Special tool for testing ultra-low temperature valve and detection method of special tool

Abstract

The invention discloses a special tool for testing an ultra-low temperature valve. The special tool for testing the ultra-low temperature valve comprises a frame structure, wherein a front sealing disc and a rear sealing disc are separately mounted on the opposite sides of the frame structure, and are close to each other or away from each other to tighten the ultra-low temperature valve; each of the front sealing disc and the rear sealing disc is provided with sealing rings in multiple specifications, through holes are formed in the centers of the front sealing disc and a main plate along theaxial direction, and the temperature sensor penetrates through sealing buckles in the through holes and partially extends into the ultra-low temperature valve; the front sealing disc is provided withan air inlet connecting port along the radial direction, and the air inlet connecting port communicates with the through holes; and a detection connecting port is formed in the rear sealing disk alongthe radial direction, and the other end of the detection connecting port communicates with the interior of the ultra-low temperature valve. The special tool for testing the ultra-low temperature valve, provided by the invention, can clamp rapidly, and facilitates testing.

Description

technical field [0001] The invention relates to a testing device for ultra-low temperature valves, in particular to a special tooling for ultra-low temperature valve testing. Background technique [0002] As an efficient and storable clean energy, LNG has shown broad development prospects in all links of the industrial chain. Domestic natural gas liquefaction plants are mainly small-scale, and the maximum processing scale has reached a liquefaction capacity of 1.2 million tons per year. The reserve scale of domestic LNG receiving stations is also continuously expanding. So far, CNOOC has put into operation 6 LNG receiving stations, with an annual receiving capacity of more than 24 million tons of LNG per year. [0003] During the rapid development of the LNG industry, the demand for cryogenic valves matching it is increasing day by day. Therefore, low temperature testing of ultra-low temperature valves is particularly important. The low-temperature valve test procedure is...

AI Technical Summary

Problems solved by technology

The low-temperature valve test procedure is to seal both ends of the valve and soak it in a liquid nitrogen pool. When the required temperature is reached, the ultra-low temperature valve seal test is performed. The traditional low-temperature test tool (such as the patented ultra-low temperature valve temperature detection test device with application number 201420871061.0 ) The installation is complicated and the speed is slow, which can no longer meet the market demand

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