Welding jig capable of guaranteeing coaxiality of heating pipe shell

The utility model discloses a welding jig capable of guaranteeing the coaxiality of a heating pipe shell. The welding jig comprises a manual rotating tool and a welding tool arranged on the manual rotating tool. The shell needing to be welded is installed on the welding tool, so that when the shell is welded, the welding position of a worker can be adjusted through manual rotation, welding of the worker is more accurate, and meanwhile repair welding of the worker is facilitated. 本实用新型公开了一种保证加热管外壳同轴度的焊接治具，包括手动旋转工装，置于手动旋转工装上的焊接工装。需要焊接的外壳安装在焊接工装上，因此当焊接外壳时，可以通过手动旋转调整工作人员焊接的地方，从而使得工作人员焊接更精确，同时便于工作人员补焊。