Membrane electrode airtightness detection equipment

Abstract

The utility model relates to the related technical field of membrane electrodes, in particular to membrane electrode airtightness detection equipment which comprises a working cabinet, and a sliding device is arranged on the upper surface of a working table. According to the membrane electrode airtightness detection equipment, through the arrangement of the sliding device, the pressing module, the connecting block and the base are attached, the bolt is screwed in, a connecting rod at one end of the bolt is close to the connecting block, a surface limiting groove of the connecting rod is matched with a limiting block on the inner side of the stop pawl, and after the bolt is screwed, the stop pawl is clamped into the stop groove to form a locking mechanism; and the pressing module is convenient to mount and dismount. When air tightness detection is carried out on the membrane electrode assembly, the motor in the motor box is started, the motor drives the lead screw to rotate, the sliding block horizontally moves along the sliding groove under rotation of the lead screw and slides on the sliding rod at the same time, and the sliding rod stabilizes the moving track of the sliding block. The base above the sliding block moves along with the sliding block to drive the connecting block and the pressing module to move to a proper position, manual operation is not needed, time is saved, and the overall efficiency of air tightness detection of the membrane electrode assembly is improved.

Description

Technical Field

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

[0002] A membrane electrode is an electrochemical element with special structure and functions. A membrane electrode usually consists of parts such as a proton exchange membrane, a catalyst layer, and a gas diffusion layer. In a proton exchange membrane fuel cell, the membrane electrode is in a core position. The proton exchange membrane plays a key role in isolating fuel and oxidant and conducting protons in the membrane electrode. The catalyst layer contains a catalyst, which can promote the oxidation reaction of fuel (such as hydrogen) at the anode, releasing electrons and protons. At the same time, it also promotes the reduction reaction of oxidant (such as oxygen) at the cathode, combining with protons and electrons to generate water. The gas diffusion layer is responsible for evenly distributing gas and conducting the current generated by the reaction. In addition to the fuel cell field, membrane electrodes are also applied in some other electrochemical fields, such as electrolytic water hydrogen production, sensors, etc. It can achieve the selective transmission of specific ions or molecules and the efficient progress of electrochemical reactions. However, various manufacturing defects may occur during the production process of membrane electrodes, such as thin film pinholes, loose border encapsulation, etc. These defects will cause gas leakage, affecting the performance and service life of the membrane electrode. Through airtightness detection, membrane electrode products with airtightness problems can be found and removed in time, thereby improving the overall quality and reliability of the products. Therefore, there is a particular need for a membrane electrode airtightness detection device.

[0003] However, most of the airtightness detection devices used for existing membrane electrode assemblies are air pressure leak detection methods. Usually, the staff manually places the membrane electrode assembly to be tested. After placing it, the air cylinder is started to form a closed detection space. However, during this process, due to the limited space of the device, there are problems such as a small placement operation space for the membrane electrode assembly and the membrane electrode assembly is prone to being placed in an improper position. At the same time, it is also inconvenient to replace and disassemble the lower module, thereby increasing the difficulty and time cost of equipment maintenance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a membrane electrode airtightness detection device to solve the problems in the above background technique, that is, for an existing membrane electrode airtightness detection device, most of the airtightness detection devices used for existing membrane electrode assemblies are air pressure leak detection methods. Usually, the staff manually places the membrane electrode assembly to be tested. After placing it, the air cylinder is started to form a closed detection space. However, during this process, due to the limited space of the device, there are problems such as a small placement operation space for the membrane electrode assembly and the membrane electrode assembly is prone to being placed in an improper position. At the same time, it is also inconvenient to replace and disassemble the lower module, thereby increasing the difficulty and time cost of equipment maintenance.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A membrane electrode airtight detection device, including a working cabinet, a cabinet door is installed on one side surface of the working cabinet, support feet are fixedly connected to the bottom surface of the working cabinet, universal wheels are fixedly connected to the bottom surface of the working cabinet, a workbench is fixedly connected to the upper surface of the working cabinet, an electrical box is fixedly connected to the upper surface of the workbench, a control panel is fixedly connected to the outer surface of the electrical box, a sliding device is arranged on the upper surface of the workbench, and a pressing device is arranged on the upper surface of the workbench;

[0006] The sliding device includes a chute, a motor box, a motor, a lead screw, a slide bar, a slider, a base, a connecting block, a stop groove, a threaded hole, a bolt, a connecting rod, a limiting groove, a stop pawl, a limiting block, and a pressing module. A chute is opened on the upper surface of the workbench, a motor box is fixedly connected to the front side surface of the workbench, a motor is fixedly connected to the inner wall surface of the motor box, a lead screw is fixedly connected to one end surface of the motor, a slide bar is fixedly connected to the inner wall surface of the chute, a slider is slidably connected to the inner wall surface of the chute, a base is fixedly connected to the upper surface of the slider, a connecting block is slidably connected to the upper surface of the base, a stop groove is opened on the surface of the connecting block, a threaded hole is opened inside the connecting block, a bolt is threadedly connected to the inner wall surface of the threaded hole, a connecting rod is fixedly connected to one end of the bolt, a limiting groove is opened on the surface of the connecting rod, a stop pawl is slidably connected to the outer wall surface of the connecting rod, a limiting block is fixedly connected to the inner side surface of the stop pawl, and a pressing module is fixedly connected to one side surface of the connecting block.

[0007] Preferably, the support feet are symmetrically arranged at the four corners of the working cabinet with respect to the central axis of the working cabinet, and multiple groups of universal wheels are arranged at the bottom of the working cabinet.

[0008] Preferably, two groups of chutes are arranged on the surface of the workbench, and the lead screw and the slide bar are respectively arranged in the two groups of chutes.

[0009] Preferably, the slider slides in the chute through the lead screw, and the outer wall dimensions of the slider match the inner wall dimensions of the chute.

[0010] Preferably, the position of the stop groove corresponds to the position of the stop pawl, and the inner wall dimensions of the stop groove match the outer wall dimensions of the stop pawl, and the inner wall dimensions of the limiting groove match the outer wall dimensions of the limiting block.

[0011] Preferably, the pressing device includes a bracket, a hydraulic cylinder, a hydraulic rod, a buffer spring, a gasket, a telescopic tube, an auxiliary rod, and an upper pressing module. The upper surface of the workbench is fixedly connected with a bracket, the upper surface of the bracket is fixedly connected with a hydraulic cylinder, the hydraulic rod is slidably connected inside the hydraulic cylinder, the bottom surface of the hydraulic cylinder is fixedly connected with a buffer spring, the bottom surface of the hydraulic rod is fixedly connected with a gasket, the bottom surface of the bracket is fixedly connected with a telescopic tube, the auxiliary rod is slidably connected to the inner wall surface of the telescopic tube, and the bottom surface of the gasket is fixedly connected with an upper pressing module.

[0012] Preferably, the hydraulic rod and the gasket cooperate with the hydraulic cylinder to form a telescopic structure for the upper pressing module. The telescopic tube and the auxiliary rod are both arranged in two groups symmetrically with respect to the central axis of the bracket.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this membrane electrode airtightness detection device, through the setting of the sliding device, first, the lower pressing module, the connecting block are fitted to the base, and the bolt is screwed into the threaded hole. As the bolt is screwed in, the connecting rod at one end of the bolt gradually approaches the connecting block. The limiting groove on the surface of the connecting rod cooperates with the limiting block inside the stop pawl, enabling the stop pawl to slide within a certain range on the connecting rod. When the bolt is tightened in place, the stop pawl slides on the surface of the connecting rod until it snaps into the stop groove. After the stop pawl snaps into the stop groove, the cooperation between the stop pawl and the stop groove forms a firm locking mechanism, thereby installing the lower pressing module on the surface of the base and also facilitating the disassembly of the lower pressing module. When it is necessary to perform airtightness detection on the membrane electrode assembly, the motor in the motor box is started. The rotation of the motor drives the screw rod to rotate. On the one hand, the slider moves horizontally along the chute under the rotation of the screw rod through the threaded structure that cooperates with the screw rod. On the other hand, the slider slides on the sliding rod at the same time, and the sliding rod plays a role in stabilizing the movement trajectory of the slider, ensuring that the slider can move smoothly and accurately along the established direction. The base above the slider moves together with the slider, thereby driving the connecting block connected above the base and the lower pressing module connected to the connecting block to move to a suitable position. There is no need for manual operation, which greatly saves the operation time. Compared with the traditional manual placement method, this automated movement method is more stable and efficient, and can significantly improve the overall efficiency of the airtightness detection of the membrane electrode assembly, meeting the requirements of large-scale production detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic side view external structure diagram of the present utility model;

[0015] Figure 2 It is a schematic cross-sectional structure diagram of the sliding device of the present utility model;

[0016] Figure 3Schematic diagram of the mutual cooperation structure between the pressing module and the base of the present utility model;

[0017] Figure 4 Schematic sectional view of the pressing device of the present utility model;

[0018] Figure 5 For the present utility model Figure 3 Enlarged schematic diagram of part A in the present utility model.

[0019] In the figure: 1, working cabinet; 2, cabinet door; 3, support feet; 4, universal wheels; 5, workbench; 6, electrical box; 7, control panel; 8, sliding device; 801, chute; 802, motor box; 803, motor; 804, lead screw; 805, slide bar; 806, slider; 807, base; 808, connecting block; 809, stop groove; 810, threaded hole; 811, bolt; 812, connecting rod; 813, limit groove; 814, stop pawl; 815, limit block; 816, pressing module; 9, pressing device; 901, bracket; 902, hydraulic cylinder; 903, hydraulic rod; 904, buffer spring; 905, gasket; 906, telescopic tube; 907, auxiliary rod; 908, upper pressing module. Specific implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1-5 , the present utility model provides a technical solution: a membrane electrode airtight detection device, including a working cabinet 1, a cabinet door 2 is installed on one side surface of the working cabinet 1, support feet 3 are fixedly connected to the bottom surface of the working cabinet 1, universal wheels 4 are fixedly connected to the bottom surface of the working cabinet 1, a workbench 5 is fixedly connected to the upper surface of the working cabinet 1, an electrical box 6 is fixedly connected to the upper surface of the workbench 5, a control panel 7 is fixedly connected to the outer surface of the electrical box 6, a sliding device 8 is arranged on the upper surface of the workbench 5, and a pressing device 9 is arranged on the upper surface of the workbench 5;

[0022] The sliding device 8 includes a chute 801, a motor box 802, a motor 803, a lead screw 804, a slide bar 805, a slider 806, a base 807, a connecting block 808, a stop groove 809, a threaded hole 810, a bolt 811, a connecting rod 812, a limiting groove 813, a stop pawl 814, a limiting block 815, and a pressing module 816. A chute 801 is provided on the upper surface of the workbench 5. The front surface of the workbench 5 is fixedly connected with a motor box 802. The inner wall surface of the motor box 802 is fixedly connected with a motor 803. One end surface of the motor 803 is fixedly connected with a lead screw 804. The inner wall surface of the chute 801 is fixedly connected with a slide bar 805. The inner wall surface of the chute 801 is slidably connected with a slider 806. The upper surface of the slider 806 is fixedly connected with a base 807. The upper surface of the base 807 is slidably connected with a connecting block 808. A stop groove 809 is provided on the surface of the connecting block 808. A threaded hole 810 is provided inside the connecting block 808. The inner wall surface of the threaded hole 810 is threadedly connected with a bolt 811. One end of the bolt 811 is fixedly connected with a connecting rod 812. A limiting groove 813 is provided on the surface of the connecting rod 812. The outer wall surface of the connecting rod 812 is slidably connected with a stop pawl 814. The inner surface of the stop pawl 814 is fixedly connected with a limiting block 815. One side surface of the connecting block 808 is fixedly connected with a pressing module 816. Through the setting of the sliding device 8, first, the pressing module 816, the connecting block 808, and the base 807 are fitted together. The bolt 811 is screwed into the threaded hole 810. As the bolt 811 is screwed in, the connecting rod 812 at one end of the bolt 811 gradually approaches the connecting block 808. The limiting groove 813 on the surface of the connecting rod 812 and the limiting block 815 inside the stop pawl 814 cooperate with each other, enabling the stop pawl 814 to slide within a certain range on the connecting rod. When the bolt 805 is tightened in place, the stop pawl 814 slides on the surface of the connecting rod 812 until it snaps into the stop groove 809. After the stop pawl 814 snaps into the stop groove 809, the cooperation between the stop pawl 814 and the stop groove 809 forms a firm locking mechanism, thereby installing the pressing module 816 on the surface of the base 807 and also facilitating the disassembly of the pressing module 816. When it is necessary to perform an airtightness test on the membrane electrode assembly, the motor 803 in the motor box 802 is started. The motor 803 rotates to drive the lead screw 804 to rotate. On the one hand, the slider 806 moves horizontally along the chute 801 under the rotation of the lead screw 804 through a threaded structure that cooperates with the lead screw 804. On the other hand, the slider 806 slides on the slide bar 805 at the same time. The slide bar 805 plays a role in stabilizing the movement trajectory of the slider 806, ensuring that the slider 806 can move smoothly and accurately along the established direction. The base 807 above the slider 806 moves together with the slider 806, thereby driving the connecting block 808 connected above the base 807 and the pressing module 816 connected to the connecting block 808 to move to a suitable position, eliminating the need for manual operation and greatly saving the operation time.Compared with the traditional manual placement method, this automated moving method is more stable and efficient, which can significantly improve the overall efficiency of the airtightness detection of the membrane electrode assembly and meet the requirements of mass production detection.

[0023] Furthermore, the supporting feet 3 are symmetrically arranged at the four corners of the working cabinet 1 with respect to the central axis of the working cabinet 1. Multiple groups of universal wheels 4 are arranged at the bottom of the working cabinet 1. Through the settings of the supporting feet 3 and the universal wheels 4, the supporting feet 3 can effectively bear the weight of the upper workbench 5 and the detection equipment, ensuring that the entire equipment will not shake or tilt during the airtightness detection of the membrane electrode assembly, providing a solid foundation for the accuracy of the detection. The universal wheels 4 not only facilitate the movement and position adjustment of the equipment but also can lock the universal wheels through the braking device when the equipment needs to be fixed, further enhancing the stability of the equipment during the working state.

[0024] Furthermore, two groups of sliding grooves 801 are arranged on the surface of the workbench 5, and the lead screw 804 and the slide bar 805 are respectively arranged in the two groups of sliding grooves 801. Through the setting of the sliding grooves 801, the movement of the slider 806 is made more stable. The lead screw 804 is responsible for providing power to push the slider 806 to move, and the slide bar 805 plays a guiding and stabilizing role. The two cooperate with each other to effectively prevent the slider 806 from shifting or shaking during the movement, ensuring that the pressing module 816 can accurately move to the designated position for detection operations.

[0025] Furthermore, the slider 806 slides in the sliding groove 801 through the lead screw 804, and the outer wall size of the slider 806 matches the inner wall size of the sliding groove 801. Through the settings of the sliding groove 801 and the slider 806, the outer wall size of the slider 806 matches the inner wall size of the sliding groove 801. This tight fit makes the sliding of the slider 806 in the sliding groove 801 smoother, and at the same time reduces the errors and unstable factors brought by the gaps. Driven by the motor 803, the slider 806 can respond quickly and accurately, improving the detection efficiency and accuracy.

[0026] Furthermore, the position of the stop groove 809 corresponds to the position of the stop pawl 814, and the inner wall size of the stop groove 809 matches the outer wall size of the stop pawl 814. The inner wall size of the limit groove 813 matches the outer wall size of the limit block 815. Through the settings of the stop groove 809 and the stop pawl 814, when the stop pawl 814 is stuck into the stop groove 809, a tight fit can be formed, ensuring that the pressing module 816 will not loosen or displace during the working process. This firm locking mechanism provides a stable pressure for the airtightness detection and guarantees the accuracy of the detection results.

[0027] Further, the pressing device 9 includes a bracket 901, a hydraulic cylinder 902, a hydraulic rod 903, a buffer spring 904, a gasket 905, a telescopic tube 906, an auxiliary rod 907, and an upper pressing module 908. The upper surface of the workbench 5 is fixedly connected to the bracket 901. The upper surface of the bracket 901 is fixedly connected to the hydraulic cylinder 902. The hydraulic rod 903 is slidably connected inside the hydraulic cylinder 902. The bottom surface of the hydraulic cylinder 902 is fixedly connected to the buffer spring 904. The bottom surface of the hydraulic rod 903 is fixedly connected to the gasket 905. The bottom surface of the bracket 901 is fixedly connected to the telescopic tube 906. The auxiliary rod 907 is slidably connected to the inner wall surface of the telescopic tube 906. The bottom surface of the gasket 905 is fixedly connected to the upper pressing module 908. With the arrangement of the pressing device 9, when it is necessary to perform an airtightness test on the membrane electrode assembly, the hydraulic cylinder 902 above the bracket 901 is started, and the hydraulic system inside the hydraulic cylinder 902 starts to work, generating pressure to push the hydraulic rod 903 downward. During the downward movement of the hydraulic rod 903, the gasket 905 at its bottom drops accordingly, thereby driving the connected upper pressing module 908 to approach the membrane electrode assembly to be tested below. At the same time, the telescopic tube 906 at the bottom of the bracket 901 contracts as the hydraulic rod 903 descends. The auxiliary rod 907 slidably connected to the inner wall surface of the telescopic tube 906 plays a role in stabilizing and guiding, ensuring that the hydraulic rod 903 can move vertically downward and preventing it from shifting during the movement. When the hydraulic rod 903 continues to descend and the upper pressing module 908 contacts the membrane electrode assembly, pressure is continuously applied, and together with the lower pressing module 816 below, the membrane electrode assembly is clamped in the middle to form a sealed detection space. At this time, the pressure inside the hydraulic cylinder 902 remains stable to ensure that the pressure applied by the upper pressing module 908 to the membrane electrode assembly is moderate and stable. The buffer spring 904 fixedly connected to the bottom surface of the hydraulic cylinder 902 plays a buffering role in this process. When the hydraulic rod 903 descends relatively fast or is subjected to an accidental impact force, the buffer spring 904 can absorb part of the energy, preventing the upper pressing module 908 from causing excessive impact on the membrane electrode assembly, protecting the membrane electrode assembly from damage, and also helping to extend the service life of the pressing device 9.

[0028] Further, the hydraulic rod 903 and the gasket 905 cooperate with each other through the hydraulic cylinder 902 to form a telescopic structure for the upper pressing module 908. The telescopic tube 906 and the auxiliary rod 907 are both arranged in two groups symmetrically with respect to the central axis of the bracket 901. With the arrangement of the auxiliary rod 907, the stability of the upper pressing module 908 during the lifting and lowering process is further enhanced. The two groups of telescopic tubes 906 and auxiliary rods 907 can jointly share the weight and pressure of the upper pressing module 908, preventing it from tilting or shaking during the movement. The symmetrical arrangement also makes the force on the upper pressing module 908 more uniform, ensuring that it can closely fit with the membrane electrode assembly to form a good sealed detection space.

[0029] Working principle: First, place the membrane electrode assembly to be tested at a suitable position on the workbench 5. The support feet 3 at the bottom of the work cabinet 1 ensure that the entire device is stably placed on the ground, while the casters 4 facilitate moving the device when needed. The cabinet door 2 on one side of the work cabinet 1 can be used to store some testing-related tools or spare parts. When preparing for airtightness testing, start the device through the control panel 7, and the electrical box 6 provides the required power for each component of the device. Fit the pressing module 816 and the connecting block 808 to the base 807, and screw the bolt 811 into the threaded hole 810. As the bolt 811 is screwed in, the connecting rod 812 at one end of the bolt 811 gradually approaches the connecting block 808. The limiting groove 813 on the surface of the connecting rod 812 cooperates with the limiting block 815 inside the stop pawl 814, enabling the stop pawl 814 to slide within a certain range on the connecting rod. When the bolt 805 is tightened in place, the stop pawl 814 slides on the surface of the connecting rod 812 until it snaps into the stop groove 809. After the stop pawl 814 snaps into the stop groove 809, the cooperation between the stop pawl 814 and the stop groove 809 forms a firm locking mechanism, thus installing the pressing module 816 on the surface of the base 807 and also facilitating the disassembly of the pressing module 816. When it is necessary to conduct airtightness testing on the membrane electrode assembly, start the motor 803 in the motor box 802. The rotation of the motor 803 drives the screw rod 804 to rotate. On the one hand, the slider 806 moves horizontally along the chute 801 under the rotation of the screw rod 804 through the threaded structure that cooperates with the screw rod 804. On the other hand, the slider 806 slides on the slide bar 805 at the same time. The slide bar 805 plays a role in stabilizing the moving trajectory of the slider 806, ensuring that the slider 806 can move smoothly and accurately along the established direction. The base 807 above the slider 806 moves together with the slider 806, thereby driving the connecting block 808 connected above the base 807 and the pressing module 816 connected to the connecting block 808 to move to a suitable position, eliminating the need for manual operation, greatly saving operation time. Compared with the traditional manual placement method, this automated moving method is more stable and efficient, and can significantly improve the overall efficiency of airtightness testing of the membrane electrode assembly, meeting the requirements of large-scale production testing. When it is necessary to conduct airtightness testing on the membrane electrode assembly, start the hydraulic cylinder 902 above the bracket 901. The hydraulic system inside the hydraulic cylinder 902 starts to work, generating pressure to push the hydraulic rod 903 downward. During the downward movement of the hydraulic rod 903, the gasket 905 at its bottom descends accordingly, and then drives the upper pressing module 908 connected thereto to approach the membrane electrode assembly to be tested below. At the same time, the telescopic tube 906 at the bottom of the bracket 901 contracts as the hydraulic rod 903 descends. The auxiliary rod 907 slidably connected to the inner wall surface of the telescopic tube 906 plays a role in stabilizing and guiding, ensuring that the hydraulic rod 903 can move vertically downward and preventing it from deviating during the movement. When the hydraulic rod 903 continues to descend and the upper pressing module 908 contacts the membrane electrode assembly,Continue to apply pressure and cooperate with the lower pressing module 816 to clamp the membrane electrode assembly in the middle to form a sealed detection space. At this time, the pressure in the hydraulic cylinder 902 remains stable to ensure that the pressure applied by the upper pressing module 908 to the membrane electrode assembly is moderate and stable. The buffer spring 904 fixedly connected to the bottom surface of the hydraulic cylinder 902 plays a buffering role in this process. When the hydraulic rod 903 descends at a relatively fast speed or is subjected to an accidental impact force, the buffer spring 904 can absorb part of the energy, prevent the upper pressing module 908 from causing excessive impact on the membrane electrode assembly, protect the membrane electrode assembly from damage, and at the same time help to extend the service life of the pressing device 9. The model of the motor 803 is Y315S-2, and the model of the hydraulic cylinder 902 is CDM2B25. In this way, the use process of a membrane electrode airtight detection device is completed.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A membrane electrode gas tightness detection device, comprising a working cabinet (1), characterized in that: A cabinet door (2) is installed on one side surface of the work cabinet (1); a supporting foot (3) is fixedly connected to the bottom surface of the work cabinet (1); a universal wheel (4) is fixedly connected to the bottom surface of the work cabinet (1); a workbench (5) is fixedly connected to the upper surface of the work cabinet (1); an electric box (6) is fixedly connected to the upper surface of the workbench (5); a control panel (7) is fixedly connected to the outer surface of the electric box (6); a sliding device (8) is arranged on the upper surface of the workbench (5); and a pushing device (9) is arranged on the upper surface of the workbench (5); The sliding device (8) comprises a slide groove (801), a motor box (802), a motor (803), a screw rod (804), a slide rod (805), a slider (806), a base (807), a connecting block (808), a stop groove (809), a threaded hole (810), a bolt (811), a connecting rod (812), a limit groove (813), a stop pawl (814), a limit block (815) and a pressing module (816). The upper surface of the workbench (5) is provided with a slide groove (801), the front side surface of the workbench (5) is fixedly connected to the motor box (802), the inner wall surface of the motor box (802) is fixedly connected to the motor (803), one end surface of the motor (803) is fixedly connected to the screw rod (804), the inner wall surface of the slide groove (801) is fixedly connected to the slide rod (805), and the slide groove (801) The inner wall surface of the sliding block (806) is slidably connected to the sliding block (806), the upper surface of the sliding block (806) is fixedly connected to the base (807), the upper surface of the base (807) is slidably connected to the connecting block (808), the surface of the connecting block (808) is provided with a retaining groove (809), the interior of the connecting block (808) is provided with a threaded hole (810), the inner wall surface of the threaded hole (810) is threadedly connected to a bolt (811), one end of the bolt (811) is fixedly connected to a connecting rod (812), the surface of the connecting rod (812) is provided with a limiting groove (813), the outer wall surface of the connecting rod (812) is slidably connected to a retaining pawl (814), the inner side surface of the retaining pawl (814) is fixedly connected to the limiting block (815), and the side surface of the connecting block (808) is fixedly connected to a pressing module (816).

2. A membrane electrode gas tightness detection device according to claim 1, characterized in that: The support legs (3) are symmetrically arranged at the four corners of the work cabinet (1) with respect to the central axis of the work cabinet (1), and a plurality of sets of universal wheels (4) are arranged at the bottom of the work cabinet (1).

3. The membrane electrode gas tightness detection device according to claim 1, characterized in that: Two groups of the slide grooves (801) are arranged on the surface of the workbench (5), and the screw rod (804) and the slide rod (805) are respectively arranged in the two groups of slide grooves (801).

4. The membrane electrode gas tightness detection device according to claim 1, characterized in that: The slider (806) slides in the slide groove (801) via the screw rod (804), and the outer wall size of the slider (806) matches the inner wall size of the slide groove (801).

5. The membrane electrode gas tightness detection device according to claim 1, characterized in that: The position of the stop groove (809) corresponds to the position of the stop pawl (814), the inner wall size of the stop groove (809) matches the outer wall size of the stop pawl (814), and the inner wall size of the limit groove (813) matches the outer wall size of the limit block (815).

6. The membrane electrode gas tightness detection device according to claim 1, characterized in that: The pushing device (9) comprises a bracket (901), a hydraulic cylinder (902), a hydraulic rod (903), a buffer spring (904), a gasket (905), a telescopic tube (906), an auxiliary rod (907) and an upper pressing module (908); the upper surface of the workbench (5) is fixedly connected to the bracket (901); the upper surface of the bracket (901) is fixedly connected to the hydraulic cylinder (902); the hydraulic rod (903) is slidably connected inside the hydraulic cylinder (902); the bottom surface of the hydraulic cylinder (902) is fixedly connected to the buffer spring (904); the bottom surface of the hydraulic rod (903) is fixedly connected to the gasket (905); the bottom surface of the bracket (901) is fixedly connected to the telescopic tube (906); the inner wall surface of the telescopic tube (906) is slidably connected to the auxiliary rod (907); and the bottom surface of the gasket (905) is fixedly connected to the upper pressing module (908).

7. The membrane electrode gas tightness detection device according to claim 6, characterized in that: The hydraulic rod (903) cooperates with the gasket (905) to form a telescopic structure for the upper pressing module (908), and two groups of telescopic tubes (906) and auxiliary rods (907) are symmetrically arranged around the central axis of the bracket (901).

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