Gas burner nozzle

Abstract

The invention relates to a gas burner nozzle for flame work, with a central oxygen supply consisting of several pipes ( 13 ) and with several pipes ( 11, 12 ) arranged around the aforementioned oxygen supply for the supply of fuel gas. According to the invention, the pipes for the oxygen supply are arranged in groups, with the individual groups arranged coaxially and at a distance from each other, and with each group consisting of at least two rows of pipes arranged in the form of concentric rings.

1 . A gas burner nozzle for flame treatment operations with a central oxygen feed which comprises a plurality of tubes, and with a plurality of tubes for the fuel gas feed which are arranged around the oxygen feed. wherein the tubes for the oxygen feed are arranged in groups in each case, wherein the individual groups [[( 11 ,  12 ,  13 )]] are arranged coaxially and a distance apart from each other, and each group [[( 11 ,  12 ,  13 )]] comprises at least two annularly arranged rows of tubes. 
   
   
       2 . The gas burner nozzle as claimed in  claim 1  wherein there are three groups [[( 11 ,  12 ,  13 )]] of tubes for oxygen feed. 
   
   
       3 . The gas burner nozzle as claimed in  claim 1  wherein each individual tube for oxygen feed has an outlet inside diameter of 6 to 12 mm. 
   
   
       4 . The gas burner nozzle as claimed in  claim 1  wherein each group of feed lines has a separate gas feed control facility. 
   
   
       5 . The gas burner nozzle as claimed in  claim 1  wherein individual tubes of a group are combined to form a sub-group which form in each case a one-piece body which is arranged in the gas burner nozzle preferably in an exchangeable manner. 
   
   
       6 . The gas burner nozzle as claimed in  claim 1  wherein the groups of tubes are arranged in an end piece which is connected to a front block which has three pre-chambers [[( 16 ,  17 ,  18 )]] for oxygen feed which are arranged coaxially to each other and connected in each case to the tubes of one of the groups [[( 11 ,  12 ,  13 )]]. 
   
   
       7 . The gas burner nozzle as claimed in  claim 1  wherein the gas feed tubes consist of copper. 
   
   
       8 . The gas burner nozzle as claimed in  claim 1  wherein the outside diameter is 250 to 400 mm. 
   
   
       9 . The gas burner nozzle as claimed in  claim 1  wherein each tube for oxygen feed is formed as a combination of a Laval nozzle [[( 100 )]] with a cylindrical tube [[( 101 )]]. 
   
   
       10 . The gas burner nozzle as claimed in  claim 9  wherein the length [[(L 2 )]] of the first section [[( 121 )]] is shorter than the length [[(L 3 )]] of the second section [[( 122 )]] and/or of the third section [[( 123 )]]. 
   
   
       11 . The gas burner nozzle as claimed in  claim 1 ,  wherein the diameter of the three sections, and also their lengths, are matched to each other so that the gas flows out at the nozzle discharge end in pulse form. 
   
   
       12 . The gas burner nozzle as claimed in  claim 11  wherein the impulse frequency at the nozzle discharge end is 100 to 650 Hz. 
   
   
       13 . The gas burner nozzle as claimed in  claim 1  wherein the maximum gas flow velocity in each tube is Mach 2 [[(equal to twice the speed of sound)]].