2results about How to "Strong cavitation effect" patented technology

The application discloses a recycling concrete aggregate strong washing and impregnation strengthening integrated device and a preparation method. The device comprises a liquid tank and an electric push rod fixed on the upper surface of the liquid tank. The upper end of the electric push rod is fixed with a support frame. The lower surface of the support frame is fixed with a connecting rod. The lower end of the connecting rod is fixed with a water-permeable plate. Two groups of adjusting assemblies are symmetrically arranged in the liquid tank. The adjusting assemblies are connected with the connecting rod on one side of the support frame. An ultrasonic dispersing machine is arranged on the inner wall of the liquid tank. The water-permeable plate is provided with a plurality of water-permeable holes. The device can lift the treated aggregate from the liquid tank and pour it into a subsequent screen tank for screening. The mud powder and weak mortar on the surface of the aggregate can be efficiently stripped by the ultrasonic dispersing machine. The device not only avoids secondary damage caused by mechanical methods, but also avoids the negative influence of acid root ions on the pH value. In addition, no additional chemical reagent is needed, and the operation cost is reduced.

The application discloses an ultrasonic dust removal device and a screen printing equipment, which are used for removing the impurities on the surface of a silicon wafer on a conveying belt of the screen printing equipment. The ultrasonic dust removal device comprises an ultrasonic air knife, the ultrasonic air knife comprises a first end and a second end, the first end is provided with an air outlet, the air outlet is arranged towards the conveying belt, the ultrasonic air knife is arranged obliquely, along the conveying direction of the conveying belt, the ultrasonic air knife gradually moves away from the conveying belt from the first end to the second end, and a dust collector is arranged upstream of the ultrasonic air knife along the conveying direction of the conveying belt, and the dust collector is used for adsorbing the impurities stripped by the ultrasonic air knife. The high-frequency vibration and cavitation effect of the ultrasonic air knife can improve the removal capacity of the micro-particles, avoids scratching the surface of the silicon wafer, the dust collector prevents the impurities from spreading in the working environment, the effective removal of the impurities on the surface of the silicon wafer reduces the abrasion of the printing screen caused by the impurities, reduces the probability of occurrence of the bad phenomenon, thereby prolongs the service life of the printing screen and improves the production efficiency.