Safety Guardian of Passenger Elevators: Detailed Explanation of Multiple Protection Mechanisms

Overload Protection: A Smart Line of Defense to Prevent Weight Excess
Overload protection is an important part of the safety mechanism of passenger elevators. When the total weight of passengers or cargo in the passenger elevator exceeds the rated load of the elevator, the overload protection device will be activated immediately. This mechanism is usually implemented by a weighing sensor installed at the bottom of the elevator car, which can monitor the weight changes in the elevator in real time. Once an overload is detected, the elevator will sound an alarm and refuse to close the door or start running until the overloaded items are removed. This design effectively avoids unstable operation or failure of the elevator caused by overload, ensuring the safe operation of the elevator within the rated load range.

Overspeed Protection: The Guardian of Speed ​​Control
The overspeed protection mechanism is designed to prevent the elevator from losing speed control during operation. The elevator's control system monitors the elevator's operating speed in real time and compares it with the preset safety speed threshold. Once the elevator speed exceeds the safety threshold, the overspeed protection device will be activated immediately, quickly reducing the elevator speed through devices such as electromagnetic brakes or safety clamps, or even stopping it completely. This mechanism can effectively prevent the elevator from accidentally falling or colliding due to excessive speed, providing passengers with a solid speed safety barrier.

Door lock protection: a solid line of defense to protect the elevator door
The door lock protection mechanism is the key to ensuring that the elevator door is locked when closed. The design of the elevator door adopts a multiple door lock structure, including a main lock and a secondary lock. During the operation of the elevator, the door lock protection device will continuously monitor the locking state of the door lock. If the door lock fails to be completely locked or fails, the elevator will refuse to start or stop running immediately and sound an alarm. This design effectively prevents the elevator door from accidentally opening or closing due to door lock failure, ensuring the stability and safety of the elevator door during operation.

Emergency brake: an emergency measure for emergencies
The emergency brake mechanism is the last line of defense in the passenger elevator safety mechanism. When the elevator encounters a serious fault or abnormal situation, such as electrical system failure, control system disorder, etc., the emergency brake device will start immediately. This mechanism quickly cuts off the power source of the elevator by mechanical or electrical means, causing the elevator to stop running in a very short time. At the same time, the emergency brake device can also ensure that the elevator remains stable during the stop process, preventing passengers from being injured due to sudden stops. This design provides timely and effective protection for passengers when the elevator encounters emergencies.