Hydraulic tool one-way valve and hydraulic tool

Abstract

The invention belongs to the technical field of hydraulic tools, and particularly relates to a hydraulic tool one-way valve and a hydraulic tool. The one-way valve comprises a valve seat and a valve body which are fixed in a valve hole and a valve core and a spring which are arranged between the valve seat and the valve body, the spring abuts against the valve core and the valve body, and the plane of the upper end of the valve core and the lower end face of the valve seat abut and form a first sealing face under the elasticity of the spring; a plurality of overflowing holes are uniformly distributed in the bottom of the valve body, when the upper end face of the valve core is separated from the lower end face of the valve seat, the overflowing holes are communicated with the through hole,and mediums in the through hole flows out from the overflowing holes. According to the one-way valve, the shape of the valve core is changed, plane sealing is adopted by the part between the valve core and the valve body, the sealing performance of the one-way valve is greatly improved by matching with the reduced sealing contacting face between the valve core and the valve body, and the oppositeposition oil returning of the one-way valve in the working process is prevented.

Description

technical field [0001] The invention belongs to the technical field of hydraulic tools, in particular to a check valve for hydraulic tools and hydraulic tools. Background technique [0002] At present, hydraulic tools, as a power component of a hydraulic system, include various types, among which electro-hydraulic tools generally include motors, oil storage chambers, hydraulic pumps, hydraulic cylinders, switch components, control valves, and hydraulic cylinders are equipped with return springs and When the piston rod and the electric hydraulic tool are working, the motor drives the hydraulic pump to rotate, press the pressure oil in the oil storage chamber into the hydraulic cylinder and push the hydraulic parts to make it in a working state, and suck the oil from the oil bag , and then the pressure oil is formed and then discharged until it is sent to the actuator for work; the core working part of the hydraulic tool is the pump body, and a valve hole is opened inside the ...

AI Technical Summary

Problems solved by technology

[0003] For example, a hydraulic check valve [Application No.: 201420357673.8; Authorized Announcement No.: CN203948362U] proposed in Chinese patent documents, which consists of a ball holder, a steel ball, and a retaining ring. The cross-sectional diameter of the through hole is matched to radially limit the valve core, so that the valve core can always move along the axis of the body. Although the shortage of radial movement of the valve core after leaving the sealing surface is overcome, the It will still be affected by the gravity of the spool itself and the problem of insufficient sealing. After the spool leaves the sealing surface, it will often move radially and lean against the inner wall. The spring pushes the spool to move towards the sealing surface. At this time, the spherical The spool may leak when it is closed, causing the oil in the check valve to flow in reverse, resulting in low work efficiency and greatly reduced reliability

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