How to operate the lifting mechanism of gantry crane?
ZZHZ has very experience of producing gantry crane, so it can give some advice to us:
1. The trial lift of low distance must be done before every lifting, in order to check the capability of brake. If necessary, the operator can adjust gap of brake block to meet the requirements of lifting.
2. Using with overload is prohibited in any situation.
3. There should have the steps which prevent the strands from
dispersing when the steel ropes break.
4. When installing the steel rope which should be pulled and constructed in the clear area. Scratch, grinding, roller compact and overbending should be avoided. The steel rope should keep good lubricating; the new lubricant should meet the requirements of steel rope. The worker should pay attention to the parts which doesn't see and touch easily when lubricating gantry crane, for example, balancing wheel.
5. When the old steel ropes are replaced, the worker should make sure the working channel of pulley and drum don't wear down. If they do, the channel of pulley should be repaired. Checking the bearing and casing are damaged or not, and making sure the pulley can travel freely which don't have too much deviation.
6. When the drum is winded by steel rope, the first layer should
Lean against each other compactly and pull closely to keep the minimum pull of steel rope until winded completely.
7. The steel rope should be checked every day and making the adjustment about safety, such as fixed connection of end and balancing wheel;
8. The safe cycle of steel rope on the drum should exceed 3.
9. Gantry crane lifts box girder with heavy load in order to prevent the girder from deviating longitudinally and transversely, the maximum skew angle shouldn't exceed 2.
