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成都动车段:受电弓检修 护卫动车“生命线”(图)

2017-08-30 01:15:25   央广网

成都动车段:受电弓检修,护卫动车“生命线”。(周兵摄)

央广网重庆8月30日消息(记者刘湛 通讯员周兵)汽车没了汽油就会失去动力,每天行驶在千里铁道线上的动车也不例外。安装在车顶的受电弓是动车从接触网取得电能的重要电气设备,是动车的“生命线”。

“1号碳滑条13.4毫米,2号碳滑条14.1毫米,两者相差0.7毫米,符合要求。”近日,成都动车段运用检修库内,地勤机械师文帅和杨敏正在对CRH2A型动车组受电弓进行检修,通过检查和测量判断受电弓是否存在故障。

针对今年暑运期间西南地区高温、雨天多的实际,该段严把日常检修作业关,制订受电弓故障应急处置预案,运用高科技手段实时动态监控,全力确保动车受电弓作用良好。

在车顶上,文帅和杨敏认真检查受电弓外观是否正常,用弹簧秤对受电弓静态接触压力进行测量,用钢直尺测量碳滑条剩余厚度,仔细检查表面有无贯穿裂纹和高压电蚀现象。“如果两根碳滑条之间的厚度差大于3毫米或者存在贯穿裂纹等,就必须同时更换两根碳滑条,静态压力值差超过20N就要重新调试风压。”文帅严肃地说。由于受电弓检修涉及近百个部件,该段结合车顶分布情况,总结出了受电弓“V”字检修作业法,确保无漏检、高效率。在检修库的另外一端,地勤机械师马明晶和邓明明在对遭遇暴雨袭击的动车组受电弓进行专项检查。当天,他们发现受电弓风管受夏季高温多雨天气影响,出现老化漏风现象,随即进行更换,消除了行车安全隐患。

由于运行环境复杂,要确保动车组受电弓的绝对安全仅靠精检细修还不够。每列动车车顶都有两组受电弓,动车组运行时,只需要升起一组受电弓即可完成引流任务,而另一组为备用。“当受电弓发生故障后,我们会在确保无脱落危险的情况下通过Mon屏将故障受电弓切除,启用备用受电弓担当后续交路。反之,我们就会立即通知司机临时停车,申请区段接触网断电,登上动车车顶对故障受电弓进行捆绑处理。”该段随车机械师张欢说。

高速运行的受电弓裸露在动车车顶上,实时监控显得尤为重要。大多数动车专门设计了受电弓监控设备,随车机械师通过Mon屏就可以动态监控受电弓运行情况。而在入库检修时,弓网监测系统也会对受电弓重点进行检测,发现异常系统就会自动报警,为检修工作提供数据支撑,通过受电弓人机双控的方式全力确保安全。

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