Fire doors and fire shutters follow the development of modern intelligent buildings

With the development of modern intelligent buildings, there are more and more high-rise buildings with larger and larger areas. If the control methods of fire doors and fire shutters are not set correctly, once a fire occurs, the fire will spread very quickly. It will cause heavy losses to people's lives and property.
In buildings equipped with automatic fire alarm and linkage control systems, how to set up the linkage control of fire shutters and fire doors is an important link in measuring the quality of the automatic fire protection system, which directly affects the entire fire protection system and the fire extinguishing process. Success or failure, the author will now talk about some of the opinions we have summarized in practical work.
An electric fire-proof roller shutter
The "Design Code for Automatic Fire Alarm System" stipulates that the fire-proof roller shutters in relevant parts should be closed after the fire is confirmed. In the system design, the AND door signal after the simultaneous alarm of a detector group or two different types of fire detectors is used as confirmation of fire. It can be seen that according to the "Design Code for Automatic Fire Alarm System", if two or more smoke detectors alarm at the same time, the roller shutter can be lowered. People have not been evacuated in the early stage of the fire. Obviously, this is caused by the roller shutter being closed too early. of. If two different types of detectors, such as a smoke detector and a temperature detector, alarm at the same time, and then the roller shutter is lowered, then in the early stage of the fire, a large amount of smoke will pass through the roller shutter. Obviously, the roller shutter cannot be closed properly. Too late again. The author believes that a reasonable control method should be selected according to the different places and uses of fire-proof roller shutters
For fire-proof roller shutters installed in fire protection zones for fire separation
Since the fire-proof roller shutters installed here The curtain does not affect evacuation in a fire emergency, so a one-step control method can be adopted. Taking the fireproof roller shutters around the escalator as an example, one or two dedicated smoke detectors can be installed outside each roller shutter. When programming, it is designed that any two special smoke detectors form a door alarm and link the surrounding fire shutters to lower to the bottom in one step. At this time, there is no smoke and temperature sensor probe set to simplify the system and reduce the cost.
Fireproof roller shutters installed on evacuation channels
After a fire occurs, people need to evacuate through evacuation channels. Since in fire emergencies, people tend to panic, if the evacuation route is blocked due to the closure of the roller shutters Being blocked will increase people's panic and lead to unexpected casualties, which is not conducive to safe evacuation and is not conducive to firefighters entering the fire scene to put out the fire. Therefore, roller shutters should be avoided as much as possible on evacuation passages and replaced with fire doors.
If a fire-proof rolling shutter must be installed on the evacuation passage, it should comply with the "High-level Regulations". The fire-proof rolling shutter installed on the evacuation passage should be equipped with opening and closing devices on both sides of the roller shutter, and have automatic manual and mechanical control. Function. According to the requirements, the linkage design should adopt a two-step controlled falling method, that is, two dedicated smoke and temperature detectors should be installed on both sides of the rolling shutter. The first time, the smoke detector will control the falling distance to stop. Prevent the smoke from spreading to another fire zone, and the second time it is controlled by the temperature detector to prevent the fire from spreading
In addition, due to the importance of the fire shutter, only setting up program linkage control is not enough to ensure reliable action. To meet the safety requirements, the fire shutters should be centrally managed in the fire control room, and a control button for manual emergency lowering of the fire shutters should be provided.
Two fire doors
Normally open fire doors on evacuation passages
In addition to ordinary door closers and sequencers, normally open fire doors are particularly required to be equipped with a fire door release switch. When fire prevention After the smoke detector on either side of the door is activated, the linkage module turns on the coil of the fire door release switch to release the locked fire door. You can also forcefully pull it out by hand to release the fire door. The fire door is controlled by the door closer and sequence It automatically closes under the action of the detector, thereby blocking the fireworks, and at the same time, the signal that the fire door is closed is fed back to the fire control room.
Among the normally closed fire doors, fire doors must have anti-theft functions
For some evacuation passages, unit managers usually require anti-theft and security. Normally closed fire doors need to be locked. If there are no fire protection technical measures , once the door is locked, people will not be able to evacuate in the event of a fire, leading to tragic disasters. Such examples are quite common. At present, such safety hazards still exist in large numbers. It is not that fire prevention inspections are not in place, but that anti-theft security is also very important to managers. It is difficult for managers to cooperate with the inspectors’ request to ban the locking of fire doors. In this case, fire prevention The door must take linkage control measures.
Those with simple functions can be equipped with push-latch electromagnetic locks, and those with complex functional requirements can choose safe evacuation door controllers. Such products usually use electromagnetic locks to lock the door and have anti-pry alarm functions. When a fire occurs, the fire linkage module can be used to control the safety evacuation door controller to open the fire door, and the dedicated safety evacuation door controller will send out an audible and visual alarm signal to guide people to evacuate. There is also a fire hydrant button on site. In an emergency, personnel can break the glass and directly activate the safety evacuation door controller to open the fire door and send out an audible and visual alarm signal. A safety evacuation door controller can control the fire door below.
If you have any questions about fire doors, we will try our best to answer them for you. For more details, please visit the official website of Shenzhen Tongxiao Industrial Co., Ltd. or consult the relevant staff