INCLINED ARCHIMEDEAN SCREW PUMP FOR REMOVING VISCOPLASTIC AND OOZE-AND-SAND MASSES (VERSIONS) Russian patent published in 2002 - IPC

FIELD: pumps. SUBSTANCE: invention can be used for cleaning aeration tanks of sewage works, containers with vegetable oil sediments, tanks with residual fuel oil, manure heaps, etc and as hand tool of divers or rescuers of ESM service at clearing ooze and mudflow drifts. Proposed screw pump has housing in cylindrical space of which screw is installed for movement. Screw has single-start thread at its input and multiple-start part of screw blades at its output. Single-start part is enclosed in blade feeder which has shafts coaxial with screw and different rotation speeds, shafts being connected with coaxial output shaft of reduction gear. Input shaft of reduction gear is connected with drive. Feeder is enclosed in fixed lattice housing. blade of single-start part of screw is provided with flange over outer perimeter at site of housing. Said flange is secured on blade lifting surface at angle from 90^° to 140^° with possibility of changing of changing the height from 10% to 60% of pitch of single-start part. Sense of feeder rotation coincides with sense of screw rotation. Ratio of screw rotation speed to feeder rotation speed is from 1.5 to 40. EFFECT: provision of high capacity at handling viscoplastic and ooze-and-sand masses, reduced power consumption and metal usage at manufacture of pump. 10 cl, 9 dwg