Global Standard Winch Double Girder Overhead Crane 320t 350t 400t 450t 500t Complete Safety Package for Round-The-Clock Operation

Product Description

Product Description

A winch-type overhead bridge crane (commonly "overhead crane/bridge crane") is a bridge-type lifting machine with a wire rope winch (drum hoist) as the core lifting unit. The bridge spans elevated runway rails on both sides of the factory, traveling longitudinally; the trolley with a winch moves transversely along the bridge, enabling 3D heavy load handling.
Core Components
1. Bridge (Main Girder + End Carriages)

- Double-girder design (mainstream), box/truss type, Q355B steel, high strength & light weight .

- Walkway with railings for maintenance; stiffness 1/700~1/1000; welds inspected by UT/MT .

2. Winch Trolley (Heart Unit)

- Lifting Mechanism: Motor → Reducer → Drum → Wire rope → Sheave block → Hook; electromagnetic/hydraulic brake, dual brake optional.

- Travel Mechanism: Trolley drive motor, wheels, rails for transverse movement.

3. Bridge Travel Mechanism: End carriages + driving/driven wheels for longitudinal movement along factory runways.

4. Electrical & Safety System

- Control: Pendant/radio/cabin, VFD for smooth speed control.

- Protection: Overload, limit switch, undervoltage, bumper, wind anchorage (outdoor), rope anti-drop.
Working Principle
- Lifting: Motor drives drum to wind/unwind wire rope; sheave block provides mechanical advantage for hook lifting/lowering.

- Travel: Bridge (longitudinal) + trolley (transverse) cover the entire factory area with precise positioning.
Technical Specifications (Standard)
- Capacity: 5t–500t (single/dual trolley) .

- Span: 10m–50m.

- Duty Class: M3–M8 (light/medium/heavy/extra-heavy) .

- Lifting Speed: 0.4–20m/min; Bridge: 5–90m/min; Trolley: 4–40m/min.

Key Features

Heavy Load Capacity: 5t–500t, ideal for heavy-duty applications .

 Smooth & Precise Operation: VFD drive, low noise, millimeter-level positioning.

 High Safety & Reliability: Multi-protection system, durable core components, compliant with GB/FEM/CMAA .

 Energy Efficiency: Modular design, light weight, low energy consumption, optional .

 Wide Adaptability: Indoor/outdoor, high temperature/explosion-proof/corrosion-resistant customization, operating temperature -20℃~+40℃.
Applications
Steel metallurgy, machinery manufacturing, automotive assembly, power plants, shipbuilding, warehousing & logistics, mold workshops, heavy equipment maintenance .

Specification

Operating method	Aerial operation + Ground operation
Structure Type	Double Main Girder Structure
range of application	Heavy Cargo Handling in Large Workshops
Lifting Capacity	5t-500t
Crane Span	5m-50m

Main Product

Company Profile

Shandong Zhouji Huanqiu Heavy Industry Machinery Co., Ltd. is a core business sector of Shandong Longhui Group. Founded in 2005, the Group has won more than 300 honorary certificates, and passed ISO9001, ISO14001, OHSAS18001 certifications as well as China Compulsory Certification (CCC).  

Covering an area of 220,000 square meters, the company has over 1,560 employees, including 32 senior managers, 18 senior engineers, 106 intermediate engineers and 272 engineering technicians, with more than 10 functional departments such as design, production, quality inspection and safety.  

With over 20 years of deep cultivation in the heavy equipment industry, we specialize in the R&D, manufacturing and global export of lifting machinery. Our products are exported to more than 80 countries and regions including Southeast Asia, the Middle East, Africa, South America and Europe. We mainly provide design, manufacturing, installation and maintenance services for various general overhead cranes, gantry cranes, grab overhead cranes, metallurgical cranes, electric hoists and European cranes, covering 30 series and nearly 6,000 varieties.  

 Adhering to the core values of "Technology-led, Quality-based, Win-win Cooperation", we are committed to providing safe, efficient and reliable heavy equipment and one-stop services for infrastructure projects and factory logistics worldwide. We sincerely welcome domestic and foreign merchants to negotiate business with us.

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