Device and method for bonding auxiliary secondary barrier for liquefied natural gas storage tank

A device for bonding an auxiliary secondary barrier to exposed portions of a main secondary barrier, which are exposed between upper heat insulation boards adjacent to each other and spaced apart from each other in an LNG storage tank comprising a lower heat insulation board, the main secondary barrier, and upper heat insulation boards which are successively stacked between an inner hull and a primary barrier, the device comprising:

• a frame;
• a driving unit of which a portion is mounted on the frame, the driving unit allowing the frame to move on the upper heat insulation boards corresponding to the exposed portion of the main secondary barrier;
• a first heater disposed on the frame to heat the exposed portion;
• an adhesive applying unit mounted on the frame and comprising a heating part for heating an adhesive to be applied on the heated exposed portion, the adhesive applying unit applying the heated adhesive on the heated exposed portion;
• an auxiliary secondary barrier supply unit mounted on the frame to supply the auxiliary secondary barrier onto the applied adhesive;
• and
• a second heater disposed on the frame to heat the auxiliary secondary barrier to be supplied onto the applied adhesive before the auxiliary secondary barrier is supplied onto the applied adhesive, wherein the second heater comprises:
• a body part that is fixed to the frame, the body part having an inlet through which the auxiliary secondary barrier enters the body part, an inner space providing a moving path of the auxiliary secondary barrier inside the body part, and a discharge hole through which the auxiliary secondary barrier is discharged from the body part;
• a heating plate disposed vertically within the inner space of the body part to provide heat via conduction by contacting a to-be adhered surface of the auxiliary secondary barrier inside the body part;
• and
• a press part disposed at the body part to adjust a position of the heating plate in a horizontal direction.