Anti-reflux pressurization type filtering device

Abstract

The invention relates to an anti-reflux pressurization type filtering device. The filtering device comprises a grid cylinder, a filter element, screw rods and a driving motor, wherein the screw rods comprise a small screw rod and a big screw rod, the screw diameter of the small screw rod is smaller than that of the big screw rod, the small screw rod and the big screw rod are both arranged inside the filter element, and the thread surface of the big screw rod is in sealing contact with the inner wall surface of the filter element. According to the anti-reflux pressurization type filtering device provided by the invention, as the screw rods comprise the big screw rod and the small screw rod, and the filter element can rotate synchronously with the big screw rod, the small screw rod can rotate relatively to a stator barrel, so that abrasion of the big screw rod can be avoided, the small screw rod is arranged inside the stator barrel, and the filtering effect of the filter element cannot be affected. Compared with the prior art, the anti-reflux pressurization type filtering device provided by the invention overcomes the problem caused by the increasing of the distances between the screw rods and the filter element due to the abrasion of the screw rods, can avoid the operation of regularly replacing the screw rods, and greatly reduces the use cost.

Description

technical field [0001] The invention relates to the field of purification and filtering equipment, in particular to an anti-backflow pressurized filtering device. Background technique [0002] At present, part of the filter equipment is to introduce the fluid into the filter element by means of continuous pressurization during the filtration process. between the screw depth and the filter element; in order to improve the introduction speed and filtration efficiency of the fluid, multiple sections of screws with different diameters will be installed in the filter element, and the screws with different diameters can pressurize the fluid in turn, which can improve the filtration efficiency and The purpose of filtering effect; the disadvantage of this kind of filtering equipment is: in order to ensure that the fluid will not flow reversely under pressure inside the filter element, the distance between the screw and the rotating interior needs to be controlled within 0.5mm, and t...

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Problems solved by technology

[0002] At present, part of the filter equipment is to introduce the fluid into the filter element by means of continuous pressurization during the filtration process. between the screw depth and the filter element; in order to improve the introduction speed and filtration efficiency of the fluid, multiple sections of screws with different diameters will be installed in the filter element, and the screws with different diameters can pressurize the fluid in turn, which can improve the filtration efficiency and The purpose of filtering effect; the disadvantage of this kind of filtering equipment is: in order to ensure that the fluid will not flow reversely under pressure inside the filter element, the distance between the screw and the rotating interior needs to be controlled within 0.5mm, and the screw will be worn after long-term use phenomenon, the distance between the worn screw and the inner wall of the filter element will increase. At this time, the phenomenon of fluid reverse flow will easily occur, which will affect the filtration capacity of the filter equipment. Therefore, this filter equipment needs to be repaired after a period of use. The operation of replacing the screw increases the cost of use

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