Secondary atomization fan nozzle and paint sprayer special for cast pipe

Abstract

The invention discloses a secondary atomization fan nozzle and a paint sprayer special for a cast pipe. The current primary atomization nozzle is changed into such a structure that the top is provided with a secondary atomization air outlet and the top surface of a valve core is higher than the bottom surface of an angle-shaped atomization block. The paint sprayer has the advantages that the atomization quality of the nozzle can be effectively improved, the service life of the valve core can be prolonged; the fan nozzle with the function of secondary atomization is applied to the paint sprayer special for the cast pipe, then a plurality of nozzles can be used in parallel owing to the fan-shaped spraying, and the paint sprayer also has the advantage that: the spraying efficiency of a paint special for the cast pipe on the inner wall of a pipe die can be effectively increased, the spraying quality of a paint coating special for the cast pipe can be improved, the outer wall quality of a nodular cast iron pipe is further improved and the production efficiency of the nodular cast iron pipe is increased.

Description

technical field [0001] The invention relates to a secondary atomization fan-shaped and cast pipe special paint spraying machine. Background technique [0002] As ductile iron pipes are more and more widely used in national key water and gas transmission projects and exported to international markets, especially large-diameter products have competed with internationally advanced products. Existing ductile iron pipes are generally produced by centrifugal method. The specific production process is to spray special paint for cast pipes on the inner wall of the pipe mold first, then pour molten iron into the high-speed rotating pipe mold, and then spray paint on the inner wall of the pipe mold (tool). A self-propelled spraying mechanism is often used for special coatings for cast pipes. Most of the nozzles used in the spraying mechanisms used by existing spraying machines have only one atomization, and the atomization effect is not ideal. The spraying particles of special coating...

AI Technical Summary

Problems solved by technology

Existing ductile iron pipes are generally produced by centrifugal method. The specific production process is to spray special paint for cast pipes on the inner wall of the pipe mold first, then pour molten iron into the high-speed rotating pipe mold, and then spray paint on the inner wall of the pipe mold (tool). A self-propelled spraying mechanism is often used for special coatings for cast pipes. Most of the nozzles used in the spraying mechanisms used by existing spraying machines have only one atomization, and the atomization effect is not ideal. The spraying particles of special coatings for cast pipes are relatively large. Not only the coating quality is poor, but also raw materials are wasted. At the same time, because the atomization surface of most nozzles is hollow cone, it is not suitable for parallel arrangement, and the production efficiency is low.

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