A safety tool for opening a well lid comprises a base. An inclined telescopic support and a well lid fixing mechanism are arranged on the side of the base, and a well lid lifting mechanism is arranged on the side face of the telescopic support. The telescopic support comprises an upper support of a hollow structure and a lower support of a hollow structure. The upper portion of the lower support stretches into the upper support. A strip-shaped opening is formed in the side face of the upper support, and a vertical plate is arranged on the side face of the upper end of the lower support and arranged outside the strip-shaped opening. The well lid lifting mechanism comprises a first chain wheel and a second chain wheel. A chain is arranged on the first chain wheel and the second chain wheel and fixedly connected with the vertical plate. A rotary handle is arranged at the outer end of a first rotary shaft. A ratchet mechanism is arranged at the top of the upper support and comprises a ratchet fixed to the first rotary shaft, and a pawl matching the ratchet is arranged on the side face of the ratchet. The well lid fixing mechanism comprises a vertical rod. A cross rod is arranged at the lower end of the vertical rod, and a bearing is arranged at the upper end of the vertical rod and on the lower support. In the opening process of the well lid and after the well lid is opened, the well lid can be fixed conveniently, and the well lid is prevented from accidentally falling off.


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    Title :

    Safety tool for opening well lid


    Contributors:
    MENG QINGRUI (author) / CUI LIYONG (author) / WANG PEIYUE (author) / MOU ZEGANG (author) / LIAN LEI (author) / ZHU XIUJIE (author)

    Publication date :

    2015-11-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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



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