Swivel device for bridge swivel construction

The utility model relates to the technical field of bridge construction, in particular to a swivel device for bridge swivel construction, which comprises a fixed base and a placement plate, the fixed base is connected with the placement plate through a plurality of hydraulic cylinders, and a spherical hinge rotator is arranged at the top of the placement plate. Movable plates are longitudinally and slidably arranged at the positions, corresponding to the hydraulic cylinders, of the outer surface of the placement plate, trigger assemblies are arranged at the positions, corresponding to the movable plates, of the outer surface of the fixed base, each trigger assembly comprises a fixed plate, and fixed plates are fixedly arranged at the positions, corresponding to the movable plates, of the outer surface of the fixed base. The device has the advantages that by arranging the movable plate and the trigger assembly, when a bridge rotates and the mounting plate and the spherical hinge rotating body incline or move d