A gas meter air tightness testing device

Abstract

This utility model relates to the field of gas pipe technology, and provides a gas meter airtightness testing device, which includes a base plate, a support platform fixedly connected to the top of the base plate, a testing mechanism at the bottom of the support platform for automatic testing, an operating table fixedly connected to the top of the base plate, a clamping mechanism at the top of the operating table for clamping the device to be tested, a gas meter to be tested slidably connected to the top of the operating table, and two interfaces connected to the top of the gas meter to be tested; the testing mechanism includes an air pump, the bottom of which is fixedly connected to the top of the support platform, a telescopic rod fixedly connected to the bottom of the support platform, and a pressure plate fixedly connected to the bottom end of the telescopic rod. This technical solution solves the technical problem in the prior art where frequent threaded connections cause interface wear, reduce connection sealing, and thus affect the accuracy of test results.

Description

Technical Field

[0001] This utility model relates to the field of gas meter technology, specifically to a gas meter airtightness testing device. Background Technology

[0002] As a key device for measuring gas usage, gas meters are used in gas supply scenarios in homes, businesses, and industries. By accurately measuring gas flow, they provide a basis for gas billing and play an important role in gas safety monitoring. Their airtightness is directly related to the safety of gas use and the accuracy of metering.

[0003] Traditional gas meter airtightness testing devices use a physical testing method that involves placing the gas meter in water and observing whether bubbles appear. In this method, the gas meter is placed in a water tank, and a pressure pump is connected to inject gas into the gas meter. The airtightness is judged by observing whether bubbles are produced in the water. This testing method has obvious defects. On the one hand, the bubbles produced by tiny leaks are not obvious, leading to false judgments. On the other hand, if there is a leak in the gas meter, water will enter the meter and directly cause damage, affecting the subsequent use of the gas meter.

[0004] To address the aforementioned issues, existing technologies have abandoned water immersion testing and instead rely on manual connection of the gas meter's connection and testing ends. In practice, operators must repeatedly tighten and loosen screws to connect and disconnect the gas meter from the testing equipment. Due to the large number of gas meters being tested, this method increases the operator's workload, and each connection and disconnection is time-consuming, resulting in low calibration efficiency. Furthermore, frequent threaded connections cause wear on the interfaces, reducing the connection's sealing performance and thus affecting the accuracy of the test results. Therefore, a gas meter airtightness testing device is proposed to solve these problems. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a gas meter airtightness testing device, which solves the technical problem in the prior art that frequent threaded connections cause interface wear, reduce connection sealing, and thus affect the accuracy of test results.

[0006] According to one aspect, at least one embodiment of the present invention provides a gas meter air tightness testing device, comprising: a base plate, a support platform fixedly connected to the top of the base plate, a testing mechanism provided at the bottom of the support platform for automatic testing, an operating table fixedly connected to the top of the base plate, a clamping mechanism provided at the top of the operating table for clamping the test piece, a gas meter to be tested slidably connected to the top of the operating table, and two interfaces connected to the top of the gas meter to be tested;

[0007] The testing mechanism includes an air pump, the bottom of which is fixedly connected to the top of a support platform. A telescopic rod is fixedly connected to the bottom of the support platform, and a pressure plate is fixedly connected to the bottom end of the telescopic rod. Two port assemblies are provided at the bottom of the pressure plate, and two pressurizing assemblies are provided at the top of the pressure plate. A stabilizing assembly is provided at the top of the operating table.

[0008] As a further description of the above technical solution:

[0009] The clamping mechanism includes a push plate, the rear side of the outer wall of the push plate is slidably connected to the front part of the outer wall of the gas meter to be tested, a rotating plate is rotatably connected to the outer wall of the push plate, an insert block is fixedly connected to the bottom end of the rotating plate, an adjustment component is provided on the top of the operating table, a guide component is provided on the top of the operating table, and a fixing component is provided on the top of the operating table.

[0010] As a further description of the above technical solution:

[0011] The port assembly includes an outer tube, the top of which is fixedly connected to the bottom of a pressure plate, a tapered inner tube fixedly connected to the inner wall of the outer tube, and multiple sealing rings fixedly connected to the inner wall of the outer tube.

[0012] As a further description of the above technical solution:

[0013] The pressurization assembly includes a pressurization pump, the bottom of which is fixedly connected to the top of the pressure plate. The top of the pressurization pump is connected to an air guide pipe, and a test gauge is fixedly connected to the front side of the outer wall of the pressurization pump.

[0014] As a further description of the above technical solution:

[0015] The stabilizing component includes multiple slide bars, the bottom ends of which are fixedly connected to the top of the operating table, and the top ends of which are fixedly connected to limit plates.

[0016] As a further description of the above technical solution:

[0017] The adjusting component includes an adjusting strip, the bottom of which is fixedly connected to the top of the operating table, and the top of the adjusting strip has multiple slots.

[0018] As a further description of the above technical solution:

[0019] The guiding assembly includes two guide blocks, the bottoms of which are fixedly connected to the top of the operating table, and guide rails are slidably connected to the inner walls of the two guide blocks.

[0020] As a further description of the above technical solution:

[0021] The fixing assembly includes a rear plate, the bottom of which is slidably connected to the top of the operating table, and a mounting plate is fixedly connected to the rear side of the outer wall of the rear plate. The inner wall of the mounting plate is threaded with multiple bolts.

[0022] As a further description of the above technical solution:

[0023] The inner wall of the outer tube is slidably connected to the outer wall of the interface, and the outer wall of the tapered inner tube is slidably connected to the inner wall of the interface.

[0024] As a further description of the above technical solution:

[0025] The tops of both guide rails are fixedly connected to the bottom of the push plate, and the outer wall of the insert block is slidably connected to the inner wall of the adjusting strip.

[0026] The beneficial effects of the embodiments of this utility model are as follows:

[0027] In this invention, after the detection mechanism is activated, the port assembly and the gas meter interface form a sealed connection through the outer tube, the conical inner tube, and the sealing ring. The pressurization assembly injects gas, the detection meter monitors the pressure, and the stabilization assembly ensures that the pressure plate moves smoothly. This enables the gas meter to be quickly clamped and tested, improving the detection efficiency. Its sealed connection and stabilization structure ensure that the test results are accurate and reliable.

[0028] In this invention, by pushing the push plate closer to the gas meter, the rotating plate drives the insert block to slide within the adjusting strip. After reaching the appropriate position, it is inserted into the corresponding slot to adjust the spacing. The rear plate cooperates to complete bidirectional clamping, realizing the function of quickly adjusting the clamping spacing to adapt to gas meters of different sizes, improving clamping efficiency. The bidirectional stable clamping ensures the stability of the gas meter position during testing, avoiding the impact of shaking on the test results, and enhancing the versatility and practicality of the device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0030] Figure 1 This is a perspective view of a gas meter airtightness testing device proposed in this utility model;

[0031] Figure 2 This is a front view of a gas meter airtightness testing device proposed in this utility model;

[0032] Figure 3This is a partial structural cross-sectional view of a gas meter airtightness testing device proposed in this utility model;

[0033] Figure 4 This is a partial structural schematic diagram of a gas meter airtightness testing device proposed in this utility model;

[0034] Figure 5 This is a partial structural exploded view of a gas meter airtightness testing device proposed in this utility model.

[0035] In the diagram: 1. Base plate; 2. Support platform; 3. Detection mechanism; 301. Air pump; 302. Telescopic rod; 303. Pressure plate; 304. Port assembly; 3041. Outer tube; 3042. Conical inner tube; 3043. Sealing ring; 305. Pressurization assembly; 3051. Pressurization pump; 3052. Air guide pipe; 3053. Detection gauge; 306. Stabilization assembly; 3061. Slide rod; 3062. Limiting device 4. Operating panel; 5. Clamping mechanism; 501. Push plate; 502. Rotating plate; 503. Insert block; 504. Adjustment assembly; 5041. Adjustment strip; 5042. Slot; 505. Guide assembly; 5051. Guide block; 5052. Guide rail; 506. Fixing assembly; 5061. Rear plate; 5062. Mounting plate; 5063. Bolt; 6. Gas meter to be tested; 7. Interface. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0037] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0038] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 An embodiment of this utility model provides a gas meter air tightness testing device, including a base plate 1, a support platform 2 fixedly connected to the top of the base plate 1, a testing mechanism 3 provided at the bottom of the support platform 2, the testing mechanism 3 being used for automatic testing, an operating platform 4 fixedly connected to the top of the base plate 1, a clamping mechanism 5 provided at the top of the operating platform 4, the clamping mechanism 5 being used for clamping the test piece, a gas meter 6 to be tested slidably connected to the top of the operating platform 4, and two interfaces 7 connected to the top of the gas meter 6 to be tested.

[0043] The testing mechanism 3 includes an air pump 301, the bottom of which is fixedly connected to the top of the support platform 2, providing a stable air source for the entire testing process. A telescopic rod 302 is fixedly connected to the bottom of the support platform 2. The telescopic rod 302's extension and retraction movement drives the pressure plate 303 to rise and fall. The pressure plate 303 is fixedly connected to the bottom end of the telescopic rod 302, used to support and fix the port assembly 304 and transmit pressure. Two port assemblies 304 are provided at the bottom of the pressure plate 303 for connecting with the interface 7 of the gas meter 6 to be tested, forming a sealed gas path. 04 includes an outer tube 3041, the top of which is fixedly connected to the bottom of the pressure plate 303, serving to connect and protect the internal structure. A tapered inner tube 3042 is fixedly connected to the inner wall of the outer tube 3041, which cooperates with the inner wall of the interface 7 of the gas meter under test 6 to improve the connection seal. Multiple sealing rings 3043 are fixedly connected to the inner wall of the outer tube 3041 to enhance the sealing performance at the connection between the port assembly 304 and the interface 7. The inner wall of the outer tube 3041 is slidably connected to the outer wall of the interface 7, enabling the port assembly 304 to connect with the interface of the gas meter under test 6. The quick docking of interface 7 and the sliding connection of the outer wall of the conical inner tube 3042 to the inner wall of interface 7 further ensure gas path sealing. Two pressurizing components 305 are installed on the top of the pressure plate 303 to inject detection gas into the gas meter 6 under test and monitor the pressure. Each pressurizing component 305 includes a pressurizing pump 3051. The bottom of the pressurizing pump 3051 is fixedly connected to the top of the pressure plate 303 to provide power for pressurizing the gas meter 6 under test. A gas guide pipe 3052 is connected to the top of the pressurizing pump 3051 for transmitting the detection gas. A gauge 3053 is fixedly connected to the front side of the outer wall of 3051 to display the pressure data in the air circuit in real time. A stabilizing component 306 is set on the top of the operating table 4 to ensure the stability and accuracy of the pressure plate 303 during movement. The stabilizing component 306 includes multiple slide rods 3061. The bottom ends of the multiple slide rods 3061 are fixedly connected to the top of the operating table 4 to provide vertical guidance for the pressure plate 303. The top ends of the multiple slide rods 3061 are fixedly connected to limiting plates 3062 to limit the movement range of the pressure plate 303 and prevent excessive downward pressure.

[0044] Specifically, after the operator places the gas meter to be tested 6 on the top of the operating table 4, the clamping mechanism 5 is activated. The push plate 501 slides along the guide rail 5052 close to the gas meter to be tested 6. By rotating the rotating plate 502, the insert block 503 is inserted into the corresponding slot 5042 of the adjusting strip 5041 to fix the push plate 501. Then, the rear plate 5061 is slid to fit against the rear side of the gas meter to be tested 6. The bolts 5063 on the mounting plate 5062 are tightened to complete the bidirectional clamping. Then, the detection mechanism 3 is activated, the gas pump 301 works to supply gas, the telescopic rod 302 extends and drives the pressure plate 303 to move down. The inner wall of the outer tube 3041 of the port assembly 304 slides against the outer wall of the interface 7 of the gas meter to be tested 6, and the outer wall of the conical inner tube 3042 slides against the inner wall of the interface 7. The outer tube 3041 is connected to the inner wall of the sealing ring 3043 to achieve a sealed connection. Then, the pressurizing pump 3051 injects gas into the gas meter 6 to be tested through the gas guide pipe 3052. The pressure data is displayed in real time by the test gauge 3053 on the pressurizing pump 3051. The top slide bar 3061 of the operating table 4 ensures that the pressure plate 303 moves vertically and smoothly downward, and the limit plate 3062 restricts its movement range. When the pressure in the gas meter 6 to be tested reaches the predetermined value, the pressurizing pump 3051 is stopped. The pressure value of the test gauge 3053 is observed. After the test is completed, the gas pump 301 is turned off first. The telescopic rod 302 drives the pressure plate 303 to move upward to separate the port assembly 304 from the interface 7. Then, the clamping mechanism 5 is released to remove the gas meter 6 to be tested to complete the test process.

[0045] See attached document Figure 2 Appendix Figure 4 and attached Figure 5The clamping mechanism 5 includes a push plate 501, the rear side of which is slidably connected to the front of the outer wall of the gas meter 6 to be tested, for contacting and pushing the gas meter 6 to be tested to a suitable position from the front. A rotating plate 502 is rotatably connected to the outer wall of the push plate 501, and the position of the insert 503 can be adjusted by rotating it to accommodate gas meters 6 of different sizes. The bottom end of the rotating plate 502 is fixedly connected to the insert 503, which cooperates with the adjusting component 504 to realize the positioning and fixing of the push plate 501. The adjusting component 504 is provided on the top of the operating table 4 to provide a sliding track and positioning for the insert 503. The position of the push plate 501 can be adjusted by adjusting the distance. The adjusting assembly 504 includes an adjusting strip 5041, the bottom of which is fixedly connected to the top of the operating table 4. It serves as the basic component for the sliding and positioning of the insert block 503. The outer wall of the insert block 503 is slidably connected to the inner wall of the adjusting strip 5041, and can slide freely along the inner wall of the adjusting strip 5041 to adjust the position of the push plate 501. The top of the adjusting strip 5041 has multiple slots 5042 for inserting the insert block 503 to fix the push plate 501 in different positions. A guide assembly 505 is provided on the top of the operating table 4 to ensure that the push plate 501 is in a stable position. 1. To maintain a straight-line motion trajectory during movement, the guide assembly 505 includes two guide blocks 5051. The bottoms of both guide blocks 5051 are fixedly connected to the top of the operating table 4, providing support and guidance for the guide rail 5052. The inner walls of both guide blocks 5051 are slidably connected to the guide rail 5052, which cooperates with the guide blocks 5051 to limit the movement direction of the push plate 501. The tops of both guide rails 5052 are fixedly connected to the bottom of the push plate 501, connecting the push plate 501 to the guide assembly 505 to achieve smooth sliding. A fixing assembly 5 is provided on the top of the operating table 4. 06, used to fix the gas meter 6 to be tested from the rear and enhance the clamping stability, the fixing component 506 includes a rear plate 5061, the bottom of the rear plate 5061 is slidably connected to the top of the operating table 4, and can slide along the top of the operating table 4 to accommodate gas meters 6 of different sizes to be tested. A mounting plate 5062 is fixedly connected to the rear side of the outer wall of the rear plate 5061, providing structural support for the installation and fastening of bolts 5063. Multiple bolts 5063 are threadedly connected to the inner wall of the mounting plate 5062. By tightening the bolts 5063, the rear plate 5061 is fixed to the operating table 4 to achieve a stable clamping.

[0046] Specifically, the gas meter to be tested 6 is placed on top of the operating table 4. The clamping mechanism 5 is activated, and the push plate 501 is manually pushed along the guide rail 5052 towards the gas meter to be tested 6. The guide rail 5052 slides on the inner wall of the guide block 5051 to ensure that the push plate 501 moves in a straight line. When the push plate 501 moves, it drives the rotating plate 502 to rotate, so that the insert 503 slides on the inner wall of the adjusting strip 5041. When the push plate 501 reaches the appropriate position, the rotating plate 502 is rotated to insert the insert 503 into the corresponding size at the top of the adjusting strip 5041. Slot 5042, adjust the distance between push plate 501 and rear plate 5061, then slide rear plate 5061 to fit against the back side of gas meter 6 to be tested, and tighten it with bolt 5063 on mounting plate 5062, so that push plate 501 and rear plate 5061 form a bidirectional clamp to fix gas meter 6 to be tested. After the test is completed, rotate rotating plate 502 to pull out insert block 503, loosen bolt 5063, push push plate 501 away from gas meter 6 to be tested in the opposite direction, and finally remove gas meter 6 to be tested, completing the working cycle of clamping mechanism 5.

[0047] Working principle: The operator places the gas meter 6 to be tested on the top of the operating table 4, activates the clamping mechanism 5 to fix the gas meter 6, and then activates the detection mechanism 3. The gas pump 301 starts working to provide gas for the entire detection process. At this time, the telescopic rod 302 extends, and the pressure plate 303 connected to its bottom end moves downward. The port assembly 304 at the bottom of the pressure plate 303 then approaches the interface 7 at the top of the gas meter 6. The inner wall of the outer tube 3041 in the port assembly 304 is slidably connected to the outer wall of the interface 7, and the outer wall of the conical inner tube 3042 is slidably connected to the inner wall of the interface 7. At the same time, multiple sealing rings 3043 on the inner wall of the outer tube 3041 are connected to the interface 7. The tight fit ensures a good seal between the port assembly 304 and the interface 7, preventing gas leakage. Once the port assembly 304 and interface 7 are connected, the pressurizing assembly 305 on top of the pressure plate 303 begins to function. The pressurizing pump 3051 injects gas into the gas meter 6 under test through the gas guide pipe 3052, pressurizing the inside of the gas meter 6. During pressurization, the detection gauge 3053, fixedly connected to the front of the outer wall of the gas guide pipe 3052, monitors the pressure changes in the gas path in real time and displays the pressure data visually. Operators can understand the gas flow by observing the values ​​on the detection gauge 3053. The changing trend of the internal pressure of the gas meter under test 6 is monitored by the stabilizing component 306 on the top of the operating platform 4, which plays an important role in the operation of the detection mechanism 3. The slide bar 3061 ensures that the pressure plate 303 remains stable during downward movement, accurately aligning with the interface 7 of the gas meter under test 6 in the vertical direction to prevent misalignment. The limiting piece 3062 restricts the movement range of the pressure plate 303, preventing excessive pressure on the gas meter under test 6 and potential damage. When the internal pressure of the gas meter under test 6 reaches the predetermined value, the operation of the pressurizing pump 3051 is stopped, maintaining a stable pressure state inside the gas meter under test 6. At this time, the operator observes the pressure changes. The pressure change on the test gauge 3053 is used to determine the air tightness of the gas meter 6 under test. If the pressure value displayed on the test gauge 3053 remains basically unchanged for a period of time, it indicates that there is no gas leakage inside the gas meter 6 under test and the air tightness is good. If the pressure value continues to drop, it indicates that there is a leak in the gas meter 6 under test and the air tightness is unqualified. After the test is completed, the gas pump 301 is turned off first. Then the telescopic rod 302 drives the pressure plate 303 to move upward, so that the port assembly 304 is separated from the interface 7 of the gas meter 6 under test. Finally, the clamping mechanism 5 is released and the gas meter 6 under test is removed from the operating table 4 after the test is completed, thus completing the entire test process.

[0048] Furthermore, once the gas meter to be tested 6 is placed on top of the operating table 4, the operator immediately activates the clamping mechanism 5. The push plate 501, as the component directly contacting the gas meter to be tested 6, is initially positioned away from the gas meter. The operator pushes the push plate 501 closer to the gas meter. As the push plate 501 approaches the gas meter, the rotating plate 502 rotates due to the movement of the push plate 501, causing the insertion block 503 to slide along the inner wall of the adjusting strip 5041. When the push plate 501 moves to the appropriate position, the operator rotates the rotating plate 502, inserting the insertion block 503 into the corresponding slot 5042 at the top of the adjusting strip 5041. This adjusts the distance between the push plate 501 and the rear plate 5061, allowing the clamping mechanism 5 to adapt to gas meters of different widths and sizes. During the sliding of the push plate 501, the guide rail 5052 slides along the track on the inner wall of the guide block 5051, limiting the movement direction of the push plate 501 and ensuring its smooth sliding. The fixing component 506 further enhances the fixing effect of the gas meter under test 6. After the push plate 501 completes the position adjustment, it forms a bidirectional stable clamp with the rear plate 5061, ensuring that the gas meter under test 6 remains stable during the air tightness test. After the test is completed, the operator rotates the rotating plate 502 to pull the insert block 503 out of the slot 5042 of the adjusting strip 5041, and then pushes the push plate 501 away from the gas meter under test in the opposite direction. Finally, the gas meter under test 6, which has been tested, is successfully removed, completing one complete working cycle of the clamping mechanism 5.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gas meter airtightness testing device, characterized in that, include: The base plate (1) is characterized in that: a support platform (2) is fixedly connected to the top of the base plate (1), a detection mechanism (3) is provided at the bottom of the support platform (2), the detection mechanism (3) is used for automatic detection, an operating table (4) is fixedly connected to the top of the base plate (1), a clamping mechanism (5) is provided at the top of the operating table (4), the clamping mechanism (5) is used for clamping the test piece, a gas meter (6) to be tested is slidably connected to the top of the operating table (4), and the top of the gas meter (6) to be tested has two interfaces (7) connected to it. The detection mechanism (3) includes an air pump (301), the bottom of which is fixedly connected to the top of the support platform (2). The bottom of the support platform (2) is fixedly connected to a telescopic rod (302), and the bottom end of the telescopic rod (302) is fixedly connected to a pressure plate (303). The bottom of the pressure plate (303) is provided with two port assemblies (304), and the top of the pressure plate (303) is provided with two pressurizing assemblies (305). The top of the operating table (4) is provided with a stabilizing assembly (306).

2. The gas meter airtightness testing device according to claim 1, characterized in that: The clamping mechanism (5) includes a push plate (501), the rear side of the outer wall of the push plate (501) is slidably connected to the front part of the outer wall of the gas meter (6) to be tested, the outer wall of the push plate (501) is rotatably connected to a rotating plate (502), the bottom end of the rotating plate (502) is fixedly connected to an insert block (503), the top of the operating table (4) is provided with an adjustment component (504), the top of the operating table (4) is provided with a guide component (505), and the top of the operating table (4) is provided with a fixing component (506).

3. The gas meter airtightness testing device according to claim 1, characterized in that: The port assembly (304) includes an outer tube (3041), the top of which is fixedly connected to the bottom of the pressure plate (303), a tapered inner tube (3042) is fixedly connected to the inner wall of the outer tube (3041), and a plurality of sealing rings (3043) are fixedly connected to the inner wall of the outer tube (3041).

4. The gas meter airtightness testing device according to claim 1, characterized in that: The pressurization assembly (305) includes a pressurization pump (3051), the bottom of which is fixedly connected to the top of the pressure plate (303), the top of which is connected to an air guide pipe (3052), and a test gauge (3053) is fixedly connected to the front side of the outer wall of the pressurization pump (3051).

5. The gas meter airtightness testing device according to claim 1, characterized in that: The stabilizing component (306) includes multiple slide bars (3061), the bottom ends of which are fixedly connected to the top of the operating table (4), and the top ends of which are fixedly connected to limit plates (3062).

6. The gas meter airtightness testing device according to claim 2, characterized in that: The adjusting component (504) includes an adjusting strip (5041), the bottom of which is fixedly connected to the top of the operating table (4), and the top of the adjusting strip (5041) is provided with multiple slots (5042).

7. The gas meter airtightness testing device according to claim 2, characterized in that: The guide assembly (505) includes two guide blocks (5051), the bottoms of which are fixedly connected to the top of the operating table (4), and the inner walls of which are slidably connected to guide rails (5052).

8. A gas meter airtightness testing device according to claim 2, characterized in that: The fixing component (506) includes a rear plate (5061), the bottom of which is slidably connected to the top of the operating table (4), and a mounting plate (5062) is fixedly connected to the rear side of the outer wall of the rear plate (5061). Multiple bolts (5063) are threadedly connected to the inner wall of the mounting plate (5062).

9. A gas meter airtightness testing device according to claim 3, characterized in that: The inner wall of the outer tube (3041) is slidably connected to the outer wall of the interface (7), and the outer wall of the tapered inner tube (3042) is slidably connected to the inner wall of the interface (7).

10. A gas meter airtightness testing device according to claim 7, characterized in that: The tops of the two guide rails (5052) are fixedly connected to the bottom of the push plate (501), and the outer wall of the insert (503) is slidably connected to the inner wall of the adjusting strip (5041).

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