Analysis of elevator slides, slip layers and falling layers

- Aug 28, 2018-

First, the concept of slides and slip layers

Elevator slide: The so-called "slide" and "slip layer" are self-protection after elevator failure. When the elevator is in normal operation, the control system will start the elevator to close the door. The acceleration and deceleration control when the stop is stopped is within the acceptable range of passengers' physiology. It does not cause discomfort, but if the control system detects a fault or abnormal signal, it will immediately issue an emergency stop command, and then the drive system will immediately slow down or stop the normal elevator. Because this kind of emergency deceleration or stop is carried out in an emergency state, the average passenger can not directly observe the relative position and speed of the elevator in the car, which causes the passengers in the car to feel abnormal speed changes and obvious discomfort. The illusion of "elevator slide" and "weight loss", coupled with the abnormality of the inner floor of the car after the failure, the passengers are convinced of the "falling down".

Second, the slides and slip layer will not cause damage to passengers.

 In the event of a fault or abnormal signal, the normally operating elevator will cancel the originally registered floor signal and replace it with a command such as deceleration, stop or automatic correction operation.

     The elevator will suddenly stop and stop, and the elevator control system will perform self-test. After the general fault is automatically eliminated, the elevator will run to the flat level of the nearby floor at a relatively slow speed or run to the base station (usually located on the first floor of the building). Position correction, just like a computer restart, then automatically open the door, release the passengers, and the elevator enters the standby state.

 If the fault abnormal signal can not be automatically eliminated, it will cause the passenger to be trapped in the elevator. At this time, there is no need to panic. The elevator braking system will firmly control the car and protect the passenger and the equipment itself. come down. The so-called "slide" phenomenon usually does not cause harm to passengers.

Third, the causes and preventive measures of slides and slip layers

1. The landing door or the car door is bumped or artificially smashed during use. There are plastic bags and other foreign objects hanging in the door lock in the hoistway, so that the car can hang the door lock during the operation, or the maintenance time door The clearance of the system-related components is not adjusted in place, causing the door electrical interlock to open during the elevator operation.

Suggestion: When riding the ladder, avoid collision or artificial tricks caused by the body or objects on the elevator door. Do not throw garbage debris into the hoistway from the gap between the car and the hall door sill, and prohibit bouncing and other behaviors in the car.

2. During the decoration period, the electrical contacts are poorly contacted due to debris and dust. If there is foreign matter in the slide of the ground, the door is jammed, the power supply is abnormal, etc., and the elevator can be stopped during operation.

Recommendation: Standardized management, user civilization rides.

3. The elevator button motherboard is damaged, causing the floor registration signal to conflict or interfere.