CN101688461B - Apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas - Google Patents
Apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas Download PDFInfo
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- CN101688461B CN101688461B CN200780053363.XA CN200780053363A CN101688461B CN 101688461 B CN101688461 B CN 101688461B CN 200780053363 A CN200780053363 A CN 200780053363A CN 101688461 B CN101688461 B CN 101688461B
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- fixed tube
- outlet pipe
- exhaust
- gas
- exhaust gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
- F01N13/1844—Mechanical joints
- F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Characterised By The Charging Evacuation (AREA)
- Exhaust-Gas Circulating Devices (AREA)
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 backf lowing 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.
Description
Technical field
Present invention relates in general to a kind of elimination exhaust pressure (exhaust gas pressure) and prevent the device of exhaust gas recirculation (exhaust pulses), especially so a kind of device of eliminating exhaust pressure and preventing exhaust gas recirculation, comprise: fixed tube (mounting pipe), be installed on from internal-combustion engine extended outlet pipe rear end or the boiler flue rear end, and have along forming a plurality of reflux gas guide holes (backflow gas guide hole) in a line of outer surface; And second exhaust pipe, be centered around fixed tube and arrange on every side, discharge thereby limit the return flow line that direction is opened formation from above-mentioned reflux gas guide hole to waste gas between fixed tube and second exhaust pipe.
Therefore, the reflux gas (exhaust pulses) that refluxes in the waste gas that can discharge by fixed tube is directed to the return flow line that is formed between second exhaust pipe and fixed tube, and the reflux gas that is guided moves to fixed tube inside by the reflux gas guide hole, be expelled to the outside together with the waste gas of discharging subsequently, thereby prevent that reflux gas is back in outlet pipe.
As mentioned above, in the situation that prevent that reflux gas is back to outlet pipe, can improve engine performance, improve thus the mileage oil consumption and reduce smoke evacuation, thereby improving to greatest extent heat energy efficiency, and, can easily install by being fixed in by force the outlet pipe end, for the user offers convenience.
Background technique
Generally speaking, for internal-combustion engine, the waste gas of the pollutant that produces owing to burning in internal-combustion engine is with about 3～5kg/cm
2Relatively high pressure and the relatively-high temperature state of about 600 ℃ discharge, therefore catalysis device and baffler must be installed.
In internal-combustion engine, when waste gas is discharged, because forming vacuum in gas exhaust manifold, hinder thereby form the first row atmidometer that waste gas is discharged from internal-combustion engine.Subsequently, when this waste gas during by purifier its flow velocity obviously reduce, thereby form the second row atmidometer.
After this, when the waste gas that flows into baffler passes the dividing plate that forms stage by stage, will form the 3rd exhaust resistance.
So in the waste gas discharge process, baffler is usually designed to the volume of 15～20 times that has greater than engine displacement, therefore inevitably produces exhaust resistance.Thus, the output of motor descends, and increases approximately by 5～10% fuel consumption and increase the amount of pollutant.
Therefore, it should be understood that and only to improve combustion efficiency by smooth combustion gas, improve mileage oil consumption, output energy and heat energy with this.For achieving the above object, various routine techniques schemes were once proposed.
In the situation that boiler if flue runs into against the wind, is penetrated into inside, firing chamber because the outside air adverse current makes wind, cause partial combustion, and the steam that produces between main combustion period and the nitrogen-containing compound that swims will be adsorbed on the surface of heat exchanger.
In the situation that above-mentioned phenomenon repeats, will reduce the performance of boiler heat exchanger, cause hot-swap feature to descend.Therefore also carried out much being intended to improve the research of the problems referred to above.
Simultaneously, as an illustrative examples of routine techniques scheme, the exhaust apparatus of vehicle of Air Flow is proposed to utilize for No. 2000-56951 at the Korean Patent communique.This technological scheme is utilized Air Flow, it is designed to the streamline main body of venting gas appliance is incorporated into outlet pipe, thereby when Vehicle Driving Cycle, form the area of low pressure according to the air velocity of the streamline body surfaces of flowing through around venting gas appliance, thereby make waste gas be sucked away by the impact of above-mentioned low pressure, thereby help the discharge of waste gas.
But the shortcoming of technique scheme is, the structure of streamline main body is relatively large and complicated, therefore is difficult for it is arranged on vehicle, is difficult to utilize in practice this technological scheme.
Simultaneously, another example as the routine techniques scheme, proposed to have vortex generator in No. the 1998-75223rd, the Korean Patent communique main muffler outlet pipe of (vortex generator), the eddy current generation blade that setting can rotate by waste gas in the middle of outlet pipe.This technological scheme is configured to utilize waste gas to make blade rotary, thereby produces eddy current, promotes thus the discharge of waste gas.Yet the problem of existence is, blade becomes the root that produces some resistances that hinder exhaust-gas flow, and the very easily temperature distortion of its structure, therefore is difficult to utilize in practice it.
As another example of routine techniques scheme, the exhaust extractor of eddy current has been proposed to utilize in No. the 257874th, Korean Patent communique, at the baffler front end that is arranged on the waste gas discharge path, setting can suck the pipeline of outside air separately.In addition, the blade (vane) that outside air can be sucked and produces eddy current is installed in above-mentioned pipeline.In addition, this device also has the air-lock (damper) for the outside air amount that regulate to suck, and the openness of itself and throttle valve is worked pro rata.
But, in this technological scheme, because getting rid of the baffler front end that the path provides eddy current and eliminates exhaust noise to waste gas, the looped pipeline with the extraneous gas circulation is set, so exhaust noise reaches the outside by this looped pipeline, therefore produce very large noise.And, regulate air-lock because being equipped with the outside air of the throttle valve of motor interlock, a defective that therefore exists is, it is complicated that the structure of equipment and structure become.
Another example as the routine techniques scheme, Korean Utility Model Application proposes to be used for the exhaust extractor of vehicle for No. 20-0010194, form the air stream hand-hole in device, and form flat die roll and steel plate on every side at the air stream hand-hole, during with convenient Vehicle Driving Cycle, utilize the air-flow that produces to form eddy current.
But said apparatus is formed in flared tube and forms eddy current by steel plate and flat die roll, so waste gas must pass through relatively narrow path.Therefore, the problem of this device is, structural instability produces exhaust resistance and reflux gas, and produces aerodynamic noise around the baffler rear end.
Technique scheme is recognized the flow velocity that increases waste gas, improves thus the output of motor and reduces fuel consume.But their defective is, when vehicle stop or low speed driving, it has little effect, and when high vehicle speeds, produces aerodynamic noise in the baffler rear end.
Summary of the invention
Therefore, the present invention is devoted to overcome the deficiency of prior art, and one object of the present invention is to provide a kind of device of eliminating exhaust pressure and preventing exhaust gas recirculation, comprise: fixed tube, be installed on from the outlet pipe rear end of internal-combustion engine extended spot or the boiler flue rear end, and have along a plurality of reflux gas guide holes of pre-position in a line of its side face; And second exhaust pipe, be centered around fixed tube and arrange on every side, discharge thereby limit the return flow line that direction is opened formation from above-mentioned reflux gas guide hole to waste gas between fixed tube and second exhaust pipe.
Therefore, the reflux gas (exhaust pulses) that refluxes in the waste gas that can discharge by fixed tube is directed to the return flow line that is formed between second exhaust pipe and fixed tube, and the reflux gas that is guided moves to fixed tube inside by the reflux gas guide hole, be expelled to the outside together with the waste gas of discharging subsequently, thereby prevent that reflux gas is back in outlet pipe.
As mentioned above, in the situation that prevent that reflux gas is back to outlet pipe, can improve engine performance, improve thus the mileage oil consumption and reduce smoke evacuation, thereby improving to greatest extent heat energy efficiency, and, can easily install by being fixed in by force the outlet pipe rear end, for the user offers convenience.
To achieve these goals, the invention provides a kind of device of eliminating exhaust pressure and preventing exhaust gas recirculation, comprise: fixed tube, have and to be installed on from outlet pipe end that internal-combustion engine extends or the structure of boiler flue end, and that the part that is not fixed to the outlet pipe end of fixed tube exceeds the outlet pipe rear end is outwards outstanding, fixed tube is hollow, thereby it is inner is communicated with outlet pipe, and the edge forms a plurality of reflux gas guide holes around a line of its circumference in fixed tube in the position adjacent with above-mentioned outlet pipe end; And second exhaust pipe, be set to have the shape around fixed tube, wherein, form the return flow line between above-mentioned fixed tube and above-mentioned second exhaust pipe, part flows in the return flow line so that reflux in the waste gas of discharging by fixed tube, and pass through the reflux gas guide hole to fixed tube guided inside reflux gas, and above-mentioned reflux gas of guiding is expelled to the outside again.
Preferably, fixed tube and second exhaust pipe not with fixing each end of outlet pipe, crooked towards longitudinal center's direction, and the section area in the space that curved end defines of second exhaust pipe, greater than the section area in the space that curved end defines of above-mentioned fixed tube.
This device can also be included in the inside flue that does not arrange with outlet pipe fixing end of above-mentioned fixed tube, and this inside flue has honeycomb (honeycomb) structure.
In addition, this device also comprises gas guide blade unit (gas guide blade unit), is arranged at above-mentioned fixed tube inboard, in order to reduce from the reflux gas of reflux gas guide hole and conflicting of waste gas, and improve the waste gas velocity of discharge, thereby combustion gas successfully rapidly.
In addition, above-mentioned gas guide blade unit comprises: a plurality of blades, be arranged on the internal surface of fixed tube, and each vane collocation in a plurality of blades is between adjacent reflow gas guide hole; And conical blade supportive body, be positioned at the central part that above-mentioned a plurality of blade engages the fixed tube at place.
In addition, each bending blade in above-mentioned a plurality of blades tilts at a predetermined angle in order to discharge direction with respect to waste gas.
This device can also be included in the blade flue that does not arrange with outlet pipe fixing end of above-mentioned fixed tube, and this blade flue has cellular structure.
In addition, this device also can comprise gas guide blade unit, the one end is inserted between above-mentioned fixed tube and outlet pipe, gas guide blade unit has the longitudinal cross-section towards its longitudinal center's axis bending, thereby discharging direction by the section area in gas guide blade space that the unit defines along waste gas reduces, thereby improve exhaust-gas flow speed, the second return flow line that formation is communicated with the reflux gas guide hole between gas guide blade unit and tachy steroling fixed tube inner peripheral surface surface, gas guide blade unit.
In addition, this device can be included in the inner blade flue that arranges in waste gas discharge direction rear end of above-mentioned gas guide blade unit, and this blade flue has cellular structure.
In addition, this device also can comprise the 3rd outlet pipe, arranges around the above-mentioned second exhaust pipe, forms locking aperture in the 3rd outlet pipe one end adjacent with above-mentioned outlet pipe end, with the insertion lock(ing) bolt, thereby by the 3rd outlet pipe, second exhaust pipe is fixed in outlet pipe more firmly.
Description of drawings
Fig. 1 shows according to elimination exhaust pressure of the present invention and prevents the view of the device of exhaust gas recirculation;
Fig. 2 is the part sectioned view along A-A ' line of Fig. 1;
Fig. 3 is according to the sectional side view that prevents exhaust gas recirculation device of the present invention;
Fig. 4 shows the view that prevents the exhaust-gas flow of exhaust gas recirculation device according to of the present invention;
Fig. 5 shows the view that prevents another embodiment of exhaust gas recirculation device according to of the present invention;
Fig. 6 is the view that prevents exhaust gas recirculation device that shows according to embodiment of the present invention modification, and it is provided with inner flue;
Fig. 7 shows the view that prevents according to another embodiment of the present invention exhaust gas recirculation device, and it is provided with stator blade;
Fig. 8 is the view that shows according to another embodiment of the stator blade that prevents exhaust gas recirculation device of the present invention;
Fig. 9 is the view that shows the modification of Fig. 7, wherein also is provided with the blade flue;
Figure 10 is the view that shows according to the another embodiment of the stator blade that prevents exhaust gas recirculation device of the present invention;
Figure 11 is the view that shows the modification of Figure 10, wherein also is provided with the blade flue; And
Figure 12 is the view that prevents exhaust gas recirculation device that shows according to another embodiment of the present invention, and it is provided with the 3rd outlet pipe.
Embodiment
Below, be described with reference to the accompanying drawings the preferred embodiment of the present invention.
Although for exemplary purpose, the preferred embodiments of the present invention are disclosed, but these embodiments limit the scope of the invention, and those skilled in the art are understood that, under the condition that does not break away from the technology of the present invention scope and spirit, various modification, increase and replacement are all possible.
Fig. 1 shows according to elimination exhaust pressure of the present invention and prevents the view of the device of exhaust gas recirculation.Fig. 2 is the part sectioned view along A-A ' line of Fig. 1.Fig. 3 is according to the sectional side view that prevents exhaust gas recirculation device of the present invention.Fig. 4 shows the view that prevents the exhaust-gas flow of exhaust gas recirculation device according to of the present invention.Fig. 5 shows the view that prevents another embodiment of exhaust gas recirculation device according to of the present invention.Fig. 6 is the view that prevents exhaust gas recirculation device that shows according to embodiment of the present invention modification, and it is provided with and comprises inner flue.Fig. 7 shows the view that prevents according to another embodiment of the present invention exhaust gas recirculation device, and it is provided with stator blade.Fig. 8 is the view that shows according to another embodiment of the stator blade that prevents exhaust gas recirculation device of the present invention.Fig. 9 is the view that shows the modification of Fig. 7, wherein also is provided with the blade flue.Figure 10 is the view that shows according to the another embodiment of the stator blade that prevents exhaust gas recirculation device of the present invention.Figure 11 is the view that shows the modification of Figure 10, wherein also is provided with the blade flue.Figure 12 is the view that prevents exhaust gas recirculation device that shows according to another embodiment of the present invention, and it is provided with the 3rd outlet pipe.
As shown in the figure, according to elimination exhaust pressure of the present invention and prevent the device 10 of exhaust gas recirculation, comprise fixed tube 100 and second exhaust pipe 110, be concentric circles and have different-diameter.
Fixed tube 100 is incorporated on boiler or extended outlet pipe 1 back end outer surface of internal-combustion engine.And, forming a plurality of reflux gas guide holes 102 with outlet pipe 1 rear end adjacent position around the outer circumferential face of fixed tube 100.
At fixed tube 100 outside covers, second exhaust pipe 110 is arranged, it forms the shape around fixed tube 100.Therefore, second exhaust pipe 110 forms the return flow line 120 that an end is opened around fixed tube 100 and between second exhaust pipe 110 and fixed tube 100.
In other words, fixed tube 100 and second exhaust pipe 110 are connected with each other at their front end, and form return flow line 120 between them, and this return flow line is extended and opens towards their rear end from the intermediate portion of fixed tube 100 and second exhaust pipe 110.In other words, form return flow line 120 between fixed tube 100 and second exhaust pipe 110, open so that it discharges direction from reflux gas guide hole 102 to waste gas.
Usually, in the situation that boiler or internal-combustion engine, due to their structural characteristics, backflow phenomenon occuring, wherein produces gas backstreaming and make the part exhaust gas recirculation to outlet pipe 1 in outlet pipe 1 rear end.Yet in the present invention, due to said structure, reflux gas enters return flow line 120, rather than enters outlet pipe 1.
In other words, when the waste gas of discharging from outlet pipe 1 passes the fixed tube 100 that is communicated with outlet pipe 1, be subjected to the reflux gas that back pressure affects to suck return flow line 120 with making, prevent that the reflux gas backflow from flowing into fixed tube 100.
In addition, be inhaled into the reflux gas of return flow line 120, move in fixed tube 100 by the reflux gas guide hole 102 that is formed in fixed tube 100, these reflux gas are expelled to outside fixed tube 100 together with the waste gas of discharging subsequently.
At this moment, fixed tube 100 has such funnel shaped: the rear end of its longitudinal cross-section from the front end of the fixed tube 100 of being combined with outlet pipe 1 rear end to this fixed tube 100, tilt towards longitudinal center's axis direction, therefore can improve the waste gas velocity of discharge.And, due to this shape of fixed tube 100, by changing the distance that staggers of fixed tube 100 and second exhaust pipe 110, make the section area at 120 two ends, return flow line different.
As mentioned above, section area due to return flow line 120, increase to its rear end with front end that reflux gas guide hole 102 is communicated with from it, improve the reflux gas speed of the end that flows into return flow line 120, thereby promote the guiding reflux gas to flow into the return flow line, and make it easily suck fixed tube by reflux gas guide hole 102.
As shown in Figure 5, fixed tube 100 and second exhaust pipe 110 are configured and make its loose end (rear end) crooked to central axial direction.In this case, around the crooked end of fixed tube 100 and second exhaust pipe 110, further improve the velocity of discharge of waste gas, make the discharge of waste gas become easy.
In other words, and the end that waste gas discharged opposite with outlet pipe 1 rear end of fixed tube 100 and second exhaust pipe 110 curves inwardly, so that the exhaust velocity of fixed tube 100 front ends that is anchored on outlet pipe 1 becomes easy greater than the exhaust velocity of its rear end thereby waste gas is discharged.
In addition, in the situation that the rear end of fixed tube 100 to its longitudinal center's axis direction bending, can prevent more effectively that reflux gas from passing through the rear end backflow of fixed tube 100.
At this moment, therefore the space section area that is defined by the rear end of second exhaust pipe 110 forms return flow line 120 entrances greater than the space section area that is defined by the rear end of fixed tube 100.And return flow line 120 is used from the second exhaust pipe 110 1 with curved end the amount that reduces reflux gas.
In addition, be provided with inner flue 130 in the rear end of fixed tube 100.Inner flue 130 has honeycomb (honeycomb) structure, thereby prevents the exhaust gas diffusion of not expecting that fixed tube 100 back edges occur, so as can rapider successfully combustion gas to outside.
, by gas guide blade unit 140 is set in fixed tube 100, make by outlet pipe 1 combustion gas and become more smooth and easy to shown in Figure 9 as Fig. 7.In addition, by the smooth discharge of waste gas, effectively discharge the reflux gas that flows into by reflux gas guide hole 102.
Gas guide blade unit 140 comprises blade supportive body and a plurality of blade.Blade is arranged at the inboard of fixed tube 100, and each vane collocation is between contiguous reflux gas guide hole 102.The blade supportive body is cone shape and is arranged at the central part of the contacted fixed tube of a plurality of blades.
In an embodiment of the present invention, although the blade supportive body is shown as cone shape, the blade supportive body also can adopt other shapes, as long as guarantee to pass fixed tube 100 combustion gas rapidly and successfully.
In addition, as shown in Figure 8, gas guide blade unit 140 ' another embodiment as gas guide blade unit, it has such structure: make each blade be as the criterion to a certain degree and be bent to form with rapid combustion gas with relative discharge direction.In this case, combustion gas more rapidly, thus can more effectively discharge reflux gas by reflux gas guide hole 102.
In addition, can be provided with in the loose end of fixed tube 100 (rear end) the blade flue 150 of cellular structure, thus can easier combustion gas.Thereby by smooth combustion gas, can effectively discharge the reflux gas that flows into fixed tube 100 by reflux gas guide hole 102.
In addition,, gas guide blade unit 140 is set in fixed tube 100 " and is inserted between outlet pipe 1 and fixed tube 100 to shown in Figure 11 as Figure 10.
" have such shape, its longitudinal cross-section is crooked towards its longitudinal center's axis direction, thereby more past its space section area that defines of waste gas discharge direction becomes less to its rear end from its front end in gas guide blade unit 140.Thereby in fixed tube 100 and gas guide blade unit 140 " between form the second return flow line 160 ".
Similarly, in the situation that gas guide blade unit 140 " the rear end tilt to its longitudinal center's axis direction, make the waste gas discharge become easy because the velocity of discharge of the waste gas by outlet pipe 1 increases.
The second return flow line 160 " effect be the reflux gas that prevents from flowing into return flow line 120, be back to outlet pipe 1 inside after by reflux gas guide hole 102, thereby make the reflux gas can be more reliably and effectively be expelled to the outside.
In addition, preferably, in gas guide blade unit 140 " rear end be provided with the blade flue 150 of cellular structure ", thus combustion gas more effectively, and by smooth combustion gas, can effectively discharge the reflux gas that flows into by reflux gas guide hole 102.
In addition, the present invention can have such structure: be provided with the 3rd outlet pipe 170 around second exhaust pipe 110.In this case, the two end part of the 3rd outlet pipe 170 are arranged at the outside, two end part of second exhaust pipe 110, thereby the 3rd outlet pipe 170 covers second exhaust pipe 110 fully.
In addition, at an end of three outlet pipe 170 adjacent with outlet pipe 1, form locking aperture, to insert lock(ing) bolt B.Lock(ing) bolt B rotatably inserts in locking aperture 172, thereby exerts pressure to the outer surface part of outlet pipe 1.
Like this, the 3rd outlet pipe 170 and second exhaust pipe 110 fix, and lock(ing) bolt B exerts pressure round about in the outer surface part of outlet pipe 1.Thereby, the 3rd outlet pipe 170 is firmly secured to outlet pipe 1.
In addition; in this embodiment, because of the 3rd outlet pipe 170 with the shape setting around fixed tube 100 and second exhaust pipe 110, thereby by the 3rd outlet pipe 170 protection fixed tube 100 and second exhaust pipes 110; and the beautiful shape of holding device satisfies consumer demand.
Industrial applicibility
As mentioned above, the invention provides the device of eliminating exhaust pressure and preventing exhaust gas recirculation, this device is configured to the backflow in waste gas partly to be directed to and is formed in the return flow line of defining between second exhaust pipe and fixed tube, and the reflux gas that is guided is inner by reflux gas guide hole suction fixed tube, and be expelled to the outside together with the waste gas of discharging subsequently, thereby prevent that reflux gas is back in outlet pipe.
In the situation that eliminate exhaust pressure by preventing that reflux gas from flowing into, can improve engine performance, improve thus the mileage oil consumption and reduce smoke evacuation, thereby improving to greatest extent heat energy efficiency.And only by being fixed in by force on outlet pipe, device of the present invention can easily be installed, for the user offers convenience.So, described the present invention is effective and practical.
Claims (5)
1. device of eliminating exhaust pressure and preventing exhaust gas recirculation comprises:
Fixed tube, have and be installed on from outlet pipe end that internal-combustion engine extends or the structure of the flue end of boiler, the end is outwards outstanding thereby the part except the part that is fixed to the outlet pipe end of described fixed tube exceeds outlet pipe, described fixed tube is hollow, thereby it is inner is communicated with outlet pipe, and the edge is formed with a plurality of reflux gas guide holes around a line of its circumference in the position that is close to described outlet pipe end is in fixed tube; And
Second exhaust pipe is set to have the shape around fixed tube, wherein,
Be limited with the return flow line between described fixed tube and described second exhaust pipe, so that the backflow from the waste gas that fixed tube is discharged partly flows in described return flow line, and be directed in fixed tube by the reflux gas guide hole, and the reflux gas that is guided is expelled to the outside again
Wherein, not described fixed tube and second exhaust pipe not crooked towards longitudinal center's axis direction with outlet pipe fixing each end, and the section area in the space that the section area in the space that the curved end of second exhaust pipe defines defines greater than the curved end of described fixed tube
Described device also comprises:
Fixed tube be not provided with inner flue with outlet pipe fixing end, described inner flue has cellular structure.
2. elimination exhaust pressure according to claim 1 and prevent the device of exhaust gas recirculation also comprises:
Gas guide blade unit is arranged in described fixed tube, in order to reduce conflicting between the reflux gas of discharging from the reflux gas guide hole and waste gas, and improves the velocity of discharge of waste gas, thus combustion gas successfully rapidly.
3. elimination exhaust pressure according to claim 2 and prevent the device of exhaust gas recirculation,
Wherein, described gas guide blade unit comprises:
A plurality of blades are arranged on the internal surface of described fixed tube, and each in described a plurality of blades is arranged between adjacent reflux gas guide hole; And
Conical blade supportive body is positioned at the central part that above-mentioned a plurality of blade engages the described fixed tube at place.
4. elimination exhaust pressure according to claim 3 and prevent the device of exhaust gas recirculation, wherein, each in described a plurality of blades is all crooked, tilts at a predetermined angle in order to discharge direction with respect to waste gas.
5. elimination exhaust pressure according to claim 1 and prevent the device of exhaust gas recirculation also comprises:
The 3rd outlet pipe, arrange around described second exhaust pipe, be formed with locking aperture in an end of described the 3rd outlet pipe adjacent with described outlet pipe end, inserting lock(ing) bolt, thereby by the 3rd outlet pipe, second exhaust pipe be firmly fixed at outlet pipe.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070059152A KR100769700B1 (en) | 2007-06-15 | 2007-06-15 | Apparatus for preventing flowing backward of exhaust gas |
| KR1020070059152 | 2007-06-15 | ||
| KR10-2007-0059152 | 2007-06-15 | ||
| KR1020070100532A KR100929692B1 (en) | 2007-10-05 | 2007-10-05 | Exhaust gas backflow prevention device of internal combustion engine and boiler |
| KR1020070100532 | 2007-10-05 | ||
| KR10-2007-0100532 | 2007-10-05 | ||
| PCT/KR2007/004977 WO2008153247A1 (en) | 2007-06-15 | 2007-10-11 | Apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101688461A CN101688461A (en) | 2010-03-31 |
| CN101688461B true CN101688461B (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780053363.XA Expired - Fee Related CN101688461B (en) | 2007-06-15 | 2007-10-11 | Apparatus for removing exhaust gas pressure and preventing backflow of exhaust gas |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US20100307145A1 (en) |
| EP (1) | EP2162603A4 (en) |
| JP (1) | JP4988922B2 (en) |
| CN (1) | CN101688461B (en) |
| AU (1) | AU2007354986A1 (en) |
| WO (1) | WO2008153247A1 (en) |
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| US8650866B2 (en) * | 2010-06-14 | 2014-02-18 | Caterpillar Global Mining America Llc | Exhaust insert for exhaust port |
| KR101332259B1 (en) | 2011-08-12 | 2013-11-25 | 주식회사 한일월드 | Water purifier valve for preventing backward flow of dish washer |
| US10221747B2 (en) | 2014-08-21 | 2019-03-05 | Williams International Co., L.L.C. | Valvular-conduit manifold |
| CN104763508A (en) * | 2015-04-03 | 2015-07-08 | 中国能源建设集团山西省电力勘测设计院有限公司 | Device for preventing condensate water from refluxing for gas exhausting vertical tube of internal combustion engine |
| US10150438B2 (en) * | 2017-05-03 | 2018-12-11 | Nissan North America, Inc. | Rear exhaust finisher assembly |
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- 2007-10-11 JP JP2010512054A patent/JP4988922B2/en not_active Expired - Fee Related
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- 2007-10-11 WO PCT/KR2007/004977 patent/WO2008153247A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| US20100307145A1 (en) | 2010-12-09 |
| AU2007354986A1 (en) | 2008-12-18 |
| JP2010530040A (en) | 2010-09-02 |
| JP4988922B2 (en) | 2012-08-01 |
| US20130239557A1 (en) | 2013-09-19 |
| WO2008153247A1 (en) | 2008-12-18 |
| EP2162603A4 (en) | 2012-03-07 |
| EP2162603A1 (en) | 2010-03-17 |
| CN101688461A (en) | 2010-03-31 |
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