Gas pipeline micro-leakage automatic closing valve and self-closing valve thereof

Abstract

The invention discloses a gas pipeline micro-leakage automatic closing valve and a self-closing valve thereof, and relates to the technical field of structural design of gas pipeline safety equipment. The gas pipeline micro-leakage automatic closing valve comprises a valve shell, a valve cover, a leather membrane assembly and a valve body opening structure, the leather membrane assembly is connected between the valve shell and the valve cover in a pressing mode, the valve body opening structure is arranged at the other end of the valve shell, and the valve body opening structure pushes the leather membrane assembly to enable gas of the valve shell to be conducted or closed. The valve cover comprises a cover body and a conducting piece, the cover body is installed in the gas channel and is communicated with the outside of the gas valve of the gas channel through the conducting piece, the outer wall of one end of the conducting piece is in sealed connection with the cover body, and the other end of the conducting piece is in sealed connection with the gas channel. The self-closing valve comprises a gas pipeline micro-leakage automatic closing valve and further comprises a self-closing valve shell, and the gas pipeline micro-leakage automatic closing valve is fixedly connected into the self-closing valve shell. Through grooves of the valve shell are symmetrical to ensure quick transmission of pressure change.

Description

Technical Field

[0001] The present invention relates to the technical field of the structural design of gas pipeline safety equipment, and particularly relates to a gas pipeline micro-leakage automatic shut-off valve and its self-closing valve. Background Art

[0002] As one of the important energy sources, gas is widely used in residential life and industrial production. However, gas leakage may trigger serious safety accidents such as fires and explosions. Therefore, the safety protection equipment for gas pipelines is particularly important. In actual applications, however, parts such as pipeline interfaces and valves are prone to micro-leakage due to factors such as material aging, vibration, or installation defects. Although there are various gas automatic shut-off valves in the prior art, they still have significant deficiencies in terms of micro-leakage detection response speed, structural stability, and long-term sealing performance.

[0003] First of all, the existing valve structures are complex, making the installation and maintenance processes cumbersome. Secondly, there is no shut-off valve in the prior art that can be automatically closed during micro-leakage, resulting in the valve being unable to respond quickly when micro-leakage occurs. Moreover, existing gas valves generally adopt mechanical spring-type or electronic induction-type closing devices, resulting in insufficient response speed. At the same time, electronic valves may fail during power outages or extreme conditions.

[0004] It can be seen that the existing gas valves have redundant structures and cannot be closed when micro-leakage occurs in the gas pipeline, making it difficult to achieve automatic detection and automatic blocking of micro-leakage in gas pipelines. Summary of the Invention

[0005] In view of this, the main object of the present invention is to provide a gas pipeline micro-leakage automatic shut-off valve and its self-closing valve, which can solve the problems of redundant structures, short sealing life, and easy failure of the drive in the prior art gas valves, and the shut-off valve is prone to closing when subjected to external forces. In addition, it can solve the problems in the prior art that the valve is prone to mis-opening due to vibration or air pressure fluctuations or the diaphragm cannot be automatically opened due to excessive sealing resistance. Moreover, it solves the problem of the automatic reset of the diaphragm drive structure after pressing the pressing member.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows:

[0007] The gas pipeline micro-leakage automatic shut-off valve includes: a valve housing, a valve cover, a diaphragm assembly, and a valve body opening structure. The diaphragm assembly is tightly connected between the valve housing and the valve cover, and the valve body opening structure is provided at the other end of the valve housing to push the diaphragm assembly to conduct or close the gas in the valve housing.

[0008] In a preferred embodiment, the valve cover includes a cover body and a conducting member. The cover body is installed inside the gas passage, and the cover body conducts the gas passage to the outside of the gas valve through the conducting member. One end outer wall of the conducting member is hermetically connected to the cover body, and the other end of the conducting member is hermetically connected to the gas passage.

[0009] In a preferred embodiment, the valve housing includes a conducting portion, a connecting portion, and an extending portion. The conducting portion, the connecting portion, and the extending portion are integrally formed in sequence or fixedly connected. A conducting groove is formed through the outer wall of the conducting portion. The outer wall of the connecting portion is hermetically and fixedly connected to the gas valve pipeline. The extending portion is connected with a driving mechanism to drive the diaphragm assembly by the driving mechanism.

[0010] A plurality of the conducting grooves are provided, and at the position between adjacent conducting grooves, a threaded connection hole is formed at the end of the conducting portion.

[0011] In a preferred embodiment, four conducting grooves are provided, and four threaded connection holes are provided. The distance between adjacent conducting grooves is greater than the diameter of the threaded connection hole, and the threaded connection hole is formed at the middle position between adjacent conducting grooves.

[0012] In a preferred embodiment, a support frame is convexly provided in the middle of the connecting portion, and the support frame supports the diaphragm assembly.

[0013] In a preferred embodiment, the support frame includes a support rod and a support ring. The support rod is integrally formed on the outer wall of the support ring, and the other end of the support rod is integrally formed or fixedly connected to the inner wall of the connecting portion. The diaphragm assembly is arranged through the support ring.

[0014] In a preferred embodiment, a hinge groove is formed on the upper side of the extending portion. The driving mechanism is hinged inside the extending portion and extends out at the hinge groove.

[0015] In a preferred embodiment, the driving mechanism includes a hinge rod, an upper folding portion, and a lower folding portion. The upper folding portion and the lower folding portion are integrally formed into a bent structure. A hinge hole is formed at the upper end of the lower folding portion, and the hinge rod passes through the hinge hole. Both ends of the hinge rod are rotatably connected to the inner wall of the extending portion.

[0016] In a preferred embodiment, guide convex ribs are convexly provided on the inner wall of the extending portion at both sides of the lower folding portion.

[0017] In a preferred embodiment, the outer diameters of the conducting portion, the connecting portion, and the extending portion decrease in sequence.

[0018] In a preferred embodiment, the cover body includes: a connecting ring, a pressing plate, and a sealing cylinder. One end of the sealing cylinder is open, and the pressing plate is integrally formed at the opening of the sealing cylinder. The pressing plate extends outward from the sealing cylinder, and the connecting ring is integrally formed outside the pressing plate;

[0019] In a preferred embodiment, the connecting ring and the pressing plate are integrally formed through an extension cylinder, and the extension cylinder extends away from the sealing cylinder;

[0020] In a preferred embodiment, a sealing groove is provided at the position between the extension cylinder and the pressing plate, and a sealing ring is arranged inside the sealing groove.

[0021] In a preferred embodiment, the conducting member includes: a first sealing portion, an elongation portion, and a second sealing portion. The first sealing portion, the elongation portion, and the second sealing portion are integrally formed in sequence. The first sealing portion is sealingly connected to the sealing cylinder, and the second sealing portion is sealingly connected to the gas valve pipeline;

[0022] In a preferred embodiment, a through hole is formed through the centers of the first sealing portion, the elongation portion, and the second sealing portion;

[0023] In a preferred embodiment, the outer diameters of the first sealing portion, the elongation portion, and the second sealing portion increase in sequence;

[0024] In a preferred embodiment, external sealing threads are provided on the outer sides of the first sealing portion and the second sealing portion, and internal sealing threads are formed through the side wall of the sealing cylinder. The external sealing threads of the first sealing portion are sealingly connected to the internal sealing threads;

[0025] In a preferred embodiment, the conducting member further includes: a limiting plate. The limiting plate is integrally formed at one end of the second sealing portion away from the elongation portion, and the through hole penetrates through the limiting plate;

[0026] In a preferred embodiment, a slotted hole is provided on one side of the limiting plate away from the second sealing portion.

[0027] In a preferred embodiment, the diaphragm of the diaphragm assembly includes: a connecting ring, a rebounding portion, and a sealing portion. The rebounding portion is open, the connecting ring is integrally formed at the edge of the rebounding portion, and the sealing portion is fixedly connected to the center of the rebounding portion;

[0028] In a preferred embodiment, the sealing portion is cylindrical;

[0029] In a preferred embodiment, one end of the sealing portion is integrally formed with the rebounding portion, and a sealing convex ring protrudes from the other end of the sealing portion;

[0030] In a preferred embodiment, the sealing convex ring is provided at the edge of the sealing portion;

[0031] In a preferred embodiment, the diaphragm assembly further includes: a driving assembly, and the driving assembly is fixedly connected along the center of the sealing portion;

[0032] In a preferred embodiment, the driving assembly includes: a fixed shell and a movable assembly, the edge of the fixed shell and the connecting ring are tightly pressed and sealedly connected, a through hole is provided at the center of the fixed shell, and the movable assembly is arranged through the through hole;

[0033] In a preferred embodiment, the movable assembly is fixedly connected to the sealing portion;

[0034] In a preferred embodiment, the movable assembly includes: a driving rod, a threaded rod, a connecting cylinder and a driving magnet; one end of the threaded rod is integrally formed with the driving rod, the other end of the threaded rod is threadedly connected to the connecting cylinder, and the other end of the connecting cylinder is fixedly connected to the driving magnet;

[0035] In a preferred embodiment, the threaded rod passes through the center of the sealing portion and is fixedly connected to the sealing portion;

[0036] In a preferred embodiment, the connecting cylinder passes through the through hole;

[0037] In a preferred embodiment, the diameter of the driving rod is larger than that of the threaded rod, and the driving rod is pressed against the end of the sealing portion;

[0038] In a preferred embodiment, the driving magnet is a magnetic ring, an open hole is provided at the center of the magnetic ring, and a screw is arranged through the open hole, and the screw presses and connects the magnetic ring to the end of the connecting cylinder.

[0039] In a preferred embodiment, the valve body opening structure includes: a pressing member and a rebounding member, the pressing member is hermetically and fixedly connected to the outer wall of the gas pipeline, the rebounding member is fixedly connected to the diaphragm driving structure, the lower end of the pressing member extends into the interior of the gas pipeline, the lower end of the pressing member pushes the diaphragm driving structure to rotate counterclockwise, and the rebounding member pushes the diaphragm driving structure to rotate clockwise;

[0040] In a preferred embodiment, the pressing member includes: a pressing cap, a fixed cylinder and a pressing rod, the pressing cap is fixedly connected to the pressing member, the pressing cap is sleeved on the upper end of the fixed cylinder, the lower end of the fixed cylinder is fixedly connected to the inner wall of the gas pipeline, the pressing rod extends into the interior of the gas pipeline along the fixed cylinder, and the lower end of the pressing rod drives the diaphragm driving structure;

[0041] In a preferred embodiment, a guiding convex ring protrudes inwards inside the fixed cylinder, and a sealing ring is fixedly connected to the upper side and / or the lower side of the guiding convex ring, and the outer wall of the pressing rod is sealed with the sealing ring;

[0042] In a preferred embodiment, the pressing rod includes a threaded head, an extension rod and a pressing head, the threaded head, the extension rod and the pressing head are integrally formed, the threaded head is threadedly connected to the pressing cap, the pressing head is arranged below the guiding convex ring, and the pressing head drives the diaphragm driving structure;

[0043] In a preferred embodiment, the outer diameter of the pressing head is greater than the inner diameter of the guiding convex ring;

[0044] In a preferred embodiment, the pressing cap includes a cap body and a connecting head, the connecting head protrudes inside the cap body, an internal thread is provided inside the connecting head, and the threaded head is threadedly connected to the connecting head.

[0045] In a preferred embodiment, the elastic member is a pressing spring, the pressing spring is sleeved on the outer wall of the extension rod, the upper end of the pressing spring abuts against the inner wall of the pressing cap, and the lower end of the pressing spring abuts against the upper side of the guiding convex ring;

[0046] In a preferred embodiment, or the elastic member is a return spring, the lower end of the return spring is fixedly connected to the inner wall of the gas pipeline, the upper end of the return spring abuts against the lower side of the diaphragm driving structure, and pushes the diaphragm driving structure to rotate clockwise;

[0047] In a preferred embodiment, or the elastic member is a permanent magnet, the permanent magnet is fixedly connected to the diaphragm driving structure, the pressing head is made of a magnetic material, and the pressing head adsorbs the permanent magnet to drive the diaphragm driving structure to rotate clockwise.

[0048] This self-closing valve includes an automatic gas pipeline micro-leakage closing valve and also includes a self-closing valve housing, and the automatic gas pipeline micro-leakage closing valve is fixedly connected inside the self-closing valve housing.

[0049] A gas pipeline micro-leakage automatic closing valve and its self-closing valve of the present invention have the following beneficial effects:

[0050] The automatic shut-off valve for micro-leakage of gas pipelines includes: a valve housing, a valve cover, a diaphragm assembly, and a valve body opening structure. The diaphragm assembly is tightly connected between the valve housing and the valve cover. The other end of the valve housing is provided with the valve body opening structure, so that the valve body opening structure pushes the diaphragm assembly to conduct or close the gas in the valve housing. The valve cover includes: a cover body and a conducting member. The cover body is installed inside the gas passage, and the cover body conducts the gas outside the gas valve through the conducting member. One end outer wall of the conducting member is hermetically connected to the cover body, and the other end of the conducting member is hermetically connected to the gas passage. This self-closing valve includes the automatic shut-off valve for micro-leakage of gas pipelines and also includes a self-closing valve housing. The automatic shut-off valve for micro-leakage of gas pipelines is fixedly connected inside the self-closing valve housing.

[0051] The automatic shut-off valve for micro-leakage of gas pipelines is integrally formed or fixedly connected, reducing the number of components, lowering the assembly complexity, and adapting to installation in narrow spaces. The conducting member fixed by the cover body conducts the external atmospheric pressure, generating a stable air pressure chamber communicating with the outside atmospheric pressure between the valve cover and one side of the diaphragm inside the gas valve. The diaphragm can close the gas passage in the case of micro-leakage of gas. Through the valve body opening structure, the pressing member pushes the diaphragm driving structure to realize the opening state of the diaphragm. In this self-closing valve, the automatic shut-off valve for micro-leakage of gas pipelines is fixedly connected inside the self-closing valve housing, and each component acts together inside the self-closing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0053] Figure 1 FIG. 12 is a schematic structural view of the valve housing of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0054] Figure 2 FIG. 16 is a schematic structural view of the valve housing of the automatic shut-off valve for micro-leakage of gas pipelines from another angle according to an embodiment of the present disclosure;

[0055] Figure 3 FIG. 20 is a schematic structural view of the valve cover of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0056] Figure 4 FIG. 24 is a cross-sectional view of the cover body of the valve cover of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0057] Figure 5 FIG. 28 is a schematic structural view of the conducting member of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0058] Figure 6 Schematic diagram of the diaphragm of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0059] Figure 7 Schematic diagram of the fixed shell of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0060] Figure 8 Schematic diagram of the diaphragm driving magnet and screw of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0061] Figure 9 Schematic diagram of the support state of the driving rod inside the valve housing of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0062] Figure 10 Cross-sectional view of the valve housing and the sealing cover of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0063] Figure 11 Schematic diagram of the pressing rod of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0064] Figure 12 Schematic diagram of the diaphragm driving structure with a return spring as the return member of the valve body opening structure of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0065] Figure 13 Schematic diagram of the diaphragm driving structure with a permanent magnet as the return member of the valve body opening structure of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0066] Figure 14 Schematic diagram of the diaphragm driving structure with a torsion spring as the return member of the valve body opening structure of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0067] Figure 15 Cross-sectional view of the inside of the self-closing valve according to an embodiment of the present disclosure;

[0068] Figure 16 Cross-sectional view of another return member driving method inside the self-closing valve according to an embodiment of the present disclosure;

[0069] Figure 17 Cross-sectional view of yet another return member driving method inside the self-closing valve according to an embodiment of the present disclosure;

[0070] Figure 18Cross-sectional view of the valve body opening structure of the automatic shut-off valve for micro-leakage of gas pipelines according to an embodiment of the present disclosure;

[0071] Figure 19 For Figure 15 Partial enlarged cross-sectional view of the return member at position A inside the self-closing valve according to an embodiment of the present disclosure, with the return spring driving method;

[0072] Figure 20 For Figure 16 Partial enlarged cross-sectional view of the return member at position B inside the self-closing valve according to an embodiment of the present disclosure, with the pressing spring and permanent magnet driving method;

[0073] Figure 21 For Figure 17 Partial enlarged cross-sectional view of the return member at position C inside the self-closing valve according to an embodiment of the present disclosure, with the torsion spring driving method.

[0074]

Description of Main Component Symbols

[0075] 01, valve housing;

[0076] 011, conduction part; 012, connection part; 013, extension part;

[0077] 1, conduction groove;

[0078] 2, driving mechanism;

[0079] 21, hinge rod; 22, upper folding part; 23, lower folding part;

[0080] 3, threaded connection hole;

[0081] 4, support frame;

[0082] 41, support rod; 42, support ring;

[0083] 5, hinge groove; 6, hinge hole; 7, guiding rib;

[0084] 02, valve cover;

[0085] 021, cover body;

[0086] 0211, connection ring; 0212, pressing plate; 0213, sealing cylinder;

[0087] 022, conduction member;

[0088] 0221, first sealing part; 0222, elongation part; 0223, second sealing part; 0224, limiting plate;

[0089] 8, extension cylinder; 9, sealing groove; 10, sealing ring; 11, guiding through hole;

[0090] 12. Sealed external thread; 13. Sealed internal thread;

[0091] 03. Diaphragm assembly;

[0092] 031. Connecting ring; 032. Rebound part; 033. Sealing part; 0331. Sealing convex ring;

[0093] 14. Driving assembly;

[0094] 141. Fixed housing; 1411. Through hole;

[0095] 142. Movable assembly;

[0096] 1421. Driving rod; 1422. Threaded rod; 1423. Connecting cylinder; 1424. Driving magnet;

[0097] 15. Screw;

[0098] 04. Valve body opening structure;

[0099] 041. Pressing part;

[0100] 0411. Pressing cap;

[0101] 04111. Cap body; 04112. Connecting head; 0412. Fixed cylinder; 0413. Pressing rod;

[0102] 04131. Threaded head; 04132. Extension rod; 04133. Pressing head;

[0103] 042. Rebound part;

[0104] 16. Diaphragm driving structure; 17. Guide convex ring; 18. Sealing ring; 0001. Gas channel. Detailed implementation manners

[0105] The gas pipeline micro-leakage automatic closing valve and its self-closing valve of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments of the present invention.

[0106] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and embodiments.

[0107] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0108] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0109] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used here will be made.

[0110] According to Figures 1 - 21 As shown, the automatic shut-off valve for micro-leakage of gas pipelines includes a valve housing 01 and a valve cover 02 for fixing the diaphragm, and a diaphragm assembly 03 and a valve body opening structure 04 for realizing the gas conduction inside the valve body. The diaphragm assembly 03 is tightly connected between the valve housing 01 and the valve cover 02, and the valve body opening structure 04 is arranged at the other end of the valve housing 01. The valve body opening structure 04 pushes the diaphragm assembly 03 to make the gas conduction or cut-off of the valve housing 01.

[0111] The valve cover 02 includes a cover body 021 and a conducting member 022. This automatic shut-off valve for slight leakage of gas pipelines is fixedly connected to the gas passage 0001, and the cover body 021 is installed inside the gas passage 0001. In order to enable the conducting member 022 of the cover body 021 to play the role of connecting to the external atmospheric pressure, in the case of slight leakage of the gas pipeline, the diaphragm inside the shut-off valve can respond in time to push for closing, sealing and blocking the gas. The cover body 021 conducts the outside of the gas passage 0001 through the conducting member 022. There are multiple openings on the connecting ring of the valve cover 02, and the valve cover 02 and the valve housing 01 are tightly sealed and connected with the diaphragm assembly 03, that is, the diaphragm of the diaphragm assembly 03 is located between the valve cover 02 and the valve housing 01. One end outer wall of the conducting member 022 is hermetically connected to the cover body 021, and the other end of the conducting member 021 is hermetically connected to the gas passage 0001, conducting the external atmospheric pressure, and generating a stable air pressure chamber communicating with the external atmospheric pressure between the valve cover 02 and one side of the diaphragm inside the gas valve. When there is a slight leak, the air pressure on the side of the diaphragm close to the fixedly connected side of the valve housing 01 decreases, while the pressure on the side of the diaphragm close to the fixedly connected side of the valve cover 02 remains unchanged as it is conducted to the external air pressure. A pressure difference appears on both sides of the diaphragm, and the diaphragm assembly 03 drives the diaphragm to move towards the valve housing 01 direction, so that the diaphragm seals and blocks the gas. When the gas is supplied normally, the air pressure on the side of the diaphragm close to the fixedly connected side of the valve housing 01 increases, and its air pressure is higher than the air pressure chamber on the side of the diaphragm close to the fixedly connected side of the valve cover 02 and conducting to the outside. The diaphragm maintains elastic deformation under the action of the pressure difference, and the gas passage maintains the opening degree to maintain normal gas supply.

[0112] The valve housing 01 includes a conducting part 011, a connecting part 012 and an extending part 013. The conducting part 011, the connecting part 012 and the extending part 013 are integrally formed or fixedly connected in sequence. The outer wall of the connecting part 012 of the valve housing 01 is hermetically and fixedly connected to the gas valve pipeline, and the other side is connected to the diaphragm through the diaphragm assembly 03. In this structure, in order to ensure the normal flow of gas, a conducting groove 1 is opened through the outer wall of the conducting part 011, and the conducting groove 1 can enable the gas to enter the gas valve pipeline from one end through the conducting groove 1. A driving mechanism 2 is connected to the extending part 013 of the valve housing 01, and the driving mechanism 2 can drive the diaphragm assembly away from the valve housing 01, so as to enable the gas to flow, and the driving mechanism 2 can automatically reset after driving the diaphragm.

[0113] In order to increase the gas flow rate of the valve housing 01 and fix the valve housing 01 to the diaphragm and the valve cover 02, a threaded connection hole 3 is opened at the end of the conducting part 011. By providing multiple conducting grooves 1 on the edge of the valve housing 01, the gas flow rate when the gas passes through the valve housing 01 is not affected under the existing structure. The threaded connection hole 3 is internally provided with internal threads, and through the threaded connection hole 3, the valve cover, the fixing shell 41 and the diaphragm are fixedly connected by threads, so that the diaphragm can be tightly fixed by the valve housing 01 and the valve cover.

[0114] While stabilizing the gas flow rate, to ensure the firm connection between the valve housing 01 and the valve cover 02 and the diaphragm, there are four conduction grooves 1 provided, and four threaded connection holes 3 are provided. The distance between adjacent conduction grooves 1 is greater than the diameter of the threaded connection holes 3, and the threaded connection holes 3 are provided at the middle position between adjacent conduction grooves 1. By setting four conduction grooves 1 and four threaded connection holes 3, and providing the threaded connection holes 3 at the middle position between adjacent conduction grooves 1, it not only increases the gas flow path but also enhances the firm connection between the valve housing 01 and the valve cover 02 and the diaphragm through the symmetrically distributed threaded connection holes 3. To enable the diaphragm assembly 03 to be supported within the valve housing 01 and ensure the stability of its movement trajectory, a support frame 4 protrudes from the middle of the connection part 012, and the support frame 4 supports the diaphragm assembly. The support frame 4 inside the valve housing 01 can provide a supporting force for the diaphragm assembly connected inside the valve housing 01, ensuring that the movement trajectories of the diaphragm assembly are the same when the diaphragm is opened and sealed, and ensuring that the diaphragm can abut against the valve housing 01 for sealing each time the gas is blocked.

[0115] To ensure that the gas can pass through the support ring 42, the support frame 4 includes: a support rod 41 and a support ring 42. The outer wall of the support ring 42 is integrally formed with the support rod 41, and the other end of the support rod 41 is integrally formed or fixedly connected to the inner wall of the connection part 012, and the diaphragm assembly passes through the support ring 42. The outer wall of the support ring 42 is integrally connected to the support rod 41 and is integrally formed with the inside of the connection part. The support rods 41 are distributed in a circumferential circle on the outer wall of the support ring 42, and there is a hollow structure between the support rods 41. The multiple hollow structures ensure the normal flow of gas. To ensure the movement of the driving mechanism 2 within the valve housing 01, a hinge groove 5 is provided on the upper side of the extension part 013, and the driving mechanism 2 is hinged inside the extension part 013. So that the hinged part of the driving mechanism 2 can be embedded inside the valve housing 01 and extend along the hinge groove 5. The provision of the hinge groove 5 prevents the driving mechanism 2 from interfering with the inner wall of the valve housing 01 during movement and ensures rotation within a set angle.

[0116] In order to enable the drive mechanism 2 to drive the diaphragm assembly, the drive mechanism 2 includes: a hinged rod 21, an upper folding part 22 and a lower folding part 23, and the upper folding part 22 and the lower folding part 23 are integrally formed into a bent structure. Due to the specific shapes of the upper folding part 22 and the lower folding part 23 of the drive mechanism 2, the drive mechanism 2 can be arranged inside the extension part 013, increasing the compactness between the structures. An articulated hole 6 is formed at the upper end of the lower folding part 23, and the articulated rod 21 passes through the articulated hole 6. Both ends of the articulated rod 21 are rotatably connected to the inner wall of the extension part 013. When the lower folding part 23 rotates through the articulated rod 21, it abuts against the end face of the diaphragm assembly and rotates, so that the rotational force drives the diaphragm assembly away from the drive mechanism 2 and makes it move axially. In order to further limit the lower folding part 23, guide ridges 7 protrude from the inner wall of the extension part 013 at both positions of the lower folding part 23. The guide prism 7 enables the lower folding part 23 to always maintain movement in the same vertical plane when rotating through the articulated rod. In order to improve the adaptability between the valve body and the gas passage 0001, the outer diameters of the conduction part 011, the connection part 012 and the extension part 013 decrease in sequence. This makes it convenient to install with the conduction part 22.

[0117] In order to form an independent cavity between the valve cover 02 and the diaphragm after fixed connection, the cover body 021 includes: a connection ring 0211, a pressing plate 0212 and a sealing cylinder 0213. One end of the sealing cylinder 0213 is open, and the pressing plate 0212 is integrally formed at the opening of the sealing cylinder 0213. The pressing plate 0212 extends outward from the sealing cylinder 0213, and the connection ring 0211 is integrally formed outside the pressing plate 0212. Through the integral formation of the connection ring 0211, the pressing plate 0212 and the sealing cylinder 0213, and due to the specific shape of the annular opening at one end of the sealing cylinder 0213, an independent cavity is formed inside the sealing cylinder 0213 between the valve cover 02 inside the valve body and the diaphragm. Through the air pressure cavity communicating with the outside, the diaphragm moves under the pressure difference when there is a slight leak in the gas passage 0001. When there is a pressure fluctuation caused by a slight leak in the gas supply system, the diaphragm can close the gas passage in the case of a slight gas leak. In order to ensure the connection strength of the valve cover 02, the connection ring 0211 and the pressing plate 0212 are integrally formed through an extension cylinder 8, and the extension cylinder 8 extends away from the sealing cylinder 0213, increasing the space inside the sealing cylinder 0213. In order to further improve the sealing performance, a sealing groove 9 is formed between the extension cylinder 8 and the pressing plate 0212, and a sealing ring 10 is arranged inside the sealing groove 9. Installing the sealing ring 10 in the sealing groove 1 can closely fit the surface of the connection part, and the sealing ring can maintain a good sealing state by virtue of its elasticity.

[0118] To enable the interior of the valve body to communicate with the external atmospheric pressure, the conducting member 022 includes: a first sealing portion 0221, an elongation portion 0222, and a second sealing portion 0223. The first sealing portion 0221, the elongation portion 0222, and the second sealing portion 0223 are integrally formed in sequence. The first sealing portion 0221 is sealingly connected to the sealing cylinder 0213, and the second sealing portion 0223 is sealingly connected to the gas passage 0001. In order to connect the first sealing portion 0221, the valve cover 02 is provided with a threaded hole on the side wall of its sealing cylinder 0213. The first sealing portion 0221 and the second sealing portion 0223 respectively seal the gas passage 0001 and the valve cover 02. A guiding through-hole 11 is opened through the centers of the first sealing portion 0221, the elongation portion 0222, and the second sealing portion 0223. Ensure that gas can enter the elongation portion 0222 from the guiding through-hole 11 on one side of the first sealing portion 0221 and flow out from the guiding through-hole 11 on one side of the second sealing portion 0223.

[0119] To facilitate the fixed connection of the conducting member 022 to the valve cover 02, the outer diameters of the first sealing portion 0221, the elongation portion 0222, and the second sealing portion 0223 increase in sequence. The stepped design with an increasing outer diameter makes the assembly process of the conducting member 022 and the valve cover 02 more reasonable. Specifically, the stepped shape at the connection of the elongation portion 0222 and the limiting plate 0224 enables the limiting plate 0224 to limit the elongation portion 0222 after the elongation portion 0222 extends into the opening of the gas passage 0001. Sealing external threads 12 are provided on the outsides of the first sealing portion 0221 and the second sealing portion 0223, and the sealing external threads 12 are threadedly connected and fixed to the valve sealing internal threads 13. Similarly, the stepped shape at the connection of the elongation portion 0222 and the first sealing portion 0221 further limits the elongation portion 0222. Thus, when the conducting member 4 is rotated, the threaded structures of the first sealing portion 0221 and the second sealing portion 0223 can simultaneously perform threaded sealing connections on the gas passage 0001 and the valve cover 02.

[0120] To further limit and fix the conducting member 022, the conducting member 022 further includes: a limiting plate 0224. The limiting plate 0224 is integrally formed at one end of the second sealing portion 0223 away from the elongation portion 0222, and the guiding through-hole 11 penetrates through the limiting plate 0224. The integral molding design of the limiting plate 0224 and the conducting member 022 prevents the axial loosening of the conducting member 022 caused by the loosening of its threaded connection due to long-term use through mechanical limitation.

[0121] To facilitate the external installation of the conducting member 022, a slotted crosshead is provided on one side of the limiting plate 0224 away from the second sealing portion 0223. The slotted crosshead design of the limiting plate 0224 is adapted to standard tools, such as a flat-blade screwdriver, making the installation and disassembly of the conducting member 022 more convenient.

[0122] The diaphragm assembly 03 includes a connecting ring 031, a resilient portion 032, and a sealing portion 033. The resilient portion 032 is in an open shape. The connecting ring 031 is integrally formed at the edge of the resilient portion 032, and the sealing portion 033 is fixedly connected to the center of the resilient portion 032. To enable the diaphragm to perform a sealing action, the resilient portion 032 is in an open shape, providing a larger fitting area when undergoing elastic deformation, ensuring the sealing effect. The sealing portion 033 is fixedly connected to the resilient portion 032, and the sealing portion 033 is cylindrical.

[0123] When the gas system is operating normally, the blocking side is inside the gas passage 0001 on the side close to the movable component 142. Gas is normally supplied, and the gas pressure on the blocking side is higher than the pressure of the externally connected air pressure chamber. The diaphragm is driven by the diaphragm driving structure 3 to overcome the magnetic attraction of the driving magnet 1424 and the elastic force of the diaphragm itself, and opens towards the air pressure chamber side. Then the gas flows from the opening of the diaphragm to the blocking side. At this time, the diaphragm driving structure 3 resets. Due to the gas pressure on the blocking side being higher than the pressure of the air pressure chamber on the other side of the diaphragm connected to the outside, the diaphragm maintains an elastically deformed state. The gas passage maintains its opening degree, and at this time, the diaphragm is in an open state.

[0124] When a slight leakage occurs, the gas pressure on the blocking side decreases, the pressure on the side of the diaphragm close to the valve housing 01 decreases, while the pressure of the air pressure chamber connected to the outside through the conducting member 022 remains unchanged. Therefore, its pressure is less than the pressure of the pressure chamber on the other side of the diaphragm with a stable internal atmospheric pressure on the side of the valve cover 02, or the internal gas pressure of the pipeline is equal to the pressure of the pressure chamber as the gas leaks outwards. At this time, the pressure difference between the two sides of the diaphragm changes. Coupled with the elastic force of the diaphragm itself and the magnetic attraction of the driving magnet 1424, the diaphragm returns to its initial position, releasing the elastic deformation, and the valve passage closes, preventing the gas from flowing continuously. Further explanation is that in the case of slight leakage, the air pressures on both sides of the diaphragm are equal. At this time, the elastic deformation in the open state of the diaphragm cannot be maintained, and the release of the elastic deformation drives the diaphragm to reset. Coupled with the magnetic attraction generated by the driving magnet 1424 towards the fixed housing 141 direction, the movable component 142 further drives the diaphragm to reset, and the sealing portion 033 closely fits at the blocking position on the valve housing 01, blocking the gas flow. At this time, the diaphragm is in a closed state.

[0125] To enable the sealing portion 033 of the diaphragm to be accurately positioned when the diaphragm opens and closes, thereby improving the sealing effect, one end of the sealing portion 033 is integrally formed with the resilient portion 032, and a sealing convex ring 0331 protrudes from the other end of the sealing portion 033. The cross-section of the sealing convex ring 0331 includes a semi-circle, an ellipse, and other irregular shapes. In this application, a semi-circular structure is preferably used.

[0126] In order to further enable the sealing part 033 to increase the size of the ventilation channel and reduce the area affected by the gas pressure, a sealing convex ring 0331 is provided at the edge of the sealing part 033. The sealing convex ring 0331 is located at the edge of the sealing part 033 and extends along the circumferential direction of the sealing part 033. Due to the structure at the connection between the sealing convex ring 0331 and the sealing part 033, the channel space for gas flow can be further increased when the diaphragm is in the open state. When gas enters from the internal conduction groove of the valve housing, the size and the arc-shaped edge of the sealing convex ring 0331 can also reduce the area affected by the gas pressure, increase the force difference between the two sides, enable the diaphragm to fit more tightly on the housing in the closed state, enhance the sealing performance, and reduce the possibility of gas leakage.

[0127] The diaphragm assembly 03 includes the above-mentioned diaphragm. To enable the diaphragm to open in the closed state, it further includes: a driving assembly 14, which is fixedly connected along the center of the sealing part 033. The driving assembly 14 transmits the external driving force through the diaphragm driving structure 3, overcomes the elastic resistance of the rebounding part 032, drives the axial displacement of the sealing part 033, and realizes the active opening control of the diaphragm.

[0128] To fix the position of the diaphragm and thus realize its function of blocking gas, the driving assembly 14 includes: a fixed shell 141 and a movable assembly 142. The edge of the fixed shell 141 is tightly sealed and connected to the connecting ring 031. The connecting ring 031 is clamped between the fixed shell 141 and the valve housing 01 to ensure that the entire diaphragm assembly is fixed in the valve body. A through hole 1411 is provided in the center of the fixed shell 141 to ensure that when the diaphragm is in the open state and the sealing part 033 is away from the through hole 41, gas can flow. The movable assembly 142 is arranged through the through hole, and the through hole 1411 allows the axial movement of the movable assembly 142. The movable assembly 142 is fixedly connected to the sealing part 033.

[0129] In order to keep the diaphragm in an open state when it is opened and prevent it from being closed by external forces, the movable component 142 includes a driving rod 1421, a threaded rod 1422, a connecting cylinder 1423, and a driving magnet 1424. One end of the threaded rod 1422 is integrally formed with the driving rod 1421, and the other end of the threaded rod 1422 is threadedly connected to the connecting cylinder 1423. When the driving rod 1421 is pushed by an external force, the threaded rod 1422 drives the diaphragm and the connecting cylinder 1423 to axially move towards the valve cover 02, and the other end of the connecting cylinder 1423 is fixedly connected to the driving magnet 1424. A through hole is provided in the center of the sealing part 2. The threaded rod 1422 passes through the center of the sealing part 033 and is fixedly connected to the sealing part 033. The length of the threaded rod 1422 is greater than the length of the through hole of the sealing part 033. After passing through the sealing part 033, the part extending from the inside of the sealing part 033 is threadedly connected to the connecting cylinder 1423, and the connecting cylinder 1423 passes through the through hole 1411. In order to ensure the uniform distribution of the pressure of the driving rod 1421 on the sealing part 033 and prevent the damage of the transition connection between the through hole of the diaphragm and the driving rod 1421 and the threaded rod 1422 due to pressure concentration, thereby affecting the sealing performance, the diameter of the driving rod 1421 is increased so that its end forms a stable contact surface with the sealing part 033, evenly dispersing the pressure and preventing local pressure concentration. In order to fix the driving magnet 1424, the driving magnet 1424 is a magnetic ring, and an open hole is provided in the center of the magnetic ring. A screw 15 is arranged through the open hole. The screw 15 passes through the open hole in the center of the magnetic ring and presses the connecting cylinder 1423 to realize the fixation of the driving magnet 1424.

[0130] The valve body opening structure 04 includes: a pressing member 041 and a resilient member 042. The pressing member 041 is fixedly connected to the outer wall of the gas passage 0001 in a sealed manner, and the resilient member 042 is fixedly connected to the diaphragm driving structure 16. The lower end of the pressing member 041 extends into the interior of the gas passage 0001. To enable manual opening of the diaphragm, the lower end of the pressing member 041 pushes the diaphragm driving structure 16 to rotate counterclockwise, and the resilient member 042 pushes the diaphragm driving structure 16 to rotate clockwise to reset. When the diaphragm closes due to problems such as minor leakage or other reasons, the air pressure inside the valve body is relatively less than or equal to the external air pressure. Just press the pressing member 041 of the valve body opening structure 04, so that the pressing member 041 pushes the diaphragm driving structure 16, and then drives the opening of the diaphragm sealing part. When the gas flows normally, the thrust generated by the gas pressure will cause the diaphragm to elastically deform and remain in the open position. At this time, the gas pressure can maintain a certain level, sufficient to overcome the elastic force of the diaphragm itself or the tiny resistance generated by other factors. Then release the pressing member 041, and the pressing member 041 resets through the resilient member 042 and separates from the diaphragm driving structure 16 to ensure normal pressing next time. Gas is dangerous. To prevent safety accidents caused by accidental opening, the gas valve needs to avoid accidental opening of the valve caused by external factors or non-human factors. The pressing member 041 can overcome the sealing resistance of the diaphragm. Since there is a certain resistance when the diaphragm is in the sealed blocking state, including the friction and resilience at its own sealing place, etc. The pressing member 041 can provide sufficient force to push the diaphragm through mechanical transmission, so that it overcomes the sealing resistance and realizes the opening of the valve seat.

[0131] To ensure that the pressing member 041 can drive the diaphragm driving structure 16, the pressing member 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 member 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 passage 0001. The pressing rod 0413 extends into the interior of the gas passage 0001 along the fixing cylinder 0412, and the lower end of the pressing rod 0413 drives the diaphragm driving structure 16. The pressing cap 0411 is sleeved on the upper end of the fixing cylinder 0412. The pressing cap 0411 is fixedly connected to one end of the pressing rod 0413. The pressing rod 0413 is inside the fixing cylinder 0412. When the pressing cap 0411 is pressed, the inner diameter of the skirt of the pressing cap 0411 is greater than the outer diameter of the connection between the fixing cylinder and the pressing cap 0411. When the pressing cap 0411 is pressed, the inner wall of the skirt of the pressing cap 0411 fits against the outer wall of the fixing cylinder 13 and moves downward, simultaneously driving the pressing rod 0413 to move downward, so that the end of the pressing rod 0413 away from the pressing cap 0411 touches the diaphragm driving structure 16. To limit the moving distance of the pressing rod 0413, when the inner wall of the top of the pressing cap 0411 touches the end of the pressing rod 12 or the end of the skirt of the pressing cap 0411 touches the stepped structure of the fixing cylinder 0412, the pressing cap 0411 cannot be pressed downward continuously. The fixing cylinder 0412 is a cylinder, and an axial through-hole is provided along the axis, penetrating both end faces of the fixing cylinder 0412. To further limit the pressing of the pressing cap 0411, a hexagonal nut is threadedly connected to the outer wall of the fixing cylinder 0412, or a hexagonal protrusion is integrally formed on the outer wall. The protrusion ranges around the circumference of the fixing cylinder 0412 for one circle. The part of the fixing cylinder 0412 below the hexagonal nut or the hexagonal protrusion is provided with threads and is threadedly connected to the threaded hole opened in the gas passage 0001. The connection between the hexagonal nut or the hexagonal protrusion and the outer wall of the fixing cylinder 0412 is stepped and is matched with the connection port of the gas passage 0001.

[0132] The upper part of the guiding convex ring 17 inside the fixing cylinder 0412 is the upper side inside the fixing cylinder 0412, and the lower part of the guiding convex ring 17 inside the fixing cylinder 0412 is the lower side inside the fixing cylinder 0412. To facilitate the installation of the elastic member 042, the inner diameter of the upper side of the fixing cylinder 0412 is greater than the inner diameter of the lower side of the fixing cylinder 0412.

[0133] To improve the sealing performance of the valve body opening structure 04, a guiding convex ring 17 protrudes inward from the inside of the fixing cylinder 0412, and a sealing ring 18 is fixedly connected to the upper side and / or the lower side of the guiding convex ring 17. The guiding convex ring 17 protrudes around the inner wall of the fixing cylinder 0412 for one circle along the axis and extends towards the axis direction of the fixing cylinder 0412. Finally, a straight through-hole is formed in the center of the guiding convex ring 17, and the inner diameter of the straight through-hole is greater than the inner diameter of the pressing rod, so that the end of the pressing rod 0413 can pass through.

[0134] 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 is threadedly connected to the pressing cap 0411. The pressing head 04133 is provided on the lower side of the guiding convex ring 17, and the pressing head 04133 drives the diaphragm driving structure 16. The extension rod 04132 passes through the central through hole of the guiding convex ring 17. The outer diameter of the pressing head 04133 is larger than the outer diameter of the extension rod 04132. The inner diameter of the lower side of the fixing cylinder 0412 is the same as the inner diameter of the pressing head 04133, enabling the outer wall of the pressing head 04133 to slide on the inner wall of the lower side of the fixing cylinder 0412. When the pressing cap 0411 is pressed down, it drives the pressing rod 0413 to move. The pressing head 04133 touches the diaphragm driving structure 16 and presses it down. The diaphragm driving structure 16 rotates during the pressing down process of the pressing head 04133 through a hinge rod or a torsion spring, thereby driving the diaphragm to open.

[0135] In order to further limit the pressing rod 0413, the outer diameter of the pressing head 04133 is larger than the inner diameter of the guiding convex ring 17. The diameter of the through hole of the guiding convex ring 17 is smaller than the diameter of the pressing head 04133. When the pressing member 041 resets, the elastic member 042 generates a resilience force, and the pressing cap 0411 moves away from the gas passage 0001. When the pressing head 04133 moves to the position of the guiding convex ring 17, the pressing head 04133 touches the lower end face of the guiding convex ring 17 and stops moving, thereby limiting the pressing head 04133. In order to connect the pressing cap 0411 with the threaded head 04131, the pressing cap 0411 includes: a cap body 04111 and a connecting head 04112. The connecting head 04112 protrudes inside the cap body 04111. An internal thread is provided inside the connecting head 04112, and the threaded head 04131 is threadedly connected to the connecting head 04112. The cap body 04111 and the connecting head 04112 are integrally formed, enhancing the connection strength between the pressing cap 0411 and the pressing rod 0413.

[0136] In order to fix the elastic member 042 and endow the pressing member 041 with a pressing and resilience function. The elastic member 042 is a pressing spring. The pressing spring is sleeved on the outer wall of the extension 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 guiding convex ring 17. When the pressing cap 0411 is pressed down, the upper end of the pressing spring is subjected to a downward force and undergoes elastic deformation. When the pressing down stops and the pressing cap 0411 is released, under the action of the elastic force, the pressing spring returns to its initial position. The compression and resilience of the pressing spring provide an automatic reset function for the pressing member 0413. The pressing spring is used in cooperation with a permanent magnet.

[0137] In one embodiment, in order to reset the diaphragm driving structure 16 and the pressing member 041, a torsion spring is provided between the diaphragm driving structure 16 and the hinge groove 5 of the valve housing. By pressing down the pressing member 041, the pressing head 04133 touches the upper folding portion 22 of the diaphragm driving structure 16, applying a downward pressure thereto, and pushing the diaphragm driving structure 16 to rotate counterclockwise. The torsion arms of the torsion spring generate elastic torsional deformation due to the force generated by the rotation of the diaphragm driving structure 16. When the pressing of the pressing member 041 stops, the torsion spring stops torsional deformation and returns to its initial shape, and the diaphragm driving structure 16 rotates counterclockwise to reset. At the same time, the pressing head 04133 that abuts against the upper folding portion 22 driven by the diaphragm driving structure moves upward, causing the pressing member 041 to also reset.

[0138] In another embodiment, in order to reset the diaphragm driving structure 16, the elastic member 042 is a return spring. A return spring fixing member is provided on the inner wall of the gas passage 0001 below the diaphragm driving structure 16. The fixing member is fixedly connected to the inner wall of the gas passage 0001 or fixedly connected by a thread. One end of the return spring is sleeved on the fixing member and abuts against the platform surface where the fixing member contacts the spring, and the other end of the spring abuts against the spring fixing groove formed in the diaphragm driving structure 16. When the pressing member 041 is pressed down, the diaphragm driving structure generates a rotational force through the hinge rod and rotates counterclockwise. The spring groove in contact with the spring also deforms downward when the diaphragm driving structure 16 rotates. When the pressing member 041 is released, the return spring releases elastic potential energy. Before the spring restores elastic deformation, the diaphragm driving structure 16 resets, pushing the pressing head 04133 upward, so that the pressing member 041 also resets through its return spring.

[0139] In another embodiment, in addition to the above-described structure of the resilient member 042 and the pressing member 041, another structure can be used to press and reset the diaphragm driving structure 16. The resilient member 042 is a permanent magnet, which is fixedly connected to the diaphragm driving structure 16. The pressing head 04133 is made of a magnetic material, and the pressing head 04133 adsorbs the permanent magnet to drive the diaphragm driving structure 16 to rotate clockwise. In this way, the permanent magnet is in the annular groove formed in the diaphragm driving structure 16 and below the pressing head 04133, and the pressing head 04133 is perpendicular to the permanent magnet. The end of the pressing head 04133 is made of a magnetic material and has a different magnetic pole from the permanent magnet to ensure that the two components can be adsorbed together. When the pressing member 041 is pressed down, the pressing head 04133 touches the diaphragm driving structure 16, and the permanent magnet of the diaphragm driving structure 16 is adsorbed to the magnetic material of the pressing head 04133. The diaphragm driving structure 16 rotates through the hinge rod to push the diaphragm assembly to move and open the diaphragm. When the pressing member 1 is elastically reset by the pressing spring, the pressing head 04133 is adsorbed to the permanent magnet to drive the diaphragm driving structure 16 to reset. When the diaphragm driving structure 16 rotates to the lower end face of the fixed cylinder 0412, the diaphragm driving structure 16 touches the lower end face of the fixed cylinder 0412, and the permanent magnet is separated from the pressing head 04133.

[0140] As shown in Figures 15 - 17 the self-closing valve includes a gas pipeline micro-leakage automatic closing valve and also includes a self-closing valve housing. The gas pipeline micro-leakage automatic closing valve is fixedly connected inside the self-closing valve housing. The gas pipeline micro-leakage automatic closing valve is inside the self-closing valve body and can quickly block the gas through the diaphragm assembly 03 when detecting micro-leakage. Both sides of the diaphragm assembly 03 are tightly sealed and connected by the valve housing 01 and the valve cover 02. The valve housing 01 is fixedly connected inside the self-closing valve housing. The inside of the valve housing 01 conducts the gas pipeline. The middle part of the valve housing 01 is close to the sealed gas pipeline blocking through the diaphragm assembly 03, or the middle part of the valve housing 01 conducts the gas pipeline away from the valve housing 01 through the diaphragm assembly 03.

[0141] The above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention.

Claims

1. An automatic shut-off valve for micro-leaks in gas pipelines, characterized in that, Comprising: A valve housing (01), a valve cover (02), a diaphragm assembly (03) and a valve body opening structure (04). The diaphragm assembly (03) is tightly connected between the valve housing (01) and the valve cover (02). The other end of the valve housing (01) is provided with the valve body opening structure (04), so that the valve body opening structure (04) pushes the diaphragm assembly (03) to make the gas in the valve housing (01) conduct or close. The valve cover (02) includes: a cover body (021) and a conducting member (022). The cover body (021) is installed inside the gas passage (0001). The cover body (021) conducts the outside of the gas valve of the gas passage (0001) through the conducting member (022). One end outer wall of the conducting member (022) is hermetically connected to the cover body (021), and the other end of the conducting member (021) is hermetically connected to the gas passage (0001).

2. The automatic shut-off valve for micro-leakage of gas pipelines according to claim 1, characterized in that, The valve housing includes: a conducting portion (011), a connecting portion (012) and an extending portion (013). The conducting portion (011), the connecting portion (012) and the extending portion (013) are integrally formed or fixedly connected in sequence. A conducting groove (1) is opened through the outer wall of the conducting portion (011). The outer wall of the connecting portion (012) is hermetically and fixedly connected to the gas valve pipeline. The extending portion (013) is connected with a driving mechanism (2) to make the driving mechanism drive the diaphragm assembly 03. A plurality of the conducting grooves (1) are opened. At the position between adjacent conducting grooves (1), a threaded connection hole (3) is opened at the end of the conducting portion (011). Four conducting grooves (1) are opened, and four threaded connection holes (3) are opened. The distance between adjacent conducting grooves (1) is greater than the diameter of the threaded connection hole (3), and the threaded connection hole (3) is opened at the middle position between adjacent conducting grooves (1). A support frame (4) is convexly provided in the middle of the connecting portion (012), and the support frame (4) supports the diaphragm assembly (03). The support frame (4) includes: a support rod (41) and a support ring (42). The support rod (41) is integrally formed on the outer wall of the support ring (42). The other end of the support rod (41) is integrally formed or fixedly connected to the inner wall of the connecting portion (12). The diaphragm assembly passes through the support ring (42).

3. The automatic shut-off valve for micro-leakage of gas pipelines according to claim 2, characterized in that, A hinge groove (5) is opened on the upper side of the extending portion (13). The driving mechanism (2) is hinged inside the extending portion (013) and extends out at the hinge groove (5). The driving mechanism (2) includes: a hinge rod (21), an upper folding portion (22) and a lower folding portion (23). The upper folding portion (22) and the lower folding portion (23) are integrally formed into a bent structure. A hinge hole (6) is opened at the upper end of the lower folding portion (23). The hinge rod (21) passes through the hinge hole (6). Both ends of the hinge rod (21) are rotatably connected to the inner wall of the extending portion (13). At both sides of the lower folding portion (23), guiding convex ribs (7) are convexly provided on the inner wall of the extending portion (13). The outer diameters of the conducting part (011), the connecting part (012), and the extending part (013) decrease in sequence.

4. The automatic shut-off valve for micro-leakage of gas pipelines according to claim 1, characterized in that, The cover body (021) includes: a connecting ring (0211), a pressing plate (0212), and a sealing cylinder (0213). One end of the sealing cylinder (0213) is open, and the pressing plate (0212) is integrally formed at the opening of the sealing cylinder (0213). The pressing plate (0212) extends outward from the sealing cylinder (0213), and the connecting ring (0211) is integrally formed outside the pressing plate (0212); The connecting ring (0211) and the pressing plate (0212) are integrally formed by an extending cylinder (8), and the extending cylinder (8) extends away from the sealing cylinder (0213); A sealing groove (9) is formed between the extending cylinder (8) and the pressing plate (0212), and a sealing ring (10) is arranged inside the sealing groove (9).

5. The automatic shut-off valve for micro-leakage of gas pipelines according to claim 4, characterized in that, The conducting member (022) includes: a first sealing part (0221), an elongating part (0222), and a second sealing part (0223). The first sealing part (0221), the elongating part (0222), and the second sealing part (0223) are integrally formed in sequence at one time. The first sealing part (0221) is sealingly connected to the sealing cylinder (0213), and the second sealing part (0223) is sealingly connected to the gas valve pipeline; A guiding through hole (11) is formed through the centers of the first sealing part (0221), the elongating part (0222), and the second sealing part (0223); The outer diameters of the first sealing part (0221), the elongating part (0222), and the second sealing part (0223) increase in sequence; Sealing external threads (12) are formed outside the first sealing part (0221) and the second sealing part (0223), and sealing internal threads (13) are formed through the side wall of the sealing cylinder (0213). The sealing external threads (12) of the first sealing part (0221) are sealingly connected to the sealing internal threads (13); The conducting member (022) further includes: a limiting plate (0224). The limiting plate (0224) is integrally formed at one end of the second sealing part (0223) away from the elongating part (0222), and the guiding through hole (11) passes through the limiting plate (0224); A slotted hole is formed on one side of the limiting plate (0224) away from the second sealing part (0223).

6. The automatic shut-off valve for micro-leakage of gas pipelines according to claim 1, characterized in that The diaphragm of the diaphragm assembly includes (03): a connecting ring (031), a rebounding part (032), and a sealing part (033). The rebounding part (032) is in an open shape, the connecting ring (0311) is integrally formed at the edge of the rebounding part (032), and the sealing part (033) is fixedly connected to the center of the rebounding part (032); The sealing part (033) is in a cylindrical shape; One end of the sealing part (033) is integrally formed with the rebounding part (032), and a sealing convex ring (0331) protrudes from the other end of the sealing part (033); The sealing convex ring (0331) is provided at the edge of the sealing part (033); The diaphragm assembly further includes: a driving assembly (14), and the driving assembly (14) is fixedly connected along the center of the sealing part (033); The driving assembly (14) includes: a fixed shell (141) and a movable assembly (142). The edge of the fixed shell (141) is tightly pressed and sealed with the connecting ring (031). A through hole (1411) is provided at the center of the fixed shell (141), and the movable assembly (142) is arranged through the through hole (1411); The movable assembly (142) is fixedly connected to the sealing part (033); The movable assembly (142) includes: a driving rod (1421), a threaded rod (1422), a connecting cylinder (1423) and a driving magnet (1424); one end of the threaded rod (1422) is integrally formed with the driving rod (1421), the other end of the threaded rod (1422) is threadedly connected to the connecting cylinder (1423), and the other end of the connecting cylinder (1423) is fixedly connected to the driving magnet (1424); The threaded rod (1422) passes through the center of the sealing part (033) and is fixedly connected to the sealing part (033); The connecting cylinder (1423) passes through the through hole (1411); The diameter of the driving rod (1421) is larger than that of the threaded rod (1422), and the driving rod (1421) is pressed against the end of the sealing part (033); The driving magnet (1424) is a magnetic ring. An open hole is provided at the center of the magnetic ring. A screw (15) is arranged through the open hole, and the screw (15) presses and connects the magnetic ring to the end of the connecting cylinder (1424).

7. The automatic shut-off valve for micro-leakage of gas pipelines according to claim 1, characterized in that The valve body opening structure (04) includes: a pressing part (041) and a rebounding part (042). The pressing part (041) is hermetically and fixedly connected to the outer wall of the gas pipeline. The rebounding part (042) is fixedly connected to the diaphragm driving structure (16). The lower end of the pressing part (041) extends into the interior of the gas pipeline. The lower end of the pressing part (041) pushes the diaphragm driving structure (16) to rotate counterclockwise, and the rebounding part (042) pushes the diaphragm driving structure (16) to rotate clockwise; The pressing part (041) includes: a pressing cap (0411), a fixed cylinder (0412) and a pressing rod (0413). The pressing cap (0411) is fixedly connected to the pressing part (041). The pressing cap (0411) is sleeved on the upper end of the fixed cylinder (0412). The lower end of the fixed cylinder (0412) is fixedly connected to the inner wall of the gas pipeline. The pressing rod (0413) extends into the interior of the gas pipeline along the fixed cylinder (0412), and the lower end of the pressing rod (0413) drives the diaphragm driving structure (16); A guiding convex ring (17) protrudes inwardly inside the fixed cylinder (0412), and a sealing ring (18) is fixedly connected to the upper side and / or the lower side of the guiding convex ring (17), and the outer wall of the pressing rod (0413) is sealed with the sealing ring (18); 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) is threadedly connected to the pressing cap (0411). The pressing head (04133) is provided on the lower side of the guiding convex ring (17), and the pressing head (04133) drives the diaphragm driving structure (16). The outer diameter of the pressing head (04133) is greater than the inner diameter of the guiding convex ring (17). The pressing cap (0411) includes: a cap body (04111) and a connecting head (04112). The connecting head (04112) protrudes inside the cap body (04111). An internal thread is provided inside the connecting head (04112), and the threaded head (04131) is threadedly connected to the connecting head (04112).

8. The automatic shut-off valve for micro-leakage of gas pipelines according to claim 7, characterized in that, The elastic member (042) is a compression spring. The compression spring is sleeved on the outer wall of the extension rod (04132). The upper end of the compression spring abuts against the inner wall of the pressing cap (0411), and the lower end of the compression spring abuts against the upper side of the guiding convex ring (17). Or the elastic member (042) is a return spring. The lower end of the return spring is fixedly connected to the inner wall of the gas pipeline, and the upper end of the return spring abuts against the lower side of the diaphragm driving structure (16) and pushes the diaphragm driving structure (16) to rotate clockwise. Or the elastic member (042) is a permanent magnet. The permanent magnet is fixedly connected to the diaphragm driving structure (16). The pressing head (04133) is made of a magnetic material, and the pressing head (04133) adsorbs the permanent magnet to drive the diaphragm driving structure (16) to rotate clockwise.

9. A self-closing valve, characterized in that: The gas pipeline micro-leakage automatic shut-off valve according to any one of claims 1-8 further includes a self-closing valve housing (05), and the gas pipeline micro-leakage automatic shut-off valve is fixedly connected inside the self-closing valve housing (05).

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