Detection method for preventing elevator car from moving accidentally

Abstract

The invention discloses a detection method for preventing an elevator car from moving accidentally. In the process of using the method, two flat floor sensors and a flat floor magnetism separation plate are mainly included, and an elevator control system receives feedback signals emitted by the flat floor sensors after the flat floor magnetism separation plate inserts into the flat floor sensors for judging the moving state of the elevator car and detecting accidental moving of the elevator car. By the aid of the method, other extra detection means or switches are not added in an original elevator system, so cost is saved. An elevator car stop device can be triggered only when abnormal moving of the elevator is detected through signal induction feedbacks of the flat floor sensors, and accordingly the method is favorable for guaranteeing the service life of elevator parts and reducing damages of the elevator parts.

Description

technical field [0001] The invention relates to the field of elevator traction, in particular to a detection method for preventing accidental movement of an elevator car. Background technique [0002] At present, the commonly used forms of elevators are traction type, that is, the elevator car is suspended by steel wire rope, and the car is moved by the friction force between the steel wire rope and the traction machine, similar to a pulley block. When the elevator car is in the door-opening area of ​​the floor, the traction machine stops rotating, and the brake on the traction machine is in a closed state, which is similar to the function of a car tire brake, locking the traction wheel on the traction machine with the wire rope wrapped around it, so that it will no longer Swivel, which is when the elevator car stands still for passengers to get on and off. When the elevator car needs to move, the motor of the traction machine starts to work, and at the same time, the brake...

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Problems solved by technology

[0006] The second and third reasons are the quality problems of the traction machine itself

In this public document, the unexpected movement of the car is not detected, but the car stop device (that is, the wire rope clamping protection device described in this patent) is activated every time the elevator stops and the door is opened, so that the traction is frequently affected. The steel wire rope is clamped, which can easily damage the elevator wire rope, which can reduce the service life of the elevator wire rope, or seriously damage or even break the elevator wire rope, resulting in safety accidents

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