The QDX double girder bridge crane is a set of crane structure designed to adapt to the development of the industry by adopting the serialization, standardization and modularization design theory, using modern computer aided design and introducing advanced technology.
In full consideration of comprehensive benefits, the height of the crane shall be reduced as much as possible, the structure shall be simplified, the dead weight and wheel pressure shall be reduced, the height of the whole building shall be reduced, the building structure shall be light, and the use cost of the crane shall be reduced.
The improvement of electric drive and control shall be fully considered in the design of crane. Combining automation technology with mechanical transmission technology, advanced microelectronics technology, power electronics technology and fuzzy control technology are applied to the mechanical drive and control system to achieve automation and semi-automatic.
Optimize the crane mechanism, beautify the product appearance, simplify the mechanism, and improve the processing and manufacturing conditions. The crane product structure is novel, the layout is reasonable, the mechanism transmission efficiency is high, stable and durable, the product is easy to process, and the production efficiency is improved.
QDX double girder bridge crane is an efficient lifting equipment widely used in various industrial environments, especially for handling heavy and large materials. It is commonly used in steel plants, machinery manufacturing plants, warehouses, logistics centers, and other places that require high load capacity and large spans. With its excellent lifting capacity and flexible operating performance, the double beam overhead crane can effectively improve work efficiency and reduce manual handling costs.
1. Industry Position
Founded in 2006, Dafang Heavy Machinery covers an area of 1,580 acres and employs over 2,600 people. With an annual sales revenue of 3.566 billion RMB, the company focuses on two main business sectors: lifting machinery and steel structures. Major products include single and double girder bridge and gantry cranes, electric hoists, steel structure bridges, prefabricated buildings, and industrial plants. Dafang serves critical sectors such as military industry, aerospace, nuclear power, offshore engineering, metallurgy, and mining. Its products are exported to over 100 countries and regions, including the United States, Russia, and Southeast Asia.
Annually, Dafang manufactures 30,000 single-girder cranes, more than 12,000 double-girder and gantry cranes, and 30,000 electric hoists. Based on production scale, sales volume, and brand recognition, the company ranks among the top three in China’s crane industry.
2. Core Technologies
Dafang’s R&D team consists of over 260 members, including 104 with senior or intermediate engineering qualifications. The company invests 3.8% of its annual sales into technology development. It has obtained 12 international invention patents, 50 national invention patents, 415 utility model patents, and achieved 43 scientific and technological milestones. Dafang was the first in the industry to adopt anti-sway and automatic positioning technologies.
In 2016, Dafang became the first enterprise in Henan Province to implement smart crane applications and to introduce remote monitoring technology. The company also developed the multifunctional brewing crane, filling a domestic market gap. In 2021, Dafang was the first in the industry to be certified for unmanned intelligent cranes. In 2022, it undertook a project for a tower crane at a commercial satellite launch site.
3. Manufacturing Capability
Dafang Heavy Machinery is equipped with advanced in-house designed manufacturing equipment, including 1,500-ton press grooving machines, extrusion machines, and roller machines. The company has established leading domestic workshops, including an electrical assembly line, steel pre-processing line, paint finishing line, and China’s first practical single-girder lean production line. Precision machinery includes imported German NILES CNC gear grinding machines and Japanese MAZAK machining centers.
Dafang strictly follows refined manufacturing processes, adhering to the principle of “doing it right the first time, zero defects.” This commitment to quality is deeply ingrained in every employee, ensuring that every product delivered meets the highest standards.
4. Service Assurance
Dafang upholds a “comprehensive, high-quality” service standard, providing users with fast, attentive, and thorough one-stop services. With 24/7 online support, choosing Dafang means complete peace of mind. Just tell us what you need—we’ll take care of the rest.
The load capacity of the double beam overhead crane can be customized according to customer needs. Typically, its load capacity ranges from a few tons to several hundred tons, meeting the requirements of various industrial applications.
The double beam overhead crane is widely used in heavy material handling, construction, warehousing, and logistics. It is particularly suitable for places that require high lifting capacity, large spans, and high-frequency operations.
The maintenance cost of the double beam overhead crane is relatively low. The key lies in regular inspections and maintenance. With a proper maintenance plan, the service life of the equipment can be significantly extended, and the failure rate can be reduced.
Our double beam overhead crane is equipped with various safety protection devices, including overload protection, limit switches, emergency stop buttons, and alarm systems, ensuring safety during operation.
