Tunnels and underground railways are tens of meters bel […]
Tunnels and underground railways are tens of meters below the ground surface. Natural ventilation of tunnels and underground railway stations is far from enough. It must be equipped with fansEC backward centrifugal fans Manufacturers to transport and regulate air or remove smoke and dust (exhaust smoke from vehicles in the tunnel). For the needs of staff and passengers.
The tunnel air-supply and exhaust fan is mainly of axial flow type, and the requirement is that the concentration of smoke and dust in the tunnel can be automatically operated, and the moving blades are adjustable, which can improve the operation efficiency of the fan, and can be reversed in the event of a fire to make it fast Exhaust smoke. Centrifugal or axial flow fans can be used for subway exhaust fans. Of course, mixed flow fans and general tunnel fans are also available. Since it is installed in an underground tunnel, it is preferably small. Since the air supply and exhaust ports are on the ground in the city, the fan noise should be low. Jet or axial flow fans can be used in short tunnels, long tunnels or underground railways. This fan is used by hanging from the ceiling. Because of the high noise, it is necessary to add a silencing cover, which can be reversed according to the wind direction.