Movable turn-taking backwash net type filter

Abstract

The invention discloses a movable turn-taking backwash net type filter which comprises a shell, an upper gland, a base, a water inlet, a water outlet, a blow-off pipe and a net type filter element. The movable turn-taking backwash net type filter is characterized in that the upper gland and the base are arranged at two ends of the shell; the blow-off pipe is arranged on an outer wall of the shell and close to the upper gland; a gear transmission device is arranged on the upper gland; the bottom end of the base is connected with a water outlet, and a water inlet is connected to an outer wall of the base; the net type filter element is arranged inside the shell; two ends of the net type filter element are sleeved in a U-shaped rubber ring in an annular groove on the upper gland and the base; a circular ring clapboard is arranged between the outer wall of the net type filter element and an inner wall of the shell; the circular ring is connected with a power pull rod; the power pull rod is connected with the gear transmission device; and the circular ring clapboard moves under the action of the power pull rod. Compared with the prior art, the movable turn-taking backwash net type filter has the advantages that the circular ring clapboard is arranged between the inner wall of the shell and the net type filter element, the circular ring clapboard moves to perform turn-taking backwash on different sections of the net type filter element, and the filter is simple in structure and has obvious effect.

Description

technical field [0001] The invention relates to a mobile alternate backwashing screen filter for filtering an agricultural irrigation system. Background technique [0002] Currently, mesh filters used in agricultural irrigation systems generally use clean water from other filter units to backwash the filter unit. In the working state, the filter itself cannot be filtered and backwashed at the same time. Although there are some mesh filters that can simultaneously complete the filtering and backwashing under working conditions, the effects of filtering and backwashing are not very good. Moreover, the structure is complex, the operation is cumbersome, and the force on the circumference of the mesh filter element is uneven, which may easily cause deformation of the mesh filter element and increase operating costs. For example, a kind of automatic backwash filter disclosed in patent CN 1421261A includes an outer casing with a water inlet, a water outlet and a sewage outlet, and...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the filter itself cannot complete the backwashing of the entire filter screen at the same time in the normal filtering state, and the force of the filter screen is uneven under the backwashing condition, causing the deformation of the filter screen and increasing the operating cost

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