Mute check valve device with blowdown function

Abstract

The invention discloses a mute check valve device with a blowdown function, and relates to the field of valves. The mute check valve device mainly comprises a mute check valve arranged in a valve bodyand a blowdown stop valve arranged at the bottom of the valve body. According to the mute check valve device with the blowdown function, a horn-shaped flow guide body is adopted, so that a flow guiding effect and a diversion effect on a medium is achieved, a vortex of the medium in a valve cavity is prevented from generating, head loss of the mute check valve is reduced, and the effects of energyconservation and environmental protection are achieved; a sealing valve seat adopts a copper ring embedded in the valve body separately, the sealing performance is more reliable compared with directly taking the cross section of the valve body as the sealing surface, the problems that sealing valve seat is prone to corrode, and a plastic spraying epoxy resin falls off are solved, the sealing valve seat is inlaid in a dovetail groove on the valve body through a high-pressure device, the bonding strength is high, and the service life is long; and the blowdown stop valve is additionally arrangedat the bottom of the mute check valve body, accumulated water and impurities in the valve cavity can be discharged out by dismounting the stop valve, secondary pollution of accumulated water is avoided, and meanwhile, maintenance and pressure relief of the mute check valve are facilitated.

Description

technical field [0001] The invention relates to the field of valves, in particular to a silent check valve device with a sewage discharge function. Background technique [0002] Silent check valve refers to the valve that relies on the flow of the medium itself to automatically open and close the disc to prevent the backflow of the medium. It belongs to an automatic valve. media leakage. The traditional silent check valve directly uses the cross section of the valve body as the sealing surface, which usually has problems such as easy corrosion and easy falling off of sprayed epoxy resin, resulting in low bonding strength of the valve body and short service life; in addition, when the silent check valve is in In the non-working state, there will be accumulated water and impurities in the valve cavity, which are difficult to discharge directly, causing secondary pollution to the next work. Therefore, there is an urgent need for a silent check valve with a novel sealing struc...

AI Technical Summary

Problems solved by technology

The traditional silent check valve directly uses the cross section of the valve body as the sealing surface, which usually has problems such as easy corrosion and easy falling off of sprayed epoxy resin, resulting in low bonding strength of the valve body and short service life; in addition, when the silent check valve is in In the non-working state, there will be accumulated water and impurities in the valve cavity, which are difficult to discharge directly, causing secondary pollution to the next work

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