Crusher industry in the country is still an emerging industry, belongs to the early stage of development, but from this short decades of experience, the speed is still relatively fast, especially the universal crusher, its application field continues to expand, suitable for pharmaceutical, chemical, metallurgy, food, construction and other industries.
It is understood that the universal crusher adopts the impact crushing method, after the material enters the crushing chamber, it is impacted by the six active hammers of high-speed rotation, and crushed by the tooth ring and the material impact each other, and the crushed material enters the powder bag through the screen with the help of the air flow, leaving no residue. It has the advantages of high efficiency, low noise, reliable working performance and product quality, safe operation, drug hygiene and small loss.
And in recent years, with the improvement of technology, the universal Chinese medicine grinding unit has a simple structure, strong, smooth operation, and good grinding effect, and the inner wall of the casing has been machined to achieve smooth surface, changing the phenomenon of rough inner wall and powder accumulation of the previous models, so that the production of drugs, food, chemical industry and other products is more in line with national standards and meet the requirements of GMP.
However, in the process of use, the universal crusher blockage is one of the common failures in the use of the crusher, there may be problems in the design of the machine, but more due to the use of improper operation caused.
(1) The feed speed is too fast, the load increases, and the blockage is caused. In the feeding process, we should always pay attention to the ammeter pointer deflection Angle is large, if the rated current is exceeded, it indicates that the motor is overloaded, long-term overload will burn the motor. In this case, the feed door should be reduced or closed immediately, and the feeding method can also be changed to control the feed amount by increasing the feeder. Due to the high speed of the universal grinder, the load is large, and the load volatility is strong. Therefore, the current of the mill is generally controlled at about 85% of the rated current.
(1) The discharge pipe is not smooth or the feed is blocked too fast, which will make the universal crusher tuyere clogged; Improper matching with the conveying equipment will cause the wind of the discharge pipeline to weaken or block after no wind. After finding out the fault, it should first clear the delivery port to change the mismatched conveying equipment, adjust the feed amount, so that the equipment can operate normally.
(3) Hammer fragment, aging, screen hole closure, tattered, crushed material water content is too high will make the universal crusher blocked. The broken and seriously aging hammer should be regularly updated to maintain the good working condition of the mill, and the screen should be regularly checked, so that the production efficiency can be improved, and the universal mill is not blocked, and the reliability of the mill work can be enhanced.
Experts believe that the development direction of universal mill should be to reduce extrusion pressure, improve roll speed, multi-stage grinding and achieve closed circuit complete grinding operation combined with classifier. Therefore, the research and application of new ultrafine mill is the development trend of mill production enterprises to save energy and reduce consumption.
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