Mobile Harbour Portal Crane: Heavy-Duty Rail Mounted Gantry Crane Solutions

Product Specification

Zehua’s Mobile Harbour Portal Crane is a heavy-duty rail mounted gantry crane system engineered for intensive cargo transfer across marine ports, docks, and terminal yards. Manufactured in compliance with international FEM, DIN, and IEC standards, this versatile rail mounted gantry crane operates alongside dock crane setups, crane harbour installations, and floor mounted jib crane units. Available in single-boom and four-bar linkage options, it provides superior stability for heavy cargo and container handling.

What is Mobile Harbour Portal Crane?

A Mobile Harbour Portal Crane (classified as an MQ pedestal portal crane) is a traveling rail mounted gantry crane mounted on an elevated portal base, specifically built for high-capacity freight transfer in waterfront and logistics facilities.

• Working Principle: Operating along quay rail runways, the crane combines continuous 360-degree slewing with motor-driven luffing and hoisting mechanisms to transfer cargo across lifting heights up to 45 meters.

• Jib Structural Configurations:

  • Single-Boom Rail Mounted Gantry Crane: Features a simplified lattice or box boom structure with light deadweight and high strength, offering an economical choice for general breakbulk handling.

  • Four-Bar Linkage Rail Mounted Gantry Crane: Employs an articulated lever arm mechanism that maintains a horizontal load trajectory during luffing operations. This prevents load elevation variations, ensures smooth movement, and lowers motor power consumption during continuous heavy duty.

• Core Structural Assemblies: Built upon a heavy-duty portal gantry frame weighing 30,000 kg, incorporating a slewing platform, structural jib boom, weatherproof operator cabin, and a machinery room housing Schneider electrical components, PLC, gearboxes, motors, pressure vessels, and pumps.

Key Features

• Robust Structure: Heavy-duty steel portal frame rated for A4 work duty and maximum wheel loads of 180–300 kN, supporting capacities up to 100 tons.

• High Safety Performance: Equipped with overload limit cutoffs, storm rail locks, emergency stop controls, pressure vessel safety valves, and anti-collision systems.

• Precise Load Control: Driven by Schneider electrical systems and an integrated PLC automation system for micro-speed positioning.

• Easy Maintenance: Ergonomic machinery room layout with accessible gearboxes, bearings, motors, and centralized lubrication points.

• Long Service Life: Applied with marine-grade protective coatings and durable drive components built to operate in temperatures from 20°C to 40°C.

• Energy Efficiency: Four-bar linkage level-luffing eliminates unnecessary vertical lifting work during luffing, significantly cutting overall electrical power usage.

Applications

• Harbors & Ports: Efficiently handles container transfers, breakbulk offloading, and heavy equipment loading along dockside rail runways.

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

• Shipyards: Essential for positioning massive hull blocks, steel plates, and marine propulsion units during ship construction and repairs.

• Manufacturing Plants: Transports heavy machinery modules, structural steel sections, and raw materials between docks and production bays.

• Warehouses & Logistics Hubs: Connects dockside rail tracks with open storage yards to accelerate intermodal freight distribution.

• Power Plants: Offloads massive power generation modules, turbines, boilers, and transformers at receiving docks.

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

Why Choose Zehua

• Professional Crane Manufacturing Experience: Based in Henan, China, Zehua is an original crane manufacturer with extensive engineering facilities dedicated to producing overhead, gantry, jib, and portal cranes.

• Customized Design Capability: We engineer every rail mounted gantry crane project to exact site parameters—tailoring rail spans, boom lengths, lifting capacities (10t–100t), and duty ratings.

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

• Strict Quality Inspection: Every crane undergoes complete structural evaluation, certified Machinery Test Reports, and video outgoing-inspections prior to shipment.

• Global After-Sales Support: Supported by a 1-year warranty, global remote engineering assistance, site commissioning guidance, and engineers available overseas for maintenance.

Installation & Maintenance

• Installation Requirements: Port runways must feature pre-aligned rail tracks rated for 180–300 kN wheel loads, supported by 380V 50Hz power hookups and auxiliary mobile cranes during erection.

• Daily Inspection Points: Inspect wire ropes, braking systems, slewing ring lubrication, safety limit switches, rail clamps, and pressure vessels before operating the rail mounted gantry crane.

• Maintenance Recommendations: Perform scheduled checks on gearbox oil levels, monitor PLC diagnostic logs, inspect structural welds, and refresh anti-corrosion protective coatings.

• Spare Parts Availability: Zehua maintains direct factory inventory for core replacement parts—including bearings, motors, gear sets, seal kits, and PLC modules—for rapid global shipment.

Frequently Asked Questions (FAQ)

Q: What is the lifting capacity of a Zehua rail mounted gantry crane?

A: Zehua rail mounted gantry crane units offer rated loading capacities ranging from 10 tons to 100 tons (with standard models rated at 25t, 35t, and 40t) to suit diverse port and industrial requirements.

Q: How do single-boom and four-bar linkage rail mounted gantry crane designs differ?

A: Single-boom rail mounted gantry crane designs offer structural simplicity, lighter weight, and economical cost. Four-bar linkage rail mounted gantry crane designs keep cargo moving horizontally during luffing, minimizing height variation and reducing energy consumption during heavy cycles.

Q: Does Zehua dispatch engineers overseas for installation and after-sales service?

A: Yes. As an original equipment manufacturer, Zehua provides full after-sales support, including certified test reports, video outgoing-inspections, and dispatching experienced engineers overseas for on-site installation and commissioning.

Q: How long does a heavy-duty rail mounted gantry crane installation take?

A: Site erection, rail alignment, and load testing typically take between 3 to 6 weeks, depending on foundation readiness, weather conditions, and site equipment availability.