F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
F04B 1/00 (2006.01) F04B 7/02 (2006.01) F04B 9/117 (2006.01) F04B 11/00 (2006.01)
Patent
CA 2092044
SLURRY PUMP WITH DISCHARGE CYLINDERS, ESPECIALLY TWO-CYLINDER CONCRETE PUMP Abstract For a slurry pump with discharge cylinders, especially a two-cylinder concrete pump with a slurry flow control between a charge funnel, the two discharge cylinders and a discharge line (pipe), as well as a combinatorial circuit controlling the drives of the discharge cylinders and the slurry flow control, and with a control valve as well as a compensation cylinder that prevents slurry flow interruptions during the changeover of the control valve, is provided according to the invention that the combinatorial circuit lets the drive of the just delivering discharge cylinder deliver faster in proportion to the amount of the slurry taken in by the compensation cylinder and delays the change-over of the control valves such that one of the gate valve disks belonging to each discharge cylinder on both sides of the entrance port of the control valve, the size of which conforms to a surface between the discharge cylinder openings such that in the change-over midpoint of the control valve, the opening of the discharge cylinders is sealed off by the gate valve disks and the entrance port in the control valve is sealed off on the surface between the discharge cylinders for the execution of a partial stroke of the discharge cylinder piston that compresses the drawn-in slurry and closes off the opening or the delivering discharge cylinder.
Fetherstonhaugh & Co.
Friedrich Wilh. Schwing Gmbh
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