The rise of the tower crane is divided into the internal roof support and external roof support. Inside the top support for the hydraulic system directly inside the standard section of the top high to the installation height, outside the top support for the use of their own tower crane will be standard section of the crane to a specified height, and then put into the elevated section, the hydraulic system jacked up to a specified height. Tower crane is the most commonly used lifting equipment on construction sites, also known as "tower crane", to a section of a section of the long (high) (referred to as the "standard section"), used to hoist the construction of reinforcing steel, corrugated wood, concrete, steel pipe and other raw materials for the construction. Tower crane is an essential equipment on the construction site.
The function of the tower crane tip is to bear the jib pull rope and balance arm pull rope from the upper load, and through the structural components of the slewing tower, turntable, bearing seat, etc. Directly through the turntable transfer to the tower structure. Self-elevating tower top have cut off cone column type, forward or backward tilting cut off cone column type, herringbone frame type and diagonal bracing frame type. Where on the rotary tower are required to set the balance weight, its function is to support the balance weight, used to constitute the design requirements of the role of the opposite direction of the lifting moment and the balance of the moment. In addition to the balancing weight, but also often installed in its tail lifting mechanism. The reason why the lifting mechanism with the balancing weight together with the balancing arm placed at the end of the balance, one can play a part of the role of the counterweight, and the second is to increase the distance between the rope drum and the tip of the tower guide wheel, in order to facilitate the arrangement of the wire rope winding and to avoid the phenomenon of chaotic rope. The amount of balancing weight and balancing arm length inversely proportional to the relationship between the length of the balancing arm and the length of the lifting arm and there is a certain proportion. Balance weight is considerable, light tower generally at least 3 ~ 4t, heavy to nearly 30t.
Hanging tower is a hospital modern operating room essential gas supply medical equipment, mainly used for operating room oxygen, suction, compressed air, nitrogen and other medical gases, such as the terminal transfer. It is controlled by motor to raise and lower the equipment platform, which is safe and reliable; the balanced design ensures the level of the equipment platform to ensure the safety of the equipment; the drive of the motor ensures the fast and effective operation of the equipment.