Pipeline splicing part cleaning device

The utility model provides a pipeline splicing part cleaning device which comprises an outer ring sleeve, the outer ring sleeve is rotatably connected with a round cover, the outer ring of the outer ring sleeve is fixedly connected with symmetrically arranged cleaning structures, one side of the round cover is fixedly connected with the outer edge of one end of an adjusting structure, and the other side of the round cover is provided with a limiting groove. The limiting groove is slidably connected with the expansion rod, one end of the expansion rod makes contact with the inner wall of the spraying winding heat preservation pipe, the other end of the expansion rod is slidably connected with a spiral groove formed in one side of the circular plate, the first screw rotates and moves in the threaded sleeve, so that the circular plate rotates, and the spiral groove in one side of the circular plate drives the arc-shaped strip block to slide; and meanwhile, a sliding column connected with an arc-shaped strip bloc