Overview
A Four-Beam Overhead Crane with Hook is a high-efficiency, multi-functional industrial lifting system designed for medium-to-heavy-duty material handling. Featuring a unique four-beam structure (two main girders + two end girders) combined with a high-performance hook mechanism, it enables precise lifting, horizontal transfer, and positioning of loads over large spans.
Core Structure & Technical Highlights
Four-Beam Bridge Structure
Main Girder Design: Two high-strength box-type main girders and two end girders form a rigid "well"-shaped framework. Compared to traditional double-beam cranes, the four-beam design significantly enhances structural rigidity, minimizes deflection, and excels in large-span (≥30 meters) and high-frequency operations.
Torsion Resistance: The four-beam layout distributes load stress effectively, improving resistance to lateral impacts and torsional forces, making it ideal for transporting elongated materials (e.g., steel pipes, profiles) or dynamic loads.
Modular Construction: Prefabricated main girder segments simplify transportation and on-site assembly, reducing installation time.
Hoisting Trolley System
Dual-Rail Operation: The trolley moves bidirectionally along the main girder tracks, powered by independent drive motors for smooth, wobble-free motion.
Lifting Mechanism: Equipped with variable frequency speed-regulating motors, planetary gear reducers, and wire rope drums, it enables stepless speed control for precise positioning (±1 mm accuracy).
Hook Assembly: Forged alloy steel hooks (safety factor ≥5x) with rotation devices and anti-drop latches. Optional dual-hook (main/auxiliary) configurations are available to accommodate varying tonnage requirements.
Electrical & Control System
Variable Frequency Drive (VFD): All motors (bridge, trolley, hoisting) utilize vector frequency control for smooth acceleration/deceleration, minimizing mechanical stress.
Smart Monitoring: Integrated PLC and touchscreen HMI display real-time data (load weight, speed, fault diagnostics) and support data logging/remote transmission.
Multi-Mode Operation: Supports remote control, cabin control, and automated PLC interfacing with production lines.
Key Performance Specifications
| Parameter | Range |
|---|---|
| Rated Capacity | 5–500 tons (customizable) |
| Span | 10–50 meters (custom spans available) |
| Lifting Height | 6–30 meters (adaptable to workshop height) |
| Duty Class | A5–A7 (Heavy to Severe Duty) |
| Bridge Travel Speed | 20–60 m/min (VFD-adjustable) |
| Trolley Travel Speed | 10–40 m/min (VFD-adjustable) |
| Hoisting Speed | 0.5–15 m/min (tonnage-dependent) |
| Power Supply | 380V/50Hz, 3-phase AC |
Safety Protection Systems
Multi-Level Limit Protection: Height limiters, travel limiters (bridge/trolley), and collision sensors.
Overload Protection: Electronic load sensors trigger automatic lockout and alarms for overloads.
Emergency Braking: Dual braking (mechanical calipers + electrical reverse braking) ensures instant lockdown during power loss.
Electrical Safety: IP55-rated motors, surge protection, and emergency stop buttons across all systems.
Structural Integrity: Main girders validated via FEA (Finite Element Analysis), with 100% ultrasonic weld inspection.
Applications
Metallurgy: Molten steel ladle transfer, continuous casting billet handling, roll replacement.
Heavy Machinery: Assembly of large components, pressure vessel positioning.
Energy Sector: Wind turbine blade installation, hydro-generator rotor transport.
Logistics: Container handling, bulk cargo stacking.
After-Sales Support
Global Warranty: 24/7 technical support, 10-year warranty on core components.
Training: Complimentary operator certification and maintenance manuals.
IoT Integration: Remote health monitoring via IoT platforms for predictive maintenance.
