Self-sealing filling valve capable of automatically unlocking at low temperature

Abstract

The invention discloses a self-sealing filling valve capable of automatically unlocking at a low temperature, which belongs to the field of low temperature technology. The filling valve comprises a socket assembly, an air inlet pipeline, an on-off cover, a sealing ring, cylinders, a supporting ring, a connecting cover and a plug assembly. The filling valve employs a plugging-pulling type structure. One end of the plug assembly extends into the socket so that the filling valve is on. A long cylinder of the on-off cover is sleeved on the socket assembly. Three cylinders are distributed around the outside of the socket assembly uniformly. A sealing ring is arranged between the left end cover of the cylinder and a circular flange disc of the on-off cover. The three are connected through bolts. The right ends of the piston rods of the three cylinders are connected with the supporting ring through screw threads. The supporting ring is located on the left side of a plug, and the connecting sleeve is sleeved on the plug assembly and the middle part of the connecting sleeve is a circular disc. The filling valve is a low temperature liquid filling valve which is light in weight, flexible toopen, convenient to operate and high in reliability. The valve is capable of solving a problem so that an aircraft is automatically separated from the filling pipeline after being filled with low temperature liquid on the ground.

Description

technical field [0001] The invention relates to a self-sealing filling valve which is automatically unlocked at low temperature and belongs to the field of low temperature technology. Background technique [0002] Cryogenic liquids such as liquid nitrogen and liquid oxygen are used more and more widely in various fields, especially in the aerospace field, liquid oxygen and liquid hydrogen are required as rocket propellant fuels, and in the military field, cryogenic liquids are often used for various A pilot study. For example, a low-temperature cold shield interlayer is installed outside the aircraft, and the phase change refrigeration method of low-temperature liquid is used to reduce the surface temperature of the cold shield to achieve infrared stealth. Since the cryogenic fluid is in a supersaturated state at ambient temperature, there will be serious two-phase flow problems and system pressure surges during the filling process. Therefore, the research can effectively c...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-sealing filling valve that is automatically unlocked at low temperature. The filling valve is a low-temperature liquid filling valve that is light in weight, flexible to open, easy to operate, and high in reliability, and can solve the problem of refueling the aircraft on the ground. After injection of low-temperature liquid and the problem of automatic detachment of the filling pipeline

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