エレベーター省エネ機器サプライヤーは、高層ビルが立ち並ぶ今日の都市において、エレベーターはオフィスや住宅地に欠かせないツールであることを改めて認識しています。しかし、エレベーターは正常かつ安全な運転を維持するために定期的なメンテナンスが必要です。
エレベーターのメンテナンスは、主に正常な運行を維持するためのものです。停電や火災などの緊急事態が発生した場合には、エレベーター非常装置が対応する必要があります。
Working principle of elevator emergency device
Power detection
When the external power grid is supplying power normally, the power detection circuit of the emergency device gives a normal signal for the AC input power supply. The battery pack of the device is automatically float charged through the charging circuit to maintain the rated working voltage. The charging circuit has protection functions such as overcharge discharge, overcurrent, and short circuit.
Emergency operation
When the elevator encounters a power outage and the elevator control system stops running, the DSP control system of the emergency device will immediately detect the elevator status and automatically activate emergency rescue. Firstly, K1A is engaged to cut off the power supply from the external power grid to the elevator control transformer and perform electrical interlocking. Next, check the safety, door locks, and maintenance circuits of the elevator, and supply power to the door area sensors to detect the leveling signal. If normal, start the current converter to supply power to the door control system (AC door machine, DC door machine, variable frequency door machine). The door opening motor MD obtains the required voltage and opens both the car door and the hall door simultaneously; If the elevator car is not in the level position, the normally open contact of the relay is closed, and the DC converter supplies power to the holding brake circuit. The holding brake is opened, and the voltage output from the three-phase inverter circuit is supplied to the traction machine through the normally open contact of K2A, pulling the elevator car in a certain direction. The elevator car stops at the level position. Stop outputting the three-phase inverter voltage and close the brake. After the car door and hall door are opened, the contacts of the emergency device's contactor and relay are all restored to the state before emergency operation.
Safe locking
If the DSP control system of the emergency device determines that the elevator has stopped running due to a fault in the safety circuit or door lock circuit, according to the requirements of the "Safety Regulations" for elevator operation, the device will not be put into emergency operation. Even after the emergency device is put into emergency operation, the signals of the elevator safety circuit and door lock circuit are always monitored. Once any protection signal is generated, the emergency operation will be immediately terminated to ensure the safety and reliability of passengers and elevator equipment. Similarly, the emergency device is constantly monitoring the maintenance circuit of the elevator control system. When maintenance personnel are inspecting the elevator, as long as the maintenance switch is pressed, the device will automatically lock and not be put into emergency operation.
Emergency end
緊急操作が完了すると、装置とエレベーター制御システムの各部との接続が切断され、独立した待機状態となり、エレベーターの通常運転に影響を与えません。三相交流電源が復旧すると、緊急装置の充電回路が自動的にバッテリーパックを充電します。
エレベーターに複数の「安全ベルト」を設置しましょう。多くの開発業者や不動産管理部門は、エレベーターへの安定した電力供給の問題に対する必要な投資と配慮を怠ってきました。電力不足により、主要都市部の一部路線では、依然として緊急時に一時的な電力制限が発生する可能性があります。さらに、様々な外的要因によって局所的な停電が発生する可能性もあります。エレベーターに非常用電源が備えられていれば、緊急停電時でもエレベーターの正常な運転を確保し、乗客の安全な移動を可能にします。