Gas tightness detection device for gas meter

Abstract

The utility model discloses a gas meter gas tightness detection device, which comprises a detection table and a vertical frame arranged on the detection table, a placement seat is arranged on the detection table, a limiting groove matched with the lower end face of a gas meter body is formed in the placement seat, positioning clamping assemblies are symmetrically arranged on the two sides of the placement seat, and the vertical frame is arranged on the detection table. The utility model relates to the technical field of gas meter gas tightness detection, and uses the vertical adjusting structure to adjust the height of the elastic pressing assembly and the mounting rack. The gas inlet sealing connecting plug and the gas exhaust sealing connecting plug are inserted into a gas inlet connector and a gas exhaust connector of the gas meter body correspondingly and matched with the high-pressure gas injection component to inject high-pressure gas into the gas meter body after being connected in place, the pressure metering component is used for monitoring gas pressure, and when the gas pressure reaches a set value, gas injection is stopped and pressure maintaining is conducted; and the gas pressure change is observed, so that the gas tightness verification of the gas meter body is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meter airtightness detection, in particular to a gas meter airtightness detection device. Background Technique

[0002] A gas meter is an instrument used to measure the consumption of gas, which is composed of a sealed shell, a movement, and a counter. Once the gas with a certain pressure leaks from the sealed shell of the gas meter during use, it will endanger people's lives. Therefore, the airtightness detection of the gas meter is particularly important, and it is necessary to detect the airtightness of the gas meter after assembly and before it is put into use. There are two common methods for detecting the airtightness of a gas meter, namely dry comparison and water test. At present, when detecting the airtightness of a gas meter, most of the threaded connections between the connection end and the detection end on the gas meter are carried out manually. After the airtightness detection of the gas meter is completed, the threaded connection between the connection end and the detection end is removed. The operations of "screwing on" and "screwing off" the connection end and the detection end on the gas meter need to be repeated continuously. Such an operation method not only increases the labor intensity of the operator, but also causes a decrease in the verification efficiency of the gas meter. In view of this, in-depth research on the above problems has led to the generation of this case. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a gas meter airtightness detection device, which solves the problems raised in the background technique.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions: A gas meter airtightness detection device includes a detection table and a vertical frame arranged on the detection table. A placement seat is provided on the detection table, and a limit groove matching the lower end face of the gas meter body is opened on the placement seat. Positioning and clamping components are symmetrically arranged on both sides of the placement seat. A vertical adjustment structure is installed at the position of the top cross beam of the vertical frame. A fixed seat is installed on the moving end of the vertical adjustment structure. An elastic pressing component is provided below the fixed seat. An installation frame is provided below the elastic pressing component. An air inlet sealing plug joint and an exhaust sealing plug joint are arranged on the installation frame. The top of the air inlet sealing plug joint is connected to a high-pressure gas injection component, and the top of the exhaust sealing plug joint is connected to a pressure measuring component;

[0005] The air inlet sealing plug joint and the exhaust sealing plug joint both include a fixed pipe, an annular limit seat, a conical joint, and a sealing rubber ring. The fixed pipe is inserted into the installation frame. The annular limit seat is welded to the lower end of the fixed pipe. The conical joint is installed at the lower end of the annular limit seat and matches the top joint of the gas meter body. The sealing rubber ring is sleeved on the conical joint.

[0006] The above elastic pressing assembly includes a compression spring, a telescopic column, a top block, and a pressure sensor. The compression spring is arranged on the mounting bracket and connected to the fixed seat. The telescopic column is inserted into the compression spring and is connected to the mounting bracket and the fixed seat at its upper and lower ends respectively. The top block is installed on the upper end face of the mounting bracket. The pressure sensor is arranged on the lower end face of the fixed seat and corresponds to the top block.

[0007] The above high-pressure gas injection component includes a flexible gas injection pipe, a one-way valve, and a stop valve. One end of the flexible gas injection pipe is connected to a high-pressure nitrogen storage tank, and the other end is connected to an air inlet sealing plug connector. The one-way valve is arranged on the flexible gas injection pipe and the conduction direction points to the side of the air inlet sealing plug connector. The stop valve is installed on one side of the one-way valve.

[0008] The above pressure measuring component includes an L-shaped exhaust pipe and a barometer. The L-shaped exhaust pipe is installed on the exhaust sealing plug connector. The barometer is arranged on the L-shaped exhaust pipe.

[0009] The above vertical adjustment structure includes a hydraulic cylinder, a guide seat, and a guide rod. The hydraulic cylinder is arranged on the cross beam of the vertical frame in the vertical direction, and its telescopic end is vertically downward and connected to the fixed seat. The guide seats are symmetrically arranged on both sides of the hydraulic cylinder. The guide rod slidably penetrates through the guide seat and is connected to the fixed seat.

[0010] The above positioning and clamping assembly includes a cylinder and a U-shaped jaw. The cylinders are symmetrically arranged on the side walls of the vertical frame in the horizontal direction. The U-shaped jaw is installed on the telescopic end of the cylinder. A rubber protection strip is attached to the inner side of the U-shaped jaw.

[0011] The utility model provides a gas meter airtightness detection device, which has the following beneficial effects: In this gas meter airtightness detection device, a placement seat and a positioning and clamping assembly are provided on the detection table for limiting and fixing the gas meter body. A vertical adjustment structure is installed at the top of the vertical frame. The vertical adjustment structure is used to adjust the heights of the elastic pressing assembly and the mounting bracket, and then insert the air inlet sealing plug connector and the exhaust sealing plug connector into the air inlet interface and the exhaust interface of the gas meter body respectively to achieve sealed contact at the connection positions. After the connection is in place, cooperate with the high-pressure gas injection component to inject high-pressure gas into the gas meter body, and use the pressure measuring component to monitor the air pressure. When the air pressure reaches the set value, stop injecting gas and maintain the pressure, and observe the change of gas pressure, so as to complete the airtightness verification of the gas meter body. After the verification is completed, control the vertical adjustment structure to reset and release the limiting effect on the gas meter body, and perform the airtightness detection operation of the next gas meter body. Description of the Drawings

[0012] Figure 1 It is the front view structural schematic diagram of the gas meter airtightness detection device described in the utility model.

[0013] Figure 2 The sectional structure schematic diagram of the A-A position of the present utility model Figure 1 .

[0014] Figure 3 The partial enlarged structure schematic diagram of the present utility model Figure 1 .

[0015] In the figure: 1, detection table; 2, vertical frame; 3, placing seat; 4, fixing seat; 5, mounting frame; 6, fixing pipe; 7, annular limiting seat; 8, conical joint; 9, sealing rubber ring; 10, compression spring; 11, telescopic column; 12, top block; 13, pressure sensor; 14, gas injection pipe; 15, one-way valve; 16, stop valve; 17, L-shaped exhaust pipe; 18, barometer; 19, hydraulic cylinder; 20, guiding seat; 21, guide rod; 22, air cylinder; 23, U-shaped clamp; 24, rubber protection strip. Specific embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Embodiment: Combine the specification appendix Figures 1-3It can be seen that in order to solve the problem of high manual labor intensity during the airtightness detection of gas meters in the prior art, the present application specifically designs an airtightness detection device for gas meters, which includes a detection table 1 and a vertical frame 2 arranged on the detection table 1. A placement seat 3 is provided on the detection table 1, and a limit groove matching the lower end face of the gas meter body is opened on the placement seat 3. Positioning and clamping components are symmetrically arranged on both sides of the placement seat 3. A vertical adjustment structure is installed at the position of the top cross beam of the vertical frame 2. A fixed seat 4 is installed on the moving end of the vertical adjustment structure. An elastic pressing component is provided at the lower part of the fixed seat 4, and an installation frame 5 is provided at the lower part of the elastic pressing component. An air inlet sealing plug joint and an exhaust sealing plug joint are arranged on the installation frame 5. The top of the air inlet sealing plug joint is connected to a high-pressure gas injection component, and the top of the exhaust sealing plug joint is connected to a pressure measurement component; A placement seat 3 and positioning and clamping components are provided on the detection table 1. The gas meter body is placed on the placement seat 3, and the positioning and clamping components are used to limit and fix the gas meter body. The above positioning and clamping components include a cylinder 22 and a U-shaped claw 23. The cylinders 22 are symmetrically arranged along the horizontal direction on the side walls of the vertical frame 2. The U-shaped claw 23 is installed on the telescopic end of the cylinder 22. A rubber protection strip 24 is attached to the inner side of the U-shaped claw 23, which can cooperate with the placement seat 3 to realize the limit and fixation of the gas meter body. A vertical adjustment structure is installed at the top of the vertical frame 2. The height of the elastic pressing component and the installation frame 5 is adjusted by using the vertical adjustment structure, so that the air inlet sealing plug joint and the exhaust sealing plug joint are respectively inserted into the air inlet interface and the exhaust interface of the gas meter body to achieve sealed contact at the connection position. After the connection is in place, the high-pressure gas injection component is used to inject high-pressure gas into the gas meter body, and the pressure measurement component is used to monitor the air pressure. When the air pressure reaches the set value, the gas injection is stopped and the pressure is maintained, and the change of the gas pressure is observed, so as to complete the airtightness verification of the gas meter body; After the verification is completed, the vertical adjustment structure is controlled to reset, and the limit effect on the gas meter body is released to perform the airtightness detection operation of the next gas meter body; The air inlet sealing plug joint and the exhaust sealing plug joint both include a fixed pipe 6, an annular limit seat 7, a conical joint 8 and a sealing rubber ring 9. The fixed pipe 6 is inserted into the installation frame 5. The annular limit seat 7 is welded to the lower end of the fixed pipe 6. The conical joint 8 is installed at the lower end of the annular limit seat 7 and matches the top joint of the gas meter body. The sealing rubber ring 9 is sleeved on the conical joint 8. Under the pushing action of the vertical adjustment structure, the installation frame 5 moves downward, so that the conical joint 8 at the lower end of the fixed pipe 6 is inserted into the corresponding interface on the gas meter body, and the sealing rubber ring 9 is used to realize the sealing fit at the joint position.

[0018] In the specific implementation process, the above-mentioned elastic pressing assembly includes a compression spring 10, a telescopic column 11, a top block 12 and a pressure sensor 13. The compression spring 10 is arranged on the mounting bracket 5 and connected to the fixed seat 4. The telescopic column 11 is inserted into the compression spring 10 and its upper and lower ends are respectively connected to the mounting bracket 5 and the fixed seat 4. The top block 12 is installed on the upper end face of the mounting bracket 5. The pressure sensor 13 is arranged on the lower end face of the fixed seat 4 and corresponds to the top block 12. The above-mentioned vertical adjustment structure includes a hydraulic cylinder 19, a guide seat 20 and a guide rod 21. The hydraulic cylinder 19 is arranged on the cross beam of the vertical frame 2 in the vertical direction, and its telescopic end is vertically downward and connected to the fixed seat 4. The guide seats 20 are symmetrically arranged on both sides of the hydraulic cylinder 19. The guide rod 21 slidably penetrates through the guide seat 20 and is connected to the fixed seat 4. When in use, after the conical joint 8 is inserted in place, the mounting bracket 5 stops moving. The telescopic end of the hydraulic cylinder 19 continuously expands, thereby pushing the fixed seat 4 downward and squeezing the compression spring 10. The compression spring 10 and the telescopic column 11 contract, so that the top block 12 contacts the pressure sensor 13. When the pressure signal detected by the pressure sensor 13 reaches the set value, the hydraulic cylinder 19 stops acting. At the same time, under the action of the reset elastic force of the compression spring 10, the continuous pushing effect on the lower mounting bracket 5 can be ensured, and the accuracy of the detection result can be improved.

[0019] In the specific implementation process, the above-mentioned high-pressure gas injection component includes a flexible gas injection pipe 14, a one-way valve 15 and a stop valve 16. One end of the flexible gas injection pipe 14 is connected to the high-pressure nitrogen gas storage tank, and the other end is connected to the air inlet sealing plug joint. The one-way valve 15 is arranged on the flexible gas injection pipe 14 and the conduction direction points to the side of the air inlet sealing plug joint. The stop valve 16 is installed on one side of the one-way valve 15. Among them, the pressure measuring component includes an L-shaped exhaust pipe 17 and a barometer 18. The L-shaped exhaust pipe 17 is installed on the exhaust sealing plug joint, and the barometer 18 is arranged on the L-shaped exhaust pipe 17. During the detection, the high-pressure nitrogen gas storage tank and the stop valve 16 are opened to inject high-pressure nitrogen gas into the gas meter body. Observe the reading of the barometer 18 on the L-shaped exhaust pipe 17. When the reading of the barometer 18 reaches the design value, the stop valve 16 is closed for pressure holding. If the reading of the barometer 18 does not change during the pressure holding period, it means that the air tightness of the gas meter body is good and the detection is qualified. Just control the telescopic end of the hydraulic cylinder 19 to move upward and reset. The structure is simple and the degree of automation is high, and there is no need to repeatedly disassemble the connecting nuts.

[0020] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas meter air tightness detection device, comprising a detection platform and a stand arranged on the detection platform, characterized in that: A placement seat is provided on the detection table, and a limiting groove matching the lower end surface of the gas meter body is provided on the placement seat, and positioning clamping components are symmetrically provided on both sides of the placement seat, and a vertical adjustment structure is installed at the top crossbeam position of the stand, and a fixed seat is installed at the movable end of the vertical adjustment structure, and an elastic clamping component is provided at the lower part of the fixed seat, and a mounting frame is provided at the lower part of the elastic clamping component, and an air intake sealing plug joint and an exhaust sealing plug joint are provided on the mounting frame, and a high-pressure gas injection component is connected to the top of the air intake sealing plug joint, and a pressure metering component is connected to the top of the exhaust sealing plug joint; The air intake sealing plug joint and the exhaust sealing plug joint both include a fixed tube, an annular limit seat, a conical joint and a sealing rubber ring. The fixed tube is inserted into the mounting frame, the annular limit seat is welded to the lower end of the fixed tube, the conical joint is installed at the lower end of the annular limit seat and matches the top joint of the gas meter body, and the sealing rubber ring is sleeved on the conical joint.

2. A gas meter air tightness detection device according to claim 1, characterized in that: The elastic clamping assembly includes a compression spring, a telescopic column, a top block and a pressure sensor. The compression spring is arranged on a mounting frame and connected to a fixed seat. The telescopic column is inserted into the compression spring and the upper and lower ends are respectively connected to the mounting frame and the fixed seat. The top block is installed on the upper end surface of the mounting frame. The pressure sensor is arranged on the lower end surface of the fixed seat and corresponds to the top block.

3. A gas meter air tightness detection device according to claim 1, characterized in that: The high-pressure gas injection component includes a flexible gas injection pipe, a one-way valve and a stop valve. One end of the flexible gas injection pipe is connected to the high-pressure nitrogen storage tank, and the other end is connected to the air intake sealing plug joint. The one-way valve is arranged on the flexible gas injection pipe and the conduction direction points to the side of the air intake sealing plug joint. The stop valve is installed on one side of the one-way valve.

4. A gas meter air tightness detection device according to claim 1, characterized in that: The pressure metering component includes an L-shaped exhaust pipe and a barometer. The L-shaped exhaust pipe is installed on the exhaust sealing plug joint, and the barometer is arranged on the L-shaped exhaust pipe.

5. A gas meter air tightness detection device according to claim 1, characterized in that: The vertical adjustment structure includes a hydraulic cylinder, a guide seat and a guide rod. The hydraulic cylinder is arranged on the crossbeam of the frame in the vertical direction and the telescopic end is vertically downward and connected to the fixed seat. The guide seat is symmetrically arranged on both sides of the hydraulic cylinder. The guide rod slides through the guide seat and is connected to the fixed seat.

6. A gas meter air tightness detection device according to any one of claims 1 to 5, characterized in that: The positioning clamping assembly includes a cylinder and a U-shaped clamping jaw. The cylinder is symmetrically arranged on the side wall of the stand along the horizontal direction. The U-shaped clamping jaw is installed on the telescopic end of the cylinder. A rubber protective strip is attached to the inner side of the U-shaped clamping jaw.

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