Patent ID: 11971140
Assignee: HANWHA OCEAN CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 4:
5. An insulating wall fixing device for liquefied natural gas storage a liquefied natural gas storage tank comprising a primary insulating wall and a secondary insulating wall that are arranged such that the primary insulating wall is placed over the secondary insulating wall, wherein the insulating wall fixing device is configured to couple the primary insulating wall and the secondary insulating wall, the insulating wall fixing device comprising:
a securing stud, one end of which has a spherical shape; and
a base socket having an interior space configured to receive the one end of the securing stud therein,
wherein the interior space of the base socket has a spherical shape such that the securing stud is rotatable with the one end of the securing stud received in the base socket;
wherein the base socket comprises an insertion hole through which the securing stud is inserted into the base socket, the insertion hole having a smaller diameter than the one end of the securing stud;
wherein the securing stud comprises a groove such that the one end of the securing stud is configured to retract to enter the insertion hole upon inserting the securing stud into the base socket;
wherein the securing stud comprises a fastener portion protruding from the one end and a seat portion outwardly protruding from a circumference of the fastener portion,
wherein when the securing stud is settled in the interior space of the base socket, the seat portion of the securing stud comprises a periphery seated over an upper surface of the base socket and configured to be welded to a sealing wall provided between the primary insulating wall and the secondary insulating wall,
wherein the interior space of the base socket has a spherical space having an inner diameter greater than the one end of the securing stud, and there is a gap between the interior space of the base socket and the one end of the securing stud, and
wherein the securing stud is able to move in six degrees of freedom in the interior space of the base socket.