Ventilation accessories and spiral air ducts are generally arranged in the following forms

a)通風(fēng)柵的安裝形式；主風(fēng)管天花板風(fēng)柵圖1通風(fēng)柵的安裝形式

a) Installation form of air grille; ceiling air grille of main air duct Figure 1 installation form of air grille

b)布風(fēng)器的安裝形式；250螺旋風(fēng)管角鋼支架L30×30×3軟管天花板布風(fēng)器抱箍圖2布風(fēng)器的安裝形式

b) Installation form of air distributor: 250 spiral air duct angle steel support L30 × 30 × 3 hose ceiling air distributor hoop Figure 2 installation form of air distributor

c)抽風(fēng)頭的安裝形式；扁鐵25×3甲板抽風(fēng)頭H抱箍單層螺旋風(fēng)管L30×30×3吊架圖3抽風(fēng)頭的安裝形式

c) Installation form of suction head: flat iron 25 × 3 deck suction head h hoop single-layer spiral air pipe L30 × 30 × 3 hanger Figure 3 installation form of suction head

d)菌形通風(fēng)筒的安裝形式；

d) The installation form of the mushroom ventilator;

1）當(dāng)菌形通風(fēng)筒的安裝高度H＜900時，其安裝形式見圖4。H＜900甲板圖4菌形通風(fēng)筒的安裝形式

1) When the installation height of the mushroom ventilation tube h ＜ 900, its installation form is shown in Figure 4. H ＜ 900 deck Figure 4 installation form of mushroom vent

2）當(dāng)菌形通風(fēng)筒安裝高度H≥900時，應(yīng)加肘板，其安裝形式見圖5。H≥900甲板圖5菌形通風(fēng)筒的安裝形式

2) When the installation height of the mushroom ventilation pipe h ≥ 900, the bracket plate shall be added, and the installation form is shown in Figure 5. H ≥ 900 deck Figure 5 installation form of mushroom vent

3）當(dāng)通風(fēng)筒連接風(fēng)機(jī)時，菌形通風(fēng)筒安裝應(yīng)加肘板。甲板H1H圖6菌形通風(fēng)筒的安裝形式

3) When the ventilator is connected with the ventilator, the bracket plate shall be added for the installation of the mushroom ventilator. Figure 6 installation form of mushroom ventilation duct of deck h1h

e)壁式通風(fēng)柵的安裝形式；甲板天花板甲板≥60≥300圖7壁式通風(fēng)柵的安裝形式

e) Installation form of wall type ventilation grid; deck ceiling deck ≥ 60 ≥ 300 Figure 7 installation form of wall type ventilation grid

f)回風(fēng)防火風(fēng)閘的安裝形式（垂直、水平見圖8）；垂直安裝防火風(fēng)閘防火風(fēng)閘鋼圍壁鋼圍壁甲板水平安裝防火風(fēng)閘天花板甲板≥300.

f) Installation form of return air fire damper (see Fig. 8 for vertical and horizontal); vertical installation of fire damper, fire damper, steel enclosure, steel enclosure, and horizontal installation of fire damper ceiling deck ≥ 300