How to open this door in the corridor?

There are generally fire isolation doors in the corridor. There are two ways to keep them open. The first method is to block them with objects, and the second method is to remove the door closer on the door.

Fire doors can prevent the spread of fire and smoke, prevent the spread of fire in a certain period of time and ensure the evacuation of people, so it is best to keep them closed.

Normally closed fire doors are most commonly used, and their doors are always closed, which are manually opened when people pass through and automatically closed after passing through; If push lock hardware is installed, it will be more conducive to speeding up evacuation. However, the normally closed fire door located in the public passage has some shortcomings, such as affecting ventilation and lighting, blocking the line of sight, inconvenient passage and so on. For example, due to poor management, its door closers and opening and closing hardware are often damaged and out of order, resulting in potential safety hazards.

Normally open fire doors can solve the above problems:

Normally open fire doors are kept open at ordinary times, which is convenient for people to pass, ventilate and light, and can be automatically closed in case of fire, thus playing the role of smoke prevention and fire prevention. Therefore, the inconvenience caused by the normal closing of the fire door to the passage of people and the man-made damage caused by the frequent opening and closing of the fire door are completely solved, and the fire safety is ensured at the same time.

Normally open fire door is a normally closed movable fire door with a normally open fire door release device. The normally open controller outputs DC24V working voltage to the electromagnetic door stopper release device of the fire door, so that electromagnetic door stopper can attract the door leaf of the fire door to locate and keep the door in a normally open state.

In case of fire, the controller is often turned on after receiving the fire linkage signal or smoke detector signal, so that the electromagnetic door stopper is cut off and the door body is released. The left and right doors of the controller are powered off respectively (the delay is about 6 seconds), and the left and right doors of the fire door are closed in turn under the action of the fire door closer. At the same time, the controller feeds back the release action signal, and if it is necessary to feed back the fire door closing signal, the door collision switch is added.

Refer to the above? Baidu encyclopedia-fire door

Refer to the above? Baidu encyclopedia-always open fire doors