| 摘要 |
FIELD: machine building.SUBSTANCE: two mounting gantries (1) and (2) are used at gantry crane installation, prior to lifting of a crane longitudinal girder (3) guide apparatuses (10) are attached to it by mounting hinges (9), ends of bars (11) are pivotally connected to the guide apparatuses and their other ends are pivotally connected to balance trolleys (8). Sections (13) of which supporting poles consist are installed by one in each guide apparatus and attached to them, the longitudinal girder is lifted by strand jacks (6) to the intermediate position - up to the vertical position of the said sections of the supporting poles. Truss systems (14) are mounted by coupling the bars with the guide apparatuses, with each other and with the balance trolleys. Afterwards the mounting gantries are demounted, the strand jacks are installed on the guide apparatuses, strand jack cross members (7) are put under the lower parts of the sections, the sections are disconnected from the guide apparatuses and moved by the strand jacks. Then the lifted sections are fixed in respect to the guide apparatuses, the upper parts of the next supporting pole sections are attached to their lower parts, the strand jack cross members are put under their lower parts, the sections are disconnected from the guide apparatuses and with their help the supporting pole sections are moved together with the longitudinal girder into the next intermediate position. A gantry crane comprises a longitudinal girder with at least one hoisting trolley installed on it and two supporting poles resting against two balance trolleys each. Each supporting pole consists of several rigidly intercoupled vertical sections, a guide apparatus for the supporting pole sections and a truss system comprising two bars pivotally connected to the guide and the balance trolleys, cross beams coupling the bars, and diagonal braces coupling the bars with the cross beams. The upper sections of the supporting poles are attached to the longitudinal girders and their lower sections are attached to the guide apparatuses.EFFECT: simplified mounting and demounting.2 cl, 5 dwg |
