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What Is an En-masse Conveyor (Buried Scraper Conveyor)? Structure, Working Principle, and Applications
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An en‑masse conveyor, or buried scraper conveyor, is a closed‑trough system that transports bulk materials efficiently using a chain with scrapers. The scrapers move through the material, pushing it forward as a continuous mass, which minimizes dust and spillage. Key components include the trough, chain‑scraper assembly, drive unit, and tensioning device. This technology is widely used in agriculture, mining, cement, and power industries for handling grains, coal, ash, and ores. Its benefits include high capacity, low energy use, and enclosed operation, though proper maintenance is needed to prevent wear and material buildup.
In bulk material handling industries, efficiency and reliability are paramount—and the en-masse conveyor, commonly known as a buried scraper conveyor, stands out as a pivotal solution. This equipment is designed to transport bulk materials continuously in a closed trough, with scrapers “buried” in the material to achieve high-capacity, low-loss conveyance. Let’s break down its core components, operational mechanism, and real-world uses.
Structurally, the buried scraper conveyor features four key parts. First, the trough (usually metal) forms a closed channel to contain materials and prevent spillage. Second, scrapers—fixed on a chain or belt—are the core working components, designed to fit the trough’s cross-section. Third, the chain/belt drive system, including motors, reducers, and sprockets, powers the scraper movement. Finally, feeding and discharging ports ensure smooth material infeed and outfeed, with sealed designs to avoid dust leakage.
Its working principle is straightforward yet efficient. When activated, the drive system pulls the chain/belt, moving the scrapers along the trough. As the scrapers advance, they fully contact the bulk material (hence “buried”), generating frictional force that drives the entire material bed forward as a single mass—rather than individual particles. This en-masse movement minimizes material segregation and ensures stable, uniform conveyance, even for powdery or granular materials.
The conveyor’s applications span multiple industries. It is widely used in thermal power plants to transport coal and ash, in grain processing facilities for wheat, corn, and soybeans, and in cement plants for clinker and raw materials. It also excels in handling materials like fertilizers, ores, and industrial waste, thanks to its closed structure (dust-proof, moisture-proof) and ability to work horizontally, vertically, or at an incline. Its compact design saves space, making it ideal for factories with limited layout room.
In summary, the buried scraper conveyor is a versatile, efficient tool for bulk material transport. Its robust structure, en-masse working principle, and wide adaptability make it indispensable in industries where safe, cost-effective material handling is critical.
buried scraper conveyor,en-masse conveyor
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