In-pipe crawling device

The utility model provides an in-pipe crawling device. The in-pipe crawling device comprises a machine body, a spraying pipe, a pushing device and two umbrella rib structures; the umbrella rib structure comprises a supporting frame, umbrella ribs, telescopic pieces and pulleys. One ends of the umbrella ribs are rotatably connected with the supporting frames, the pulleys are arranged at the other ends of the umbrella ribs, one ends of the telescopic pieces are connected with rib bodies of the umbrella ribs, and the other ends of the telescopic pieces are rotatably connected with the oppositely-arranged supporting frames. The pushing device comprises a pushing rod, a limiting piece, an elastic piece, a first induction piece and a second induction piece. One end of the pushing rod is connected with one supporting frame, the limiting piece penetrates through the other supporting frame and is connected with the other end of the pushing rod, the elastic piece is arranged between the limitingpiece and the supporting