Gantry crane consists of a gantry, a trolley running mechanism, a lifting trolley and an electrical part. Some gantry cranes have legs on one side and the other side supports running on a factory building or trestle bridge, called a semi-gantry crane. The overhead crane gantry upper bridge (including the main beam and end beam), legs, lower beams and other parts. Howerver, do you know the classfication of gantry crane?
According to the main beam form, gantry cranes can be divided into the following two categories:
Single beam gantry crane
The single-beam gantry crane has a simple structure, is easy to manufacture and install, and has a small mass of its own. The main beam is mostly an off-track box-shaped structure. Compared with double-girder gantry cranes, the overall stiffness is weaker. Therefore, when the weight Q≤50t and the span S≤35m, this form can be used. Single-gantry gantry cranes have L-shaped and C-shaped door legs. The L-shape is easy to manufacture and install, and the stress conditions are good. The quality of the L-shape is small. However, the space for lifting cargo through the legs is relatively small. The C-shaped legs are made to be inclined or curved so as to have a large lateral space for the cargo to pass through the legs.
Double beam gantry crane
Double-beam gantry cranes have strong bearing capacity, large span, overall stability, and many varieties, but their own quality is larger and their cost is higher than single-gantry gantry cranes with the same weight. According to the different main beam structure, it can be divided into two forms of box beam and truss. Generally more box-shaped structure.