A Deep Dive into Double Girder Overhead Crane Types and Innovations

Understanding Common Challenges in Selecting Double Girder Overhead Cranes

When it comes to heavy lifting in industrial applications, double girder overhead cranes stand out as a robust solution. However, potential buyers often encounter several challenges when selecting the right crane for their specific operational needs. Common questions may revolve around lifting capacity, span length, lifting height, and the specific features needed for unique applications. This article will address these concerns and provide comprehensive insights into the types, specifications, and innovations surrounding double girder overhead cranes, enabling you to make informed decisions.

What is a Double Girder Overhead Crane?

A double girder overhead crane, also known as a double girder bridge crane or double girder EOT (Electric Overhead Traveling) crane, features two parallel beams that provide superior lifting capabilities compared to single girder models. Because they are designed for heavy-duty applications, double girder cranes are comprised of more complex components, which can make them a more significant investment.

Core Components of a Double Girder Overhead Crane

Bridge Girders: The primary support structure that carries the weight of the load.
End Trucks: The parts that allow the crane to move along the runway.
Hoist Assembly: The mechanism responsible for lifting and lowering the load.

Double Girder Overhead Crane Types

LH Type Double Girder Overhead Crane With Hoist Trolley

Capacity: 5-32/5 tons
Span Length: 10.5-31.5 m
Lifting Height: 3-20 m
Work Duty: A3, A4
Rated Voltage: 220V – 690V, 50-60Hz, 3-phase AC
Operating Conditions: Temperature range of -25℃ to +50℃, relative humidity ≤85%

Specifications Table for LH type Double Girder Overhead Cranes

Capacity (t)	Span (m)	Lifting Height (m)	Lifting Speed (m/min)	Working Duty	Total Power (kW)	Price ($)
5	10.5-31.5	16	12.5/15.5	A5, A6	22.8-27.8	$15, 600 -$ 29,500
10	10.5-31.5	16	8.5/3.2	A5, A6	26.8-34.8	$17, 200 -$ 32,500
20	10.5-31.5	12/14	7.2/9.7	A5, A6	55.6-69.0	$25, 500 -$ 45,900
32	10.5-31.5	14/16	6.0/7.4	A5, A6	71.3-86.3	$36, 200 -$ 59,800

QD Type Double Girder Overhead Crane With Winch Trolley

Capacity: 5-800/150 tons
Span Length: 10.5-31.5 m
Lifting Height: 3-50 m
Work Duty: A5, A6
Rated Voltage: 220V – 690V, 50-60Hz, 3-phase AC
Operating Conditions: Temperature range of -25℃ to +50℃, relative humidity ≤85%

Specifications Table for QD-type Double Girder Overhead Cranes

Capacity (t)	Span (m)	Lifting Height (m)	Lifting Speed (m/min)	Working Duty	Total Power (kW)	Price ($)
5	10.5-31.5	16	12.5/15.5	A5, A6	22.8-27.8	$15, 600 -$ 29,500
10	10.5-31.5	16	8.5/3.2	A5, A6	26.8-34.8	$17, 200 -$ 32,500
50	10.5-31.5	12/16	5.0/6.1	A5, A6	93.5-110.5	$49, 500 -$ 72,000
100	13-31	18/20	3.1/3.9	A5, A6	136-174	$115, 000 -$ 166,700

For more detailed specifications, refer to SLKJCrane’s catalog of LH-type and QD-type double girder overhead cranes.

Innovative Solutions and Applications

Double girder overhead cranes not only serve general lifting needs but also adapt to various industrial scenarios thanks to their customizable configurations. Here are a few notable innovations and applications:

QE Double Trolley Metallurgical Crane

Application: Primarily for transporting scrap steel ladles in steel plants.
Specifications:
- Lifting Capacity: 320 tons + 80 tons
- Span: 21.5 m
- Lifting Height: 22 m
- Operating Duty: A7

Safety Features

This crane includes safety protocols like short circuit protection, overload protection, and an advanced control system to maintain unlifting stability.

QD Fully Automatic Unmanned Overhead Crane

Application: Designed for vanadium product factories, efficiently lifts and positions materials with minimal human intervention.
Specifications:
- Lifting Capacity: 4 tons
- Span: 13.5 m
- Lifting Height: 9 m
- Operating Mode: Fully automatic

Technical Innovations

Equipped with anti-sway control systems and real-time monitoring, this system ensures precise operations, enhancing overall efficiency and safety.

QC Upper Rotating Electromagnetic Crane

Application: Ideal for handling standard-length steel.
Specifications:
- Capacity: 12.5 tons + 12.5 tons
- Span: 31.5 m
- Lifting Height: 10 m
- Work Duty: A7

Special Features

Utilizes an electromagnetic beam for lifting while enabling horizontal rotation, making it especially useful in steel distribution centers.

Selecting the Right Double Girder Overhead Crane

When choosing between different types of double girder overhead cranes, consider:

Capacity Needs: Match the lifting capacity with your operational demands.
Span and Height Requirements: Ensure the crane can fit and operate within the required space.
Duty Cycle: Choose a crane that aligns with the work environment and frequency of operation.
Special Features: Evaluate any additional features that may enhance safety or operational efficiency based on your industry specifics.

Comparing Double Girder to Single Girder Overhead Cranes

Parameter	Single Girder Overhead Cranes	Double Girder Overhead Cranes
Lifting Capacity	1-32 tons	5-800 tons
Work Duty	A1-A5	A3-A8
Span Length	7.5-31.5 m	10.5-40.5 m
Lifting Height	6-20 m	12-28 m
Lifting Speed	0.32-8 m/min	0.63-63 m/min
Trolley Travelling Speed	3.2-40 m/min	10-63 m/min

Why Choose SLKJ Crane for Your Double Girder Overhead Crane Solutions?

At SLKJ Crane (www.slkjcrane.com), we pride ourselves on offering tailored solutions for all types of overhead cranes. Our team of specialists is equipped to help you navigate the complexities of crane selection, ensuring that you get the most reliable and efficient lifting solutions for your business needs. Our commitment to quality and safety means that we comply with all industry standards, ensuring that you receive a product that meets your operational requirements.

FAQ

If you are in the market for a double girder overhead crane or need expert advice tailored to your specific lifting requirements, don’t hesitate to reach out to us. Our dedicated team is here to assist you in selecting the ideal crane and ensuring its seamless integration into your operations.

What is the primary difference between a single girder and a double girder overhead crane?

What lifting capacities do double girder overhead cranes generally accommodate?

What are the common control modes available for double girder overhead cranes?

How do I determine the right span length for my double girder overhead crane?

The span length for a double girder overhead crane is typically determined by the structure of the building and the operational layout. You need to measure the distance between the runway beams where the crane will operate. The span must accommodate the distance and any additional clearance for lifting operations. Consult with a crane specialist to ensure you select the appropriate span length for your application's specific needs.

Can double girder overhead cranes be customized for specific applications?

What safety features should I look for in a double girder overhead crane?

How do I maintain a double girder overhead crane?

Regular maintenance is crucial for the longevity and safety of your double girder overhead crane. Recommended practices include:

Routine Inspections: Check for any wear or damage on cables, hooks, and other components.
Lubrication: Ensure that moving parts are well-lubricated to prevent friction and wear.
Load Testing: Perform load tests periodically to ensure the crane operates within its specified limits.
Electrical System Checks: Inspect wiring, control systems, and safety devices for proper functionality.
Documentation: Keep accurate records of all maintenance activities and inspections for safety compliance.

How can I contact SLKJ Crane for a consultation?

To discuss your crane needs or request a quotation, you can reach out to SLKJ Crane through our website at www.slkjcrane.com or call our dedicated customer service team directly. We are here to assist you with any inquiries you may have regarding double girder overhead cranes or other lifting solutions!

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