US 12,560,282 B2 · Liquefied gas storage tank and ship including same

Abstract

The present disclosure relates to a liquefied gas storage tank and a ship including the same. A liquefied gas storage tank according to the present disclosure is a liquefied gas storage tank for storing a cryogenic material and includes a primary barrier made of metal to form an accommodating space for accommodating a cryogenic material; a primary insulating wall in which a primary plywood and a primary insulating material are sequentially disposed to the outside of the primary barrier; a secondary barrier provided on the outside of the primary insulating wall; and a secondary insulating wall in which a secondary insulating material and a secondary plywood are sequentially disposed in a stack to the outside of the secondary barrier, wherein the secondary barrier includes a main barrier provided on top of each secondary insulating wall constituting a unit element; and an auxiliary barrier connecting the adjacent main barriers to each other, the secondary barrier is formed of a mixed material of a metal and a non-metal, and the primary insulating wall has a thickness of 66% to 166% of that of the secondary insulating wall in order to lower a thermal stress.

Claims19

Dependent claims

A liquefied gas storage tank for storing a cryogenic material, comprising:

a primary barrier made of metal to form an accommodating space for accommodating a cryogenic material;
a primary insulating wall in which a primary plywood and a primary insulating material are sequentially disposed to the outside of the primary barrier;
a secondary barrier provided on the outside of the primary insulating wall;
and
a secondary insulating wall in which a secondary insulating material and a secondary plywood are sequentially disposed in a stack to the outside of the secondary barrier, wherein the secondary barrier comprises:
a main barrier provided on top of each secondary insulating wall constituting a unit element;
and
an auxiliary barrier configured to connect adjacent main barriers to each other, and
wherein the secondary barrier is formed of a mixed material of a metal and a non-metal, and
the primary insulating wall has a thickness of 66% to 166% of that of the secondary insulating wall in order to lower a thermal stress,
wherein the secondary barrier is disposed in a central region corresponding to 40% to 60% of a total thickness based on a thickness direction in the liquefied gas storage tank.

8 more elements

A liquefied gas storage tank for storing a cryogenic material, comprising:

a primary barrier made of metal to form an accommodating space for accommodating a cryogenic material;
a primary insulating wall provided on the outside of the primary barrier;
a secondary barrier provided on the outside of the primary insulating wall which comprises a main barrier and an auxiliary barrier;
and
a secondary insulating wall provided on the outside of the secondary barrier,
wherein the primary barrier comprises a plurality of flat portions fixed to an upper surface of the primary insulating wall, and a curved portion formed between the plurality of flat portions to form a curved surface toward the accommodating space and comprising a horizontal curved portion and a vertical curved portion,
wherein a cross-sectional shape of the curved portion comprises:
a pair of first curved portions connected to each of the adjacent flat portions and having a first curvature radius r1;
a second curved portion forming an upper portion of the curved portion and having a second curvature radius r2 with a radius at least greater than the first curvature radius r1;
and
a pair of third curved portions connecting each of the pair of first curved portions and the second curved portion, and having a third curvature radius r3 with a radius at least greater than the second curvature radius r2, and
wherein the pair of third curved portions are positioned so that a first curvature center of any one of the third curved portions and a second curvature center of the other third curved portion are shifted in a horizontal direction inside the curved portion.

9 more elements

Dependencies are inferred from the claim text.

Liquefied gas storage tank and ship including same

Life of this patent

Liquefied gas storage tank and ship including same

Life of this patent

Abstract

Claims19