Hydraulic one-way valve

Abstract

The invention provides a hydraulic one-way valve, and belongs to the technical field of valves. The hydraulic one-way valve solves problems that the existing one-way valve is unstable in use, and generates vibration and noises. The hydraulic one-way valve comprises a main body with a through hole running inside as well as a valve element and a spring, wherein the valve element and the spring are arranged in the through hole; the inner side wall at the front end of the main body is provided with a ring-shaped sealing surface; the inner side wall at the rear end of the main body is provided with a convex shoulder; the valve element is arranged between the convex shoulder and the sealing surface; the spring is arranged between the convex shoulder and the valve element, and under the action of elastic force of the spring, the valve element can resist against and can form seal with the sealing surface; the inner side wall of the main body can limit the valve element in the radial direction and can enable the valve element to move along the axis of the main body all the time; and a flow-passing channel which is communicated with the front side and the rear side of the valve element when the valve element is separated away from the sealing surface is further arranged inside the main body. The hydraulic one-way valve disclosed by the invention is high in using stability and sensitivity, and capable of lowering vibration and noises.

Description

technical field

[0001] The invention belongs to the technical field of valves, and relates to a valve, in particular to a hydraulic one-way valve. Background technique

[0002] A one-way valve is a valve in which the fluid flowing through the one-way valve can only flow from the inlet to the outlet, and the fluid at the outlet cannot flow back. Because of its anti-backflow characteristics, check valves are used in various hydraulic tools and hydraulic equipment.

[0003] like figure 1 As shown, the structure of the one-way valve generally includes a body with a cylindrical through hole inside, a valve core and a spring both arranged in the body, and the inner walls at both ends of the body have annular sealing surfaces and annular shoulders respectively. The spool is located between the sealing surface and the shoulder, and the spring is located between the spool and the shoulder and can exert force on the spool, so that the spool leans against the sealing surface to form ...

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