The overload protection system comprises an oil tank, a pilot overflow valve, a first switch valve, a motor and a first control valve bank, a hydraulic pump is arranged on the oil tank and connected with a first port of the motor through an oil inlet pipeline, and 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; by means of the structure, under the emergency condition, the adjusting pressure of the overflow valve can be adjusted and relieved, and therefore the winch is controlled to quickly loosen the steel wire rope to achieve emergency rope abandoning.
本发明提供一种绞车的超载保护系统,包括油箱、先导式溢流阀、第一开关阀、马达和第一控制阀组,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,能调整溢流阀的调节压力,并对溢流阀的调节压力进行泄压,从而控制绞车快速松开钢丝绳实现紧急弃绳。
Overload protection system of winch
一种绞车的超载保护系统
2025-01-07
Patent
Electronic Resource
Chinese