The invention discloses a protection device for preventing accidental movement of a lift car. The protection device comprises a releveling action relay, a releveling state relay and an accidental movement protection relay. The releveling action relay is provided with a normally open first action contact and a normally open second action contact. The releveling state relay is provided with a normally closed first state contact. The accidental movement protection relay is provided with a normally open first protection contact and a normally closed second protection contact. A coil of the releveling action relay is connected with an RC delay circuit. The normally open second action contact and the normally closed first state contact which are connected in series form a first branch for controlling a coil of the accidental movement protection relay. The normally open first protection contact forms a second branch for controlling the coil of the accidental movement protection relay. The normally open first action contact is in parallel connection with the two ends of a landing door state switch and a car door state switch which are connected in series. The protection device can achievethe protection function of preventing accidental movement of the lift car according to standard requirements, the number of the used relays is small, and the cost is low.
本发明公开了一种防止轿厢意外移动的保护装置,其包括再平层动作继电器、再平层状态继电器及意外移动保护继电器;再平层动作继电器具有常开第一动作触点及常开第二动作触点;再平层状态继电器具有常闭第一状态触点;意外移动保护继电器具有常开第一保护触点及常闭第二保护触点;再平层动作继电器的线圈接有RC延时电路;串联的常开第二动作触点与常闭第一状态触点构成控制意外移动保护继电器的线圈的第一支路,常开第一保护触点构成控制意外移动保护继电器的线圈的第二支路;常开第一动作触点并联于串接的层门状态开关及轿门状态开关两端。本发明能实现标准要求的防止轿厢意外移动的保护功能,并且使用继电器数量较少,成本较低。
Protection device for preventing accidental movement of lift car
防止轿厢意外移动的保护装置
2020-12-11
Patent
Elektronische Ressource
Chinesisch
IPC: | B66B Aufzüge , ELEVATORS |
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