Hydrogen energy membrane electrode pressure difference method airtight test equipment

Abstract

The utility model relates to the technical field of membrane electrode pressure difference method airtight testing, in particular to hydrogen energy membrane electrode pressure difference method airtight testing equipment. The device comprises a compressed air triple piece, and communicating pipes are installed at the two ends of the inner wall of the compressed air triple piece; the inflation valve is positioned on one side of the compressed air triple piece; the pressure controller is located on the side, away from the compressed air triple piece, of the inflation valve. The standard cavity is mounted on the surface of one end of the communicating pipe; and the test cavity is arranged at a position corresponding to the standard cavity by virtue of a communicating pipe. The problems that according to a common air pressure leak detection method, gas with large pressure needs to be introduced into one side of a membrane electrode, then pressure value drop is detected after pressure maintaining is conducted for a period of time, at the moment, a mapping communication valve in the membrane electrode is regulated and controlled, a handle on the surface of a valve body is likely to be touched by mistake, and leakage of the membrane electrode is caused are solved. And the position of the valve rod is deflected.

Description

Technical Field

[0001] The present application relates to the technical field of membrane electrode pressure differential method airtightness testing, and in particular to hydrogen energy membrane electrode pressure differential method airtightness testing equipment. Background Art

[0002] A hydrogen fuel cell stack consists of bipolar plates, membrane electrodes, and other auxiliary components. The core of the stack is formed by alternating layers of bipolar plates and membrane electrodes. The membrane electrode is a very thin, sheet-like component made of a soft, elastic material. Because leaks in a single membrane electrode can cause gases in the stack core to cross-flow between the hydrogen chamber and the air chamber, the airtightness of the reaction zone of the single membrane electrode must be tested before the stack core is packaged. This is a common test for membrane electrode airtightness.

[0003] In the prior art, a utility model such as the one with the announcement number CN217786466U specifically discloses a membrane electrode airtightness test device, which includes a testing part and a calibration part, wherein the testing part includes a accommodating cavity and a test gas circuit, the air inlet of the accommodating cavity is connected to the air outlet of the test gas circuit, the accommodating cavity is used to accommodate the membrane electrode, and the test gas circuit is configured to perform an airtightness test on the membrane electrode, and the calibration part includes a calibration branch, the air inlet of the calibration branch is connected to the air outlet of the test gas circuit, and a first switch and a standard leak hole are provided on the calibration branch, the first switch is configured to control the conduction or cutoff of the calibration branch, and the standard leak hole is configured to calibrate the test accuracy of the testing part. As a result, the membrane electrode airtightness test device can conveniently and accurately detect the accuracy of the membrane electrode airtightness test device as a whole, and the reliability of the detection result is high, thereby facilitating accurate calibration of the membrane electrode airtightness test device.

[0004] In the membrane electrode air tightness test, the existing technology measures the air tightness of the membrane electrode by detecting the amount of gas that penetrates from the membrane electrode to the other side. Usually, the air pressure leak detection method requires introducing gas with a higher pressure on one side of the membrane electrode, and then maintaining the pressure for a period of time and then detecting the pressure drop to test the membrane electrode air tightness. At this time, the calibration connecting valve will be regulated, and it is easy to accidentally touch the handle on the valve body surface, causing the valve stem position to deflect. Utility Model Content

[0005] A technical problem to be solved by this application is that the usual air pressure leak detection method requires the introduction of gas at a relatively high pressure on one side of the membrane electrode, followed by maintaining the pressure for a period of time and then detecting the pressure drop to perform an air tightness test on the membrane electrode. At this time, the calibration connecting valve will be regulated, and it is easy to accidentally touch the handle on the surface of the valve body, causing the valve stem position to deflect.

[0006] To solve the above technical problems, the embodiment of the present application provides a hydrogen membrane electrode pressure differential method airtightness testing device, comprising: a compressed air triplex, with connecting pipes installed at both ends of the inner wall of the compressed air triplex;

[0007] Inflating valve, the inflation valve is located on one side of the compressed air triplex;

[0008] Pressure controller: The pressure controller is located on the side of the inflation valve away from the compressed air triplex;

[0009] Standard cavity, which is installed on one end surface of the connecting pipe;

[0010] The test cavity is installed in the corresponding position of the standard cavity with the help of a connecting pipe;

[0011] Differential pressure gauge, located at the end where the standard cavity and the test cavity are close to each other;

[0012] Pressure relief valve, which is located at the end of the test chamber away from the differential pressure gauge;

[0013] A test and communication valve is located on one side of the pressure relief valve; the test and communication valve includes a valve body, the inner wall of the valve body is rotatably connected to a valve stem, and the upper end surface of the valve stem is fixedly connected to a handle; and

[0014] An adjusting device is installed on the surface of the marking and connecting valve;

[0015] Among them, the adjusting device includes a fixed frame, the bottom end of the fixed frame is fixedly connected to the surface of the valve body, the arc surface of the inner wall of the fixed frame is rotatably connected to a rotating plate, the upper end surface of the rotating plate is fixedly connected to a clamping block, the arc surface of the valve stem is fixedly connected to a fixed gear ring, and the tooth surface of the fixed gear ring is clamped with the surface of the clamping block.

[0016] In some embodiments, the adjustment device further includes two coil springs, which are respectively located at the two ends of the arc surface of the inner wall of the fixing frame. The coil springs are nested with the inner wall of the fixing frame, and the two ends of the coil springs are respectively fixedly connected to the rotating plate and the fixing frame.

[0017] In some embodiments, the cross section of the clamping block is in the shape of an inverted triangle, and the clamping block is a hard block.

[0018] In some embodiments, a squeeze pad is fixedly connected to the surface of the clamping block. The squeeze pad is a rubber pad, and the surface of the squeeze pad is clamped with the tooth surface of the fixed gear ring.

[0019] In some embodiments, a pull ring is rotatably connected to one side of the surface of the rotating plate, and the length of the pull ring is adapted to the length of the rotating plate.

[0020] In some embodiments, the arc surface of the valve stem is fixedly connected to a connecting plate, one end of the connecting plate is rotatably connected to a sliding rod, the surface of the valve body is fixedly connected to a sliding frame, the cross-section of the sliding frame is arc-shaped, the inner wall of the sliding frame is slidably connected to the arc surface of the sliding rod, and the side wall of the sliding frame is fixedly connected to a scale plate.

[0021] In some embodiments, the arc surface of the sliding rod is fixedly connected to an indicator rod, and the cross-section of one end of the indicator rod close to the scale plate is in a pointed cone shape.

[0022] Through the above technical solution, the hydrogen energy membrane electrode pressure differential method airtightness testing equipment provided by the present application requires different membrane electrodes for fuel cell systems with different power and performance, and the membrane electrode airtightness detection generally requires customization of different testing equipment. During the test process, the pressure differential method airtightness testing equipment can be used for assistance. The pressure differential method airtightness testing equipment consists of a test chamber, a differential pressure gauge, a standard chamber, a pressure relief valve, a calibration connecting valve, a pressure controller, an inflation valve, a compressed air triplet and a connecting pipe. The entire equipment requires few parts, low cost, and complete functions. At the same time, the pressure controller accurately controls the pressure on the cathode and anode sides of the membrane electrode to protect the membrane electrode from being damaged. In this process, in order to avoid the valve stem in the calibration connecting valve from rotating out of position, the rotating plate in the adjusting device can be used to allow the fixed block on the surface of the rotating plate to be clamped and limited with the fixed tooth ring on the surface of the valve stem, so as to effectively and conveniently squeeze and fix the position of the entire valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the hydrogen membrane electrode pressure difference method airtightness testing equipment disclosed in the embodiment of the present application;

[0025] Figure 2 This is a partial schematic diagram of the three-dimensional structure of the hydrogen membrane electrode pressure differential method airtightness testing equipment disclosed in the embodiment of the present application;

[0026] Figure 3 This is a structural diagram of a calibration and connecting valve of a hydrogen membrane electrode pressure differential method airtightness testing device disclosed in an embodiment of the present application;

[0027] Figure 4 This is the hydrogen energy membrane electrode pressure difference method airtightness test equipment disclosed in the embodiment of this application Figure 3 A schematic diagram of the structure enlarged at point A;

[0028] Figure 5 This is a schematic structural diagram of the regulating device of the hydrogen membrane electrode pressure differential method airtightness testing equipment disclosed in an embodiment of the present application;

[0029] Figure 6 It is a partial structural diagram of the regulating device of the hydrogen energy membrane electrode pressure difference method airtightness testing equipment disclosed in the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Connecting pipe; 2. Compressed air triplex; 3. Inflating valve; 4. Adjusting device; 401. Fixed gear ring; 402. Fixed frame; 403. Coil spring; 404. Rotating plate; 405. Pull ring; 406. Extrusion pad; 407. Sliding frame; 408. Connecting plate; 409. Sliding rod; 410. Indicator rod; 411. Scale plate; 412. Block; 5. Marking connecting valve; 51. Valve body; 52. Handle; 53. Valve stem; 6. Standard chamber; 7. Differential pressure gauge; 8. Test chamber; 9. Pressure relief valve; 10. Pressure controller. DETAILED DESCRIPTION

[0032] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present application, but are not intended to limit the scope of the present application. The present application may be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.

[0033] The present application provides these embodiments to make this application thorough and complete, and to fully express the scope of this application to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0034] It should be noted that, in the description of this application, unless otherwise specified, "plurality" means greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicating directions or positional relationships, are intended solely to facilitate the description of this application and simplify the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0035] In addition, the terms "first," "second," and similar terms used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the word include the elements listed after the word, and do not exclude the possibility of other elements being included.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0037] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0038] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0039] Reference Figure 1 、 Figure 2 and Figure 3 As shown, the utility model provides a technical solution: a hydrogen membrane electrode pressure difference method airtightness test device, comprising a compressed air triplex 2, with connecting pipes 1 installed at both ends of the inner wall of the compressed air triplex 2;

[0040] The inflation valve 3 is located on one side of the compressed air triplex 2;

[0041] The pressure controller 10 is located on the side of the inflation valve 3 away from the compressed air triplex 2;

[0042] A standard cavity 6 is installed on one end surface of the connecting pipe 1;

[0043] The test chamber 8 is installed at the corresponding position of the standard chamber 6 by means of the connecting pipe 1;

[0044] A differential pressure gauge 7 is located at one end of the standard cavity 6 and the test cavity 8 close to each other;

[0045] A pressure relief valve 9 is located at one end of the test chamber 8 away from the differential pressure gauge 7;

[0046] The marking connecting valve 5 is located on one side of the pressure relief valve 9; the marking connecting valve 5 includes a valve body 51, the inner wall of the valve body 51 is rotatably connected to a valve stem 53, and the upper end surface of the valve stem 53 is fixedly connected to a handle 52; and

[0047] The regulating device 4 is installed on the surface of the calibration and connecting valve 5. The test equipment mainly consists of a test chamber 8, a differential pressure gauge 7, a standard chamber 6, a pressure relief valve 9, a calibration and connecting valve 5, a pressure controller 10, an air charging valve 3, a compressed air triplex 2 and a connecting pipe 1. The entire equipment requires few parts, is low in cost, and has complete functions.

[0048] First, the membrane electrode cavity is closed, all valves are opened, and exhaust is performed. Then, for inflation, the calibration valve 5 and the inflation valve 3 are opened, and the other valves are closed. The pressure controller 10 is opened and inflated to the set value, such as 50kPa, and the pressure controller 10 is closed. Then, for pressure stabilization, the calibration valve 5 is opened, and the other valves are closed. The pressure is stabilized for a period of time, such as 30s. When testing, the calibration valve 5 is closed, and the test countdown is started according to the set time after stabilization. The reading P1 of the differential pressure gauge 7 is read, and the test time is set to 60s. At the end of the test, the reading P2 of the differential pressure gauge 7 is read. P2-P1 is the pressure difference test result. Finally, exhaust is performed, all valves are opened, exhaust is performed, and the cavity is opened.

[0049] The specific configuration and function of the regulating device 4 will be described in detail below.

[0050] Reference Figure 4 、 Figure 5 and Figure 6 As shown, in this embodiment: the regulating device 4 includes a fixed frame 402, the bottom end of the fixed frame 402 is fixedly connected to the surface of the valve body 51, the inner wall arc surface of the fixed frame 402 is rotatably connected to the rotating plate 404, the upper end surface of the rotating plate 404 is fixedly connected to the clamping block 412, the arc surface of the valve stem 53 is fixedly connected to the fixed gear ring 401, the tooth surface of the fixed gear ring 401 is clamped with the surface of the clamping block 412, when the position of the valve stem 53 is locked and limited, the rotating plate 404 on the inner wall of the fixed frame 402 can be rotated, so that the clamping block 412 fixed on one side of the upper end of the rotating plate 404 is clamped and fixed with the fixed gear ring 401 installed on the surface of the valve stem 53, thereby effectively avoiding the rotational deviation of the position of the valve stem 53.

[0051] The adjusting device 4 also includes two coil springs 403, which are respectively located at the two ends of the inner wall arc surface of the fixing frame 402, and the coil springs 403 are nested with the inner wall of the fixing frame 402. The two ends of the coil spring 403 are respectively fixedly connected to the rotating plate 404 and the fixing frame 402. The torsional force generated by the coil spring 403 can squeeze and limit the position of the rotating plate 404 in the fixing frame 402 to prevent the rotating plate 404 from loosening and falling off. The cross-section of the clamping block 412 is an inverted triangle shape, and the clamping block 412 is a hard block. The surface of the clamping block 412 is fixedly connected with an extrusion pad 406, which is a rubber pad. The extrusion pad 406 made of rubber can increase the friction force, making it convenient for the clamping block 412 made of carbide at the upper end of the rotating plate 404 to be clamped and fixed with the fixed gear ring 401, and the surface of the extrusion pad 406 is clamped with the tooth surface of the fixed gear ring 401.

[0052] A pull ring 405 is rotatably connected to one side of the surface of the rotating plate 404. The length of the pull ring 405 matches the length of the rotating plate 404. When adjusting the position of the rotating plate 404, the pull ring 405 on one side of the rotating plate 404 can be used for auxiliary operation. The arc surface of the valve stem 53 is fixedly connected to the connecting plate 408. One end of the connecting plate 408 is rotatably connected to the sliding rod 409. The surface of the valve body 51 is fixedly connected to the sliding frame 407. The cross-section of the sliding frame 407 is arc-shaped. The inner wall of the sliding frame 407 is aligned with the sliding rod 409. The arc surface of the valve stem 53 is slidably connected, and the side wall of the sliding frame 407 is fixedly connected with a scale plate 411. The arc surface of the sliding rod 409 is fixedly connected with an indicator rod 410. The cross-section of the end of the indicator rod 410 close to the scale plate 411 is conical. In the process of rotating the valve stem 53, the connecting plate 408 and the sliding rod 409 on the surface of the valve stem 53 can be used to slide along the sliding frame 407. At the same time, the scale plate 411 fixed on the side wall of the sliding frame 407 is used for auxiliary observation, which facilitates intuitive deflection operation of the rotation angle of the valve stem 53.

[0053] So far, the various embodiments of the present application have been described in detail. To avoid obscuring the concept of the present application, some details well known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0054] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, as long as there are no structural conflicts, the various technical features mentioned in the various embodiments may be combined in any manner.

Claims

1. Hydrogen membrane electrode pressure difference method airtightness test equipment, characterized by: include: A compressed air triplex (2), wherein connecting pipes (1) are installed at both ends of the inner wall of the compressed air triplex (2); An air charging valve (3), the air charging valve (3) being located on one side of the compressed air triplex (2); A pressure controller (10), the pressure controller (10) being located on a side of the inflation valve (3) away from the compressed air triplex (2); A standard cavity (6), the standard cavity (6) being mounted on one end surface of the connecting pipe (1); A test cavity (8), the test cavity (8) being installed at a position corresponding to the standard cavity (6) by means of a connecting pipe (1); A differential pressure gauge (7), the differential pressure gauge (7) being located at one end of the standard cavity (6) and the test cavity (8) close to each other; a pressure relief valve (9), the pressure relief valve (9) being located at an end of the test chamber (8) away from the differential pressure gauge (7); A calibration and communication valve (5), the calibration and communication valve (5) being located on one side of the pressure relief valve (9); the calibration and communication valve (5) comprising a valve body (51), the inner wall of the valve body (51) being rotatably connected to a valve stem (53), the upper end surface of the valve stem (53) being fixedly connected to a handle (52); and An adjusting device (4), wherein the adjusting device (4) is mounted on the surface of the marking and connecting valve (5); The regulating device (4) includes a fixed frame (402), the bottom end of the fixed frame (402) is fixedly connected to the surface of the valve body (51), the inner wall arc surface of the fixed frame (402) is rotatably connected to a rotating plate (404), the upper end surface of the rotating plate (404) is fixedly connected to a clamping block (412), the arc surface of the valve stem (53) is fixedly connected to a fixed gear ring (401), and the tooth surface of the fixed gear ring (401) is clamped to the surface of the clamping block (412).

2. The hydrogen membrane electrode pressure differential method airtightness testing equipment according to claim 1, characterized in that: The regulating device (4) further comprises two coil springs (403), the two coil springs (403) being respectively located at the two ends of the arc surface of the inner wall of the fixing frame (402), the coil springs (403) being nested with the inner wall of the fixing frame (402), and the two ends of the coil spring (403) being respectively fixedly connected to the rotating plate (404) and the fixing frame (402).

3. The hydrogen membrane electrode pressure differential method airtightness testing equipment according to claim 1, characterized in that: The cross section of the clamping block (412) is in the shape of an inverted triangle, and the clamping block (412) is a hard block.

4. The hydrogen membrane electrode pressure differential method airtightness testing equipment according to claim 1, characterized in that: The surface of the clamping block (412) is fixedly connected with a compression pad (406), which is a rubber pad. The surface of the compression pad (406) is clamped with the tooth surface of the fixed gear ring (401).

5. The hydrogen membrane electrode pressure differential method airtightness testing equipment according to claim 1, characterized in that: A pull ring (405) is rotatably connected to one side of the surface of the rotating plate (404), and the length of the pull ring (405) is adapted to the length of the rotating plate (404).

6. The hydrogen membrane electrode pressure differential method airtightness testing equipment according to claim 1, characterized in that: The arc surface of the valve stem (53) is fixedly connected to a connecting plate (408), one end of the connecting plate (408) is rotatably connected to a sliding rod (409), the surface of the valve body (51) is fixedly connected to a sliding frame (407), the cross-section of the sliding frame (407) is arc-shaped, the inner wall of the sliding frame (407) is slidably connected to the arc surface of the sliding rod (409), and the side wall of the sliding frame (407) is fixedly connected to a scale plate (411).

7. The hydrogen membrane electrode pressure differential method airtightness testing equipment according to claim 6, characterized in that: The arc surface of the sliding rod (409) is fixedly connected to an indicator rod (410), and the cross section of one end of the indicator rod (410) close to the scale plate (411) is in a pointed cone shape.

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