Fluid valve

Abstract

The invention discloses a fluid valve which is characterized in that the inner cavity of a valve body is communicated with a dynamic fluid inlet; the side wall of the valve body is provided with at least two dynamic fluid leakage openings in an axial symmetrical mode; two sides of each dynamic fluid leakage opening are respectively provided with a first communicated opening and a second communicated opening; the valve body is provided with a first control signal opening connected with the first communicated opening and a second control signal opening connected with the second communicated opening; a reversing valve core comprises at least two top end seals and a hollow body with the open bottom part; the opening at the bottom part of the hollow body is arranged towards the dynamic fluid leakage opening and is in contact with slidingly with the seal plane of the inner wall of the valve body; the inner space of the hollow body is communicated with the dynamic fluid leakage openings; and the outer space of the hollow body is communicated with the dynamic fluid inlet. The fluid valve provided by the invention has the advantages of simple structure, reliability, low cost, high-pressure resistance, large flow rate, working reliability, long service life and wide scope of application.

Description

technical field [0001] The invention relates to a fluid valve, in particular to a fluid valve for controlling gas or liquid. Background technique [0002] The traditional reciprocating reversing control uses too many trigger mechanisms similar to travel switches. The setting of multiple links is likely to cause reliability problems and complex structures. Usually, a cylindrical valve that moves along the axis to switch the control valve has to increase the structural characteristics of the valve. It is difficult to control the flow of fluid by using double spools or more spools in the same valve body. At the same time, using a cylindrical control valve that moves along the axis to switch, the high and low pressure areas are sealed only by simple valve sealing rings. The ability to withstand high-pressure fluid is poor. In addition, the entire valve uses a large amount of sealing rings. There are at least two sealing rings in any high-low pressure area. In this way, a single ...

AI Technical Summary

Problems solved by technology

[0002] The traditional reciprocating reversing control uses too many trigger mechanisms similar to travel switches. The setting of multiple links is likely to cause reliability problems and complex structures. Usually, a cylindrical valve that moves along the axis to switch the control valve has to increase the structural characteristics of the valve. It is difficult to control the flow of fluid by using double spools or more spools in the same valve body. At the same time, using a cylindrical control valve that moves along the axis to switch, the high and low pressure areas are sealed only by simple valve sealing rings. The ability to withstand high-pressure fluid is poor. In addition, the entire valve uses a large amount of sealing rings. There are at least two sealing rings in any high-low pressure area. In this way, a single valve core must have a series of sealing components. If one of the sealing rings is damaged, it will affect Integral sealing, secondly, the above-mentioned gas or liquid control valve has quite high requirements on the cleanliness of the controlled gas or liquid medium, and even needs to add many series of auxiliary equipment for this purpose, which has high cost, poor sealing performance and directly affects the service life of the product and performance

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