Common precautions for spiral scale applications:
1. Reasonably select the specifications and models of the spiral scale based on the specific flow and characteristics of the material. The representative dimensions of the spiral scale are the diameter of the spiral blade and the size of the inlet and outlet. The diameter of the spiral blade is selected according to the specific flow rate, and the length of the inlet and outlet should ensure that the material does not run away. , no blocking of materials and sufficient instantaneous measurement load, which facilitates relatively stable sampling and measurement. Too long or too short will have adverse effects.
2. Select the spiral structure based on the material characteristics. Usually the size of the spiral structure of domestic spiral scales is fixed, which has weak adaptability to different processing conditions and different material characteristics. The editor thinks that it should be based on the flow, viscosity, and weight of the material. Depending on the characteristics and length of the spiral tube, select the spiral configuration and size.
Spiral blades are divided into structural modes such as equal pitch, variable pitch, variable blade diameter, variable shaft diameter and double screw blades. Which structural mode should be selected according to the specific material characteristics and condition requirements. It should not be static, let alone the selection of variable blades. The pitch, etc. are considered "advanced" and should be adapted to the "local" conditions. For example, for purgative powders with very good fluidity and no significant backdraft problems, there is no need to use variable pitch.
3. As mentioned above, short spiral scales should be updated. Long spiral scales are divided into "full load type" and "cantilever support structure" with suspension or lower support structure. The editor thinks that the elastic spring-supported cantilever structure spiral scale is more suitable. Stable and reliable, with strong adaptability and good measurement precision, it should be given priority.
4. The flow state of powder materials is greatly affected by the material characteristics and system processing environment as well as their changes. Therefore, it is very important to ensure that the materials at each stage of the process system are continuously balanced and stable to avoid collapsing and flushing materials. For applications that require high metering precision In the application stage, in addition to the special processing of the spiral scale, the system is equipped with an "online" weighing calibration warehouse or "offline" calibration equipment to prepare for regular verification and adjustment of the precision status of the spiral scale.
