Comparison between shipbuilding portal cranes and portal cranes

Shipbuilding portal cranes are a specialized type of portal crane, primarily used in shipyards for shipbuilding and equipment installation. They possess higher lifting capacity and micro-motion control technology.

The main differences between portal cranes and shipbuilding portal cranes are:

I. Application Differences:

Shipbuilding portal cranes: Designed specifically for slipways, floating docks, and similar environments, used for hull assembly, equipment outfitting, and other lifting operations. Maximum lifting capacity can reach 300 tons. They require a micro-motion control system for precise positioning.

Portal cranes: Widely used in ports, docks, hydropower stations, and other environments for cargo loading and unloading, primarily in bulk cargo handling.

II. Structural Characteristics: Shipbuilding-specific models employ a double-hook system and a slewing boom structure, supporting 360° rotation.

Ordinary portal cranes are mostly single-hook designs, with a relatively simplified structure and limited operating range.

III. Technical Requirements: Shipbuilding models require rolling bearing-type slewing supports, torque limiters, and other safety devices.

Ordinary models prioritize operational efficiency and site adaptability, often employing variable frequency speed control systems to optimize performance.

Comparison of Advantages and Disadvantages between Gantry Cranes and Shipbuilding Gantry Cranes:

Shipbuilding portal crane (specifically used in shipbuilding)

Advantages:

Strong lifting capacity; standard double hook system meets the needs of heavy component lifting;

360-degree rotating boom structure enables full-coverage operation;

Left-mounted passageway allows transport vehicles to pass, adapting to the complex environment of shipyards.

Disadvantages:

Requires fixed supports or rails; installation and commissioning are time-consuming and costly;

Large footprint, unsuitable for operation in confined spaces.

Portal crane (general type)

Advantages:

Large span design covers a wide operating area;

High load capacity (tens to hundreds of tons);

Equipped with safety devices (such as lifting capacity limiters and rail clamps) to enhance safety.

Disadvantages:

Requires fixed rails or supports; poor mobility;

Complex installation and high cost;

Easily limited by space constraints during operation.