When one end of the gondola’s working steel wire rope breaks, the suspended platform will tilt. Once it reaches a certain inclination, the safety lock will automatically engage, securing the platform to the safety wire rope. In such a situation, construction personnel inside the gondola should remain calm. It is strictly prohibited to run or jump inside the platform. Instead, follow the emergency measures outlined for when the working wire rope becomes jammed inside the hoist.
In the event of a sudden power failure, the power switch in the electrical box should be turned off immediately to prevent unexpected incidents when power is restored. Only after receiving confirmation that power has been restored should the power switch be turned back on. The system should be checked to ensure everything is functioning correctly before resuming work.
If a return to the ground is necessary after a power failure, the manual lowering handles on both hoist motors should be lifted simultaneously, allowing the suspended platform to descend freely to the ground.
If the gondola continues to ascend or descend after releasing the control button, the emergency stop switch on the electrical box must be pressed immediately to bring the platform to an emergency stop. Then, turn off the power switch in the electrical box and inspect the contactors for any issues. Clean off any grease or debris that may have accumulated on the contactor surfaces. If pressing the contactor manually restores normal function, turn the power back on and reset the emergency stop switch before resuming work.
If the issue persists, disconnect the power supply and use the manual descent method to lower the platform to the ground for further inspection and repair.
4. Safety Lock Operation
The safety lock should always be in an open position and set to automatic operation. Its primary function is to engage automatically if the lifting system fails and causes the gondola to descend at excessive speed. This locks the platform to the safety wire rope, preventing further descent and ensuring worker safety.
Once the issue has been resolved, the safety lock must be reopened. This should be done by first slightly lifting the gondola to release tension on the safety lock, then pulling the unlocking handle. It is strictly prohibited to force the safety lock open while the safety rope is taut, as this may damage the lock mechanism. Gainera, the platform should never be operated downward while the safety lock is engaged, as this could severely damage the hoist.
5. Wire Rope Jamming in the Hoist Due to Strands Unraveling, Kinking, or Hoist Component Failure
If the working steel wire rope gets jammed inside the hoist due to strand unraveling, kinking, or a hoist component failure, the hoist should be stopped immediately. It is strictly forbidden to repeatedly lift or lower the gondola to forcefully free the rope. To ensure safety, evacuate all personnel from the suspended platform and have a trained technician perform the necessary repairs.
First, wrap the safety steel wire rope around the mounting frame of both hoists and secure both ends with rope clamps. Then, release the protective rings of the safety lock’s pivot arms and detach the working wire rope from the rollers so that both safety locks engage and secure the platform.
With these precautions in place, remove the hoist for inspection and free the jammed wire rope. If necessary, cut the damaged wire rope and open the hoist casing for a thorough inspection. Carefully extract any remnants of the wire rope left inside the hoist.
Once repairs are completed, install a new wire rope in the appropriate position within the suspension system. Feed the new wire rope through the hoist and tension it properly. Then, place the working wire rope back into the safety lock’s pivot arm roller groove and reattach the protective ring. To unlock the safety lock, lift the suspended platform by approximately 0.5 metroak, then remove the clamps securing the safety wire rope and allow it to return to a freely hanging position. Finally, lower the gondola to the ground and conduct a comprehensive inspection and maintenance check on the hoist before resuming operation.
6. Emergency Procedures for Other Unforeseen Issues
Apart from the above-mentioned issues, additional unforeseen emergencies may arise during electric gondola operations. It is essential to establish a strict safety management system and ensure all personnel are well-trained in emergency response procedures.
General Guidelines for Emergency Situations:
Maintain Composure:In any emergency, workers should stay calm and avoid sudden movements that may worsen the situation.
Utilize Safety Equipment:Always ensure that safety harnesses are properly secured to independent lifelines.
Immediate Shutdown:If an abnormality is detected, stop operations immediately and assess the situation.
Emergency Evacuation:If a platform cannot be safely lowered, use alternative escape methods, such as an emergency descent device.
Seek Professional Assistance:Any unresolved mechanical or electrical issues should be handled by trained technicians.
7. Preventative Maintenance and Safety Measures
To minimize the risk of emergencies, regular maintenance and thorough inspections should be conducted on all gondola components, including:
Wire Ropes:Check for signs of wear, kinks, or broken strands, and replace them when necessary.
Safety Locks:Test their functionality to ensure they engage properly in an emergency.
Hoist Mechanisms:Inspect for any abnormalities in operation and lubricate as required.
Electrical System:Examine wiring connections, switches, and contactors for possible faults.
Load Tests:Periodically conduct load tests to verify the stability and functionality of the gondola system.
By implementing proper emergency response protocols and following strict maintenance routines, the safety of workers and the reliability of the electric gondola system can be significantly improved, reducing the risk of accidents during construction operations.
