PNEUMATIC-SCREW FEEDER FOR LOOSE MATERIALS Russian patent published in 1995 - IPC

FIELD: power industry; pneumatic transportation of loose materials, delivery of coal dust and ash to pipelines. SUBSTANCE: air-screw pump has cylindrical housing accommodating auger in form of shaft with screw thread on its surface chamber to mix material with transporting agent adjoining the outlet portion of housing, and check valve separating mixing chamber from housing. Outer diameter of shaft at side of mixing chamber is 0.1 - 0.95 of diameter of the rest portion of shaft on section equal to 0.1 2.0 of pitch of auger last turn from point of tapering of turn. EFFECT: increased capacity of feeder. 1 dwg