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

a)通风栅的安装形式；主风管天花板风栅图1通风栅的安装形式

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

b)布风器的安装形式；250螺旋风管角钢支架L30×30×3软管天花板布风器抱箍图2布风器的安装形式

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)抽风头的安装形式；扁铁25×3甲板抽风头H抱箍单层螺旋风管L30×30×3吊架图3抽风头的安装形式

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)菌形通风筒的安装形式；

d) The installation form of the mushroom ventilator;

1）当菌形通风筒的安装高度H＜900时，其安装形式见图4。H＜900甲板图4菌形通风筒的安装形式

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）当菌形通风筒安装高度H≥900时，应加肘板，其安装形式见图5。H≥900甲板图5菌形通风筒的安装形式

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）当通风筒连接风机时，菌形通风筒安装应加肘板。甲板H1H图6菌形通风筒的安装形式

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 vent in deck h1h

e)壁式通风栅的安装形式；甲板天花板甲板≥60≥300图7壁式通风栅的安装形式

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

f)回风防火风闸的安装形式（垂直、水平见图8）；垂直安装防火风闸防火风闸钢围壁钢围壁甲板水平安装防火风闸天花板甲板≥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