In-situ turning mechanism of single-arm bridge girder erection machine

The utility model discloses an in-situ turning mechanism of a single-arm bridge girder erection machine, and relates to the technical field of bridge construction, the in-situ turning mechanism comprises a base, a power assembly is arranged on the upper surface of the base, a rotating assembly is rotatably connected to the upper surface of the base, a plug pin is inserted into the side edge of the rotating assembly, and a moving groove is formed in the upper surface of the base; the power assembly comprises a hydraulic cylinder, an inner cavity of the hydraulic cylinder is slidably connected with a piston rod, the end, away from the hydraulic cylinder, of the piston rod is fixedly sleeved with a connector, an insertion hole is formed in the upper surface of the connector, and a limiting rod is fixedly installed on the lower surface of the connector. Under the condition that the bridge erecting machine is not disassembled, the bridge erecting machine can be turned around in situ through the power assembly, the