8 safety devices on the elevator

　　Although the hoist may seem simple in structure, there are eight safety devices in terms of safety. Here is a detailed introduction for you:

　　(1) Safe stopping device: a device that can securely support the hoist on the frame when it is parked on a certain level. Prevent the basket from falling due to sudden fracture of steel wire rope or failure of winch holding brake.

　　(2) Broken rope protection device: When the rated load capacity of the hoist is loaded and the rope is broken during suspension or operation, the broken rope protection device must reliably brake the hoist on the guide rail, and the maximum braking sliding distance should not exceed 1m, and should not cause permanent damage to structural components.

　　(3) Load capacity limiting device: When the load inside the hoist reaches 90% of the rated load capacity, an alarm signal should be issued; When the load inside the hoist reaches 100% -110% of the rated load capacity, the working power supply of the hoist should be cut off.

　　(4) Upper limit limiter: It should be installed at the highest allowable working position of the hoist, and the distance from the highest position of the hoist to the lowest point of the ceiling beam should not be less than 3m. When the elevator reaches the specified height, the limiter acts to cut off the power supply.

　　(5) Lower limit limiter: The lower limit limiter should be able to operate before the hoist touches the buffer device. When the hoist descends to the lower limit, the limiter should automatically cut off the power supply to stop the hoist from descending.

　　(6) Elevator safety door: A safety door should be installed at the loading port of the elevator. Safety doors should use interlocking opening devices.

　　(7) Buffer: It should be installed in the bottom pit of the frame. When the hoist acts on the buffer at the rated load and specified speed, it should be able to withstand the corresponding impact force. The buffer can be in the form of springs or elastic entities.

　　(8) Communication signal device: The signal device is a sound device controlled by the driver, and its volume should be able to be clearly heard by personnel using elevators to load and unload materials on each floor.