Spiral Scraper Conveyor

The spiral scraper conveyor is a specialized equipment centered around a spiral mechanism, designed for the gathering, collecting, and conveying of bulk materials (such as sand, gravel, coal, grain, wood chips, etc.). Through the rotation of the spiral, it efficiently gathers materials, and in coordination with a conveyor belt, completes transfer or loading operations. It is widely used in bulk material handling scenarios in industries such as mining, construction materials, agriculture, and coal.

I. How Does a Spiral Scraper Conveyor Work?
The spiral scraper conveyor achieves its functionality through the coordinated operation of mechanical, hydraulic, and electrical systems:
1. Core Component: The spiral mechanism (single or double spiral design) is the core, driven by a motor or hydraulic motor to rotate the spiral shaft, with spiral blades gathering, mixing, and directing materials toward the center.
2. Conveyor System: Equipped with a belt conveyor to receive materials delivered by the spiral, facilitating subsequent transfer (e.g., to a crusher) or direct loading.
3. Control and Adjustment System: The hydraulic system controls the lifting and angle adjustment of the spiral mechanism to adapt to material piles of varying heights and shapes; the electrical system enables automated operation (e.g., speed adjustment, start/stop, fault monitoring), and some models are equipped with tracked or wheeled mobility devices for flexible movement within the material pile area.

II. Advantages of the Spiral Scraper Conveyor
Compared to traditional bulk material handling equipment (such as loaders or manual scraping), the spiral scraper conveyor offers significant advantages:
1. High-Efficiency Integrated Operation: Achieves a seamless "scraping-conveying" process, with operational efficiency 5-8 times higher than manual labor and 3-5 times higher than loaders, particularly suitable for continuous production in large-scale material yards.
2. Strong Material Compatibility: Capable of handling various bulk materials such as sand, gravel, coal, grains, and wood chips, with good adaptability to material particle size (from fine powder to small lumps) and moisture (within a certain range). For example, in wet coal yards, the spiral scraper conveyor is less prone to material sticking, whereas loaders often face insufficient power issues.
3. Operational and Cost Advantages: High automation requires only 1-2 operators; primarily electric-driven, it has low energy consumption, with maintenance costs only one-third of those for loaders of the same capacity, offering significant long-term economic benefits.
4. Superior Site Adaptability: Compact equipment size allows operation in confined material yards; the lifting and angle adjustment functions of the spiral mechanism adapt to material piles of different heights and shapes without requiring pre-arrangement of the pile.

III. Applications of the Spiral Scraper Conveyor
The spiral scraper conveyor is widely used in industries such as quarries, sand and gravel plants, coal mines, grain warehouses, and biomass fuel plants, capable of handling materials including:
1. Sand and gravel aggregates, coal, coal powder, coal gangue;
2. Grains such as wheat, corn, and rice;
3. Bulk materials like wood chips, organic fertilizer raw materials, and slag.

IV. Application Scenarios
1. Sand and Gravel Construction Materials Industry:In sand and gravel yards, the spiral scraper conveyor gathers stockpiled aggregates and conveys them to crushers or loading platforms, achieving a seamless "stockpiling-gathering-processing/transfer" process. For example, in a large concrete mixing plant yard, adopting a spiral scraper conveyor improved the continuity of aggregate supply, increasing concrete production efficiency by 20%.
2. Coal Industry:In coal mine surface yards or coal washing plants, the spiral scraper conveyor is used to gather raw coal, clean coal, or coal gangue, conveying them to screening equipment or loading systems. It addresses the low efficiency of manual scraping and high dust generation from loaders, while also avoiding difficulties in accessing compacted coal.
3. Grain Storage Industry:In grain warehouses, the spiral scraper conveyor gathers stockpiled grains such as wheat and corn for transfer or redistribution. Compared to manual grain scraping, it not only improves efficiency but also reduces grain loss due to mold or pest-infested areas, enabling precise gathering.

V. How to Choose the Right Spiral Scraper Conveyor
To ensure the equipment meets needs and is cost-effective, consider the following aspects:
1. Material and Capacity Requirements: Specify the type of material to be processed (particle size, moisture, stickiness) and hourly scraping capacity (e.g., 50 t/h, 200 t/h) to determine core parameters such as spiral diameter, pitch, and motor power. For example, for sticky wet coal, ｓｅｌｅｃｔ a model with wear-resistant blades and high torque.
2. Site and Operating Conditions: Measure the material yard space (width, height) and ground load-bearing capacity. Choose compact wheeled models for narrow yards and tracked models for soft ground to enhance mobility.
3. Budget and Long-Term Costs: Compare acquisition costs, operational energy consumption (electricity usage), and maintenance cycles (e.g., frequency of spiral blade replacement), prioritizing brands with high cost-performance and robust after-sales service (focusing on spare parts availability and repair response speed).
4. Consult Professional Manufacturers: It is recommended to communicate with bulk material equipment manufacturers with R&D and production capabilities, providing material yard data for customized solutions to ensure complete compatibility with operational conditions.