Torch extension

Abstract

A torch extension used for home barbecue, comprising a tubular body with a cylindrical shape and a connection head, the tubular body and the connection head are integrated, the tubular body has a rear inlet connected with the connection head and through which a fuel enters the tubular body to create a flame when the fuel is ignited. A diffusion trajectory of the flame in the tubular body with a cylindrical shape is basically conical, an interior part of the tubular body keeps a certain distance from the flame, and the frame has an increasing cross-sectional area with the diffusion of the flame.

1 . A torch extension, comprising a tubular body with a hollow cylindrical shape and a connection head, the tubular body and the connection head are attachable to each other, the tubular body has a central rear inlet corresponding to and separated from the connection head and through which a fuel enters the tubular body from outside to create a flame when the fuel is ignited,
 wherein an external part of the connection head has an adjustable fastener, and the adjustable fastener is tightened when an adjustable collar is stuck in position inside the connection head to fix the adjustable collar in the connection head,   there is a gap between the central rear inlet of the tubular body and the connection head, and there is no liner of thermal insulation inside the tubular body.   
     
     
         2 . The torch extension of  claim 1 , wherein the connection head is of a tubular structure with a cylindrical shape, with a diameter same as or close to that of the rear inlet. 
     
     
         3 . The torch extension of  claim 1 , wherein a diffusion trajectory of the flame in the tubular body is basically conical, an interior part of the tubular body keeps a certain distance from the flame, and the flame has an increasing cross-sectional area with the diffusion of the flame. 
     
     
         4 . The torch extension of  claim 1 , wherein the torch extension further comprises a bracket mounted exteriorly on and around the tubular body and the connection head, which comprises a plurality of horizontal rings and a plurality of rods, an upper part of each rod is composed of a vertical rod and is used for connecting a plurality of horizontal rings, and a lower part of each rod is composed of a plurality of broken line rods and is used for connecting the tubular body and the connection head. 
     
     
         5 . The torch extension of  claim 4 , wherein a lower part of each rod comprises three broken line rods, wherein a first broken line rod is mounted on the connection head along a vertical direction, a second broken line rod is partially mounted on a bottom of the tubular body along a horizontal direction, and partially extends outward from the bottom of tubular body to connect with the upper part of each rod, a third broken line rod is connected to the first broken line rod and the second broken line rod. 
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
         8 . The torch extension of  claim 1 , wherein the torch extension has an openwork wire mesh detachably connected to an outlet end of the tubular body, and four screws are arranged at equal intervals on an external surface of the outlet end of the tubular body to fix the openwork wire mesh. 
     
     
         9 . A torch, comprising a canister, a fuel delivery tube, an adjustable collar, and the torch extension of  claim 1 . 
     
     
         10 . The torch of  claim 9 , wherein a diffusion trajectory of the flame in the tubular body with a cylindrical shape is basically conical, an interior part of the tubular body keeps a certain distance from the flame, and the flame has an increasing cross-sectional area with the diffusion of the flame. 
     
     
         11 . The torch of  claim 8 , wherein the openwork wire mesh is arranged in a plane oblique to that of an end of the tubular body that the fuel enters.