Protection device for accidental movement of elevator car and control method

Abstract

The invention relates to the technical field of elevator control, in particular to a protection device for accidental movement of an elevator car and a control method.The device comprises a first brake, a second brake and a brake control module, and the first brake and the second brake are both connected with the brake control module. The brake control module is used for detecting a brake signal of the first brake, and when the brake signal of the first brake is inconsistent with a preset brake signal, the second brake is controlled to limit the action of a gearless traction machine. The first brake and the second brake are arranged on the gearless traction machine, a first brake signal of the first brake is obtained through the brake control module, and then the obtained first brake signal is compared with a preset brake signal in a preset brake control module; and then the second brake is controlled to limit the gearless traction machine to act according to the comparison result, so that the elevator stops operating, an elevator car is prevented from moving accidentally, and the safety of the elevator passengers is guaranteed.

Description

technical field [0001] The invention relates to the technical field of elevator control, in particular to a protection device and a control method for accidental movement of an elevator car. Background technique [0002] With the popularization of elevators in daily life, elevator accidents continue to occur, especially the accidental movement accidents of elevator doors that are more threatening, which have brought huge damage to the life safety of elevator personnel, such as accidents caused by shearing. have happened. The root cause of the accident was mainly caused by the unexpected movement of the elevator car. Therefore, finding a practical and reliable protection device that can reliably prevent the accidental movement of the elevator car is an urgent problem to be solved in the entire elevator industry. [0003] In the prior art, the used elevator car accidental movement protection device, such as figure 1 As shown, it is generally composed of three parts: the det...

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Problems solved by technology

[0003] In the prior art, the used elevator car accidental movement protection device, such as figure 1 As shown, it is generally composed of three parts: the detection subsystem, the braking subsystem and the self-monitoring subsystem; the braking subsystem is generally a redundant brake, that is, the gearless traction machine brake; the brake is set in the gearless traction On the mechanism machine, the movement control of the elevator car is achieved by using the brake action; and when the elevator car moves unexpectedly, due to the influence of the environment and equipment factors, the brake cannot reliably perform the braking action or maintain a certain braking action. dynamic moment, resulting in unexpected movement of the elevator car

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