News

Home page

全部分类

Fire exhaust fan assembly pay attention to how to set the fire valve

Release Time：2021-07-20

The quality of the axial flow fire exhaust fan has a great relationship with its own configuration, and what are the requirements of the axial flow fire exhaust fan configuration.
Requirement 1: The painting technology of the inner and outer surfaces of the axial flow fire exhaust fan conforms to the regulations. The paint selected by the exhaust fan should basically not change color after the exhaust fan conveys 280 ℃ medium.
Requirement 2: The transmission set, pulley, coupling and other rotating transmission parts of the axial flow fire exhaust fan shall be equipped with protective covers. In addition to avoiding sundries from entering and affecting the normal operation of the fan, it shall also effectively protect the components of the fire exhaust fan from being bruised during handling.
Requirement 3: The radial clearance value between the axial flow fire smoke exhaust air casing and the impeller shall be uniform, and the radial unilateral clearance value: when the machine number is ≤ No. At 10 o'clock, the clearance value is ≥ 3.5mm, the machine number is> No.10, and the clearance is ≥ 4.5mm to ensure high efficiency.
In general, the fire exhaust fan is interlocked with the smoke exhaust fire damper on the inlet main pipe. However, 280-degree fire dampers are usually set at several positions in a smoke exhaust system. For example, the fan is set on the roof to bear several layers of vertical smoke exhaust fire exhaust fans. Smoke exhaust fire dampers are required at the junction of each layer of smoke exhaust main pipe and smoke exhaust main pipe. Sometimes smoke exhaust fire dampers are also required at the junction through firewalls. Then, it is very likely that the smoke exhaust fire damper of the fire layer and the riser will be closed first, then whether the fan will be interlocked with the valve.

If the fire exhaust fan is not closed, there is no open smoke exhaust channel in the system. Is it wrong for the fan to continue to work.
1, the fire exhaust fan in the fire exhaust fan inlet manifold should be set when the flue gas temperature exceeds 280 ℃ can be closed by itself, the valve should be interlocked with the exhaust fan, when the valve is closed, the fire exhaust fan should be able to stop working.
2. There are two conditions for setting fire dampers (fire dampers that can be closed by themselves when the smoke temperature exceeds 280 ℃) for smoke exhaust pipes passing through fire zones: the level of mechanical smoke exhaust system is not set according to fire zones, or the smoke exhaust fan and smoke exhaust port are not in the same fire zone. Fire dampers are set at the junction of horizontal branch pipes and straight air pipes in each fire zone when vertical pipes pass through fire zones.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong, the hometown of FRP in China. The company has Grade II qualification for fire protection facilities engineering, Grade II qualification for construction mechanical and electrical installation engineering, Grade II qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, and an axial fan invention patent, A fan utility model patent, environmental assessment, safety assessment, three simultaneous and other procedures are complete.