A protection device and protection method for preventing accidental movement of a car

Abstract

The invention discloses a protection device for preventing a lift car from moving accidentally and a protection method thereof. The protection device comprises a controller and an actuator. The controller comprises a communication loop, an Input / output (IO) interface, a logic loop and a driving loop. The actuator comprises an actuation mechanism. The communication loop is connected with a lift control plate and the logic loop and used for acquiring lift running state information. The IO interface is connected with a speed detector to acquire the car speed information and the car running direction information and transmit the information to the logic loop. The logic loop is connected with the communication loop, the IO interface and the driving loop and used for judging whether the lift car is in the accidental moving state and transmitting a control signal to the driving loop after receiving the car speed information and the car running direction information. The driving loop is connected with the actuation mechanism of the actuator and used for outputting a driving signal to the actuation mechanism after receiving the control signal to enable the actuator to conduct corresponding operation on a lift guide rail.

Description

technical field [0001] The invention relates to the technical field of elevator control, in particular to a protection device and a protection method for preventing accidental movement of a car. Background technique [0002] As a special transportation equipment, the vertical operation elevator is closely related to the safety of passengers, and its comfort is more concerned by customers. With the continuous increase of the load of the elevator, the use of floors is getting higher and higher. When the passengers enter and exit the elevator car, the wire rope will elongate due to the load change and cause the car to move, which will cause the elevator car to shake and make the passengers feel uncomfortable or even Panic, and it will also cause the elevator to level after exceeding the leveling area, so that there is a possibility that the car will open the door and move. Although the national standard has made the protective measures to prevent the car from moving unexpected...

AI Technical Summary

Problems solved by technology

However, this technical solution has the following problems: 1) The device is an actuator that stops the elevator car when abnormal movement occurs, and does not describe how to determine that the elevator is in an unexpected moving state, and how to drive the control system; There are practical problems such as how to restore the device when the power is cut off; 3) The device uses the electromagnet to overcome the spring pressing force to open the brake block. After the electromagnet is powered off, the brake block will clamp the guide rail under the action of the spring force, This method is only suitable for emergency stop of the elevator; it cannot realize the stabilizing effect of the movement of the car due to the change of the length of the wire rope caused by the entry and exit of the elevator and the change of the load when the elevator stops normally.

In addition, there is a transient change in the magnetic flux of the electromagnet. When the power is turned on and off, the action time of the brake block is very short, which will cause vibration and noise when the guide rail is clamped, and it is not suitable for the car stabilization device under normal operation.

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