摘要:
A liquefied gas storage tank (2) includes: an inner shell (3) storing a liquefied gas; an outer shell (4) forming a vacuum space (20) between the inner shell (3) and the outer shell (4); and a fail-safe thermal insulating layer (6) covering an outer side surface of the outer shell (4). According to this configuration, the fail-safe thermal insulating layer (6) is not disposed in the vacuum space (20). This makes it possible to suppress the degradation over time of the degree of vacuum in the vacuum space (20).
摘要:
A support structure of a ship tank includes: a curved surface facing an outer peripheral surface of a horizontal type cylindrical tank (2); and a pair of support units (4A, 4B) supporting the tank 2 on the curved surface. Each of the support units includes: a plurality of cylindrical elements (5) arranged in a circumferential direction of the tank (2) such that an axial direction of each of the cylindrical elements (5) coincides with a radial direction of the tank (2); a plurality of inner members each holding an end portion of a corresponding one of the cylindrical elements (5) at the tank (2) side; and a plurality of outer members each holding an end portion of a corresponding one of the cylindrical elements (5) at an opposite side to the tank (2). The inner members are fixed to the tank (2). The outer members of one of the support units (4A) are configured such that displacement of the outer members in an axial direction of the tank (2) relative to the curved surface is restricted. The outer members of the other one of the support units (4B) are configured to be slidable on the curved surface in the axial direction of the tank (2).
摘要:
A support structure of a ship tank, the ship tank being a horizontal type circular cylindrical tank (2) mounted on a ship and storing a liquefied gas, includes: a curved surface facing an outer peripheral surface of the tank; and a support unit (4) supporting the tank on the curved surface and extending in a circumferential direction of the tank. The support unit includes: a plurality of tubular elements (5) arranged in the circumferential direction of the tank such that an axial direction of each of the tubular elements coincides with a radial direction of the tank; a plurality of inner members (6) each holding, on the outer peripheral surface of the tank, an end portion of a corresponding one of the tubular elements at the tank side; and a plurality of outer members (7) each holding, on the curved surface, an end portion of a corresponding one of the tubular elements at an opposite side to the tank. The plurality of inner members are fixed to the tank. The plurality of outer members are configured to be slidable on the curved surface in an axial direction of the tank.
摘要:
A horizontal type cylindrical double-shell tank (2A) includes: an inner shell (3) including an inner shell main part (31) and an inner shell dome (32); and an outer shell (4) including an outer shell main part (41) and an outer shell dome (42). The outer shell dome (42) incorporates therein a deformable member (5). A first restricting mechanism (6) is disposed between a movable part (42A) of the outer shell dome (42) and the inner shell dome (32). A second restricting mechanism (7) is disposed between a fixed part (42B) of the outer shell dome (42) and the inner shell dome (32). The first restricting mechanism (6) restricts movement of the movable part (42A) of the outer shell dome (42) and movement of the inner shell dome (32) relative to each other in a particular direction while allowing the inner shell dome (32) to contract. The second restricting mechanism (7) restricts movement of the inner shell dome (32) in a radial direction while allowing the inner shell dome (32) to contract and allowing the inner shell dome (32) to move in the particular direction relative to the fixed part (42B) of the outer shell dome (42).
摘要:
A structure of a horizontal type cylindrical double-shell tank (8) mounted on a ship includes: an inner shell (2) storing a liquefied gas; and an outer shell (3) forming a vacuum space between the inner shell (2) and the outer shell (3). A pair of support units (4A, 4B) supporting the inner shell (2) is disposed between the inner shell (2) and the outer shell (3). Each support unit includes: a plurality of cylindrical elements arranged in a circumferential direction of the tank (8) such that an axial direction of each of the cylindrical elements coincides with a radial direction of the tank (8); a plurality of inner members each holding an end portion of a corresponding one of the cylindrical elements at the inner shell (2) side; and a plurality of outer members each holding an end portion of a corresponding one of the cylindrical elements at the outer shell (3) side. Each of the cylindrical elements is made of glass fiber reinforced plastic.