FIELD: hydraulic power engineering. SUBSTANCE: piping casing is provided with a pipe having a screw wound on it. The casing is horizontal and bears on the pontoons, the half of diameter of the casing being submerged into liquid. The casing is rigidly connected to the screw and kinematically connected with the drive. The faces of the casing are provided with plugs made up as ballast sections. The inlet opening is made in the casing at the inlet of the screw. The space of the pipe bounded with the inlet of the screw and cut-off is plugged. EFFECT: improved design. 2 dwg
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