Pneumatic device integrating rust removal, detection and measurement of inner wall of pipe

The utility model discloses a pneumatic device integrating rust removal, detection and measurement of the inner wall of a pipe. The pneumatic device comprises an electronic detection part, a pneumatic cleaning part and a pneumatic crawling part which are sequentially connected from top to bottom. The electronic detection part comprises a high-definition camera which is arranged on the end face of the top end of the shell and is provided with an LED lamp, a length detection roller group which is arranged on the side wall of the top of the shell and is based on electromagnetic induction, and an integrated electronic module, a rechargeable battery pack and a power generation device which are arranged in an inner cavity of the shell; the movable cleaning part comprises an outer cylinder body, spiral bristles and a pneumatic rotation driving mechanism; the pneumatic crawling part can crawl in a pipeline by utilizing a high-pressure air source, or is converted into a passage for connecting the high-pressure air sou