Anti-backflow four-way low-temperature valve capable of conveniently and accurately controlling flow

Abstract

The invention relates to the technical field of low-temperature valves, in particular to an anti-backflow four-way low-temperature valve convenient for accurately controlling flow, which comprises a valve body, a valve core and a rotary adjusting rod. The vertical position and the rotating angle of the valve element in the valve body can be controlled through the first rotating disc and the second rotating disc, so that the supply states of two different kinds of liquid can be controlled through nine stations, and meanwhile further accurate flow control can be achieved in combination with a micro-control drainage device. In addition, the phenomenon that liquid in a downstream pipeline flows back due to working condition changes can be prevented through the anti-reverse inflow device, and the control relation which can be achieved through four times of independent operation of four low-temperature valves originally can be achieved through the single low-temperature valve device. Therefore, the operation difficulty and the occupied space are reduced, meanwhile, the burden of pipeline heat preservation operation is relieved, and the production and use requirements can be better met.

Description

technical field [0001] The invention relates to the technical field of cryogenic valves, in particular to an anti-reverse flow four-way cryogenic valve that facilitates accurate flow control. Background technique [0002] Cryogenic valve is a valve used in low-temperature fluid medium conveying equipment. Since the required conveying medium is generally below minus 40 degrees, additional insulation measures need to be added to the conveying equipment and cryogenic valve, otherwise the external temperature conditions will easily change. There is a risk that the pressure of the internal fluid medium on the equipment is too high, and the risk of reverse flow of the fluid medium when the temperature of the downstream pipeline is heated. When two different cryogenic fluid media need to be transported to two independent mixing devices for mixing, the existing method is to use four pipelines and four cryogenic valves to transport them respectively, but this will cause pipelines and...

AI Technical Summary

Problems solved by technology

[0002] Cryogenic valve is a kind of valve applied to low-temperature fluid medium conveying equipment. Since the required conveying medium is generally below minus 40 degrees, additional insulation measures need to be added to the conveying equipment and low-temperature valve, otherwise the external temperature conditions will easily change. The risk of excessive pressure exerted by the internal fluid medium on the equipment, and the risk of reverse flow of the fluid medium when the temperature rises downstream of the delivery pipeline

However, when it is necessary to transport two different low-temperature fluid media to two independent mixing equipment for mixing, the existing method is to use four pipelines and four low-temperature valves to transport them separately, but this will cause pipelines and low-temperature The valve takes up a lot of space, and the heat preservation of the pipeline system is difficult. It is necessary to operate four cryogenic valves located in different positions. Various operational preparation procedures are complicated during the operation process, and the existing cryogenic valves also lack the design of anti-backflow and precise flow control

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