Termination for boiler casing expansion element
AssigneeThe Babcock & Wilcox Company
InventorEdward W. Kreider
Life of this patent
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Abstract
An attachment arrangement for attaching a boiler casing to a membrane tube wall utilizes an extension plate which is connected to and extends beyond an edge of the casing. The extension plate and the surface of the casing adjacent its edge define an attachment area which is attached to the tube wall. A slot extends in the casing and through part of the extension plate. The slot is covered by an expansion element having a termination covering the end of the slot. The termination is on the extension plate. The termination of the expansion element extending over the extension plate provides compensation for expansion in the attachment area which avoids deformation and tearing of the casing in this area.
Claims11
An attachment arrangement for a membrane tube wall of a vapor generator, the attachment arrangement comprising a casing having an edge and an attachment surface near the edge, an extension plate connected to the casing and extending beyond the edge, said extension plate having an attachment surface, an attachment area extending over the attachment surfaces of the casing and the extension plate and being attached to the tube wall, the casing having a slot extending therein, the slot extending past the edge into the extension plate, an expansion element straddling the slot and being connected to the casing and to the extension plate on opposite sides of the slot and the expansion element having a termination covering an end of the slot and connected to said extension plate whereby thermal expansion and contraction of said casing in the vicinity of said attachment area is compensated for by said expansion element and termination to resist tearing and deformation of said casing in said attachment area.
Dependencies are inferred from the claim text.