Recent news

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  2025-12-04

  Advantages of Adding Frequency Converters to Cranes

  Overhead cranes and gantry cranes are widely used in industrial production, and the requirements for their control systems are becoming increasingly demanding. To ensure the safe, stable, and efficient operation of overhead and gantry cranes, dedicated frequency converters (also known as VFDs) have become an indispensable component. This article will detail the advantages of crane frequency converters. First, below is the total table for the sum: Characteristic No VFD Include VFD Start/Stop Direct start: huge impact, large mechanical vibration Smooth soft start/stop: no effect, stable operation Speed Control Stepped speed regulation (usually 2-3 speeds), poor precision Stepless smooth speed regulation, high precision, capable of achieving extremely low-speed “micro-motion.” Operating Performance Large load fluctuations make positioning difficult and time-consuming. Smaller load fluctuations allow for precise positioning and significantly improved efficiency. Electrical Shock: High starting current (5-7 times rated current), impacting the power grid. Low starting current (<1.5 times rated current) protects the power grid and equipment. Energy Efficiency High energy consumption; energy is wasted as heat during resistance speed regulation. Significant energy savings (especially during speed reduction, energy can be fed back to the grid). Maintenance Costs Contactors, resistors, and brakes wear out quickly and have a high failure rate. Minor...

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  2025-11-20

  Double Girder Gantry Cranes | Maximize Your Heavy Lifting Efficiency

  A double-girder gantry crane plays a crucial role in the world of heavy industry, logistics, and large-scale construction. Efficiency and safety are not just goals—they are imperatives in the modern industrial society. Whether you’re moving heavy machinery, handling shipping containers, or assembling massive structural components, you need crane equipment you can rely on. Dejun Cranes are designed to be the workhorse of your operation, lifting immense loads with ease and transforming your material handling processes. Why Choose a Double-Girder Gantry Crane? Unlike a single-girder gantry crane, the double-girder gantry crane design is to provide superior strength, stability, and hook height. This makes it the ideal solution for the most challenging applications where capacity and precision are critical. Key Features & Advantages Exceptional Heavy-Duty Capacity: Built to handle capacities from 5 tons to 800 tons and beyond. Perfect for lifting heavy, bulky, or oversized items that are beyond the scope of standard cranes. Superior Hook Height: The double-girder design allows for a greater lift height beneath the hook, maximizing your usable workspace beneath the crane. Enhanced Stability & Durability: The twin bridge girders distribute the load evenly, minimizing deflection and ensuring smooth, stable, and safe lifting operations, even at maximum capacity. Customizable for...

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  2025-11-11

  User Manual for General Air Winch

  An air winch, also known as an air tugger, is a single-drum, hand-operated type of winch powered by a piston-type air motor. It is mainly used for transporting or lifting heavy objects in departments such as oilfield drilling, metal mining, coal mining, and construction projects. I. Safety Warning and Preface Qualification Requirements: Installation, operation, and maintenance must be carried out by trained and qualified personnel. Read the manual: Before installation and operation, please read and understand this manual and all safety markings on the air winch equipment. Personal Protection: Operators must wear safety helmets, safety shoes, gloves, and other personal protective equipment. Load Safety: Do not stand under the load! Please ensure that the load path is unobstructed and free from personnel and obstacles. Working Pressure: Ensure that the air source pressure is always within the range specified on the air winch nameplate (usually 0.4–0.7 MPA). II. Preparations Before Installation 1. Inspect the air winch equipment and tools Opening the box for inspection: Compare with the delivery list to check if all the components, such as the main body of the air winch, handle/valve, hook, bolts, etc., are complete, and whether there is any damage during transportation. Tool Preparation: Prepare...

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  2025-10-21

  Troubleshooting for Electric Hoists | 6 Common Faults and Solutions

  As an indispensable lifting equipment in industrial production, electric hoists play a crucial role in ensuring production efficiency and safety. Their stable operation is essential for maintaining the efficiency of work processes and preventing workplace accidents. However, various problems may occur during daily use, affecting their performance and even endangering the safety of operators. This article summarizes the common faults of electric hoists and their corresponding solutions to help users quickly diagnose and resolve issues to ensure safe and efficient operation. 6 Common Faults and Solutions for Electric Hoists 1. Abnormal noise during operation The abnormal noise from an electric hoist usually indicates the onset of mechanical faults. For example, issues with the motor or gearbox can also cause abnormal sounds. Paying regular attention to operating noise helps detect issues at an early stage. Motor Noise When the noise originates from the motor, stop the hoist immediately. Check if the bearings are damaged, the rotor is scraping, there is single-phase operation, or misalignment. Just like human diseases, mechanical faults usually show external symptoms: A “buzzing” sound usually indicates single-phase operation. A “clinking” sound usually means bearing damage. Misalignment or rotor scraping produces a high-pitched, sharp noise, and the pitch may...

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  2025-10-14

  Steel Structure Building Solution for Modern Industrial Factories

  Introduction As global environmental awareness grows, industrial construction faces increasing pressure to adopt eco-friendly practices. Steel structures have emerged as a cornerstone of green factory design, offering unparalleled advantages in sustainability, energy efficiency, and pollution reduction. China, as a global leader in steel production and technological innovation, now delivers high-quality steel solutions tailored to meet the demands of large-scale industrial facilities, aligning with the country’s national “dual-carbon” goals. Environmental Advantages of Steel-Structure Factories Pollution Mitigation Dust & Waste Reduction: Unlike traditional materials (e.g., concrete, bricks), prefabricated steel components minimize on-site dust and construction waste by up to 70%, significantly improving air quality and worker health. Recyclability: 90% of steel used in factories can be recycled without quality loss, reducing landfill dependency and enabling circular resource utilization. Low-Carbon Manufacturing Steel production processes in China now achieve 40% lower CO₂ emissions compared to 2010 through EAF (Electric Arc Furnace) technology and renewable energy integration. Modular designs reduce material waste by 25%, with precise CNC cutting optimizing resource efficiency. Energy-Efficient Design Strategies for Industrial Steel Structure Buildings Thermal Break Technology High-Temperature Workshops: Ceramic fiber-insulated panels and thermal-reflective coatings are applied to steel frames in foundries or chemical plants, reducing heat transfer by 60%...

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  2025-09-29

  Advanced Overhead Crane Solutions for Modern Paper Mills

  The paper manufacturing industry faces unique challenges in handling heavy, delicate paper rolls and maintaining continuous production cycles. Overhead bridge cranes have become indispensable in addressing these challenges, offering precise, efficient, and safe material handling solutions specifically engineered for paper mill environments. To boost your paper production efficiency, Henan Dejun Industry Co., Ltd. can design and produce tailored overhead crane systems for the unique challenges of the paper industry. The Critical Role of Overhead Bridge Cranes in Paper Manufacturing In paper production facilities, overhead bridge cranes perform several essential functions as below: Handling paper machine rollers with precision positioning during maintenance and operation Transporting finished paper rolls from production areas to storage facilities Replacing critical components in paper machines, even in high-humidity conditions Supporting maintenance operations throughout all work areas of the paper mill Specialized double girder overhead cranes for paper mills can offer load capacities up to 150 tons with spans reaching 35 meters, equipped with rotating grabs and specialized attachments for secure paper roll handling. Advantages of Overhead Crane Systems in Paper Production Space Optimization and Reduced Infrastructure Costs Contemporary European-style overhead cranes feature compact designs and reduced dead load (approximately 15-30% lighter than traditional models), which significantly...