China Bed Elevator Supplier shares failure analysis of household 6-story elevator safety gear

1. There are sand, dust, oil sludge and other foreign objects in the jaws of the safety tongs. The wedge block of the safety tongs cannot catch the rail guide rail, and the car continues to slide down, causing failure. Treatment method: remove safety pliers to clean up foreign objects in the jaws.

2. Due to the abrasion of the wheel groove of the speed limiter, the position of the speed limit wire rope drops, the rope clamp cannot reach the steel rope or the braking force is not enough, causing the speed limiter steel rope to slip. Treatment method: Adjust the position of the speed limiter rope clamp and steel rope.

3. The size of the lifting mechanism of the safety gear is incorrect, the stroke of the lifting rod is not enough, and the lifting is not in place, so that the wedge block does not contact the track working surface, causing invalid motion. Treatment method: The structure of the lifting mechanism of different types of elevator safety gear is also different, but most of them are crank and rocker mechanisms. The effective stroke of the lifting rod can be changed by changing the structural size of the connecting rod mechanism.

4. The position of the wire rope of the speed limiter is not within the effective width of the rope clamp, so that the rope clamp cannot reach the wire rope of the speed limiter, causing failure. Treatment method: If the relative position of the wheel groove of the speed limiter and the rope clamp is not correct, the relative position can be adjusted. If the installation position of the speed limiter is incorrect, the relative position of the steel wire rope and the rope clamp is incorrect, and the position of the speed limiter can be adjusted. If the position of the wire rope is incorrect, the position of the wire rope can be adjusted.

5. The speed limiter clamp rope clamp has insufficient braking force and cannot clamp the speed limiter steel rope. When the speed limiter moves, the speed limiter steel rope slips in the speed limiter wheel groove and cannot lift the safety gear, causing failure. "Safety Code for Elevator Manufacturing and Installation" stipulates that the tension of the speed limiter rope shall not be less than the greater of the following two values ​​when the speed limiter is in operation: 200N or twice the force required for the safety gear device to function. The tension here should be understood as: when the speed limiter acts, the maximum braking force given to the speed limiter rope by the speed limiter through the friction of the wheel groove or the rope clamping device, that is, the speed limiter rope is not in the speed limiter The minimum tension for skidding. This force is too small to lift the safety gear mechanism, but this force cannot be too large to prevent the wire rope from being pulled beyond its tensile strength. Treatment method: properly adjust the tension of the speed limiter rope.

6. For newly installed elevators, the speed limiter is installed in the wrong direction. When the elevator runs down, the speed limiter clamp cannot clamp the speed limiter steel rope. On the contrary, when the elevator runs upward, the clamp stops. Clamp the wire rope and cause failure. Treatment method: readjust the direction of the speed limiter.

The above Escalator Supplier is organized and shared, hoping to help those in need.