Non-return stop valve

Abstract

The invention relates to a non-return stop valve. The non-return stop valve comprises a water inlet pipe, a water outlet pipe, a bottom vertical pipe and an upper vertical pipe, wherein the bottom vertical pipe is connected with the tail end of the water inlet pipe, the upper vertical pipe is connected with a water outlet pipe and the bottom vertical pipe, and a step connected with the pipe wall of the bottom vertical pipe is arranged at the tail end of the water outlet pipe; an opening in the upper end of the bottom vertical pipe is an oblique hole and is close to and higher than the water outlet pipe side, a baffle piece is arranged at the upper end of the bottom vertical pipe, one end of the baffle piece is hinged to the pipe wall of the upper vertical pipe, and the other end of the baffle piece is located in the step when the baffle falls to the lowest point; a tension spring is arranged on the baffle piece, one end of the tension spring is fixed on the baffle piece, and the otherend of the tension spring is fixed on the pipe wall of a vertical pipe. According to the non-return stop valve, the backflow of fluid can be prevented, the starting and stopping of forward flow of thefluid can be controlled according to the actual demands, the non-return effect is good, and the phenomenon that a small amount of fluid flows back is avoided. The non-return stop valve is simple in structure, strong in practicability and suitable for being popularized and used.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to a check stop valve. Background technique [0002] 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, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is a kind of automatic valve, its main function is to prevent the reverse flow of the medium, the reverse rotation of the pump and the drive motor, and the discharge of the container medium. In daily production, there are more and more types of check valves, which are widely used in various fields. However, the check valves that are commonly used now generally only play a role in preventing the medium from flowing backward, but cannot control it to block the forward flow of the fluid. In actual production, in order to facilitate the control and maintenance of the pipeline an...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the traditional check valve has a single function and cannot be manually controlled to block the forward flow of fluid, the present invention provides a check valve, which can not only prevent the fluid from flowing backward, but also control the opening and closing of the forward flow of fluid according to actual needs. stop, and the check effect of this check valve is good, and there will be no phenomenon of a small amount of fluid backflow

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