Radiant tube apparatus and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-12281371-B2
Application number	US-202017785698-A
Country	US
Kind code	B2
Filing date	Nov 25, 2020
Priority date	Dec 17, 2019
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

The present invention relates to a radiant tube apparatus disposed in a heat treatment facility to perform a heat treatment of a strip and a method for manufacturing the same. The radiant tube apparatus includes a tube having an internal pipe, wherein the tube has a first continuous pattern and a second continuous pattern extending side by side and spaced apart from each other at a predetermined distance on a surface, and, in each of the first continuous pattern and the second continuous pattern, a plurality of unit patterns having a predetermined height from the surface are connected to each other in a longitudinal direction.

First claim

The invention claimed is:

1. A radiant tube apparatus comprising:
a tube having an internal pipe,
wherein:
the tube has a first continuous pattern and a second continuous pattern extending side by side in a longitudinal direction and alternatively positioned in a transverse direction on a surface of the tube,
in the first continuous pattern, a plurality of first unit patterns having a first predetermined height from the surface are sawtooth-shaped and are connected to each other in the longitudinal direction of the tube, causing the first continuous pattern to have a zigzag shape,
in the second continuous pattern, a plurality of second unit patterns having a second predetermined height from the surface are linear and are connected to each other in the longitudinal direction, causing the second continuous pattern to have a bar shape, and
the first predetermined height and the second predetermined height are 3 mm or greater and a height/thickness ratio of the first unit pattern and the second unit pattern is 1.0 or greater.

2. The radiant tube apparatus of claim 1 , wherein:
the tube includes
a plurality of straight pipe portions extending in a straight line; and
a curved pipe portion coupled to an end of the straight pipe portion so that the plurality of straight pipe portions are positioned to be parallel.

3. A method for manufacturing the radiant tube apparatus according to claim 1 by printing the first continuous pattern and the second continuous pattern on the surface of the tube through a three-dimensional modeling method.

4. A method for manufacturing the radiant tube apparatus according to claim 1 by welding the first continuous pattern and the second continuous pattern on the surface of the tube through any one method among a cold metal transfer (CMT), a tungsten inert gas (TIG), and a metal inert gas (MIG).

Assignees

• Posco
• Res Inst Ind Science & Tech

Inventors

• Ha Won
• Lee Mok Young

Classifications

• F27B2009/3638

  Heaters located above and under the track · CPC title

• F23C2900/03009

  Elongated tube-shaped combustion chambers · CPC title

• F23C3/002 Primary

  the chamber having an elongated tubular form, e.g. for a radiant tube · CPC title

• C21D1/34

  Methods of heating (C21D1/06 takes precedence) · CPC title

• F23D14/151

  with radiation intensifying means other than screens or perforated plates · CPC title