PISTON-TYPE PUMP TO SUPPLY HIGH-DENSITY MEDIA WITH CONSTANT RATE Russian patent published in 2008 - IPC F04B15/02 

FIELD: engineering industry; duplex slurry pump.

SUBSTANCE: slurry pump includes two supply cylinders, which pump over the high-density mass from the filling tank into the power passageway. There is a pipe line switch with its cross-section tapering from the inlet port related to cylinders, and to the outlet port related to the power passageway. In any switching valve position, pipe line switch connects the full cross-section of at least one supply cylinder with the power passageway. According to invention, the bearing assembly (20) and the control disk (15), which is tightly connected to it, are connected to pipe line switch (11) on the side turned to the cylinders (3, 5). There is a suction port (23) in the control disk (15), which is situated in sufficient distance from the inlet port (21) to provide the possibility to overshoot the port of one of the cylinders (3, 5) completely. Invention is also related to the control manner for the aforesaid constant flow rate sludge pump.

EFFECT: uninterrupted concrete supply.

25 cl, 5 dwg