The first domestically-made electric drive shield machine was built in the Dongli District of Tianjin

The first domestically-made electric drive shield machine was built in the Dongli District of Tianjin

The author was informed that this tunnel excavation shield machine developed and manufactured by China National Heavy Industry Tianjin Heavy Industry Co., Ltd. consists of a front shield, a middle shield, a tail shield, and supporting equipment. It has a huge body 75 meters long and weighs more than 300 tons. The power section is 9 meters long and 6 meters in diameter. It integrates tunnel excavation, lining, excavation, and guidance functions. It covers hundreds of thousands of components such as photovoltaics, machinery, hydraulics, and sensors. The level of system automation is at the forefront of the world and thousands of technical parameters are intelligently controlled. , Heading correction, tool replacement and other work are completed by computer instructions, construction accuracy is higher, per kilometer heading error can be controlled in the centimeter range.

Electric drive shield machine

The shield machine is called the underground "Dragon" and is specially used for tunnel excavation work. The shield machine uses six high-precision positioning, digital control, a total power of 2500 kVA of motor driven tunneling, underground excavation speed can reach 6 meters per hour, excavation diameter up to 6.28 meters. Compared with the conventional hydraulic drive of the shield machine, the speed of the shield tunneling machine has been increased by 20%, and the 24-hour all-weather operation has been achieved, making the tunnel excavation work safer, more environmentally friendly and more efficient.

The shield machine is called the underground dragon.

It is understood that the annual market demand for shield machines in China accounts for more than 60% of the world's total. Prior to this, the core technology of this equipment has been monopolized by developed countries such as Germany, Japan and the United States. The shield machine that was born from Tianjin was far more than abroad, and the price was only half that of foreign countries.