On April 20, 2023, the world's largest tower crane, which incorporates 158 innovative scientific research achievements and 305 invention patents, rolled off the production line at Zoomlion Changde Tower Crane Intelligent Factory. The breakthrough is also another historic breakthrough in the development of my country's advanced manufacturing. Its appearance will provide more advanced solutions for my country's industrial heavy-duty and construction industrialization, and further enhance the influence and competitiveness of Chinese brands in the global tower crane field.

Cao Zhiqiang, Secretary of the Changde Municipal Party Committee, announced the official launch of the product, and jointly launched the ceremony with You Ruikai, Secretary of the Party Committee and Chairman of CCCC Second Navigation Engineering Bureau Co., Ltd., and Zhan Chunxin, Secretary of the Party Committee, Chairman and CEO of Zoomlion. The ceremony was presided over by Zhou Zhenyu, deputy secretary of Changde Municipal Party Committee and mayor, Tang Shaofang, vice president of Zoomlion and general manager of Construction Hoisting Machinery Co. The senior management team, as well as more than 600 people from all over the country, including industry associations, industry experts, leaders of safety supervision stations, construction units and customer representatives, witnessed this historic moment together.

Great powers help build national super projects

The world's largest tower crane R20000-720 is jointly developed by Zoomlion and China Communications Second Navigation Engineering Bureau. The rated lifting moment is 20,000 tons, the maximum lifting capacity is 720 tons, and the maximum lifting height is 400 meters. A car was hoisted to a height of 130 floors. This product integrates 158 innovative scientific research achievements and 305 invention patents, including more than 60 core key technologies and 12 world-first technologies.

The world's largest tower crane R20000-720

It is understood that after the delivery of the R20000-720 off the assembly line, it will be used in the construction of the world's largest span three-tower cable-stayed bridge - the Ma'anshan highway-rail Yangtze River Bridge project.

The Ma'anshan Highway-Railway Yangtze River Bridge adopts a three-tower steel truss girder cable-stayed bridge structure, of which the construction mileage of the CMSG-2 standard constructed by the China Communications Second Navigation Engineering Bureau is DK51+687 (the main bridge of the Yangtze River Bridge)~DK57+329.218 (the Yangtze River Bridge The center of F1 pier), with a total length of about 5642.218 meters, mainly includes the south main tower and the superstructure of the 1 km main bridge, 114 road-rail joint construction piers of the approach bridge, 12-hole railway beams and 228-hole upper road beams. R20000-720 can fully meet the hoisting of bridge tower steel structure, and will provide solid equipment guarantee for project construction.

Perfect technology achieves the strongest in the world

"Our R20000-720 has made innovations and breakthroughs in counterweight technology, structural technology, intelligent control technology, etc., and solved many problems of super-large tower cranes operating under complex and extreme conditions such as strong wind, high humidity, and heavy loads. This is a world problem." The relevant person in charge of Zoomlion said. The application of these technologies makes this "world's largest" a well-deserved "world's strongest".

According to him, the R20000-720 applies Zoomlion's first mobile counterweight technology in the industry, which allows the counterweight to move precisely with the change of the lifting torque, achieving a significant improvement of more than 60% in hoisting performance.

In addition, R20000-720 also innovates high-load lightweight structure configuration and heavy-load split structure design. Under the premise of ensuring high load-bearing capacity, the weight of the upper-mounted structure of the tower crane is reduced by more than 20% compared with the conventional solution, which solves the problem of transportation and installation. , Removal of difficult problems, more convenient to use.

The world's largest tower crane R20000-720

In order to make the heavy equipment more sensitive, Zoomlion has also worked hard on intelligent control technology. The deeply developed multi-source information fusion ETI intelligent control system applies 230 intelligent control strategies and 50 intelligent technologies to achieve millisecond-level response, allowing R20000-720 to achieve "fast" while being "big" and "stable". and "quasi".

The successful roll-off of the world's largest tower crane R20000-720 indicates that Zoomlion has mastered the mature technology of large towers and stands at the forefront of industry development.

Intelligent production line empowers big tower manufacturing

As a heavy equipment that breaks the record of "the world's largest tower crane", is its manufacturing a larger project volume and a longer production cycle? Regarding this problem, the relevant person in charge of Zoomlion said, "The overall implementation of the R20000-720 project has reached 33,280 man-days, which is equivalent to 120 people working continuously for 10 months. However, through intelligent manufacturing, we will focus on controlling 8 types of key control projects. The evaluation and formulation of 18 concurrent projects took only 8 months from design to offline, 2 months faster than W12000-450, which set a record for the fastest delivery cycle, creating another miracle of speed.”

After 67 years of extreme exploration, Zoomlion has continuously accumulated, made breakthroughs and sublimated in the field of construction machinery, created the world's most advanced R&D and design platform called the "Kingdom of Freedom", and built the world's largest tower crane smart factory. Manufacturing leads product upgrades.

It is understood that Zoomlion Tower Crane Intelligent Factory currently has 40 intelligent production lines, including 12 unmanned black light production lines. With the support of intelligent production lines, flexible chemical equipment, high-precision heavy-duty machining equipment, and the investment of nearly a thousand large tower craftsmen, Zoomlion's super-large tower crane manufacturing capacity has achieved quantitative and qualitative breakthroughs. At present, Zoomlion's tower crane intelligent factory can realize the full coverage of the production of 13 types of large-scale tower cranes ranging from 500 to 20,000 tons, and the products produced can meet almost all the hoisting demands of large-scale hoisting.

A scene of the production line of Zoomlion Changde Tower Crane Intelligent Factory

The ultimate product performance strength brings hot market performance. Many large tower cranes of Zoomlion have already stood majestically on the great rivers of our country to assist construction. At the ceremony site, Zoomlion also held a signing ceremony for a series of large-scale tower cranes. After delivery, these products will contribute new strength to my country's fiery construction and ensure the smooth progress of many major projects.

It is reported that Zoomlion's market share of large towers is in an absolute leading position in the industry, and it is the largest large tower manufacturer with the most deliveries and the strongest production capacity in the world. Currently, there are dozens of super large towers being produced simultaneously in the tower crane intelligent factory.

"It is not self-important in the end, so it can become great." Zoomlion regards every new breakthrough as a new starting point for innovation, surpasses itself time after time, and breaks the world record time after time. Industry experts said that the successful launch of the R20000-720 this time marks that Zoomlion has further explored in the "no man's land" of tower crane technology, and its leading advantage in the "big tower era" is more obvious.Editor/Ma Xue