Rope-driven rigid-flexible coupling master-slave nested folding type ecological breeding net cage

The invention discloses a rope-driven rigid-flexible coupling master-slave nested folding type ecological breeding net cage. The ecological breeding net cage comprises a nested folding and unfolding master-slave nested type net cage frame which has multiple nested folding and unfolding functions including master frame space folding and unfolding, longitudinal folding and unfolding and slave frameplanar folding and unfolding. The nested folding and unfolding master-slave nested type net cage frame comprises a master-slave framework and a net cage folding and unfolding driving mechanism. The master-slave framework comprises an upper-layer framework and a lower-layer framework which are threefold symmetric Bricard mechanisms identical in size and shape and parallel to each other. The net cage folding and unfolding driving mechanism comprises a center stand column, a sliding base, a driving rod and a closed-loop rope, the center stand column is connected with the master framework throughthe driving rod, the driving rod is connected with the two ends of the closed-loop rope, and the rope rotates the driving rod to achieve space folding and unfolding of the master framework; a steel wire rope is connected with the master framework, and a winch winds and unwinds the steel wire rope to achieve longitudinal folding and unfolding; slave framework planar folding and unfolding are achieved through flexible hinge folding and unfolding. The net cage is large in folding and unfolding ratio, and the defects that a net cage is large and inconvenient to transport are overcome; the structure is high in rigidity; the master-slave type net cage is designed to realize centralized breeding of multiple species, and the cost is low.