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90% of people don't know these 10 elevator safety trivia!

Release time：2024.10.16

As an indispensable vertical means of transportation in modern life, we deal with it every day, but how much do you know about elevator safety knowledge? Today, Xiaobian will reveal some cold knowledge about elevators.

電梯關(guān)門(mén)伸手擋住安全嗎？

Is it safe to reach out and block the elevator when it closes?

When entering and exiting the elevator, subconsciously reaching out to block the elevator door has become a habit for most people, in order to delay the elevator closing, is it really useful to do so? In fact, hands can get pinched! The elevator has a blind spot for induction, and if it is not sensed, it will continue to close the door, and the hand will be clamped. Our common elevators are divided into light curtain elevators and touch plate elevators, light curtain elevators are equipped with infrared emitters and receivers on both sides of the elevator door to sense whether there are obstructions;

Touch-plate elevators are sensed by a protruding touchplate on the elevator door. However, in fact, both elevators have certain induction blind spots, and they cannot achieve full coverage. The elevator is equipped with a special protection device to prevent the door from trapping, but the device can only be activated within 50mm of the last time the active door is closed. Therefore, blocking the elevator door with hands, feet, objects, etc. may be pinched, and it is easy to cause damage and malfunction of the elevator door.

For safety, using the elevator door button is the best choice.

When the elevator is running, why do you feel dizzy?

The dizziness at the moment of taking the elevator is caused by the change of cerebral pressure, and the elevator has a relatively large acceleration at the moment of operation, and the blood in the body produces an acceleration in the opposite direction of the elevator acceleration in the vertical direction, so that the blood pressure, especially the brain, changes accordingly, resulting in a lack of oxygen to the brain. Everyone's physical condition is different, and the sensitivity to changes in brain pressure is also different, which leads to obvious dizziness in some people and no sensation in others.

Why should passenger elevators and freight elevators be used separately?

The use of passenger and freight elevators separately is not only for beauty and speed, but also for safety. In fact, compared with the freight elevator, the load capacity and internal structure of the passenger elevator are quite different, and if the passenger elevator is used as a freight elevator, it is easy to cause eccentric load.

When transporting large goods, it is necessary to consciously use freight elevators.

Will you suffocate if trapped in an elevator?

The answer is: it must not be suffocated, because the elevator car is not a completely enclosed space. The national standard has strict regulations on the ventilation of the elevator, even when the elevator is trapped, the ventilation system is normally ventilated. In addition, the elevator car is not a completely enclosed space, and there are gaps between the components, such as the gaps between the door panel and the car wall, which are enough for human breathing. However, it is important to note that you should not shout for help for a long time, do not fidget in the elevator and exert your energy, and do not try to open the elevator door or climb out of the elevator.

The requirements of the national standard for elevator ventilation

According to the national standard "GB7588-2003 Elevator Manufacturing and Installation Safety Code", the following relevant regulations:

5.2.3 Ventilation of the hoistway

The hoistway should be properly ventilated, and the hoistway cannot be used for the ventilation of non-elevator rooms.

Note: In the absence of relevant codes or standards, it is recommended that the area of the vent at the top of the hoistway be at least 1% of the cross-sectional area of the hoistway.

8.16 Ventilation

8.16.1 The car without perforated doors shall be provided with ventilation holes in its upper and lower parts.

8.16.2 The effective area of the ventilation holes in the upper and lower parts of the car shall not be less than 1% of the effective area of the car. The clearance around the car door can be taken into account when calculating the area of the ventilation hole, but it shall not be greater than 50% of the required effective area.

8.16.3 The ventilation hole shall be arranged as follows: with a hard straight rod with a diameter of 10mm, it is impossible to pass through the car wall through the ventilation hole in the car.

Why do the lights in the elevator car turn off?

This is because the elevator activates the energy-saving device

Nowadays, many elevators are equipped with energy-saving devices. If the passenger does not press the floor button within the time set by the system after entering the elevator car, the system will default to the elevator being unused at this time, and the elevator will then enter the energy-saving mode, and the lights in the car will be extinguished. At this point, passengers only need to press any button on the control panel, and the elevator will exit the energy-saving mode and the lights in the car will be back on.

為什么電梯內(nèi)打電話信息很差？

Why is the call information in the elevator poor?

When we walk into the elevator while making a call or sending a message, the mobile phone message will be weakened or even interrupted, but sometimes the signal is not affected. This mainly depends on whether the operator's signal coverage device is installed in the elevator shaft.

Normally, the elevator shaft and the car will block most of the mobile phone communication signals, and some elevator shafts are installed with communication signal coverage devices, at this time in the elevator to make calls or send text messages will still be unimpeded, if no such devices are installed, people enter the elevator, the mobile phone signal will be weakened or interrupted.

Does pressing the elevator close button really work?

When you are in a hurry to take the elevator, you press the close button urgently but find that you can't control the elevator door to quickly respond to the door. In fact, in China, the elevator door close button can only save 1-2 seconds, because the door close button command is not in the "first priority". For example, if a passenger enters the elevator, the elevator will still interrupt the process of closing the door. In the case that the elevator door is not safely opened, pressing the close button does not work, from the time when the elevator door is fully opened, the time difference between pressing the close button to close the door directly and the elevator automatically closing the door is about 2 seconds on average.

Therefore, it is best not to press the door close button when the elevator door is not fully opened, not only will it not have an obvious effect, but it will also aggravate the wear and tear of the button.

為什么很多電梯都安裝了鏡子？

Why do many elevators have mirrors installed?

From the perspective of elevator design, the purpose of installing mirror decoration in the car is to:

1. Convenient for people with disabilities. It is difficult for wheelchairs to turn around in the elevator, and with mirrors, they can see the floor lights from the mirror without turning or turning the wheelchair.

2. Reduce claustrophobia. The enclosed and narrow space in the elevator can easily make people feel depressed, and the mirror can increase the visual space and reduce the sense of depression.

3. Prevent thieves. Mirrors can reduce visual blind spots, and safety is improved.

4. It is convenient for people to take the elevator to groom and dress properly

Can I jump in the elevator?

The impact time is short with a slight jump, and the actual impact is minimal (and it is best not to try it either). However, if the runout amplitude is too large, or it jumps when it is fully loaded, it may cause the instantaneous impact force to be too large, and the elevator load will increase dramatically instantly, resulting in damage to the wire rope and elevator failure.

If the beating amplitude is too large, or the elevator is fully loaded, even if one person jumps, the impact force increases by geometric multiples, and resonance and other effects may occur, causing the elevator to be damaged and the personnel to be trapped. The elevator wire rope is embedded in the wheel groove under normal conditions, and when the runout amplitude is too large, it may cause the wire rope to be out of the groove and cause damage to the elevator.

電梯下墜落地前起跳能起到緩沖作用嗎？

Can the elevator act as a cushion before it falls to the ground?

Actually: no way. Because you can't jump at all.

If you want to jump, you have to have a point of focus. In the process of the elevator falling rapidly, the force of the elevator is rapidly downward, and it cannot be focused at all. That is to say, when the elevator falls, the person cannot overcome the gravity of the elevator falling; Assuming that you can jump, it will also be invalid because you can't predict the start time. Suppose that it can take off at that critical moment, but because the elevator will produce a downward momentum when it falls, only by achieving an upward force of the same force can the safety of passengers in the elevator cabin be guaranteed, and this is impossible to do.

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