The dam top floodgate gantry crane is specially engineered for hydraulic engineering applications. It is mainly used for the transportation, installation and routine maintenance of hydropower station equipment, including floodgates, trash racks and other water conservancy facility components. With excellent lifting capacity and reliable operation performance, it provides an efficient solution for dam maintenance and hydraulic structure management.
The MQ series gantry crane is available in both unidirectional and bidirectional travelling configurations. The unidirectional model adopts a fixed hoist installed on the gantry frame and travels along dam rails, providing linear working coverage for floodgates arranged in a single row. The bidirectional model is equipped with a cross travelling trolley that moves perpendicular to the crane travelling direction, enabling flexible lifting operations for upstream and downstream floodgates and trash racks across multiple rows.
Robust main girder and hoisting structure
Adopts steel plate or box-type main girder structures, combined with electric drive motors and gear reduction hoisting units, providing stable load handling performance and reliable operation under heavy-duty conditions.
Safe travelling system with enclosed operator cabin
The travelling mechanism adopts motor-driven operation. An enclosed operating cabin is installed on the gantry frame, providing operators with a safer and more comfortable working environment during dam operations.
Wind-resistant and stable outdoor operation design
Each gantry leg is equipped with end buffers and wind-resistant rail clamping devices, improving equipment stability and safety during outdoor hydraulic engineering operations.
Flexible dedicated gate lifting mechanism
The dedicated spreader moves vertically along gate slots or rotates around gate hinges, adapting to different floodgate opening and closing mechanisms.
Reliable gate operation under water flow conditions
Gate operation under flowing water conditions comprehensively considers actual load weight and hydrodynamic pressure, ensuring balanced, safe and reliable opening and closing performance.
Synchronous dual lifting point control
Large-span gate handling adopts a dual lifting point design with synchronous control technology, maintaining balanced force distribution and improving overall operational stability.
Heavy-load capability with optimized operating speed
The equipment features heavy-load capacity and low working speed, with general operating speeds below 4 m/min. Certain quick gate models support higher speeds of 10–14 m/min to satisfy rapid operation requirements.
Structural Classification of Dam Hoisting Equipment
Fixed Winch Hoist
Includes winding, rack, chain, screw and hydraulic structural types, mainly used for fixed-position gate lifting applications.
Mobile Winch Hoist
Covers gantry, semi-gantry, overhead bridge and trolley-style configurations, providing flexible solutions for different dam and hydraulic engineering layouts.
Weihua Crane provides fully customized floodgate gantry hoist solutions designed for hydraulic engineering projects, reservoirs and dam operation facilities. Developed for floodgate opening, closing and maintenance applications, the equipment delivers reliable lifting capacity, precise handling performance and long-term stable operation, supporting efficient water conservancy management.
Core technical parameters including lifting capacity, working span, lifting height and rail gauge can be flexibly customized according to different dam site layouts and floodgate hoisting requirements. The optimized design ensures safe, stable and efficient operation under complex hydraulic engineering conditions.
Optional Configurations
Electric and hybrid trolley drive systems
Automatic control and remote intelligent operation systems
Professional anti-sway and high-precision positioning devices for accurate floodgate handling
Energy-saving drive units equipped with regenerative braking function
Tailored structural design to adapt to exclusive dam and reservoir rail layouts
With professional engineering expertise, Weihua Crane ensures high operational efficiency, enhanced safety and long service reliability, delivering advanced lifting solutions for modern hydraulic construction, reservoir management and dam floodgate operation projects.
| Lifting capacity | KN | 630 | |
| Span | m | 4.5 | |
| Lifting height | m | 28（under rail 21m） | |
| Work classifications | Q3（middle class） | ||
| Speed | Main lifting | m/min | 1.57 |
| travelling | 19.4 | ||
| Total power | KW | 64 | |
| Crane rail recommended | QU80 | ||
| Max. wheel loading | KN | 577 | |
| Power | Three-phase AC 50Hz 380V | ||
