Automatic detection method for pressure-resistant deformation of gas meter

Abstract

The invention discloses an automatic detection method for pressure-resistant deformation of a gas meter. The equipment comprises a frame part, an integrated detection device and a conveying device. The integrated detection device comprises a gas source assembly, a measurement assembly, a shell and an interface module. The gas source assembly is used for applying pressure higher than normal working pressure into the detected gas meter, and the measuring assembly is used for detecting deformation of the detected gas meter. The interface module comprises an automatic screwing assembly and the like and is used for automatically screwing the connection with the tested gas meter interface. The conveying device comprises a power-driven rotating disc and a gas meter clamping assembly. According to the automatic detection equipment, full automation of high-pressure resistance and deformation detection of the gas meter is realized, and the detection efficiency is remarkably improved. The innovative design of the automatic screwing assembly can accurately control the automatic screwing of the interface, and ensures the reliability of connection. In the streamline operation mode, the rotating disc and the adjustable clamping assembly achieve efficient conveying of the detected gas meter, and the detection intermittent time is greatly shortened.

Description

[0001] This application is a divisional application of the Chinese patent application filed on April 15, 2024, with application number 2024104461462 and invention name “Automatic detection equipment for pressure deformation of gas meter and detection method thereof”. Technical Field

[0002] The present invention relates to the technical field of production and manufacturing of gas metering instrument equipment, and in particular to a highly automated and intelligent flow-type testing device for testing the pressure resistance and deformation performance of household or industrial gas meters. Background Art

[0003] Gas meters measure flammable and explosive gases. If they leak due to quality issues, they can pose a serious safety hazard. Therefore, strict testing to ensure the safety performance of gas meters is crucial.

[0004] Currently, gas meter pressure resistance testing primarily relies on static gas testing. This involves applying 1.5 times the rated pressure to the inside of the meter, maintaining the pressure for 30 minutes, and then inspecting the deformation. However, this method significantly differs from the actual usage of gas meters. In reality, the pressure in gas pipelines and meters fluctuates constantly. These cyclical fluctuations in internal pressure can cause fatigue stress, which can reduce the strength of the gas meter and create a potential leak. Existing static testing procedures are ineffective in verifying the fatigue resistance of gas meters, making it difficult to truly assess their safety and reliability.

[0005] To address this issue, existing technologies have proposed several dynamic testing solutions. For example, authorization publication number CN217688309U discloses a gas meter pressure strength tester that simulates the fatigue stress caused by the constantly changing internal pressure of a gas meter, testing the meter's fatigue resistance through accelerated simulation. Another authorization publication number, CN220399154U, discloses a multifunctional gas meter testing device that integrates multiple testing functions, including bending moment, torque, and pressure resistance, with a simple and reliable structure.

[0006] While these technical solutions offer some innovation, they still face some shortcomings in practical application. First, the current gas meter pressure test process is largely manual, resulting in low efficiency. Each gas meter test takes approximately 40 minutes, and the gas pipes and interfaces with the meter under test must be manually tightened, a cumbersome process. This is because most existing equipment lacks true automation, requiring manual intervention at numerous stages of the testing process, such as installing and securing the meter under test, connecting the gas supply line, adjusting the gas pressure, and monitoring data. This places a high level of labor on the operator.

[0007] Furthermore, because gas meter testing requires an extremely tight seal, the gas pipe and the meter interface cannot be connected using simple connection methods such as quick connectors. Instead, they must be connected manually with threaded connections. Furthermore, to ensure the accuracy of the test mechanism, the gas source interface is typically fixed and cannot be adjusted. Therefore, when manually tightening the connection, it is necessary to repeatedly and alternately tighten the two interfaces to prevent overtightening one side from undertightening the other, causing the threads to become stuck or damaged. As can be seen, traditional manual tightening methods introduce numerous lengthy and tedious steps into the interface connection process. Summary of the Invention

[0008] In light of this, the present invention provides a flow-type automatic testing device for gas meter pressure deformation, featuring high integration, a high level of automation, strong testing accuracy, and high production throughput. This device integrates a gas source simulation system, a deformation measurement system, a data acquisition and analysis unit, and an automated interface module, enabling fully automated performance testing of gas meters under high-pressure conditions.

[0009] The technical solution of the embodiment of the present invention is implemented as follows: a gas meter pressure deformation automatic detection device includes a frame part, an integrated detection device and a transmission device.

[0010] The integrated detection device includes an air source component, a measuring component, a housing and an interface module, wherein the air source component and the measuring component are integrated in the housing, and the interface module is arranged on one side of the air source component; The gas source assembly is used to apply a pressure higher than the normal operating pressure to the gas meter under test; The measuring component is used to detect the deformation of the gas meter under test when pressure is applied by the gas source component; The interface module includes a fixed rail, a slide, an actuator mounting frame, a connector, a docking joint and an automatic tightening assembly. The slide can slide on the fixed rail. The actuator mounting frame is arranged under the slide, and two groups of actuator mounting frames are connected through the connector. The docking joint is arranged in the actuator mounting frame and is connected to the interface of the gas meter to be measured. The automatic tightening assembly is used to automatically tighten the connection between the docking joint and the interface of the gas meter to be measured.

[0011] This technical solution integrates a gas meter testing device with a gas source component, a measuring component, a housing, and a specially designed automated interface module. The beneficial effect is that it enables fully automated, unattended testing of gas meter deformation under high pressure, improving detection efficiency and reliability.

[0012] Preferably, the interface modules are arranged in a rectangular plane, which has the beneficial effect of maximizing space utilization and improving work efficiency per unit area.

[0013] Preferably, the rectangular plane arrangement of the interface modules is a square arrangement, which has the beneficial effect of further improving space utilization and work efficiency.

[0014] Preferably, the automatic tightening assembly comprises: a driving pulley assembly, a torque-adjusting cylinder, a transmission motor, a drive belt, and a driven pulley assembly; the driving pulley assembly comprises a pulley body and a translating slide, which slides on the connector to drive the pulley body to engage or disengage the drive belt; the piston rod of the torque-adjusting cylinder pushes the translating slide to adjust the wrap angle between the pulley body and the drive belt, thereby adjusting the output torque; the output shaft of the transmission motor is in driving connection with the wheel axle of the pulley body to provide driving torque; and the driven pulley assembly comprises two pulleys connected by the transmission belt, each having a threaded hole that mates with the interface of the gas meter being tested. This advantageously enables precise control of the automatic tightening process of the interface, preventing damage while ensuring optimal tightening quality.

[0015] Preferably, the bottom surface of the pulley is provided with an annular groove, and the bottom plate surface of the actuator mounting frame is provided with a portion that cooperates with the annular groove to achieve the positioning of the pulley. The beneficial effect is that the pulley is accurately positioned and the fastening quality is further improved.

[0016] Preferably, the conveying device includes a power-driven turntable and a gas meter clamping assembly provided on the turntable, and the measuring assembly is fixed on the turntable. The beneficial effect is that efficient flow operation is achieved and the detection interval time is shortened.

[0017] Preferably, the gas meter clamping assembly can move in three directions: X, Y, and Z. The beneficial effect is that the flexibility of adapting to gas meters of different sizes is improved.

[0018] Preferably, the integrated detection device is installed at the middle layer and the upper layer of the frame part, and the conveying device is located at the middle layer of the frame part. The beneficial effect is to achieve compact and coordinated system integration.

[0019] A method for automatically detecting pressure deformation of a gas meter, applied to the above-mentioned automatic detection device for pressure deformation of a gas meter, comprises the following steps: S1) Initial positioning and connection step: the gas meter under test is moved to a position aligned with the interface module by an external transmission mechanism to achieve preliminary connection; S2) a pulley engagement step, wherein the torque adjustment cylinder pushes the slide of the driving pulley assembly to move, causing the pulley body to slightly engage with the transmission belt, and the transmission motor starts to operate and drives the driven pulley assembly to start rotating; S3) a torque adjustment step in which the torque adjustment cylinder continues to adjust to increase the wrap angle between the drive pulley assembly and the transmission belt, thereby gradually increasing the torque transmitted to the interface of the gas meter being tested, and when slippage of the transmission belt is detected, further increase in torque is interrupted; S4) Tightening completion step: the torque adjustment cylinder further increases the thrust to further increase the wrap angle between the drive pulley assembly and the transmission belt, and applies the required final tightening torque to the interface of the gas meter under test through the transmission belt.

[0020] The specific implementation steps of the automatic tightening process have the beneficial effect of guiding the correct operation sequence and parameter adjustment, ensuring the tightening quality.

[0021] Preferably, in step S4, when applying the required final tightening torque, the drive belt slips to ensure that the two gas meter interfaces under test are tightened to a consistent degree. During the final tightening step, the drive belt slippage is utilized to ensure that the two interfaces achieve a consistent torque. This further improves the uniformity of interface processing.

[0022] A method for automatically detecting pressure deformation of a gas meter, applied to the aforementioned water-type automatic detection device for pressure deformation of a gas meter, comprises the following steps: A) The gas meter clamping assembly clamps the gas meter to be tested; B) the turntable rotates to move the gas meter under test to a working position aligned with the interface module; C) Perform the above steps for the automatic detection method.

[0023] This detection method clarifies the coordinated operation of the conveyor and detection devices in the entire automatic detection process, which has the beneficial effect of ensuring the efficient and smooth operation of the production line.

[0024] In summary, the present invention has the following beneficial effects: 1. The full automation of high-pressure resistance and deformation detection of gas meters has been achieved, which significantly improves detection efficiency, reduces manual intervention and reduces labor intensity.

[0025] 2. The integrated design highly integrates the gas source components, measurement components, housing and interface modules, reflecting the advantages of modularity and compactness, and improving the integration level of the system.

[0026] 3. The innovative automatic tightening component design can accurately control the automatic tightening process of the interface, ensuring the reliability and sealing of the connection, and avoiding the uncertainties caused by manual operation.

[0027] 4. In the flow-line operation mode, the power turntable and the X / Y / Z three-way adjustable gas meter clamping device achieve efficient circulation of the gas meters being tested, shorten the detection interval time, and significantly improve the production throughput rate.

[0028] 5. The overall layout is reasonable, with the detection device placed on the upper level and the conveying device on the middle level, which is conducive to ensuring the detection accuracy and is convenient for operators to maintain and repair.

[0029] 6. The measuring assembly is fixed on the turntable and can be quickly moved to the test position. It works efficiently with the gas meter clamping device, further optimizing the process.

[0030] 7. The rectangular plane square layout is adopted to maximize the work efficiency per unit area and achieve optimal space utilization.

[0031] 8. Through automated gas flow simulation and pressure control, the actual operating conditions can be accurately reproduced, and the performance of the gas meter under the worst conditions can be comprehensively evaluated.

[0032] 9. Precision displacement sensors can monitor minute deformations of the meter body in real time, ensuring the structural integrity of the gas meter under high pressure and ensuring safe use.

[0033] 10. The real-time data acquisition and processing unit ensures the efficiency and accuracy of test data analysis, providing an authoritative basis for product quality assessment.

[0034] In general, this automatic detection equipment has comprehensively improved the automation, intelligence and refinement level of gas meter production and manufacturing, realized closed-loop management of quality control, ensured the high reliability and safety of the product, and is of great significance to improving corporate production efficiency, reducing labor costs and enhancing brand image. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a perspective view of the overall structure of the automatic detection equipment for pressure deformation of gas meters; Figure 2 This is a perspective view of the overall structure of the gas meter pressure deformation automatic detection equipment from another angle; Figure 3 This is a perspective view of the overall structure of the gas meter pressure deformation automatic detection equipment from another angle; Figure 4 It is the overall structural perspective diagram of the interface module; Figure 5 This is a perspective view of the overall structure of the interface module from another angle, where some parts such as the connector are removed for easier viewing; Figure 6 This is a perspective view of the overall structure of the interface module from another angle, where part of the structure is cut away for easier viewing; Figure 7 It is a perspective view of the overall structure of the drive pulley assembly; Figure 8 It is a perspective view of the overall structure of the power-driven turntable and gas meter clamping assembly.

[0036] Markings in the figure: frame part-1, integrated detection device-2, transmission device-3, air source assembly-21, measurement assembly-22, displacement sensor-221, housing-23, interface module-211, fixed rail-201, slide-202, actuator mounting frame-203, connector-204, docking joint-205, automatic tightening assembly-206, slide-01, driving pulley assembly-02, wheel body-021, translation slide-022, torque adjustment cylinder-03, transmission motor-04, driven pulley assembly-06, pulley-061, transmission belt-062, annular groove-063, power-driven turntable-31, gas meter clamping assembly-32.

[0037] Specific technical solutions Example 1 Refer to the attached Figure 1-8 A flow-type automatic pressure deformation detection device for gas meters includes a frame portion 1 with a three-layer structure (upper, middle, and lower) that divides the entire device into different functional areas; an integrated detection device 2 for applying pressure to the gas meter, detecting meter deformation, and performing other data collection and processing operations such as pressure monitoring and sealing inspection; and a conveyor device 3 for conveying the gas meter to complete the automatic detection operation in conjunction with the integrated detection device 2. The integrated detection device 2 is installed in the middle and upper layers of the frame portion 1, and the conveyor device 3 is located in the middle layer of the frame portion 1.

[0038] The Integrated Test Set 2 is an advanced gas meter test system designed to comprehensively evaluate the performance and pressure resistance of gas meters. The system consists of at least three main components: 1. Gas Source Assembly 21: This core component simulates actual gas flow conditions within the gas meter and applies pressure up to 1.5 times the normal operating pressure. This is achieved through a precision-controlled pressure regulation system, ensuring the meter can be tested to its limits in a safe and controlled environment.

[0039] 2. Measurement Assembly 22: To monitor the physical deformation of the gas meter housing under high pressure, Measurement Assembly 22 includes displacement sensors 221, which monitor minute movements of the housing. These sensors accurately record any shape changes, providing critical data for analysis, ensuring that the gas meter maintains its structural integrity when subjected to high gas pressure.

[0040] 3. Data Acquisition and Processing Unit: This unit collects and analyzes data from the gas source assembly 21 and the measurement assembly 22 to assess the performance and safety of the gas meter under high-pressure conditions. This unit typically includes a high-speed processor and storage devices, processing data in real time and providing user-friendly output.

[0041] To improve the integration and operational efficiency of the entire system, the data acquisition and processing unit and the gas source component 21 that simulates gas flow are integrated into a designed housing 23. This design not only helps reduce external interference but also makes maintenance and upgrades more convenient.

[0042] In addition, the entire housing 23, along with the components inside, is mounted on the upper layer of the frame portion 1, which helps ensure the stability and long-term reliable use of the equipment. This layout also makes it easy for technicians to access and maintain the various components while maintaining the compactness and industrial aesthetics of the entire system.

[0043] In addition to its core functions of simulating gas flow and applying operating pressure, the gas source assembly 21 also includes an interface module 211 that automatically connects to the gas meter's two interfaces through threaded connections. This interface module 211 is designed to achieve a quick, accurate, and reliable connection to the gas meter's input and output ports.

[0044] Interface module 211 is a key component in integrated test device 2. It features automatic alignment and threaded connection capabilities, ensuring precise fit with the gas meter interface during testing. This module also offers excellent sealing performance, preventing leaks at the connection point during testing and ensuring accurate test results. Interface module 211 includes the following components: 1) Fixed rail 201: This component is firmly mounted on the lower bottom surface of the upper layer of the frame part 1, providing stable support and guiding the movement of the slide 202.

[0045] 2) Slides 202: These two slides can slide freely and lock on the fixed rails 201, providing flexibility and adjustability for the subsequent connection process.

[0046] 3) Actuator mounting frame 203: It is fixedly connected to each slide 202 through a fixed block or a cylinder body, and defines an internal space for installing the components that perform the connection. The slides 202 and actuator mounting frames 203 corresponding to each other in the vertical direction form a group, and the two groups correspond to the two interfaces of the gas meter being measured.

[0047] 4) Connector 204: Located on the sides of the two actuator mounting frames, this component ensures the two frames are aligned and connects them together. The design of connector 204 also ensures that the center distance between the actuator mounting frames and the centers of the two gas meter interfaces are equidistant.

[0048] 5) Butt joints 205: These joints are located inside each actuator mounting frame 203 and are used to connect directly to the interface of the gas meter. The direct contact portion of the butt joint is made of a flexible material with a certain strength, such as rubber. This material can adapt to slight position deviations and provide good sealing performance.

[0049] 6) Automatic tightening assembly 206: Its execution part is located below the two butt joints 205, while the power and torque adjustment parts are located on the connector 204. Automatic tightening assembly 206 is responsible for completing the precise tightening and loosening of the threads, ensuring the firmness and sealing of the connection.

[0050] The interface module 211 works in summary: Through the rotational motion of the automatic tightening assembly 206, it precisely connects to the threads of the gas meter port until the port and the docking connector 205 are tightly fitted. The automatic tightening assembly 206 adjusts the appropriate torque according to a preset program to ensure a secure connection.

[0051] The automatic tightening assembly 206 can use a mature mechanism or combination of mechanisms used in the prior art, such as an intelligent tightening robot, which can accurately control the rotational motion and tightening torque of the screw to ensure the reliability of the connection. They are usually equipped with advanced sensors and controllers, which can achieve efficient work in complex environments. However, intelligent tightening robots also have their limitations. Due to their complex structure, their manufacturing and maintenance costs are usually high. In addition, if used to connect the two interfaces of the gas meter, the intelligent tightening robot needs to design two independent drive systems, which involves the problem of synchronization.

[0052] To this end, the automatic screw fastening assembly 206 is optimized to ensure smoother and more efficient cooperation between it and the two actuator mounting frames 203. Figure 4-7 ,These diagrams show in detail the overall structure of the ,components and their connection relationships with the framework.

[0053] Figure 4 The overall structure is shown, clearly showing the position and connection method of the automatic screw fastening component 206 and the two actuator mounting frames 203. Figure 5 By removing some structures to show the internal working mechanism, the operation of the drive and torque regulation components is more intuitive. Figure 6 It presents the overall structure from another perspective, further revealing the interaction between components. Figure 7It focuses on the power and torque adjustment part, highlighting its core functions.

[0054] The specific structural details are as follows, including: 1) Connector 204: Designed as an elongated frame structure, its longitudinal midsection has protrusions extending outward on both the upper and lower sides. Slide grooves 01 are designed between this protrusion and the longitudinal midsection, providing a precise path for the movement and locking of other components.

[0055] 2) Drive Pulley Assembly 02: This assembly consists of a pulley 021 and a translating slide 022. The translating slide 022 can flexibly move or lock along a chute 01, ensuring smooth engagement and disengagement between the pulley 021 and the drive belt. This design not only improves efficiency but also enhances system stability.

[0056] 3) Torque Adjustment Cylinder 03: Its main body is securely mounted on connector 204 and is responsible for driving the movement or locking of pulley assembly 02. Precise control of the cylinder's movement allows for precise adjustment of tightening torque.

[0057] 4) Transmission Motor 04: Its main body is fixed to the translation slide 022, and its output shaft is connected to the axle of the wheel body 021. This design allows the motor's rotational power to be efficiently and stably transmitted to the pulley assembly, ensuring smooth tightening operations.

[0058] 5) Driven Pulley Assembly 06: This includes two pulleys 061, each of which is restricted or allowed to move a small distance in the axial direction while being able to rotate freely in the radial direction. These pulleys have a central threaded hole that mates with the gas meter interface thread, corresponding to the butt joint 205. The two pulleys are connected by a transmission belt 062, jointly achieving power transmission and tightening operations. To ensure the precise positioning of pulley 061, its bottom surface is provided with an annular groove 063, and the upper surface of the bottom plate of the actuator mounting frame 203 is provided with a portion that mates with annular groove 063, thereby fixing the position of the pulleys.

[0059] The power transmission process of the automatic screw fastening assembly 206 involves precise torque control and mechanical coordination to ensure accurate engagement of the gas meter interface with the corresponding components. The following is a description of the improved working process: S1 Initial positioning and connection: First, the gas meter is accurately transferred to a position where its interface is aligned with the automatic screw fastening component 206 through an external transmission mechanism (such as a robot arm, etc.) to achieve preliminary docking.

[0060] S2 Pulley Engagement: Next, the torque adjustment cylinder 03 is activated, pushing the slide 022 of the drive pulley assembly 02 along the groove 01 of the connector 204. This action causes the wheel body 021 to slightly engage with the drive belt, preparing for the subsequent rotation. The transmission motor 04 begins to operate. At this point, the two pulleys 061 of the driven pulley assembly 06 and the drive belt are in a critical state, switching between slippage and effective transmission. This ensures that during the initial threaded engagement stage, the torque transmitted to the gas meter interface is kept to a minimum to avoid damage to the threads.

[0061] S3 Torque Adjustment: As engagement progresses, torque adjustment cylinder 03 continues to adjust, gradually increasing the contact angle between the drive pulley assembly 02 and the drive belt, thereby gradually increasing the torque transmitted to the gas meter interface. The transmission system monitors belt slip and uses this information to adjust torque in real time. If excessive torque causes belt slip, the system immediately interrupts further torque increase to protect the gas meter interface from damage.

[0062] S4 Tightening Completed: Once the gas meter interface and threads are essentially tightened, the system further increases the thrust of torque adjustment cylinder 03, further increasing the wrap angle between drive pulley assembly 02 and the drive belt. This allows the transmission system to apply the required tightening torque to the gas meter interface via the drive belt. Because the drive belt tends to slip when overloaded, this design ensures consistent tightening between the two interfaces, preventing poor sealing or interface damage caused by uneven tightening.

[0063] In general, the automatic screw fastening assembly 206 achieves highly automated, accurate, and safe fastening of the gas meter interface through precise control and mechanical design, thereby improving production efficiency and product quality.

[0064] In order to improve detection efficiency, the present invention has made a series of optimizations in the structure of the interface module 211 and the design of the transmission device 3. Specifically, they include: 1. Interface module layout: The interface module 211 is arranged in a rectangular plane, preferably a square. This layout is shown in Figure 1 , which helps to achieve more compact space utilization and improve the working efficiency of equipment per unit area.

[0065] 2. Conveyor Design: Conveyor 3 primarily consists of a powered turntable 31 and a gas meter holder assembly 32 secured to it. The gas meter holder 32 is movable in the X, Y, and Z directions, increasing the device's flexibility and ability to accommodate gas meters of varying sizes.

[0066] 3. Measuring assembly fixed: The measuring assembly 22 is also fixed to the turntable 31. In this way, when the turntable 31 rotates, the measuring assembly 22 can be quickly moved to each gas meter in the interface module 211 to measure the deformation, thereby improving the overall detection speed.

[0067] 4. Optimized Workflow: During operation, the gas meter clamping assembly 32 first clamps the gas meter and then quickly moves it to the appropriate working position through the rotation of the turntable 31. This process ensures an efficient and smooth operation sequence, whether performing tightening operations or testing, shortening the changeover time between gas meter processes and improving the overall efficiency of the production line.

[0068] Through these optimization measures, the present invention significantly improves the processing capacity of the gas meter automatic screw tightening and testing system, achieving higher production throughput while maintaining operational accuracy and reliability. These improvements make the equipment particularly suitable for large-scale, high-efficiency gas meter production and testing environments.

[0069] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A method for automatically detecting pressure deformation of a gas meter, characterized in that: Applicable to an automatic pressure-resistant deformation detection device for a gas meter, the detection device comprising a frame portion (1), an integrated detection device (2) and a transmission device (3), the integrated detection device (2) comprising a gas source component (21), a measurement component (22) and an interface module (211), the interface module (211) being arranged on one side of the gas source component (21); The gas source component (21) is used to apply a pressure higher than the normal working pressure to the gas meter under test; The measuring component (22) is used to detect the deformation amount of the gas meter under test when pressure is applied by the gas source component (21); The interface module (211) comprises a fixed track (201), a slide seat (202) capable of sliding adjustment or locking in the fixed track (201), an actuator mounting frame (203) fixedly connected to the bottom of the slide seat (202) via a fixed block, a connector (204) for connecting two sets of the actuator mounting frames (203), a butt joint (205) and an automatic tightening assembly (206), wherein the butt joint (205) is arranged in the actuator mounting frame (203) and is connected to an interface of a gas meter to be measured during operation, and the automatic tightening assembly (206) is used to automatically tighten the connection between the butt joint (205) and the interface of the gas meter to be measured; The layout of the interface module (211) is a rectangular plane layout; The rectangular plane arrangement of the interface modules (211) is a square arrangement; The automatic tightening assembly (206) comprises: The connector (204) is designed to be a long frame structure, wherein both upper and lower sides of the middle section in the long direction extend outward to form a protruding portion, and a slide groove (01) is designed in the region from this section to the protruding portion; A driving pulley assembly (02) comprising a wheel body (021) and a translation slide seat (022), wherein the translation slide seat (022) can be flexibly moved or locked along a slide groove (01); The torque regulating cylinder (03) has a main body portion firmly mounted on the connector (204); The main body of the transmission motor (04) is fixed on the translation slide (022); A driven pulley assembly (06) comprising two pulleys (061), each of which is restricted or allowed to move a certain small distance in the axial direction and can rotate freely in the radial direction; The pulley has a screw hole at the center that matches the gas meter interface thread, corresponding to the butt joint (205), and the two pulleys are connected by providing a transmission belt (062); The detection method includes the following steps: S1) an initial positioning and connection step, wherein the gas meter to be tested is transferred to a position aligned with the interface module (211) by an external transmission mechanism to achieve preliminary docking; S2) a pulley engagement step, wherein the torque regulating cylinder (03) pushes the slide seat (022) of the driving pulley assembly (02) to move, so that the wheel body (021) is slightly engaged with the transmission belt, and the transmission motor (04) starts to operate and drives the driven pulley assembly (06) to start rotating; S3) a torque adjustment step, wherein the torque adjustment cylinder (03) continues to adjust to increase the wrap angle between the drive pulley assembly (02) and the transmission belt, thereby gradually increasing the torque transmitted to the interface of the gas meter being tested, and when slippage of the transmission belt is detected, the torque is interrupted from continuing to increase; S4) Tightening completion step: the torque adjustment cylinder (03) further increases the thrust, so that the wrap angle between the driving pulley assembly (02) and the transmission belt continues to increase, and the required final tightening torque is applied to the interface of the gas meter under test through the transmission belt.

2. The automatic detection method for pressure-resistant deformation of a gas meter according to claim 1, characterized in that: In the step S4, when the required final tightening torque is applied, the transmission belt may slip to ensure that the tightening degrees of the two tested gas meter interfaces are consistent.

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