通風(fēng)管道得安裝位置怎樣更合理？

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　　通風(fēng)管道得安裝位置怎樣更合理？

　　How is the installation position of ventilation ducts more reasonable?

　　設(shè)置在高層建筑內(nèi)的通風(fēng)排煙管道設(shè)施，應(yīng)具備以下要求：

　　Ventilation and smoke exhaust duct facilities installed in high-rise buildings should meet the following requirements:

　　（1）排煙口應(yīng)設(shè)在頂棚上或靠近頂棚的墻面上，且與附近出口沿走道方向相鄰邊緣之間的水平距離不應(yīng)小于1.50m。設(shè)在頂棚上的排煙口，距可燃構(gòu)件或可燃物的距離不應(yīng)小于1.00m。

　　(1) The smoke exhaust outlet should be located on the ceiling or on the wall near the ceiling, and the horizontal distance between it and the adjacent edge of the nearby safety exit along the aisle direction should not be less than 1.50m. The distance between the smoke exhaust outlet installed on the ceiling and combustible components or materials should not be less than 1.00m.

　　排煙口平時(shí)關(guān)閉，并應(yīng)設(shè)置有手動(dòng)和自動(dòng)開啟裝置。

　　The smoke exhaust outlet should be closed normally and equipped with manual and automatic opening devices.

　　（2）防煙分區(qū)內(nèi)的排煙口距遠(yuǎn)點(diǎn)的水平距離不應(yīng)超過30m。

　　(2) The horizontal distance between the smoke exhaust outlet in the smoke prevention zone and the farthest point should not exceed 30m.

　　在排煙支管上應(yīng)設(shè)有當(dāng)煙氣溫度超過280℃時(shí)能自行關(guān)閉的排煙防火閥。

　　A smoke exhaust fire damper that can close automatically when the smoke temperature exceeds 280 ℃ should be installed on the smoke exhaust branch.

　　（3）排煙風(fēng)機(jī)可采用離心風(fēng)機(jī)或采用排煙軸流風(fēng)機(jī)，并應(yīng)在其機(jī)房入口處設(shè)有當(dāng)煙氣溫度超過280℃時(shí)能自動(dòng)關(guān)閉的排煙防火閥。排煙風(fēng)機(jī)應(yīng)保證在280℃時(shí)能連續(xù)工作30min。

　　(3) The smoke exhaust fan can be a centrifugal fan or an axial flow smoke exhaust fan, and a smoke exhaust fire damper that can automatically close when the smoke temperature exceeds 280 ℃ should be installed at the entrance of the machine room. The smoke exhaust fan should be able to operate continuously for 30 minutes at 280 ℃.

　?。?）機(jī)械排煙系統(tǒng)中，當(dāng)任一排煙口或排煙閥開啟時(shí)，排煙風(fēng)機(jī)應(yīng)能自行啟動(dòng)。

　　(4) In a mechanical smoke exhaust system, when any smoke exhaust outlet or smoke exhaust valve is opened, the smoke exhaust fan should be able to start on its own.