| 摘要 |
The drive device for a conduit inspection, treatment and maintenance apparatus consists of an elongate cylindrical body (10) from which project three rollers arranged on a common plane, two of said rollers (11, 12) being drive rollers in contact with a generatrix of the conduit, while the third (13) is placed in a box (14) mounted on springs (15) and is in contact with the generatrix diametrically opposite the previous generatrix, thereby holding the drive device in place inside the conduit. The drive device is provided with an electric motor (20) and can therefore drive, at variable speed and in both directions, one or more conduit maintenance modules. |
