Novel one-way valve buffer structure

Abstract

The invention discloses a novel one-way valve buffer structure, and belongs to the technical field of hydraulic valves. The lower end of a valve element hole of a valve body is an oil port P, and the upper end of the valve body valve element hole is a spring cavity; a screw plug is arranged at the end of the spring cavity, a valve element is arranged in the spring cavity in a sliding mode, and a spring is arranged between the valve element and the screw plug; the lower end of the valve element abuts against the inner wall of the valve element hole of the valve body in a matched mode; an axial conical oil channel is formed in the circumferential face of the lower end of the valve element, the sectional area of the conical oil channel is gradually reduced from top to bottom, and the upper portion of the conical oil channel communicates with the spring cavity through an oil through hole; an oil port A is formed in one side of the valve body and communicates with the valve element hole of the valve body, and the conical oil channel is opposite to the oil port A in the radial direction of the valve element hole of the valve body. An oil way is simple and compact in structure, easy to machine and operate and high in practicability, the impact force of opening of the one-way valve on the screw plug is reduced, the risk of oil leakage at the screw plug is eradicated, and the response speed of the one-way valve is not affected.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a novel one-way valve buffer structure. Background technique [0002] With the rapid development of construction machinery, higher requirements have been put forward for the reliability, safety, and environmental protection of construction machinery; the oil leakage during the use of the excavator has caused a certain degree of pollution to the environment, and at the same time , resulting in waste of oil and a certain degree of economic loss; especially in the external leakage problem, the external leakage of oil caused by the damage of the plug seal caused by hydraulic shock is the most serious. [0003] Chinese patent discloses a one-way throttle valve (CN104315204A), including a one-way channel and a throttle channel, the one-way channel flows from valve port A to valve port B, and the one-way channel passes through the throttle groove 1. Radial hole and axial hole;...

AI Technical Summary

Problems solved by technology

[0005] There is no cushioning structure. When the valve core is opened, the operation process of the valve core is accelerated until it stops suddenly (at this time, the valve core touches the base or screw plug at the rear end), and the screw plug receives a large impact, which is prone to leakage ;

[0006] In addition, the working hydraulic oil flows through the throttling groove, the flow rate is small, and the application range is limited

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