Technical Specifications of Single Girder Electric Hoist Cranes
I. Single Girder Electric Hoist Cranes Definition and Structural Features
A single girder electric hoist crane is an overhead lifting device that utilizes an electric hoist as its core lifting mechanism. It consists of a single main girder (I-beam or box-type structure), end carriages, travel mechanisms, and an electrical control system. Key characteristics include:
- Lightweight Design: Modern models use 16Mn steel or European-style box girders, reducing weight by 30% compared to traditional double-girder models, making them ideal for standard factory floor load requirements;
- Modular Assembly: High-strength bolted connections between the main girder and end carriages enable rapid assembly for spans of 6-30 meters, cutting installation time by 40%;
- Smart Integration: 2025 models feature CANbus communication protocols for seamless integration with Industrial IoT (IIoT) platforms
II. Core Technical Features
1. Electric Hoist System
- Multi-Type Compatibility: Supports CD/MD wire rope hoists (0.5-10t),XN series chain hoists, and explosion-proof configurations;
- Dual-Speed Control: MD-type hoists operate at standard (8m/min) and micro-speed (2m/min) modes, achieving positioning accuracy of ±5mm;
- Safety Redundancy: Dual braking systems (mechanical + electromagnetic) with 110% overload automatic cutoff.
2. Drive and Control System
- Frequency Conversion Technology: Adjustable trolley travel speed (20-40m/min), reducing startup impact by 60%;
- Human-Machine Interface: Bluetooth remote control and mobile app operation with real-time load display and fault diagnostics
III. Typical Applications
| Industry | Configuration | Technical Highlights |
|---|---|---|
| Automotive Manufacturing | 3t/15m span + cleanroom model | Dustproof sealing (compliant with ISO Class 8 standards) |
| Chemical Storage | 5t/20m span + ExdII BT4 explosion-proof certification | Stainless anti-corrosion coating + grounding resistance ≤0.1Ω |
| Cold Chain Logistics | 2t/12m span + -30°C low-temperature kit | Cryogenic lubrication system + condensation-resistant electrical components |
IV. Operation and Maintenance Guidelines
Routine Inspections
- Check wire rope wear every 50 operating hours (allowable wear <10% of original diameter);
- Test emergency brake response weekly (standard value <0.5 seconds);
Periodic Maintenance
- Annual inspection: Includes main girder deflection test (mid-span ≤ S/700) and rail straightness calibration (±3mm/m);
- Critical component lifespan: Wire ropes (≥20,000 cycles), gearbox lubricant (2,000-hour replacement interval)
V. 2025 Technological Trends
- Energy Efficiency: IE4 motors + regenerative braking systems reduce energy consumption by 25%;
- Digital Twin: OPC UA protocol enables virtual-physical synchronization, boosting predictive maintenance accuracy to 92%;
- Extreme Environment Adaptation: Specialized models for -40°C Arctic and +60°C high-temperature operations
Conclusion
Electric single girder cranes and double girder bridge cranes cater to different operational scales and industries. While single girder models offer affordability and space efficiency for light-duty tasks, double girder bridge cranes deliver unmatched power and durability for heavy lifting. By evaluating your load demands, workspace, and long-term goals, you can select the crane that maximizes productivity and safety.
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