Valve body opening structure and gas pipeline micro-leakage automatic shut-off valve thereof

Abstract

The utility model discloses a valve body opening structure and a gas pipeline micro-leakage automatic shut-off valve thereof, and relates to the technical field of structural design of gas pipeline safety equipment. The valve body opening structure comprises a pressing piece and a rebounding piece, the pressing piece is fixedly connected to the outer wall of the gas pipeline in a sealed mode, the rebounding piece is fixedly connected to a leather film driving structure, the lower end of the pressing piece stretches into the gas pipeline, the lower end of the pressing piece pushes the leather film driving structure to rotate anticlockwise, and the rebounding piece pushes the leather film driving structure to rotate clockwise. The gas pipeline micro-leakage automatic shut-off valve comprises a valve body opening structure, a connecting hole is formed in a gas pipeline, and the valve body opening structure is connected to the connecting hole in a sealed mode. According to the valve body opening structure and the gas pipeline micro-leakage automatic closing valve, the pressing piece is pressed to push the leather membrane driving structure to rotate anticlockwise, so that the leather membrane driving structure drives the corresponding leather membrane assembly in the valve body to achieve the leather membrane opening state. The rebounding piece drives the leather film to rotate clockwise to reset and drives the pressing piece to reset after the pressing piece is pressed.

Description

Technical Field

[0001] This utility model relates to the technical field of structural design of safety equipment for gas pipelines, and in particular to a valve body opening structure and its automatic shut-off valve for micro-leakage in gas pipelines. Background Technology

[0002] In gas pipeline systems, the safety and reliability of valves are paramount. Currently, the opening and closing of gas valves largely rely on complex mechanical structures or electronic control systems. Valves with automatic shut-off functions often use spring reset or electronic sensors to detect leaks; however, such designs are prone to seal failure due to mechanical wear, or lose their protective function in the event of power outages or sensor malfunctions. Furthermore, after frequent use, the sealing rings of some valves are prone to aging, resulting in the inability to promptly block gas flow in the event of a minor leak, posing a safety hazard.

[0003] For the valve in this application, the opening of the diaphragm in the prior art often relies on automatic control of the internal air pressure difference. However, in the case of air pressure imbalance or micro-leakage, the diaphragm may fail to open due to excessive sealing resistance. Therefore, a valve body opening scheme with simple structure, reliable sealing and both manual and automatic control functions is needed.

[0004] It is evident that in existing valve body opening structure technologies, there is a problem that the diaphragm may fail to open due to excessive sealing resistance in the event of internal micro-leakage or air pressure imbalance. Utility Model Content

[0005] In view of this, the main purpose of this utility model is to provide a valve body opening structure and an automatic shut-off valve for micro-leakage in gas pipelines, which can solve the problems in the prior art of valve mis-opening due to vibration or gas pressure fluctuations or the inability of the diaphragm to open automatically due to excessive sealing resistance. In addition, it solves the problem of automatic reset of the diaphragm drive structure after pressing the pressing part.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] The valve body opening structure includes a pressing element and a rebound element. The pressing element is sealed and fixedly connected to the outer wall of the gas pipeline, and the rebound element is fixedly connected to the diaphragm drive structure. The lower end of the pressing element extends into the interior of the gas pipeline. The lower end of the pressing element pushes the diaphragm drive structure to rotate counterclockwise, and the rebound element pushes the diaphragm drive structure to rotate clockwise.

[0008] In a preferred embodiment, the pressing component includes: a pressing cap, a fixing cylinder, and a pressing rod. The pressing cap is fixedly connected to the pressing component and is sleeved on the upper end of the fixing cylinder. The lower end of the fixing cylinder is fixedly connected to the inner wall of the gas pipeline. The pressing rod extends into the gas pipeline along the fixing cylinder, and the lower end of the pressing rod drives the diaphragm driving structure.

[0009] In a preferred embodiment, a guide ring is provided inside the fixed cylinder, and a sealing ring is fixedly connected to the upper and / or lower side of the guide ring, and the outer wall of the pressing rod is sealed with the sealing ring.

[0010] In a preferred embodiment, the pressing rod includes a threaded head, an extension rod, and a pressing head, wherein the threaded head, the extension rod, and the pressing head are integrally formed, the threaded head and the pressing cap are threadedly connected, the pressing head is disposed on the lower side of the guide ring, and the pressing head drives the diaphragm driving structure.

[0011] In a preferred embodiment, the outer diameter of the pressing head is larger than the inner diameter of the guide ring.

[0012] In a preferred embodiment, the pressing cap includes a cap body and a connector, wherein the connector is protruding inside the cap body and has an internal thread inside the connector, and the threaded end is threadedly connected to the connector.

[0013] In a preferred embodiment, the spring is a pressing spring, which is sleeved on the outer wall of the extension rod, with its upper end abutting against the inner wall of the pressing cap and its lower end abutting against the upper side of the guide ring.

[0014] In a preferred embodiment, the rebound element is a rebound spring, the lower end of which is fixedly connected to the inner wall of the gas pipeline, and the upper end of which abuts against the lower side of the diaphragm drive structure and pushes the diaphragm drive structure to rotate clockwise.

[0015] In a preferred embodiment, the rebound element is a permanent magnet, which is fixedly connected to the diaphragm driving structure. The pressing head is made of magnetic material, and the pressing head attracts the permanent magnet, causing the diaphragm driving structure to rotate clockwise.

[0016] The automatic shut-off valve for minor leaks in gas pipelines includes a valve body opening structure. The gas pipeline has a connection hole, and the valve body opening structure is sealed and connected to the connection hole.

[0017] The valve body opening structure and its automatic shut-off valve for minor leaks in gas pipelines disclosed in this utility model have the following beneficial effects:

[0018] The valve body opening structure includes a pressing element and a rebound element. The pressing element is sealed and fixedly connected to the outer wall of the gas pipeline, and the rebound element is fixedly connected to the diaphragm drive structure. The lower end of the pressing element extends into the gas pipeline, pushing the diaphragm drive structure to rotate counterclockwise, and the rebound element pushes the diaphragm drive structure to rotate clockwise. This automatic shut-off valve for minor gas pipeline leaks includes a valve body opening structure. The gas pipeline has a connection hole, and the valve body opening structure is sealed and connected to the connection hole.

[0019] This valve body opening structure and its automatic shut-off valve for minor leaks in gas pipelines are installed by sealing the valve body opening structure within a connection hole drilled in the gas pipeline. Pressing the pressing element causes it to push the diaphragm drive structure to rotate counterclockwise, which in turn drives the corresponding diaphragm assembly inside the valve body to open the diaphragm. A spring-loaded mechanism either resets the diaphragm by rotating it clockwise or resets it after pressing, resulting in a simple and reliable structure. Furthermore, the diaphragm drive structure can also be reset using a permanent magnet and a magnetic pressing head, providing different reset methods to suit different practical needs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a valve body opening structure according to one embodiment of the present disclosure;

[0022] Figure 2 This is a cross-sectional view of a valve body opening structure according to one embodiment of the present disclosure;

[0023] Figure 3 This is a schematic diagram of the push cap of a valve body opening structure according to one embodiment of the present disclosure;

[0024] Figure 4 This is a cross-sectional view of the push cap of a valve body opening structure according to one embodiment of the present disclosure;

[0025] Figure 5 This is a schematic diagram of the push rod of a valve body opening structure according to one embodiment of the present disclosure;

[0026] Figure 6 This is a schematic diagram of the fixed cylinder of the valve body opening structure according to one embodiment of the present disclosure;

[0027] Figure 7A cross-sectional view of the fixed cylinder of a valve body opening structure according to an embodiment of the present disclosure;

[0028] Figure 8 This is a schematic diagram of a diaphragm drive structure in which the spring-loaded component of the valve body opening structure according to one embodiment of the present disclosure is a spring-loaded spring.

[0029] Figure 9 This is a schematic diagram of a diaphragm drive structure in which the spring-loaded component of a valve body opening structure is a permanent magnet, according to one embodiment of the present disclosure.

[0030] Figure 10 This is a schematic diagram of a diaphragm drive structure in which the spring-loaded component of the valve body opening structure according to one embodiment of the present disclosure is a torsion spring.

[0031] Figure 11 A cross-sectional view of the interior of an automatic shut-off valve for micro-leakage in a gas pipeline according to one embodiment of this disclosure;

[0032] Figure 12 This is a cross-sectional view of another spring-loaded drive method for an automatic shut-off valve for micro-leakage in a gas pipeline according to one embodiment of the present disclosure;

[0033] Figure 13 A cross-sectional view of a gas pipeline micro-leakage automatic shut-off valve according to an embodiment of the present disclosure, and another spring-loaded component driving method;

[0034] Figure 14 for Figure 11 The enlarged cross-sectional view of the spring-loaded component at point A of the automatic shut-off valve for micro-leakage in a gas pipeline according to an embodiment of the present disclosure is a spring-loaded spring-driven component.

[0035] Figure 15 for Figure 12 The enlarged cross-sectional view of the spring-loaded component at point B of the automatic shut-off valve for micro-leakage in a gas pipeline according to an embodiment of the present disclosure is a press spring driven by a permanent magnet.

[0036] Figure 16 for Figure 13 The image shows a partially enlarged cross-sectional view of a gas pipeline micro-leakage automatic shut-off valve C according to an embodiment of the present disclosure, where the spring-loaded component is driven by a torsion spring.

[0037] [Explanation of Key Component Symbols]

[0038] 01. Valve housing;

[0039] 02. Valve cover;

[0040] 03. Membrane assembly;

[0041] 04. Valve body opening structure;

[0042] 041. Pressing component;

[0043] 0411, Press Cap;

[0044] 04111, Cap body; 04112, Connector;

[0045] 0412. Fixed cylinder;

[0046] 0413. Press lever;

[0047] 04131, Threaded head; 04132, Extension rod; 04133, Pressing head;

[0048] 042. Springback component;

[0049] 16. Membrane-driven structure;

[0050] 17. Guide ring;

[0051] 18. Sealing ring. Detailed Implementation

[0052] The valve body opening structure and its automatic shut-off valve for minor leaks in gas pipelines of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0057] according to Figures 1-16As shown, the valve body opening structure 04 includes a pressing element 041 and a rebound element 042. The pressing element 041 is sealed and fixedly connected to the outer wall of the gas pipeline, and the rebound element 042 is fixedly connected to the diaphragm drive structure 16. The lower end of the pressing element 041 extends into the gas pipeline. To allow the diaphragm to be opened manually, the lower end of the pressing element 041 pushes the diaphragm drive structure 16 to rotate counterclockwise, and the rebound element 042 pushes the diaphragm drive structure 16 to rotate clockwise to reset. When the diaphragm is closed due to micro-leakage or other reasons, the internal gas pressure of the valve body is relatively lower than or equal to the external gas pressure. To reopen the diaphragm, simply press the pressing element 041 of the valve body opening structure 04, causing the pressing element 041 to push the diaphragm drive structure 16, thereby opening the diaphragm sealing part. When gas flows, the internal gas pressure is greater than the external gas pressure, and the gas pressure inside the valve will exert an outward force on the diaphragm. When the gas flows normally, the thrust generated by the gas pressure causes the diaphragm to elastically deform and remain in the open position. At this time, the gas pressure can maintain a certain level, which is sufficient to overcome the elastic force of the diaphragm itself or the slight resistance generated by other factors, thereby keeping the diaphragm open and maintaining the normal flow of gas. Afterwards, the pressing element 041 is released, and the pressing element 041 is reset by the rebound element 042, separating from the diaphragm drive structure 16 to ensure normal pressing next time. Gas is dangerous, and in order to prevent accidental opening and safety accidents, the gas valve needs to be manually opened by the pressing element or other devices to control the opening of the gas passage, avoiding accidental valve opening caused by external factors such as vibration, gas fluctuations and other non-human factors. The pressing element 041 can overcome the sealing resistance of the diaphragm. Since the diaphragm has a certain resistance in the sealed blocking state, including the friction and rebound force at its own sealing point, the change in gas pressure inside the valve body alone is not enough to make the diaphragm overcome the resistance and open automatically. The pressing element 041, through mechanical transmission, provides sufficient force to push the diaphragm, enabling it to overcome sealing resistance and thus opening the valve seat, allowing gas to pass smoothly through the valve. Simultaneously, the return element 042 resets, moving away from the diaphragm drive structure 16 to ensure the pressing element can be repeatedly pressed. The pressing element 041, the return element 042, and the diaphragm drive structure 16 together constitute the valve body opening structure 04.

[0058] To ensure normal gas flow, the valve body opening structure 04 drives the diaphragm assembly 03 to maintain an open state. The valve cover 02 connects to the external atmospheric pressure of the gas passage, forming a stable pressure chamber between the valve cover 02 and the diaphragm assembly 03. This pressure chamber allows the diaphragm inside the valve to respond promptly and close when a minor leak occurs inside the valve body. In other words, one side of the diaphragm is a stable pressure chamber connected to external pressure. On the other side, when gas flows normally, the diaphragm elastically deforms and remains open because the internal gas pressure is greater than the external pressure. However, in the event of a minor leak, the internal gas pressure in the gas passage leaks, and when the pressure difference is less than or equal to the pressure chamber connected to external pressure, the diaphragm cannot maintain its elastic deformation state and thus cannot seal against the valve body 01, blocking the gas passage. Therefore, the diaphragm can quickly respond to seal and block the gas flow.

[0059] To ensure that the pressing component 041 can drive the diaphragm drive structure 16, the pressing component 041 includes: a pressing cap 0411, a fixing cylinder 0412, and a pressing rod 0413. The pressing cap 0411 is fixedly connected to the pressing component 041. The pressing cap 0411 is sleeved on the upper end of the fixing cylinder 0412. The lower end of the fixing cylinder 0412 is fixedly connected to the inner wall of the gas pipeline. The pressing rod 0413 extends into the gas pipeline along the fixing cylinder 0412. The lower end of the pressing rod 0413 drives the diaphragm drive structure 16. Press cap 0411 is sleeved on the upper end of fixed cylinder 0412. Press cap 0411 is fixedly connected to one end of press rod 0413. Press rod 0413 is inside fixed cylinder 0412. When press cap 0411 is pressed, the inner diameter of the skirt of press cap 0411 is larger than the outer diameter of the connection between fixed cylinder and press cap 0411. When press cap 0411 is pressed, the inner wall of the skirt of press cap 0411 moves downward against the outer wall of fixed cylinder 13, and at the same time drives press rod 0413 to move downward, so that the end of press rod 0413 away from press cap 0411 touches the diaphragm drive structure 16. To limit the movement distance of the pressing rod 0413, when the inner wall of the pressing cap 0411 touches the end of the pressing rod 12 or the skirt end of the pressing cap 0411 touches the stepped structure of the fixing cylinder 0412, the pressing cap 0411 cannot be pressed further down, and the pressing rod 0413 stops moving. The fixing cylinder 0412 is a cylinder with a through hole along the axial direction, penetrating both ends of the fixing cylinder 0412. To further limit the pressing of the pressing cap 0411, a hexagonal nut is threaded onto the outer wall of the fixing cylinder 0412, or a hexagonal protrusion is integrally formed on the outer wall. The protrusion extends around the circumference of the fixing cylinder 0412. The portion of the fixing cylinder 0412 located below the hexagonal nut or hexagonal protrusion is threaded and threadedly connected to a threaded hole in the gas pipeline. The connection between the hexagonal nut or hexagonal protrusion and the outer wall of the fixing cylinder 0412 is stepped, fitting with the pipeline connection port.

[0060] The upper end of the guide ring 17 inside the fixed cylinder 0412 is divided into the upper side of the fixed cylinder 0412, and the lower end of the guide ring 17 inside the fixed cylinder 0412 is divided into the lower side of the fixed cylinder 0412. To facilitate the installation of the spring-loaded component, the inner diameter of the upper side of the fixed cylinder 0412 is larger than the inner diameter of the lower side, and the inner diameter of the skirt of the pressing cap 0411 on the lower side of the fixed cylinder 0412 is larger than the outer diameter of the fixed cylinder 0412. This allows the pressing cap 0411 to be fitted onto the upper end of the fixed cylinder 0412. This structure restricts the movement of the pressing cap 0411 after pressing a certain distance, preventing further pressing. Since the pressing cap 0411 is fixedly connected to one end of the pressing rod 0413, it also simultaneously limits the movement of the pressing rod 0413, creating a linkage effect.

[0061] To improve the sealing performance of the valve body opening structure 04, a guide ring 17 protrudes inward from the inside of the fixed cylinder 0412. A sealing ring 18 is fixedly connected to the upper and / or lower sides of the guide ring 17, sealing the outer wall of the pressing rod 0413 with the sealing ring 18. The guide ring 17 protrudes axially around the inner wall of the fixed cylinder 0412 and extends towards the axis of the fixed cylinder 0412. The guide ring 17 ultimately forms a through hole at its center, the inner diameter of which is larger than the inner diameter of the pressing rod, allowing the end of the pressing rod 0413 to pass through. The connection between the upper and lower end faces of the guide ring 17 and the inner wall of the fixed cylinder 0412 is a stepped structure. To enhance sealing, sealing rings 18 can be provided at the upper and lower end faces of the guide ring 17 respectively. The inner wall of the fixed cylinder 0412, the end face of the guide ring 17, and the pressing rod 0413 passing through the central through hole of the guide ring 17 together limit the sealing ring 18. The sealing performance of the valve body opening structure 04 has been further improved, so that gas will not leak through the pressing part when the pressing rod 0413 is pressing and resetting.

[0062] In order to enable the pressing rod 0413 to drive the diaphragm driving structure 16, the pressing rod 0413 includes: a threaded head 04131, an extension rod 04132 and a pressing head 04133. The threaded head 04131, the extension rod 04132 and the pressing head 04133 are integrally formed. The threaded head 04131 and the pressing cap 0411 are threadedly connected. The pressing head 04133 is located on the lower side of the guide ring 17 and drives the diaphragm driving structure 16. The threaded head 04131 is threadedly fixed to the pressing cap 0411. One end of the extension rod 04132 is integrally formed with the threaded head 04131, passing through the central through hole of the guide ring 17. The other end is integrally formed with the pressing head 04133, whose outer diameter is larger than that of the extension rod 04132. The pressing head 04133 is located at the upper end of the guide ring 17 inside the fixed cylinder 0412, forming the upper side of the fixed cylinder 0412, and at the lower end of the guide ring 17, forming the lower side of the fixed cylinder 0412. To facilitate the installation of the spring-loaded component 042, the inner diameter of the upper side of the fixed cylinder 0412 is larger than the inner diameter of the lower side. The inner diameter of the lower side of the fixed cylinder 0412 is the same as the inner diameter of the pressing head 04133, allowing the outer wall of the pressing head 04133 to slide on the lower inner wall of the fixed cylinder 0412. When the pressing cap 0411 is pressed, it moves the pressing rod 0413, causing the pressing head 04133 to contact the diaphragm drive structure 16 and press down. The diaphragm drive structure 16 rotates during the pressing of the pressing head 04133 via a hinge rod or torsion spring, thereby opening the diaphragm. The fixed connection between the threaded head 04131 and the pressing cap 0411, and the direct contact between the pressing head 04133 and the diaphragm drive structure 16, ensures precise transmission of the pressing force. The design of the extension rod 04132 passing through the guide ring 17 ensures the linear movement of the pressing rod 0413, preventing deviation, thus driving the diaphragm drive structure 16 to rotate and complete the diaphragm opening action.

[0063] To further limit the movement of the pressing rod 0413, the outer diameter of the pressing head 04133 is larger than the inner diameter of the guide ring 17. The diameter of the through hole in the guide ring 17 is smaller than the diameter of the pressing head 04133. When the pressing element 041 resets, the rebound element 042 generates a rebound force, and the pressing cap 0411 moves away from the gas pipeline. When the pressing head 04133 moves to the position of the guide ring 17, it touches the lower end face of the guide ring 17 and stops moving, thus limiting the movement of the pressing head 04133. The dimensional fit between the pressing head 04133 and the guide ring 17 forms a limit, preventing the pressing rod 0413 from being excessively pressed down, which could cause structural damage. At the same time, this limiting design ensures that the pressing head 04133 only contacts the diaphragm drive structure 16 within its effective stroke, avoiding excessive movement that could affect the sealing performance or reset function.

[0064] To connect the press cap 0411 to the threaded head 04131, the press cap 0411 includes a cap body 04111 and a connector 04112. The connector 04112 protrudes from the inside of the cap body 04111, and the connector 04112 has internal threads. The threaded head 04131 is threadedly connected to the connector. The cap body 04111 and the connector 04112 are integrally formed. The connector 04112 is cylindrical and extends from the inside of the cap body 04111 towards the press head 04133. The connector 04112 has internal threads and is fixedly connected to the threaded head 04131. The threaded connection between the connector 04112 and the threaded head 04131 simplifies the assembly process and enhances the connection strength between the press cap 0411 and the press rod 0413. The integrally formed cap body 04111 and connector 04112 structure avoids the risk of loosening and ensures the stability and sealing of the pressing action.

[0065] To secure the spring-loaded component 042 and provide the pressing component 041 with a pressing and rebound function, the spring-loaded component 042 is a pressing spring. The pressing spring is sleeved on the outer wall of the extension rod 04132, with its upper end abutting against the inner wall of the pressing cap 0411 and its lower end abutting against the upper side of the guide ring 17. The pressing spring is sleeved on the outer walls of the extension rod 04132 and the connector 04112. When the pressing cap 0411 is pressed down, the upper end of the pressing spring is subjected to downward pressure, compressing the spring and producing elastic deformation. When the pressing stops and the pressing cap 0411 is released, the pressing spring returns to its initial position under the action of the elastic force. The pressing spring located in the fixed cylinder 0412 only acts on the pressing rod 0413 and the pressing cap 0411, causing them to return to their original position. The compression and rebound action of the press spring provides an automatic reset function for the press element 0413, ensuring that the press rod 0413 quickly returns to its initial position after the press cap 0411 is released. The design of the press spring being sleeved on the outer wall of the extension rod 04132 optimizes space utilization while preventing spring offset and ensuring the reliability of the reset action.

[0066] In one embodiment, to reset the diaphragm drive structure 16 and the pressing member 041, a torsion spring is provided at the hinge groove 5 between the diaphragm drive structure 16 and the valve housing 01. By pressing down on the pressing member 041, the pressing head 04133 contacts the upper fold 22 of the diaphragm drive structure 16, applying downward pressure and pushing the diaphragm drive structure 16 to rotate counterclockwise. The torsion arm of the torsion spring undergoes elastic torsional deformation due to the force generated by the rotation of the diaphragm drive structure 16. When the pressing member 041 is stopped, the torsion spring stops torsional deformation, releases torque using stored elastic potential energy, and returns to its initial shape, thus resetting the diaphragm drive structure 16 to its original position. Simultaneously, the pressing head 04133, which is pressed against the upper fold 22, moves upward due to the diaphragm drive structure 16, causing the pressing member 041 to also reset.

[0067] In another embodiment, to reset the diaphragm drive structure 16, the return element 042 is a spring. The lower end of the spring is fixedly connected to the inner wall of the gas pipeline, and the upper end of the spring abuts against the lower side of the diaphragm drive structure 16, pushing the diaphragm drive structure 16 to rotate clockwise. A spring fixing element is provided on the inner wall of the gas pipeline below the diaphragm drive structure 16. The fixing element is fixedly connected to the inner wall of the gas pipeline, or fixedly connected by threads. One end of the spring is sleeved on the fixing element and abuts against the platform surface where the fixing element and the spring contact, and the other end of the spring abuts against the spring fixing groove opened in the diaphragm drive structure 16. When the pressing element 041 is pressed down, the pressing head 04133 touches the diaphragm drive structure 16, and the diaphragm drive structure generates a rotational force through the hinge rod, rotating counterclockwise. The spring groove in contact with the spring also deforms when the diaphragm drive structure 16 rotates, storing elastic potential energy. When the pressing member 041 is released, the diaphragm drive structure 16 is no longer under force, and the elastic potential energy is released by the return spring on the fixing member. Before the spring returns to its elastic deformation, the diaphragm drive structure 16 resets. At the same time, it drives the pressing head against the diaphragm drive structure 16 to move upward, thereby causing the pressing member 041 to also reset via its return spring. The return spring located in the spring fixing groove on the fixing member acts on the diaphragm drive structure 16 and the pressing member 041, causing them to reset. The return spring acts directly below the diaphragm drive structure 3, achieving rapid reset of the diaphragm drive structure 16 and the pressing member 041 through the storage and release of elastic potential energy. This design reduces the dependence on linkage components, simplifies the structure, and improves the reset response speed.

[0068] In another embodiment, in addition to the aforementioned spring-loaded member 042 and pressing member 041 structure, another structure can be used to press and reset the diaphragm drive structure 16. The spring-loaded member 042 is a permanent magnet, which is fixedly connected to the diaphragm drive structure 16. The pressing head 04133 is made of magnetic material, and it attracts the permanent magnet, causing the diaphragm drive structure 16 to rotate clockwise. In this configuration, the permanent magnet is located within an annular groove on the diaphragm drive structure 16, below the pressing head 04133, which is perpendicular to the permanent magnet. The end of the pressing head 04133 is made of magnetic material with opposite magnetic poles to the permanent magnet, ensuring that the two components can be attracted together. When the pressing component 041 is pressed down, the pressing head 04133 contacts the diaphragm drive structure 16. The permanent magnet of the diaphragm drive structure 16 is attracted to the magnetic material of the pressing head 04133. As the pressing component 041 continues to press down, the diaphragm drive structure 16 rotates via a hinge rod, pushing the diaphragm assembly 03 to move and open the diaphragm. When the pressing component is elastically reset by the pressing spring, the pressing head 04133 is attracted to the magnet, causing the diaphragm drive structure 16 to reset. When the diaphragm drive structure 16 rotates to the lower end face of the fixed cylinder 0412, it contacts the lower end face of the fixed cylinder 0412, and the permanent magnet separates from the pressing head 04133. The magnetic attraction between the permanent magnet and the magnetic pressing head 04133 provides an alternative reset method, avoiding mechanical wear of the spring return component and extending its service life. The magnetic reset action is smooth and stable, making it particularly suitable for valve control scenarios requiring high frequency or high precision.

[0069] To install the valve body opening structure 04 into the gas pipeline and achieve automatic shut-off in the event of a minor leak, this automatic shut-off valve for minor gas leaks includes the valve body opening structure 04. The gas pipeline has a connection hole 6, and the valve body opening structure 04 is sealed and connected to the connection hole 6. By creating the connection hole 6 on the gas pipeline, the valve body opening structure 04 is sealed and installed inside the hole. It is manually opened by pressing, and combined with the reset of the diaphragm drive structure, it automatically shuts off when the gas pressure is abnormal. When a minor leak or gas pressure imbalance is detected, the valve automatically cuts off the gas passage through the rapid response of the diaphragm sealing structure, while retaining the manual opening function, balancing safety and ease of operation, and effectively preventing gas leak accidents.

[0070] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A valve body opening structure, characterized in that, Comprise: Pushing piece (041) and rebound piece (042), the pushing piece (041) is sealed fixedly connected on the outer wall of gas pipeline, the rebound piece (042) is fixedly connected in the skin film drive structure (16), the lower end of the pushing piece (041) pushes the skin film drive structure (16) counterclockwise rotation, the rebound piece (042) pushes the skin film drive structure (16) clockwise rotation.

2. The valve body opening structure according to claim 1, wherein The pushing piece (041) comprises: pushing cap (0411), fixed cylinder (0412) and pressing rod (0413), the pushing cap (0411) is fixedly connected with the pushing piece (041), the pushing cap (0411) is sleeved on the upper end of the fixed cylinder (0412), the lower end of the fixed cylinder (0412) is fixedly connected with the inner wall of the gas pipeline, the pressing rod (0413) is inserted into the gas pipeline along the fixed cylinder (0412), and the lower end of the pressing rod (0413) drives the skin film drive structure (16).

3. The valve body opening structure according to claim 2, wherein The inside of the fixed cylinder (0412) is inwardly convex with a guide convex ring (17), the upper side and / or the lower side of the guide convex ring (17) is fixedly connected with a sealing ring (18), and the outer wall of the pressing rod (0413) is sealed with the sealing ring (18).

4. The valve body opening structure according to claim 3, wherein The pressing rod (0413) comprises: threaded head (04131), elongated rod (04132) and pressing head (04133), the threaded head (04131), the elongated rod (04132) and the pressing head (04133) are integrally formed, the threaded head (04131) is threadedly connected with the pressing cap (0411), the pressing head (04133) is arranged at the lower side of the guide convex ring (17), and the pressing head (04133) drives the skin film drive structure (16).

5. The valve body opening structure according to claim 4, wherein The outer diameter of the pressing head (04133) is greater than the inner diameter of the guide convex ring (17).

6. The valve body opening structure of claim 4, wherein The pressing cap (0411) comprises: cap body (04111) and connecting head (04112), the connecting head (04112) is convex in the inside of the cap body (04111), the inside of the connecting head (04112) is provided with an internal thread, and the threaded head (04131) is threadedly connected with the connecting head (04112).

7. A valve opening structure according to any one of claims 4 to 6, wherein The rebound piece (042) is a pressing spring, the pressing spring is sleeved on the outer wall of the elongated rod (04132), the upper end of the pressing spring abuts against the inner wall of the pressing cap (0411), and the lower end of the pressing spring abuts against the upper side of the guide convex ring (17).

8. Valve opening structure according to any one of claims 4-6, characterized in that The rebound piece (042) is a rebound spring, the lower end of the rebound spring is fixedly connected with the inner wall of the gas pipeline, the upper end of the rebound spring abuts against the lower side of the skin film drive structure (16), and the skin film drive structure (16) is pushed to rotate clockwise.

9. The valve-opening structure according to any one of claims 4 to 6, characterized by The resilient piece (042) is a permanent magnet fixedly connected to the film driving structure (16), and the pressing head (04133) is a magnetic material, which adsorbs the permanent magnet to drive the film driving structure (16) to rotate clockwise.

10. A gas pipeline micro-leak automatic shut-off valve characterized by, The valve opening structure (04) of any one of claims 1-9 is sealed and connected to a connecting hole of the gas pipeline.

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