Bridge Crane

I. Product Image Description

(Suggested to be paired with high-definition real-scene images or 3D renderings, clearly showcasing the following key elements: 1. The bridge structure composed of main beams and end beams (with marked span dimensions and material specifications), vividly illustrating the "bridge-type" design; 2. The lifting trolley (including the hoisting mechanism and traveling mechanism), demonstrating its movement along the main beam track; 3. The hook/grab/emergency electromagnet (adapted according to the product type), highlighting the process of lifting heavy objects; 4. The operation control system (ground control console and cab operator panel, labeled with operational buttons and display screens); 5. Safety devices (such as load limiters, travel limiters, and buffers), clearly indicating the locations of critical safety components; 6. A workshop or factory background scene, emphasizing the industrial application environment.)

II. Product Name

1. General Bridge Crane (5-50t, suitable for general lifting applications such as mechanical manufacturing, metallurgy, warehousing, etc.)
2. Metallurgical Bridge Crane (30–200 tons, high-temperature resistant and corrosion-proof, suitable for metallurgical environments such as steel plants and steelmaking facilities)
3. Explosion-proof Bridge Crane (5-100t, Explosion-proof Rating Ex d IIB T4 Ga/Ex ia IIB T4 Ga, Suitable for Flammable and Explosive Environments such as Chemical Industry, Oil & Gas, Coal Mining, etc.)
4. Double-girder bridge crane (50–500 tons, with a dual main beam structure, offering high stability, ideal for heavy-duty applications such as handling large machinery and shipbuilding).
5. Variable-frequency speed-controlled bridge crane (10–200 tons, precise speed regulation, suitable for scenarios requiring high lifting accuracy, such as precision machining and electronics manufacturing).
6. Customized bridge cranes (customizable in span, height, and lifting attachments to meet the needs of irregular factory layouts and specialized heavy-load lifting requirements).

 

III. Product Introduction

Bridge cranes—also known as "overhead traveling cranes" or "bridge cranes"—are essential heavy-duty lifting equipment in the industrial sector. They operate longitudinally along tracks installed on both sides of factory buildings via a bridge structure, while simultaneously enabling the trolley to move laterally across the main beam of the bridge. This design facilitates precise transfer of heavy objects within three-dimensional space. Compared with other lifting equipment, bridge cranes offer three key advantages: "wide-span coverage," "high load-bearing capacity," and "flexible operational range." Their span can cover factory spaces ranging from 10 to 30 meters, and individual units can handle loads up to 5 to 500 tons. As a result, they are well-suited for lifting applications across diverse industries, including mechanical manufacturing, metallurgy, chemical processing, and heavy industry, effectively addressing the challenges associated with moving long-distance, large-weight, and high-precision objects.

This product series is centered around the core features of "safety and stability, high efficiency and energy savings, and strong adaptability": - It utilizes high-strength steel materials and a precision transmission system to ensure stable performance even under long-term heavy-load operations. - Certain models are equipped with variable-frequency speed control technology, enabling precise adjustment of lifting and traveling speeds, thereby boosting operational efficiency by 20%–30%. - The series supports customized lifting attachments (such as hooks, grabs, electromagnetic chucks, etc.) tailored to specific application scenarios, while also integrating seamlessly with industrial IoT systems for remote monitoring and intelligent maintenance, meeting the personalized lifting requirements of various industries.

IV. Product Details

(1) Core Parameters

 

Product Model	Rated Lifting Capacity	Range of span	Lifting height	Lifting speed	Operating Speed (Large Vehicle / Small Vehicle)	工作级别	适用环境温度	核心适配场景
通用桥式起重机	5-50t	10-30m	6-18m	0.5-10m/min	10-30m/min / 5-15m/min	A3-A5	-20℃-40℃	机械制造、仓储、建材搬运
冶金桥式起重机	30-200t	12-28m	8-25m	0.3-8m/min	8-25 m/min / 4-12 m/min	A6-A8	-30°C to 50°C	Steel plant, steelmaking plant (high-temperature resistant)
Explosion-Proof Bridge Crane	5-100 tons	10-25 meters	6-20 meters	0.4-9 m/min	8-28 m/min / 5-14 m/min	A4-A6	-20℃-40℃	Chemical industry, oil and gas, coal mining (explosion-proof)
Double-girder Bridge Crane	50-500 tons	15-35 meters	10-30m	0.2-6 m/min	5-20 m/min / 3-10 m/min	A7-A8	-25°C to 45°C	Heavy machinery, shipbuilding, and nuclear power plants
Variable-Frequency Speed-Controlled Bridge Crane	10-200 tons	10-30m	6-22 meters	0.1–12 m/min (adjustable)	5-30 m/min (adjustable) / 3-18 m/min (adjustable)	A5-A7	-20℃-40℃	Precision machining, electronics manufacturing, automotive production lines
Customized Bridge Crane	5-600 tons	8-40 meters	5-40 meters	Optimize on demand	Optimize on demand	A3-A8	-30°C to 60°C	Alien-style factory buildings and special heavy objects (such as wind turbine blades and large-scale tanks)

(II) Core Configuration and Features

1.

Main Structural System

• Bridge Structure: Constructed using high-strength low-alloy steel grades Q345B/Q355B. The main beams feature a box-type welded structure (double-beam models incorporate dual box-type main beams), which undergoes shot blasting for rust removal and is subsequently treated with anti-corrosion paint, achieving a rust protection level of Sa2.5. This ensures a service life of ≥20 years. The end beams are connected to the main beams via high-strength bolts, guaranteeing stability in the span direction. Maximum deflection is maintained at ≤L/1000 (where L represents the span length), effectively preventing deformation during prolonged use.
• Track System: The main trolley running track is constructed using P43/P50 heavy-duty steel rails, securely fixed to the plant's column brackets or dedicated track beams. The rail joints are smoothly treated to minimize operational vibrations. Meanwhile, the trolley auxiliary track is embedded into the top surface of the main beam, made from wear-resistant alloy steel with a surface hardness reaching HRC50-55, effectively reducing long-term frictional wear and tear.
• Gantry Adapter: Standard equipped with a hook (made from 20MnSiV high-strength steel, safety factor ≥ 5x). Custom grab buckets are available upon request, suitable for handling bulk materials such as coal and ore. Additionally, electromagnetic lifting devices are available for steel plates and profiles, while specialized fixtures cater to irregularly shaped heavy objects like wind turbine blades and automotive frames, ensuring versatile solutions for various material-handling needs.

 

2.

Drive and Control System

• Lifting Mechanism: Employs a combination of "motor + gearbox + drum + brake." The motor is a three-phase asynchronous motor—specifically, a high-temperature-resistant motor for metallurgical applications or an explosion-proof, flameproof motor for hazardous environments. Some models are equipped with variable-frequency motors, enabling stepless speed adjustment ranging from 0.1 to 12 m/min, ensuring smooth and jerk-free lifting operations. The gearbox features hardened-tooth cylindrical gear transmission with a drive efficiency of ≥95% and noise levels ≤85 dB. The brake system consists of an electromagnetic block-type brake that automatically engages upon power failure, delivering a braking response time of ≤0.5 seconds, thereby guaranteeing safe and stable suspension of heavy loads.
• Operating Mechanisms: Both the trolley traveling mechanism (which drives the longitudinal movement of the bridge frame) and the hoist traveling mechanism (which drives the lateral movement of the lifting trolley) adopt a "variable-frequency motor + gearbox + wheel assembly" configuration. The wheels are made of forged steel with quenched wheel surfaces, ensuring excellent wear resistance. The system supports synchronous operation of both the trolley and hoist, allowing precise control of movement direction and speed via an operator handle. The minimum positioning accuracy can reach ±5 mm, fully meeting the requirements for high-precision alignment.
• Control System: Offers two operation modes—ground console (equipped with wired/wireless remote control, operating range ≤100m, supporting emergency stop, jog, and linked operations) and cab control (the cab features a closed steel structure, complete with air conditioning, shock-absorbing seat, and high-definition display screen, ideal for large-span and high-frequency operational scenarios). The core of the control system is a PLC programmable controller, which supports self-diagnosis of faults, parameter setting, and storage of operational records. Additionally, it can be integrated with industrial IoT platforms to enable remote monitoring and data acquisition.

 

3.

Security Protection System

• Load Protection: Standard equipment includes a load limiter that automatically cuts off the lifting motor power and triggers an alarm when the actual lifting weight exceeds the rated capacity by 10%. Some models are also equipped with an overload warning function, which activates audible and visual alerts when the load reaches 90% of the rated capacity, helping to prevent equipment damage caused by overloading.
• Travel Limiters: Both the large and small trolley travel tracks are equipped with dual protection mechanisms—mechanical limiters combined with electronic limiters. When the equipment reaches the end of the track, it automatically decelerates and stops. Additionally, the lifting mechanism is fitted with upper and lower limit limiters to prevent the hook from overtraveling upward or the drum from overwinding, effectively eliminating mechanical accidents.
• Emergency Protection: Equipped with emergency stop buttons (located in the cab, on the ground control panel, and directly on the equipment body), which instantly cut off power to all motors upon activation. Some models are fitted with buffers (at both ends of the trolley track) made from polyurethane material, designed to absorb impact forces during equipment collisions. Explosion-proof models additionally feature anti-static grounding devices and spark suppressors, ensuring safe operation even in flammable and explosive environments.
• Status Monitoring: The cab display or ground control console provides real-time information on parameters such as lifting capacity, lifting height, operating speed, and equipment temperature. Some models are equipped with a video monitoring system that uses cameras to provide real-time visual feedback on the lifting status of heavy objects, helping to prevent operational errors caused by blind spots.

4.

Accessibility Features

• Energy-efficient Design: The inverter models utilize vector frequency conversion technology, achieving energy savings of 30%-40% compared to conventional fixed-speed motors. Additionally, these models are equipped with an energy recovery system that converts electrical energy generated by the motor during heavy-load descents back into the power grid, thereby minimizing energy loss. The lighting system employs energy-saving LED lamps, which automatically activate only when operations are underway and switch off during idle periods.
• Environmental Adaptability: The metallurgical models feature high-temperature resistance and dust-proof designs, with motors and electrical components rated IP54 for protection, enabling long-term operation in high-temperature environments up to 50°C and dusty conditions. The explosion-proof models meet the Ex d IIB T4 Ga/Ex ia IIB T4 Ga explosion-proof standards, making them suitable for use in Class IIB explosive gas environments. Additionally, outdoor models (designed for operations outside factory premises) are equipped with rainproof and windproof features, achieving an IP55 protection rating that ensures reliable performance even in rainy or snowy weather conditions.
• Smart Operations & Maintenance: Optional industrial IoT modules enable the upload of equipment operational data—such as current, voltage, temperature, and fault codes—to a cloud platform via 4G/5G or Wi-Fi. Administrators can monitor equipment status in real time and receive timely fault alerts through computer or mobile devices. The system also supports remote diagnostics and parameter adjustments, significantly reducing on-site maintenance costs. Additionally, the system automatically tracks equipment operating hours and maintenance cycles, sending proactive reminders when maintenance is due, thereby extending the equipment's service life.

(III) Applicable Scenarios

• Mechanical Manufacturing Industry: Used for handling and installing machine tools, molds, and components within workshops, such as body lifting on automotive production lines or precise alignment during the assembly of heavy-duty machine tools. With its high-precision operational capabilities, it significantly enhances production efficiency.
• Metallurgical Industry: Designed to suit the handling of molten steel ladles, billets, and steel products in steel plants and steelmaking facilities. Metallurgical models feature high-temperature resistance and corrosion-proof properties, ensuring stable operation even under extreme heat conditions, thereby meeting the continuous demands of metallurgical production processes.
• Chemical and Energy Industries: Explosion-proof models are used for lifting raw material tanks and reaction vessels in chemical parks, handling equipment at oil and gas fields, and hoisting underground (and surface-transfer) equipment in coal mines, effectively eliminating the risks of sparks and static electricity during operations.
• Heavy Industry Sector: Double-girder bridge cranes are utilized for lifting and handling ship hull sections in shipbuilding, transporting tower sections and blades for wind power equipment, and installing heavy-duty machinery in the nuclear power sector. With their exceptional load-bearing capacity, these cranes effectively address the challenges associated with moving and positioning ultra-large, heavyweight objects.
• Warehouse and Logistics Industry: Universal models are designed for cargo handling and container transfer operations in large-scale warehouses. When used with electromagnetic lifting devices or grab buckets, they enable efficient handling of both bulk materials and unitized goods, significantly enhancing warehouse turnover efficiency.

(IV) After-sales Service

• Preliminary Services: Provide free on-site surveys (including factory dimensions, load-bearing conditions, and power supply assessments), and design customized solutions tailored to lifting requirements and site environments. Additionally, we will deliver detailed equipment drawings, technical specifications, and cost estimates, assisting clients in completing project approvals and safety registrations.
• Installation and Acceptance: Installation will be performed by a professional team holding "Lifting Machinery Installation Qualification," ensuring strict adherence to the "Supervision and Inspection Rules for Major Overhauls and Modifications of Lifting Machinery." The installation process will be supervised by an independent third-party inspector. Upon completion, the equipment will undergo no-load commissioning and load testing, including a 1.25x rated weight static test and a 1.1x rated weight dynamic test. Finally, the customer, along with the local special equipment inspection authority, will jointly conduct acceptance testing. Only after passing the acceptance test will the Special Equipment Use Registration Certificate be issued.
• Warranty and Maintenance Services: The entire machine comes with a 1- to 2-year warranty (with a 3-year warranty for core components such as the motor, reducer, and brake). During the warranty period, free repair and replacement of faulty components will be provided. Regular maintenance services are also available, including quarterly routine maintenance and annual comprehensive maintenance, covering component lubrication, precision calibration, and safety inspections. Additionally, equipment operation and maintenance records will be established, documenting all maintenance and repair activities.
• Training and Support: We provide free training (theoretical and practical) for customer operators and maintenance personnel, covering equipment operation guidelines, safety precautions, routine maintenance, and emergency troubleshooting procedures. Upon successful completion of the assessment, an operation certificate will be issued. Additionally, we offer a 24-hour after-sales hotline and technical support services. In case of a fault report, we commit to responding within 2 hours and arriving on-site within 4 hours in urban areas, or within 4 hours for response and 8 hours for arrival in suburban areas, ensuring rapid restoration of equipment functionality.

The product system covers high-speed elevators, small machine room elevators, non machine room elevators, passenger elevators, sightseeing elevators, villa elevators, cargo elevators, utility elevators, car elevators, and escalators/escalators. The product has been widely used in large shopping malls, commercial buildings, high-end hotels and other places.