Gas self-closing valve structure

Abstract

The utility model discloses a gas self-closing valve structure which structurally comprises a valve body, a gas cavity is arranged in the valve body, a gas inlet, a gas outlet and a mounting port which are communicated with the gas cavity are arranged on the valve body, a valve cover is mounted at the mounting port of the valve body, and a first accommodating recess is formed on the top surface of the mounting port of the valve body. A second containing concave position is formed in the position, corresponding to the first containing concave position, of the valve deck, when the valve deck is installed, the first containing concave position and the second containing concave position form a containing space, a limiting matching part matched with the containing space is formed on the outer ring of the diaphragm, the valve deck is fixedly connected with the valve body through an installation workpiece, and the installation workpiece is in threaded connection fit with the valve body. The valve cover is installed and fixed through the installation workpiece, tools are not needed during daily maintenance, the valve cover can be rapidly assembled and disassembled by loosening and tightening the installation workpiece, the use flexibility is high, operation is easy and convenient, and the maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pipeline valve technical field more specifically, it relates to a kind of gas self-closing valve structure. BACKGROUND

[0002] Pipeline gas self-closing valve is installed on low-pressure gas pipeline, when pipeline gas pressure appears under pressure, overpressure, without electricity or other external power, can automatically close and necessary manual opening device.Its principle is, permanent magnet material is magnetized into permanent memory multi-pole permanent magnet linkage mechanism according to design requirement, the change of gas pressure parameter passing through it is identified, when exceeding safety setting value, valve is automatically closed, and gas source is cut off.

[0003] At present, the Chinese patent with publication (announcement) No.CN206738653U discloses a kind of pipeline gas self-closing valve, it includes valve body, valve cover, slide rod, rocker arm, pull rod, support plate, magnet, magnetic disk and reset rod.Valve body is equipped with air cavity, and valve body is equipped with air inlet, air outlet and mounting port;Valve cover bottom is equipped with diaphragm, and valve cover is buckled in the mounting port of valve body;Reset rod is arranged on valve cover, and magnetic disk is connected at the bottom of reset rod.Magnet is arranged at the top of pull rod;Support plate is arranged on the inner wall of air cavity, and support plate is iron plate, and limit block is equipped on the side wall of pull rod, and support plate is located between limit block and magnet;Slide rod is inserted in air inlet, and rocker arm is hinged on the inner wall of air cavity by cylindrical pin, one end of rocker arm is connected with slide rod, and the other end of rocker arm is slidably inserted in pull rod.

[0004] The valve cover of the above-mentioned "pipeline gas self-closing valve" is fixed with the valve body by means of hexagonal socket head cap screws, although this fixed structure can ensure the stability of the connection, it still has the following problems in actual use:

[0005] 1. inconvenient maintenance: when the internal components of the valve (such as diaphragm, magnet, gasket, etc.) are worn out or fail due to long-term use, it is necessary to disassemble a plurality of screws or welding points, which is complex and time-consuming, affecting the maintenance efficiency. Especially in emergency situations, it is impossible to quickly replace the faulty components, which may cause gas leakage or equipment downtime.

[0006] 2. Strong tool dependence: the traditional fixed structure usually needs to use special tools (such as hexagonal socket wrench, screwdriver, etc.) for disassembly and installation, which increases the operation difficulty and maintenance cost; for ordinary users, lack of professional tools may lead to misoperation or damage to the valve.

[0007] 3. Poor adaptability: different application scenarios have different requirements for valve maintenance frequency and convenience; the traditional fixed structure cannot flexibly adapt to the needs of high-frequency maintenance or quick repair, limiting the application range of the valve. In view of the above problems, a gas self-closing valve structure is proposed to solve the above problems. UTILITY MODEL CONTENT

[0008] In view of the deficiencies of the prior art, the gas self-closing valve structure is provided to solve the above technical problems.

[0009] To achieve the above object, the utility model provides the following technical scheme: a gas self-closing valve structure, including the valve body and being equipped with the air cavity in the valve body, the air inlet, the gas outlet and the installation mouth that are all communicated with the air cavity are arranged on the valve body, the valve cover is installed at the installation mouth of the valve body, the bottom of valve cover is equipped with the diaphragm and the diaphragm seals the installation mouth, the reset rod is slidably arranged on the valve cover and is connected with the diaphragm, one end of the reset rod in the valve body is connected with the valve core assembly, the first accommodation recess is formed on the top surface of the installation mouth of the valve body, the second accommodation recess is formed on the corresponding place of the first accommodation recess of the valve cover, the first accommodation recess and the second accommodation recess form the accommodation space when the valve cover is installed, the outer ring of the diaphragm is formed with the limiting cooperation part that is adapted to the accommodation space, the valve cover is fixedly connected with the valve body through the installation work piece, and the installation work piece is in threaded connection with the valve body.

[0010] The utility model further sets up: the installation work piece is annular structure, the inner thread is formed on the inner side of the installation work piece, the outer thread is formed on the outer side of the installation mouth of the valve body, and the inner buckle part that is adapted to the valve cover is formed on the upper end of the installation work piece.

[0011] The utility model further sets up: the outer periphery of the installation work piece is formed with a plurality of anti -skid muscle strips.

[0012] The utility model further sets up: the installation mouth of the valve body is formed with the third accommodation recess on the outer ring of the first accommodation recess, the sealing convex ring is formed at the center of the third accommodation recess, and the sealing cooperation part is formed on the corresponding place of the third accommodation recess of the valve cover.

[0013] The utility model further sets up: the sealing convex ring is formed with the assembly groove on the upper end, and the sealing sleeve is installed in the assembly groove.

[0014] The utility model further sets up: the anti -drop mechanism is further arranged between the sealing convex ring and the sealing sleeve, and the anti -drop mechanism includes the wedge-shaped part arranged at both ends of the sealing sleeve and the wedge-shaped groove arranged at both sides of the assembly groove.

[0015] The utility model further sets up: the sealing cooperation part is formed with two limiting ribs at the corresponding place of the sealing convex ring.

[0016] In conclusion, the utility model has the following beneficial effects: the utility model realizes the installation and fixation of the valve cover through the installation work piece, does not need to rely on the tool during routine maintenance, can realize the quick mounting and dismounting of the valve cover through the loose installation work piece, has higher use flexibility, is simple and convenient to operate, improves the maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of 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 prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 It is Figure 1 It is a schematic diagram of the local structure of A in the middle.

[0020] Reference signs: 1, valve body; 10, air cavity; 11, air inlet; 12, air outlet; 13, reset rod; 14, valve core assembly; 2, mounting port; 20, diaphragm; 21, first accommodating recess; 22, second accommodating recess; 23, limiting matching part; 24, third accommodating recess; 25, sealing convex ring; 26, sealing matching part; 27, limiting rib; 28, internal thread; 29, external thread; 3, valve cover; 4, mounting workpiece; 40, inner buckle part; 41, anti-skid rib; 5, assembly groove; 50, sealing sleeve; 51, wedge-shaped part; 52, wedge-shaped groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Please refer to Figures 1-2As shown, the utility model discloses a gas self -closing valve structure, including the valve body 1 and being equipped with the air cavity 10 in the valve body 1, be equipped with the air inlet 11, the gas outlet 12 and the installation mouth 2 with the air cavity 10 all intercommunication on the valve body 1, the valve cover 3 is installed in the installation mouth 2 at the valve body 1, the bottom of valve cover 3 is equipped with diaphragm 20 and diaphragm 20 sealed installation mouth 2, reset rod 13 is slidably worn on valve cover 3 and is connected with diaphragm 20, one end of reset rod 13 in the valve body 1 is connected with valve core subassembly 14, the first accommodation recess 21 is formed in the top surface of installation mouth 2 at the valve body 1, the second accommodation recess 22 is formed in the corresponding place of first accommodation recess 21 at valve cover 3, and the first accommodation recess 21 and the second accommodation recess 22 form the accommodation space when valve cover 3 is installed, the outer ring of diaphragm 20 is formed with the limiting cooperation part 23 matched with the accommodation space, the valve cover 3 is fixedly connected with the valve body 1 through the installation work piece 4, and the installation work piece 4 is threadedly connected with the valve body 1.

[0023] In use, the utility model gas self -closing valve structure is installed in the preset position, when needing manual control gas pipeline's on-off, manually operating knob drives reset rod 13 to act, reset rod 13 drives valve core subassembly 14 to act to control the on-off of pipeline, the structure and cooperation of valve cover 3, knob, reset rod 13, diaphragm 20, valve core subassembly 14 belong to prior art, and the utility model does not make superfluous repetition;

[0024] When installing valve cover 3, align valve cover 3 with installation mouth 2 and install, the opening of installation mouth 2 is annular structure, and the first accommodation recess 21 and the second accommodation recess 22 form the accommodation space when valve cover 3 is installed, and the accommodation interval realizes the limiting fixation of diaphragm 20 through the cooperation between the limiting cooperation part 23, after valve cover 3 is installed in place, the valve cover 3 is fixedly connected with the valve body 1 through the threaded connection cooperation between the installation work piece 4 and the valve body 1, when needing to maintain inside valve body 1, unscrewing installation work piece 4 can remove valve cover 3;

[0025] The utility model sets up installation work piece 4 to realize the installation fixation of valve cover 3, does not need to rely on tool when routine maintenance, and the quick assembly and disassembly of valve cover 3 can be realized through the loose installation work piece 4, and the use flexibility is higher, and the operation is simple and convenient, improves maintenance efficiency.

[0026] The installation work piece 4 is annular structure matched with installation mouth 2, and the inner thread 28 is formed on the inner side of installation work piece 4, and the outer thread 29 is formed on the outer side of valve body 1 at installation mouth 2, and the inner buckle part 40 matched with valve cover 3 is formed on the upper end of installation work piece 4.

[0027] In use, after valve cover 3 is installed in place, align installation work piece 4 with installation mouth 2 and sleeve into, then tighten installation work piece 4 through threaded connection cooperation and be fixedly connected with valve body 1 and realize the limiting fixation of valve cover 3 through inner buckle part 40.

[0028] The outer circumferential surface of the installation workpiece 4 is formed with a plurality of anti-skid ribs 41.

[0029] In use, the anti-skid ribs 41 facilitate the user to manually operate the installation workpiece 4.

[0030] The valve body 1 installation port 2 is located outside the first accommodating recess 21 and is formed with a third accommodating recess 24. The center of the third accommodating recess 24 is formed with a sealing convex ring 25. The valve cover 3 is located at the corresponding position of the third accommodating recess 24 and is formed with a sealing matching part 26.

[0031] In use, the third accommodating recess 24 has a "convex" cross section, and the sealing matching part 26 is adapted to the third accommodating recess 24 and has a "concave" cross section. The hard seal between the valve cover 3 and the valve body 1 is achieved by the cooperation between the sealing convex ring 25 and the sealing matching part 26. The first accommodating recess 21, the second accommodating recess 22, and the third accommodating recess 24 all have a ring structure.

[0032] The upper end of the sealing convex ring 25 is formed with an assembly groove 5, and the assembly groove 5 is installed with a sealing sleeve 50. The sealing sleeve 50 is an elastic rubber ring.

[0033] In use, the sealing sleeve 50 is provided between the valve cover 3 and the valve body 1 to provide a layer of soft seal. The double seal provided by the hard seal and the soft seal effectively improves the sealing effect between the valve cover 3 and the valve body 1, avoids gas leakage, and allows the sealing sleeve 50 to be replaced when the valve cover 3 is removed for daily maintenance.

[0034] A anti-disengagement mechanism is further provided between the sealing convex ring 25 and the sealing sleeve 50. The anti-disengagement mechanism includes wedge-shaped parts 51 provided at both ends of the sealing sleeve 50 and wedge-shaped grooves 52 provided on both sides of the assembly groove 5.

[0035] In use, the anti-disengagement mechanism ensures the installation stability between the sealing sleeve 50 and the assembly groove 5, and avoids affecting the sealing effect between the valve cover 3 and the valve body 1 due to the disengagement of the sealing sleeve 50 from the preset position.

[0036] The sealing matching part 26 is formed with two limiting ribs 27 at the corresponding position of the sealing convex ring 25.

[0037] In use, the two limiting ribs 27 provide upper limiting when the valve cover 3 is installed, and the two ends of the sealing sleeve 50 are limited by the anti-disengagement mechanism. The double limiting protection of the limiting ribs 27 and the anti-disengagement mechanism effectively ensures the installation stability of the sealing sleeve 50.

[0038] Meanwhile, it needs to be pointed out that the terms such as "front", "back", "vertical", "horizontal" and the like indicated by the utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model.

[0039] The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments only, and any technical solution belonging to the idea of the utility model belongs to the protection scope of the utility model. It should be pointed out that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A gas self-closing valve structure, comprising a valve body (1) with a gas chamber (10) inside the valve body (1), an inlet (11), an outlet (12), and a mounting port (2) communicating with the gas chamber (10) on the valve body (1), a valve cover (3) installed at the mounting port (2) of the valve body (1), a diaphragm (20) provided at the bottom of the valve cover (3) and the diaphragm (20) sealing the mounting port (2), a reset rod (13) slidably passing through the valve cover (3) and connected to the diaphragm (20), wherein one end of the reset rod (13) located inside the valve body (1) is connected to a valve core assembly (14), characterized in that: The valve body (1) is located on the top surface of the installation port (2) and is formed with a first accommodating recess (21), the valve cover (3) is located at the corresponding position of the first accommodating recess (21) and is formed with a second accommodating recess (22), the first accommodating recess (21) and the second accommodating recess (22) form an accommodating space when the valve cover (3) is installed, the outer ring of the diaphragm (20) is formed with a limiting matching part (23) matched with the accommodating space, the valve cover (3) is fixedly connected with the valve body (1) through the installation workpiece (4), and the installation workpiece (4) is in threaded connection with the valve body (1).

2. The gas self-closing valve structure according to claim 1, characterized by: The installation workpiece (4) is in a ring structure, the inner side of the installation workpiece (4) is formed with an internal thread (28), the outer side of the valve body (1) is formed with an external thread (29) on the installation port (2), and the upper end of the installation workpiece (4) is formed with an inner buckle part (40) matched with the valve cover (3).

3. Gas self-closing valve structure according to any of claims 1 or 2, characterized in that: The outer peripheral surface of the installation workpiece (4) is formed with a plurality of anti-skid ribs (41).

4. The gas self-closing valve structure according to claim 1, characterized by: The installation port (2) of the valve body (1) is located on the outer ring of the first accommodating recess (21) and is formed with a third accommodating recess (24), the center of the third accommodating recess (24) is formed with a sealing convex ring (25), and the valve cover (3) is located at the corresponding position of the third accommodating recess (24) and is formed with a sealing matching part (26).

5. The gas self-closing valve structure according to claim 4, characterized by: The upper end of the sealing convex ring (25) is formed with an assembly groove (5), and the assembly groove (5) is provided with a sealing sleeve (50).

6. The gas self-closing valve structure according to claim 5, characterized by: The sealing sleeve (50) is an elastic rubber ring.

7. The gas self-closing valve structure according to claim 6, characterized by: A anti-falling mechanism is further arranged between the sealing convex ring (25) and the sealing sleeve (50), and the anti-falling mechanism comprises wedge-shaped parts (51) arranged at both ends of the sealing sleeve (50) and wedge-shaped grooves (52) arranged on both sides of the assembly groove (5).

8. The gas self-closing valve structure according to claim 7, characterized by: The sealing matching part (26) is located at the corresponding position of the sealing convex ring (25) and is formed with two limiting ribs (27).

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