What is the reason of wire rope electric hoist lifting out of control?
Electric wire rope hoist more lifting machinery workshop production line often lead to out of control due to lift the Wire Rope to be Jiaoduan, hanging items off situation.
Rope electric hoist lift out of control mainly due to the following three points:
(1) AC contactor main contacts sintered link. Improper quality problems of the contactor or contactor selection, the main contact is often sintering adhesions can not be disconnected when the disconnect, and to cause electric hoist can not be stopped rising. AC electrical appliances at the reliable quality must choose the regular manufacturers of qualified products, due to the frequent electric hoist operation, the contactor must choose the appropriate models.
(2) control button. Mainly for the button Insulation puncture short button short circuit insulation breakdown due to frequent operation, making it effective insulation destruction. Poor working conditions caused by leakage current is not timely maintenance, substandard quality also contributed to the common cause of failure of the control button. Therefore, to ensure safe operation, in addition to select the product of acceptable quality, but also to strengthen the routine maintenance and timely resolution of potential accidents.
(3) the trip switch control failure. Timely power outage in the the electric hoist rise reached the limits of location safety precautions stroke control switch stroke control switch is prone to loosening displacement phenomenon, due to the long-term, frequent use, or, worse, in replacement of the wire rope to remove it, thus losing the emergency protection device, resulting in a total hit hidden. Operators, maintenance personnel, safety education should be strengthened!