Two-position three-way reversing valve and reversing method used for small-flow liquid nitrogen low-temperature system

Abstract

The invention provides a two-position three-way reversing valve and a reversing method used for a small-flow liquid nitrogen low-temperature system. The reserving valve is a single electrical-controllever corrugated tube valve driven by an electromagnet, and comprises a valve body structure, a corrugated tube sealing structure, a lever hinge reinforcing structure and an electromagnet power generation structure, wherein the valve body structure comprises a valve seat, a double-conical-surface movable valve rod, an upper conical surface sealing base, a lower conical surface sealing base and a movable valve element connecting rod; the corrugated tube sealing structure comprises a corrugated tube and an elastic connector; and the lever hinge reinforcing structure comprises a first conductingpiston, a reinforcing connecting rod and a second conducting piston. The two-position three-way reversing valve has the advantages that the two-position three-way reversing valve is suitable for beingused under an ultra-low temperature environment, and is especially suitable for being used under a small-flow low-temperature environment. The cut-off valve principle is utilized for switching to thedouble-conical-surface movable valve rod for sealing and opening the upper conical surface sealing base and the lower conical surface sealing base so as to realize reversing of ultra-low-temperaturefluid. The two-position three-way reversing valve for the small-flow liquid nitrogen low-temperature system has the characteristics of a small size, a little cold loss, small leakage amount and quickresponse.

Description

technical field [0001] The invention relates to a reversing valve, in particular to a two-position, three-way reversing valve and a reversing method for a low-flow liquid nitrogen cryogenic system. Background technique [0002] At present, the market is full of valves of many varieties and specifications, such as hydraulic valves, pneumatic valves, vacuum valves and chemical valves, etc. It meets people's needs for use in ultra-low temperature environments, for example, it cannot be used in cryoablation minimally invasive surgery systems. Contents of the invention [0003] Aiming at the defects in the prior art, the present invention provides a two-position three-way reversing valve and a reversing method for a low-flow liquid nitrogen cryogenic system, which can effectively solve the above problems. [0004] The technical scheme that the present invention adopts is as follows: [0005] The invention provides a two-position three-way reversing valve used in a low-flow li...

AI Technical Summary

Problems solved by technology

[0002] At present, the market is full of valves of many varieties and specifications, such as hydraulic valves, pneumatic valves, vacuum valves and chemical valves, etc. Meet people's needs for use in ultra-low temperature environments, for example, cannot be used in cryoablation minimally invasive surgery systems

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