| 摘要 |
<p>PURPOSE:To easily remove parts in a tank, by providing a heat insulating layer, which surrounds each side surface of a pump unit, rod and a fuel pipe so as to be isolated from low temperature liquefied gas, while a cylindrical body which can protrude and sink from the point end of the heat insulating layer. CONSTITUTION:A heat insulating layer 10, which surrounds each side surface of a pump unit 4, rod 7 and a fuel pipe 8 so as to be isolated from liquid hydrogen 2, nd a cylindrical body 9, which can protrude and sink in the point end of said heat insulating layer 10, are provided in a fuel tank 1. In this way, since the cylindrical body 9 is sunk to inside the heat insulating layer 10 to seal the liquid hydrogen 2 by extracting the rod 7, parts in the tank can be removed with no necessity for discharging the liquid hydrogen from the tank.</p> |
