Dirt-sucking-type self-cleaning screen filter

Abstract

The invention provides a dirt-sucking-type self-cleaning screen filter. The dirt-sucking-type self-cleaning screen filter comprises a filter cylinder, a primary filter unit, a secondary filter unit, asecondary filter self-cleaning mechanism, a dirt collecting chamber, a hydraulic driving mechanism and a control mechanism; the primary filter unit, the secondary filter unit and the dirt collectingchamber are sequentially formed in the filter cylinder from left to right, the primary filter unit and the secondary filter unit are separated through a first sealing plate, water passing holes are formed in the first sealing plate, and irrigation water enters the primary filter unit through a water inlet in the filter cylinder, is filtered by a coarse filter net in the filter unit, and then enters the secondary filter unit through the water passing holes, and the secondarily filtered water flows out through a water outlet in the secondary filter unit; and the secondary filter unit and the dirt collecting chamber are separated through a second sealing plate, and the hydraulic driving mechanism drives the secondary filter self-cleaning mechanism to clear a fine filter net. The cleaning process is simple, continuous water supply can be realized, and the dirt-sucking-type self-cleaning screen filter is simple in structure and does not need to be driven by power equipment.

Description

technical field [0001] The invention relates to a hydraulically driven dirt-absorbing self-cleaning net filter, which belongs to the technical field of water treatment. Background technique [0002] In recent years, as the contradiction between supply and demand of water resources has become increasingly prominent, in order to ensure the healthy, stable and sustainable development of agriculture, the development of water-saving irrigation has become a strategic choice to alleviate the contradiction between supply and demand of water resources. As a water-saving irrigation method with good water-saving effect and high irrigation quality, micro-irrigation system has been more and more widely used. However, the micro-irrigation system has relatively high requirements on the water quality of irrigation water due to the small water outlet of the irrigator, which is easy to be blocked. High, in order to ensure the normal operation of the system, the irrigation water, especially th...

AI Technical Summary

Problems solved by technology

When backwashing, the sewage valve is opened, and the motor or piston drives the sewage suction pipe to rotate and move axially, and the dirt is sucked into the sewage suction pipe. After opening the sewage valve, the pressure at the outlet of the sewage suction pipe decreases, and the sewage is discharged into the sewage chamber And it is discharged from the sewage outlet. The automatic cleaning process does not affect the filtering process of the equipment, and can realize uninterrupted water supply. However, the self-cleaning components of the commonly used sewage suction screen filters need to be equipped with driving devices such as motors and hydraulic structures, and the equipment structure is complicated. , the cost is relatively high, and generally all need electric drive, so there are certain limitations when applied in areas where electricity is not yet covered. In addition, the automatic cleaning of the commonly used filters is only for the secondary filter unit, and the cleaning of the primary filter unit is still It needs to be shut down and disassembled for manual cleaning

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