|
|
|
| |
Why should large supermarkets use steel fire shutter door?
Mainly used in large supermarkets (hypermarkets), large shopping malls, large professional materials market, large exhibition halls, factories, warehouses and other public places requiring fire protection. When the fire broke out, fire shutter doors in the control of the central control system of fire, according to a preset program automatically put down (down), to prevent the flame spread to other function, for the implementation of fire protection for the precious time.
Under normal circumstances, large buildings are equipped with the central fire control system according to the national fire law. When the fire occurs, installed in the roof smoke sensor (hereinafter referred to as smoke) first received the smoke signal, and the alarm to the central control system, fire control central control system through the fire doors power recognition on fire area, the fire prevention shutter fire fire shutter door domain at a certain speed down. When the shutter down to about 1.5 meters away from the ground position, stop down, in order to facilitate evacuation and evacuation. Fire shutter door in the middle to stay for a certain period of time, and then continue down, until closed. The down speed and the dwell time of the fireproof shutter door can be adjusted during installation.
In some occasions, the building is not equipped with fire central control system, fire shutter door only through the fire shutter door fire control electrical box, realize fire shutter door fire regulations, operation procedures. In this case, the fire signal received by the smoke sensor is transmitted directly to the fire control electric box of the fireproof rolling shutter door when the fire alarm occurs.
In the case of power failure, only by pulling the chain to put down the fire shutter door. Fire shutter doors equipped with manual, only one-way down, can not be promoted.
Fire shutter door production requirements higher, that requires the entire system can withstand a certain period of about 1100 degrees high temperature test, fire resistant rolling door fire time is the main index of fire rolling door. GB14102-93 steel fire shutter doors in general technical conditions for fire-resistant time prescribed four fire grades. |
| |
|
|
|
