Rake head dredging system, trailing suction hopper dredger and method for reducing digging resistance by rolling friction

Abstract

The invention provides a rake head dredging system, trailing suction hopper dredger and method for reducing digging resistance by rolling friction and belongs to the technical field of dredging engineering. The rake head dredging system comprises a rake head fixed body, a rake head movable cover with rake teeth, a drag reduction rolling body and a high-pressure cleaning system. The rake head movable cover is assembled with the rake head fixed body, and the drag reduction rolling body is installed at the bottom of the rake head fixed body. The high-pressure cleaning system comprises multiple grooves formed in the surface of a wear reduction roller in the direction of a connecting shaft, multiple high-pressure nozzles arranged in each groove and a pressure pipeline connected with the high-pressure nozzles. The rake head dredging system has the beneficial effects that the drag reduction rolling body is provided in the rake head structure, the digging resistance is reduced, and the diggingefficiency is improved under the installed power of an existing drag suction dredger; and meanwhile, the high-pressure cleaning system is used to wash and loosen a soil layer by high-pressure water flow before the rake teeth cut the soil layer to reduce the cutting resistance and wash the soil attached to the wear reduction roller.

Description

technical field [0001] The invention belongs to the technical field of dredging engineering, and relates to a dredging head dredging system, a dragging suction dredger and a method for reducing excavation resistance by using rolling friction during the construction operation of dredging engineering and marine engineering. Background technique [0002] With the acceleration and deepening of marine development, dredging engineering and various fields of marine engineering have developed rapidly. In dredging engineering, trailing suction dredgers are one of the important engineering ships commonly used. Typical way of sediment disposal. With the improvement of dredger manufacturing technology and industry demand, trailing suction dredgers are developing towards large-scale development, and the cabin capacity and installed power continue to increase, while the dredging capacity of dredgers mainly depends on the total installed power. Therefore, when the installed power is deter...

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Problems solved by technology

[0004] The object of the present invention is to overcome the deficiencies of the prior art, and provide a drag head dredging system, a drag suction dredger and a method that utilize rolling friction to reduce excavation resistance, so as to solve the drag head resistance of existing drag suction dredgers. To solve the problem of insufficient power consumption, improve the dredging efficiency of the trailing suction dredger without changing the installed power of the ship

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