In the dynamic and ever-evolving landscape of industrial facilities in China, the efficient use of space and resources is paramount. This is where the underslung crane, also known as the underhung or under-running crane, plays a crucial role. Designed to maximize floor space and optimize material handling, underslung cranes are ideal for factories, warehouses, and workshops where traditional overhead crane systems may not be feasible.

This in-depth guide delves into the world of underslung cranes, exploring their unique design, operational benefits, and practical applications. Readers will gain insights into the key specifications, such as load capacities ranging from 0.5 to 10 tons and spans up to 25 meters, as well as the various working conditions these cranes can handle. You will learn how these cranes utilize the existing building structure, eliminating the need for support columns and thus freeing up valuable floor space for other uses.

The guide will also cover the structural features, including the optimal design of end beams, the

Single Girder Underslung Crane Manufacturers and …

Single Girder Underslung Overhead Crane: A Comprehensive Guide

Introduction

Single girder underslung overhead cranes are a specialized type of overhead crane designed to operate in environments with limited headroom. These cranes are ideal for workshops, warehouses, and other industrial settings where ceiling height is a constraint. Here is a detailed guide to their features, specifications, and applications.

Design and Construction

Main Girder

• The main girder of a single girder underslung crane is typically made from robust materials such as S355 or Q235B carbon structural steel. These materials ensure strength and durability while minimizing the overall weight of the crane[1][5].
• The girder can be either a rolled section or a torsion-resistant welded box girder, depending on the manufacturer and specific application[4].

End Carriage

• The end carriages are designed to be compact and lightweight, often made from the same high-strength materials as the main girder. They can be either hollow shaft or open gear type, with wheels made from alloy steel and proper heat treatment for enhanced durability[1][5].

Hoisting Mechanism

• Single girder underslung cranes can be equipped with low headroom hoists or standard room hoists, depending on the available headroom. These hoists are designed to maximize lifting height while minimizing the overall height of the crane[1][3].
• The hoisting mechanism often includes features such as dual lifting speeds and high-performance electric wire rope hoists that ensure smooth and efficient operation[5].

Technical Specifications

Lifting Capacity

• The lifting capacity of single girder underslung cranes typically ranges from 1 ton to 20 tons, although some models can handle up to 25 tons[1][3][5].

Span and Lifting Height

• The span of these cranes can vary from 3 meters to 39 meters, depending on the model and manufacturer. The lifting height can range from 3 meters to 30 meters or more, with some cranes offering adjustable lifting heights to fit different applications[1][3][4].

Speeds

• Lifting speeds can be dual, such as 0.8/5 m/min or 0.8/8 m/min, allowing for both slow and fast lifting operations.
• Trolley and crane traveling speeds are usually variable, ranging from 2-30 m/min, and are often controlled by VFD (Variable Frequency Drive) for smooth operation[1][3][5].

Control Methods

• Control methods include pendent control, remote control, and sometimes ground or cab control. The control panels are designed according to international standards like IEC and are typically housed in IP55 enclosures for protection[1][2][5].

Features and Benefits

Compact Design

• Single girder underslung cranes are designed to optimize headroom, making them ideal for installations where ceiling height is limited. They offer the highest possible hook position without requiring additional building height[1][4].

Low Noise and Easy Maintenance

• These cranes are engineered to be low-noise and easy to install and maintain. They often feature branding gear motors with IP55 protection, F insulation class, and IE3 energy efficiency, along with over-heat protection and electro-magnetic brakes[1].

Material and Surface Treatment

• The cranes are made from high-quality materials and undergo rigorous surface treatment, such as SA2.5 surface pre-treatment by blasting and C3-C5 painting system, to ensure durability and resistance to corrosion[1].

Applications

Industrial Workshops and Warehouses

• Single girder underslung cranes are widely used in various industrial settings, including machinery manufacturing, warehouses, logistics, food processing, paper making, and electronics industries. They are versatile and can handle a variety of material handling tasks efficiently[1][5].

Specialized Solutions

• These cranes can be customized with specialized accessories and components to meet specific application requirements. They are a good choice for special solutions where standard cranes may not fit due to space constraints[4].

Safety and Compliance

International Standards

• Single girder underslung cranes are designed and manufactured according to international standards such as FEM, CMAA, EN ISO, and others. This ensures compliance with safety and performance regulations[1][3][5].

Protection Grade

• The electrical components of these cranes are protected to IP54 or higher standards, ensuring they can operate safely in various environmental conditions[2][5].

Conclusion

Single girder underslung overhead cranes offer a practical solution for material handling in environments with limited headroom. With their compact design, high-performance capabilities, and adherence to international standards, these cranes are a valuable asset for any industrial setting. Understanding their technical specifications, features, and applications can help in selecting the right crane for specific needs.

Underslung Cranes Manufacturer In China

Guide to Underslung Cranes

Introduction

Underslung cranes, also known as underhung or under-running overhead cranes, are a type of overhead crane system that offers several unique advantages, particularly in terms of space utilization, maneuverability, and cost efficiency. Here is a comprehensive guide to help you understand the features, benefits, and applications of underslung cranes.

Design and Components

Basic Structure

• Underslung cranes operate with their hoist and trolley suspended from an elevated runway beam, typically attached to the ceiling or roof structure of a building. This design allows the crane to utilize the existing building structure without the need for additional support columns[2][4][5].

Key Components

• Hoist and Trolley: The hoist and trolley are suspended from the bottom flange of the bridge girder, enabling the crane to lift loads from underneath. This configuration is particularly useful for lifting heavy items in confined spaces[1][2][4].

Control Systems

• Underslung cranes often come with control panels that allow for remote operation, enhancing precision and accuracy when lifting and lowering heavy objects[1].

Benefits

Increased Maneuverability

• Underslung cranes offer greater flexibility and maneuverability compared to traditional bridge or gantry cranes. They are ideal for confined spaces or operations on uneven ground where regular track-mounted systems may not be suitable[1].

Reduced Costs

• The low installation requirements of underslung cranes result in substantial cost savings. They do not need supportive floor columns or extensive structural support, reducing both initial and maintenance costs[1][2][5].

Enhanced Safety

• Underslung cranes are generally considered safer because the lifting machinery is kept below the hook, allowing operators to work more safely and efficiently. The absence of a fixed structure also makes them less vulnerable to damage or theft[1].

Maximized Floor Space

• By being supported from the ceiling, underslung cranes free up floor space, reducing obstructions and improving overall facility safety and productivity[2][5].

Reduced Maintenance

• These cranes often require less regular inspection and maintenance compared to bridge and gantry cranes due to their simpler design and fewer structural components[1].

Specifications and Capacities

Lifting Capacity

• Underslung cranes typically have lifting capacities ranging from 0.5 tons to 10 tons, although some models can be customized to handle up to 16 tons[2][3][4].

Span and Lifting Height

• The span of underslung cranes can vary from 3 meters to 22.5 meters, and the lifting height can range from 6 meters to 30 meters, depending on the model and customization[2][3][4].

Working Class

• These cranes are usually classified under work duty classes A3 or A5, indicating their suitability for light to moderate service applications[2][3][4].

Applications

Manufacturing and Production Facilities

• Underslung cranes are frequently used in manufacturing and production facilities to move heavy parts or materials over short distances, especially in tight spaces[1].

Warehousing Operations

• They are useful in warehousing operations for transporting goods from one area to another without resorting to manual labor[1].

Construction Sites

• Underslung cranes can be used in construction environments to hoist materials quickly and efficiently across substantial heights[1].

Shipyards and Maintenance Facilities

• They are also effective in shipyards and maintenance facilities for moving large materials and equipment with minimal effort[1].

Installation and Considerations

Structural Evaluation

• Before installing an underslung crane, it is crucial to evaluate the structural strength of the facility’s roof to ensure it can support the crane’s load capacity. Additional supporting beams may be necessary to permit increased load capacity[5].

Customization

• Underslung cranes can be customized to fit specific facility needs, including unique span lengths, lifting heights, and load capacities. Manufacturers can design cranes according to European standards or other specifications as required[2][3][4].

Conclusion

Underslung cranes offer a versatile and efficient solution for material handling in various industrial and commercial settings. Their ability to maximize floor space, reduce costs, and enhance safety makes them an ideal choice for facilities where maneuverability and stability are critical. By understanding the design, benefits, and applications of underslung cranes, you can make an informed decision about whether this type of crane is suitable for your specific needs.

Single Girder Underslung Crane Suppliers …

Single Girder Underslung Crane: A Comprehensive Guide

Introduction

Single girder underslung cranes, also known as under-hung, under-running, or suspension cranes, are designed to optimize space utilization and are ideal for environments where supporting steel work is not feasible. Here is a detailed guide to help you understand the features, applications, and considerations for these cranes.

Key Features

Lifting Capacity and Span

• Single girder underslung cranes typically have a lifting capacity ranging from 1 to 10 tons, although some models can handle up to 16 or even 25 tons depending on the manufacturer and customization[1][2][5].
• The span of these cranes can vary from 3 to 25 meters, with some models extending up to 90 feet[1][2][4].

Traveling Speed

• The traveling speed of these cranes usually ranges from 20 to 30 meters per minute, with lifting speeds varying from 5 to 10 meters per minute[1][2][4].

Working Class and Ambient Temperature

• These cranes are often classified under working class A3 or A5, indicating their suitability for light to medium-duty applications[1][5].
• They can operate in ambient temperatures between -20°C and 40°C[1].

Design and Construction

• The main components include the main girder, cross beam, electric hoist, electric parts, and lifting mechanic devices[1].
• They are designed to be lightweight and compact, utilizing the existing ceiling structure to save floor space[1][2][4].

Applications

Optimal Space Utilization

• Single girder underslung cranes are perfect for factories and warehouses where maximum floor space is required. They run on tracks suspended from the roof or ceiling, eliminating the need for supporting floor columns[1][2][4].

Light Duty Material Handling

• These cranes are suitable for general use applications such as machinery assembly, warehouses, and environments without combustible, explosive, or corrosive substances[1][2][5].

Complex Building Conditions

• They are ideal for low buildings and complicated building situations where traditional top-running cranes may not be feasible[4].

Installation and Considerations

Building Structure

• It is crucial to ensure that the building structure is strong enough to support the weight of the underslung crane system and the rated load weight. If not, a freestanding overhead crane system may be an alternative, though it takes up valuable floor space[1][2].

Runway Beams

• The crane tracks are installed on the ceiling, and the roof structure must be able to withstand the load imposed by the crane. Careful sizing of the runway beams is necessary to avoid damage to the flanges[2][4].

Hook Height

• Due to the location of the runway beams on the upper side, the hook height is reduced, which can limit the lifting height available[2].

Customization and Optional Features

Custom Designs

• Many manufacturers offer customized underslung crane designs based on application conditions and customer needs[1][2][5].

Hoist Options

• These cranes can be equipped with CD1/MD1 type electric wire rope hoists, electric chain hoists, or manual chain pulley blocks[1][2].

Control Systems

• Control options include independent push button stations, radio remote control, and variable frequency drive (VFD) for precise control of lifting and traveling motions[2][4].

Additional Accessories

• Accessories such as travel limit switches, anti-loosening rope guides, and self-adjusting electric disk brakes can enhance the functionality and safety of the crane[4].

Advantages

Space Efficiency

• Single girder underslung cranes maximize the use of available building width and height, providing more floor space for production and other activities[1][2][4].

Flexibility and Ergonomics

• They offer greater flexibility and ergonomic solutions, making them ideal for environments requiring smooth production flow and safety[1].

Cost-Effectiveness

• These cranes are cost-effective as they utilize the existing ceiling structure, reducing the need for additional support columns and saving on installation costs[1][2][5].

Limitations

Load Capacity

• Generally, these cranes are limited to lighter loads, typically up to 10 tons, although higher capacities are available in some models[1][2][5].

Hook Height

• The reduced hook height due to the ceiling-mounted design can be a limitation in certain applications[2].

Load on Roof

• The load applied to the roof is higher compared to top-running cranes, requiring careful assessment of the roof’s structural integrity[2].

By understanding these features, applications, and considerations, you can make an informed decision when selecting a single girder underslung crane for your specific needs.

Overhead Cranes Manufacturer In China

Overview of Overhead Cranes

Overhead cranes, also known as bridge cranes or EOT (Electric Overhead Traveling) cranes, are common industrial equipment used in various settings such as factories, warehouses, and maintenance facilities.

Types of Overhead Cranes

Manual Single Girder Underslung Cranes

• Components: Bridge, trolley running mechanism, manual monorail trolley.
• Usage: Suitable for handling small amounts of load in powerless warehouses, workshops, or maintenance areas where efficiency and speed are not critical.
• Design: The bridge is made from a single girder using a tensioned chain drive and is installed to run above a longitudinal track.

Manual Double Girder Overhead Cranes

• Components: Trolley running mechanism, main girder, manual trolley, hand-pulled lifting mechanism.
• Usage: Mainly used in workshops or warehouses where electricity cannot be supplied.
• Design: Features a more robust structure compared to single girder cranes.

Electric Overhead Cranes

QD Heavy Duty Double Girder Overhead Cranes with Open Winch Hoist

• Components: Box-shaped bridge frame, hoisting trolley, large vehicle running mechanism, electrical control system.
• Operating Methods: Ground control, wireless remote control, and cabin control.
• Design Standards: Manufactured according to the latest national standards and international standards such as FEM, DIN, and IEC.
• Advantages: Reduced self-weight by 15-30% and maximum wheel pressure by 10-35%, lowering structural requirements and manufacturing costs.

European Top Running Double Girder Overhead Cranes with Wire Rope Hoist

• Features: Lightweight design, general-purpose usability, energy efficiency, environmental friendliness, maintenance-free operation, and high technological content.
• Usage: Suitable for a wide range of industrial applications due to its versatile design.

Specialized Overhead Cranes

Double Girder Overhead Cranes with Lifting Beams

• Types: Beams can be perpendicular or parallel to the main girder.
• Components: Hook installed below the beam for lifting heavy objects.
• Usage: Ideal for specific lifting tasks that require precision and stability.

QC Electromagnetic Overhead Cranes

• Components: Similar to overhead cranes with a lifting hook but equipped with a lifting electromagnet.
• Usage: Designed for lifting ferromagnetic metals and their products.

12.5-ton Electric Interlock Transfer Crane

• Purpose: Specialized for maintaining coal mills in power generation units.
• Working Conditions: Operates in ambient temperatures from -25℃ to +40℃ with a working classification of A3.

QN Slag Handling Overhead Cranes with Grab Bucket and Hook

• Lifting Capacities: 5/5, 10/10, and 16/16 tons.
• Components: Bridge frame, trolley traveling mechanism, hoisting mechanism, crane hook, crane grab bucket, and lifting electrical equipment.
• Usage: Designed for handling slag with a high working level of A6.

Explosion-Proof Overhead Cranes

LHB Explosion-Proof Double Girder Hoist Overhead Cranes

• Usage: Used in environments where explosive mixtures exist.
• Design: Similar to LH electric hoist double girder bridge cranes but with explosion-proof features.

QB Explosion-Proof Open Winch Double Girder Overhead Cranes

• Usage: Designed for working environments with explosive mixtures.
• Design: Structural form similar to ordinary double girder bridge cranes but with explosion-proof components.

Design and Manufacturing Standards

Overhead cranes are designed and manufactured according to various national and international standards, including FEM, DIN, and IEC. These standards ensure the cranes meet safety, efficiency, and performance requirements.

Installation and Operation

• Installation: Cranes are installed to run above longitudinal tracks or within specific structural constraints of the building.
• Operation: Can be controlled via ground control, wireless remote control, or cabin control, depending on the type and application.

Maintenance and Safety

Regular maintenance is crucial to ensure the longevity and safety of overhead cranes. This includes periodic inspections, maintenance of electrical and mechanical components, and adherence to safety guidelines to prevent accidents and injuries.

Underslung Traveling Single Girder Hoist Overhead Crane

Underslung Traveling Single Girder Hoist Overhead Crane: A Comprehensive Guide

Introduction

Underslung traveling single girder hoist overhead cranes are specialized lifting solutions designed to navigate complex building conditions, particularly in low-ceilinged or spatially constrained environments. Here is a detailed guide to these cranes, covering their specifications, features, and benefits.

Key Specifications

Capacity

• These cranes can handle loads ranging from 0.5 tons to 10 tons, with some versions capable of managing a Safe Working Load (SWL) of up to 10 tons, depending on the span[1].

Span

• The span of these cranes can extend up to 25 meters, making them versatile for various workshop and warehouse settings[1][2].

Work Duty

• The working class of these cranes can range from A5 to A7, adhering to FEM standards[1].

Max Lifting Height

• The maximum lifting height is up to 30 meters, which is particularly useful in environments where vertical space is limited[1].

Speed

• The lifting speed is typically 5/0.8 m/min with double speed functionality.
• Cross traveling speed ranges from 2 to 20 m/min, and long traveling speed ranges from 3 to 30 m/min, both controlled by Variable Frequency Drive (VFD)[1].

Design and Installation

Ceiling-Suspended

• The crane tracks are installed on the ceiling, which is ideal for low buildings and complex building conditions. This setup helps in optimizing the available space and reducing the need for additional structural support[1][2].

Optimal Space Utilization

• These cranes feature small side approach dimensions and custom main girder cantilevers to maximize the use of the available building width. This design ensures that the crane can operate efficiently even in tight spaces[1][2].

Hook Position Optimization

• The cranes allow for the highest hook position to be optimized by adjusting the main girder’s height between the end carriages. This flexibility is crucial for achieving the best possible lifting height within the constraints of the building[1][2].

Features and Accessories

Intelligent Functions

• These cranes have the option for smart functions with the crane control, contributing to more efficient operations. Features include real-time security monitoring and stable operation through frequency control[1].

Accessories and Components

• A comprehensive selection of accessories and components is available, enhancing the functionality and versatility of the cranes. These include various types of electric hoists, bridge end beams, and other specialized equipment[1].

Electric Hoist

• The electric hoist features a low headroom design, flexible drive, and high transmission efficiency. It includes a heavy-duty motor, self-adjusting electric disk brake, and high-strength galvanized steel wire rope[1].

Bridge End Beams

• The bridge end beams are designed with a modular direct drive, are lightweight, and have a small size. They feature self-lubricating wheels and self-aligning bearings for smooth operation[1].

Operational Benefits

Efficient Operation

• The cranes are equipped with frequency control for stable operation and real-time security monitoring to ensure safe transportation. The standardized configuration ensures stable performance even under heavy loads[1].

Space Efficiency

• The underslung design saves workshop room clearance by using H traveling channels, which are smoother than normal rails, thereby increasing the life of the crane wheels[1].

Customization

• These cranes can be customized to fit specific workshop requirements. They are suitable for various factories and can reduce the overall height of the factory, making them ideal for low-height plant and factory settings[1][4].

Safety and Reliability

Protection Devices

• The cranes come with various protection devices such as overload warning, secondary class anti-clamp, sound and light alarm devices, circuit self-check protector, and flow phase lack protection[4].

Insulation and Protection Class

• The electrical components have an insulation grade of Class F and a protection class of IP55, ensuring reliable and safe operation in various environmental conditions[1].

Conclusion

Underslung traveling single girder hoist overhead cranes are highly adaptable and efficient lifting solutions for complex and spatially constrained environments. With their ability to optimize space, customize to specific needs, and ensure safe and reliable operation, these cranes are a valuable asset for any workshop or warehouse. Their intelligent functions and comprehensive range of accessories further enhance their utility, making them a top choice for material handling in various industries.

China Wholesale Single Girder Underslung Crane … – YGCrane

Single Girder Underslung Crane: A Comprehensive Guide

Introduction

Single girder underslung cranes are specialized overhead cranes designed to operate in environments with limited headroom or complex building conditions. These cranes are ideal for light to medium material handling needs and offer several advantages over traditional overhead crane systems.

Key Characteristics

Design and Installation

• These cranes are typically installed under the roof or a self-supporting structure, making them perfect for buildings with low ceilings or restricted headroom[2][4][5].
• They are designed to utilize space efficiently, allowing for maximum hook height and optimal use of the existing building structure.

Load Capacity and Span

• Single girder underslung cranes can handle loads ranging from 0.5 to 10 tonnes, with some versions capable of managing up to 16 tonnes depending on the span[1][3][4].
• The span of these cranes can vary from 3 to 40 meters, accommodating various factory and warehouse layouts[1][3][4].

Working Duty and Temperature

• These cranes are classified under different working duties, such as FEM 2m to FEM A5, indicating their suitability for various operational conditions[1][4].
• They can operate in a wide range of temperatures, typically from -25°C to 50°C, making them versatile for different industrial environments[4].

Technical Specifications

Lifting and Traveling Speeds

• Lifting speeds can range from 1 to 10 meters per minute, with some models offering double-speed options for more efficient operation[1][2].
• Cross-traveling and long-traveling speeds can be adjusted using variable frequency drives (VFD), typically ranging from 2 to 50 meters per minute[1][2].

Control Methods

• Single girder underslung cranes can be operated using pendant line controls, radio remote controls, or a combination of both for enhanced flexibility and safety[2][5].

Safety Features

• These cranes are equipped with various safety features, including emergency limit switches, under-bridge lights, anti-collision systems, and real-time security monitoring[2][5].
• Advanced control systems may include lift motor overheat protection, brake pad thickness alarms, and cumulative lifting time and overload monitoring[1].

Components and Accessories

Electric Hoist

• The electric hoist is a critical component, often featuring low headroom designs, flexible drives, and high-strength galvanized steel wire ropes. These hoists are designed for high transmission efficiency and reliability[1].

Trolley and Bridge Drive

• The trolley and bridge drive systems use variable frequency motors, hardened gearboxes, and disc brakes for smooth and quiet operation. These systems are often semi-lubricated and maintenance-free[1].

Bridge End Beams

• The bridge end beams are designed to be flexible and adaptable, with modular direct drive designs and self-lubricating wheels for reduced noise and increased comfort[1].

Applications

Industrial Use

• Single girder underslung cranes are widely used in various industrial settings, including plants, warehouses, steel yards, and material stock areas. They are also applicable in industries such as oil, plastic, cement, power plants, mines, food, and chemical industries[4].

Maintenance and Small Workshops

• These cranes are particularly useful for maintenance purposes in confined spaces like small workshops, pumping stations, and other areas with limited headroom[5].

Advantages

Increased Safety

• By moving objects through the overhead space, these cranes avoid floor obstructions and reduce the risks associated with forklifts, such as imprecise stacking and accidents[5].

Improved Load Control

• Precision controls allow for exact placement of loads, minimizing human error and enhancing operational efficiency[5].

Ergonomic Benefits

• Overhead cranes reduce the strain on operators, lowering the risk of injury and worker fatigue. They also improve overall ergonomics by handling heavy lifting tasks[5].

Customizability

• These cranes can be easily customized with various Below-The-Hook accessories, such as lifting beams, spreader beams, and roll & coil lifters, to meet specific application needs[5].

Considerations for Purchase

Lifting Capacity and Height

• Determine the required lifting capacity and height based on the specific material handling needs of your facility[5].

Working Environment

• Consider the temperature range and working conditions where the crane will be operated. Ensure the crane is rated for the expected working duty and environmental conditions[4].

Power Supply

• Verify the voltage, frequency, and power supply requirements to ensure compatibility with your facility’s electrical infrastructure[5].

Special Functions

• Evaluate any special functions or intelligent features required, such as real-time security monitoring or advanced control systems[1].

By understanding these aspects, you can make an informed decision when selecting and installing a single girder underslung crane, ensuring it meets your specific material handling needs and enhances the efficiency and safety of your operations.

Single girder overhead crane, China underslung crane design

Guide to Chinese Single Girder Underslung Cranes

Overview

Chinese single girder underslung cranes are a type of overhead crane designed for light duty material handling, offering high safety, robust quality, good performance, and a durable working life. These cranes are particularly suitable for workshops and warehouses with limited floor space.

Key Components

Main Girder

The main girder is the primary load-bearing component of the crane, made from higher strength steel to ensure robustness and reliability.

End Carriages / End Trucks

These components move on the suspended track and are connected to the main girder. They are designed to support the crane’s operation without the need for additional floor columns.

Electric Hoist

The crane is typically equipped with CD1 or MD1 model electric wire rope hoists, which provide efficient lifting capabilities. These hoists are tested for dynamic and static loads, rise and drop pressures, and undergo a baking paint process to enhance paint film adhesion and appearance.

Electrical Components

The crane includes various electrical components such as the control system, motors, and other electronic parts that ensure safe and reliable operation.

Design and Installation

Underslung Crane Design

The underslung design allows the crane to be attached and supported by the roof supporting structure, eliminating the need for extra floor columns. This design is ideal for workshops with limited floor space, sloped ceilings, or multiple crane systems.

Installation Requirements

Before installation, it is crucial to ensure that the roof structure can withstand the weight of the crane and the load it will handle. Consultation with engineers is necessary to consider all details and avoid any inconvenience.

Technical Specifications

Lifting Capacity

The lifting capacity of these cranes ranges from 1 ton to 10 tons, making them versatile for various light duty applications.

Span

The span of the crane can vary from 3 meters to 16 meters, depending on the specific model and requirements.

Lifting Height

The lifting height can range from 6 meters to 30 meters, customizable according to the user’s needs.

Working Class

These cranes are classified under working class A3/A5, indicating their suitability for light to medium duty operations.

Ambient Temperature

The working environment temperature for these cranes is between -25°C and +40°C, with a relative humidity of ≤85%.

Operational Features

Compact Structure and Good Rigidity

The cranes have a compact structure and good rigidity, ensuring stable and reliable operation.

Easy Operation and Low Noise

They are designed for easy operation and produce low noise, enhancing the working environment.

Safety and Reliability

Equipped with safety features such as rubber buffers at the ends of the beam to avoid structural damage, these cranes prioritize safety and reliability.

Control Systems

The cranes can be equipped with pendant panels or remote control systems. However, due to safety reasons, these operating modes cannot be used simultaneously.

Applications

General Manufacturing

These cranes are widely used in general manufacturing, equipment assembly, machinery maintenance, parts exchanging, die handling, and other material loading and unloading tasks.

Warehouses and Workshops

They are ideal for warehouses and workshops where floor space is limited and maximum hook coverage is required.

Customization and Flexibility

Custom Designs

Customized underslung crane designs are available to meet specific application conditions and lifting requirements, ensuring safety and efficiency.

Peripheral Service

The girder overhangs can extend the travel range of the hoist trolley beyond the runways, allowing service to peripheral areas of the workshop.

Cost-Effectiveness

Reduced Costs

The underslung design reduces production, transportation, and construction costs associated with crane runway installation, making it a cost-effective solution.

Conclusion

Chinese single girder underslung cranes offer a robust, reliable, and cost-effective solution for light duty material handling in various industrial settings. Their ability to utilize ceiling space without requiring additional floor columns makes them an excellent choice for workshops and warehouses with limited floor space. Ensuring the roof structure can support the crane’s weight and consulting with engineers are crucial steps in the installation process to guarantee safe and efficient operation.

China Overhead Crane Manufacturer

Guide to Overhead Cranes

Introduction to Overhead Cranes

Overhead cranes are essential material handling systems used in various industrial settings, including factories, warehouses, and workshops. They are designed to lift, move, and place heavy loads efficiently, enhancing production and safety.

Types of Overhead Cranes

Single Girder Overhead Cranes

• Structure: Single girder cranes feature a single I-beam or girder that supports the load.
• Capacity: Typically range from 1 to 20 tons[2][5].
• Span: Usually span between 7.5 to 31.5 meters[1][2].
• Lifting Height: Can lift loads up to 6-30 meters[1][2].
• Speeds:
• Lifting speed: 0.8-5 m/min
• Hoist travelling speed: 2-20 m/min
• Crane speed: 3-30 m/min[2].
• Advantages: Lighter, easier to install, and less expensive compared to double girder cranes[5].

Double Girder Overhead Cranes

• Structure: Double girder cranes have two I-beams or girders that support the load.
• Capacity: Can handle heavier loads, typically ranging from 5 to 450 tons[1][2][5].
• Span: Span ranges from 10.5 to 31.5 meters[1][2].
• Lifting Height: Can lift loads up to 6-24 meters[1][2].
• Speeds:
• Lifting speed: 2.1-11.5 m/min
• Trolley speed: 27-40 m/min
• Crane speed: 42-75 m/min[2].
• Advantages: Greater lifting capacity, longer spans, and increased headroom under the crane[4][5].

Components of Overhead Cranes

Bridge Beam

• The bridge beam is the main structural component that spans the runway. For single girder cranes, it is typically a wide flange structural member. For double girder cranes, it can be either an I-beam or a box girder, which provides additional strength and stability[3][4].

Hoist/Trolley

• The hoist/trolley is the lifting mechanism that moves along the bridge beam. In single girder cranes, it is usually an under-hung style trolley. In double girder cranes, the hoist/trolley can be either under-hung or mounted atop the girders[3][4].

Runways

• Runways are the tracks on which the crane travels. They can be part of the building structure or a freestanding system. Top-running cranes are mounted on top of the runway beams, while under-running cranes are mounted below the runway beams[4][5].

Installation and Configuration

Top-Running Cranes

• Mounted on top of the runway beams, these cranes achieve greater lifting heights and are easier to install and service. However, they may not be suitable if facility headroom is a major issue[3][4].

Under-Running Cranes

• Mounted below the runway beams, these cranes are ideal when headroom is limited. However, they generally offer less lifting height compared to top-running cranes[4][5].

Work Class and Duty

• Overhead cranes are classified based on their work duty, which ranges from A3 to A7. This classification indicates the crane’s ability to handle different levels of usage and load cycles[1][2].

Customization and Special Requirements

• Overhead cranes can be customized to meet specific user requirements, including adjustments in lifting height, span, and temperature operating ranges. Special types like explosion-proof, grab cranes, and magnetic bridge cranes are also available[1][2].

Applications and Industries

• Overhead cranes are widely used in various industries such as automotive factories, paper mills, workshops, and warehouses. They are highly reliable and significantly enhance the efficiency of material handling operations[5].

Maintenance and Safety

• Regular maintenance is crucial to ensure the longevity and safe operation of overhead cranes. This includes routine inspections, lubrication, and replacement of worn-out parts. Safety features such as load limits, anti-collision systems, and operator training are also essential[2].

Conclusion

Overhead cranes are versatile and powerful tools that can significantly improve the efficiency and safety of industrial operations. Understanding the different types, components, and specifications of overhead cranes is essential for selecting the right crane for your specific needs. Whether you opt for a single girder or double girder crane, ensuring proper installation, maintenance, and operation is key to maximizing their benefits.

Double Girder Underslung Crane

Double Girder Overhead Cranes: A Comprehensive Guide

Introduction

Double girder overhead cranes are a robust and versatile solution for heavy-duty lifting applications. These cranes are characterized by their two parallel girders that support the bridge, offering superior strength, greater hook height, and the ability to handle heavier loads over longer spans.

Key Components and Design

Girders

The girders in a double girder crane act as the primary supporting beams, running perpendicular to the runways built into the building structure. These girders are typically made of robust materials and are designed to bear both dynamic and static loads, ensuring stability and durability.

End Trucks

Each girder is supported by an end truck on either side of the bridge. These end trucks facilitate the movement of the crane along the runways, allowing for smooth and efficient operation.

Trolley and Hoist

In a double girder crane, the trolley and hoist are usually placed on top of the girders or between them. This configuration significantly increases the hook height, enabling the lifting of taller and longer objects compared to single girder cranes.

Benefits of Double Girder Overhead Cranes

Load Capacity

Double girder cranes are designed to handle loads exceeding 15 tons, often up to 120 tons or more, depending on the specific model and configuration. This makes them ideal for heavy-duty applications where high load capacities are required[2][4][5].

Improved Hook Height

The placement of the trolley and hoist on or between the girders provides an extra 18-36 inches of hook height, which is crucial for lifting tall and bulky items within a work area[1][4][5].

Span Capabilities

These cranes can span longer distances due to the combined strength of the two parallel girders. This feature is particularly beneficial in large industrial settings where extensive coverage is necessary[2][4][5].

Additional Features

Double girder cranes can be equipped with various additional features such as service walks, operator cabs, lights, and auxiliary hoists. These features enhance the functionality and usability of the crane, making it more versatile for different applications[2][4][5].

Applications and Industries

Heavy-Duty Operations

Double girder cranes are commonly used in industries that require frequent lifting of heavy loads, such as steel production, mining, iron and steel production, railyards, and shipping ports[4][5].

Indoor and Outdoor Use

These cranes can be used both indoors and outdoors, making them suitable for a wide range of environments. They are often integrated into different building structures, whether new or existing[2][4].

Design Considerations

Top Running vs. Under Running

Double girder cranes can be either top running or under running. Top running designs provide the greatest hook height and are more common, but under running designs can also be used depending on the specific requirements of the application[1][4].

Building Support Structure

Due to the higher weight and complexity of double girder cranes, additional consideration must be given to the building’s support structure. This may include adding tie-backs or support columns to handle the deadweight of the crane[4][5].

Advantages

Greater Maximum Span and Capacity

Double girder cranes offer greater maximum spans and load capacities, making them suitable for heavy-duty lifting tasks[2][4][5].

Enhanced Safety and Efficiency

The ability to add multiple lifting points and specialized equipment enhances both the safety and efficiency of the lifting operations. Features like walkways and maintenance platforms also contribute to better maintenance and operational safety[1][4][5].

Disadvantages

Higher Cost

Double girder cranes are more expensive due to the complexity of their design and the additional material required. This higher cost includes not only the initial purchase but also potential additional costs for building support modifications[4][5].

Increased Complexity

The components of a double girder crane system are more complex, which can increase the overall cost and require more sophisticated maintenance[4][5].

Conclusion

Double girder overhead cranes are a powerful and flexible solution for industries requiring heavy-duty lifting capabilities. With their ability to handle high load capacities, provide greater hook heights, and span longer distances, these cranes are ideal for a variety of applications. However, careful consideration must be given to the design, building support, and additional costs associated with these cranes to ensure they meet the specific needs of your operation.

Underslung Overhead Travelling Crane Manufacturers and …

Guide to Underslung Overhead Travelling Cranes

Introduction

Underslung overhead travelling cranes are a type of overhead crane designed to maximize space utilization, particularly in environments where supporting steel work is not feasible or where optimum hook coverage is essential. Here is a comprehensive guide to these cranes, covering their key features, advantages, and applications.

Key Features

Lifting Capacity and Span

• Underslung cranes typically have a lifting capacity ranging from 1 to 10 tons, although some models can handle loads up to 16 tons[1][2][5].
• The span of these cranes can vary from 3 to 30 meters, depending on the specific model and application[1][2][5].

Working Class and Ambient Temperature

• These cranes are usually classified under working classes A3 to A5, indicating their suitability for light to medium-duty applications[1][2][5].
• They can operate in ambient temperatures ranging from -20°C to 40°C, and in some cases, up to -25°C to 40°C[1][2][5].

Traveling Speed and Lifting Height

• The traveling speed of underslung cranes can range from 2 to 30 meters per minute, with lifting speeds typically around 5/0.8 meters per minute for double speed configurations[2][5].
• The lifting height can be customized according to the requirements of the workspace but generally can reach up to 30 meters[2][5].

Control and Safety Features

• These cranes can be controlled via pendent line control, push button pendant, or fully remote radio control[4][5].
• They often come equipped with safety features such as overload warning, secondary class anti-clamp, sound and light alarm devices, and circuit self-check protectors[5].

Design and Installation

Ceiling-Suspended Tracks

• Underslung cranes are mounted on tracks installed on the ceiling, eliminating the need for supporting floor columns. This design optimizes the use of available floor space[1][2][3].

Main Girder and End Carriages

• The main girder can be adjusted in height between the end carriages to optimize the hook position, ensuring maximum hook coverage and efficient use of space[2][4].

Electric Hoist and Trolley

• These cranes are typically equipped with electric wire rope hoists or chain hoists, which are designed for low headroom and high transmission efficiency. The trolleys are small and can travel beyond the crane span through side jibs[1][2][5].

Advantages

Space Utilization

• Underslung cranes are ideal for low buildings and complex building conditions where traditional overhead cranes cannot be installed. They maximize the use of available building width and height[1][2][3].

Flexibility and Ergonomics

• These cranes offer greater flexibility and ergonomic solutions, allowing for smooth production flow and improved safety and accessibility. They are particularly useful in environments where floor-traveling vehicles and hoisting cranes are used simultaneously[1][3].

Customization

• Underslung cranes can be customized to fit specific application conditions and customer needs. This includes adjusting the main girder height, using different types of hoists, and incorporating various control systems[1][2][5].

Applications

General Use Environments

• These cranes are commonly used in machinery assembly, warehouses, and other general use applications where there are no combustible, explosive, or corrosive substances present[1].

Low Ceiling Buildings

• Underslung cranes are particularly beneficial in buildings with low ceilings, as they do not require additional headroom for the crane structure. This makes them ideal for low-height plant and factory settings[1][2][5].

Complex Building Conditions

• They are well-suited for navigating complex building conditions where traditional crane installations are not feasible. The cranes utilize the existing ceiling structure, ensuring no obstructions on the floor[1][2][3].

Considerations for Installation

Building Structure

• It is crucial to ensure that the building structure is strong enough to support the weight of the underslung crane system and the rated load weight. If this is not possible, a freestanding overhead crane system may be considered, although it will occupy more floor space[1].

Maintenance and Operation

• Regular maintenance is essential to ensure the longevity and safe operation of the crane. Features like self-lubricating wheels, self-adjusting electric disk brakes, and real-time security monitoring contribute to efficient and safe operations[2][5].

Conclusion

Underslung overhead travelling cranes are a versatile and efficient solution for material handling in various industrial settings. Their ability to optimize space, flexibility in design, and advanced safety features make them an excellent choice for environments where traditional crane systems are not feasible. By understanding the key features, advantages, and considerations for these cranes, users can make informed decisions to enhance their production processes and workspace efficiency.

Frequently Asked Questions (FAQs)

What is an Underslung Crane and Where is it Typically Used?

An underslung crane, also known as an underhung or under running crane, is a type of overhead crane designed to be supported from the existing building structure, typically from the ceiling or roof beams. This crane is ideal for facilities where floor space needs to be maximized and where the building height is inadequate to support a top-running overhead crane system. It is commonly used in fabrication shops, assembly lines, maintenance shops, and manufacturing facilities for light to moderate service.

What are the Key Features and Benefits of Underslung Cranes?

Underslung cranes are characterized by their ability to optimize space utilization. They are lighter than top-running systems and do not require runway support columns, thus freeing up the entire floor area for other uses. These cranes have small side approach dimensions and can be customized with main girder cantilevers to maximize the use of the available building width. They also offer optimized hook positions by adjusting the main girder’s height between the end carriages, ensuring efficient material handling even in narrow spaces.

What are the Load Capacity and Span Limits of Underslung Cranes?

Underslung cranes generally have a load capacity ranging from 0.5 tons to 10 tons, although some versions can handle up to 16 tons depending on the design and manufacturer. The span of these cranes can vary from 3 meters to 25 meters, with some models capable of covering spans up to 30 meters. The lifting height is typically up to 30 meters, making them suitable for a variety of industrial applications.

How Do Underslung Cranes Ensure Safe and Efficient Operation?

Underslung cranes are designed with safety and efficiency in mind. They often feature intelligent functions such as real-time security monitoring, frequency control for stable operation, and self-adjusting electric disk brakes for reliable and dustproof performance. The cranes are built with hardened surface flexible drives, compact structures, and standardized configurations to ensure stable performance. Additionally, they may include smart crane control systems to enhance operational efficiency.

What Are the Installation and Structural Requirements for Underslung Cranes?

The installation of an underslung crane requires careful consideration of the building’s structural integrity. The crane’s tracks are installed on the ceiling, so the building roof structure must be able to withstand the weight exerted by the crane and its load. Before installation, it is crucial to communicate with engineers to ensure that every detail of the crane system aligns with the building’s capabilities. The crane’s design, including the end beams and girder configuration, is tailored to optimize load distribution and ensure efficient material handling within the available space.