To ensure the safe operation of harbour portal crane, comprehensive measures are needed from multiple aspects such as the equipment itself, personnel operation, and maintenance management:
1. Equipment
Precision installation and commissioning: The quality of track foundation construction must be strictly controlled to ensure sufficient bearing capacity and reinforcement treatment should be done according to geological conditions to prevent track sinking or deformation. When laying the track, the horizontal and gauge deviations should be controlled within a very small range, such as the horizontal deviation does not exceed ±5 mm, and the gauge deviation is within ±3 mm, to ensure the smooth operation of the trolley and avoid gnawing the rails. The installation of structural parts such as portals and bridges must be carried out according to process standards to ensure that the tightening torque of the connecting bolts meets the standards, the quality of the welds is reliable, and the coaxiality, verticality, and other accuracies of each operating mechanism meet the requirements to prevent eccentric wear or uneven force on the parts.
Complete safety devices: Equipped with complete and reliable safety devices, such as lifting height limiter to prevent the hook from hitting the top; travel limit switch to limit the operating range of large and small cars; overload limiter to avoid danger caused by overload operation; buffer to reduce impact force in case of accidental collision. These safety devices should be inspected and calibrated regularly to ensure that they are always in good working condition and can play a timely and effective role in safety protection.
2. Personnel operation
Qualification and training in place: Operators must undergo professional training, obtain relevant qualification certificates, and be familiar with the structure, performance, operation methods, and safety regulations of the crane. Regularly organize retraining and assessments to continuously improve their operating skills and emergency handling capabilities so that they can deal with various operating conditions and emergencies proficiently.
Strict implementation of operating specifications: Operators must strictly abide by the operating procedures during the operation, carefully check the equipment status before operation, and operate after confirming that there is no error. When lifting goods, accurately grasp the weight of the goods, do not exceed the rated lifting weight, lift and operate smoothly, and avoid sudden stops and starts, and large swings. Pay attention to the surrounding environment when moving large and small cars to prevent collisions.
3. Maintenance and management
Daily maintenance is meticulous: lubricate mechanical parts regularly, check the wear and breakage of wire ropes, replace wire ropes that have reached scrap standards in time, pay attention to the wear and deformation of hooks, pulleys, and other parts, and repair or replace them. For the electrical system, clean the dust in the control cabinet, check the line connection and insulation, test the performance of key electrical equipment, and ensure the stable operation of the system.
Sound management system: establish a sound safety management system, clarify the safety responsibilities of various departments and personnel, strengthen on-site safety supervision, promptly discover and correct violations, promptly rectify safety hazards, form an effective safety management closed loop, and ensure the safe and efficient operation of the crane.
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