Single-piece check valve

Abstract

The invention relates to a single-piece check valve. The check valve comprises a valve body, a valve plate, a valve plate O-shaped sealing ring, a pressing piece, a valve body O-shaped sealing rings,a spring and a lifting ring. The lifting ring is arranged outside the valve body; a cavity for placing the valve plate is formed in the valve body; the valve plate O-shaped sealing ring is arranged between the valve plate and the valve body; the valve plate is connected with an articulated shaft, the articulated shaft is fixedly arranged in the valve body, the valve plate can be opened and closedup and down, the pressing piece is fixedly arranged on the valve body, one end of the spring is connected to the articulated shaft, the other end of the spring is fixedly arranged on the valve plate,and the front surface and the rear surface of the valve body are each provided with a valve body O-shaped sealing ring. The check valve is simple in structure, large in flow, small in resistance, small in opening pressure difference, resistant to corrosion and abrasion, good in sealing performance, long in service life and capable of preventing blockage.

Description

technical field [0001] The invention relates to a valve, in particular to a single-chip check 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. [0003] Check valve: According to the structure, it can be divided into three types: lift check valve, swing check valve and butterfly check valve. Lift check valves can be divided into two types: vertical and straight-through. Swing check valves are divided into three types: single flap, double flap and multi flap. Butterfly check valves include butterfly double discs and butterfly single discs. The...

AI Technical Summary

Problems solved by technology

Although the effect of the check valve body is good, the structure is relatively complicated and the structural strength is low. Therefore, a check valve with good check effect, high structural strength and simple structure is needed on the market.

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