Helium medium valve sealing performance test device and test method thereof

Abstract

The invention provides a helium medium valve sealing performance test device and a test method thereof. The device comprises a high-pressure helium cylinder and a high-pressure nitrogen cylinder, wherein the outlet ends of the high-pressure helium cylinder and the high-pressure nitrogen cylinder are respectively connected with the inlet ends of a first needle type adjusting valve and a second needle type adjusting valve through pipelines; the outlet end pipelines of the first needle type adjusting valve and the second needle type adjusting valve are converged and then connected with the air inlet end of a clamp; the air outlet end pipeline of the clamp is divided into two branches, wherein one branch is connected with the air inlet end of a detection valve; the air outlet end of the detection valve is connected with a detection port through the pipeline, and the other branch is connected with the air inlet end of a pressure relief valve; the air outlet end of the pressure relief valveis connected with a pressure relief port through the pipeline; and when the sealing performance test is performed, the cleanliness of a helium medium valve is firstly checked, then the air inlet end of the clamp is connected with the outlet end of the high-pressure nitrogen cylinder or the high-pressure helium cylinder through the first needle type adjusting valve and the second needle type adjusting valve, and nitrogen or helium is filled in the helium medium valve to perform pre-detection and internal sealing and external sealing detection. The helium medium valve sealing performance test device has the advantages of being reasonable in structure, convenient to assemble, easy to operate and high in practicality.

Description

technical field [0001] The invention relates to the technical field of valve tightness testing, in particular to a helium medium valve tightness testing device and a testing method thereof. Background technique [0002] The high-temperature gas-cooled reactor uses helium as the cooling medium of the primary circuit. Helium is an inert gas that does not chemically react with any substance. It has good compatibility with the structural materials of the reactor and will not corrode the structural components of the reactor. [0003] Helium has excellent permeability and is used for the cooling of nuclear reactors. It is often used for leak detection of some pipelines and electronic and electrical devices of rockets and nuclear reactors. A large number of helium medium valves are installed in the main system of the high-temperature gas-cooled reactor to undertake the function of helium isolation. The working pressure of the helium medium valve is about 7MPa. Under the operating p...

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Problems solved by technology

[0006] Existing leak test devices are mainly aimed at valves with gas medium or liquid medium. When detecting internal leakage of helium valves, it is necessary to reserve a special detection port downstream of the valve for the detection port of the internal leakage rate index of the valve. The existing tightness test device does not have a special detection port, and it is impossible to carry out internal leakage rate detection of helium medium valves

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