Pressure differential control type high-precision check valve equipment and application method

Abstract

Pressure differential control type high-precision check valve equipment comprises an outer cavity thin-walled container wall which is provided with a first water outlet and a second water outlet on one side and a water inlet on the other side. An inner cavity formed by hermetically connecting an inner cavity lower container wall and an inner cavity upper container wall is reserved in a container outer cavity formed in the outer cavity thin-walled container wall. The inner cavity lower container wall is fixedly connected with and communicated with the first water outlet, the inner cavity upper container wall is provided with a water access passage, a triangular frame is fixedly connected to the inner cavity upper container wall, an elastic membrane is fixedly connected with a piston rod, the piston rod penetrates through the inner cavity upper container wall to be hinged to a balance rod, the balance rod is hinged to the triangular frame, the balance rod is provided with a groove corresponding to the second water outlet, and an elastic membrane washer is fixed in the groove. Opening precision of a check valve is improved, and the function of unattended automatic on and off under low water pressure difference is realized.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a pressure difference control type high-precision check valve device and an application method. Background technique [0002] In the design and construction of water delivery channels, in order to improve the efficiency of channel water delivery and prevent or reduce the loss of water from infiltration into the channel bed, it is necessary to implement anti-seepage engineering measures for water delivery channels. The anti-seepage engineering measure of the channel is to lay a geomembrane on the canal bed, and lay a rigid lining on the geomembrane. Because the thickness of the rigid lining is very thin, when the groundwater level of the canal slope is 10-15cm higher than the water level in the canal, the water pressure will lift the lining plate and destroy it. [0003] The way to solve this problem at present is to adopt drainage and decompression measures...

AI Technical Summary

Problems solved by technology

Existing check valve at present, Chinese patent application CN85107804 discloses a kind of controllable check valve, bottom valve, and it is to adopt artificial method to control the opening and closing of flashboard, can not realize the function of automatic switch; Chinese patent application CN200620006928 .1 A reverse drainage check valve for an anti-seepage channel is disclosed, which uses a spring to seal the drain outlet. The opening pressure of the water head exceeds 50cm, which cannot effectively solve the current problem of slope stability, and the opening of the check valve Insufficient precision

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