Marine Hatch Cover Gantry Crane

Bulk carriers experience significant structural sagging, hogging, and torsional flexing during loading and sea transit:Articulated Wheel Box Assemblies: Travel bogies incorporate spherical bearings and flexible equalizer joints, allowing individual wheels to adjust automatically to axial track misalignment up to $\pm 15\text{mm}$.Double-Flanged Wheels & Anti-Tip Guides: Features heavy-duty double-flanged forged steel wheels complemented by mechanical under-rail safety hooks, preventing track derailment or tipping during vessel heel and trim.

The choice depends on power availability and environmental tolerance: Electro-Hydraulic Drive: Offers high breakaway torque for lifting heavily iced or sealed hatch panels, smooth variable-speed hydraulic controls, and superior resistance to electrical short-circuits caused by saltwater spray. All-Electric VFD Drive: Ideal for modern green vessels requiring zero oil-leakage risks over open cargo holds, lower standby power consumption, and direct integration with automated shipboard control systems.

To survive violent vessel rolling ($>30^\circ$) and heavy sea-sloshing during ocean crossings:Mechanical Storm Pins: Heavy-duty stainless steel locking pins manually or hydraulically engage into designated deck-welded storm sockets when the crane is parked in its sea stowing position.Automatic Rail Clamps & Fail-Safe Brakes: Spring-applied, pressure-released hydraulic disc brakes instantly lock the wheels upon power cutoff, while storm rail clamps provide secondary friction clamping against high wind loads.IACS Class Certification: Fully designed and tested under major IACS rules (DNV, ABS, BV, ClassNK, CCS) including static/dynamic overload tests up to 12