Self-locking check valve

Abstract

The invention relates to a self-locked check valve. The self-locked check valve comprises an outer shell body (1), a valve body (12), an air-in cavity (18), an air-out cavity (19) and an elastic piece (2), wherein the valve body (12) is provided with an opening (6), a valve cavity (17) and a valve cavity air inlet (27), a plug (13) matched with the opening (6) is arranged on the opening (6), an adjusting screw rod (16) is arranged in the valve cavity (17) and fixed to the plug (13), the adjusting screw rod (16) penetrates out of the valve cavity air inlet (27) and then is provided with an adjusting screw head (21), the adjusting screw rod (16) penetrates through the elastic piece (2), and the elastic piece (2) abuts against the valve body (12) and the adjusting screw head (21). Through structure and material improvement, the problems that after gas is injected, water returns to a treated water source, and an existing check valve is prone to corrosion can be effectively solved, and the valve body is good in sealing performance, low in machining difficulty and high in air-in and air-out rate.

Description

technical field [0001] The invention relates to a self-locking one-way valve used in the ozone industry to control backwater in a gas path, and belongs to the technical field of ozone application. Background technique [0002] At present, the one-way valves used in the ozone industry to control the return water of the gas path are borrowed from other industries. There is no special one-way valve in this industry. The traditional one-way valve is equipped with a valve plate in the valve cavity. When the gas passes through the intake air When the port enters the valve cavity and reaches the valve plate, the valve plate opens, the gas enters the gas outlet, and then enters the dosing device to complete the gas dosing. After the gas dosing is completed, when the water pump stops, rely on the backwater pressure of the treated water source to push the valve back to reset. If the recovery is not in place, the interception effect will not be achieved, and more water will flow back ...

AI Technical Summary

Problems solved by technology

After the gas dosing is completed, when the water pump stops, rely on the backwater pressure of the treated water source to push the valve back to reset. When the backwater pressure of the treated water source is high, the valve can be pushed back to its position quickly. If the recovery is not in place, the interception effect will not be achieved, and more water will flow back into the one-way valve

Once the water flows back into the high-voltage discharge tube of the ozone equipment through the one-way valve, it will cause damage to the high-voltage discharge tube, resulting in the failure of the entire ozone equipment to operate normally.

[0003] Ozone is corrosive. Currently, the one-way valve materials used in the ozone industry, regardless of the cavity or the seal (for example, the valve body mentioned above is mostly copper or aluminum metal parts, these materials are easily corroded and rusted in ozone and humid environments. , resulting in poor sealing performance of seals such as the valves mentioned in this article, and they are easily stuck due to the insensitivity of moving parts during reset. Leakage or even valve body breakage, resulting in unnecessary economic losses and waste

[0004] The Chinese patent application with the publication number CN102352931A relates to an ozone one-way valve. The seal is realized by connecting the sealing ball with a spring to the joint of the seal. It is difficult to process the ball. The air inlet and outlet passages of the check valve are narrow, the air intake is small, and the air pressure increases slowly, which limits the gas outflow rate. The stopper acts as a stopper, and the structural design of the one-way valve is relatively complicated, which makes the processing of the one-way valve difficult

The patent application with the publication number CN104874099A proposes a one-way valve sealing body design that is too complicated and there is a spring between the housing and the valve cavity, which is not completely sealed, and the sealing area between the sealing member and the valve body is small, which may cause gas backflow

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