The invention provides an overload protection system, the overload protection system is arranged on a crane and drives a winch to act, the overload protection system comprises an oil tank, a pilot overflow valve, a first switch valve, a first control valve group, a second control valve group, a detection part and a motor, a hydraulic pump is arranged on the oil tank, and the hydraulic pump is connected with a first port of the motor through an oil inlet pipeline; a second port of the motor is connected with the oil tank through an oil return pipeline, a pilot-operated overflow valve is arranged between the oil inlet pipeline and the oil return pipeline, the oil inlet end of the pilot-operated overflow valve is connected with the oil inlet pipeline, and the oil outlet end of the pilot-operated overflow valve is connected with the oil return pipeline; the first control valve group comprises a first control switch valve, a first control reversing valve and a first control overflow valve; according to the structure, under the emergency condition, the pressure of the overflow valve can be adjusted, so that it is guaranteed that a hydraulic oil way can be kept stable, and under the emergency condition, a winch is controlled to quickly loosen a steel wire rope to achieve emergency rope abandoning.
本发明提供一种超载保护系统,所述超载保护系统设置在吊机上并驱动绞车动作,包括油箱、先导式溢流阀、第一开关阀、第一控制阀组、第二控制阀组、检测部件和马达,在油箱上设有液压泵,所述液压泵通过进油管道连接马达的第一端口,马达的第二端口通过回油管道连接油箱,在进油管道和回油管道之间设有先导式溢流阀,所述先导式溢流阀的进油端连接进油管道,先导式溢流阀的出油端连接回油管道;第一控制阀组包括第一控制开关阀、第一控制换向阀和第一控制溢流阀;上述结构,在紧急的情况下,能够对溢流阀的压力进行调节,从而保证液压油路能够保持稳定,在紧急情况下控制绞车快速松开钢丝绳实现紧急弃绳。
Overload protection system
一种超载保护系统
2025-01-10
Patent
Electronic Resource
Chinese
NTRS | 1979
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