The invention provides a control valve structure, a hydraulic control system and a tractor. The control valve structure comprises a main valve body; the main valve rod is movably arranged in the main flow path in a penetrating manner; the bypass valve and the cushion valve are arranged on the second branch flow path at intervals, and the main flow path communicates with the second branch flow path located between the bypass valve and the cushion valve; when the main valve rod is located at the plugging position, the inlet valve is closed, the bypass valve is opened, and the cushion valve is closed, so that fluid in the main flow path flows back through the first backflow flow path; when the main valve rod is located at the avoiding position, the inlet valve is opened, and the bypass valve and the cushion valve are closed, so that fluid in the main flow path flows out through the first communication flow path; when the main valve rod is located at the buffering position, the inlet valve and the bypass valve are closed, and the buffering valve is opened, so that fluid in the main flow path flows out through the second backflow flow path. By means of the technical scheme, the technical problem that in the prior art, impact pressure borne by a control valve structure during position switching is large can be solved.

    本发明提供了一种控制阀结构、液压控制系统以及拖拉机,控制阀结构包括:主阀体;主阀杆可移动地穿设在主流路内;旁通阀和缓冲阀间隔设置在第二分支流路上,主流路与位于旁通阀和缓冲阀之间的第二分支流路连通;当主阀杆处于封堵位置时,入口阀关闭、旁通阀打开、缓冲阀关闭,以使主流路内的流体经第一回流流路回流;当主阀杆处于避让位置时,入口阀打开、旁通阀和缓冲阀均关闭,以使主流路内的流体经第一连通流路流出;当主阀杆处于缓冲位置时,入口阀和旁通阀关闭、缓冲阀打开,以使主流路内的流体经第二回流流路流出。通过本发明提供的技术方案,能够解决现有技术中的控制阀结构在位置切换时受到的冲击压力较大的技术问题。


    Access

    Download


    Export, share and cite



    Title :

    Control valve structure, hydraulic control system and tractor


    Additional title:

    控制阀结构、液压控制系统以及拖拉机


    Contributors:
    LIU YONGJIAN (author) / TAN HONGYANG (author) / SHENTU JUNYANG (author) / LIU ZHAODONG (author) / YANG XUJIE (author) / WANG QINGHONG (author) / REN GUANGQING (author) / ZHANG KAIHUA (author) / ZHENG ZUWEI (author) / WANG HAILIANG (author)

    Publication date :

    2024-02-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



    Load-sensitive hydraulic control valve bank, tractor hydraulic system and tractor

    HAN ZUOPENG / LIU XIUZHI / HE ZEHUA et al. | European Patent Office | 2025

    Free access

    Low-pressure control valve set, electro-hydraulic control system and tractor

    CAI ERPENG / SHENTU JUNYANG | European Patent Office | 2021

    Free access

    Brake hydraulic system for tractor, control method and tractor

    LIU YONGJIAN / TAN HONGYANG / SUN WENYONG et al. | European Patent Office | 2024

    Free access

    Electro-hydraulic control system and tractor

    SHENTU JUNYANG / LI DEFANG / SUN YOUTAO et al. | European Patent Office | 2022

    Free access

    Tractor saddle lifting control hydraulic system

    WANG DONGXIONG / TUO MINGWEI / ZHANG MINGMING et al. | European Patent Office | 2025

    Free access