| 摘要 |
A pipeline gauging vehicle has two resilient driving cups 2 and 3 arranged to contact the interior surface 4 of the pipeline 6 to create a pressure differential which will propel the vehicle along the pipeline. A plurality of first monitoring arrangements 8, each consisting of six detecting elements 9 located at circumferentially spaced positions, are axially spaced on a support structure 1, their orientation being commensurate with a minimum radius of curvature of bends in the pipeline which the vehicle needs to negotiate. A plurality of second monitoring arrangements 14 axially spaced on the support structure 1 have detecting tabs 18 radially spaced from the longitudinal axis 20 of the vehicle by a distance commensurate with a desired minimum radial clearance are arranged to provide an indication when the minimum clearance is exceeded. The vehicle can monitor pipelines having complex three dimensional geometry involving a succession of bends in different directions. |
