300 Ton Double Girder Overhead Crane

Product Overview

The 300 ton double girder overhead crane is a heavy-duty, high-efficiency industrial lifting equipment designed for ultra-heavy load handling in large-scale industrial scenarios. Manufactured in strict accordance with GB/T3811 national standards and European FEM, DIN industrial specifications, this crane integrates optimized structural design, mature frequency conversion control technology and comprehensive safety protection systems. It is specially developed to solve the lifting and transshipment demands of 300-ton super-heavy materials, equipment and components, featuring stable operation, strong load-bearing capacity, high precision and excellent durability. As a core handling equipment for heavy industry, it can adapt to long-term continuous high-intensity operation and effectively improve industrial production and hoisting efficiency.

Core Structural Design

This double girder overhead crane adopts a mature and reliable box-type bias-rail double main girder structure, which is the key to realizing ultra-heavy load bearing. The two parallel high-strength box girders evenly disperse the heavy load, completely avoiding stress concentration and greatly improving the overall rigidity and stability of the equipment compared with single-girder cranes.

The main girders are connected with high-precision end beams via high-strength integral bolts. Processed by professional precision processing equipment, the connecting surfaces achieve high matching accuracy, ensuring no deviation during long-distance operation and smooth trolley traveling. The end beam adopts an integral torsion-resistant box structure, which effectively resists torsion and vibration during heavy-load operation and enhances the overall structural stability of the crane.

The complete equipment set includes main girders, end carriages, traveling operating mechanism, heavy-duty electric wire rope hoist trolley, electrical control system and multi-dimensional safety protection devices. The overall structure is compact and optimized, with reasonable force distribution, convenient disassembly, transportation and on-site installation, and low later maintenance cost.

Outstanding Product Features

1. Super Strong Load-Bearing & Stable Operation

2. Intelligent Variable Frequency Control & High Precision

3. Durable & Low Maintenance

4. Energy-Saving & Space-Saving

Optimized lightweight structural design reduces the self-weight of the crane and wheel pressure on the factory building track, lowering the requirements for factory building bearing and track foundation. The compact overall structure makes full use of the vertical and horizontal space of the workshop, effectively saving plant space, while the efficient transmission system reduces energy consumption and realizes energy-saving and environmentally friendly operation.

Comprehensive Safety Protection System

Safety is the core design priority of the 300-ton heavy-duty overhead crane. The equipment is equipped with a full set of multi-layer safety protection devices to eliminate operational risks in all directions:

• ◆ Overload Limiter: Automatically cut off the power and trigger an alarm when the load exceeds the rated weight to prevent overload operation damage;
• ◆ Height Limit Device: Dual upper and lower limit protection to avoid collision and wire rope breakage caused by over-lifting or over-descending;
• ◆ Emergency Stop System: Equipped with manual and remote emergency stop buttons, which can quickly cut off the power supply in case of abnormal conditions to stop all actions;
• ◆ Anti-collision Device: Infrared anti-collision induction installed on both ends of the crane to avoid collision between multiple cranes or with workshop buildings;
• ◆ Phase Sequence & Overvoltage/Undervoltage Protection: Protect the electrical system from damage caused by abnormal power supply and ensure stable electrical operation;
• ◆ Rainproof & Dustproof Protection: All electrical components adopt closed protective design, adapting to indoor and semi-outdoor harsh working environments.

Main Technical Parameters

Application Scenarios

This 300-ton double girder overhead crane is widely applicable to heavy-duty industrial fields that require ultra-heavy load handling. It is the preferred lifting equipment for large manufacturing and engineering projects, including heavy machinery manufacturing, steel structure processing, power station equipment installation, bridge engineering construction, shipbuilding workshop, metallurgical workshop, mining equipment maintenance and large warehouse heavy cargo transshipment. It can stably complete the hoisting, moving, positioning and assembly of super-heavy workpieces, effectively supporting high-efficiency and safe production of heavy industry.

After-Sales & Service Guarantee

We provide one-stop full-cycle services including product customization, design, production, on-site installation, commissioning and technical training. All cranes enjoy a one-year full warranty and lifelong maintenance services. We have a professional after-sales team and complete spare parts supply system to quickly respond to customer demands, solve equipment operation faults and daily maintenance problems, and ensure the long-term stable and efficient operation of the equipment.