The fire door must be maintained during use, so that its fire performance will not be reduced and its service life will be long. Let’s take a look at the following introduction.
1. Since it is impossible to close the door by hand in the event of a fire, the fire door must be automatically closed and an automatic door closer is required. At present, the automatic door closer is divided into two types: hydraulic type and spring type. The former has a buffer oil pump to make the door close slowly. For fire doors, most of them are hydraulic door top springs and single-tube spring hinges that open in one direction. It should not be ignored that this type of automatic door closer should not be installed on the side of the aisle (fire surface) by mistake. In order to avoid high temperature damage in the event of a fire, it must be sensitive and effective at ordinary times, and replaced in time if it is damaged.
2. Fire doors that are normally open must be equipped with fixing devices to facilitate passage. Generally, electromagnetic release switches or fusible alloys are installed to fix the doors on both walls. When a fire is The lock tongue is sucked open) or the alloy is melted, and the door is automatically closed under the action of a spring. It is worth noting that hooks or door cards cannot be used to fix the door. People who are panicked during a fire will not close the door and easily enter the fireworks. Make the walkway and stairwell lose the role of safe evacuation.
3. The stairwell fire door designed for evacuation is usually locked in use to prevent theft. In order to solve the problem of both fire prevention and theft, electromagnetic door locks can be used: personnel in this building use a key to open and enter, and smoke in the event of a fire Sensor linkage or remote control of the fire control room to connect the circuit, the lock tongue is retracted under the action of magnetic force, the door can be pushed open, or a simple mechanical push lever door lock can be installed, any time only one Push to open, the door rebounds and closes when people go out, and when entering from the outside, it needs to be opened with a key, so it can prevent the perpetrator from entering the building.
4. Some double-leaf fire doors have a bite for airtightness. If they are closed, they cannot be closed tightly. Therefore, a sequencer that controls the steps before and after the door is closed must be set.
5. The door handle of the fire door, if it must be turned by hand to open it, it may not be able to open the door due to being burned during a fire. For this reason, a push rod type door lock should be used, which only needs to be pushed or squeezed by the body. Turn on.
6. Prevent the carpet or indoor furnishings from jamming the fire door, and ensure that it opens and closes quickly in the event of a fire.
