| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiant tube of high strength capable of being manufactured at low costs by reducing joining portions of ceramic tubular members and kinds of tubular members, with respect to a manufacturing method of double-curved radiant tube such as the W-shaped radiant tube, made of ceramic, and a radiant tube burner comprising the radiant tube. SOLUTION: A plurality of ceramic U-shaped tubular members 11 formed by integrally molding curved tubular portions 11b disposed in curved tube areas and straight tube portions 11a disposed in straight tube areas connected with the curved tube areas, are successively joined while alternately reversed to constitute the double-curved shape. COPYRIGHT: (C)2007,JPO&INPIT
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