Gas meter housing interface connection strength composite testing device

Abstract

This invention discloses a composite testing device for the interface connection strength of a gas meter housing, relating to the field of gas meter manufacturing and testing technology. In existing technologies, after the gas meter housing is manufactured, it needs to be transferred to specific equipment for interface pull-out and torsion testing, both typically performed on separate equipment, resulting in low efficiency. The composite testing device provided by this invention is integrally mounted on the fixed pressure plate of a stamping and riveting equipment, comprising: a clamping structure including a clamping cylinder and a clamping linkage assembly, the clamping linkage assembly including a wedge-shaped push block and two clamping parts, the clamping parts having arc-shaped clamping portions for clamping and fixing the interface; a pull-out testing structure applying a straight load at the interface for pull-out strength testing; and a torsion testing structure applying a torsional load to the clamping structure for torsional strength testing. This invention enables direct strength testing after stamping and riveting, eliminating the step of disassembly and reinstallation, improving production testing efficiency, and reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of gas meter manufacturing and testing technology, and specifically to a composite testing device for the connection strength of gas meter housing interfaces. Background Technology

[0002] During the manufacturing process of gas meters, strict quality testing is required on the connection strength of the gas meter housing interface. Traditional testing methods typically include tensile strength testing and torsional strength testing. A significant problem is that the testing process is relatively independent of the production process. This separate testing mode not only affects production efficiency but also increases the cost of product handling and repositioning.

[0003] Several improved testing devices have emerged in the prior art. For example, Chinese patent CN116990152A discloses a multifunctional testing device for gas meters. This device includes a base, a positioning frame, a positioning component, a bending moment testing mechanism, a torque testing mechanism, and a pressure resistance testing mechanism. By integrating multiple testing functions on the same device, it solves the problem of traditional testing methods requiring different tooling and equipment to test different items. The device uses a positioning component to fix the gas meter connector to the device with a nut. A cylinder-driven pressure sensor system is used for bending moment detection, improving upon the inconvenience of traditional testing methods that require a bench vise to clamp the meter and manual use of a torque wrench, thus increasing the automation level of the testing. For torque detection, the device uses a gear and rack meshing method to achieve torque detection, transmitting the torque to the tested object through a mechanical transmission system, thus mechanizing the torque detection. Furthermore, the device also uses a connecting component to pressurize the gas meter to achieve pressure resistance testing, and is equipped with a displacement sensor to detect the deformation of the gas meter casing, enabling a quantitative assessment of the gas meter's pressure resistance performance.

[0004] Although existing technologies such as CN116990152A have made some progress in the field of gas meter testing, there are still problems such as the testing process being independent of the production process and low equipment utilization. Summary of the Invention

[0005] The purpose of this invention is to provide a composite testing device for the interface connection strength of a gas meter housing. The device is installed on the fixed pressure plate of a stamping and riveting equipment. After the gas meter housing is stamped and riveted, it can perform pull-out and torsion tests at the same time as unloading, eliminating the step of removing and reinstalling the gas meter housing for strength testing.

[0006] The device comprises the following three main structures:

[0007] I. Clamping Structure:

[0008] It includes a clamping drive device (clamping cylinder) and a clamping linkage assembly, mounted on a mounting plate. The clamping linkage assembly includes a wedge-shaped push block connected to the clamping cylinder and two clamping parts that abut against the two symmetrical inclined surfaces of the wedge-shaped push block. The clamping parts are characterized by a centrally hinged, rotatable section relative to the mounting plate, with an arc-shaped clamping portion. The arc-shaped clamping portion has anti-slip grooves on its inner arc-shaped wall corresponding to the interface. A reset mechanism includes a reset spring between the two clamping parts, and a rubber pad on the arc-shaped clamping portion corresponding to the interface. Function: Used to clamp and fix the interface of the gas meter housing, applying appropriate loads to the interface through the clamping linkage assembly for relevant strength testing.

[0009] II. Pull-out test structure:

[0010] It includes a push-drive device (push-drive cylinder), a push-press plate, and multiple L-shaped force-applying components; the force-applying component structure includes a side plate and a bottom pressure plate, with the side plate slidingly connected to the arc-shaped clamping sidewall of the clamping component; the connection method is to achieve a sliding connection through the waist-shaped hole provided on the side plate and the limiting shaft provided on the arc-shaped clamping sidewall; the bottom pressure plate features an arc shape at the end facing the interface, which can fit against the outer circumference of the boss; magnetic design: both the arc-shaped clamping part of the clamping component and the bottom pressure plate are magnetic and can attract each other, and the distance between the arc-shaped clamping part and the housing is within the magnetic attraction range of the two; function: after the interface is fixed by the clamping structure, the push-drive device pushes the push-press plate to drive the force-applying components to apply a straight load at the interface, and performs tensile strength testing on the interface of the gas meter housing.

[0011] III. Torsion Detection Structure:

[0012] It includes a torsion drive device (torsion cylinder) and a symmetrically arranged torsion linkage assembly; the torsion linkage assembly includes a connecting plate frame connected to the torsion cylinder, two push rods hinged to the connecting plate frame, and two push seats hinged to the two push rods respectively. The ends of the two push seats are respectively hinged to two torsion connecting parts, and the lower ends of the two push seats are slidably connected to the fixed pressure plate; stabilizing support: the mounting plate frame is provided with a stabilizing support hole, which is coaxial with the interface and is used to make a rotatable connection with the fixed pressure plate; torsion fit: the outer wall of the interface is provided with four torsion slots, and the two ends of the bottom pressure plate protrude. During its downward movement, the two protruding ends are engaged in the corresponding torsion slots; function: after the interface is fixed by the clamping structure, a torsion load is applied to the other side of the clamping structure, so that the clamping structure drives the interface to twist, and the torsion strength of the interface of the gas meter housing is tested.

[0013] Detection principle:

[0014] Pull-out strength test: After fixing the gas meter housing interface with the clamping structure, the pusher cylinder pushes the push plate down, and the pusher plate pushes all the force-applying pressure components down along its upper waist-shaped hole, pressing the force-applying pressure components to the upper end of the housing. Then, the pusher cylinder continuously applies the thrust to generate pull-out stress at the connection between the interface and the housing.

[0015] Torsional strength test: Start the torsion cylinder to extend its piston rod, which drives the push rod to rotate through the connecting plate frame. The push rod drives the push seat to move linearly along the slide rail. The push seat then pushes the clamping structure to rotate around the center line through the torsion connector, and the arc-shaped clamping part and the force-applying pressure part transfer the torsional load to the interface.

[0016] Compared with existing technologies, it has the following advantages:

[0017] 1. Improved testing efficiency: Strength testing can be performed directly after stamping and riveting, eliminating the step of removing and reinstalling the gas meter housing for strength testing, which significantly improves the production and testing efficiency of the gas meter housing.

[0018] 2. Composite testing function: It can simultaneously perform tensile strength testing and torsional strength testing on the same equipment, avoiding the previous problem of having to perform testing on different equipment separately.

[0019] 3. High detection accuracy: The stable clamping of the arc-shaped clamping part and the precise positioning of the force-applying pressure part ensure that the load is accurately transferred to the interface connection, thereby improving the detection accuracy.

[0020] 4. Stable and reliable operation: The magnetic attraction design and reset spring mechanism ensure stability and reliability during the detection process.

[0021] 5. Reduced production costs: Reduced equipment investment and labor costs, and increased automation.

[0022] 6. Standardized testing: By pre-setting the cylinder thrust and pushing stroke, standardized testing and judgment criteria were established, which improved the consistency and accuracy of testing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the clamping structure in this invention;

[0024] Figure 2 This is a schematic diagram of the structure in which the torsion detection structure and clamping structure cooperate with the gas meter housing in this invention;

[0025] Figure 3 This is a schematic diagram showing the relative position structure of the gas meter housing and the fixed pressure plate in this invention;

[0026] Figure 4This is a schematic diagram of the structure in which the torsion detection structure and the clamping structure cooperate in this invention;

[0027] Figure 5 This is a schematic diagram of the clamping structure in this invention;

[0028] Figure 6 for Figure 2 A magnified view of section I in the middle.

[0029] Reference numerals: Gas meter housing 01, Interface 02, Torsion groove 04, Clamping structure 10, Pull-out detection structure 20, Torsion detection structure 30, Fixed pressure plate 03, Clamping cylinder 11, Clamping linkage assembly 12, Mounting plate frame 13, Wedge-shaped push block 121, Clamping component 122, Return spring 123, Support stabilizing hole 131, Arc-shaped clamping part 1221, Anti-slip groove 1222, Pushing cylinder 21, Pushing plate 22, Force-applying pressure component 23, Side plate 231, Bottom pressure plate 232, Waist-shaped hole 241, Limiting shaft 242, Torsion cylinder 31, Torsion linkage assembly 32, Torsion connector 33, Connecting plate frame 321, Push rod 322, Push seat 323, Slide rail 324. Detailed Implementation

[0030] Example:

[0031] Previously, after the gas meter housing 01 was manufactured, it was necessary to transfer it to a specific strength testing device to test the strength of the connection between the interface 02 and the housing, including interface pull-out test and interface torsion test. Both tests were usually performed on separate devices, which was inefficient.

[0032] Therefore, this embodiment provides a composite testing device for the connection strength of a gas meter housing interface, which can perform pull-out and torsion testing simultaneously with unloading after stamping and riveting. (Reference) Figure 1 , Figure 2 The composite testing device is integrally mounted on the fixed pressure plate 03 of the stamping and riveting equipment. The fixed pressure plate 03 directly or indirectly presses against the interface 02 to form a fit with the stamping die of the stamping and riveting equipment, completing the stamping and riveting of the interface 02 to the gas meter housing. The composite testing device includes:

[0033] Clamping structure 10: Used to clamp and fix interface 02, so as to facilitate the application of corresponding loads to the gas meter housing 01 through this structure and to perform relevant strength tests;

[0034] Pull-out testing structure 20: cooperates with clamping structure 10 to apply a straight load at the interface and perform pull-out strength testing on the interface of gas meter housing 01;

[0035] Torsion detection structure 30: cooperates with clamping structure 10 to apply torsional load to the interface and perform torsional strength detection at the interface of gas meter housing 01.

[0036] The above structure enables the device to perform edge stamping connection of the interface. After the stamping connection is completed, the device can be used directly to perform strength testing at the interface of the gas meter housing 01, eliminating the step of removing and reinstalling the gas meter housing 01 for strength testing, thus improving the production and testing efficiency of the gas meter housing 01.

[0037] When performing tensile strength and torsional strength tests, this device applies a corresponding load to the interface using the clamping structure 10. The principle is to fix the interface 02 by clamping the clamping structure 10 and then apply a torsional load to the other side of the clamping structure 10 to achieve torsional strength testing. Taking advantage of the fact that the clamping structure 10 is extremely close to the connection point of the interface 02 when clamping, a corresponding linear load is applied at this time through a specific structural design to achieve tensile strength testing.

[0038] refer to Figure 2 The clamping structure 10 is provided with two sets of clamping structures corresponding to the two interfaces of the gas meter housing 01 (e.g., Figure 4 As shown), including clamping cylinder 11 and clamping linkage assembly 12 (such as... Figure 5 As shown in the figure, the clamping linkage assembly 12, serving as the clamping execution assembly, is mounted on the mounting plate 13. It includes a wedge-shaped push block 121 connected to the clamping cylinder 11 and two clamping members 122 that abut against the two symmetrical inclined surfaces of the wedge-shaped push block 121. The middle part of each clamping member 122 is rotatably hinged relative to the mounting plate 13 and has an arc-shaped clamping portion 1221. The arc-shaped clamping portion 1221 has anti-slip grooves 1222 on its arc-shaped inner wall corresponding to the interface. When the two paired arc-shaped clamping portions 1221 perform clamping actions, they are always symmetrical about the center line of the interface 02. A return spring 123 is also provided between the two clamping members 122 to return to the initial state and release the interface. To further improve clamping stability, a rubber pad can be added to the arc-shaped clamping portion 1221 corresponding to the interface, and the anti-slip grooves 1222 are provided on the rubber pad.

[0039] The clamping principle of the clamping structure 10 is as follows: the clamping cylinder 11 pushes the inclined push block to move, so that its upper inclined surface pushes the two clamping parts 122 to rotate inward, while compressing the return spring 123, so that the arc-shaped clamping part 1221 clamps the outer wall of the interface; when the interface needs to be released, the clamping cylinder 11 is driven in the opposite direction to pull the wedge-shaped push block 121 back, releasing the force on the clamping parts 122, so that the two clamping parts 122 gradually open and return to their original state under the action of the return spring 123, thereby releasing the interface.

[0040] Pull-out test structure 20

[0041] After the clamping structure 10 stabilizes the clamping interface, the pull-out strength is tested using the pull-out detection structure 20, the specific structure of which is as follows:

[0042] refer to Figure 2 The pull-out detection structure 20 includes a push cylinder 21, a push plate 22 connected to the piston rod of the push cylinder 21, and a plurality of L-shaped force-applying components 23 located between the push plate 22 and the gas meter housing 01. The plurality of force-applying components 23 are arranged in a one-to-one correspondence with a plurality of clamping components 122. The force-applying component 23 includes a side plate 231 and a bottom pressure plate 232. The side plate 231 is slidably connected to the side wall of the arc-shaped clamping part 1221 of the clamping component 122. This slidable connection is achieved through the waist-shaped hole 241 provided on the side plate 231 and the limiting shaft 242 provided on the side wall of the arc-shaped clamping part 1221.

[0043] The detection principle of this pull-out detection structure 20 is as follows: (Refer to...) Figures 1-3 After the gas meter housing 01 interface is fixed by the clamping structure 10, the pusher cylinder 21 pushes the pusher plate 22 down, and the pusher plate 22 pushes all the force-applying pressure members 23 down along its upper waist-shaped hole 241, pressing the force-applying pressure members 23 to the upper end of the housing. Then, the pusher cylinder 21 continuously applies the pushing force to generate pull-out stress at the connection between the interface and the housing, thereby realizing the pull-out strength detection at the interface of the gas meter housing 01.

[0044] Furthermore, to enable the pressure-applying component 23 to transmit the thrust of the pressing cylinder 21 more closely to the connection between the interface and the housing, the bottom pressure plate 232 is arc-shaped at one end facing the interface 02 and can fit against the outer circumference of the boss. This allows the load of the pressure-applying component 23 to be tightly fitted to the connection between the interface and the housing, improving the accuracy of the pull-out strength test.

[0045] Preferably, the arc-shaped clamping part 1221 of the clamping member 122 and the bottom pressure plate 232 are both magnetic and can attract each other. At the same time, the distance between the arc-shaped clamping part 1221 and the shell is within the magnetic attraction range of the two.

[0046] Therefore, when the push cylinder 21 is not activated, the force-applying pressure member 23 and the arc-shaped clamping part 1221 can be firmly attached and will not slide down due to their own weight, ensuring that the bottom pressure plate 232 is separated from the shell and avoiding affecting the clamping operation of the clamping structure 10. When a pull-out strength test is required, the push force of the push cylinder 21 can be used to separate the force-applying pressure member 23 from the arc-shaped clamping part 1221. When the pull-out strength test is completed, the piston rod of the push cylinder 21 is controlled to retract, and the bottom pressure plate 232 of the force-applying pressure member 23 can move upward along the waist-shaped hole 241 to return to the initial state by relying on the magnetic attraction.

[0047] After the tensile strength test is completed, the control cylinder 21 is retracted to unload the applied thrust. Then, the clamping structure 10 is maintained in the clamping state of the interface 02. The torsion detection structure 30 is used to drive the clamping structure 10 to twist, thereby indirectly applying a torsional load to the interface.

[0048] The torsion detection structure 30 includes a torsion cylinder 31 and a symmetrically arranged torsion linkage assembly 32. One end of the torsion linkage assembly 32 is connected to the piston rod of the torsion cylinder 31, and the other end is hinged to the mounting plate frame 13 of the two clamping structures 10 through two torsion connectors 33 respectively. The hinged part is away from the side of the arc-shaped clamping part 1221. The torsion assembly converts the linear thrust of the piston rod into a rotational thrust on the mounting plate frame 13, thereby pushing the clamping structure 10 to twist with the arc-shaped clamping part 1221 as the fixed point, so as to realize the torsion test of the gas meter housing 01 interface.

[0049] The torsional linkage assembly 32 includes a connecting plate frame 321 connected to the torsional cylinder 31, two push rods 322 hinged to the connecting plate frame 321, and two push seats 323 respectively hinged to the two push rods 322. The ends of the two push seats 323 are respectively hinged to two torsional connectors 33 (here, it needs to be explained that the position of the hinge holes, the shape and size of which have the movement space required to accommodate the swing of the torsional connectors 33), and the lower ends of the two push seats 323 are slidably connected to the slide rails 324 on the fixed pressure plate 03. It can be understood that in order to complete the swing of the torsional connectors 33, the relevant hinge positions of the torsional linkage assembly 32 can be adaptively adjusted to the required movement space.

[0050] Preferably, refer to Figure 4 The mounting plate 13 is provided with a support and stabilizing hole 131, which is coaxial with the interface 02 and is used to rotatably connect with the fixed pressure plate 03. Therefore, the clamping structure 10 can rotate around the rotation center line (e.g., under the pushing of the torsion detection structure 30) when pushed. Figure 4 The rotation (as shown) improves the stability of the clamping structure 10 under torsion, ensuring the accuracy and reliability of torsional strength detection.

[0051] Furthermore, to ensure stable clamping of the interface, enable near-lossless transmission of torsional loads, and ensure even distribution of the torsional load across the interface, this device also utilizes the force-applying pressure member 23 in the pull-out detection structure 20. This allows the interface 02 to have a nested groove 04 on its outer wall, improving clamping stability and increasing the torsional area of ​​the interface. (Reference) Figure 6 The outer wall is provided with four torsion slots 04, and the bottom pressure plate 232 is provided with protrusions at both ends. During its downward movement, the two protrusions are engaged in the corresponding torsion slots 04.

[0052] When using this structure for torsional strength testing, it is important to control the pushing stroke of the pushing cylinder 21. This stroke should be just enough to push the end of the bottom pressure plate 232 of the force-applying pressure member 23 into the torsion groove 04, but the bottom pressure plate 232 should not contact the housing 011 or should contact it but without pressure.

[0053] The torsion detection steps of the aforementioned torsion detection structure 30 are as follows: (Refer to...) Figures 1-6 The torsion cylinder 31 is activated, causing its piston rod to extend and drive the push rod 322 to rotate via the connecting plate frame 321. The push rod 322 drives the push seat 323 to move linearly along the slide rail 324. The push seat 323 then pushes the clamping structure 10 to rotate around the rotation center line via the torsion connector 33, generating a rotational tendency. (This rotation center line refers to the...) Figure 4 The center line drawn at the support stabilizing hole 131 is used to transfer the torsional load to the interface through the arc-shaped clamping part 1221 and the force-applying pressure member 23, thereby realizing the torsional detection of the interface.

[0054] Testing standards:

[0055] In this device, the pass / fail criteria for pull-out strength testing and torsional strength testing are as follows: the thrust of the push cylinder 21 and the thrust of the torsional cylinder 31 can be preset in advance according to the pull-out strength standard and the torsional strength standard at the interface connection of the gas meter housing 01, and the push stroke of the corresponding cylinder under the corresponding pass strength standard can be calculated. If the pull-out strength or torsional strength at the interface connection reaches the pass standard, the actual push stroke of the corresponding cylinder is less than or equal to the standard stroke. If the strength is not qualified, the actual push stroke of the corresponding cylinder is greater than the standard stroke. The push stroke measurement of the cylinder can be achieved by displacement sensor, visual inspection, etc.

Claims

1. A composite testing device for the connection strength of a gas meter housing interface, characterized in that: The entire assembly is installed on the fixed pressure plate (03) of the stamping and riveting equipment. It is used to perform pull-out and torsion tests simultaneously with unloading after stamping and riveting the gas meter housing (01), eliminating the need to remove and reinstall the gas meter housing (01) for strength testing. The assembly includes: The clamping structure (10) includes a clamping drive device and a clamping linkage assembly (12) for clamping and fixing the interface (02) of the gas meter housing (01), and applying a corresponding load to the interface (02) through the clamping linkage assembly (12) to perform relevant strength testing; The pull-out test structure (20) includes a push-drive device, a push plate (22) and multiple force-applying pressure components (23), which cooperate with the clamping structure (10) to fix the interface (02) through the clamping structure (10), and then use the push-drive device to push the push plate (22) to drive the force-applying pressure components (23) to apply a straight load at the interface (02) to perform tensile strength testing on the interface (02) of the gas meter housing (01); The torsion detection structure (30) includes a torsion drive device and a torsion linkage component (32), which cooperate with the clamping structure (10) to apply a torsion load to the other side of the clamping structure (10) after the interface (02) is fixed by the clamping structure (10), so that the clamping structure (10) drives the interface (02) to twist, and to detect the torsion strength at the interface (02) of the gas meter housing (01); The clamping drive device in the clamping structure (10) is a clamping cylinder (11). The clamping linkage assembly (12) is installed on the mounting plate frame (13) and includes a wedge-shaped push block (121) connected to the clamping cylinder (11) and two clamping members (122) that abut against the two symmetrical inclined surfaces of the wedge-shaped push block (121). The middle part of the clamping member (122) is rotatably hinged relative to the mounting plate frame (13) and has an arc-shaped clamping part (1221). The arc-shaped clamping part (1221) and the arc-shaped inner wall corresponding to the interface (02) are provided with anti-slip grooves (1222). The push-drive device in the pull-out detection structure (20) is a push-pressure cylinder (21). The push-pressure plate (22) is connected to the piston rod of the push-pressure cylinder (21). The force-applying pressure member (23) is located between the push-pressure plate (22) and the gas meter housing (01) and is L-shaped. The force-applying pressure member (23) includes a side plate (231) and a bottom pressure plate (232). The side plate (231) is slidably connected to the side wall of the arc-shaped clamping part (1221) of the clamping member (122).

2. The composite testing device for the connection strength of the gas meter housing interface according to claim 1, characterized in that: A return spring (123) is provided between the two clamping parts (122), and the arc-shaped clamping part (1221) is provided with a rubber pad corresponding to the interface (02). The anti-slip groove (1222) is provided on the rubber pad.

3. The composite testing device for the connection strength of the gas meter housing interface according to claim 1, characterized in that: The sliding connection between the side plate (231) and the arc-shaped clamping part (1221) is achieved through the waist-shaped hole (241) provided on the side plate (231) and the limiting shaft (242) provided on the side wall of the arc-shaped clamping part (1221).

4. The composite testing device for the connection strength of the gas meter housing interface according to claim 1, characterized in that: The bottom pressure plate (232) is arc-shaped at one end facing the interface (02) and can fit against the outer circumference of the boss.

5. The composite testing device for the connection strength of the gas meter housing interface according to claim 1, characterized in that: The arc-shaped clamping part (1221) of the clamping member (122) and the bottom pressure plate (232) are both magnetic and can attract each other. The distance between the arc-shaped clamping part (1221) and the shell (01) is within the magnetic attraction range of the two.

6. The composite testing device for the connection strength of the gas meter housing interface according to claim 1, characterized in that: The torsion drive device in the torsion detection structure (30) is a torsion cylinder (31), and the torsion linkage assembly (32) is symmetrically arranged.

7. The composite testing device for the connection strength of the gas meter housing interface according to claim 6, characterized in that: The torsional linkage assembly (32) includes a connecting plate frame (321) connected to the torsional cylinder (31), two push rods (322) hinged to the connecting plate frame (321), and two push seats (323) hinged to the two push rods (322) respectively. The ends of the two push seats (323) are respectively hinged to the two torsional connectors (33), and the lower ends of the two push seats (323) are slidably connected to the fixed pressure plate (03).

8. The composite testing device for the connection strength of the gas meter housing interface according to claim 1, characterized in that: The mounting plate (13) is provided with a support and stabilization hole (131), which is coaxial with the interface (02) and is used to make a rotatable connection with the fixed pressure plate (03); The outer wall of the interface (02) is provided with four torsion slots (04). The bottom pressure plate (232) is provided with protrusions at both ends. During its downward movement, the two protruding ends are fitted into the corresponding torsion slots (04).

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