Advantages of fire doors and problems in development
Fire door is a popular door in recent years. How much do you know about the maintenance, advantages and development of fire door? The following section will provide you with a comprehensive knowledge of fire doors, so that you can better understand fire doors. Fireproof door is a kind of movable fireproof partition. In addition to the function of ordinary door, it, together with the frame, can meet the requirements of fire resistance stability and integrity within a certain period of time. It has special functions of fire prevention, smoke separation and high temperature blocking. In case of fire, it should have self closing and signal feedback functions.
（1） Advantages of fire door
In case of fire, the fire doors and windows can be automatically closed through the linkage control system when they are in the open shoulder state, effectively ensuring the reliable closing of the fire door maintenance in the fire, so as to achieve its due role in smoke and fire prevention. There is no big difference between the maintenance of fire doors and the maintenance of normally closed fire doors in terms of production and basic configuration, but the door closers for the maintenance of normally closed fire doors are replaced with automatic fire release devices that are linked with the automatic fire alarm. At the same time, they can be installed with the control box produced by the manufacturer. Linkage is achieved by installing smoke detectors and smoke detectors on the left and right sides of the maintenance of fire doors, When the smoke detector detects the smoke signal and sends it to the host computer of the automatic fire alarm linkage control system, the linkage control system transmits 24v power to the fire door maintenance releaser to automatically close the fire door for maintenance. The closing or opening status of the fire door maintenance has signals fed back to the alarm host computer or control box. The automatic release device for fire door maintenance developed by Dong Shicong of Chengdu Huili University Research Institute can open the fire door maintenance for 0-180 degrees freely and close it smoothly, completely changing the disadvantage of inconvenient use of the normally closed fire door maintenance closer due to its large opening angle of 90 degrees, and once the fire door is closed for maintenance, the release device will not be reset, It has become a movable fire door maintenance that automatically opens, closes, opens and closes, overcoming the contradiction that normally closed fire doors must be manually closed or cannot be closed after being pushed to a certain limit (greater than 90 degrees) for maintenance; The lesson of blood proves that people who escape from a fire simply cannot close the opened fire door for maintenance due to panic and eagerness to escape.
（2） Practical problems encountered in the development of fire doors
Fireproof doors and windows certainly have its advantages, but due to many factors, the maintenance of fireproof doors has not been widely used. First, because of the corresponding high development and production costs and high prices, many units can not afford to install fireproof doors for maintenance; Second, because there is no mandatory provision in the code, there is no clear provision on what department and why fire doors must be used for maintenance, which is not easy to promote, resulting in limited development of fire door maintenance; Third, the installation process is more complicated than the maintenance of normally closed fire doors, and the participation in linkage is also a major factor restricting their use. The author suggests that fire door maintenance should be set in closed stairwells, fire protection stairwells, fire elevator lobby, shared lobby and walkways that are frequently used but cannot guarantee the maintenance of normally closed fire doors. When revising relevant fire protection design specifications, fire door maintenance should be included in the specifications and emphasized as a mandatory provision, This will pave the way for the maintenance of fire doors to ensure the smooth evacuation of people in the fire.
