Tubular Burner

Abstract

A tubular burner has a mixing tube which includes a rear-end inlet port into which a fuel gas and primary air flow, and a flame hole member having a plurality of flame holes and being fitted into a front end region of the mixing tube. The flame hole member is prevented from getting pulled out of position, without applying an undue force thereto. At a front end of the mixing tube a cylindrical elongated section is disposed in a manner to be elongated beyond a front face of the flame hole member. A convex portion is formed in the cylindrical elongated section so as to protrude diametrically inward of the cylindrical elongated section to prevent the flame hole member from getting pulled out of position in a forward direction.

What is claimed is: 
     
         1 . A tubular burner comprising:
 a mixing tube inclusive of a rear-end inlet port into which a fuel gas and primary air flow, and a flame hole member having a plurality of flame holes and being fitted into a front end region of the mixing tube, such that a mixture of the fuel gas and primary air is ejected from these flame holes to perform combustion,   wherein a cylindrical elongated section which is elongated beyond a front face of the flame hole member is disposed at a front end of the mixing tube, and   wherein the cylindrical elongated section has a convex portion which protrudes diametrically inward of the cylindrical elongated section such that the flame hole member is prevented from getting pulled out of position in a forward direction.   
     
     
         2 . The tubular burner according to  claim 1 , wherein the mixing tube has a second convex portion which is formed adjacent to the portion into which the flame hole member gets fitted, the second convex portion being arranged such that a rear-end outer periphery of the flame hole member comes into contact with the second convex portion from the front side rearward.