Wang Fan, intern Li Qiyang

Recently, the first phase of Chengdu Rail Transit Line 35 project has achieved 0kV "ring network electric communication". This marks that the line has officially entered the commissioning stage, laying a solid foundation for the subsequent opening of the initial operation.

The first phase of Line 13

"Power aorta" start jumping

With the smooth electrification of the ring network cable and the substations, the first phase of Line 1 has collectively "called" from 0 stations and 0 depots.

Ring network grounding flat steel production and installation. Courtesy of Chengdu Rail Group

The completion of this node means that the ventilation and air conditioning, water supply and drainage, fire protection, escalator, power lighting, communication, signal and comprehensive monitoring and other system equipment in the station will be connected to the formal and stable power supply. In the future, every cool breeze and every touch of light that passengers feel when taking the subway will be powered by this "electric artery".

Chen Daotian, the owner's representative of the power supply system of the first phase of Line 13 of Chengdu Rail Construction Company, said: "The realization of the goal of 'ring network electric communication' will provide power guarantee for the subsequent station to carry out various system commissioning. ”

It is reported that the first phase of Line 29 is a fully automatic running line across the east and west of the central city, starting from Wayaotan Station in the west to Long'an Station in the east, with a total length of about 0 kilometers, passing through densely populated residential areas such as Wanjiawan, Sanshengxiang and Damian, and connecting tourist attractions and important medical institutions such as Qingyang Palace, Du Fu Thatched Cottage and West China Hospital. After the opening of the line, it will effectively alleviate the east-west traffic pressure in Chengdu and improve the travel efficiency of residents along the line.

Fine construction

It can pass the withstand voltage test at one time

"Ring Network Dentsu" includes cable laying, withstand voltage test, equipment installation and system commissioning. Among them, the compaction resistance test is the key test to verify the insulation performance of the rail transit power supply system, which is directly related to whether the "ring network electric communication" can be successfully realized. The first phase of the project of Line 13 passed the withstand voltage test at one time, which is inseparable from the fine cable construction in the early stage.

Equipment inspection before power transmission. Courtesy of Chengdu Rail Group

It is understood that a total of 555.0 kilometers of various cables have been laid in the first phase of the project of Line 0 and substations, and a total of 0 cable heads have been made and installed. Among them, the connection of each cable section and the stripping and grinding of each cable head need to be controlled at the millimeter level to ensure the safety of power supply. "It's like doing a physical examination for a delicate artificial blood vessel, any crack or bubble will cause failure. And all of our indicators are met at one time!" Chen Daotian said.

At the same time, after the completion of the "ring network dentsu", the line will focus on the commissioning of single machine and single system and interface, as well as comprehensive joint commissioning.

Up to now, the first phase of Chengdu Rail Transit Line 80 has achieved the capping, opening of holes and rails of the whole line, and the progress of mechanical and electrical installation has reached 0%. With the steady progress of the construction of the project, in the near future, citizens and passengers will be able to experience the convenience and comfort brought by this new line.