Double Trolley Overhead Crane

Product Introduction

The double trolley overhead crane is specifically engineered for handling extra-long, heavy, or irregularly shaped loads. Equipped with two independent or synchronized lifting trolleys on the same bridge structure, it provides superior load balancing and precise multi-point lifting where a single trolley falls short. The double trolley overhead crane offers customizable configurations to adapt to diverse workshop layouts and complex lifting requirements. Its coordinated dual-hoist system enhances lifting stability and operational safety, allowing smooth turning and positioning of large workpieces while maximizing handling efficiency. Additionally, the crane’s flexible design makes it ideal for handling specialized components, providing reliable adaptability for heavy industrial sectors. This double trolley bridge crane is perfect for industries like steel fabrication, precast concrete, shipbuilding, and machinery manufacturing.

Main Features of ZOKECRANE Double Trolley Overhead Crane

• Equipped with two lifting trolleys on one overhead crane bridge
• Suitable for long, heavy, large, or irregularly shaped loads
• Two trolleys can work independently or synchronously
• Strong double girder structure for heavy-duty operation
• Customized lifting capacity for each trolley
• Excellent load balancing and positioning ability
• Suitable for multi-point lifting applications
• Stable lifting, trolley traveling, and crane traveling performance
• Optional variable frequency control for smooth start and stop
• Optional synchronization control system for coordinated lifting
• Cabin control, wireless remote control, or pendant control available
• Suitable for heavy equipment manufacturing and steel structure handling
• Designed according to customer site layout and working conditions
• Multiple safety protection devices for reliable operation
• Easy maintenance and long service life
• Export packaging and international shipping support available

Common Types of Double Trolley Overhead Crane

Different projects require different double trolley crane configurations. ZOKECRANE can design and manufacture customized double trolley overhead cranes according to lifting capacity, load type, workshop layout, and operating requirements.

Typical Technical Parameters

The following parameters are for general reference. ZOKECRANE can customize double trolley overhead cranes according to project requirements, lifting capacity, load dimensions, span, lifting height, working duty, and site conditions.

Applications of Double Trolley Overhead Crane

Double trolley overhead cranes are widely used in industries requiring two lifting points, precise positioning, stable load balancing, or handling of oversized and irregular loads. They are especially useful where single-hook lifting is not safe or efficient.

Heavy Machinery Manufacturing

In heavy machinery manufacturing plants, double trolley overhead cranes are used for lifting large equipment frames, machine bases, gearboxes, pressure vessels, and heavy components. The two trolleys can share the load and support safer handling during assembly and maintenance.

Steel Structure Fabrication

For steel structure workshops, this crane is suitable for lifting long steel beams, welded structures, bridge sections, steel columns, and fabricated components. The double trolley design helps keep long materials balanced during lifting and transportation.

Precast Concrete Industry

Double trolley bridge cranes can be used for lifting precast concrete beams, slabs, molds, and large concrete components. Synchronized lifting helps reduce load tilting and improves handling safety.

Shipbuilding and Marine Engineering

In shipyards and marine engineering facilities, double trolley overhead cranes are used for handling hull sections, large steel plates, marine equipment, and assembled structures. The crane can support multi-point lifting for large and heavy components.

Power Equipment Manufacturing

For transformer plants, generator factories, and power equipment manufacturers, double trolley overhead cranes can lift large electrical equipment, transformer tanks, stator parts, and heavy assemblies.

Mold and Die Handling

In mold manufacturing and automotive industries, double trolley cranes can be used for lifting large molds, dies, fixtures, and tooling equipment. They provide stable and flexible lifting support for production and maintenance.

Bridge and Beam Handling

For long beams, bridge components, and structural parts, double trolley overhead cranes provide two lifting points to improve stability and reduce swing during movement.

Assembly and Maintenance Workshops

In large assembly workshops, double trolley overhead cranes help position heavy parts accurately and safely. They can be used for equipment installation, production line maintenance, and large component assembly.

Why Choose ZOKECRANE Double Trolley Overhead Crane?

Professional Crane Manufacturer

ZOKECRANE is operated by Henan Zoke Crane Co., Ltd., a professional lifting equipment manufacturer specializing in overhead cranes and gantry cranes. Our manufacturing base is located in Changyuan, Henan Province, one of China’s major crane production centers.

Customized Double Trolley Design

ZOKECRANE can customize the double trolley overhead crane according to lifting capacity, load dimensions, trolley spacing, working duty, workshop layout, lifting height, control method, and synchronization requirements. Whether the two trolleys need to operate independently or synchronously, ZOKECRANE can provide a suitable technical solution.

Reliable Structure and Stable Operation

The crane is designed with a strong bridge structure, reliable trolley mechanisms, and stable crane traveling systems. For heavy-duty lifting and frequent operation, reinforced structures and suitable working duty configurations can be provided.

Optimized Trolley Mechanism

Based on international customer requirements, ZOKECRANE continuously improves trolley mechanisms and crane structures to enhance operating stability, lifting efficiency, and maintenance convenience.

Advanced Control Options

Variable frequency control and synchronization control can be provided according to project requirements. These control systems help achieve smoother operation, better positioning accuracy, and safer coordinated lifting.

Strict Quality Management

ZOKECRANE has established a comprehensive quality management system and obtained ISO, CE, and SGS certifications. Quality control is applied throughout design, material selection, welding, machining, assembly, electrical installation, testing, painting, packaging, and shipment.

International Export Experience

ZOKECRANE products have been supplied to Russia, Uzbekistan, the Philippines, Bangladesh, Australia, Qatar, Tanzania, Singapore, Saudi Arabia, Brazil, Nigeria, and many other countries and regions. We understand export requirements and can provide professional support for overseas projects.

Technical Support and After-Sales Service

ZOKECRANE provides crane selection support, technical drawings, installation guidance, operation manuals, electrical drawings, spare parts suggestions, and after-sales service support for international customers.

Frequently Asked Questions About Double Trolley Overhead Crane

1. What is a double trolley overhead crane?

A double trolley overhead crane is an overhead crane equipped with two lifting trolleys on one bridge structure. The two trolleys can operate independently or together to lift, move, and position heavy, long, or irregularly shaped loads.

2. What is the difference between a double trolley overhead crane and a single trolley overhead crane?

A single trolley overhead crane has one lifting trolley and is suitable for general lifting operations. A double trolley overhead crane has two lifting trolleys, making it more suitable for long loads, large components, multi-point lifting, load balancing, and synchronized lifting operations.

3. Can the two trolleys work at the same time?

Yes. The two trolleys can be designed to work independently or synchronously. For large or long loads, synchronized lifting and traveling can help improve safety and stability. For different work areas, independent operation can improve lifting flexibility.

4. Can the lifting capacities of the two trolleys be different?

Yes. The two trolleys can be designed with the same or different lifting capacities according to the application. For example, a crane may be designed as 50/10 tons, 32/10 tons, 20+20 tons, or other customized combinations.

5. What types of loads are suitable for double trolley overhead cranes?

Double trolley overhead cranes are suitable for:

• Long steel structures
• Large machinery parts
• Heavy equipment
• Precast concrete components
• Shipbuilding sections
• Bridge beams
• Transformers
• Large molds
• Pressure vessels
• Irregularly shaped loads
• Loads requiring two lifting points

6. Is synchronization control necessary?

Synchronization control is recommended when the two trolleys need to lift one large load together. It helps maintain balanced lifting, reduce tilting, and improve operation safety. If the two trolleys are mainly used independently, synchronization control may not be necessary.

7. Can the double trolley overhead crane be customized?

Yes. ZOKECRANE can customize the crane according to customer requirements, including:

• Total lifting capacity
• Capacity of each trolley
• Span
• Lifting height
• Trolley spacing
• Traveling length
• Working duty
• Control method
• Lifting speed
• Trolley traveling speed
• Crane traveling speed
• Hook type
• Electrical system
• Safety devices
• Indoor or outdoor use
• Anti-corrosion or explosion-proof requirements

8. What control methods are available?

Common control methods include:

• Cabin control
• Wireless remote control
• Pendant control

For large-capacity or heavy-duty double trolley overhead cranes, cabin control or wireless remote control is commonly selected. Variable frequency control can also be used for smoother operation and better positioning.

9. What information should I provide for quotation?

To provide an accurate quotation, please provide the following information:

1. Required lifting capacity of each trolley
2. Whether the two trolleys need synchronized operation
3. Load type and load dimensions
4. Crane span
5. Lifting height
6. Traveling length
7. Working duty or daily working hours
8. Indoor or outdoor use
9. Power supply voltage and frequency
10. Control method
11. Special requirements for speed or positioning accuracy
12. Workshop or site drawings, if available
13. Destination country or port

10. What safety devices are included?

Common safety devices include:

• Overload protection
• Upper and lower limit switches
• Crane traveling limit switch
• Trolley traveling limit switch
• Emergency stop
• Buffer
• Anti-collision device
• Phase protection
• Voltage loss protection
• Warning light and alarm
• Synchronization protection, if required
• Wind protection device for outdoor cranes, if required

Export and Logistics FAQ for ZOKECRANE Double Trolley Overhead Crane

1. Can ZOKECRANE export double trolley overhead cranes overseas?

Yes. ZOKECRANE has supplied crane equipment to customers in Russia, Uzbekistan, the Philippines, Bangladesh, Australia, Qatar, Tanzania, Singapore, Saudi Arabia, Brazil, Nigeria, and many other countries and regions. We can provide export packaging, international shipping support, technical documents, and customs clearance documents according to customer requirements.

2. How is the double trolley overhead crane packed for export?

For export shipment, the main girders, end carriages, two trolleys, hoisting mechanisms, electrical cabinets, motors, reducers, cables, hooks, and accessories are packed according to sea transportation and long-distance delivery requirements.

Steel structures are usually wrapped, fixed, and marked properly. Electrical components, control cabinets, motors, reducers, hooks, and small parts are usually packed in wooden cases or export-standard packages.

3. Can the double trolley overhead crane be shipped by container?

Yes. Many double trolley overhead cranes can be shipped by container. For cranes with large spans, the main girders may be divided into sections to fit standard containers.

Depending on the crane size and weight, standard containers, open-top containers, flat rack containers, or bulk cargo shipment may be used.

4. What shipping methods are available?

Common shipping methods include:

• Standard container shipping
• Open-top container shipping
• Flat rack container shipping
• Bulk cargo shipping
• Land transportation
• Railway transportation
• Multimodal transportation

The suitable shipping method depends on crane span, girder length, trolley size, total weight, destination country, delivery schedule, and shipping cost.

5. What documents can ZOKECRANE provide for export?

ZOKECRANE can usually provide the following export and technical documents:

• Commercial invoice
• Packing list
• Bill of lading
• Certificate of origin, if required
• Product certificate
• Quality inspection report, if required
• CE documents, if required
• Operation manual
• Installation drawings
• Electrical drawings
• Packing drawings
• Spare parts list

The final document list can be prepared according to customer requirements and destination country regulations.

6. Can ZOKECRANE provide CE documents?

Yes. ZOKECRANE has obtained ISO, CE, and SGS certifications. CE-related documents can be provided according to customer and project requirements.

7. How long does production and delivery take?

Production and delivery time depends on crane type, lifting capacity, span, lifting height, trolley configuration, control system, electrical configuration, customization requirements, order quantity, and production schedule.

After confirming the technical requirements and commercial terms, ZOKECRANE can provide a clear production and delivery plan.

8. Can ZOKECRANE help arrange shipment to our destination port?

Yes. ZOKECRANE can assist with shipment arrangement to the destination port according to the agreed trade terms. Customers may also use their own freight forwarder.

9. What trade terms are commonly used?

Common international trade terms include:

• EXW
• FOB
• CFR
• CIF
• DAP

The final trade term can be selected according to customer requirements, destination, and logistics arrangement.

10. What should we check after receiving the crane?

After receiving the double trolley overhead crane, customers should check:

1. Package condition
2. Quantity of components
3. Main girder sections
4. End carriages
5. Trolley assemblies
6. Hoisting mechanisms
7. Hooks and lifting accessories
8. Motors and reducers
9. Electrical cabinets and control components
10. Cables and accessories
11. Nameplates and markings
12. Technical documents and drawings
13. Spare parts, if included

If any damage or missing parts are found, please contact ZOKECRANE promptly with photos, packing list, and shipping documents.