SCREEN FOR SIZING CONSTRUCTION MATERIALS Russian patent published in 2013 - IPC B07B1/22 

FIELD: process engineering.

SUBSTANCE: invention relates to screening rocks and construction materials, crushing and sorting jobs, and screen sizing of construction materials. Proposed screen comprises drum, drive, loading and unloading devices. Drum perimetre represents multistart screw perforated surface with inside and outside helical channels at 5°-45° to drum lengthwise axis composed of bicurvature pockets with centres of curvature located inside and outside its cross-section. Said drum is composed of one or more perforated wavy equal-width bands arranged at the angle to lengthwise edges of perforated band. Said perforated wavy surfaces compose curved pockets that differ in shape and sizes along the drum perimetre. Note also that the distance between flexure lines equals the sum of lengths of perimetres of geometrical figures of inner and outer surface pockets.

EFFECT: higher efficiency.

6 dwg