Maintenance and Protection of Bridge Cranes

To ensure the long-term stability and safe operation of bridge cranes, and to enhance the equipment's safety and lifespan, regular maintenance and protection are necessary. Here are the main maintenance and protection measures for bridge cranes:

1. Daily Inspection and Maintenance

   • Steel Structure Check: Inspect the main beams, legs, and end beams for cracks, deformations, or welding issues.
   • Connection Parts: Tighten all bolts and pins, checking for looseness or abnormal wear.
   • Wire Ropes: Inspect the wire ropes for broken strands, wear, corrosion, or deformation. Replace damaged ropes immediately.
   • Pulley and Drum Check: Inspect pulleys and drums for wear or cracks, lubricate the pulley bearings to ensure smooth operation.
   • Hook Check: Inspect the hook for cracks, deformations, or wear, ensuring smooth rotation.

2. Electrical System Maintenance

   • Motor and Control System: Regularly check motors, brakes, and contactors, clean dust to prevent short circuits.
   • Cables and Wires: Check cables for aging, damage, or poor contact, ensuring good insulation.
   • Limit and Safety Devices: Check if the lifting and running limit switches work properly to prevent overload operation.

3. Lubrication and Corrosion Prevention

   • Lubrication System: Add or replace lubricating oils and greases for moving components such as gears, bearings, and wire ropes at regular intervals to reduce wear.
   • Corrosion Protection: Regularly check the paint on the equipment to prevent rusting. For cranes working in high humidity or corrosive environments, strengthen the protective coating.

4. Track and Operation Mechanism Maintenance

   • Track Inspection: Check the tracks for deformations, cracks, or wear, and keep the track surface clean for smooth operation.
   • Wheel Check: Inspect the wheel treads for wear or cracks, ensuring good contact between wheels and tracks.

5. Regular Testing and Professional Maintenance

   • Conduct a comprehensive inspection of the crane periodically to ensure it meets safety standards.
   • Perform an annual load test to ensure the equipment meets the rated load capacity.
   • Repair any faults immediately and do not operate the crane when defects are present.

By following these scientific maintenance and protection measures, the failure rate of the bridge crane can be effectively reduced, increasing work efficiency and ensuring safe operations.