China’s high-speed rail industry has developed by leaps and bounds in the past 10 years, with high-speed rail construction frequently breaking world records and achieving remarkable achievements. Not only that, the high-speed rail, which has the reputation of China’s “diplomatic business card”, is also an important carrier for the implementation of the “Belt and Road” Initiative and bears the mission of the era of connectivity. Changjia people with professional, pragmatic, innovative and efficient enterprise spirit, committed to the rapid development of China’s railway construction project.
Four gantry cranes designed and manufactured by He Changjia for Xi ‘an Railway Bureau are dedicated to the joint lifting work of high-speed railway tracks. The control system adopts Siemens 1500PLC and Schneider ATV71 inverter, four cranes are a group, the combination of lifting single 100m long track, can achieve centralized control and sub-control functions, unified control by the total operation platform and remote control, can also be operated separately in the cab.
1. Using PROFINET bus control mode and wireless control technology, collect the lifting information of other three cranes to one crane control. When any crane fails, the other cranes can automatically stop working. At the same time, the control system has the functions of sound and light alarm reminder, fault diagnosis, intelligent monitoring, etc., which is convenient for troubleshooting and shortening maintenance time.
2. Soft connection is used between the four cranes, and the absolute encoder is used to control the synchronous operation of the truck drive system. The running error within 300m distance is not more than 150mm.
3. Crane trolley synchronous running using gray bus memory positioning, 20m distance running error is not more than 3mm.
4. The crane electronic control system has a special database, which is used to record the operating status of the equipment in real time, and can calculate the safe working cycle of the lifting mechanism and the cumulative overload number.