The shield machine, the pride of the world    

The morning of May 2nd, when Henan "51 labor medal", China Railway Tunnel Group shield tunneling technology and State Key Laboratory of executive director Chen Kui, he is busy preparing the first draft of the book "Chinese shield": "the main contents of the book, is to introduce China's production of shield machine from scratch, from there to. The course of development."

The shield machine is used for high-end technology and equipment, subway tunnels, culverts, mining, is recognized as a major measure of key equipment of national equipment manufacturing industry level and ability, it is worthy of the name "weighing country", but for a long time can only rely on imports. "When I began to contact the shield machine in 2001, I happened to be responsible for the external bidding procurement of the shield machine." Chen Kui recalls that it takes about 60000000 yuan to introduce a shield machine from abroad.

In 2002, the nationalization of shield and tunneling technology was included in the National 863 plan, and Chen fed on the road of shield machine research. From the cutter to the hydraulic system and the electrical system, the technical team led by Chen fed one of the other technical difficulties.

Chen Kui said that in the process of research, the most impressive thing is to work with the team to solve the problem of the shield machine guidance system. He introduced that the shield machine guidance system is like a "GPS", which can ensure that the driving path is not offset. "Shield tunneling needs to be in strict accordance with the scheduled track. Once a few centimeters of deviation appears, it will cause tens of millions of yuan economic losses."

In order to obtain first-hand information, Chen and team engineers often stay in the tunnel day and night, for thirty or forty hours. Through more than a year of research, they finally conquered the international technical problem. After continuous improvement, the shield guiding system developed by China railway equipment group can control the construction error within 20 millimeters, and the selling price is only 40% of the foreign system.

Under the guidance of Chen Fu, the State Key Laboratory of shield and tunneling technology in Zhengzhou was formally accepted by the Ministry of science and technology in 2012. It has undertaken over 50 research projects at all levels, and has trained more than 1700 people in the shield industry. Nowadays, China Railway Equipment Group has grown into a high-end equipment manufacturing enterprise with the largest variety of domestic shield products, and its products are the first share of the domestic market.

From the "shield of building the Chinese people" to "the Chinese shield heading for international", we reviewed the way of shield research in the past more than 10 years. Chen Fu said, "technology leads the future, and innovation is endless. I will work with my team to promote the efficiency of the shield industry and contribute to the construction of a large province of advanced manufacturing.