Elevator car accidental movement protection device and control method

Abstract

An elevator car accidental movement protection device comprises an elevator car motion detection unit, an elevator car accidental movement detection unit, a control unit, a braking device and a self-locking device. The control unit is connected with the elevator car motion detection unit, the elevator car accidental movement detection unit, the braking device and the self-locking device. The elevator car motion detection unit is used for detecting the motion state of an elevator car. The elevator car accidental movement detection unit is used for detecting whether the elevator car moves accidentally or not. The braking device is used for braking the elevator car when the elevator car moves accidentally in an elevator stopping and door opening state after entering a door area or in a door closing state after receiving an operation instruction at the door area. The self-locking device is used for conducting self-locking on the braking device when the elevator car is in a high-speed running state, or in the state of being standby at the door area after an elevator door is opened, or in the state of leaving the door area. By adopting the elevator car accidental movement protection device, the probability of occurrence of false operations of the braking device is reduced, and the safety and reliability of products are improved.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to an elevator car accidental movement protection device and control method. Background technique [0002] Article 3.18 of GB7588-2003 "Safety Code for Manufacture and Installation of Elevators" National Standard No. 1 Amendment defines unintended car movement as: in the unlocked area and with the door open, the car leaves the landing without instructions Movement, excluding movement caused by loading and unloading operations. That is to say, the requirement for the car accidental movement protection device is to protect the car from accidental movement when it is in the unlocked area. UCMP (Unintended Car Movement Protection system), that is, the accidental car movement protection device, is installed on the elevator and is mainly used to stop the accidental movement of the elevator car leaving the landing in the unlocked area and with the door open. If the elevator car moves u...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in the normal working state of the elevator, when the elevator car is in any action state, the execution unit (ie, the braking device) is in the normal working standby state (ie, the power-on state), although the existing elevator car accidental movement protection The device can achieve safety protection under normal conditions, but there are still the following disadvantages: 1. Due to the long-term power supply of the execution unit, the life of the electrical components contained in the execution unit is reduced, and the failure of the internal electrical components of the execution unit is prone to occur, causing the execution unit to malfunction. Action risk, and the electrical components of the execution unit are powered on for a long time, which increases energy consumption and low energy efficiency

2. The execution unit is powered by a backup power supply. If the elevator is powered off for a long time or the backup power supply is insufficient for other reasons, the execution unit will act directly after power failure, which will also cause the risk of malfunction of the execution unit.

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