The utility model provides an inner blowing device of straight seam steel
pipe, including base, the top of base is connected with first support board, the top of base is seted up with sliding chamber, install linear moving
assembly in sliding chamber, linear moving
assembly is used for driving first support board removal, one side wall of first support board is connected with second support board, and the upper side fixed mounting of one side wall of second support board has swivel joint, and the outer end fixed communication of swivel joint has inner blowing
pipe, and the outer end of inner blowing
pipe is seted up with a plurality of even distribution's air hole, and the other side wall of second support board is fixed with
gas supply pipe in the through -type, and
gas supply pipe and swivel joint intercommunication, and drive
assembly is connected on inner blowing pipe. The utility model discloses through the
servo motor of drive assembly drive driving gear to rotate, to drive driven gear to rotate, to can realize drive inner blowing pipe to rotate, to make the gas exported from air hole can even act on the inner wall of steel pipe, to be favorable to the effect of blowing and purging.