Emergency braking system of elevator

Abstract

The invention discloses an emergency braking system of an elevator. The emergency braking system of the elevator comprises a speed limiter, a wire holder, safety tongs, a monitoring device and a control system, wherein the speed limiter is fixed to a shaft way wall on one side of an elevator car; the wire holder and the safety tongs are arranged on a car body of the elevator car; the speed limiter comprises a speed limiter wheel and a speed limiter wire; one side of the speed limiter wire is matched with the wire holder, and the other side of the speed limiter wire is connected with a linkage rod; the linkage rod is connected with the safety tongs through a linkage shaft; and the safety tongs are matched with elevator guide rails on the shaft way wall and used for clamping the guide rails. The emergency braking system of the elevator can achieve emergency braking when the elevator operates in an overspeed mode or moves accidently within the speed limit, the braking effect is good, no device is damaged, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of elevator braking, in particular to an elevator emergency braking system. Background technique [0002] In traditional elevator technology, there are three types of braking devices, namely: speed governor braking, rope clamp braking and brake braking. Overspeed governor braking means that the overspeed governor is used to monitor and control the overspeed of the car at any time. When the running speed of the car exceeds a certain value of the rated speed, the overspeed governor and the safety gear interlock to stop the car. Rope clamp braking is to directly apply the braking force to the traction wire rope, and stop the elevator car through the friction between the rope clamp and the wire rope. The brake given in the brake braking is the main part of the elevator, which undertakes basically all the braking actions of the elevator running. Therefore, in the prior art, a variety of monitoring is added to th...

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Problems solved by technology

[0003] In summary, in the actual work of the existing elevator braking device, the speed limiter brakes. When the car moves unexpectedly but the speed does not exceed a certain value of the rated speed, the speed limiter will not act to stop the car, so it is not applicable Brake when the car moves unexpectedly; brake with the rope clamp, the rope clamp directly acts on the traction rope, the action is completed instantaneously, the impact is strong, especially the movement often produces very serious jumping, after the action, the rope clamp block and the traction The lead wire rope is greatly damaged; the brake is braked and the brake is electrically controlled, but most of the brake faults are mechanical jamming, even if the power is cut off, the purpose of preventing the car from moving unexpectedly cannot be achieved

[0004] Therefore, the elevator braking device in the prior art has the disadvantages of poor braking effect and easy damage to the device.

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