Air outlet assembly and exhaust aftertreatment device

Abstract

The air outlet assembly comprises an air outlet shell and an air outlet pipe assembly connected with the air outlet shell, the air outlet shell comprises a side end wall, a surrounding wall connected with the side end wall, a partition plate fixed in the air outlet shell and a tone tuning pipe fixed to the partition plate, the surrounding wall is provided with an inner cavity, and the inner cavity is provided with an outer cavity. The partition plate is located in the inner cavity so as to divide the inner cavity into a first cavity located on one side of the partition plate and a second cavity located on the other side of the partition plate, and at least part of the tuning pipe protrudes into the second cavity. The utility model further discloses an exhaust aftertreatment device comprising the air outlet assembly. Compared with the prior art, the air outlet assembly and the exhaust aftertreatment device are beneficial to reducing low-frequency noise.

Description

Technical Field

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

[0002] Exhaust aftertreatment devices in related technologies typically include a housing, an intake pipe, and an exhaust pipe. In some cases, the exhaust aftertreatment device also includes an exhaust aftertreatment carrier encapsulated in the housing, which is one or more of a diesel oxidation catalyst carrier (DOC carrier), a diesel particulate filter carrier (DPF carrier), and a selective catalytic reduction carrier (SCR carrier).

[0003] Those skilled in the art will understand that the acoustic performance of the exhaust aftertreatment device is highly related to the volume of the exhaust chamber. As the acoustic requirements of the exhaust aftertreatment device continue to increase, related technologies typically improve acoustic performance by increasing the volume of the exhaust chamber.

[0004] However, increasing the volume of the exhaust chamber inevitably leads to an increase in the overall size of the exhaust aftertreatment device and a relatively complex structure. More importantly, in some application scenarios, when the size of the exhaust aftertreatment device is fixed, it is impossible to improve noise by increasing the volume of the exhaust chamber.

[0005] Therefore, how to reduce noise without increasing the size is a technical challenge faced by technicians in this field. Utility Model Content

[0006] The purpose of this invention is to provide an exhaust assembly with an improved structure and an exhaust aftertreatment device to reduce noise.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an exhaust assembly for use in an exhaust aftertreatment device, the exhaust assembly comprising an exhaust housing and an exhaust pipe assembly connected to the exhaust housing, the exhaust housing comprising a side end wall, a surrounding wall connected to the side end wall, a partition plate fixed inside the exhaust housing, and a tuning pipe fixed to the partition plate, the surrounding wall having an internal cavity, the partition plate being located in the internal cavity to divide the internal cavity into a first cavity located on one side of the partition plate and a second cavity located on the other side of the partition plate, the tuning pipe at least partially protruding into the second cavity.

[0008] As a further improvement of this utility model, the partition plate is welded and fixed to the inner wall surface of the side end wall and the inner wall surface of the surrounding wall.

[0009] As a further improved technical scheme of the utility model, the partition plate is arranged obliquely compared with the air outlet shell.

[0010] As a further improved technical scheme of the utility model, the partition plate is provided with a mounting through hole, and one end of the tone pipe is at least partially inserted into the mounting through hole and fixed with the partition plate.

[0011] As a further improved technical scheme of the utility model, the tone pipe is in L shape, and the other end of the tone pipe is an open end and is in a suspended state in the second cavity.

[0012] As a further improved technical scheme of the utility model, the second cavity is a tone cavity.

[0013] As a further improved technical scheme of the utility model, the air outlet pipe assembly comprises an air outlet pipe and a porous medium element in the air outlet pipe, the air outlet pipe is configured to allow exhaust gas to flow out of the exhaust gas aftertreatment device, and the porous medium element is configured to allow the exhaust gas to pass through the porous medium element to reduce the noise of the exhaust gas.

[0014] As a further improved technical scheme of the utility model, the porous medium element is steel wire wool.

[0015] As a further improved technical scheme of the utility model, the air outlet pipe comprises a first air outlet pipe part and a second air outlet pipe part, and the first air outlet pipe part and the second air outlet pipe part are an integral part or two separate parts.

[0016] The first air outlet pipe part and the second air outlet pipe part are connected, and the porous medium element is located in the first air outlet pipe part and / or the second air outlet pipe part.

[0017] The second air outlet pipe part comprises an open hole area, and the open hole area is provided with a plurality of sound holes penetrating the wall of the second air outlet pipe part.

[0018] The air outlet pipe assembly further comprises an outer shell wrapped on the open hole area and sound-absorbing cotton filled between the open hole area and the outer shell.

[0019] The porous medium element is located upstream and / or downstream of the open hole area in the flow direction of the exhaust gas.

[0020] The utility model further discloses an exhaust gas aftertreatment device, which comprises:

[0021] An air inlet assembly comprising an air inlet shell and an air inlet pipe fixed to the air inlet shell.

[0022] An exhaust gas aftertreatment assembly including a metal housing and an exhaust gas aftertreatment carrier encapsulated in the metal housing; and

[0023] An air outlet assembly as described above.

[0024] Compared with the prior art, the air outlet assembly and the exhaust gas aftertreatment device of the utility model include air outlet shell, the air outlet shell includes side end wall, with the side end wall is connected the encircle wall, is fixed in the partition board of the air outlet shell, and is fixed in the tuning pipe of the partition board, the encircle wall is equipped with internal cavity, the partition board is located in the internal cavity, to divide the internal cavity into the first cavity of one side of the partition board and the second cavity of the other side of the partition board, the tuning pipe at least partial protrudes into the second cavity.Such setting, the air outlet assembly and the exhaust gas aftertreatment device of the utility model are favorable to reduce low frequency noise. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the three-dimensional schematic view of the exhaust gas aftertreatment device of the utility model in the first embodiment, wherein the mounting bracket assembly is in the first position;

[0026] Figure 2 It is Figure 1 The partial three-dimensional exploded view of wherein the mounting bracket assembly is separated;

[0027] Figure 3 It is Figure 2 Further partial three-dimensional exploded view;

[0028] Figure 4 It is the three-dimensional schematic view of the exhaust gas aftertreatment device of the utility model in the second embodiment, wherein the mounting bracket assembly is in the second position;

[0029] Figure 5 It is Figure 4 Front view of wherein the mounting bracket assembly is separated;

[0030] Figure 6 It is Figure 4 The partial three-dimensional exploded view of wherein the mounting bracket assembly is separated;

[0031] Figure 7 It is Figure 6 Further partial three-dimensional exploded view;

[0032] Figure 8 It is the three-dimensional schematic view of the air outlet assembly of the utility model;

[0033] Figure 9 It is Figure 8 Left view of wherein the mounting bracket assembly is separated;

[0034] Figure 10 It is along Figure 9 Schematic diagram of the cross section of line AA in the middle;

[0035] Figure 11 This is a three-dimensional schematic diagram of the end cap of this utility model;

[0036] Figure 12 yes Figure 11 Top view;

[0037] Figure 13 This is a three-dimensional schematic diagram of the air outlet component of this utility model in the third embodiment;

[0038] Figure 14 It is along Figure 13 A cross-sectional view of the BB line. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] First implementation method:

[0042] Please refer to Figures 1 to 3 As shown, this utility model discloses an exhaust aftertreatment device, which includes an exhaust assembly 10, an exhaust aftertreatment assembly 20 connected to the exhaust assembly 10, an intake assembly 30 connected to the exhaust aftertreatment assembly 20, and a mounting bracket assembly 40 fixed to the exhaust aftertreatment assembly 20. The exhaust assembly 10 includes an exhaust housing 11 and an exhaust pipe assembly 13 connected to the exhaust housing 11.

[0043] The tail gas aftertreatment assembly 20 comprises a metal shell 21 and a tail gas aftertreatment carrier 22 encapsulated in the metal shell 21, the tail gas aftertreatment carrier 22 being at least one of a diesel oxidation catalyst carrier, a diesel particulate filter carrier and a selective catalytic reduction carrier. The metal shell 21 is connected with the gas outlet shell 11.

[0044] The air inlet assembly 30 comprises an air inlet shell 31 and an air inlet pipe 32 fixed to the air inlet shell 31, wherein the air inlet shell 31 is connected with the metal shell 21. Preferably, the air inlet shell 31 of the air inlet assembly 30 can realize part sharing with the gas outlet shell 11.

[0045] The mounting bracket assembly 40 comprises a plurality of support frames 41 welded to the metal shell 21 and mounting brackets 42 assembled to the support frames 41. Please refer to Figure 1 and Figure 4 It is shown that the mounting bracket assembly 40 can be mounted at different positions along the circumferential wall surface of the metal shell 21.

[0046] Please refer to Figures 8 to 12 It is shown that in the embodiment illustrated in the utility model, the gas outlet shell 11 comprises a side end wall 111 and a surrounding wall 112 integrally extended from the side end wall 111 along the axial direction O-O. The surrounding wall 112 is provided with an internal cavity 1120. The side end wall 111 comprises a main body part 1111 and a protruding part 1112 stamped from the main body part 1111 to a side away from the internal cavity 1120. The protruding part 1112 extends along the radial direction R-R, the protruding part 1112 forms a first notch 1113, the surrounding wall 112 is provided with a second notch 1123, and the first notch 1113 and the second notch 1123 jointly form an opening hole 113 for inserting the gas outlet pipe assembly 13. In the embodiment illustrated in the utility model, the opening hole 113 is a circular hole, the first notch 1113 corresponds to a minor arc, and the second notch 1123 corresponds to a major arc. The opening hole 113 is completely formed on the gas outlet shell 11.

[0047] In the embodiment illustrated in the utility model, the gas outlet assembly 10 comprises a flange part 114 protruding from the surrounding wall 112 along the radial direction R-R, the flange part 114 corresponds to the second notch 1123. The gas outlet pipe assembly 13 is welded to the flange part 114.

[0048] Each support frame 41 comprises a first side wall 411 welded to the metal shell 21, a second side wall 412 welded to the metal shell 21, and a mounting wall 413 connecting the first side wall 411 and the second side wall 412. The mounting wall 413 is spaced apart from the metal shell 21, and the mounting bracket 42 is mounted and fixed to the mounting wall 413 by a first fastener 51.

[0049] In the embodiment shown in the utility model, the first fastener 51 comprises a first bolt 511 and a first nut 512 matched with the first bolt 511, the first nut 512 is located between the mounting wall 413 and the metal shell 21, and the first nut 512 is fixed to the mounting wall 413 or detachably assembled with the mounting wall 413.

[0050] In the embodiment shown in the utility model, the mounting bracket 42 is two and arranged side by side, and the mounting bracket assembly 40 further comprises a connecting plate 53 for fixing the two mounting brackets 42 together by a plurality of second fasteners 52.

[0051] The connecting plate 53 comprises a first connecting portion 531 and a second connecting portion 532, wherein the first connecting portion 531 is fixedly connected with one mounting bracket 42 by one second fastener 52, and the second connecting portion 532 is fixedly connected with the other mounting bracket 42 by the other second fastener 52.

[0052] Each second fastener 52 comprises a second bolt 521 and a second nut 522 matched with the second bolt 521, the second nut 522 is located between the connecting plate 53 and the metal shell 21, and the second nut 522 is fixed to the connecting plate 53 or detachably assembled with the connecting plate 53.

[0053] Please combine Figure 10As shown in the first embodiment of the utility model shown in the figure, the air outlet pipe assembly 13 includes an air outlet pipe 131 for discharging exhaust gas from the exhaust gas aftertreatment device. The air outlet pipe 131 extends out of the air outlet shell 11. In the first embodiment of the utility model shown in the figure, the air outlet pipe 131 includes a first air outlet pipe portion 1311 and a second air outlet pipe portion 1312, and the first air outlet pipe portion 1311 and the second air outlet pipe portion 1312 are fixed together (for example, welded together). The air outlet pipe 131 is provided with a plurality of sound attenuation holes 1310 penetrating through the wall portion thereof. In the first embodiment of the utility model shown in the figure, the sound attenuation holes 1310 are provided on the second air outlet pipe portion 1312. Of course, in other embodiments of the utility model, the air outlet pipe 131 can also be a one-piece pipe body. In the first embodiment of the utility model shown in the figure, the air outlet pipe assembly 13 further includes an outer shell 132 corresponding to the opening region 130 of the air outlet pipe 131 and sound attenuation cotton 133 filled between the air outlet pipe 131 and the outer shell 132. The air outlet pipe 131 is fixed to the air outlet shell 11, and the outer shell 132 wraps the opening region 130 of the air outlet pipe 131.

[0054] Those skilled in the art can understand that the one-piece integral pipe body of the air outlet pipe 131 or the split pipe body including a plurality of pieces connected together is suitable for all embodiments of the utility model.

[0055] The exhaust gas aftertreatment device further includes a connecting piece 6, one end of the connecting piece 6 is welded and fixed to the outer shell 132, and the other end of the connecting piece 6 is welded and fixed to the metal shell 21 and / or the air inlet shell 31.

[0056] Each mounting bracket 42 is L-shaped, including a transverse rod 421 and a longitudinal rod 422 perpendicular to the transverse rod 421.

[0057] The mounting bracket assembly 40 can be mounted at different positions along the peripheral wall surface of the metal shell 21 to improve the mounting flexibility of the mounting bracket assembly 40.

[0058] In the embodiments of the utility model shown in the figure, please combine Figure 1 As shown, the positions include a first position, at which the transverse rod 421 is at least partially located in the gap between the metal shell 21 and the outer shell 132, and the longitudinal rod 422 is located outside the air inlet assembly 30.

[0059] In the embodiments of the utility model shown in the figure, the mounting bracket 42 is a section bar with a mouth-shaped cross section, avoiding mold opening and thus saving costs.

[0060] The air outlet shell 11 includes a side end wall 111 and a surrounding wall 112 integrally extended from the side end wall 111 along an axial direction O-O, the surrounding wall 112 is provided with an internal cavity 1120, the side end wall 111 includes a main body part 1111 and a protruding part 1112 stamped from the main body part 1111 to a side away from the internal cavity 1120, the protruding part 1112 extends along a radial direction R-R, the protruding part 1112 forms a first notch 1113, the surrounding wall 112 is provided with a second notch 1123, and the first notch 1113 and the second notch 1123 jointly form an opening hole 113 for inserting the air outlet pipe assembly 13. In this way, by arranging the opening hole 113 on the integrally formed air outlet shell 11, the structure is simplified, and the reliability is improved; challenges brought by the size precision and structural reliability of the opening hole when the opening hole 113 is formed by welding two components are avoided. For example, the influence of welding deformation on the opening hole 113 is avoided.

[0061] Second embodiment:

[0062] The exhaust gas aftertreatment device in the second embodiment shown in the utility model is similar in structure to the exhaust gas aftertreatment device in the first embodiment shown in the utility model, and the main difference between the two is that, in the second embodiment shown in the utility model, please refer to Figures 4 to 7 the position includes a second position, at which the transverse rod 421 is located on the side of the metal shell 21 opposite to the outer shell 132, and the longitudinal rod 422 is located outside the air inlet assembly 30.

[0063] Please refer to Figures 1 to 7 It can be understood by those skilled in the art that the mounting bracket assembly 40 can be installed at different positions along the circumferential wall surface of the metal shell 21, improving the installation flexibility of the mounting bracket assembly 40, and no longer needing to design different mounting bracket assemblies 40 for different installation angles, thereby saving costs.

[0064] Third embodiment:

[0065] The exhaust gas aftertreatment device in the third embodiment shown in the utility model is similar in structure to the exhaust gas aftertreatment devices in the first embodiment and the second embodiment shown in the utility model, and the main difference between the two is the structure of the air outlet assembly 10, wherein in the third embodiment shown in the utility model, please refer to Figure 13 and Figure 14As shown, the air outlet assembly 10 comprises an air outlet shell 11 and an air outlet pipe assembly 13 connected to the air outlet shell 11. The air outlet pipe assembly 13 comprises an air outlet pipe 131 for discharging exhaust gas from the exhaust gas aftertreatment device. The air outlet pipe 131 extends out of the air outlet shell 11. In the third embodiment shown in the drawings of the present application, the air outlet pipe 131 comprises a first air outlet pipe portion 1311, a second air outlet pipe portion 1312 and a third air outlet pipe portion 1313, the first air outlet pipe portion 1311 and the second air outlet pipe portion 1312 are fixed together (for example, welded together). The second air outlet pipe portion 1312 and the third air outlet pipe portion 1313 are fixed together (for example, welded together). At least one of the first air outlet pipe portion 1311 and the second air outlet pipe portion 1312 is a bent pipe. In the embodiment shown in the drawings of the present application, the first air outlet pipe portion 1311 is a bent pipe. The air outlet pipe 131 is provided with a plurality of sound attenuation holes 1310 penetrating through the wall thereof. In the third embodiment shown in the drawings of the present application, the sound attenuation holes 1310 are provided on the second air outlet pipe portion 1312. Of course, in other embodiments of the present application, the air outlet pipe 131 can also be an integral pipe body. In other words, the first air outlet pipe portion 1311 and the second air outlet pipe portion 1312 are one part in an integral type or two parts in a split type; the second air outlet pipe portion 1312 and the third air outlet pipe portion 1313 are one part in an integral type or two parts in a split type. In the third embodiment shown in the drawings of the present application, the air outlet pipe assembly 13 further comprises an outer shell 132 corresponding to the opening region 130 of the air outlet pipe 131, sound attenuation cotton 133 filled between the air outlet pipe 131 and the outer shell 132, and a porous medium element 134 fixed in the air outlet pipe 131. In the embodiment shown in the drawings of the present application, the porous medium element 134 is fixed to the third air outlet pipe portion 1313 to reduce the installation difficulty. In the embodiment shown in the drawings of the present application, the porous medium element 134 is welded to the inner wall of the air outlet pipe 131. The air outlet pipe 131 is fixed to the air outlet shell 11, and the outer shell 132 is wrapped on the opening region 130 of the air outlet pipe 131.

[0066] The porous medium element 134 can be a steel wool, a mesh steel wire, or a ceramic porous medium element, etc. The 3D of the porous medium element 134 (e.g. steel wool) is a porous structure or a multi-void structure. The porous medium element 134 is arranged in the air outlet pipe 131 to enable the air flow about to flow out of the exhaust gas aftertreatment device through the air outlet pipe 131 to be reduced in low frequency noise (e.g. 20Hz-500Hz) and high frequency noise (e.g. >500Hz) under the action of the porous medium element 134, thereby significantly improving the acoustic performance of the exhaust gas aftertreatment device without increasing the air outlet cavity of the exhaust gas aftertreatment device.

[0067] Please refer to Figure 13 and Figure 14 In the embodiment shown in the drawings, the air outlet assembly 10 further comprises a partition plate 15 fixed in the air outlet shell 11 and a tuning pipe 16 fixed on the partition plate 15. Specifically, the partition plate 15 is fixed by welding on the inner wall surface of the side end wall 111 and the inner wall surface of the surrounding wall 112. The partition plate 15 is located in the internal cavity 1120 to divide the internal cavity 1120 into a first cavity 1120a located on one side of the partition plate 15 and a second cavity 1120b located on the other side of the partition plate 15, wherein the first cavity 1120a is in communication with the exhaust gas aftertreatment assembly 20, and the tuning pipe 16 at least partially protrudes into the second cavity 1120b.

[0068] Specifically, the partition plate 15 is fixed by welding on the air outlet shell 11. The partition plate 15 is arranged obliquely compared with the air outlet shell 11. The partition plate 15 is provided with a mounting through hole 151. The tuning pipe 16 is generally L-shaped, one end of the tuning pipe 16 at least partially inserts into the mounting through hole 151 and is fixed with the partition plate 15. The other end of the tuning pipe 16 is an open end and is located in the second cavity 1120b in a suspended manner. By arranging the tuning pipe 16, the tuning cavity is increased in the limited space on the air outlet shell 11, and the utility model is beneficial to reduce the low frequency noise at certain frequencies (e.g. engine idle speed).

[0069] The above embodiments are only used to illustrate the utility model and not to limit the technical solutions described in the utility model. The understanding of the specification should be based on the technical personnel in the technical field. Although the utility model has been described in detail with reference to the above embodiments, the ordinary technical personnel in the field should understand that the technical personnel in the field can still modify or equivalently replace the utility model, and all technical solutions and improvements which do not deviate from the spirit and scope of the utility model should be covered in the claim range of the utility model.

Claims

1. An air outlet assembly for use on an exhaust gas aftertreatment device, characterized by, The air outlet assembly comprises an air outlet shell and an air outlet pipe assembly connected to the air outlet shell, the air outlet shell comprises a side end wall, a surrounding wall connected to the side end wall, a partition plate fixed in the air outlet shell, and a tuning pipe fixed to the partition plate, the surrounding wall is provided with an internal cavity, the partition plate is located in the internal cavity to divide the internal cavity into a first cavity on one side of the partition plate and a second cavity on the other side of the partition plate, and the tuning pipe at least partially protrudes into the second cavity.

2. The air outlet assembly of claim 1, wherein: The partition plate is welded to the inner wall surface of the side end wall and the inner wall surface of the surrounding wall.

3. The air outlet assembly of claim 1, wherein: The partition plate is inclined compared to the air outlet shell.

4. The air outlet assembly of claim 1, wherein: The partition plate is provided with a mounting through hole, one end of the tuning pipe is at least partially inserted into the mounting through hole and fixed to the partition plate.

5. The air outlet assembly of claim 4, wherein: The tuning pipe is in an L shape, the other end of the tuning pipe is an open end and is in a suspended state in the second cavity.

6. The air outlet assembly of claim 1, wherein: The second cavity is a tuning cavity.

7. The air outlet assembly of claim 1, wherein: The air outlet pipe assembly comprises an air outlet pipe and a porous medium element in the air outlet pipe, the air outlet pipe is configured to allow exhaust gas to flow out of the exhaust gas aftertreatment device, and the porous medium element is configured to allow the exhaust gas to pass through the porous medium element to reduce the noise of the exhaust gas.

8. The air outlet assembly of claim 7, wherein: The porous medium element is steel wool.

9. The air outlet assembly of claim 7, wherein: The air outlet pipe comprises a first air outlet pipe part and a second air outlet pipe part, the first air outlet pipe part and the second air outlet pipe part are one part or two parts; The first air outlet pipe part and the second air outlet pipe part are connected, and the porous medium element is located in the first air outlet pipe part and / or the second air outlet pipe part; The second air outlet pipe part comprises an open hole area, the open hole area is provided with a plurality of sound attenuation holes penetrating through the wall of the second air outlet pipe part; The air outlet pipe assembly further comprises an outer shell wrapped on the open hole area and sound attenuation cotton filled between the open hole area and the outer shell; The porous medium element is located upstream and / or downstream of the open hole area in the flow direction of the exhaust gas.

10. An exhaust gas aftertreatment device, characterized in that Comprise: An air inlet assembly comprising an air inlet shell and an air inlet pipe fixed to the air inlet shell; An exhaust gas aftertreatment assembly comprising a metal shell and an exhaust gas aftertreatment carrier packaged in the metal shell; And An air outlet assembly as claimed in any one of claims 1 to 9.

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