Hydrogen storage cylinder combination valve test system

Abstract

The utility model discloses a hydrogen storage cylinder combination valve test system, the hydrogen storage cylinder combination valve test system comprises a gas source module, a refrigeration module, a test module and a control module, the output end of the gas source module and the output end of the refrigeration module are respectively connected with the input end of the test module; the control module is respectively connected with the air source module, the test module and the refrigeration module, the test module comprises a box body, a valve test mounting position is arranged in the box body, and at least one of a salt mist spraying piece, a heating piece and a vacuum bin is further arranged in the box body. According to the utility model, through mutual cooperation of the modules, at least one of salt spray test, high-temperature test, vacuum airtightness detection and low-temperature test can be carried out on a gas source in one tool, the integration level is high, and various test requirements of the vehicle high-pressure hydrogen storage cylinder combination valve are met.

Description

Technical Field

[0001] The utility model relates to the technical field of valve testing, in particular to a combined valve testing system for a hydrogen storage cylinder. Background Art

[0002] High-pressure hydrogen storage cylinder combination valves for automobiles are installed on fuel cell vehicle hydrogen storage cylinders to control the opening and closing of hydrogen in the cylinders. Factory tests for high-pressure hydrogen storage cylinder combination valves generally include "high temperature testing," "low temperature testing," and "air tightness testing," and high-pressure hydrogen cylinder valves are available in two different specifications: 35MPa and 70MPa. The existing factory testing process for high-pressure hydrogen storage cylinder combination valves is as follows: For each of these factory tests, various tooling equipment is prepared, each used to test one of the indicators. After testing one indicator, the next tooling equipment is manually replaced and tested for the next indicator. This process is repeated until all indicators are tested.

[0003] However, in the above technical solution, many devices and tooling are required for testing, and the test equipment needs to be replaced manually frequently. The degree of automation is low, the process is complicated, the efficiency is low, and it is easy to cause safety problems due to misoperation. The integration of the test equipment is low, and each tooling can only perform one test with a single function, which cannot meet the various testing requirements of the combination bottle valve. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art, namely, that the testing equipment and tooling required are numerous, the testing equipment needs to be frequently and manually replaced, the efficiency is low, and the integration of the testing equipment is low, each tooling can only perform one test, and the multiple testing requirements of the combination bottle valve cannot be met.

[0005] To this end, one purpose of the present invention is to propose a hydrogen storage cylinder combination valve testing system, which includes a gas source module, a refrigeration module, a test module and a control module. The output end of the gas source module and the output end of the refrigeration module are respectively connected to the input end of the test module. The control module is respectively connected to the gas source module, the test module and the refrigeration module. The test module includes a box body, a valve test installation position is set in the box body, and at least one of a salt spray component, a heating component and a vacuum chamber is also set in the box body. The control module controls the test module to perform at least one of a salt spray test, a high temperature test, a vacuum air tightness test and a low temperature test on the gas provided by the gas source module.

[0006] In some embodiments, the output end of the gas source module is connected to the input end of the test module through the boosting module, the gas storage and pressure regulating module and the refrigeration module in sequence, and the controller is connected to the boosting module and the gas storage and pressure regulating module respectively.

[0007] In some embodiments, the gas storage and pressure regulating module includes a gas pressure regulating pipeline, on which a second gas storage container and a first pressure regulating valve connected in sequence are provided, and the first pressure regulating valve is used to adjust the gas pressure value output by the second gas storage container to the pressure value required for the test.

[0008] In some embodiments, a first pressure sensor is provided at the output end of the second gas storage container, and the controller is configured to control the boosting module to boost pressure according to a first pressure value measured by the first pressure sensor until a second pressure value measured by the first pressure sensor reaches the pressure value required for the test.

[0009] In some embodiments, the gas storage and pressure regulating module further includes a safety unloading pipeline, on which a first safety valve is provided, the first end of the first safety valve is provided at the input end of the second gas storage container, and the second end of the first safety valve is connected to the external atmosphere.

[0010] In some embodiments, the gas source module includes a plurality of first gas storage containers.

[0011] In some embodiments, the boosting module includes a boosting pump, and two ends of the boosting pump are respectively connected to the first output end of the first gas storage container and the input end of the second gas storage container.

[0012] In some embodiments, the test module includes a high-pressure gas pipeline and a low-pressure gas pipeline, and a first air inlet and a second air inlet are provided on the box body. The two ends of the high-pressure gas pipeline are respectively connected to the output end of the gas pressure regulating pipeline and the first air inlet, and the two ends of the low-pressure gas pipeline are respectively connected to the second output end and the second air inlet of the first gas storage container. The high-pressure gas pipeline and the low-pressure gas pipeline are connected to the box body through a one-way valve.

[0013] In some embodiments, a third air inlet is provided on the shell of the vacuum chamber, and the third air inlet is connected to the first air inlet through a pipeline.

[0014] In some embodiments, a precooling module is provided between the gas storage and pressure regulating module and the testing module, the input end of the precooling module is connected to the output end of the gas pressure regulating pipeline, and the output end of the precooling module is connected to the first air inlet.

[0015] In some embodiments, the precooling module includes a precooler, an input end of the precooler is connected to an output end of the high-pressure gas pipeline, and an output end of the precooler is connected to the first air inlet of the box.

[0016] The present invention provides a hydrogen storage cylinder combined valve test system with the following features:

[0017] Beneficial effects:

[0018] The test system includes an air source module, a refrigeration module, a test module and a control module. The output end of the air source module and the output end of the refrigeration module are respectively connected to the input end of the test module. The control module is respectively connected to the air source module, the test module and the refrigeration module. The test module includes a box body, a valve test installation position is set in the box body, and at least one of a salt spray spray part, a heating part and a vacuum chamber is also set in the box body. At least one of salt spray test, high temperature test, vacuum air tightness test and low temperature test can be completed on the air source in one tool. Not only can vacuum air tightness test related to gas medium be realized, but also high temperature environment test, low temperature environment test and salt spray environment test can be realized in the same tool body. It has high integration and meets various testing requirements for vehicle high-pressure hydrogen storage cylinder combination valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention 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 recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a control flow chart of a hydrogen storage cylinder combined valve test system in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of a gas storage and pressure regulating module of a hydrogen storage cylinder combined valve test system in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of a test module of a hydrogen storage cylinder combined valve test system in an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of a vacuum chamber of a hydrogen storage cylinder combined valve test system in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of a pre-cooling module of a hydrogen storage cylinder combined valve test system in an embodiment of the present utility model;

[0025] Reference numerals:

[0026] 1. Gas source module; 2. Booster module; 3. Gas storage and pressure regulating module; 4. Refrigeration module; 5. Test module; 51. Box; 52. Salt spray spray component; 53. Vacuum chamber; 531. Third air inlet; 54. Second temperature sensor; 55. Hydrogen sensor; 56. Helium mass spectrometer leak detector; 6. Control module; 7. Precooling module; 71. Precooler; 100. Gas pressure regulating pipeline; 101. Second gas storage container; 102. First pressure regulating valve; 103. First filter; 104. First one-way valve; 105. Second filter; 106. First stop valve; 107. First solenoid valve; 108. First pressure sensor; 109. Second pressure sensor; 110. First temperature sensor ;111, pressure gauge;112, bursting disc;200, safety unloading pipeline;201, first safety valve;202, second stop valve;300, high-pressure gas pipeline;301, third filter;302, third stop valve;303, fourth pressure gauge;304, third pressure sensor;305, second solenoid valve;306, second one-way valve;400, low-pressure gas pipeline;401, third one-way valve;500, test branch;501, fourth stop valve;600, gas input pipeline;601, third manual stop valve;602, third solenoid valve;603, fourth filter;604, third temperature sensor;700, gas output pipeline;701, fourth solenoid valve. DETAILED DESCRIPTION

[0027] Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

[0028] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present invention will occur to those skilled in the art.

[0029] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0030] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0031] It should also be understood that although the present invention has been described with reference to certain specific examples, those skilled in the art will be able to surely realize many other equivalent forms of the present invention, which have the characteristics described in the claims and are therefore within the scope of protection defined thereby.

[0032] The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0033] Specific embodiments of the present invention will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present invention, which may be implemented in a variety of ways. Well-known and / or repetitive functions and structures are not described in detail to avoid obscuring the present invention with unnecessary or redundant detail. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but rather serve merely as a basis and representative basis for the claims to teach those skilled in the art to variously employ the present invention with substantially any suitable detailed structure.

[0034] The first embodiment of the present invention provides a hydrogen storage cylinder combined valve testing system, such as Figure 1-Figure 5 As shown, the hydrogen storage cylinder combination valve test system includes a gas source module 1, a refrigeration module 4, a test module 5 and a control module 6. The output end of the gas source module 1 and the output end of the refrigeration module 4 are respectively connected to the input end of the test module 5. The control module 6 is respectively connected to the gas source module 1, the test module 5 and the refrigeration module 4. The test module 5 includes a box body 51, and a valve test installation position is set in the box body 51. At least one of a salt spray spray part 52, a heating part and a vacuum chamber 53 is also set in the box body 51. The control module 6 controls the test module 5 to perform at least one of a salt spray test, a high temperature test, a vacuum air tightness test and a low temperature test on the gas provided by the gas source module 1.

[0035] Specifically, the gas source module 1 provides the test module 5 with test gas, and the gas can directly enter the test module 5. The refrigeration module 4 can provide a low-temperature environment for the test system. The test module 5 can provide the gas required for the combination valve test and can provide high and low temperature environments, salt spray environments and vacuum environments to meet various test requirements of the combination valve. The control module 6 can realize data collection and remote control of all other modules through a specific communication protocol. The test is controlled by the control module 6 to ensure the accuracy of the test results. Through the mutual cooperation of the modules, not only can the tests related to the gas medium be realized, but also at least one of the high temperature test, low temperature test, salt spray test and true air sealing test can be realized. There is no need to set up multiple tooling to perform multiple tests, thereby improving work efficiency.

[0036] In terms of spatial arrangement, the remote control module 6 is arranged separately from other modules involving high-pressure gas (for example, in different rooms), so that the operator is isolated from the high-voltage equipment, and the operator performs remote operation in a safe location, thereby improving test safety.

[0037] Furthermore, the output of the gas source module 1 can be connected to the input of the test module 5 via the booster module 2, the gas storage and pressure regulating module 3, and the refrigeration module 4, respectively. The control module 6 is connected to the booster module 2 and the gas storage and pressure regulating module 3, respectively. After being pressurized by the booster module 2, the gas enters the gas storage and pressure regulating module 3 for storage and is adjusted to the required pressure during testing. The booster module 2 and the gas storage and pressure regulating module 3 can be used to adjust the pressure of the gas entering the test module 5, allowing the combination valve to be tested under various pressures (e.g., high pressure), thereby increasing the applicability of the test system.

[0038] The gas source module 1 includes multiple first gas storage containers. Exemplarily, the gas source module 1 is composed of an array of gas cylinders containing different media, including hydrogen, nitrogen, helium, and others. The gas source module 1 provides test gas for the entire test system. The test gas is supplied to the test module 5 via the booster module 2 and the gas storage and pressure regulation module 3 during high-pressure gas testing, or directly to the test module 5 during low-pressure gas testing.

[0039] The boosting module 2 includes a boosting pump, whose two ends are connected to the first output end of the first gas storage vessel and the input end of the second gas storage vessel 101, respectively. The boosting pump is driven by compressed air and boosts the pressure of the gas in the gas source module 1. The boosted gas then enters the gas storage and pressure regulation module 3 for storage and pressure regulation. For example, the boosting module 2 comprises a two-stage boosting pump.

[0040] The gas storage and pressure regulating module 3 includes a gas pressure regulating pipeline 100, which is provided with a second gas storage container 101 and a first pressure regulating valve 102 connected in sequence. The first pressure regulating valve 102 is used to adjust the pressure of the gas output from the second gas storage container 101 to the pressure required for testing. Specifically, the gas pressure regulating pipeline 100 is also provided with a first filter 103, a first one-way valve 104, a second filter 105, a first shut-off valve 106, and a first solenoid valve 107. The first filter 103 is provided at the input end of the second gas storage container 101 to filter impurities in the tested gas before it enters the second gas storage container 101, preventing small solid particles from entering and damaging the various components of the gas storage and pressure regulating module 3. A second filter 105 is provided at the output end of the second gas storage container 101 to filter the gas before it enters the test module 5, preventing small solid particles from entering and damaging the various components of the test module 5. A first shut-off valve 106 is provided at the input end of the second gas storage container 101 to control the flow of the gas medium entering the second gas storage container 101 , and a first solenoid valve 107 is provided at the output end of the second gas storage container 101 to control the flow of the gas entering the test module 5 .

[0041] During testing, first shut-off valve 106 is opened, and the gas in gas source module 1 is injected into second gas storage container 101 after passing through first filter 103, first one-way valve 104, and first shut-off valve 106. Before reaching a specified pressure (test pressure), first solenoid valve 107 and first pressure regulating valve 102 are closed. After reaching the specified pressure, first solenoid valve 107 opens, and first pressure regulating valve 102 adjusts the output pressure to supply downstream test gas. This gas storage and pressure regulating module 3 can both temporarily store gas from gas source module 1 in second gas storage container 101 and regulate the pressure of the gas provided by gas source module 1 before supplying it to test module 5, enabling testing under test gas conditions of varying pressures.

[0042] A first pressure sensor 108 and a second pressure sensor 109 are also provided on the gas pressure regulating pipeline 100. Specifically, the first pressure sensor 108 is provided at the output end of the second gas storage container 101, and the gas pressure in the second gas storage container 101 is monitored by the first pressure sensor 108. The second pressure sensor 109 is provided at the output end of the gas pressure regulating pipeline 100, and the outlet pressure of the gas pressure regulating pipeline 100 is monitored by the second pressure sensor 109.

[0043] During testing, the gas can be pressurized by the booster module 2 and then regulated by the gas storage and pressure regulating module 3. If at least one of the gas source module 1 and the gas storage and pressure regulating module 3 needs maintenance, the module that needs maintenance can be shut down without affecting the continued operation of the test module 5.

[0044] During testing, the pressure can be increased and regulated simultaneously. This means that while the booster pump injects high-pressure gas into the second gas storage container 101, the first solenoid valve 107 and the first pressure regulating valve 102 are also open. The gas pressure regulating pipeline 100 directly supplies gas downstream. The control module 6 controls the booster pump of the booster module 2 to increase the pressure according to the first pressure value measured by the first pressure sensor 108 until the second pressure value measured by the first pressure sensor 108 reaches the pressure required for testing. The gas storage and pressure regulating module 3 can automatically replenish pressure to maintain a constant inlet pressure on the device under test, meeting the need for long-term constant-pressure gas demand. This simultaneous increase in pressure and regulation can shorten the response time of the gas storage and pressure regulating module 3 of the booster module 2 during testing, thereby improving the testing efficiency of the test system.

[0045] Among them, a first temperature sensor 110 is provided on the output end of the second gas storage container 101 for monitoring the temperature inside the second gas storage container 101. When the first temperature sensor 110 detects that the temperature of the second gas storage container 101 reaches a preset threshold, the control module 6 controls the gas source module 1 and / or the boosting module 2 to cut off the gas supply to the gas pressure regulating pipeline 100 to prevent overheating.

[0046] The gas storage and pressure regulating module 3 also includes a safety unloading pipeline 200, which is provided with a first safety valve 201 and a second shut-off valve 202. The first end of the first safety valve 201 is connected to the input end of the second gas storage container 101, and the second end of the first safety valve 201 is connected to the external atmosphere. The second shut-off valve 202 is provided at the output end of the gas pressure regulating pipeline 100. When the first pressure sensor 108 measures that the pressure inside the second gas storage container 101 exceeds a preset threshold, the control module 6 controls the first safety valve 201 to open, releasing high-pressure gas from the safety unloading pipeline 200 to prevent overpressure. The second shut-off valve 202 is used to connect the output pipeline of the second gas storage container 101 to the external atmosphere, further preventing overpressure.

[0047] The gas pressure regulating pipeline 100 is also provided with multiple pressure gauges 111, which are respectively arranged at various positions of the gas pressure regulating pipeline 100, such as the first pressure gauge, the second pressure gauge, and the third pressure gauge. A bursting disc 112 is provided at each pressure gauge 111. When the pressure value of the pressure gauge 111 reaches its preset threshold, the bursting disc ruptures and the high-pressure gas is released. In this way, the test system is prevented from overheating or overpressure to ensure safety.

[0048] The test module 5 includes a high-pressure gas pipeline 300 and a low-pressure gas pipeline 400 (source gas pipeline). A first gas inlet and a second gas inlet are provided on the housing 51. The two ends of the high-pressure gas pipeline 300 are respectively connected to the output end of the gas pressure regulating pipeline 100 and the first gas inlet, while the two ends of the low-pressure gas pipeline 400 are respectively connected to the second output end and the second gas inlet of the first gas storage container. The high-pressure gas pipeline 300 and the low-pressure gas pipeline 400 are connected to the housing 51 via a third one-way valve 401. Specifically, the hydrogen storage cylinder combination valve is installed in the valve test installation position within the housing 51. If high-pressure gas is required for testing, the high-pressure gas pipeline 300 is selected for gas supply. If the source gas pressure meets the required test pressure, or if the inlet pressure of the test piece is reduced from the maximum gas source pressure to a specified pressure, the low-pressure gas pipeline 400 is used for gas supply. A third one-way valve 401 is provided between the high-pressure gas line 300 and the low-pressure gas line 400 to prevent the high-pressure gas line 300 from entering the low-pressure gas line 400. Exemplarily, the salt mist spraying element 52 is a salt mist nozzle connected to an external salt mist pump; the heating element is an electric heating rod. The test module 5 can simulate a salt mist environment by spraying salt mist through the salt mist nozzle, simulate a high-temperature environment through the electric heating rod, simulate a low-temperature environment through the refrigeration module 4, and provide a vacuum environment through the vacuum chamber 53.

[0049] The test module 5 includes multiple test branches 500. The input of each test branch 500 is connected to the junction of the high-pressure gas pipeline 300 and the low-pressure gas pipeline 400. The output of each test branch 500 can be selectively connected to the first air inlet or the second air inlet. The provision of multiple test branches 500 allows for simultaneous testing of multiple DUTs. Each test branch 500 is provided with a fourth shut-off valve 501 to control the on / off state of the test branch 500.

[0050] Specifically, the housing 51 includes a built-in electric heater and fan. The heater provides a high-temperature environment, while the fan provides ventilation and heat dissipation. The housing 51 is connected to the refrigeration module 4 via a cooling pipe, providing a low-temperature environment. A second temperature sensor 54 is provided within the housing 51 for monitoring. A hydrogen sensor 55 is also located within the housing 51. When testing with hydrogen as a medium, if the hydrogen concentration reaches a preset threshold, the first solenoid valve 107 is closed and the fan is activated for ventilation.

[0051] A third filter 301 , a third stop valve 302 , a fourth pressure gauge 303 , a third pressure sensor 304 , a second solenoid valve 305 and a third one-way valve 401 are further provided on the high-pressure gas pipeline 300 and the low-pressure gas pipeline 400 , respectively.

[0052] There are multiple valve test installation positions, providing multiple test stations, which can test multiple workpieces at the same time. After the workpiece to be tested is installed once, it can be automatically operated according to the set program without repeated disassembly and assembly, and the test efficiency is high.

[0053] The airtightness test requires the use of a vacuum chamber 53, which has a third air inlet 531 on its housing. The chamber is connected to a vacuum pump and a helium mass spectrometer leak detector 56. During testing, the combined valve is installed in the chamber 53, which is then placed inside the housing 51. The third air inlet 531 is connected to the first air inlet via a pipeline.

[0054] A pre-cooling module 7 is provided between the gas storage and pressure regulating module 3 and the test module 5. The input end of the pre-cooling module 7 is connected to the output end of the gas pressure regulating pipeline 100, and the output end of the pre-cooling module 7 is connected to the first air inlet. The pre-cooling module 7 pre-cools the hydrogen gas before it enters the test module 5 and can maintain the low temperature environment required by the test module 5.

[0055] The precooling module 7 includes a precooler 71, the input end of the precooler 71 is connected to the output end of the high-pressure gas pipeline 300, and the output end of the precooler 71 is connected to the first air inlet of the box 51. Among them, a gas output pipeline 700 that does not pass through the precooler 71 is also provided between the input end of the precooler 71 and the output end of the precooler 71. A fourth solenoid valve 701 is provided on the gas output pipeline 700. The gas input pipeline 600 of the precooler 71 is provided with a third manual shut-off valve 601, a third solenoid valve 602, a fourth filter 603 and a third temperature sensor 604. When the precooling module 7 is not needed, the third solenoid valve 602 is closed, the fourth solenoid valve 701 is opened, and the hydrogen enters the test module 5 through the gas output pipeline 700 without cooling. When a precooling hydrogen shock experiment is performed, the fourth solenoid valve 701 is opened, the third solenoid valve 602 is closed, and the gas (such as hydrogen) flows through the precooler 71 for cooling. The control module 6 adjusts the cooling capacity of the refrigeration module 4 in real time according to the temperature value fed back by the third temperature sensor 604. A pre-cooling module 7 is provided to pre-cool the gas (eg, hydrogen) before it enters the test module 5, thereby realizing a pre-cooling hydrogen exposure test.

[0056] The test system has a wide range of applications. In addition to the combination valves for automotive high-pressure hydrogen storage cylinders, it can also test various hydrogen-related valves such as hydrogen filling ports, hydrogen filling guns, pressure reducing valves, one-way valves, stop valves, solenoid valves, and pneumatic valves.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0058] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0059] In the description of the present invention, “plurality” means two or more.

[0060] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0061] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0062] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hydrogen storage cylinder combined valve testing system, characterized in that: The invention comprises an air source module (1), a refrigeration module (4), a test module (5) and a control module (6), wherein the output end of the air source module (1) and the output end of the refrigeration module (4) are respectively connected to the input end of the test module (5), the control module (6) is respectively connected to the air source module (1), the test module (5) and the refrigeration module (4), the test module (5) comprises a box (51), a valve test installation position is provided in the box (51), and at least one of a salt spray component (52), a heating component and a vacuum chamber (53) is also provided in the box (51), and the control module (6) controls the test module (5) to perform at least one of a salt spray test, a high temperature test, a vacuum air tightness test and a low temperature test on the gas provided by the air source module (1).

2. The hydrogen storage cylinder combined valve testing system according to claim 1, characterized in that: The output end of the gas source module (1) is connected to the input end of the test module (5) via the boosting module (2), the gas storage and pressure regulating module (3) and the refrigeration module (4) in sequence, and the controller is connected to the boosting module (2) and the gas storage and pressure regulating module (3) respectively.

3. The hydrogen storage cylinder combined valve testing system according to claim 2, characterized in that: The gas storage and pressure regulating module (3) comprises a gas pressure regulating pipeline (100), on which a second gas storage container (101) and a first pressure regulating valve (102) connected in sequence are provided, and the first pressure regulating valve (102) is used to regulate the pressure value of the gas output by the second gas storage container (101) to a pressure value required for testing.

4. The hydrogen storage cylinder combined valve testing system according to claim 3, characterized in that: A first pressure sensor (108) is provided at the output end of the second gas storage container (101), and the controller is configured to control the boosting module (2) to boost pressure according to a first pressure value measured by the first pressure sensor (108) until a second pressure value measured by the first pressure sensor (108) reaches a pressure value required for testing.

5. The hydrogen storage cylinder combined valve testing system according to claim 3, characterized in that: The gas storage and pressure regulating module (3) further comprises a safety unloading pipeline (200), wherein a first safety valve (201) is provided on the safety unloading pipeline (200), wherein a first end of the first safety valve (201) is provided at an input end of the second gas storage container (101), and a second end of the first safety valve (201) is communicated with the external atmosphere.

6. The hydrogen storage cylinder combined valve testing system according to claim 3, characterized in that: The gas source module (1) comprises a plurality of first gas storage containers; The boosting module (2) comprises a boosting pump, and two ends of the boosting pump are respectively connected to the first output end of the first gas storage container and the input end of the second gas storage container (101).

7. The hydrogen storage cylinder combined valve testing system according to claim 6, characterized in that: The test module (5) comprises a high-pressure gas pipeline (300) and a low-pressure gas pipeline (400); a first air inlet and a second air inlet are provided on the box (51); two ends of the high-pressure gas pipeline (300) are respectively connected to the output end of the gas pressure regulating pipeline (100) and the first air inlet; two ends of the low-pressure gas pipeline (400) are respectively connected to the second output end of the first gas storage container and the second air inlet; the high-pressure gas pipeline (300) and the low-pressure gas pipeline (400) are connected to the box (51) via a one-way valve.

8. The hydrogen storage cylinder combined valve testing system according to claim 7, characterized in that: A third air inlet (531) is provided on the shell of the vacuum chamber (53), and the third air inlet (531) is connected to the first air inlet via a pipeline.

9. The hydrogen storage cylinder combined valve testing system according to claim 7, characterized in that: A precooling module (7) is provided between the gas storage and pressure regulating module (3) and the test module (5); the input end of the precooling module (7) is connected to the output end of the gas pressure regulating pipeline (100); and the output end of the precooling module (7) is connected to the first air inlet.

10. The hydrogen storage cylinder combined valve testing system according to claim 9, characterized in that: The precooling module (7) comprises a precooler (71), the input end of the precooler (71) is connected to the output end of the high-pressure gas pipeline (300), and the output end of the precooler (71) is connected to the first air inlet of the box (51).

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