Dual trolley explosion-proof bridge crane
Related Parameters Display
| Parameter | Specification | Remarks |
| Rated Lifting Capacity | 20+20t (customizable) | Dual trolley separate/cooperative operation, max customizable to 50+50t |
| Span | 10m – 35m | Extended on request for large industrial workshop |
| Lifting Height | 6m – 30m | Low headroom design optional for limited clearance workshop |
| Explosion-proof Grade | Ex d IIB T4 | Customizable to Ex ia IIC T6 for high-risk gas environment |
| Control Mode | Cabin/ground handle/wireless remote/PLC linkage | Wireless control distance ≥150m, English-Chinese mark |
| Dual Trolley Core Technology | Encoder, CI card frequency converter | High synchronization for cooperative operation |
| Working Class | A4 – A6 | Suitable for intermittent heavy-duty operation in hazardous area |
| Lifting Speed | 1m/min – 8m/min | Stepless speed regulation for precise hoisting |
| Crane Travel Speed | 10m/min – 30m/min | Anti-rail gnawing, stable operation for heavy load |
| Trolley Travel Speed | 8m/min – 25m/min | Independent speed control for single trolley |
| Lifting Device | Hook / special spreader | Customizable for different material hoisting |
| Power Supply | 380V/50Hz; 220V-660V/60Hz | Customizable for overseas power grid |
| Protection Level | IP55 (IP65 optional) | Dust-proof, anti-corrosion for chemical/petroleum environment |
| Working Temperature | -25℃ ~ 50℃ | Anti-rust, anti-static, anti-salt spray treatment |
| Structural Feature | Heavy-duty modular assembly | High-strength steel main beam, uniform load distribution |
| Certification | National explosion-proof & crane standard | Assist in ATEX/IECEx/CE/GOST/ISO9001 application |
Henan Mine Crane manufactured Clean Dual trolley explosion-proof bridge crane Product Introduction
Henan Mine Crane QBE double trolley explosion-proof overhead travelling crane is a large tonnage of special explosion-proof double girder lifting equipment developed specifically for flammable and explosive places, Henan Mine Crane in the large tonnage explosion-proof double girder field of the core benchmark products.
This double trolley explosion-proof double girder crane combines intelligent control technology and explosion-proof safety technology, the core carrying encoder, CI card inverter and other advanced components to create a double trolley operation system, to achieve independent operation of a single trolley, double trolley flexible switching of the joint operation to meet the needs of 1-50 tons of material lifting!
It is suitable for large-tonnage and high-risk environment lifting needs in global chemical and petroleum industries, and is the preferred equipment for heavy material handling in overseas high-risk scenarios.

Dual trolley explosion-proof bridge crane
1. Product core positioning and design standard
The core positioning of QBE double trolley explosion-proof overhead travelling crane is to provide large tonnage, flexible and high safety explosion-proof lifting solutions for overseas chemical, petroleum and other flammable and explosive places, targeting at the pain point of large tonnage material lifting in high-risk environments, and innovatively adopting the double trolley design to solve the problems of lack of flexibility and low operating efficiency of large tonnage lifting of traditional single trolley explosion-proof cranes, which is suitable for intermittent material handling in the industries of petroleum refining, chemical synthesis, large-scale pharmaceuticals and so on. It is suitable for the intermittent and repetitive heavy material handling operation rhythm of global petroleum refining, chemical synthesis, large pharmaceutical and other industries.
2. Core structure design
The whole machine structure is designed around the three core requirements of double trolley intelligent operation, full-dimension explosion-proof and multi-mode control. It is a large-tonnage modular assembly structure, with the core consisting of three key parts, and the structures work together to realize large-tonnage, flexible and safe lifting under flammable and explosive environments:
2.1 Double trolley intelligent operation mechanism: the whole machine is equipped with double trolley independent operation system, the core is equipped with encoder, CI card inverter and other advanced technology components, double trolleys can independently complete the light and medium-sized material lifting, but also can be synchronized with joint operations to undertake large tonnage of heavy materials handling, high synchronization and accurate positioning.
2.2 Full-dimensional explosion-proof protection structure: double explosion-proof treatment of mechanical and electrical systems, explosion-proof sealing of key mechanical components, anti-static spark suppression design, eliminating friction, collision spark hidden danger.
2.3 Multi-mode control and operation mechanism: Equipped with diversified control system, it supports four modes of driver’s room operation, ground handle control, wireless remote control and PLC linkage control, which can be flexibly switched according to the operation scenarios: the driver’s room operation is suitable for large-tonnage and long-distance precision lifting; the wireless remote control is suitable for remote operation in high-risk areas.
2.4 Large tonnage bearing structure: the main beam is made of high-quality high-strength steel welded to shape, after non-destructive testing and stress relief treatment, with strong bearing capacity and good deformation resistance.
3. Core product advantages
As a large tonnage explosion-proof overhead travelling crane specially designed for flammable and explosive places, its core advantages are centered on flexible operation of double trolleys, adaptation of multiple control modes, double explosion-proof safety, and high-efficiency large tonnage lif ting, which perfectly meet the operation and procurement pain points of overseas chemical and petroleum customers, and are also its core highlights distinguishing it from the traditional single-trolley explosion-proof overhead travelling cranes:
3.1 Dual trolley separate/joint operation, suitable for multi-tonnage lifting demand: dual trolley equipped with encoder + CI card inverter precision control, light and medium-sized materials can be a single trolley independent operation, improve lifting efficiency.
3.2 Four major control modes to adapt to different high-risk operation scenarios: covering the whole control dimension from manual to intelligent, driver’s room operation to meet the refinement of lifting, ground handle to adapt to close-range operation, wireless remote control to allow operators to complete the lifting of high-risk environments in the safety zone, PLC linkage control can be docked to the workshop automation production line, multi-mode switching seamlessly to adapt to the workflow and automation needs of different overseas customers.
3.3 Mechanical + electrical double explosion-proof, build a strong safety line of defense in high-risk environments: Mechanical key components to do explosion-proof sealing, anti-static treatment, the electrical system of the full explosion-proof design, without any spark generation point, in full compliance with the gas, dust, flammable and explosive environment of the operational requirements, the safety and reliability of the equipment operation is far more than the traditional one-dimensional explosion-proof cranes, from the root to avoid the risk of explosions, fire safety.
3.4 Large tonnage and high stability, high efficiency and long service life: high-strength main girder and end girder structure to protect the stability of large tonnage lifting, double trolley load sharing to make the equipment components more uniform force, reduce mechanical wear and tear, low failure rate of the whole machine.
3.5 Modular design, convenient installation and later expansion: the whole machine adopts modular assembly structure, the main beam, end beam, double trolley can be independently disassembled and assembled, on-site installation without the need for complex welding procedures, while according to the customer’s subsequent operational needs, upgrade the control mode, replace the special spreader, the equipment is very strong scalability and reusability, to match the capacity of overseas customers to upgrade their needs.

Explosion-proof double girder crane with two trolleys
4. Overseas adaptability and core application scenarios of the product
4.1 Core application scenarios: This chemical and petroleum double trolley explosion-proof crane is widely used in various kinds of flammable and explosive overseas operations with large tonnage lifting requirements, including petroleum refining workshops, chemical raw material production bases, natural gas storage and transportation warehouses, large-scale pharmaceutical workshops, dusty heavy processing workshops, etc., and it can be responsible for lifting, loading, unloading, shifting and transporting large-tonnage materials, such as large reaction kettles, storage tanks, heavy-duty pharmaceutical equipment, and chemical raw material packages, and so on. It is capable of lifting, loading, unloading and shifting large-tonnage materials such as large reactor, storage tank, heavy pharmaceutical equipment and chemical raw material package;
4.2 Overseas standard and power grid adaptation: the product complies with China’s national explosion-proof safety standards and bridge crane industry standards, and the core explosion-proof components are compatible with mainstream explosion-proof certification systems such as EU ATEX and international IECEx, which are perfectly adapted to the needs of power grids in different overseas regions.
4.3 Overseas environment adaptation: the surface of the whole machine is professionally treated with anti-rust, anti-corrosion and anti-static treatment, which can be adapted to the corrosive environment of overseas petrochemical workshops, the high humidity and salt spray environment of the coastal storage area, and the dusty environment of the dusty workshop, which can effectively prevent the equipment from malfunctioning due to the environmental factors, and greatly improve the service life of the equipment in the harsh environment overseas;
4.4 Installation and Operation Adaptation: Modular assembly design allows the equipment to adapt to different specifications of overseas industrial plants, the span and lifting height can be customized according to the actual size of the plant, the installation process does not require large-scale special equipment, manually with the conventional lifting tools can be completed; multi-control modes to adapt to the operating habits of different operators overseas, the Chinese and English bilingual operating interface can be started without additional training.
5. Overseas exclusive supporting services
Henan Mine Crane, as a professional manufacturer of large-tonnage explosion-proof cranes, provides a full range of exclusive ancillary services for the use of large-tonnage explosion-proof equipment for overseas customers, completely eliminating the procurement, installation and maintenance concerns of overseas customers:
5.1 Data support: Provide a full set of English technical data, including explosion-proof test reports, installation drawings, multi-mode operation manuals, maintenance manuals, parts manuals, all data are in line with international explosion-proof standards, to facilitate overseas customers for local equipment access procedures and operator training;
5.2 Installation guidance: equipped with 7 * 24 hours overseas remote video installation guidance, technicians are qualified to install large-tonnage explosion-proof cranes, real-time answers to the explosion-proof installation specifications, double trolley debugging points and other issues, but also according to customer needs to arrange for professional and technical personnel door-to-door installation and commissioning, the cost of transparent can be negotiated;
5.3 Spare parts guarantee: there are spare parts agents in Malaysia, Germany, Russia and other overseas chemical and petroleum industry concentrated areas, double trolley encoder, CI card inverter, explosion-proof motors, brake pads and other commonly used wearing parts are original specifications, overseas customers can be shipped to the neighboring countries within 72 hours of placing an order, to ensure that the spare parts are supplied in a timely manner.
5.4 After-sales technology: open 7 * 24 hours English after-sales hotline, equipped with professional large-tonnage explosion-proof crane technical engineers, can provide remote explosion-proof fault diagnosis, double trolley system debugging and other solutions, complex faults can be arranged for overseas outlets of professional and technical personnel door-to-door processing, to minimize equipment downtime losses.
What Can Henan Mine Crane Clean explosion-proof bridge crane Offer You?
| Value Category | Specific Benefits | Description |
| Hoisting Flexibility | Dual trolley separate/cooperative operation; multi-tonnage adaptation | One crane meets light/heavy load hoisting needs, no need to purchase multiple devices |
| Operational Adaptability | Four control modes; PLC linkage control | Fit manual/automated operation processes in different hazardous scenarios |
| Explosion-proof Safety | Mechanical + electrical double explosion-proof; anti-static spark suppression | Eliminate all spark hazards, safe for flammable gas/dust environment |
| Heavy-duty Stability | High-strength steel structure; uniform load distribution | Stable operation for heavy tonnage hoisting, reduce mechanical wear |
| Long-term Reliability | High-quality core parts; anti-corrosion/anti-static treatment | 30% longer service life, low failure rate in harsh overseas environment |
| Overseas Compatibility | International explosion-proof standard; customizable power supply | Adapt to global power grids and hazardous area operation standards, direct export |
| Installation & Expansion | Modular assembly; customizable parameters | Easy on-site installation, expandable for subsequent capacity upgrade |
| Operational Efficiency | Stepless speed regulation; high synchronization cooperative operation | Improve heavy tonnage hoisting efficiency, reduce operation time |
Detailed Specifications for Henan Mine Crane Dual trolley explosion-proof bridge crane
|
Capacity |
T |
20/5 |
||||||
|
Span |
m |
7.5 |
10.5 |
13.5 |
16.5 |
19.5 |
22.5 |
25.5 |
|
Lifting height |
m |
9/12/18/24 |
||||||
|
Lifting speed |
m/min |
3.5(3.5/0.35) or8(8/0.8) |
||||||
|
Trolley travelling speed |
m/min |
20 |
||||||
|
Crane travelling speed |
m/min |
20 |
||||||
|
Total weight |
kg |
10500 |
11500 |
13640 |
15980 |
17700 |
20300 |
22920 |
|
Max. Wheel load |
KN |
118 |
129 |
135 |
148 |
156 |
164 |
169 |
|
Rail recommended |
Model |
38kg/m |
||||||
|
Total motor power |
kw |
19.3 |
||||||
|
Main dimension (mm) |
Span(m) |
7.5 |
10.5 |
13.5 |
16.5 |
19.5 |
22.5 |
25.5 |
|
Rail top to crane top |
H |
1790 |
||||||
|
Rail top to hook center |
H4 |
-350 |
||||||
|
Crane base distance |
W |
3750-4500 |
||||||
|
Crane width |
B |
4632-5982 |
||||||
|
Trolley rail distance |
K |
1600-2550 |
||||||
|
Hook left limitation |
S1 |
1100 |
||||||
|
Hook right limitation |
S2 |
1100 |
||||||
|
Capacity |
T |
32/10 |
||||||
|
Span |
m |
7.5 |
10.5 |
13.5 |
16.5 |
19.5 |
22.5 |
25.5 |
|
Lifting height |
m |
9/12/16/24 |
||||||
|
Lifting speed |
m/min |
3(3/0.3) or7(7/0.7) |
||||||
|
Trolley travelling speed |
m/min |
20 |
||||||
|
Crane travelling speed |
m/min |
20 |
||||||
|
Total weight |
kg |
12530 |
14660 |
16360 |
18870 |
21650 |
24260 |
27060 |
|
Max. Wheel load |
KN |
167 |
184 |
196 |
206 |
215 |
224 |
233 |
|
Rail recommended |
Model |
43kg/m |
||||||
|
Total motor power |
kw |
20 |
||||||
|
Main dimension (mm) |
Span(m) |
7.5 |
10.5 |
13.5 |
16.5 |
19.5 |
22.5 |
25.5 |
|
Rail top to crane top |
H |
1900 |
||||||
|
Rail top to hook center |
H4 |
-700 |
||||||
|
Crane base distance |
W |
1600-2500 |
||||||
|
Crane width |
B |
5070-5960 |
5572-6222 |
|||||
|
Trolley rail distance |
K |
1600-2550 |
||||||
|
Hook left limitation |
S1 |
1100 |
||||||
|
Hook right limitation |
S2 |
1600 |
||||||
Product Advantages Overview
Details of the Explosion-proof electric hoist bridge crane Manufactured by Henan Mine
Application Scenarios of Dual trolley explosion-proof bridge crane Manufactured by Henan Mine Crane
-
Petrochemical refinery workshopDouble trolley explosion-proof cranes are suitable for refineries, chemical fiber factories and other flammable and explosive production workshops, for reaction kettles, large storage tanks, chemical towers and other heavy components lifting operations.
-
Coal chemical production workshopDouble trolley explosion-proof cranes are suitable for coal gas, coking, tar processing high-risk plant, lifting coal chemical heavy equipment, piping components, raw material storage tanks.
-
Hazardous chemical storage and logistics depotDouble trolley explosion-proof cranes are used in flammable and explosive hazardous chemicals storage and transit depot, lifting barrels of hazardous chemicals, heavy-duty tanks, storage racking components.
-
Paint and ink production workshopDouble trolley explosion-proof cranes are used in paint, lacquer and ink production plants to lift resin raw material drums, reaction kettles, finished product storage tanks and production equipment.
-
Military special material processing areaDouble trolley explosion-proof cranes are suitable for military flammable and explosive special raw materials, precision components processing workshop, double trolley micro-controlled, accurate lifting of heavy military parts, special material carriers, fully sealed explosion-proof structure + anti-static design, to eliminate the hidden danger of combustion and explosion, to meet the military high-risk scenarios of the stringent safety standards.
-
Shipbuilding explosion-proof painting workshopDouble trolley explosion-proof cranes are used in explosion-proof painting and hull component lifting stations in ship repair factories. The double trolleys work together to lift ship segments, painting equipment and heavy-duty fittings, resisting flammable gases evolved from paint, and the explosion-proof and wear-resistant structure is adapted to the harsh conditions of outdoor shipyards to realize accurate explosion-proof lifting of large parts.
-
Gas storage and transportation station areaDouble trolley explosion-proof cranes are suitable for gas storage stations, liquefied petroleum gas storage and transportation plants, lifting gas storage tanks, pipeline equipment, storage and transportation accessories.
Crane Operation Demonstration
How to Choose the Best Crane Manufacturer in China
-
1Clarify Your Crane NeedsThoroughly understand your lifting requirements (load details, frequency, and workspace environment) before approaching crane manufacturers.
-
2Determine Crane Service ClassCalculate the required crane service class based on your operational intensity to ensure optimal performance and longevity.
-
3Explore Crane Supplier Custom Features:Investigate available customization options and special features to enhance safety, efficiency, and precision for your specific application.
-
4Assess Crane Factory Engineering CapabilityEvaluate the manufacturer's engineering strength to ensure they can design a suitable solution tailored to your needs.
-
5Verify Quality & Compliance of Crane CompanyCheck the crane manufacturer's manufacturing quality, certifications, and compliance with international standards and your local safety regulations.
-
6Ensure Support & ReferencesConfirm the manufacturer provides reliable after-sales support and has a proven track record with positive references in your industry or region.
Why We Are More Trustworthy
Experienced company
Professional team & equipment
Productive capacity
Customized design services
Why Our Cranes Earn Customers' Trust
The services we provide
Free customization scheme
Regular Maintenance Reminder
Technical support consultation
Free customization scheme
Our Patents and Certifications
Customer Testimonials & Top Choices
Related Product Recommendations
Become our distributor
Your Top Concerns About Henan Mine manufactured Dual trolley explosion-proof bridge crane and Professional Answers
-
What flexible cooperation options are available for international clients?Answer: We offer globally competitive cost-performance ratios and diversified international cooperation solutions! We provide multiple trade term options including FOB, CIF, and DDP, along with customized payment methods such as letters of credit, installment payments, and milestone-based project payments.
-
What are the core advantages of the dual trolley design?Answer: The core advantage of the double trolley design is the flexibility to adapt to multi-tonnage lifting and load sharing to enhance safety and equipment life.
-
What is the explosion-proof rating?Answer: The equipment comes standard with Ex d IIB T4, which is the mainstream explosion-proof grade in the chemical and petroleum industries, and can be adapted to most flammable and explosive gas environments and dust environments at the same time.
-
How to connect with the automated production line of the factory?Answer: According to the automated production process of the customer's workshop, we can preset the lifting path, lifting height, and operating points to realize the automatic start-stop, automatic positioning, automatic loading and unloading of the double trolley without manual intervention.
-
What is the maximum customizable tonnage?Answer: Of course, it can be customized in all dimensions. The equipment comes with 20+20t as standard, and we can customize 30+30t, 40+40t, and the maximum can be customized up to 50+50t according to the customer's large tonnage lifting demand.
-
Do the products comply with international explosion-proof standards?Answer: The products comply with the mainstream explosion-proof certification systems such as EU ATEX and international IECEx, and can be directly exported to Europe, North America, Southeast Asia, the Middle East and other parts of the world.
-
Is it difficult to install the equipment?Answer: The installation difficulty is much lower than that of traditional large-tonnage explosion-proof cranes, without large-scale special lifting equipment. The equipment adopts modular assembly design, the main beam, end beam, double trolley are independent modules.
-
What do I need to pay attention to for daily maintenance?Answer: Daily maintenance is centered on the inspection of explosion-proof parts and debugging of double trolley system, and regular inspection of explosion-proof seals, explosion-proof casing is intact, and whether there is any breakage or loosening.
-
How to switch between the four control modes?Answer: The switching of the four control modes is very simple, the mode switching knob is provided in the main control box and the operating end of the equipment, and the seamless switching can be accomplished by simply rotating the knob without complicated parameter settings.
-
What is the lead time for single unit/bulk purchase?Answer: Conventional 20+20t double trolley explosion-proof crane specifications for a single delivery cycle is 15-30 days, customized large-tonnage models delivery cycle is 30-45 days, bulk purchases of 5 units and above can be compressed by 15% of the delivery cycle.
-
Can we change the brand of double trolley parts?Answer: Our double trolley operation system is designed with international common standard dimensions for installation interfaces, so there is no need to modify any structure of the equipment and it can be replaced directly.
-
Konecranes explosion-proof cranes compared to the brand, where the cost-effective advantage?Answer: The whole life cycle cost of our QBE type double trolley explosion-proof overhead travelling crane is more than 50% lower than that of international brands, so the cost-effective advantage is very outstanding. At the same time, our equipment can be customized according to the customer's actual operational needs of the tonnage, control mode, more in line with the global customer's personalized lifting needs.
Operating Manual for Dual trolley explosion-proof bridge crane
-
Each crane must display a rated load capacity plate in a conspicuous location.
-
No personnel are permitted on the girder during operation, nor may the hook be used to transport persons
-
Operation is prohibited without a valid operator's license or under the influence of alcohol.
-
Operators must maintain full concentration during operation; talking, smoking, or engaging in unrelated activities is strictly forbidden.
-
Keep the crane clean and tidy; do not store equipment, tools, flammable materials, explosives, or hazardous substances haphazardly.
-
Do not overload the crane.
-
When operating along obstacle-free paths, the hook, lifting device, or bottom surface of the load must remain at least 2 meters above ground level. When crossing obstacles, the load must clear the obstacle by at least 0.5 meters
-
For loads under 50% of rated capacity, both lifting mechanisms may operate simultaneously. For loads exceeding 50% of rated capacity, only one mechanism may operate.
-
.For bridge cranes equipped with main and auxiliary hooks, do not simultaneously raise or lower both hooks (except under special circumstances).
-
Welding or hammering on suspended loads, or working beneath suspended loads, is prohibited (except when properly supported).
-
Inspection or maintenance work may only be performed after power has been disconnected and a “Do Not Operate” sign is displayed on the power switch. If live work is unavoidable, implement safety measures and assign dedicated supervision.
-
Do not throw objects from the vehicle indiscriminately.
-
Regularly inspect limit switches and interlock protection devices.
-
Do not use limit switch impact as a stopping method.
-
Do not lift or lower loads when hoist brakes malfunction.
-
Do not operate the hoist above personnel or equipment.
-
When welding any part of the crane, use a dedicated ground wire; do not use the crane body as a ground.
-
When the hook is at its lowest position, ensure at least two full turns of safety rope remain on the drum.
-
Cranes must not collide with each other; using one crane to push another into operation is strictly prohibited.
-
When lifting heavy objects, molten metal, explosives, or hazardous materials, first slowly raise the load 100–200 mm off the ground to test brake reliability.
-
Maintenance and inspection lighting must operate at voltages below 36V.
-
All electrical equipment enclosures on bridge cranes must be grounded. If trolley rails are not welded to the main girder, grounding measures must be implemented. Grounding conductors may use galvanized flat iron with a cross-sectional area exceeding 75mm², bare copper wire of 10mm², or galvanized round steel exceeding 30mm². The operator's cab or crane body shall have more than two grounding points. The grounding resistance from any point on the crane to the power supply neutral point shall be less than 4Ω.
Directly state your needs and receive professional advice!
The project was delivered on time and landed safely
Improve efficiency
Avoiding risks