Self-raising tower crane QTZ, which is a new-style elevating machinery specially designed for the construction of tall buildings and equipment installation, is a type of self-raising multi-purpose tower crane equipped with level arm support, and it allows trolley derricking and upper slewing.its jib maximum length is 70m, with maximum lifting load of 12000KG. Main features of the tower crane are given below:

1. The tower crane is provided with comprehensive adaptability. It can fully satisfy the requirements of both the civil building construction in medium/small-size cities and construction of tall/multistory civil buildings in large/medium-size cities. Furthermore, it is also applicable to the construction of multi-story wide-span industrial premises and tower structures such as chimney stalks and silos etc. constructed as per slip-form techniques, or the handling operations at harbors or freight yards.

2. It allows easy erection and disassembly. Hydraulic jacking device is adopted to increase or reduce the number of standard sections for the tower mast so that the hoisting altitude of tower crane may adapt to the change in building height.

3. It is characterized for high operating speed, perfect speed regulation performance, stable operation, high efficiency, and its hoisting mechanism may basically realize heavy load low speed or light load high speed. its trolley traction mechanism may operate at either two speeds so as to satisfy the requirement of tasks; its slewing mechanism is equipped with normal-open electromagnetic stopper so that the tower crane may be set in place accurately for the sake of safe operation.

4. It is equipped with complete, sensitive, and reliable safety protection system, such as weight limiting device, moment limiting device, hoisting altitude limitator, derricking travel limitator, and slewing angle limitator etc.; its hoisting rope is equipped with antitwist device, derricking trolley is equipped with rope breakoff preventor, shaft breakoff preventor, hoist rope guide, derricking/ hauling rope tensioner etc. so as to ensure normal operation of the tower crane. In addition, it is also equipped with the labor-safety protective equipment such as broadstep and guardrail etc.

5. Its independently external driver’s cab is equipped with interlock console for control all relevant mechanism, and it is characterized for capaciousness, coziness, safety, handiness, and a wide field of vision.

We have set up capabilities to output a series of products, mainly including: QTZ250(7030)，QTZ200(6526)，QTZ160(6516)，QTZ125(6018)，QTZ100(6013)，QTZ80A(6010)，QTZ80B(5613)， QTZ80(5214)，QTZ63A(5510)，QTZ63(5013)， We have very strong producivity, standing as a large crane manufacturer in China and the largest in Guangdong.