Safety considerations in stage lifting

Every theater is a public place with many people, so safety should be considered in stage design. According to the relevant provisions of the state, in order to prevent accidents due to lift crushing or improper control of the driver. All lifts should be fitted with the following safety fittings as necessary to stop the lift car rising or falling in time.

1. The brake. A brake that controls the partial starting and containment of lift traction machines

2. Limit switch. Limit the car to the highest or lowest position can not bear the operation of the assembly; Such as limit switch control.

3. Over switch. When the car is driven to the highest or lowest position, the car acts as ascending or descending. In order to prevent the car from hitting the top or sinking, the stage equipment should be removed to cut off the power supply and can not automatically reset the distance switch, and installed in the machine room, not installed in the well; Bumpers with the ability to receive kinetic energy and reduce impact should be installed.

4. Buffer. In order to increase the car to the top or bottom of the energy. Remove rubber or sponge from buffer and car contact to increase its impact energy; Rope groove slippage and so on lead to car suddenly fall incident

5. Safety pliers. In case of wire rope breakage due to heavy lifting. Safety clamps that cut off the control power and stop the car's fall should be removed from the car. Do not carry or carry people in a car without safety clamps. As a simple lift, there should be insurance assembly (insurance stop sales, etc.) to guard against sudden fall of the car when loading and unloading goods in the car; Any three floors above (including three floors) by person or with person lift.

6. Speed limiter. In case the speed exceeds the normal speed. Speed controller should be installed (below the second floor (including the second floor) can not be installed) this mechanism is integrated with the insurance clamp; Passenger compartment entrance and exit should be equipped with safety doors. Elevators used in public places, family dormitories and places with inflammable and explosive objects.

7. Stage equipment safety door. In order to prevent personnel head, hands, feet out of the well and objects falling vertical path. The vertical door should be closed, the car should be full door, well (hall door) not less than 1.8 meters high; The door electrical switch should be removed from the vertical door and the passenger car door

8. Door electric switch. In order to prevent accidents due to the vertical door, car door, car door is not closed. ; Door interlocks shall be provided on the vertical door and the passenger car door (two doors).

9. Safety grounding device. In case of electrical damage. The metal shell of electrical equipment and the metal structure of the elevator should be equipped with safety grounding device. The grounding line should operate multiple wires. The neutral line should not be used as the safety grounding line and its grounding resistance should not be greater than 4 ohms. The elevator control power can be cut off.

10. Speed limit wire rope switch. When the speed limit wire rope is off or broken. Disable the lift.