Hydraulic system with buffer function

Abstract

The invention relates to a hydraulic system with a buffer function. The hydraulic system comprises a buffer cylinder, a piston rod and a cartridge valve system, wherein the piston rod is arranged in the buffer cylinder; the buffer cylinder is connected with an oil port of the cartridge valve system through an oil pipe; a control oil path between the buffer cylinder and the cartridge valve system is provided with a reversing valve and a one-way throttle valve; the reversing valve and the one-way throttle valve are connected in parallel. Since the hydraulic system with the buffer function is provided with the reversing valve and the one-way throttle valve, the reversing valve and the one-way throttle valve can achieve the purpose of buffer by controlling the throughput of hydraulic oil in the buffer cylinder; the hydraulic system with the buffer function has the advantages of simple structure, convenience in operation, flexibility in adjustment, safety, reliability and reduced cost and has good business prospect.

Description

technical field [0001] The invention relates to the field of hydraulic systems, in particular to a hydraulic system with a buffer function for a fast gate hydraulic hoist. Background technique [0002] The buffer structure of the existing fast gate hydraulic hoist is a mechanical buffer structure, which is composed of a buffer sleeve, a buffer ring, and a throttling orifice plate. However, this buffer form has the following disadvantages: first, the buffer sleeve is thin Wall-shaped parts, and the length is long, difficult to process, and easy to deform; second, there is a transition fit between the buffer sleeve and the buffer ring. Because of the deformation of the buffer sleeve, it is easy for the buffer sleeve to enter the buffer ring when the cylinder is running. It is stuck, so that the running time of the oil cylinder is too long; third, the throttle orifice is installed on the lower end cover of the oil cylinder, and the buffer function of the throttle orifice cannot...

AI Technical Summary

Problems solved by technology

[0002] The buffer structure of the existing fast gate hydraulic hoist is a mechanical buffer structure, which is composed of a buffer sleeve, a buffer ring, and a throttling orifice plate. However, this buffer form has the following disadvantages: first, the buffer sleeve is thin Wall-shaped parts, and the length is long, difficult to process, and easy to deform; second, there is a transition fit between the buffer sleeve and the buffer ring. Because of the deformation of the buffer sleeve, it is easy for the buffer sleeve to enter the buffer ring when the cylinder is running. It is stuck, so that the running time of the oil cylinder is too long; third, the throttle orifice is installed on the lower end cover of the oil cylinder, and the buffer function of the throttle orifice cannot be tested during the test of the oil cylinder, and it can only be assembled on site. After the oil cylinder is installed in place, it is more difficult to replace the throttle orifice

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