In the early 90s of last century, the demand for drag suction dredgers to China’s dredging industry is extremely urgent with the realignment of Changjiang river, especially, the import price of whole dredger is extremely high, so it is the only way leading to dredging industry growth to design and build drag suction dredgers by own efforts in China.
Changjiang Hydrographic Bureau of Ministry of Communications created a new situation to design and build drag suction dredgers in China and established public, impartial global bidding for dredging equipments, that enhancing comprehensively the advanced nature of domestic drag suction dredgers and the global synchronization. Our company take the lead in acceptance of the bid to design and develop completed hydraulic systems, which was matched successfully to a 1,500m3 drag suction dredger of Changjiang Hydrographic Bureau of Ministry of Communications, since then we also supplied completed hydraulic systems to Shanghai Hydrographic Bureau for matching three large drag suction dredgers “Xinhaixiang”, “Xinhaijing” and “Xinhaishi”, which is a series rebuilt project from cargo ships to drag suction dredgers, that has begun the prologue of building large drag suction dredger for domestic dredging industry.
The 8,000m3 large drag suction dredger is the first ship to design oneself with independent intellectual property rights, on which we supplied successfully integrated hydraulic systems and equipments possessing the global synchronization advanced technologies, that enable us to keep leading technology level in the field of large drag suction dredger hydraulic systems.
At present, our integrated hydraulic systems for drag suction dredgers have formed standard series products with the specifications of large-, middle- and small-size and different grades of high-, central- and low-grade, including hydraulic oil cylinders, hydraulic winches, hydraulic control valves, electronic control hydraulic systems and the like, so as to meet the needs of every customer on different demands and various special functions.