Hydraulic device with buffer function

Abstract

The invention provides a hydraulic device with a buffer function. The hydraulic device comprises a hydraulic cylinder body, a piston and a pressure reducing valve, wherein the piston divides the hydraulic cylinder body into a high-pressure cavity and a return cavity, the pressure reducing valve comprises an input end, an output end and a valve element, the valve element controls on or off of the input end and the output end, the input end is in communication with the return cavity, the control end is in communication with the high-pressure cavity, the output end of an oil tank is in communication with the oil return end of the oil tank, the pressure of the oil cylinder is relieved to a corresponding lower value, and then the oil cylinder is returned, the hydraulic return impact is reduced,a pipeline, a hydraulic element and a measuring instrument are protected. The electric control of the hydraulic system is relatively simple, the number of the hydraulic elements is relatively small,the hydraulic oil leakage points are less, the effect is more ideal, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a hydraulic device with buffer. Background technique [0002] With the progress of society, the application of hydraulic presses is becoming more and more extensive. When the return stroke of the hydraulic press is switched, the oil in the cylinder will have a return impact on the cylinder, which will cause pipeline rupture and damage to hydraulic components and measuring instruments. The corresponding solution is to release the pressure of the oil cylinder to a relatively low value before returning. In the actual control process, the general hydraulic system releases the pressure to this value and then controls the return. There are some defects: The pressure is inconsistent, and sometimes the difference is relatively large. To control these two pressures, the valve parts and electrical control are more complicated, and the production cost is too high; on the hydraulic parts...

AI Technical Summary

Problems solved by technology

When the return stroke of the hydraulic press is switched, the oil in the cylinder will have a return impact on the cylinder, which will cause pipeline rupture and damage to hydraulic components and measuring instruments

The corresponding solution is to release the pressure of the oil cylinder to a relatively low value before returning. In the actual control process, the general hydraulic system releases the pressure to this value and then controls the return. There are some defects: The pressure is inconsistent, and sometimes the difference is relatively large. To control these two pressures, the valve parts and electrical control are more complicated, and the production cost is too high; on the hydraulic parts, it is necessary to add relief valves, hydraulic manifolds, oil inlet and outlet joints, Oil pipes, etc., so that the number of oil leakage points not only increases but also increases the production cost; in terms of electrical control, it is also necessary to increase the adjustable pressure relay signal (or pressure sensor) and corresponding supporting components, and now PLC control is generally used. It is necessary to increase the input points of PLC, and the production cost will increase greatly

This system only weakens the impact of hydraulic shock on the control system, but it does not effectively reduce the hydraulic shock, which has a certain impact on the hydraulic machine.

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