How To Prevent Passenger Elevator Failure In Daily Life
1. Passenger elevator lift rope switch disconnection may cause the elevator to stop
Like the hoisting rope, the speed governor rope will also stretch during use. Due to the effect of the bottom pit rising rope weight, the rising rope wheel switch is offset until the switch is opened and the elevator is stopped.
This type of failure, for newly installed elevators, maintenance personnel must check once a month, after one year of operation, check once every three months, so that it can prevent problems before they happen. The author has encountered several phenomena that caused the three switches to move at the same time because the mouse fell into the pit and broke into the rope wheel. Due to the lack of strict sealing of the hall door and the wall hole in the hoistway, some rats will fall to the sluice when they break into the hoistway, and some will fall into the pit and get stuck in it because they try to escape the rifle. The elevator runs down. This leads to the safety clamp switch action, and some speed limiter switches are also linked together. There is also a mouse in the machine room into the speed limiter, causing the above failure. The basic solution to such failures is to prevent rats. Anti-rat measures such as appropriate rat drugs can be sprayed in the machine room and in the corner of the pit to reduce the occurrence of malfunctions.
2. The passenger elevator may be malfunctioned by the door interlocking failure.
According to the design requirements of the elevator: the elevator can only start running after each floor and car door of the elevator is closed (fast train). If any one of the hall doors or the car door does not close the elevator, it cannot run.
Due to the accumulation of dust at the door lock joints, the contact is poor, causing fires, resulting in the phenomenon of stopping the stairs. The time is good or bad, but the fault is not known.
Since the engagement depth of the lock hook and the door lock stopper is too small, the door lock contact is not completely pressed, resulting in poor contact. The national standard meshing depth is greater than 7mm. It is also seen from this point that as long as it is larger than 7mm, the contact pressure is increased to avoid contact failure.
Due to the excessive clearance between the lock hook and the stop, if the passenger knocks the door outside the hall door, the door disconnection switch will be disconnected and the passenger elevator will suddenly stop during operation. The passengers let go and the passenger elevator returned to normal.