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Dead water is the nautical term for a phenomenon which can occur when a layer of fresh or brackish water rest on top of denser salt water, without the two layers mixing. A ship powered by direct thrust under the waterline (such as a propeller), traveling in such conditions may be hard to maneuver or can even slow down almost to a standstill. Much of the energy from the ship's propeller only results in waves and turbulence between the two layers of water, leaving a ship capable of traveling at perhaps as little as 20% of its normal speed.
Environment-friendly shallow sea clay mine mining device and method
The present application relates to the technical field of marine mineral resources exploitation equipment, and discloses an environment-friendly shallow clay mine mining device and method, which comprises a ship body, an extraction mechanism connected to the ship body, a supporting mechanism connected to the lower part of the extraction mechanism, a lifting mechanism connected to the supporting mechanism, and a mining mechanism connected to the lower part of the lifting mechanism. The present application adopts an internal-external differential speed self-adaptive stirring mechanism, an outer pot-lid-shaped self-adaptive stirring head drives flexible stirring blades to rotate, and the surrounding clay slurry is smoothly scraped to the central area. The internal rigid conical stirring head and the external stirring head form differential rotation, and the central slurry is forced to be stirred and broken through the spiral guide groove and wedge-shaped stirring fan blades, so that the problem of the "central dead water area" of traditional equipment is completely eliminated.
Owner:QINGDAO LUHAI TESTING TECHNOLOGY CO LTD