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N·m)。如果制动力矩达不到要求,或者升降机超载运行,就有可能发生厢笼坠落事故。此类事?容易发生在工人集中上下班时间,这个时段升降机可能出现超载运行。因为目前国产的施工升降机大部分都没有设置厢笼超载限制器。尤其是下班时,因为厢笼下行时的惯性力,加大了厢笼的重量。比如下班高峰时,当升降机满载或超载下行过程中要停层时,这时驾驶员应该把升降旋钮开到?”位,关闭电机让厢笼停下。但关闭电机后厢笼如果继续往下滑行,却越来越快地加速下滑,这就是坠笼事故。这时如果防坠安全器由于种种原因而没有起作用,那么后果就可想而知了?/span><br />     <span style="font-size:16px;">所以当发现厢笼下滑停不住时,驾驶员应该立刻启动电机使厢笼继续下行,依靠电动机强制厢笼由加速运行转入匀速运行,就可以避免事故的发生。但这个操作只能在下滑开始的极短时间内有效,所以需要驾驶员熟悉设备的原理,思路清晰,临危不乱,在短短数秒钟内作出准确判断摆脱危机。但是我们施工现场的驾驶员队伍,又是怎样的一个现状呢?在施工现场的检查中,常将上述情况作为考题,问现场的升降机驾驶员:“碰到如此情况你应该如何操作”。非常遗憾的是绝大多数的驾驶员回答是,按下急停开关。有些甚至不知道该怎么办了。施工升降机控制面板上的急停开关,是在升降开关失灵无法关闭电机的紧急情况下,用来关停升降机的一个开关。当出现停层关闭电机而厢笼继续下滑的情况时,按下急停开关是没有作用的,因为这个时候升降机本来就是处在关闭状态,所以按下急停按钮是不能制止厢笼坠落的。鉴于施工现场升降机驾驶员队伍的这种现状,我们必须加强这方面的知识普及和宣传,以期达到减少乃至杜?a href="//gilbertson-consulting.com/" target="_blank">遵义升降?/a>此类恶性事故的发生?/span><br /> <div style="text-align:center;"> <span style="font-size:16px;"><img src="/uploads/image/20150929/20150929165714_4053.jpg" width="450" height="338" title="遵义升降机不慎失控坠落应急措? alt="遵义升降机不慎失控坠落应急措? 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