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　　In port loading and unloading operations, container spreader is the core equipment connecting cranes and containers, and its reliability directly affects operating efficiency and safety. The installation of special sheaths has become an important measure for upgrading modern port equipment. The necessity is reflected in the following aspects:

　　1. Protect the core structure of the spreader

　　Container spreader Under long-term exposure to harsh working conditions, the sheath can provide triple protection:

　　1. Physical damage protection:

　　Sheath made of polymer composite materials (tensile strength ≥25MPa) can withstand mechanical damage such as container edge collisions, cargo fall impacts, and reduce the risk of hanger deformation. The actual data from the shipyard shows that the damage rate of the spreader structure after the sheath is added is reduced by more than 60%.

　　2. Corrosion protection:

　　The outer layer of the sheath is coated with polyurethane anticorrosion coating (salt spray resistance test ≥2000h), and combined with a sealed design, it can block corrosive media such as seawater, industrial dust. In coastal ports with high salt spray concentration, the sheath extends the corrosion cycle of metal parts of the spreader for 3-5 years.

　　3. Low-temperature protection:

　　The low-temperature sheath specially designed for cold-band ports (maintain flexibility in -40℃), prevents metal materials from being cold and brittle and cracked, and ensures normal operation in cold environments.

　　2. Improve operation safety

　　1. Prevent goods from falling off:

　　The sheath has a built-in anti-slip texture layer (friction coefficient ≥0.8) to enhance the fit with the container top corner parts. In the Level 7 wind condition test, the container displacement with sheath spreader was reduced by 42%.

　　2. Personnel protection:

　　The edge of the sheath is covered with rounded corners (cavity radius ≥15mm), which solves sharp edges and corners and reduces the risk of operator damage. At the same time, the fluorescent warning bar (reflection intensity ≥300cd/lx/m²) improves the visibility of night operations.

　　3. Adapt to a diversified operating environment

　　Intelligent upgrade:

　　Some sheaths integrate sensor systems, which can be monitored in real time:

　　- Stress status of the spreader (accuracy ±2%)

　　- Sheath wear degree (warning threshold setting)

　　- Environmental corrosion index (data sampling interval ≤5min)

　　IV. Extend the equipment maintenance cycle

　　1. Reduce maintenance frequency:

　　The sheath can absorb more than 80% of the surface wear, extending the main maintenance cycle of the spreader from 3 months to 12 months.

　　2. Reduce replacement cost:

　　Modular sheath supports local replacement, and the maintenance time is reduced by 70%. Compared with the replacement of the overall spreader, the sheathing solution can save more than 60% of the maintenance cost.

　　Conclusion:

　　Combined packing spreader sheathing achieves the comprehensive benefits of equipment protection, safety improvement and cost control through material innovation and structural optimization. Under the trend of port automation and green development, scientific configuration of sheath has become a necessary choice to improve the reliability of loading and unloading systems.

　　In port loading and unloading operations, container spreader is the core equipment connecting cranes and containers, and its reliability directly affects operating efficiency and safety. The installation of special sheaths has become an important measure for upgrading modern port equipment. The necessity is reflected in the following aspects:

　　1. Protect the core structure of the spreader

　　Container spreader Under long-term exposure to harsh working conditions, the sheath can provide triple protection:

　　1. Physical damage protection:

　　Sheath made of polymer composite materials (tensile strength ≥25MPa) can withstand mechanical damage such as container edge collisions, cargo fall impacts, and reduce the risk of hanger deformation. The actual data from the shipyard shows that the damage rate of the spreader structure after the sheath is added is reduced by more than 60%.

　　2. Corrosion protection:

　　The outer layer of the sheath is coated with polyurethane anticorrosion coating (salt spray resistance test ≥2000h), and combined with a sealed design, it can block corrosive media such as seawater, industrial dust. In coastal ports with high salt spray concentration, the sheath extends the corrosion cycle of metal parts of the spreader for 3-5 years.

　　3. Low-temperature protection:

　　The low-temperature sheath specially designed for cold-band ports (maintain flexibility in -40℃), prevents metal materials from being cold and brittle and cracked, and ensures normal operation in cold environments.

　　2. Improve operation safety

　　1. Prevent goods from falling off:

　　The sheath has a built-in anti-slip texture layer (friction coefficient ≥0.8) to enhance the fit with the container top corner parts. In the Level 7 wind condition test, the container displacement with sheath spreader was reduced by 42%.

　　2. Personnel protection:

　　The edge of the sheath is covered with rounded corners (cavity radius ≥15mm), which solves sharp edges and corners and reduces the risk of operator damage. At the same time, the fluorescent warning bar (reflection intensity ≥300cd/lx/m²) improves the visibility of night operations.

　　3. Adapt to a diversified operating environment

　　Intelligent upgrade:

　　Some sheaths integrate sensor systems, which can be monitored in real time:

　　- Stress status of the spreader (accuracy ±2%)

　　- Sheath wear degree (warning threshold setting)

　　- Environmental corrosion index (data sampling interval ≤5min)

　　IV. Extend the equipment maintenance cycle

　　1. Reduce maintenance frequency:

　　The sheath can absorb more than 80% of the surface wear, extending the main maintenance cycle of the spreader from 3 months to 12 months.

　　2. Reduce replacement cost:

　　Modular sheath supports local replacement, and the maintenance time is reduced by 70%. Compared with the replacement of the overall spreader, the sheathing solution can save more than 60% of the maintenance cost.

　　Conclusion:

　　Combined packing spreader sheathing achieves the comprehensive benefits of equipment protection, safety improvement and cost control through material innovation and structural optimization. Under the trend of port automation and green development, scientific configuration of sheath has become a necessary choice to improve the reliability of loading and unloading systems.