1. Because it is impossible for people to close the door when a fire occurs, the fire door must be automatically closed and an automatic door closer must be set. At present, automatic door closers are divided into oil pressure type and spring type. Most of them are oil pressure type door top spring and single tube spring hinge for one-way opening of fire doors. It should be noted that this type of automatic door closer should not be installed on one side of the fire surface by mistake to avoid being damaged by high temperature in case of fire. At ordinary times, the automatic door closer should be sensitive and effective, and should be replaced in time once it is damaged.
2. Fireproof doors that are normally open must be equipped with fixed devices to facilitate passage. Generally, electromagnetic release switch or fusible alloy is set to fix the door on both sides of the wall. In case of fire, the power is cut off and the magnetism is lost (or the lock tongue is sucked open by energizing and generating magnetism) or the alloy is burned. The door will automatically close under the action of the spring. It is worth noting that hooks or door cards cannot be used to fix the fire doors, because people in panic will not close the doors in case of fire, which will lead to smoke and fire entering, thus making the walkways and stairwells lose the role of safe evacuation.
3. Fire doors in stairwells specially designed for evacuation are usually locked in use for anti-theft. In order to solve the problem of both fire prevention and theft prevention, electromagnetic door locks can be used for such fire doors. The personnel in this building can use the key to open and enter. In case of fire, the smoke detector linkage or remote control of the fire control room will connect the circuit. The lock tongue will retract under the action of magnetic force, and the door can be pushed open. A simple mechanical push bar door lock can also be set, which can be opened at any time by pushing the door from the inside. The back door will spring back and close when people go out, and the key will be used to open when entering from the outside, so that the perpetrator can be prevented from entering the building.
4. Some double fire doors have a bite for sealing. If the sequence is reversed when closing, it cannot be closed tightly. Therefore, a sequencer must be set to control the steps before and after closing the door leaf. Henan fireproof rolling shutter door
5. If the door handle of the fire door must be turned by hand to open, it may be unable to open the door because it is burned in the fire. For this reason, push rod type door locks should be used, and fire doors can be opened only by pushing or squeezing.
6. The carpet or indoor furnishings shall be prevented from blocking the fire door to ensure its normal use in case of fire.
