| 摘要 |
1,210,624. Liquefied gas storage containers; cryostats. MAX-PLANCK-GES ZUR FORDERUNG DER WISSENSCHAFTEN E.V. 6 Feb., 1969 [13 Feb., 1968], No. 6593/69. Headings F4H and F4P. A radiation shield surrounding a vessel containing a liquefied gas is cooled by a heat exchanger which is fed with exhaust gas from the vessel and which has an internal crosssection larger than that of the pipe leading the gas to it. The vessel may be a cryostat or a reservoir for supplying a cryostat. As illustrated, the radiation shield contacts a heat exchanger whose internal wall has a helical element 3 which, together with a plug 15 defines a helical flow path for the exhaust gas flowing in a pipe 4. If it is necessary to introduce inserts into the vessel through the pipe 4 the plug 15 may be omitted. In this case, a pipe for the inserts may be enclosed within the pipe 4 and be contacted by the helical element 3, the exhaust gas then flowing in the annular space between the two pipes. In an alternative form of heat exchanger, Fig. 4 (not shown), the helical element is omitted and a sintered metal plug fills the transverse cross-section of the heat exchanger. |
