Diaphragm valve

Abstract

The invention provides a diaphragm valve, and belongs to the technical field of sewer systems. The diaphragm valve comprises a drain pipe. A fish type diaphragm is arranged in a cavity of the drain pipe, the left side length of the fish type diaphragm is larger than the right side length of the fish type diaphragm, an upper diaphragm body and a lower diaphragm body in the middle of the fish type diaphragm are in seal fit in a switching-off state, one end of a long pipeline of the fish type diaphragm communicates with a sewer device, one end of a short pipeline of the fish type diaphragm communicates with a negative pressure station, a vacuum drainage connector is cooperatively arranged on the short pipeline of the fish type diaphragm, a seal outer cavity of the fish type diaphragm is formed by the fish type diaphragm and the pipe wall of the drain pipe, and the seal outer cavity of the fish type diaphragm communicates with a connecting channel through a first channel of the drain pipe.The diaphragm valve is driven by negative pressure, it can be guaranteed that sewage is completely drained, small pipeline sewage drainage is used, and the diaphragm valve is small in occupied space,attractive in appearance, high in flux, convenient to switch, good in sealing performance and suitable for remote drainage of a toilet.

Description

technical field [0001] The invention belongs to the technical field of sewage systems, and in particular relates to a sandwich valve. Background technique [0002] In existing residential quarters, the drainage of toilets, kitchens, etc. is directly discharged to the gravity pipe. If a drainage point needs to be transformed in a place far away from the gravity pipe, the sewage from the drainage pipe to the gravity pipe is generally realized by a lifting pump, but the general pump body type It is relatively large, the large pump body has high cost and high noise, and the small pump body has poor passability and is easy to block. SUMMARY OF THE INVENTION [0003] In view of the above problems existing in the prior art, the purpose of the present invention is to design and provide a technical solution for a membrane valve, which adopts negative pressure drive, can ensure complete sewage discharge, uses small pipes for sewage discharge, occupies small space, and has a beautifu...

AI Technical Summary

Problems solved by technology

[0002] In the existing residential quarters, the drainage of toilets, kitchens, etc. is directly discharged to the gravity pipe. If a drainage point needs to be rebuilt at a place far away from the gravity pipe, the sewage discharge from the drain pipe to the gravity pipe is generally realized by a lift pump, but the general type of pump is Relatively large, the large pump body has high cost and high noise, while the small pump body has poor passability and is easy to block

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