Hydraulic system for supplying work medium with different filter fineness to different elements of hydraulic support

Abstract

The invention relates to a hydraulic system for supplying working medium with different filtering precision to different components of a hydraulic support; the working medium of a main valve, an auxiliary valve, a jack and an upright post which have low requirement to the filtering precision adopts low filtering precision to be filtered and large-diameter pipelines are used for feeding liquid; the working medium of a pilot valve which has high requirement to the filtering precision adopts high filtering precision to be filtered and independent pipelines are used for feeding liquid. The hydraulic system essentially comprises a special feeding pipeline for feeding the liquid to the pilot valve and a high-pressure feeding pipeline for feeding high-pressure working medium to all the hydraulic components except the pilot valve; the special feeding pipeline of the pilot valve comprises a special filtering station / a filter which is arranged on the pipeline in sequence and has high filtering precision; the high-pressure feeding pipeline comprises the filtering station / the filter which is arranged on the pipeline in sequence and has low filtering precision; the filtering area of each filtering part of the special feeding pipeline of the pilot valve is larger than that of the filter of the pilot valve in the prior art; as the flow is small, the filtering part is not easy to be blocked.

Description

technical field [0001] The invention relates to a mine roof support technology, in particular to a hydraulic system in which a pilot valve and other hydraulic components respectively supply working media with different filtering precisions for different elements of the hydraulic support. Background technique [0002] At present, the liquid supply system commonly used in hydraulic supports adopts the same power source pump station, which can be supplied by multiple pumps in parallel to form a 2-way or even 3-way liquid supply system, but it is not independent for the electromagnetic pilot valve of the electro-hydraulic control system. , Special pipeline for liquid supply. [0003] The existing hydraulic support liquid supply system such as figure 1 As shown in the figure, each support is represented by 4-function pilot valve and main valve, the whole working face is represented by 2 supports, and the pump station train is represented by a single pump. It can be seen from th...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the disadvantages of high cost and easy blockage of the hydraulic system of the existing hydraulic support, the purpose of the present invention is to provide a hydraulic system that supplies working media with different filtration precision for different components of the hydraulic support, and the main valve, auxiliary valve and auxiliary valve that do not require high filtration precision. The working medium of the valve, jack, and column is filtered with low filtration precision, and the liquid is supplied by a large-diameter pipeline; while the working medium of the pilot valve that requires high filtration precision is filtered with a high filtration precision, and the liquid is supplied by an independent pipeline

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