Motion Law and Mechanical Properties of PIGs When Passing through a Pipe Bend

Pipeline inspection gauges (PIGs), as a kind of pipeline robot, are very efficient tools for cleaning and inspecting pipelines. However, the occurrence obstructions in PIGs has always been problem. The main cause PIG clogging problem is reduced pressure differential between front rear due to damage cup. In this paper, rigid-flexible coupled multibody dynamic motion system established by importing flexible bodies. stress contact force generated elastic deformation cup pipe analyzed. Moreover, spacing ratio cups number were changed, cabin sections was increased, bending different sizes specifications studied, influence cross-universal joint on PIGs, well core tube, Through design construction corresponding experimental equipment, change leather cornering studied.