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A platform for research: civil engineering, architecture and urbanism
Hydraulic locking cushion valve, hydraulic system and land leveler
The invention relates to land leveler hydraulic systems and provides a hydraulic locking cushion valve, a hydraulic system comprising the same and a land leveler in order to solve the problems that anexisting land leveler shovel blade lifting hydraulic system buffers impact through an energy accumulator, and the cost is high and maintenance and installation arrangement are difficult. According tothe hydraulic locking cushion valve, the hydraulic system comprising the same and the land leveler provided by the invention, an oil port D and an oil port E of the hydraulic locking cushion valve communicate with an oil port F and an oil port G through hydraulic lock valves in the forward direction correspondingly. An oil port of a switching valve is connected with the oil port G, an oil port aof the switching valve communicates with or cut off with and oil port c, the oil port c of the switching valve communicates with the oil port a, and the oil port c communicates with an oil tank when areversing valve is in a neutral position. The oil port G of the hydraulic lock valve is connected with the control end of the switching valve, and the oil port G is connected with an oil port T through a throttle valve and an overflow valve. A switching valve spring cavity is connected between the throttle valve and the overflow valve. The hydraulic locking cushion valve is applied to the land leveler shovel blade lifting hydraulic system and can achieve the shovel blade impact buffering function without the energy accumulator, a solenoid valve and other elements. Accordingly, the cost is reduced, and the hydraulic locking cushion valve is convenient to maintain or install.
本发明涉及平地机液压系统，为解决现有平地机铲刀提升液压系统采用蓄能器缓冲冲击而导致的成本高、维护和安装布置难的问题；提供一种液压锁止缓冲阀及具有该阀的液压系统及平地机，其中液压锁止缓冲阀中D油口和E油口经液压锁止阀分别向F油口和G油口正向导通，开关阀c油口与G油口连接，a油口与c油口导通或截止，c油口与a油口导通并且换向阀中位时c油口与油箱连通；液压锁止阀的G油口与开关阀控制端连接并且G油口经节流阀和溢流阀与T油口连接，开关阀弹簧腔连接在节流阀与溢流阀之间。该阀应用于平地机铲刀提升液压系统中可实现缓冲铲刀冲击功能，无需使用蓄能器、电磁阀等元件，从而降低了成本，并便于维修或安装。
Hydraulic locking cushion valve, hydraulic system and land leveler
The invention relates to land leveler hydraulic systems and provides a hydraulic locking cushion valve, a hydraulic system comprising the same and a land leveler in order to solve the problems that anexisting land leveler shovel blade lifting hydraulic system buffers impact through an energy accumulator, and the cost is high and maintenance and installation arrangement are difficult. According tothe hydraulic locking cushion valve, the hydraulic system comprising the same and the land leveler provided by the invention, an oil port D and an oil port E of the hydraulic locking cushion valve communicate with an oil port F and an oil port G through hydraulic lock valves in the forward direction correspondingly. An oil port of a switching valve is connected with the oil port G, an oil port aof the switching valve communicates with or cut off with and oil port c, the oil port c of the switching valve communicates with the oil port a, and the oil port c communicates with an oil tank when areversing valve is in a neutral position. The oil port G of the hydraulic lock valve is connected with the control end of the switching valve, and the oil port G is connected with an oil port T through a throttle valve and an overflow valve. A switching valve spring cavity is connected between the throttle valve and the overflow valve. The hydraulic locking cushion valve is applied to the land leveler shovel blade lifting hydraulic system and can achieve the shovel blade impact buffering function without the energy accumulator, a solenoid valve and other elements. Accordingly, the cost is reduced, and the hydraulic locking cushion valve is convenient to maintain or install.
本发明涉及平地机液压系统，为解决现有平地机铲刀提升液压系统采用蓄能器缓冲冲击而导致的成本高、维护和安装布置难的问题；提供一种液压锁止缓冲阀及具有该阀的液压系统及平地机，其中液压锁止缓冲阀中D油口和E油口经液压锁止阀分别向F油口和G油口正向导通，开关阀c油口与G油口连接，a油口与c油口导通或截止，c油口与a油口导通并且换向阀中位时c油口与油箱连通；液压锁止阀的G油口与开关阀控制端连接并且G油口经节流阀和溢流阀与T油口连接，开关阀弹簧腔连接在节流阀与溢流阀之间。该阀应用于平地机铲刀提升液压系统中可实现缓冲铲刀冲击功能，无需使用蓄能器、电磁阀等元件，从而降低了成本，并便于维修或安装。
Hydraulic locking cushion valve, hydraulic system and land leveler
液压锁止缓冲阀、液压系统及平地机
LI LIANGZHOU (author) / LIU GUANGXI (author) / BAI JIANXIN (author) / LI DAYOU (author) / LU NANCHAO (author)
2020-05-08
Patent
Electronic Resource
Chinese
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