First, what is a civil air defense door?
Just talking about civil air defense, many friends may think of the word civil air defense, which is true. The civil air defense we are going to talk about today is civil air defense. The so-called civil air defense door is the civil defense protection equipment used by * * in the implementation of rescue operations. Let's take a concrete look at the classification and characteristics of civil air defense doors.
Second, the classification of civil air defense doors
There are many kinds of civil air defense doors. Today, I mainly introduce the most commonly used in civil air defense. Let's have a look.
Category I of civil air defense doors: ordinary single-door and double-door sealed doors and sealed doors.
Ordinary single and double fans are widely used to protect sealed doors and sealed doors, and the structure is very simple.
Maintenance is also very convenient, almost all kinds of civil air defense projects will use this kind of door, but it also has some shortcomings, that is, its threshold is fixed, which is not very practical for places frequented by vehicles. Class II civil air defense doors: single movable threshold, double protective doors and sealed doors.
Single-door and double-door protection is also widely used in sealed doors and sealed doors, which makes up for the shortcomings that ordinary single-door and double-door protection is inconvenient for vehicles to pass in sealed doors and sealed doors. Generally, sealed doors and single-door and double-door protection thresholds in sealed doors are not installed, which is more convenient for pedestrians and vehicles to pass. Only under certain circumstances, the doorsill will be installed to protect and seal.
Civil air defense door type 3: sealed door, sealed door for falling protection.
Floor-to-floor double protective sealing doors and sealing doors are also convenient.
Usually for the convenience of pedestrians and vehicles, there is no threshold on the ground. Only in wartime will the door leaf pass vertically, land or translate to meet the requirements of closing. Its biggest feature is that it has a small door, which can facilitate some people who need to travel temporarily. Third, summary.
Civil air defense doors, although we don't have much contact,
But it is not without it. Many large underground buildings, hospitals, parking lots and other places will encounter it. In fact, in addition to the above categories, civil air defense doors also include rubber hose explosion-proof wave valves, suspended explosion-proof wave (mask) valves, two-way stressed double-door protective sealing doors with connection ports, fire-proof sealing doors, fire-proof sealing doors, and ramp-opening double-door protective sealing doors.