One-way valve

Abstract

The invention belongs to the technical field of fluid control, and particularly relates to a one-way valve. The one-way valve comprises a valve main body, a valve core and a resetting piece, wherein the valve main body is at least provided with an oil inlet hole, a valve core mounting cavity and an oil outlet hole which sequentially communicate with an oil way; the valve core is movably mounted in the valve core mounting cavity; the resetting piece is mounted between the valve core and the valve main body; and the valve core is further provided with a guide base part and a sealing part, the guide base part is installed on the inner wall of the valve core mounting cavity, a flow channel is formed in the guide base part, the sealing part is used for sealing the oil inlet hole, a flow passing gap is formed between the sealing part and the valve core mounting cavity, and a flow passing hole which communicates with the flow passing gap with the flow passing channel is formed in the side wall of the sealing part. According to the one-way calve, the guiding base part is used for guiding and positioning the valve core, the sealing part is used for sealing the oil inlet hole, meanwhile, internal conduction is achieved through the flow passing gap, the flow passing hole and the flow passing channel, the liquid inlet sectional area can be greatly increased, the oil inlet and outlet efficiency can be improved, and meanwhile, the structure has the advantages of being easy to manufacture, low in cost and the like.

Description

technical field [0001] The invention belongs to the technical field of fluid control, in particular to a one-way valve. Background technique [0002] Check valve, also known as check valve or check valve, is mainly used in hydraulic system to prevent reverse flow of oil flow. [0003] At present, the main structure of the check valve includes a valve body, a spring and a steel ball, and the spring abuts the steel ball against the liquid inlet of the valve body. In order to achieve liquid conduction, there is a gap between the steel ball and the inner cavity of the valve. Therefore, after the one-way valve is opened, the steel ball cannot be accurately positioned in the valve body, which makes it impossible for the steel ball to quickly seal the liquid inlet when the valve is closed. , affecting work efficiency. At the same time, this also causes the sealing surface of the steel ball and the liquid inlet to be easily worn, and the service life is not high. [0004] The Chi...

AI Technical Summary

Problems solved by technology

[0005] 1. The sealing surface of the steel ball and the liquid inlet is easily worn and the durability is not high

[0006] 2. Due to the small size of the one-way valve used in hydraulic tools, the manufacturing cost of this structure is relatively high

[0007] 3. The fluid of this type of one-way valve is in the middle and out of the surroundings. When closing the valve, it can only rely on the reset force of the spring, which is prone to problems such as long closing time and poor sealing performance.

[0008] 4. Affected by its own volume and structure, the oil inlet efficiency needs to be improved

Images