Recently，The main tower of Tianhekou Highway Bridge in Yunxi County was successfully capped.，During the construction of the bridge tower，Produced by Fangyuan GroupQTZ250(TC7030)Tower crane is the main lifting construction equipment.，Play“The main force”Action。

QTZ250（TC7030）Tower crane is a cap-type tower crane independently developed by Fangyuan Group.，The maximum lifting capacity of this model is 16t、Maximum operating range 70m、Maximum attachment height up to 250m，Because of its maximum lifting capacity.、With the characteristics of high lifting height and light weight, it has become a special machine for the construction of large bridge towers.，Hanjiang Highway Bridge in Danjiangkou、Shandong Yellow River Highway Bridge、Jianghan Fourth Bridge Widening Project、Baiyang Yangtze River Highway Bridge and other large bridge projects.。

Lifting of this model、Turn around、The three luffing mechanisms are all controlled by variable frequency speed regulation.，The lifting mechanism is controlled by a closed-loop composed of a variable frequency motor with an encoder.，It has the function of slow positioning and zero servo anti-falling.；Rotating mechanism adopts frequency converter to control torque motor.，Slewing speed is stable and sensitive，It has the function of anti-swing。The standard section of the tower body is a plate structure connected by a pin shaft.，Provide inclined ladders；Meet the needs of various boom length changes of the crane boom，The balance arm is designed as a multi-section combined structure.，Convenient selection of different working conditions；The octagonal structure of that low turntable meets the stress requirement of various angle，Symmetrical arrangement of double slewing mechanism，And is mesh with that external teeth of the slewing bear.；Jacking cylinder large bore reducing system pressure，Safer jacking process，So as to meet the hoisting requirements of various large bridge towers.。

This product has been awarded successively“Haiyang Excellent New Product First Prize”“The Second Prize of Excellent New Products of Enterprise Technological Innovation in Shandong Province”“Celebrating the 70th Anniversary of the Founding of the People's Republic of China, Outstanding New Products in Construction Machinery Industry”And many other honors.。