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Grab Pneumatic Ship Unloader
Introduction
Application Scenario
Advantages
Structural Diagram And Parameter Table
INTRODUCTION
A Grab Pneumatic Ship Unloader is a dual-mechanism bulk unloading system that combines a heavy-duty mechanical grab bucket for high-volume primary discharge with a pneumatic suction system for residual hold cleanup and fine bulk handling. Mounted on a quay-side rail or stationary tower, it efficiently transfers dry bulk cargoes—such as grain, cement, alumina, and fertilizer—from bulk carriers directly to shore-side conveyor networks.
APPLICATION SCENARIO
Grain & Agricultural Terminals: Dust-free, low-damage unloading of wheat, corn, soybeans, and animal feed from bulk carriers directly into onshore silos.
Cement & Powder Terminals: Unloading fly ash, cement, alumina powder, and chemical fertilizers through fully sealed vacuum pipelines.
Multi-Purpose Bulk Ports: Handling mixed bulk shipments (coarse minerals via grab + fine powders via pneumatic nozzle) at a single berth.
ADVANTAGES
Dual-Material Handling: Effortlessly switches between heavy bulk via mechanical grabs and delicate/dusty powders via vacuum pneumatic suction.
Dust-Free & Eco-Friendly: Pneumatic negative-pressure conveyance completely encloses fine materials, eliminating dust spillage and cargo loss at the dock.
High Hold-Cleaning Efficiency: Suction nozzles reach tight corners, hatches, and bottom layers of ship holds, drastically reducing manual hold cleanup time.
STRUCTURAL DIAGRAM AND PARAMETER TABLE
| Parameter | Specification |
|---|---|
| Working Class | A7, A8 (Heavy to very heavy duty for continuous port operation) |
| Rated Capacity | 400 t/h – 3,000 t/h (depending on material type and vessel size) |
| Lifting Capacity | 16 t – 65 t (standard, up to 100 t for special design) |
| Span (Rail Gauge) | 10.5 m – 90 m (distance between quay rails) |
| Waterside Outreach | 20 m – 50 m (from quay rail to ship centerline) |
| Back Reach | 8 m – 40 m (from quay rail to hopper) |
| Lifting Height (Above Rail) | 14 m – 30 m (to ship hatch cover) |
| Lifting Depth (Below Rail) | 12 m – 26 m (for deep ship holds at low tide) |
| Lifting Speed | 110 – 180 m/min (full load/empty load) |
| Trolley Travelling Speed | 160 – 180 m/min (high-speed for efficient operation) |
| Crane Travelling Speed | 20 – 30 m/min (along quay rail) |
| Boom Luffing Time | 5 – 7 minutes (one-way) |
| Luffing Angle | 0° – 80° (from horizontal) |
| Control Method | Fully automatic / Semi-automatic / Remote radio control / Cabin control |
| Power Supply | 10kV / 50Hz / 3-phase |
| Temperature | -20°C to +50°C |
| Protection Grade | Motors: IP54 – IP55, Insulation class F or H Electrical cabinet: dust/water protected design |
| Vessel Size | 10,000 DWT – 350,000 DWT (standard) |
| Max Wheel Load | ≤550 kN (working condition) |
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