| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a heat insulating tube for a superconducting cable, capable of corresponding to circulation of a coolant at high pressure and restraining increase of a constituent material as the whole heat insulating tube. <P>SOLUTION: The heat insulating tube 20 has an inner tube 20a for storing a core 10 with a superconductor and the coolant for cooling the core 10, and an outer tube 20b for forming a vacuum layer at an outer side of the inner tube 20a, wherein both inner and outer tubes are made from a stainless steel. Thickness of the inner tube 20a is 0.8 mm or more, and thickness of the outer tube 20b is thinner than the thickness of the inner tube 20a. Mechanical strength of the inner tube 20a is improved in this structure, and circulation of the coolant can be achieved at high pressure. Increase of a constituent material can be restrained as the whole heat insulating tube 20 since the thickness of the outer tube 20b is thinner than the inner tube 20a. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
