| 摘要 |
726,482. Heat insulation. GENERAL ELECTRIC CO. June 17, 1953 [July 11, 1952], No. 16752/53. Class 64 (2). A vessel for storing liquefied gas has outer and inner walls 10, 11 of metal, such as stainless steel, carbon steels electroplated or vitreous enamelled, or those metals known under the Registered Trade Marks "Monel" and "Invar". Moreover, the evacuated space between these walls contains a blanket 13 of mineral fibres, e.g. slag wool, asbestos, aluminium oxide, glass or quartz, randomly orientated with their axes in planes generally perpendicular to the path of heat flow between the walls and preferably precompacted as described in Specification 715,175. Figures are given for the degree of vacuum, the density of the blanket and the diameter of the fibres. A further wall 14 divides the blanket 13 from a surface of the inner wall 11 which is made heat-reflecting like the surface of the wall 14 which faces it. The fibre blanket is made thicker for support of the inner wall where, as at 15, the wall 14 is interrupted. The tank, which may be spherical or cylindrical, has a filling and emptying pipe 19 extending through a bellows 16. A valve 21 permits periodical testing and evacuation of the insulation space. |
