Regenerative laying pipe
AssigneeMorgan Construction Company
InventorsKeith Fiorucci, Christopher Lashua
Life of this patent
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Abstract
A laying pipe configured for rotation about its axis in a rolling mill laying head, comprises a ferrous outer tube having an entry section aligned with its axis, an intermediate section curving away from its axis, and a delivery section having a constant radius measured from its axis. A ferrous inner tube has entry, intermediate and delivery sections respectively lining the entry, intermediate and delivery sections of the outer tube. The inner tube is constrained against movement relative to the outer tube solely by frictional contact with the outer tube. The inner tube is movable incrementally within the outer tube in one direction in response to heating and cooling cycles during rotation of the laying pipe about its axis.
Claims3
A laying pipe configured for rotation about an axis in a rolling mill laying head, said laying pipe comprising:
- a ferrous outer tube having an entry section aligned with said axis, an intermediate section curving away from said axis, and a delivery section having a constant radius measured from said axis;
- a ferrous inner tube having entry, intermediate and delivery sections respectively lining the entry, intermediate and delivery sections of said outer tube, said inner tube being constrained against movement relative to said outer tube solely by frictional contact with said outer tube, said inner tube being movable incrementally within said outer tube in one direction in response to heating and cooling cycles during rotation of said laying pipe about said axis.
For use with a laying pipe configured for rotation about an axis and through which a hot rolled product is directed for formation into a helical series of rings, a method of periodically changing the interior pipe surface exposed to localized accelerated wear resulting from frictional contact with said product, said method comprising:
- constructing the laying pipe as an assembly of a ferrous outer tube lined with a ferrous inner tube, with said inner tube being constrained against movement within said outer tube solely by frictional contact with said outer tube, said laying pipe having an entry section aligned with said axis, an intermediate section curving away from said axis, and a delivery section having a constant radius measured from said axis;
- rotating said laying pipe about said axis while simultaneously directing the hot rolled product through said inner tube;
- and
- incrementally advancing said inner tube within said outer tube by periodically subjecting said inner tube to heating and cooling cycles.
Dependencies are inferred from the claim text.