초록

A remotely controlled tool for working inside a steam generator hemispherical head on tubes and tube holes and moving along orthogonal x and y axes to conform to the tube layout pattern in the tubesheet.

대표청구항 ▼

Apparatus for remotely working on tubes and holes in a tubesheet of a steam generator head, said apparatus comprising: a first set of rails affixed to said head so as to be generally parallel to said tubesheet; a second set of rails disposed between said tubesheet and said first set of rails and gen

Apparatus for remotely working on tubes and holes in a tubesheet of a steam generator head, said apparatus comprising: a first set of rails affixed to said head so as to be generally parallel to said tubesheet; a second set of rails disposed between said tubesheet and said first set of rails and generally parallel to said tubesheet; said second set of rails being slidably disposed on said first set of rails; a carriage slidably disposed on said second set of rails; a turret pivotally mounted on said carriage and having a tool holding and driving means detachably mounted on at least one end of said turret; means for moving said carriage longitudinally along said second set of rails; means for moving said second set of rails longitudinally along said first set of rails; means for rotating said turret with respect to said carriage; at least one tool mounted on said tool holding and driving means; means for rotating said tool and for advancing it into a tube hole being disposed in said tool holding and driving means; a pair of rods detachably connected to said turret and slidably attached to said tool driving and holding means; means for releasing said tool driving and holding means from said turret; and means for moving said tool driving and holding means along said pair of rods to facilitate changing said tool in said tool driving and holding means; whereby said tool can operate on every tube hole in the tubesheet.