Hydrogen test device and hydrogen test system

Abstract

The invention relates to a hydrogen test device and a hydrogen test system, and the hydrogen test device is used for carrying out a hydrogen test on a diaphragm and comprises a pulse tube which comprises a first pulse tube section and a second pulse tube section which are coaxially arranged and are communicated with each other, sound wave generators are formed in the first pulse pipe section and the second pulse pipe section, the first pulse pipe section and the second pulse pipe section are detachably connected together in a sealed mode in the axial direction, the heating device is used for heating one of the first pulse pipe section and the second pulse pipe section, and the heating device is used for heating the other one of the first pulse pipe section and the second pulse pipe section. The cooling device is used for cooling the other one of the first pulse pipe section and the second pulse pipe section, and the diaphragm is used for being arranged between the first pulse pipe section and the second pulse pipe section so as to separate the first pulse pipe section from the second pulse pipe section. The hydrogen test device provided by the invention is simple in structure, high in test efficiency and high in reliability.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydrogen performance testing, and in particular, to a hydrogen testing device and a hydrogen testing system. Background Art

[0002] A diaphragm compressor is a device that compresses gas into high-pressure gas by the reciprocating motion of a diaphragm. The diaphragm of a diaphragm compressor is generally made of metal materials, and the diaphragm is subjected to alternating loads in a high-pressure hydrogen environment for a long time. The diaphragm's ability to resist hydrogen embrittlement in a high-pressure hydrogen environment affects the service life of the diaphragm, and thus affects the service life, reliability and safety of the diaphragm compressor. Therefore, it is particularly important to test the hydrogen performance of the diaphragm to ensure the life, reliability and safety of the diaphragm compressor.

[0003] In the related art, the diaphragm is usually installed in the diaphragm compressor, and the hydrogen performance test is carried out on a dedicated compressor test platform. The structure of the compressor test platform system is usually complex, and it takes time and effort to carry out an experiment. When there is a problem with the diaphragm, the entire compressor test platform system may need to be disassembled, cleaned and assembled. The test cost is high, the test cycle is long and the safety is low. Summary of the invention

[0004] The purpose of the present disclosure is to provide a hydrogen testing device, which has a simple structure, fast testing efficiency and high reliability.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a hydrogen testing device, which is used to perform a hydrogen testing on a diaphragm and includes: a pulse tube, including a first pulse tube segment and a second pulse tube segment that are coaxially arranged and interconnected, wherein an acoustic wave generator is formed in the first pulse tube segment and the second pulse tube segment, and the first pulse tube segment and the second pulse tube segment are axially detachably sealed and connected together; a heating device, wherein the heating device is used to heat one of the first pulse tube segment and the second pulse tube segment; a cooling device, wherein the cooling device is used to cool the other of the first pulse tube segment and the second pulse tube segment; wherein the diaphragm is used to be arranged between the first pulse tube segment and the second pulse tube segment to separate the first pulse tube segment and the second pulse tube segment.

[0006] Optionally, the first pulse tube segment is connected to the second pulse tube segment via a flange structure, the flange structure includes a first flange and a second flange, one of the first flange and the second flange is arranged on the first pulse tube segment, and the other is arranged on the second pulse tube segment, the first flange and the second flange are detachably connected together, wherein the diaphragm is arranged between the first flange and the second flange.

[0007] Optionally, the flange structure further includes a seal, which is disposed between the first flange and the second flange to establish sealing between the first flange and the second flange.

[0008] Optionally, the heating device is configured as a first heat exchanger, and the first heat exchanger is disposed on the first pulse tube segment to heat the first pulse tube segment.

[0009] Optionally, the first heat exchanger is arranged at an end of the first pulse tube segment away from the second pulse tube segment, and the temperature of the first heat exchanger is 300°C-900°C.

[0010] Optionally, the cooling device is configured as a second heat exchanger, and the second heat exchanger is disposed on the second pulse tube segment to cool the second pulse tube segment.

[0011] Optionally, the second heat exchanger is arranged at an end of the second pulse tube segment away from the first pulse tube segment, and the temperature of the second heat exchanger is 0°C-30°C.

[0012] Optionally, the length of the first pulse tube segment is 100-150 mm, and the diameter is 50-200 mm, and / or the length of the second pulse tube segment is 100-150 mm, and the diameter is 50-200 mm.

[0013] Optionally, hydrogen is provided in the pulse tube, and the purity of the hydrogen is not less than 99.999%.

[0014] On the basis of the above scheme, the present disclosure further provides a hydrogen testing system, which is provided with the above hydrogen testing device.

[0015] Through the above technical solution, in the hydrogen testing device provided by the present disclosure, by placing the diaphragm between the first pulse tube segment and the second pulse tube segment, heating one of the first pulse tube segment and the second pulse tube segment by a heating device, cooling the other of the first pulse tube segment and the second pulse tube segment by a cooling device, and generating sound waves by a sound wave generator, the diaphragm is tested in the hydrogen environment by simulating the cyclical working mode of the diaphragm compressor by the thermoacoustic principle. Wherein, the diaphragm is located between the first pulse tube segment and the second pulse tube segment to separate the first pulse tube segment and the second pulse tube segment, so that when one of the first pulse tube segment and the second pulse tube segment is heated and the other is cooled, low-pressure areas and high-pressure areas will appear on both sides of the diaphragm, and the sound waves generated by the sound wave generator can cause gas molecules to vibrate back and forth between the low-pressure area and the high-pressure area, so that the gas on both sides of the diaphragm contracts and expands alternately, and as the frequency of the sound wave increases, the amplitude will increase, and eventually the diaphragm will produce a cyclical reciprocating motion, so that a cyclical reciprocating working mode of the diaphragm in the diaphragm compressor can be formed. When the hydrogen testing device is used to perform a hydrogen testing on the diaphragm, there is no need to rely on the compressor testing platform system. The diaphragm only needs to be installed on the first pulse tube segment and the second pulse tube segment and sealed to connect the first pulse tube segment and the second pulse tube segment. Then, the heating device, the cooling device and the sound wave generator can be used. The structure is simple and the operation is convenient. In addition, when the diaphragm is tested by the hydrogen testing device, the test efficiency is fast and the test safety is high, which is beneficial to the test reliability.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of a hydrogen testing device provided according to a specific embodiment of the present disclosure.

[0019] Description of Reference Numerals

[0020] 1-pulse tube; 11-first pulse tube section; 12-second pulse tube section;

[0021] 2-flange structure; 21-first flange; 22-second flange; 23-seal;

[0022] 3-heating device; 31-first heat exchanger; 311-electric heating rod;

[0023] 4-cooling device, 41-second heat exchanger; 411-first connecting pipe; 412-second connecting pipe

[0024] 100-Diaphragm. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to the "inside" and "outside" relative to the contour of the corresponding component itself. In addition, the use of words such as "first" and "second" is intended to distinguish different components and does not have order and importance. In addition, when referring to the drawings in the following description, the same symbols in different drawings represent the same elements. It should be understood by those skilled in the art that the above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0027] According to a specific embodiment of the present disclosure, a hydrogen testing device is provided. Figure 1 An embodiment of the hydrogen testing device is shown. Figure 1 As shown, the hydrogen test device is used to perform a hydrogen test on a diaphragm 100 and includes: a pulse tube 1, including a first pulse tube segment 11 and a second pulse tube segment 12 that are coaxially arranged and interconnected, wherein the first pulse tube segment 11 and the second pulse tube segment 12 are both provided with an acoustic wave generator and the first pulse tube segment 11 and the second pulse tube segment 12 are detachably sealed and connected together along the axial direction; a heating device 3, wherein the heating device 3 is used to heat one of the first pulse tube segment 11 and the second pulse tube segment 12; a cooling device 4, wherein the cooling device 4 is used to cool the other of the first pulse tube segment 11 and the second pulse tube segment 12; wherein the diaphragm 100 is used to be arranged between the first pulse tube segment 11 and the second pulse tube segment 12 to separate the first pulse tube segment 11 and the second pulse tube segment 12.

[0028] Through the above technical scheme, in the hydrogen testing device provided by the present invention, by placing the diaphragm 100 between the first pulse tube segment 11 and the second pulse tube segment 12, and heating one of the first pulse tube segment 11 and the second pulse tube segment 12 by the heating device 3, cooling the other of the first pulse tube segment 11 and the second pulse tube segment 12 by the cooling device 4, and generating sound waves by the sound wave generator, the diaphragm 100 is tested in the hydrogen environment by simulating the reciprocating working mode of the diaphragm compressor through the thermoacoustic principle. Among them, the diaphragm 100 is located between the first pulse tube segment 11 and the second pulse tube segment 12 to separate the first pulse tube segment 11 and the second pulse tube segment 12, so that when one of the first pulse tube segment 11 and the second pulse tube segment 12 is heated and the other is cooled, low-pressure areas and high-pressure areas will appear on both sides of the diaphragm 100 (that is, a temperature gradient is generated on both sides of the diaphragm), and the sound waves generated by the sound wave generator can cause the gas molecules to vibrate back and forth between the low-pressure area and the high-pressure area, so that the gas on both sides of the diaphragm 100 alternately contracts and expands. As the frequency of the sound wave increases, the amplitude will increase, which will eventually cause the diaphragm 100 to produce a cyclic reciprocating motion, thereby forming a working mode similar to the cyclic reciprocating motion of the diaphragm 100 in a diaphragm compressor. When the diaphragm 100 is subjected to a hydrogen test using the hydrogen test device, it is no longer necessary to rely on the compressor test platform system. The diaphragm 100 only needs to be installed on the first pulse tube segment 11 and the second pulse tube segment 12 and sealed to connect the first pulse tube segment 11 and the second pulse tube segment 12. After that, the heating device 3, the cooling device 4 and the sound wave generator can be operated. The structure is simple and the operation is convenient. In addition, when the diaphragm 100 is tested by the hydrogen test device, the test efficiency is fast and the test safety is high, which is beneficial to the test reliability.

[0029] It should be noted that the structure and working principle of the pulse tube 1 are well known to those skilled in the art. For example, the pulse tube 1 can be a device for generating gas discharge, which is usually composed of a hollow metal cathode, a closed anode and a glass tube filled with a working gas (such as hydrogen). Among them, when the working gas is hydrogen, when a high-voltage power supply applies voltage, electrons are emitted from the metal cathode and collide with hydrogen molecules. These collisions cause the atoms and ions of hydrogen to be excited or ionized to discharge. Here, the present disclosure does not elaborate. In addition, the first pulse tube segment 11 and the second pulse tube segment 12 are formed with a sound wave generator, which can be understood as the first pulse tube segment 11 and the second pulse tube segment 12 are both provided with a sound wave generator or the first pulse tube segment 11 and the second pulse tube segment 12 can be formed as a sound wave generator capable of generating sound waves (for example, the first pulse tube segment 11 and the second pulse tube segment select a suitable diameter and length, then they themselves will vibrate, and then can generate sound waves), and the present disclosure does not impose any restrictions on this. In addition, the thermoacoustic principle is to use a method combining thermodynamics and acoustics to simulate the cyclical working mode of the diaphragm compressor. Specifically, the two sides of the diaphragm 100 are formed into low-pressure areas and high-pressure areas respectively through the heating device 3 and the cooling device 4 (that is, a temperature gradient is generated on both sides of the diaphragm 100). When the sound waves are generated by the pulse tube 1, the sound waves can cause the gas molecules to vibrate back and forth between the corresponding low-pressure areas and high-pressure areas, respectively, so that the gas on both sides of the diaphragm 100 alternately contracts and expands. As the frequency of the sound waves increases, the amplitude will increase, and eventually the diaphragm 100 will produce a cyclical reciprocating motion, thereby forming a working mode similar to the cyclical reciprocating motion of the diaphragm 100 in the diaphragm compressor.

[0030] In the specific embodiment provided by the present disclosure, the first pulse tube segment 11 can be connected to the second pulse tube segment 12 in any suitable manner. Figure 1 As shown, the first pulse tube section 11 can be connected to the second pulse tube section 12 through the flange structure 2, the flange structure 2 includes a first flange 21 and a second flange 22, one of the first flange 21 and the second flange 22 is arranged on the first pulse tube section 11, and the other is arranged on the second pulse tube section 12, the first flange 21 and the second flange 22 are detachably connected together, wherein the diaphragm 100 is arranged between the first flange 21 and the second flange 22. Figure 1As shown, the first flange 21 is provided on the first pulse tube segment 11, the second flange 22 is provided on the second pulse tube segment 12, and the first flange 21 and the second flange 22 are detachably connected together by fasteners to connect and communicate the first pulse tube segment 11 and the second pulse tube segment 12. The diaphragm 100 is provided between the first flange and the second flange to separate the first pulse tube segment 11 and the second pulse tube segment 12. In other embodiments of the present disclosure, the first pulse tube segment 11 can be connected to the second pulse tube segment 12 by other suitable methods, and the present disclosure does not impose any limitation on this.

[0031] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the flange structure 2 may further include a seal 23, which is disposed between the first flange 21 and the second flange 22 to establish sealing between the first flange 21 and the second flange 22, effectively ensuring sealing between the first pulse tube segment 11 and the second pulse tube segment 12 when they are in a connected state to prevent leakage. The seal 23 may be constructed in any suitable manner, for example, the seal 23 may be constructed as a brass seal, and the present disclosure does not impose any limitation on this.

[0032] In the specific embodiments provided in the present disclosure, the heating device 3 can be constructed in any suitable manner. Figure 1 As shown, the heating device 3 can be configured as a first heat exchanger 31, and the first heat exchanger 31 can be disposed on the first pulse tube segment 11 to heat the first pulse tube segment 11. That is, the first heat exchanger 31 is used to heat the first pulse tube segment 11 so that the side of the diaphragm 100 close to the first pulse tube segment 11 forms a high-pressure area. In other embodiments of the present disclosure, the heating device 3 can also be configured in any other suitable manner, and the present disclosure does not impose any limitation on this.

[0033] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the first heat exchanger 31 can be arranged at one end of the first pulse tube section 11 away from the second pulse tube section 12, and the temperature of the first heat exchanger 31 is 300°C-900°C. The first heat exchanger 31 is arranged at one end of the first pulse tube section 11 away from the second pulse tube section 12, so as to heat the first pulse tube section 11. The first heat exchanger 31 can be constructed in any suitable manner. Optionally, refer to Figure 1As shown, the first heat exchanger 31 may include a first heat exchange body and an electric heating rod 311. One end of the electric heating rod 311 is arranged outside the first heat exchange body to form a connecting portion, which is used to connect an external power supply element, and the other end is inserted into the first heat exchange body to form a heating portion. The heating portion can exchange heat with the first pulse tube segment 11 by self-heating, and then be used to heat the hydrogen in the first pulse tube segment 11. The efficiency of the electric heating rod 311 can be 1kw-10kw, and the present disclosure does not impose any restrictions on this. In other embodiments of the present disclosure, the first heat exchanger 31 can also be other structural methods. For example, the first heat exchanger 31 may include a first heat exchange body, and the first heat exchange body is placed in a high-temperature water area, and the heat exchange body is heated by the high-temperature water area. The heat exchange body exchanges heat with the first pulse tube segment 11, and then is used to heat the hydrogen in the first pulse tube segment 11. The present disclosure does not impose any restrictions on this.

[0034] In the specific embodiments provided in the present disclosure, the cooling device 4 can be constructed in any suitable manner. Figure 1 As shown, the cooling device 4 can be configured as a second heat exchanger 41, and the second heat exchanger 41 is disposed on the second pulse tube segment 12 to cool the second pulse tube segment 12. That is, the second heat exchanger 41 is used to cool the second pulse tube segment 12, so that the side of the diaphragm 100 close to the second pulse tube segment 12 forms a low-pressure area. In other embodiments of the present disclosure, the cooling device 4 can also be configured in any other suitable manner, and the present disclosure does not impose any limitation on this.

[0035] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, the second heat exchanger 41 can be arranged at one end of the second pulse tube segment 12 away from the first pulse tube segment 11, and the temperature of the second heat exchanger 41 is 0°C-30°C. The second heat exchanger 41 is arranged at one end of the second pulse tube segment 12 away from the first pulse tube segment 11, so as to be used to cool the second pulse tube segment 12. The second heat exchanger 41 can be constructed in any suitable manner. Optionally, refer to Figure 1 As shown, the second heat exchanger 41 may include a second heat exchange body and a heat exchange tube, wherein the heat exchange tube has a tube body disposed in the second heat exchange body and a first connecting tube 411 and a second connecting tube 412 disposed outside the second heat exchange body, wherein the first connecting tube 411 is used to connect to the inlet of the tube body so as to allow heat exchange medium to pass into the tube body through the first connecting tube 411, and the second connecting tube 412 is used to connect to the outlet of the tube body so as to export the heat exchange medium in the tube body. The heat exchange medium may be adaptively selected according to actual needs, for example, the heat exchange medium may be water, and the present disclosure does not impose any limitation on this. In other embodiments of the present disclosure, the second heat exchanger 41 may also be of other construction methods, and the present disclosure does not impose any limitation on this.

[0036] Among them, the temperature of the first heat exchanger 31 and the second heat exchanger 41 can be adaptively selected according to actual needs to avoid excessive temperature difference on both sides of the diaphragm 100, which may cause the diaphragm 100 to rupture or be damaged. For example, the temperature of the first heat exchanger 31 may be 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, 900°C, etc., and the temperature of the second heat exchanger 41 may be 0°C, 5°C, 10°C, 15°C, 20°C, 25°C, 30°C, etc. In addition, the temperature value of the first heat exchanger 31 is selected according to different operating frequencies to meet the needs of the hydrogen performance test of the diaphragm 100. In this regard, the present disclosure does not impose any restrictions, and those skilled in the art can make adaptive selections according to actual needs.

[0037] In the specific embodiment provided in the present disclosure, the first pulse tube segment 11 and the second pulse tube segment 12 can be configured in any suitable manner. Figure 1 As shown, the length of the first pulse tube segment 11 can be 100-150mm, the diameter can be 50-200mm, and / or the length of the second pulse tube segment 12 can be 100-150mm, the diameter can be 50-200mm. By setting the first pulse tube segment 11 and the second pulse tube segment 12 to have a suitable diameter and a suitable length, so that they can vibrate themselves and then generate sound waves, on the one hand, it is convenient to simulate the cyclic working mode of the diaphragm compressor through the thermoacoustic principle to test the diaphragm 100 in the presence of hydrogen, and on the other hand, it makes the structure of the device simpler and reduces the cost. In other embodiments of the present disclosure, the first pulse tube segment 11 and the second pulse tube segment 12 can also be other configurations, respectively, and the present disclosure does not impose any restrictions on this.

[0038] In the specific embodiments provided in the present disclosure, reference is made to Figure 1 As shown, hydrogen may be provided in the pulse tube 1 , and the purity of the hydrogen is not less than 99.999% (≥5n), which is beneficial to improving the safety, reliability and robustness of the diaphragm 100 test.

[0039] On the basis of the above scheme, the present disclosure also provides a hydrogen testing system, which is provided with the above hydrogen testing device. The hydrogen testing system can save the testing cost of the diaphragm 100, speed up the development speed of the diaphragm 100, improve the testing efficiency of the diaphragm 100, and also improve the safety, stability and reliability of the testing process of the diaphragm 100.

[0040] Next, the present disclosure will provide a detailed description of the testing process of the diaphragm 100 in combination with the above specific implementations. The details are as follows:

[0041] S1. Select the working condition of the diaphragm to be tested, wherein the working condition of the diaphragm to be tested at least includes selecting the required hydrogen pressure, working frequency and working time, the temperature value of the high-temperature end of the diaphragm to be tested (hereinafter referred to as the high-temperature selected value), the temperature value of the low-temperature end (hereinafter referred to as the low-temperature selected value), and the length (hereinafter referred to as the length selected value) and diameter (hereinafter referred to as the diameter selected value) of the pulse tube 1.

[0042] S2. Select the first pulse tube 11 and the second pulse tube 12 of appropriate specifications according to the selected length value and the selected diameter value, select the first heat exchanger 31 and the second heat exchanger 41 according to the selected high temperature value and the selected low temperature value, install the first heat exchanger 31 on the first pulse tube 11, install the second heat exchanger 41 on the second pulse tube 12, and then install the diaphragm to be tested between the first flange 21 and the second flange 22, and lock and seal the first flange 21 and the second flange 22.

[0043] S3. Hydrogen is continuously charged into the first pulse tube 11 and the second pulse tube 12 until the pressure of the hydrogen reaches the selected pressure value, then the charging of hydrogen is stopped, and pressure-maintaining leak detection is performed to ensure that the first pulse tube 11 and the second pulse tube 12 are airtight. Two pressure sensors are used to monitor the hydrogen pressure in the first pulse tube 11 and the second pulse tube 12 in real time.

[0044] S4. Insert the electric heating rod 311 into the first heat exchange body or place the first heat exchange body in a high-temperature water area to heat the hydrogen in the first pulse tube segment 11 until the hydrogen temperature in the first pulse tube segment 11 reaches a high-temperature selected value, and place the second heat exchanger 41 in a low-temperature water area to cool the hydrogen in the second pulse tube segment 12 until the hydrogen temperature in the second pulse tube segment 12 reaches a low-temperature selected value, wherein a first temperature sensor is used to monitor the hydrogen temperature in the first pulse tube segment 11 in real time, and a second temperature sensor is used to monitor the hydrogen temperature in the second pulse tube segment 12 in real time.

[0045] S5. The hydrogen in the first pulse tube 11 and the second pulse tube 12 begins to vibrate back and forth under the temperature gradient, and the operating frequency of the reciprocating motion of the hydrogen is calculated through the pressure values ​​of the two pressure sensors.

[0046] S6, recording the temperature value in the first pulse tube 11, the temperature value in the second pulse tube 12, the pressure value of hydrogen, the operating frequency of hydrogen, the test time and the diaphragm number;

[0047] S7. After the test is completed, remove the diaphragm to be tested and test the material properties of the diaphragm to be tested under high-pressure hydrogen medium.

[0048] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0050] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A hydrogen testing device, characterized in that: The hydrogen testing device is used to perform a hydrogen testing on a diaphragm and comprises: A pulse tube, comprising a first pulse tube segment and a second pulse tube segment which are coaxially arranged and interconnected, wherein a sound wave generator is formed in the first pulse tube segment and the second pulse tube segment, and the first pulse tube segment and the second pulse tube segment are detachably sealed and connected together along the axial direction; a heating device, the heating device being used to heat one of the first pulse tube segment and the second pulse tube segment; a cooling device, the cooling device being used to cool the other of the first pulse tube segment and the second pulse tube segment; The diaphragm is used to be arranged between the first pulse tube segment and the second pulse tube segment to separate the first pulse tube segment from the second pulse tube segment.

2. The hydrogen testing device according to claim 1, characterized in that: The first pulse tube section is connected to the second pulse tube section through a flange structure, the flange structure includes a first flange and a second flange, one of the first flange and the second flange is arranged on the first pulse tube section, and the other is arranged on the second pulse tube section, and the first flange and the second flange are detachably connected together, Wherein, the diaphragm is arranged between the first flange and the second flange.

3. The hydrogen testing device according to claim 2, characterized in that: The flange structure further includes a sealing member disposed between the first flange and the second flange to establish sealing between the first flange and the second flange.

4. The hydrogen testing device according to claim 1, characterized in that: The heating device is configured as a first heat exchanger, and the first heat exchanger is disposed on the first pulse tube segment to heat the first pulse tube segment.

5. The hydrogen testing device according to claim 4, characterized in that: The first heat exchanger is arranged at one end of the first pulse tube section away from the second pulse tube section, and the temperature of the first heat exchanger is 300° C.-900° C.

6. The hydrogen testing device according to claim 1, characterized in that: The cooling device is configured as a second heat exchanger, and the second heat exchanger is disposed on the second pulse tube segment to cool the second pulse tube segment.

7. The hydrogen testing device according to claim 6, characterized in that: The second heat exchanger is arranged at an end of the second pulse tube section away from the first pulse tube section, and the temperature of the second heat exchanger is 0°C-30°C.

8. The hydrogen testing device according to claim 1, characterized in that: The first pulse tube segment has a length of 100-150 mm and a diameter of 50-200 mm, and / or The second pulse tube segment has a length of 100-150 mm and a diameter of 50-200 mm.

9. The hydrogen testing device according to claim 1, characterized in that: The pulse tube is provided with hydrogen, and the purity of the hydrogen is not less than 99.999%.

10. A hydrogen testing system, characterized in that: The hydrogen testing system is provided with the hydrogen testing device according to any one of claims 1-9.

Images