Knowledge of the working principle of fire dampers


The working principle of the fire valve is to use the temperature of the extremely fusible alloy to control the opening, and use the action of gravity and the action of the spring mechanism to close the valve. When a fire occurs, the flame invades the air duct, and the high temperature melts the fusible alloy on the valve, or deforms the memory alloy to make the valve automatically close. The fire damper is a smoke exhaust valve installed on the pipeline of the smoke exhaust system. Usually, the smoke exhaust valve is normally closed. When a fire occurs, a continuous large amount of smoke detection information is detected by the smoke detector set in the floor area, and the smoke exhaust valve is opened in linkage. And feedback signal to the fire monitoring host, linked to open the smoke exhaust fan in the corresponding area to achieve the purpose of smoke exhaust. The fire valve is installed on the supply and return air pipelines of the ventilation and air conditioning systems. It is usually open. When the gas temperature in the pipeline reaches 70 °C during a fire, the fusible sheet is blown, and the valve is automatically closed under the action of the torsion spring. A valve that can meet the requirements of fire resistance stability and fire integrity within a period of time, and play the role of smoke and fire resistance. When the valve is closed, a close signal is output. and made great progress. However, the long wavelength region of solar energy has not been fully utilized. Among the fuels of automobiles, gasoline is the main fuel. In the internal combustion system of a car, polluting gases after use are discharged. If the heat energy in the solar energy is changed into the “activation energy” for producing hydrogen from methane and water, the smoke exhaust fire damper is installed on the pipeline of the smoke exhaust system, which is usually closed, and is manually or electrically opened in the event of a fire to exhaust smoke. , When the temperature of the flue gas in the exhaust pipe reaches 280 ℃, it is closed, and it can meet the requirements of fire resistance stability and fire integrity within a certain period of time, and play the role of smoke exhaust valve.
The fire damper is installed on the supply and return air pipelines of the ventilation and air-conditioning systems. It is usually open. When the gas temperature in the pipeline reaches 70 °C during a fire, the fusible sheet is blown, and the valve is automatically closed under the action of the torsion spring. A valve that can meet the requirements of fire resistance stability and fire integrity within a period of time, and play the role of smoke and fire resistance. When the valve is closed, a close signal is output. and made great progress. However, the long wavelength region of solar energy has not been fully utilized. Among the fuels of automobiles, gasoline is the main fuel. In the internal combustion system of a car, polluting gases after use are discharged. The automatic smoke exhaust and fire damper acts on the fire prevention of the ventilation and air conditioning systems of the subway. The smoke exhaust valve has the function of linkage control with the automatic fire alarm equipment and the gas fire extinguishing system. Each fully automatic smoke and fire damper has two independent electric control signals, which are monitored by EMCS and gas elimination system respectively, and great progress has been made. However, the long wavelength region of solar energy has not been fully utilized. Among the fuels of automobiles, gasoline is the main fuel.
The heat energy in the solar energy is changed into the “activation energy” for hydrogen production from methane and water. The smoke exhaust fire damper is installed on the pipeline of the smoke exhaust system. It is usually closed at ordinary times. It is manually or electrically opened in the event of a fire to exhaust smoke. When the flue gas temperature in the flue gas exhaust pipe reaches 280℃, it is closed, which can meet the requirements of fire resistance stability and fire resistance integrity within a certain period of time, and play a role in exhaust gas. The automatic smoke exhaust and fire damper acts on the fire prevention of the ventilation and air conditioning systems of the subway. The smoke exhaust valve has the function of linkage control with the automatic fire alarm equipment and the gas fire extinguishing system. Each fully automatic smoke and fire damper has two independent electric control signals, which are monitored by EMCS and gas elimination system respectively, and great progress has been made. However, the long wavelength region of solar energy has not been fully utilized. Among the fuels of automobiles, gasoline is the main fuel.

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