Generally speaking, the daily inspection of portal crane should be carried out every day. This includes checking the main structural components of the crane, such as the main beam, outriggers, end beams, etc., to check whether there are cracks, deformation or loose signs; check the electrical system, such as control buttons, contactors, wires and cables, etc., to ensure that they are working properly without short circuits, circuit breaks, etc.; at the same time, check the lifting parts such as hooks, wire ropes, pulleys, etc. to check whether there are wear, broken wires, deformation, etc.
Weekly maintenance work needs to be more meticulous. In addition to the daily inspection items, it is also necessary to check the traveling mechanism of the crane, including wheels, tracks, reducers, etc., to ensure smooth walking, no abnormal noise and jamming; check and adjust the brakes to ensure reliable braking performance; clean the dust and debris of electrical equipment to facilitate heat dissipation and prevent short circuits.
The focus of monthly maintenance is on the lubrication of mechanical transmission parts. Add or replace lubricating oil to reducers, transmission shafts, gears, etc. to ensure good lubrication and reduce wear; check the lubrication of wire ropes and re-apply grease as needed; test the safety protection devices of the crane, such as limit switches, overload limiters, etc., to ensure their sensitivity and effectiveness.
Quarterly maintenance should include a comprehensive inspection of the electrical system. Measure the insulation resistance of the motor and check whether the wiring of the motor is firm; check whether the contacts of the contactor and relay are worn and replace them if necessary; perform a comprehensive anti-corrosion treatment on the steel structure and repaint it to prevent rust.
Semi-annual maintenance requires flaw detection of the main load-bearing parts of the crane, such as the main beam and outriggers, to promptly detect internal defects; check the wear of the wheels and replace them in time if they exceed the specified limit; measure and adjust the crane track to ensure that the flatness and gauge of the track meet the requirements.
Portal Crane needs to be overhauled and maintained once a year. In addition to the above inspections and maintenance work, it is also necessary to conduct a comprehensive inspection of the performance of the crane, including lifting capacity, operating speed, braking distance, etc., to ensure that it meets the design requirements; and to replace aging and damaged parts in full to ensure the reliability and safety of the crane.
It should be noted that the above maintenance cycle is only a rough reference, and the specific cycle should be appropriately adjusted according to factors such as the frequency of use of the crane, the working environment, and the load conditions. For example, the maintenance frequency of the Portal Crane working in a harsh environment should be increased accordingly; the inspection and maintenance of the key components of the crane operating at high load should also be more frequent.
In short, the reasonable formulation and strict implementation of the maintenance cycle of the Portal Crane are key measures to ensure its safe operation, extend its service life, and improve work efficiency.
