INNER TUB SUPPORT STRUCTURE FOR AN LNG STORAGE TANK FOR SHIP

摘要

The present invention relates to an inner tank supporting structure for an LNG storage tank for a ship, which does not restrict expansion or contraction of an inner tank in circumferential and lengthwise directions while the inner tank is expanded or contracted due to a temperature change caused by storage and discharge of LNG. The inner tank supporting structure for the LNG storage tank which has a cylindrical outer tank and a cylindrical inner tank, includes: a sliding main supporter mounted at one side of a bottom of the outer tank so as to fix the center of a bottom surface of the inner tank, the sliding main supporter having elongated sliding grooves formed in the lengthwise direction of the inner tank; a sliding main supporter mounted at the other side of the bottom of the outer tank so as to fix the center of the bottom surface of the inner tank, the sliding main supporter having round grooves; and a sub supporter mounted at the bottom of the outer tank so as to support the bottom surface of the inner tank, wherein the bottom surface of the inner tank is not fixed to the sub supporter.