| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent corrosion by blocking formation of a battery while preventing invasion and stagnancy of an electrolyte such as water drop by arranging a soft insulation member so as to embed a clearance between an outer wheel and the opposing surface of a sealed member. SOLUTION: A spiral gasket 1 is used in such a constitution that a hoop material 3a and a filler material 3b are wounded in a spiral shape around the outer peripheral side of an inner wheel 2 so as to constitute a gasket main body 4, and an outer wheel 5 is interposed between flange parts 7, 8 (sealed members) of a pipe passage 6 for circulating gas and liquid on the outer peripheral side of the gasket main body 4. A soft insulation member 9 is arranged between the outer diameter part of the gasket main body 4 and the outer diameter part of a raised face part (a step difference part) so as to embed its clearance (the thickness is about 1mm). PTFE solid body, porous PTFE, or the like is used as the soft insulation member 9. Since the soft insulation member 9 is arranged on the opposing surface to the flange parts 7, 8 as the outer wheel 5 of an atmosphere side and a sealed member, it is possible to prevent invasion and stagnancy of an electrolyte such as rain water.</p> |
