1. Spiral feeder:
The material weight signal from measuring screw is transmitted to 3U403 (one machine and one circuit DCS interface) or 3U600 (one machine and sixteen routes) measurement and control system (3U403 and 3U600 are all core microprocessors). By continuously comparing the set value with the actual weight of the material conveyed by the screw, the running speed of the steady flow screw is continuously adjusted. Therefore, the material flow can always be stabilized at the set value.
2. Main features:
1. Special for the measurement and control of powdery materials.
2. The feeding screw has a unique flow-stabilizing structure. The feeding powder sinks evenly in the whole section of the feed inlet and outlet. It is not easy to arch and punch.
3. Cycloid pinwheel reducer motor ensures long-term stable operation.
4. Variable pitch structure and outlet overflow mode are adopted to stabilize the flow helix, which effectively solves the problem of material punching (output > 60T/H adopts double-pipe steady flow).
5. Measuring spiral scale adopts three high precision sensors (pull force) to weigh directly, which successfully solves the errors caused by lever weighing and greatly improves the measuring accuracy.
6. Using digital acquisition module, the effective resolution is up to 1 million; acquisition rate is 50 times per second; annual drift is less than 50 PPM; temperature drift is less than 50 PPM.
7. Sealing structure to reduce dust outflow.
3. Technical Indicators
1. Measurement accuracy: <1%
2. Control accuracy: <2%
3. Speed regulation range: 10:1
4. Working methods: continuous
4. Product classification:
The screw feeder can be divided into two series according to the requirement of using environment: single-tube screw feeder and U-type LS screw feeder. The single-tube screw feeder uses sealed conveying material, which has good sealing property, can avoid dust pollution to the environment, improve working conditions, has the characteristics of stable feeding, can realize gas lock, can also eliminate the phenomenon of material reflux, and single-tube screw feeder can also be rooted. According to the use requirements, it is designed to be horizontal, inclined and vertical conveying, which can reduce the manufacturing cost of the equipment.