| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a seal structure to enable reliable sealing of the outer periphery of a heat transfer pipe. SOLUTION: A tube plate 42 is situated along the outer surface of a heat insulation material 40. The vicinity of the end part of the heat transfer pipe 48 is inserted through holes 44 and 46 and fixed at the tube plate 42 by a holding ring 50, a press ring 60, a sealant 70, and bolts 80 and the outer periphery of the heat transfer pipe 48 is sealed. An insertion part 64 of the press ring 60 is inserted in a straight cylinder surface 52 of the holding ring 50, a bolt 82 is inserted through an opening 66, and fastening a nut 82 against the bolt 80, and the press ring 60 strongly presses the sealant 70. By exerting a reaction force on the sealant 70 by a taper surface 54, the sealant 70 is strongly adhered to the outer peripheral surface of the heat transfer pipe 48, and the outer periphery of the heat transfer pipe 48 is sealed in an airtight manner.</p> |
