❏Low lifting speed because of low lifting height. High crane traveling speed fits the requirement of the long-track containers storage yards’ productivity. The spreader would go over the fourth/fifth container layer when the stack of containers is three/four layer and its lifting height depends on the requirements of storage yards.
❏The trolley traveling speed depends on the span and the outreaching distance of both sides of the bridge. In the case of the span and outreaching distance is short, smaller trolley traveling speed and the productivity is advisable; otherwise, the trolley traveling speed could be accordingly increased to meet productivity requirement.
❏When the span is over 40 meters, the crane mechanism travels in a high speed, and both sides of outriggers would deviate because of the drag on each side is different. So there is a stabilizer equipped on this crane and electric system would keep both sides of traveling mechanisms synchronous.
❏Electrical drive-control system adopts thyristor speed regulating drive AC or DC control system to meet the higher need and accomplish a better performance of speed regulating and control. Or it adopts conventional AC eddy current speed regulating control system and AC stator voltage and speed regulating drive control system.
❏An electric braking that equipped with thyristor speed regulating drive AC or DC control system or AC stator voltage and speed regulating drive control system is usually used as the electric control system of a high speed crane traveling mechanism. Conventional AC eddy current speed regulating drive control system which depends on the brakes to shut down traveling mechanisms should be avoided in order to prevent the huge impact to whole crane.
Loading and Unloading Operations:Railroad gantry cranes are primarily utilized for loading and unloading cargo onto and off of railroad cars. They handle diverse types of freight, including containers, bulk goods, heavy machinery, and other materials.
Intermodal Operations:These railroad gantry cranes facilitate the transfer of cargo between different modes of transport, such as loading or unloading containers from trains to trucks or ships, and vice versa. They play a crucial role in intermodal transportation by efficiently handling containerized freight.
Port Operations:In port facilities, heavy duty gantry cranes handle cargo from ships, placing containers or goods onto railcars for distribution via rail networks or transferring cargo from railcars to ships for export.
Rail Yard Operations:Heavy duty gantry cranes are integral in rail yards for marshaling and sorting freight, positioning railcars for loading, and managing the organization of cargo for efficient transportation.
Versatile Cargo Handling:Due to their large span and capacity, large gantry cranes can handle various types of cargo, ranging from heavy machinery to bulk commodities, providing flexibility in handling different materials and goods.
Efficient Material Handling:Large gantry cranes enable quick and efficient material handling operations, reducing loading/unloading times and enhancing overall logistical efficiency within railroad operations.
Maintenance and Repair:In some instances, railroad gantry cranes are also used for maintenance and repair work on railway tracks, bridges, or other infrastructure within rail yards, aiding in upkeep and ensuring operational safety.
Rail Yard Layout & Space
Assess the layout and available space in the railway yard to determine the required crane span. Ensure the crane can efficiently cover multiple tracks and storage areas while accounting for height restrictions or potential obstacles that may impact movement and operation.
Lifting Capacity
Identify the maximum cargo weight the crane will handle and choose a model with a lifting capacity that meets or exceeds the heaviest loads. Consider future cargo growth to ensure the crane remains capable of handling increasing demands over time.
Container Size & Stacking
Ensure the crane accommodates various container sizes (20ft, 40ft, and 45ft) commonly used in railway logistics. Determine the required stacking height to optimize storage while maximizing yard space efficiency.
Operational Efficiency
Evaluate the throughput requirements, productivity goals, and any specialized handling needs. Choose a crane that offers efficient lifting speeds, smooth trolley movement, and, if necessary, automation capabilities to enhance performance.
Safety Features
Prioritize operator and cargo safety by selecting a crane with anti-collision systems, load monitoring sensors, emergency stop mechanisms, and other advanced safety features to prevent accidents and ensure smooth operations.
Maintenance & Serviceability
Opt for a crane with accessible components, readily available spare parts, and reliable technical support to minimize downtime. Assess the crane’s reliability and maintenance needs to ensure long-term efficiency and cost-effectiveness.
Cost & Budget Considerations
Balance the initial investment with long-term operating costs, including energy efficiency, maintenance expenses, and potential future upgrades. Consider the crane’s lifespan and return on investment to make a cost-effective selection.