Tail gas after-treatment device

Abstract

A tail gas after-treatment device comprises a gas inlet assembly, a tail gas after-treatment assembly, a gas outlet assembly and a mounting support assembly. The air inlet assembly comprises an air inlet shell and an air inlet pipe. The mounting bracket assembly comprises a first bracket and a second bracket. The first bracket comprises a first arc-shaped mounting part and a first fixing part; and the second bracket comprises a second arc-shaped mounting part and a second fixing part. The first fixing part and the second fixing part are welded and fixed to the air outlet assembly. And the middle part of the first arc-shaped mounting part protrudes towards the second arc-shaped mounting part. And the middle part of the second arc-shaped mounting part protrudes towards the first arc-shaped mounting part. Through the arrangement, the structural strength of the first arc-shaped mounting part and the second arc-shaped mounting part can be optimized, and the requirement for the arrangement space of the whole vehicle can be met.

Description

Technical Field

[0001] The present invention relates to an exhaust gas aftertreatment device, belonging to the technical field of engine exhaust gas aftertreatment. Background Art

[0002] The exhaust gas aftertreatment devices in the related art generally include an intake assembly, an exhaust gas aftertreatment assembly, and an air intake assembly. The intake assembly includes an intake end cap and an intake pipe. The exhaust gas aftertreatment assembly includes a housing and an exhaust gas aftertreatment carrier encapsulated in the housing. The air intake assembly includes an air outlet end cap and an air outlet pipe. The intake pipe and the air outlet pipe are respectively fixed to the intake end cap and the air outlet end cap.

[0003] There is still room for improvement in the exhaust gas aftertreatment devices in the related art. Summary of the Invention

[0004] The purpose of the present invention is to provide an exhaust gas aftertreatment device with an improved structure.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: An exhaust gas aftertreatment device includes an intake assembly, an exhaust gas aftertreatment assembly connected to the intake assembly, an air outlet assembly connected to the exhaust gas aftertreatment assembly, and a mounting bracket assembly. The intake assembly includes an intake housing and an intake pipe connected to the intake housing. The intake housing is provided with a first space, and the intake pipe is connected to the first space. The exhaust gas aftertreatment assembly includes a housing and an exhaust gas aftertreatment carrier encapsulated in the housing. The air outlet assembly includes an air outlet housing and an air outlet pipe connected to the air outlet housing. The air outlet housing is provided with a second space, and the air outlet pipe is connected to the second space. The first space and the second space are respectively located at both ends of the exhaust gas aftertreatment assembly and are both connected to the exhaust gas aftertreatment carrier. The mounting bracket assembly includes a first bracket and a second bracket. The first bracket includes a first arc-shaped mounting portion and a first fixing portion. The second bracket includes a second arc-shaped mounting portion and a second fixing portion. The first fixing portion and the second fixing portion are welded and fixed to the air outlet assembly. The middle of the first arc-shaped mounting portion bulges towards the second arc-shaped mounting portion, and the middle of the second arc-shaped mounting portion bulges towards the first arc-shaped mounting portion.

[0006] As a further improved technical solution of the present invention, the air outlet assembly includes a silencing pipe connected to the air outlet pipe. The silencing pipe includes an inner pipe, an outer pipe, and sound-absorbing cotton filled between the inner pipe and the outer pipe. The inner pipe is connected to the air outlet pipe, the outer pipe is wrapped around the inner pipe, and the inner pipe is provided with a plurality of sound-absorbing holes penetrating through its wall.

[0007] As a further improved technical solution of the present invention, the tail gas aftertreatment device further includes a connecting piece, one end of the connecting piece is welded and fixed to the outer tube, and the other end of the connecting piece is welded and fixed to the intake housing.

[0008] As a further improved technical solution of the present invention, the intake housing includes a first annular wall and a first end plate connected to the first annular wall and located at one end of the first annular wall. The first space is provided in the first annular wall. The first end plate is provided with a first raised portion formed by stamping outward, and a first groove communicating with the first space is provided on the back surface of the first raised portion.

[0009] As a further improved technical solution of the present invention, the outlet housing includes a second annular wall and a second end plate connected to the second annular wall and located at one end of the second annular wall. The second space is provided in the second annular wall. The second end plate is provided with a second raised portion formed by stamping outward, and the outlet pipe is attached to the inner side of the second raised portion.

[0010] As a further improved technical solution of the present invention, the second end plate further includes a first mounting portion located on one side of the second raised portion and a second mounting portion located on the other side of the second raised portion;

[0011] The first fixing portion protrudes from the first arc-shaped mounting portion, and the first arc-shaped mounting portion and the first fixing portion are integrally formed;

[0012] The second fixing portion protrudes from the second arc-shaped mounting portion, and the second arc-shaped mounting portion and the second fixing portion are integrally formed;

[0013] The first fixing portion is welded and fixed to the first mounting portion, the second fixing portion is welded and fixed to the second mounting portion, and the first fixing portion and the second fixing portion are respectively located on both sides of the second raised portion.

[0014] As a further improved technical solution of the present invention, the second fixing portion is welded and fixed to the outlet pipe.

[0015] As a further improved technical solution of the present invention, the first arc-shaped mounting portion is provided with a plurality of first mounting through holes penetrating the first arc-shaped mounting portion, and the second arc-shaped mounting portion is provided with a plurality of second mounting through holes penetrating the second arc-shaped mounting portion.

[0016] As a further improved technical solution of the present invention, the tail gas aftertreatment device includes a heat preservation shell, and the heat preservation shell includes a first heat preservation shell, wherein the first heat preservation shell at least partially wraps the first annular wall, the housing and the second annular wall, and the first heat preservation shell is a split-type heat preservation shell.

[0017] As a further improved technical solution of the present invention, the heat preservation shell includes a second heat preservation shell, and at least part of the second heat preservation shell is wrapped around the pipe body of the air outlet pipe extending out of the second annular wall. The second heat preservation shell is a split-type heat preservation shell body.

[0018] As a further improved technical solution of the present invention, the mounting bracket assembly includes a third bracket, the third bracket is welded and fixed to the inner side of the first heat preservation shell, and the third bracket is provided with a protruding portion protruding from the first heat preservation shell, a first support portion connected to one side of the protruding portion, a second support portion connected to the other side of the protruding portion, and a groove portion located between the first support portion and the second support portion. The first support portion is provided with a first mounting hole, and the second support portion is provided with a second mounting.

[0019] As a further improved technical solution of the present invention, the air intake assembly includes a spoiler installed in the air intake housing. The spoiler is welded and fixed to the inner wall surface of the first annular wall and is located in the first space. The spoiler includes a first spoiler piece and a second spoiler piece. The first spoiler piece and the second spoiler piece are separately arranged, and the first spoiler piece is located inside the second spoiler piece.

[0020] Compared with the prior art, the exhaust gas aftertreatment device of the present invention includes an air intake assembly, an exhaust gas aftertreatment assembly connected to the air intake assembly, an air outlet assembly connected to the exhaust gas aftertreatment assembly, and a mounting bracket assembly; the mounting bracket assembly includes a first bracket and a second bracket. The first bracket includes a first arc-shaped mounting portion and a first fixing portion, and the second bracket includes a second arc-shaped mounting portion and a second fixing portion. The first fixing portion and the second fixing portion are welded and fixed to the air outlet assembly. The middle of the first arc-shaped mounting portion bulges towards the second arc-shaped mounting portion, and the middle of the second arc-shaped mounting portion bulges towards the first arc-shaped mounting portion. With such a setting, the present invention is beneficial to optimizing the structural strength of the first arc-shaped mounting portion and the second arc-shaped mounting portion, and is beneficial to meeting the requirements of the vehicle layout space. Description of the Drawings

[0021] Figure 1 is a three-dimensional schematic diagram of the exhaust gas aftertreatment device of the present invention in one embodiment.

[0022] Figure 2 is Figure 1 a partial three-dimensional exploded view of, in which some parts are exploded.

[0023] Figure 3 is a three-dimensional exploded view of the air intake assembly from another angle.

[0024] Figure 4 is Figure 1Front view of

[0025] Figure 5 is Figure 1 Top view of

[0026] Figure 6 is Figure 1 Bottom view of

[0027] Figure 7 is Figure 1 Left view of

[0028] Figure 8 is Figure 1 Right view of

[0029] Figure 9 is a schematic cross-sectional view along line A-A in Figure 8 Specific embodiments Specific embodiments

[0030] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. Among them, if there are several specific embodiments, the features in these embodiments can be combined with each other without conflict. When the description involves the accompanying drawings, unless otherwise specified, the same numbers or symbols in different drawings represent the same or similar elements. The content described in the following exemplary specific embodiments does not represent all embodiments of the present invention. On the contrary, they are only examples of products that are consistent with the present invention as recorded in the claims of the present invention.

[0031] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the protection scope of the present invention. It should be understood that the terms used in the description and claims of the present invention, such as "first", "second" and similar terms, do not represent any order, quantity or importance, but are only used to distinguish the named features.

[0032] Please refer to Figures 1 to 9 As shown, the present invention discloses an exhaust gas aftertreatment device 100, which is applicable to treating the exhaust gas of a natural gas engine. The exhaust gas aftertreatment device 100 includes an intake assembly 10, an exhaust gas aftertreatment assembly 20 connected to the intake assembly 10, an outlet assembly 30 connected to the exhaust gas aftertreatment assembly 20, a heat insulation shell 40 installed on the intake assembly 10, the exhaust gas aftertreatment assembly 20 and the outlet assembly 30, and a mounting bracket assembly 50 fixed on the exhaust gas aftertreatment assembly 20.

[0033] In the illustrated embodiment of the present invention, the intake assembly 10 includes an intake housing 11, an intake pipe 12 connected to the intake housing 11, and a spoiler 13 installed in the intake housing 11. In the illustrated embodiment of the present invention, the intake housing 11 is generally cylindrical, and includes a first annular wall 111 and a first end plate 112 connected to the first annular wall 111 and located at one end of the first annular wall 111. The first annular wall 111 is provided with a first space 1111. The intake pipe 12 is welded and fixed to the first annular wall 111 and communicates with the first space 1111. The first end plate 112 is provided with a first raised portion 1121 formed by outward stamping. The back surface of the first raised portion 1121 is provided with a first groove 1122 communicating with the first space 1111. The first raised portion 1121 is beneficial to increasing the structural strength of the intake housing 11 on the one hand, and is beneficial to adjusting the air flow distribution through the groove 1121 on the other hand.

[0034] In the illustrated embodiment of the present invention, the spoiler 13 is welded and fixed to the inner wall surface of the first annular wall 111 and is located in the first space 1111. The spoiler 13 is used to evenly distribute the air flow flowing from the intake pipe 12 into the first space 1111 to the carrier inlet end surface of the exhaust gas aftertreatment assembly 20. Specifically, in the illustrated embodiment of the present invention, the spoiler 13 includes a first spoiler piece 131 and a second spoiler piece 132 that are separately arranged, and the first spoiler piece 131 is located inside the second spoiler piece 132.

[0035] The exhaust gas aftertreatment assembly 20 includes a housing 21 and an exhaust gas aftertreatment carrier 22 encapsulated in the housing 21. One end of the housing 21 is connected to the first annular wall 111, and the other end of the housing 21 is connected to the outlet assembly 30.

[0036] In the illustrated embodiment of the present invention, the exhaust gas aftertreatment carrier 22 includes a first exhaust gas aftertreatment carrier 221 and a second exhaust gas aftertreatment carrier 222 that are spaced apart. An interval space 223 is provided between the first exhaust gas aftertreatment carrier 221 and the second exhaust gas aftertreatment carrier 222.

[0037] The air outlet assembly 30 includes an air outlet housing 31, an air outlet pipe 32 connected to the air outlet housing 31, and a silencing pipe 33 connected to the air outlet pipe 32. In the illustrated embodiment of the present invention, the air outlet housing 31 is generally cylindrical, and includes a second annular wall 311 and a second end plate 312 connected to the second annular wall 311 and located at one end of the second annular wall 311. The second annular wall 311 is provided with a second space 3111. The air outlet pipe 32 is welded and fixed to the second annular wall 311 and communicates with the second space 3111. The second end plate 312 is provided with a second raised portion 3121 formed by outward stamping. The second raised portion 3121 is beneficial to increasing the structural strength of the air outlet housing 31. The back surface of the second raised portion 3121 is provided with a second groove 3122 communicating with the second space 3111. In the illustrated embodiment of the present invention, the second groove 3122 is arc-shaped to better fit the cylindrical air outlet pipe 32 to improve reliability. The fitting design of the air outlet housing 31 and the air outlet pipe 32 can reduce the gas flow noise, and further noise reduction is achieved through the silencing pipe 33, which can further improve the exhaust noise and meet the acoustic requirements. In addition, the second end plate 312 is further provided with a first mounting portion 3123 on one side of the second raised portion 3121 and a second mounting portion 3124 on the other side of the second raised portion 3121.

[0038] The silencing pipe 33 includes an inner pipe 331, an outer pipe 332, and sound-absorbing cotton 333 filled between the inner pipe 331 and the outer pipe 332. The inner pipe 331 is connected to the air outlet pipe 32, and the outer pipe 332 is wrapped around the inner pipe 331. The inner pipe 331 is provided with a plurality of sound-absorbing holes 3310 penetrating through its wall.

[0039] The exhaust gas aftertreatment device 100 further includes a connecting piece 6. One end of the connecting piece 6 is welded and fixed to the outer pipe 332, and the other end of the connecting piece 6 is welded and fixed to the intake housing 11. The connecting piece 6 can play a role in strengthening the structural strength.

[0040] In the illustrated embodiment of the present invention, the heat insulation shell 40 includes a first heat insulation shell 41 and a second heat insulation shell 42, wherein the first heat insulation shell 41 at least partially wraps around the first annular wall 111, the housing 21, and the second annular wall 311. In the illustrated embodiment of the present invention, the first heat insulation shell 41 is a split-type heat insulation shell. In the illustrated embodiment of the present invention, the first heat insulation shell 41 is welded and fixed to the first annular wall 111, the housing 21, and the second annular wall 311.

[0041] The second heat preservation shell 42 is at least partially wrapped on the pipe body of the air outlet pipe 32 extending out of the second annular wall 311. In the illustrated embodiment of the present invention, the second heat preservation shell 42 is a split heat preservation shell. In the illustrated embodiment of the present invention, the second heat preservation shell 42 is fixedly welded on the pipe body of the air outlet pipe 32 extending out of the second annular wall 311.

[0042] The mounting bracket assembly 50 includes a first bracket 51, a second bracket 52 and a third bracket 53. The first bracket 51 includes a first arc-shaped mounting portion 511 and a first fixing portion 512 protruding from the first arc-shaped mounting portion 511. In an embodiment of the present invention, the first arc-shaped mounting portion 511 and the first fixing portion 512 are integrally formed. The first fixing portion 512 is at least partially located on one side of the first arc-shaped mounting portion 511. In an embodiment of the present invention, there are at least two first fixing portions 512 and they are respectively located on both sides of the first arc-shaped mounting portion 511.

[0043] The second bracket 52 includes a second arc-shaped mounting portion 521 and a second fixing portion 522 protruding from the second arc-shaped mounting portion 521. In an embodiment of the present invention, the second arc-shaped mounting portion 521 and the second fixing portion 522 are integrally formed. The second fixing portion 522 is at least partially located on one side of the second arc-shaped mounting portion 521. In an embodiment of the present invention, there are at least two second fixing portions 522 and they are respectively located on both sides of the second arc-shaped mounting portion 521.

[0044] In the illustrated embodiment of the present invention, the first arc-shaped mounting portion 511 and the second arc-shaped mounting portion 521 are substantially in a V shape, that is, the middle of the first arc-shaped mounting portion 511 bulges towards the second arc-shaped mounting portion 521, and the middle of the second arc-shaped mounting portion 521 bulges towards the first arc-shaped mounting portion 511. With such a setting, it is beneficial to optimize the structural strength of the first arc-shaped mounting portion 511 and the second arc-shaped mounting portion 521, and it is beneficial to meet the vehicle layout space requirements. The first arc-shaped mounting portion 511 is provided with a plurality of first mounting through holes 5111 penetrating the first arc-shaped mounting portion 511, and the second arc-shaped mounting portion 521 is provided with a plurality of second mounting through holes 5211 penetrating the second arc-shaped mounting portion 521. The first mounting through holes 5111 and the second mounting through holes 5211 are configured to be connected to a vehicle body bracket (not shown) through fixing members (not shown).

[0045] It should be noted that there may be some inaccuracies in the translation due to the complexity of the patent text. It is recommended to further verify and adjust according to the specific technical content.In the illustrated embodiment of the present invention, the first fixing portion 512 is welded and fixed to the first mounting portion 3123, and the second fixing portion 522 is welded and fixed to the second mounting portion 3124 and the air outlet pipe 32. The first fixing portion 512 and the second fixing portion 522 are respectively located on both sides of the second raised portion 3121.

[0046] The third bracket 53 is welded and fixed to the inner side of the first heat insulation shell 41. The third bracket 53 is provided with a raised portion 530 protruding from the first heat insulation shell 41, a first support portion 531 connected to one side of the raised portion 530, a second support portion 532 connected to the other side of the raised portion 530, and a groove portion 533 located between the first support portion 531 and the second support portion 532. The raised portion 530 is arc-shaped to improve stress distribution. The first support portion 531 is provided with a first mounting hole 5311, and the second support portion 532 is provided with a second mounting hole 5321. The first mounting hole 5311 and the second mounting hole 5321 are configured to be connected to a vehicle body bracket (not shown) through a fixing member (not shown).

[0047] The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art of the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the relevant technical field can still modify the present invention or make equivalent replacements. All technical solutions and their improvements that do not depart from the spirit and scope of the present invention shall be covered within the scope of the claims of the present invention.

Claims

1. An exhaust gas post-treatment device, characterized in that: The invention comprises an air intake assembly, an exhaust gas aftertreatment assembly connected to the air intake assembly, an air outlet assembly connected to the exhaust gas aftertreatment assembly, and a mounting bracket assembly; the air intake assembly comprises an air intake shell and an air intake pipe connected to the air intake shell, the air intake shell is provided with a first space, and the air intake pipe is connected to the first space; the exhaust gas aftertreatment assembly comprises a shell and an exhaust gas aftertreatment carrier encapsulated in the shell; the air outlet assembly comprises an air outlet shell and an air outlet pipe connected to the air outlet shell; the air outlet shell is provided with a second space, and the air outlet pipe is connected to the second space; the first space and the second space are respectively located at two ends of the exhaust gas aftertreatment assembly, and are both connected to the exhaust gas aftertreatment carrier; the mounting bracket assembly comprises a first bracket and a second bracket, the first bracket comprises a first arc-shaped mounting portion and a first fixing portion, the second bracket comprises a second arc-shaped mounting portion and a second fixing portion, the first fixing portion and the second fixing portion are welded and fixed to the air outlet assembly, the middle portion of the first arc-shaped mounting portion bulges toward the second arc-shaped mounting portion, and the middle portion of the second arc-shaped mounting portion bulges toward the first arc-shaped mounting portion.

2. The exhaust gas post-treatment device according to claim 1, characterized in that: The air outlet assembly includes a silencer pipe connected to the air outlet pipe, the silencer pipe includes an inner pipe, an outer pipe and silencer cotton filled between the inner pipe and the outer pipe; the inner pipe is connected to the air outlet pipe, the outer pipe is wrapped around the inner pipe, and the inner pipe is provided with a plurality of silencer holes penetrating its wall.

3. The exhaust gas post-treatment device according to claim 2, characterized in that: The exhaust gas after-treatment device further comprises a connecting piece, one end of which is welded and fixed to the outer tube, and the other end of which is welded and fixed to the intake housing.

4. The exhaust gas post-treatment device according to claim 1, characterized in that: The air intake housing includes a first annular wall and a first end plate connected to the first annular wall and located at one end of the first annular wall. The first space is arranged in the first annular wall. The first end plate is provided with a first protrusion formed by stamping outward. The back side of the first protrusion is provided with a first groove connected to the first space.

5. The exhaust gas post-treatment device according to claim 4, characterized in that: The air outlet housing includes a second annular wall and a second end plate connected to the second annular wall and located at one end of the second annular wall. The second space is arranged in the second annular wall. The second end plate is provided with a second protrusion formed by stamping outward, and the air outlet pipe is attached to the inner side of the second protrusion.

6. The exhaust gas post-treatment device according to claim 5, characterized in that: The second end plate is further provided with a first mounting portion located on one side of the second raised portion and a second mounting portion located on the other side of the second raised portion; The first fixing portion protrudes from the first arc-shaped mounting portion, and the first arc-shaped mounting portion and the first fixing portion are integrally formed; The second fixing portion protrudes from the second arc-shaped mounting portion, and the second arc-shaped mounting portion and the second fixing portion are integrally formed; The first fixing portion is fixed to the first mounting portion by welding, and the second fixing portion is fixed to the second mounting portion by welding. The first fixing portion and the second fixing portion are respectively located at two sides of the second raised portion.

7. The exhaust gas post-treatment device according to claim 6, characterized in that: The second fixing portion is fixed to the air outlet pipe by welding.

8. The exhaust gas post-treatment device according to claim 1, characterized in that: The first arc-shaped mounting portion is provided with a plurality of first mounting through holes penetrating the first arc-shaped mounting portion, and the second arc-shaped mounting portion is provided with a plurality of second mounting through holes penetrating the second arc-shaped mounting portion.

9. The exhaust gas post-treatment device according to claim 5, characterized in that: The exhaust gas aftertreatment device includes an insulation shell, which includes a first insulation shell, wherein the first insulation shell is at least partially wrapped around the first annular wall, the shell and the second annular wall, and the first insulation shell is a two-half insulation shell.

10. The exhaust gas post-treatment device according to claim 9, characterized in that: The heat-insulating shell includes a second heat-insulating shell, the second heat-insulating shell at least partially wraps around the tube body of the outlet pipe extending out of the second annular wall, and the second heat-insulating shell is a two-half heat-insulating shell.

11. The exhaust gas post-treatment device according to claim 9, characterized in that: The mounting bracket assembly includes a third bracket, which is welded and fixed to the inner side of the first insulation shell. The third bracket is provided with a protruding portion protruding from the first insulation shell, a first supporting portion connected to one side of the protruding portion, a second supporting portion connected to the other side of the protruding portion, and a groove portion located between the first supporting portion and the second supporting portion, the first supporting portion is provided with a first mounting hole, and the second supporting portion is provided with a second mounting.

12. The exhaust gas post-treatment device according to claim 4, characterized in that: The air intake assembly includes a spoiler installed in the air intake housing, the spoiler is welded and fixed to the inner wall surface of the first annular wall and is located in the first space, the spoiler includes a first spoiler and a second spoiler, the first spoiler and the second spoiler are separately arranged, and the first spoiler is located on the inner side of the second spoiler.

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