Working Principle of Dredger

The dredger is mainly responsible for dredging the silt of watercourses and rivers, blowing sand and filling the sea. The dredger is mostly expected to smooth the watercourse and control the water ecology. The task of the dredger is to carry out the construction of underwater earthwork. Specifically, it is to dig deep, widen and clean up the existing channels and ports; Excavation of new waterways, ports and canals; Dredging the foundation trench of wharf, dock, ship lock and other hydraulic structures and throwing the excavated sediment into the deep sea or reclamation in land depressions are the sharp tools of sand reclamation. The dredger moves step by step by positioning pile or trolley. After the cutter suction dredger is in place, the steel pile positioning cross excavation construction method is adopted for dredging and reclamation construction. It is a construction method that takes a main positioning pile falling on the center line of the excavation groove as the rotation center of the hull, and makes the cutter swing back and forth laterally from left to right within the width of the excavation groove by relying on the function of transverse movement, so as to make the cutter cut the soil layer of the excavation section in layers. Adjust the left and right traverse winches, and the speed and stop of retracting and releasing the traverse cable, so as to change the moving speed of the cutter and change the different cutting positions of the cutter on the section. Then, the mud water mixture is sucked by the mud pump and transported to the designated reclamation area through the sludge discharge pipeline. The cutter suction dredger uses dredging and other mechanical equipment to excavate according to the requirements of the designed dredging area of rivers and lakes, and hydraulically transports the dredged spoil to the back water side of the embankment through the sludge discharge pipeline, combined with the pressure leaching of the filling pond; It not only helps to expand the flood section, but also helps to prevent the damage of the foundation pipeline. It has been widely used in river and lake dredging engineering. The working capacity of the dredger is expressed by how many cubic meters of soil it can dig per hour. The dredger can be divided into motorized and non motorized. According to the construction characteristics, it can be divided into trailing suction type, hinged suction type, chain bucket type, grab bucket type and bucket type.