In bulk handling systems across thermal power plants, coking, metallurgy, and construction materials, fine powdery or small lump dry materials often stick to the working face of the return conveyor belt. If left uncleaned, these materials accumulate on return idlers and bend pulleys, leading to belt misalignment, abnormal surface wear, and fugitive dust emissions.
Engineered for dry, low-density, and non-sticky material properties, plate brush cleaners feature high-density herringbone bristle technology, dual-side tensioning mechanisms, and modular replacement capabilities, delivering a cost-effective maintenance solution. This article systematically analyzes the material technology, operating conditions, installation debugging, and troubleshooting standards for plate brush cleaners.
【IMPORTANT SAFETY WARNING】: This plate brush cleaner is a non-explosion-proof product. It is strictly prohibited for use in flammable and explosive environments. The belt conveyor must be shut down during installation, maintenance, brush replacement, and tension adjustment.
I. Structural Features and Herringbone Bristle Technology
The plate brush cleaner consists of a high-strength baseplate, wear-resistant mixed bristles, a split telescopic fixed rod, and powder-coated rustproof mounting brackets:
- High-Density Herringbone Bristle Arrangement:
- Baseplate Material: Built with high-strength PP (Polypropylene), delivering superior impact resistance and corrosion protection.
- Bristle Material: Combines wear-resistant Nylon 66 with copper-plated steel wire in a herringbone pattern. This interlocked arrangement merges the gentle sweeping action of nylon with the rigid scraping force of copper-plated wire, maximizing cleaning efficiency and wear life. Pure wire or pure nylon brushes are customizable for specific duty cycles.
- Split Fixed Rod Design: Composed of a central fixed rod and extension bars on both sides, allowing flexible adjustment of the overall transverse length to fit various conveyor frame widths.
- Dual-Side Fixed Tensioning Mechanism: Equipped with adjustable tensioning units on both sides. As bristles wear down, operators manually adjust the tensioning bolts to restore optimal bristle-to-belt contact.
- Low-Cost Modular Replacement: The corrosion-resistant, high-strength mounting frame has a service life exceeding 5 years, while the brush plate lasts over 1 year under normal operation. When bristles reach their wear limit, only the brush plate needs individual bolt replacement without replacing the main frame, drastically lowering maintenance costs.
II. Recommended Material Applications and Operating Conditions
The plate brush cleaner is specifically engineered for dry, powdery or lump, low-density, non-sticky material cleaning:
- Energy & Metallurgy: Pulverized coal, coking coal, anthracite, coke, iron ore fines.
- Building Materials & Chemicals: Limestone, dolomite, active lime, light burnt dolomite.
Note: For extremely sticky wet mud (e.g., wet clay) or highly abrasive large ore lumps, carbide blade scrapers or primary heavy-duty cleaners are recommended.
III. Performance Comparison: Plate Brush Cleaner vs. Traditional Scrapers
| Performance Metric | Traditional Rubber/PU Scrapers | Plate Brush Cleaner | Motorized Rotating Drum Brush Cleaner |
|---|---|---|---|
| Cleaning Action | Rigid surface scraping | Herringbone flexible bristle high-frequency sweeping | Motorized rotating cylinder brush sweeping |
| Fine Dry Powder Efficiency | Prone to material carryback (Powder slips through gaps) | Superior (Dense bristles penetrate belt surface texture) | Superior |
| Belt Splice Impact | Risk of catching and damaging belt splices | Zero damage (Flexible bristles conform to belt contours) | Low |
| Power Dependency & Energy | Zero power required | Zero power consumption (Pure mechanical stationary contact) | Requires electric motor and cable installation, ongoing energy cost |
| Maintenance Cost & Ease | Frequent total blade replacement | Single brush replacement; frame lasts >5 years | Requires motor/gearbox maintenance, higher cost |
IV. Field Installation and 2cm Tension Adjustment Rules
1. Installation Location
Select an installation location on the return belt working face near the head discharge pulley.
2. Frame and Bracket Mounting
- Mounting Plate Fixation: Secure a mounting plate (channel steel, angle steel, or metal plate thick provided on site) onto the conveyor longitudinal beam.
- Attach Mounting Brackets: Bolt the cleaner mounting brackets to the mounting plate, leaving vertical adjustment clearance. All bracket surfaces feature anti-rust powder coating.
3. Height & 2cm Lift Tension Adjustment (Critical Step)
- Initial Contact: Adjust height until the bristle tips touch the belt bottom surface evenly.
- Optimal Tension Compression: Raise the cleaner mounting height upward by 2cm, inducing slight pre-bending stress in the bristles. This achieves the ideal balance between bristle contact pressure and cleaning torque.
V. Trial Operation, Troubleshooting, and Maintenance
Clear all site tools and check that the brush plate is centered with the conveyor belt centerline prior to startup. Run the conveyor for at least 15 minutes to evaluate cleaning performance.
| Possible Problem | Potential Engineering Cause | Recommended Solution |
|---|---|---|
| Poor Cleaning Performance | 1. Bristles not firmly fitted against belt 2. Cleaner misaligned or off-center 3. Bristles severely worn | 1. Adjust dual tensioners upward to increase bristle contact 2. Re-check and correct mounting plate dimensions 3. Unbolt and replace brush plate with a new unit |
| Excessively Fast Bristle Wear | 1. Excessive fitting (Compression exceeds 2cm) 2. Material abrasiveness too high 3. Damaged or bulging belt splices | 1. Loosen tensioners to restore the 2cm optimal compression 2. Switch to carbide blade scrapers 3. Repair or smooth conveyor belt splices |
Conclusion
Combining high-strength PP baseplates, herringbone Nylon 66/copper-plated wire bristles, and a quick-change brush structure, the plate brush cleaner is an economical solution for dry bulk return belt cleaning. Adhering to the 2cm lift tension adjustment rule and conducting shutdown maintenance ensures maximum cleaning efficiency and extended belt service life.