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. By means of the arrangement, the structural strength of the first arc-shaped installation part and the second arc-shaped installation part can be optimized, and the requirement for arrangement space of a whole vehicle can be met.

Description

Technical Field

[0001] This utility model relates to an exhaust gas aftertreatment device, belonging to the field of engine exhaust gas aftertreatment technology. Background Technology

[0002] Related exhaust aftertreatment devices typically include an intake assembly, an exhaust aftertreatment assembly, and an intake component. The intake assembly includes an intake end cap and an intake pipe. The exhaust aftertreatment assembly includes a housing and an exhaust aftertreatment carrier encapsulated within the housing. The intake assembly also includes an outlet end cap and an outlet pipe. The intake pipe and the outlet pipe are respectively fixed to the intake end cap and the outlet end cap.

[0003] There is still room for improvement in exhaust gas aftertreatment devices in related technologies. Utility Model Content

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

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an exhaust gas aftertreatment device, comprising an intake assembly, an exhaust gas aftertreatment assembly connected to the intake assembly, an exhaust gas aftertreatment 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 having a first space, and the intake pipe communicating with the first space; the exhaust gas aftertreatment assembly includes a housing and an exhaust gas aftertreatment carrier encapsulated in the housing; the exhaust gas aftertreatment assembly includes an exhaust gas housing and an exhaust gas pipe connected to the exhaust gas housing; the exhaust gas housing has a first space... The first space and the second space are connected to the exhaust pipe; the first space and the second space are 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 part and a first fixing part, the second bracket includes 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 exhaust gas assembly, 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.

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

[0007] As a further improvement of the present invention, the exhaust gas aftertreatment device further includes a connecting piece, one end of which is welded and fixed to the outer pipe, and the other end of which is welded and fixed to the intake housing.

[0008] As a further improvement of the present invention, 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 disposed in the first annular wall. The first end plate is provided with a first protrusion formed by outward stamping. The back side of the first protrusion is provided with a first groove communicating with the first space.

[0009] As a further improvement of the present invention, 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 disposed in the second annular wall. The second end plate is provided with a second protrusion formed by outward stamping. The air outlet pipe is attached to the inner side of the second protrusion.

[0010] As a further improvement of the present invention, the second end plate is further provided with a first mounting part located on one side of the second raised portion and a second mounting part located on the other side of the second raised portion.

[0011] The first fixing part protrudes from the first arc-shaped mounting part, and the first arc-shaped mounting part is integrally formed with the first fixing part;

[0012] The second fixing part protrudes from the second arc-shaped mounting part, and the second arc-shaped mounting part is integrally formed with the second fixing part;

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

[0014] As a further improvement of this utility model, the second fixing part is welded and fixed to the air outlet pipe.

[0015] As a further improvement 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 improvement of the present invention, the exhaust gas aftertreatment device includes a heat insulation shell, the heat insulation shell includes a first heat insulation shell, wherein the first heat insulation shell at least partially wraps around the first annular wall, the shell and the second annular wall, and the first heat insulation shell is a two-half heat insulation shell.

[0017] As a further improvement of the present invention, the heat insulation shell includes a second heat insulation shell, which at least partially wraps around the tube body of the air outlet extending out of the second annular wall, and the second heat insulation shell is a two-half heat insulation shell.

[0018] As a further improvement of the present invention, 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 has a protrusion protruding from the first insulation shell, a first support portion connected to one side of the protrusion, a second support portion connected to the other side of the protrusion, and a groove portion located between the first support portion and the second support portion. The first support portion has a first mounting hole, and the second support portion has a second mounting hole.

[0019] As a further improvement 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 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 inside the second spoiler.

[0020] Compared to existing technologies, the exhaust aftertreatment device of this utility model includes an intake assembly, an exhaust aftertreatment assembly connected to the intake assembly, an exhaust aftertreatment assembly connected to the exhaust 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 exhaust assembly. The middle portion of the first arc-shaped mounting portion protrudes towards the second arc-shaped mounting portion, and the middle portion of the second arc-shaped mounting portion protrudes towards the first arc-shaped mounting portion. This design optimizes the structural strength of the first and second arc-shaped mounting portions and better meets the space requirements of the vehicle layout. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of one embodiment of the exhaust gas aftertreatment device of this utility model.

[0022] Figure 2 yes Figure 1 A partial exploded 3D diagram, in which some parts are exposed by the explosion.

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

[0024] Figure 4 yes Figure 1 The main view.

[0025] Figure 5 yes Figure 1 Top view.

[0026] Figure 6 yes Figure 1 A bottom view.

[0027] Figure 7 yes Figure 1 The left view.

[0028] Figure 8 yes Figure 1 The right view.

[0029] Figure 9 It is along Figure 8 A cross-sectional view of line AA in the middle. Detailed Implementation

[0030] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Where several specific embodiments exist, features in these embodiments can be combined with each other without conflict. When the description relates to the drawings, unless otherwise stated, the same numbers or symbols in different drawings represent the same or similar elements. The content described in the following exemplary embodiments does not represent all embodiments of this utility model; rather, they are merely examples of products consistent with this utility model and as described in the claims.

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

[0032] Please refer to Figures 1 to 9 As shown, this utility model discloses an exhaust gas aftertreatment device 100, suitable for 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 exhaust gas aftertreatment assembly 20 connected to the exhaust gas aftertreatment assembly 20, a heat insulation shell 40 mounted on the intake assembly 10, the exhaust gas aftertreatment assembly 20, and the exhaust gas assembly 30, and a mounting bracket assembly 50 fixed on the exhaust gas aftertreatment assembly 20.

[0033] In the embodiment illustrated in this utility model, the air intake assembly 10 includes an air intake housing 11, an air intake pipe 12 connected to the air intake housing 11, and a spoiler 13 installed in the air intake housing 11. In this embodiment illustrated in this utility model, the air intake housing 11 is generally cylindrical, including a first annular wall 111 and a first end plate 112 connected to and located at one end of the first annular wall 111. The first annular wall 111 has a first space 1111. The air 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 has a first protrusion 1121 formed by outward stamping. The back side of the first protrusion 1121 has a first groove 1122 communicating with the first space 1111. The first protrusion 1121 helps to increase the structural strength of the air intake housing 11 and also helps to adjust the airflow distribution through the groove 1121.

[0034] In the embodiment illustrated in this utility model, the spoiler 13 is welded and fixed to the inner wall surface of the first annular wall 111 and located in the first space 1111. The spoiler 13 is used to evenly distribute the airflow flowing from the intake pipe 12 into the first space 1111 onto the carrier inlet end face of the exhaust gas aftertreatment assembly 20. Specifically, in the embodiment illustrated in this utility model, the spoiler 13 includes a separately arranged first spoiler 131 and a second spoiler 132, with the first spoiler 131 located inside the second spoiler 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 exhaust gas assembly 30.

[0036] In the embodiment illustrated in this utility model, the exhaust gas aftertreatment carrier 22 includes a first exhaust gas aftertreatment carrier 221 and a second exhaust gas aftertreatment carrier 222 disposed at an interval. A space 223 is provided between the first exhaust gas aftertreatment carrier 221 and the second exhaust gas aftertreatment carrier 222.

[0037] The venting assembly 30 includes a venting housing 31, a venting pipe 32 connected to the venting housing 31, and a silencer pipe 33 connected to the venting pipe 32. In the embodiment illustrated in this utility model, the venting housing 31 is generally cylindrical, including a second annular wall 311 and a second end plate 312 connected to and located at one end of the second annular wall 311. The second annular wall 311 has a second space 3111. The venting pipe 32 is welded and fixed to the second annular wall 311 and communicates with the second space 3111. The second end plate 312 has a second protrusion 3121 formed by outward stamping. The second protrusion 3121 helps to increase the structural strength of the venting housing 31. The back side of the second protrusion 3121 has a second groove 3122 that communicates with the second space 3111. In the embodiment illustrated in this utility model, the second groove 3122 is arc-shaped to better fit the cylindrical exhaust pipe 32, thereby improving reliability. The fitting design between the exhaust housing 31 and the exhaust pipe 32 reduces gas flow noise, and further noise reduction via the silencer pipe 33 further improves exhaust noise and meets acoustic requirements. Additionally, the second end plate 312 is 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 silencer 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 its wall.

[0039] The exhaust gas aftertreatment device 100 also includes a connecting piece 6, one end of which is welded and fixed to the outer pipe 332, and the other end of which is welded and fixed to the intake housing 11. The connecting piece 6 can strengthen the structural strength.

[0040] In the embodiment illustrated in this utility model, the heat-insulating shell 40 includes a first heat-insulating shell 41 and a second heat-insulating shell 42, wherein the first heat-insulating shell 41 at least partially wraps around the first annular wall 111, the shell 21, and the second annular wall 311. In the embodiment illustrated in this utility model, the first heat-insulating shell 41 is a two-half heat-insulating shell. In the embodiment illustrated in this utility model, the first heat-insulating shell 41 is welded and fixed to the first annular wall 111, the shell 21, and the second annular wall 311.

[0041] The second insulation shell 42 at least partially wraps around the pipe body of the vent pipe 32 extending out of the second annular wall 311. In the embodiment illustrated in the present invention, the second insulation shell 42 is a two-part insulation shell. In the embodiment illustrated in the present invention, the second insulation shell 42 is welded and fixed to the pipe body of the vent 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 one 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 one embodiment of the present invention, there are at least two first fixing portions 512, 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 one 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 one embodiment of the present invention, there are at least two second fixing portions 522, respectively located on both sides of the second arc-shaped mounting portion 521.

[0044] In the embodiment illustrated in this utility model, the first arc-shaped mounting portion 511 and the second arc-shaped mounting portion 521 are approximately V-shaped, meaning that the middle portion of the first arc-shaped mounting portion 511 protrudes towards the second arc-shaped mounting portion 521, and the middle portion of the second arc-shaped mounting portion 521 protrudes towards the first arc-shaped mounting portion 511. This arrangement helps optimize the structural strength of the first arc-shaped mounting portion 511 and the second arc-shaped mounting portion 521, and also helps meet the space requirements of the vehicle layout. 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 the vehicle body bracket (not shown) via a fastener (not shown).

[0045] In the embodiment illustrated in this utility model, the first fixing part 512 is welded and fixed to the first mounting part 3123, and the second fixing part 522 is welded and fixed to the second mounting part 3124 and the air outlet pipe 32. The first fixing part 512 and the second fixing part 522 are respectively located on both sides of the second raised part 3121.

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

[0047] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A tail gas aftertreatment device, characterized in that: The system includes an intake assembly, an exhaust aftertreatment assembly connected to the intake assembly, an exhaust assembly connected to the exhaust 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 has a first space, and the intake pipe communicates with the first space. The exhaust aftertreatment assembly includes a housing and an exhaust aftertreatment carrier encapsulated within the housing. The exhaust assembly includes an exhaust housing and an exhaust pipe connected to the exhaust housing. The exhaust housing has a second space, and the exhaust pipe communicates with the second space. The first space and the second space are located at opposite ends of the exhaust aftertreatment assembly and are both connected to the exhaust 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 exhaust assembly. The middle portion of the first arc-shaped mounting portion protrudes towards the second arc-shaped mounting portion, and the middle portion of the second arc-shaped mounting portion protrudes towards the first arc-shaped mounting portion.

2. The exhaust gas aftertreatment device as described in 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 sound-absorbing cotton filled between the inner pipe and the outer pipe. The inner pipe is connected to the air outlet pipe, and the outer pipe is wrapped around the inner pipe. The inner pipe has several sound-absorbing holes penetrating its wall.

3. The exhaust gas aftertreatment device as described in claim 2, characterized in that: The exhaust gas aftertreatment device also includes a connecting piece, one end of which is welded and fixed to the outer pipe, and the other end of which is welded and fixed to the intake housing.

4. The exhaust gas aftertreatment device as described in 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 disposed in the first annular wall. The first end plate has a first protrusion formed by outward stamping. The back of the first protrusion has a first groove communicating with the first space.

5. The exhaust gas aftertreatment device as described in claim 4, characterized in that: The vent 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 disposed in the second annular wall. The second end plate has a second protrusion formed by outward stamping. The vent pipe is attached to the inner side of the second protrusion.

6. The exhaust gas aftertreatment device as described in 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 part protrudes from the first arc-shaped mounting part, and the first arc-shaped mounting part is integrally formed with the first fixing part; The second fixing part protrudes from the second arc-shaped mounting part, and the second arc-shaped mounting part is integrally formed with the second fixing part; The first fixing part is welded and fixed to the first mounting part, and the second fixing part is welded and fixed to the second mounting part. The first fixing part and the second fixing part are respectively located on both sides of the second raised part.

7. The exhaust gas aftertreatment device as described in claim 6, characterized in that: The second fixing part is welded and fixed to the air outlet pipe.

8. The exhaust gas aftertreatment device as described in 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 aftertreatment device as described in claim 5, characterized in that: The exhaust gas aftertreatment device includes a heat insulation shell, which includes a first heat insulation shell, wherein the first heat insulation shell at least partially wraps around the first annular wall, the shell and the second annular wall, and the first heat insulation shell is a two-half heat insulation shell.

10. The exhaust gas aftertreatment device as described in claim 9, characterized in that: The insulation shell includes a second insulation shell, which at least partially wraps around the pipe body extending from the second annular wall of the air outlet pipe. The second insulation shell is a two-part insulation shell.

11. The exhaust gas aftertreatment device as described in 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 has a protrusion protruding from the first insulation shell, a first support portion connected to one side of the protrusion, a second support portion connected to the other side of the protrusion, and a groove portion located between the first support portion and the second support portion. The first support portion has a first mounting hole, and the second support portion has a second mounting hole.

12. The exhaust gas aftertreatment device as described in 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 of the first annular wall and 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 inside the second spoiler.

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