Fire fire smoke plays a vital role in the fire prevention system. It is mainly used to quickly discharge smoke and toxic gases when the fire occurs to ensure that personnel evacuate channels and the requirements of the staircase non -smoking.Its structure requirements mainly cover the following aspects:
1. Leaves: The wind turbines impeller structure should adopt high -efficiency and high -intensity structural type.For the axis flowers with a diameter of the impeller greater than or equal to 630mm, high -strength aluminum alloy leaves should be used to ensure its good working performance and durability.
2. Motor: The axial flow fan should be directly driven by the motor, and the motor should be directly exposed to the airflow.The centrifugal cabinet fan can be transmitted or direct transmission.The motor equipped with a fan should be a standard product of wind -cold, mouse cage type, and full -sealed humidity type. It uses full voltage startup and the insulation level is F -level.In addition, the motor of the smoke exhaust fan should meet the requirements of normal operation in the process of excluding 280 ° C to 0.5h.
3. Vibration reduction: During the equipment assembly process, the quiet balance should be preceded by the dynamic balance, and the vibration speed of the case is not more than 1.8mm/s.To ensure the stable operation of the equipment, the supplier should provide a shock absorber and a fastener bolt that supports the fan.
4. Case: The manufacturing accuracy of the shell should comply with the relevant specifications.The motor support in the case should have sufficient strength and stiffness to withstand the dynamic load generated by operation and ensure the consistency of the motor axis and the center of the case.The axial fan case should be treated with hot -dip galvanized treatment, and the average thickness of the hot -dip galvanized layer should not be less than 70 μm to enhance its corrosion resistance.
In addition, the connection between the fire to smoke and the duct is also part of the structural requirements.The smoke exhaust fans should be connected to the hose (flexible material and not burning). The length should not be less than 200mm.To ensure that the hose does not distort during the system operation, the looseness should be installed and moderate.
In summary, the structure of fire exhaust fan covers many aspects such as chips, motors, vibration reduction, and cases to ensure that it can operate stable and efficiently when the fire occurs, and provides strong evacuation and fire extinguishing work.support.
The above is the structural requirements of the fire exhaust fan