| 摘要 |
886,940. Carrying liquefied gases. ANCIENS CHANTIERS DUBIGEON S. A. DES, and LEROUX, R. Oct. 28, 1959 [June 2, 1959], No. 36575/59. Class 113. [Also in Group XXVIII] In a watercraft containing tanks 1 for liquefied hydrocarbons at low temperatures wherein the tanks are held in position by pressures applied thereto through a series of slides 7, 8, 11 or ball or roller bearings such that the tanks can expand or contract freely, said pressures are applied by hydraulic jacks 5, 6 located at the bottom of the craft, in the wing ballast tanks 18 and on the transverse bulkheads 26 and adapted to limit the pressures to values which the tanks are able to withstand safely. Thermal insulation may be fitted internally or externally of the tank. In the Figures the insulating material 2 surrounds the main wall 3 of the tank, 4 being a thin sheet metal covering. The tanks are supported on the hydraulic jacks and associated slides 7, 8, 11 on wood blocks 9 secured to the wall 3. The jacks are supported by keelsons 12, 13, web frames 16, and stiffeners 27 on the transverse bulkheads. Trunks 22 and 33 are provided to give access to the jacks and the tank. The jacks, which are connected to an automatic liquid pressure producing plant, may be interconnected by smallbore tubes.
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