Eot Crane Girder

 

The Double Girder Overhead Crane is a premium material handling solution designed for heavy-duty industrial applications. With its robust double-girder design, it offers exceptional lifting capacity, stability, and precision, making it an indispensable tool for industries requiring efficient and reliable operations.

Suitable for lifting and moving heavy loads, ranging from 5 tons to over 500 tons.Engineered with high-strength materials to ensure durability and resistance to wear, even in demanding environments.The dual-girder structure ensures smoother movement, minimal vibration, and enhanced operational safety.Tailored to specific industrial needs with options for span, lifting height, and control systems (manual, wireless remote, or automated).Ideal for manufacturing, logistics, shipbuilding, steel production, and other heavy industries.

3)Function

Manufacturing Plants: Streamlining material handling processes.

Steel Mills: Efficient handling of heavy steel products and machinery.

Shipyards: Facilitates construction and assembly of large components.

Warehousing: Simplifies logistics and inventory management.

4)Why Choose Our Double Girder Overhead Crane?

Efficiency: Optimized design for maximum productivity.

Safety: Equipped with advanced features like overload protection, anti-collision systems, and emergency brakes.

Reliability: Guaranteed long-term performance with minimal maintenance.

Place of Origin：Henan, China

Warranty：1 Year

Weight (KG)：4500 kg

Video outgoing-inspection：Provided

Machinery Test Report：Provided

Lifting mechanism：Electric Hoist

Control method：Wireless Remote Control

Type：Double beam eot cranes

Power Source：3 Phase 380V 50hz

Crane type：2t electric overhead workstation bridge overhead crane components

Working Class：A5

Temperature：-20-40C

Work Duty：A3/A4/A5

Pictures & Components

 

1.Main beam

Features

1)High Load-Bearing Capacity:

The double girder design allows the crane to lift and transport heavier loads compared to single girder cranes.

2)Customization:

The main beam can be tailored in terms of length, width, and structure to suit specific application requirements.

3)Integrated Trolley Tracks:

The upper surface of the main beam is equipped with tracks for the trolley or hoist to move smoothly across the span.

4)Connection Points:

The ends of the beam are designed to connect securely with the end carriages, enabling seamless integration with the crane structure.

Lifting System

Components of the Lifting System

The lifting system is a combination of several interconnected parts working together:

1)Hoist or Trolley:

Mounted on the main girder, the hoist or trolley is the primary device for lifting and moving loads along the crane's span. In a double girder crane, a motorized trolley is typically used for heavier capacities.

2)Lifting Mechanism:

Electric Hoist: Most commonly used for small to medium loads.

Open Winch Mechanism: Preferred for larger loads and provides high precision.

3)Wire Rope or Chain:

Wire Rope: High-strength steel cables used for heavy-duty applications.

Chain: Typically used for lighter loads in certain industrial settings.

4)Lifting Motor:

A powerful motor drives the lifting mechanism, ensuring smooth hoisting and lowering. Motors often come with variable speed controls for precision.

5)Hook Block:

The hook block connects to the load and is designed to rotate and handle heavy-duty lifting efficiently.

6)Drum and Pulley System:

Wire ropes are wound around a drum and guided by pulleys to ensure balanced and smooth lifting operations.

 

3.End carriage

Structure and Design

1)Material and Construction:

End carriages are typically made from high-strength steel to support the entire weight of the crane and the load it carries. The design is robust to withstand dynamic loads, shocks, and vibrations during operation.

2)Frame:

The frame of the end carriage is built to be sturdy and stable, often in a box-like or I-beam shape, designed to distribute the crane's weight evenly to prevent any deformation.

3)Wheels and Axles:

The end carriage includes heavy-duty wheels mounted on axles, which run on the runway beams. The wheels are usually made from hardened steel or other durable materials for longevity and smooth operation.

4)Bearings and Bushings:

High-quality bearings ensure that the wheels run smoothly along the rail tracks. These components help minimize friction, reduce wear, and extend the life of the system.

4.Crane travelling mechanism

Functions of the Crane Traveling Mechanism

1)Horizontal Movement:

The primary function is to allow the crane to move along the runway, covering the full span of the working area. This enables the crane to position itself precisely above the load or to move the load to different areas of the facility.

2)Load Distribution and Balance:

By distributing the load evenly across the end carriages, the traveling mechanism ensures that the crane remains balanced and stable during movement, reducing the risk of tipping or instability.

3)Safety and Control:

The traveling mechanism includes advanced safety features such as overload protection, speed regulation, and braking systems to ensure the crane operates smoothly and safely during horizontal travel.

5.Trolley travelling mechanism

Types of Trolley Traveling Mechanisms

1)Single Drive Trolley:

A single motor on one side of the trolley drives the wheels to move the trolley horizontally along the girder. This is a more economical solution for lighter loads and smaller cranes.

2)Dual Drive Trolley:

In this design, two motors (one on each side of the trolley) drive the wheels for more balanced movement and better control, especially in larger cranes or for handling heavier loads. This setup is more common in higher-capacity cranes.

3)Electric Chain or Wire Rope Hoist:

The hoist used on the trolley can be either an electric chain hoist (for lighter loads) or a wire rope hoist (for heavier loads). Both are mounted on the trolley frame and enable vertical lifting and lowering of materials.

6.Crane wheel

Maintenance of Crane Wheels

Proper maintenance of the crane wheels is essential for ensuring the crane operates smoothly and efficiently. Some key maintenance practices include:

1)Lubrication:

Regular lubrication of the wheel bearings is necessary to minimize friction, reduce wear, and extend the lifespan of the wheels.

2)Inspection for Wear:

Regularly inspect the wheels for signs of wear or damage, such as flat spots, cracks, or deformation. If any damage is detected, the wheels should be replaced promptly to avoid further damage to the crane and rails.

3)Alignment:

Ensure the wheels are properly aligned with the rail system. Misalignment can cause uneven wear and result in inefficient crane movement.

7.Crane Hook

Design Features of the Hook

1)Material:

Crane hooks are typically made from high-strength steel or alloy steel to withstand the heavy loads they are required to lift. The steel is often heat-treated to provide higher strength and durability, ensuring that the hook can withstand the stress and impact of heavy lifting.

2)Shape:

The hook typically has a curved or "U" shape to securely hold the load. The shape allows for easier attachment of lifting slings and chains, ensuring that the load is stable and balanced during the lift.

3)Throat Opening:

The throat opening of the hook is the gap where the lifting sling or chain is attached. It must be designed to accommodate various types of slings or chains and be large enough to handle the intended load. Proper sizing is crucial to prevent slippage and ensure secure lifting.

4)Load Capacity:

Hooks are designed to handle specific load capacities. The capacity depends on the material, size, and shape of the hook. It's essential to match the hook's capacity with the load requirements to avoid overloading, which could lead to failure.

Motor

Key Components of the Motor System

1)Motor Housing:

The motor housing is a protective casing that encloses the motor components. It is designed to protect the motor from external elements like dust, moisture, and mechanical damage.

2)Rotors and Stators:

The rotor (moving part) and stator (stationary part) work together to generate motion in the motor. The rotor turns within the stator's magnetic field, creating mechanical energy that drives the crane's components.

3)Bearings:

Bearings support the rotating parts of the motor and ensure smooth operation. High-quality bearings reduce friction and wear, enhancing the motor's lifespan and performance.

4)Brushes and Commutators (in DC motors):

In DC motors, brushes and commutators are used to reverse the direction of the current in the windings, which in turn generates rotational motion. Regular maintenance is required to ensure that brushes are in good condition.

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Sound and light alarm system & limit switch

1)Sound and Light Alarm System

Function

The Sound and Light Alarm System is designed to alert workers in the vicinity of the crane's operation, especially during movements such as lifting, lowering, or traveling. These alarms help prevent accidents by notifying personnel of potential dangers in real time.

2)Limit Switches

Function

Limit switches are safety devices installed on a crane to control and limit the movement of various components, such as the hoist, trolley, and bridge. Their purpose is to prevent over-travel, collisions, or other unsafe conditions during crane operation.

10.Safety Devices

1. Overload Limiter

The overload limiter is designed to prevent the crane from lifting loads that exceed its rated capacity. If the load exceeds the crane's maximum load limit, the overload limiter will stop further hoisting, alert the operator, and prevent any damage to the crane's lifting system.

2. Limit Switches

Limit switches are used to restrict the movement of various crane components to prevent over-travel, over-hoisting, or collision with other structures. Limit switches automatically stop the crane when it reaches predefined positions.

3. Anti-Sway System

The anti-sway system minimizes the swinging of the load during movement, improving load control and operator safety. This system is especially useful for overhead cranes used in environments where precise load positioning is critical.

4. Emergency Stop Button

The emergency stop button is a safety feature that allows operators to immediately stop all crane movements in case of an emergency. This is a critical feature for avoiding accidents or damage when an unexpected issue arises during operation.

5. Sound and Light Alarm System

The sound and light alarm system alerts nearby personnel to the crane's movements, particularly when the crane is lifting, lowering, or moving horizontally. The alarm system enhances safety by warning workers of the crane's operation in real-time.

11.Control Mode

1) Pendant Control (Wired Control)

Pendant control involves a handheld control station connected to the crane via a cable. The operator uses this device to control the crane's movements by pressing buttons or toggling switches.

2)Radio Remote Control (Wireless Control)

Radio remote control systems use wireless signals to allow operators to control the crane from a distance using a portable transmitter. This control mode enhances mobility and flexibility for crane operators.

3. Cabin Control (Operator Cabin)

In this control mode, the operator controls the crane from an enclosed cabin mounted on the crane. The cabin is usually located at the bridge or on the trolley, providing a direct line of sight for the operator to view the load and the crane's operation.

4. Dual Control Mode (Combination of Control Types)

In dual control mode, the crane can be operated both from the operator cabin and by remote control (pendant or wireless). This system provides flexibility, allowing the operator to choose the most convenient control mode depending on the situation.

5. Automatic Control (Automated Systems)

Some modern Double Girder Overhead Cranes are equipped with automatic control systems that allow the crane to perform certain tasks without continuous operator input. This can be useful in specific applications like material handling, assembly lines, or automated warehouses.

12.Sketch

Main technical

 

 

1. Increased Lifting Capacity

Higher Load Capacity:

A Double Girder Overhead Crane typically has a higher load-bearing capacity compared to single girder cranes. The dual girder design allows for the distribution of the load across two beams, which enables the crane to handle heavier loads (often up to 100 tons or more).

2. Greater Span and Height

Wider Span:

The two-girder design allows for a wider span (distance between supports) than a single girder crane. This makes it suitable for large facilities with wide working areas

3. Enhanced Stability and Safety

Stability under Heavy Loads:

The double girder configuration makes the crane more stable, particularly when lifting heavy loads. This reduces the risk of sway, tipping, or instability during operation.

4. More Efficient Use of Space

Optimized for Large Areas:

The ability to span wide distances and operate in large, open areas makes double girder cranes ideal for warehouses, factories, and shipping yards where space is at a premium.

5. Smooth and Precise Operation

Higher Precision in Load Handling:

Double girder cranes often come with more advanced hoisting and control systems, allowing for precise and smooth movements of the load. This is especially important for sensitive materials or intricate assembly processes.

6. Adaptability to Different Environments

Flexibility in Design:

Double girder cranes can be customized for a wide range of environments, including indoor and outdoor applications, high-temperature areas, or locations where dust, chemicals, or other harsh conditions exist.

 

 

1. Heavy Manufacturing

Steel Mills & Foundries:

Double girder cranes are extensively used in steel mills, foundries, and other heavy manufacturing plants for handling molten metal, steel billets, heavy machinery, and raw materials. Their high lifting capacity and ability to span wide distances make them perfect for handling large, heavy loads in these environments.

2. Shipping & Port Operations

Container Handling:

In ports and shipping yards, double girder cranes (often called gantry cranes) are used for unloading and loading containers from ships. Their high lifting capacity and wide spans allow them to handle large, heavy shipping containers and ensure fast, efficient cargo handling.

3. Construction Industry

Heavy Lifting on Construction Sites:

Double girder cranes are used on construction sites for lifting and placing heavy materials like steel beams, concrete panels, and other structural components. They are particularly useful in large-scale construction projects such as bridges, buildings, and industrial plants.

4. Power Plants and Energy Sector

Coal Handling:

In coal-fired power plants, double girder cranes are used for handling coal and other bulk materials. They help with loading, unloading, and transporting these materials to and from storage areas and boilers.

5. Warehousing and Logistics

Material Handling in Warehouses:

Double girder cranes are used in large warehouses and distribution centers to handle heavy pallets, equipment, or raw materials. They can move goods over long distances across wide storage areas, increasing operational efficiency.

6. Heavy Equipment Handling

Machine Shops and Fabrication Plants:

In machine shops and fabrication plants, double girder cranes are used for lifting and moving heavy equipment, machinery, and materials. They can handle large presses, lathes, welding machines, and other fabrication tools.

 

 

1. Design stage: Understand the specific needs of customers, including load-bearing capacity, span, height and use environment. Carry out preliminary design according to the needs and draw scheme drawings, including structural design, power system and control system design. Carry out structural strength, stability and dynamic analysis to ensure that the design meets relevant standards and specifications.

2. Material preparation: Select suitable materials according to design requirements, such as high-strength steel, aluminum alloy, etc., to ensure good mechanical properties and durability. Purchase the required raw materials and components according to the design drawings, including motors, reducers, hooks, control systems, etc.

3. Processing and manufacturing: Cut the steel and process the main beam, end beam and other structural parts according to the design dimensions. Connect the cut parts by welding to form the main structural frame of the crane. Finish the welded components, including drilling, turning and milling, to ensure the matching accuracy of each component.

4. Assembly: Preliminary assembly of the processed components to check the stability and matching of the structure. Install the lifting mechanism, trolley running mechanism and trolley running mechanism to ensure that all moving parts can run smoothly.

5. Electrical system installation: Install motors, inverters, control panels and other electrical components to ensure that the electrical system is connected correctly. Arrange the cable lines reasonably to ensure safety and beauty, and reduce interference and wear.

6. Commissioning and testing: Test the various functions of the crane, including lifting, moving, braking and alarm systems, to ensure that all functions are normal. Carry out safe load tests to ensure that the crane operates stably under maximum load and meets safety standards.

7. Inspection and quality control: Carry out quality inspections on each link of production to ensure that all components meet design and standard requirements. Carry out qualification certification according to relevant regulations to ensure that the equipment meets national and industry standards.

8. Delivery and installation: Transport the manufactured crane to the customer site. Install it at the customer site, including fixing the foundation, commissioning and connecting the power supply. Provide operation training to customers to ensure that they can use the equipment safely and effectively, and officially deliver it for use.

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%.