What is a Belt Scraper and How Does it Work?

A conveyor belt scraper, also known as a belt cleaner, is a device used to remove material residues or debris that stick to the conveyor belt as it moves. Its purpose is to keep the belt surface clean, preventing build-up, blockages, and material spills, thereby ensuring smooth and efficient operation of the conveyor system.

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For example, FLEXCO PRIMARY CLEANER FOR 60" WIDE BELT is a belt scraper.

Types of Conveyor Belt Scrapers:

1. Primary Scrapers:

   • Installed at the head pulley (discharge point) of the conveyor.
   • Removes the bulk of material sticking to the belt immediately after it discharges at the head pulley.

2. Secondary Scrapers:

   • Located further down the belt after the primary scraper.
   • Provides additional cleaning to remove finer residues left by the primary scraper.

3. V-Plow Scrapers:

   • Positioned on the return side of the belt to prevent larger debris from being caught between the belt and tail pulley.

4. Rotary Brush Cleaners:

   • Equipped with rotating brushes to remove sticky materials like wet clay or fine powders.

Materials Used in Scrapers:

• Polyurethane: Flexible, durable, and suited for light to medium applications.
• Tungsten carbide: Extremely wear-resistant, used for heavy-duty applications.
• Rubber: Offers high flexibility for sensitive applications.

How a Conveyor Belt Scraper Works:

• Installation: The scraper blade is mounted at an angle to make contact with the conveyor belt.
• Operation: As the belt moves, the scraper applies pressure to the surface, scraping off any remaining material. This prevents material carry-back, which occurs when some residue travels along the belt instead of being discharged.

Uses and Benefits of Conveyor Belt Scrapers:

1. Reduces Carry-back: Minimizes material build-up on the belt and surrounding structure.
2. Prevents Spillage: Keeps the conveyor system clean and minimizes downtime for maintenance.
3. Prolongs Belt Life: Reduces abrasive wear and tear caused by trapped debris.
4. Improves Efficiency: Ensures smooth movement, reducing the risk of jams or belt misalignments.
5. Increases Safety: By keeping the area clean, scrapers reduce the risk of accidents caused by falling material.

Applications:

• Mining: To clean belts carrying coal, ore, or aggregates.
• Cement plants: Removes residue from cement production belts.
• Food processing: Keeps belts clean to meet hygiene standards.
• Recycling: Prevents build-up of waste materials on conveyor belts.

Conveyor belt scrapers are essential tools for ensuring efficiency, safety, and longevity in industrial conveyor systems, making them a critical part of regular maintenance.

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