Lost crane accident refers to the lifting operation, the suspended load,spreaders and other heavy objects falling from the sky caused personal injury and equipment damage accident.
Lost hoist equipment accident refers to the lifting operation, the suspended load,spreaders and other heavy objects falling from the sky caused personal injury and equipment damage accident.
Common Lost incidents have the following types:
1 off the rope accident
Accident off the rope is tied for lifting heavy objects from falling off the rope damage accident casualties occurred collapsing. The main reason causing the accident off the rope is tied heavy improper methods and essentials, causing heavy spondylolisthesis; lifting the inappropriate choice of the center of gravity, resulting in partial load lifting or lift hoist center due to instability caused by heavy objects falling; suspended load was collision, impact, vibration and swing, resulting in weight loss and so on.
2, decoupling accident
Decoupling accident is heavy, hoisting rope or a dedicated spreader hook hook from the mouth prolapse caused heavy loss incidents. The main reason for the accident was caused by decoupling the lack of retaining hook hook device; retaining hook protection device functional failure; improper methods and hook lifting hook mouth opening is too large deformation due to other reasons.
3, broken rope accident
Hoisting rope breaking caused the main reason for the overload lifting pull off multi-rope; starting position switch malfunctions ceiling pull off over winding rope; oblique hanging, causing chaos oblique cut rope rope crushing; Wire rope due to the lack of maintenance of long-term use cause fatigue deformation, wear damage, etc. to meet or exceed the standard still used scrap breaking caused the accident.
Causing the main hoisting rope breaking much more for the lifting angle> 120 degrees, so that the tensile strength exceeds the limit while hoisting rope pull off; hoisting rope inappropriate choice of varieties and specifications, or have reached retirement still using standard wire rope lifting heavy bundles cause hoisting rope breaking; hoisting rope and heavy with no gasket between the contact points and other protection measures, resulting in the emergence of angular cut rope hoisting rope breaking incidents.
4, hook breaking accident
Breaking hook hook fracture accident is an accident caused by weight loss. Cause of the accident caused by the breaking hook hook material mostly defective hook area reduction of long-term wear limit has been reached retirement standard but still used frequently overloaded or used, so that the damage caused by fatigue fracture failure.
Lost Hoist equipment accidents occurred mainly during the hoisting mechanism extracts winding system, in addition to rope off, decoupling, off the ropes and off the hook, but each hoisting rope fixed at both ends is also very important, such as wire rope on the drum limit can guarantee safety ring for more than 2 laps, whether a downward limit protection, wire rope on the drum unit wedge plate fixed and fixed structural safety and reasonable. Another rope off the tank (from the rope drum groove) or hoist and trolley off the wheel (from the pulley> Lost accident accident will occur.