Gantry Crane 20t Gantry Crane

Sure! Here's a concise introduction for a 20-ton gantry crane:

20T Gantry Crane Introduction

A 20-ton gantry crane is a type of heavy-duty lifting equipment designed to handle loads up to 20 tons (20,000 kg). It operates on a gantry structure, typically consisting of two vertical legs and a horizontal girder, allowing it to span a large workspace. These cranes are widely used in construction sites, shipyards, manufacturing plants, and warehouses for loading, unloading, and material handling.

Key Features:

Lifting Capacity: 20 tons

Span & Height: Customizable based on application needs

Structure: Single or double girder design

Mobility: Can be rail-mounted or rubber-tired for flexibility

Power Source: Electric-powered with control options (cab, pendant, or remote)

Durability: Made with high-strength steel for stability and longevity

Advantages:

Efficient for indoor and outdoor material handling

Reduces manual labor and improves operational safety

Adaptable to various industries and working environments

20T gantry cranes provide a cost-effective and powerful solution for heavy lifting tasks, especially where overhead crane installation isn't feasible.

Core Components PLC, Engine, Bearing, Gearbox, Motor, Pressure vessel, Gear, Pump

Place of Origin Henan, China

Warranty 1 Year

Weight (KG) 30000 kg

Application Precast yard, construction site, warehouse, etc.

Product name 40 ton straddle carrier rubber tired single girder gantry cranes

Crane Type A Type, Single Girder, Double Girder Straddle Carrier

Lifting mechanism Customer Requirements

Control Method Cabin Control+Remote Control

Lifting Capacity 5~1200 Ton

Multiple Steering Modes Go straight, transverse traveling, carousel steering, etc.

Install On-site and online

Motor Famous brand

Work Duty A3~A5

1. Main Girder (Beam)

The horizontal structure that spans the gap between the crane legs.

Supports the hoist and trolley mechanism.

Can be single girder or double girder, depending on the design and load distribution.

 Legs (Supports)

Vertical steel columns that support the main girder.

Can be A-frame, box-type, or lattice-type depending on the application.

Connect the main girder to the ground rails or wheels.

Hoist

The lifting mechanism responsible for raising and lowering loads.

Can be wire rope hoist or electric chain hoist, rated for 20 tons.

Mounted on the trolley.

Trolley

Moves the hoist back and forth along the main girder.

Enables precise load positioning.

Can be manually operated or motor-driven.

3.End Carriages / Wheels

Located at the base of each leg.

Equipped with wheels (for mobile gantry cranes) or rail-mounted bogies (for fixed gantries).

Allow the crane to travel horizontally along the runway.

4.Crane travelling mechanism

Key Components of the Travelling Mechanism Drive System:Electric motors: Provide the power for movement.Gearboxes: Control the speed and torque of the motors.Wheels and Rails:Wheels are mounted at the base of the gantry legs or on a trolley. They are typically made of high-strength steel to handle heavy loads.Rails are fixed on the ground or a beam, guiding the wheels for smooth travel.

Braking System:Electromagnetic or mechanical brakes ensure stability by preventing unwanted movement when stationary.Controls:Operated manually (via a control panel or pendant) or through wireless remote control systems.

Travelling Mechanism Types,Gantry Movement:The entire gantry crane structure moves along a fixed rail system.Trolley Movement:A trolley equipped with a hoist travels horizontally along a beam (cross-travel) while the gantry remains stationary.

Safety Mechanisms:Anti-collision devices: Prevent accidental impacts between cranes or structures.Limit switches: Ensure safe stopping at end points.

Maintenance Tips,Regularly inspect wheels and rails for wear and alignment.Lubricate moving parts to ensure smooth operation.Check the electrical system for faults or damage.

5.Trolley travelling mechanism

1. Trolley Frame:A robust steel structure designed to support the hoist and handle heavy loads. It connects all the components of the trolley mechanism.Wheels:The trolley is equipped with wheels (usually four or more), which run along the flange of the gantry beam or a dedicated track.Wheels are typically made of high-strength steel and can be plain, flanged, or grooved, depending on the rail or beam design.

2. Electric Motor: Powers the trolley's movement. Motors are often equipped with variable frequency drives (VFD) for smooth acceleration and deceleration.Gearbox: Converts the motor's rotational speed into the desired torque and speed for moving the trolley.Couplings and Shafts: Transmit power from the motor to the wheels.

3.Operated via:Pendant Control: A wired controller suspended from the crane.Remote Control: Wireless operation using radio frequency.

Cabin Control: For larger cranes, an operator's cabin may be provided.

4.Braking System:Includes mechanical or electromagnetic brakes to stop and hold the trolley in place.Brakes engage automatically when power is cut or when the trolley is stationary.

Crane wheel

Key Features of Crane Wheels;Material:Typically made from high-strength steel or alloyed materials to withstand heavy loads and resist wear.Common materials include carbon steel, forged steel, or heat-treated steel to enhance durability.

Design:Flat Wheels: Used for flat-topped rails, allowing lateral movement flexibility.Flanged Wheels: Feature a flange on one side to prevent derailment and maintain alignment with the rail.Double-Flanged Wheels: Provide additional safety by keeping the wheel securely on the track, often used in heavy-duty applications.Tread Profile: Designed to distribute the load evenly and reduce wear.

Tread Profile: Designed to distribute the load evenly and reduce wear.Dimensions:Vary depending on the size and capacity of the crane.Key parameters include wheel diameter, tread width, and flange thickness.Mounting:Mounted on axles or shafts, either directly or via bearings.Bearings reduce friction and enable smooth rotation.

Crane Hook

Key Features of Crane Hooks Material:Typically made from high-strength materials such as forged steel or alloy steel.Designed to withstand heavy loads, impact forces, and harsh working conditions

Design:Single Hook: A simple, straight design used for general lifting tasks.Double Hook: Features two prongs, used for balancing heavier loads and reducing stress on each hook.Rotating Hook: Allows 360-degree rotation for precise load positioning.Safety Latch: Most crane hooks include a latch to prevent the load from slipping off the hook.

Load Capacity:Varies widely depending on the crane's design and application.Clearly marked on the hook for operator safety.

Hook Shapes:C-Hook: Used for handling coils and cylindrical loads.Eye Hook: Features a circular eye for secure attachment to the hoist or chain.Clevis Hook: Includes a U-shaped clevis and pin for quick attachment.

Motor

Key Features of Crane Motors Motor Types:Squirrel Cage Induction Motors:Commonly used for their durability and low maintenance.Suitable for applications requiring constant speed.Slip Ring Induction Motors:Used where variable speed is needed, such as in hoisting mechanisms.Servo Motors:Provide precise control, often used in advanced cranes.Brake Motors:Include built-in braking systems for immediate stopping.

Power Rating:Ranges from a few kilowatts for small cranes to hundreds of kilowatts for heavy-duty industrial cranes.The rating depends on the crane's lifting capacity and operational requirements.

Design:Duty Cycle: Designed for intermittent or continuous operation, depending on the application.Insulation: High-grade insulation to withstand harsh industrial environments.Cooling: Equipped with cooling systems (fan-cooled or liquid-cooled) to prevent overheating.

Control Features:Motors often work with Variable Frequency Drives (VFD) or motor controllers for:Speed control.Smooth acceleration and deceleration.Reduced power consumption.

Sound and light alarm system & limit switch

Key Features of the Alarm System,Audible Alarm (Sound)Emits a loud, distinct sound, such as a siren or buzzer, to alert workers.Typically activated during crane operation, load movement, or in emergencies.Sound level: Adjusted to ensure audibility over background noise.Visual Alarm (Light);High-intensity flashing or rotating lights (commonly red or yellow) provide a visual warning.Helps alert personnel in noisy environments or when hearing protection is used.

Control Integration;Activated automatically during specific operations (e.g., hoisting, traveling) or manually by the operator.Often integrated with other safety systems like anti-collision sensors.Functions of the Alarm System Movement Alerts: Warn workers when the crane or load is in motion.Collision Prevention: Signal potential obstructions or proximity to other equipment.

Emergency Indication: Highlight faults, overload conditions, or other emergencies.Maintenance Tips Regularly test sound levels and light visibility.Replace worn-out bulbs, LED, or speakers.Ensure proper wiring and connection to the control system.

Safety Devices

Safety Devices in Stationary Gantry Cranes,Safety devices in stationary gantry cranes are essential for protecting workers, equipment, and materials during operation. They help prevent accidents, ensure smooth crane operations, and comply with workplace safety regulations.

used in stationary gantry cranes: Overload Protection Device Function: Prevents the crane from lifting loads exceeding its rated capacity.

Mechanism:Equipped with load cells or strain gauges to measure the load weight.Automatically interrupts the hoist operation if the load exceeds the limit.Importance: Protects the crane structure and prevents accidents caused by overloading.

Anti-Collision Devices,Function: Detects proximity to other cranes, structures, or obstacles.Mechanism:Uses sensors like ultrasonic, infrared, or radar to detect objects.Triggers alarms or stops crane movement to prevent collisions.Importance: Reduces the risk of accidents and equipment damage in multi-crane environments.

Emergency Stop System,Function: Allows operators to immediately halt all crane operations in emergencies.Mechanism:Operated via buttons located on the control panel, remote control, or at accessible positions.Disconnects power to critical systems.Importance: Provides quick response capability during emergencies, minimizing risks.

Anti-Sway System,Function: Minimizes load swaying during lifting and movement.Mechanism:Employs advanced control systems to counteract pendulum effects.Uses sensors and software to adjust motor speeds dynamically.Importance: Enhances precision and safety during load handling.

11.Control Mode

1. Types of Control Modes for Stationary Gantry Cranes,Pendant Control;Description: The operator uses a wired or wireless pendant control unit to operate the crane from a safe distance.Components: A handheld device with buttons or joysticks for controlling movement and functions.

2. Cabin Control;Description: The operator is stationed in a control cabin that is mounted on the crane or nearby the crane's operating path.Components: Equipped with buttons, joysticks, pedals, and sometimes touchscreens for controlling crane functions.

3. Remote Control;Description: Uses a wireless remote control device, which can be handheld or worn on the operator's body.Components: A compact device with buttons or joysticks, similar to a pendant control but without a cable.

4.Automatic Control (Automated Control);Description: The crane operates according to pre-programmed commands and sequences without operator intervention.Components: Includes sensors, programmable logic controllers (PLC), and control software that manage the crane's functions.

Sketch

Main technical

Advantages of a 20T Gantry Crane

A 20-ton gantry crane offers a powerful, flexible, and cost-effective solution for handling heavy loads across various industries. Below are the key benefits:

✅ 1. High Lifting Capacity

Easily handles loads up to 20 tons, making it ideal for heavy-duty applications in manufacturing, construction, logistics, and shipyards.

✅ 2. Versatile Installation

Can be used indoors or outdoors without the need for permanent building structures like overhead cranes.

Suitable for temporary or permanent setups.

✅ 3. Cost-Effective Infrastructure

No need for runway beams or ceiling supports, reducing construction and installation costs compared to bridge cranes.

✅ 4. Easy Mobility

Mobile gantry cranes can be moved to different locations within a facility or between sites, increasing flexibility.

✅ 5. Customizable Design

Adjustable span, height, and features to fit specific working environments.

Available in single or double girder configurations depending on span and duty cycle.

✅ 6. Increased Safety

Equipped with safety features like limit switches, overload protection, and emergency stops.

Reduces the need for manual lifting, minimizing injury risks.

✅ 7. Efficient Material Handling

Speeds up loading, unloading, and transferring of heavy items.

Improves operational productivity and reduces downtime.

✅ 8. Low Maintenance Requirements

Designed with durable materials and reliable components for long service life and minimal upkeep.

Of course! Here's a detailed overview of the applications of a 20-ton gantry crane:

Applications of a 20T Gantry Crane

The 20-ton gantry crane is widely used in industries where heavy lifting and precise material handling are essential. Its adaptability and strength make it suitable for a broad range of applications:

🏗️ 1. Construction Sites

Lifting and moving steel beams, precast concrete, and heavy equipment.

Ideal for outdoor use where overhead cranes aren't practical.

🚢 2. Shipyards and Marine Industries

Handling ship components, engines, containers, and large assemblies.

Perfect for loading and unloading vessels or dockyard operations.

🏭 3. Manufacturing Plants

Transporting heavy machinery, molds, dies, and raw materials.

Often used in steel fabrication, automotive, and heavy equipment manufacturing.

📦 4. Warehouses and Logistics Yards

Moving large pallets, containers, or bulky goods in storage yards.

Increases efficiency in inventory handling and loading/unloading trucks.

🚆 5. Rail Yards and Transport Hubs

Lifting rails, bogies, and large train parts.

Supports railcar maintenance and assembly operations.

🛠️ 6. Heavy Equipment Maintenance

Used in mining, energy, and oil & gas sectors for moving large components.

Helps in the repair, replacement, and installation of massive parts.

🧱 7. Precast Concrete Yards

Ideal for handling concrete slabs, blocks, pipes, and panels.

Improves productivity and safety in precast production environments.

🛤️ 8. Infrastructure Projects

Assists in bridge construction, tunnel segments, and large-scale civil works.

Moves heavy segments and components with ease on-site.

1. Design stage: Determine the parameters of the crane, such as rated load, span and lifting height, according to the customer's needs and working environment. Carry out detailed structural design, including main beam, end beam, crane, lifting mechanism, etc., to ensure that the design meets safety standards and usage requirements. Select appropriate materials according to the design, usually high-strength steel to ensure the stability and durability of the structure.

2. Manufacturing stage: Prepare the required raw materials and parts according to the design drawings. Cut, bend and shape the steel to prepare structural components such as main beams and end beams. Weld the various components and assemble them into an overall structure. This step requires guaranteed welding quality to ensure strength and stability.

3. Machining: Machining key components such as motors, gears, bearings, etc. to ensure that their size and accuracy meet the requirements. Anti-corrosion treatment of components, such as painting and galvanizing, increases the durability and aesthetics of the equipment.

4. Electrical system installation: Install electrical components such as motors, controllers, switches, sensors and alarm systems. Connect and wire cables to ensure the normal operation of the electrical system.

5. Assembly phase: Assemble all components and systems as a whole, connect the lifting mechanism, trolley running mechanism and control system. Perform a comprehensive inspection of the assembled crane to ensure that all components and systems are working properly, and perform preliminary debugging.

6. Testing phase: Perform static load test on the crane to check the structural strength and stability. Perform dynamic test on the crane, including tests on lifting, moving, braking and other functions, to ensure that its performance meets the design requirements. Check the functions of safety devices, such as limit switches, overload protection, etc., to ensure the safety of the equipment during operation.

7. Quality control: Perform quality control on each link in the production process to ensure compliance with industry standards and customer requirements. Record various data and inspection results in the production process for subsequent traceability and analysis.

8. Delivery and installation: Pack and prepare the completed crane for transportation to ensure that it is not damaged during transportation. Deliver the crane to the customer's site for installation, and perform on-site debugging and acceptance. Provide operation training to customers to ensure that they are proficient in the use and maintenance of the crane.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.