The chain bucket dredger uses a dredging bucket mounted on two parallel steel cables to excavate sediment, and uses a chain wheel and steel cable at the top of the bucket tower to pull the dredging bucket for excavation and unloading. This type of ship is suitable for excavating harder soil. The grab dredger uses a large grab to directly grab sediment, suitable for excavating harder soil or salvaging underwater objects.

The rake suction dredger sucks in sediment through suction pipes and transports it to the mud tank on the ship. This type of ship is suitable for operation in wide and sandy waters. The cutter suction dredger uses a cutter device to cut the sediment and transport it to a designated location through a mud pump and pipeline. It has strong excavation ability and is suitable for various complex water environments.

A dredger is an engineering vessel mainly used for dredging, channel dredging, land reclamation, sand extraction and other construction projects in rivers, lakes, seas and other water bodies. Dredgers can be divided into rake suction dredgers, cutter suction dredgers, chain bucket dredgers, grab bucket dredgers, etc. according to their working principles.

Dredgers mainly use various types of dredging machinery for operations, such as grab buckets, suction pipes, etc. Through excavation, vertical lifting, and horizontal transportation, they excavate silt or sediment underwater and transport it to the designated destination. The sand dredger drives the excavator bucket to load materials through a power device, and cooperates with screening devices, lifting devices, and conveying devices to screen and clean the excavated sand for continued use or sale.

Dredgers can be classified into various types based on their working principles and uses. Among them, the rake suction dredger sucks in sediment through the suction pipe and transports it to the mud tank on the ship; The cutter suction dredger uses a cutter device to cut the sediment and transport it to a designated location through a mud pump and pipeline; The grab dredger, on the other hand, uses a large grab to directly grab sediment, making it suitable for excavating harder soil. In addition, there are various types of dredgers such as chain bucket and bucket to meet the needs of different projects.