Gas welding sealing process of 60 MPa ultrahigh-pressure cylinder

Abstract

The invention relates to a gas welding sealing process of a 60 MPa ultrahigh-pressure cylinder. The gas welding sealing process comprises a high-pressure cylinder filling method, a sealing method and a pressure welding sealing method. According to the gas welding sealing process, a welding sealing fixture is designed, so as to fill the cylinder, and a filling and releasing replacement method is adopted, so that the purity and a dew point of gas in the cylinder reach the required requirements; a sealing method that a sealing needle is in interference fit with a filling mouth hole is adopted, and a knocking method is adopted, so as to perform mechanical sealing on the high-pressure gas in the cylinder; the filling mouth hole is welded by adopting a welding method, so that the welding penetration reaches the requirements. According to the filling, sealing and welding sealing process, the high-performance technical index requirements are guaranteed, the purity of nitrogen in the cylinder is more than 99.98%, and the dew point is lower than -55 DEG C; after welding sealing, air tightness inspection is performed on a filling mouth, air leakage is not permitted, and the welding penetration is not less than 0.5 mm by inspection.

Description

technical field [0001] The invention relates to a gas cylinder production method, in particular to a 60MPa ultra-high pressure gas cylinder filling and sealing process. Background technique [0002] With the development of science and technology, the original indicators of high-pressure gas cylinders cannot meet the requirements of new indicators, and the pressure requirements of high-pressure gas cylinders are getting higher and higher. Ultra-high pressure gas cylinders have become a development trend, and have been gradually developed and applied. However, with the increase in the pressure of gas cylinders, the current production methods of gas cylinders have technical difficulties in the filling, sealing, and welding processes, which cannot meet the requirements of ultra-high pressure gas cylinders. bottle requirements. Contents of the invention [0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a 60MPa ultra-high pressur...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, the original high-pressure gas cylinder index cannot meet the new index requirements, and the pressure requirements of high-pressure gas cylinders are getting higher and higher. Ultra-high pressure gas cylinders have become a development trend, and have been gradually developed and applied. However, with the increase in the pressure of gas cylinders, the current production methods of gas cylinders have technical difficulties in the filling, sealing, and welding processes, which cannot meet the requirements of ultra-high pressure gas cylinders. bottle request

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