Why does the elevator have a safety tongs and fall?
The position of the speed limiter wire rope is not within the effective width of the rope clamp, so that the clamp rope can not clamp the steel wire rope of the speed limiter, and the failure is caused.
The newly installed elevator speed limiter, install the wrong direction, when the elevator moves downwards, overspeed rope clamp can not clamp overspeed rope, on the other hand, when the elevator to run when the rope clamping pliers to clamp the wire rope, causing failure.
But the elevator safety clamp, can not guarantee 100 per cent lift will not fall caused casualties, the premise is the elevator safety clamp must support the effective operation, the following may lead to accidents and lift safety clamp:1. The inside of the jaw of the safety tongs has foreign bodies such as sand, dust, sludge, etc. the safety tongs wedge block can not hold the track guide rail, and the car continues to slide downward, resulting in failure.2 because of the wear of the speed limiter wheel groove, the position of the speed limiter steel wire rope is decreased, and the rope clamp can not touch the wire rope or the brake power is insufficient, which causes the speed limiter rope to slide.3. The structure of the lifting mechanism of the safety clamp is not correct, the stroke of the lifting rod is not enough, the pulling is not in place, and the wedge block is not contacted with the rail working face, thereby causing ineffective action.
The elevator has a safety clamp, not a cause to prevent a fall, but a safety device that stops the car when it crashes and clamps it on the rails.
