Head of Harrow Suction Dredger for Dredging and trawling method using this Head Harrow

摘要

The Invention relates to a Head of dredge of dredge Suction Drag. The Head comprises a Rotary Harrow Viewer connected with a Suction pipe to download the floor via the Suction opening of the viewer, the viewer is provided with a Trapping undesirable to Construction objects.The Construction of capture closes the opening of the Suction Passage except openings, in which at least a number of Openings have a variable Passage Passage area. The Invention also relates to a method of Breaking and / or Dredge at least partially sub-aquatic Hard Floors, using a drag Suction Dredger, equipped with a Harrow Head.