Cantilever supporting device for inner spraying of steel pipe

The utility model discloses a cantilever supporting device for inner spraying of a steel pipe. The cantilever supporting device comprises a base, a guide roller, a walking trolley, an adjusting mechanism and a spraying rod. Guide rollers are mounted at the top of the head end of the base and used for driving steel pipes to rotate; the walking trolley is arranged at the tail end of the base, a supporting plate is installed at the top end of the walking trolley, an adjusting mechanism is installed on the supporting plate, the output end of the adjusting mechanism is connected with the tail end of the spraying rod, and the head end of the spraying rod extends into the steel pipe and is provided with a nozzle; the head end diameter of the spraying rod is smaller than the tail end diameter of the spraying rod. The spraying device is simple in structure, convenient to use and capable of greatly improving the spraying uniformity of the inner wall of the steel pipe. 本实用新型公开了一种钢管内喷涂悬臂支撑装置，包括底座、导辊、行走小车、调节机构和喷涂杆；底座首端的顶部