Multifunctional automatic escape fire door working principle

When a fire occurs in a high-rise building, fire doors are required to block the spread of fireworks. The multifunctional automatic escape fire door can remind people of the occurrence of fire and open the passage so that the trapped person can get out of the fire scene in time. The door can also be in the fire. Automatically shuts down when it cannot be controlled.

First, the principle of automatic unlocking the use of detectors (smoke detection alarm device), can make a rapid response to the occurrence of fire, and to remind people to escape. The automatic lock can react at the same time as the alarm and use its own power connection circuit to make the door lock open automatically to facilitate the escape of trapped persons. The specific method of operation is that, in normal use, three identical automatic locks securely lock the door. When the circuit is energized, the electromagnet generates a magnetic force, and the lock core in the automatic lock sleeve is moved downward by the magnetic force of the lower electromagnet to make the lock open. When the circuit is powered off, the magnetic force of the electromagnet disappears and the lock cylinder returns to its original position under the action of the spring force to lock the door. The automatic lock circuit will be powered off when the door is locked to prevent inconvenience to the user.

Second, the principle of automatic opening and closing door Automatic opening device can be automatically unlocked in the event of a fire, the use of the role of the motor automatically open the door. The automatic door closing device is designed to cut off the fire source when the fire is out of control and stop the spread of the fire, thus providing a safe life channel for the trapped people in the fire scene. The specific operation process is that the door opening mechanism adopts gears to transmit power. Among a group of gears, one is incomplete gear (that is, on one circular gear, half is without teeth), and the other is a standard gear. In motion, the incomplete gear and the motor shaft are fixed, and the standard gear is fixed through the connecting rod sleeve and the door. Under normal conditions, the half of the gear that is not completely geared is close to the normal gear, and the two gears are not meshed. When used normally, it is no different from pushing a door switch to a normal door. No increase in door resistance due to gears. In the event of a fire, the detector is exposed to smoke and the circuit is switched on. The motor rotates in the forward direction to bring about incomplete gear rotation. When the toothless half turns, the toothed half is close to the normal gear, and the two gears mesh to drive the normal gear to rotate so that the door fixed to the normal gear is rotated and opened. When they are fully opened to 90 degrees, the switch at the back of the door is functioning, the circuit is disconnected, and the motor stops working.

When the fire spreads and the room temperature reaches a certain value, the temperature control switch at the door is closed, so that the other circuit is turned on, and the motor reverses the movement of the door and closes the door. Preventing the spread of fire A position switch is installed above the same door frame. When the door is completely closed, the switch is activated, the circuit is disconnected, and the motor stops working. If someone is still unable to escape in time when the door is closed, a button switch is located at a certain distance from the door. Pressing this button will open the door for quick pass.

Third, the detector selection Multi-function automatic escape fire detector is very important. Its choice is directly related to whether the automatic escape can be realized well.

1. Photoelectric smoke detectors are suitable for hotels, office buildings, factories, restaurants, entertainment venues, etc., dustproof, pest control, resistance to external light interference, fire detection procedures, eliminate false positives, and can be electronically encoded.

2. The UV flame detector detects the fire by detecting the ultraviolet rays generated by the burning of the substance, and is suitable for the place where the fire easily occurs during the fire. When the room height exceeds 20 meters, conventional smoke detectors are not suitable. Flame detectors must be used.

3. Ion Smoke Fire Detector is a kind of fire detector with single source and double protection structure. It is made of exquisitely sealed process and can respond quickly and accurately to the pyrotechnics occurring in the early stage of a fire.

4. Infrared beam smoke detectors are suitable for high-rise buildings, heritage conservation buildings, auditoriums, warehouses and tunnels. Built-in single-chip microcomputer, curing fire judgment program. There is an alignment indicator on the receiver. Easy to install and debug. Launch and receive detection distance up to 100 meters.

The multi-purpose escape door uses a smoke detection alarm device, which can quickly respond to fire and remind people to escape. Use your own power to connect the circuit so that the door lock opens automatically. The automatic door device can automatically open the door by the use of the motor after the fire is automatically unlocked. The automatic door closing device can cut off the fire source and stop the spread of fire when the fire cannot be controlled.