| 摘要 |
PURPOSE:To prevent the pollution of water as well as raise the efficiency of dredging operation by a method in which deposits on the bottom under water and floating sludge of a low water content are continuously collected and sent under pressure to the ground's surface through a sludge-sending pipe. CONSTITUTION:A dredger 1 consists of a sludge excavating and collecting unit 10, a sludge pressure-sending unit to be connected to a sludge-sending pipe 20, and a hanging unit 40. The unit 10 and the unit 30 are connected along the direction of dredging and the unit 40 is fixed to the unit 30. Floating sludge and sludge deposits collected by the unit 10 are forcibly sent into the unit 30 by the propulsory force of the dredger, stored there, and then sent through the pipe 20 to a distant place by compressed air.
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