Elevator safety knowledge knowledge quiz

Vertical transportation means indispensable in elevator-type high-rise buildings, it is a large-scale comprehensive equipment of electromechanical integration. In order to ensure its safety and reliability, the elevator has set up preventive measures from various aspects, such as electrical safety devices and mechanical safety devices. Among them, electrical safety devices are: power control protection device, power supply phase sequence protection device, door lock electrical interlock device, emergency stop switch, overspeed protection switch, overload protection switch, limit switch, emergency stop switch, safety window switch Wait. Mechanical safety devices include brakes, speed limiters, safety gears, buffers, door hook locks, door safety contact plates, etc. These safety devices can guarantee the safe operation of the elevator. Facing the relevant knowledge of the elevator, we will introduce it in the form of question and answer.

1. How does the elevator work?

The elevator has a car and a counterweight, which are connected by a wire rope. The wire rope is driven by the driving device (traction machine) to make the elevator car and the counterweight move up and down on the inner guide rail of the elevator.

2. Will the elevator wire rope break?

Wire rope elevators for elevators are special, and the country has special regulations and requirements. The configuration of the steel wire rope is not only to bear the elevator car and rated load, but also considers the size of the traction force. Therefore, the tensile strength of the steel wire rope is much greater than the load of the elevator. Equipped with more than four wire ropes, the elevator wire rope will not be broken once.

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

If there is a sudden power failure or failure of the power supply line during elevator operation, the elevator will automatically stop running without any danger. Because the elevator itself is equipped with electrical and mechanical safety devices, once the power fails, the actuator of the electric body will automatically brake, making the elevator unable to run. In addition, if the power supply department has a planned power outage, it will be notified in advance, and the elevator may be stopped in advance. ,

4. What should I do if the elevator operation suddenly accelerates?

Whether the elevator's running speed is up or down, it should run within the specified rated speed range. Generally, it will not overspeed. If an overspeed occurs, 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. Can the elevator car overload be controlled automatically?

The load capacity of the elevator is different according to needs. The elevator can only run within the specified load capacity. When it exceeds, the elevator will automatically alarm and cannot run.

6. Will the clamps cause harm to people when the elevator is closed?

When the elevator door is closed, if the hall car door touches people or objects, the door will automatically reopen and will not hurt people. Because there is a switch for preventing family members on the door, once the door touches a person or an object, the action of this switch prevents the elevator from closing the door, reopens it, and then closes the door again. In addition, the door-closing force is regulated and will not reach a level.

7. Can the elevator door be opened?

The elevator hall door cannot be opened outside the court, and must be opened with special tools (the installation tools are controlled by maintenance personnel). Passengers are not allowed to pick the door, nor can they open it, otherwise there is a danger of falling into the well.

8. How to call the elevator?

When you need to take a lift, you should select the direction button you want to go on the account panel in the elevator hall. Press the up arrow button up and the down button. The elevator adopts the way of stopping in the control system. If the elevator is in the reverse direction, the elevator will not stop at this floor.

9. Are there any protective measures for elevator squat bottom and punching?

When the elevator squats to the bottom, the elevator car will go down through the leveling position of the first floor when the control system fails, until it stops on the buffer of the squat. The buffer is the protective device provided for this purpose. The protective device is divided into two types, spring type and hydraulic type, according to the different running speed of the elevator. When the sedan squats on the bumper, it is called squat bottom. At this time, the buffer has a mitigating effect on the impact force of the elevator car, so as not to cause serious injuries to the passengers in the elevator.

10. What should I do if the elevator does not operate normally?

When riding the elevator, if you find that the elevator is overspeeding or the elevator speed is slow, you should press the red emergency stop button on the control panel, the elevator will automatically stop and notify the elevator maintenance personnel in time.

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

When an abnormal burnt smell is found in the elevator car, the red emergency stop button on the control panel should be pressed to stop the elevator and notify the elevator maintenance personnel in time.

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

When you are riding the elevator and find that the elevator is abnormally vibrating, shaking or scratching, you should press the red emergency stop button on the control panel to stop the elevator and notify the elevator maintenance personnel in time.

13. What should I pay attention to when the elevator suddenly loses power or malfunctions and is trapped in the car?

When you are locked in the car, you should obey the command of the elevator driver. In the case of enlisted drivers, you can contact the relevant personnel through the communication device to solve the problem. Never slam the door or jump out on your own, as it is dangerous.

14. What should be paid attention to when entering the car?

When you enter the car, if the elevator door is open, you need to see whether the elevator is in the leveling position, or whether the car is on this floor, especially when the fiber is not clear at night, you should pay more attention, otherwise it may cause Hurt and should be out as soon as possible.

15. Should elevator installation and repair units and maintenance and operation personnel obtain corresponding qualifications?

Yes. Elevator installation, repair, maintenance, and transformation units should obtain qualification certificates issued by the Beijing Municipal Bureau of Quality and Technical Supervision before engaging in corresponding work. Elevator installation, repair, maintenance, and elevator operators should obtain special personnel operation certificates and hold the certificates.

16. What emergency situation can the elevator call 110?

When there is an emergency in the elevator, there are injuries or trapped people (the personnel are trapped in the elevator car, and the elevator maintenance personnel cannot be found), they can dial 110 to call the police.

17. Under what circumstances can elevators make quality or safety complaints?

When elevators often close doors, pinch people, uneven floors, tops, squats, elevator drivers or maintenance personnel do not have a job permit, drivers often leave the job, there is no inspection certificate or certificate expired in the car, the elevator has abnormal noise or sound, abnormal Vibration or jitter, abnormal burnt smell in the car, the elevator speed is too fast or too slow, maintenance is not timely, and there is no communication or alarm device in the elevator car, etc., can complain about quality or safety.

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

The specific situation of the elevator should be explained, and the specific location of the elevator, the contact person and contact number of the elevator's property rights unit and the responsible department, and the elevator maintenance unit and contact number should be explained.