| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a vacuum heat-insulated multiple tube provided with a thermal jacket tube capable of using a heat shrinkage absorbing means of simple structure and low cost. SOLUTION: In an axial direction cut part L in the thermal jacket tube 2, a heat shrinkage absorbing tube 2a is disposed, and between each end part of the thermal jacket tube 2 and the heat shrinkage absorbing tube 2a, a short tube 2b is disposed. The heat shrinkage absorbing tube 2a and the short tube 2b are connected to each other by brackets 7 and pins 8 in such a way that they can be displaced in an axially perpendicular direction. The short tube 2b and the thermal jacket tube 2 are connected to each other by brackets 5 and pins 6 in such a way that they can be displaced in a different axially perpendicular direction at 90 deg. to the above axially perpendicular direction.</p> |
