Compensation protection device for door lock during maintenance of elevator

Abstract

The invention discloses a compensation protection device for door lock during the maintenance of an elevator. The compensation protection device comprises a maintenance circuit which is sequentially provided with a maintenance control circuit and a maintenance relay; the maintenance circuit is externally connected with a power supply by a power input point and a power output point; a crossover compensating circuit which is connected with the maintenance control circuit in parallel is arranged between the power input point and the maintenance relay; the crossover compensating circuit is provided with an electronic control system. The compensation protection device is convenient and can improve the efficiency in the maintenance work; after the structure is reasonably reformed, the compensation protection device can safely and rapidly remove the fault during the maintenance of the elevator by the series connection of a single-pole double-throw switch and a compensation reset button, and the accident that a lift car goes up and down all the same under the condition that a door is opened due to misoperation can be avoided; the whole structure of the compensation protection device is easy in installation and maintenance, and the compensation protection device is beneficial for technical popularization and application.

Description

technical field [0001] The invention relates to the field of elevators, in particular to a protection device for elevator maintenance door lock compensation. Background technique [0002] The electrical protection of the elevator door lock is mainly used to prevent the occurrence of shearing accidents in the door area. At present, two methods are generally used. The first method is to provide the door interlock protection function, that is, to make all the door lock contacts into a series circuit, and when any one of the contacts fails, the entire door interlock circuit will fail, and the elevator cannot move at this time. However, there must be a prerequisite for the door interlock to function normally, that is, no abnormal short circuit can occur in any part of the door interlock. Once the door interlock is short-circuited, for example, the short-circuited door lock wire is not removed in a hurry after the elevator is completed, even if the door is opened, the car can sti...

AI Technical Summary

Problems solved by technology

[0003] Due to the difficulty in maintenance due to the unreasonable door lock during the maintenance of the elevator, it brings trouble to the maintenance of the elevator and reduces the efficiency of maintenance

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