Most of the occurrence of many lifting accidents are because of lifting overloaded objects, resulting in crane dumping, in order to prevent the occurrence of accidents, gantry crane before leaving the factory will be installed overload limiter, overload limiter to meet the specific technical requirements to effectively prevent the occurrence of accidents. The following for everyone to explain the technical requirements of lifting limiter!
After the gantry crane is set with overload limiter, it should be adjusted or calibrated according to its performance and precision. When the lifting weight exceeds the rated lifting weight, it can automatically cut off the lifting power source and send out a restraining alarm signal. Bridge type crane, railway crane, portal crane, should be equipped with overload limiter; Tower cranes, elevators and electric hoists can also be installed according to actual needs. The combined error of mechanical overload limiter should not be greater than 8%, and that of electronic overload limiter should not be greater than 5%. When the load reaches 90% of the rated lifting weight, it should be able to send out warning signal.