KR100743236B1 - Apparatus for preventing flowing backward of exhaust gas - Google Patents

Abstract

An apparatus for preventing backflow of exhaust gas is provided to smoothly discharge the exhaust gas, and to thereby increase combustion efficiency of an internal combustion engine and a boiler. An apparatus for preventing backflow of exhaust gas includes a fixing pipe(110), a dual exhaust pipe(120), and a triple exhaust pipe(130). The fixing pipe is fixed to an end of an exhaust pipe or an end of a smoke pipe of a boiler to form a flow passage(W1). The flow passage(W1) has a cross-section that narrows toward the end of the exhaust pipe to form a first venturi structure(V1). The dual exhaust pipe is installed at the fixing pipe surrounding the end of the fixing pipe to form a flow passage(W2). The flow passage(W2) has a cross-section that narrows toward the exhaust pipe to form a second venturi structure(V2). The triple exhaust pipe is installed to surround the dual exhaust pipe to form a flow passage(W3). The flow passage(W3) forms a third venturi structure through the dual exhaust pipe.

Description

Apparatus for preventing flowing backward of exhaust gas}

1 is a chassis diagram of a back pressure removing backflow prevention device according to a preferred embodiment of the present invention,

2 is a chassis diagram of a state in which a portion is removed by cutting along the line AA ′ of FIG. 1;

3 is a cross-sectional view taken along the line AA ′ of FIG. 1;

4 is a rear view of FIG. 1,

5 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow when the back pressure removing backflow prevention device according to the present invention is installed in an exhaust pipe of an internal combustion engine;

6 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow when the back pressure removing backflow prevention device according to the present invention is installed in a boiler communication;

6 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow when the back pressure removing backflow prevention device according to the present invention is installed in a boiler communication;

7 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow of another preferred embodiment of the present invention;

8 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow of another preferred embodiment of the present invention;

9 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow of another embodiment with the triple exhaust pipe removed;

10 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow of another embodiment with the triple exhaust pipe removed;

<Description of the code | symbol about the principal part of drawing>

(100): back pressure removing backflow prevention device (110): fixed tube

111: pressing portion 112: fastening hole

120: double exhaust pipe 121 flow port

(122): protrusion 130: triple exhaust pipe

(131): extension

The present invention relates to a back pressure removing backflow prevention device installed at an end of an internal combustion engine or at an end of a boiler communication. In particular, the present invention relates to an exhaust gas generated by combustion of fuel for operation of an internal combustion engine or a boiler. The present invention relates to a back pressure removing backflow prevention device for removing resistance and exhaust backflow to increase combustion efficiency of an internal combustion engine and a boiler.

In general, the exhaust gas, a pollutant burned in an internal combustion engine, is discharged at a pressure of about 3-5 kg / cm 2 and at a high temperature and a high pressure of about 600 ° C., and therefore, a catalytic device and a silencer are essential.

When the exhaust gas combusted by the internal combustion engine is discharged, a vacuum is formed in the exhaust manifold, and a primary exhaust resistance is formed to prevent exhaust gas emission, and the flow rate of the exhaust gas is significantly increased while passing through the honeycomb purifier of the three-way catalyst. The secondary exhaust resistance is reduced and is formed, and when it enters the silencer, it is discharged through a multi-stage partition and the third exhaust resistance is formed.

In the process of discharging the exhaust gas as described above, the silencer is usually designed with a volume of about 15-20 times the amount of exhaust gas, so that the exhaust resistance can not be generated. Increased fuel consumption and increased pollution are occurring.

Therefore, it is possible to expect the effects of improving fuel efficiency, improving fuel efficiency, power energy, and thermal energy only by smoothly exhausting the exhaust gas, and various proposals are known in this context.

In the case of a boiler, when the wind blows against the communication, the outside air flows back and the wind penetrates into the combustion chamber, causing incomplete combustion, and water vapor and nitrogen compound floats generated during combustion adsorb to the surface of the heat exchanger. Because of this fall and the problem of thermal energy degradation occurs a lot of research to improve this.

Korean Patent Laid-Open Publication No. 2000-56951 proposes a car exhaust box using a flow of air, which combines a streamlined exhaust port body with a tail pipe by using the air flow according to the driving of a car to pass through the streamlined body. The low pressure zone is formed according to the flow rate, and the exhaust gas is rapidly sucked up by the low pressure to help the exhaust.

However, it is difficult to commercialize such a streamlined exhaust port body due to its structurally large and complicated disadvantages.

According to the tail pipe of the main silencer having the vortex generating device of Korean Patent Laid-Open Publication No. 1998-75223, the vortex vane is provided to be rotated by the exhaust gas in the middle of the tail pipe. It is proposed, but this is rather difficult to provide a resistance to the flow of exhaust gas and the structural distortion caused by heat.

According to the exhaust gas exhaust device using the vortex of the patent registration No. 257874, a separate pipe is added to the front of the silencer formed in the exhaust gas path to introduce the outside air, and the vane is formed to form the inflow of outside air into the vortex. It is made by forming a damper for regulating the outside air inflow so as to synchronize with the opening of the throttle valve.

However, this forms a sub duct through which outside air flows to the front of the silencer for supplying the vortex to the exhaust gas path and removing the exhaust noise, so that the exhaust noise leaks into the sub duct, which generates a lot of noise and interlocks with the engine throttle valve. Since the damper for controlling the outside air is configured to cause damage to the complex structure and facilities.

In addition, the application No. 20-0010194 is to form a vortex by collecting the air flow according to the driving of the car to form a plurality of inlet holes to form a screw plate of the iron piece and plate in the outside air inlet and fixed in the exhaust port.

However, it forms a vortex with iron plate and screw plate in the expanded fallopian tube, and because of the narrow passage of exhaust, it is structurally unstable, induces exhaust resistance and backflow, and aerodynamic noise is induced at the end of the silencer.

Said inventions of the seamen have the advantage of improving the output and fuel efficiency by realizing the flow steam, but these proposals also have the disadvantage of generating aerodynamic noise at the end of the muffler at high speeds while stopping or driving at low speeds. .

The present invention is to solve the above problems by applying the triple venturi principle to remove the exhaust resistance and to achieve the structure of reducing the intake suction discharge and atmospheric resistance by the inflow of outside air, or the inflow of natural air in the stop state.

The present invention has been made in consideration of the above problems, and an object of the present invention is the exhaust resistance and exhaust backflow, which are inherently generated in discharging gas generated by combustion of fuel for internal combustion engine and boiler operation to the outside. The present invention provides a back pressure elimination backflow prevention device for improving the combustion efficiency of an internal combustion engine or a boiler by removing the resistance so that the exhaust gas is smoothly discharged.

Another object of the present invention is that the internal combustion engine having a high exhaust gas pressure and a boiler having a low exhaust gas pressure have a useful effect in that the external air is naturally sucked, and in the case of the internal combustion engine, a rapid external air flow that is proportional to the speed is exhausted. The exhaust backflow according to the gas discharge is more completely eliminated. In the case of the boiler, the exhaust gas flow is weak, so that the outside air naturally flows in, thus providing a back pressure elimination backflow prevention device that sucks and exhausts the exhaust backflow according to the exhaust flow. have.

Another object of the present invention is to provide a back pressure removing backflow prevention device having a structure that can be easily attached and detached without changing the structure of the exhaust pipe of the internal combustion engine or the boiler communication end.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional defects is fixed to the end of the exhaust pipe extending from the internal combustion engine or the end of the boiler communication to form a flow path for exhaust gas discharge, exhaust gas is discharged A fixed tube forming a first venturi structure in which an area of a flow path decreases toward an end portion;

Is installed in the fixed tube to have a structure surrounding the end of the fixed tube to form a passage for the exhaust backflow is suction, forming a second venturi structure that decreases the area of the passage toward the exhaust pipe direction, a plurality of protruding along the periphery Dual exhaust pipe formed with two flow ports; And

It is installed in the double exhaust pipe so as to surround the double exhaust pipe while maintaining a predetermined distance from the double exhaust pipe to form a passage through which external air flows to form a third venturi structure through the double exhaust pipe to inhale exhaust flow back. Triple exhaust pipes to assist in discharge; Characterized in that the back pressure removal backflow prevention device characterized in that it comprises a.

The back pressure removing backflow prevention device of the present invention having the above characteristics is installed at the end of the exhaust pipe or the end of the boiler communication line extending from the internal combustion engine to reduce exhaust resistance and atmospheric resistance and to block the backflow of the exhaust gas, thereby preventing the internal combustion engine or the boiler. Improved combustion efficiency to prevent fuel consumption and harmful substances caused by incomplete combustion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a perspective view of a back pressure removing backflow prevention device according to a preferred embodiment of the present invention, Figure 2 is a perspective view of a state in which a portion is removed by cutting along the line AA 'of Figure 1, 3 illustrates a cross-sectional view taken along line AA ′ of FIG. 1, and FIG. 4 illustrates a rear view of FIG. 1. 1 to 4, the back pressure removing backflow prevention device 100 according to a preferred embodiment of the present invention is composed of a fixed pipe 110, a double exhaust pipe 120 and a triple exhaust pipe 130. At this time, the fixed pipe 110, the double exhaust pipe 120 and the triple exhaust pipe 130 are formed to have a different diameter so that the double exhaust pipe 120 is installed on the outside of the fixed pipe 110, the double exhaust pipe 120 Triple exhaust pipe 130 is installed on the outside of the exhaust gas is configured to suck and discharge while exhaust gas induces a quick and smooth discharge, each component will be described in detail as follows.

The fixed pipe 110 is installed in the exhaust pipe 10 or the boiler communication extending from the internal combustion engine, is installed to form a flow path (W1) in which the exhaust gas is discharged in series with the exhaust pipe 10 or communication, exhaust gas The first venturi structure (V1) is formed to decrease the area of the flow path toward the end portion is discharged. The fixed pipe 110 formed as described above enables the rapid and smooth discharge of the exhaust gas by decreasing the exhaust resistance and the atmospheric resistance by increasing the flow rate of the exhaust gas toward the end portion where the area of the flow path W1 decreases.

On the other hand, the fixed pipe 110 is formed to have a larger diameter than the exhaust pipe 10 or communication so that the installation can be made by simply fitting without changing the structure of the exhaust pipe 10 or communication, the exhaust pipe 10 or communication A plurality of pressing parts 111 are provided therein so as to be combined with the interference fit. The pressing unit 111 is formed to have a predetermined interval along the inner circumferential surface of the fixed tube 110, and fixed tube 110 and the exhaust pipe 10 or the fixed tube 110 when the contact with the exhaust pipe or communication when the fixed tube 110 by being in close contact To provide a firm bond. In addition, a fastening hole 132 into which a fixing bolt B is inserted for a more robust coupling of the fixed pipe 110 is formed at a predetermined position of the triple exhaust pipe 130, and is fixed through the fastening hole 132. The bolt B is fastened to the exhaust pipe 10 or the communication to prevent the separation of the fixing pipe 110.

The dual exhaust pipe 120 is formed to form a passage (W2) through which the exhaust gas flows back, is installed in the fixed pipe 110 to have a structure surrounding the end of the fixed pipe 110, exhaust gas flowing back ( It is configured to form a second venturi structure (V2) in which the area of the passage (W2) is reduced toward the exhaust pipe 10 in order to more smoothly enter the "exhaust backflow"). In addition, the periphery of the double exhaust pipe 120 is provided with a plurality of protruding flow port 121 for discharging the suction exhaust backflow to the passage (W3) formed by the triple exhaust pipe 130, the exhaust backflow is fixed pipe It is formed to protrude further from the discharge side end of the fixed tube 110 to be introduced into the passage (W2) formed by the double exhaust pipe 120 without being introduced into (110).

Meanwhile, the flow port 121 may be formed at regular intervals at a central portion of the protrusion 122 protruding convexly along the periphery of the double exhaust pipe 120, by the protrusion 122 and the triple exhaust pipe 130. The third venturi structure V3 is formed to improve the suction force of the exhaust backflow. Such a flow port 121 is preferably composed of a plurality of flow holes 121 formed on the protrusion 122 with a constant interval from each other.

The triple exhaust pipe 130 forms a passage W3 through which external air flows, and maintains a predetermined distance with the dual exhaust pipe 120 at the outside of the dual exhaust pipe 120 to maintain the dual exhaust pipe 120. ) Is installed to surround. As described above, the triple exhaust pipe 130 forms the protrusion 122 and the third venturi structure V3, and the external air flowing through the passage W3 formed by the triple exhaust pipe 130. The flow rate is increased by the third venturi structure (V3), and by increasing the flow rate to lower the pressure of the flow port 121 to help the inflow of the exhaust backflow.

Meanwhile, the triple exhaust pipe 130 is provided with an expansion part 131 extending outward at one or both ends thereof so that the outside air can be more smoothly introduced. In the present exemplary embodiment, the expansion part 131 is provided at the left end of the triple exhaust pipe 130, but as described above, the expansion part 131 may be formed at both ends or the right end. have.

The back pressure removal backflow prevention device 100 configured as described above may be installed and used at the end of the exhaust pipe of the internal combustion engine or at the end of the boiler communication, and provides the following functions.

5 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow when the back pressure removing backflow prevention device according to the present invention is installed in the exhaust pipe of the internal combustion engine. Referring to FIG. 5, the exhaust gas G1 generated due to the combustion of the fuel for the operation of the internal combustion engine is discharged through the exhaust pipe and the fixed pipe 110, and the first venturi structure V1 formed by the fixed pipe 110. Since the flow rate increases as the exhaust gas G1 passes through the region, the exhaust gas can be quickly and smoothly discharged.

Meanwhile, when the exhaust gas is discharged through the fixing pipe 110 as described above, the reverse flow of the exhaust gas occurs, and the exhaust backflow G2 generated as described above is formed by the second venturi structure V2 formed by the double exhaust pipe 120. The third venturi structure V3 formed by the protrusion 122 and the triple exhaust pipe 130 flows into the passage W2 of the dual exhaust pipe 120, and the triple exhaust pipe 130 is disposed through the flow opening 121. Is discharged. In more detail, the triple exhaust pipe 130 is formed, and the rapid external air G3 flows to the third venturi structure V3 formed by the protrusion 122 and the triple exhaust pipe 130. Accelerated by the flow of the passage (W3) at a high speed, a low pressure or a vacuum pressure is generated around the flow port 121 by the rapid flow of the external air (G3). As such, the exhaust backflow G2 flows into the passage W2 of the dual exhaust pipe 120 by the vacuum pressure generated in the flow port 121, and the exhaust backflow G2 flowing through the dual exhaust pipe 120 is 2. Accelerated by the second venturi structure (V2) formed by the heavy exhaust pipe 120 is discharged to the outside with the outside air (G3) through the flow port 121.

FIG. 6 is a cross-sectional view showing the flow of exhaust gas and exhaust backflow when the back pressure removing backflow prevention device according to the present invention is installed in the communication tube 20 of the boiler. Referring to FIG. 6, even in the case of the boiler, the same flow of the exhaust gas G1, the exhaust backflow G2, and the outside air G3 is formed as in the above-described internal combustion engine, thereby enabling the smooth discharge of the exhaust gas. To shut off the exhaust backflow.

As described above, in the present invention, the first venturi structure V1 is fixed by the fixing pipe 110, the second venturi structure V2 is formed by the double exhaust pipe 120, the protrusion 122, the third venturi structure V3, and the triplet. By the exhaust pipe 130, the exhaust gas is effectively discharged and the exhaust backflow can be blocked to increase the combustion efficiency of the internal combustion engine or the boiler.

FIG. 7 shows another structure of the double exhaust pipe 120a according to another embodiment of the third venturi structure. As described above, the double exhaust pipe forms a passage (W2) through which the exhaust gas flows back, and the structure installed in the fixed pipe so as to have a structure surrounding the end of the fixed pipe is the same as the structure described above. The flow port 121a is made of a round cap to protrude toward the position of the triple exhaust pipe after cutting a portion along the periphery of the dual exhaust pipe. At this time, the passage formed by the round cap and the triple exhaust pipe 130a is narrower than the portion without the round cap, and thus has a venturi structure, so that the exhaust gas introduced through the flow port is quickly discharged to the outside.

8 shows another embodiment of the third venturi structure, in which a plurality of flow holes 121b are installed in the double exhaust pipe 120b, and a peripheral portion of the triple exhaust pipe 130b is installed at the position where the flow holes 121b are installed. The round shape 135 is made to have a small diameter. Therefore, the flow port installed position is narrower than other portions by the round shape 135 of the triple exhaust pipe 130b has a venturi structure so that the exhaust gas introduced through the flow port 121b is quickly discharged to the outside.

9 and 10 illustrate a form in which the triple exhaust pipe is removed from the back pressure removing backflow prevention device of FIGS. 3 and 7, and the third venturi structure V3 is not provided by removing the triple exhaust pipe, but the second venturi structure is provided in the second venturi structure. As the pressure outside the flow holes 121c and 121d is lower than the inside of the flow ports 121c, the exhaust gas is naturally discharged to the outside, thereby sufficiently serving as a back pressure removing backflow preventing device. At this time, the back pressure removal efficiency may vary depending on the presence or absence of the triple exhaust pipe, but it is apparent that the manufacturer can selectively determine the existence of the triple exhaust pipe according to the manufacturing cost, the type of the exhaust pipe, and the use environment.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

The present invention removes the exhaust resistance and exhaust backflow of the exhaust gas and reduces the atmospheric resistance as described above, thereby improving fuel efficiency and reducing smoke due to improved combustion efficiency of internal combustion engines and boilers, realizing excellent operating performance and power energy and thermal energy. It can be maximized.

In addition, it can be easily installed on the end of the exhaust pipe of the internal combustion engine or the end of the boiler communication without structural change, thereby improving compatibility with various devices.

Claims (10)

The first venturi structure (V1) is fixed to the end of the exhaust pipe extending from the internal combustion engine or the communication end of the boiler to form a flow path (W1) through which exhaust gas is discharged, and the area of the flow path (W1) decreases toward the end of the exhaust gas discharge. Fixing tube 110 to form a; The second installation is installed in the fixed tube 110 to have a structure surrounding the end of the fixed tube 110 to form a passage (W2) for the exhaust backflow is sucked, the area of the passage (W2) decreases toward the exhaust pipe direction A double exhaust pipe 120 forming a venturi structure V2 and having a plurality of flow holes 121 formed along a periphery thereof; And Triple exhaust pipes are formed to surround the double exhaust pipe 120 to form a third venturi structure through the double exhaust pipe 120 by forming a passage W3 through which external air flows ( 130); back pressure removing backflow prevention device comprising a. The method of claim 1, Each of the flow ports 121 is formed at the center of the protrusion 122 formed to protrude convexly toward the triple exhaust pipe 130, and the third venturi by the protrusion 122 and the triple exhaust pipe 130. Back pressure removing backflow prevention device, characterized in that configured to form a structure (V3). The method of claim 1, The double exhaust pipe (120) is back pressure removing backflow prevention device, characterized in that formed so as to protrude further from the discharge side end of the fixed tube (110). The method of claim 1, The fixing pipe 110 is formed with a larger diameter than the exhaust pipe and provided with a plurality of pressing portions 111 protruding convexly inwardly of the fixing pipe 110 so that interference between the exhaust pipe and the fixing pipe 110 is achieved. Fixing bolt (B) is a back pressure removing backflow prevention device, characterized in that fastened to the fixed and the communication of the end of the exhaust pipe extending from the triple exhaust pipe 130 and the internal combustion engine or the boiler. The method of claim 1, At one end or both ends of the triple exhaust pipe 130, the back pressure removing backflow prevention device, characterized in that the expansion portion 131 is formed extending in the outward direction. Fixed tube 110 of the structure that is fixed to the end of the exhaust pipe extending from the internal combustion engine or the communication end of the boiler to form a flow path (W1) for exhaust gas discharge, the area of the flow path (W1) is reduced toward the end of the exhaust gas is discharged ; And a double exhaust pipe installed in the fixed pipe 110 to have a structure surrounding the end of the fixed pipe 110 to form a passage (W2) through which the exhaust backflow is suctioned, and having a plurality of flow ports formed along the periphery thereof. Back pressure removal backflow prevention device. The method of claim 6 The dual exhaust pipe has a back pressure removing backflow prevention device, characterized in that it has a round cap to protrude outward at the position where the flow port is formed. The method of claim 6 A triple exhaust pipe is installed to surround the double exhaust pipe while maintaining a predetermined distance from the dual exhaust pipe, and rounds the peripheral portion of the triple exhaust pipe corresponding to the position where the flow port of the dual exhaust pipe is installed to have a smaller diameter. Back pressure removal backflow prevention device, characterized in that made in the shape (135). The method of claim 6 Back pressure removing backflow prevention device, characterized in that the dual exhaust pipe is provided with a flow port is formed to protrude outward. The first venturi structure (V1) is fixed to the end of the exhaust pipe extending from the internal combustion engine or the communication end of the boiler to form a flow path (W1) through which exhaust gas is discharged, and the area of the flow path (W1) decreases toward the end of the exhaust gas discharge. Fixing tube 110 to form a; It is installed in the fixed tube 110 to have a structure surrounding the end of the fixed tube 110 is formed in the passage (G2) for the exhaust backflow suction is formed and a second venturi structure along the periphery to form a plurality of protruding flow holes (121c) Dual exhaust pipe (120a) is formed; And Back pressure removing backflow prevention device, characterized in that to form a third venturi structure through the double exhaust pipe (120c) to help the suction discharge of the exhaust backflow.

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