Research on the sealing structure of the plug near launcher & receiver

Plugging technology near launcher & receiver, which is used to replace the section of pipeline near launcher & receiver or block valve, refers to put plugging head into the specified location from launcher & receiver by the push rod to complete pipeline sealing operation. The sealing rubber tube structure is the key component of the plugs near launcher & receiver, which relates to the sealing reliability and operation safety. This paper has established the mathematical model between the contact pressure and the extrusion force of the sealing rubber tube, and concluded the functional relationship between the axial compression force of rubber tube and radial deformation. We use Matlab software to simulate the changing law of the contact pressure and the diameter of the rubber tube, and get the design size of the sealing rubber tube. We also analyze the sealing rubber material parameters, which affects the performance of dynamic sealing, by the finite element. The research provides the necessary theoretical basis and technical reference for the near launcher & receiver plugging operation.