DEEP-WATER HEAVY-DUTY WINCH SYSTEM

The utility model provides a deepwater heavy-load winch system. The system comprises a cable storage winch, a traction winch, a pulley system and a multi-stage hydraulic A frame, wherein the pulley system is hoisted below a cross beam of the multi-stage hydraulic A frame; after extending out of the cable storage winch, a cable is wound around the traction winch and the pulley system and droops from the middle of the multi-stage hydraulic A frame, and the tail end of the cable is connected with a heavy object containing part; along with rotation of a winding drum of the traction winch, on one hand, lifting and sinking of a heavy object are achieved through winding and unwinding of a cable, and on the other hand, the cable storage winch is matched with rotation of the traction winch to tighten or release the cable. The cable is a synthetic fiber cable. The scheme that a traditional heavy-load winch system uses a steel cable is broken through, the high-performance synthetic fiber cable is adopted, the hoisting capacity close to full load is always achieved from water entry to the maximum depth, and the problem that the traditional steel cable is limited to treat heavy loads in a deep water area is solved.