The invention relates to the field of hydraulic pressure, in particular to a hydraulic winch emergency lowering loop which comprises an oil port A, an oil port B, an oil port R, a first hydraulic control reversing valve, a manual reversing valve, a manual pump, a first shuttle valve, a second shuttle valve, a pressure reducing valve, a second hydraulic control reversing valve, a balance valve, a hydraulic winch and a reversing valve. The two ends of a first pipeline where the oil port A is located are connected with the reversing valve and the hydraulic winch respectively, the two ends of a second pipeline where the oil port B is located are connected with the reversing valve and the hydraulic winch respectively, a third pipeline and a fourth pipeline are arranged between the first pipeline and the second pipeline, a first shuttle valve is arranged on the third pipeline, and a hydraulic control reversing valve and a balance valve are arranged on the fourth pipeline. The first shuttle valve is connected with a sixth pipeline through a fifth pipeline, a second shuttle valve is arranged on the fifth pipeline, and the second shuttle valve is sequentially connected with a pressure reducing valve, a hydraulic control reversing valve and a hydraulic winch in series. And the pipeline VI is sequentially connected with a manual pump, a manual reversing valve and a hydraulic control reversing valve in series. When power failure occurs or an oil supply pump breaks down, emergency lowering of the hydraulic winch can be conducted without power supply or fault solving.
本发明涉及液压领域,具体地涉及一种液压绞车应急下放回路,包括油口A、油口B、油口R、液控换向阀一、手动换向阀、手动泵、梭阀一、梭阀二、减压阀、液控换向阀二、平衡阀、液压绞车和换向阀;油口A所在管路一两端分别与换向阀、液压绞车连接,油口B所在管路二两端分别与换向阀、液压绞车连接,管路一与管路二之间设置管路三和管路四,管路三上设有梭阀一,管路四上设置液控换向阀和平衡阀;梭阀一通过管路五与管路六连接,管路五上设置梭阀二,梭阀二与减压阀、液控换向阀、液压绞车依次串联;管路六上依次串联连接手动泵、手动换向阀、液控换向阀。本发明在遇到停电或供油泵故障时,无需供电或解决故障,即可进行液压绞车的应急下放。
Emergency lowering loop of hydraulic winch
一种液压绞车应急下放回路
2023-11-07
Patent
Electronic Resource
Chinese
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