To the power of four
Dealing with increased cargo capacity at ports is becoming an ever increasing challenge to the maritime industry, where rapid loading operations are critical. In facing up to this challenge Liebherr has announced the launch of its latest four rope grab cranes for both ship and shore
L
iebherr’s four-rope grab cranes have the ability for continuous operation, not only on land but also
in the open seas. Both the slewing CBG type cranes and the double girder MPG cranes are specially designed for heavy duty continuous operation and provide efficient turnover rates, claim Liebherr. Two major transhipping projects
involving Liebherr’s heavy duty marine cranes have also been highlighted. Coeclerici has
selected 10 units of
Liebherr heavy duty four-rope grab cranes type CBG 350 for installation on its two new tailor-made Supramax offshore transhipping units. Tese vessels operate in Mozambiquan waters on behalf of the South American mining giant Vale and the handling of over 11 million tonnes of coal per year is anticipated. Both vessels have successfully been put into operation. Depending on tidal depths, the
average load for the transhipper is 44,000tonnes of coal, which is then transhipped to open waters, where it is transferred to ocean-going vessels of up to 180,000dwt using the five Liebherr
four-rope grab cranes (one for each hold). Te transhipper is loaded using onshore conveyer belts. During this time the Liebherr cranes are placed towards the aſt of the vessel, whereby a specially developed interlock device is installed in the slewing column and the jib is rested on a console positioned to the side of the pedestal of the next crane. Tis locking system allows for the jib
to be parked (or locked) into position without having to dismount the four-rope grab and so saves valuable time when putting the cranes into operation and/ or when storing the cranes for the short journey between port and ocean going vessel and return, highlights Liebherr. Te Liebherr CBG cranes incorporate
specific features for heavy duty conditions and operation in open water, including compact slewing column design, specially designed heavy duty hoisting winches, heel trim alarm systems and emergency operation functions. Additionally, an extended cabin ensures optimum visibility of the hold for the operator leading to safer and more efficient operation.
Safe and precise crane operation is
further supported with Liebherr’s own Litronic crane control and management system. Litronic facilitates smooth and high speed operation as well as preventive maintenance. Amongst other information the load indication and limitation as well as the load recordings are displayed. Te machine data is recorded, including alarms and failures, and service and inspection intervals can be determined. Optionally, modem access is available for remote fault-finding through skilled Liebherr engineers. The software is available in several languages. The latest major transhipping
project for Liebherr involves the largest transhipping facility to date which has just been delivered by a Chinese shipyard, also for the South American mining company Vale. This facility is handling iron ore from Valemax vessels in Subic Bay in the Philippines. Design and advisory services were provided by Logmarin Advisors of Genoa, Italy, and the 285,000tonnes buffer storage floating terminal is equipped with five Liebherr MPG cranes and a sophisticated conveyor belt/loading system designed and built by Bedeschi. Te cargo handling facility is certified by RINa. The five Liebherr MPG 40tonne
high-speed, heavy-duty, double girder jib cranes are side-mounted on the Vale vessel and have an outreach of 42m. Safety, performance and low maintenance requirements are of utmost importance and the design of
the MPG cranes
considers all of these points: reduced crane height leading to low centre of gravity, no luffing ropes/mechanism meaning less maintenance and better stability of the crane in offshore operations.
Liebherr has supplied its CBG 350 cranes for the Vale bulk carriers
The Naval Architect September 2012 119
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