Fire valve
Generally located in the ventilation air -conditioning pipeline through the fire zone.When the fire is turned on, the fire is closed to cut off the cigarettes and the fire along the ventilation pipeline to other fireproof partitions.This type of wind valve is divided into the following 3 categories:
1. Fire valve that drives the movement of the valve body by the temperature fuse installed in the valve body.The easily melting piece or the fuse of the fuse of the temperature fuse is 70 ° C. This type of fire valve is used.Pay special attention when installing, the temperature fuse must be installed in the direction of the air flow.When the fire prevention valve has a regulatory function, it is also called the fire prevention regulating valve.
2. Fire valve linked by the temperature sensor located in the ceiling.This type of valve is used less in China.
3. Fire fire valve linked from the ceiling.This type of valve is usually also called smoke prevention valve.
According to the project needs, some fire valves have both temperature fuse and linkage with linkage. Such valves are called smoke -proof fire prevention valves.In the system, some rowing air outlets are set on the stem pipe.When the smoke is exhausted, the air outlet should be closed. At this time, the fire prevention air outlet composed of a firewood valve and the louver air outlet can be adopted.
Smoking valve
This type of valve is located on a dedicated flue discharge or a fan, and is set according to the smoke -proof partition.There are mainly the following 3:
1. Tobacco discharge valve
Regarding the use of supporting wind channels in the smoke -proof partition, the smoke exhaust valve is often opened, and due to the uncertainty of the fire zone, the smoke exhaust valve should be open and closed, so an electric type should be used.
In the fire -proof partition, the fire center can control the smoke exhaust valve in the area to open the smoke discharge valve, and the smoke exhaust valves in other partitions can be closed.
If the branches in the smoke -proof partition are not available, that is, a special smoke discharge and stop tube on the original wind channel. At this time, the smoke exhaust valve on the smoke -exhaust support pipe is a normal -closed and linked electromagnetic manual reset valve.The same is true of the smoke exhaust valves in non -use smoke exhaust systems.
2. Tobacco
It consists of a tobacco valve and a shutter or plate -type air outlet, which is used on a special smoke exhaust support for the system of the smoke exhaust system rocket.
3. Toneral fire prevention valve
The temperature fuse of the 280 ° C fuse is installed on the smoke exhaust valve body to form a smoke discharge fire prevention valve.When the temperature of the smoke reaches 280 ° C, the temperature fuse moves, the valve is closed, and the smoke is stopped.Tip: In addition, a fire prevention valve or fire prevention regulating valve should be set at 280 ° C and closed at the wall surface of the smoke tube or the wall of the fans to block the spread of the fire.
Positive Purchase
The front room positive pressure outlet is composed of the normal -closed electromagnetic multi -leaf regulating valve plus the louver air outlet, and each layer is set.During the fire, the fire center is generally controlled by the fire layer and the corresponding upper and lower layers to open the pressure and manually reset.Electric type can also be used, controlled by the fire center.
The staircase room mostly uses vertical shutters as a positive pressure outlet, but the fire control center cannot monitor the opening and closing conditions of the air outlet.For this reason, it can also be selected in the form of the front room, and the fire center can be controlled by the fire center.
Classification of smoke exhaust products
1. Firewood valve: Fire is the fire prevention. The temperature fuse of 700 ° C is automatically closed and can be connected to the ventilation and air -conditioning system duct;
2. Tobacco prevention and fire valve: Relying on smoke -sensing control operations, electric shutdown (smoke -proof), or 700 ° C temperature fuse automatically shut down (fire prevention) for ventilation and air -conditioning system ducts.
1. Tobacco discharge port: electric, manual or long -distance opening, link with smoke exhaust fans, can be set up at 2800 ° C to close the device for ceiling or walls in the smoke discharge area;
2. Tobacco discharge valve: electric or manual turn on, linked to the smoke exhaust fan for the smoke exhaust system air duct;
3. Tobacco and fire prevention valve: Electric or manual turn on, 2800 ℃ melted and closed, used for smoke exhaust fans into the pipeline of the mouth;
4. Tobacco discharge windows: Relying on smoke to control the action, the electric is turned on, and it can also be turned on from a long distance. It is used on the outer wall of the natural smoke.
The above is the distinction between fire valve and smoke fire prevention valve