Fourlink Harbour Crane: Heavy-Duty Mobile Portal Crane Solutions

Product Introduction

Zehua’s Fourlink Harbour Crane is an advanced, heavy-duty mobile portal crane engineered for high-capacity cargo transfer at ocean ports, docks, and maritime terminals. Built in full compliance with DIN, FEM, and IEC standards, this industrial mobile portal crane operates seamlessly alongside dock crane configurations, rail mounted gantry crane installations, and floor mounted jib crane units. Featuring a four-bar linkage mechanism, our mobile portal crane ensures level luffing, exceptional operational stability, and low energy consumption.

What is Fourlink Harbour Crane?

The Fourlink Harbour Crane (classified as a sea port portal ship crane) is a high-capacity mobile portal crane that travels along dockside tracks, utilizing an articulated four-bar linkage jib system to execute continuous loading and unloading tasks.

• Working Principle: Moving on a 35m rail span at speeds between 15 and 30 m/min, this mobile portal crane combines 360-degree slewing with level-luffing motion across a working radius from 10 m to 120 m.

• The Four-Bar Linkage Advantage: Unlike traditional single-jib systems where the load moves vertically during luffing, the four-bar linkage system keeps the cargo trajectory horizontal. This level-luffing mechanism minimizes height variation, reduces load sway, improves cycle speeds, and drastically cuts motor power consumption.

• Main Structures: Built upon a heavy-duty portal gantry frame weighing over 1,005,000 kg, featuring a slewing platform, four-bar linkage boom assembly, ergonomic operator cabin, pressure vessels, gearboxes, motors, hydraulic pumps, and Schneider/Siemens electrical control units.

Key Features

• Robust Structure: High-strength structural steel frame rated for work duties from A3 to A8, handling extreme operational loads up to 1,800 tons.

• High Safety Performance: Fitted with storm rail clamps, overload cutoffs, pressure vessel safety valves, and anti-collision monitoring systems.

• Precise Load Control: Driven by Siemens and Schneider electrical components with cabin and optional wireless remote controls for micro-speed positioning over a 120 m radius.

• Easy Maintenance: Centralized lubrication lines, accessible machinery decks, and integrated diagnostic controls shorten routine service intervals.

• Long Service Life: Treated with multi-layer marine protective paint and equipped with hardened drive components for continuous sea port exposure.

• Energy Efficiency: The four-bar level-luffing kinematics eliminate unnecessary vertical lifting work during luffing, maximizing energy savings.

Technical Specifications

Applications

• Harbors & Sea Ports: Efficiently handles container loading, breakbulk transfer, and heavy cargo offloading along ocean berths.

• Shipyards: Essential for lifting massive hull blocks, structural steel plates, and marine propulsion equipment during vessel assembly.

• Steel Mills: Moves heavy steel slabs, coils, billets, and raw scrap metal across waterfront staging yards.

• Power Plants: Offloads heavy turbines, industrial boilers, generators, and transformers at receiving docks.

• Mining Industry: Manages bulk mineral transfer, ore handling, and heavy mining equipment staging at coastal export terminals.

• Manufacturing & Freight Hubs: Connects rail yards with dockside storage zones to speed up heavy intermodal logistics.

Why Choose Zehua

• Professional Crane Manufacturing Experience: Based in Henan, China, Zehua is an original crane manufacturer with deep engineering expertise in high-capacity portal, overhead, and gantry crane systems.

• Customized Design Capability: We tailor every mobile portal crane to your site infrastructure, customizing lifting capacities (up to 1,800T), rail spans, working radii, and control configurations.

• International Quality Standards: Equipment is designed, fabricated, and inspected in compliance with DIN, FEM, IEC, AWS, GB, CE, and ISO standards.

• Strict Quality Inspection: Every mobile portal crane undergoes comprehensive factory testing, complete with certified Machinery Test Reports and video outgoing-inspections.

• After-Sales Support: Backed by a 1-year warranty, global field technical support, on-site commissioning guidance, and lifetime spare parts supply.

Installation & Maintenance

• Installation Requirements: Port runways must feature reinforced rail foundations aligned to a 35m span, supported by adequate terminal power infrastructure and auxiliary heavy cranes during erection.

• Daily Inspection Points: Check wire ropes, four-bar linkage connecting pins, Schneider/Siemens electrical circuits, brakes, limit switches, and pressure vessels before each shift.

• Maintenance Recommendations: Follow scheduled lubrication for slewing bearings and linkage joints, perform periodic gearbox oil changes, check hydraulic pumps, and inspect structural welds.

• Spare Parts Availability: Zehua stocks genuine factory replacement parts—including bearings, motors, gear sets, seal kits, and PLC modules—for fast worldwide dispatch.

Frequently Asked Questions (FAQ)

Q: What is the lifting capacity and radius of a Zehua fourlink mobile portal crane?

A: The Zehua fourlink mobile portal crane covers lifting capacities from 10T up to 1,800T (with standard model ratings at 16t, 25t, 40t, and 45t) and offers an expansive working radius extending from 10m to 120m.

Q: Why choose a fourlink mobile portal crane over a single-jib model?

A: A fourlink mobile portal crane utilizes an articulated lever jib system that maintains a horizontal load trajectory during luffing. This prevents elevation changes, ensures smoother cargo movement, and significantly reduces motor power consumption during continuous terminal operations.

Q: What international standards does Zehua follow during manufacturing?

A: As an established crane manufacturer, Zehua designs and fabricates every mobile portal crane in compliance with DIN, FEM, IEC, AWS, GB, CE, and ISO standards, ensuring safety and quality for global B2B buyers.

Q: What control options and electrical parts are fitted on Zehua mobile portal crane equipment?

A: Our mobile portal crane units are equipped with premium Schneider or Siemens electrical components, offering cabin control combined with customized wireless remote control options for precise handling.