China 12t QTZ200(7020) Hydraulic Tower Crane Manufacturers

China 12t QTZ200(7020) Hydraulic Tower Crane Manufacturers

1. 12t tower crane, Jib=70m, Max Load=12T; Tipload=2.0T

2. hydraulic lifting tower crane/hammed head topkit construction tower crane

3. China-made high quality long boom length tower crane, China good tower crane manufacturers Hongda Tower crane with best price 

4. high efficiency, CE approved, ISO and GOST certification, oversea service available

Safety devices: 1): hoist height limit 2): over speed limit 3) over load limit 4):lifting moment limit 5): slewing angle limit 6): emergency stop button 7):obstruction light (tip of jib, tower head) 8): wind lock device 9): black box

Description of China Hongda12t tower crane QTZ200(7020)

1 Hoisting Mechanism
Three-gear speed modulation by electrical motor or frequency conversion, giant winch.
2 Rotation Mechanism
Speed modulation with frequency conversion, stable break, accurate position, outstanding on performance and operation all around the world.
3 Luffing Mechanism
Speed modulation with frequency conversion, less concussion, stable operation.
4 Control System
PLC control, auto diagnosis on electric malfunction, corresponding alarm on light and sound, key components adopting international top brand product.
5 Security & Protection Mechanism
Besides security mechanism usually used in domestic tower crane adopted, Hongda tower crane adopted lots of advanced mechanism self-developed by Hongda, to keep the security of the tower crane and convenient operation, such as unique double tighten mechanism on luffing steel cable, anti-break mechanism on sliding vehicle, anti-drop mechanism on standard section, speedy link between rotary body, hoisting boom and balance boom.
6 Structure
Through advenced design, mechanical-electrical integration design, CAD supporting design, optimization design, modularization design, makes Hongda tower crane's steel structure haveing outstanding intensity, firmness and anti-fatigue capability, outstanding performance and reliability. With beautiful profile, it embodies the design standard of Hongda.