Low-temperature valve property testing device

Abstract

The invention discloses a low-temperature valve property testing device. The low-temperature valve property testing device comprises a Dewar bottle, wherein a low-temperature liquid delivery tube is wound on a valve rod of a low-temperature valve to be tested from top to bottom; the low-temperature liquid delivery tube is divided into two channels before entering a valve inlet; one channel is directly connected with an output pipe opening of an upper sealing flange and returns to a low-pressure air return pipeline of a refrigerator; a stop valve is mounted on an outlet of the pipeline; the other channel is connected with a low-temperature valve inlet, is connected with another output pipe opening of the upper sealing flange via a low-temperature valve outlet, and returns to the low-pressure air return pipeline of the refrigerator through the stop valve; meanwhile, the pipeline is connected with a helium mass spectrometer leak detector via a flange through a stop valve; and low-temperature thermometers are respectively mounted on the valve rod of the valve to be tested, the valve inlet and the valve outlet. The whole low-temperature testing system is operated automatically, the working efficiency is improved, repeatability and accuracy of operation are high, meanwhile, online storage and history viewing of data are realized, and data analysis and operation optimization are facilitated.

Description

[0001] Technical field: [0002] The invention relates to valve testing and performance testing, and mainly relates to a low-temperature valve performance testing device, which can realize automatic monitoring and operation of the whole testing process. [0003] Background technique: [0004] Cryogenic technology is not only closely related to people's contemporary high-quality life, but also inseparable from many cutting-edge scientific research in the world. In the 21st century, China's basic scientific research (such as fusion demonstration reactor DEMO, large-scale high-energy physics accelerators, nuclear magnetic resonance spectrometers, strong magnetic field devices, etc.), power industry (such as large superconducting energy storage power stations, nuclear fusion reactors), national defense technology ( Such as ship propulsion magnets, mine-sweeping magnets, strong pulse energy storage magnets, etc.), there is an urgent need to vigorously develop superconducting technol...

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Problems solved by technology

[0007] The purpose of the present invention is to make up for the defects of the prior art, to provide a low-temperature valve performance testing device, which solves the problem of testing valves in the liquid nitrogen temperature zone in the previous low-temperature valve experiment specifications or standards and occurs in a lower environment. Problems such as internal leakage of the valve

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