Gantry Crane 30 Ton

 

Who Needs a 30-Ton Gantry Crane?

Heavy industries (steel, mining, energy).

Port operators handling large containers.

Construction firms working with mega-structures.

 

Rail-Mounted Gantry Crane (RMG)

Runs on fixed tracks for precision in shipyards/foundries.

Used for heavy, repetitive lifting (e.g., steel coils, containers).

Rubber-Tired Gantry Crane (RTG)

Mobile on paved surfaces (no rails needed).

Common in ports, scrap yards, and construction sites.

Adjustable Gantry Crane

Telescopic legs for varying workspace heights.

Modular design for easy relocation.

 

Comparison: 30-Ton Gantry vs. Overhead Crane

Feature	30-Ton Gantry Crane	30-Ton Overhead Crane
Installation	No runway beams needed	Requires fixed runway
Mobility	Rail or tire-based movement	Fixed to building structure
Cost	Lower initial investment	Higher installation cost
Outdoor Use	Yes (wind-resistant design)	Rarely suitable
Relocation	Possible (modular design)	Permanent installation

 

Lifting Capacity: 30 metric tons (30,000 kg)
Span: 10m–35m (customizable)
Lifting Height: 6m–20m (adjustable)
Hoist Type: Double-girder with electric wire rope hoist (QD-type)
Travel System: Motorized (rail-guided or rubber-tired)
Wheel Type: Steel wheels (for rails) / Pneumatic tires (floor use)
Control System: Cabin-operated or remote control
Power Supply: 380V/50Hz (3-phase)
Structural Steel: Q345B (high-strength) with corrosion-resistant coating

A 30-ton gantry crane is a heavy-duty lifting system composed of robust structural, mechanical, and electrical components. Below is a detailed breakdown of its key parts:

 

1. Structural Components

A. Main Girders (Bridge Beam)

Double-girder construction (box-type or truss design for 30-ton capacity)

Material: High-tensile steel (Q345B/ST52-3) with corrosion-resistant coating

Span: Typically 10–35 meters (customizable)

B. Support Legs

Fixed or adjustable-height legs (telescopic for variable workspaces)

Reinforced cross-bracing for stability against heavy loads

Outriggers (optional for outdoor stability)

C. End Carriages (Travel System)

Steel wheels (for rail-guided movement) or pneumatic tires (for floor use)

Drive motors (2–4 motors for synchronized travel)

Buffers & bumpers (impact protection at travel limits)

 

2. Lifting Mechanism

A. Hoist Unit

Type: Electric wire rope hoist (QD-type or European FEM standard)

Capacity: 30 tons (with 25% overload protection)

Drum & Rope:

Large-diameter drum with galvanized steel wire rope (ISO4308 standard)

Rope guide system to prevent tangling

 

B. Trolley Assembly

Motorized trolley (runs along girders with 4–8 wheels)

Reducer & Brakes:

Hardened gear reducer for smooth travel

Electromagnetic or hydraulic brakes

3. Power & Control System

A. Electrical Components

Control panel: IP54-rated with VFD (Variable Frequency Drive)

Power supply: 380V/50Hz 3-phase (or customized voltage)

Festoon/cable reel system for power transmission

B. Operator Controls

Radio remote control (IP65 waterproof for harsh environments)

Pendant station (wired, 8-button control)

Cabin control (optional for large spans)

4. Safety Systems

Load limiter (digital display with alarm at 95% capacity)

Limit switches (for hoist/trolley travel limits)

Anti-sway system (for precise load positioning)

Emergency stop (dual-circuit braking)

Anemometer (wind speed monitor for outdoor use)

.

5. Optional Accessories

Weighing system (integrated load cells)

LED work lights (for night operations)

Laser positioning (for container handling)

Crane collision avoidance (for multi-crane zones)

Maintenance Requirements

Daily: Check brakes, wire ropes, and limit switches

Monthly: Inspect gearboxes and structural welds

Annually: Replace worn wheels and re-calibrate sensors

SKETCH

Main technical

 

1. High Load Capacity & Stability

Handles 30,000 kg (30 tons) safely with reinforced double-girder construction.

Wide legs & cross-bracing prevent tipping during heavy lifts.

2. Customizable Design

Adjustable span (10–35m) and lifting height (6–20m) for different workspaces.

Options for rail-mounted (RMG) or rubber-tired (RTG) mobility.

3. Versatile Mobility

Rail-guided for precision in shipyards/steel plants.

Rubber-tired (RTG) for flexible movement in ports/logistics yards.

4. Cost-Effective vs. Overhead Cranes

No need for permanent runway beams (cheaper installation).

Relocatable for multi-site projects.

5. Advanced Safety Features

Overload limiter (auto-cutoff at 110% capacity).

Anti-sway & collision avoidance systems.

Fail-safe brakes & emergency stop.

6. Low Maintenance

Durable steel construction (Q345B/ST52-3 with anti-corrosion coating).

Modular components for easy repairs.

 

1. Steel & Metal Industry

Moving 30-ton steel coils, slabs, and beams.

Handling foundry molds and heavy castings.

2. Ports & Logistics

Loading/unloading shipping containers (20ft/40ft).

Stacking heavy cargo in storage yards.

3. Shipbuilding & Repair

Lifting ship hull sections, engines, and propellers.

Dry dock maintenance of large vessels.

4. Construction & Infrastructure

Installing precast concrete segments for bridges.

Moving heavy machinery (excavators, generators).

5. Power Plants & Energy Sector

Assembling wind turbine components.

Handling boilers and transformers.

6. Mining & Heavy Machinery

Transporting mining equipment (crushers, drills).

Maintenance of large dump trucks.

 

 

1. Design and Planning

Demand Analysis: According to customer needs and usage scenarios, a detailed demand analysis is carried out to determine the specifications, load, span, lifting height, etc. of the crane.

Engineering Design: Engineers use CAD and other design software to carry out detailed design, including structural, mechanical, electrical and other aspects to ensure that the design meets relevant standards and specifications.

2. Material Procurement

Material Selection: Select appropriate steel, motors, control systems and other components according to design requirements.

Supplier Screening: Screen suppliers of materials and components to ensure the quality and reliability of materials.

3. Processing and Manufacturing

Cutting and Forming: Cut, weld, bend and other processes on steel to form main beams, end beams and other structural components.

Machining: Precision machining of key components, such as turning, milling, drilling, etc., to ensure that the size and accuracy meet the design requirements.

Surface Treatment: Spray, galvanize or rust-proof metal parts to enhance corrosion resistance and aesthetics.

4. Assembly

Component Assembly: Assemble the main beam, end beam, trolley, lifting mechanism and other components to form a complete crane structure.

Installation of electrical system: Install electrical equipment such as motors, control cabinets, sensors, limit switches, etc. to ensure the normal operation of the electrical system.

5. Debugging and testing

Preliminary debugging: Carry out preliminary debugging of the crane to check the coordination and operation of each component.

Load test: Carry out load test to ensure the safety and stability of the crane under rated load, and test the functions of safety devices such as overload protection and limit switches.

Performance test: Test the performance indicators of the crane such as lifting speed, running speed, braking effect, etc. to ensure that they meet the design requirements.

6. Quality inspection

Quality inspection: Carry out a comprehensive quality inspection of the crane, including appearance, size, performance, etc., to ensure compliance with relevant standards.

Safety assessment: Carry out safety assessment to ensure the normal operation of all safety devices and systems.

7. Delivery and installation

Packaging and transportation: Pack qualified cranes and prepare them for transportation to the customer site.

On-site installation: Carry out on-site installation according to customer requirements, including basic production and equipment debugging.

Training and handover: Train operators to ensure that they master the operation methods and safety precautions of the equipment and complete the handover work.

 

 

 

 

 

 

 

Material Inspection

Quality Inspection: Strict quality inspection is carried out on the purchased raw materials to ensure that they meet the design requirements and national standards.

Material Storage: Qualified materials are stored according to classification to prevent corrosion or damage.

Cutting and Forming

Steel Cutting: Use plasma cutting, laser cutting or flame cutting and other technologies to cut the steel according to the size of the design drawing.

Forming Processing: Form the steel plate through bending, rolling, welding and other processes to manufacture the main beam, end beam and other structural parts.

Welding

Component Welding: The cut and formed steel parts are welded into the main structures such as the main beam, end beam and trolley. The welding process needs to be strictly controlled to ensure the structural strength and welding quality.

Weld Inspection: Use non-destructive testing technology (such as ultrasonic testing, radiographic testing) to inspect the welds to ensure that there are no cracks or other defects.

Machining

Precision Machining: Precision machining is performed on the key components of the crane, such as wheel sets, bearing seats, pulleys, etc., to ensure their dimensional accuracy and surface quality.

Assembly of the whole machine

General assembly: On the basis of pre-assembly, the overall assembly of the crane is carried out, including the final installation of the main beam, end beam, lifting mechanism, walking mechanism, etc.

Commissioning and testing

Under dynamic conditions, the operating performance of the crane is tested, including the testing of lifting, walking, steering and other functions. The overall size of the assembled bridge crane is checked to ensure that all dimensions meet the design requirements.

Spraying and anti-corrosion treatment

Surface treatment Rust removal: Rust removal on the surface of the crane, common methods include sandblasting, pickling, etc. Primer spraying: Spray anti-corrosion primer on the treated surface to prevent metal oxidation and corrosion. Topcoat spraying Color spraying: Spray topcoat according to customer requirements or industry standards to give the crane a protective and decorative effect. Marking: After spraying, mark the crane's identification information in accordance with the specifications, such as model, rated load, etc.

Factory and installation

Packaging and transportation

Packaging protection: Protectively package the key components of the crane to prevent damage during transportation. Transportation arrangement: According to the equipment size and transportation conditions, select a suitable transportation method to transport the crane to the customer's site.

Acceptance and delivery

Customer acceptance

On-site acceptance: The customer conducts on-site acceptance of the crane according to the contract requirements and technical specifications to check the performance and quality of the equipment.

Problem rectification: If any problems are found, the manufacturer needs to rectify them in time to ensure that the equipment fully meets the customer's requirements. Delivery and use Operation training: The manufacturer usually trains the customer's operators to ensure that they can operate the crane correctly and safely.

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