Flame-retardant anti-spillage skirtboards are critical sealing devices installed between the chute of belt conveyors and the conveyor belt, combining both anti-spillage sealing and flame-retardant safety functions. They are widely used in material handling scenarios across multiple industries. The following sections provide a detailed introduction from the perspectives of core features, structural design, application scenarios, installation, and maintenance:
Core Features
Flame-retardant Safety: Made from materials such as polyurethane with flame retardants or composite rubber, they are resistant to ignition when exposed to open flames or high temperatures and can inhibit flame spread. Some products comply with explosion-proof standards for special industries like coal mining and chemical processing. For example, polyurethane-based flame-retardant anti-spillage skirtboards have an electrostatic dissipation time of ≤1 second, reducing the risk of fire caused by material leakage.
Wear and Impact Resistance: Special materials and manufacturing processes provide excellent wear resistance. For instance, the wear resistance of polyurethane is 3-5 times that of natural rubber. Some products feature embedded polyurethane blocks at the belt contact area, offering wear resistance up to 10 times that of natural rubber. They can withstand long-term friction and impact from materials like coal and ore, with a service life approximately twice that of ordinary rubber skirtboards.
Sealing and Anti-spillage: With good elasticity and conformity, they tightly adhere to the conveyor belt surface. Even if the belt deviates slightly, they can self-adjust through their elasticity to maintain sealing, reducing material spillage by over 90%. Some double-layer sealing structures (e.g., Y-type or T-type) further enhance anti-spillage effectiveness while suppressing dust emission.
Weather and Corrosion Resistance: Suitable for various harsh environments. For example, polyurethane-based flame-retardant anti-spillage skirtboards maintain stable performance in temperatures ranging from -30°C to 80°C without becoming brittle or softening. They also resist corrosion from acidic water and sulfides in coal, showing minimal aging, cracking, or adhesive layer detachment over long-term use.
Structural Design and Materials
Common Structural Types:
Straight Plate Type: Single-layer sealing structure, suitable for low-wear scenarios with minimal spillage risk. Simple structure and lower cost.
Y-Type / T-Type: Double-layer sealing design, with the inner layer primarily for anti-spillage and the outer layer focused on dust reduction. Sealing effectiveness is improved by 200% compared to single-layer designs, making them ideal for complex conditions with high dust and wear.
Integrated Straight Plate + Skirt Structure: The straight plate attaches closely to the side of the chute, while the bottom contacts the belt to prevent spillage. The skirt can rotate within a certain angle, automatically tracking the belt via rubber plate elasticity, reducing air leakage at seams.
Mainstream Materials:
Composite Materials: The main body is typically a blend of natural rubber and styrene-butadiene rubber, balancing elasticity and stiffness. The wear-resistant layer in contact with the belt features embedded polyurethane blocks, ensuring durability without damaging the belt.
Pure Polyurethane: Made with advanced formulations and processes, offering excellent overall wear and flame resistance. They are 30% lighter than rubber skirtboards, facilitating easier installation and maintenance.
Installation and Maintenance
Installation Methods:
Clamp + Angle Aluminum Fixing: Two clamps per meter, tightened with butterfly nuts or handles for flexible adjustment and good sealing. This is the current mainstream installation method.
Welding / Riveting: Suitable for older equipment but offers relatively poorer sealing and less flexibility for adjustments.
Maintenance Tips:
Regular Inspection: Replace severely worn skirtboards promptly to prevent material leakage. Check the sealing surface for flatness and clean surface contaminants.
Avoid Substandard Products: Low-quality rubber skirtboards may melt at high temperatures, potentially damaging the conveyor belt and chute. Choose certified products that meet industry standards.
Application Scenarios and Market Prospects
Main Application Fields: Widely used in belt conveyor systems across industries such as coal, mining, power, metallurgy, chemical, and ports. Examples include underground coal conveyors in mines, coal handling in thermal power plants, and ore transport in mining operations. They are particularly suitable for explosion-proof and high-dust environments with stringent flame-retardant and anti-spillage requirements.
Market Prospects: With increasing emphasis on safety production and environmental protection in industrial sectors, as well as upgrades in conveyor systems in mining and power industries, the demand for flame-retardant anti-spillage skirtboards continues to grow. Meanwhile, the development of new materials will further enhance their performance and expand their applicability. Future applications in construction engineering and logistics conveyance are expected to gradually increase, indicating significant market potential.