The grab ship unloader is the main unloading equipment in ports. The bridge grab ship unloader could travel on the rail. The transporting vehicle could move under the bridge. When the grab bucket grasps the materials, the materials would be unloaded into the conical hopper. Then the materials would be transported to the belt conveyor through the discharge hole of conical hopper. Finally, the materials could be unloaded to the storage yard.
The grab bucket could be changed to fit materials with different density and particle size； The structure of grab bucket is simple and maintenance work is little； There is a special superiority for corrosive bulk materials； There is good adaptability for particle size between 300-800 mm； There is good adaptability for various hatchways without the limitation of sea level.