| 摘要 |
892,044. Carrying liquefied gas cargo. CORY & SON Ltd., Wm. March 31, 1958 [April 5, 1957], No. 11127/57. Class 113. [Also in Group XXVIII] A tanker for the transport in the liquid state at low temperature of methane (or like ordinarily,gaseous substance) has one or more cargo tanks each of which rests on supports which allow lateral expansion and contraction of the tank but is constrained against lateral bodily displacement by at least one connection, such as a spigot type connection, provided between the tank and the ship's structure at the tank bottom centre or the tank top centre or both. The tank 90 is stiffened internally (see Group XXVIII) and is entirely surrounded by thermal insulating material 106, 107 between the tank and the ship's structure 10. Central spigots 101, 92 at the upper and lower ends of the tank are located in seatings integral with the ship's structure. The interior of the hollow bottom spigot 92 forms a sump for the tank. This spigot is housed in a steel ring 113, Fig. 5, rigidly attached to the ship's structure by means of two concentric channel section rings 114, 115 between which are a number of flexible rubber or plastic cushions 118 filled with an hydraulic liquid, the pressure of which may be varied. These cushions hold the spigot in position while allowing for its radial expansion and contraction. The upper spigot may be similarly held, or as shown in Fig. 7 may be held by concentric rings 132, 133 having mating conical surfaces 135. The tank is supported by rollers 108 on stools 109 secured to the ship's structure. Upward movement of the tanks is prevented by anchoring chains (not shown). Specifications 892,041, 892,042, 892,043, 892,045 and 892,046 are referred to. |
