Self-cleaning suction filter

Abstract

The invention provides a self-cleaning suction filter, wherein raw water is introduced from the water inlet of the filter, enters a rough filtering cavity via a rough filtering screen, enters a fine filtering screen from the rough filtering cavity, and is subjected to secondary filtration of the fine filtering screen and then discharged from a water outlet; a dirt suction device assembly is rotationally arranged at the centre of the fine filtering screen and is communicated with a dirt discharging cavity through a dirt suction pipe; the dirt suction pipe is fixedly provided with a plurality of T-shaped suction nozzles for adsorbing attachments on the internal wall of the fine filtering screen, at intervals; the self-cleaning suction filter further comprises a sand gathering cavity which is located at the tail end of the fine filtering cavity and communicated with the fine filtering cavity; the heights of the rough filtering cavity, the fine filtering cavity and the sand gathering cavity are reduced gradually; and a suction pump is communicated with the dirt discharging cavity through the suction pipe. According to the self-cleaning suction filter disclosed by the invention, dirt and debris, the external diameters of which are bigger than that of each suction nozzle, in the raw water can be automatically gathered in the sand gathering cavity and then discharged timely, so that the filter still has a stable filtering function after being operated for a long time; and therefore, the self-cleaning suction filter is especially suitable for water-purifying projects in the fields such as agriculture, drip irrigation of melt snow water and coal mines.

Description

technical field [0001] The invention relates to a device in the field of water treatment precision filtration, in particular to a self-cleaning filter suitable for harsh water quality conditions, large diameter particles of pollutants in a water system, and low requirements on system pressure. Background technique [0002] The Chinese Invention Patent Application Publication No. 200810217079.8 filed on October 24, 2008 and published on April 8, 2009 discloses an electronically controlled self-cleaning filter for online purification of industrial circulating water. Its structure is generally as figure 1 As shown, the raw water is input into the coarse filter chamber 102 from the water inlet 101, and the impurities with large particles in the raw water are intercepted by the coarse filter screen 103, and then enters the fine filter chamber 104, and the purified water is further filtered by the fine filter screen 105, and then the purified water flows from the water outlet 106 ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-cleaning suction filter, which aims to improve the technical defects in the prior art that the raw water quality conditions are complex and the large particles of dirt in the water are difficult to be effectively collected or removed.

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