Rubber-tyred gantry cranes used imported Mitsubishi wheel crane

Gantry crane is a variant of bridge crane. In the port, mainly used for outdoor yard, yard goods, bulk cargo loading and unloading operations. Its metal structure shaped like a door frame, carrying the main beam install two feet down, you can walk directly to the track on the ground, both ends of the main beam may have overhanging cantilever. Gantry cranes have space utilization, large operating range, wide adaptation, versatility, etc., it is widely used in the port yard. How to choose one, choose gantry crane it complies with the relevant provisions of General Purpose Gantry GB / T14406-1993 and GB5905-86 of. In general, from the weight of 50t or less in the span of less than 35m, no special requirements, should use a single main beam. If you require a large gate leg width, high operating speed, or frequent lifting heavy items, grew up in pieces, then should choose the double girder gantry crane. Second, the length of the span and cantilever gantry crane span is an important factor affecting the quality of the crane itself. Selection, to meet the conditions of use and equipment Subject to span series of standards, should be minimized span. Third, to determine the principles wheelbase of (a) meet the requirements of the stability of the gantry crane along the track direction; (b) the overall dimensions to be able to pass the legs flat steel; (c) pay attention to the tread B and span S proportional relationship, and generally Wheelbase B = (1 / 4-1 / 6) S. Fourth, the gantry crane pitch size determined in the work, should be left between the external dimensions of gantry cranes and container yard cargo and transport vehicles passage certain spatial dimensions, in order to facilitate loading and unloading operations. When the general transport vehicle loading and unloading in the span, and doors should be kept above the legs have 0.7m spacing. Spreader should not work more than 0.5m spacing and transport vehicles, cargo when the legs get married, there should be more than 0.5m spacing.