Published: 2026-08-29
Product Introduction
The reel cable series launched by Shanghai Suoqi Electric Wire & Cable Co., Ltd. is specially designed for repeated winding and long-distance mobile power supply scenarios. They are widely used in port gantry cranes, bridge cranes, ship unloaders, stacker-reclaimers, underground mining transport equipment, and large mobile machinery. During the winding process, cables endure repeated bending, stretching, and torsion stress. Therefore, the product design focuses on conductor structure, cabling process, and sheath material selection to enhance dynamic fatigue life. Non-standard customization is supported based on reel diameter, winding length, number of cores, cross-section, and drag speed to meet power supply requirements of different tonnage equipment.
Operating Condition Pain Point Analysis
The working conditions for reel cables are far harsher than for fixed installation. First, high-frequency bending fatigue. As the equipment reel is repeatedly wound and unwound, the cable undergoes a bending cycle each time it is coiled; if the conductor stranding pitch is unreasonable or the structure is loose, the copper strands will gradually break due to metal fatigue, manifested as increased core resistance, localized overheating, or even power failure and shutdown. Second, concentrated torsional stress. When the reel is wound and unwound, the cable experiences torsion. If the residual internal stress in the cable cores is not released, kinks can form at stress concentration points, accelerating sheath cracking. Third, axial tensile impact. During the rapid lifting of heavy equipment, the cable is subjected to instantaneous impact tension; the conductors and fillers of ordinary cables can be stretched or displaced, resulting in changes in outer diameter and insulation damage. Fourth, exposure to outdoor and oil-contaminated environments. Working conditions in ports and mines involve sun exposure, rain, oil, and dust; the sheath must be resistant to weathering, oil, and abrasion, otherwise cracks can appear within a few weeks.
Product Technology Analysis
From the perspective of raw material selection, the conductor adopts a fine, soft, oxygen-free copper wire with a layered stranded structure. The diameter of the individual wires is calculated and matched to balance current-carrying capacity and flexibility. Multi-strand layered stranding allows the layers of the cable to slide and compensate when bent, reducing stress concentration on the individual wires. The insulation layer is made of a high mechanical strength elastomer material, maintaining stable electrical performance under repeated bending. The sheath is the core protective layer of this product, made with a high-strength polyurethane or neoprene formula, balancing wear resistance, oil resistance, weather resistance, and flame retardancy. The surface of the sheath is smooth and dense, effectively resisting drag friction and mechanical scratches. For long-length winding conditions, the cable core can be reinforced with fiber layers or a steel core support structure to control the cable's self-weight elongation.
From the perspective of the cable manufacturing process, the most critical process for reel cables is the untwisting cabling method. Conventional twisted cabling can accumulate residual torsional stress in the cable core, which causes twisting when unwound due to stress release. Untwisting cabling synchronously releases internal stress during the twisting process, allowing the cable to remain straight in a free state and to be evenly stressed when wound or unwound. The stranding lay ratio of the cable core is strictly matched, with the pitch forming a reasonable proportion with the reel diameter to avoid excessive bending that could cause conductor displacement. The sheath extrusion uses a tight-wrapping process, controlling the outer diameter tolerance to ensure smooth arrangement of the cable in the reel guide grooves. Before leaving the factory, each reel undergoes bending and pressure tests to ensure dynamic reliability.
Applicable scenarios
Port machinery: gantry cranes, overhead cranes, ship unloaders with drum power supply
Lifting and transportation: mobile power supply for cranes, gantry cranes, and electric hoists
Mining equipment: power supply for stacker-reclaimers, belt conveyors, and underground mobile equipment
Metallurgical plant: Power supply for mobile equipment beside converters and refining furnaces
Material handling: power connection of automated storage and retrieval systems and rail flatcars
Construction Machinery: Crawler Cranes, Tower Cranes Supporting Mobile Power Supply
Core Product Advantages
Stranding and twisting process: release internal stress in the cable core, winding without twisting or bulging
High dynamic lifespan: fine soft copper wires are layered and twisted, resistant to high-frequency bending fatigue
Tensile and wear-resistant sheath: polyurethane/chloroprene rubber formulation, suitable for harsh conditions in ports and mines
Wide temperature range stability: -40°C to 105°C, suitable for outdoor and temperature variation environments
Non-standard customization: Supports customization according to roll diameter, length, and core count, directly supplied from the source factory
A brief introduction to e-commerce
Shanghai Suoqi Drum Cable is specially designed for the repeated winding and unwinding of hoisting equipment drums. The de-twisting cable process releases internal stress without twisting, finely stranded copper wires layered and twisted for high-frequency bending resistance, polyurethane sheath resistant to wear, oil, and weather, tensile structure withstands impact tension, temperature resistance from -40℃ to 105℃. Suitable for mobile power supply scenarios in ports, mines, metallurgy, etc., supports non-standard customization, direct supply from the source manufacturer. Welcome to call 13311756197 for detailed inquiries.
About Shanghai Suoqi
Shanghai Suoqi Electric Wire & Cable Co., Ltd. is a specialized cable enterprise focusing on the research and development, design, production, and sales of special flexible cables. The company's products cover a series including reel cables, flat cables, drag chain cables, encoder cables, polyurethane cables, seawater-resistant cables, seawater-resistant network cables, and high-altitude vehicle cables, which are widely used in ports machinery, mining, industrial automation, marine engineering, and other fields. For more product information or inquiries, please call 13311756197 (same number on WeChat).