Burner for fabricating optical fiber preform

Abstract

A burner used for fabricating an optical fiber perform is disclosed. The burner includes a burner housing, a first body formed with a plurality of spraying ports, and a second body aligned in a length direction of the first body. At least a part of the first body is accommodated in the burner housing. At least a part of the second body is accommodated in the burner housing. An oxidizing agent is fed into the second body along an outer peripheral surface of the second body and a fuel is fed into the second body along an inner peripheral surface of the first body. The oxidizing agent is uniformly mixed with the fuel in the first body and a mixture thereof is exhausted to an exterior through the spraying ports. The fuel and the oxidizing agent are separately fed into the burner and mixed with each other in the burner, thereby preventing the backfire phenomenon. Since the mixture of the fuel and the oxidizing agent is sprayed to the exterior after the fuel has been sufficiently mixed with the oxidizing agent in the burner, it is possible to obtain the perfect combustion for the mixing gas.

1 . A burner used for fabricating an optical fiber preform, the burner comprising: 
 a burner housing;    a first body formed with a plurality of spraying ports, at least a part of the first body being accommodated in the burner housing; and    a second body aligned in a length direction of the first body, at least a part of the second body being accommodated in the burner housing,    wherein an oxidizing agent can be fed into the second body along an outer peripheral surface of the second body and a fuel can be fed into the second body along an inner peripheral surface of the first body, and    wherein the oxidizing agent is uniformly mixed with the fuel in the first body and a mixture thereof is exhausted to an exterior through at least one of the plurality of spraying ports.    
   
   
       2 . The burner as claimed in  claim 1 , wherein the oxidizing agent is introduced into the first body through an injection port formed between an end of the first body and an end of the second body.  
   
   
       3 . The burner as claimed in  claim 1 , wherein an oxidizing agent injection port is formed at a sidewall of the burner housing, and a passage is formed between an inner peripheral surface of the burner housing and an outer peripheral surface of the second body to allow the oxidizing agent to be fed into the first body through the oxidizing agent injection port.  
   
   
       4 . The burner as claimed in  claim 1 , further comprising a fuel injection port, which forms a path for feeding the fuel towards an inner peripheral surface of the second body.  
   
   
       5 . The burner as claimed in  claim 4 , further comprising a center plug inserted into the second body such that a cavity is coupled to the fuel injection port is formed between the second body and the center plug, wherein a fuel exhaust port is formed between the cavity and an end of the second body.  
   
   
       6 . The burner as claimed in  claim 5 , wherein a vacuum region is formed between the fuel exhaust port and the end of the second body as the oxidizing agent is fed into the first body so that the fuel provided in the cavity is exhausted into the vacuum region through the fuel exhaust port.  
   
   
       7 . The burner as claimed in  claim 1 , further comprising a center plug inserted into the second body and extending lengthwise along the burner housing, wherein an end of the first body is closed by an end of the center plug, and the spraying ports are formed at the end of the center plug.  
   
   
       8 . The burner as claimed in  claim 7 , further comprising a second injection port for exhausting the fuel fed into the center plug to the exterior through a center of the spraying ports.  
   
   
       9 . The burner as claimed in  claim 7 , wherein a vacuum region is formed between an outer peripheral surface of the center plug and an inner peripheral surface of the second body as the oxidizing agent is fed into the first body.  
   
   
       10 . The burner as claimed in  claim 7 , wherein the oxidizing agent is mixed with the fuel in a region formed between an outer peripheral surface of the center plug and an inner peripheral surface of the first body as the oxidizing agent is fed into the first body.  
   
   
       11 . The burner as claimed in  claim 1 , further comprising a guide housing for receiving the burner housing, the first body and the second body therein.  
   
   
       12 . The burner as claimed in  claim 11 , further comprising a second oxidizing agent injection port formed at a sidewall of the guide housing, wherein the oxidizing agent introduced into the guide housing is exhausted to the exterior through a plurality of guide holes formed around the spraying ports.  
   
   
       13 . A burner used for fabricating an optical fiber preform, the burner comprising: 
 a burner housing;    a first body including a plurality of spraying ports, at least a part of the first body being accommodated in the burner housing;    a second body aligned in a length direction of the first body, at least a part of the second body being accommodated in the burner housing where the first body is spaced from the second body  103  by a predetermined distance in order to form an oxidizing agent port therebetween; and    a fuel injection port that extends into the second body to allow the fuel to be injected through the second body and fed into the first body.    
   
   
       14 . The burner as claimed in  claim 13 , wherein the oxidizing agent port is formed along an outer circumferential portion of the second body so that a passage is formed between an outer peripheral surface of the second body and an inner peripheral surface of the burner housing in order to connect an injection port to the oxidizing agent port.  
   
   
       15 . The burner as claimed in  claim 13 , further comprising a center plug inserted into the second body such that a cavity is coupled to the fuel injection port is formed between the second body and the center plug, wherein a fuel exhaust port is formed between the cavity and an end of the second body.  
   
   
       16 . The burner as claimed in  claim 15 , wherein a vacuum region is formed between the fuel exhaust port and the end of the second body as the oxidizing agent is fed into the first body so that the fuel provided in the cavity is exhausted into the vacuum region through the fuel exhaust port.  
   
   
       17 . The burner as claimed in  claim 12 , further comprising a center plug inserted into the second body and extending lengthwise along the burner housing, wherein an end of the first body is closed by an end of the center plug, and the spraying ports are formed at the end of the center plug.