| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-thrust dredging pump capable of efficiently performing suction of dredged material with a high concentration when dredging a river, quicksand of a coast, sludge, and the like and also transferring the dredged material directly to a remote place, and capable of reducing frictional resistance of a pipe wall during transferring the dredged material.SOLUTION: A dredging pump device reduces the pressure of a vacuum generating chamber by using high pressure water to generate a pressure circumstance close to a vacuum environment, and dredges a deposited dredged material, while a vacuum state is generated in the vacuum generating chamber. The dredging pump device is configured so that: the vacuum generating chamber is hermetically sealed so as not cause high pressure jet water reversely flow to a lower part, in order to keep a high thrust against a back pressure generated in the propulsion direction; the thrust is kept high and air is introduced from the outside into the vacuum generating chamber; and the air exhibits an effect as lubricant in a transferred object and the transfer resistance in a flow path is reduced. |
