The working principle of the Fire-proof Valve is to use the temperature of easily fusible alloy to control the opening, and to close the valve by the action of gravity and spring mechanism. When the fire occurs, the flame invades the air passage, the high temperature causes the fusible alloy on the valve to melt, or causes the memory alloy to have the distortion to cause the valve to close automatically, is used for the occasion which the air passage and the fire prevention section penetrates.
The fire protection valve is installed on the smoke exhaust system pipeline, usually the smoke exhaust valve is often closed, when the fire occurs, through the smoke detector installed in the floor area to detect a large number of continuous smoke information, to open the smoke exhaust valve, and feedback signal to the fire monitor host, linkage to open the corresponding area of the smoke exhaust fan, to achieve the smoke exhaust purposes.
The fire valve is installed on the supply and return air pipe of the ventilation and air-conditioning system, which is usually in an open state. When the gas temperature in the pipe reaches 70 °C in fire, the fusible Frit will be fused, and the valve will automatically close under the action of the torsion spring force In a certain period of time to meet the fire-resistant stability and fire-resistant integrity requirements, the role of smoke-resistant and fire-resistant Valves. When the valve is closed, the closing signal is output.
The automatic smoke exhaust and fire prevention valve acts on the fire prevention and smoke exhaust valves of the ventilation and air conditioning system of the underground railway, and has the function of linkage control with the automatic fire alarm equipment and gas fire extinguishing system. Each automatic smoke and fire valve has two independent electric control signals, which are monitored by EMCS and air-extinguishing system, and great progress has been made.
In the fuel of automobiles, the main fuel is gasoline. In the internal combustion system of a car, exhaust gases are emitted after use. If the heat energy in the solar energy is changed into the “activation energy” of hydrogen produced from methane and water, the smoke exhaust fire-proof Valve is installed on the pipeline of the smoke exhaust system, which is normally closed, and is opened manually or electrically in case of fire, playing the role of smoke exhaust When the flue gas temperature reaches 280 °C, the valve can meet the requirement of fire-resistance stability and fire-resistance integrity in a certain time.
Post time: Jul-28-2021