Engineering Products Gantry Crane

 

Gantry Crane Introduction

A gantry crane is a type of overhead crane that is supported by freestanding legs and moves along a track or rail, typically used for lifting and transporting heavy loads. Unlike bridge cranes, which are fixed to building structures, gantry cranes are often used in open areas such as shipyards, warehouses, manufacturing plants, and construction sites.

Key Features:

Structure: Comprises a horizontal bridge supported by vertical legs. The bridge typically carries a hoist trolley for lifting and moving loads.

Mobility: Can be rail-mounted or rubber-tired for portability across large work areas.

Capacity: Designed to handle a wide range of loads, from small components to heavy industrial equipment (from a few tons to hundreds of tons).

Customization: Engineered to fit specific applications, including single or double girder designs, adjustable heights, and spans.

Applications:

Manufacturing: Transporting heavy tools, dies, or fabricated parts across assembly lines.

Shipping Yards: Loading and unloading shipping containers.

Construction: Moving large structural elements like steel beams or precast concrete.

Maintenance: Lifting equipment for repair or maintenance in industrial facilities.

Advantages:

Flexible installation with no need for a permanent overhead structure.

High load capacity and wide working span.

Customizable for indoor or outdoor use.

 

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

 

 

Bridge Girder

Function: The main horizontal beam that supports the trolley and hoist.

Types: Can be single girder or double girder, depending on load capacity and span requirements.

 

Legs (Support Columns)

Function: Vertical structures that support the bridge girder.

Design: Mounted on wheels or rails for mobility. In full gantry cranes, both ends rest on the ground; in semi-gantry cranes, one side is supported by a building.

Hoist

Function: The lifting device that raises, lowers, and holds the load.

Types: Can be electric or manual. Often includes a wire rope or chain mechanism.

 

 Trolley

Function: Moves along the bridge girder and carries the hoist.

Types: Motorized or push-pull types depending on the application and load.

 

3.End Carriages / Wheel Assemblies

Function: Located at the base of the legs, they allow the crane to travel horizontally on rails or tracks.

Design: Include wheels, motors, and braking systems for movement and positioning.

 

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 Gantry Cranes

Gantry cranes offer a range of benefits that make them highly effective for material handling in various industries, including construction, manufacturing, logistics, and shipbuilding.

---

1. Structural Flexibility

Freestanding Design: Unlike overhead cranes, gantry cranes don't require permanent structural support from a building.

Indoor & Outdoor Use: Suitable for both environments due to their independent framework.

---

2. Cost-Effective Installation

Lower Infrastructure Cost: No need for building reinforcements or support beams.

Quick Setup: Easier to install and relocate compared to fixed overhead cranes.

---

3. High Load Capacity

Can handle a wide range of weights-from light components to extremely heavy machinery or containers.

---

4. Mobility and Versatility

Rail-mounted or Wheel-mounted: Can be moved easily across different work zones.

Adjustable Height & Span: Many models allow customization for specific tasks.

---

5. Increased Productivity

Efficient Material Handling: Reduces manual labor, speeds up lifting and transportation processes.

Multiple Operation Modes: Can be operated manually, by pendant control, or remotely, improving safety and control.

---

6. Enhanced Safety

Equipped with features like limit switches, overload protection, emergency stop systems, and anti-collision devices.

Reduces the risk of injury compared to manual handling of heavy loads.

---

7. Customizable Design

Can be engineered to fit specific site constraints, load types, and operational needs.

Add-ons like weatherproof covers, lighting, and walkways can enhance functionality.

 

 

Applications of Gantry Cranes

Gantry cranes are widely used across industries due to their versatility, mobility, and ability to handle heavy loads. Their design allows them to operate effectively in both indoor and outdoor settings.

---

1. Manufacturing & Fabrication Plants

Application: Handling heavy components, tools, and assemblies on production lines.

Example: Moving engines, molds, or metal structures during fabrication or assembly.

---

2. Construction Sites

Application: Lifting and positioning precast concrete elements, steel beams, or other structural materials.

Benefit: Eliminates the need for permanent lifting equipment on temporary construction sites.

---

3. Shipyards and Ports

Application: Loading and unloading cargo containers, ship parts, or engines.

Type Used: Often large-scale container gantry cranes or rail-mounted gantry cranes (RMGs).

---

4. Warehouses and Logistics Hubs

Application: Transporting bulky or heavy goods across storage areas.

Advantage: Improves material flow without needing a full overhead crane system.

---

5. Railway Yards

Application: Loading and unloading heavy rail components such as wheels, bogies, or containers.

Mobility: Often mounted on tracks for long-range operation along the yard.

---

6. Aerospace & Automotive Industry

Application: Lifting engines, fuselage sections, or automotive parts during maintenance or assembly.

Customization: Often equipped with precision control systems for delicate or valuable parts.

---

7. Power Plants and Heavy Industries

Application: Handling turbines, transformers, or large maintenance equipment.

Safety: Integrated with load monitoring and safety control systems.

---

8. Maintenance Workshops

Application: Used for maintenance of large vehicles, machinery, or heavy equipment.

Flexibility: Portable gantry cranes can be moved and adjusted as needed.

 

 

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%.