| 摘要 |
<p>The device has a base plate (1), and a pressure plate (5) with a feed-through opening (18) for passing cables or tubes. A fire protection plate (3) is made of a material e.g. plastic, which expands during heating, and is arranged parallel to and between the base and pressure plates. A spiral spring (6) is provided for pressurization of the fire protection plate in case of fire. The spring is arranged so that the exerted pressure acts perpendicular to the plates. A sealing plate (4) is arranged between the base and pressure plates. The protection plate is provided as a sound protection unit.</p> |
