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

Claim 0:
1. An insulating wall fixing device for 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 base socket; and
a securing stud inserted into the base socket,
wherein the base socket comprises an insertion hole through which the securing stud is inserted into the base socket and an interior space in which one end of the securing stud is settled;
wherein the securing stud comprises an insertion body portion inserted into the interior space of the base socket through the insertion hole, a fastener portion protruding from the insertion body portion of the securing stud and a disk-shaped seat portion outwardly protruding from a circumference of the fastener portion,
wherein the insertion body portion has a spherical shape and comprises multiple leg members divided by one or more grooves,
wherein the multiple leg members of the insertion body portion are configured to retract toward the one or more grooves to enter the insertion hole upon inserting the securing stud into the base socket,
wherein the disk-shaped seat portion 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 insertion body portion, and there is a gap between the interior space of the base socket and the insertion body portion, and
wherein the securing stud is able to move in six degrees of freedom in the interior space of the base socket.