Weihua four-link portal slewing crane is a large-scale lifting equipment that adopts a four-link combined jib system. This design allows the load to move almost horizontally when the crane luffs (adjusts the working radius) while carrying heavy loads, resulting in smoother, more efficient, and energy-saving operation. It possesses strong versatility; by changing the hook, grab, or container spreader, it can efficiently handle bulk cargo, general cargo, and containers.
The main structure of this crane can be summarized into the following key parts:
| Structural Component | Function & Feature Description |
|---|---|
| Four-Link Combined Jib System | The core structure, precisely hinged by the fly jib, main tie rod, jib, and support structure on the gantry. It is key to achieving horizontal load luffing. |
| Gantry & Travel Mechanism | Typically adopts a cylindrical gantry structure, supports the entire upper weight, and travels along ground rails, enabling the whole machine to move. |
| Hoisting Mechanism | Responsible for the vertical lifting and lowering of goods, one of the core power mechanisms of the crane. |
| Luffing Mechanism | Drives the jib to raise and lower, changing the working radius. The four-link system ensures the hook path is nearly horizontal during luffing. |
| Slewing Mechanism | Drives the upper part of the crane (including the jib, operator’s cab, etc.) to perform a 360-degree full rotation, enabling wide-area coverage operations. |
| Operator’s Cab & Electrical Control System | The cab is typically equipped with an intelligent status monitoring control screen for monitoring and fault diagnosis. The whole machine uses a PLC control and AC variable frequency speed regulation system. |
This crane is key equipment for modern ports, terminals, and large-scale industrial bases.
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