System and method for removal of dents from wind turbine masts
A system and method for removal of dents from wind turbine masts uses a dent pushing tool. The dent pushing tool includes a self aligning ram assembly with a central ram cylinder and removable adjustable length arms. At the end of one arm is a curved base. At the end of the other arm is a dent pusher plate. Removal of the dent is caused by extension of the central ram cylinder.
1. A device for pushing out a dent in a substantially circular hollow metal structural support column from within said hollow metal structural support column, said device comprising:
a self aligning ram assembly, said self-aligning ram assembly including:
a central ram cylinder;
a first and second adjustable length arm extending outwardly from said central ram, said adjustability being effected by the use of inserts at the end of or within said adjustable length arms;
a curved base attached to the outboard end of said first adjustable length arm;
a pusher plate attached to the outboard end of said second adjustable length arm;
wherein said pusher plate is constructed and arranged for placement against the dent, said curved base is constructed and arranged for placement on the inside wall of the structural support column opposite from the dent and the first and second adjustable length arms are substantially aligned with the diameter of the substantially circular hollow metal support column.
2. The device as defined in claim 1 wherein said central ram is an air over hydraulic ram.
3. The device as defined in claim 1 wherein said central ram is an electric over hydraulic ram.
4. The device as defined in claim 2 wherein the operation of the ram is governed by a remote controller.
5. The device as defined in claim 3 wherein the operation of the ram is governed by a remote controller.
6. The device as defined in claim 1 wherein the curved base is substantially arcuate and is formed from a metal which is more flexible than the metal wall of the substantially hollow metal support column.
7. The device as defined in claim 1 wherein the pusher plate is shaped according the shape and orientation of the dent in the wall of the substantially hollow metal structural support column.
8. The device as defined in claim 1 wherein the said first and second adjustable length arms are removable from said central ram.