Ray detection device for steam generator adapter tube weld joint

The utility model provides a ray detection device for a steam generator adapter tube weld joint. The detection device comprises a mounting plate used for being mounted on a manhole, an axial radioactive source positioning mechanism used for being arranged in an adapter tube, and a guide source tube connected with the mounting plate and the axial radioactive source positioning mechanism, wherein a reel mechanism is assembled on the mounting plate; a pulling rope is wound on the reel mechanism; multiple guide rings sleeve the guide source tube; the pulling rope penetrates through the guide rings and is connected with the axial radioactive source positioning mechanism; the axial radioactive source positioning mechanism comprises a radioactive source clamping pipe which is arranged at the tail end of the guide source tube in a sliding mode; a radioactive source is assembled at the end of the radioactive source clamping pipe. The ray detection device for the steam generator adapter tube weld joint can repeatedly d