The present invention belongs to the technical field of crane electrical control, and particularly relates to a crane ground operation position limitation control apparatus, which comprises a control circuit comprising a crane rising contactor auxiliary contact point, a crane descending contactor auxiliary contact point and a heavy hammer position limitation device, wherein the starting button, the stopping button and the main contactor are connected into the control circuit in a series connection manner, the descending contactor contact point and the rising contactor contact point are connected into the self-stick circuit in a parallel connection manner after the descending contactor contact point is connected with the heavy hammer position limitation device in series so as to form the series connection relation with the main contactor contact point, and the crane can normally rise and descent in the case of the normal suction closing of the total contactor KM0. With the crane ground operation position limitation control apparatus of the present invention, the double position limitation control on different broken circuit devices can be achieved, and the crane ground operation position limitation control apparatus has advantages of low cost, simple wiring, accurate control, high safety, easy maintenance, work efficiency improving, and the like.
Crane ground operation position limitation control apparatus
2015-09-09
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |
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