HOPPER FOR HARD-TO-FLOW MATERIALS Russian patent published in 2000 - IPC

FIELD: mechanical engineering; materials handling facilities. SUBSTANCE: proposed device prevents forming of bridges and provides mixing of materials in process of discharge from stationary and mobile carriers. Hopper has coaxially installed main shaft and additional hollow shaft. Cantilever spiral is rigidly secured on lower projecting end of main shaft. Spiral of additional hollow shaft is connected by its upper end to shaft through locked bushing adjustable in height, lower end of spiral being connected to movable bushing arranged under stop. Stop arranged on lower end of additional hollow shaft prevents slipping off of movable bushing. Upper coils of main shaft spiral enclose lower coils of additional hollow shaft spiral. Spirals have opposite hand of helix. Counterrotation of shafts is provided. EFFECT: increased intensity of bridge breaking, provision of loosening and mixing of material components. 2 cl, 1 dwg