| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a double pipe joint structure capable of securing sufficient seal performance between an inner pipe and an outer pipe while absorbing vibration and an attaching error etc. and having an advantage such as the simplification or the like of a piping structure by suppressing an increase of the number of part items. <P>SOLUTION: In the double pipe joint structure, an upstream side exhaust pipe 60a and a downstream side exhaust pipe 60b are double pipes formed of an inner pipe 6 and an outer pipe 4. The exhaust pipes 60a, 60b are connected by a joint 1. The joint 1 includes an inner pipe seal member 13 for connecting the inner pipes 6 with each other and an outer pipe seal member 12 for connecting the outer pipes 4 with each other. For example, both the seal members 13, 12 are formed of steel wool, the outer pipe seal member 12 is formed to have higher density and a larger spring constant than those of the inner pipe seal member 13, and the axial length L<SB>1</SB>of the inner pipe seal member 13 is formed so as to be longer than the axial length L<SB>2</SB>of the outer pipe seal member 12. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
