Smoke fire damper is mainly used for ventilation, air conditioning system on the duct, usually in the "normally open" state, when the air temperature reaches 70 ℃, through the valve fuse action and automatically shut down.
The smoke exhaust port and the smoke exhaust valve are mainly arranged on the pipeline of the smoke exhaust system, or installed at the suction inlet of the fire exhaust fan. It is usually closed. In the event of a fire, the smoke exhaust is automatically opened through linkage.
Fire damper installed in the smoke exhaust system and ventilation and air conditioning system at the entrance of the fan, usually in the "normally open" state, can be ventilated, when the air temperature in the pipe up to 280 ℃, the valve by fusible metal temperature fuse action and automatically shut down, cut off the air flow, to prevent the spread of fire.
There are instances of reuse of such equipment in some building fire protection projects, such as the Tobacco Building.
Tobacco building is mainly for office and business. The walkway is long and has a mechanical smoke exhaust system. There is only one smoke prevention zone on each floor. An electric normally closed fire damper is designed on the smoke exhaust main pipe on each floor of the fire damper. An electric normally closed smoke exhaust valve is designed on each smoke exhaust port on each floor. An electric normally closed smoke exhaust fire damper is also designed at the suction entrance of the fire exhaust fan. Obviously, this design has functional waste, it is also a waste of modules, valves, and construction costs.
Suggestions: One of the methods is to cancel the smoke exhaust valve and module of the smoke exhaust port, and the air outlet is changed into a single-layer louver. The second method is to change the electric normally closed fire damper on the smoke exhaust main pipe on each layer into a normally open 280-degree closed fire damper, and the control module is changed into a general monitoring module. The two methods can also meet the requirements of fire protection specifications, and the actual control is also very reliable.
The raw materials of fire control valve generally include carbon materials and galvanized plates, which are suitable for installation on the air supply and return air pipes of ventilation and air conditioning systems. They are usually open. When the smoke temperature in the pipe reaches 70 degrees, it is closed when the smoke temperature in the pipe reaches 70 degrees, and can meet the requirements of smoke leakage and fire integrity of fire dampers at a certain time, thus playing the role of smoke isolation and fire prevention.
The fire control valve shall ensure that it can continue to work for 30min at 280 ℃, the smoke exhaust valve (port) of the electric operation function shall be opened quickly and reliably when it is 15 or 10 lower than the rated working voltage, and the connection terminal shall be determined. The output end of the power cord connected to the output module shall be connected to the valve power cord. Ventilation, air conditioning and smoke prevention and exhaust systems are provided for high-rise and other modern buildings. In the event of fire, smoke expansion channel, smoke exhaust port: composed of smoke exhaust valve and louver tuyere or plate tuyere, used in the special smoke exhaust branch pipe of the rocket system of smoke exhaust system.
Fire dampers include gravity fire dampers, fire control valves, fire tuyeres, pneumatic fire dampers, smoke dampers, electronic automatic smoke dampers and other products. Smoke exhaust dampers include smoke exhaust dampers, plate smoke exhaust ports (for ceiling), smoke exhaust ports for shafts and other products. Fire dampers and smoke exhaust dampers are important components in ventilation, air conditioning and smoke control systems. What is the fire resistance of fire dampers.
The air sent by the blower must be distributed to the branch pipe through the main pipe, and the flue gas enters the exhaust fan from the branch pipe to the main pipe and is discharged. When a fire occurs in the building, in the ventilation and air conditioning system, in order to prevent the fire from extending through the air supply system, when the gas temperature in the air supply system reaches 70 ℃, the fuse on the fire damper mechanism operates, and the valve is quickly closed to cut off the passage extending along the smoke and fire, similarly, in the smoke exhaust system, when a fire occurs, the smoke exhaust valve is opened for smoke exhaust. In order to cut off the flow of high-temperature smoke in the smoke exhaust pipeline and prevent the fire from extending to another fire prevention zone, when the temperature of the discharged smoke reaches 280 ℃, the smoke exhaust fire damper and the fuse on the smoke exhaust port operate, and the valve must be automatically closed to obstruct the smoke exhaust.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level 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, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures