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

Abstract

The utility model 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 utility model relates to gas pipeline safety equipment structure design technical field especially relates to a gas pipeline microleakage automatic closing valve and its self closing valve. BACKGROUND

[0002] Gas is one of important energy, is widely used in resident life and industrial production. However, gas leakage can cause fire, explosion and other serious safety accidents, therefore the safety protection equipment of gas pipeline is particularly important. But in practical application, pipeline interface, valve and other parts are prone to microleakage phenomenon because of material aging, vibration or installation defects and other factors. Although there are various gas automatic closing valves in prior art, but its microleakage detection response speed, structure stability and long-term sealing performance still have significant deficiencies.

[0003] Firstly, the existing valve structure is complex, so that the installation and maintenance process is tedious, secondly, the closing valve in prior art cannot realize automatic closing when microleakage occurs. Lead to the valve cannot respond quickly when microleakage occurs. In addition, the existing gas valve generally adopts mechanical spring type or electronic induction type closing device, which causes insufficient response speed. At the same time, the electronic valve may fail under power failure or extreme conditions.

[0004] Therefore, the existing gas valve has redundant structure, so that it cannot realize closing when microleakage occurs in gas pipeline. It is difficult to realize automatic detection and automatic blocking of gas pipeline microleakage. UTILITY MODEL CONTENTS

[0005] Therefore, the main purpose of the utility model is to provide a gas pipeline microleakage automatic closing valve and its self closing valve. Can solve the redundant structure of gas valve in prior art, short sealing life and drive failure, the closing valve is easy to close when subjected to external force, in addition, can solve the problem that the valve is opened or the diaphragm cannot be automatically opened due to excessive sealing resistance in prior art because of vibration or pressure fluctuation, in addition, solve the automatic reset problem of diaphragm driving structure after pressing the pressing piece.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] The gas pipeline microleakage automatic closing valve, including: valve shell, valve cover, diaphragm assembly and valve body opening structure, the valve shell and the valve cover are connected tightly between the diaphragm assembly, the other end of the valve shell is provided with valve body opening structure, the valve body opening structure pushes the diaphragm assembly to make the valve shell gas conduction or closing;

[0008] In a preferred embodiment, the valve cover comprises a cover body and a guide, the cover body is installed inside the gas passage, the cover body is guided outside the gas passage valve through the guide, one end of the guide is sealingly connected with the cover body, and the other end of the guide is sealingly connected with the gas passage.

[0009] In a preferred embodiment, the valve housing comprises a guide part, a connecting part and an extension part, the guide part, the connecting part and the extension part are sequentially integrally formed or fixedly connected, a guide groove is formed through the outer wall of the guide part, the outer wall of the connecting part is sealingly and fixedly connected with the gas valve pipeline, and the extension part is connected with a driving mechanism, so that the driving mechanism drives the diaphragm assembly.

[0010] A plurality of guide grooves are formed, and a threaded connection hole is formed at the end of the guide part between adjacent guide grooves.

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

[0012] In a preferred embodiment, a support frame is protruded at the middle of the connecting part, and the support frame supports the diaphragm assembly.

[0013] In a preferred embodiment, the support frame comprises a support rod and a support ring, the support ring is integrally formed with the support rod, the other end of the support rod is integrally formed or fixedly connected with the inner wall of the connecting part, and 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 extension part, the driving mechanism is hinged inside the extension part and extends at the hinge groove.

[0015] In a preferred embodiment, the driving mechanism comprises a hinge rod, an upper folding part and a lower folding part, the upper folding part and the lower folding part are integrally formed in a bending structure, a hinge hole is formed at the upper end of the lower folding part, the hinge rod passes through the hinge hole, and the two ends of the hinge rod are rotationally connected with the inner wall of the extension part.

[0016] In a preferred embodiment, guide protrusions are protruded at the positions on both sides of the lower folding part.

[0017] In a preferred embodiment, the outer diameters of the guide part, the connecting part and the extension part sequentially decrease.

[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. The pressing plate is integrally formed at the opening of the sealing cylinder. The pressing plate extends outward from the sealing cylinder. The connecting ring is integrally formed on the outside of the pressing plate.

[0019] In a preferred embodiment, the connecting ring and the clamping plate are integrally formed by an extension cylinder, which extends away from the sealing cylinder.

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

[0021] In a preferred embodiment, the conductive element includes: a first sealing part, an elongated part, and a second sealing part, wherein the first sealing part, the elongated part, and the second sealing part are formed sequentially in one piece, the first sealing part is sealed to the sealing cylinder, and the second sealing part is sealed to the gas valve pipeline.

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

[0023] In a preferred embodiment, the outer diameters of the first sealing portion, the elongated portion, and the second sealing portion increase sequentially.

[0024] In a preferred embodiment, the first sealing part and the second sealing part are provided with external sealing threads on their exteriors, and an internal sealing thread is provided through the side wall of the sealing cylinder, wherein the external sealing thread and the internal sealing thread of the first sealing part are sealed together.

[0025] In a preferred embodiment, the conductive member further includes a limiting plate, wherein the limiting plate is integrally formed at the end of the second sealing portion away from the elongated portion, and the through hole penetrates the limiting plate;

[0026] In a preferred embodiment, a slot is formed on the side of the limiting plate away from the second sealing part.

[0027] In a preferred embodiment, the membrane of the membrane assembly includes: a connecting outer ring, a rebound portion, and a sealing portion, wherein the rebound portion is open, the edge of the rebound portion is integrally formed with the connecting outer ring, and the center of the rebound portion is fixedly connected to the sealing portion;

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

[0029] In a preferred embodiment, one end of the sealing part is integrally formed with the rebound part, and the other end of the sealing part is provided with a sealing protruding ring;

[0030] In a preferred embodiment, the sealing protruding ring is arranged at the edge of the sealing part;

[0031] In a preferred embodiment, the skin assembly further comprises a driving assembly, which is fixedly connected along the center of the sealing part;

[0032] In a preferred embodiment, the driving assembly comprises a fixed shell and a movable assembly, the edge of the fixed shell is tightly and sealingly connected with the connecting outer ring, a through hole is arranged in 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 with the sealing part;

[0034] In a preferred embodiment, the movable assembly comprises a driving rod, a threaded rod, a connecting barrel 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 with the connecting barrel, and the other end of the connecting barrel is fixedly connected with the driving magnet;

[0035] In a preferred embodiment, the threaded rod is fixedly connected with the sealing part through the center of the sealing part;

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

[0037] In a preferred embodiment, the diameter of the driving rod is greater than the diameter of the threaded rod, and the driving rod is tightly pressed at the end of the sealing part;

[0038] In a preferred embodiment, the driving magnet is a magnetic ring, an open hole is arranged in the center of the magnetic ring, a screw is arranged through the open hole, and the screw is used to tightly connect the magnetic ring to the end of the connecting barrel.

[0039] In a preferred embodiment, the valve body opening structure comprises a pressing piece and a rebound piece, the pressing piece is sealingly and fixedly connected to the outer wall of the gas pipeline, the rebound piece is fixedly connected to the skin driving structure, the lower end of the pressing piece extends into the interior of the gas pipeline, the lower end of the pressing piece pushes the skin driving structure to rotate counterclockwise, and the rebound piece pushes the skin driving structure to rotate clockwise;

[0040] In a preferred implementation form, the pressing member comprises a pressing cap, a fixing 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 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 from the fixing cylinder, and the lower end of the pressing rod drives the skin film driving structure.

[0041] In a preferred implementation form, the inner side of the fixing cylinder is inwardly convex with a guide convex ring, the upper side and / or the lower side of the guide convex ring is fixedly connected with an outer sealing ring, and the outer wall of the pressing rod is sealed with the outer sealing ring.

[0042] In a preferred implementation form, the pressing rod comprises a threaded head, an elongated rod and a pressing head, the threaded head, the elongated rod and the pressing head are integrally formed, the threaded head is threadedly connected with the pressing cap, the pressing head is arranged at the lower side of the guide convex ring, and the pressing head drives the skin film driving structure.

[0043] In a preferred implementation form, the outer diameter of the pressing head is greater than the inner diameter of the guide convex ring.

[0044] In a preferred implementation form, the pressing cap comprises a cap body and a connecting head, the inner side of the cap body is convex with the connecting head, the inner side of the connecting head is provided with an inner thread, and the threaded head is threadedly connected with the connecting head.

[0045] In a preferred implementation form, the rebound member is a pressing spring, the pressing spring is sleeved on the outer wall of the elongated rod, the upper end of the pressing spring is abutted against the inner wall of the pressing cap, and the lower end of the pressing spring is abutted against the upper side of the guide convex ring.

[0046] In a preferred implementation form, the rebound member is a rebound spring, the lower end of the rebound spring is fixedly connected to the inner wall of the gas pipeline, the upper end of the rebound spring is abutted against the lower side of the skin film driving structure, and the rebound spring pushes the skin film driving structure to rotate clockwise.

[0047] In a preferred implementation form, the rebound member is a permanent magnet, the permanent magnet is fixedly connected to the skin film driving structure, the pressing head is made of magnetic material, and the pressing head attracts the permanent magnet to drive the skin film driving structure to rotate clockwise.

[0048] The self-closing valve comprises a gas pipeline micro-leakage automatic closing valve and a self-closing valve shell, and the gas pipeline micro-leakage automatic closing valve is fixedly connected to the inner side of the self-closing valve shell.

[0049] The gas pipeline micro-leakage automatic closing valve and the self-closing valve have the following beneficial effects:

[0050] The gas pipeline micro-leakage automatic closing valve comprises a valve shell, a valve cover, a diaphragm assembly and a valve body opening structure, the diaphragm assembly is tightly connected between the valve shell and the valve cover, and the valve body opening structure is arranged at the other end of the valve shell to push the diaphragm assembly to make the valve shell conduct gas or be closed. The valve cover comprises a cover body and a conducting piece, the cover body is installed inside a gas passage, the cover body is connected to the outside of the gas passage valve through the conducting piece, one end of the conducting piece is sealingly connected to the cover body, and the other end of the conducting piece is sealingly connected to the gas passage. The self-closing valve comprises the gas pipeline micro-leakage automatic closing valve and a self-closing valve shell, and the gas pipeline micro-leakage automatic closing valve is fixedly connected inside the self-closing valve shell.

[0051] The gas pipeline micro-leakage automatic closing valve is integrally formed or fixedly connected, the number of components is reduced, the assembly complexity is reduced, and the valve is suitable for installation in a narrow space. The conducting piece fixed to the cover body conducts external atmospheric pressure to form a stable pressure cavity between the valve cover and one side of the diaphragm in the gas valve, and the diaphragm can be closed to the gas passage in the case of micro-leakage of the gas. The valve body opening structure enables the pressing piece to push the diaphragm driving structure to achieve the opening state of the diaphragm. The self-closing valve enables the gas pipeline micro-leakage automatic closing valve to be fixedly connected inside the self-closing valve shell, and all components jointly act on the self-closing valve. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0053] Figure 1 It is a structure schematic view of the valve shell of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present application.

[0054] Figure 2 It is another angle structure schematic view of the valve shell of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present application.

[0055] Figure 3 It is a structure schematic view of the valve cover of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present application.

[0056] Figure 4 It is a sectional view of the cover body of the valve cover of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present application.

[0057] Figure 5 It is a structure schematic view of the conducting piece of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present application.

[0058] Figure 6 Structure diagram of the skin film of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure;

[0059] Figure 7 Structure diagram of the fixed shell of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure;

[0060] Figure 8 Structure diagram of the skin film driving magnet and screw of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure;

[0061] Figure 9 Structure diagram of the driving rod of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure in the supporting state inside the valve shell;

[0062] Figure 10 Sectional view of the valve shell and sealing cover of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure;

[0063] Figure 11 Structure diagram of the pressing rod of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure;

[0064] Figure 12 Structure diagram of the skin film driving structure of the valve body opening structure of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure, in which the rebound piece is a rebound spring;

[0065] Figure 13 Structure diagram of the skin film driving structure of the valve body opening structure of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure, in which the rebound piece is a permanent magnet;

[0066] Figure 14 Structure diagram of the skin film driving structure of the valve body opening structure of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present disclosure, in which the rebound piece is a torsion spring;

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

[0068] Figure 16 Sectional view of another rebound piece driving mode of the self-closing valve according to an embodiment of the present disclosure;

[0069] Figure 17 Sectional view of still another rebound piece driving mode of the self-closing valve according to an embodiment of the present disclosure;

[0070] Figure 18FIG. 2 is a sectional view of a valve body opening structure of a gas pipeline micro-leak automatic closing valve according to an embodiment of the present disclosure;

[0071] Figure 19 For Figure 15 FIG. 6 is a partial enlarged sectional view of a rebound member at A inside a self-closing valve according to an embodiment of the present disclosure, which is a rebound spring driving type;

[0072] Figure 20 For Figure 16 FIG. 7 is a partial enlarged sectional view of a rebound member at B inside a self-closing valve according to an embodiment of the present disclosure, which is a press spring and permanent magnet driving type;

[0073] Figure 21 For Figure 17 FIG. 8 is a partial enlarged sectional view of a rebound member at C inside a self-closing valve according to an embodiment of the present disclosure, which is a torsion spring driving type.

[0074]

MAIN COMPONENT SYMBOL EXPLANATION

[0075] 01, valve shell;

[0076] 011, through portion; 012, connecting portion; 013, extension portion;

[0077] 1, through groove;

[0078] 2, driving mechanism;

[0079] 21, hinged rod; 22, upper folding portion; 23, lower folding portion;

[0080] 3, threaded connecting hole;

[0081] 4, support frame;

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

[0083] 5, hinged groove; 6, hinged hole; 7, guide convex rib;

[0084] 02, valve cover;

[0085] 021, cover body;

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

[0087] 022, through member;

[0088] 0221, first sealing portion; 0222, elongated portion; 0223, second sealing portion; 0224, limiting plate;

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

[0090] 12, sealing outer thread; 13, sealing inner thread;

[0091] 03, coating assembly;

[0092] 031, connecting outer ring; 032, resilient part; 033, sealing part; 0331, sealing convex ring;

[0093] 14, drive assembly;

[0094] 141, fixed shell; 1411, through hole;

[0095] 142, movable assembly;

[0096] 1421, drive rod; 1422, threaded rod; 1423, connecting barrel; 1424, drive magnet;

[0097] 15, screw;

[0098] 04, valve body opening structure;

[0099] 041, pressing piece;

[0100] 0411, pressing cap;

[0101] 04111, cap body; 04112, connecting head; 0412, fixed barrel; 0413, pressing rod;

[0102] 04131, threaded head; 04132, elongated rod; 04133, pressing head;

[0103] 042, resilient piece;

[0104] 16, coating drive structure; 17, guide convex ring; 18, outer sealing ring; 0001, gas passage. DETAILED DESCRIPTION

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

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

[0107] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0108] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of the present application as well as above-mentioned drawings of the application merely denote different instances of similar objects and do not necessarily imply a specific order or chronology of embodiments of the application described herein. It is to be understood that data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be carried out in other than the order shown or described herein. Furthermore, the terms "comprise" and "comprising" and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product or apparatus that comprises a list of steps or units are not necessarily limited to those steps or units that are expressly listed, but can include additional steps or units not expressly listed or inherent to such process, method, product or apparatus.

[0109] For the purposes of the description hereinafter, a spatial relative term, such as "above", "upper", "top", "upward", "below", "lower", "bottom", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It is to be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device is inverted, then the element or feature that is described as above other elements or features would then be oriented below the other element(s) or feature(s). Thus, the example term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0110] According to Figures 1-21 As shown in the figure, the gas pipeline micro-leakage automatic closing valve includes a valve housing 01 and a valve cover 02 for fixing the skin film, a skin film assembly 03 for realizing the gas conduction inside the valve body, and a valve body opening structure 04. The skin film 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, and the valve body opening structure 04 pushes the skin film assembly 03 to make the valve housing 01 gas conduction or closed.

[0111] The valve cover 02 comprises a cover body 021 and a through member 022, the gas pipeline micro-leakage automatic closing valve is fixedly connected with the gas passage 0001, and the cover body 021 is installed inside the gas passage 0001. In order to enable the through member 022 of the cover body 021 to play a role of communicating with the atmospheric pressure outside, in the case of gas pipeline micro-leakage, the inside diaphragm of the closing valve can be timely pushed to close and seal to block the gas. The cover body 021 is communicated with the outside of the gas passage 0001 through the through member 022. A plurality of openings are arranged on the connecting ring of the valve cover 02, the valve cover 02 and the valve shell 01 are tightly and sealingly 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 shell 01. The through member 022 is sealingly connected with the cover body 021 at one end, and the other end is sealingly connected with the gas passage 0001, the outside atmospheric pressure is communicated, and a stable pressure cavity is formed between the valve cover 02 and one side of the diaphragm inside the gas valve. When micro-leakage occurs, the pressure on the side of the diaphragm close to the fixed connection of the valve shell 01 decreases, and the pressure on the side of the diaphragm close to the fixed connection of the valve cover 02 remains unchanged due to the communication with the outside air pressure. The pressure difference between the two sides of the diaphragm causes the diaphragm assembly 03 to drive the diaphragm to move towards the valve shell 01, so that the diaphragm seals and blocks the gas. When the gas is normally supplied, the pressure on the side of the diaphragm close to the fixed connection of the valve shell 01 increases, and the pressure is higher than that of the side of the diaphragm close to the fixed connection of the valve cover 02 and the outside communication pressure cavity. The diaphragm maintains elastic deformation under the action of the pressure difference, the gas passage remains open, and normal gas supply is maintained.

[0112] The valve shell 01 comprises a through part 011, a connecting part 012 and an extension part 013, the through part 011, the connecting part 012 and the extension part 013 are integrally formed or fixedly connected in sequence, the outer wall of the connecting part 012 of the valve shell 01 is sealingly and fixedly connected with the gas valve pipeline, and the other side is connected with the diaphragm through the diaphragm assembly 03. In this structure, in order to ensure that the gas can normally flow, a through groove 1 is arranged through the outer wall of the through part 011, which can enable the gas to enter the gas valve pipeline from one end through the through groove 1. The extension part 013 of the valve shell 01 is connected with a driving mechanism 2, the driving mechanism 2 can drive the diaphragm assembly to move away from the valve shell 01, so that the gas flows, and the driving mechanism 2 can automatically reset after driving the diaphragm.

[0113] In order to increase the gas flow of the valve shell 01 and the fixed connection of the valve shell 01, the diaphragm and the valve cover 02, a threaded connection hole 3 is arranged at the end of the through part 011. By arranging a plurality of through grooves 1 on the edge of the valve shell 01, the flow rate of the gas passing through the valve shell 01 is not affected under the existing structure. The threaded connection hole 3 is internally provided with an internal thread, and the threaded connection hole 3 is fixedly connected with the valve cover and the fixed shell 41 and the diaphragm through the threaded connection, so that the diaphragm can be tightly fixed by the valve shell 01 and the valve cover.

[0114] In order to stabilize the gas flow flux, ensure the stability of the connection between the valve shell 01, valve cover 02 and the skin film, and the risk of gas leakage through the connection between the valve cover 02 and the skin film, four guide grooves 1 and four threaded connection holes 3 are provided, the distance between adjacent guide grooves 1 is greater than the diameter of the threaded connection hole 3, and the threaded connection hole 3 is provided at the middle position of the adjacent guide grooves 1. By providing four guide grooves 1 and four threaded connection holes 3, and providing the threaded connection hole 3 at the middle position of the adjacent guide grooves 1, the gas flow path is increased, and the stability of the connection between the valve shell 01, valve cover 02 and the skin film is enhanced by the symmetrically distributed threaded connection holes 3. In order to enable the skin film assembly 03 to be supported in the valve shell 01 and ensure its stable movement trajectory, a support frame 4 is provided in the middle of the connecting portion 012, which supports the skin film assembly. The support frame 4 in the valve shell 01 can provide support force to the skin film assembly connected inside the valve shell 01, ensure the trajectory of the skin film assembly when the skin film is opened and sealed, and ensure that the skin film can abut against and seal the valve shell 01 each time the gas is blocked.

[0115] In order 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 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 012, and the skin film assembly passes through the support ring 42. The outer wall of the support ring 42 is integrally connected with the support rod 41, and is integrally formed with the inner portion of the connecting portion. The support rods 41 are distributed in a circle around the outer wall of the support ring 42, and the support rods 41 are in a hollow structure, and multiple hollow structures ensure the normal flow of gas. In order to ensure the movement of the driving mechanism 2 in the valve shell 01, a hinge groove 5 is provided on the upper side of the extension portion 013, and the driving mechanism 2 is hinged in the extension portion 013. The hinge portion of the driving mechanism 2 can be embedded in the inside of the valve shell 01 and extended along the hinge groove 5, and the hinge groove 5 is provided to avoid interference between the driving mechanism 2 and the inner wall of the valve shell 01 during movement, and to ensure rotation within a certain angle.

[0116] In order to enable the driving mechanism 2 to drive the skin film assembly, the driving mechanism 2 comprises: 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 in a bent structure. Through the specific shape of the upper folding part 22 and the lower folding part 23 of the driving mechanism 2, the driving mechanism 2 can be arranged inside the extension part 013, which increases the compactness between the structures. The upper end of the lower folding part 23 is provided with a hinge hole 6, the hinged rod 21 passes through the hinge hole 6, and the both ends of the hinged rod 21 are rotationally connected to the inner wall of the extension part 013. When the lower folding part 23 rotates through the hinged rod 21, it abuts against the end face of the skin film assembly and rotates, so that the rotating force drives the skin film assembly away from the driving mechanism 2 and moves axially. In order to further limit the lower folding part 23, guide ribs 7 are arranged on the inner wall of the extension part 013 at the positions of the both sides of the lower folding part 23. The guide ribs 7 enable the lower folding part 23 to always move in the same vertical plane when rotating through the hinged rod. In order to improve the adaptability of the valve body and the gas passage 0001, the outer diameters of the lead-through part 011, the connecting part 012 and the extension part 013 decrease in turn, so that they can be easily installed with the lead-through part 22.

[0117] In order to form an independent cavity between the valve cover 02 and the skin film after fixed connection, the cover body 021 comprises: a connecting ring 0211, a pressing plate 0212 and a sealing cylinder 0213, the sealing cylinder 0213 is open at one end, 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 on the outer part of the pressing plate 0212. Through the integral molding of the connecting ring 0211, the pressing plate 0212 and the sealing cylinder 0213, and through the special shape of the annular opening at one end of the sealing cylinder 0213, an independent cavity is formed between the valve cover 02 and the skin film inside the sealing cylinder 0213. Through the gas pressure cavity in communication with the outside, the skin film acts under the pressure difference when the skin film has a slight leakage in the gas passage 0001. When the gas supply system has pressure fluctuations due to slight leakage, the skin film can close the gas passage in the case of slight leakage of gas. In order to ensure the connection strength of the valve cover 02, the connecting ring 0211 and the pressing plate 0212 are integrally formed through the extension cylinder 8, which extends away from the sealing cylinder 0213 and increases the space inside the sealing cylinder 0213. In order to further improve the sealing performance, the sealing groove 9 is arranged between the extension cylinder 8 and the pressing plate 0212, and the sealing ring 10 is arranged in the sealing groove 9. The sealing ring 10 is installed in the sealing groove 1 and can tightly fit the surface of the connection, and the sealing ring can maintain a good sealing state by relying on elasticity.

[0118] In order to make the valve body can communicate with the outside atmosphere, the through part 022 includes: the first sealing part 0221, the elongated part 0222 and the second sealing part 0223, the first sealing part 0221, the elongated part 0222 and the second sealing part 0223 are integrally formed in sequence, the first sealing part 0221 and the sealing cylinder 0213 are sealingly connected, and the second sealing part 0223 and the gas passage 0001 are sealingly connected. In order to connect the first sealing part 0221, the valve cover 02 is provided with a threaded hole in the side wall of the sealing cylinder 0213, and the first sealing part 0221 and the second sealing part 0223 respectively seal the gas passage 0001 and the valve cover 02. The through hole 11 is provided through the center of the first sealing part 0221, the elongated part 0222 and the second sealing part 0223. It is ensured that the gas can flow into the elongated part 0222 from the through hole 11 on the side of the first sealing part 0221, and flow out from the through hole 11 on the side of the second sealing part 0223.

[0119] In order to make the through part 022 be fixedly connected on the valve cover 02, the outer diameters of the first sealing part 0221, the elongated part 0222 and the second sealing part 0223 increase in sequence. The step design of the increasing outer diameter makes the assembly process of the through part 022 and the valve cover 02 more reasonable. Specifically, the stepped connection between the elongated part 0222 and the limiting plate 0224 can limit the elongated part 0222 after it extends into the opening of the gas passage 0001. The first sealing part 0221 and the second sealing part 0223 are provided with sealing external threads 12 outside, and the sealing external threads 12 are threadedly connected and fixed with the valve sealing internal threads 13. Similarly, the stepped connection between the elongated part 0222 and the first sealing part 0221 further limits the elongated part 0222. Thus, when the through part 4 is rotated, the threaded structure of the first sealing part 0221 and the second sealing part 0223 can simultaneously threadedly seal and connect the gas passage 0001 and the valve cover 02.

[0120] In order to further limit and fix the through part 022, the through part 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 elongated part 0222, and the through hole 11 penetrates the limiting plate 0224. The integrally formed design of the limiting plate 0224 and the through part 022 prevents the axial loosening of the through part 022 due to the loosening of the threaded connection caused by long-term use through mechanical limiting.

[0121] In order to facilitate the external installation of the through part 022, a slot is provided on the side of the limiting plate 0224 away from the second sealing part 0223. The slot design of the limiting plate 0224 is adapted to standard tools, such as a slot screwdriver, so that the installation and disassembly of the through part 022 are more convenient.

[0122] The skin film assembly 03 comprises a connecting outer ring 031, a rebound part 032 and a sealing part 033. The rebound part 032 is in an open state, and the rebound part 032 is integrally formed with the connecting outer ring 031 at the edge, and the rebound part 032 is fixedly connected with the sealing part 033 at the center. In order to make the skin film perform a sealing action, the rebound part 032 is in an open state, and a greater fitting area is generated when the rebound part 032 is elastically deformed, so that the sealing effect is ensured. The sealing part 033 is fixedly connected with the rebound part 032, and the sealing part 033 is in a cylindrical shape.

[0123] When the gas system is in normal operation, the blocking side is the inside of the gas passage 0001 close to the movable assembly 142, and the gas is normally supplied. The gas pressure on the blocking side is higher than the pressure of the atmosphere communication cavity. The skin film is driven by the skin film driving structure 3 to overcome the magnetic attraction of the driving magnet 1424 and the elastic force of the skin film, and is opened to the side of the gas pressure cavity. The gas flows from the opening of the skin film to the blocking side, and at this time the skin film driving structure 3 is reset. Since the gas pressure on the blocking side is higher than the pressure of the atmosphere communication cavity on the other side of the skin film, the skin film maintains an elastically deformed state. The gas passage is kept open, and at this time the skin film is in an open state.

[0124] When a slight leakage occurs, the gas pressure on the blocking side decreases, and the pressure on the side of the skin film close to the valve shell 01 decreases. The pressure of the atmosphere communication cavity communicated with the outside through the conducting piece 022 is unchanged, so the pressure is less than the pressure of the pressure cavity with stable atmospheric pressure on the other side of the skin film and the side of the valve cover 02. Or the gas pressure inside the gas leakage pipeline is equal to the pressure of the pressure cavity. At this time, the pressure difference between the two sides of the skin film changes, and the skin film returns to the initial position due to the elastic force of the skin film and the magnetic attraction of the driving magnet 1424. The elastic deformation is released, the valve passage is closed, and the gas continues to flow. Further, in the case of slight leakage, the gas pressures on both sides of the skin film are equal, and at this time the elastic deformation of the open skin film cannot be maintained. The release of the elastic deformation drives the skin film to reset, and the magnetic attraction of the driving magnet 1424 to the fixed shell 141 further drives the movable assembly 142 to reset the skin film. The sealing part 033 is tightly fitted on the blocking position of the valve shell 01, and the gas flow is blocked. At this time, the skin film is in a closed state.

[0125] In order to accurately position the skin film sealing part 033 when the skin film is opened and closed, so as to improve the sealing effect, one end of the sealing part 033 is integrally formed with the rebound part 032, and the other end of the sealing part 033 is provided with a sealing protruding ring 0331. The cross section of the sealing protruding ring 0331 includes a semicircle, an ellipse and other irregular shapes, and the preferred structure of the present application is a semicircle.

[0126] In order to further increase the size of the sealing part 033, reduce the area of the gas pressure. The 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 is circumferentially arranged along the sealing part 033. Due to the structure of 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 the gas flows from the valve shell interior into the guide groove, the size and the edge with curvature of the sealing convex ring 0331 can also reduce the area of the gas pressure, increase the force difference on both sides, so that the diaphragm can be more tightly attached to the shell in the closed state, increase the sealing performance, and reduce the possibility of gas leakage.

[0127] The diaphragm assembly 03 includes the diaphragm described above, and further includes a driving assembly 14 fixedly connected along the center of the sealing part 033, so that the diaphragm can be opened in the closed state. The driving assembly 14 transmits external driving force through the diaphragm driving structure 3, overcomes the elastic resistance of the rebound part 032, drives the axial displacement of the sealing part 033, and realizes the active opening control of the diaphragm.

[0128] In order to fix the position of the diaphragm and 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 and sealingly connected with the connecting outer ring 031, and the connecting outer ring 031 is clamped by the fixed shell 141 and the valve shell 01, so as to ensure that the diaphragm assembly is fixed in the valve body. The fixed shell 141 is provided with a through hole 1411 in the center, so that when the diaphragm is in the open state, the sealing part 033 is away from the through hole 41, and the 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 with the sealing part 033.

[0129] In order to keep the skin film open when opening, avoid external force to close it, the moving assembly 142 includes: drive rod 1421, threaded rod 1422, connecting cylinder 1423 and drive magnet 1424, one end of the threaded rod 1422 is integrally formed with the drive rod 1421, the other end of the threaded rod 1422 is threadedly connected with the connecting cylinder 1423. When the drive rod 1421 is pushed by external force, the threaded rod 1422 drives the skin film and the connecting cylinder 1423 to move axially towards the valve cover 02, and the other end of the connecting cylinder 1423 is fixedly connected with the drive magnet 1424. A through hole is formed 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 with 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, and after passing through the sealing part 033, the part of the threaded rod 1422 extending out of the sealing part 033 is threadedly connected with the connecting cylinder 1423, and the connecting cylinder 1423 passes through the through hole 1411. In order to ensure the dispersion of the pressure of the drive rod 1421 on the sealing part 033, avoid the damage of the skin film through hole and the transition connection of the drive rod 1421 and the threaded rod 1422 due to pressure concentration, and thus affect the sealing performance, the diameter of the drive rod 1421 is increased to form a stable contact surface between the end of the drive rod 1421 and the sealing part 033, evenly disperse the pressure, and prevent local pressure concentration. In order to fix the drive magnet 1424, the drive magnet 1424 is a magnetic ring, an open hole is formed in the center of the magnetic ring, a screw 15 is arranged through the open hole, the screw 15 passes through the center of the magnetic ring and presses the connecting cylinder 1423 to fix the drive magnet 1424.

[0130] Valve body opening structure 04, including: presser 041 and spring 042, presser 041 sealing fixedly connected on the outer wall of gas passage 0001, spring 042 fixedly connected on diaphragm driving structure 16, the lower end of presser 041 extends into the inside of gas passage 0001. In order to manually open the diaphragm, the lower end of presser 041 pushes diaphragm driving structure 16 to rotate counterclockwise, spring 042 pushes diaphragm driving structure 16 to rotate clockwise to reset. When the diaphragm is closed due to micro leakage or other reasons, the internal pressure of the valve body is relatively smaller than the external pressure or equal to the external pressure. Only need to press the presser 041 of the valve body opening structure 04, so that the presser 041 pushes the diaphragm driving structure 16, and then drives the diaphragm sealing part to open. When the gas flows normally, the thrust generated by the gas pressure will make the diaphragm elastically deform and remain in the open position, at this time, the gas pressure can maintain a certain level, enough to overcome the slight resistance of the elastic force of the diaphragm itself or other factors. Then release the presser 041, the presser 041 resets through the spring 042 and separates from the diaphragm driving structure 16, to ensure that the next time can be normally pressed. Gas is dangerous, in order to prevent accidents caused by accidental opening, gas valve needs to avoid valve misoperation caused by external factors or non-human factors. Presser 041 can overcome the sealing resistance of the diaphragm, because the diaphragm exists certain resistance in the sealing block state, including the friction and spring force of its own sealing place. Presser 041 can provide enough power to push the diaphragm through mechanical transmission, so that it can overcome the sealing resistance, so as to realize the opening of the valve seat.

[0131] In order to ensure that the pressing piece 041 can drive the skin film driving structure 16, the pressing piece 041 comprises: a pressing cap 0411, a fixed cylinder 0412 and a pressing rod 0413, the pressing cap 0411 is fixedly connected to the pressing piece 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 passage 0001, the pressing rod 0413 extends into the inside of the gas passage 0001 along the fixed cylinder 0412, and the lower end of the pressing rod 0413 drives the skin film driving structure 16. The pressing cap 0411 is sleeved on the upper end of the fixed cylinder 0412, the pressing cap 0411 is fixedly connected to one end of the pressing rod 0413, and the pressing rod 0413 is inside the fixed 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 fixed cylinder and the pressing cap 0411. When the pressing cap 0411 is pressed, the inner wall of the skirt of the pressing cap 0411 is attached to the outer wall of the fixed cylinder 0412 and moves downward, and at the same time drives the pressing rod 0413 to move downward, so that the end of the pressing rod 0413 away from the pressing cap 0411 collides with the skin film driving structure 16. In order to limit the movement distance of the pressing rod 0413, when the top inner wall of the pressing cap 0411 collides with the end of the pressing rod 0413 or the skirt end of the pressing cap 0411 collides with the stepped structure of the fixed cylinder 0412, the pressing cap 0411 cannot be pressed downward any more. The fixed cylinder 0412 is a cylinder, and a through hole is arranged in the fixed cylinder 0412 in the axial direction, penetrating the two end faces of the fixed cylinder 0412. In order to further limit the pressing of the pressing cap 0411, a hexagonal nut is threadedly connected to the outer wall of the fixed cylinder 0412, or a hexagonal protrusion is integrally formed on the outer wall of the fixed cylinder 0412. The protrusion range is one circle of the fixed cylinder 0412 in the circumferential direction. The part of the fixed cylinder 0412 located below the hexagonal nut or the hexagonal protrusion is provided with a thread and is threadedly connected to the threaded hole of the gas passage 0001. The connection between the hexagonal nut or the hexagonal protrusion and the outer wall of the fixed cylinder 0412 is in a stepped shape, and cooperates with the connection port of the gas passage 0001.

[0132] The upper end part of the guide protruding ring 17 in the fixed cylinder 0412 is the upper side in the fixed cylinder 0412, and the lower end part of the guide protruding ring 17 in the fixed cylinder 0412 is the lower side in the fixed cylinder 0412. In order to facilitate the installation of the elastic member 042, the inner diameter of the upper side of the fixed cylinder 0412 is greater than the inner diameter of the lower side of the fixed cylinder 0412.

[0133] In order to improve the sealing performance of the valve body opening structure 04, a guide protruding ring 17 is protruded inward in the fixed cylinder 0412, and an outer sealing ring 18 is fixedly connected to the upper side and / or the lower side of the guide protruding ring 17. The guide protruding ring 17 is protruded on the inner wall of the fixed cylinder 0412 in one circle in the axial direction and extends to the center of the fixed cylinder 0412. A through hole is finally formed in the center of the guide protruding ring 17, and the inner diameter of the 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 realize the pressing rod 0413 drive skin film drive structure 16, the pressing rod 0413 includes: screw head 04131, elongated rod 04132 and pressing head 04133, screw head 04131, elongated rod 04132 and pressing head 04133 are integrally formed, screw head 04131 and pressing cap 0411 are threadedly connected, 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. The elongated rod 04132 passes through the center through hole of the guide convex ring 17, the outer diameter of the pressing head 04133 is larger than the outer diameter of the elongated rod 04132, the inner diameter of the lower side of the fixed cylinder 0412 is the same as the inner diameter of the pressing head 04133, and the outer wall of the pressing head 04133 can slide on the inner wall of the lower side of the fixed cylinder 0412. When the pressing cap 0411 is pressed, the pressing rod 0413 is moved, the pressing head 04133 touches the skin film drive structure 16 and is pressed down, and the skin film drive structure 16 rotates in the pressing process of the pressing head 04133 through the hinged rod or the torsional spring, thereby driving the skin film 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 guide convex ring 17. The diameter of the through hole of the guide convex ring 17 is smaller than the diameter of the pressing head 04133. When the pressing member 041 is reset, the elastic member 042 generates a rebound force, the pressing cap 0411 moves away from the gas passage 0001, and when the pressing head 04133 moves to the position of the guide convex ring 17, the pressing head 04133 touches the lower end face of the guide convex ring 17 to stop moving, thereby limiting the pressing head 04133. In order to connect the pressing cap 0411 with the screw head 04131, the pressing cap 0411 includes: cap body 04111 and connecting head 04112, the connecting head 04112 is arranged inside the cap body 04111, the inner thread is arranged inside the connecting head 04112, and the screw head 04131 is threadedly connected with the connecting head 04112. The cap body 04111 and the connecting head 04112 are integrally formed, thereby enhancing the connection strength between the pressing cap 0411 and the pressing rod 0413.

[0136] In order to fix the elastic member 042 and provide the pressing function of the pressing member 041, the elastic member 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. When the pressing cap 0411 is pressed down, the upper end of the pressing spring is subjected to a pressing force and is elastically deformed. When the pressing is stopped and the pressing cap 0411 is released, the pressing spring returns to the initial position under the action of the elastic force. The compression and rebound of the pressing spring provide the automatic reset function for the pressing member 0413, and the pressing spring is used in cooperation with the permanent magnet.

[0137] In one embodiment, to reset the skin film driving structure 16 and the pressing member 041, the skin film driving structure 16 and the valve housing hinged groove 5 are provided with a torsion spring. By pressing down the pressing member 041, the pressing head 04133 touches the upper folded part 22 of the skin film driving structure 16 and applies downward pressure to it, pushing the skin film driving structure 16 to rotate counterclockwise. The torsion arm of the torsion spring is elastically twisted and deformed by the force generated by the rotation of the skin film driving structure 16. When the pressing member 041 is stopped, the torsion spring stops twisting and deforming, and returns to its original shape, and the skin film driving structure 16 is reset counterclockwise. At the same time, the pressing head 04133 that is driven by the skin film driving structure 16 and abuts against the upper folded part 22 moves upward, so that the pressing member 041 is also reset.

[0138] In another embodiment, to reset the skin film driving structure 16, the rebound member 042 is a rebound spring. A rebound spring fixing member is provided on the inner wall of the gas passage 0001 below the skin film driving structure 16, and is fixedly connected to the inner wall of the gas passage 0001, or is fixedly connected by threads. One end of the rebound spring is sleeved on the fixing member and abuts against the platform surface where the fixing member and the spring contact, and the other end of the spring abuts against the spring fixing groove provided in the skin film driving structure 16. By pressing down the pressing member 041, the skin film driving structure generates a rotating force through the hinged rod and rotates counterclockwise. The spring groove where the spring contacts is also pressed down and deformed when the skin film driving structure 16 rotates. When the pressing member 041 is released, the rebound spring releases the elastic potential energy, and the skin film driving structure 16 is reset before the spring returns to the elastic deformation, pushing the pressing head 04133 to move upward, so that the pressing member 041 is also reset by its rebound spring.

[0139] In another embodiment, in addition to the structure of the elastic member 042 and the pressing member 041 described above, another structure can be used to make the skin film driving structure 16 reset by pressing. The elastic member 042 is a permanent magnet fixedly connected to the skin film driving structure 16, and the pressing head 04133 is a magnetic material. The pressing head 04133 attracts the permanent magnet to drive the skin film driving structure 16 to rotate clockwise. In this way, the permanent magnet is arranged in a ring groove on the skin film driving structure 16 below the pressing head 04133, and the pressing head 04133 is perpendicular to the permanent magnet. The end of the pressing head 04133 is a magnetic material and has an opposite magnetic pole to that of the permanent magnet, so that the two components can be attracted together. When the pressing member 041 is pressed down, the pressing head 04133 touches the skin film driving structure 16, the permanent magnet of the skin film driving structure 16 is attracted to the magnetic material of the pressing head 04133, the skin film driving structure 16 rotates to push the skin film assembly to move and open the skin film. When the pressing member passes through the elastic reset of the pressing spring, the pressing head 04133 is attracted to the magnet to reset the skin film driving structure 16. When the skin film driving structure 16 rotates to the lower side of the fixed cylinder 0412, the skin film driving structure 16 touches the lower side of the fixed cylinder 0412, and the permanent magnet is separated from the pressing head 04133.

[0140] According to Figures 15-17 As shown in the self-closing valve, the self-closing valve includes a gas pipeline micro-leakage automatic closing valve, and the gas pipeline micro-leakage automatic closing valve is fixedly connected inside the self-closing valve shell. The gas pipeline micro-leakage automatic closing valve can quickly block the gas when micro-leakage is detected inside the self-closing valve body. The skin film assembly 03 is tightly sealed and connected on both sides through the valve shell 01 and the valve cover 02. The valve shell 01 is fixedly connected inside the self-closing valve shell, and the valve shell 01 internally leads the gas pipeline. The valve shell 01 is close to the skin film assembly 03 in the middle part of the valve shell 01 to seal and block the gas pipeline, or the valve shell 01 is away from the valve shell 01 to lead the gas pipeline through the skin film assembly 03 in the middle part of the valve shell 01.

[0141] The above only describes preferred embodiments of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A gas pipeline micro-leak automatic shut-off valve, characterized in that, Include: Valve shell (01), valve cover (02), skin film assembly (03) and valve body opening structure (04), the valve shell (01) and the valve cover (02) are connected tightly between the skin film assembly (03), the other end of the valve shell (01) is provided with valve body opening structure (04), make the valve body opening structure (04) push the skin film assembly (03) make valve shell (01) gas conduction or close; The valve cover (02) includes: cover body (021) and through piece (022), the cover body (021) is installed inside the gas passage (0001), the cover body (021) is connected with the outside of the gas passage (0001) through the through piece (022), one end of the through piece (022) is sealingly connected with the cover body (021), and the other end of the through piece (022) is sealingly connected with the gas passage (0001).

2. The automatic gas pipe micro-leak shut-off valve according to claim 1, characterized in that, The valve shell includes: through part (011), connecting part (012) and extension part (013), the through part (011), connecting part (012) and extension part (013) are integrally formed or fixedly connected in sequence, a through groove (1) is formed through the outer wall of the through part (011), the outer wall of the connecting part (012) is sealingly and fixedly connected with the gas valve pipeline, and the extension part (013) is connected with a driving mechanism (2), so that the driving mechanism drives the skin film assembly (03); The through groove (1) is provided with a plurality of through grooves (1), and the positions between adjacent through grooves (1) are provided with threaded connection holes (3) at the end of the through part (011); The through groove (1) is provided with four through grooves (1), the threaded connection holes (3) are provided with four threaded connection holes (3), the distance between adjacent through grooves (1) is greater than the diameter of the threaded connection holes (3), and the threaded connection holes (3) are arranged at the middle positions of adjacent through grooves (1); The middle part of the connecting part (012) is provided with a support frame (4), and the support frame (4) supports the skin film assembly (03); The support frame (4) includes: support rod (41) and 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 with the inner wall of the connecting part (012), and the skin film assembly passes through the support ring (42).

3. The automatic gas pipe micro-leak shut-off valve according to claim 2, characterized in that, The upper side of the extension part (013) is provided with a hinge groove (5), and the driving mechanism (2) is hinged in the extension part (013) and extends at the hinge groove (5); The driving mechanism (2) includes: hinge rod (21), upper folding part (22) and lower folding part (23), the upper folding part (22) and the lower folding part (23) are integrally formed in a bending structure, the upper end of the lower folding part (23) is provided with a hinge hole (6), the hinge rod (21) passes through the hinge hole (6), and the two ends of the hinge rod (21) are rotatably connected with the inner wall of the extension part (013); The inner wall of the extension part (013) is provided with a guide convex rib (7) at the positions on both sides of the lower folding part (23); The outer diameters of the conducting part (011), the connecting part (012) and the extending part (013) are gradually reduced.

4. The automatic gas pipe micro-leak shut-off valve according to claim 1, characterized in that, The cover body (021) comprises a connecting ring (0211), a pressing plate (0212) and a sealing cylinder (0213), one end of the sealing cylinder (0213) is open, the pressing plate (0212) is integrally formed at the opening of the sealing cylinder (0213), the pressing plate (0212) extends to the outside of the sealing cylinder (0213), and the connecting ring (0211) is integrally formed on the outside of the pressing plate (0212); The connecting ring (0211) and the pressing plate (0212) are integrally formed through an extending cylinder (8) extending away from the sealing cylinder (0213); A sealing groove (9) is arranged between the extending cylinder (8) and the pressing plate (0212), and a sealing ring (10) is arranged in the sealing groove (9).

5. The automatic gas pipe micro-leak shut-off valve according to claim 4, characterized in that The conducting part (022) comprises a first sealing part (0221), an extending part (0222) and a second sealing part (0223), the first sealing part (0221), the extending part (0222) and the second sealing part (0223) are integrally formed in sequence, the first sealing part (0221) is sealingly connected with the sealing cylinder (0213), and the second sealing part (0223) is sealingly connected with a gas valve pipeline; A conducting hole (11) is arranged through the center of the first sealing part (0221), the extending part (0222) and the second sealing part (0223); The outer diameters of the first sealing part (0221), the extending part (0222) and the second sealing part (0223) are gradually increased; A sealing outer thread (12) is arranged on the outside of the first sealing part (0221) and the second sealing part (0223), a sealing inner thread (13) is arranged through the side wall of the sealing cylinder (0213), and the sealing outer thread (12) of the first sealing part (0221) is sealingly connected with the sealing inner thread (13); The conducting part (022) further comprises a limiting plate (0224), the limiting plate (0224) is integrally formed at one end of the second sealing part (0223) away from the extending part (0222), and the conducting hole (11) penetrates through the limiting plate (0224); A slot is arranged on the side of the limiting plate (0224) away from the second sealing part (0223).

6. The automatic gas pipe micro-leak shut-off valve according to claim 1, characterized in that, The skin film of the skin film assembly comprises a connecting outer ring (031), a rebound part (032) and a sealing part (033), the rebound part (032) is open, the connecting outer ring (031) is integrally formed on the edge of the rebound part (032), and the sealing part (033) is fixedly connected at the center of the rebound part (032); The sealing part (033) is in a cylindrical shape; One end of the sealing part (033) is integrally formed with the rebound part (032), and a sealing convex ring (0331) is arranged on the other end of the sealing part (033). The sealing convex ring (0331) is arranged at the edge of the sealing part (033); The film assembly further comprises a driving assembly (14) fixedly connected along the center of the sealing part (033); The driving assembly (14) comprises a fixed shell (141) and a movable assembly (142), the edge of the fixed shell (141) is tightly and sealingly connected with the connecting outer ring (031), a through hole (1411) is arranged 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 with the sealing part (033); The movable assembly (142) comprises a driving rod (1421), a threaded rod (1422), a connecting barrel (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 with the connecting barrel (1423), and the other end of the connecting barrel (1423) is fixedly connected with the driving magnet (1424); The threaded rod (1422) is fixedly connected with the sealing part (033) through the center of the sealing part (033); The connecting barrel (1423) passes through the through hole (1411); The diameter of the driving rod (1421) is greater than that of the threaded rod (1422), and the driving rod (1421) is tightly arranged at the end of the sealing part (033); The driving magnet (1424) is a magnetic ring, an open hole is arranged at the center of the magnetic ring, a screw (15) is arranged through the open hole, and the screw (15) tightly connects the magnetic ring to the end of the connecting barrel (1423).

7. The automatic gas pipe micro-leak shut-off valve according to claim 1, wherein, The valve body opening structure (04) comprises a pressing piece (041) and a rebound piece (042), the pressing piece (041) is sealingly and fixedly connected to the outer wall of the gas pipeline, the rebound piece (042) is fixedly connected to the film driving structure (16), the lower end of the pressing piece (041) extends into the interior of the gas pipeline, the lower end of the pressing piece (041) drives the film driving structure (16) to rotate counterclockwise, and the rebound piece (042) drives the film driving structure (16) to rotate clockwise; The pressing piece (041) comprises a pressing cap (0411), a fixed barrel (0412) and a pressing rod (0413), the pressing cap (0411) is fixedly connected with the pressing piece (041), the pressing cap (0411) is sleeved on the upper end of the fixed barrel (0412), the lower end of the fixed barrel (0412) is fixedly connected to the inner wall of the gas pipeline, and the pressing rod (0413) extends into the interior of the gas pipeline along the fixed barrel (0412), and the lower end of the pressing rod (0413) drives the film driving structure (16); The fixed cylinder (0412) is internally convexly provided with a guide convex ring (17), the upper side and / or the lower side of the guide convex ring (17) is fixedly connected with an outer sealing ring (18), and the outer wall of the pressing rod (0413) is sealed with the outer sealing ring (18); The pressing rod (0413) comprises a threaded head (04131), an elongated rod (04132) and a 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 film driving structure (16); The outer diameter of the pressing head (04133) is greater than the inner diameter of the guide convex ring (17); The pressing cap (0411) comprises a cap body (04111) and a connecting head (04112), the connecting head (04112) is convexly arranged in the cap body (04111), and an inner thread is formed in the connecting head (04112).

8. The automatic gas pipe micro-leak shut-off valve according to claim 7, characterized in that The rebounding 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); Or the rebounding piece (042) is a rebounding spring, the lower end of the rebounding spring is fixedly connected to the inner wall of the gas pipeline, the upper end of the rebounding spring abuts against the lower side of the film driving structure (16) and pushes the film driving structure (16) to rotate clockwise; Or the rebounding piece (042) is a permanent magnet, the permanent magnet is fixedly connected to the film driving structure (16), the pressing head (04133) is made of a magnetic material, the pressing head (04133) adsorbs the permanent magnet to drive the film driving structure (16) to rotate clockwise.

9. A self-closing valve characterized by The gas pipeline micro-leakage automatic closing valve comprises a self-closing valve shell (05), and the gas pipeline micro-leakage automatic closing valve is fixedly connected to the inside of the self-closing valve shell (05).

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