Insulated transmission line for cryogenic media

Details Insulated transmission line for cryogenic media Insulated transmission line for cryogenic media

1980-04-24

1981-12-01

Little, Willis

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138113, 138114, F16L 918

Patent

active

043031056

ABSTRACT:
An improved insulated transmission line for the transfer of cryogenic media is disclosed comprising: a tubular heat shield, including at least three concentric, radially separated, corrugated metallic tubular members, that provides a first annular space between two of the tubular members wherein a multiple layer, fibrous insulating material is disposed under vacuum conditions; a second annular space between two of the tubular members, including the innermost of the tubular members, containing a liquid or gaseous cooling media; and a vacuum sealed, inner tubular space formed by the innermost tubular member; the improvement comprising: a plurality of corrugated metal pipes extending through such vacuum sealed inner tubular space and being spacially separated from each other and from the tubular heat shield for providing minimum heat conductance between the metal pipes, and between the metal pipes and the tubular heat shield, throughout their respective axial lengths.

REFERENCES:
patent: 2297165 (1942-09-01), Ringel
patent: 3473575 (1969-10-01), Vogelsang et al.
patent: 3490496 (1970-01-01), Stearns
patent: 3565118 (1971-02-01), Stearns
patent: 3762447 (1973-10-01), Holland
patent: 4121623 (1978-10-01), Rhone
patent: 4259990 (1981-04-01), Rohner

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