Safety protection device for elevator

Abstract

The invention discloses a safety protection device for an elevator. The safety protection device comprises the elevator, a work steel wire rope and a safety steel wire rope, wherein a fixed seat is arranged on one side of the elevator; a conical cavity is arranged on the middle part of the fixed seat; rope pressing steel balls and a conical spiral pressure spring are arranged in the conical cavity sequentially from top to bottom; the rope pressing steel balls are arranged on a guide pillar and pass through a wall of the guide pillar; and the guide pillar penetrates through the fixed seat. When the work steel wire rope is broken, a compacted swing arm loosens, the rope pressing steel balls press inwards and lock the safety steel wire rope in the guide pillar under the driving of the conical spiral pressure spring and guiding action of the conical cavity, the rope pressing steel balls is short in compaction stroke and quick in brake response; and since a conical cavity structure is adopted in the fixed seat and the rope pressing steel balls increase pressing force in the conical cavity with the falling of the fixed seat, a self-locking function of the rope pressing steel balls is realized, a brake effect is better and then the safety of the elevator is guaranteed.

Description

technical field [0001] The invention relates to a hoisting mechanism, in particular to a safety protection device for a hoist. Background technique [0002] As we all know, the main function of the hoist is to send materials or equipment from a low place to a high place or from a high place to a low place. It has the advantages of simple structure, convenient installation, removal and use. However, in construction and operation, major accidents are often caused by the breaking of the traction steel rope of the hoist. Therefore, when designing the hoist, safety protection devices will be installed to prevent the occurrence of falling accidents. At present, the common hoist protection device mostly adopts the wedge type broken rope protection device. Its main structure includes a movable wedge and a fixed wedge, and the two can slide relatively along the inclined plane. Tighten one side of the movable wedge, so that the other side of the movable wedge is lifted up and pressed...

AI Technical Summary

Problems solved by technology

However, the structure of this protection device is too complicated, and it takes a lot of force to press the movable wedge, which cannot be achieved instantaneously, and the relative sliding between the two wedges is prone to corrosion, thereby reducing the action sensitivity of the protection device and the falling braking distance. Easy to exceed the range stipulated by the state

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