Several categories of tower crane
Crane (Crane) is a kind of Crane machine, which is a kind of mechanism for circulation and intermittent motion. A work cycle including: fetch up the items from the fetch, lowered level and then move to the designated place, then reverse movement, to return the fetch device in situ, for the next cycle.
It is divided into mobile tower crane and stationary crane. Two, the structural characteristics of the heavy arm can be divided into the frame crane with the heavy arm (arm) and the changing arm of the car. Three, according to the structure of the tower structure, can be divided into lower turning (tower turning) and upper turning (tower not turning) tower crane. Four, according to the crane installation, can be divided into to folding transportation, whole set up by rapid installation of tower crane and spellers should be carried out by means of auxiliaries and dismantling of tower crane. The structure can be divided into flat-headed tower cranes and pointed tower cranes.
Tower crane, also known as tower crane, originated in Western Europe. The moving arm is mounted on a rotating crane at the top of the tower. The operation space is large, mainly used for the vertical and horizontal conveyance of the material in building construction and the installation of building component. It consists of three parts: metal structure, work mechanism and electrical system. The metal structures include the tower, the arm and the base. The work body has four parts: rising, changing, turning and walking. Electrical systems include motors, controllers, power distribution cabinets, wiring, signals and lighting fixtures.
The tower machine is divided into two kinds of rotary tower machine and the bottom rotary tower machine. The former has a higher bearing capacity than the latter, and what we have seen in many construction sites is the tower machine which has the upper and higher lift of the roof. The ability to move is divided into: walking and fixing. Fixed fixed tower crane tower, installed on the basis of the whole piece of concrete, or installed on the basis of the form X to concrete, walking type can be divided into the crawler type, vehicle type, four types of wheel and rail. In the construction of the house general use is fixed type. It can be divided into two kinds of horizontal arm frame car and movable arm. According to its installation form, it can be divided into three kinds: self-promotion, overall quick dismantling and assembling. Is the most widely used under rotation, quick disassembling, rail type tower crane, and can be used with (track type, fixed type, adhesion and climb inside) ZiSheng of tower crane.
