Elevator safety device and control method thereof

Abstract

The invention discloses an elevator safety device and a control method thereof. An absolute value position detection sensor is responsible for detecting the absolute position of an elevator; a safety circuit switch is carried on an electronic board of an electronic safety controller, is connected in series in a safety circuit of the elevator, and can cut off the safety circuit during action; a safety tongs action detection switch is responsible for detecting whether a safety tongs part acts or not and transmitting a detection result signal to the electronic safety controller; and the electronic safety controller is responsible for receiving a signal of the absolute value position detection sensor, calculating and processing the signal and then sending a control signal to the safety circuit switch. The electronic safety controller is used for comparing the speed position at the SCS action moment with the elevator speed and position before the specified time to judge whether safety tongs are operated by mistake, so as to judge whether to output an SCS on instruction to the safety circuit switch to cut off the safety circuit. The situations that the safety circuit is cut off and people are trapped in an elevator due to misoperation of the safety tongs can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to an elevator safety device and a control method thereof. Background technique [0002] In the elevator safety braking system, if the elevator brake fails or the wire rope breaks and other extreme conditions cause the elevator to overspeed and fall, the safety gear is the last barrier to ensure the safety of the elevator. System design is very important. In terms of electrical design of the safety gear, generally, a push-type switch is provided in the linkage mechanism of the safety gear. , the switch is connected in series in the elevator safety circuit. When the switch is triggered, the elevator safety circuit is disconnected, thereby cutting off the power output of the elevator inverter to prevent the elevator from running again in an unsafe state. [0003] When the safety gear malfunctions, it will trigger the safety gear action switch, cut off the safety circuit of the ele...

AI Technical Summary

Problems solved by technology

[0003] When the safety gear malfunctions, it will trigger the action switch of the safety gear, cut off the safety circuit of the elevator, and the output of the elevator inverter will be cut off, which may cause the elevator to trap people

In particular, in an elevator equipped with an electric safety gear that needs a backup battery, after the battery is exhausted during a power failure, the electric safety gear will inevitably trigger the action detection switch of the safety gear; Trigger the action switch of the safety gear, which will leave a certain margin, which needs to be adjusted during installation, making the configuration of the electrical and mechanical systems more difficult

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