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active drag head----, 1.low cost, high quality, 2.extensive use, 3.perfect post-service, 4.superior performance - details see: https://www.machineto.com/dn1000-active-drag-head-10311739

active drag head-----

Huaxia dragheads are designed in a modular setup so that the main body can be fitted with different types of visor. This means that the draghead can easily be converted into the required type for the soil that needs to be dredged, without the need for an entirely new unit.

Huaxia standard dragheads are available as Universal draghead, California type draghead and Turbulence visor draghead. Universal dragheads are best suited for general use in varying soil types, a California draghead is recommended for compact and firmly packed soil types, turbulence visor dragheads offer superior performance in soft and free flowing soil.

The drag head mainly consists of a visor carrier and a movable visor, connected by heavy duty hinges. Wear parts are made of highly wear resistant material and can be easily replaced.

The position of the visor is self-adjusted by gravity, enabling optimised contact with the ground. The visor is equipped with a water flap at the top (California and Turbulence visor type) or at the aft end (Universal type) of the visor, which is adjusted mechanically. The water flap opening can be adjusted to the soil properties and to the suction head of the dredge pump.

The soil is loosened by pressure water jets and by cutting teeth (California and Universal type), both arranged over the whole width of the visor. The visor carrier includes a jet water connection to the side suction pipe. Jet water nozzles are arranged in a replaceable steel beam which is mounted below the hinge line. The effect of the pressure water can be adjusted to the dredging conditions by using different sets of nozzles.