Oxygen pipeline fixed-point butt joint marking device

The utility model discloses an oxygen pipeline fixed point butt joint marking device, relates to marking device technical field, including adjusting box and positioning mechanism, the positioning mechanism includes the rotating rod that rotatablely sets up in adjusting box inner wall, the one end of rotating rod is fixedly connected with elliptical disk, the outer surface of elliptical disk is hinged with two connecting rod, and the connecting rod is connected with the rotating rod. And two guide rails are fixedly connected to the inner wall of the adjusting box. According to the device, the positioning mechanism and the limiting mechanism are matched with each other, when the worm is rotated, the two positioning plates can move close to each other or away from each other, and therefore the device can be clamped and fixed to the surfaces of the positioning butt joint positions of oxygen pipelines of different sizes, the use range of the device is widened, and the practicability of the device is improved. And