The invention discloses a complex pipeline moving rat which solves the problem that a moving device in a pipeline can not effectively pass through a complex pipeline and
climb a vertical pipeline. The complex pipeline moving rat comprises a
retainer and a driving body which are assembled in a
pipe wall and is technically characterized in that the
retainer and the driving body are assembled on a same main shaft; two motor driving bodies of the driving body are respectively symmetrically hinged between a connecting base of the main shaft and a slide block of the driving body through a link mechanism so that a driving wheel is tensioned in the
pipe wall; the motor driving bodies are provided with a DC driving motor and a DC steering motor; and a four-bar mechanism of the
retainer, which is provided with a supporting wheel, is hinged between the connecting base of the main shaft and the slide block of the retainer so that the supporting wheel is tensioned in the
pipe wall. The invention has reasonable structural design, easy operation, flexible work, stability and reliability, not only can meet the requirement of round pipeline reducing, but also can move in a square pipeline and can
climb the vertical pipeline, thereby achieving the aim of moving a self-adaptive pipeline which is compositely driven in complex pipelines, such as a T type pipeline, an L type pipeline or U type pipeline, and the like.