Security filter convenient for filter element replacement

Abstract

A security filter convenient for filter element replacement comprises an upper shell, an upper top cover, a lower shell, a lower bottom cover, a flange ring, supporting legs, a porous plate, a plurality of filter elements and a fixing pressure plate. The upper shell and the upper top cover are integrated, the center of the upper top cover is provided with a lifting hole, the filter elements are arranged in the upper shell, lower ends of the filter elements are mounted on the porous plate, and the fixing pressure plate is arranged at upper ends of the filter elements. The porous plate is connected to the lower shell through the flange ring, and the lower shell and the lower bottom cover are integrated. The flange ring is fastened by an annular bolt and can be quickly dismounted without tools, and after the bolt is unscrewed and an upper barrel of the security filter is taken down through the top lifting hole, seal rings and holes in the filter element mounting porous plate can be directly observed, so that time saving and labor saving in mounting and demounting of the filter elements are realized while the interior of the security filter can be flushed thoroughly to prevent influences on subsequent equipment and water quality due to contamination of the security filter.

Description

technical field [0001] The invention relates to the field of security filters for sewage treatment, in particular to a security filter for easy replacement of filter cores. Background technique [0002] Security filter, also known as precision filter, is generally installed before the pressure vessel to remove fine particles larger than 5 μm to meet the requirements of subsequent processes for water intake; sometimes it is also installed at the end of the entire water treatment system to prevent fine particles (such as broken resin) into the product water. Security filters are widely used in drinking water treatment, circulating water treatment, boiler feed water treatment, sewage treatment and other fields. Its working principle is that the liquid to be filtered is pressed in from the filter inlet, passes through the filter layer from the outside to the inside through the filter element and is filtered into a clear liquid, and then discharged through the outlet. Impuritie...

AI Technical Summary

Problems solved by technology

The disassembly of large-flow filter elements is a time-consuming and labor-intensive task. Although many large-flow filter element manufacturers claim to adopt a handle-type humanized design, when the filter element is actually installed and disassembled, due to the limitations of the original security filter structure, manual It can only act on the top of the filter element, not directly on the fixed porous plate of the filter element. It needs to

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