Quick assembly type protection device for pipeline welding

The invention relates to the technical field of pipeline welding, in particular to a quick assembly type protective device for pipeline welding, which comprises a protective shed, a plurality of guide units are mounted on the left side in the protective shed, a welding protective unit is mounted on the right side of the guide unit on the rightmost side, and a plurality of lifting units are mounted at the lower end of the protective shed; the protective shed can be quickly assembled together, when the distance between the next welding point of the pipeline and the current welding point is small, welding of the next welding point is conducted in the mode that the protective shed is pushed along the track of the pipeline, meanwhile, when the height of the pipeline changes, the height of the protective shed can be adjusted, and the welding efficiency is improved. And meanwhile, when the pipeline is welded, harmful gas generated in the pipeline welding process can be rapidly exhausted out of the protective shed, a