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The Rubber-Tyred Gantry Crane (hereinafter referred to as RTG) is a large-scale container yard loading and unloading equipment designed and manufactured based on international advanced design concepts, referencing FEM standards and industry specifications. This model strictly adheres to high-standard safety specifications and structural strength requirements, featuring excellent site mobility and highly efficient container stacking operation performance.。
1. The entire machine mainly consists of the metal gantry structure (main girder, portal legs, and bottom beams), lifting trolley, gantry traveling mechanism, and electrical control system.
Gantry Structure: As the main load-bearing and stress-bearing component, it is formed by connecting two box-girder main girders, variable cross-section box-girder portal legs, and bottom beams. The main material usually adopts high-strength low-alloy structural steel (such as Q235-B/Q345) to withstand heavy loads and wind loads in the complex operating environment of the yard.
2. The lifting trolley assembly comprises a lifting mechanism and a trolley traveling mechanism, operating on the rails above the main girder. The lifting mechanism features an independent drive system. The motor drives the drum through a reducer, controlling the vertical lifting of the dedicated telescopic spreader via a wire rope reeving system. Through precise control of the motor's speed and torque (with constant power control), it achieves accurate container positioning and multi-layer stacking within the yard.
3. Trolley Traveling: It typically adopts a rack-driven or wheel-driven configuration. When powered on, the brake releases, and the motor outputs power through a gearbox to drive the wheels or gears, enabling smooth back-and-forth travel along the main girder. When powered off, the brake engages, allowing the trolley to stop accurately.
4. Gantry Traveling Mechanism: It adopts a multi-motor individual drive configuration (usually composed of 4-wheel, 8-wheel, or 16-wheel large tubeless engineering tires), operating on the same principle as the trolley traveling mechanism. Through the synchronized action of multiple drive devices distributed at the bottom of the chassis, it drives the entire machine to travel freely within the yard and execute 90° right-angle steering, thereby enabling the RTG's flexible transfer and highly efficient handling operations between different container blocks.
Technical Parameters
Item | Parameter Range | Technical Remarks |
|---|---|---|
Rated Lifting Capacity | 40–100t | Rated capacity measured below spreader |
Span | 20–30m | Precise & safe operation: equipped with electronic anti-sway system, intelligent gantry deviation correction, and CMS intelligent service system (remote monitoring); optional trajectory optimization and automatic/semi-automatic control |
Lifting Height | 18–22m | Lifting height defined according to specific yard operating conditions |
Speed | Hoisting: 23m/min Trolley travel: 30m/min Gantry travel: 60m/min | Multiple power options: diesel, mains electricity, lithium battery hybrid and other solutions |
Working Class | A6–A8 |
Product Uses
1. Container Terminal Yards: Primarily deployed in the rear areas of major container terminals, they are specifically responsible for the rapid horizontal transfer, multi-layer stacking, and centralized dispatch operations prior to loading of containers after being unloaded from ocean-going mega-vessels.
2. Inland Railway and Highway Freight Stations: Suitable for railway container central stations and large-scale highway logistics hubs, they handle the efficient transfer and transshipment of containers at water-rail and road-rail intermodal nodes.
3. Large-Scale Comprehensive Logistics Parks: Certain customized Rubber-Tyred Gantry Cranes (RTGs) are applied in large inland bonded logistics centers or warehousing parks for the flexible handling and cargo distribution of heavy goods and special containers.
4. Shipyards and Heavy Industry Bases: Certain large-tonnage RTGs are also utilized in waterside shipyards, heavy machinery manufacturing plants, and petrochemical energy bases for the flexible lifting and relocation of large ship blocks, heavy equipment, and industrial containers.
Product Operate Guide
1. Pre-operation Checks: Before operation, please clear the tracks, check the tire pressure, and complete the power-on and no-load test runs.
2. Gantry Traveling Precautions: Before the gantry travels, ensure the spreader is raised to a safe height and sound the warning horn.
3. Operational Prohibitions: Overloading and diagonal pulling are strictly prohibited. Relying on limit switches to stop the machine is strictly forbidden.
4. Operational Focus: Maintain full concentration during operations. Keep your eyes on the spreader to ensure smooth and accurate container landing.
5. Emergency & Post-operation Procedures: Stop the machine immediately if any abnormalities occur. After operations, park the equipment in the designated position, cut off the power supply, and properly secure the windproof anchoring.
Product Video
FAQ
1. What causes the RTG to deviate from its path or experience body twisting/swaying when traveling in the yard?
Answer: This is usually caused by uneven tire pressure, excessive wheel load deviation, or uneven yard ground conditions. It is recommended to stop the machine immediately, check the tire pressure of each tire, and adjust it to the standard value. If the issue persists, professional maintenance personnel should be contacted to measure and adjust the wheel parallelism, and to improve the yard ground conditions.
2. What should be done if the RTG lifting mechanism experiences load slipping (brake slipping)?
Answer: Load slipping is mostly caused by severe brake wear, oil contamination on the brake wheel surface, or insufficient main spring tension. Please inspect and clean the brake wheel and brake shoe linings, and tighten the main spring nut to increase the braking torque. If the brake frame or pins are severely worn, the relevant parts should be replaced promptly.
3. How to troubleshoot if the entire machine lacks power or the controls are unresponsive?
Answer: Such issues mostly occur in the hydraulic system or the electrical control system. First, check whether the hydraulic system has insufficient pressure due to leakage, or whether the pressure relief valves and solenoid valves are clogged or damaged. Next, use a multimeter to check the electrical circuits and contactor contacts. After identifying the source of the fault, promptly replace the seals, clean the valve spools, or repair the electrical components.
4. How should RTGs be protected against the wind in severe weather?
Answer: The windproof anchoring procedure must be strictly followed. After stopping operations, move the RTG to the designated anchoring position and deploy the rail clamps or windproof iron wedges. In the event of strong winds or typhoons, steel wire ropes must also be used for auxiliary reinforcement, and the main power supply must be cut off to ensure the absolute safety of the equipment in the yard.
5. Which parts of the RTG require key inspection during daily maintenance?
Answer: Key focus areas include the wear and tire pressure of the tires, the broken wires and lubrication status of the wire ropes, and the clearance and wear of the brakes. Additionally, it is necessary to regularly clean the hydraulic system oil filters, check the lubrication condition of all hinge points and bearings, and confirm that the insulation and grounding resistance of the electrical equipment comply with safety standards.
