Smoke exhaust fire damper is an important part of fire fighting. Generally, smoke exhaust fire damper can be seen on the pipeline of mechanical smoke exhaust system. It is usually open. When the smoke temperature in the smoke exhaust pipe reaches 280 degrees, it is closed and meets the requirements of fire integrity and smoke leakage within a certain period of time. It plays a good role in smoke isolation and fire prevention. Then why does the smoke exhaust fire damper vibrate during use.
1. The vibration of the bearing part of the smoke fire damper is very small when it starts to work, but with the lengthening of the running time, the dust in the smoke fire damper will be unevenly attached to the impeller, gradually destroying the dynamic balance of the smoke fire damper, so that the bearing vibration gradually increases, so it gradually begins to vibrate.
2. When the smoke exhaust fire damper vibrates and the fire damper moves close to the dangerous value, the vibration measuring instrument will give an alarm, so we should observe and adjust it in time.
3. Once the vibration reaches the maximum allowable value of 11 mm/s for the smoke exhaust fire damper (the maximum allowable value expressed by the amplitude value of the gas floor is as follows), the smoke exhaust fire damper must be stopped for repair (dust accumulation is removed and dynamic balance is redone), because it is already very dangerous at this time, so we must stop using it to avoid unnecessary losses.
Smoke exhaust fire damper is a valve that is used to block the passage of smoke and flame from the fire disaster area and can meet the requirements of fire stability and fire resistance within a certain time. In order to minimize the loss caused by fire, useful smoke exhaust fire damper should be used to control the spread of fire. The reasonable setting of fire damper and smoke exhaust fire damper in ventilation, air conditioning and smoke control system plays an important role.
The smoke exhaust fire damper shall be set on the main air duct of the air outlet of the air conditioning equipment. When the air duct crosses the fire compartment, when the air duct crosses the elastic settlement joint of the building structure, the air duct crosses the flammable workshop or room under unavoidable circumstances.
During installation, it must be noted that the smoke exhaust fire damper should be provided with supports and hangers independently to avoid pipeline deformation affecting its function in case of fire. The smoke exhaust fire damper should be installed in the air duct section close to the wall or floor. The smoke exhaust fire damper at both ends of the fire partition wall should not be more than 200mm from the wall surface. The pipeline and its insulation data within 2.0m at both ends of the smoke exhaust fire damper should be non-combustible data, the fuse plate of the smoke exhaust fire damper shall be installed on the side facing the greater risk of fire.
Operating precautions for fire damper installation.
1. Fire damper can be interlocked with ventilator and exhaust fan.
2. The operating mechanism side of the valve should have a net space of not less than 200mm to facilitate maintenance.
3. Before installing the valve, it is necessary to check whether the operating mechanism of the valve is in good condition and whether the action is flexible and effective.
4. Fire dampers shall be installed in the air duct section close to the wall or floor slab. The fire dampers on both sides of the partition wall of the fire compartment shall not be more than 200mm from the wall surface. The pipes and their thermal insulation materials within 2.0m on both sides of the fire dampers shall be made of non-combustible materials.
5. Fire dampers should be set up separately to prevent pipe deformation from affecting its performance in case of fire.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong, the hometown of glass fiber reinforced plastic in China. The company has the third-level qualification for construction mechanical and electrical installation engineering; the third-level qualification for environmental protection engineering; the safety production license; the first in the industry to pass the ISO9001 quality management system certification, ISO14001 environmental management system certification, and OHSAS18001 occupational health management system certification; an axial fan invention patent; a fan utility model patent; EIA, safety assessment and three simultaneous procedures are complete.