The invention provides a super-lift winch lockpin device control system which comprises a super-lift winch, a hydraulic motor used for driving the super-lift winch to rotate, a first reversing valve used for controlling the hydraulic motor, a tension oil cylinder adapting to the super-lift winch, a lockpin oil cylinder connected with the tension oil cylinder, and a second reversing valve used for controlling the lockpin oil cylinder, wherein the first reversing valve is a three-position four-way valve with a meso-position function of an O type, the second reversing valve is a three-position four-way valve with a meso-position function of a Y type, and a single-way valve used for preventing hydraulic oil from backwards flowing from an oil inlet is connected to the oil inlet of the second reversing valve. According to the super-lift winch lockpin device control system, the single-way valve is arranged at the oil inlet of the second reversing valve, when the lockpin oil cylinder operates, hydraulic oil in a rodless cavity of the lockpin oil cylinder can be prevented from backwards flowing when a pressure of a hydraulic system fluctuates; the lockpin oil cylinder can be in a floating state by virtue of the meso-position function of the Y type of the second reversing valve when not operating. The invention further discloses a crane with the super-lift winch lockpin device control system.
Super-lift winch lockpin device control system and crane
2015-04-08
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |
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