Traveling crane control loop

The invention discloses a traveling crane control loop and belongs to the technical field of traveling crane control loops. The traveling crane control loop comprises a first contactor KM1, a second contactor KM2, a third contactor KM3, a fourth contactor KM4, a fifth contactor KM5, a sixth contactor KM6, a transformer TC1, a time delay contact KT1, a first breaker QF1, a second breaker QF2, an overload limiter SQ1, a heavy punch limiter SQ2, a traveling crane control receiver, a remote controller, a first cart limiter SQ3 and a second cart limiter SQ4 and further comprises a main contactor KM8, a seventh contactor KM7 and a contactor KA1. In order to solve the problems that the KM1 controller is tightly stuck, and consequently a traveling crane lifting hook is out of control and rushes tothe top, the KM8 contactor is connected in the control loop in series, when the contactor KM8 is tightly stuck, the contactor KM1 is not loaded and cannot be tightly stuck, and therefore the controlloop cannot fail, and a co