Mechanical device for detecting air tightness of exhaust valve and use method

Abstract

The invention discloses a mechanical device for air tightness detection of an exhaust valve and a use method. The device comprises an air outlet end pressure gauge, an air outlet end pipeline, a fixed block, a sliding block, an air inlet end pressure gauge, an air inlet end pipeline, a dowel bar, a connecting plate, an adapter plate, a bottom plate and an air cylinder. During testing, the sliding block and the fixing block fix the tested exhaust valve, gas sequentially passes through the gas inlet end pressure gauge, the gas inlet end pipeline, the sliding block, the tested exhaust valve, the fixing block, the gas outlet end pipeline and the gas outlet end pressure gauge to form a complete detection gas path, and the pressure gauge is used for detecting the pressure change of the gas path after passing through the tested exhaust valve. Whether the sealing performance of the exhaust valve is in a reasonable range is detected. The design is simple in operation, strong in versatility and low in cost, the air tightness of the exhaust valve to be tested is checked through a simple cylinder pushing action by observing the difference value of the pressure gauges at the air inlet end and the air outlet end, the one-time loading and unloading time is less than or equal to 50s, and the experiment requirement is conveniently and rapidly met.

Description

technical field [0001] The invention relates to the field of exhaust valve detection, in particular to a mechanical device and a use method for air tightness detection of an exhaust valve. Background technique [0002] Usually, there are various methods for the airtightness of the exhaust valve. The traditional airtightness test method is the water soaking method. Its judgment standard, but this method is obviously not suitable for electronic products. Most of the airtightness detection methods of exhaust valves have low airtightness leak detection efficiency, repeated disassembly and assembly, verification, many structural parts, difficult assembly, insufficient data quantification, failure to meet test requirements and operational safety, etc. question. [0003] In the patent document CN201620132720, a fuel cell plate leak detection device is disclosed, which includes a quick fastening device and a leak detection mold. The fast fastening device includes an upper fixing p...

AI Technical Summary

Problems solved by technology

The advantage of the connection method of this device is that the structure is stable, the fixing of the detection mold and the bipolar plate is relatively simple, and it is easy to operate. It is suitable for fuel cell plates that are almost flat in shape, but it is obviously not suitable for exhaust valves with three-dimensional shapes. Its fixing method and mold setting are not suitable. The most critical defect is the pressure detection through the pressure sensor. After the pressure detected by the pressure sensor is intuitively displayed through the pressure gauge, the air leakage characteristics cannot be directly judged, and special air leakage is required. Dense leak detector directly affects the test efficiency

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