Addressing the enclosure methods for belt conveyors in dry bulk ship loading and unloading terminals,this study analyzes the applicability of existing enclosure solutions based on typical conveyor layouts.The results indicate that conventional solutions,such as fully enclosed cover belts and enclosed galleries,are often constrained by complex equipment structures when belt conveyors are arranged between the rails of loading and unloading equipment,making it difficult to simultaneously ensure enclosure effectiveness and operational reliability.To address these issues,a novel dynamic enclosure system for quay belt conveyors is proposed.The system distinguishes the loaded section from the unloaded section of the belt conveyor and applies enclosure only to the loaded section.A belt winding device is adopted to realize dynamic winding and releasing of the cover belt in synchronization with the movement of loading and unloading equipment.Based on different layout conditions of ship loaders and unloaders,the working principle,structural configuration and engineering applicability of the proposed system are analyzed.The results indicate that this solution is suitable for bulk cargo loading and unloading terminals where the belt conveyors are positioned between the two tracks of loading and unloading equipment,and it is feasible for engineering promotion and application.