High Sensitivity Check Valve

Abstract

The invention provides a high-sensitivity one-way valve which comprises a valve seat, a filler neck and a valve core mechanism, wherein the valve core mechanism comprises a valve core, a stop block and a spring; the valve core, the stop block and the spring are sequentially arranged in a cavity I between the valve seat and the filler neck in a linear manner; the stop block is of a ring plate-type structure; four claw-type bulges are uniformly distributed on one surface of the stop block in the circumferential direction and propped against the valve core; a spring positioning groove is formed in another surface of the stop block and propped against one end of the spring; the valve seat comprises a conical cavity and a connector; the inlet of the conical cavity is chamfered, and a valve core seat is arranged at the inlet of the conical cavity; the valve core is propped against the valve core seat; the filler neck comprises a connector part; the connector part comprises a cavity II and a spring seat; the other end of the spring extends into the cavity II and is propped against the spring seat; the outlet of the cavity II of the filler neck is chamfered; a groove is formed in the periphery of the connector part and used for arrangement of a sealing part; a mounting lug boss is arranged at the back of the groove; and the valve seat is in welded connection with the mounting lug boss through an adjusting shim. The high-sensitivity one-way valve provided by the invention has the characteristics of being small in opening pressure difference, low in flow resistance, good in sealing performance, light in weight, and the like.

Description

technical field [0001] The invention relates to a high-sensitivity one-way valve, which belongs to the field of thermal control of spacecraft and is specifically applied to single-phase fluid circuits of small spacecraft such as satellites. Background technique [0002] The single-phase fluid circuit based on mechanical pump has the advantages of simple structure, flexible layout, high robustness and good inheritability. It plays a central role in the thermal control system of spacecraft, but for a long time due to the heavy weight of mechanical pumps, the application of single-phase fluid circuits on small and medium-sized satellite platforms has been limited. In recent years, with the successful development of long-life small mechanical pumps, the application of single-phase fluid circuit technology on small and medium-sized satellite platforms has become possible. [0003] In the single-phase fluid circuit, the main function of the check valve is to prevent the short cir...

AI Technical Summary

Problems solved by technology

The check valves in the prior art cannot meet these requirements at the same time, so it is necessary to develop a check valve suitable for single-phase fluid circuits of small spacecraft such as satellites

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