Isolable double-walled insulation tank for launch vehicle

An isolable double-walled insulation tank for a launch vehicle, the insulation tank comprising:

• a hollow open cylinder part having an open upper end portion and an open lower end portion in an upright state thereof;
• an upper cap part configured to seal the upper end portion of the open cylinder part;
• and
• a lower cap part configured to seal the lower end portion of the open cylinder part,
• wherein the open cylinder part comprises:
• an outer cylindrical wall part having a smooth outer peripheral surface;
• an uneven part slidably fitted and coupled to the outer cylindrical wall part;
• and
• multiple load-dispersing spaces, wherein each of the load-dispersing spaces is ring-shaped due to a portion of the uneven part spaced apart from the outer cylindrical wall part and is arranged to be spaced apart from each other in a height direction of the open cylinder part, and
• wherein the uneven part comprises:
• coupling portions being spaced apart from each other and slidably supported on the outer cylindrical wall part;
• and
• a curvature portion configured to connect two adjacent coupling portions to each other and to form the load-dispersing space.