Hydraulic Gantry Crane

What Is Hydraulic Gantry Crane?

Structure and Working Principle

• Gantry Frame Structure: The main load-bearing part of the hydraulic gantry crane with a box beam or truss structure. It has high rigidity and strength for lifting loads. The main beam spans between the legs, providing a running track for the trolley, and the legs support the equipment and ensure stability. Legs can be A-type, U-type, or truss-type, and some models allow lateral adjustment to fit different working widths.
• Hydraulic System: The power core of the hydraulic lifting crane. An electric motor or internal combustion engine drives the hydraulic pump to convert mechanical energy to hydraulic energy. The hydraulic oil is transported to control components via high-pressure oil pipes. These control components regulate the hydraulic oil flow and direction, driving hydraulic cylinders to move for lifting and lowering. Components like relief valves, balance valves, and hydraulic locks ensure stable system pressure, prevent falls, and enable precise movement control for safe operation.
• Lifting Trolley: The core of lifting mechanism, installed on the main beam track. It integrates a hydraulic lifting mechanism, moving longitudinally. The hydraulic motor drives the drum, enabling rope winding and unwinding for hook movement. Some hydraulic gantry cranes have lateral or slight luffing capabilities to expand the working range.
• Traveling Mechanism: The core of crane movement, at the bottom of the gantry legs. It generally uses a hydraulic motor to drive wheels (or tracks, in special working conditions) for longitudinal or lateral movement, enhancing the working coverage. It's equipped with a braking device for stability during operation and parking.
• Electrical Control System: The "brain" of the hydraulic crane. It enables centralized control and monitoring of the hydraulic system, traveling mechanism, and safety protection devices through the control panel, handle (or remote control), sensors, and electrical components. Operators issue commands through it, and it provides alarms and protection in abnormal situations.

Features and Advantages

1. High Output Power and Strong Load Capacity: Hydraulic transmission can generate enormous driving force with relatively small structural dimensions, suitable for lifting heavy loads of large tonnage.
2. Excellent Speed ​​Control and Smooth Operation: Hydraulic transmission allows for stepless speed control with a wide speed range. The lifting, lowering, and movement of the entire gantry crane are smooth with minimal impact, effectively protecting both loads and itself.
3. Simple Operation and Low Labor Intensity: Through hydraulic control valves and electrical control systems, operators can achieve centralized and convenient control of movements. For some advanced models, users can realize wireless remote control to reduceabor and improve operational convenience and safety.
4. Compact Structure and Flexible Layout: Hydraulic components are small and easy to integrate, resulting in a relatively compact overall structure of the crane, which is particularly advantageous in space-constrained environments.
5. Strong Overload Protection and High Safety: The hydraulic system itself features excellent overload protection. With electrical safety protection devices (such as lifting height limit, travel limit, overload protection, emergency stop, etc.), it can maximize operational safety.
6. Diverse Power Source Options: Depending on the working environment, the hydraulic system features strong adaptability, driven by an electric motor (fixed power source) or an internal combustion engine (mobile operation, no power grid).

Application Fields

Hydraulic lifting cranes feature powerful lifting capacity, excellent operating performance, and wide adaptability. Customers widely use them in the following fields and scenarios:

• Ports and terminals: for loading, unloading, and handling of containers, bulk cargoes, and heavy goods.
• Shipbuilding and repair: lifting of hull sections, equipment installation, etc.
• Metallurgical industry: lifting of heavy objects such as molten steel ladles, steel billets, and rolling mills in steel plants.
• Heavy machinery manufacturing: assembly and relocation of large equipment components.
• Power construction: installation of large generator sets, transformers, and other equipment.
• Bridges and civil engineering: lifting of bridge components and large prefabricated parts.
• Warehousing and logistics: stacking and transfer of heavy materials in large warehouses.

Hydraulic Gantry Crane Parameters

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