GDT-EH Series / Hybrid System Grab Dredging Crane

As regulations on gas and CO2 emissions are a major issue now, environmental measures are becoming important in the construction & machinery industry from the perspective of responding to SDGs. To meet with these requirements, the hybrid grab dredging machine system was developed. It is a mechanism to convert the falling energy into electricity at the time of lowering grab bucket, store it in the power storage device, and use the stored electricity to assist winding up grab. Comparing to conventional machines it is possible to reduce fuel consumption about 20-30%. It does not lower down the dredging ability, but more consideration for the environment is also possible.

The GPS Grab Dredging Engineering Management System facilitates the dredging work by watching dredging spot and depth at the sea bottom where is difficult to visually check. The working progress is recorded by the system, that will navigate the way for dredging next time and this may help the work undergoing without waste. In addition, the flat-dredging control system allows greatly to reduce dredging sediment residue and the feature of depth meter helps dredging work at an accurate specified depth, makes the work more efficient.

An independent anti-vibration system for operator’s cab is adopted by putting anti-vibration rubber between the machine body and the operator’s seat, in this way to minimize the vibration of the machine body transmitting to the operator’s seat. Compared to conventional cranes, operator’s fatigue and burden is much more lightened. Additionally, by providing enough soundproofing, operator can have a conversation without stress even while working in the crane.

Surveillance cameras are equipped over the drums so as to help operator watch the winding status of the wire rope. In addition, various devices are installed to ensure safety, such as the alarm that reacts to each over-hoisted and overload, and the stop slewing function by the sensor installed on the foldable stairs for boarding crane.

By putting the hoisting and open-closing operation levers in the clutch position, only with one control lever it is carried out to wind up and lower down the grab bucket easily. Moreover, the grab bucket opening degrees meter helps operator understand grab bucket opening degrees within from 0% to 100% in real time.

Various control such as torque converter in speed control mode or torque control mode, and various operation of crane movement can be adjusted to the operator’s easy-to-use settings.

SKK’s proprietary torque converter. Electronic control provides powerful, smooth operation and delicate speed control. Corresponding to the weight of the dredging amount, the speed of winding up is automatically changed to fit with the lifting load, the impact during operation is eased and smooth, stress-free operability is achieved.