What are the main safety guards for elevators?
Emergency door。 In order to prevent the head, hands and feet from sticking out of the hoistway and objects, the safety door should be installed at the entrance and exit of the passenger compartment. In public places, families and dormitory to use the elevator inflammable and explosive places, the vertical door should be closed, the car should be manmen, wells (Hall) of not less than 1.8 meters high;
Speed limiter. In order to prevent running faster than the normal speed, where more than three layers (including three floors) by people or people with elevator should be installed, the speed controller (two floors below (including two floors) can not be installed, the general mechanism) and the safety clamp together;
In order to prevent accidents due to elevator damage or improper operation of drivers, according to relevant state regulations, elevators should install the following necessary safety devices.1) brake. A brake that controls the starting and stopping of the machine part of the elevator so that the elevator can stop moving up or down in time;2) limit switch. The car drove up to the highest position limiting device or the lowest position can not continue to run;3) turn over switch. When the car reaches the highest or lowest position, if the limit switch is out of control, the car will continue to rise or fall. In order to prevent the car at the top or bottom, should be the process of switching device can cut off the power supply and can not automatically reset, and installed in the engine room, and can not be installed in the hoistway;4) buffer. In order to reduce the top or bottom of the car should be installed with the absorption of energy, energy and reduce the impact of the movement mechanism of buffer. At the same time, rubber or sponge is installed at the buffer and the car to reduce its impact energy;5) safety tongs. In order to prevent the sudden falling of the car due to the breakage of the hoisting rope, the slippage of the rope and so on, a safety tongs which can cut off the control power supply and stop the car from falling at the same time shall be installed on the car. No safety car is not a mere human or with people. If it is a simple lift, there shall be a safety device (safety stop pin) that prevents the car from falling suddenly when the goods are loaded and unloaded inside the car;
Elevator safety protection system is usually composed of two parts, mechanical safety protection device and electrical safety protection device. Mechanical safety protection device is mainly limited speed device and a safety clamp, buffer, brake, hall door lock and car door electric interlock, door safety protection device, car top security window, car top protective railing, baseboard; electrical safety protection shelter of electric shock directly and indirectly protection, electric fault protection electrical safety device, etc., some mechanical safety device often needs electric support and interlock to complete its action and reliable effect.
