The QD general-purpose double-girder bridge crane is a GB‑standard classic heavy‑duty overhead crane. It adopts a double-box main beam integral welding structure. It has mature technology, wide load-bearing range, and extremely stable operation. It is the mainstream standard equipment for large-tonnage, high-frequency, and heavy-load lifting scenarios in industrial plants. The whole machine is equipped with a standard lifting trolley lifting mechanism. The overall structure is sufficiently rigid, resistant to deformation and fatigue, and is suitable for installation and use in various standard heavy industrial plants. The equipment has a large operation coverage, strong load-bearing capacity and high safety factor. It can be used for continuous high-intensity hoisting operations for a long time. It is suitable for various heavy-duty industrial working conditions such as machinery manufacturing, heavy industry assembly, warehousing and transportation, and equipment maintenance. It is extremely versatile and practical.

Core advantages

With its solid structural design and mature manufacturing technology, the QD double-girder bridge crane has become a classic main model for heavy industrial hoisting. It has significant comprehensive advantages: the whole machine is made of high-quality steel and is welded in one piece. The double-box main girder structure has excellent bending and torsion resistance. It has no shaking or deformation during heavy-load operation, and is fatigue-resistant. It can be stably adapted to 24-hour continuous high-frequency heavy-load operations for a long time. The equipment has a long service life and an extremely low failure rate. The overall carrying tonnage covers a wide range and the adaptation span is large. It is suitable for various types of heavy material hoisting, large equipment assembly, and heavy-load transfer conditions. Its versatility far exceeds that of ordinary light‑duty cranes; the operating mechanism adopts an independent drive design with sufficient power, accurate braking, and stable movement, it can effectively avoid problems such as deviation, slipping, impact and shaking, and has high operational stability and alignment accuracy; the core components are highly standardized, universal accessories, and have a large market share. Later inspection and maintenance are convenient and operation and maintenance costs are controllable; the safety protection system is complete. It comes fully equipped with safety devices including overload limiter, upper & lower stroke limits, buffering and anti-collision, emergency stop, phase loss and voltage loss protection, etc., to comprehensively avoid the risks of heavy-load operations; it supports multiple operating modes such as ground operation, wireless remote control, and cab control. The frequency conversion speed regulation, intelligent monitoring, and precise alignment system can be upgraded as needed to adapt to various complex heavy-load operating conditions.

Technical parameters