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Elevator Safety Question And Answer
- Jul 24, 2018 -

It is an indispensable vertical transportation tool in elevator-type high-rise buildings. It is a large-scale and comprehensive equipment for mechatronics. In order to ensure its safety and reliability, elevators set preventive measures from various aspects, such as electrical safety devices and mechanical safety devices. Among them, the electrical safety devices include: power supply control protection devices, power supply phase sequence protection devices, door lock electrical interlock devices, emergency stop switches, overspeed protection switches, overload protection switches, limit switches, emergency stop switches, and security window switches Wait. Mechanical safety devices include brakes, speed limiters, safety gear, bumpers, door hook locks, and door safety pads. These safety devices ensure the safe operation of the elevator. Facing the relevant knowledge of the elevator, a question-and-answer approach was introduced.

1.How does the elevator work?

The elevator has a car and a counterweight, which are connected by wire ropes. The wire ropes are driven by the traction of the driving device (traction machine) so that the elevator car and the counterweight move up and down on the inner guide rails of the elevator.

2. Will the rope of the elevator break?

For elevators used for wire rope elevators, the country has special regulations and requirements. The configuration of the wire rope is not only to bear the elevator car and the rated load, but also to consider the size of the traction force. Therefore, the tensile strength of the steel wire rope is greatly greater than the load capacity of the elevator, and their safety factors are all above 12. The general elevators are With more than four wire ropes, one elevator wire rope will not break.

3. Is there any danger of sudden power failure during elevator operation?

If an unexpected power outage or failure of the power supply line occurs during the operation of the elevator, the elevator will automatically stop running and there will be no danger. Because the elevator itself is equipped with electrical and mechanical safety devices, once the power is cut off, the actuator of the electric body will automatically brake so that the elevator cannot operate. In addition, if there is a planned power outage by the power supply department, the elevator or the elevator will be stopped in advance if it is notified in advance.

4. What to do if the elevator runs suddenly?

The running speed of the elevator, whether up or down, shall be operated within the specified rated speed range. Generally, it will not overspeed. If there is overspeed, there is an anti-overspeed device in the elevator control system. At this time, the device will automatically operate. Decelerate or stop the elevator.

5 .Does the elevator car overload automatically control?

The load capacity of the elevator varies according to the requirements. The elevator can only be operated within the specified load. If the elevator exceeds the limit, the elevator will automatically alarm and cannot operate.

6 .When the elevator is closed, will it cause harm to people?

In the process of closing the elevator, if the hall car door meets people or things, the door will automatically restart and will not hurt anyone. Because the door is provided with a switch for the protection of the family, once the door touches people or things, this switch action prevents the elevator from closing and reopening, and then closes the door again. In addition, the closing force is set by the degree that will not be achieved.

7. Can elevator doors be opened?

The hall door of the elevator cannot be opened outside the court and must be opened with special tools (the maintenance tools are used to hold the tools). When passengers are not allowed to knock on the door, they cannot open it. Otherwise, there is a danger of falling into the well.

8 .How to call an elevator?

When you need to take a lift, you should select the direction button you want to go in the elevator panel. Press the up button up and the down button down. The elevator adopts the forward parking method in the control system. If the elevator is in the reverse direction, the elevator will not stop at this level.

9. Are there any protective measures for lift bottoms and tops?

The bottom of the elevator lifts the car of the elevator in the event of a failure of the control system. It will drive down beyond the first leveling floor until it stops at the buffer of the pit. The buffer is a protection device provided for this purpose. This protection device is composed of spring type and hydraulic type, depending on the speed of the elevator. When the car is lying on the buffer, it is called the bottom. At this moment, the buffer will relieve the impact force of the elevator car and will not cause serious injury to the passengers in the elevator.

10. What should I do in the car when the elevator is not operating properly?

When taking the elevator and found that the elevator has overspeed or the speed of the ladder is slow, the red emergency stop button on the control panel should be pressed. The elevator will stop automatically and inform the elevator maintenance personnel in time.

11. What should I do if I find something smelly in the elevator car?

When it is found that there is abnormal smell in the elevator car, the red emergency stop button on the control panel should be pressed to stop the elevator and timely notify the elevator maintenance personnel.

12. What should I do if I find that the elevator has abnormal vibration and scraping?

When you are in the elevator and you find that the elevator is experiencing abnormal vibration, vibration, or scratching, you should press the red emergency stop button on the control panel to stop the elevator and inform elevator maintenance personnel in time.

13. What should you watch out for when an elevator suddenly loses power or fails and gets stuck in the car?

When you are locked in the car, you should follow the command of the elevator driver. Under the condition of the enlisted driver, you can contact the relevant person through the communication device to solve the problem. Do not use your voice or jump out on your own.

14 .What should I pay attention to when entering the car?

When you enter the car, if the elevator door is open, you should check whether the elevator is in the leveling position or whether the car is in the floor, especially when the optical fiber is not clear at night. Injury, and it should be as soon as possible.

15. Are elevator installation and repair units and maintenance and operation personnel qualified?

Yes. Elevator installation, maintenance, and renovation units should obtain the qualification certificate issued by the Beijing Municipal Bureau of Quality and Technical Supervision before they can engage in the corresponding work; elevator installation, maintenance, elevator operators should obtain the special personnel operation certificate, hold the card posts.

16. What emergency situation can the elevator call 110?

When the elevator has an emergency, there are wounded, trapped people (people trapped in the elevator car, can not find the elevator maintenance personnel) situation, can call 110 to call the police.

17 .What happens to an elevator when it comes to quality or safety complaints?

When the elevator often closes doors, clips, uneven floors, tops, bottoms, elevator drivers or maintenance personnel without employment permits, drivers often off the job, there is no inspection certificate in the car or the certificate expires, the elevator has abnormal noise or noise, abnormal Vibration or vibration, abnormal car smell in the car, elevator speed is too fast or too slow, maintenance is not timely, there is no communication or alarm device in the elevator car, etc., can make quality or safety complaints.

18 .What should I say when I report an elevator alarm or complaint?

The specific conditions of the elevator should be clearly stated, and the specific location of the elevator, the contact person and contact phone number of the property unit of the elevator and the responsible department, the maintenance unit of the elevator, and the telephone number should be clearly stated.

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