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信号工凌晨奋战保地铁“耳聪目明”

2017-08-13 07:11:58   中国青年网

本报讯(记者张晟 通讯员曾斯 黄彦)8日凌晨,当天运营刚刚结束,武汉地铁运营公司通号部信号专业2号线金银潭工班工区长张元亮就立即布置夜间作业内容、提醒安全作业注意事项,随后带着工班成员开始当晚的作业。他说,每次作业时间都严格控制在4小时内,就像在与时间赛跑。

作为武汉首条地下轨道交通线路,2号线客流强度大,保持信号系统的稳定是重中之重。每天穿行于地下的地铁列车是靠信号系统指挥,一旦信号系统出现问题,列车就会变得“耳聋眼瞎”,极端情况下会造成列车长时间停靠车站,出现大规模延误。

张元亮所在工班共有成员11人,负责2号线及机场线上从常青花园至天河机场9座车站及天河停车场所有信号系统设备的检修、维护。有着10年以上信号工资历的张元亮说:“信号设备检修绝对是一门细致活儿,稍有不慎就可能影响成千上万人的正常出行。”

武汉地铁信号专业设备分为两大类:一类是室外的轨旁设备,如信号机、道岔转辙机、车轮传感器等,检修频次相较其他设备更密集,且只能在夜间区间断电后的零时至4时这一“天窗时间”进行。另一类是室内的系统设备,主要收集轨旁设备和列车信息,通过计算机运算后,控制列车的运行速度、运行间隔、安全制动距离,系统设备检修周期为每座车站一月一次。

道岔的转辙机是列车运行不可或缺的重要设备,能改变列车进路方向、完成线路两端折返。“每一列车抵达终点站进行折返时,都需要转辙机推动道岔动作完成列车调头。单台转辙机的日平均动作频次在200次以上,光谷广场站的单台转辙机每日动作频次高达300次以上。而在铁路上,即使是客流高峰站,转辙机每天的动作也不会超过100次。”张元亮说。

2号线金银潭工班的任务比其他班组更繁重。每周至少3次夜间作业,必须完成包括道岔状态检查、道岔试验、转辙机内外部检查、安装装置等设备检查在内的八大作业项目,检修清单细分下来有39项任务。而机械杆件和电气元件的拆卸、安装复杂,在仅有的4小时“天窗时间”里必须完成任务,不仅要靠班组成员团结协作,还要求大家手脚麻利、精准到位,每次检修都如同打仗一样。

右图:金银潭工班更换转辙机后维护道岔

供图/武汉地铁运营公司

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