A variable gap backwash filter

Abstract

The invention relates to a variable-gap reverse-washing filter which comprises a filter shell, a filter assembly, a guide assembly and a driving assembly, wherein the filter shell comprises a shell body; a lower shell cover is arranged at the lower end of the shell body; a connecting pipe is connected to the other end of the shell body; an upper shell cover is connected to the other end of the connecting pipe; a feed liquid reverse discharging opening is formed in the lower shell cover; a liquid outlet is formed in the connecting pipe; the filter assembly comprises a framework, an upper positioning plate and a lower positioning plate; filtration pores are distributed in the framework; an end head and a core plug are mounted at two ends of the framework; a lower sealing cover is mounted on the framework on one side of the end head; an upper cover is mounted on the framework and in a position close to one side of the core plug in a sleeving manner; a tension spring is mounted on the outer circumferential surface of the framework in a sleeving manner; an upper positioning ring and a lower positioning ring are mounted on the tension spring; the guide assembly comprises guide rods, an upper limiting plate and a lower limiting plate; the driving assembly comprises a driving cylinder. The variable-gap reverse-washing filter has the advantages as follows: the filter can be automatically adjusted according to the sizes of impurities, impurities on the filter screen can be effectively removed, and the service life of the filter can be further prolonged.

Description

technical field [0001] The invention relates to a filter, in particular to a variable gap backwash filter. Background technique [0002] At present, many enterprises still use the traditional multi-layer sintered mesh and trapezoidal wire wound filter element filter. During the continuous process of filtration, the solid-phase impurities in the liquid are trapped on the surface by the filter element, gradually deposited, and backwashed. It is difficult to remove the solid phase impurities trapped on the surface of the filter element, which eventually leads to an increase in the pressure difference across the filter element and a decrease in filtration efficiency. This type of traditional filter has the following disadvantages: low filtration accuracy; after the filter element fails, a new filter element must be replaced, or the filter element must be removed for cleaning, causing the entire system to shut down and stop production, which wastes manpower and affects follow-up ...

AI Technical Summary

Problems solved by technology

[0002] At present, many enterprises still use the traditional multi-layer sintered mesh and trapezoidal wire wound filter element filter. During the continuous process of filtration, the solid-phase impurities in the liquid are trapped on the surface by the filter element, gradually deposited, and backwashed. It is difficult to remove the solid-phase impurities trapped on the surface of the filter element, which eventually leads to an increase in the pressure difference between the two ends of the filter element and a decrease in filtration efficiency.

This type of traditional filter has the following disadvantages: low filtration accuracy; after the filter element fails, a new filter element must be replaced, or the filter element must be removed for cleaning, causing the entire system to shut down and stop production, which wastes manpower and affects follow-up work. Normal operation cannot meet the continuous requirements of industrial production, and it is difficult to discharge sewage; the filtration equipment occupies a large area, resulting in waste of space

[0007] However, when the above structure is used for adjustment, it is necessary to manually rotate the upper baffle to adjust the compression or elongation of the spring, which is inconvenient and cannot be used for continuous production.

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