New Types Of Cranes

 

A double girder gantry crane is an advanced material handling solution designed for heavy-duty industrial applications. With its robust design and high load capacity, this crane is commonly used in open yards, warehouses, workshops, and ports.

Equipped with two girders, offering enhanced strength and stability.Suitable for handling heavier loads and wider spans compared to single girder models.Ideal for lifting heavy loads ranging from 5 tons to over 500 tons.The design ensures safe and efficient lifting operations.

Tailored to fit specific operational requirements.Wide spans and lifting heights available for diverse industries.Can be fitted with electric wire rope hoists, chain hoists, or winches, depending on the application.Anti-collision systems, overload limiters, emergency stop buttons, and fault diagnostics ensure safe operation.Made from high-strength steel, resistant to wear and tear.Suitable for harsh environments, including extreme temperatures, dust, and humidity.

4)Controlled via a cabin, remote control, or pendant, offering flexible and user-friendly operation.Smooth motion control ensures precise positioning.Modern motor technologies and intelligent energy-saving systems reduce operational costs.

Warranty：1 Year

Weight (KG)：2000 kg

Video outgoing-inspection：Provided

Machinery Test Report：Provided

Product name：Double Girder Overhead Crane

Color：Optional

Effectiveness：high efficiency

Capacity：1-20t

Type：Double beam

Operating speed：High speed operation

Stability：Anti-swing function

MOQ：1 Set

Lifting mechanism：Eliectric Hoist

Work Duty：A3-A4

 

 

1.Main beam

Functions of the Main Beam

1)Load Support:

Carries the weight of the load being lifted as well as the weight of the trolley and hoist.

Distributes the load evenly to the supporting legs or end trucks.

2)Guidance for Movement:

Acts as the path for the trolley or hoist to travel along the crane's span.

Provides a smooth and stable base for lifting and positioning tasks.

3)Connection to Supporting Structures:

Links with the crane legs or end trucks to form a unified, stable system.

4)Enhancement of Operational Precision:

Maintains stability during lifting and movement, ensuring precise positioning of loads.

Lifting System

Key Features of the Lifting System

1)High Load Capacity

The lifting system is designed to handle a wide range of loads, from several tons up to hundreds of tons, depending on the crane's specifications.

It is engineered to distribute the load evenly to prevent structural stress and maintain stability.

2)Smooth and Precise Operation

The hoisting system is designed to ensure smooth lifting and lowering of the load with fine control.

Variable Speed Drives allow for smooth acceleration and deceleration, reducing wear on components and improving safety.

3)Safety Features

Overload Protection: Prevents the hoist from lifting loads beyond its rated capacity.

Limit Switches: Prevent the hoist from lifting or lowering beyond safe limits.

Emergency Stop Mechanism: Provides a fail-safe to immediately stop the crane in case of emergency situations.

4)Energy Efficiency

Modern electric hoists and motors are designed for energy efficiency, reducing operational costs while maintaining powerful lifting capacity.

Many systems include regenerative braking to recover energy during deceleration.

5)Durability and Longevity

Made from high-strength materials like steel and aluminum, the lifting components are designed to withstand continuous operation and harsh conditions (such as high temperatures, dust, and humidity).

 

3.End carriage

Functions of the End Carriage

1)Support for Crane Operation

The primary function of the end carriage is to support the crane's main girder system, ensuring that the crane is stable during its operation.

It helps keep the crane system level while carrying heavy loads and ensures that the crane moves smoothly along its span.

2)Facilitates Crane Movement

The end carriage allows the crane to travel along its runway or rail system, enabling horizontal movement. This allows the hoist and trolley system to position the load with precision.

3)Distributes Load Evenly

The end carriages play a vital role in evenly distributing the weight of the crane and the load being lifted. This ensures that the entire system remains balanced and safe during operation.

4)Stability and Safety

The end carriage ensures the stability of the crane when it is in motion and when it is lifting a load. Properly functioning end carriages prevent sway, tilting, or sudden shifts that could lead to accidents or damage.

4.Crane travelling mechanism

Types of Crane Travelling Mechanisms

1)Motorized Travelling Mechanism

Most double girder gantry cranes use motorized end carriages to power the crane's horizontal movement. These motorized systems provide more control and efficiency, especially for cranes with larger loads.

2)Non-Motorized Travelling Mechanism

Smaller, lighter cranes may have manual or non-motorized travelling mechanisms where the crane is moved manually or with a winch. This system is more common in smaller-scale operations where the load requirements are less demanding.

3)Powered and Non-Powered Systems Combined

In some designs, the crane's travelling mechanism may feature powered end carriages for horizontal movement along with manual or semi-automated hoisting and trolley systems. This combines manual flexibility with the power of the motorized drive for movement.

5.Trolley travelling mechanism

1)The operator commands the traveling motors to rotate, initiating movement of the wheels along the rails.As the motor turns the wheels, the trolley moves horizontally along the girder.

2)The gearbox ensures that the motor's speed and torque are transmitted effectively to the wheels, allowing the trolley to travel at the desired speed.The control system ensures that the movement is smooth and precise, and any adjustments are made based on the load or operational requirements.The brakes hold the trolley in place when it reaches the desired location.

3)The trolley traveling mechanism in a double girder gantry crane ensures the precise and efficient horizontal movement of the hoist trolley along the crane's structure. This system enables the crane to position loads accurately and is vital for tasks such as container handling, port operations, and industrial lifting applications.

6.Crane wheel

Types of Crane Wheels

1)Solid Wheels:

These wheels are made from a solid block of steel and are commonly used in heavy-duty applications, such as gantry cranes. Solid wheels are durable and can handle high stresses, making them suitable for cranes that handle large and heavy loads.

2)Hollow Wheels:

In some cases, hollow wheels are used, where the interior is hollowed out to reduce weight without sacrificing strength. These wheels are lighter but still capable of handling heavy loads.

3)Flanged Wheels:

Flanged wheels are typically used on cranes to ensure proper alignment with the rails. The flange on the side of the wheel helps guide the wheel along the track, preventing derailment.

4)Polyurethane-Coated Wheels:

Some cranes, especially those used indoors or in environments where noise reduction is important, use polyurethane-coated wheels. These wheels reduce noise and provide a smoother ride, especially on smoother or more delicate surfaces.

7.Crane Hook

Maintenance and Inspection

Regular maintenance and inspection are critical to ensure the hook's reliability and safety:

1)Visual Inspections:

Check for cracks, deformations, excessive wear, or damage to the safety latch.

2)Load Testing:

Periodically test the hook under a test load (usually 1.25 times the SWL) to ensure it can handle its rated capacity.

3)Lubrication:

Ensure the swivel bearings are properly lubricated to allow smooth rotation.

4)Replacement Criteria:

Replace the hook if it shows signs of wear, deformation, or if the throat opening increases beyond acceptable limits.

5)Certification:

Keep the hook certified and compliant with safety standards such as FEM, DIN, or ISO.

Motor

Motor Components

1)Rotor and Stator:

The stator is the stationary part of the motor that generates a magnetic field.

The rotor is the rotating component that converts electrical energy into mechanical motion.

2)Cooling System:

Motors are equipped with cooling fans or fins to dissipate heat and prevent overheating during prolonged operations.

3)Gearbox Integration:

Motors are often paired with gearboxes to reduce speed and increase torque, especially for hoisting and crane traveling operations.

4)Control System:

The motor's operation is managed through a control panel, which allows the operator to adjust speed, direction, and braking.

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Sound and light alarm system & limit switch

1)Functions of the Sound and Light Alarm System

Operational Alerts:

Signals when the crane is lifting, lowering, or moving along the rails.

Collision Prevention:

Alerts personnel of the crane's presence to avoid collisions or accidents.

Emergency Situations:

Activates during emergencies such as mechanical failures, overload conditions, or power interruptions.

Worksite Safety Compliance:

Meets safety regulations and standards required for industrial crane operation.

2)Functions of the Limit Switch

Prevents Overtravel:

Stops the hoist, trolley, or crane from exceeding its maximum range of motion.

Protects Equipment:

Avoids damage to the crane and its components by ensuring operations remain within safe limits.

Enhances Safety:

Reduces the risk of accidents caused by overhoisting, overloading, or collisions.

Improves Precision:

Ensures accurate positioning of loads and controlled movement during operation.

10.Safety Devices

1. Overload Protection Device: Prevents the crane from lifting loads exceeding its rated capacity.

2. Limit Switches

Types and Functions: Prevents overtravel, collisions, and operational errors.

3. Emergency Stop System: Allows operators to immediately stop all crane operations in the event of an emergency.

4. Anti-Collision Devices: Prevents collisions between multiple cranes operating on the same runway or between a crane and fixed structures.

5. Rail Clamp and Storm Brakes:The rail clamp secures the crane to the rails when it is not in use, preventing movement due to external forces like wind.Storm brakes automatically engage during high wind conditions to stabilize the crane.

6. Buffer System: Absorbs the impact energy when the crane or trolley reaches the end of its travel path.

11.Control Mode

1. Pendant Control

Description:

A wired control unit connected to the crane by a cable or festoon system.The operator walks along with the crane while holding the pendant to operate it.

2. Remote Control

Description:

A wireless control system that uses radio signals to communicate between the remote and the crane.Allows the operator to control the crane from a safe distance.

3. Cabin Control

Description:

The operator controls the crane from an enclosed cabin mounted on the crane structure.The cabin provides a panoramic view of the work area for precise operations.

4. Programmable Logic Control (PLC) or Automated Control

Description:

A fully or partially automated control system where crane operations are pre-programmed and managed by a PLC system.The operator can set parameters like lifting height, speed, or travel distance, and the crane executes the tasks automatically.

12.Sketch

Main technical

 

 

1. Construction Industry

Application:

Used for lifting and moving heavy materials such as steel beams, concrete blocks, and construction equipment.Assists in assembling large structural components for bridges, buildings, and other infrastructure projects.

2. Steel and Metal Industry

Application:

Handles heavy steel coils, sheets, pipes, and billets in steel mills and processing plants.Moves molten metal containers or furnaces in foundries.

3. Shipbuilding and Marine Industry

Application:

Lifts and positions ship components like hull sections, engines, and large machinery during assembly.Handles containers, anchors, and other heavy loads at ports and shipyards.

4. Transportation and Logistics

Application:

Used in container yards for loading, unloading, and stacking shipping containers.Moves goods and equipment in large warehouses and logistics hubs.

5. Manufacturing Industry

Application:

Lifts and moves large machinery parts, molds, and production components in factories.Facilitates the assembly of heavy equipment in manufacturing plants.

 

 

1. Construction Industry

Application:

Used for lifting and moving heavy materials such as steel beams, concrete blocks, and construction equipment.Assists in assembling large structural components for bridges, buildings, and other infrastructure projects.

2. Steel and Metal Industry

Application:

Handles heavy steel coils, sheets, pipes, and billets in steel mills and processing plants.Moves molten metal containers or furnaces in foundries.

3. Shipbuilding and Marine Industry

Application:

Lifts and positions ship components like hull sections, engines, and large machinery during assembly.Handles containers, anchors, and other heavy loads at ports and shipyards.

4. Transportation and Logistics

Application:

Used in container yards for loading, unloading, and stacking shipping containers.Moves goods and equipment in large warehouses and logistics hubs.

5. Manufacturing Industry

Application:

Lifts and moves large machinery parts, molds, and production components in factories.Facilitates the assembly of heavy equipment in manufacturing plants.

6. Power Plants

Application:

Lifts and installs turbines, generators, and other heavy machinery in power plants.Assists in the maintenance of equipment in thermal, hydro, and nuclear power stations.

 

 

1. Requirement Analysis and Design

Collect customer requirements, such as lifting capacity, span, lifting height, working environment, and special features.Conduct a feasibility study and site analysis to determine the crane's specifications.Use advanced software (e.g., AutoCAD, SolidWorks) to create detailed designs and drawings.

2. Material Procurement

Source high-quality materials, such as structural steel, electrical components, motors, gearboxes, and wheels.Procure standard components like hooks, wire ropes, and safety devices from certified suppliers.

3. Steel Cutting and Processing

Cut steel plates and beams into required sizes using advanced cutting methods such as CNC plasma cutting or laser cutting.Perform bending, drilling, and shaping as per design specifications.

4. Welding and Assembly of Girders

Weld steel plates and sections to form the crane's main girders, end girders, and supporting structures.Use high-precision automatic welding machines for consistent and strong welds.Assemble the girder sections with stiffeners and reinforcements.

5. Machining and Component Fabrication

Machine key components like wheels, shafts, gearboxes, and couplings for high precision.Fabricate the trolley, including the hoisting mechanism and load block assembly.

6. Surface Treatment

Perform sandblasting or shot blasting to remove rust, scale, and contaminants from steel surfaces.Apply anti-corrosion coatings and paint layers, ensuring durability and weather resistance.

7. Electrical System Assembly

Assemble electrical components, such as motors, controllers, Variable Frequency Drives (VFDs), and limit switches.Install power supply systems, wiring, and safety devices (e.g., overload protection, alarms).

8. Final Assembly

Assemble the main components, including the double girders, end carriages, trolley, and hoist.Mount wheels, rail clamps, buffers, and other accessories.Install the cab, pendant control, or remote control system as per customer requirements.

9. Testing and Inspection

Perform static load tests (1.25x rated capacity) and dynamic load tests (1.1x rated capacity) as per standards.Test all motions, including lifting, lowering, trolley movement, and crane travel.Check safety devices, limit switches, and emergency stop systems.

10. Packing and Delivery

Disassemble the crane into transportable components if needed.Use protective packing materials to prevent damage during transit.

Arrange for transportation and logistics to the installation site.

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%.