The invention discloses a multi-stage oil cylinder telescopic device and a method for installing the multi-state oil cylinder telescopic device on a telescopic crane, and relates to the technical field of ship manufacturing. The device comprises at least two telescopic oil cylinders fixed to a crane lifting arm and connected in series through a hydraulic pipe, each telescopic oil cylinder is provided with four oil ports, and the crane lifting arm comprises a fixed arm, a first telescopic arm, a second telescopic arm and a third telescopic arm. Compared with the prior art, the device is simple in structure, the structure of the whole crane is stable, stability and sealing performance of the oil cylinders are good, operation is convenient, maintenance and replacement are convenient, and multi-stage stretching and retracting of the telescopic crane lifting arm for a ship can be achieved.


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    Title :

    Multi-stage oil cylinder telescopic device and method for installing multi-state oil cylinder telescopic device on telescopic crane


    Contributors:
    WANG HAIJIANG (author) / CHEN YI (author) / HAN JIWU (author) / AN WANPING (author) / LIU BIN (author)

    Publication date :

    2015-04-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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