Inspection of gantry crane equipment

Gantry cranes are often used in industrial production, of which gantry cranes are the majority, so more attention should be paid to the inspection of gantry crane equipment and the inspection of protective grounding to ensure the integrity and safety of the equipment.

For the inspection of gantry cranes, it is necessary not only to master the standard inspection methods, but also to take specific inspection methods according to the specific inspection contents and environmental factors. Only in this way can the inspection level be improved. The inspection of the gantry crane includes two parts: inspection of the mechanical part and inspection of the electrical part. Among them, the inspection methods of mechanical parts are various, including the detection of the upper middle crown of the main beam and the local warpage of the web of the main beam.

The inspection method of the upper middle crown of the main beam of the gantry crane is to level the main beam from the bolster, and the height of the upper cover at both ends of the seat plate is ≤ 2 mm. If it is a double girder structure, the bolster should be placed directly below the main girder plate; if it is a single main girder structure, place the support beam centerline 700 mm outside the main girder plate.

In addition, it is a check of the protective grounding of the gantry crane. On the one hand, it is necessary to check whether the metal structure of the tower gantry crane is well connected to the electrical equipment casing; on the other hand, check the grounding of the neutral wire repeatedly. If the grounding resistance is ≤10, buried ground can be used. The tower should be grounded repeatedly, otherwise a separate grounding body should be provided for repeated grounding.

Not only that, but also check the total current loop of the suspension tower with or without short circuit protection device, select whether the setting meets the requirements, record the rated current of the fuse or the circuit breaker action setting current; Calculate or quantitatively test the phase zero loop impedance and calculate the single phase short circuit Current.