Control system and control method for preventing elevator car from accidentally moving

Abstract

The invention provides a control system for preventing an elevator car from accidentally moving. The control system comprises a door area signal collecting unit, an elevator car shaft position positioning unit, an elevator control center, a current disjunction unit and an elevator braking unit. The signal output end of the door area signal collecting unit and the signal output end of the elevator car shaft position positioning unit are connected with the signal input end of the elevator control center. The elevator control center output signals to the current disjunction unit to control the elevator braking unit. When the elevator car is not located at the door area position and the elevator car accidentally moves under the door opening state, the elevator car can be effectively stopped, and major safety accidents are avoided. Meanwhile, an existing elevator system does not need to be greatly modified, and elevators in the using process or elevators in the producing process can be conveniently refitted.

Description

technical field [0001] The invention relates to the technical field of elevator control, in particular to a control system and a control method for preventing accidental movement of an elevator car. Background technique [0002] According to the national GB-7588-2003 "Safety Code for Elevator Manufacturing and Installation", the conditions for allowing elevator re-leveling are stipulated: "After the elevator stops, it is allowed to perform an action to correct the car stop position during loading or unloading. Make the car move continuously (automatically or inching)." That is to say, when the elevator stops at the leveling position and opens the door, the load of the car changes due to loading and unloading factors, which in turn leads to the expansion and contraction of the wire rope, and the car may not be at the leveling position. , at this time, the car is allowed to run at the jog speed within the scope of the door area when the car opens the door. In addition, the ca...

AI Technical Summary

Problems solved by technology

At present, when the car is in the non-door area, the hall door or car door of the elevator is in the open state, due to the malfunction of the control center, the contact adhesion of the brake circuit, the failure of a single component of the drive system that the elevator depends on for safe operation, etc. Accidents caused by the movement of the car occur from time to time, which brings great hidden dangers to the safe operation of the elevator

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