Compared with the tower cap tower crane, the flat head tower crane appears later. Compared with the horizontal arm trolley luffing tower crane with tower head and tie rod, the force condition and connection mode of the flat head tower crane arm are obviously different. After the tower is erected, the stress state of the upper and lower main chords of the flat head tower crane and the balance arm remains unchanged, the upper chord is mainly tensioned, and the lower chord is mainly subjected to tension The mechanical model is simple and concise.
hengsheng flat-top tower crane，It has 20 years of experience in the production and manufacturing of construction elevator. The product has passed the ISO9001 international quality system certification, and has independent R & D, design and generation departments. Choose Hengsheng construction elevator, will become the best construction machine you want to have.
The most significant structural feature of flat head tower crane is that it has no tower head and tie rod, which is the origin of its name. Because of this special structure, there is a qualitative difference between flat head tower and tower crane with tower head, which also determines the unique advantages and disadvantages of flat head tower.
Jinan Hengsheng Construction Machinery Co., Ltd. is mainly engaged in tower crane, tower crane, construction elevator and construction hoist. It is a designated manufacturer of construction machinery recognized by the State Bureau of technical supervision, a member of China Construction Machinery Association, a member of China Construction Machinery Testing Technology Working Committee, and a director unit of Shandong Construction Machinery Association. ISO9001:2015 international quality system certification, CE, GOST certification enterprises.
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Most of the modern jib tower cranes adopt the space truss structure with regular triangle section, which is mainly considered in this stress condition. The upper chord is connected by a pin shaft to bear the tension, while the lower chord is subjected to pressure by the end face of the joint. Thus, the connection mode of the lower chord is very simple. Only two positioning locking pins and locking bolts are used. During installation, the upper pin shaft is connected, and then the arm section is lowered. The two locking pins are automatically in place, and the bolts can be put on. The arm joints are mainly connected by a large pin shaft of the upper chord, which saves both labor and time, which is one of the characteristics of flat head tower crane.