| 摘要 |
<p>1. A sound-insulating metal bellows expansion joint consisting of a corrugated metal bellows (10) of which the ends widened out radially outwards to form an annular disc portion (12) are connected to attachment flanges (20) without metallic contact, characterized in that at least one of the attachment flanges consists of a sound-absorbing, non-metallic material which, at the inner periphery of the attachment flange (20), is vulcanized into the radially directed annular disc portion (12) of the bellows and is covered, at the side adjacent to the bellows meand , by a non-metallic ring (30), and that the side of the attachment flange (20) adjacent to the expansion joint is covered by an overlapping reinforcing ring (40) of steel sheet which is profiled in the shape of a hat and the inner opening (43) of which surrounds the peripheral surface (11) of the bellows with spacing.</p> |
