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2 0 0 0年下半年 ,某油田的 1台 3ｔ电动单梁起重机发生了因手动遥控装置失控而造成吊钩冲顶的严重事故 ,使电动葫芦外罩严重变形 ,钢丝绳报废。1 事故现场情况经现场勘察与分析 ,发现该起重机起升机构的主控电路 (见图 1) ,手动遥控装置的紧急断电开关只控制其上的运行控制按
In the second half of 2000, a 3t electric single-girder crane in an oilfield suffered a serious accident of hoisting hooks due to out-of-control of a manual remote control device, causing severe deformation of the electric hoist cover and wire rope scrapping. 1 scene of the accident investigation and analysis of the scene and found that the lifting mechanism of the crane control circuit (see Figure 1), the manual remote control emergency switch off only control the operation of the press