Automatic backwash filter with rated flow of 900L/min

Abstract

The invention provides an automatic backwash filter with rated flow of 900L / min. The automatic backwash filter comprises a valve body, main valve element components, a liquid return check valve, filter element components and an electromagnetic pilot operated valve, wherein left and right working chambers and left and right valve element chambers are formed in the valve body; a liquid inlet is drilled in the upper side of the valve body; a liquid outlet is drilled in the lower side of the valve body; a drain outlet is drilled in the left and right sides of the valve body respectively; the left and right working chambers, the left and right valve element chambers, the liquid inlet, the liquid outlet and the drain outlets are communicated; the main valve element components, the filter element components and the liquid return check valve are installed in the valve body; pistons, valve elements, valve seats, valve sleeves, spring seats, springs and plugs are connected by threads to form the main valve element components; as whole connector clips, the main valve element components are installed in the working chambers; the filter element components are formed by connecting filter screens and connectors together by middle threads; as whole connector clips, the filter element components are installed in the filter element chambers of the valve body and are connected and fixed by U pins; the electromagnetic pilot operated valve is fixed together with the valve body by adopting fastening screws. The automatic backwash filter is completely applicable to electro-hydraulically controlled hydraulic supports of fully mechanized coal mining faces of coal mines.

Description

technical field [0001] The invention relates to a filter, in particular to an automatic backwashing filter with a rated flow rate of 900L / min, which is used for electro-hydraulic control hydraulic supports in fully mechanized coal mine working faces. Background technique [0002] In the prior art, the structure of the filter is varied, such as "a backwash filter with alarm function" disclosed by the Chinese patent (ZL200920118960.2, date of publication 2010.3.10), which includes a valve body, a valve body There are liquid inlet, liquid outlet, left liquid discharge port and right liquid discharge port on the top. The left filter element assembly and the right filter element assembly are installed in the valve body. The left valve seat, left steel ball, left The right valve seat, right steel ball and right joint are installed in the right valve chamber of the valve body. The upper and lower hollow sealing screws are respectively arranged in the upper and lower chambers of the...

AI Technical Summary

Problems solved by technology

The working medium used in the hydraulic system of the hydraulic support is emulsified oil. Due to the harsh underground conditions of the coal mine, there are inevitably impurities. If these impurities cannot be removed in time, during the normal operation of the system, these impurities will pollute other hydraulic components, resulting in The parts of the hydraulic system are not working properly, out of control, or even damaged

Due to the underground environment and space, after the filter commonly used in the past is clogged, it must be manually backwashed or shut down for cleaning, and it is impossible to determine when it will be clogged. The operating space requirement is relatively large, which seriously affects the production and safety of the coal mine.

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