A leak-proof gas pipeline self-closing valve

Abstract

This invention discloses a leak-proof self-closing valve for gas pipelines in the field of gas safety device technology. The valve includes a main body, and further includes: a guide sleeve fixed within the main body, an elastic drive component located at the bottom of a valve stem, and a drive rod inserted into one end of the guide sleeve. One end of the drive rod passes through a vent and is connected to a sealing plug, while the other end is connected to a movable block slidably connected to the inner wall of the guide sleeve. A driven magnetic block is eccentrically embedded on the movable block. A rotating disk is rotatably mounted inside the guide sleeve, and two drive magnetic blocks with opposite magnetic poles are eccentrically embedded on the rotating disk. The rotating disk is drively connected to the elastic drive component. This invention uses the valve stem, valve stem, and elastic drive component to rotate the rotating disk. The magnetic force between the drive magnetic blocks and the driven magnetic block on the rotating disk drives the drive rod to move the sealing plug, improving the reliability and service life of the valve.

Description

Technical Field

[0001] This invention relates to the field of gas safety devices, and more specifically to a self-closing valve for leak-proof gas pipelines. Background Technology

[0002] Scene technology In order to improve safety during gas transmission, gas self-closing valves need to be installed on gas pipelines. When the gas supply pressure in the pipeline is low or high, the gas pipeline can be automatically shut off without electricity or other external power and can only be manually opened. This plays a good role in ensuring the safety of gas use.

[0003] For example, CN115949790B discloses a leak-proof self-closing valve for gas pipelines. This valve includes: a body, which is the outer shell of the self-closing valve, including a top valve cover and an internal valve stem; an outlet pipe installed on the body and connected to the gas pipeline; an inlet pipe installed on the body, connected to the gas pipeline, and symmetrical to the outlet pipe; a first valve stem inserted into the body; and an elastic diaphragm located within the body, with a frame around its edge. While this valve can consistently isolate the switching spring from the gas through an isolation cylinder, preventing the switching spring from being impacted and corroded by the gas and improving its service life, it has the following drawbacks in practical use: The opening and closing of the aforementioned valves still rely on a switching spring. Under long-term compression and tension, the switching spring inevitably faces the risk of fatigue decay, unstable elastic force, or even breakage, affecting the reliability and service life of the valve. Furthermore, since the switching spring is located inside the valve body, replacement due to these risks requires disassembling the valve body and removing the spring from within, resulting in high maintenance difficulty and cost. Therefore, we propose a leak-proof self-closing valve for gas pipelines. Summary of the Invention

[0004] The purpose of this invention is to provide a leak-proof gas pipeline self-closing valve, which solves the technical problems mentioned in the background art.

[0005] The present invention achieves the above objectives through the following technical solutions: A leak-proof gas pipeline self-closing valve includes a main body, an inlet pipe and an outlet pipe respectively disposed on both sides of the main body, a valve stem 1 inserted into the main body, an elastic diaphragm disposed inside the main body and connected to the valve stem 1, a valve stem 2 located below the valve stem 1 and magnetically connected to the valve stem 1, a partition disposed inside the outlet pipe, and a vent hole opened on the partition; the valve further includes: a guide sleeve fixed inside the main body, an elastic drive component disposed at the bottom of the valve stem 2 for driving the valve stem 2 to return to its original position downward, and a drive rod inserted at one end of the guide sleeve, one end of the drive rod passing through the vent hole and connected to a sealing plug for closing the vent hole, and the other end connected to a movable block slidably connected to the inner wall of the guide sleeve, a driven magnetic block eccentrically embedded on the movable block, a rotating disk rotatably disposed inside the guide sleeve, a drive magnetic block 1 and a drive magnetic block 2 with opposite magnetic poles eccentrically embedded on the rotating disk, the drive magnetic block 2 and the driven magnetic block having the same magnetic pole, and the rotating disk being drively connected to the elastic drive component; When the valve stem 2 moves upward to a preset position, the elastic drive component drives the rotating disk to rotate by a preset angle so that the driving magnetic block 2 corresponds to the driven magnetic block. When the valve stem 2 moves downward to reset, the elastic drive component drives the rotating disk to reset so that the driving magnetic block 1 corresponds to the driven magnetic block.

[0006] A further improvement is that the elastic drive component includes a movable frame located at the bottom of the valve stem, a rack located on one side of the movable frame, a gear meshing with and connecting to the rotating disk, and an extension rod located at the bottom of the movable frame. The bottom of the extension rod movably passes through the main body and extends into the outer sleeve. The outer sleeve is detachably fixed to the bottom of the main body. A movable plate detachably fixed to the extension rod is slidably disposed inside the outer sleeve. The movable plate is connected to the inner wall of the outer sleeve by a connecting spring.

[0007] A further improvement is that the movable plate is connected to the connecting plate via a connecting spring, the connecting plate is slidably disposed inside the outer sleeve and located below the movable plate, and an adjusting screw is threaded through the connecting plate, the adjusting screw being rotatably inserted into the bottom end of the outer sleeve.

[0008] A further improvement is that a baffle is fitted on the inner wall of the guide sleeve on the side of the rotating disk facing the movable block. The baffle is used to block the driving magnetic block one or the driving magnetic block two when they correspond to the driven magnetic block.

[0009] A further improvement is that the guide sleeve is provided with a locking element for locking the movable block, and the locking element is connected to a driving element, which is located on the gear element. The driving component is used to drive the locking component to release the locking state of the movable block when the valve stem moves upward to a preset position.

[0010] A further improvement is that the driving component includes a follower wheel fixedly sleeved on the outer wall of the gear component and located outside the guide sleeve. An arc-shaped magnetic ring is embedded on the follower wheel. A magnetic rod is slidably provided on the guide sleeve and located outside the follower wheel. The magnetic rod is connected to a locking component by a pull rope. The locking component includes a mounting cylinder fixedly inserted into the guide sleeve. A limiting post is movably inserted into one end of the mounting cylinder. The limiting post is configured to abut against the side of the movable block near the drive rod when the driving magnetic block and the driven magnetic block correspond. The limiting post is connected to the inner wall of the mounting cylinder through an elastic element and is connected to a pull rope. The arc-shaped magnetic ring is used to attract the magnetic rod to move when the valve stem moves upward, and the pull rope pulls the limiting post into the mounting cylinder when the magnetic rod moves.

[0011] A further improvement is that a movable groove communicating with the inner cavity of the mounting cylinder is opened in the wall of the guide sleeve on one side of the mounting cylinder. A movable slide is slidably arranged in the movable groove. One end of the movable slide is connected to the inner wall of the bottom of the movable groove through an elastic element, and the other end is provided with a locking rod. An arc-shaped locking groove for the locking rod to be inserted is opened on the outer wall of the limiting post. The movable slide extends into the guide sleeve and is driven to move by the movable block. After the limiting post enters the mounting cylinder, the locking rod is engaged in the arc-shaped slot to fix the limiting post. When the driving magnetic block 1 corresponds to the driven magnetic block, the movable slide is driven by the movable block to move the locking rod out of the arc-shaped slot.

[0012] A further improvement is that when the first driving magnetic block and the driven magnetic block correspond, the arc-shaped magnetic ring and the magnetic rod are in a staggered state; when the second driving magnetic block and the driven magnetic block correspond, the arc-shaped magnetic ring and the magnetic rod are in a corresponding state.

[0013] A further improvement is that the first driving magnetic block, the second driving magnetic block, and the driven magnetic block are all provided in two sets; wherein, the two sets of driven magnetic blocks are symmetrically and eccentrically embedded on the movable block, and the two sets of first driving magnetic blocks and the two sets of second driving magnetic blocks are symmetrically and eccentrically embedded on the rotating disk, and the two sets of first driving magnetic blocks and the two sets of second driving magnetic blocks are staggered.

[0014] A further improvement is that the outer circumferential wall of the movable block is embedded with several sets of balls, and the inner wall of the guide sleeve is provided with a ball groove that cooperates with the balls along its axis.

[0015] The beneficial effects of this invention are as follows: This invention uses valve stem one, valve stem two, and an elastic drive component to rotate the rotating disk. The magnetic force between the driving magnetic block one and driving magnetic block two on the rotating disk and the driven magnetic block drives the drive rod to move the sealing plug, which improves the reliability and service life of the valve operation. Furthermore, the connecting spring in the elastic drive component is located outside the main body. When the connecting spring needs to be replaced after long-term use, there is no need to disassemble the internal components of the valve body. Maintenance can be easily carried out by simply removing the outer sleeve, which reduces the difficulty and cost of maintenance. Secondly, by setting a linkage structure between the locking component and the driving component, the present invention can reliably lock the moving block when the sealing plug closes the vent, preventing the sealing plug from accidentally dislodging due to the internal gas pressure when the valve is closed, thus further enhancing the anti-leakage performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the valve structure of the present invention; Figure 2 For the present invention Figure 1 Another perspective structural diagram; Figure 3 This is a cross-sectional view of the valve structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of structure A in the image; Figure 5 This is a schematic diagram of the elastic drive component structure of the present invention; Figure 6 This is a schematic diagram of the rotating disk structure of the present invention.

[0017] In the diagram: 1. Main body; 2. Inlet pipe; 3. Outlet pipe; 4. Valve stem one; 5. Elastic diaphragm; 6. Valve stem two; 7. Movable frame; 8. Rack; 9. Guide sleeve; 10. Drive rod; 11. Sealing plug; 12. Vent hole; 13. Rotating disk; 14. Drive magnetic block one; 15. Movable block; 16. Driven magnetic block; 17. Baffle; 18. Outer sleeve; 19. Movable plate; 20. Connecting plate; 21. Connecting spring; 22. Adjusting screw; 23. Follower wheel; 24. Arc-shaped magnetic ring; 25. Magnetic rod; 26. Pull rope; 27. Mounting cylinder; 28. Limiting post; 29. ​​Movable slide plate; 30. Locking rod; 31. Elastic element one. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example 1

[0020] Please see the appendix Figure 1-4 A leak-proof gas pipeline self-closing valve includes a main body 1 (the main body 1 is the outer shell of the self-closing valve), an inlet pipe 2 and an outlet pipe 3 respectively located on both sides of the main body 1 (both are connected to the gas pipeline), a valve stem 4 inserted into the main body 1 (with a lifting knob on its top), an elastic diaphragm 5 located inside the main body 1 and connected to the valve stem 4 (with a frame on its edge, the frame being installed in the main body 1), a valve stem 6 located below the valve stem 4 and magnetically connected to the valve stem 4 (i.e., both valve stem 4 and valve stem 6 have magnets that attract each other at opposite ends), a partition plate located inside the outlet pipe 3, and a vent hole 12 opened on the partition plate; the above structure is a conventional structure in existing valves, for example, a leak-proof gas pipeline self-closing valve proposed in publication number: CN115949790B has been disclosed, and will not be described in detail here. The valve further includes: a guide sleeve 9 fixed inside the main body 1 and coaxial with the vent hole 12 (optionally, both ends of the guide sleeve 9 are closed, and it can be fixed to the inner cavity of the main body 1 by a bracket); an elastic drive component located at the bottom of the valve stem 6 for driving the valve stem 6 to return downward; and a drive rod 10 inserted at one end of the guide sleeve 9, the diameter of the drive rod 10 being smaller than the diameter of the vent hole 12, one end of the drive rod 10 passing through the vent hole 12 and connected to a sealing plug 11 for sealing the vent hole 12 (its diameter being larger than the diameter of the vent hole 12, the sealing plug 11 being close to...). A sealing ring can be embedded on one side of the partition plate, and the other end is connected to a movable block 15 that is slidably connected to the inner wall of the guide sleeve 9. A driven magnetic block 16 is eccentrically embedded on the movable block 15. A rotating disk 13 is rotatably provided inside the guide sleeve 9. The rotating disk 13 is coaxial with the movable block 15. A driving magnetic block 14 and a driving magnetic block 2 with opposite magnetic poles are eccentrically embedded on the rotating disk 13. For example, if the driving magnetic block 14 is the N pole, then the driving magnetic block 2 is the S pole. The driving magnetic block 2 and the driven magnetic block 16 have the same magnetic pole (e.g., both are S poles). The rotating disk 13 is connected to the elastic drive component for transmission. When the valve stem 26 moves upward to a preset position, the elastic drive component drives the rotating disk 13 to rotate by a preset angle, so that the driving magnetic block 2 aligns with the driven magnetic block 16. Since their magnetic poles are the same, when they align, the movable block 15 drives the drive rod 10 to make the sealing plug 11 leave the partition, thereby opening the vent 12, allowing the gas to flow normally. When the valve stem 26 moves downward to reset, the elastic drive component drives the rotating disk 13 to reset, so that the driving magnetic block 14 aligns with the driven magnetic block 16, as shown in the attached diagram. Figure 3 In the state shown, since the magnetic poles of the two are opposite, when the two are in correspondence, the movable block 15 drives the drive rod 10 to reset the sealing plug 11 to contact the partition, thereby closing the vent 12, and the gas cannot flow at this time. Specifically, during use, valve stem 4 is pulled upward by lifting the knob on valve stem 4. Valve stem 4 causes the elastic diaphragm 5 to bulge upward, forming an upward bulge. Since valve stem 4 and valve stem 42 are magnetically connected, under the action of magnetic force, valve stem 4 drives valve stem 6 to move upward. Valve stem 6 drives the rotating disk 13 to rotate at a preset angle through the elastic drive component, thereby making the drive magnetic block 2 correspond to the driven magnetic block 16, so that the sealing plug 11 leaves the partition. Therefore, air is allowed to pass through both sides of the partition. Then, the gas supply component of the gas pipeline is started, so that gas flows in the pipeline. Gas is injected through the inlet pipe 2 and flows to the outlet pipe 3 through the vent 12. Gas pressure exists in the main body 1. The gas pressure acts on the surface of the elastic diaphragm 5, so that the bulge remains after the valve stem 4 is pulled back. When gas leaks, the gas pressure inside the main body 1 decreases, the elastic diaphragm 5 resets, and the drive rod 10 drives the rotating disk 13 to reset and rotate to the initial state under the action of the elastic drive component, so that the drive magnetic block 14 corresponds to the driven magnetic block 16. The movable block 15 drives the drive rod 10 to reset the sealing plug 11 to contact the partition, thereby closing the vent 12. When the internal pressure of the main body 1 is too high, the elastic diaphragm 5 further bulges and deforms upward, causing the valve stem 4 to move away from the valve stem 6. This results in an increase in the distance between the magnets inside the valve stem 4 and the valve stem 6, and a decrease in magnetism until the magnetic connection between the two is broken. Then the valve stem 6 loses its magnetic force and resets downward under the action of the elastic drive component. The drive rod 10 also drives the sealing plug 11 to reset and move.

[0021] Please see the appendix Figure 3-5 Preferably, the elastic drive component of this embodiment includes a rectangular movable frame 7 located at the bottom of the valve stem 6, a rack 8 located on one side of the movable frame 7, a gear component (composed of a gear meshing with the rack 8 and a shaft connecting the gear and the rotating disk 13) meshing with and connecting the rack 8, and an extension rod located at the bottom of the movable frame 7 for attachment. Figure 5 In the state shown, in this embodiment, when valve stem 2 6 moves upward, movable frame 7 drives rack 8 upward, rack 8 drives gear component to rotate clockwise, thereby driving rotating disk 13 to rotate a preset angle; conversely, when valve stem 2 6 moves downward, rack 8 drives gear component to rotate counterclockwise, rotating disk 13 resets. The bottom of the extension rod moves through the main body 1 and extends into the outer sleeve 18. The connection between the extension rod and the main body 1, and the connection between the valve stem 4 and the main body 1, adopt the same sealing connection method. This sealing connection method is a conventional method in the field and will not be described in detail here. The outer sleeve 18 is detachably fixed to the bottom of the main body 1. For example, the outer sleeve 18 and the bottom of the main body 1 can be connected by a thread. A movable plate 19 that is detachably fixed to the bottom of the extension rod is slidably provided inside the outer sleeve 18. Optionally, in this embodiment, the movable plate 19 and the extension rod can be connected by a thread. The thread connection direction is the same as the thread connection direction of the outer sleeve 18 and the main body 1, so as to facilitate disassembly and maintenance. The movable plate 19 is connected to the inner wall of the outer sleeve 18 by a connecting spring 21. The connecting spring 21 in the aforementioned elastic drive component is located on the outside of the main body 1. If the connecting spring 21 needs to be replaced, the user does not need to disassemble the main body 1 to replace it from the inside of the main body 1, which reduces the difficulty of on-site maintenance and operation time, and at the same time improves the maintainability and economy of the valve during long-term use.

[0022] Please see the appendix Figure 3-4 or Figure 6 Preferably, in this embodiment, a baffle 17 is attached to the inner wall of the guide sleeve 9 on the side of the rotating disk 13 facing the movable block 15. The baffle 17 can be made of semi-circular plastic material or wood material to reduce the magnetic influence of the driven magnetic block 16 on the non-target driving magnetic block. The baffle 17 is used to block the driving magnetic block 14 or the driving magnetic block 14 when the driving magnetic block 14 or the driving magnetic block 15 corresponds to the driven magnetic block 16. When the driving magnetic block 14 or the driven magnetic block 16 corresponds to the driven magnetic block 16, the baffle 17 blocks the driving magnetic block 14. When the driving magnetic block 14 or the driven magnetic block 16 corresponds to the driven magnetic block 16, the baffle 17 blocks the driving magnetic block 14.

[0023] Preferably, in this embodiment, the first driving magnetic block 14, the second driving magnetic block, and the driven magnetic block 16 are each provided in two sets, for attachment Figure 6 As shown, two sets of driving magnetic blocks 14 are symmetrically and eccentrically embedded on the rotating disk 13, two sets of driving magnetic blocks 2 are symmetrically and eccentrically embedded on the rotating disk 13, and two sets of driven magnetic blocks 16 are symmetrically and eccentrically embedded on the movable block 15. Two sets of driven magnetic blocks 16 are symmetrically and eccentrically embedded on the movable block 15. Two sets of driving magnetic blocks 14 and two sets of driving magnetic blocks 2 are symmetrically and eccentrically embedded on the rotating disk 13, and the two sets of driving magnetic blocks 14 and two sets of driving magnetic blocks 2 are staggered. In the initial state, the two sets of driving magnetic blocks 14 correspond to the two sets of driven magnetic blocks 16. After the rotating disk 13 rotates by a preset angle, the two sets of driving magnetic blocks 2 correspond to the two sets of driven magnetic blocks 16.

[0024] As not shown in the figure, in this embodiment, the outer circumferential wall of the movable block 15 is embedded with a number of sets of balls, and the inner wall of the guide sleeve 9 is provided with a ball groove that cooperates with the balls along its axis. The cooperation between the balls and the ball groove allows the movable block 15 to move smoothly along the axis of the guide sleeve 9.

[0025] Example 2

[0026] Please see the appendix Figure 3-5 Based on Embodiment 1, in this embodiment, the movable plate 19 is connected to the connecting plate 20 via the connecting spring 21. The connecting plate 20 is slidably disposed inside the outer sleeve 18 and located below the movable plate 19. Optionally, in this embodiment, both the connecting plate 20 and the movable plate 19 can be slidably connected by a slider in cooperation with a vertical sliding groove provided on the inner wall of the outer sleeve 18. An adjusting screw 22 is threaded through the connecting plate 20, that is, a threaded hole that cooperates with the adjusting screw 22 is opened at the center of the connecting plate 20. The adjusting screw 22 is rotatably inserted into the bottom end of the outer sleeve 18. An operating disc for manual rotation by the user can be provided at the bottom end of the adjusting screw 22. The operator manually rotates the control panel, which drives the adjusting screw 22 to rotate. The adjusting screw 22 can move the connecting plate 20, thereby adjusting the elastic deformation of the connecting spring 21.

[0027] Example 3

[0028] Please see the appendix Figure 3-5 Based on embodiment 1, the guide sleeve 9 of this embodiment is provided with a locking member to lock the movable block 15. The locking member is connected to a driving member, and the driving member is located on the gear member. The driving component is used to drive the locking component to release the locking state of the movable block 15 when the valve stem 2 6 moves upward to the preset position. When the sealing plug 11 closes the vent hole 12 (i.e. the valve is in the closed state), the locking component positions the movable block 15 so that the sealing plug 11 is tightly attached to the partition plate, preventing the sealing plug 11 from accidentally detaching from the partition plate under the action of internal gas pressure, thereby ensuring reliable gas supply cut-off. When the valve stem 2 6 drives the movable frame 7 to move upward (i.e. the vent hole 12 needs to be opened for normal ventilation), the movable frame 7 drives the gear component to rotate through the rack 8, thereby causing the driving component to release the locking state of the locking component on the movable block 15. At this time, the movable block 15 can move freely to allow the sealing plug 11 to leave the partition plate.

[0029] Preferably, the driving component of this embodiment includes a follower wheel 23 fixedly sleeved on the outer wall of the gear component and located outside the guide sleeve 9. The follower wheel 23 is specifically sleeved on the outer wall of the shaft of the gear component and rotates with the shaft. An arc-shaped magnetic ring 24 is embedded on the follower wheel 23. The arc-shaped magnetic ring 24 is embedded on the circumferential outer wall of the follower wheel 23. A magnetic rod 25 (one end of which can be embedded with a magnetic ball so as to roll contact with the arc-shaped magnetic ring 24) is slidably provided on the guide sleeve 9 and located outside the follower wheel 23. The magnetic rod 25 is slidably connected to a vertical groove opened at one end of the guide sleeve 9 through a slider. The magnetic poles of the magnetic rod 25 and the arc-shaped magnetic ring 24 are opposite. The magnetic rod 25 is connected to a locking component through a pull rope 26. Optionally, the inner wall of the guide sleeve 9 in this embodiment is provided with a guide wheel-like structure for guiding the pull rope 26. The locking component includes a mounting cylinder 27 fixedly inserted into the guide sleeve 9. The end of the mounting cylinder 27 away from the guide sleeve 9 is closed, and the other end is hollow. A limiting post 28 is movably inserted into one end of the mounting cylinder 27. The limiting post 28 is configured to abut against the side of the movable block 15 near the drive rod 10 when the drive magnetic block 14 and the driven magnetic block 16 correspond (i.e., the sealing plug 11 closes the vent hole 12). The limiting post 28 is connected to the inner wall of the mounting cylinder 27 through an elastic element (such as a spring). The limiting post 28 is connected to the pull rope 26. The arc-shaped magnetic ring 24 is used to attract the magnetic rod 25 to move when the valve stem 2 (6) moves upward, and the pull rope 26 pulls the limiting post 28 into the mounting cylinder 27 when the magnetic rod 25 moves. For details, see attached. Figure 4 As shown, when the valve is in the closed state, i.e., when the driving magnetic block 14 corresponds to the driven magnetic block 16, the limiting post 28 is close to the side of the movable block 15 near the driving rod 10, which firmly positions the movable block 15 and effectively prevents the sealing plug 11 from accidentally dislodging from the partition under the action of internal gas pressure, ensuring reliable cut-off. When valve stem 26 drives movable frame 7 to move upward (requiring vent 12 to be opened), movable frame 7 drives gear component to rotate via rack 8. Gear component drives follower wheel 23 and arc-shaped magnetic ring 24 to rotate. Since the opposite poles of arc-shaped magnetic ring 24 and magnetic rod 25 attract each other, when arc-shaped magnetic ring 24 moves to the position corresponding to magnetic rod 25, magnetic rod 25 is attracted and moves to contact arc-shaped magnetic ring 24. Then, magnetic rod 25 pulls limit post 28 through pull rope 26 to compress elastic element 2 and enters installation cylinder 27, thereby releasing the lock on movable block 15. Subsequently, drive magnetic block 2 corresponds exactly to driven magnetic block 16. Movable block 15 drives sealing plug 11 to disengage from partition under magnetic repulsion, and vent 12 opens. It should be noted that when drive magnetic block 2 corresponds to driven magnetic block 16, arc-shaped magnetic ring 24 and magnetic rod 25 still remain corresponding, so that limit post 28 is continuously in retracted state.

[0030] Please see the appendix Figure 3-4 Preferably, in this embodiment, a movable groove communicating with the inner cavity of the mounting cylinder 27 is provided in the wall of the guide sleeve 9 on one side of the mounting cylinder 27. A movable slide 29 is slidably disposed in the movable groove. The movable slide 29 has a T-shaped vertical cross section, with one end extending into the guide sleeve 9. The inner wall of the guide sleeve 9 has a movable opening for the movable slide 29 to move. One end of the movable slide 29 is connected to the inner wall of the bottom of the movable groove through an elastic element 31 (such as a spring), and the other end is provided with a locking rod 30. The end of the locking rod 30 away from the movable slide 29 is arc-shaped. The outer wall of the limiting post 28 has an arc-shaped locking groove for the locking rod 30 to be inserted. The movable slide 29 extends into the guide sleeve 9 and is driven to move by the movable block 15. After the limiting post 28 enters the mounting cylinder 27, the locking rod 30 is locked into the arc-shaped slot to fix the limiting post 28. When the driving magnetic block 14 corresponds to the driven magnetic block 16, the movable slide 29 is driven by the movable block 15 to drive the locking rod 30 out of the arc-shaped slot. Specifically, after the limiting post 28 is pulled into the mounting cylinder 27 by the pull rope 26, the locking rod 30 engages with the arc-shaped locking groove, thereby temporarily fixing the limiting post 28 in the mounting cylinder 27. When the movable frame 7 resets downward and drives the gear component to reverse, causing the rotating disk 13 to reset and rotate, the arc-shaped magnetic ring 24 resets along with the follower wheel 23. At this time, since the limiting post 28 is still engaged and fixed by the locking rod 30 and the arc-shaped locking groove, the limiting post 28 will not extend, thus avoiding obstruction by the limiting post 28 during the process of the driving magnetic block 14 and the driven magnetic block 16 corresponding, and the movable block 15 driving the sealing plug 11 to move towards the partition and reset. When the driving magnetic block 14 and the driven magnetic block 16 correspond, the movable block 15 drives the sealing plug 11 to move towards the partition. Its movement will push the movable slide 29 to squeeze the elastic element 31, causing the locking rod 30 to disengage from the arc-shaped locking groove. The limiting post 28 then extends under the action of the elastic element 2 to position the movable block 15.

[0031] Preferably, in this embodiment, when the driving magnetic block 14 and the driven magnetic block 16 correspond, the arc-shaped magnetic ring 24 and the magnetic rod 25 are in a misaligned state. At this time, the magnetic rod 25 will not pull the limiting post 28 to move through the pull rope 26. When the rotating disk 13 starts to rotate, the arc-shaped magnetic ring 24 begins to correspond with the magnetic rod 25. When the driving magnetic block 14 and the driven magnetic block 16 correspond, the arc-shaped magnetic ring 24 and the magnetic rod 25 are in a corresponding state. Conversely, when the rotating disk 13 resets and rotates so that the driving magnetic block 14 and the driven magnetic block 16 correspond again, the arc-shaped magnetic ring 24 and the magnetic rod 25 are misaligned.

[0032] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A leak-proof gas pipeline self-closing valve, comprising a main body (1), an inlet pipe (2) and an outlet pipe (3) respectively disposed on both sides of the main body (1), a valve stem (4) inserted into the main body (1), an elastic diaphragm (5) disposed inside the main body (1) and connected to the valve stem (4), a valve stem (6) located below the valve stem (4) and magnetically connected to the valve stem (4), a partition disposed inside the outlet pipe (3), and a vent hole (12) opened on the partition; characterized in that: The valve also includes: a guide sleeve (9) fixed in the main body (1), an elastic drive component located at the bottom of the valve stem (6) and used to drive the valve stem (6) to return downward, and a drive rod (10) inserted at one end of the guide sleeve (9). One end of the drive rod (10) passes through the vent hole (12) and is connected to a sealing plug (11) for closing the vent hole (12). The other end is connected to a movable block (15) that is slidably connected to the inner wall of the guide sleeve (9). A driven magnetic block (16) is eccentrically embedded on the movable block (15). A rotating disk (13) is rotatably provided inside the guide sleeve (9). A drive magnetic block one (14) and a drive magnetic block two with opposite magnetic poles are eccentrically embedded on the rotating disk (13). The drive magnetic block two and the driven magnetic block (16) have the same magnetic poles. The rotating disk (13) is connected to the elastic drive component in a transmission manner. When the valve stem (6) moves upward to a preset position, the elastic drive component drives the rotating disk (13) to rotate by a preset angle so that the driving magnetic block (2) corresponds to the driven magnetic block (16). When the valve stem (6) moves downward to reset, the elastic drive component drives the rotating disk (13) to reset so that the driving magnetic block (14) corresponds to the driven magnetic block (16).

2. A self-closing valve for a gas pipeline according to claim 1, wherein The elastic drive component includes a movable frame (7) located at the bottom of the valve stem (6), a rack (8) located on one side of the movable frame (7), a gear that meshes with and connects to the rotating disk (13) and the rack (8), and an extension rod located at the bottom of the movable frame (7). The bottom of the extension rod movably passes through the main body (1) and extends into the outer sleeve (18). The outer sleeve (18) is detachably fixed to the bottom of the main body (1). A movable plate (19) detachably fixed to the extension rod is slidably arranged inside the outer sleeve (18). The movable plate (19) is connected to the inner wall of the outer sleeve (18) by a connecting spring (21).

3. A self-closing valve for a gas pipeline according to claim 2, wherein The movable plate (19) is connected to the connecting plate (20) by a connecting spring (21). The connecting plate (20) is slidably disposed inside the outer sleeve (18) and located below the movable plate (19). An adjusting screw (22) is threaded through the connecting plate (20) and is rotatably inserted into the bottom end of the outer sleeve (18).

4. A self-closing valve for a gas pipeline according to claim 1, wherein The inner wall of the guide sleeve (9) and the side of the rotating disk (13) facing the movable block (15) are fitted with a baffle (17). The baffle (17) is used to block the driving magnetic block one (14) or the driving magnetic block two (14) when they correspond to the driven magnetic block (16).

5. A self-closing valve for a gas pipeline according to claim 2, wherein The guide sleeve (9) is provided with a locking member for locking the movable block (15), and the locking member is connected to a driving member, which is located on a gear member. The driving component is used to drive the locking component to release the locking state of the movable block (15) when the valve stem (6) moves upward to a preset position.

6. A self-closing valve for a gas pipeline according to claim 5, wherein The driving component includes a follower wheel (23) fixedly sleeved on the outer wall of the gear component and located outside the guide sleeve (9). An arc-shaped magnetic ring (24) is embedded on the follower wheel (23). A magnetic rod (25) is slidably provided on the guide sleeve (9) and located outside the follower wheel (23). The magnetic rod (25) is connected to the locking component through a pull rope (26). The locking component includes a mounting cylinder (27) fixedly inserted into the guide sleeve (9). A limiting post (28) is movably inserted into one end of the mounting cylinder (27). The limiting post (28) is configured to abut against the side of the movable block (15) near the drive rod (10) when the drive magnet (14) and the driven magnet (16) correspond. The limiting post (28) is connected to the inner wall of the mounting cylinder (27) through an elastic element. The limiting post (28) is connected to the pull rope (26). The arc-shaped magnetic ring (24) is used to attract the magnetic rod (25) to move when the valve stem (6) moves upward, and the pull rope (26) pulls the limiting post (28) into the mounting cylinder (27) when the magnetic rod (25) moves.

7. A self-closing valve for a gas pipeline according to claim 6, wherein The guide sleeve (9) on one side of the mounting cylinder (27) has a movable groove that communicates with the inner cavity of the mounting cylinder (27). A movable slide (29) is slidably arranged in the movable groove. One end of the movable slide (29) is connected to the inner wall of the bottom of the movable groove through an elastic element (31), and the other end is provided with a locking rod (30). The outer wall of the limiting post (28) has an arc-shaped locking groove for the locking rod (30) to be inserted. The movable slide (29) extends into the guide sleeve (9) and is driven to move by the movable block (15). After the limiting post (28) enters the mounting cylinder (27), the locking rod (30) is inserted into the arc-shaped slot to fix the limiting post (28). When the driving magnetic block (14) corresponds to the driven magnetic block (16), the movable slide (29) is driven by the movable block (15) to drive the locking rod (30) out of the arc-shaped slot.

8. A self-closing valve for a gas pipeline according to claim 6, wherein When the driving magnetic block one (14) and the driven magnetic block (16) correspond, the arc-shaped magnetic ring (24) and the magnetic rod (25) are in a staggered state. When the driving magnetic block two and the driven magnetic block (16) correspond, the arc-shaped magnetic ring (24) and the magnetic rod (25) are in a corresponding state.

9. A self-closing valve for a gas pipeline according to claim 1, wherein The first driving magnetic block (14), the second driving magnetic block, and the driven magnetic block (16) are each provided in two sets; wherein, the two sets of driven magnetic blocks (16) are symmetrically and eccentrically embedded on the movable block (15), and the two sets of driving magnetic blocks (14) and the two sets of driving magnetic blocks (2) are symmetrically and eccentrically embedded on the rotating disk (13), and the two sets of driving magnetic blocks (14) and the two sets of driving magnetic blocks (2) are staggered.

10. A self-closing valve for a gas pipeline according to claim 1, wherein The outer circumference of the movable block (15) is fitted with several sets of balls, and the inner wall of the guide sleeve (9) is provided with a ball groove that cooperates with the balls along its axis.

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