Differential pressure adjustable automatic backwashing filter

Abstract

The invention discloses a differential pressure adjustable automatic backwashing filter and relates to a backwashing filter, which aims to solve the problems of the existing backwashing filter of bad filtering effect and easy damage of a filter element or a filter screen owing to manual operation. The backwashing filter comprises a filter element assembly arranged in a valve body and a reversing valve assembly, wherein the filter element assembly is arranged in a filter element cavity which is respectively communicated with a liquid inlet cavity and a liquid outlet cavity of the filter element assembly; the valve body is also provided with a differential pressure sensor, of which one input cavity is communicated with the filter element cavity and the other input cavity is communicated with the liquid outlet cavity; the filter also comprises a main controller which is electrically connected with the differential pressure sensor; one end of the reversing valve assembly is communicated with a control cavity; a hydraulic valve electrical control part communicated with the control cavity is electrically connected with the main controller; the other end of the reversing valve assembly is communicated with a reversing valve liquid inlet cavity; and the side wall of the reversing valve assembly is respectively communicated with the filter element cavity and a liquid return cavity arranged on the valve body.

Description

technical field [0001] The invention relates to a backwashing filter, in particular to an automatic backwashing filter with adjustable pressure difference for a hydraulic support in fully mechanized mining support equipment in coal mines. Background technique [0002] Hydraulic support is one of the main equipment to realize the production automation of fully mechanized mining face. The use of hydraulic support can realize the automatic control of production equipment in fully mechanized mining face, improve the production efficiency of the working face, improve the production conditions of the working face, and achieve the purpose of safe production. [0003] In the hydraulic control system, the pollution of the medium seriously affects the performance of the system and the service life of the components. According to statistics, in all kinds of hydraulic machinery, about 70% of hydraulic system failures are caused by medium pollution. The failure of the electro-hydrauli...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor filtering effect and easy damage to the filter element or filter screen in the existing backwash filter due to manual operation, and to provide a structure Simple, adjustable, automatic control, easy processing, adjustable automatic backwash filter that can provide better filtration protection for the entire hydraulic system, in order to achieve the safety and reliability of the hydraulic support, and improve the life of the hydraulic support hydraulic system

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