TECHNOLOGY
EMPOWER :2013-14

Zoomlion Tower Cranes for one of India’s largest Cooling Towers

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Global construction equipment giant Zoomlion and ElectroMech’s Joint Venture partner in India for tower cranes has the distinction of having the second largest installed base of tower cranes in India. Over 550 Zoomlion tower cranes are in operation at various construction sites across the country. The Joint Venture company, Zoomlion ElectroMech India Pvt. Ltd. (ZEIPL) has been building on this formidable base and recently won an order for 2 TCT7527-20 flat top tower cranes to be supplied to Nagarjuna Construction company (NCC), where they will be used to build one of India’s largest cooling towers. The first of these two tower cranes was recently delivered and commissioned. Hyderabad-based NCC has a diversified presence across the burgeoning and growing core sector covering various segments of infrastructure including the construction of buildings and housing, power, mining and railways, among others. The company is leveraging its rich expertise of the past years to address the job of projects execution at present with the sole objective of building India’s future. NCC has an unmatched track record of strictly adhering to the project execution schedule without compromising on quality. Being an important player in the field of power plant engineering and construction, the company has a portfolio of many BOT power projects. Currently, it is in charge of constructing two Natural Draught Cooling Towers (NDCT) for the 1320MW coal-based thermal power project on Muthukur Mandal, Nellore district of Andhra Pradesh. The cooling towers will be 170m in height, with a base diameter of 145m and top diameter of 78m. To carry out the execution of this challenging project, NCC has chosen TCT7527-20 Zoomlion Flat Top Tower Cranes which is the highest capacity flat top tower crane in Zoomlion’s product portfolio. The crane has a maximum lifting capacity of 20t and tip load of 2.7MT at the 75m jib end, or 3.2MT at the 70m jib end. The crane is installed in the centre of the cooling tower.

These innovative TCT7527-20 Flat Top Tower Cranes are specially designed for cooling tower applications. The biggest advantage they offer is that once the cooling tower construction has been completed, the crane can self dismantle one section at a time. This is very important, considering the fact that a 75m jib needs to be dismantled, whereas the top opening of the cooling tower in which the crane will be standing is 78m in diameter. The two cranes are supplied with 185.25m height under hook, and have several features, which include VFD motion in all drives, provision of soft anchoring (sling support), enhanced drum capacity, localised 415V, 50Hz power connection, anemometer, jib & counter jib dismantling device and double trolley automatic reeving change system. Further, taking into account the typically hostile conditions at thermal power plant sites the cranes were specially finished with a unique 'heavy anticorrosion coating scheme' which has been specially developed by Zoomlion. To support NCC in this project, ZEIPL has provided on-site training along with a consumables spare stock to guarantee crane performance and develop customer specialty. The Indian infrastructure construction market shows great interest in heavy capacity tower cranes, Zoomlion-ElectroMech has made it crystal clear that it offers an excellent solution to the emerging Indian infrastructure industry.


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