DAHA Tower Crane QTZ6515

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Dahan group, established in 2000, is specialized in Tower Crane Hoist and Building Hoist. And registered capital reaches 100 million RMB. Dahan group has their own research and development department as well as production, marketing, service and financial department. The production capacity can be over 10000 sets and have earned the reputation as a leading manufacturer of tower crane and construction hoist.

Located in Jinan high and new technology industrial zone, office area is 3000square meters. Production base is in Jinan, Guangdong, Hunan. Total area  reaches 300000 square meters.

High-quality technological management team and first-rate production and detection equipment lay good foundation for the steady development of the company. Its technology and management personnel, including many senior engineers, have college degree or above, and skilled workers mostly have vocational school degree or above. The company also has over 200 general and special production equipment and over 300 measuring instruments for detection. The company passed the certification of ISO9001 Quality Management System in 2002, providing reliable guarantee for the management system and product quality.  

Our Dahan concern requirements of modern city construction and strive to provide products with advanced technology and rational price, furnish good technical support and pre and after-sales service for customers. We hope to create beautiful future with customers.

Corporate Vision

Vision:Become an ever-green construction machinery enterprise and maximally meet customers’ requirements
Core Values  
Quality: High quality, innovation, safety and reliability.
              High quality is the basis of the enterprise.
              Innovation is the soul of the enterprise.
              Safety is reverence to life.
              Reliability wins the trust.
Service: Customer focused, customers are existence value of Dahan people, do what we have promised.
Responsibility: Attentive and responsible, brave to undertake and fully perform individual, company and social responsibility.
Spirit
Hard Work:Industry, simplicity, perseverance and hardships are the source power of Dahan to achieve transnormal and leapfrog development.
Struggle:Concentrated reflection of brave advance, assiduous seeking, brave challenge and enthusiasm and progress of Dahan people.
Pioneering & Progress::Promote traditions, keep pace with the times, have the courage to innovate and pursue excellence in work

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Q:National standards for tower cranes
Tower crane GB/T5031 - 2008 has been implemented since February 1, 2009. In accordance with the new standards promulgated, chief editor -- China Academy of Building Research Institute of building mechanization of Langfang, Beijing and Hebei respectively in Hangzhou, Nanning held the new standards xuanguan. Luo Wenlong, director of the standard editor and vice president of Li Shoulin, explained the new standards comprehensively. The new standards are quite different from the previous standards, adding a lot of security related content, mainly embodied in the following 3 aspects: 1) the principle of different. Previously considered issues mainly consider the domestic tower crane industry technology status, appropriately reflect the advanced nature, and now is the requirements and international benchmarking, consider safety. 2) different forms of organization. The standard used in scientific research institutes, universities, factory assistant; the preparation unit including Research Institute, and the host plant, supporting enterprises, universities, inspection unit, there are relatively large units on behalf of (rental business), etc..
Q:What are the main technical parameters of a tower crane?
Generally speaking, the main parameters of the tower crane are:Maximum amplitude unit MMaximum lifting height, unit MMaximum lifting torque unit KN.mMaximum lifting speed unit m/minMaximum lifting unit tRotational speed unit r/minVariable speed unit m/min or o/minWalking speed per unit m/minMotor power unit w......Please refer to the product manual.
Q:What are the characteristics of a tower crane?
Four, according to the different installation methods of cranes, can be divided into folding transport, self erection of the rapid erection of tower cranes and the need to use the auxiliary machine assembly and disassembly of tower cranes.Can set up their own fast loading crane are small and medium slewing tower crane, mainly used for short duration, low buildings move frequently, the main advantage is to improve work efficiency, save installation cost, save time and labor and material, disadvantage is the complicated structure, large amount of maintenance.A tower crane that needs to be disassembled and assembled by an auxiliary machine is mainly used in middle and high rise buildings, with large working range and large lifting capacity. It is the main type of construction site at present.Five, according to whether the spire structure, can be divided into flat head tower crane and tower tower crane.Tower crane is a new type of tower crane is developed in recent years, its characteristic is the tower cap and the rod part before and after the cancellation in the structure of the original tower crane on the enhanced structural strength of the arm and balance arm, arm and balance arm is directly connected, the utility model has the advantages of:1 、 the whole machine is small in size, easy to install and safe, reduce transportation and storage costs;2, the boom of tolerance and good performance, uniform stress, small damage on the structure and connection part;3, component design can be standardized, modular and interchangeable, reduce equipment idle, improve investment efficiency.It is in the same type of tower crane tower crane head Zhongping slightly higher prices.
Q:What parameters are lifting machines called large equipment? 200
General purpose gantry cranes: MG, 440t, MG, 360t, MG, 450t, Me, 360t, ME, 900tGeneral purpose bridge crane: QD, 350t, QD, 400t, QD, 450t, QD, 390t, QD, 330t, QE, 350t, QE, 330tThe above tonnage is now recognized as a large lifting machinery.Hoisting machinery refers to the lifting of heavy objects with hooks or other lifting devices, and mechanical operations such as lifting and moving in space. There are many classifications of cranes, such as cranes, cranes, cranes, cars and so on. They are commonly referred to as one or more kinds of cranes.
Q:How do tower cranes rise?
The weight and concrete foundation shall be made in advance and marked, and the ground ground endurance shall be no less than 20T per square meter. The chassis and standard sections are then assembled on this basis. The standard section of tower crane is the main part of the main part of tower crane. It is also the main role of heightening the height of tower crane". In the construction process, tower crane accompanied by the rise of buildings, naturally need to heighten. When the tower is hoisted, the upper frame is raised upwards with the jack up, so that there is a space between the tower body and the frame, and the standard section of the tower body is installed in the space. In this way, the purpose of the tower crane is realized.
Q:Which kind is better, gantry crane or tower crane?
Each has advantages, the use of different conditions, the use of different cranes, tower cranes can not move, but the lifting height can be very high, the door machine has tracks can be vertical and horizontal movements, lifting height, tower crane is not high.
Q:How to build a tower crane?
4, combination and installation with the boom, hung with arm pull rod.5, the assembly and installation of crane. This boom just installed in the rotary device, the other end is able to lift and hang rod, in accordance with the installation instructions.The power supply auxiliary hoist with 6, switch on the tower cap following installation, the installation of counterweight boom hoist with the.
Q:Lifting tower crane tower more than 45 meters, the demolition cost and how to adjust the field Sinotrans transportation fees?
Self lifting tower crane tower 45 meters high to prevail, such as height of over 45 meters, each increased to 10 meters (less than 5 meters, excluding) demolition costs increase 20%, off-site transportation costs increased by 10%.
Q:What are the safety devices for the horizontal arm self lifting tower cranes?
(6) the crane of lightning protection and anti electromagnetic wave sensing device shall be equipped with lightning protection device and anti electromagnetic drape induction measures according to the actual situation and shall be equipped with crane with a hinge height of more than 50m at the root of the boom. (7) the tower crane should be installed to prevent the rotary overload limit torque coupling (8) anti off rope device to prevent the wire rope from the working position (9) rope breaking resistant device to prevent car luffing rope break free sliding trolley (10) anti broken shaft device to prevent car car wheel shaft broken after the fall (11) brake parts that is the work device is a safety device
Q:What is the difference between a tower crane and a jack up tower crane?
Tower cranes, because there is no running mechanism, so tower crane can not do any movement. Fixed tower crane can be divided into the tower height invariant and Jack up. That is, the jack up tower crane is a kind of fixed tower crane.

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