Valve with improved backflow resistance

Abstract

The invention discloses a valve with improved backflow resistance. The valve with improved backflow resistance comprises a valve body, a spring seat, a spring, a one-way valve body, a valve plug, a valve plug base, a fluid inlet, a fluid outlet, a closure rod, a valve plug base air hole and a first-layer sealing ring. The valve body comprises a cylindrical channel and the one-way valve body. The one-way valve body is a cylindrical chamber. One end of the cylindrical channel is in seamless connection with one end of the cylindrical chamber. The spring seat is arranged at the other end, not connected with the cylindrical channel, of the cylindrical chamber. The fluid inlet is arranged outside the spring seat. The spring seat is hollow in the middle and communicates with the fluid inlet. Themiddle part of the spring seat is hollow and in the shape of a circular truncated cone. The fluid outlet is formed in the other end, not connected with the cylindrical chamber, of the cylindrical channel. According to the valve with improved backflow resistance, because the closure rod and the spring are used instead of the hydraulic system used in the traditional technology, not only is the costreduced, but also the requirement on the accuracy of the valve body is reduced; and the requirements on the conditions for using a one-way valve are reduced, and therefore the one-way valve is applicable to more fields.

Description

technical field [0001] The present invention relates to a valve, in particular to a valve with improved anti-backflow performance. Background technique [0002] The one-way valve is that the fluid can only flow along the water inlet, but the outlet medium cannot flow back, commonly known as a one-way valve. One-way valve is also called check valve or check valve. Used in hydraulic systems to prevent reverse flow of oil flow, or used in pneumatic systems to prevent reverse flow of compressed air. There are two types of check valves, straight-through and right-angle. The straight-through check valve is installed on the pipeline with a threaded connection. There are three types of right-angle check valves: threaded connection, plate connection and flange connection. [0003] One-way valve is also called check valve or check valve. Used in hydraulic systems to prevent reverse flow of oil flow, or used in pneumatic systems to prevent reverse flow of compressed air. There ar...

AI Technical Summary

Problems solved by technology

[0004] The check valve in the prior art usually adopts a hydraulic method when the spring is compressed, but the hydraulic method requires high precision and high requirements, and has high requirements on the valve body, resulting in high cost and difficult maintenance

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