Zoomlion released the world's largest up-slewing tower crane

China Securities Network News (reporter Duan Fangyuan) On October 25, Zoomlion held the world's largest up-slalom tower crane off-line ceremony at the Changde Tower Crane Intelligent Factory, and released the world's largest up-slalom tower crane W12000-450.

In recent years, with the development of new infrastructure and the rapid development of prefabricated buildings in China, the use of large tower cranes has become more and more extensive. Tang Shaofang, vice president of Zoomlion and general manager of Construction Lifting Machinery Company, said: "The development and maturity of the heavy lifting industry and the industrialization of the construction industry mark that the current era of the tower has entered. ”

The world's largest up-slalom tower rolls off the production line

According to reports, the world's largest upper slewing tower crane W12000-450 off the line is Zoomlion's tower machine specially built by Zoomlion for the construction of the world's largest span public-railway dual-purpose cable-stayed bridge - Changtai Yangtze River Bridge, which is used to solve some bridge construction problems such as large lifting load on the bridge deck, high accuracy requirements, difficulty in high-altitude hoisting, and strong river surface construction wind speed, which can greatly shorten the construction cycle and save construction costs.

The product weighs 4,000 tons, the rated lifting torque of 12,000 tons, is the world's first super large crane with an upper slalom of more than 10,000 tons, its maximum lifting weight reaches 450 tons, and the maximum lifting height is 400 meters, which is equivalent to the height of 300 cars to 130 floors at a time.

The company that ordered the W12000-450 tower crane is CCCC Second Aviation Bureau. Shi Zhiyong, deputy general manager and chief engineer of CCCC Second Aviation Bureau, said that the choice of Zoomlion as a partner this time mainly focuses on the company's R&D strength, R&D strength and product quality.

"Zoomlion, as the leader of technical research in the tower crane industry, has a strong R & D team, has organized and undertaken national research projects for many times, presided over the preparation of industry standards, and has the most authoritative tower crane technology center and the largest tower crane institution laboratory in China. At the same time, Zoomlion has the world's largest tower crane intelligent factory, and has world-class product manufacturing experience in a full range of hammers, booms and flatheads, and the market share of tower crane products ranks first in the world. In addition, the 10,000-ton meter-level tower crane components proposed this time are large in size, large in weight, and complex in the operating environment, and the operation process cannot be lost. Through past cooperation, it is believed that Zoomlion has the advantage of undertaking the development of 10,000-ton meter-class tower cranes, and the final facts also prove that Zoomlion has the D5200 project team as the R&D and design team, and the efficient linkage of nearly 200 builders in 6 factories has ensured the successful launch of the super machine. Shi Zhiyong said.

It is understood that the Changtai Yangtze River Bridge is a super large bridge, the construction load is very large, the span is super long, the main span is up to 1176 meters, is the world's largest span of public and railway dual-purpose cable-stayed bridge under construction. According to the bridge design plan, the need for a super-large tower to meet its construction method - the 400 tons of precast concrete pieces hoisted to a height of nearly 400 meters, Zoomlion specially developed the W12000-450 tower crane to meet the construction needs, the product will be mainly used for the project after the project will be mainly used for the project Pier 5 main tower tower column and upper tower column hoisting construction.

At present, the bridge has entered the stage of tower column construction, and the construction of the steel parts and large sections of the world's tallest tower will begin soon. After the completion of the construction of the Changtai Yangtze River Bridge, the W12000-450 tower crane will continue to help build the world's largest span three-tower cable-stayed bridge - Anhui Chaoma Yangtze River Bridge.

Smart factories help the advent of "heavy weapons"

According to industry insiders, the key technology of the super-large tower crane is complex, the safety and reliability requirements are high, and deep technology accumulation is required; creating new records, bravely breaking into no man's land, and more needing technological innovation; large volume, weight, and welding and other high requirements, more need to match the production process.

"In the absence of precedents for structural patterns, we have re-established a computational platform for structural rigidity, stability, and modal analysis." The relevant person in charge of Zoomlion said.

According to the person in charge, the W12000-450 tower crane uses Zoomlion's independent innovation of split flat head single-arm frame technology, rod single pin tenon extra large standard section technology, "eight diamond" smooth large change small jacking transition technology and many other world-first technologies, so that the W12000-450 tower crane not only achieves a strong lifting performance of 10,000 tons of meters, but also ensures the convenience of products from the aspects of transportation, assembly and dismantling, as well as the safety and reliability of the use process.

In addition to the deep technical accumulation required in R&D and design, production and production are also a great challenge. W12000-450 tower crane uses nearly 4000 tons of steel, the maximum size of a single piece is 14 meters x 6 meters x 6 meters, the maximum weight of a single piece is 66 tons, and the total length of the weld is 5.8 kilometers, it is a huge challenge to make such a large, difficult to weld and high precision tower machine.

Tang Shaofang introduced: "In the large tower workshop of the world's largest tower crane intelligent factory, we use digital welding machines equipped with T-joint full penetration welding technology to overcome the technical problems of ultra-thick plate welding cracking. More than ten sets of high-precision CNC machining centers have been invested to complete the precision machining of ultra-long and ultra-wide ultra-heavy parts. We have built a large water-based coating line to ensure that large workpieces are painted without dead ends and are marine-grade heavy corrosion protection. In the smart factory 6 large workshops, 200 large tower craftsmen, after 136 days and nights of hard work, the big country heavy equipment was successfully launched. ”

Forward-looking layout pilots the era of large towers

On the same day, Zoomlion also held the National Hoisting TOP20 Summit Forum.

At the forum, Feng Mingtao, chairman of Nantong Construction Machinery Technology Co., Ltd., said: "I personally believe that large towers and super towers will be the trend of industry development. ”

At the same time, Feng Mingtao believes that with the qualitative change of PC construction methods in green, ecological and intelligent buildings, it will completely change the traditional lifting technology construction methods, highlight the non-air operations that can be completed on the ground, and the need to be completed in the air depends as much as possible on mechanical equipment to adopt large modular overall hoisting, which will greatly improve safety performance and construction efficiency, which will be a new opportunity for large and super large tower cranes to emerge.

Yue Zhiguo, deputy general manager of Southwest Leasing Company of China Construction Second Bureau, said that with the rise of prefabricated buildings, small tower cranes have been phased out, bringing about the growth of the structural market of medium and large towers, especially since 2017, with the development of PC building components to large-scale, the selection of PC building construction in first-tier cities has shown a trend of medium and large tower machines to the 200tm-400tm series. Since 2018, the 40tm-63tm series of small tower cranes have dropped by more than 80%, while the share of large tower cranes has doubled, since 2020, as the industry gradually enters a stable development stage, the share of large and super large tower cranes has further increased, and the sales of large tower cranes with Zoomlion 600tm and above have increased by more than 100% in 2021, and the development trend of equipment large-scale is obvious.

Zoomlion has been deploying this for more than ten years, and has laid out in advance from many aspects such as technology accumulation, product spectrum, manufacturing, and market.

"In the tower crane above 600 tons, we already have 25 models. 17 flat heads, 8 boom tower cranes. Secondly, our field covers a wide range: bridges, wind power, thermal power, nuclear power, hydropower, venues, super high-rise 7 major construction areas, all have our big towers. The relevant person in charge of Zoomlion said.

Industry insiders said that the downline of Zoomlion's world's largest up-and-loop tower crane W12000-450 shows the market Zoomlion's R&D, design, production and manufacturing capabilities in the field of large tower cranes, and further consolidates its global leading edge.