Attention of fire doors in the use and maintenance of devices

Attention of fire doors in the use and maintenance of devices

1. Since it is impossible to close the door in case of fire, it is necessary to actively close the fire door and set an active door closer. At present, the active door closer is divided into oil pressure type and tension spring type. The former has a buffer oil pump to slowly close the door. Those used for fire doors are mostly one-way open hydraulic door top tension spring and single tube tension spring hinge. What cannot be ignored is that this kind of active door closer should not be installed on the side close to the aisle (fire surface) by mistake to avoid being damaged by high temperature in case of fire. It is usually necessary to ensure that it is sensitive and useful, and replace it in time in case of damage.

2. It is necessary to set fixed devices for fire doors that are normally open to facilitate passage. Usually, an electromagnetic release switch or fusible alloy is set to fix the door on the two end walls. In case of fire, the power is cut off and the magnetism is lost (or the lock tongue is sucked off by energizing and generating magnetism) or the alloy is melted, and the door is actively closed under the effect of tension spring. It is worth noting that hooks or door cards cannot be used to fix the door. In case of fire, flustered personnel will not close the door and are easy to escape into fireworks, so that the walkways and staircases will lose the effect of safe dispersion.

3. The fire door of the stairwell is specially used as a scattered fire door, which is usually locked in use for anti-theft. In order to deal with the problem of fire prevention and anti-theft, electromagnetic door lock can be selected: the personnel of this building open and enter with the key. In case of fire, the circuit is connected through the linkage of smoke detector or remote control of fire control room. The lock tongue retracts under the effect of magnetic force, and the door can be pushed open. Perhaps, a simple mechanical push bar door lock can also be set. At any time, it can be opened as soon as it is pushed. When people go out, the back door will rebound and close. When entering from the outside, it needs to be opened with a key, so the perpetrator can be avoided from entering the building.

4. Some double leaf fire doors have bite openings for sealing. If they are closed in reverse order, they cannot be closed tightly. Therefore, a sequencer must be set to control the process before and after the door leaf is closed.

5. If it is necessary to roll the door handle of the fire door to open it, it may be unable to open the door due to burning in case of fire. For this reason, it is advisable to use the push rod door lock, which can be opened only by hand pushing or body kneading.

6. The fire door shall be prevented from being stuck by carpets or indoor furnishings to ensure that it can be opened and closed quickly in case of fire.

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