Recently, a number of accidents caused by fires caused by electric vehicles** have once again sounded the alarm for people. In the face of a fire in the corridor, how to escape, and what skills are there in the escape process? On March 6, Hangzhou Fire simulated an electric vehicle in the corridor in a building to be demolished in Fuyang District, and the scene gave the reporter a "lesson".
The first part of the experiment was to determine which was better, wearing an escape mask or using a towel to prevent smoke.
Before the start of the experiment, the firefighters parked an electric car in the corridor on the first floor to truly restore the scene of the electric vehicle charging in the aisle and igniting the electric bicycle**, and the experimental team escaped by using a filter mask and using a towel to escape for testing.
As the battery car was ignited, the intercom came with a simulated escape command: "The corridor has been filled with smoke, you can start a simulated escape." "Visitors began to use different methods, shuttling through the smoke-filled corridors, groping their way to escape.
At that time, the situation was about 2 and a half minutes after the escape drill was carried out, and as soon as the door was opened, thick smoke poured into the room, and we chose an evacuation direction with relatively large smoke at the beginning, but although the wet towel could block some of the smoke, the nose and throat were already very uncomfortable, and the smoke also caused irritation to the eyes, making people unable to open their eyes. At the end of the experiment, one of the participants took a big breath of fresh air outside, "Seeing that there was no way to move forward, we had to retreat and choose a channel with relatively thin smoke, even if the wet towel covered the mouth and nose, it would still inhale toxic gases." ”
In contrast, the experiencer who wears a smoke mask completes the escape experience smoothly. Hangzhou Fire and Rescue Detachment Yang Boxuan told reporters that in such a situation, there is no smoke protection personnel are absolutely not able to cross the smoke, involved in danger, may be in danger of life, if a fire, once found that the escape route on the passage has been covered by smoke, do not continue to adventure, should immediately stay away from the smoke, hide in the room that has not been invaded by the smoke, close the door, and wait for rescue.
So is it safe to stay in your room and wait for rescue? When is it safer?
Firefighters then began a second experiment to test the importance of using fire doors.
The lit battery car in the corridor is still burning, and the reporter can intuitively see at the scene that in less than 2 minutes of the electric car, the smoke quickly spread to the entire evacuation stairwell.
In the room without a fire door, the reporter found that a large amount of black smoke in the room gathered on the ceiling, and in the process of accumulation, the smoke began to sink. After just 3 minutes, the area of the room that was more than 80 centimeters above the ground was covered in thick smoke.
At this time, there was no obvious smoke intrusion in the room with a fire door across the wall from the reporter. "You can smell the smoke, but you can't see the smoke. Said the person in the room.
After about 4 minutes of support in a room without a fire door, the reporter finally escaped with the assistance of firefighters. In the room with a fire door, the experiencer said that the smoke began to invade about 8 minutes after **, and the speed of invasion was relatively slow, and about 12 minutes after **, the experiencer chose to escape.
The safest is in the room closest to the entrance of the ** building, there are two doors in this room, one door is a fire door, and the other is an ordinary household door.
* After that, everyone blocked the door of the house with towels, and then hid in the innermost side of the second door, and there was a ventilation window in the room. "This group of experiencers chose to escape about 18 minutes after **. "Actually, the smoke in the room is not serious, and I can stay longer in an emergency. The experiencer told reporters.
Firefighters said that when a fire really occurs, fire doors and doors can effectively block the spread of fire and smoke within a certain period of time when a fire occurs. Also remember the words "run on a small fire, close the door on a big fire". If you feel that the external environment is bad and the visibility caused by thick smoke is very low, and it is not enough to escape from the corridor, you should return immediately, and use wet towels, sheets and other items to block the cracks of doors and windows after closing the door, so as not to let the smoke invade the room as much as possible.