Weak current College】 【elevator accident analysis and prevention.

1. type of elevator accident

Elevator accident categories according to the location of the accident, the system can be divided into door system accident, accident or squatting bottom, other incidents. According to statistics, various accidents account for the elevator accident occurred hundreds of probability: door system accident accounted for 80 per cent, recoil or squatting bottom 15 percent of the incidents, the other accident accounted for 5 percent. Door system accident accounted for elevator accidents in the largest share, occur most frequently.

2. elevator accident and prevention measures

Use or maintenance personnel of defects and elevator security risk, there is an elevator accident prerequisites. Conditions, the elevator accident may occur, or may not occur; however, two conditions are met, the elevator accident must have occurred. If you know or have this principle, where conditions are not met, can effectively prevent elevator accidents.

(1) maintenance units or maintenance personnel of defects

Part of the maintenance unit or maintenance personnel did not perform "security primarily, preflight check prerequisites, planned maintenance" principle, but rather a piecemeal approach, not a systematic preventive maintenance, which is to be faulted stopped escalator before being urgently carried out wrong and misleading as well, some maintenance units or maintenance personnel, or even perfunctory, reset the elevator safety.

Management, or maintenance personnel, should strengthen the relevant legislation of learning, so there are law-breakers. The Department should strengthen enforcement, improve law construction.

(2) Elevator's own security risks and prevention measures

Door system accident rate maximum occurs is determined by the structural features of the lift system. Because every elevator operation process must undergo two-door action process, the closing action process twice, so that the door locks work frequently, aging rapidly, the passage of time, causing the door mechanical or electrical protection device actions are not reliable. If maintenance is not prompt, Elevator replacement with hidden running, very prone to accidents.

Recoil or squatting bottom accident is normally due to the elevator brake failure, brake is a very important part of Elevator, if brake failure or with the risks, you lift is out of control, no security, the consequences will be disastrous. To effectively prevent recoil accidents, in addition to strengthening the standards of perfection, it is necessary to strengthen the brake inspection, maintenance and repair.

Other accident such incidents mainly individual device fails or is not reliable.

3. in case of accident

(1) the door system accident 1

14 July 1999, Chaoyang District, Beijing No. 14 guangximen North South elevator door away at run time, causing the ladder three floors the second person in the household and grandchildren on elevator was cut, was killed and another injured. 24 September 1998, a Bank of elevators in Shandong province, also appeared with the door go ladder accident. That day, a passenger enters the car selected layer, standing in the doorway, etc. with the staircase. When the elevator open but to normal speed to run the passenger's head and jaw respectively by car along the top and ground Ridge formation of extrusion, causing serious injuries.

(2) door system accident 2

1995, 13 September, a garment factory in Shandong province, there was a fatal accident of malignant elevator. The elevator for passenger and freight elevators, 6 6 station, XPJ-rated speed 0.5m/s, rated load of 1000kg, door lock for the GS75-11 type. Because of the elevator manufacturing earlier, all parts of the model number ageing has become, since Delta collision check child lock blocks and frequent collisions, the triangle collision block has been ground into down arc, coupled with the spring aging, meshing depth only 3mm, as long as the door in the floor, hands a grilled layer door you can easily open. In response, the maintenance staff report to the unit leadership were three, the answer to enterprise benefits, financial stress, first with wait later. September 13, 5: 30 workshop work, due to high a workshop a team leader, a little late to go after work, about 5: 40 or so, come out from the workshop (workshop in four layers), found that the elevator were closing up, high around a left elevator 15m, we hurriedly ran past, when the elevator is started, is fast approaching on the sixth floor, the higher a hand opens the door to the forward-a step to step, fall into the pit, died on the spot. This is a typical managers and users do not pay attention to safety caused by accidents.

(3) recoil or squatting bottom accident

Beijing a room management a 24-storey MBDS elevator, due to maintenance work on the job when you forget to unplug gate opening wrenches, along with the elevator's tremor, wrench, plug in the tight, eventually causing the brake could not be closed. When the elevator to a layer, and repair workers is to withdraw from the inside of the car, only to find that the elevator is automatic, one elevator between hesitation move faster and faster. He laid the car top emergency stop switch, but to no avail, maintenance workers do. The elevator is out of control, speed straight 24 layers, the wail recoil, maintenance workers immediately body folds and cowered in the lowest car top. A loud bang, the items in the cabin; shook the entire building. Maintenance worker lives saved, but the car top floor complex around the wheel was shattered, room top bow a big drum kits.

(4) other accidents

A college new two elevators, Lee, senior people on elevator Hall door and cabin doors the distance between the blades. When they are adjusting bolts, press the call button, fast elevator, Li was squeezed into the car and 6 floor Hall door lateral wells road, after the death of the rescue is not valid.