Dredging apparatus

摘要

Mud is taken into a vertical screw conveyor (1) while an inlet device is rotating or without the use of such an inlet device. The mud is sent from the discharge port of the conveyor into a transport pipe (24). The mud is forcibly sent by a compressed air. Screens are provided to take only the mud into the screw conveyor. Paddles for stirring mud are provided on the vanes of the screw. A check valve and/or a pressure feeder (transport pump) is provided between the discharge port of the conveyor and the transport pipe.