Every theater is a public place with a large number of people, so safety should be considered in stage design. According to the relevant regulations of the country, in order to prevent accidents due to the smashing of the elevator or improper handling of the driver. The elevators should be equipped with the following necessary safety devices to make the elevator car stop rising or falling in time.
1. Brake. Brakes controlling partial start-up restraint of traction machinery for elevators
2. Limit switch. A device that restricts the car from being driven to a high or low position; such as a limit switch control.
3. Overtravel switch. When the car travels to a high or low position, the car will be responsible for rising or falling. For stage equipment, in order to prevent the car from rushing to the top or sinking to the bottom, an overtravel switch that can cut off the power supply and cannot be automatically reset should be removed, and installed in the machine room instead of in the hoistway; it should be installed to absorb the energy of the moving mechanism and reduce the impact buffer.
4. Buffer. In order to increase the energy of the car rushing to the top or sinking to the bottom. Remove the rubber or sponge at the contact between the buffer and the car to increase its impact energy; the slipping of the rope groove will cause the car to fall suddenly
5. Safety pliers. In order to prevent the wire rope from breaking due to hoisting. The safety clamp that can simultaneously cut off the control power supply and stop the car from falling should be removed from the car. A car without a safety tong cannot take or carry people. If it is a simple elevator, there should be a safety device (safety stop pin, etc.) that prevents the car from suddenly falling when people are loading and unloading goods in the car; all elevators with more than three floors (including three floors) take people or take people.
6. Speed limiter. In order to prevent the driving speed from exceeding the normal speed. A speed controller should be installed (it may not be installed below the second floor (including the second floor)). This kind of mechanism is integrated with the safety clamp; the entrance and exit of the passenger compartment should be equipped with safety doors. Lifts used in public places, family dormitories and places with flammable and explosive materials.
7. Stage equipment safety door. In order to prevent people’s heads, hands, and feet from sticking out of the shaft and objects falling into the vertical shaft. The vertical door should be closed, the car should be full of doors, and the shaft (hall door) should not be less than 1.8 meters high; the door switch should be removed from the vertical door and the passenger compartment door.
8. Door switch. In order to prevent accidents due to the shaft door, passenger compartment door and car roof door not being closed. ; Door interlocks should be installed on the shaft door and the door of the passenger compartment (more than two doors).
9. Safety grounding device. In order to prevent damage to electrical equipment. The metal casing of the electrical equipment and the metal structure of the elevator should be equipped with a safety grounding device. The grounding wire uses multiple wires. Do not use the neutral wire as a safety grounding wire. The grounding resistance is not greater than 4 ohms; the elevator control can be cut off. power supply.
10. Speed limit wire rope switch. When the speed-limiting wire rope trips or breaks. disable the lift.
Post time: Sep-11-2023