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US 4,216,893 AGranted
Apparatus for remotely repairing tubes in a steam generator
AssigneeWestinghouse Electric Corp.
InventorRaymond H. Glatthorn
Life of this patent
Estimating the term…
Abstract
Apparatus that is assembled quickly inside a channel head of a steam generator and is capable of performing various repair and inspection techniques remotely in order to reduce radiation exposure and facilitate rapid repair of the tubes.
Claims9
Apparatus for remotely repairing tubes disposed in a tube sheet in a channel head of a steam generator having a manway disposed in said head, said apparatus comprising:
- a column rotatably disposed in said head generally perpendicular to said tube sheet;
- a boom pivotally mounted on said column;
- means for rotating said column and said boom therewith;
- means for pivoting said boom from a position generally parallel to said tube sheet to a position generally aligned with said manway;
- a carriage disposed to ride lengthwise along said boom;
- means for moving said carriage lengthwise along said boom and for affixing the position of said carriage on said boom;
- a tool operative on a tube;
- a tool holder pivotally disposed on said carriage so as to axially align said tool with the axis of a tube and to allow rotation of the tool and tool holder so that they fit through the manway;
- means for moving the tool rectilinearly, said means being disposed on said tool holder whereby said apparatus will perform repair operation on said tubes;
- and
- an extension for said boom whereby, when connected thereto, said carriage can be driven through said manway.
8 more elements
Apparatus for remotely repairing tubes disposed in a tube sheet in a channel head of a steam generator having a manway disposed in said head, said apparatus comprising:
- a column rotatably disposed in said head generally perpendicular to said tube sheet;
- a boom pivotally mounted on said column;
- means for rotating said column and said boom therewith;
- means for pivoting said boom from a position generally parallel to said tube sheet to a position generally aligned with said manway;
- a carriage disposed to ride lengthwise along said boom;
- a tool operative on a tube;
- a tool holder pivotally disposed on said carriage so as to axially align said tool with the axis of a tube and to allow rotation of the tool and tool holder so that they fit through the manway;
- means for moving said tool axially;
- and
- two pairs of cylinders cooperatively associated with two clamps, one cylinder in each pair operating the associated clamp to clamp said boom or release it and the other cylinder in each pair being utilized to move said carriage with respect to the associated clamp, whereby said carriage is affixed to or moved along said boom.
7 more elements
Dependencies are inferred from the claim text.