Mechanism capable of walking in rectangular air pipe

The invention discloses a mechanism capable of walking in a rectangular air pipe. The mechanism capable of walking in the rectangular air duct comprises a base plate, L-shaped connecting seats are arranged on the left side face and the right side face of the base plate correspondingly, a first rotating motor and a second rotating motor are installed on the L-shaped connecting seats on the left side and the right side correspondingly, the output end of the first rotating motor and the output end of the second rotating motor are connected with a first lead screw sliding block pair and a second lead screw sliding block pair respectively, the lower end face of the first lead screw sliding block pair and the lower end face of the second lead screw sliding block pair are both connected with rotating connecting seats, a third rotating motor and a fourth rotating motor are installed in the interiors of the rotating connecting seats on the left side and the right side correspondingly, the output end of the third rotat