Vortex pressurized burner

Abstract

The present invention discloses a vortex pressurized burner. The vortex pressurized burner adopts a gradually reduced volute flow passage to make a pressure difference of a volute flow passage from a gas passage head end to a gas passage tail end smaller, so that the jetted gas is more uniform, increasing the uniformity of circumferential combustion of flames.

What is claimed is: 
     
         1 . A vortex pressurized burner, comprising: a burner body, provided with a volute flow passage and a plurality of gas outlet passages;
 wherein the volute flow passage is provided with a gas passage head end and a gas passage tail end, and the gas passage tail end is cut off, so that a gas flow entering the volute flow passage via the gas passage head end can be stopped at the gas passage tail end from entering the gas passage head end, and the cross-sectional shape of the volute flow passage is gradually reduced from the gas passage head end to the gas passage tail end; and   all of the plurality of gas outlet passages are arranged along an extending direction of the volute flow passage to form an annular gas outlet area, and each of the gas outlet passages communicates with the volute flow passage.   
     
     
         2 . The vortex pressurized burner according to  claim 1 , wherein the annular gas outlet area is arranged at the volute center of the volute flow passage, and is gradually reduced from bottom to top. 
     
     
         3 . The vortex pressurized burner according to  claim 2 , wherein each of the gas outlet passages is formed by spirally extending along an inclined direction of the annular gas outlet area, so that a gas outlet of each of the gas outlet passages is located at an upper port of the annular gas outlet area. 
     
     
         4 . The vortex pressurized burner according to  claim 2 , wherein the cross-sectional shape of each of the gas outlet passages is gradually reduced from a gas inlet to gas outlet of the gas outlet passage; and/or
 the cross-sectional shape of the volute flow passage is gradually reduced from the lower end to the upper end thereof.   
     
     
         5 . The vortex pressurized burner according to  claim 1 , wherein an included angle between the axis of an extending direction of each of the gas outlet passages and the volute axis of the volute flow passage is an acute angle. 
     
     
         6 . The vortex pressurized burner according to  claim 3 , wherein the gas outlets of all the gas outlet passages are arranged in the inner wall of the upper port of the annular gas outlet area in an annular or volute form;
 the burner body comprises a volute portion, wherein the inner circumference of the volute portion is provided with a clear cavity, and the annular gas outlet area is formed by being continuously arranged along the edge of an upper port of the clear cavity; and   the burner body is provided with a gradually reduced upward protective section located over the annular gas outlet area, and the upper end of the protective section circumferentially defines a flame outlet.   
     
     
         7 . The vortex pressurized burner according to  claim 1 , further comprising a flame-gathering cover sleeved on the upper end of the annular gas outlet area,
 wherein the inner circumference of the flame-gathering cover is cylindrical, or the inner circumference of the flame-gathering cover is shaped like a truncated cone which is gradually reduced upwards.   
     
     
         8 . The vortex pressurized burner according to  claim 7 , wherein the circumferential wall of the flame-gathering cover is provided with a plurality of air supply holes through which the inside of the flame-gathering cover communicates with the outside,
 wherein the plurality of air supply holes are arranged at intervals along a circumferential direction of the flame-gathering cover, and/or   the air supply holes are inclined upwards along a direction from the gas passage head end to the gas passage tail end of the volute flow passage.   
     
     
         9 . The vortex pressurized burner according to  claim 1 , wherein the volute flow passage is provided with an inner flow passage wall and an outer flow passage wall, wherein the inner flow passage wall is annularly arranged, the outer flow passage wall is located at the periphery of the inner flow passage wall, the outer flow passage wall gradually approaches the inner flow passage wall from the gas passage head end to the gas passage tail end, and the gas outlet passages are arranged at intervals on the top of the inner flow passage wall along a circumferential direction of the inner flow passage wall; and
 the volute flow passage is provided with an upper flow passage wall and a flow-increasing sidewall, wherein the upper flow passage wall is inclined upwards from one side of the outer flow passage wall to one side of the inner flow passage wall, the flow-increasing sidewall is arranged at one end of the gas passage tail end, and is located between the upper flow passage wall and the outer flow passage wall, and the flow-increasing sidewall is arranged in an outwardly arched arc shape.   
     
     
         10 . The vortex pressurized burner according to  claim 1 , wherein an injection passage is arranged in the burner body, wherein one end of the injection passage is connected with the gas passage head end, and an extending direction of the injection passage is arranged tangent to the extending direction of the volute flow passage; and
 a distance between the injection passage and the volute center of the volute flow passage is s (8 mm≤s≤12 mm).