2011年11月29日星期二

Construction Elevator - Tower Crane


A crane is a type of machine can be used both to lift and lower materials and to move them horizontally. It uses one or more simple machines like a hoist to create mechanical advantage and thus move loads beyond the normal capability of a human. And tower cranes, as a modern form of balance crane, are a common fixture at any major construction site.

They are pretty hard to miss. They often rise hundreds of feet into the air, and can reach out just as far. The construction crew uses the tower crane to lift steel, concrete, large tools and a wide variety of other building materials. Their configuration offers several advantages over more traditional cranes, including reduced space requirements, higher vertical lift, increased capacities and quiet electrical operation. In high-rise buildings, tower cranes can route through the elevator shaft and further easing space requirements. Here are huge choices from China suppliers and manufacturers to your demands:

All tower cranes consist of the same basic parts: the base, the mast, the slewing unit, the working arm, the machinery arm, the counter weights and the operator’s cab.
1, The base is bolted to a large concrete pad that supports the whole body and connects to the mast, which gives the tower crane its height. Attached to the top of the mast is the slewing unit, the gear & motor which allow the crane to rotate.

2, On top of the slewing unit are three parts: The long horizontal working arm is the portion of the crane that carries the load. A trolley runs along the arm to move the load in and out from the crane’s center. The shorter horizontal machinery arm, which contains the crane’s motors that lifts the load, along with the control electronics drive it and the cable drum as well as the large concrete counter weights.

Nowadays tower crane is the most important lifting mechanism on the construction site of any purpose and China has become the world’s civilian power production of the tower crane and the world’s major demand markets. Find more about China tower crane manufacturers, China tower crane suppliers, and China tower crane products:


Resource:
www.ecvv.com is an innovative and comprehensive business portal in China, dedicated to saving costs for Chinese SMEs to find buyers and export to overseas markets.

<a href="http://www.ecvv.com">www.ecvv.com</a> is an innovative and comprehensive business portal in China, dedicated to saving costs for Chinese SMEs to find buyers and export to overseas markets.

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