The QD series double girder overhead crane for heavy-duty industry is a high-capacity material handling solution engineered for demanding industrial lifting applications. Comprising a robust box girder frame, crane traveling device, and a winch trolley with advanced lifting and moving mechanisms, this crane double girder ensures efficient longitudinal movement along workshop tracks and precise lateral trolley motion. Additionally, the moving table is positioned outside the two main beams, with one side dedicated to crane maintenance and the other for the trolley conductor system. With a lifting capacity of 5 to 320 tons, a lifting height of 6 to 30 meters, and a work duty of A5, it delivers exceptional performance for heavy-duty crane operations. Certified with ISO and CE standards, the QD crane guarantees quality and compliance for global industrial use. DONGQI provides customizable QD double girder cranes tailored to specific industrial needs, ensuring optimal functionality for heavy-duty lifting solutions.
Applications of QD Double Girder Crane
The QD series crane double girder excels in various heavy-duty industrial sectors, including:
Machinery Fabrication: Efficient handling of large machinery components for industrial crane operations.
Metallurgical Workshops: Reliable lifting for metal processing and casting in metallurgical crane applications.
Storage and Stock Grounds: Streamlined material handling for large inventories in warehouse lifting systems.
Power Stations: Safe transport of heavy equipment and transformers for power plant lifting solutions.
Textile and Food Industries: Versatile double beam crane for general material handling tasks.
Note: This crane is not suitable for inflammable, explosive, or corrosive environments. Contact DONGQI for specialized heavy-duty crane solutions compliant with safety standards.
Advantages of QD Double Girder Overhead Crane
The QD double girder crane offers several key benefits:
High-Capacity Performance: Supports up to 320 tons for demanding industrial lifting tasks.
Environmental Adaptability: Suitable for high-temperature, dust, or humid conditions in heavy-duty crane operations.
Long Lifespan: Designed for 30–50 years of reliable double girder crane performance.
Easy Installation and Maintenance: Simplifies setup and reduces downtime for industrial material handling.
Frequency Inverter Control: Provides smooth and accurate speed adjustments for material lifting.
Flexible Control Options: Supports cabin, pendant, or wireless remote control for safe crane operation.
Customizable Attachments: Equipped with magnets, grabs, or C hooks for specific cargo types in heavy-duty lifting solutions.
Main Components of QD Double Girder Crane
Main Girder
Structure: Box-type girder with CNC cutting for high flatness, using standard 24#, 38#, or 43# rails for cross travel.
Material: High-strength steel plates for durable crane double girder construction.
End Carriages
Design: Welded rectangular steel tubes with buffers for safe industrial crane travel.
Assembly: Bolted to the main girder for quick and efficient setup.
Winch Trolley
Components: Includes motor, brake, reducer, trolley frame, hook, and pulley for stable and precise operation.
Functionality: Moves along the main beam track for efficient material handling in double beam cranes.
Drive Mechanism
Motor: High-quality motor (top Chinese brands) for reliable heavy-duty crane performance.
Reducer and Brake: Integrated for efficient and maintenance-free operation.
Electrical System
Schneider Electrics: Original French components for reliable crane electronics.
Protection: Voltage and current protection for consistent industrial lifting performance.
Safety Features of QD Double Girder Crane
The QD double girder overhead crane is equipped with advanced crane safety systems, including:
Polyurethane Buffer: Absorbs collision energy to enhance crane durability.
Limit Switches: Prevent overlifting, over-lowering, or excessive trolley travel.
Overload Limiter: Triggers alerts to prevent unsafe lifting conditions.
Voltage and Current Protection: Ensures reliable electrical system performance.
Emergency Stop: Allows immediate shutdown for safe heavy-duty crane operations.
QD vs. LH Double Girder Crane Comparison
The QD and LH double girder cranes differ in key aspects:
Lifting Capacity: QD cranes support up to 320 tons for heavy-duty lifting, while LH cranes handle up to 32 tons (rarely 320 tons) for simpler tasks.
Hoisting Mechanism: QD uses a winch trolley for precise and efficient lifting, while LH uses a hoist trolley with lower control precision.
Operating Environment: QD is designed for harsh conditions (high temperature, dust, humidity), while LH is unsuitable for extreme environments.
Cost: QD cranes are more expensive due to advanced design, while LH cranes are cost-effective for less demanding applications.
Why Choose QD Double Girder Overhead Crane?
The QD series double girder overhead crane for heavy-duty industry, offered by DONGQI, delivers unmatched efficiency, durability, and versatility for industrial lifting applications. Certified with ISO and CE standards, its high-capacity design, robust construction, and advanced safety features ensure compliance with global quality requirements and long-term performance. Ideal for machinery fabrication, metallurgical workshops, and power stations, this crane double girder guarantees stable operation and cost-effective material handling.
For more information or to request a customized solution, contact DONGQI today.
Frequently Asked Questions About QD Double Girder Overhead Crane
What is the QD double girder crane
for heavy-duty industry?
The QD series double girder overhead crane, also known as a crane double girder or industrial bridge crane, is a high-capacity lifting solution designed for heavy-duty material handling. Featuring a box girder frame and winch trolley, it ensures precise and efficient lifting in industries like machinery fabrication, metallurgical workshops, and power stations.
What are the main applications of the QD double girder crane?
The QD series crane double girder is widely used in:
Machinery Fabrication: Efficient handling of large components for industrial crane operations.
Metallurgical Workshops: Reliable lifting for metal processing in metallurgical crane applications.
Storage and Stock Grounds: Streamlined inventory management in warehouse lifting systems.
Power Stations: Safe transport of heavy equipment for power plant lifting solutions.
Textile and Food Industries: Versatile double beam crane for general material handling.
What is the lifting capacity and height of the QD crane?
The QD double girder crane supports a lifting capacity of 5 to 320 tons, ideal for heavy-duty material handling. Its lifting height ranges from 6 to 30 meters, suitable for high-capacity industrial lifting applications.
What safety features are included in the QD double girder crane?
Key safety features include:
Polyurethane Buffers: Absorb collision energy for enhanced crane durability.
Limit Switches: Prevent overlifting or over-lowering for safe load handling.
Overload Limiter: Triggers alerts to ensure secure material handling.
Voltage and Current Protection: Maintains reliable electrical performance.
Emergency Stop: Allows immediate shutdown for safe heavy-duty crane operations.
Can the QD crane operate in hazardous environments?
The standard QD double girder crane is not suitable for inflammable, explosive, or corrosive environments. DONGQI offers customized heavy-duty crane solutions compliant with safety standards for such conditions.
What control modes are available for the QD crane?
The crane supports flexible operation through:
Cabin Control: For enhanced precision in large-scale industrial lifting systems.
Pendant Control: For direct, hands-on operation.
Wireless Remote Control: For convenient and safe crane handling.
How often should the QD crane be maintained?
Regular maintenance ensures reliable performance:
Conduct no-load tests on wire ropes, hooks, and electrical systems before use.
Lubricate components and replace worn parts promptly.
Inspect motors and electrical systems regularly for smooth double girder crane operations.
What is the warranty period for DONGQI’s QD double girder crane?
DONGQI provides a warranty of 1–3 years.
Can the QD crane be customized?
Yes, DONGQI offers fully customizable crane double girder solutions. You can adjust lifting capacity, span, lifting height, control modes, and attachments (e.g., magnets, grabs, C hooks) to meet specific heavy-duty material handling needs.
What is the difference between QD and LH double girder cranes?
Lifting Capacity: QD cranes support up to 320 tons, while LH cranes handle up to 32 tons (rarely 320 tons).
Hoisting Mechanism: QD uses a winch trolley for precise lifting, while LH uses a hoist trolley with lower precision.
Operating Environment: QD is suitable for harsh conditions (high temperature, dust), while LH is not.
Cost: QD cranes are more expensive due to advanced design, while LH cranes are cost-effective for simpler tasks.
