| 摘要 |
PROBLEM TO BE SOLVED: To provide a double tube joint, and a brazing method of the double tube joint and a double tube suitably applied to the double tube of integrally molding an outer tube, an inner tube, and a connecting rib. SOLUTION: This double tube joint 50 is used for connecting the double tube 100 of integrally molding the outer tube 101, the inner tube 102, and the connecting rib 103 by extruding and drawing, and forms a stopper 511 for locking the tip of an outer tube end part 101a, and a tapered receiving part 523 for holding a brazing material 522 for brazing a through part for allowing the exposed inner tube to penetrate through a branch part 500. At brazing time, the receiving part exhibits the function of temporarily holding the brazing material, and the function of fastening the melting brazing material by turning an opening port 523a upward. COPYRIGHT: (C)2004,JPO |
