Lift fall retarding device

Abstract

The invention relates to a lift fall retarding device comprising a lift shaft and a lift car located in the lift shaft. A fall retarding device is installed at the bottom of the lift shaft and comprises a starting device, a coil and a power supply cabinet. The coil is located below the horizontal plane of the bottom of the lift car which is normally used and is spirally arranged in the vertical direction, and the coil is installed around the bottom in the lift shaft. The coil is connected with the power supply cabinet through a starting device. The power supply cabinet supplies a power sourcefor the coil. When the lift is normally used, the whole fall retarding device is in the standby state. When the lift car falls, the lift car triggers the starting device, magnetic induction lines aregenerated when the lift car cuts the coil under the action of gravity, and then the lift car is slowed down. The lift fall retarding device has the advantages of being long in retarding distance, highin reliability, less in side effect, low in installation cost and convenient to detect and maintain and achieving stable slow descent.

Description

technical field [0001] The invention belongs to the technical field of elevator anti-falling devices, and in particular relates to an elevator falling-down slowing device suitable for traction elevators. Background technique [0002] Aiming at the problem that the elevator car falls due to a fault, the current existing solution is mainly to design a certain mechanical structure so that the car and the elevator track are stuck, or there is a large friction with the elevator track, so that the elevator car The car stops falling or slows down. Although this kind of measure can protect the elevator occupants to a certain extent, due to the complexity of the mechanical structure itself and the long service life of the elevator, its reliability is greatly reduced. A device most similar to the present invention is to set permanent magnets inside the elevator shaft to decelerate the elevator car during the falling process. However, the inner space of the elevator shaft is relativel...

AI Technical Summary

Problems solved by technology

Although this kind of measure can protect the elevator occupants to a certain extent, due to the complexity of the mechanical structure itself and the long service life of the elevator, its reliability is greatly reduced

A device most similar to the present invention is to set permanent magnets inside the elevator shaft to decelerate the elevator car during the falling process. However, the inner space of the elevator shaft is relatively large, and permanent magnets are used to completely cover the larger space. The strong magnetic field is difficult, and during the normal use of the elevator, the strong magnetic field in the elevator shaft will have a great impact on the electronic equipment carried by the passengers

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