Tight joining between metallic tubes, tubular elbow and end...

H - Electricity – 01 – L

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327/3, 356/98

H01L 35/28 (2006.01) F16L 37/14 (2006.01) F25B 21/02 (2006.01) F28D 7/16 (2006.01) F28F 9/013 (2006.01) F28F 9/26 (2006.01)

Patent

CA 1234878

ABSTRACT OF THE DISCLOSURE Exchanger tubes are mechanically fastened together by end plates into superposed layers to form hydraulic connections between the extremities of two tubes using tubular elbows. Each tubular elbow carries at its extremeties a tubular connecting coupling which can be welded, brazed or glued. The subassembly comprising an elbow with tubular coupling is encased in cylindri- cal recesses provided on the external faces of each end plate and is mechanically locked by pairs of straight pins in bored parallel holes orthogonally placed with respect to the axis of the tubes. Each pin is embedded in an external groove of the tubular coupl- ing rolled over half of its circular section.

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