Sandblasting nozzles can be divided into: straight hole sandblasting nozzles, venturi sandblasting nozzles, double venturi sandblasting nozzles, angled sandblasting nozzles
Straight hole nozzle: There are only contraction section and straight section inside, the structure is simple and easy to manufacture. This kind of nozzle cannot overcome the vortex phenomenon existing at the inlet, and the pressure loss is large; the abrasive velocity at the outlet is less than 100m/s under the condition of 0.7MPa pressure.
Venturi nozzle: The internal structure of the venturi nozzle is a contraction section, a straight section and a divergent section, which is difficult to manufacture. The dynamic performance of the venturi nozzle is better than that of the straight hole nozzle, the vortex phenomenon is obviously improved, and the pressure loss is obviously reduced. Under the same pressure conditions, the outlet speed of abrasives from straight-hole nozzles is more than doubled, the work efficiency is increased by 15-40%, and the abrasive consumption is reduced by 20%.
Double Venturi nozzle: Double Venturi sandblasting nozzle is composed of two nozzles at the front and back. Due to the action of high-speed airflow, a negative pressure is generated and the surrounding air is sucked into the nozzle; the amount of air ejected is greater than the amount of air sucked in. The blasting area of the double venturi nozzle is 35% higher than that of the venturi nozzle, and the outlet speed of the blasting medium is reduced. This type of nozzle is often used for large-area and medium-strength surface treatment.
Angle nozzle: Change the direction of movement of the abrasive. It can be used to clean the truss of steel structures such as bridges and iron towers, the back of flanges, the inner surface of rigid pipes and other parts that are difficult to clean. There are 1, 2, and 3 holes for angle nozzles. The angle between the center line of the hole and the axis of the nozzle is 45 degrees/90 degrees/135 degrees, which can meet the needs of different construction sites and different shapes of workpieces. .
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