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WORLDCONSTRUCTION BUILT WITH CCBT

Hunan CCBT Construction Machinery Co.,Ltd

ABOUT CCBT

Hunan CCBT Construction Machinery Co., Ltd. is located in the historic city-Changsha, which has been long reputed as the capital of construction machinery in China. We have been engaging in construction machinery industry for 10 years. Our company specializes in research,manufacturing,selling,maintenance and lease of hoisting machinery(tower crane and building hoist)and concrete machinery(concrete pump and concrete placing boom). CCBT has 15000 square meters modern industrial workshop, equipped with advanced equipment and devices and excellent production process. Our company is dedicated to development and manufacturing of construction engineering machinery, we can produce 2000 sets of hoisting machinery per year which are widespread used in China construction projects.

ABOUT PRODUCT

QTZ series of tower crane is one of CCBT’s leading products. With the working radius varying from 30m to 60m, QTZ tower crane is famous for its large operating ranges, varied working methods and wide uses. This series of tower crane has a horizontal jib frame, a jib trolley radius-changing mechanism. It is original in design, reliable in operation and satisfactory in shape. Equipped with all necessary safety devices, it shows a good speed-control capacity, satisfactory operating stability and high work efficiency. It can be widely used for the construction of high-rise hotels, residential buildings, high-rise industrial buildings, large-span factory building and tower-like buildings like tall chimneys.

Introduction as follows:

Tower Crane TC4808self-raising tower crane is designed based on summarizing the domestic experience of the same type of self-raising tower crane, and absorbing the latest achievements of science and technology abroad. It is a new generation self-raising tower crane.
This crane has the horizontal jib, trolley-jib, top slewing and hydraulic climbing system. The Max. Range of the hoisting jib is 48m, the Max. payload capacity is 5t, the rated hoisting moment is 500 kN•m (500t•m).
This crane holds a streamline form, which is artistic and perfect.
This crane is multi-work modes, and the suitable working range is wide. It can be installed in different modes, such as, fixed, attached and traveling mode.
The hoisting mechanism applies YZP converter motor. It has a wide speed adjustable range, stable operation and high reliability, and can achieve low speed in heavy load, high speed in light load. Drawing mechanism applies moment motor of converter to adjust the speed and DC brake. The slewing mechanism applies the moment motor of converter to adjust the speed and DC brake. It has larger overload capacity and the advantage of starting up at heavy load. These ensure that the crane can start up and brake more stably and the operation is safer and more reliable.
By using the added standard section and hydraulic climbing system to raise the crane, the hoisting height of the crane rises with the building height rises, the hoisting performance keeps quite well at various heights
The cab of the crane is streamline form, it is installed at the top of the crane, field of vision is broad, and the operation is safe, comfortable and convenient. The cab can control various mechanisms of the crane by advanced ganged console.
The safety and protection device of the crane is also complete and reliable, including hoisting moment limiter, hoisting load limiter, slewing limiter, radius- variation limiter, height limiter, the rope-break and shaft-break protection device of the jib trolley, wire cable twisting protection device and brakes of the slewing, radius-variation and so on. And there are also platforms, rails and other safety devices on it. All these ensure the crane runs safely and reliably.
TC4808 self-raising tower crane is designed with advanced parameters, reliable performance, nice appearance reasonable construction and high quality. It has advanced automatic control system. It can perfectly meet the construction requirements of the high buildings and industrial buildings.

Main technology parameters

Model	QTZ50A(TC4808)
Max Working Radius (m)	48
Free Height Under Hook (m)	34 (13 mast sections)
Max Load (T)	5
Tip Load (T)	0.8
Max Height Under Hook (m)	140
Wall Ties for Max Height (sets)	6
Main Material Specs (mm)	Angle Steel 160*12
Mast Section Dimension (m)	1.5*1.5*2.5
Hoisting Speed (m/min)	70/35/9
Min Steady Falling Speed (m/min)	4.5
Slewing Speed (r/min)	0-0.7
Radius-changing Speed (m/min)	40/20
Jacking-up Speed (m/min)	0.5
Total Motor Power (kw)	21.1
Independent Structure Weight (kg)	25522