초록 ▼

An LNG storage tank comprises a heat insulating wall on an inner surface of the storage tank, a sealing wall contacting LNG on the heat insulating wall, and a structure to support the sealing wall. The structure comprises an anchor structure, which comprises an anchor member between the inner surfac

An LNG storage tank comprises a heat insulating wall on an inner surface of the storage tank, a sealing wall contacting LNG on the heat insulating wall, and a structure to support the sealing wall. The structure comprises an anchor structure, which comprises an anchor member between the inner surface of the storage tank and the sealing wall to secure the sealing wall to the inner surface, and a heat-insulating material around the anchor member. The anchor member is coupled at several portions to the inner surface. The structure provides a simple configuration to the heat insulating wall and the sealing wall, and a simple connection therebetween, enabling convenient construction thereof while increasing sealing reliability. The structure simplifies an assembled structure and a manufacturing process, reducing a construction time of the tank while efficiently relieving stress on the tank.

대표청구항 ▼

What is claimed is: 1. A liquefied natural gas (LNG) storage tank, comprising: a heat insulating wall disposed on an inner surface of the LNG storage tank to form a heat insulating layer; sealing walls disposed on the heat insulating wall to contact LNG; and a structure to support the sealing walls

What is claimed is: 1. A liquefied natural gas (LNG) storage tank, comprising: a heat insulating wall disposed on an inner surface of the LNG storage tank to form a heat insulating layer; sealing walls disposed on the heat insulating wall to contact LNG; and a structure to support the sealing walls, wherein the structure comprises an anchor structure including: an anchor member connected between the sealing walls and the inner surface of the storage tank to secure the sealing walls to the inner surface of the storage tank, and a heat-insulating material formed around the anchor member, the anchor member being coupled at a plurality of locations to the inner surface of the storage tank, wherein the sealing walls comprises a first sealing wall directly contacting the LNG and a second sealing wall spaced from the first sealing wall, wherein the anchor member comprises a frustoconical body having a closed top and an opened base, the opened base comprising a securing part connected to the inner surface of the storage tank, and the closed top comprising a first junction part and a second junction part wherein the first junction part is raised from the second junction part to have a predetermined height difference therebetween, and wherein the first sealing wall is welded to the first junction part and the second sealing wall is welded to the second junction part. 2. The LNG storage tank according to claim 1, wherein the securing part has a ring shape formed along an overall outer circumference at a lower end of the body of the anchor member, and is formed with a plurality of through-holes. 3. The LNG storage tank according to claim 1, wherein the frustoconical body of the anchor member comprises a plurality of holes arranged in a zigzag pattern. 4. The LNG storage tank according to claim 1, wherein the heat-insulating material of the anchor structure has a lower density than that of a planar heat-insulating material for a planar structure formed around the anchor structure. 5. The LNG storage tank according to claim 1, wherein the securing part is integrally formed with the opened base of the anchor member, and the first and second junction parts are integrally formed with the closed top of the anchor member. 6. The LNG storage tank according to claim 5, wherein the anchor member further comprises a reinforcing plate mounted inside an upper end of the anchor member to provide a double structure to the closed top of the anchor member where the first and second junction parts are formed. 7. The LNG storage tank according to claim 1, wherein the structure constituting the LNG storage tank further comprises a corner structure disposed at a corner of the storage tank to support the sealing walls, and wherein the corner structure comprises a corner member connected between the sealing walls and the inner surface of the storage tank to secure the sealing wall to the inner surface thereof, and a heat-insulating material formed around the corner member, the corner member comprising a fixed member secured to the inner surface of the corner of the storage tank, and a movable member supported on the fixed member to move linearly on the fixed member. 8. The LNG storage tank according to claim 7, wherein the corner member further comprises a connection member to connect and secure the movable member to the inner surface of the corner of the storage tank. 9. The LNG storage tank according to claim 8, wherein the fixed member and the connection member of the corner member are coupled at a plurality of locations to the inner surface of the corner of the storage tank. 10. The LNG storage tank according to claim 7, wherein the fixed member comprises a guide recess and the movable member comprises a guide protrusion, the movable member being linearly moved on the fixed member by the guide recess and the guide protrusion. 11. The LNG storage tank according to claim 10, wherein the guide protrusion is produced independent of the movable member, and integrally welded to the movably member to match a location of the guide recess of the fixed member after positioning the movable member on the fixed member.