Late at night! They climbed the 5500 meter first sea crossing bridge
Ningde super major bridge of Wenzhou Fuzhou railway is 8169.28m long in total and 5500m long in sea crossing part. It is the longest sea crossing bridge in domestic passenger dedicated railway at present. Every day, nearly 100 bullet trains pass through the Ningde super bridge. In order to ensure the safe and stable operation of power supply equipment on the bridge, in the early morning of every day, catenary workers repair and maintain the railway power supply equipment, so they are called "high altitude night pedestrians".
At midnight, there was a roar of locomotives at Ningde station of Hangzhou Shenzhen railway. The OCS workers in Ningde power supply area of Fuzhou power supply section are ready to start their day's work. At 1 a.m., they worked against the cold wind and boarded the 6-meter-high OCS platform to repair the spider like OCS. They remove the unstressed hanging strings with their hands and feet, install the new adjustable hanging strings, and tighten the loose nuts carefully. This work seems to be a disassembly work, but it is actually a fine work. They should strictly implement the installation process and carry out fine calibration to ensure the accuracy of each hanging string, installation position and height. If the suspension string is damaged, the light one will change the smoothness of the contact line, and the heavy one will damage the pantograph on the EMU, resulting in the failure of the EMU. In order to ensure the accuracy of the installation, they have used the "black technology" - 4C inspection car to conduct a comprehensive inspection of the lines in the pipe.
"Black technology" - 4C inspection car.
It can realize high-speed collection, storage and automatic analysis of catenary suspension component image. There are 30 cameras with 30 million pixels installed on the roof to take photos of the OCS equipment from multiple angles, which is four or five times more efficient than manual detection. Because the bridge is built on the sea, the sea wind is strong and the air salinity is high, the power supply equipment of Ningde super bridge is seriously corroded. In order to ensure the stable operation of power supply equipment, they need to remove rust and paint about 1500 mounds on the bridge in batches. In order to ensure the safety of power supply, such skylight maintenance work has to go through 5 times a week.