Double-girder bridge crane

The Henan Mine LH Double-Girder Bridge Crane is a classic model specifically designed for medium-to-heavy-duty lifting applications. Its core design combines a “dual main girder load-bearing structure with an electric hoist lifting mechanism,” offering lifting capacities ranging from 5 to 50 tons and spans from 8 to 35 meters. It is suitable for diverse complex operating conditions, including standard temperature, high temperature, explosion-proof, and corrosion-resistant environments. This equipment combines the heavy-load stability of double-girder cranes with the operational flexibility of electric hoists. It addresses the insufficient heavy-load capacity of single-girder cranes while offering greater portability and cost-effectiveness compared to traditional double-girder hook cranes. Widely used in machinery manufacturing, metallurgy, power generation, building materials, and other industries, it provides a solid foundation for enterprises to achieve efficient and safe medium-to-heavy load handling.

Henan Mine’s Clean Explosion-Proof Crane

• Main girders utilize Q355B high-strength steel, formed through CNC plasma cutting and automated submerged arc welding. The entire structure undergoes shot blasting rust removal, with weld quality meeting GB/T 12469-2019 Grade 1 standards. It exhibits strong bending and torsional resistance, maintaining deformation-free operation under 50t heavy-load conditions.
• The box-type dual-girder design ensures even stress distribution and a large load-bearing area. Paired with reinforced end beams and high-rigidity wheel assemblies, it achieves 60% greater operational stability than single-girder cranes, minimizes start/stop impact, and effectively prevents damage from heavy-load collisions.
• Critical load-bearing components undergo quenching and tempering heat treatment, achieving fatigue strength exceeding 10⁷ cycles. Designed for a 20-year service life, it significantly surpasses industry averages, reducing equipment replacement frequency and investment costs.

• Equipped with Henan Mine’s independently developed CD/MD electric hoist, offering dual-speed lifting adjustment from 0.8 to 8 m/min. High-speed operation enhances transfer efficiency under light loads, while low-speed, stable lifting ensures safety during heavy-load operations.
• The hoist features an integrated design with compact structure and easy installation. Paired with a wireless remote controller, it enables remote operation within a 100-meter range with ±3mm precision, meeting demands for heavy-duty component assembly and precise material handling.
• Core components—motor, reducer, and drum—are in-house manufactured. After 1200+ hours of fatigue testing, failure rates are reduced by 70% compared to industry averages, lowering maintenance costs.

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• Customized for diverse conditions: Tailored models include high-temperature (withstands radiant heat over 800°C), explosion-proof (ExdⅡBT4/ExdⅡCT4 rated), corrosion-resistant (suitable for acidic/alkaline or high-humidity environments), and low-headroom (for facilities under 4.5m ceiling height);
• Multi-layered Safety Protection: Standard features include overload protection, off-center load warning, travel limit switches, collision prevention, and emergency braking. Real-time monitoring of operational status triggers automatic shutdown and alerts during anomalies. Equipped with an emergency power system, it ensures smooth braking during sudden power outages to prevent material drop.
• Comprehensive Compliance Certifications: Products hold National Special Equipment Manufacturing License (Class A) and Installation/Modification/Maintenance License, comply with GB/T 14405-2011, GB 6067, and other national standards, ensuring smooth acceptance by special equipment inspection institutes and industry safety audits.

• Outstanding Cost-Effectiveness: Compared to traditional double-girder hook cranes, it features a lighter structure and lower manufacturing costs while retaining the heavy-load capacity of double-girder designs, saving enterprises with medium-to-heavy load requirements over 30% in procurement costs;
• Energy Efficiency & Reduced Consumption: Electric hoists equipped with YE4 ultra-high-efficiency motors achieve over 30% energy savings compared to conventional motors; Optimized transmission design achieves 96% efficiency, further reducing operational energy consumption.
• Rapid Customization & Delivery: Operating Asia’s largest single crane production facility with over 600 automated machines, standard models ship within 15-20 days while customized units are delivered in 30-45 days, meeting urgent production demands.
• Intelligent Upgrade Adaptability: Supports retrofitting with PLC intelligent control systems, laser positioning, energy consumption monitoring modules, and seamless integration with MES, ERP, and other production management systems. Enables multi-device coordination and real-time data traceability, accelerating enterprise smart manufacturing transformation.

• Machinery Manufacturing: Heavy machine tool assembly, large component processing/transportation, finished engineering machinery warehousing, etc.;
• Metallurgy Industry: Auxiliary material hoisting in steelmaking workshops, billet transfer in continuous casting workshops, equipment maintenance in rolling mills;
• Power Industry: Boiler component maintenance in thermal power plants, auxiliary hoisting for generator units in hydroelectric stations, transformer handling in substations;
• Building Materials Industry: Clinker transfer in cement plants, raw material hoisting in glass factories, block handling in stone processing plants;
• Chemical Industry: Material hoisting in explosion-proof workshops, equipment maintenance in acid/alkali workshops, etc.
• Other Scenarios: Heavy cargo loading/unloading in large warehouses, port piece cargo transfer, heavy equipment installation in municipal projects, etc.

• Stringent Quality Control: Each unit undergoes multiple rounds of testing (no-load, heavy-load, dynamic load) before shipment, accompanied by nationally recognized inspection reports to guarantee product compliance.
• End-to-End Dedicated Service: Free on-site surveys to develop customized solutions based on production rhythms and site conditions; professional teams handle installation and commissioning, assisting with system integration and special inspection institute acceptance;
• Nationwide After-Sales Network: Over 480 service centers across China, staffed by 200+ specialized LH double-girder crane engineers. 24-hour response, on-site within 8 hours for faults, and within 24 hours for remote areas;
• Warranty Commitment: 1-year warranty for the entire machine; 3-year warranty for core components (electric hoist, motor, reducer). Free repair or replacement for non-human-induced damage during warranty period. Annual maintenance agreements available for scheduled on-site specialized maintenance.