Scraping type self-cleaning filter

Abstract

The invention discloses a scraping type self-cleaning filter, comprising a shell, a sewage inlet, a clear water outlet, a filter cylinder, an air cylinder, a gas supply system, a cleaning disc, a slag chamber, a cleaning valve, a pressure differential transducer and an electric controller, wherein the air cylinder is installed on the top of the shell; the cleaning disc is installed in the filter cylinder and tightly contacted with the inner wall of the filter cylinder; the middle part of the cleaning disc is connected with a piston rod of the air cylinder; the cleaning disc is provided with water-passing pores which are communicated up and down; the slag chamber is disposed below the filter cylinder; the cleaning valve is disposed between the slag chamber and the filter cylinder; the pressure differential transducer is disposed on the inner and outer sides of the filter cylinder; the pressure differential transducer, a control signal input terminal of the air cylinder and the cleaning valve are corresponding connected with signal terminals of the electric controller respectively; and the gas input end of the air cylinder is connected with the gas output end of the gas supply system. When the filter cylinder is obstructed, the pressure differential transducer can detect the pressure differential signals on the inner and outer sides of the filter cylinder; and the electric controller controls the air cylinder and the cleaning valve to operate, so as to achieve the self-cleaning object.

Description

technical field [0001] The invention relates to a filter, in particular to a scraper type self-cleaning filter capable of automatically cleaning the filter cartridge. Background technique [0002] The filter is a device used to filter impurities for sewage or waste gas. The existing sewage filter is mainly composed of a shell and a filter cartridge inside the shell. The sewage enters from the sewage inlet below the shell, flows through the filter cartridge and then passes through the shell. The clear water outlet in the middle of the body flows out to achieve the purpose of filtration. [0003] After the filter runs for a period of time, a large amount of impurities will precipitate on the inner wall of the filter cartridge, which will block the filter cartridge and cause the filtration effect to deteriorate. The existing sewage filter is not equipped with an automatic cleaning device, and the filter cartridge needs to be removed for manual cleaning, and then reinstalled af...

AI Technical Summary

Problems solved by technology

[0003] After the filter has been running for a period of time, a large amount of impurities will precipitate on the inner wall of the filter cartridge, which will block the filter cartridge and cause the filtration effect to deteriorate

The existing sewage filter is not equipped with an automatic cleaning device. The filter cartridge needs to be removed and cleaned manually, and then reinstalled after cleaning. Therefore, the cleaning work of the filter cartridge is cumbersome, which wastes time and is inefficient.

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