Safety protection device for preventing elevator car from sliding

Abstract

The invention discloses a safety protection device for preventing an elevator car from sliding. The safety protection device comprises a car and a well pit, wherein a car buffer cover is arranged on the car bottom of the car; convex steps which extend outwards are formed at the bottom periphery of the car buffer cover; a partition wall is arranged on a position, which is correspondingly arranged between the car and counterweight, of the well pit; a convex table I which extends inwards is arranged at the front side of the well pit; and convex tables II which inwards extend are arranged at the left side and the right side of the well pit, so that the shape and the size of a section of a space formed by the partition wall, the convex table I and the convex table II are matched with those of the section of the convex step of the bottom of the car buffer cover. According to the safety protection device disclosed by the invention, the convex table and a partition table are arranged in the well pit of an elevator to define a space, wherein five surfaces of the space are sealed, and the upper end of the space is open; when the car quickly collapses to the bottom, the convex step of the car buffer cover and the whole five-surface sealed space define an air cylinder-piston system, so that air pressure is different according to different positions when the car collapses to the bottom, and therefore, the reduction effect is achieved, and passenger safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of elevator safety protection, in particular to a safety protection device for preventing an elevator car from slipping. Background technique [0002] Generally, ordinary passenger elevators are equipped with a speed limiter-safety gear linkage mechanism. When the elevator is out of control or overspeeding during operation, it can be automatically stopped to prevent the elevator car from slipping. In extreme cases, the car will squat to the bottom. At present, in the elevator market, the selection of safety gear in the elevator pit is mainly based on the weight and rated speed of the elevator system. It can only protect the safety of passengers when the elevator is squatting at the bottom of the rated running speed of 105%-110%. When the speed of the car squatting exceeds this speed Passenger safety cannot be fully guaranteed. Contents of the invention [0003] The object of the present invention is to pr...

AI Technical Summary

Problems solved by technology

At present, in the elevator market, the selection of safety gear in the elevator pit is mainly based on the weight and rated speed of the elevator system. It can only protect the safety of passe

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