February twenty seventh，Organized by China Construction Machinery Industry Association“W12000-Appraisal Meeting of Scientific and Technological Achievements of 450 Tower Crane”Held in Taixing City, Jiangsu Province。Jointly developed by Zoomlion and CCCC Second Harbor Engineering Co., Ltd.W12000-The scientific and technological achievements of 450 tower cranes were appraised.。The appraisal committee, composed of 11 authoritative experts from the industry such as Academician Tan Jianrong, agreed that，W12000-The overall technology of 450 tower crane has reached the international leading level.。

At the appraisal meeting，Vice President of Zoomlion、Chief Engineer Fu Ling delivered a speech，Yu Lekang, deputy general manager of Zoomlion Construction Hoisting Machinery Company, represented the project team.W12000-Achievement report of 450 tower crane，Luo Ling, Assistant Manager of Production Management Department of CCCC Second Harbor Engineering Co., Ltd.W12000-The installation and application of 450 tower crane were reported.。

Experts from the appraisal committee inspected the construction site of the Changtai Yangtze River Bridge.，Having listened to the report of the project completion unit，Reviewed relevant technical data，After inquiry and discussion by experts，An appraisal opinion has been formed.。Deputy Director of the Appraisal Committee、Li Jianyou, a professor-level senior engineer of China Academy of Mechanical Sciences Group Co., Ltd., read out the appraisal opinion.。

▲W12000-Site of Appraisal Meeting of Scientific and Technological Achievements of 450 Tower Crane

The submission shows that，The experts of the appraisal committee agreed that：

W12000-The 450 tower crane has carried out in-depth and systematic research.，It breaks through the design and manufacturing technology of large-scale section heavy-duty split structure.，Initiated“Flat head main tower crane、Auxiliary tower crane with movable arm、Construction lift”Yes“One tower and three machines”New configuration；

It breaks through the design technology of large lifting height and large torque lifting system.，Solved“Double four hundred”(450 tons、400 meters high)Extra large lifting capacity、Difficult problem of large lifting height；

It breaks through the efficient and precise control technology of super-large tower crane.，Intelligent control technology of active protection and safety in complex construction environment has been developed.，The overall technology has reached the international leading level.。

▲Experts of the appraisal committee inspected the construction site of Changtai Yangtze River Bridge

W12000-The 450 tower crane is jointly developed by Zoomlion and CCCC Second Harbor Engineering Co., Ltd.The world's first tower crane over ten thousand tons per meter，It is for the construction of the world's largest span highway and railway cable-stayed bridge.——Tower Crane Specially Built for Changtai Yangtze River Bridge。The product weighs 4000 tons.，Rated lifting moment 12000 t/m，Maximum lifting weight up to 450 tons，Maximum lifting height 400m，It is equivalent to lifting 300 cars to the height of 130 stories at a time.，YesThe world's first perfect realization“Double four hundred”The tower crane。

▲W12000-450 Tower Crane at Changtai Yangtze River Bridge Construction Site

W12000-After 450 tower cranes were installed and put into use in Changtai Yangtze River Bridge Project，So far, it has been stable、More than 1000 hours of efficient operation。Since entering the project，W12000-450 tower crane“One machine for multiple purposes”，High-efficiency assistance to Changtai Yangtze River Bridge pier“Jointing growth”，Won“The hoisting capacity is strong、The operation is smooth、In position. Precise、Safe and reliable、Smart and efficient、The construction benefit is remarkable”And many other affirmations。

At present，W12000-The tower height of the 450 Changtai Yangtze River Bridge project has exceeded 250 meters.，As the construction of the bridge is about to enter the closure stage,，W12000-The 450 tower crane will also rise to 370 meters high.，At that time, the bridge tower segment weighing 240 tons will be lifted to more than 350 meters.。

▲W12000-450 Tower Crane at Changtai Yangtze River Bridge Construction Site

In addition，As the core equipment for the construction of super-long and super-high bridges,，W12000-450 after the completion of the Changtai Yangtze River Bridge，It will continue at the Chaoma Yangtze River Bridge.、Zhang Jinggao has played a role in the construction of major projects such as the Yangtze River Bridge.。

At present，ZoomlionW12000-The 450 tower crane technology has been applied to other super large tower cranes.，The technical system of super large tower crane has been further improved and perfected.，It has promoted the development of a full range of ultra-large tower crane products in China's tower crane industry.，For the bridge、Power construction and other major national construction projects continue to provide core equipment support。