod 2, allowing the moving rod 2 to rotate freely. After rotating the moving rod 2 slightly, the locking seat 31 is released, and the moving rod 2 is rotated again until the moving rod 2 also rotates half a turn. When the other locking body 34 approaches the locking seat 31, the end of the other locking body 34 abuts against the inclined surface 312 of the locking seat 31. As the rotation angle increases, the locking body 34 slides along the inclined surface 312 and applies a pushing force to the locking seat 31, causing the locking seat 31 to overcome the elastic force of the thrust spring 33 and move away from the moving rod 2. The locking body 34 automatically enters the anti-rotation groove 311. At this time, with the cooperation of the first moving block 221, the second moving block 222 and the constraint groove, the moving rod 2 drives the deflection magnet 14 to rotate half a turn. The deflection magnet 14 repels the fixed magnet 115, the air inlet 11 opens, and after the gas in the valve body 1 is stabilized, the knob 24 is released to complete the reset of the self-closing valve.

[0043] The implementation principle of a magnetically coupled mechanical self-closing valve according to an embodiment of this application is as follows: During normal gas supply, the repulsive pole 141 of the deflecting magnet 14 faces the fixed magnet 115, and the fixed magnet 115 moves away from the deflecting magnet 14. The slide rod 113 drives the valve block 114 to separate from the fixed frame 111, and the flow hole 112 remains unobstructed. Gas flows out from the inlet 11 through the flow hole 112 and the inside of the valve body 1 through the outlet 12. When the gas pressure is too high, the gas pressure pushes the diaphragm 251 to bulge upward, driving the moving rod 2 to move upward. The limiting block 22 moves upward with the moving rod 2 until it disengages from the top of the limiting groove 144. At this time, the deflecting magnet 14 loses its constraint. Under the action of the locking torsion spring 15, the attractive pole 142 of the deflecting magnet 14 faces the fixed magnet 115, and the valve block 114 abuts against the fixed frame 111 and blocks the flow hole 112, cutting off the gas passage. When the gas pressure is too low, the insufficient gas pressure causes the diaphragm 251 to contract downwards, moving the actuator 2 downwards. The limiting block 22 moves downwards with the actuator 2 until it disengages from the bottom of the limiting groove 144. At this time, the deflecting magnet 14 is no longer stably aligned with the fixed magnet 115, cutting off the gas passage. In this way, the gas passage is automatically cut off when the gas pressure is too high or too low, minimizing the risk of gas leaks caused by the user not closing the appliance valve when gas is supplied again, thus improving gas safety.

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

Claims

1. A magnetically coupled mechanical self-closing valve, comprising a valve body (1), wherein an air inlet (11) and an air outlet (12) are provided on opposite side walls of the valve body (1), characterized in that: A fixed bracket (111) is fixedly installed inside the air inlet (11). A flow hole (112) is opened through the fixed bracket (111). A slide rod (113) is slidably installed on the fixed bracket (111). A valve block (114) is fixedly installed at the end of the slide rod (113) facing the outside of the valve body (1). The valve block (114) can abut against the fixed bracket (111) and block the flow hole (112). A fixed magnet (115) is fixedly installed at the end of the slide rod (113) facing the inside of the valve body (1). A shaft cylinder (13) is vertically and fixedly installed at the bottom inside the valve body (1). A deflecting magnet (14) with a vertical axis is rotatably installed at the top of the shaft cylinder (13). The end of the deflecting magnet (14) near the fixed magnet (115) is a repulsive pole (141). The repulsive pole (141) and the fixed magnet (115) are magnetically opposed. The end facing away from the fixed magnet (115) is the attracting pole (142), and the attracting pole (142) is magnetically attracted to the fixed magnet (115); a moving rod (2) is vertically slidably disposed on the top of the valve body (1) and penetrates the inside and outside of the valve body (1); a diaphragm (251) is sealed between the inner wall of the valve body (1) and the moving rod (2); the air inlet (11) and the air outlet (12) are both located below the diaphragm (251). The deflecting magnet (14) has a through hole (143) through which the moving rod (2) passes. A limiting block (22) is provided on the side wall at the bottom of the moving rod (2). A limiting groove (144) is provided on the side wall of the through hole (143). The limiting block (22) is located in the limiting groove (144) and abuts against the side wall of the limiting groove (144). The limiting block (22) can be disengaged from the limiting groove (144).

2. The magnetically coupled mechanical self-closing valve according to claim 1, characterized in that: A locking torsion spring (15) is provided between the deflecting magnet (14) and the shaft cylinder (13). One end of the locking torsion spring (15) is fixedly connected to the deflecting magnet (14), and the other end of the locking torsion spring (15) is fixedly connected to the shaft cylinder (13). The locking torsion spring (15) drives the attraction pole (142) of the deflecting magnet (14) towards the fixed magnet (115).

3. The magnetically coupled mechanical self-closing valve according to claim 1, characterized in that: The moving rod (2) has an adjustment cavity (21) inside. The side wall of the adjustment cavity (21) has a first constraint groove (211) and a second constraint groove (212). The limiting block (22) is composed of a first moving block (221) and a second moving block (222) symmetrically arranged on both sides of the moving rod (2). The limiting groove (144) has two symmetrically arranged on both sides of the through hole (143). The first moving block (221) passes through the first constraint groove (211) and can move along... The first constraint groove (211) slides downward, the first moving block (221) extends into one of the limiting grooves (144) and abuts against it, the second moving block (222) passes through the second constraint groove (212) and can slide upward along the second constraint groove (212), the second moving block (222) extends into another limiting groove (144) and abuts against it, and the adjustment cavity (21) is provided with an adjustment component (23) for driving the first moving block (221) and the second moving block (222) to slide.

4. The magnetically coupled mechanical self-closing valve according to claim 3, characterized in that: The adjustment assembly (23) includes a first extension block (231), a second extension block (232), a first screw (233), and a second screw (234). The first screw (233) and the second screw (234) are rotatably connected to the top of the moving rod (2). The first extension block (231) is integrally formed on the first moving block (221) and extends upward. The bottom of the first screw (233) extends into the adjustment cavity (21) and is threadedly connected to the first extension block (231). The second extension block (232) is integrally formed on the second moving block (222) and extends upward. The bottom of the second screw (234) extends into the adjustment cavity (21) and is threadedly connected to the second extension block (232).

5. A magnetically coupled mechanical self-closing valve according to claim 3, characterized in that: The first moving block (221) can abut against the bottom end of the first constraint groove (211), and the second moving block (222) can abut against the top end of the second constraint groove (212). When the first moving block (221) abuts against the bottom end of the first constraint groove (211) and the second moving block (222) abuts against the top end of the second constraint groove (212), the vertical distance between the upper surface of the first moving block (221) and the lower surface of the second moving block (222) is less than the vertical height of the constraint groove (144).

6. The magnetically coupled mechanical self-closing valve according to claim 1, characterized in that: The moving rod (2) is arranged in the shape of a vertical cylinder. The moving rod (2) rotates and slides with the top of the valve body (1). A knob (24) is integrally formed on the outer wall of the top of the moving rod (2). An installation ring (25) is rotatably arranged in the middle of the moving rod (2). The installation ring (25) is fixedly connected to the diaphragm (251). The top of the valve body (1) is also provided with a locking assembly (3) to prevent the moving rod (2) from rotating.

7. A magnetically coupled mechanical self-closing valve according to claim 6, characterized in that: A telescopic rod (26) is fixedly installed on the inner top wall of the valve body (1). The telescopic rod (26) is parallel to the axis of the moving rod (2). The telescopic end of the telescopic rod (26) is fixedly connected to the mounting ring (25).

8. A magnetically coupled mechanical self-closing valve according to claim 6, characterized in that: The locking assembly (3) includes a locking seat (31), a guide rail (32), a thrust spring (33), and a locking body (34). The locking body (34) is fixed to the side wall of the moving rod (2) outside the valve body (1). The guide rail (32) is fixed to the top of the valve body (1). The locking seat (31) is slidably disposed within the guide rail (32), and the locking seat (31) slides in a direction close to or away from the moving rod (2). The thrust spring (33) is disposed within the guide rail (32). One end of (33) is fixedly connected to the locking seat (31), and the other end of the locking seat (31) is fixedly connected to the end wall of the guide rail (32). The thrust spring (33) drives the locking seat (31) to approach the moving rod (2). The locking seat (31) has a stop groove (311) on the side facing the moving rod (2). The locking body (34) can extend into the stop groove (311) and abut against the side wall of the stop groove (311). The locking body (34) can slide vertically in the stop groove (311).

9. A magnetically coupled mechanical self-closing valve according to claim 8, characterized in that: The locking body (34) has ball bearings (341) embedded on both sides of its side wall. The ball bearings (341) can abut against the side wall of the rotation-blocking groove (311) and can roll on the side wall of the rotation-blocking groove (311).

10. A magnetically coupled mechanical self-closing valve according to claim 8, characterized in that: A set of locking bodies (34) are symmetrically arranged on the side wall of the moving rod (2). Any one of the locking bodies (34) extends into the anti-rotation groove (311). The locking seat (31) has inclined surfaces (312) on both sides near the moving rod (2). The end of the locking body (34) can abut against the inclined surface (312) and push the locking seat (31) away from the moving rod (2).

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