Lifting device for rigid hinges and large components

The utility model discloses a lifting device for rigid hinges and large components, belongs to the field of bridge construction devices and discloses a lifting device for the rigid hinges and the large components of different lifting tools of bridge floor cranes. The lifting device comprises bridge floor crane winches, wherein each bridge floor crane winch comprises a steering fixed pulley and connecting fixed pulleys, a top fixed pulley group and a moving pulley group which are connected through a steel wire rope, and ends of the two steel wire ropes of the bridge floor crane winches are connected in series through the steering fixed pulleys on the bridge floor crane winches. By the aid of the lifting device, the problems that postures in the air are difficult to control and the stress exerted on a single lifting point exceeds the limit easily when the bridge floor cranes are used for lifting the rigid hinges, steel box girders or large structures are solved, and lifting risks and the operation difficulty are reduced.