A test system for high-pressure gas seal detection based on nitrogen replacement
A technology of nitrogen replacement and high-pressure gas, applied in the direction of applying stable tension/pressure to test the strength of materials, using liquid/vacuum to measure liquid tightness, and detecting the appearance of fluid at leak points, etc., can solve problems that are not fully considered Auxiliary module design for safety protection, imperfect test system and other issues, to achieve the effect of ensuring safety
Active Publication Date: 2021-08-03
TSINGHUA UNIV
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Problems solved by technology
At present, the existing test system in China is not perfect enough, and the design of the auxiliary module for safety protection under the service condition of high-pressure hydrogen environment has not been fully considered.
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[0030]The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0031] Such as figure 1 As shown, a test system for high-pressure gas seal detection based on nitrogen replacement in the present invention includes a high-pressure chamber 7 and a gland 3 thereof. Between the outer wall of the cover 3 and the high pressure chamber 7. The leakage channel between the seal 2 to be tested and the high-pressure chamber 7 communicates with the air pipe 4 through the air hole opened on the gland 3, and the air pipe 4 finally communicates with the pool 5, and the camera 6 is arranged above the pool 5. The trachea 4 is used to introduce the leaked gas generated by the high-pressure chamber 7 into the pool 5, and the camera 6 records the gas leakage of the high-pressure chamber 7, and the bubble counting method is used to calculate the leakage amount by the number and size of the bubbles generated by the leaked gas per u...
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A test system for high-pressure gas seal detection based on nitrogen replacement, including a high-pressure chamber with a gland, the seal to be tested is located between the outer wall of the gland and the high-pressure chamber, and the leakage channel between the seal to be tested and the high-pressure chamber passes through the open The air hole on the gland is connected to the trachea, and the end of the trachea is connected to the pool; the hydrogen gas inlet is connected to the high-pressure chamber and a pressurization processing module for hydrogen pressurization is arranged on the connecting pipeline, and the unloading port is connected to the nitrogen gas inlet. The high-pressure chamber is equipped with a nitrogen replacement and unloading module for nitrogen replacement and test gas unloading in the high-pressure chamber on the connecting pipeline. The invention uses the nitrogen replacement and unloading module to realize the nitrogen replacement in the high-pressure chamber for a controllable time, and automatically unloads after the nitrogen replacement, ensuring the safety of the test system before the hydrogen seal detection. It can also cool the pressurized gas. After the system is pressurized, the additional air source will gradually cool the parts of the pressurized passage to protect the test system and prolong the service life.
Description
technical field [0001] The invention belongs to the technical field of high-pressure gas sealing, and in particular relates to a testing system for high-pressure gas sealing detection based on nitrogen replacement. Background technique [0002] The shortage of energy resources and environmental degradation caused by excessive reliance on fossil fuels are serious and urgent problems faced by countries all over the world. Countries all over the world are actively promoting the development of clean, environmentally friendly and efficient energy. Due to its various sources, high energy conversion rate, no pollution, zero emissions, storability, and renewable advantages, hydrogen energy has become a secondary energy source with great development prospects. Using hydrogen energy as the next generation energy carrier is expected to solve the problem of energy supply. , safety and cleanliness are key issues. In view of this, all countries in the world are stepping up the planning a...
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IPC IPC(8): G01M3/06G01N3/12
CPCG01M3/06G01N3/12
Inventor 郭飞黄毅杰项冲张兆想程甘霖谭磊贾晓红王玉明
Owner TSINGHUA UNIV