The invention discloses a hydraulic control valve for walking of an overhead working truck. The hydraulic control valve comprises a valve shell assembly, a valve element shaft and a first spring. A first cavity opening is formed in one end of the valve shell assembly, one end of the valve shell assembly is closed, a sealing ring is arranged on the inner wall of the valve shell assembly, and a second cavity opening is formed in the peripheral face of the valve shell assembly. The valve element shaft penetrates through the first cavity opening, one end of the valve element shaft is located outside the first cavity opening, and the other end is located in the valve shell assembly. The valve element shaft is provided with an annular sealing part, the annular sealing part and the inner wall of the valve shell assembly are sealed, the valve element shaft is provided with a first conical surface, and the first conical surface is provided with a groove. The interior of the valve shell assembly is divided into a first valve cavity, a second valve cavity and a third valve cavity in the axial direction, the first cavity opening communicates with the first valve cavity, the second cavity opening communicates with the second valve cavity, and the first valve cavity communicates with the second valve cavity through the groove. A first spring is located in the third valve cavity and pressed at the bottom of the valve element shaft and the bottom of the valve shell assembly respectively. The hydraulic control valve can control the overhead working truck to uniformly and slowly go downhill.

    本发明公开了一种高空作业车行走液压控制阀,其包括:阀壳组件、阀芯轴和第一弹簧。阀壳组件的一端具有第一腔口,阀壳组件的一端密闭,阀壳组件的内壁上具有一密封环,阀壳组件的外周面上开有第二腔口。阀芯轴穿过第一腔口,一端位于第一腔口外,另一端位于阀壳组件内。阀芯轴上具有一环形密封部,环形密封部与阀壳组件的内壁相密封,阀芯轴上具有第一锥面,第一锥面上具有一凹槽。阀壳组件的内部沿轴向分为第一阀腔、第二阀腔和第三阀腔,第一腔口与第一阀腔相连通,第二腔口与第二阀腔相连通,第一阀腔与第二阀腔通过凹槽相连通。第一弹簧位于第三阀腔内,分别按压于阀芯轴和阀壳组件的底部。本装置能够控制高空作业车均匀、缓慢下坡。


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    Title :

    Hydraulic control valve for walking of overhead working truck


    Additional title:

    高空作业车行走液压控制阀


    Contributors:
    ZHAO HANBIN (author) / GUANG LIN (author) / WANG XIAOWEI (author) / WU ANJI (author)

    Publication date :

    2021-10-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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