Back cleaning filter having filtration units on the outer side of device body

Abstract

The present invention relates to an apparatus for filtering a fluid medium conveyed by a pipeline, specifically to a back cleaning filter having filtration units on the outer side of a device body, wherein the back cleaning filter is provided for carrying out filtering and back cleaning on impurities in a medium. The back cleaning filter mainly comprises a device body and n filtration units, wherein a unit inlet of the filtration unit is connected with an outlet interface of the device body through a connection member, a unit outlet is connected with an inlet interface of the device body through a connection member, the N outlet interfaces are correspondingly communicated with n cavity outlets through pipelines, filtration cores are arranged inside the filtration units, the device body is provided with a sewage discharge device and a sewage collection device, the sewage discharge device is provided with sewage suction ports, the device body is provided with a sewage discharge pipeline, the sewage discharge pipeline is communicated with the sewage discharge device and the sewage suction port through the sewage collection device, and a driving device is arranged on the outer side of the device body, and acts to drive the sewage discharge device, such that the sewage suction ports are individually aligned to the N cavity outlets. With the present invention, problems of trouble maintenance, more control elements, complex control, high failure, high maintenance rate and even incapable use in high temperature and high pressure environments, and the like of the back cleaning filter are solved.

Description

technical field [0001] The invention relates to a device for filtering fluid medium transported by pipelines, in particular to a backwash filter with a filter unit outside the body, which can filter impurities in the fluid medium under various usage environments and can be backwashed. Background technique [0002] Existing anti-cleaning filters have filter elements in the body, for example: Chinese patent application (application number 200620091540.6 and application number 200910012515.2); there are also filter elements in the filter unit and the filter unit is outside the body, for example: Chinese patent application ( Application No. 200880002878.1 and Application No. 200810144808.1). Similar to several forms of backcleaning filters of the patent application (application number 200620091540.6 and application number 200910012515.2), the filter element in its body is generally a disc type, metal winding type, woven net type, etc., which can be backwashed. The filter elemen...

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, the present invention provides a backwashing filter device with a filter unit outside the body, which solves the troublesome problem of backwashing filter maintenance and at the same time sol

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