Connecting structure of flange and guiding screening bars of papermaking-machine screening drum

Abstract

The invention relates to a papermaking device, in particular to a connecting structure of a flange and guiding screening bars of a papermaking-machine screening drum. According to the technical scheme, the connecting structure of the flange and the guiding screening bars of the papermaking-machine screening drum comprises the flange and the guiding screening bars with screening gaps. Inserting grooves for guiding screening bar to insert are evenly distributed on the flange, the guiding screening bars comprise inserting ends and guiding ends, the inserting ends are bodies matched with the inserting grooves, the guiding ends are slant surfaces, the highest points of the slant surfaces are joined with the bodies through arc join surfaces, and the lowest points of the slant surfaces are jointed with the bodies through connecting surfaces, wherein first included angles exist between the connecting surfaces of the slant surfaces, second included angles exist between the connecting surfaces and the bodies, the second included angles are larger than the first included angles, and confluence areas for collecting and filtering are formed at the join portion of the second included angles and the bodies. According to the technical scheme, the connecting structure of the flange and the guiding screening bars of the papermaking-machine screening drum is large in filtering throughput, capable of shortening filtering time and reducing the production cost and low in maintenance cost.

Description

Technical field [0001] The invention relates to a papermaking equipment, in particular to a connection structure between a flange plate of a screen drum of a papermaking machine and a guide screen rod. Background technique [0002] Drum screen is a filter device used to filter pulp in a paper machine. The drum screen consists of a ring-shaped base, a top frame corresponding to the base, a flange between the base and the top frame, and diversion screen rods evenly distributed around the flange. Screening gap used to filter pulp. [0003] The welding connection between the diversion screen rod and the flange plate promotes multiple welding points between the screening gaps between the diversion screen rods, resulting in a reduction in the filtering capacity during filtration, and the diversion screen rod and the flange plate Connected, after the diversion screen rod is damaged or deformed during use, it cannot be replaced, which causes the entire screen drum to be unusable and high...

AI Technical Summary

Problems solved by technology

[0003] The welding connection between the diversion screen rods and the flange plate promotes multiple welding spots between the screening gaps between the diversion screen rods, resulting in a reduction in the filtration volume during filtration, and the diversion screen rods are fixed to the flange plate If the diversion screen rod is damaged or deformed during use, it cannot be replaced, which makes the entire screen drum unusable and the maintenance cost is high

[0004] Moreover, the adjacent end faces of the traditional diversion screen rods and the end faces facing the inside of the screen drum are all flat. During the pulp filtration process, there will be a large vortex in the screen drum. The diversion angle is small, resulting in a reduction in the throughput of the screening gap, prolonging the filtration time and increasing the production cost

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