Pressure plate structure and membrane electrode air tightness testing equipment

Abstract

The utility model provides a pressure plate structure and a membrane electrode airtightness detection device, the pressure plate structure includes: an upper pressure plate; a lower pressure plate, the upper pressure plate and the lower pressure plate move relative to each other, the lower pressure plate is used to carry the membrane electrode, the upper pressure plate and the lower pressure plate are used to clamp the membrane electrode to complete the airtightness detection; a negative pressure part, the negative pressure part is arranged on the lower pressure plate, and the negative pressure part is used to adsorb the membrane electrode. With this solution, the upper pressure plate and the lower pressure plate can move relative to each other, the lower pressure plate carries the membrane electrode, the upper pressure plate and the lower pressure plate clamp the membrane electrode to complete the airtightness detection, after the airtightness detection is completed, the upper pressure plate leaves the lower pressure plate, and the negative pressure part adsorbs the membrane electrode to prevent the membrane electrode from sticking to the upper pressure plate and moving with the upper pressure plate. Through this solution, the purpose of preventing the membrane electrode from being carried away by the adhesion of the upper pressure plate and not damaging the membrane electrode is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a pressure plate structure and membrane electrode airtightness detection equipment. Background Art

[0002] A fuel cell is stacked with multiple unit cells, each of which includes an anode plate, a membrane electrode, and a cathode plate. After the membrane electrode is produced, it is necessary to perform a performance test on the membrane electrode, and an airtight test is one of the tests. When performing an airtight test on the membrane electrode, the membrane electrode is clamped by an upper pressing plate and a lower pressing plate, and the membrane electrode is tested for airtightness in the clamp. After the airtight test on the membrane electrode, when the upper pressing plate and the lower pressing plate are separated, the sealing strip of the upper pressing plate will adhere to the frame of the membrane electrode, causing the membrane electrode to move with the movement of the upper pressing plate, which may cause the membrane electrode to fall into the interior of the membrane electrode airtightness detection device, affecting the normal use of the membrane electrode airtightness detection device. In some prior arts, a plunger is used to bounce the membrane electrode off the upper pressing plate. This method will cause the plunger to leave an indentation on the membrane electrode during the process of the upper pressing plate and the lower pressing plate pressurizing the membrane electrode, affecting the installation and use of the membrane electrode. Therefore, there is a need for a membrane electrode airtightness detection device that can prevent the membrane electrode from being adhered and carried away by the upper pressing plate and does not damage the membrane electrode. Utility Model Content

[0003] The utility model provides a pressing plate structure and membrane electrode airtightness detection equipment, so as to achieve the purpose of preventing the membrane electrode from being adhered and carried away by the upper pressing plate and not damaging the membrane electrode.

[0004] In order to achieve the above object, according to one aspect of the utility model, a pressing plate structure is provided, comprising:

[0005] Upper pressing plate;

[0006] The lower pressing plate, the upper pressing plate and the lower pressing plate move relative to each other, the lower pressing plate is used to carry the membrane electrode, and the upper pressing plate and the lower pressing plate are used to clamp the membrane electrode to complete the airtightness test;

[0007] The negative pressure part is arranged on the lower pressure plate and is used for adsorbing the membrane electrode.

[0008] Furthermore, the negative pressure part includes a plurality of negative pressure suction cups, which are arranged on a side of the lower pressing plate close to the upper pressing plate, and are used to adsorb the membrane electrode.

[0009] Furthermore, the negative pressure part also includes a pressure gauge, and the pressure gauge is used to detect the pressure in the negative pressure suction cup.

[0010] Furthermore, the negative pressure part also includes a negative pressure generator, which is connected to a plurality of negative pressure suction cups, and the negative pressure generator is used to make the negative pressure suction cups generate negative pressure to adsorb the membrane electrode.

[0011] Furthermore, the negative pressure part includes an air source and a solenoid valve. The air source is connected to the negative pressure generator. The solenoid valve is arranged between the air source and the negative pressure generator. The air source is used to provide gas to the negative pressure generator. The solenoid valve is used to control the on-off between the air source and the negative pressure generator.

[0012] Furthermore, the negative pressure suction cup includes a fixed section and an adsorption section which are connected to each other. One end of the fixed section away from the adsorption section is fixedly connected to the lower pressure plate. The adsorption section is made of soft silicone and is connected to the membrane electrode.

[0013] Furthermore, the pressure plate structure also includes a limit block, which is arranged on one side of the lower pressure plate close to the upper pressure plate. The upper pressure plate has a limit groove, the membrane electrode has a positioning hole, and the limit block passes through the positioning hole of the membrane electrode and is connected to the limit groove.

[0014] Furthermore, the pressure plate structure also includes a sealing strip. The upper pressure plate has a sealing groove. The sealing strip is fixed in the sealing groove. The sealing strip presses the edge of the membrane electrode to press the membrane electrode against the lower pressure plate. A sealed cavity is formed between the upper pressure plate, the sealing strip and the membrane electrode.

[0015] Furthermore, the upper pressing plate has an air inlet and a first exhaust hole, and the lower pressing plate has a second exhaust hole, and the air inlet is used to inflate the sealed cavity.

[0016] According to another aspect of the utility model, a membrane electrode airtightness detection device is provided, including a main body, a slide rail, a clamping piece and the above-mentioned pressure plate structure, one end of the clamping piece is movably connected to the main body, and the other end of the clamping piece is connected to the upper pressure plate, the main body has an operating table, the slide rail is arranged on the operating table in a horizontal direction, the clamping piece is arranged above the operating table, the lower pressure plate is slidably connected to the slide rail, and the clamping piece is used to drive the upper pressure plate and the lower pressure plate to fit together to clamp the membrane electrode.

[0017] By applying the technical solution of the utility model, a pressure plate structure is provided, including: an upper pressure plate; a lower pressure plate, the upper pressure plate and the lower pressure plate move relative to each other, the lower pressure plate is used to carry the membrane electrode, the upper pressure plate and the lower pressure plate are used to clamp the membrane electrode to complete the airtightness test; a negative pressure part, the negative pressure part is arranged on the lower pressure plate, and the negative pressure part is used to adsorb the membrane electrode. With this solution, the upper pressure plate and the lower pressure plate can move relative to each other, the lower pressure plate carries the membrane electrode, the upper pressure plate and the lower pressure plate clamp the membrane electrode to complete the airtightness test, after the airtightness test is completed, the upper pressure plate leaves the lower pressure plate, and the negative pressure part adsorbs the membrane electrode to prevent the membrane electrode from sticking to the upper pressure plate and moving with the upper pressure plate. Through this solution, the purpose of preventing the membrane electrode from being carried away by the adhesion of the upper pressure plate and not damaging the membrane electrode is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a pressure plate structure provided by an embodiment of the utility model is shown;

[0020] Figure 2 Shows Figure 1 A schematic diagram of the structure of the lower pressing plate of the pressing plate structure;

[0021] Figure 3 Shows Figure 1 A schematic structural diagram of an upper pressing plate of a pressing plate structure in FIG.

[0022] Figure 4 Shows Figure 1 A schematic diagram of the structure of the pressure plate structure at another angle.

[0023] The above drawings include the following reference numerals:

[0024] 10. Membrane electrode;

[0025] 20. Upper pressing plate;

[0026] 21. Limiting groove;

[0027] 22. Air intake hole;

[0028] 23. First exhaust hole;

[0029] 24. Sealing groove;

[0030] 30. Lower pressure plate;

[0031] 31. Second exhaust hole;

[0032] 40. Negative pressure part;

[0033] 41. Negative pressure suction cup;

[0034] 50. Limit block;

[0035] 60. Sealing strip. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] like Figures 1 to 4As shown, according to one aspect of the utility model, an embodiment of the utility model provides a pressing plate structure, comprising:

[0038] Upper pressing plate 20;

[0039] The lower pressing plate 30, the upper pressing plate 20 and the lower pressing plate 30 move relative to each other, the lower pressing plate 30 is used to carry the membrane electrode 10, and the upper pressing plate 20 and the lower pressing plate 30 are used to clamp the membrane electrode 10 to complete the airtightness detection;

[0040] The negative pressure part 40 is disposed on the lower pressing plate 30 , and is used for adsorbing the membrane electrode 10 .

[0041] With this solution, the upper pressing plate 20 and the lower pressing plate 30 can move relative to each other, the lower pressing plate 30 carries the membrane electrode 10, and the upper pressing plate 20 and the lower pressing plate 30 clamp the membrane electrode 10 to complete the airtightness test. After the airtightness test is completed, the upper pressing plate 20 leaves the lower pressing plate 30, and the negative pressure part 40 adsorbs the membrane electrode 10 to prevent the membrane electrode 10 from sticking to the upper pressing plate and moving with the upper pressing plate 20. With this solution, the purpose of preventing the membrane electrode 10 from being stuck and carried away by the upper pressing plate 20 and not damaging the membrane electrode 10 is achieved.

[0042] like Figure 1 As shown, the negative pressure part 40 includes a plurality of negative pressure suction cups 41 . The negative pressure suction cups 41 are disposed on a side of the lower pressing plate 30 close to the upper pressing plate 20 . The negative pressure suction cups 41 are used to adsorb the membrane electrode 10 .

[0043] In this configuration, multiple negative pressure suction cups 41 are attached to the membrane electrode 10, forming negative pressure to adsorb the membrane electrode 10, and adsorb the membrane electrode 10 to the lower pressing plate 30, so as to prevent the membrane electrode 10 from adhering to the upper pressing plate 20 and moving with the upper pressing plate 20. In addition, the membrane electrode 10 is adsorbed by multiple negative pressure suction cups 41, and the force on the membrane electrode 10 is more uniform, so that the membrane electrode 10 is prevented from being damaged.

[0044] Furthermore, in a specific embodiment of the present invention, the negative pressure unit 40 further includes a pressure gauge, and the pressure gauge is used to detect the pressure in the negative pressure suction cup 41 .

[0045] In this arrangement, the pressure gauge determines whether the membrane electrode 10 is placed on the lower pressing plate 30 by the pressure in the negative pressure suction cup 41. The pressure gauge detects the pressure in the negative pressure suction cup 41, and by the change in the reading of the pressure gauge, it can be determined whether the membrane electrode 10 is placed on the lower pressing plate 30. When the reading of the pressure gauge changes, the membrane electrode 10 adhered to the upper pressing plate 20 can be retrieved in time to prevent the membrane electrode 10 from falling and being damaged or lost.

[0046] Furthermore, in a specific embodiment of the present invention, the negative pressure unit 40 also includes a negative pressure generator, which is connected to a plurality of negative pressure suction cups 41 , and the negative pressure generator is used to make the negative pressure suction cups 41 generate negative pressure to adsorb the membrane electrode 10 .

[0047] In this configuration, the negative pressure generator is connected to multiple negative pressure suction cups 41 respectively. The negative pressure generator causes the negative pressure suction cups 41 to generate negative pressure to adsorb the membrane electrode 10, and adsorbs the membrane electrode 10 on the lower pressure plate 30 to prevent the membrane electrode 10 from sticking to the upper pressure plate 20 and moving with the upper pressure plate 20, causing the membrane electrode 10 to fall or be lost.

[0048] Furthermore, in a specific embodiment of the present invention, the negative pressure part 40 includes an air source and a solenoid valve, the air source is connected to the negative pressure generator, the solenoid valve is arranged between the air source and the negative pressure generator, the air source is used to provide gas to the negative pressure generator, and the solenoid valve is used to control the on and off between the air source and the negative pressure generator.

[0049] With such arrangement, the gas source provides gas to the negative pressure generator, which generates negative pressure through the gas source, thereby causing multiple negative pressure suction cups 41 to adsorb the membrane electrode 10, adsorbing the membrane electrode 10 to the lower pressure plate 30, thereby preventing the membrane electrode 10 from sticking to the upper pressure plate 20 and moving with the upper pressure plate 20.

[0050] Furthermore, in a specific embodiment of the present invention, the negative pressure suction cup 41 includes a fixed section and an adsorption section that are connected to each other, and one end of the fixed section away from the adsorption section is fixedly connected to the lower pressure plate 30 . The adsorption section is made of soft silicone and is connected to the membrane electrode 10 .

[0051] In this way, the adsorption section is connected to the membrane electrode 10 to adsorb the membrane electrode 10. The adsorption section is made of soft silicone, so that the adsorption section can fit the surface of the membrane electrode 10 more closely, and the negative pressure suction cup 41 adsorbs the membrane electrode 10 more firmly, so that the membrane electrode 10 can be adsorbed on the lower pressing plate 30 by the negative pressure suction cup 41, and is not easy to adhere to the upper pressing plate 20 and move with the upper pressing plate 20, thereby avoiding the membrane electrode 10 from falling and causing damage or loss. The fixing section is connected to the adsorption section, and the fixing section fixes the adsorption section on the surface of the lower pressing plate 30.

[0052] Furthermore, in a specific embodiment of the present invention, the fixing section has an external thread, and the fixing section is threadedly connected to the lower pressing plate 30 .

[0053] In this configuration, the fixing section has an external thread, the lower pressing plate 30 has a threaded hole, and the external thread is screwed into the threaded hole to achieve a threaded connection between the fixing section and the lower pressing plate 30. The threaded connection makes the connection between the negative pressure suction cup 41 and the lower pressing plate 30 more secure, and when the membrane electrode 10 is adhered to the upper pressing plate 20, the negative pressure suction cup 41 will not be pulled out with the membrane electrode 10.

[0054] like Figure 1 As shown, the pressure plate structure also includes a limit block 50, which is arranged on one side of the lower pressure plate 30 close to the upper pressure plate 20. The upper pressure plate 20 has a limit groove 21, and the membrane electrode 10 has a positioning hole. The limit block 50 passes through the positioning hole of the membrane electrode 10 and is connected to the limit groove 21.

[0055] In this configuration, the limit block 50 is disposed on the lower pressing plate 30, and the upper pressing plate 20 has a limit groove 21. When the upper pressing plate 20 is fitted with the lower pressing plate 30, the limit block 50 cooperates with the limit groove 21, thereby realizing accurate positioning of the upper pressing plate 20 and the lower pressing plate 30. The limit block 50 passes through the positioning hole of the membrane electrode 10 to accurately position the placement of the membrane electrode 10. Through the configuration of the limit groove 21 and the limit block 50, the accurate positioning of the upper pressing plate 20, the membrane electrode 10, and the lower pressing plate 30 is ensured, making the placement of the membrane electrode 10 more convenient and the operation difficulty of testing the air tightness of the membrane electrode lower.

[0056] like Figure 3 As shown, the pressure plate structure also includes a sealing strip 60. The upper pressure plate 20 has a sealing groove 24. The sealing strip 60 is fixed in the sealing groove 24. The sealing strip 60 presses the edge of the membrane electrode to press the membrane electrode against the lower pressure plate 30. A sealed cavity is formed between the upper pressure plate 20, the sealing strip 60 and the membrane electrode 10.

[0057] In this configuration, the upper pressing plate 20 has a sealing groove 24, and the sealing groove 24 is used to place the sealing strip 60. The sealing strip 60 is fixedly arranged in the sealing groove 24. When the upper pressing plate 20 and the lower pressing plate 30 press the membrane electrode 10, a sealed cavity is formed between the upper pressing plate 20, the sealing strip 60 and the membrane electrode 10. The air tightness of the membrane electrode 10 can be tested by passing gas into the sealed cavity. When the gas in the sealed cavity passes through the membrane electrode 10 to reach between the lower pressing plate 30 and the membrane electrode 10, the air tightness of the membrane electrode is poor; when the gas in the sealed cavity cannot pass through the membrane electrode, the air tightness of the membrane electrode is good.

[0058] like Figure 1 and Figure 2 As shown, the upper pressing plate 20 has an air inlet 22 and a first exhaust hole 23, and the lower pressing plate 30 has a second exhaust hole 31. The air inlet 22 is used to inflate the sealed cavity.

[0059] When the membrane electrode 10 has good air tightness, the gas is discharged from the first exhaust hole 23 . When the membrane electrode 10 leaks, the gas passes through the membrane electrode 10 and enters between the membrane electrode 10 and the lower pressing plate 30 to be discharged from the second exhaust hole 31 .

[0060] In this way, a sealed cavity is formed between the upper pressing plate 20, the sealing strip 60 and the membrane electrode 10. The upper pressing plate 20 has an air inlet 22, and the gas enters the sealed cavity through the air inlet 22 to detect the air tightness of the membrane electrode 10. When the air tightness of the membrane electrode 10 is good, the gas entering the sealed cavity through the air inlet 22 cannot pass through the membrane electrode 10, and the gas in the sealed cavity leaves the sealed cavity through the first exhaust hole 23. When the membrane electrode 10 leaks, the gas entering the sealed cavity through the air inlet 22 passes through the membrane electrode 10 and enters between the membrane electrode 10 and the lower pressing plate 30. At this time, the gas is discharged through the second exhaust hole 31, so that the membrane electrode 10 is tested to be leaking.

[0061] According to another aspect of the utility model, a membrane electrode airtightness detection device is provided, including a main body, a slide rail, a clamping piece and the above-mentioned pressure plate structure, one end of the clamping piece is movably connected to the main body, and the other end of the clamping piece is connected to the upper pressure plate 20, the main body has an operating table, the slide rail is arranged on the operating table in a horizontal direction, the clamping piece is arranged above the operating table, the lower pressure plate 30 is slidably connected to the slide rail, and the lower pressure plate 30 moves back and forth along the slide rail. After the membrane electrode 10 is placed on the lower pressure plate 30, the lower pressure plate 30 moves along the slide rail to the bottom of the upper pressure plate 20, and the clamping piece drives the upper pressure plate 20 to fit with the lower pressure plate 30 to clamp the membrane electrode 10.

[0062] In this arrangement, the lower pressure plate 30 moves along the slide rail. When the lower pressure plate 30 moves along the slide rail to the loading position, the membrane electrode 10 is placed on the lower pressure plate 30. After the lower pressure plate 30 carries the membrane electrode 10, it moves along the slide rail to the bottom of the upper pressure plate 20. The clamping member drives the upper pressure plate 20 downward to fit with the lower pressure plate 30 to clamp the membrane electrode 10, thereby completing the airtightness test of the membrane electrode 10.

[0063] The advantages of this solution are:

[0064] 1. A negative pressure suction cup 41 is provided to adsorb the membrane electrode 10. The membrane electrode 10 is adsorbed on the lower pressing plate 30 by the negative pressure suction cup 41 to prevent the membrane electrode 10 from adhering to the upper pressing plate 20, causing the membrane electrode 10 to move with the upper pressing plate 20, resulting in the membrane electrode 10 falling and causing the membrane electrode 10 to be lost or damaged;

[0065] 2. A plurality of negative pressure suction cups 41 are provided to adsorb the membrane electrode 10, so that the membrane electrode 10 is subjected to a relatively uniform force and can be attached to the surface of the lower pressing plate 30, thereby avoiding damage to the membrane electrode 10 caused by uneven force, and achieving the purpose of preventing the membrane electrode 10 from being adhered and carried away by the upper pressing plate 20 and not damaging the membrane electrode 10;

[0066] 3. The adsorption section of the negative pressure suction cup 41 is made of soft silicone, and the adsorption section is connected to the membrane electrode 10 to adsorb the membrane electrode 10. The adsorption section is made of soft silicone, so that the adsorption section can fit the surface of the membrane electrode 10 more closely, and the negative pressure suction cup 41 adsorbs the membrane electrode 10 more firmly, so that the membrane electrode 10 can be adsorbed on the lower pressing plate 30 by the negative pressure suction cup 41, and is not easy to adhere to the upper pressing plate 20 and move with the upper pressing plate 20, thereby avoiding the membrane electrode 10 from falling and causing damage or loss;

[0067] 4. The setting of the limit block 50 and the limit groove 21, through the cooperation of the limit block 50 and the limit groove 21, the upper pressing plate 20 and the lower pressing plate 30 are accurately positioned. The limit block 50 passes through the positioning hole of the membrane electrode 10 to accurately position the placement position of the membrane electrode 10.

[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0069] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0070] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0071] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0072] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0073] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

Claims

1. A pressure plate structure, characterized in that: include: Upper pressing plate (20); A lower pressing plate (30), the upper pressing plate (20) and the lower pressing plate (30) move relative to each other, the lower pressing plate (30) is used to carry the membrane electrode (10), and the upper pressing plate (20) and the lower pressing plate (30) are used to clamp the membrane electrode (10) to complete airtightness detection; A negative pressure portion (40), the negative pressure portion (40) being arranged on the lower pressure plate (30), and the negative pressure portion (40) being used to adsorb the membrane electrode (10).

2. The pressing plate structure according to claim 1, characterized in that: The negative pressure part (40) comprises a plurality of negative pressure suction cups (41), wherein the negative pressure suction cups (41) are arranged on a side of the lower pressure plate (30) close to the upper pressure plate (20), and the negative pressure suction cups (41) are used to adsorb the membrane electrode (10).

3. The pressing plate structure according to claim 2, characterized in that: The negative pressure part (40) further comprises a pressure gauge, and the pressure gauge is used to detect the pressure in the negative pressure suction cup (41).

4. The pressure plate structure according to claim 2, characterized in that: The negative pressure part (40) further comprises a negative pressure generator, which is connected to the plurality of negative pressure suction cups (41), and is used to cause the negative pressure suction cups (41) to generate negative pressure to adsorb the membrane electrode (10).

5. The pressing plate structure according to claim 4, characterized in that: The negative pressure part (40) comprises an air source and an electromagnetic valve, wherein the air source is connected to the negative pressure generator, and the electromagnetic valve is arranged between the air source and the negative pressure generator. The air source is used to provide gas to the negative pressure generator, and the electromagnetic valve is used to control the connection between the air source and the negative pressure generator.

6. The pressure plate structure according to claim 2, characterized in that: The negative pressure suction cup (41) comprises a fixing section and an adsorption section which are connected to each other, wherein one end of the fixing section away from the adsorption section is fixedly connected to the lower pressing plate (30), the adsorption section is made of soft silica gel, and the adsorption section is connected to the membrane electrode (10).

7. The pressing plate structure according to claim 1, characterized in that: The pressure plate structure also includes a limit block (50), the limit block (50) is arranged on a side of the lower pressure plate (30) close to the upper pressure plate (20), the upper pressure plate (20) has a limit groove (21), the membrane electrode (10) has a positioning hole, and the limit block (50) passes through the positioning hole of the membrane electrode (10) and is connected to the limit groove (21).

8. The pressing plate structure according to claim 1, characterized in that: The pressure plate structure also includes a sealing strip (60). The upper pressure plate (20) has a sealing groove (24). The sealing strip (60) is fixed in the sealing groove (24). The sealing strip (60) presses the edge of the membrane electrode to press the membrane electrode against the lower pressure plate (30). A sealed cavity is formed between the upper pressure plate (20), the sealing strip (60) and the membrane electrode (10).

9. The pressing plate structure according to claim 8, characterized in that: The upper pressing plate (20) has an air inlet hole (22) and a first air outlet hole (23), and the lower pressing plate (30) has a second air outlet hole (31). The air inlet hole (22) is used to inflate the sealed cavity.

10. A membrane electrode airtightness detection device, characterized in that: It comprises a main body, a slide rail, a clamping member and a pressure plate structure as claimed in any one of claims 1 to 9, one end of the clamping member is movably connected to the main body, and the other end of the clamping member is connected to the upper pressure plate (20), the main body has an operating table, the slide rail is arranged on the operating table in a horizontal direction, the clamping member is arranged above the operating table, the lower pressure plate (30) is slidably connected to the slide rail, and the clamping member is used to drive the upper pressure plate (20) and the lower pressure plate (30) to fit together to clamp the membrane electrode (10).

Images