Low-temperature valve airtightness test device

Abstract

The invention relates to a low-temperature valve airtightness test device, and belongs to the technical field of technological equipment. The test device is mainly and technologically characterized by comprising a left vertical plate, an O-shaped sealing ring I, an inlet joint, an outlet joint, an O-shaped sealing ring II, a pressing base, an end cover, an ejector rod, a right vertical plate, a lock nut, a handle, connecting bolts I, a guide groove, connecting bolts II, a supporting shaft, a bottom plate and connecting bolts III. The outlet joint, the left vertical plate and the right vertical plate are fixed to the two symmetrical ends of the upper end face of the bottom plate through the connecting bolts I, a connector with a guide conical surface is arranged at the right end of the inlet joint, the O-shaped sealing ring I is installed in a groove in the right end face of the inlet joint, a connector with a guide conical surface is arranged at the left end of the pressing base, the O-shaped sealing ring II is installed in a groove in the left end face of the pressing base, and the pressing base and the ejector rod are connected into a whole through the end cover. The low-temperature valve airtightness test device has the advantages of being compact and reasonable in structure, convenient and fast to use and maintain, capable of being reused, low in manufacturing cost and the like.

Description

Technical field [0001] The invention relates to a low-temperature valve air tightness test device, belonging to the technical field of process equipment, and is mainly suitable for testing the sealing performance of low-temperature insulated gas cylinder valves. Background technique [0002] The cryogenic valves used in cryogenic insulated gas cylinders have strict requirements on air tightness, especially when the storage medium is flammable and explosive materials. At present, there are various types of cryogenic valves in China, and their functions and structures are also different. The test device for detecting the air tightness requirements of the valve also needs to be equipped with different structures. In the background art, when testing the air tightness of cryogenic valves in China, almost always use a transitional threaded joint to connect between the tested valve and the external pipeline, and the threaded joint is used as an intermediate connection bridge. Although ...

AI Technical Summary

Problems solved by technology

Although this traditional method can be used to test the air tightness of the valve, the work efficiency is low. Since most of the valve body is made of brass, the traditional connection method is easy to damage the valve body thread, and the copper shavings, copper Debris such as wire and raw tape used for sealing are more likely to enter the valve body, making the sealing surface of the valve unclean, resulting in the sealing performance of the valve not meeting the process requirements

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