| 摘要 |
A utility tower lifting apparatus and method for raising a lattice tower in addition to carried transmission cables without disturbing the tower foundation, disconnecting the cables, or requiring de-energization of the transmission lines. The present application discloses a lifting device with upper and lower sections that are attached respectively to upper and lower sections of tower with a hydraulic cylinder to lift the sections apart. In particular the present application discloses an electrical or communication transmission tower lifting device for elevating an upper portion of the electrical transmission tower with respect to a lower portion of the tower from a first elevation to a second elevation, the lifting device comprising: a lower lifting structure, an upper lifting structure, and a lifting cylinder a controller that is configured to control the movement of the lifting cylinder to raise the upper portion of the tower. |
