| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing device for a bus duct capable of improving a sealing performance in the case of fire between the bus duct that penetrates a partition wall for separating a fire zone and the partition wall, and a penetration part structure.SOLUTION: In a sealing device 10, a frame material 12 of a holding member 11 configured by welding steel materials having L-shaped and Z-shaped cross sections is provided while surrounding an outer peripheral part of a bus duct 4 which penetrates a fireproofing wall 1 as a partition wall and of which the cross section is rectangular. The frame material 12 is fixed to the bus duct 4 by a bolt 14, and an accommodation part 13 is formed between the frame material and the bus duct 4. In the accommodation part 13, an incombustible blanket 18 having elasticity is accommodated while being compressed so as to be elastically deformed and seal a gap between the holding member 11 and the bus duct 4 and a gap between the bus duct 4 and the incombustible wall 1 or mortar 2. Even if a fire occurs in a fire zone and the bus duct 4 is deformed, the incombustible blanket 18 is elastically deformed and prevents a gap from being generated, such that the sealing performance is improved.SELECTED DRAWING: Figure 1 |
