Heat exchange – Casing or tank enclosed conduit assembly – Manifold formed by casing section and tube sheet of assembly
Patent
1984-07-09
1985-12-10
Hart, Douglas
Heat exchange
Casing or tank enclosed conduit assembly
Manifold formed by casing section and tube sheet of assembly
165154, F28F 902
Patent
active
045573220
ABSTRACT:
A closure system for heat exchangers, and, in particular for heat exchangers of the hairpin type. The system is designed to have a plurality of annular, substantially flat sealing surfaces against which sealing means of rectangular cross section can be applied to provide effective, reliable seals that will prevent fluid leakage. One of the sealing surfaces is defined by three, substantially coplanar portions; a first portion on the terminal portion attached to the outer shell of the heat exchanger, a third portion formed on the tube sheet that supports a plurality of tubes within the outer shell, and a second intermediate portion defined by an end face of a split retaining ring of L-shaped cross section. Besides providing an effective seal, compression of the sealing means against the first sealing surface also serves to lock the retaining ring in place to prevent relative longitudinal movement between the outer shell and the tube sheet and the tubes supported thereby. A second, independently accessible seal may also be provided by an annular gasket of rectangular cross section. The closure system of the present invention is relatively simple in design in that it avoids the need for tapered or other complex sealing surfaces or unusually shaped sealing rings. It also permits the heat exchanger to be easily disassembled for maintenance or inspection and thereafter reassembled for use.
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Document entitled "Construction Details", Form PE-64, issued 2/76, (believed to have been published by Brown Fintube Co.).
Document entitled "Closure Ass'y for Double Pipe", Bos-Hatten, Inc., dated 3/4/83.
Three documents of Smithco Engineering Co. (undated), entitled "Standard Alcotwin Multiuse Closure Max. Des'g. P.S.I. 600 Shell & Tube", High Pressure Shell and Tube Closure, and Standard Alcotwin Single Tube Closure Max Des'g. P.S.I. 600 Shell & Tube.
Document of Alco Products Inc. (undated), entitled "Thru-Bolt Ass'y".
Document (untitled and undated), illustrating a "Double-Pipe Closure", a Heavy Duty Closure, and a Severe Service Closure.
Hart Douglas
Kennedy Tank & Manufacturing Company, Inc.
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