1 Security risks in elevator installation
One of the hidden dangers is that the protective device for the rotating parts of the elevator is not installed.
The second hidden danger is the insufficient brightness of the emergency lights installed in the elevator car.
The third hidden danger is the mismatch between the progress of the civil construction and the elevator installation progress. The slow progress of civil construction is mainly for newly installed elevators.
Once the elevator is trapped, passengers can get in touch with the outside world through the elevator's five-way calling system (ie, the management center host, elevator car extension, elevator room extension, elevator top machine room extension, elevator bottom machine room extension) to get rescue. However, in the acceptance inspection of newly installed elevators, the civil engineering department often fails to catch up because of the progress, and the construction of the duty room has not been completed when the elevator construction is completed and can operate normally. Therefore, the five-party intercom system may cause problems. In particular, newly installed elevators are installed in newly built residential quarters, and property management is often not in place. Once a residential community elevator is trapped in an accident, poor connection will affect the rescue, and this will easily lead to more adverse impacts.
2 safety factors in elevator operation
2.1 Accidents and Analysis of Elevator Door System
The structural characteristics of the elevator door system, such as each operation process has to go through the door twice, resulting in the accident rate of the elevator door system ranking first in all types of accidents in the elevator. Elevator door system accidents are generally divided into two types: shearing, collision accidents and falling well accidents. The door lock switch is short, the emergency button is shorted, the door lock circuit is shorted, and the door lock circuit fault is shorted, and other reasons may cause shearing and collision accidents; door damage, forced door closing, device failure, emergency unlocking device opening layer The door, the damage to the door lock, or the forceful opening of the door when the door lock engagement is too small, is the cause of the crash.
2.2 Well Accidents and Their Analysis
At the same time as the building level continues to increase, the shaft wall of elevators is also rising, which will add some threats to the occurrence of lift shaft accidents. The accidents in elevator shafts can be divided into three categories: elevator roofing, raft bottoming, and slide accidents. The occurrence of these three types of accidents is closely related. If the brake cannot stop the brake reliably when the elevator stops at the leveling floor, it may happen that the slide will occur; the slide will cause the bottom of the raft and the raft will not be triggered by the slide. The brake of the elevator is an important part of the safe operation of the elevator. The reliability of its working performance is directly related to the personal safety of the passenger.
3 Safety Hidden Factors in the Use of Elevators
3.1 Management defects
Most elevator users now think that everything has gone well after they have installed elevators. They do not fully understand the use of elevators and their management rules are not perfect. For example, some units use passenger elevators to transport goods that cause damage to elevators, such as sand, paint, and coal. This point is very obvious when the new residential area is concentrated on the renovation of the upper house, and construction workers are often barbaric when entering or leaving the elevator, which in particular leads to the damage of elevator doors is more common.
3.2 The use of passengers is not standardized
The elevator is a kind of special equipment. The use of correct specifications is very important. Due to the mixed urban population, many people simply do not know how to use the elevator properly. Some passengers use too much force when repeatedly pressing buttons or even pressing buttons; some passengers take children in elevators when they take the elevator; elevators are often overweight. These irregular use will cause great damage to the elevator, leading to some accidents.