Anti-scouring valve sealing structure

Abstract

The invention belongs to the field of valves, and discloses an anti-scouring valve sealing structure which comprises a valve stem (1), a valve spool (2) and a valve body (4). The valve stem (1) is fixedly connected with the valve spool (2). The anti-scouring valve sealing structure is characterized in that a valve spool end cover (2-1) is arranged at the upper end of the valve spool (2), a valve spool cylinder (2-2) is arranged at the lower end of the valve spool (2), the lower surface of the valve spool end cover (2-1) and the upper surface of the valve body (4) are flatly sealed, and a sealing ring (3) is arranged between the lower surface of the valve spool end cover (2-1) and the upper surface of the valve body (4), so that a flexible sealing form can be implemented; a flow channel (4-1) is arranged in the center of the valve body (4) and is clearance fit with the valve spool cylinder (2-2). A blind hole (2-4) is formed in the center of the valve spool cylinder (2-2), drainage ports (2-5) are formed in the outer surface of the valve spool cylinder (2-2), and each drainage port (2-5) is separated from the lower surface of the valve spool end cover (2-1) by a certain distance and is communicated with the blind hole (2-4). The anti-scouring valve sealing structure has the advantages that scouring on the sealing ring can be prevented, the flow rate of liquid can be adjusted, the anti-scouring valve sealing structure is reliable in sealing performance, and a valve is long in service life.

Description

technical field [0001] The invention relates to valves, in particular to an anti-scouring valve sealing structure. Background technique [0002] In the quick release valve, a large amount of high-pressure gas is stored in the gas storage chamber of the valve, and the pressure difference between the gas storage chamber and the outside of the valve is large, and the gas release time is required to be short. Therefore, the sealing performance and anti-scouring performance of the valve are required to be high. If the valve adopts the form of metal hard seal, it can have anti-scouring performance, but it cannot reliably seal the gas, so it cannot meet the requirements; if the valve is sealed in the form of soft seal, it can effectively seal the gas, but the sealing The ring cannot resist erosion, and the sealing ring will be destroyed under the erosion of gas, the valve seal will fail, and the valve will leak. [0003] Application No. 201320125076.8 discloses a valve structure t...

AI Technical Summary

Problems solved by technology

If the valve adopts the form of metal hard seal, it can have anti-scouring performance, but it cannot reliably seal the gas, so it cannot meet the requirements; if the valve is sealed in the form of soft seal, it can effectively seal the gas, but the sealing The ring cannot resist erosion, the sealing ring will be destroyed under the erosion of gas, the valve seal will fail, and the valve will leak

[0003] Application No. 201320125076.8 discloses a valve structure that prevents the sealing surface from being eroded. This structure realizes anti-scouring by designing a protective cover outside the sealing surface of the valve core. However, the protective cover of this structure is difficult to process. Effectively prevent the sealing surface from being scoured, and the metal hard seal is used, which cannot effectively seal the gas

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