CN213235272U - EGR exhaust gas mixer structure - Google Patents
EGR exhaust gas mixer structure Download PDFInfo
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- CN213235272U CN213235272U CN202021793603.9U CN202021793603U CN213235272U CN 213235272 U CN213235272 U CN 213235272U CN 202021793603 U CN202021793603 U CN 202021793603U CN 213235272 U CN213235272 U CN 213235272U
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- pipe
- waste gas
- air inlet
- exhaust gas
- spray pipe
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Abstract
The utility model discloses a EGR exhaust gas mixer structure, include: the air inlet pipe is internally provided with an air inlet channel, one end of the air inlet channel is an air inlet end, and the other end of the air inlet channel is a mixed gas outlet end; the top of the air inlet pipe is provided with a through hole communicated with the air inlet channel; the lower end of the waste gas spray pipe penetrates through the through hole and is arranged in the air inlet channel, the upper end of the waste gas spray pipe is detachably connected with the air inlet pipe, and the upper end of the waste gas spray pipe is detachably communicated with the waste gas pipe; the bottom of the waste gas spray pipe is sealed, and the lower end of the side wall of the waste gas spray pipe is provided with a plurality of waste gas outlets which are distributed at intervals along the circumferential direction of the waste gas spray pipe; wherein, the internal diameter of waste gas spray pipe reduces from top to bottom gradually. Adopt the utility model discloses a waste gas spray tube not only can change the direction that waste gas flows, improves the degree of consistency of waste gas and air mixing, can also improve the velocity of flow of waste gas through the through flow area who reduces waste gas to further improve the degree of consistency of waste gas and air mixing.
Description
Technical Field
The utility model relates to an engine parts technical field, in particular to EGR exhaust gas mixer structure.
Background
An exhaust gas recirculation system, EGR for short, is one of the main measures to reduce the emission of nitrogen oxides (NOx) in the exhaust gas of a diesel engine; the principle is that partial waste gas in the exhaust pipe is reintroduced into the air inlet pipe through a pipeline and a control valve and enters the cylinder to participate in the combustion of the mixed gas, so that the working temperature and the oxygen content in the cylinder during the combustion are reduced, and the generation of nitrogen oxides (NOx) is inhibited. Most of the existing exhaust gas mixing methods are that exhaust gas is directly connected to an air inlet pipe through an exhaust pipe, and the exhaust gas is directly mixed with fresh air, but the mixing effect is not ideal, so that the EGR distribution uniformity of each cylinder is poor easily, and the performance and the emission effect of an engine are influenced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a EGR exhaust gas mixer structure to overcome current exhaust gas pipe and directly carry waste gas to the intake pipe in, lead to waste gas and the inhomogeneous shortcoming of air mixing easily.
In order to achieve the above object, the utility model provides a EGR exhaust gas mixer structure, include: the air inlet pipe is internally provided with an air inlet channel, one end of the air inlet channel is an air inlet end, and the other end of the air inlet channel is a mixed gas outlet end; the top of the air inlet pipe is provided with a through hole communicated with the air inlet channel; the lower end of the waste gas spray pipe penetrates through the through hole and is arranged in the air inlet channel, the upper end of the waste gas spray pipe is detachably connected with the air inlet pipe, and the upper end of the waste gas spray pipe is detachably communicated with the waste gas pipe; the bottom of the waste gas spray pipe is sealed, and the lower end of the side wall of the waste gas spray pipe is provided with a plurality of waste gas outlets which are distributed at intervals along the circumferential direction of the waste gas spray pipe; wherein, the internal diameter of this waste gas spray tube reduces from top to bottom gradually.
Preferably, in the above technical scheme, the exhaust gas nozzle includes, from top to bottom, a conical pipe and a cylindrical pipe, a lower end of the conical pipe is connected with an upper end of the cylindrical pipe, an inner diameter of the conical pipe is gradually reduced from top to bottom, and an inner diameter of the cylindrical pipe is not greater than an inner diameter of a lower end of the conical pipe; wherein all of the exhaust gas outlets are disposed on the cylindrical tube.
Preferably, in the above technical scheme, the upper end of the exhaust gas spray pipe is provided with a first connecting flange located at the outer side of the intake pipe, the outer side wall of the intake pipe is provided with a second connecting flange correspondingly connected with the first connecting flange, and the end of the exhaust gas pipe connected with the exhaust gas spray pipe is also provided with a third connecting flange correspondingly connected with the first connecting flange.
Preferably, in the above technical solution, the number of the exhaust gas outlets is three, the three exhaust gas outlets are uniformly distributed along the same circumferential direction, and one of the exhaust gas outlets is arranged facing the air inlet end.
Preferably, in the above technical solution, each exhaust gas outlet is a strip-shaped through hole, and the length of each strip-shaped through hole is distributed along the up-down direction.
Compared with the prior art, the utility model discloses following beneficial effect has:
the lower end of the waste gas spray pipe of the utility model is arranged in the air inlet channel, the upper end of the waste gas spray pipe is connected with the waste gas pipe, the bottom of the waste gas spray pipe is of a sealing structure, the lower end of the side wall of the waste gas pipe is provided with a plurality of waste gas outlets which are distributed at intervals along the circumferential direction of the waste gas pipe so as to change the flowing direction of the waste gas, thus leading the air flowing in from the air inlet end to be fully mixed with the waste gas sprayed out by the waste gas spray pipe, and further improving the mixing uniformity; and the inner diameter of the waste gas pipe is gradually reduced from top to bottom, the flow area of the waste gas is reduced, the flow rate of the waste gas is improved, and the mixing uniformity of the waste gas and the air is further improved.
Drawings
Fig. 1 is a schematic structural view of an EGR mixer structure according to the present invention.
Fig. 2 is a schematic top view of fig. 1 according to the present invention.
Fig. 3 is a schematic structural view of an exhaust gas nozzle according to the present invention.
Description of the main reference numerals:
1-exhaust gas nozzle, 11-conical pipe, 12-cylindrical pipe, 13-exhaust gas outlet, 14-first connecting flange, 2-exhaust gas pipe, 21-third connecting flange, 3-air inlet pipe, 31-air inlet channel and 32-second connecting flange.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Fig. 1 to 3 are schematic structural views showing an EGR mixer structure according to a preferred embodiment of the present invention, which includes an intake pipe 3 and an exhaust nozzle 1. Referring to fig. 1 to 3, an air inlet channel 31 is disposed in the air inlet pipe 3, and one end of the air inlet channel 31 is an air inlet end, and the other end of the air inlet channel 31 is a mixed gas outlet end. Wherein, the top of the air inlet pipe 3 is provided with a through hole communicated with the air inlet channel 31. The lower extreme of exhaust gas spray pipe 1 passes the through-hole and sets up in inlet channel 31, and the upper end of exhaust gas spray pipe 1 is connected with intake pipe 3 with the mode that can dismantle, the dismantlement of jet-propelled spray pipe 1 of being convenient for. And the upper end of the exhaust gas nozzle 1 is detachably communicated with the exhaust gas pipe 2 in a detachable manner to discharge the exhaust gas in the exhaust gas pipe 2 into the intake passage 31 through the exhaust gas nozzle 1. The bottom of exhaust gas spray pipe 1 sets up for sealing, and the lower extreme of exhaust gas spray pipe 1's lateral wall is equipped with a plurality of along its circumference direction interval distribution's exhaust outlet 13, changes the direction that waste gas flows out to the air that makes from air inlet end inflow can with the exhaust gas spray pipe 1 spun waste gas intensive mixing, and then improves the degree of consistency of waste gas and air mixing. Wherein, the internal diameter of waste gas spray tube 1 reduces from top to bottom gradually, reduces the through flow area of waste gas, improves the velocity of flow of waste gas to further improve waste gas and air mixing's degree of consistency.
Referring to fig. 1 to 3, preferably, the exhaust gas nozzle 1 includes a conical pipe 11 and a cylindrical pipe 12 from top to bottom, a lower end of the conical pipe 11 is connected with an upper end of the cylindrical pipe 12, and an inner diameter of the conical pipe 11 is gradually reduced from top to bottom to reduce a flow area of the exhaust gas, thereby increasing a flow velocity of the exhaust gas; the bottom of cylindrical pipe 12 is the setting of sealing, and the internal diameter of cylindrical pipe 12 is not more than the internal diameter of the lower extreme of circular cone pipe 11, and the internal diameter that is minimum on circular cone pipe 11 is not less than the condition in cylindrical pipe 12. Wherein all exhaust gas outlets 13 are arranged on the cylindrical tube 12.
Referring to fig. 1, preferably, the upper end of the exhaust gas nozzle 1 is provided with a first connecting flange 14 located at the outer side of the inlet pipe 3, the outer side wall of the inlet pipe 3 is provided with a second connecting flange 32 correspondingly connected with the first connecting flange 14, and one end of the exhaust gas pipe 2 connected with the exhaust gas nozzle 1 is also provided with a third connecting flange 21 correspondingly connected with the first connecting flange 14, so as to facilitate the connection and the disconnection of the exhaust gas nozzle 1 and the exhaust gas pipe 2.
Referring to fig. 1 to 3, preferably, the number of the exhaust gas outlets 13 on the exhaust gas nozzle 1 is three, the three exhaust gas outlets 13 are uniformly distributed along the same circumferential direction, and one of the exhaust gas outlets 13 is disposed facing the air inlet end, so that the flow direction of the exhaust gas flowing out from the exhaust gas outlet 13 is opposite to the air flowing direction, and the exhaust gas flowing out from the other two exhaust gas outlets 13 forms a certain included angle with the air flowing direction, thereby improving the mixing effect of the two. When the exhaust gas flow velocity is slow, the air flowing in from the air inlet end can also flow into the exhaust gas spray pipe 1 through the exhaust gas outlet 13 arranged opposite to the air inlet end, and after being fully mixed with the exhaust gas, the air flows out from the other two exhaust gas outlets 13 and is fully mixed with the air again, so that the mixing uniformity is improved.
Referring to fig. 1 and 3, preferably, each exhaust gas outlet 13 is a strip-shaped through hole, and the length of each strip-shaped through hole is distributed along the up-down direction, that is, the length of each strip-shaped through hole is distributed along the axial direction of the exhaust gas nozzle 1, so as to improve the uniformity of the mixing of the exhaust gas and the air.
Adopt the utility model discloses a waste gas spray tube 1 not only can change the direction that waste gas flows, improves the degree of consistency of waste gas and air mixing, can also improve the velocity of flow of waste gas through the through flow area who reduces waste gas to further improve the degree of consistency of waste gas and air mixing, make air and waste gas can the intensive mixing.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (5)
1. An EGR exhaust mixer structure, comprising:
the air inlet pipe is internally provided with an air inlet channel, one end of the air inlet channel is an air inlet end, and the other end of the air inlet channel is a mixed gas outlet end; the top of the air inlet pipe is provided with a through hole communicated with the air inlet channel; and
the lower end of the waste gas spray pipe penetrates through the through hole and is arranged in the air inlet channel, the upper end of the waste gas spray pipe is detachably connected with the air inlet pipe, and the upper end of the waste gas spray pipe is detachably communicated with the waste gas pipe; the bottom of the waste gas spray pipe is sealed, and the lower end of the side wall of the waste gas spray pipe is provided with a plurality of waste gas outlets which are distributed at intervals along the circumferential direction of the waste gas spray pipe; wherein, the internal diameter of this waste gas spray tube reduces from top to bottom gradually.
2. The EGR exhaust gas mixer structure according to claim 1, wherein the exhaust gas nozzle comprises, from top to bottom, a conical pipe and a cylindrical pipe, a lower end of the conical pipe is connected to an upper end of the cylindrical pipe, an inner diameter of the conical pipe is gradually reduced from top to bottom, and the inner diameter of the cylindrical pipe is not larger than the inner diameter of the lower end of the conical pipe; wherein all of the exhaust gas outlets are disposed on the cylindrical tube.
3. The EGR mixer structure of claim 1, wherein the upper end of the exhaust nozzle is provided with a first connecting flange located outside the intake pipe, the outer side wall of the intake pipe is provided with a second connecting flange correspondingly connected to the first connecting flange, and one end of the exhaust pipe connected to the exhaust nozzle is also provided with a third connecting flange correspondingly connected to the first connecting flange.
4. The EGR exhaust gas mixer structure according to claim 1, wherein the number of the exhaust gas outlets is three, the three exhaust gas outlets are evenly distributed in the same circumferential direction, and one of the exhaust gas outlets is disposed facing the air intake end.
5. The EGR exhaust gas mixer structure according to claim 1, wherein each of the exhaust gas outlets is a strip-shaped through hole, and a length of each of the strip-shaped through holes is distributed in an up-down direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021793603.9U CN213235272U (en) | 2020-08-25 | 2020-08-25 | EGR exhaust gas mixer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021793603.9U CN213235272U (en) | 2020-08-25 | 2020-08-25 | EGR exhaust gas mixer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213235272U true CN213235272U (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021793603.9U Active CN213235272U (en) | 2020-08-25 | 2020-08-25 | EGR exhaust gas mixer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213235272U (en) |
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2020
- 2020-08-25 CN CN202021793603.9U patent/CN213235272U/en active Active
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