quay crane

Dock Crane Product Introduction

Product Overview

The dock crane is a heavy-duty lifting and handling equipment specifically designed for port terminals, wharves, and container yards. It is the core equipment for loading, unloading, stacking, and transferring cargo (containers, bulk goods, general cargo) in port logistics, connecting land and marine transportation efficiently. With high lifting capacity, large working radius, and stable operation performance, dock cranes are widely used in coastal ports, inland river terminals, and container terminals worldwide. Compliant with international port equipment standards (ISO, FEM, GB) and equipped with advanced control systems, they adapt to harsh working environments such as strong winds, humidity, and salt spray, significantly improving port handling efficiency and reducing manual labor intensity. As a key part of the global supply chain, dock cranes play an irreplaceable role in promoting international trade and logistics circulation.

Classification & Applications

Classification

By Cargo Type: Container dock crane (Quay Crane, RTG Crane), bulk dock crane (Grab Bucket Crane), general cargo dock crane, and container gantry crane.

By Structure Type: Fixed dock crane (quay-side fixed type), mobile dock crane (rubber-tired, rail-mounted), gantry dock crane, and jib-type dock crane.

By Lifting Capacity: Medium-duty (5t–20t), heavy-duty (20t–100t), ultra-heavy-duty (100t–500t), adapting to different cargo weights and terminal scales.

By Control Mode: Manual control dock crane, semi-automatic dock crane, fully automatic intelligent dock crane (equipped with PLC, IoT, and remote monitoring systems).

Applications

Container Terminals: Loading and unloading containers between ships and shore, stacking and transferring containers in yards (mainly using quay cranes, RTG cranes, and gantry cranes).

Bulk Cargo Terminals: Handling bulk goods such as coal, grain, ore, and cement, using grab bucket dock cranes for efficient loading and unloading.

General Cargo Terminals: Lifting and transferring general cargo (such as steel, machinery, and equipment) between ships, trucks, and warehouses.

Inland River Terminals: Adapting to small and medium-sized ships, handling cargo such as containers, building materials, and daily necessities, promoting inland waterway logistics.

Port Logistics Hubs: Connecting land transportation (trucks, trains) and marine transportation, realizing seamless cargo transfer, and improving the overall efficiency of port logistics.

Working Principle

Dock cranes operate through the coordinated work of power systems, transmission mechanisms, lifting mechanisms, and control systems, tailored to port handling scenarios:

Power Supply: Most dock cranes are powered by 3-phase AC power (380V/440V) from the port power grid; some mobile models are equipped with diesel generators for emergency or outdoor operations.

Lifting Movement: The power system drives the hoisting winch (equipped with high-strength steel wire ropes and hooks) to wind or unwind, realizing vertical lifting and lowering of cargo. The lifting speed is adjustable according to cargo weight to ensure stable handling.

Slewing & Luffing: The slewing mechanism (slewing bearing + reduction gearbox) drives the crane boom or trolley to rotate 360° (or within a fixed range), enabling omnidirectional handling; the luffing cylinder adjusts the boom angle to change the working radius, adapting to different ship positions and cargo stacking needs.

Traversal Movement (Mobile Models): Rubber-tired or rail-mounted dock cranes rely on the traversal mechanism to move along the wharf or yard, expanding the operation range and improving handling flexibility.

Safety & Control: The intelligent control system integrates overload protection, anti-sway control, wind speed monitoring, emergency stop, and remote monitoring functions. It can automatically adjust operation parameters according to environmental conditions (such as wind speed) to ensure the safety of personnel, equipment, and cargo.

Performance Advantages

High Handling Efficiency: Equipped with high-power motors and hydraulic systems, fast lifting, slewing, and traversal speeds, capable of handling dozens to hundreds of containers or tons of bulk goods per hour, meeting the high-efficiency requirements of large ports.

Strong Load-Bearing Capacity: Adopts high-strength steel structure (Q355B/Q460 steel) and precision casting components, with excellent rigidity and stability, capable of stably lifting heavy cargo (up to 500t) and adapting to long-term continuous operation.

Excellent Environmental Adaptability: Anti-corrosion coating on the surface, sealed electrical components, and wind-resistant design, capable of working normally in harsh port environments such as salt spray, humidity, strong winds (≤12-level), and high temperature.

Intelligent & Easy Operation: Supports fully automatic, semi-automatic, and manual control modes; equipped with PLC control system, IoT monitoring, and remote operation functions, reducing manual labor intensity and improving operation accuracy.

Safe & Reliable: Complies with international safety standards and port equipment certifications, equipped with complete safety protection devices (overload, limit, anti-sway, wind speed alarm), low failure rate, and stable operation for long hours.

Space-Saving & Flexible: Reasonable structural design, mobile models can move freely along the wharf or yard, fixed models occupy a small space, adapting to different terminal layouts and operation spaces.

Easy Maintenance & Long Service Life: Modular design, standardized components, convenient daily inspection and maintenance; high-quality materials and advanced manufacturing processes ensure a service life of 15–20 years, reducing long-term operation costs.

Customizable Design: Can be customized according to terminal scale, cargo type, and operation needs, such as lifting capacity, working radius, control mode, and anti-corrosion level.

Technical Parameters

Customized parameters (such as lifting capacity, lifting height, boom length, and intelligent configuration) are available according to the specific needs of the terminal and cargo handling scenarios.