Underwater silt lifting pump - has delivery tube with funnel end raised and lowered inside cylinder by hydraulic actuators inside cylinder

摘要

A pump for lifting silt etc. from the bottom of a lake, canal, river etc., has a conveying tube (1) connected to a vessel floating above, and attached at the bottom to a cylinder (3), supported on legs (9). a drive (5) is mounted inside the cylinder in the upper half. The tube (1) terminates in a funnel (2) which is raised and lowered inside the cylinder by the drive. In the bottom of the cylinder are inwardly opening relief valves (7), and on the tube, above the cylinder are one or more outwardly opening relief valves (8). The funnel carries radial plates (2a), and between them and similar plates (4a) inside, the top of the cylinder are attached hydraulic cylinders (5) forming the drive.