Progressive safety gear

Safety clamp is an elevator safety protection device

Elevator safety gear is in the manipulation of the speed limiter, when the speed exceeds the speed limit of the elevator elevator speed limiter set, or the occurrence of fracture and relaxation in the case of suspension rope, a safety device will car emergency stop and clamped on the guide rail. It provides effective protection for the safe operation of the elevator. It is generally installed in the car frame or on the heavy frame. Safety pliers are divided into one-way and two-way safety clamp, but due to the complexity of the manufacturing process, two-way safety clamp has not yet been popularized in the country.

A progressive device that makes the car more than 1 m / S

Instantaneous safety clamp with buffering effect, making the speed not more than 1 m / S

Instantaneous safety clamp, making speed greater than 0.63 M / sec

Failure analysis of elevator safety clamp:

1, safety with forceps jaw sand, dust, sludge and other foreign body safety gear wedge clamp for track, the car continued to slide down, resulting in failure.

Processing method: remove the safety clamp jaw cleaning bodies.

2, the wear wheel groove of overspeed governor rope, the rope clamp down position, without access to enough rope or braking force caused by overspeed rope slipping. Processing method: adjust the speed governor rope and wire rope clamp position.

3, safety pliers pulling mechanism structure size is not correct, the lifting rod pulling stroke is not enough, not in place, the wedge contact to track working surface, caused by invalid action.

Methods: the pulling mechanism structure of elevator safety gear different is not the same, but the majority of the crank rocker mechanism, structure by changing the size of the connecting rod, to change the effective stroke of the lift rod.

4, governor rope rope clamp location in the effective width range, the rope clamp to governor rope, causing failure. Processing method: if it is the governor itself wheel slot and the clip rope clamp relative position is not correct, can adjust its relative position. If the governor installation position is not correct, resulting in wire rope and the relative position of the rope clamp is not correct, can adjust the speed governor position. If the position of the wire rope is not correct, the position of the wire rope can be adjusted.

5, overspeed rope clamp power is not enough, not overspeed rope clamp. When the speed limiter action when overspeed governor rope slipping in the wheel groove not safety gear failure. "Elevator manufacturing and installation safety norms" provisions: the speed limit device action, the speed governor rope tension should not be less than the following two values: 200N or safety clamp device to play the role of the required force of 2 times. The tension should be understood as: when the speed limiter action, speed limiter by friction wheel groove or rope clamping device for maximum braking force of overspeedgovernor rope, which is not in the least overspeed rope tension limiter in skidding. This force is too small, pulling the real safety clamp mechanism, but this is not too big, the tensile strength of steel wire rope will prevent more than break.

Processing method: appropriate to adjust the speed governor rope tension.

6, 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. Processing methods: to re adjust the direction of the governor.