不同場合防火封堵方法

不同場合防火封堵方法
(1) 電 線 電 纜 穿 墻 孔 洞。一 般 電 線 電 纜 貫 穿 隔墻、樓層的孔洞處，均實施防火封堵;使用耐火、防火電纜的其它重要回路，如消防、報警、應急照明、計算機監(jiān)控等也應實施防火封堵。具體做法是將需實施防火封堵的部位清理干凈，整理電纜，清除表面油污、灰塵;將有機堵料揉勻后，用合適的工具將其鋪于需封堵的縫隙中。封堵較大的孔洞時，應與無機防火堵料配合使用，電纜兩側(cè)各 1 m 處涂刷防火涂料。
(2)電線電纜穿樓層孔洞 。穿越樓層的電纜孔洞若較小，可直接用有機堵料封堵，如果穿孔面積較大時應作配筋處理或采用與分隔體相同耐火極限的防火板在底部襯托，其結(jié)構(gòu)強度不得低于分隔體。由下而上實施防火封堵的方法是將電纜四周用有機堵料包裹電纜，四周用防火包填實嚴密，底部用防火隔板托住防火包，并用膨脹螺栓固定;若是小孔洞，則直接用有機堵料嵌于需封堵的縫隙中，電纜兩側(cè)各 1 m 處涂刷防火涂料。
(3) 電纜豎井。一般豎井若電纜排列整齊，可采用防火隔板、有機、無機防火堵料、防火包進行封堵，電纜穿越部位應保證封堵厚度和強度。
(4)電纜貫穿孔。電纜貫穿孔的防火封堵應嚴格按相關(guān)要求，用灰沙或混凝土填充穿孔，其余部分孔隙應用軟性受熱膨脹型的防火堵料嚴密封堵。
(5)電纜橋架。電纜橋架(線糟) 的貫穿孔口應采用無機堵料防火灰泥，或阻火包、防火板或有機堵料如防火發(fā)泡磚并輔以有機堵料如防火密封膠或防火泥等封堵。當貫穿鋼筋混凝土墻體或輕質(zhì)防火分隔墻體時，應注意采用不同的堵料材料。具體實施時應拆除橋架蓋板，將防火堵料塞至電 纜，并不得有任何縫隙。軟性防火堵料兩面應分別用大于其面積的防火板翻蓋，防火板與分隔體之間應用高強度螺絲釘緊固連接。用阻火包進行封堵時，施工前應整理電纜，檢查阻火包有無破損，施工時，在電纜周圍宜裹一層有機防火料。

(1) electric wire cable through wall hole. The electric cable is used to penetrate the wall and the hole of the floor. Fire protection, alarm, emergency lighting and computer monitoring should also be used in other important circuits of fireproof and fireproof cables. The specific practice is to clean up the parts that need to be fireproof, tidy up the cables, and remove oil and dust on the surface. After kneading the organic material, use the appropriate tool to place it in the gap that needs to be blocked. When sealing the large hole, it should be used with the inorganic fireproof plug, and the two sides of the cable shall be painted with fire retardant coating.

(2) the electric wire and cable are perforated by the floor. If the cable holes across the floor is lesser, can be directly with organic plugging material block, if perforation should be done when the larger area reinforcement processing or use the same as the space body fire endurance of fire prevention board in the bottom of the foil, its structural strength is not less than separate body. Bottom-up implementation of fire-proof sealing method is to cable cable with organic plugging material all round, round with fireproof bag filling reality closely, use the fire barrier hold fire at the bottom of the package, and expansion bolt; If the hole is small, the organic block is directly embedded in the gap which needs to be blocked. The fireproof coating is painted on each side of the cable.

(3) cable shaft. In general, if the cables are arranged in a neat arrangement, fireproof partitions, organic, inorganic fireproof blocks and fireproof packages can be used to block the cables, and the sealing thickness and strength should be guaranteed by the cable crossing site.

(4) the cable runs through the hole. The fireproof plugging of the cable through the hole should be strictly according to the relevant requirements, and the holes shall be filled with ash sand or concrete. The remaining part of the pore shall be tightly sealed with the soft thermal expansion type.

(5) cable bridge. Line cable tray (worse) through the orifice should use inorganic plugging material fire plaster, or fire, fire prevention board, or organic plugging material such as foam fire brick and supplemented by plugging material such as fire sealant or fire clay plugging. When the walls of reinforced concrete walls or light fire are separated, different materials should be used. When the concrete implementation, the bridge frame should be removed, and the fireproof plug should be plugged into the cable, and there should be no gap. The two sides of soft fireproof blockage should be covered with fire prevention board with greater than its area, and the high strength screw fastening connection should be applied between the fire prevention board and the divider. In case of blocking, the cable should be collated before construction to check whether there is any damage or breakage. In the construction, a layer of organic fireproof material should be wrapped around the cable.