Valve shell and gas pipeline micro-leakage automatic shut-off valve thereof

Abstract

The utility model discloses a valve shell and a gas pipeline micro-leakage automatic shut-off valve thereof, and relates to the technical field of structural design of gas pipeline safety equipment. The valve shell comprises a communicating part, a connecting part and an extending part, the communicating part, the connecting part and the extending part are sequentially and integrally formed or fixedly connected, a communicating groove is formed in the outer wall of the communicating part in a penetrating mode, the outer wall of the connecting part is fixedly connected with a gas valve pipeline in a sealed mode, the extending part is connected with a driving mechanism, and the driving mechanism drives the leather membrane assembly. The gas pipeline micro-leakage automatic shut-off valve comprises a valve shell, a leather membrane assembly and a valve cover, and the leather membrane assembly is connected between the valve cover and the valve shell in a pressing and sealing mode. According to the valve shell and the gas pipeline micro-leakage automatic shut-off valve thereof, due to the symmetrical distribution structure of the valve shell conduction grooves, rapid transmission of pressure changes is ensured, and the detection sensitivity is remarkably improved. And all the parts are integrally formed or fixedly connected, so that the assembly complexity is reduced. The outer diameter of the extension part of the valve shell is reduced, so that combination with a driving mechanism is facilitated, and installation in narrow space is adapted.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pipeline safety equipment structure design technical field especially relates to a valve shell and its gas pipeline microleakage automatic closing valve. BACKGROUND

[0002] As the important infrastructure of city energy transmission, the safety and reliability of gas pipeline are directly related to people's life and property and social public safety. However, in practical application, the pipeline interface, valve and other parts are prone to microleakage due to material aging or installation defects and other factors. Although there are various gas automatic closing valves in the prior art, there are still significant deficiencies in microleakage detection response speed, structural stability and long-term sealing performance.

[0003] Firstly, the microleakage detection mechanism of traditional gas valve mainly depends on mechanical pressure sensor, which has low sensitivity and is difficult to trigger the closing action quickly in the early stage of leakage, resulting in continuous accumulation of small leakage and difficult to eliminate safety hazards.

[0004] Secondly, the existing valve structure is complex, and the cooperation between the driving mechanism and the sealing assembly is redundant, which not only increases the manufacturing cost, but also makes the installation and maintenance process cumbersome, especially the applicability is limited in small space.

[0005] Finally, the existing driving mechanism mainly adopts rigid connection or single hinge mode, which is easy to jam due to friction loss or deformation after repeated action, affecting the reliability of automatic closing function.

[0006] Therefore, the existing gas valve has the problems of structural redundancy, short sealing life and driving failure, and cannot realize the microleakage closing of gas pipeline. UTILITY MODEL CONTENTS

[0007] Therefore, the main purpose of the utility model is to provide a valve shell and its gas pipeline microleakage automatic closing valve, which can solve the problems of traditional gas valve, structural redundancy, inability to close in gas pipeline microleakage, short sealing life and driving failure in the prior art.

[0008] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0009] The valve shell comprises a through part, a connecting part and an extension part, the through part, the connecting part and the extension part are integrally formed or fixedly connected in sequence, a through groove is formed through the outer wall of the through 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 skin film assembly.

[0010] In a preferred embodiment, a plurality of through grooves are provided, and a threaded connection hole is provided at the end of the through part between adjacent through grooves.

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

[0012] In a preferred embodiment, a support frame is protruded at the middle of the connecting portion, and the support frame supports the skin film 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 to the inner wall of the connecting portion, and the skin film assembly is arranged through the support ring.

[0014] In a preferred embodiment, a hinge groove is formed on the upper side of the extension portion, and the driving mechanism is hingedly connected inside the extension portion and extends at the hinge groove.

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

[0016] In a preferred embodiment, guide ribs are protruded on both sides of the lower folding portion and the inner wall of the extension portion.

[0017] In a preferred embodiment, the outer diameters of the through portion, the connecting portion and the extension portion are sequentially reduced.

[0018] The gas pipeline micro-leakage automatic closing valve comprises the valve shell, and further comprises a skin film assembly and a valve cover, and the skin film assembly is tightly and sealingly connected between the valve cover and the valve shell.

[0019] The valve shell and the gas pipeline micro-leakage automatic closing valve have the following advantages

[0020] Advantages:

[0021] The valve shell comprises a through portion, a connecting portion and an extension portion, the through portion, the connecting portion and the extension portion are integrally formed or fixedly connected in sequence, a through groove is formed through the outer wall of the through portion, the connecting portion is sealingly and fixedly connected with the gas valve pipeline, the extension portion is connected with a driving mechanism, and the driving mechanism drives the skin film assembly. The gas pipeline micro-leakage automatic closing valve comprises a valve shell, and further comprises a skin film assembly and a valve cover, and the skin film assembly is tightly and sealingly connected between the valve cover and the valve shell.

[0022] The valve shell and the gas pipeline micro-leakage automatic closing valve thereof, the symmetrical distribution of the valve shell guide groove ensures the rapid transmission of pressure change, and significantly improves the detection sensitivity. Integrated or fixed connection, reducing the number of components, reducing the assembly complexity. The opening of the skin film assembly is realized by the driving mechanism, the outer diameter of the extension of the valve shell is reduced, which is convenient for combination with the driving mechanism and installation in narrow space. The support frame provides radial support for the skin film assembly and limits its deviation. The support rods distributed on the outer wall of the support ring form a hollow structure, which not only supports the skin film assembly, but also ensures the smooth flow path of the gas, avoiding pressure imbalance caused by structural obstruction. The guide ribs on the inner wall of the valve shell limit the driving mechanism and improve the structural stability. The valve cover and the valve shell are fixed and compressed through the threaded connection hole to seal the skin film assembly, which enhances the connection stability. The cover body of the valve cover and the guide piece communicate with the external air pressure, and form a stable air pressure cavity between the valve cover and the valve shell, so that the skin film assembly can respond in time to push the closing valve to close and seal the gas when the gas pipeline micro-leakage occurs. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0024] Figure 1 It is a structure schematic view of the valve shell according to an embodiment of the present application.

[0025] Figure 2 It is another angle structure schematic view of the valve shell according to an embodiment of the present application.

[0026] Figure 3 It is a structure schematic view of the support frame and the threaded connection hole position of the valve shell according to an embodiment of the present application.

[0027] Figure 4 It is a sectional view of the valve shell according to an embodiment of the present application.

[0028] Figure 5 It is a structure schematic view of the driving mechanism of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present application.

[0029] Figure 6 It is a structure schematic view of the driving mechanism of the gas pipeline micro-leakage automatic closing valve according to an embodiment of the present application.

[0030] Figure 7A cross-sectional view of a valve shell and a valve cover clamping diaphragm state of a gas pipeline micro-leak automatic closing valve according to an embodiment of the present disclosure;

[0031] Figure 8 A cross-sectional view of a gas pipeline micro-leak automatic closing valve according to an embodiment of the present disclosure.

[0032]

Main component symbol description

[0033] 01, valve shell;

[0034] 011, through part; 012, connecting part; 013, extension part;

[0035] 1, through groove;

[0036] 2, driving mechanism;

[0037] 21, hinged rod; 22, upper folding part; 23, lower folding part;

[0038] 3, threaded connection hole;

[0039] 4, support frame;

[0040] 41, support rod; 42, support ring;

[0041] 5, hinged groove;

[0042] 6, hinged hole;

[0043] 7, guide ridge;

[0044] 02, valve cover;

[0045] 03, diaphragm assembly. DETAILED DESCRIPTION

[0046] The valve shell and the gas pipeline micro-leak automatic closing valve according to the present application will be further described in detail below in combination with the drawings and the embodiments of the present application.

[0047] 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 in combination with the drawings and the embodiments.

[0048] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0049] 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, since the scope of the present application will be limited only by the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. The term "comprises" and variations thereof, such as "comprising" and "comprises", as used herein, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "about" when used before a numerical designation, has its usual meaning in the field of chemistry, for example 1.5 ± 0.2 would include 1.35 to 1.65.

[0050] For the purposes of this disclosure, the terms "first", "second", and the like, do not imply that a sequence or order of importance of one element before or over another element or elements. Rather, the terms "first", "second", and the like are used arbitrarily and are merely intended to distinguish various components of the present application. Unless otherwise specified, the use of the ordinal adjectives "first", "second", and the like, in the claims to indicate that a particular element has been mentioned in the specification and claims several times. Thus, these terms have been used merely to first introduce a feature of certain embodiments. However, alongside the specific features introduced by these terms, the application can also encompass one or both features of the embodiments.

[0051] According to Figures 1-7 As shown, the valve housing 01, comprising: the lead-through part 011, the connecting part 012 and the extension part 013, the lead-through part 011, the connecting part 012 and the extension part 013 are integrally formed or fixedly connected in turn. The outer wall of the connecting part 012 of the valve housing 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, and the diaphragm is tightly sealed between the valve cover 02. Under this structure, in order to ensure that the gas can flow normally, the lead-through groove 1 is arranged through the outer wall of the lead-through part 011, the lead-through groove 1 can make the gas enter the gas valve pipeline from one end through the lead-through groove 1, and when the diaphragm leaks slightly in the valve body, the pressure difference changes, so that the diaphragm is close to the valve housing 01 to seal and block the gas. In order to ensure that the diaphragm can be opened again when the gas in the gas pipeline flows normally, the extension part 013 is connected with the driving mechanism 2, so that the driving mechanism drives the diaphragm assembly 03. The driving mechanism 2 is connected with the extension part 013 of the valve housing 01, and the driving mechanism 2 can drive the diaphragm assembly 03 away from the valve housing 01, so that the gas flows, and the driving mechanism 2 can automatically reset after driving the diaphragm.

[0052] In order to increase the gas flow of the valve shell 01, and to fix the valve shell 01 with the diaphragm and the valve cover 02, the through groove 1 is provided with multiple, the position between adjacent through grooves 1, the end of the through part 011 is provided with a threaded connection hole 3. By providing multiple through grooves 1 on the edge of the valve shell 01, the gas flow is not affected under the existing structure. When there is no micro leakage in the valve shell 01, the gas can flow smoothly, the internal thread is arranged in the threaded connection hole 3, the threaded connection hole 3 is fixedly connected with the valve cover 02 and the fixed shell 41 and the diaphragm, so that the diaphragm can be tightly fixed by the valve shell 01 and the valve cover 02, and the connection strength is guaranteed. And when the diaphragm blocks the gas, the through part connected with the valve cover 02 communicates with the external atmospheric pressure of the gas pipeline, so that it forms a stable gas pressure chamber with the diaphragm assembly 03 close to the valve cover 02. When the valve body appears micro leakage, the diaphragm acts under the action of pressure difference, and rapidly generates diaphragm deformation to push the diaphragm to close the gas passage. The side of the diaphragm is a stable gas pressure chamber connected with the external atmosphere, and the other side is in a normal gas flow state. Because the internal pressure of the gas pipeline is greater than the external pressure, the diaphragm produces elastic deformation and maintains the open state. When the micro leakage occurs, the internal pressure of the gas pipeline leaks, and the pressure difference is less than the pressure of the gas pressure chamber connected with the external atmosphere, or equal to it. The diaphragm cannot maintain the elastic deformation state to seal the gas pipeline with the valve shell 01. Therefore, the diaphragm can respond quickly. Because the position of the through groove 1 is in the connecting part 012, the gas will not pass through the diaphragm and the valve shell 01 which are in the blocking state.

[0053] In order to ensure the stability of the gas flow and the stability of the connection between the valve shell 01, the valve cover 02 and the diaphragm, avoid the risk of gas leakage through the connection between the valve cover 02 and the diaphragm due to poor connection, the through groove 1 is provided with four, the threaded connection hole 3 is provided with four, the distance between adjacent through grooves 1 is greater than the diameter of the threaded connection hole 3, and the threaded connection hole 3 is arranged at the middle position between adjacent through grooves 1. By arranging four through grooves 1 and four threaded connection holes 3, and arranging the threaded connection hole 3 at the middle position between adjacent through grooves 1, the gas flow path is increased, and the stability of the connection between the valve shell 01, the valve cover 02 and the diaphragm is enhanced by the symmetrically distributed threaded connection holes 3. The design that the distance between the through grooves 1 is greater than the diameter of the threaded hole 3 avoids the interference in processing, ensures the stability of the structure, and improves the sensitivity of micro leakage detection.

[0054] In order to enable the diaphragm assembly 03 to be supported within the valve housing 01 and ensure its stable movement trajectory, a support frame 4 is protruded in the middle of the connecting portion 012, which supports the diaphragm assembly 03. The support frame 4 inside the valve housing 01 can provide support force to the diaphragm assembly 03 connected inside the valve housing 01, limit the radial movement of the diaphragm assembly 03, ensure the trajectory of the diaphragm assembly 03 when the diaphragm is opened and sealed, and also provide a certain direction to the displacement caused by the deformation of the diaphragm, ensuring that the diaphragm can abut against the valve housing 01 for sealing after responding each time the gas is blocked. At the same time, it can also avoid the deformation of the diaphragm after being fixedly connected with the diaphragm assembly 03 due to the weight of the diaphragm assembly 03.

[0055] In order to ensure that the gas can pass through the support ring, 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 diaphragm assembly 03 passes through the support ring 42. The outer wall of the support ring 42 is integrally connected with the support rod 41 and integrally formed inside the connecting portion. When the support ring 42 provides support force to the diaphragm assembly 03, the support rods 41 are distributed 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 flow of gas.

[0056] In order 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 portion 013, the driving mechanism 2 is hinged inside the extension portion 013 and extends at the hinge groove 5. By providing the hinge groove 5 on the upper side of the extension portion 013, the hinge part of the driving mechanism 2 can be embedded inside the valve housing 01 and extended along the hinge groove 5, realizing the flexible movement of the driving mechanism 2 in a limited space. The provision of the hinge groove 5 not only provides a precise guide path for the rotation of the driving mechanism 2, avoiding interference with the inner wall of the valve housing 01 during movement, but also limits the movement range of the driving mechanism 2, ensuring that it only rotates within a set angle, thereby improving the stability and repeatability of the action. In addition, the cooperation of the hinge groove 5 and the driving mechanism 2 reduces the redundant volume of the internal structure of the valve body, enhances the overall compactness, simplifies the assembly process, reduces the friction loss of the moving parts, and prolongs the service life of the driving mechanism 2.

[0057] In order to enable the driving mechanism 2 to perform a rotating movement within the extension portion 013 to realize the driving of the skin film assembly 03, the driving mechanism 2 comprises: a hinged rod 21, an upper folding portion 22 and a lower folding portion 23, and the upper folding portion 22 and the lower folding portion 23 are integrally formed in a bent structure. Through the specific shape of the upper folding portion 22 and the lower folding portion 23 of the driving mechanism 2, the driving mechanism 2 can be arranged inside the extension portion 013, the use space inside the valve is reduced, the compactness between structures is increased, and the bent structure of the driving mechanism 2 ensures that the driving mechanism 2 does not interfere with the inner wall of the extension portion 013 when the driving mechanism 2 rotates through the hinged hole 6. The hinged hole 6 is arranged at the upper end of the lower folding portion 23, the hinged rod 21 passes through the hinged hole 6, and the two ends of the hinged rod 21 are rotationally connected to the inner wall of the extension portion 013. When the lower folding portion 23 rotates through the hinged rod 21, it abuts against the end face of the skin film assembly 03 and rotates to drive the skin film assembly 03 to move axially away from the driving mechanism 2.

[0058] In order to further limit the lower folding portion 23, guide ribs 7 are arranged on the inner wall of the extension portion 013 at the positions of the two sides of the lower folding portion 23. The guide ribs 7 ensure that the lower folding portion 23 always moves in the same vertical plane each time the hinged rod rotates, so that the lower folding portion 23 can smoothly touch the driving rod 421 each time.

[0059] In order to improve the adaptability of the valve body and other pipelines, the outer diameters of the lead-through portion 011, the connecting portion 012 and the extension portion 013 are gradually reduced. Through the step-by-step design of the gradually reduced outer diameters, the lead-through portion 011 can be easily installed with the lead-through member 22. Reducing the outer diameter of the extension portion 013 makes it easier to combine with the driving mechanism 2, enhances the compactness of the structure, and facilitates installation and maintenance in a small space.

[0060] According to Figure 8 As shown in the drawings, in order to realize the automatic closing of the gas pipeline when a slight leakage occurs and ensure the sealing reliability during long-term use through the combination of the valve shell 01 and the skin film assembly 03. The gas pipeline slight leakage automatic closing valve comprises the valve shell 01, the skin film assembly 03 and the valve cover 02, and the valve cover 02 and the valve shell 01 are tightly and sealingly connected to the skin film assembly 03. The valve shell 01 and the valve cover 02 tightly and sealingly seal the skin film assembly 03 to form a closed cavity. When a slight leakage of gas causes a pressure difference, the skin film quickly abuts against the valve shell 01 to block the gas; under normal conditions, the skin film assembly 03 is controlled by the driving mechanism to push the gas to flow. The cooperation of multiple structures improves the response speed of the slight leakage, and the design of the support frame 4 and the guide ribs 7 ensures the accuracy of the skin film action, prolonging the service life of the equipment.

[0061] The above is only a preferred embodiment of the present application, and is not intended to limit the protection scope of the present application.

Claims

1. A valve housing, characterized in that It includes: The through groove (1) is provided in 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 the driving mechanism (2), so that the driving mechanism (2) drives the skin film assembly (03).

2. The valve housing of claim 1, wherein, A plurality of through grooves (1) are provided, and a threaded connection hole (3) is provided at the end of the through part (011) between adjacent through grooves (1).

3. The valve housing of claim 2, wherein, The through groove (1) is provided with four through grooves (1), and the threaded connection hole (3) is provided with four threaded connection holes (3). The distance between adjacent through grooves (1) is greater than the diameter of the threaded connection hole (3), and the threaded connection hole (3) is provided at the intermediate position of adjacent through grooves (1).

4. The valve housing of claim 1, wherein, The support frame (4) is provided in the middle of the connecting part (012), and the support frame (4) supports the skin film assembly (03).

5. The valve housing of claim 4, wherein, The support frame (4) includes: a support rod (41) and a support ring (42), the support ring (42) is integrally formed with the support rod (41), 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).

6. The valve housing according to any one of claims 1-5, characterized in that The extension part (013) is provided with a hinge groove (5) on the upper side, the driving mechanism (2) is hinged in the extension part (013), and the driving mechanism (2) is extended at the hinge groove (5).

7. The valve housing of claim 6, wherein, The driving mechanism (2) includes: a hinge rod (21), an upper folding part (22) and a lower folding part (23), the upper folding part (22) and the lower folding part (23) are integrally formed in a bending structure, the hinge hole (6) is provided at the upper end of the lower folding part (23), the hinge rod (21) passes through the hinge hole (6), and the hinge rod (21) is rotatably connected with the inner wall of the extension part (013).

8. The valve housing of claim 7, wherein, The extension part (013) is provided with a guide protrusion (7) on the inner wall of the extension part (013).

9. The valve housing according to any one of claims 1-5, characterized in that The outer diameters of the through part (011), the connecting part (012) and the extension part (013) are gradually reduced.

10. A gas pipeline micro-leak automatic shut-off valve characterized by, The valve housing of any one of claims 1-9 further comprises a skin film assembly (03) and a valve cover (02), the valve cover (02) and the valve housing (01) are tightly sealed and connected with the skin film assembly (03).

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