Apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas

Abstract

An apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas is disclosed. The apparatus of the present invention includes a mounting pipe ( 100 ), which is fitted over the end of an exhaust gas pipe of an internal combustion engine and has therein backflow gas guide holes ( 102 ) at positions adjacent to the exhaust gas pipe, and a secondary exhaust gas pipe ( 110 ), which surrounds the mounting pipe. In the apparatus, a backflow passage ( 120 ) is defined between the mounting pipe and the secondary exhaust gas pipe, so that a backflowing portion of exhaust gas, which is discharged from the mounting pipe, is drawn into the backflow passage and is guided into the mounting pipe through the backflow gas guide holes, and the guided backflow gas is discharged outside again. Therefore, the present invention prevents backflow gas from being drawn into the exhaust gas pipe, thus enhancing the performance of the internal combustion engine.

1 - 10 . (canceled) 
     
     
         11 . An apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas, comprising:
 a mounting pipe having a structure that is fitted over one of an end of an exhaust gas pipe extending from an internal combustion engine and an end of a gas flue of a boiler, such that a part of the mounting pipe protrudes outwards from the end of the exhaust gas pipe, the mounting pipe being hollow, such that an interior thereof communicates with the exhaust gas pipe, with a plurality of backflow gas guide holes formed in the mounting pipe in a line around a circumference thereof at positions adjacent to the end of the exhaust gas pipe; and   a secondary exhaust gas pipe surrounding the mounting pipe, wherein   a backflow passage is defined between the mounting pipe and the secondary exhaust gas pipe, so that a backflowing portion of exhaust gas, which is discharged from the mounting pipe, is drawn into the backflow passage and is guided into the mounting pipe through the backflow gas guide holes, and the guided backflow gas is discharged from the mounting pipe again.   
     
     
         12 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 11 , wherein an end of the mounting pipe and an end of the secondary exhaust gas pipe, each of which are opposite to ends thereof that are fastened to the exhaust gas pipe, are bent towards a longitudinal central axis, and a cross-sectional area of a space defined by the bent end of the secondary exhaust gas pipe is greater than a cross-sectional area of a space defined by the bent end of the mounting pipe. 
     
     
         13 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 11 , further comprising:
 an internal flue provided in an end of the mounting pipe which is opposite an end thereof that is fastened to the exhaust gas pipe, the internal flue having a honeycomb structure.   
     
     
         14 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 11 , further comprising:
 a gas guide blade unit provided in the mounting pipe to minimize collisions between the backflow gas, which is discharged through the backflow gas guide holes, and exhaust gas, and to increase a speed at which the exhaust gas is discharged.   
     
     
         15 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 14 , wherein the gas guide blade unit comprises:
 a plurality of blades provided on an inner surface of the mounting pipe, each of the plurality of blades being disposed between the adjacent backflow gas guide holes; and   a conical blade support body provided at a center of the mounting pipe at which the blades are coupled to each other.   
     
     
         16 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 15 , wherein each of the plurality of blades is curved so as to be inclined relative to a direction in which the exhaust gas is discharged. 
     
     
         17 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 14 , further comprising:
 a blade flue provided in an end of the mounting pipe which is opposite to an end thereof fastened to the exhaust gas pipe, the blade flue having a honeycomb structure.   
     
     
         18 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 14 , further comprising:
 a gas guide blade unit, an end thereof interposed between the mounting pipe and the exhaust gas pipe, the gas guide blade unit having a longitudinal cross-section curved towards a longitudinal central axis thereof such that a cross-sectional area of a space defined by the gas guide blade unit is reduced in a direction in which the exhaust gas is discharged, thus increasing a flow speed of the exhaust gas, the gas guide blade unit defining a second backflow passage, communicating with the backflow gas guide holes, between the gas guide blade unit and a circumferential inner surface of the mounting pipe.   
     
     
         19 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 18 , further comprising:
 a blade flue provided in a rear end of the gas guide blade unit with respect to the direction in which the exhaust gas is discharged, the blade flue having a honeycomb structure.   
     
     
         20 . The apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas according to  claim 11 , further comprising:
 a tertiary exhaust gas pipe provided around the secondary exhaust gas pipe, the tertiary exhaust gas pipe defining a locking hole, into which a locking bolt is inserted, in an end of the tertiary exhaust gas pipe adjacent to the end of the exhaust gas pipe, so that the secondary exhaust gas pipe is firmly fastened to the exhaust gas pipe by the tertiary exhaust gas pipe.