Pipeline flexible check valve

Abstract

The invention relates to a pipeline flexible check valve, comprising a valve cylinder and a flexible valve core which is axially arranged in the valve cylinder, the flexible valve core is a conical sleeve flexible part with a closed vertex, the closed vertex of the conical sleeve is deviated from a shaft center of the valve cylinder to be contacted with the inner wall of the valve cylinder, a sleeve end of the conical sleeve is matched with the inner wall of the valve cylinder in a sealing manner; the sleeve end of the conical sleeve can adhere a cylindrical sleeve which is matched with the inner wall of the valve cylinder in the sealing manner or adhere a notch which is matched with the notch of the inner wall of the valve cylinder in the sealing manner; the sleeve wall from the closed vertex of the conical sleeve to the sleeve end of the conical sleeve is adhered with the inner wall of the valve cylinder and tightly locked and connected by a threaded part. The flexible valve core can be directly arranged in an inner cavity of a sewage discharge pipeline, or the flexible valve ore is arranged in the inner cavity of the valve cylinder and then the valve cylinder and the pipeline are connected to a whole structure, thereby having compact installation and no need of external pipeline, saving space, saving installing parts, tightly connecting the pipeline and being difficult to leak; and the flexible valve core can effectively prevent the back-flow of waste water or waste gas, thereby having strong practicality and wide range of applications.

Description

technical field [0001] The invention relates to a one-way check valve, mainly a pipeline flexible check valve for preventing the backflow of waste water and waste gas, suitable for sewage water outlets, waste gas exhaust outlets, urban drainage pipe networks, water outlets of pump stations, On pipelines such as dam overflow outlets. Background technique [0002] Generally, P-type pipes are used on the sewage pipes of domestic sewage to block the backflow of odor. P-type pipes are installed on the sewage pipes, occupying a lot of space, affecting the floor height and indoor appearance, and there are many connections of P-type pipes, which are prone to leakage. The P-type pipe can only prevent the backflow of odor, but cannot effectively prevent the backflow of waste water. The waste water will flow back into the room through the sewage pipe, affecting daily life. [0003] In addition, the traditional pipe network only plays the role of drainage. When the urban rainfall is he...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings in the prior art that need to be installed separately on the drainage or exhaust pipe, occupy a large space, be inconvenient to install and maintain, and have high cost of use, the purpose of the present invention is to provide a simple structure that can be directly installed on the drainage or exhaust pipe. On the exhaust pipe, there is no need for external pipes, easy installation and maintenance, low cost of use, and a pipe flexible check valve with good effects on normal waste discharge, waste gas and waste water backflow

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