Drum type elevator fall prevention device

Abstract

The invention discloses a drum-type elevator anti-fall device, which includes a control device and an anti-fall mechanism arranged on the top of the elevator car. The control device includes a weightless switch and an executive mechanism. mechanism to control; the present invention adopts the mechanical detection and control device mode, utilizes the weightlessness switch installed on the elevator car to open and close the weightlessness switch according to the weightlessness state produced by the overspeed descent of the elevator, and realizes the braking of the anti-falling device, preventing The detection speed of the falling device is accurate, and the detection of faults is reliable, which can significantly improve the working performance of the anti-falling device. It can be automatically executed and closed, with a high degree of automation and reliable elevator anti-falling performance.

Description

technical field [0001] The invention belongs to the technical field of safety in hoisting equipment such as elevators and elevators, and in particular relates to a reel-type elevator anti-falling device. Background technique [0002] With the continuous development of urban construction and the continuous increase of high-rise buildings, elevators are widely used in the national economy and life. As a means of transportation running vertically in high-rise buildings, elevators are inseparable from people's daily life. However, when the elevator is in operation, the phenomenon of elevator falling occurs occasionally, which seriously threatens the safety of people's lives and property, and causes irreparable losses. [0003] At present, the anti-falling device used by elevators is composed of a set of systems such as speed governor, steel cable, tensioning device, and counterweight. The steel cable moves up and down with the elevator around the speed governor runner installed...

AI Technical Summary

Problems solved by technology

However, when the elevator is running, the phenomenon of the elevator falling occasionally occurs, which seriously threatens the safety of people's lives and property, resulting in irreparable losses.

[0003] At present, the anti-falling device used by elevators is composed of a set of systems such as speed governor, steel cable, tensioning device, and counterweight. The steel cable moves up and down with the elevator around the speed governor runner installed in the machine room on the top floor of the building. The tensioning device realizes the anti-falling function, but the steel cable of the existing overspeed governor type elevator anti-falling device is too long, and the steel cable will be as long as the building has, which makes this device have three disadvantages, One is that when the elevator fails and falls, the long steel cable is easily interfered by other objects and malfunctions occur; the other is that the steel cable has greater elasticity, the longer the steel cable, the greater the stretch under the action of the tension The longer the braking time, the lower the safety of the elevator. In the case of an elevator falling in seconds, this is a shortcoming that cannot be ignored; third, the length of the steel cable is directly related to the cost of the elevator. Long steel cables inevitably lead to high cost

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