Port Machinery
Four-link Portal Crane
Four-link Portal Cranes, known for efficient and stable material handling, adopt a four-link combined jib system, equipped with slewing, luffing, traveling, and hoisting functions. This model supports 360° full slewing, offers extensive operational coverage, and is designed to withstand high-intensity continuous operations. They are widely used for bulk cargo, general cargo, and container handling.
1. Unique Design of Slewing Bearing that Enables Crane-Synchronized Lifespan
Our decades-accumulated machining expertise and membership on China's Boom Crane Standardization Committee ensure the slewing bearing – the most critical mechanical component of portal cranes – achieves identical operational lifespan as the entire machine.
2. Low-Center-of-Gravity Design
The high-boom, low-slewing-platform design concept lowers the center of gravity of portal cranes, significantly enhancing overall machine stability.
3. Special Steel Wire Rope Reeving with Low-wear Design
Utilizing same-direction parallel winding, this method significantly reduces wire rope wear, extends service life by over 20%, and lowers maintenance and replacement costs.
4. Quick-Change Spreader System
The quick-change interface enables seamless switching among grabs, hooks, and container spreaders within 3-5 minutes.
5. Spreader Auto-Tracking
Container spreaders synchronize counter-rotation with the slewing mechanism, maintaining parallel alignment with trucks at all times in a way to boost loading efficiency
6. Full Electric Drive
Eco-friendly operation with 380V–20kV power compatibility
7. Steel Rail Travel System
Forged steel wheels support higher loads with minimal wear, eliminating frequent wheel replacements and slashing maintenance costs
8. Multi-Level Safety Protections
Intrinsic crane safety remains our core objective. The redundant design of multiple safety mechanisms,combines real-time data tracking via cloud-based monitoring systems to ensure operational safety.
9. Anti-Sway Grab Control System
Modeling of the portal slewing system enables calculation of grab swing angles. Intelligent control regulates slewing and luffing speeds to eliminate swing, achieving effective sway elimination.
10. Automated Operation System
Portal cranes memorize material loading/unloading positions and operation paths. Combined with grab anti-sway, precision positioning, and collision avoidance algorithms, this enables fully automatic grab operations.
11. Boom Anti-Collision System
Boom anti-collision system utilizes real-time monitoring of portal crane radius, boom angle, and positional coordinates to establish a collaborative equipment network. By sharing operational data with adjacent machinery and constructing a group intelligence model, the system implements intelligent algorithms to provide active boom collision protection.
12. Energy Regeneration System
Energy regeneration system converts electrical energy generated during load descent or motor deceleration and feeds it back into the grid, achieving energy recovery to meet energy-saving and emission-reduction objectives.
13. Energy Recovery System
Stores electrical energy generated during load descent or motor deceleration in battery banks or supercapacitors, releasing it during subsequent operations. This enables energy reuse while reducing the entire system's input power demand.
14. High Power Factor & Low Harmonic Distortion
Incorporating active harmonic filtering and reactive power compensation technology to raise power factor, reduce line losses and optimize electrical power quality.
15. High-Efficiency Handling
Bulk Cargo: Up to 1,200 t/h
Containers: Up to 30 TEU/h
Four-link Portal Crane
