The invention relates to the technical field of prestress tensioning equipment, in particular to a prestress tensioning jack and a using method thereof.The prestress tensioning jack comprises an outer cylinder, a middle cylinder arranged in the outer cylinder, a first piston arranged at the bottom of the middle cylinder, a cylinder outlet oil port and a cylinder return oil port which are formed in the positions, on the two sides of the first piston, of the outer cylinder, and an inner cylinder arranged in the middle cylinder; the inner cylinder is sleeved with the first piston in a sliding and sealing mode, a bottom shell is arranged at the bottom of the inner cylinder, and a pressurization mechanism is arranged on the bottom shell; the pressurizing mechanism comprises a bottom cylinder arranged below the outer cylinder, a second piston sleeved in the bottom cylinder in a sliding and sealing mode and a third piston sleeved in the outer cylinder in a sliding and sealing mode, the second piston and the third piston are of an integrated structure, the second piston and the third piston are both movably sleeved on the inner cylinder, and the inner cylinder, the second piston and the third piston form a conveying channel. The invention provides a prestress tensioning jack and a using method thereof. The prestress tensioning jack widens the stress application range and enhances the stability of an anchoring system in the tensioning process, and the prestress tensioning jack is used for overcoming the defects in the prior art.

    本发明涉及预应力张拉设备技术领域,具体涉及一种预应力张拉千斤顶及其使用方法,包括外缸、外缸内设置的中缸、中缸的底部设置的第一活塞以及第一活塞两侧的外缸分别设置有出缸油口和回缸油口,所述的中缸内设置的内缸,第一活塞滑动密封套装在内缸上,内缸的底部设置有底壳,底壳上设置有增压机构;所述的增压机构包括外缸下方设置的底缸、底缸内滑动密封套装的第二活塞以及外缸内滑动密封套装的第三活塞,第二活塞与第三活塞为一体结构,第二活塞和第三活塞均活动套装在内缸上,内缸与第二活塞和第三活塞形成输送通道。本发明提供一种提升施加应力范围,增强张拉过程中锚固体系稳定性的预应力张拉千斤顶及其使用方法,用于克服现有技术中缺陷。


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    Title :

    Prestress tensioning jack and using method thereof


    Additional title:

    一种预应力张拉千斤顶及其使用方法


    Contributors:
    LI JINLING (author) / WANG DAYONG (author) / SUN HONGWEI (author) / LIANG YU (author) / AI QING (author) / ZHANG XINGZHONG (author)

    Publication date :

    2025-05-13


    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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