High-wear-resistance bent nozzle for shot blasting machine and for interior of steel pipe, and shot blasting system of high-wear-resistance bent nozzle

Abstract

The invention discloses a high-wear-resistance bent nozzle for a shot blasting machine and for the interior of a steel pipe, and a shot blasting system of the high-wear-resistance bent nozzle. The high-wear-resistance bent nozzle is used for solving the technical problems that a bent nozzle in the prior art is poor in wear resistance, short in service life and inconvenient to maintain. The high-wear-resistance bent nozzle adopts a bent nozzle inner layer made of YG8 high-wear-resistance hard alloy and a bent nozzle outer layer made of SUS304 stainless steel. The inner wall of the bent nozzle outer layer is tightly fixed to the outer wall of the bent nozzle inner layer. The high-wear-resistance bent nozzle serves as the nozzle for ejecting steel shots in the shot blasting system. The service life of the high-wear-resistance bent nozzle is prolonged to one year from 8-10 days of a traditional bent nozzle, the cost of shot blasting equipment and the maintenance and replacement frequency of the bent nozzle are effectively reduced, the time needed for maintenance and replacement is shortened, the cost is reduced, the workload of maintenance is reduced, the time needed for shutdown for maintenance is shortened, the production efficiency of removing oxide skin through shot blasting is improved, the use cost of equipment is reduced, it is guaranteed that the oxide skin on the inner wall of the steel pipe is completely removed through shot blasting, and then the subsequent saponification and phosphorization effects and the cold-drawing quality of the steel pipe are ensured.

Description

technical field [0001] The invention belongs to the technical field of steel pipe internal shot peening machine processing equipment, and in particular relates to a high wear-resistant curved nozzle for a steel pipe internal shot peening machine and a shot peening system thereof. Background technique [0002] During the cold drawing process, the steel pipe needs to be saponified first. Before the saponification of the steel pipe, the scale on the inner wall of the steel pipe needs to be removed so that the inner wall of the steel pipe can fully contact with the saponification liquid and adhere evenly. There are quality problems such as cracks and breakage during the pulling process. To remove scale before saponification of steel pipe, high-speed shot blasting is generally used to spray the inner wall of steel pipe to remove scale on the inner wall. High-speed shot blasting is sprayed through the curved nozzle. The traditional curved nozzle is integrally cast with high manga...

AI Technical Summary

Problems solved by technology

High-speed shot blasting is sprayed through the curved nozzle. The traditional curved nozzle is integrally cast with high manganese steel. Under the blowing of compressed air, the steel shot is blown to the inner wall of the steel pipe through the nozzle. The steel shot continuously cuts the inner wall of the curved nozzle, and the inner wall of the curved nozzle quickly Wear and tear, the diameter becomes larger, resulting in a drop in shot peening speed, unable to effectively remove the oxide layer on the inner wall of the steel pipe, and the curved nozzle must be replaced

According to our actual use statistics, the average service life of the traditional curved nozzle is 8-10 days, and the curved nozzle is connected to the high-speed shot pipe by welding. The high-speed shot pipe is made of SUS304 stainless steel. The welding of the two is not easy. easy to break

The fragile problem of the traditional curved nozzle causes a large maintenance workload, long downtime for failures, and a decrease in production efficiency. At the same time, it causes the oxide scale on the inner wall to be removed uncleanly, and the saponification and phosphating effects are poor, which brings more quality to the final steel pipe cold drawing work. question

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