Elevator safety device and control method thereof

Abstract

The invention discloses a safety device for an elevator and a control method thereof. The safety device for the elevator comprises a safety loop consisting of an emergency stop switch, a safety sensor and a safe operation contactor which are connected serially, as well as a detection loop. The detection signal end of the detection loop is connected with the emergency stop switch, and is used for detecting the recovery signal of the emergency stop switch; and the signal output end of the detection loop is connected with an elevator control system, and is used for starting a time delay program when an effective recovery signal of the emergency stop switch is detected. The elevator safety control method is applied to the elevator control system in the safety recovery process of the emergencystop switch; and when the elevator control system detects the recovery signal of the emergency stop switch and judges the recovery signal to be effective, the time delay program is automatically called, so as to allow the emergency stop switch to recover after a certain period of time delay. The elevator safety device can effectively avoid personal safety accidents from occurring because the functions of an on-site door lock device are shielded and do not recover yet when elevator maintenance personnel withdraw from a door area after elevator shaft operation.

Description

technical field [0001] The invention relates to an elevator safety device, in particular to a device for improving the personal safety of maintenance personnel when the elevator hall door lock is short-circuited and not removed, and a control method for the safety device. Background technique [0002] When the elevator needs to be repaired or maintained, the maintenance personnel usually restore the emergency stop switch (usually a manually controlled push-type switch, connected in series to the control circuit of the equipment after entering the elevator shaft and completing the work, which is used for quick stop in emergency situations) Stop the equipment to avoid abnormal operation. The detailed principle will be further described in the following embodiments) and exit the hoistway. When the hall door is closed, the elevator can respond to the call or automatically return to the base station and enter the rated speed operation under normal conditions. . [0003] However,...

AI Technical Summary

Problems solved by technology

[0003] However, due to various reasons, individual elevators may have an abnormal situation where the hall door lock switch is short-circuited and not removed. Before the maintenance personnel have completely exited the door area, the elevator suddenly enters the normal speed operation state, which is very prone to personal injury and death accidents.

Modern high-speed elevators are constantly developing and popularizing. As long as there are such hidden dangers, even experienced maintenance personnel will seriously threaten their lives.

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