Title:
【発明の名称】ポンプシステム
Document Type and Number:
Japanese Patent JPS58502013
Kind Code:
A
Abstract:
A pump system, particularly suitable for pumping wet mixes and slurries, achieves an output of pumped material substantially free from pulsations or fluctuations by control movement of power pistons (12A, 12B) within power cylinders (10A, 10B). The power pistons (12A, 12B) are connected by piston rods (14A, 14B) to pumping pistons (16A, 16B) which suck material to be pumped in through valves (20A, 20B) and out through valves (22A, 22B) into a delivery pipe (26). A closed loop (32) connects annular chambers (13A, 13B) of the power cylinders (10A, 10B), and a continuously operating pump (P2) feeds the closed loop (32). The power pistons (12A, 12B) on their suction strokes move faster than on the delivery strokes, whereby one or other or both pistons (12A, 12B) are always moving forwards. Control adequate to achieve a smooth delivery of pumped material is achieved by providing sensing valves (PVA1, PVA2, PVB1, PVB2) on each power cylinder (10A, 10B), these valves being arranged to be actuated at different positions of the power piston (12A, 12B) within the cylinder. The sensing valves pass signals to check valves (CV1, CV2) to vent and close the closed loop (32) in response to actuation of the sensing valves and thus to control movement of the power pistons in the cylinders.
Inventors:
Boxes Frederik The Ames
Application Number:
JP50015583A
Publication Date:
November 24, 1983
Filing Date:
November 25, 1982
Export Citation:
Assignee:
Hands-England Drilling Limited
Boxes Frederik The Ames
Boxes Frederik The Ames
International Classes:
F04B9/117; F04B11/00; F04B9/10; F04B15/02; (IPC1-7): F04B9/10; F04B15/02
Attorney, Agent or Firm:
Kenji Yoshida