Fall prevention device designed by virtue of electromagnetic induction and current action, for elevator

Abstract

The invention discloses a fall prevention device designed by virtue of electromagnetic induction and current action, for an elevator. An elevator car is dragged to run along a guide rail through a motor in an elevator shaft; the elevator car is an aluminum car or a steel car; a plurality of groups of first electromagnetic coils and a plurality of speed sensors are vertically and uniformly arrangedat the two sides of the elevator shaft at intervals; the first electromagnetic coils are connected with a control relay, the speed sensors and a power supply through circuits, and the control relay is in a normally-open state; when the descending speed of the elevator car is greater than a set speed, the speed sensors enable the plurality of groups of first electromagnetic coils to generate a magnetic field through the normally-closed state of the control relay; at this moment, the elevator car moves in the magnetic field, the elevator car generates an induced current, the descending speed ofthe elevator car is continuously reduced through the action of an Ampere force, so that the elevator car slowly descends; and a plurality of groups of second electromagnetic coils and a plurality ofgroups of spring devices are correspondingly arranged at the bottom of the elevator shaft in a matching manner, and the effect of triple protection is acted on the descending of the elevator car.

Description

technical field [0001] The invention relates to the safe operation of an elevator, in particular to an elevator anti-falling device designed by utilizing electromagnetic induction and current action. Background technique [0002] With the rapid development of cities, elevators have become an essential tool for high-rise building traffic. It brings convenience to our lives and brings elevator safety accidents. [0003] Therefore, there are various devices to prevent elevator accidents from falling into wells, among which typical devices are: [0004] 1. The gear cone-drum progressive anti-fall safety device consists of the main devices of the gear-cone-drum progressive anti-fall safety device: gears, centrifugal speed limiting device and cone-drum brake. [0005] Its working principle is: when the downward running speed of the protection target (construction elevator cage) reaches the calibrated action speed, the throwing block of the centrifugal speed limiting device will b...

AI Technical Summary

Problems solved by technology

[0010] For the above products, there are common problems that the safety cannot reach 100%, it is difficult to overhaul, and the elevator cannot stop on the first floor after deceleration and stop, and the cost of refitting the old elevator is also high.

Images