SCREEN Russian patent published in 2016 - IPC B07B1/18 

FIELD: construction.

SUBSTANCE: invention relates to loose material classification and may be used in construction, mining, metallurgy industry, etc. Screen comprises screening surface, drive, loader and unloader. Screening surface is made in form of spiral shape of tunnel, fixed on platform installed elastically on bed. Screening surface is rigidly fixed on platform with vibrator mounted horizontally under platform, and is spiral from hollow tunnel with multi-start screw perforated surface along perimeter of coiled along spiral axis 0₁-0₁ around central rectilinear axis 0₂-0₂ of helical screening surface provided with screw grooves inside at angle to its spiral axis in form of pockets of wavy shape with centers of curvature arranged alternately inside and outside cross section of hollow tunnel. Screening surface is assembled of sections as identical in shape and size rings coiled of identical rhomb-shaped perforated strips, where trapezoid lateral sides of which are located on lateral sides of diamond band, and upper and lower bases of trapezoids are arranged at acute angle to axis of symmetry of diamond band 0₃-0₃ and are flexure lines located at distances from each other equal to length of pockets of wavy shape along inner surface of spiral shape hollow tunnel. Sections in form of rings are interconnected by lateral sides of trapezium.

EFFECT: technical result is increase of productivity and efficiency of screening.

1 cl, 7 dwg