What are the safety devices for tower cranes?
(3) the lifting height limiter, lifting height limiter is used to restrict access to the hook jib head or trolley before, or is dropped to the lowest point (ground or below ground Ruoganmi) before the lifting mechanism of automatic power-off and stop working, to avoid lifting hook over hoisting device touch the boom and the bad.(4) the amplitude limiting device is used to limit the boom does not exceed the limit position in the pitch. An alarm is sounded when the lifting pitch reaches a certain limit, and the power is automatically cut off when the limit position is reached.(5) stroke limiter of car stroke limiter: a trolley type jib head and root, to cut off the circuit car traction mechanism, prevent car offside. Cart travel limiter: used to prevent the crane from derailing.
(6) the rail clamp is used to clamp the rail, prevent the crane from walking by wind in the strong wind, and cause the tower crane to derail and overturn the accident.(7) the wind meter automatically records the wind speed, and automatically alarms when more than six wind speed is over.(8) the anti stripping device of the steel wire rope is mainly used to prevent the steel wire rope from disengaging from the pulley groove during the transmission process(9) the hook insurance prevents the lifting of the steel wire rope because of the excessive angle or the wrong hook, and causes the lifting wire rope to be broken off and the suspension falling accident.
Safety device for tower crane(1) lifting moment limiter, tower crane in lifting objects, the lifting radius and weight of the crane product is a constant number. According to this principle, a lifting torque limiter has been developed, the main function is to prevent overloading of the safety devices. The moment limiter only acts as a protection against the overload torque in the vertical vertical plane of the tower crane arm, and can not protect the tilting accidents caused by oblique hanging, wind load, rail inclination or collapse, etc..(2) weight limiter weight limiter's role is to protect the goods lifting weight does not exceed the maximum allowable weight of tower crane, tower crane is used to prevent the load exceeds the maximum rated load, avoid mechanical damage accident.
