The QY Insulated Overhead Crane is a type of lifting equipment designed for specific industrial applications. It is primarily used in the smelting workshops of non-ferrous metals such as aluminum, magnesium, lead, and zinc electrolysis. During operation, the insulation device effectively prevents the current from being conducted from the suspended charged components to the crane body, ensuring operational safety. The crane's critical parts use high-performance insulating materials such as Glass Fiber Reinforced Plastic (GFRP). Additionally, one or more layers of insulating paint are applied to the metal structure's surface to form an insulation protection layer.
In aluminum electrolysis workshops, where temperatures are typically high, the insulated overhead crane safely handles anodes, cathodes, and semi-finished aluminum materials under high temperature and high humidity conditions.
The insulated overhead crane is suitable for the smelting processes of non-ferrous metals such as magnesium, lead, and zinc. These environments are harsh, with corrosive gases (e.g., sulfuric acid), toxic and harmful gases (e.g., hydrogen fluoride), as well as high currents and strong magnetic fields.
In processes such as aluminum ingot casting, extrusion, and rolling, the crane moves raw materials, intermediate products, and finished products.
In specific power facilities, such as substations or power plants, the insulated overhead crane can perform maintenance and repair tasks. Particularly for high-voltage electrical equipment, insulation prevents current from being conducted through the suspended components to the crane, thus avoiding potential hazards.
Specifically designed for material handling tasks in environments with high currents or strong magnetic fields. It uses multi-stage insulation technology (typically three levels of insulation) to effectively prevent the transmission of electrical current to operators or other parts of the equipment.
Made with special materials and coatings that provide excellent corrosion resistance, enabling long-term stable operation regardless of harsh environmental conditions. This enhances the equipment's lifespan and reduces maintenance costs.
The crane features advanced control systems, including variable frequency speed control, precise positioning, and other functionalities that ensure smooth and accurate operation. Additionally, its design fully considers work efficiency, with features such as fast lifting speeds and efficient braking systems, which can significantly boost production efficiency. Some high-end models may also integrate intelligent diagnostic systems, allowing users to monitor equipment status in real-time and receive early warnings of potential faults, ensuring continuous and stable production.
This is the specification table for a 20ton lifting capacity crane. We also offer customized cranes with different lifting capacities. Feel free to contact us for more information!
| apacity | Main | ton | 20 | |||||||||||||||
| Aux. | 5 | |||||||||||||||||
| Span | meter | 10.5 | 13.5 | 16.5 | 19.5 | 22.5 | 25.5 | 28.5 | 31.5 | 10.5 | 13.5 | 16.5 | 19.5 | 22.5 | 25.5 | 28.5 | 31.5 | |
Lifting Height | Main | 12 | 12 | |||||||||||||||
| Aux. | 14 | 14 | ||||||||||||||||
| Work Duty | A5 | A6 | ||||||||||||||||
Speed | Main | m/min | 7.2 | 9.7 | ||||||||||||||
| Aux. | 12.7 | |||||||||||||||||
| Trolley traveling | 44.6 | |||||||||||||||||
| Crane traveling | 84.7 | 112.5 | 87.6 | 101.4 | ||||||||||||||
| Max.wheel loading | kN | 162 | 169 | 178 | 191 | 199 | 211 | 222 | 231 | 167 | 174 | 183 | 197 | 205 | 218 | 229 | 238 | |
| Power supply | 3-Phase A.C. 50HZ 380V | |||||||||||||||||
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 QY Insulated Bridge Crane adopts multi-level insulation technology, typically triple insulation, to effectively prevent current from transferring to the crane body from electrified parts, ensuring the safety of operators and equipment. Key components such as the main beams, end beams, and electrical control systems use high-performance insulating materials to withstand high current, humidity, and temperature conditions.
The QY Insulated Bridge Crane is especially suited for environments such as smelting workshops, substations, and power plants, where there are challenges like strong currents, magnetic fields, and corrosive gases. The crane is made with corrosion-resistant materials and coatings, allowing it to operate stably for long periods without being affected by harsh conditions, ensuring safety and efficiency in the production process.
The QY Insulated Bridge Crane is designed for long-term stable operation and low maintenance costs. It uses highly corrosion-resistant materials, reducing wear and tear in harsh environments. Additionally, our equipment is equipped with an intelligent diagnostic system that monitors the condition of the crane in real time, identifying potential issues and effectively reducing maintenance costs while extending the crane's service life.
The QY Insulated Bridge Crane uses advanced control systems, including variable frequency speed regulation and precise positioning features, ensuring smooth and accurate operation. Additionally, the crane is equipped with fast lifting and efficient braking systems to enhance work efficiency and meet the high-intensity tasks in complex working environments.
