| 摘要 |
The present invention relates to a radiant tube capable of evenly transmitting radiant heat to a subject by connecting the radiant tubes in multiple stages not to overlap convex and concave units while continuously forming the semicircular convex units in a predetermined section of an outer circumference of the radiant tube to compensate deformation due to expansion and continuously forming the circular concave units in a predetermined section of the outer circumference of the radiant tube to bear an internal pressure change. To achieve this, the present invention includes heating pipes in multiple stages. In the formation of the single radiant tube formed by welding both ends of heating pipes with a connecting pipe, the radiant tube is capable of compensating the extension of the heating pipes in a longitudinal direction by continuously forming the multiple semicircular convex units protruding upward from the outer circumferences of the heating pipes, compensating dent parts of the heating pipes by continuously forming the multiple circular concave units protruding inward from the outer circumferences of the heating pipes, and preventing an increased radiating area of the convex units from being focused on a side by forming the heating pipes in multiple stages to alternately place the convex and concave units. |
