Mute check valve with pollution discharge function

Abstract

The invention discloses a mute check valve with a pollution discharging function. The mute check valve comprises a valve body, a flow guide body and a valve clack assembly, the flow guide body is detachably arranged in the valve body, the valve body comprises an installation part, the flow guide body is detachably arranged on the installation part through a matching part, the flow guide body is convenient to disassemble, assemble and replace, installation is easy and convenient, the valve clack assembly comprises a valve clack, a valve rod arranged on the valve clack and a reset spring arranged on the valve rod in a sleeving mode, a valve rod hole matched with the valve rod is formed in the flow guide body, the valve clack assembly and the flow guide body are connected through the reset spring, a pressure relief hole is formed in the end wall of one side, close to the valve clack, of the flow guide body, the pressure relief hole is used for balancing pressure inside and outside the flow guide body, preventing waste of fluid energy and saving energy, a slag discharging hole is formed in one side, close to the matching part, of the flow guide body, impurities are discharged from the slag discharging hole in the flowing process of fluid, valve rod blocking caused by accumulation is prevented, the structure is simple, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a silent check valve with a sewage discharge function. Background technique [0002] The check valve is a basic component of fluid control engineering. It can protect the safety of other fluid machinery and pipelines by preventing fluid backflow. During the use of the existing silent check valve, the shaft sleeve and the valve stem are in a clearance fit, and impurities such as garbage and welding slag in the pipeline fluid will adhere to the valve stem after being deposited. Over time, the attachment will hinder the valve stem. The relative movement between the rod and the bushing leads to the jamming of the valve disc and the valve rod, resulting in motion failure, affecting the use, and high after-sales maintenance costs; [0003] In the Chinese invention patent CN102478119A, a silent check valve is proposed. Multiple grooves are arranged on the bearing, and then the impuritie...

AI Technical Summary

Problems solved by technology

During the use of the existing silent check valve, the shaft sleeve and the valve stem are in a clearance fit, and impurities such as garbage and welding slag in the pipeline fluid will adhere to the valve stem after being deposited. Over time, the attachment will hinder the valve stem. The relative movement between the rod and the bushing leads to the jamming of the valve disc and the valve rod, resulting in motion failure, affecting the use, and high after-sales maintenance costs;

[0003] In the Chinese invention patent CN102478119A, a silent check valve is proposed. Multiple grooves are arranged on the bearing, and then the impurities in the fluid are removed through the relative movement of the valve stem and the bearing. In this way, the grooves of the bearing are easy to block, and frequent Clean the bearings;

[0004] Chinese utility model patent CN210716254U proposes a silent check valve, which realizes the discharge of accumulated water and impurities in the valve body by setting a sewage stop valve at the bottom of the valve body. The structure is relatively complicated, which increases the manufacturing cost and the economic benefit is not good.

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