■ Metro Line 4 contact rail power supply schematic. (Mr. Wan for map)
■ Line 5 train battery box, and 4 in the structure on the same train line. (Mr. Wu for map)
Guangzhou Metro Line 4 cause of the failure to identify the battery cover release paralyzed 3 hours
■ Express (microblogging) correspondent Zhang Binglu correspondent Ye Zichuan
28, at 7 o’clock, the Guangzhou Metro Line 4 unexpected failure, resulting in paralysis of up to 3 hours. The night after repair, line 4 yesterday morning to restore traffic. However, according to passengers reflects, through Wanshengwei – University of South range road is very slow in the morning driving up to 10 minutes interval. According to the latest report subway, metro paralysis leading to a “foreign body” is actually a cover board the train side of the battery due to abnormal release.
yesterday afternoon, Guangzhou Metro to the media once again updated the night before last (28) occurred in Metro Line 4 shows the causes of power supply equipment. The staff all night on the road district equipment and vehicles on-site comprehensive investigation, identify the reasons for the initial series of car side panels abnormal release the battery cover, hit the contact rail power supply, so that more than 100 meters rail bracket deformation damage, trigger automatic power-off protection. To start yesterday morning before the failure has been ruled out. MTR subway line network at the same time conduct a comprehensive inspection of facilities and equipment to enhance the repair and maintenance.
after the accident, to ensure the safety of passengers, subway south to the University of South Chebei temporarily interrupt the train down range. Range using single-wire bidirectional upstream “bellows” run, that organization Huangcun to Jubei South, University of South Jinzhou two small cross-road to run. Refund 2082 subway that night, issuing tickets 2002.
newspaper Metro Line 4 trains dialogue designer:
“is a major technical failure”
“This could be a major technical failure.” Yesterday, when reporters to a Metro Line 4 has been involved in the design of the train designers, he said, “It’s all part of the train parts problems All of the failures, as long as eventually leading to the train does not run, are big failure. “
may cause serious roll-over
” 4 line run from 2005 has been nearly six years, had never had such a thing out. “Because you do not see in-kind, he can only guess based on experience, the following possibilities: the cover can not afford a long run at high speed, severe vibration cause loose or broken parts, and routine maintenance are not found in time.
He also introduced the Line 4 trains to take power structure. With line 5 and 6 the next line, the 4th line is the linear motor using the train, take the electric train is in the bottom. Train daily to take power by the bottom of the collector shoe device, and when the emergency power when the battery box is enabled. Battery box is also placed in the bottom of the train, but do cover the protection on the bottom side, cover the right side of the door is closed, tighten the bolts to connect with the body. He explained that the car would have to move on the take from the contact rail power supply, power supply line 4 contact rail tunnel wall at the bottom, so the train is to take power from the side. Nevertheless, he did not understand, even if the cover is also loose touch the third rail. “When in the design of these factors are taken into account, unless something will fall encounter, the situation may cause more serious roll-over, dead.” In this case, the traffic section of the automatic power-off protection is a normal trip to do of.
battery cover plate is made of
Guangzhou Metro Line 4 trains a lot to achieve a domestic production. Recently, however, continued the story made the train, people can not help but worry about the existence of the train line 4 quality problems.
interview, the bit involved in 4-wire design designer bluntly, “is indeed a battery box and cover made of stainless steel, if a quality problem in itself, is indeed our responsibility, However, when tested design calculations no problem and now the car ran for six years, during which will replace the battery or maintenance, whether the cover is opened the factory demanding close, this is not clear. “
him Line 4 is not the full range of domestic, only aluminum alloy body, battery box, seats, air conditioning, etc. are made of, while the core technologies are still relying on foreign technology.
for domestic body, quality and reliability of the battery box, he thought, aircraft, trains, subway all aluminum body, itself, there is no quality problems.
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