LIQUID HANDLING PROPORTIONING PLUNGER PUMP WITH SLIDE GATE Russian patent published in 2002 - IPC

FIELD: handling of high viscosity liquids with considerable solid inclusions. SUBSTANCE: pump has drive and hydraulic parts. plunger of pump is connected with cylindrical gate which has different diameter bases. Larger base adjoins plane of pump head square to plunger axis, being provided with channels located symmetrically relative to axis. Channels are connected with liquid suction and delivery lines. Delivery line has channel one end of which is constantly connected with pump chamber, and other end is connected with suction line channel at beginning of suction stroke, and with delivery line channel at end of suction stroke after turning of plunger with gate around axis. Seal is installed in cylinder to form ring-shaped chamber between pump head, cylinder and gate. Ring-shaped chamber is connected by open channel with delivery line. EFFECT: increased wear resistance of plunger pair. 5 dwg