Helical dredge cutter head with scoop-in plates

摘要

A dreging helical cutter suited for use, for example, with a dredger is equipped according to the present invention with scoop-in plates. Earth and sand is transported by helical vanes to a send-out end portion of the helical cutter. The scoop-in plates transport the earth and sand to an opening of an earth/sand suction tube. The opening of the suction tube is provided in a portion of the helical cutter for receiving a rotary shaft. All of the earth and sand excavated by the helical cutter can therefore be sucked into the suction tube and the efficiency of the dredging operation can be greatly increased by a simple structure.