Positioning and clamping device for facilitating strength detection of gas meter upper shell interface
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JUHONG METERING SOLUTION CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-21
Smart Images
Figure CN224535605U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas meter manufacturing technology, specifically to a positioning and clamping device that facilitates strength testing of the upper shell interface of a gas meter. Background Technology
[0002] The connection quality between the gas meter casing and the interface directly affects the performance and lifespan of the entire gas meter. After the gas meter casing is manufactured, in order to ensure the connection quality at the interface, according to national standards, the gas meter needs to undergo strength tests such as torque tests. To conduct strength tests at the interface, it is usually necessary to first use an installation and fixing structure and a clamping structure. The gas meter casing is fixed by the installation and fixing structure, and then the interface is clamped by the clamping structure. A corresponding load is applied to the clamping structure to transfer the load to the interface for strength testing.
[0003] For example, CN116990152A discloses a multi-functional testing device for gas meters, which includes a base for mounting and fixing the upper shell of the gas meter, a positioning frame, a positioning component, and a bending moment testing mechanism, a torque testing mechanism, and a pressure resistance testing mechanism for strength testing. These strength testing mechanisms all utilize the threads of the connecting component's nut and the interface to connect them threadedly, and then apply a corresponding load to the nut. However, when applying a torsional load using the nut, on the one hand, the nut is prone to continue tightening along the threads of the interface, potentially causing the two parts to seize up and become difficult to disassemble; on the other hand, a large applied torsional load may damage the threads of the interface itself, affecting the connection stability of the gas meter housing interface. Furthermore, the connection of this connecting component at the interface requires manual connection, which is cumbersome and not conducive to improving the efficiency of strength testing for batches of gas meters. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a positioning and clamping device for convenient strength testing of the interface of a gas meter upper casing. The positioning and installation structure can initially position and install the gas meter upper casing, and then the clamping structure can clamp the interface of the gas meter upper casing to achieve further positioning and clamping of the gas meter upper casing, and apply a corresponding load to the interface through the clamping structure.
[0005] To solve the above problems, the present invention adopts the following solution: A positioning and clamping device for facilitating strength testing of the interface of a gas meter casing includes a mounting frame, a positioning and mounting structure for initial installation and fixation of the gas meter casing, and a clamping structure for clamping the interface of the gas meter casing. The clamping structure is provided with two sets corresponding to the two interfaces of the gas meter casing, including clamping cylinders and clamping linkage components. The clamping linkage components are mounted on the mounting plate and include wedge-shaped push blocks connected to the clamping cylinders and two clamping members that abut against the two symmetrical inclined surfaces of the wedge-shaped push blocks. The clamping members are rotatably hinged relative to the mounting plate and have an arc-shaped clamping part near the interface side. A return spring is also provided between the two clamping members. The clamping structure is also provided with two clamping clamping components corresponding to the two clamping members.
[0006] The above scheme first uses a positioning and installation structure to achieve the initial installation and fixation of the gas meter's upper casing. Then, a clamping structure is used to clamp the interface of the gas meter's upper casing, and the clamping structure is used to apply a corresponding load to the interface, which facilitates the strength test at the interface.
[0007] Preferably, the clamping assembly engages with a torsion groove formed on the outer wall of the boss on the interface to increase the connection between the clamping structure and the interface, allowing the torsional load to be evenly distributed on the interface, avoiding stress concentration. It also prevents the load applied to the clamping structure from being transmitted only to the threaded portion of the interface, reducing damage to the threads. This assembly includes: The sliding clamping member is L-shaped and includes a sliding plate that is slidably connected to the outer wall of the arc-shaped clamping part and a clamping plate that is vertically connected to the lower part of the sliding plate. The sliding plate has an abutting inclined surface and the clamping plate has a protruding end. The protruding end can be separably engaged with the torsion groove. A guide plate is provided on the mounting plate frame and located above the arc-shaped clamping part. It has a guide slope on its outer side. The guide slope and the abutment slope can be separated and abutted together to push the sliding clamping part to move downward. The recovery component is used to enable the sliding clamp to automatically move upward to return to its initial state after disengaging from the guide plate.
[0008] The above structure enables the clamping assembly and the torsion groove of the boss to be separably engaged, increasing the stress-bearing parts of the interface, reducing damage to the interface threads, and achieving synchronous rotation with the clamping structure. Specifically, when the clamping member rotates toward the interface, it can drive the sliding clamping member to rotate toward the boss. When the sliding plate's abutting inclined surface abuts against the guide plate's guide inclined surface, as the sliding plate continues to rotate, the guide plate can push the sliding plate downward and gradually embed the protruding end into the torsion groove, thus achieving the engagement of the clamping assembly and the torsion groove.
[0009] Preferably, the contact portion between the protruding end and the torsion groove is located outside the contact portion between the arc-shaped clamping part and the interface, and when the interface is clamped, the contact pressure of the former two is greater than the contact pressure of the latter two.
[0010] Using the above structure, the contact pressure between the protruding end and the torsion groove is always greater than the contact pressure between the arc-shaped clamping part and the interface. Therefore, it can be ensured that the part of the interface that bears greater force is located at the boss, which can reduce the damage to the threaded part of the interface. Furthermore, by controlling the pushing stroke of the clamping cylinder, the contact between the arc-shaped clamping part and the interface is made into a low-pressure contact, which further reduces the damage to the threaded part of the interface. At the same time, it ensures that the force-bearing area of the interface is sufficient, the stress of the interface is evenly distributed, and the clamping is stable and reliable.
[0011] Preferably, the restoration component adopts the principle of magnetism, so that both the arc-shaped clamping part and the clamping plate are magnetic and can attract each other. Furthermore, the force exerted by the guide plate on the sliding clamping part when it abuts is greater than the magnetic attraction between the two. At the same time, the maximum distance between the arc-shaped clamping part and the clamping plate is within the magnetic attraction range of the two.
[0012] When the clamping component rotates outward to release the interface, it also drives the sliding clamping component to rotate outward, causing the sliding clamping component to gradually separate from the guide plate. After separation, the arc-shaped clamping part attracts the clamping plate to move upward through magnetic attraction, thus returning the clamping assembly to its initial state.
[0013] Preferably, the longitudinal sliding connection of the sliding plate is achieved through the waist-shaped hole provided thereon and the limiting shaft of the side wall of the arc-shaped clamping part.
[0014] Preferably, the clamping plate is arc-shaped and can fit into the outer peripheral wall of the interface boss, with protruding ends located at both ends of the arc-shaped clamping plate. This ensures that the clamping plate can make tight contact with the interface boss, guaranteeing stable load transmission.
[0015] Preferably, the arc-shaped clamping part and the arc-shaped inner wall corresponding to the interface are provided with anti-slip grooves.
[0016] Anti-slip grooves are provided to increase the friction between the arc-shaped clamping part and the interface, thereby improving the stability of load transmission.
[0017] Preferably, the inner wall of the arc-shaped clamping part is provided with a rubber pad, and the anti-slip groove is provided on the rubber pad.
[0018] The above settings are intended to further improve clamping stability and reduce damage to the interface threads caused by this clamping structure.
[0019] Preferably, the positioning and mounting structure includes a fixed cylinder mounted on a mounting frame, a sliding assembly connected to the fixed cylinder and slidably connected along the mounting frame, a fixed pressure plate connected to the lower end of the sliding assembly, and a support assembly mounted on the lower end of the mounting frame for supporting the upper casing of the gas meter. The support assembly supports the upper casing of the gas meter and has a base plate and a support platform located at the upper end of the base plate. The support platform is inserted into the interior of the upper casing of the gas meter, and its shape matches the internal shape of the gas meter.
[0020] With the above structure, the fixed cylinder drives the sliding component to move, and the sliding component then drives the fixed pressure plate to move. This allows the fixed pressure plate to be moved up first, so that the space between it and the support component is large enough to facilitate the installation of the gas meter upper shell onto the support component. Then, the fixed cylinder pushes the fixed pressure plate down until it presses against the upper end of the interface, thus achieving the initial installation and fixation of the gas meter upper shell.
[0021] Preferably, the lower end of the fixed pressure plate is also connected to a pressing fastener, and there are two pressing fasteners, which are respectively coaxially arranged with the two interfaces.
[0022] The fixed cylinder drives the fixing part to move down and press it onto the upper end of the interface, so as to achieve precise pressing and fixing of the interface and ensure reliable installation and fixing of the gas meter upper shell.
[0023] The beneficial effects of this utility model are as follows: This utility model achieves initial positioning and installation of the gas meter upper shell through a positioning and installation structure, and then uses a clamping structure to clamp the interface of the gas meter upper shell to achieve further positioning and clamping of the gas meter upper shell. Then, the clamping structure is used to apply a corresponding load to the interface, which facilitates subsequent strength testing at the interface.
[0024] This utility model increases the connection between the clamping structure and the interface by setting a tight clamping component, so that the applied load can be evenly distributed on the interface, avoiding torsional stress concentration. At the same time, it can also prevent the load applied to the clamping structure from being transmitted only to the threaded part of the interface, thus reducing damage to the threaded part of the interface. Furthermore, during the clamping process, the protruding end and the twisted groove are connected before the arc-shaped clamping part clamps the interface. This ensures that the contact pressure between the protruding end and the twisted groove is always greater than the contact pressure between the arc-shaped clamping part and the interface. Therefore, it can be ensured that the part of the interface that bears more force is located at the protrusion, which can reduce the damage to the threaded part of the interface. By controlling the pushing stroke of the clamping cylinder, the contact between the arc-shaped clamping part and the interface is made into a low-pressure contact, which further reduces the damage to the threaded part of the interface. At the same time, it ensures that the interface has a sufficient force-bearing area, the stress of the interface is evenly distributed, and the clamping is stable and reliable.
[0025] In this invention, the manual operation part is only to put the gas meter upper shell onto the support component, while its initial fixation can be automatically controlled by the fixing cylinder. The clamping of the interface part can be automatically clamped by the clamping cylinder. Moreover, the clamping and unclamping steps are more streamlined than threaded connections, making the overall operation convenient and improving the detection efficiency. At the same time, the automated setting ensures that the installation and clamping position of the gas meter upper shell is accurate, which can improve the detection accuracy. Attached Figure Description
[0026] Figure 1A schematic diagram of the structure of the gas meter upper shell installed in this utility model; Figure 2 A schematic diagram of the structure of the gas meter upper casing installed in this utility model. Figure 3 This is a schematic diagram of the clamping structure in this utility model; Figure 4 This is a schematic diagram of the clamping structure in this utility model; Figure 5 This is a partial structural diagram of the clamping structure and interface in this utility model when they are not fully clamped.
[0027] Reference numerals: Gas meter upper shell 01, interface 02, boss 03, torsion groove 031, mounting bracket 10, positioning mounting structure 20, clamping structure 30, clamping assembly 40, guide support column 11, fixed cylinder 21, sliding assembly 22, fixed pressure plate 23, support assembly 24, pressing fixing piece 25, connecting plate 221, connecting rod 222, base plate 241, clamping cylinder 31, clamping linkage assembly 32, mounting plate frame 33, wedge push block 321, clamping piece 322, return spring 323, upper mounting plate 331, lower mounting plate 332, arc-shaped clamping part 3221, anti-slip groove 3222, sliding clamping piece 41, guide plate 42, sliding plate 411, clamping plate 412, guide slope 421, abutting slope 4111, protruding end 4121, waist-shaped hole 51, limiting shaft 52. Detailed Implementation
[0028] Example: This embodiment provides a positioning and clamping device for facilitating strength testing of the interface of a gas meter upper shell. The positioning and installation structure 20 can be used to initially position and install the gas meter upper shell 01. Then, the clamping structure 30 clamps the interface 02 of the gas meter upper shell 01 to achieve positioning and clamping of the gas meter upper shell 01. Then, the clamping structure 30 applies a corresponding load to the interface 02 to facilitate strength testing at the interface.
[0029] Among them, you can refer to Figure 2 The gas meter upper shell 01 has two interfaces 02, which are usually connected to the main shell of the gas meter upper shell 01 by welding or riveting. The lower end of the interface 02 generally has a boss 03 to facilitate positioning and assembly with the main shell, thereby facilitating subsequent fast and accurate welding or riveting.
[0030] refer to Figure 1 , Figure 2 The positioning and clamping device includes: Mounting frame 10 serves as the base mounting frame 10 for this device; The positioning and installation structure 20 is installed on the mounting bracket 10 and is used for the initial positioning and installation of the gas meter upper casing 01. The clamping structure 30 is mounted on the mounting bracket 10 and is used to clamp and fix the interface 02, so that the interface 02 can be subjected to the corresponding load through this structure and related strength tests can be performed. Specifically, refer to Figure 1 The positioning and mounting structure 20 includes a fixed cylinder 21 mounted on the mounting frame 10, a sliding assembly 22 connected to the piston rod of the fixed cylinder 21, a fixed pressure plate 23 connected to the lower end of the sliding assembly 22, and a support assembly 24 mounted on the lower end of the mounting frame 10. The support assembly 24 is used to support the upper shell of the gas meter. It has a base plate 241 and a support platform (not shown in the figure) located on the upper end of the base plate 241. The support platform is inserted into the interior of the upper shell of the gas meter, and its shape matches the internal shape of the gas meter to ensure stable support for the upper shell 01 of the gas meter.
[0031] refer to Figure 1 The sliding assembly 22 includes a connecting plate 221 that is slidably connected to four guide support columns 11 of the mounting frame 10. The lower end of the connecting plate 221 is connected to the fixed pressure plate 23 through four rectangular connecting rods 222.
[0032] The installation and fixing process of the positioning and mounting structure 20 is as follows: The fixed cylinder 21 drives the sliding component 22 to move, and the sliding component 22 then drives the fixed pressure plate 23 to move. This allows the fixed pressure plate 23 to be moved upward first, so that the space between it and the supporting component 24 is large enough to facilitate the installation of the gas meter upper shell onto the supporting platform. Then, the fixed cylinder 21 pushes the fixed pressure plate 23 downward until it presses against the upper end of the interface 02, thus achieving the initial installation and fixation of the gas meter upper shell 01.
[0033] Further, refer to Figure 1 , Figure 2 The lower end of the fixed pressure plate 23 is also connected to a pressing and fixing component 25. There are two pressing and fixing components 25, which are coaxially arranged with the two interfaces respectively. The pressing and fixing component 25 is moved down by the fixed cylinder 21 to press against the upper end of the interface 02, so as to achieve precise pressing and fixing of the interface 02 and ensure reliable installation and fixing of the gas meter upper shell 01.
[0034] After the initial installation of the gas meter upper shell 01 is achieved using the above structure, the interface 02 of the gas meter upper shell 01 is clamped by the clamping structure 30, which facilitates the application of corresponding loads by means of the clamping structure 30.
[0035] refer to Figure 2 The clamping structure 30 has two sets of corresponding interfaces 02 on the upper shell 01 of the gas meter, as shown in the reference. Figure 3 , Figure 4It includes a clamping cylinder 31 and a clamping linkage assembly 32, wherein the clamping linkage assembly 32 serves as the clamping execution component and is mounted on a mounting plate frame 33. The mounting plate frame 33 has an upper mounting plate 331 and a lower mounting plate 332, and the clamping linkage assembly 32 is mounted between the upper mounting plate 331 and the lower mounting plate 332.
[0036] Specifically, refer to Figure 4 The clamping linkage assembly 32 includes a wedge-shaped push block 321 connected to the clamping cylinder 31 and two clamping members 322 that abut against the two symmetrical inclined surfaces of the wedge-shaped push block 321. The clamping members 322 are rotatably hinged relative to the mounting plate frame 33 and have an arc-shaped clamping part 3221 near the interface 02. The arc-shaped inner wall of the arc-shaped clamping part 3221 corresponding to the interface 02 is provided with an anti-slip groove 3222. A return spring 323 is also provided between the two clamping members 322 to return to the initial state and release the interface.
[0037] To further improve clamping stability and reduce damage to the threads of the interface 02 of the clamping structure 30, a rubber pad (not shown in the figure) can be added to the arc-shaped inner wall of the arc-shaped clamping part 3221, and an anti-slip groove 3222 is provided on the rubber pad.
[0038] To ensure sufficient clamping area and reliable clamping, the arc-shaped clamping part 3221 is typically clamped onto the threaded portion of the interface. However, when applying load using the clamping structure 30, it may damage the threads of the interface. Therefore, it is advisable to refer to... Figures 3-5 The clamping structure 30 is further provided with two clamping components 322, and the two clamping components 40 are symmetrically arranged.
[0039] refer to Figure 4 , Figure 5 The clamping assembly 40 engages with the torsion groove 031 on the outer wall of the boss 03 of the interface 02 to increase the connection between the clamping structure 30 and the interface 02, so that the applied load can be evenly distributed on the interface 02, avoiding stress concentration. It also prevents the load applied to the clamping structure 30 from being transmitted only to the threaded portion of the interface 02, reducing thread damage. It includes: The sliding clamping member 41 is L-shaped and includes a sliding plate 411 that is slidably connected to the outer wall of the arc-shaped clamping part 3221 and a clamping plate 412 that is vertically connected to the lower part of the sliding plate 411. The sliding plate 411 has an abutting inclined surface 4111 and the clamping plate 412 has a protruding end 4121. The protruding end 4121 can be separably fitted with the torsion groove 031. The guide plate 42 is located at the lower end of the upper mounting plate 331 and above the arc-shaped clamping part 3221. It has a guide slope 421 on its outer side. The guide slope 421 and the abutting slope 4111 can be separated and abutted, which is used to push the sliding clamping part 41 to move downward. The recovery component (not shown in the figure) is used to enable the sliding clamp 41 to automatically move upward to return to its initial state after it is disengaged from the guide plate 42.
[0040] Specifically: The restoration component uses a magnetic principle, so that both the arc-shaped clamping part 3221 and the clamping plate 412 are magnetic and can attract each other. Furthermore, the force exerted by the guide plate 42 on the sliding clamping member 41 when they abut against each other is greater than the magnetic attraction between the two. At the same time, the maximum distance between the arc-shaped clamping part 3221 and the clamping plate 412 is within the magnetic attraction range of the two.
[0041] Therefore, when the sliding clamp 41 disengages from the guide plate 42, the arc-shaped clamping part 3221 can attract the clamping plate 412 upward through magnetic attraction, thereby resetting the initial state.
[0042] refer to Figure 4 , Figure 5 The longitudinal sliding connection of the sliding plate 411 is achieved through the waist-shaped hole 51 provided thereon and the limiting shaft 52 of the side wall of the arc-shaped clamping part 3221.
[0043] Furthermore, the contact portion of the protruding end 4121 and the torsion groove 031 is located outside the contact portion of the arc-shaped clamping part 3221 and the interface, and when the interface is clamped, the contact pressure of the former two is greater than the contact pressure of the latter two.
[0044] This structure ensures that the contact pressure between the protruding end 4121 and the torsion groove 031 is always greater than the contact pressure between the arc-shaped clamping part 3221 and the interface 02. Therefore, it can be ensured that the part of the interface 02 that is subjected to greater force is located at the boss 03, which can reduce the damage to the threaded part of the interface. Furthermore, by controlling the pushing stroke of the clamping cylinder 31, the contact between the arc-shaped clamping part 3221 and the interface 02 is a low-pressure contact, which further reduces the damage to the threaded part of the interface. At the same time, it ensures that the force-bearing area of the interface is sufficient, the stress of the interface is evenly distributed, and the clamping is stable and reliable.
[0045] Furthermore, to ensure tight contact between the clamping plate 412 and the boss 03 of the interface 02, stable load transmission is guaranteed. (Reference) Figure 4 , Figure 5 The clamping plate 412 is arc-shaped and can fit with the outer peripheral wall of the boss 03 of the interface 02. The protruding end 4121 is provided at both ends of the arc-shaped clamping plate 412.
[0046] The clamping principle and process of the clamping structure 30 and the clamping assembly 40 to the interface are as follows: The clamping cylinder 31 pushes the wedge-shaped push block 321 to move, causing its upper inclined surface to push the two clamping parts 322 to rotate inward, thereby causing the arc-shaped clamping part 3221 to clamp the outer wall of the interface 02, while the return spring 323 is compressed. During the process of the clamping part 322 rotating toward the interface 02, the clamping part 322 drives the sliding clamping part 41 to rotate toward the boss. When it rotates to the point where the abutting inclined surface 4111 of the sliding plate 411 abuts against the guiding inclined surface 421 of the guide plate 42, as the sliding plate 411 continues to rotate, it can move downward along the guiding inclined surface 421 of the guide plate 42, and gradually make the clamping plate 412 at the lower part of the sliding plate 411 surround the outer peripheral wall of the boss and embed the protruding end 4121 into the torsion groove 031. To avoid the arc-shaped clamping part 3221 clamping the outer wall of the interface too tightly, which may damage the threads of the interface, the pushing stroke of the clamping cylinder 31 can be controlled to make the arc-shaped clamping part 3221 and the threaded part of the interface 02 have low pressure contact, and the contact pressure between the two is less than the contact pressure between the protruding end 4121 and the torsion groove 031. When the interface needs to be released, the clamping cylinder 31 is driven in reverse to pull back the wedge-shaped push block 321, releasing the force on the clamping member 322. Under the action of the return spring 323, the two clamping members 322 gradually open and return to their original state, thereby releasing the interface. During the outward rotation of the clamping member 322, it also drives the sliding clamping member 41 to rotate outward, so that the sliding clamping member 41 gradually separates from the guide plate 42. After separation, the arc-shaped clamping part 3221 attracts the clamping plate 412 through magnetic attraction, causing it to move upward. The clamping plate 412 moves upward through the waist-shaped hole 51 on the sliding plate 411, thus returning the clamping assembly 40 to its initial state.
Claims
1. A positioning and clamping device for facilitating strength testing of the interface of a gas meter upper casing, comprising a mounting bracket (10), a positioning and mounting structure (20) for initial installation and fixing of the gas meter upper casing (01), and a clamping structure (30) for clamping the interface (02) of the gas meter upper casing, characterized in that, The clamping structure (30) is provided with two sets of clamping cylinders (31) and clamping linkage components (32) corresponding to the two interfaces (02) of the gas meter upper shell (01). The clamping linkage components (32) are installed on the mounting plate frame (33) and include a wedge-shaped push block (321) connected to the clamping cylinder (31) and two clamping members (322) respectively abutting against the two symmetrical inclined surfaces of the wedge-shaped push block (321). The clamping members (322) are rotatably hinged relative to the mounting plate frame (33) and have an arc-shaped clamping part (3221) near the interface (02). A return spring (323) is also provided between the two clamping members (322). The clamping structure (30) is also provided with two pressing clamping components (40) corresponding to the two clamping members (322).
2. The positioning and clamping device for convenient strength testing of the gas meter upper shell interface according to claim 1, characterized in that, The clamping assembly (40) engages with a torsion groove (031) on the outer wall of the boss (03) of the interface (02), including: The sliding clamp (41) is L-shaped and includes a sliding plate (411) slidably connected to the outer wall of the arc-shaped clamping part (3221) and a clamping plate (412) vertically connected to the lower part of the sliding plate (411). The sliding plate (411) has an abutting inclined surface (4111), and the clamping plate (412) has a protruding end (4121). The protruding end (4121) can be separably fitted with the torsion groove (031). The guide plate (42) is provided on the mounting plate frame (33) and located above the arc-shaped clamping part (3221). It has a guide slope (421) on its outer side. The guide slope (421) and the abutting slope (4111) can be separated and abutted, which is used to push the sliding clamping part (41) to move downward. The recovery component is used to enable the sliding clamp (41) to automatically move upward to return to its initial state after it is disengaged from the guide plate (42).
3. The positioning and clamping device for convenient strength testing of the gas meter upper casing interface according to claim 2, characterized in that, The restoration component uses the principle of magnetism, so that the arc-shaped clamping part (3221) and the clamping plate (412) are both magnetic and can attract each other. The force exerted by the guide plate (42) on the sliding clamping part (41) is greater than the magnetic attraction between the two. At the same time, the maximum distance between the arc-shaped clamping part (3221) and the clamping plate (412) is within the magnetic attraction range of the two.
4. The positioning and clamping device for convenient strength testing of the gas meter upper casing interface according to claim 2, characterized in that, The longitudinal sliding connection of the sliding plate (411) is achieved through the waist-shaped hole (51) provided thereon and the limiting shaft (52) on the side wall of the arc-shaped clamping part (3221).
5. The positioning and clamping device for convenient strength testing of the gas meter upper casing interface according to claim 2, characterized in that, The clamping plate (412) is arc-shaped and can fit with the outer peripheral wall of the boss (03) of the interface (02). The protruding end (4121) is located at both ends of the arc-shaped clamping plate (412).
6. The positioning and clamping device for convenient strength testing of the interface of the upper casing of a gas meter according to any one of claims 2-5, characterized in that, The contact area between the protruding end (4121) and the torsion groove (031) is located outside the contact area between the arc-shaped clamping part (3221) and the interface (02), and when the interface (02) is clamped, the contact pressure of the former two is greater than that of the latter two.
7. The positioning and clamping device for convenient strength testing of the gas meter upper casing interface according to claim 1, characterized in that, The arc-shaped clamping part (3221) and the arc-shaped inner wall corresponding to the interface (02) are provided with anti-slip grooves (3222).
8. The positioning and clamping device for convenient strength testing of the gas meter upper casing interface according to claim 7, characterized in that, The arc-shaped inner wall of the arc-shaped clamping part (3221) is provided with a rubber pad, and the anti-slip groove (3222) is provided on the rubber pad.
9. The positioning and clamping device for convenient strength testing of the gas meter upper casing interface according to claim 1, characterized in that, The positioning and mounting structure (20) includes a fixed cylinder (21) mounted on the mounting frame (10), a sliding component (22) connected to the fixed cylinder (21) and slidably connected along the mounting frame (10), a fixed pressure plate (23) connected to the lower end of the sliding component (22), and a supporting component (24) mounted on the lower end of the mounting frame (10) for supporting the upper shell (01) of the gas meter.
10. The positioning and clamping device for convenient strength testing of the upper casing interface of a gas meter according to claim 9, characterized in that, The lower end of the fixed pressure plate (23) is also connected to a pressing fastener (25), which has two parts and is coaxially set with the two interfaces (02) respectively.