Metallurgical spray gun with replaceable gun head

Abstract

The invention discloses a metallurgical spray gun with a replaceable gun head. The gun comprises a tail pipe of the spray gun, a central pipe communicating with the tail pipe of the spray gun and an outer pipe of the spray gun sleeving outside a central pipe at intervals. The outer pipe of the spray gun is composed of a front pipe section and a back pipe section, both of which can be detachably connected. The metallurgical spray gun with the replaceable gun head has following beneficial effects: when the metallurgical spray gun is used, the front pipe section of the outer pipe of the spray gun is inserted into molten steel and the back pipe section of the outer pipe of the spray gun is located outside the molten steel; when the front pipe section is damaged due to high temperature, the damaged front pipe section is dismantled and replaced with a spare pipe section; there is no need to replace the overall spray gun; and therefore manufacturing cost is lowered.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a metallurgical spray gun with replaceable gun heads. Background technique [0002] In the iron and steel metallurgical process, spray guns are used in process operations such as argon blowing, oxygen blowing, and powder spraying into molten steel. [0003] Traditional metallurgical spray gun structure such as figure 1 As shown, it is usually an integral type, and the front end of the spray gun is a casing structure, which is mainly composed of a spray gun tail pipe 1, a mounting flange 6, a spray gun outer pipe 3 and a central pipe 2, and the spray gun outer pipe 3 is set on the periphery of the central pipe 2 And there is an annular gap with the center pipe 2 . When in use, the spray gun is fixed to the metallurgical container (vacuum tank) through the installation flange 6, the outer tube 3 and the central tube 2 of the spray gun are inserted into the molten steel, the ma...

AI Technical Summary

Problems solved by technology

[0004] Since the outer tube 3 and the central tube 2 of the spray gun are in direct contact with the molten steel, and the temperature of the molten steel is high (usually greater than 1580°C), the front end of the spray gun, especially the front end of the outer tube, is easily damaged and has a limited service life.

The traditional metallurgical spray gun has an integral structure. When the outer tube 3 and the central tube 2 of the spray gun are damaged, the spray gun needs to be replaced as a whole, but the tail pipe 1 and the mounting flange 6 of the spray gun are not damaged, which causes waste and increases the production cost.

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