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1用途及主要技术性能60万kW以上的大型电站机组，吊装高度往往超过90m，上部最重设备锅炉汽包重约30t。为了提高工作效率，缩短工期，保证施工安全，希望把大量高空安装工作化解为地面作业，即在地面拼装焊接后再整体吊装。这就对大吨位、大起升高度的起重机提出了要求。为了充
1 Uses and Main Technical Performances Large hydropower units with a capacity of more than 600,000 kW often have a lifting height of over 90m, and the heaviest boiler drum in the upper part weighs about 30t. In order to improve work efficiency, shorten the construction period and ensure the construction safety, I hope to solve a large number of high-altitude installation work for the ground operations, that is, after the ground assembly welding and then hoisting the whole. This is a large tonnage, lifting height cranes made the request. In order to charge