Antioxidant spraying device and process for seamless steel tube production

Abstract

The invention discloses an antioxidant spraying device and an antioxidant spraying process for seamless steel tube production. The spraying device comprises an annular cavity punching machine, a firstpipeline and a second pipeline, wherein the annular cavity punching machine is formed by an ejection rod with an ejection head and a roller, the middle of the ejection rod is conducted, the first pipeline and the second pipeline are arranged in a through hole of the ejection rod, one of the first pipeline and the second pipeline is used as an antioxidant pipeline, the other pipeline is used as acooling water pipeline, an outlet of the antioxidant pipeline is opposite to the inner wall of a hollow capillary, and an outlet of the cooling water pipeline is opposite to the top end of the ejection rod. According to the antioxidant spraying device and the antioxidant spraying process for seamless steel tube production, the inner wall, on which an antioxidant is not sprayed, of the hollow capillary can be prevented from making contact with air, so that the probability of defects of the inner wall of the hollow capillary is reduced, the surface quality of the inner wall of a steel tube is increased, special stations for spraying the antioxidant are reduced, and the production rhythm is increased.

Description

technical field [0001] The invention relates to the technical field of seamless steel pipe production, in particular to an antioxidant spraying device and an antioxidant spraying process used in the production of seamless steel pipes. Background technique [0002] In the production process of seamless steel pipe, after the heated solid tube blank passes through the annular cavity piercing machine with the top pin and the roll, the solid tube blank becomes a hollow capillary tube, and then the top pin with the top is removed from the hollow Then the hollow capillary is placed in a special anti-oxidant spraying station, and the anti-oxidant is sprayed into the inner wall of the hollow capillary. After spraying, the next rolling process is carried out. The effect of spraying antioxidants into the inner wall of the hollow capillary is to avoid oxidation caused by the contact between the inner cavity of the capillary and air, which will lead to defects on the inner wall of the ho...

AI Technical Summary

Problems solved by technology

Due to the long-term contact process between the hollow capillary that has not been sprayed with anti-oxidant and the air during the process from the extraction of the ejector pin to the spraying of the anti-oxidant, it may cause defects in the inner wall of the steel pipe and affect the production rhythm.

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