Luzhongbao 500×700×30 Composite High-Speed Cover Plate

Product Features: Corrosion Resistant,Low Noise,High Strength & Load-bearing
With the rapid development of China's expressway network towards intelligence and greenification, problems exposed during long-term use of traditional inspection well cover plates, such as heavy weight, high noise, and insufficient durability, are becoming increasingly prominent. Especially in inspection wells for intelligent transportation systems requiring frequent opening for maintenance, excessively heavy cover plates not only increase operational difficulty but also affect work efficiency and safety. The Luzhongbao 500×700×30 Composite High-Speed Cover Plate is based on advanced lightweight design concepts and composite material technology. Through an innovative thin-wall reinforced structure and an optimized material formula, it successfully achieves a significant reduction in product weight while ensuring load-bearing performance. This product specifically addresses the new requirements for inspection well cover plates in modern expressways, such as lightweight, low noise, and high durability, representing the development direction of a new generation of transportation infrastructure components. This product adopts a high-performance composite material system, with external dimensions of 500mm × 700mm × 30mm. This aerodynamically optimized rectangular design effectively reduces airflow disturbance generated when vehicles pass. The 30mm thin design breaks through the thickness limitations of traditional composite cover plates, achieving maximum structural strength with minimal material usage through an innovative internal three-dimensional mesh reinforcement structure. The cover plate surface uses a micro-convex anti-slip design, with a friction coefficient exceeding 0.85, ensuring driving safety in rainy and snowy weather. The product inherits the excellent characteristics of composite materials, possessing outstanding fatigue resistance, insulation properties, and chemical stability. Its lightweight feature allows single-person opening operation, significantly improving operational efficiency while reducing labor intensity.

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Composite Manhole Cover Luzhongbao Manhole Cover

Product Description Luzhongbao 500×700×30 Composite High-Speed Cover Plate: A Technological Breakthrough in Lightweight Innovation for Expressway Infrastructure. Material System and Process Innovation The technological breakthrough of this high-speed cover plate begins with its innovative material combination and manufacturing process. The matrix uses modified polyurethane resin, which has extremely high toughness and impact resistance, with a fatigue life more than three times that of traditional resins. The reinforcement system adopts a new scheme of hybrid reinforcement using woven fiberglass cloth and carbon fiber. Through precise ply angle design, the product maintains excellent mechanical properties even when thinned by 30%. The manufacturing process employs Vacuum Assisted Resin Transfer Molding (VARTM), ensuring complete fiber impregnation through precisely controlled resin flow paths. A unique temperature gradient curing technology results in more uniform internal stress distribution, effectively avoiding deformation issues common in thin-walled products. The mold design uses nano-level surface treatment technology to create a micro-textured structure on the bottom surface of the cover plate, further enhancing the product's overall stiffness. Structural Design and Performance Characteristics The core innovation of this product lies in its thin-wall reinforced structure design. Within the 30mm thickness space, a bionic honeycomb reinforcing grid is implemented. The grid structure uses a gradually varying density design, increasing the density of ribs in stress concentration areas to achieve optimal material distribution. The edges employ an encapsulated reinforced frame design, significantly improving the fit accuracy and sealing performance between the cover plate and the frame. Laboratory accelerated fatigue tests show that after 2 million simulated high-speed vehicle passes, the cover plate exhibits no structural damage, with a dynamic load capacity retention rate exceeding 95%. Its unique locking system uses a hidden design, ensuring security while maintaining the road surface's flatness and aesthetics. The sealing level between the cover plate and the frame reaches IP68 standard, completely preventing rainwater infiltration. Engineering Applications and Value Analysis In the intelligent construction of expressways, this lightweight cover plate demonstrates significant advantages. Its weight is only 1/5 of traditional cast iron covers, greatly reducing transportation, installation, and maintenance costs. Excellent fatigue resistance ensures no deformation or settlement under long-term vehicle traffic, effectively extending the road surface service life. The cover plate can also embed intelligent sensors, enabling real-time monitoring of the well environment. From a whole-life-cycle cost analysis, the product's design service life exceeding 25 years and near-zero maintenance characteristics result in a comprehensive cost reduction of over 40% compared to traditional products. The lack of scrap value fundamentally eliminates theft, while exceptional corrosion resistance ensures long-term stable operation in environments with chemicals like de-icing agents. Summary The Luzhongbao 500×700×30 Composite High-Speed Cover Plate successfully achieves the unity of lightweight and high performance through the perfect combination of material innovation and structural optimization. The product not only solves problems associated with traditional cover plates, such as heavy weight, high noise, and poor durability, but also provides a new technical choice for upgrading intelligent transportation infrastructure. The successful development of this product marks an important step towards lightweight and intelligent expressway ancillary facilities, setting a new technical benchmark for future transportation infrastructure construction.