Crane lifting height limiter

  Gantry  bridge crane  hoisting mechanism shall be fitted with lifting height limiter. Driven by an internal combustion engine, the middle of no electrical, hydraulic, pneumatic and other transmission links and direct mechanical connection hoisting mechanism, can be equipped with lights or audible warning device to replace the limit switch.
       When the  gantry crane  extract device design requirements up to the upper limit position, the lift should be immediately cut off the power source. In the upper limit position, the height should be sufficient spare to accommodate up brake stroke requirements. In exceptional circumstances, such as lifting the molten metal, should be installed to prevent overtravel hoisting the second stage lifting height limiter, the second stage lifting height limiter should be breaking higher a power source.
       When necessary, should be set down depth limiter; when gantry crane extract device design requirements down to the lower limit position, should be able to immediately cut down the power source.
        bridge gantry crane  above the direction of movement after the power is turned off, you can still carry the opposite direction (the second stage lifting height limiter exception).