| 摘要 |
PURPOSE:To simplify the structure and the assembling work and to obtain a sure sealing effect by mounting a plurality of annular flat plate seal rings made of metal in a clearance between connecting parts in the inclined condition. CONSTITUTION:At connecting parts of tubes, a tube end 11 having a smaller diameter is fitted in a larger diameter part 13 formed at the other tube end 12. Metal seal rings 14 are mounted in a clearance H formed between an outer peripheral surface of the tube end 11 and an inner peripheral surface of the larger diameter part 13. In this case, an outer diameter of the seal ring 14 prior to fitting is larger than an inner diameter of the larger diameter part 13, and an inner diameter of the seal ring 14 is nearly equal to an outer diameter of the tube end 11. On the occasion of assembling, the seal rings 14 is first brought into contact with the tube end 11 and a tapered part 17 of the larger diameter part 13, and is thereafter pressed into an inner peripheral surface 16 of the larger diameter part 13 along the tapered part 17. At this time, the seal ring 14 is mounted in the inclined condition because the clearance H is narrower than a width of the seal ring 14 in its radial direction. |
