5-40 Ton European Standard Double Girder Overhead Crane | Customized for Indoor Heavy Lifting
Introduction
Dongqi Crane’s European Standard Double Girder Overhead Crane (5-40 ton capacity) redefines industrial lifting efficiency with FEM/DIN-compliant engineering, modular customization, and smart control systems. Designed for high-frequency operations in steel plants, warehouses, and heavy industries, this crane combines lightweight structural optimization with rigorous safety protocols, delivering a 30% longer service life than conventional models.
1. Product Overview & Competitive Advantages
1.1 Compliance with European Standards (FEM/DIN/ISO)
- Certified under FEM 1.001, ISO 8306, and EN 13001-2 for load calculations, ensuring interoperability across EU markets.
- CE Marking validates full compliance with Machinery Directive 2006/42/EC.
- Work Class A4-A8 (up to 600,000 lifetime cycles) for intensive applications like foundries or container handling.
1.2 Customization-Driven Design
- Lightweight Steel Structure: High-strength Q345B steel girders reduce wheel load by 20%, minimizing foundation costs.
- Space Optimization: Low Headroom (LHR) configurations maximize hook height (up to 60m under hook) in constrained facilities.
Performance Benchmarking
| Parameter | Conventional Cranes | Dongqi European Crane |
|---|---|---|
| Max Capacity | ≤20t | 5-40t (extendable to 80t) |
| Duty Cycle | A3-A5 (Moderate) | A5-A8 (Severe) |
| Ambient Range | -20°C to +40°C | -25°C to +50°C (RH≤85%) |
2. Technical Specifications & Key Components
2.1 Core Performance Parameters
| Specification | 5t Model | 20t Model | 40t Model |
|---|---|---|---|
| Span Range (m) | 10.5-31.5 | 13-31 | 13-31 |
| Max. Lifting Height (m) | 60 (customizable) | 60 | 60 |
| Lifting Speed (m/min) | 12.5 (VF adjustable) | 7.2 (0.63-7.2 VF) | 5.0 (0.63-5.0 VF) |
| Travelling Speed (m/min) | 32/40 (dual-speed) | 32/40 | 20/32 |
| Cross Travel Speed (m/min) | 20/32 | 20/32 | 16/20 |
| Total Power (kW) | 22.8-27.8 | 55.6-69 | 93.5-110.5 |
| Noise Level (dB) | ≤75 (at 10m) | ≤78 | ≤80 |
Notes:
- VF = Variable Frequency drive for stepless speed control (±2% accuracy)
- Dual-speed options for precision positioning (e.g., 5% rated speed for alignment)
2.2 Structural Components
(A) Double Girder Design
- Material: Q345B steel (yield strength ≥345MPa, impact tested at -20°C)
- Welding Standards: EN ISO 5817-B (100% UT/MT tested)
- Deflection Limits:
- Vertical: ≤ Span/800 (FEM 1.001 Class B)
- Horizontal: ≤ Span/2000 (anti-sway)
- Corrosion Protection:
- Primer: 80μm epoxy zinc-rich (ISO 12944 C4)
- Topcoat: 60μm polyurethane (RAL color customizable)
(B) End Carriages
- Wheel Configuration: 4-wheel (≤32t) / 8-wheel (≥32t)
- Wheel Material: 65Mn forged steel (surface hardness HRC 50-55)
- Wheel Diameter: Φ400mm (5t) to Φ710mm (40t)
- Rail Type: QU80/QU100 (DIN 536)
2.3 Hoisting Mechanism
| Component | Specification | Advantage |
|---|---|---|
| Motor | IEC 60034-30 IE3 premium efficiency | 5% higher efficiency vs. IE2 |
| Reducer | QY3D-series hard gear (FEM K7, 50,000h life) | Low-noise (≤68dB), 94% transmission efficiency |
| Brake | YWZ9-Ed hydraulic disc (fail-safe) | 0.5s emergency stop at full load |
| Wire Rope | 8×36 WS IWRC (2,160MPa, zinc-plated) | 25% longer service life vs. 6×19 |
| Drum/Diameter | Φ400-Φ800mm (grooved, DIN 15020) | Optimized rope bending ratio (D:d≥18) |
| Hook | FEM M6 forged steel (100% load tested) | 360° rotation with anti-twist design |
2.4 Electrical System
(A) Power Supply
- Conductors:
- Standard: C-section copper trolley (IP54, 500V AC)
- High-Temp: Stainless steel armored (for +60°C environments)
- Voltage: 380V/415V 50Hz (480V 60Hz optional)
(B) Control System
- PLC: Siemens S7-1200 (SIL-2) with PROFINET interface
- Frequency Inverter: ABB ACS880 (IP55, 150% overload for 60s)
- Protections:
- Phase loss
- Overvoltage (≥110% Un)
- Motor thermistor (PTC 140°C trip)
(C) Operator Interfaces
| Type | Specification |
|---|---|
| Pendant Control | IP65, 8-button (up/down/left/right/emergency) |
| Radio Remote | 2.4GHz FHSS (500m range, 10h battery) |
| Cabin | ROPS/FOPS certified, HVAC optional |
2.5 Safety Systems
| Feature | Technical Standard | Function |
|---|---|---|
| Overload Limiter | EN 13155 (±3% accuracy) | Cuts power at 110% SWL |
| Limit Switches | Heavy-duty ZJV series (100,000 cycles) | Dual-redundant (mechanical + encoder) |
| Anti-Collision | Laser ranging (LMS511, ±1cm accuracy) | Auto-brake at 2m proximity |
| Emergency Stop | Category 0 (EN 60204-1) | Hardwired circuit bypassing PLC |
| Rope Slack Detector | Mechanical + sensor dual-system | Prevents empty hook free-fall |
2.6 Special Options
- Explosion-Proof (Ex d IIC T4):
- Motors: WEG W22 Ex d (TEFC)
- Control Box: EEx e pressurized
- Automation Ready:
- Absolute encoder (SSI interface) for position feedback
- Profibus-DP/Modbus RTU for MES integration
- Cold Climate Package:
- -40°C lubricants (Mobil SHC 634)
- Hydraulic heater for brake fluid
Technical Highlights
✔ Precision Control: ±10mm positioning via encoder feedback
✔ Energy Recovery: VFDs regenerate 15% power during lowering
✔ Maintenance-Free: Sealed bearings (50,000h L10 life)
3. Industry-Specific Customization
Dongqi Crane’s 5-40T European Double Girder Overhead Crane is engineered for heavy-duty industrial applications, with modular designs optimized for different sectors. Below is a detailed breakdown of industry-specific configurations.
3.1 Steel & Metallurgy Industry
(A) High-Temperature & Heavy-Duty Handling
- Ladle & Molten Metal Handling
- Special Hook & Trolley:
- Forged Steel Hook (FEM M8, 3x Safety Factor) – Heat-treated for +400°C environments
- Dual Trolley System (50T+50T) – Synchronized lifting via PLC control (±5mm accuracy)
- Heat Protection:
- Ceramic Fiber Insulation – Shields motors/electronics from radiant heat
- High-Temp Paint (800°C resistant) – Protects girders near furnaces
- Scrap & Slag Handling
- Electromagnetic Option:
- 5T-20T Lifting Capacity – Auto-demagnetization to prevent material drop
- Cable Reel System – Ensures continuous power to electromagnet
- Abrasion-Resistant Components:
- Hardox 450 Wear Plates – On trolley frames for scrap impact resistance
(B) Foundry & Casting Applications
- Explosion-Proof (Ex d IIC T4):
- Motors & Electricals: WEG W22 Ex d (dust-ignition-proof)
- Conductor Bars: Stainless steel for spark resistance
3.2 Logistics & Warehousing
(A) High-Speed Material Handling
- Dual-Speed Hoisting (1/10 Rated Speed) – Precision placement for fragile goods
- Anti-Sway Control (Siemens SIMOTION) – Reduces load swing by 80%
(B) Long & Bulky Loads
- Twin-Hook Configuration (20T+20T) – For balanced lifting of pipes/beams
- Extended Cross Travel (Up to 40m Span) – For wide-area coverage
(C) Automated Warehouses
- RFID Integration – Auto-recognizes load weights
- Automated Positioning (±2mm Accuracy) – For AS/RS compatibility
3.3 Automotive & Manufacturing
(A) Press Line & Stamping
- Precision Handling (0.5m/min Micro-Speed) – For die alignment
- Vibration Dampers – Reduces shock loads during transfers
(B) Assembly Line Integration
- PLC-Controlled Path Memory – Pre-programmed lifting sequences
- Interlock with Conveyors – Safety signals via PROFIBUS
3.4 Energy & Heavy Engineering
(A) Wind Turbine Component Handling
- Specialized Spreader Beams – For blade/nacelle lifting
- Outdoor Weatherproofing (IP56) – For coastal wind farms
(B) Nuclear & Power Plants
- SIL-3 Safety Controls – Redundant limit switches
- Stainless Steel Construction – For corrosion resistance
3.5 Food & Pharmaceutical
(A) Hygienic Design
- Stainless Steel (AISI 304) Hoist – Easy cleaning, FDA-compliant
- Dust-Proof Enclosure (IP65) – For flour/sugar mills
(B) Explosion-Proof (ATEX Zone 22)
- Brushless Motors – No spark risk in grain silos
3.6 Ports & Heavy Transport
(A) Container Handling
- Twist Lock Compatibility – For ISO container lifting
- Salt Spray Protection (ISO 9227) – For coastal environments
(B) Heavy Machinery Loading
- 300T+ Custom Configurations – For shipyard gantries
Customization Workflow
- Requirement Analysis – On-site survey or CAD review
- Design Approval – FEM/ISO compliance check
- FAT (Factory Acceptance Test) – Load + function testing
- Installation & Training – Turnkey service
Lead Time:
- Standard: 30-45 days
- Complex Customizations: 60-90 days
4. Smart Control & Safety Systems
4.1 Multi-Layer Protection
- Mechanical Redundancy: 65Mn forged wheels + torque-limiting couplings.
- Real-Time Monitoring: Wireless load display + descent overspeed governor.
4.2 Intelligent Operation
- Control Modes:
- Pendant/Radio remote (IP65 rating).
- IoT-enabled cabin: Predictive maintenance alerts via cloud.
- Automation Ready: Path pre-programming + anti-sway AI (±10mm positioning accuracy).
5. Quality Assurance & Global Support
5.1 End-to-End Service
- Delivery: 30 days (design → commissioning, including FAT).
- Warranty: 3 years on hoist gearbox, 1 year full-machine coverage.
5.2 Project References
- Installed in 120+ countries (e.g., German auto press lines, UAE port gantries).
- Documentation: FEM calculation reports + third-party inspection certificates.
6. Technical Quick Reference
| Model | DQ-EU5t | DQ-EU20t | DQ-EU40t |
|---|---|---|---|
| Span (m) | 10.5-31.5 | 13-31 | 13-31 |
| Speed (m/min) | 12.5 | 7.2 | 5.0 |
| Power (kW) | 22.8-27.8 | 55.6-69 | 93.5-110.5 |
| FOB Price | $12,180+ | $23,900+ | $49,500+ |
Note: Pricing varies with options (e.g., explosion-proof add-ons: +$8,200).
Conclusion
Dongqi’s European double girder crane delivers precision, durability, and adaptability for heavy industries. With configurable automation interfaces and lifecycle cost savings up to 25%, it’s engineered to outperform both Asian and EU-made alternatives.
Request a quote today with your span/height requirements for a tailored solution.
Enhancement Suggestions
- Embed 3D interactive models of trolley/end carriage designs.
- Add case study videos (e.g., “40t crane in a Polish steel mill”).
- Include comparative TCO analysis vs. Konecranes/EOT cranes.
