The invention discloses a jack for a foundation pile pull-out test, which comprises an outer valve body, an inner valve sleeve is movably sleeved in the outer valve body, an inner valve core of which the top end extends to the top of the inner valve sleeve is movably sleeved in the inner valve sleeve, and a pressure spring is movably sleeved at the bottom of the outer surface of the inner valve core; the inner valve element and the top of an inner cavity of the inner valve sleeve are in transmission connection through a pressure spring, the top of the inner valve element is movably sleeved with a fixing shaft, the two sides of the outer surface of the fixing shaft are fixedly sleeved with ejector blocks located at the top end of the inner valve element, and the inner valve element and the ejector blocks are movably connected through the fixing shaft. By arranging the inner valve sleeve, the inner valve element and the structures on the inner valve sleeve, the inner valve element and the structures on the inner valve sleeve, the perpendicularity between the cross beam c and the central axis of the jack d is effectively improved, and when the inner valve sleeve, the inner valve element and the structures on the inner valve element are driven to move upwards, and upward acting force is applied to the cross beam c; and the problem that a piston in the jack d is abraded due to inclined arrangement of the cross beam c is not easily aggravated.

    本申请公开了一种基桩抗拔试验用千斤顶,包括外阀体:外阀体的内部活动套接有内阀套,内阀套的内部活动套接有顶端延伸至其顶部的内阀芯,且在内阀芯外表面的底部活动套接有压力弹簧,并通过压力弹簧使得内阀芯与内阀套内腔的顶部之间形成传动连接,内阀芯的顶部活动套接有固定轴,固定轴外表面的两侧固定套接有位于内阀芯顶端的顶块,使得内阀芯与顶块之间通过固定轴形成活动连接。本发明对于内阀套、内阀芯及其上结构的设置,有效提高了横梁c与该千斤顶d中轴线之间的垂直度,并在带动内阀套、内阀芯及其上的结构向上发生移动,对横梁c施加向上的作用力时,不易因横梁c的倾斜布置而加剧对千斤顶d内部活塞的磨损问题。


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    Title :

    Jack for foundation pile pull-out test


    Additional title:

    一种基桩抗拔试验用千斤顶


    Contributors:
    MIAO JIE (author) / GAO JIWEI (author) / LIU PEIZHI (author) / CHEN YONGTAO (author) / ZHANG MINGLI (author)

    Publication date :

    2023-03-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    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 / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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