SCREW PUMP FOR CLEANING VISCOPLASTIC AND SAND-AND-SILT MEDIA Russian patent published in 2001 - IPC

FIELD: cleaning and transportation of various viscoplastic and sand-and-silt media; cleaning and discharging gel-like media in food-processing, chemical and petrochemical industries and in farming. SUBSTANCE: proposed pump has multi-start screw feeder mounted in housing with outlet branch pipe. Single-start part of screw feeder is embraced by bladed feeder with part of movable housing whose speed and direction of rotation are different relative to screw feeder. Screw feeder and housing have coaxial shafts. Outlet branch pipe is provided with pipe for introducing the jet of liquid towards motion of mass. Ridges of screw feeder blades are bent along axis of shaft or towards its rotation on part of last pitch by the amount close to inner diameter of outlet branch pipe. Angle of inclination of branch pipe to axis of screw feeder does not exceed helix angle of screw feeder blades. Blades feeder is provided with fixed lattice-like protective casing. EFFECT: increased productivity. 5 cl, 7 dwg