Welding device for improving pipeline of desilicication machine

The utility model relates to the technical field of pipeline welding, in particular to a welding device for improving a desiliconization machine pipeline, which is provided with an in-pipe welding mechanism, so that the pipeline needing to be rectified can be conveniently welded from the inside of the pipeline, the welding firmness is ensured, the splicing attractiveness of the pipeline is improved, and the use practicability is improved; comprising a bottom plate, an in-pipe welding mechanism and a fine adjustment mechanism, the in-pipe welding mechanism is fixedly installed on the bottom plate, and the fine adjustment mechanism is fixedly installed on the in-pipe welding mechanism; the in-pipe welding mechanism comprises an air cylinder supporting plate, first air cylinders, main pushing air cylinder rods, an adjusting disc, a rotating motor, a welding head fixing block, a welding head and a pipeline supporting plate, the air cylinder supporting plate is fixedly installed on the bottom plate, the two first