The tower crane has a large working space, and is mainly used for the vertical and horizontal transportation of materials and the installation of building components in the construction of house buildings. Tower crane is composed of three parts: metal structure, working mechanism and electrical system. Metal structure includes tower body, boom and base. The working mechanism has four parts: lifting, amplitude changing, turning and walking. The electrical system includes motors, controllers, power distribution cabinets, connecting lines, signals and lighting devices. Tower cranes are divided into two categories: upper slewing tower cranes and lower slewing tower cranes. The bearing capacity of the former is higher than that of the latter. What we have seen in many construction sites is the tower crane with the upper rotary type, the upper lifting and the joint height.
From the perspective of technical development of tower cranes, although new products emerge in an endless stream, new products have improved in production efficiency, easy operation, easy maintenance and reliable operation, but the technology of tower cranes has not changed fundamentally. The research of tower crane is moving towards the combined development. The so-called combined type is to take the tower body structure as the core, decompose the tower body into several parts according to the structural and functional characteristics, and divide the parts into several modules according to the principle of serialization and generalization, following the principle of the modular system. According to the parameter requirements, select appropriate modules to form tower cranes with different technical performance characteristics to meet the specific needs of construction.
