Many people are worried that the elevator will suddenly fall during operation, but in fact, although? Did the elevator drop? This is a common problem, but the elevator didn't really fall down.
? Did the elevator drop? Generally, there are two situations:
1、? Emergency stop during elevator operation
Generally, this is because the safety loop or door lock loop is disconnected during operation, which leads to the elevator stopping and passengers will feel numb in their legs. Actually, it was caused by the sudden stop of the elevator.
2、? When the elevator fails in operation, it will automatically return to the base station for reset.
And misunderstood by most people? Did the elevator drop? The probability of this happening is similar to the probability of 5 million in buying lottery tickets.
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Will the steel wire rope of the elevator break?
Some articles on the internet explain? Under normal circumstances, the sudden fall of the elevator is caused by the fracture of the wire rope pulling the elevator? Makes people feel that the wire rope is easy to break?
In fact, this kind of wire rope is not as fragile as you think. Elevator cars are all pulled by wire ropes. The greater the load, the more wire ropes there are. The elevators in ordinary residential buildings have at least three steel wires, each with about 10 small steel strand, and each steel strand with 10 steel wire. As long as one strand is broken, the whole line must be replaced. In theory, the bearing capacity of a steel wire rope is enough, so don't be afraid if two wires are broken and only one is left. Moreover, the probability that the wire rope is completely broken is really almost zero.
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Can you save yourself if you are trapped in the elevator?
Don't try to open the door to save yourself except calling for help. There have been many examples of casualties caused by self-help failure, so don't be the next one.
This method of self-help is discouraged.
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Will you suffocate if you are trapped in the elevator?
We often see this sentence? If you are trapped in the elevator, you must calm down first, because in the limited space of the elevator, the amount of oxygen is limited, and when you are calm, your body consumes less oxygen, so try to stay calm, so that the trapped person will not suffocate due to lack of oxygen in a short time. ?
But in fact, the elevator car is not a closed space, so there is no danger of suffocation.
But you still have to stay calm.
Force can't solve the problem?
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When the elevator fell. Press the button on each floor quickly? Is it useful?
If the elevator is running, the floor button is useful. The elevator is not broken at all. If the elevator fails, it will automatically return to the base station for reset. At this time, it is of little use to press each floor once. Some elevators will open doors near the flat floor, while most elevators will return to the base station to reset. It is generally impossible to press the floor at this time.
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? Try to squat with your back against the wall when the elevator falls freely? Is it useful?
If it is a free fall, any posture is useless (see the next article); If it's just an abnormal fall, this can cushion joint dislocation.
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Can you avoid death by jumping instantly before the elevator hits the ground?
First of all, you can't jump, because you need to overcome the gravity of the elevator descent;
Secondly, even if you jump up, you will land sooner or later;
Third, even if there is a glimmer of hope in theoretical calculation, a practical problem: how to know when to take off?
Finally, the elevator fell out of control (free fall). Whether you jump or not, you are basically dead.
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Are escalators safer than elevators?
Compared with elevators, escalators are more prone to accidents, so be more careful when using escalators. Step on the accelerator when you see it, and get off when you arrive; Holding handrails to keep standing steady; Ladies, please pay attention to long hair and skirts; Children pay attention to rubber foam shoes; Please use the elevator to push the stroller to transport the goods; Pick up a pet. The elevator is not a playground. Take care of the children around you.
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How do you feel that there have been many elevator accidents in recent years?
This may be the illusion brought by media reports. The elevator is the safest vertical means of transportation, and there is no one. The annual accident rate is only a few parts per 100,000, and more than 80% are human factors. For example, in the process of installation and maintenance, no safety warning was given and people accidentally fell into the shaft.
In fact, elevators have the most safety devices. Through the first-level and multi-level safety control of wire rope, the safety factor is above 12, ensuring that even if there is only one wire rope, it will not fall off the ladder; In the second stage, the speed limiter controls the abnormal elevator pace, triggers the action of safety tongs and clamps the guide rail; In the third stage, limit switches, limit switches at the top and bottom of the shaft. When the elevator rushes to the top or squats to the bottom, the limit switch acts to trigger the traction machine to close the brake and prevent the car from continuing to run; In the fourth stage, the buffer is equipped with an oil pressure buffer at the bottom pit and the top (usually the bottom) to ensure that it will not directly hit the ground when falling (by the way, the buffer is in the middle, don't stand in the middle). Moreover, in order to prevent brake failure and accidents when slipping, there are patents such as braking force detection and self-help when slipping.
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Finally, Tadpole Jun also reminded everyone that these bad habits must be changed! Change it! Change it!
? When the elevator door is closing, stop it with your hands and feet.
Reach out and poke when the elevator door is not closed.
Put your things in the gap to prevent the door from closing.
Press the button repeatedly or once per floor.
? Hold the elevator door with your hands when you take the elevator.
Lean against the elevator door when operating.
Smoking, discarding cigarette butts or using open flames in the elevator.
Pull the door by hand before opening the elevator door.
Retrograde, climb, play, lean or compete.
The children were put in trolleys and shopping carts and walked up the stairs.
When the escalator stops running, it is used as a staircase.
Squat on the pedal and put the carrying bag on the pedal or handrail.
Stay at the entrance and exit of the escalator for a long time.
I have been playing with my mobile phone when I took the elevator.
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Only by taking scientific preventive measures can we travel safely.
Thanks to the elevator experts in Zhihu (@ Chen Zhuokai @ Chen Xiaoxiao @ Modala @ Wang) for sharing. If you have any questions, you can continue @ them or @ Tadpole Jun.
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Author: Tadpole Jun comprehensive finishing