A gantry crane can actually be considered a variation of an overhead crane. Gantry cranes are generally used for outdoor loading and unloading of goods and other operational content.
One, according to the gantry frame structure form
Divided into gantry crane and cantilever gantry crane
1. full gantry crane: the main beam without overhanging
2. Trolley is carried out within the main span.
3. Semi-gantry crane: the legs have a height difference, which can be determined according to the civil construction requirements of the use site.
Cantilever portal crane
1. Double cantilever gantry crane: the most common form of structure, the force of its structure and the effective use of the site area are reasonable.
2. Single cantilever gantry crane: this structural form is often chosen due to the limitations of the site.
Second, according to the form of the main beam
1. Single main girder portal crane
Single main girder gantry crane structure is simple, easy to manufacture and install, its own quality is small, the main beam is mostly off-track box frame structure. Compared with double main girder portal crane, the overall stiffness is weaker.
2. Double main girder portal crane
Double main girder gantry cranes have strong load carrying capacity, large span, good overall stability, and many varieties, but their own quality and the same weight of single main girder gantry cranes compared to larger, the cost is also higher. According to the different structure of the main beam, it can be divided into two forms of box beam and truss. At present, the box structure is generally used
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