Gas meter valve structure

Abstract

The utility model relates to a gas meter valve structure which comprises a front shell assembly. An air inlet and an air outlet are formed in the front shell assembly; the shell assembly is detachably assembled in the front shell assembly and communicated with the air inlet and the air outlet; a valve motor assembly; the valve plug assembly is detachably assembled on the valve plug assembly; the gas meter base meter is simple in structure, the valve plug assembly is arranged between the front shell assembly and the valve motor assembly, the valve plug assembly and the valve motor assembly are matched with each other, the valve plug assembly and the valve motor assembly can be opened when the borne pressure is larger than 10 kPa and sealed when the borne pressure is smaller than or equal to 10 kPa, and therefore the pressure difference between the inside and the outside of a valve cavity is controlled when the gas meter base meter is tested and used. And the test and use requirements are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve structures, and in particular relates to a gas meter valve structure with an air pressure valve which can be detected in a negative pressure environment. Background Art

[0002] The base meter structure of gas meters currently on the market is generally tested for sealing by pressurizing the air in the base meter cavity after production and assembly, and then performing a water test (immersing the base meter in water to observe bubbles) or a dry test (judging whether there is a leak by the pressure loss during the pressure holding time). The test has the problems of manual labor and high error, and cannot meet the requirements of high production efficiency and quality control, nor can it achieve the requirements of efficient and high-quality automated production.

[0003] In view of the above problems, it is necessary to improve them. Utility Model Content

[0004] The utility model aims to provide a gas meter valve structure with a pressure valve which is simple in structure and cleverly designed. By introducing helium detection equipment, the base meter is first evacuated to a negative pressure, and then helium is filled into the meter to detect the sealing of the base meter. After the negative pressure environment detection, the valve structure can be used normally in standard atmospheric pressure and gas pipeline pressure (gauge pressure 0-10kPa) to meet higher production and use requirements.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A gas meter valve structure comprises a front shell assembly; the front shell assembly is formed with an air inlet and an air outlet, a valve plug assembly; detachably assembled in the front shell assembly and connected with the air inlet and the air outlet; and a valve motor assembly; detachably assembled on the valve plug assembly.

[0007] As a preferred solution of the utility model, the valve plug assembly includes a stud sealing ring limiting shell, a stud sealing ring and a middle shell; the middle shell, the stud sealing ring and the stud sealing ring limiting shell are locked by snap fastening, and the stud sealing ring is compressed for sealing and limiting.

[0008] As a preferred solution of the utility model, the valve plug assembly also includes a front shell sealing gasket and a stud assembly; the front shell sealing gasket is nested on the stud assembly, and the stud assembly passes through the stud sealing ring limit shell, the stud sealing ring and the middle shell in sequence to be connected to the valve motor assembly.

[0009] As a preferred solution of the utility model, a groove is formed on the side of the middle shell close to the front shell assembly, a sealing gasket is installed in the groove, and the sealing gasket is located between the middle shell and the front shell assembly.

[0010] As a preferred solution of the utility model, the middle shell and the sealing gasket are clearance-fitted.

[0011] As a preferred solution of the utility model, the front shell assembly is circumferentially formed with a plurality of limit blocks on one side close to the middle shell, and correspondingly, a plurality of limit grooves are formed outside the middle shell. When the front shell assembly is assembled with the middle shell, the limit blocks are snap-connected and locked with the limit grooves.

[0012] As a preferred solution of the utility model, a plurality of positioning blocks are formed circumferentially on one side of the middle shell close to the valve motor assembly, and correspondingly, a plurality of positioning grooves are formed outside the valve motor assembly. When the valve motor assembly is assembled with the middle shell, the positioning blocks are locked with the positioning grooves.

[0013] As a preferred solution of the utility model, the valve motor assembly includes a motor and a screw, and the screw is driven by the motor to drive the stud assembly to move forward and backward, so that the front shell sealing gasket blocks or opens the air outlet of the front shell assembly.

[0014] As a preferred solution of the utility model, the stud assembly includes a limit sleeve, a sealing rubber, a spring, a guide rod and a stud; the sealing rubber is nested on the guide rod, the spring passes through the guide rod and is assembled to the stud, and the limit sleeve and the stud are locked by means of threads or glue.

[0015] As a preferred solution of the utility model, a thread groove is formed near one side of the stud, and the screw rod of the valve motor assembly is threadedly connected to the thread groove.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model has a simple structure. A valve plug assembly is arranged between the front shell assembly and the valve motor assembly. The valve plug assembly cooperates with the valve motor assembly and can be opened when the pressure is greater than 10kPa and sealed when the pressure is less than or equal to 10kPa, so as to control the pressure difference inside and outside the valve cavity of the gas meter base meter during testing and use, so as to meet the testing and use requirements.

[0018] 2. The utility model is cleverly designed. During helium detection, vacuum treatment will be carried out, the ambient pressure is -100kPa, the gas inside the valve is discharged from the mating surface of the stud sealing ring and the stud assembly, and the pressure inside the valve is also -100kPa. Then helium is filled in, the pressure is +50kPa, at this time helium can enter the valve through the pressure valve structure, and the pressure difference between the inside and outside of the valve reaches 10kPa, which can meet the normal working requirements of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the gas meter valve of the utility model;

[0020] Figure 2 This is a structural exploded view of the gas meter valve of the utility model;

[0021] Figure 3 It is a cross-sectional view of the gas meter valve of the utility model;

[0022] Figure 4 This is a structural exploded view of the valve plug assembly of the utility model valve;

[0023] Figure 5 It is a cross-sectional view of the valve plug assembly of the valve of the utility model;

[0024] Explanation of the accompanying drawings: 1. front shell assembly; 2. valve plug assembly; 3. valve motor assembly; 4. groove; 5. limit block; 6. limit groove; 7. positioning block; 8. positioning groove; 9. threaded groove; 10. air inlet; 11. air outlet; 2-1. front shell sealing gasket; 2-2. stud assembly; 2-3. stud sealing ring limit shell; 2-4. stud sealing ring; 2-5. sealing gasket; 2-6. middle shell; 2-2-a. limit sleeve; 2-2-b. sealing rubber; 2-2-c. spring; 2-2-d. guide rod; 2-2-e. stud; 30. motor; 31. screw. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Example:

[0028] like Figure 1-3 As shown, Figure 1 This is a schematic diagram of the structure of the gas meter valve of the utility model; Figure 2 This is a structural exploded view of the gas meter valve of the utility model; Figure 3 It is a cross-sectional view of the gas meter valve of the utility model.

[0029] A gas meter valve structure includes a front shell assembly 1; the front shell assembly 1 is formed with an air inlet 10 and an air outlet 11, a valve plug assembly 2; it is detachably assembled in the front shell assembly 1 and communicated with the air inlet 10 and the air outlet 11; a valve motor assembly 3; it is detachably assembled on the valve plug assembly 2; the utility model has a simple structure, and the valve plug assembly 2 is arranged between the front shell assembly 1 and the valve motor assembly 3. The valve plug assembly 2 cooperates with the valve motor assembly 1, and can be opened when the pressure is greater than 10kPa, and sealed when the pressure is less than or equal to 10kPa, so as to control the pressure difference between the inside and outside of the valve cavity of the gas meter base meter during testing and use, so as to meet the testing and use requirements.

[0030] The front shell assembly 1 is locked with the valve plug assembly 2 and the valve motor assembly 3 by snap fastening and is sealed by compressing the sealing ring in the structural sealing groove.

[0031] Specifically, a plurality of limit blocks 5 are formed circumferentially on one side of the front shell assembly 1 close to the middle shell 2-6, and correspondingly, a plurality of limit grooves 6 are formed outside the middle shell 2-6. When the front shell assembly 1 and the middle shell 2-6 are assembled, the limit blocks 5 are snap-connected and locked with the limit grooves 6.

[0032] A plurality of positioning blocks 7 are formed circumferentially on one side of the middle shell 2-6 close to the valve motor assembly 3. Correspondingly, a plurality of positioning grooves 8 are formed outside the valve motor assembly 3. When the valve motor assembly 3 is assembled with the middle shell 2-6, the positioning blocks 7 are locked with the positioning grooves 8.

[0033] like Figure 4-5 As shown, Figure 4 This is a structural exploded view of the valve plug assembly of the utility model valve; Figure 5 It is a cross-sectional view of the valve plug assembly of the valve of the utility model.

[0034] The valve plug assembly 2 includes a stud sealing ring limiting shell 2-3, a stud sealing ring 2-4 and a middle shell 2-6; the middle shell 2-6, the stud sealing ring 2-4 and the stud sealing ring limiting shell 2-3 are locked by snap fastening, and the stud sealing ring 2-4 is compressed to seal and limit.

[0035] The valve plug assembly 2 also includes a front shell sealing gasket 2-1 and a stud assembly 2-2; the sealing gasket front shell sealing gasket 2-1 is directly nested on the stud assembly 2-2 according to the elastic deformation characteristics of rubber, and the stud assembly 2-2 passes through the stud sealing ring limit shell 2-3, the stud sealing ring 2-4 and the middle shell 2-6 in turn to be connected with the valve motor assembly 3; the stud assembly 2-2 is finally matched with the screw structure of the valve motor assembly 3 through its threaded structure.

[0036] A groove 4 is formed on one side of the middle shell 2-6 close to the front shell assembly 1, and a sealing gasket 2-5 is installed in the groove 4. The sealing gasket 2-5 is located between the middle shell 2-6 and the front shell assembly 1; the middle shell 2-6 and the sealing gasket 2-5 are clearance-fitted; by setting the sealing gasket 2-5, the sealing performance of the connection between the middle shell 2-6 and the front shell assembly 1 is improved.

[0037] In addition, when the device is detecting helium, it will be vacuumed, the ambient pressure is -100kPa, the gas inside the valve is discharged from the mating surface of the stud seal ring 2-4 and the stud assembly 2-2, and the pressure inside the valve is also -100kPa. Then helium is filled in, the pressure is +50kPa, at this time helium can enter the valve through the pressure valve structure, and the pressure difference between the inside and outside of the valve is 10kPa, which can meet the normal working requirements of the valve.

[0038] Specifically, the valve motor assembly 3 includes a motor 30 and a screw 31 . The screw 31 is driven by the motor 30 to drive the stud assembly 2 - 2 to move forward and backward, so that the front shell sealing gasket 2 - 1 blocks or opens the air outlet 11 of the front shell assembly 1 .

[0039] The stud assembly 2-2 includes a limit sleeve 2-2-a, a sealing rubber 2-2-b, a spring 2-2-c, a guide rod 2-2-d and a stud 2-2-e;

[0040] The sealing rubber 2-2-b is directly nested on the guide rod 2-2-d according to the elastic deformation characteristics of the rubber, and then the spring 2-2-c is passed through the guide rod 2-2-d and assembled to the stud 2-2-e. Finally, the limit sleeve 2-2-a and the stud 2-2-e are locked by threads or glue to complete the entire assembly.

[0041] A thread groove 9 is formed near one side of the stud 2 - 2 - e , and the screw rod 31 of the valve motor assembly 3 is threadedly connected to the thread groove 9 .

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0043] Although this article uses more of the following terms: 1, front shell assembly; 2, valve plug assembly; 3, valve motor assembly; 4, groove; 5, limit block; 6, limit groove; 7, positioning block; 8, positioning groove; 9, thread groove; 10, air inlet; 11, air outlet; 2-1, front shell gasket; 2-2, stud assembly; 2-3, stud sealing ring limit shell; 2-4, stud sealing ring; 2-5, gasket; 2-6, middle shell; 2-2-a, limit sleeve; 2-2-b, sealing rubber; 2-2-c, spring; 2-2-d, guide rod; 2-2-e, stud; 30, motor; 31, screw, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A gas meter valve structure, characterized in that: include Front housing assembly (1); The front housing assembly (1) is formed with an air inlet (10) and an air outlet (11). A valve plug assembly (2) is detachably mounted in the front housing assembly (1) and is connected to the air inlet (10) and the air outlet (11); A valve motor assembly (3) is detachably mounted on the valve plug assembly (2); The front shell assembly (1) is fastened to the valve plug assembly (2) and the valve motor assembly (3) by means of a buckle and a seal is achieved by compressing a sealing ring in a structural sealing groove thereof; The valve plug assembly (2) further comprises a front shell sealing gasket (2-1) and a stud assembly (2-2); the front shell sealing gasket (2-1) is nested on the stud assembly (2-2), and the stud assembly (2-2) passes through the stud sealing ring limiting shell (2-3), the stud sealing ring (2-4) and the middle shell (2-6) in sequence to be connected to the valve motor assembly (3); During the helium test, a vacuum treatment is performed, the ambient pressure is a gauge pressure of -100 kPa, and the gas inside the valve is discharged from the mating surface between the stud sealing ring (2-4) and the stud assembly (2-2); The stud assembly (2-2) comprises a limit sleeve (2-2-a), a sealing rubber (2-2-b), a spring (2-2-c), a guide rod (2-2-d) and a stud (2-2-e); the sealing rubber (2-2-b) is nested on the guide rod (2-2-d), the spring (2-2-c) passes through the guide rod (2-2-d) and is assembled on the stud (2-2-e), and the limit sleeve (2-2-a) and the stud (2-2-e) are locked by means of threads or glue. A thread groove (9) is formed near one side of the stud (2-2-e), and a screw rod (31) of the valve motor assembly (3) is threadedly connected to the thread groove (9).

2. A gas meter valve structure according to claim 1, characterized in that: The valve plug assembly (2) comprises a stud sealing ring limiting shell (2-3), a stud sealing ring (2-4) and a middle shell (2-6); the middle shell (2-6), the stud sealing ring (2-4) and the stud sealing ring limiting shell (2-3) are locked by snap fastening, and the stud sealing ring (2-4) is compressed to seal and limit.

3. A gas meter valve structure according to claim 1, characterized in that: A groove (4) is formed on one side of the middle shell (2-6) close to the front shell assembly (1), a sealing gasket (2-5) is installed in the groove (4), and the sealing gasket (2-5) is located between the middle shell (2-6) and the front shell assembly (1).

4. A gas meter valve structure according to claim 3, characterized in that: The middle shell (2-6) and the sealing gasket (2-5) are clearance-fitted.

5. A gas meter valve structure according to claim 1, characterized in that: A plurality of limit blocks (5) are formed circumferentially on one side of the front shell assembly (1) close to the middle shell (2-6), and correspondingly, a plurality of limit grooves (6) are formed outside the middle shell (2-6). When the front shell assembly (1) and the middle shell (2-6) are assembled, the limit blocks (5) and the limit grooves (6) are locked in a snap connection.

6. A gas meter valve structure according to claim 5, characterized in that: A plurality of positioning blocks (7) are formed circumferentially on one side of the middle shell (2-6) close to the valve motor assembly (3); correspondingly, a plurality of positioning grooves (8) are formed outside the valve motor assembly (3); when the valve motor assembly (3) and the middle shell (2-6) are assembled, the positioning blocks (7) and the positioning grooves (8) are locked and fastened.

7. A gas meter valve structure according to claim 1, characterized in that: The valve motor assembly (3) comprises a motor (30) and a screw (31), and the screw (31) is driven by the motor (30) to drive the stud assembly (2-2) to move forward and backward, so that the front shell sealing gasket (2-1) blocks or opens the air outlet (11) of the front shell assembly (1).

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