电葫芦是用来使重物升降的,它的工作位置一般均处在距地面4～5米以上。要是电葫芦发生了安全事故,对人身的危险性是极大的。因此,在起重机的安全操作中必须严禁超载,并且在安全操作规程中也有明确规定。但在工作中实际存在的许多意想不到的和难以估计的超载情况,是禁止不了的。例如,由于对电葫芦的检查维护不周,以致当控制吊钩高度的限制器失灵时,吊钩即继续上升碰刹 Electric hoist is used to lift heavy objects, and its working position are generally 4 to 5 meters above the ground. If the electric hoist a security incident, the danger to the person is great. For this reason, overloading must be strictly prohibited in the safe operation of cranes and is also clearly defined in the safe operating practices. But there are many unforeseen and unpredictable overloaded conditions that actually exist at work that are prohibitive. For example, due to the poor maintenance of the electric hoist, so that when the control hook height limiter fails, the hook that is to continue to rise collision