The natural rubber double-seal anti-spillage skirtboard is a critical sealing component for belt conveyor chutes, primarily designed to address material spillage and dust emission between the conveyor belt and the chute. Below is an introduction to its core information:
I. Structure and Material
Main Material: The main body is made from a blend of natural rubber and styrene-butadiene rubber, combining stiffness with high elasticity; key contact areas with the belt are coated with a polyurethane wear-resistant layer using imported powder casting technology, offering superior wear resistance compared to standard extrusion products and preventing damage to the belt surface.
Sealing Structure: Features a dual-layer integrated "straight plate + skirt" sealing design, with some products integrating multiple three-strip seals, improving sealing efficiency by 200% over single seals and adding an extra sealing space for an additional 100% efficiency boost over double seals.
Auxiliary Structure: The back is equipped with T-shaped fixing rubber blocks (removable as needed), installed via butterfly nuts or handle-type quick-clamping devices, working with angle aluminum and clamps for rapid fixation and adjustment. Two clamps are required per meter, and installation height can be flexibly adapted to chute dimensions.
II. Working Principle
Dual-Layer Sealing Coordination: The inner straight plate presses tightly against the chute sidewall, with its bottom in close contact with the belt, directly blocking large particle spillage; the outer skirt can rotate within a certain angle, automatically tracking the belt’s movement through natural rubber elasticity to maintain tight contact, further sealing fine materials and dust to suppress emissions.
Self-Adaptive Adjustment: The skirt sealing section uses a unilateral arc transition design, preventing belt or skirt damage during belt misalignment, and automatically resets via rubber elasticity once the belt returns to normal operation, ensuring consistent sealing performance.
Wear Resistance Protection: The polyurethane wear layer reduces abrasion through low friction coefficient design, while the natural rubber material incorporates semi-solidified lubricants, ensuring high durability and avoiding belt damage common with traditional seals.
III. Core Advantages
Excellent Sealing Efficiency: The dual-layer + multi-strip sealing structure achieves dual effects of "material + dust suppression," with seamless design preventing air leakage, suitable for high-dust and large-material conveying scenarios.
High Durability: The polyurethane wear layer has a long service life, lasting 1.5-2 years at belt speeds ≤4m/s; natural rubber offers good weather resistance, adapting to damp, high/low temperature conditions and avoiding polyurethane’s water sensitivity.
Easy Installation: Quick-clamping devices require no complex tools, enabling efficient installation and adjustment, compatible with both old and new chute setups, and allowing skirt replacement by simply sliding out the T-shaped rubber blocks.
IV. Application Scenarios
Widely used in belt conveyor systems across coal, mining, ports, metallurgy, and power plants, especially for bulk material (e.g., coal, ore, fly ash) transport where high sealing and environmental standards are critical, effectively improving working conditions and reducing material waste and equipment wear.