What optimizations have been made to dual-tube screw feeders?

Screw feeders are devices that use spiral tubes to convey materials, simultaneously performing functions such as material weighing and quantitative feeding during the conveyance process. They are particularly suitable for on-site production ingredient proportioning and are widely used across industries including chemicals, metallurgy, building materials, and cement.

Screw feeders employ sealed spiral tubes, which prevent material spillage and dust generation at the production site, aiding in material conservation and production environment optimization. However, due to their sealed spiral tube structure and environmental factors such as vibration from large machinery and storage capacity of material bins, the precision of their measurement and control, as well as their cleanliness, can be easily affected, resulting in less accurate measurement in practical applications.

For single-tube screw feeders, after the material falls from the discharge port, conveyance and measurement are completed within the same tube. The material experiences a buffering period after falling, and this material impact can affect measurement, causing fluctuations in the screw feeder's operating fill rate and feed rate. This, in turn, leads to frequent variations in the feed amount, impacting the accuracy of ingredient proportioning and, consequently, the quality of the produced products.

In some production environments, dust is inevitable, and screw feeders are invariably affected by it. Material accumulation corrodes the spiral tube, while dust accumulation impacts sensors. This not only affects measurement accuracy but also reduces equipment lifespan and increases maintenance workload.

Traditional screw feeders require frequent calibration, typically once a month. In facilities with numerous such devices, the maintenance workload is significant. Calibration often necessitates adjusting production schedules, emptying material bins, and halting operations. During periods of high production demand, halting operations for calibration impacts productivity, while continuing operations without calibration compromises measurement accuracy and, subsequently, product quality.

Guonuo Technology, a specialized manufacturer of industrial bulk material measurement and industrial automation control systems, has addressed the challenges faced by screw feeders in production through various optimizations and improvements in overall structure, connection methods, and component technology.

In terms of structure, Guonuo Technology has replaced the single-tube spiral with an upper and lower dual-spiral structure. The upper spiral regulates speed and stabilizes flow, while the lower spiral performs weighing and measurement. The separation of the speed regulation and stabilization unit from the weighing and measurement unit mitigates the impact of material bin levels on the screw feeder. The lower spiral tube, responsible for weighing and measurement, maintains a stable and consistent material flow, avoiding material impact and naturally enhancing measurement accuracy.

Regarding connections, the dual-tube screw feeder employs flexible connections between the material bin and the upper spiral tube, as well as between the upper and lower spiral tubes, improving equipment operational conditions. Additionally, altering the installation method of the screw feeder, such as using independent supports or suspension, reduces the impact of environmental vibrations on the feeder.

In terms of component technology, digital sensors are used for more accurate and stable signals. The instruments are equipped with high-performance processors that apply various compensation techniques to improve measurement accuracy, perform real-time calculations, and ensure precise control. Given the inevitability of material dust in production environments, both sensors and instruments adopt sealed structures with high-quality housings and special seal designs to prevent dust accumulation from affecting measurement and equipment performance.

Through a series of improvements and optimizations to the screw feeder, as well as enhancements in the installation of new equipment, the dual-tube screw feeder has significantly enhanced its operational stability, measurement accuracy, durability, and application effectiveness. It meets various production and application needs, improves production automation levels, and contributes to enhanced production efficiency and quality.