A self-cleaning filter for secondary filtration of internal and external filter cartridges

Abstract

A two-stage filtering self-cleaning filter adopting internal and external filter cylinders comprises a seal casing constituting a filter cavity, a pollution absorption pipe and a driving device, wherein a first-stage filter cylinder and a second-stage filter cylinder are arranged in the casing, a water inlet communicates with an inner cavity of the first-stage filter cylinder, water enters an outer cavity of the first-stage filter cylinder through the inner cavity of the first-stage filter cylinder to realize first-stage filtration, the first-stage filter cylinder is covered with the second-stage filter cylinder, the outer cavity of the first-stage filter cylinder is divided into an inner cavity of the second-stage filter cylinder and an outer cavity of the second-stage filter cylinder by the outer cavity of the first-stage filter cylinder, and water enters the outer cavity of the second-stage filter cylinder through the inner cavity of the second-stage filter cylinder to realize second-stage filtration. According to the two-stage filtering self-cleaning filter adopting the internal and external filter cylinders, the internal space utilization rate of the filter is effectively increased, and the maintenance space of the filter is reduced. With the adoption of the internal and external dual-filter-cylinder layout design, the first-stage filter cylinder is arranged in the second-stage filter cylinder, only the length space of the second-stage filter cylinder is required, so that the height of the filter is reduced, and then the maintenance space of the device is reduced effectively.

Description

Technical field [0001] The invention relates to a filtering device, in particular to a secondary filtering self-cleaning filter of inner and outer filter cartridges. Background technique [0002] As a universally used device for water purification, the filter is an indispensable important equipment on the pipeline for conveying fluid media. It is mainly used to eliminate impurities in the medium, thereby protecting the normal use of back-end valves and other equipment. Traditional self-cleaning filter secondary filter cartridges are arranged in front and rear, and its obvious shortcomings are: 1. The required space is the sum of the length of the secondary filter cartridge, and the equipment volume and maintenance space of the equipment are large; 2. The filter direction of the raw water of the filter cartridge is From the outside of the filter cartridge to the inside of the filter cartridge, there is no self-cleaning function. The main impurities are mainly filtered by the seco...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing filter can only filter sequentially. If it needs to be filtered twice, it needs to add a filter device, thereby increasing the length. It provides a self-cleaning filter for secondary filtration of the inner and outer filter cartridges.

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