QC Double Girder Overhead Crane with Electromagnet

The QC Double Girder Overhead Crane with Electromagnet is a purpose-built lifting solution for handling steel products, steel plates, steel pipes, and other ferrous materials without the need for mechanical slings or rigging. The crane uses an electromagnetic spreader — either an electromagnetic chuck or an electromagnetic beam — to attract and hold the load magnetically, significantly reducing the time and labour required for each lift cycle. The electromagnetic suction force is retained for up to 10 minutes after power is cut, providing a safety buffer against accidental power interruptions during the lift. The electromagnetic spreader can be customised to match the shape and dimensions of the materials being handled, covering round, flat, and tubular steel profiles. Two types of electromagnetic spreader are available. The electromagnetic chuck is a circular disc-type magnet suited to flat steel plate and sheet handling. The electromagnetic beam is a linear spreader available in two configurations: a non-rotating beam (aligned vertically or parallel to the main girder) for straightforward plate and section lifting, and a rotating beam for applications requiring the load to be turned or repositioned during the lift. The crane's box-section double girder structure is robot-welded in high-strength steel across spans from 10.5 to 31.5 metres. Wheels, winding drums, gears, and couplings are precision-machined on CNC equipment. Lifting motors are heavy-duty slip ring units from Wuxi NGP, and all main electrical components are sourced from Siemens Germany. The working duty classification is A6, suited to intensive steel handling operations. Control is by wireless remote or operator cab, with three cab entry directions available — end, side, or top — to suit different workshop layouts.

Steel mills and rolling plants: The QC crane handles hot-rolled and cold-rolled steel coils, plates, and structural sections throughout the production and storage process. The electromagnetic beam spreader allows long steel sections to be lifted evenly across their full length without point loading, reducing the risk of deformation during handling. Metal recycling and scrap processing: Electromagnetic chuck spreaders are standard equipment in scrap metal yards, where loose steel offcuts, punchings, and scrap sections need to be moved in bulk. The MW-16 electromagnetic disk used in this crane achieves attracting weights up to 14,330 kg, covering a wide range of scrap densities and profiles. Shipbuilding workshops: Ship hull construction involves handling large steel plate panels and prefabricated structural sections. The QC crane's electromagnetic spreader eliminates the rigging time associated with sling-based lifts, improving throughput in the pre-fabrication bay and reducing surface damage to prepared steel plates. Mechanical fabrication workshops: Workshops cutting, bending, or welding heavy steel plate benefit from the QC crane's ability to pick up and reposition plates quickly without attaching and detaching sling chains at every move. The 10-minute residual hold time after power interruption provides a safety margin during repositioning. Port and cargo handling: Steel plate cargo and structural steel shipments arriving at port require efficient discharge and sorting. The electromagnetic spreader handles mixed plate sizes and thicknesses without re-rigging between lifts, improving discharge rates compared to hook-and-sling operations.