The utility model relates to a smoke exhaust air duct, which comprises a cylinder body, the cylinder body comprises a frame layer and affixed to the skeleton layer on the inside and outside surface of the inner and outer surface layer, extending outward radial both ends of the cylinder, port diameter greater than the diameter of the cylinder is 3% ~ 7%. When the exhaust duct is pressurized exhaust duct, the skeleton layer is made of thick cloth Kam Kam thick cloth reinforced layer; when the exhaust duct is a negative pressure exhaust duct, the skeleton layer is a glass fiber cloth reinforced layer made of glass fiber cloth; the inner and outer surface layer is the rubber surface layer. The two ends of the cylinder body of the exhaust duct diameter expansion port can be better with the fire parts combination, supporting both increase the sealing performance, and convenient handling; and the use of a light texture, thin brocade thick cloth as a skeleton material, not only can achieve the requirements of the fire duct, exhaust air duct weight greatly relieved, and the cylinder thickness is thinner, the exhaust tube is easy to carry, easy to install and use.
【技术实现步骤摘要】
【技术保护点】
消防排烟风筒，包括筒体，所述筒体包括骨架层和贴于骨架层内外表面上的内、外表面层，其特征在于：筒体（１）的两端端口（２）径向向外扩，端口（２）的直径大于筒体（１）的直径３％～７％。
【技术特征摘要】
【专利技术属性】
技术研发人员：马送英，黄祥禹，陶刚，
申请(专利权)人：桂林橡胶制品厂有限责任公司，
类型：实用新型
国别省市：45[中国|广西]
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