On the evening of February 28th，CCTV《Focus interview》Reports“Hoist the heavy device Hardcore leads”This paper describes the pursuit and innovation of super-large cranes in China.、Self-reliance and self-improvement，Realize from scratch，Then to the world's top development process.。The program mainly focuses on the initiative of Zoomlion.、Dedicated to independent research and development，Constantly overcome the technical problems of super-large cranes，Break foreign monopolies，The super-large crane developed has broken the global lifting record many times.，Realize the transformation of domestic lifting machinery from following to leading；At the same time，It also provides equipment support for large-scale key projects in many countries.，Fully demonstrate the elegance of the most important weapon of the country。
Here are the highlights of the show.：
Changtai Yangtze River Bridge is located in the Taixing section of Changzhou in the lower reaches of the Yangtze River.，It is the largest highway and railway cable-stayed bridge under construction in the world.。And the super crane involved in this super project，It's also a top Big Mac.，It is the world's first Tower Crane of over 10000 tons and meters manufactured in China.。Looking back more than ten years ago，The crane in our country is still in the following stage.，Super-large cranes are totally dependent on foreign imports.。Just a dozen years，China's super-large cranes grow out of nothing，To the top of the world，What is the story of the development of the crane industry?？
▲W12000-450 Tower Crane at Changtai Yangtze River Bridge Construction Site
February twenty seventh，The Changtai Yangtze River Bridge is under intensive construction。At this very large-scale project site,，A Tower Crane with a height of more than 200 meters is noticeable.。It is the world's first over 10000 tons of tower crane.。Two months later.，It will carry out the most difficult tasks.——Lift the pier weighing 240 tons to more than 350 meters.。
Changtai Yangtze River Bridge Project Department of CCCC Second Harbor Engineering Co., Ltd.、Xie Ping, Deputy Manager of Equipment Department：“As the bridge enters the closure period，The tower will rise to a height of 370 meters.，Lift the tower segment weighing 240 tons to more than 350 meters.，It is equivalent to lifting 120 cars to the height of 120 stories at the same time.。And the scene is facing the river wind.、Weather and many other challenges，This will be a pioneering work in the construction of bridges in China.。”
▲W12000-450 Tower Crane at Changtai Yangtze River Bridge Construction Site
Cranes are divided into mobile and non-mobile models.，An immovable type like this is called a tower crane，Usually, the tower crane that lifts 100 tons of weight is already a super-large model.。Compared with our common tower crane for building ordinary buildings,，The scale of super-large tower crane is tens of times larger.，But it is by no means a simple enlarged version.，It's the disruption of technology.。
Ten years ago，The research of super large tower crane in China is just in the initial stage.，Breakthrough of only one super-large tower crane jacking technology，It took the researchers two years.。With the continuous heightening of buildings,，Tower crane needs to grow with it，This process is called jacking.。In the past，Tower crane jacking technology with small tonnage is not difficult.，However, it is very complex and dangerous to lift the super-large tower crane.。
Yu Lihu, Senior Engineer of Zoomlion Construction Company：“The biggest problem of heightening is imbalance.，In particular to a super-large tower crane.。From ten years ago.，Domestic for super-large、The demand for large tower cranes is increasing.，A power unit can no longer fully meet the requirements of our tower crane.，The upper part weighs more than a thousand tons, so it is heightened.，We need multiple power units to achieve this.。”
▲Yu Lihu, senior engineer of Zoomlion Construction Company, is discussing with the team.
Jacking of small tower crane，The top half of the tower crane can be jacked up with a hydraulic device.，And the jacking of the super-large tower crane，Multiple hydraulic facilities need to be jacked up at the same time.，Once synchronization is not achieved，The tower crane will lose its balance and capsize in an instant.，The plane was destroyed and people were killed。At that time，Most of the super-large tower cranes in foreign countries are manually adjusted.，Extremely high requirements for technical operation，But there are still big risks.。How to achieve intelligent synchronous jacking，Reduce the frequency of manual operation，Reduce risk，It is a difficult problem for Yu Lihu to solve.。
There is no way that this study can be used for reference.。Yu Lihu and his colleagues experimented with many methods.，Experienced failure after failure.，It took two years.，The final solution was found.。
Yu Lihu：“We have done a lot of experiments.，Different sensors were installed in different positions for comparison.，Finally, the most suitable installation position was found.，Multiple sensor data can be calibrated in real time，Make sure it's in sync。”
▲Heavy lifting equipment made by Zoomlion
With this technology,，Lifting safety of super-large tower crane is greatly improved。Tackling technical problems like this，It runs through the development of China's crane industry in the past ten years.，The historical record of the world's super-large cranes is constantly being broken by products independently developed by our country.。And more than a decade ago,，The cranes in our country are still in the running.，No oversize crane products。
Vice President of Zoomlion、Chief Engineer Fu Ling：“Cranes have a long history of following，Before 2010，We already have small and medium tonnage cranes.，But large cranes used to be imported.。”
▲Heavy lifting equipment made by Zoomlion
Fu Ling is a senior engineer in the crane industry.，She still remembers being ignored when she first attended the international industry annual meeting more than a decade ago.。
Fu Ling：“I attended the 2010 annual meeting for the first time.，When discussing standards and soliciting opinions, we need to get a confirmation.，The chairman of the International Organization for Standardization Crane Technical Committee will raise his head respectfully.，America，The United States saidyes，Put a check mark，Germany、America、Japan is like this，But every time I come to China,，He doesn't even have to look up.，China，He's waiting for you to say.yes，yesMeans consent，yesIt means I agree with it all the time.，yesIt means there is no point of view。”
There is no market，There is no right to speak，At that time, China's crane industry wanted to achieve a qualitative breakthrough.，We must speed up the pace of independent innovation.。At the same time，The rapid development of China's economy，Large-scale construction of major national projects，It also forces the crane industry to accelerate its progress.。
▲The 3,200-ton Crawler Crane built by Zoomlion is Hualong 1.“Crowned”
Hualong One Nuclear Power Station is the first nuclear power station with completely independent intellectual property rights in China.。The dome of the nuclear power plant weighs three or four hundred tons.，It is necessary to lift such a huge object and drop it accurately.，At that time, only foreign mobile cranes could do it.。At the beginning of the design of Hualong One，The state has issued a demand to several large domestic crane manufacturers.。
Fu Ling：“At that time, Zhonglian、Xugong and other four units gathered.，He said such a thing.，And ask if the company has the confidence to do it.，For us，The country has needs，Then Zoomlion is responsible.。”
Immediately，Four enterprises have started to tackle key technical problems.，Different types of super-large Crawler Cranes have been offline one after another.。
▲Vice President of Zoomlion、Chief Engineer Fu Ling and team members discuss in the workshop
Fu Ling：“As soon as we announce we're offline,，Then when our test data is up to the standard.，At that time, foreign countries sold us a machine for nearly 400 million yuan.，Then the price was immediately reduced to more than 200 million.，This actually shows that we have competition with foreign countries.。”
After being verified by multiple projects,，The dome of Hualong 1 Nuclear Power Station has been successfully hoisted by a Crawler Crane independently produced by China.。
After that，Driven by national demand，China Crane Continues to Catch up with Innovation，Completed the leap from following to running side by side，Super-large aircraft break world records repeatedly，Firmly occupy the domestic market。Such an achievement，It has also been recognized by the international crane industry.。
▲The Secretariat of the International Organization for Standardization Crane Technical Committee is located in Zoomlion.
All these years，China's crane industry is not only recognized for its technology，The market share ranks first，It is also more and more deeply involved in the formulation of international standards.。From 2013，China has proposed and successfully issued five international standards for cranes.，Nine are under development.。More and more crane talents have become registered experts of international standards.。
Now，Chinese cranes are constantly breaking their own records.，Is also going green.、Number、Intelligent direction and high quality development。
▲The industry's first green smart site released by Zoomlion
Liu Yanbin, Assistant Dean and Director of Technology Research Center, Academia Sinica, Zoomlion：“Our equipment is autonomous and unmanned.，Each piece of equipment has its own perception system，It can plan itself.，Make your own decisions。Such a high degree of unmanned，The secrets are hidden in our boxes.，This is our intelligent construction brain.，It can achieve intelligent scheduling.，Greatly improve our management efficiency，But also can improve the construction safety of the construction site.。In the future, we will closely integrate the current system with the construction method.，It is widely used in the infrastructure construction of major projects in our country.。”
▲Intelligent Construction Brain of Zoomlion's Green Intelligent Construction Site
From following to running side by side，And then work hard to achieve the lead.，China's cranes have stepped out of a national demand pull，The Development Road of Independent R & D and Innovation。This is a vivid practice of Chinese modernization.。The growth process of Chinese cranes once again tells us，We must constantly break through in technology.，At the same time, we should train a contingent of talents.，Continuous innovation、Self-reliance and self-improvement，Only then can we firmly grasp the destiny of development and progress in our own hands.，Injecting Inexhaustible Power into High Quality Development。
