The gantry crane is compact in structure and easy to operate, and its bridge is firmly supported on the ground by the supports on both sides. It is like a dragon perched on the clouds, so the gantry crane is also called the gantry crane. The working place of the gantry crane is generally in the outdoor environment such as the seaside port, the railway side or other large industrial plant areas, while the temperature in the outdoor environment is relatively violent, for example, in some places with relatively bad environment, dust and harmful gases are obviously bad, and during the working process, negative factors such as vibration and impact are unfavorable to it, and more serious, when the capacity of the power supply transformer becomes smaller When the section of power supply cable is reduced, it often causes transient voltage shortage.



Generally speaking, the universal gantry crane is relatively common and practical. It is composed of gantry, crane running mechanism, lifting trolley and electrical parts. The semi-portal crane is only supported on the ground on one side, and the structure of the gantry consists of upper bridge, leg, lower beam and other parts. At present, the operating range of the crane has been expanded to a large range, and the main beam can be converted into a cantilever, or the operating range of the gantry crane can be promoted and applied in a certain area by using the lifting trolley.

The gantry crane can be divided into hook gantry crane, grab gantry crane, electromagnetic gantry crane and dual-purpose or three-purpose gantry crane according to the different structural characteristics. Among them, the hook gantry crane is suitable for large sites, such as stations, ports, large enterprise factories or freight yards and warehouses; The grab gantry crane is applicable to some relatively scattered and large-scaled transportation; Dual-use or three-use gantry crane is used for the site where materials change frequently.