| 摘要 |
<p>The present invention provides a sleeve (10) configured to be assembled through a wall-breaching hole (B) so s to prevent the passage of flame and smoke therethrough. The sleeve (10) has a barrel (12) with a fixedly secured flange (14) on one end thereof. An intumescent sheet material (30, 32) is adhered to the inner and the outer surface of the barrel (12). After passing the barrel (12) through the hole (B) in the wall (w), a second flange (22) is mounted on the second end of the barrel (12). Each flange (14, 22) is fastened to a respective side of the wall (w) through a series of holes in the flanges (14, 22). Each flange (14, 22) has a series of circumferential tabs (24) adapted to being bent inwardly and has a ring of intumescent putty (38) within the tabs and a second ring of intumescent putty (36) on its wall-facing surface.</p> |
