Tail gas after-treatment packaging device and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and discloses a tail gas aftertreatment packaging device and a vehicle. According to the tail gas aftertreatment packaging device, a shell structure comprises a first cover body and a first end plate. The first cover body covers the first end plate, and a first flowing cavity is formed between the first cover body and the first end plate. The front-stage SCR, the urea mixer and the rear-stage SCR are all fixedly arranged on the first end plate. The front-stage SCR, the urea mixer, the first flowing cavity and the rear-stage SCR are sequentially communicated. In the first direction, the rear-stage SCR is located above the front-stage SCR. The first end of the air inlet pipe extends out of the top end, in the first direction, of the first cover body, and the second end of the air inlet pipe is located in the first flowing cavity and communicates with the input end of the preceding-stage SCR. A first urea connector partially extending into the air inlet pipe is arranged at the top end, in the first direction, of the first cover body. A second urea connector is arranged at the input end of the urea mixer. Compared with the prior art, the tail gas treatment effect of the front-stage assembly can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an exhaust gas post-treatment packaging device and a vehicle. Background Art

[0002] With the introduction of the National VI emission standard, higher emission requirements have been imposed on exhaust gas emissions. Currently, the mainstream method for exhaust gas emission treatment is as follows: a front-stage selective catalytic reduction unit (Selective Catalytic Reduction; SCR), an oxidation catalytic unit (Diesel Oxidation Catalyst; DOC), a particulate trap unit (Diesel Particulate Filter; DPF), a urea mixing device, a rear-stage selective catalytic reduction unit, and an ammonia oxidation catalytic unit (Ammonia Slip Catalyst; ASC) are connected in series.

[0003] In order to ensure the catalytic effects of the front-stage selective catalytic reduction unit and the rear-stage selective catalytic reduction unit, an exhaust gas post-treatment device in the prior art is provided with independent urea nozzles at the input ends of the front-stage selective catalytic reduction unit and the rear-stage selective catalytic reduction unit respectively. However, the input end of the front-stage selective catalytic reduction unit is directly connected to the urea nozzle, resulting in poor mixing effect of the exhaust gas and urea, thereby reducing the effect of the front-stage selective catalytic reduction unit in post-treating the exhaust gas. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an exhaust gas post-treatment packaging device and a vehicle to solve the above problems existing in the exhaust gas post-treatment device in the prior art.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An exhaust gas post-treatment packaging device, comprising a post-treatment assembly, the post-treatment assembly includes a front-stage assembly, a urea mixer, and a rear-stage assembly, the front-stage assembly includes a front-stage SCR, the rear-stage assembly includes a rear-stage SCR, and the exhaust gas post-treatment packaging device further includes:

[0007] A housing structure, the housing structure includes a first cover and a first end plate, the first cover covers the first end plate and forms a first flow cavity between the first cover and the first end plate; the front-stage SCR, the urea mixer, and the rear-stage SCR are all fixedly arranged on the first end plate; the front-stage SCR, the urea mixer, the first flow cavity, and the rear-stage SCR are connected in sequence; along a first direction, the rear-stage SCR is located above the front-stage SCR;

[0008] An intake pipe, the first end of the intake pipe extends out of the top end of the first housing along the first direction, and the second end of the intake pipe is located in the first flow chamber and communicates with the input end of the pre-stage SCR;

[0009] At the top end of the first housing along the first direction, there is a first urea connector partially extending into the intake pipe; the input end of the urea mixer is provided with a second urea connector.

[0010] As a preferred solution of the above exhaust gas aftertreatment packaging device, the intake pipe includes a first pipe section, a second pipe section, and a third pipe section that are connected in sequence; the first pipe section partially extends out of the top end of the first housing along the first direction; the first urea connector partially extends into the second pipe section; the output end of the third pipe section communicates with the input end of the pre-stage SCR;

[0011] A mixing structure is fixedly arranged in the second pipe section, and the mixing structure is used to mix the urea sprayed by the first urea connector and the fluid flowing from the first pipe section to the second pipe section, and convey the mixed fluid to the third pipe section.

[0012] As a preferred solution of the above exhaust gas aftertreatment packaging device, the mixing structure includes a mixing pipe, the mixing pipe is provided with a plurality of turned-out guide vanes, the plurality of guide vanes are spaced along the circumferential direction of the mixing pipe, and a guide through hole is formed at each guide vane; the guide through hole communicates the inside and the outside of the mixing pipe;

[0013] The direction of the fluid flowing out of the first pipe section and the direction of the fluid flowing out of the mixing pipe are distributed at an angle; at least part of the fluid flowing into the second pipe section can flow through the guide through hole and the inside of the mixing pipe in sequence and flow to the third pipe section; the part of the first urea connector extending into the second pipe section is located directly above the mixing pipe.

[0014] As a preferred solution of the above exhaust gas aftertreatment packaging device, the mixing pipe is a conical pipe, and the end of the mixing pipe close to the first urea connector along the axial direction is the small end of the mixing pipe.

[0015] As a preferred solution of the above exhaust gas aftertreatment packaging device, along the second direction, among the plurality of guide vanes, the one closest to the output end of the first pipe section is the proximal reference guide vane, and the one farthest from the output end of the first pipe section is the distal reference guide vane; the plurality of guide vanes include two guide vane groups, and the two guide vane groups are located on both sides of the proximal reference guide vane and the distal reference guide vane along the third direction respectively; the second direction and the third direction are perpendicular to each other and both are perpendicular to the first direction;

[0016] From the proximal reference flow guiding piece to the distal reference flow guiding piece, the folding angles of the multiple flow guiding pieces of each flow guiding piece group folding outwards gradually increase.

[0017] As a preferred solution of the above exhaust gas post-treatment encapsulation device, the flow guiding pieces are spirally wound around the outer periphery of the mixing pipe.

[0018] As a preferred solution of the above exhaust gas post-treatment encapsulation device, the mixing structure further includes a baffle. The outer peripheral wall of the baffle is hermetically connected to the inner peripheral wall of the second pipe section along the circumferential direction, the inner peripheral wall of the baffle is hermetically connected to the outer periphery of the mixing pipe along the circumferential direction, and the baffle is located below the multiple flow guiding pieces along the first direction.

[0019] As a preferred solution of the above exhaust gas post-treatment encapsulation device, the baffle is further provided with a through hole, and the through hole communicates the second pipe section and the third pipe section.

[0020] As a preferred solution of the above exhaust gas post-treatment encapsulation device, the connection between the output end of the second pipe section and the third pipe section is located on the outer periphery of the third pipe section;

[0021] Along the first direction, the output end of the second pipe section is located above the central axis of the third pipe section; along the second direction, at least part of the output end of the second pipe section is located on one side of the central axis of the third pipe section, and at least part of the first pipe section is located on the other side of the central axis of the third pipe section; the central axis of the third pipe section is parallel to the third direction; the second direction is perpendicular to the third direction and both are perpendicular to the first direction.

[0022] As a preferred solution of the above exhaust gas post-treatment encapsulation device, the output end of the third pipe section is located on the first end face of the third pipe section along the axial direction; the second end face of the third pipe section along the axial direction is distributed at an acute angle with the first end face, and the distance between the second end face and the first end face gradually decreases from top to bottom along the first direction.

[0023] As a preferred solution of the above exhaust gas post-treatment encapsulation device, the acute angle range between the first end face and the second end face is: 20° to 30°.

[0024] A vehicle, including the above exhaust gas post-treatment encapsulation device.

[0025] The beneficial effects of the present utility model:

[0026] The present utility model provides an exhaust gas post-treatment encapsulation device and a vehicle. The exhaust gas post-treatment encapsulation device includes a post-treatment assembly, a housing structure, and an intake pipe. The post-treatment assembly includes a pre-stage assembly, a urea mixer, and a post-stage assembly. The pre-stage assembly includes a pre-stage SCR. The post-stage assembly includes a post-stage SCR. The housing structure includes a first cover and a first end plate. The first cover covers the first end plate and forms a first flow cavity between the first cover and the first end plate. The pre-stage SCR, the urea mixer, and the post-stage SCR are all fixedly arranged on the first end plate. The pre-stage SCR, the urea mixer, the first flow cavity, and the post-stage SCR are connected in sequence. Along a first direction, the post-stage SCR is located above the pre-stage SCR. The first end of the intake pipe extends out of the top end of the first cover along the first direction, and the second end of the intake pipe is located in the first flow cavity and is connected to the input end of the pre-stage SCR. The top end of the first cover along the first direction is provided with a first urea connector partially extending into the intake pipe. The input end of the urea mixer is provided with a second urea connector.

[0027] When the exhaust gas post-treatment encapsulation device performs exhaust gas post-treatment work, the exhaust gas is introduced into the intake pipe through the first end of the intake pipe, and the urea sprayed by the first urea connector also enters the intake pipe from the first end of the intake pipe. The exhaust gas and the urea are mixed in the intake pipe to form a mixed fluid mass and flow to the pre-stage SCR, and then flow to the urea mixer. When the mixed fluid mass flows to the input end of the urea mixer, the second urea connector sprays urea. The sprayed urea and the mixed fluid mass are mixed and flow to the post-stage SCR, and finally flow out from the output end of the post-stage assembly. So as to effectively perform post-treatment on the exhaust gas. Among them, by setting that the first end of the intake pipe extends out of the top end of the first cover along the first direction, the second end of the intake pipe is located in the first flow cavity and is connected to the input end of the pre-stage SCR, and setting that along the first direction, the post-stage SCR is located above the pre-stage SCR. It makes the span of the first end and the second end of the intake pipe along the first direction large, the extension length of the intake pipe is long, and the flow mixing path length of the exhaust gas and the urea sprayed by the first urea connector in the intake pipe is long. Thus, the exhaust gas entering the intake pipe and the urea sprayed by the first urea connector can be well mixed and then flow to the pre-stage SCR. Therefore, compared with the prior art, the effect of the pre-stage assembly in treating exhaust gas can be effectively improved. Description of the Drawings

[0028] Figure 1 is the assembly drawing of the exhaust gas post-treatment encapsulation device provided by a specific embodiment of the present utility model;

[0029] Figure 2 is the exploded view of the exhaust gas post-treatment encapsulation device provided by a specific embodiment of the present utility model along a first perspective;

[0030] Figure 3 is the exploded view of the exhaust gas post-treatment encapsulation device provided by a specific embodiment of the present utility model along a second perspective;

[0031] Figure 4 It is an assembly drawing of a mixer and an intake pipe provided by a specific embodiment of the present utility model;

[0032] Figure 5 It is a cross-sectional view of the intake pipe provided by a specific embodiment of the present utility model;

[0033] Figure 6 It is a schematic structural diagram of a mixing pipe along a third perspective provided by a specific embodiment of the present utility model;

[0034] Figure 7 It is a schematic structural diagram of a mixing pipe along a fourth perspective provided by a specific embodiment of the present utility model;

[0035] Figure 8 It is a schematic structural diagram of a baffle provided by a specific embodiment of the present utility model.

[0036] In the figure:

[0037] 1. Front-stage assembly; 11. Front-stage SCR; 12. Front-stage DOC; 13. Front-stage DPF;

[0038] 2. Rear-stage assembly; 21. Rear-stage SCR; 22. Rear-stage ASC;

[0039] 3. Urea mixer;

[0040] 41. First housing; 411. First through-hole; 412. Third through-hole; 42. First end plate; 43. First flow cavity; 44. Second end plate; 45. Second housing; 46. Third housing; 47. Output pipe;

[0041] 5. Intake pipe; 51. First pipe segment; 52. Second pipe segment; 521. Second through-hole; 53. Third pipe segment; 531. First end face; 532. Second end face;

[0042] 6. Mixing structure; 61. Mixing pipe; 611. Deflector; 612. Guide through-hole; 62. Baffle; 621. Through-hole. Detailed implementation manners

[0043] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] Figures 1 to 5 The ab direction in is the first direction. Figure 1 , Figure 4 and Figure 5 The cd direction in is the second direction. Figures 1 to 3 The ef direction is the third direction.

[0048] The utility model provides an exhaust gas post-processing packaging device. Figures 1 to 5As shown in the figure, the exhaust gas post-treatment encapsulation device includes a post-treatment component, a housing structure, and an intake pipe 5. The post-treatment component includes a pre-stage component 1, a urea mixer 3, and a post-stage component 2. The pre-stage component 1 includes a pre-stage SCR 11. The post-stage component 2 includes a post-stage SCR 21. The housing structure includes a first cover 41 and a first end plate 42. The first cover 41 covers the first end plate 42 and forms a first flow chamber 43 between the first cover 41 and the first end plate 42. The pre-stage SCR 11, the urea mixer 3, and the post-stage SCR 21 are all fixedly arranged on the first end plate 42. The pre-stage SCR 11, the urea mixer 3, the first flow chamber 43, and the post-stage SCR 21 are connected in sequence. Along the first direction, the post-stage SCR 21 is located above the pre-stage SCR 11. The first end of the intake pipe 5 extends out of the top end of the first cover 41 along the first direction, and the second end of the intake pipe 5 is located in the first flow chamber 43 and is connected to the input end of the pre-stage SCR 11. A first urea connector that partially extends into the intake pipe 5 is provided at the top end of the first cover 41 along the first direction. A second urea connector is provided at the input end of the urea mixer 3.

[0049] When the exhaust gas post-treatment encapsulation device performs exhaust gas post-treatment work, the exhaust gas is introduced into the intake pipe 5 through the first end of the intake pipe 5, and the urea sprayed by the first urea connector also enters the intake pipe 5 from the first end of the intake pipe 5. The exhaust gas and the urea are mixed in the intake pipe 5 to form a mixed fluid and flow to the pre-stage SCR 11, and then flow to the urea mixer 3. When the mixed fluid flows to the input end of the urea mixer 3, the second urea connector sprays urea. The sprayed urea and the mixed fluid are mixed and flow to the post-stage SCR 21, and finally flow out from the output end of the post-stage component 2. To achieve effective post-treatment of the exhaust gas. Among them, by setting the first end of the intake pipe 5 to extend out of the top end of the first cover 41 along the first direction, the second end of the intake pipe 5 is located in the first flow chamber 43 and is connected to the input end of the pre-stage SCR 11, and setting the post-stage SCR 21 to be located above the pre-stage SCR 11 along the first direction. The span of the first end and the second end of the intake pipe 5 along the first direction is large, the extension length of the intake pipe 5 is long, and the flow mixing path length of the exhaust gas and the urea sprayed by the first urea connector in the intake pipe 5 is long. Thus, the exhaust gas entering the intake pipe 5 and the urea sprayed by the first urea connector can be well mixed before flowing to the pre-stage SCR 11. Thus, compared with the prior art, the effect of the pre-stage component 1 in treating exhaust gas can be effectively improved.

[0050] Among them, as Figures 1 to 5As shown, the intake pipe 5 includes a first pipe section 51, a second pipe section 52, and a third pipe section 53 that are connected in sequence. A part of the first pipe section 51 extends out of the top end of the first housing 41 along the first direction. The first urea connector partially extends into the second pipe section 52. The output end of the third pipe section 53 is connected to the input end of the pre-stage SCR 11. A mixing structure 6 is fixedly arranged in the second pipe section 52. The mixing structure 6 is used to mix the urea sprayed by the first urea connector and the fluid flowing from the first pipe section 51 to the second pipe section 52, and convey the mixed fluid to the third pipe section 53. With such an arrangement, the mixing effect of the exhaust gas entering the intake pipe 5 and the urea sprayed by the first urea connector can be further improved; secondly, since the mixing structure 6 is located in the second pipe section 52, the integration degree of the exhaust gas post-treatment encapsulation device can be effectively improved. Specifically, Figure 5 The dashed line in

[0051] Optionally, as Figures 4 to 7 shown, the mixing structure 6 includes a mixing pipe 61. The mixing pipe 61 is provided with a plurality of turned-out guide vanes 611. The plurality of guide vanes 611 are circumferentially spaced apart along the mixing pipe 61, and a guide through hole 612 is formed at each guide vane 611. The guide through hole 612 communicates the inside and the outside of the mixing pipe 61. The direction of the fluid flowing out of the first pipe section 51 and the direction of the fluid flowing out of the mixing pipe 61 are distributed at an angle. At least part of the fluid flowing into the second pipe section 52 can flow through the guide through hole 612 and the inside of the mixing pipe 61 in sequence and flow towards the third pipe section 53. The part of the first urea connector extending into the second pipe section 52 is located directly above the mixing pipe 61.

[0052] It can be understood that, as Figure 4 shown, the outer circumferences of the plurality of guide vanes 611 are spaced apart from the inner circumferential wall of the second pipe section 52.

[0053] As Figure 4 shown, when the exhaust gas flows from the first pipe section 51 into the second pipe section 52, the exhaust gas is divided into multiple strands under the guiding action of each guide vane 611 and enters the inside of the mixing pipe 61 through the respective guide through holes 612. The part of the first urea connector extending into the second pipe section 52 is located directly above the mixing pipe 61, and the first urea connector sprays urea into the inside of the mixing pipe 61 along the first direction. The multiple strands of exhaust gas wrap around the urea sprayed by the first urea connector along the circumference of the mixing pipe 61 and mix with the urea sprayed by the first urea connector. Thus, the mixing effect of the exhaust gas entering the intake pipe 5 and the urea sprayed by the first urea connector can be further improved.

[0054] Preferably, as Figure 4As shown, the mixing pipe 61 is located at the top of the second pipe section 52 along the first direction. Thus, after the exhaust gas and the urea injected by the first urea connector are mixed, they can still flow in the second pipe section 52 for a certain period of time for mixing, so as to further improve the mixing effect of the exhaust gas entering the intake pipe 5 and the urea injected by the first urea connector.

[0055] Preferably, as Figure 4 , Figure 6 and Figure 7 shown, the mixing pipe 61 is a conical pipe, and the end of the mixing pipe 61 along the axial direction close to the first urea connector is the small end of the mixing pipe 61. It can be understood that the end of the mixing pipe 61 along the axial direction away from the first urea connector is the large end of the mixing pipe 61. That is, the large end of the mixing pipe 61 is close to the third pipe section 53. Thus, the mixing effect of the exhaust gas entering the intake pipe 5 and the urea injected by the first urea connector can be further improved; secondly, it is also convenient for the mixed fluid to flow out of the mixing pipe 61 quickly.

[0056] Preferably, in this embodiment, as Figure 4 shown, the axial direction of the mixing pipe 61 is parallel to the first direction.

[0057] Preferably, in this embodiment, as Figure 5 shown, the included angle between the direction of the fluid flowing out of the first pipe section 51 and the direction of the fluid flowing out of the mixing pipe 61 is α. α is an obtuse angle. In this way, it is also convenient for the mixed fluid to flow out of the mixing pipe 61 quickly.

[0058] Preferably, in this embodiment, as Figures 4 to 5 shown, the second pipe section 52 is also a conical pipe. The first urea connector partially extends into the small end of the second pipe section 52. In this way, it is also convenient for the mixed fluid to flow out of the mixing pipe 61 quickly.

[0059] Preferably, as Figure 4 shown, along the second direction, the one of the plurality of guide vanes 611 closest to the output end of the first pipe section 51 is the proximal reference guide vane. The one of the plurality of guide vanes 611 farthest from the output end of the first pipe section 51 is the distal reference guide vane. The plurality of guide vanes 611 includes two guide vane groups, and the two guide vane groups are respectively located on both sides of the proximal reference guide vane and the distal reference guide vane along the third direction. The second direction is perpendicular to the third direction and both are perpendicular to the first direction. From the proximal reference guide vane to the distal reference guide vane, the folding angles of the plurality of guide vanes 611 in each guide vane group gradually increase when folded outwards.

[0060] It can be understood that, as Figure 4As shown, along the second direction, the closer the vent hole 612 is to the output end of the first pipe section 51, the easier it is for the exhaust gas to enter. Along the second direction, the farther the vent hole 612 is from the output end of the first pipe section 51, the less likely the exhaust gas is to enter. Therefore, it is arranged that from the proximal reference deflector to the distal reference deflector, the folding angles of the multiple deflectors 611 of each deflector group fold outwards gradually increase. So that the intake air flow of each vent hole 612 is roughly the same. Thus, the mixing effect of the exhaust gas entering the intake pipe 5 and the urea injected by the first urea joint can be further improved.

[0061] Preferably, in this embodiment, as Figures 1 to 3 shown, the third direction is perpendicular to the plate surface of the first end plate 42 close to the first housing 41.

[0062] Preferably, the deflector 611 is spirally wound around the outer periphery of the mixing pipe 61. It can be understood that the deflector 611 can not only guide the exhaust gas into the interior of the mixing pipe 61. It can also make the exhaust gas entering the interior of the mixing pipe 61 through the vent hole 612 be distributed roughly along the axial and circumferential directions of the mixing pipe 61. Thus, the mixing effect of the exhaust gas entering the intake pipe 5 and the urea injected by the first urea joint can be further improved. As an alternative solution, the deflector 611 can also be set as a straight plate extending along the axial direction of the mixing pipe 61.

[0063] Optionally, as Figure 4 and Figure 8 shown, the mixing structure 6 further includes a baffle 62. The outer peripheral wall of the baffle 62 is hermetically connected to the inner peripheral wall of the second pipe section 52 in the circumferential direction. The inner peripheral wall of the baffle 62 is hermetically connected to the outer periphery of the mixing pipe 61 in the circumferential direction. And the baffle 62 is located below the multiple deflectors 611 along the first direction. By arranging the baffle 62, all the exhaust gas entering the second pipe section 52 enters the interior of the mixing pipe 61 through the vent hole 612 and mixes with the urea injected by the first urea joint and then flows to the third pipe section 53. Thus, the mixing effect of the exhaust gas entering the intake pipe 5 and the urea injected by the first urea joint can be further improved. Among them, the hermetic connection method can be welding or other connection methods.

[0064] Optionally, as Figure 4 and Figure 8 shown, the baffle 62 is further provided with a through hole 621. The through hole 621 communicates the second pipe section 52 and the third pipe section 53. A part of the exhaust gas entering the second pipe section 52 can directly flow to the third pipe section 53 through the through hole 621. So as to reduce the intake back pressure as much as possible and improve the use safety of the exhaust gas aftertreatment packaging device.

[0065] Further optionally, as Figure 8As shown, the number of vias 621 is multiple. The multiple vias 621 are circumferentially spaced along the baffle 62 to further reduce the safety hazard caused by the intake back pressure. Preferably, when the number of vias 621 is multiple, the multiple vias 621 are evenly circumferentially spaced along the baffle 62. The shapes of the multiple vias 621 can be set to be the same or at least different according to the actual working conditions. In this embodiment, as Figure 8 shown, two vias 621 are exemplarily arranged circumferentially spaced along the baffle 62. One via 621 is rectangular and the other via 621 is arc-shaped.

[0066] It can be understood that other types of mixing structures 6 can also be adaptively replaced according to the actual working conditions. It can be applicable to the exhaust gas aftertreatment packaging device and can improve the mixing effect of the exhaust gas entering the intake pipe 5 and the urea injected by the first urea connector.

[0067] Optionally, as Figures 2 to 5 shown, the connection between the output end of the second pipe section 52 and the third pipe section 53 is located on the outer periphery of the third pipe section 53. Along the first direction, the output end of the second pipe section 52 is located above the central axis of the third pipe section 53. Along the second direction, the output end of the second pipe section 52 is at least partially located on one side of the central axis of the third pipe section 53, and the first pipe section 51 is at least partially located on the other side of the central axis of the third pipe section 53. The central axis of the third pipe section 53 is parallel to the third direction; the second direction is perpendicular to the third direction and both are perpendicular to the first direction. Such a setting enables the mixed fluid to swirl and impact the inner peripheral wall of the third pipe section 53 after flowing into the third pipe section 53 and then flow into the pre-stage SCR11. Thereby, the mixing effect of the exhaust gas entering the intake pipe 5 and the urea injected by the first urea connector can be further improved.

[0068] In this embodiment, as Figures 2 to 5 shown, the output end of the second pipe section 52 is exemplarily arranged such that most of it is on one side of the central axis of the third pipe section 53. In other embodiments, the output end of the second pipe section 52 can also be arranged such that all of it is on one side of the central axis of the third pipe section 53. And so on.

[0069] Preferably, as Figures 2 to 5As shown, the output end of the third pipe segment 53 is located at the first end face 531 of the third pipe segment 53 along the axial direction. The second end face 532 of the third pipe segment 53 along the axial direction is distributed at an acute angle with the first end face 531. And the distance between the second end face 532 and the first end face 531 gradually decreases from top to bottom along the first direction. With such a setting, after the mixed fluid flows into the third pipe segment 53, a part of the mixed fluid impacts the second side face in the third pipe segment 53 and then swirls to impact the inner peripheral wall of the third pipe segment 53, and the remaining part of the mixed fluid directly swirls to impact the inner peripheral wall of the third pipe segment 53 in the third pipe segment 53 and then flows into the previous stage SCR11; thus, the mixing effect of the tail gas entering the intake pipe 5 and the urea injected by the first urea joint can be further improved. Secondly, setting the distance between the second end face 532 and the first end face 531 to gradually decrease from top to bottom along the first direction can adjust the flow rate of the mixed fluid flowing into the previous stage SCR11 per unit time.

[0070] Preferably, as Figure 2 shown, the included angle between the first end face 531 and the second end face 532 is β. β is an acute angle. The angle range of β is: 20° to 30°.

[0071] Preferably, the first pipe segment 51, the second pipe segment 52 and the third pipe segment 53 of the intake pipe 5 are integrally formed. It can reduce the number of components and improve the structural strength of the intake pipe 5.

[0072] In this embodiment, as Figures 1 to 3 shown, the top end of the first cover body 41 along the first direction is provided with a first through hole 411. As Figure 2 and Figure 3 shown, the top end of the second pipe segment 52 along the first direction is provided with a second through hole 521. The first through hole 411, the second through hole 521 and the inside of the second pipe segment 52 are sequentially communicated. Both the first through hole 411 and the second through hole 521 are used for installing the first urea joint.

[0073] In this embodiment, as Figure 3 shown, the top end of the first cover body 41 along the first direction is further provided with a third through hole 412. The first pipe segment 51 extends out of the top end of the first cover body 41 along the first direction through the third through hole 412. The inner peripheral wall of the third through hole 412 is sealingly connected to the outer peripheral wall of the first pipe segment 51. The sealing connection method can be the method of setting a sealing ring.

[0074] Among them, as Figures 1 to 3 shown, the previous stage assembly 1 further includes a previous stage DOC12 and a previous stage DPF13, and the previous stage SCR11, the previous stage DOC12 and the previous stage DPF13 are sequentially communicated along the third direction.

[0075] Among them, as Figures 1 to 3As shown, the post-stage component 2 further includes a post-stage ASC 22, and the post-stage SCR 21 and the post-stage ASC 22 are connected in sequence along the third direction.

[0076] Preferably, as Figures 1 to 3 shown, the number of the post-stage components 2 is two, and the two post-stage components 2 are spaced apart along the second direction. The input ends of the two post-stage components 2 are both connected to the first flow chamber 43. To further improve the post-treatment effect.

[0077] Among them, as Figure 2 and Figure 3 shown, the housing structure further includes a second end plate 44, and the second end plate 44 and the first end plate 42 are spaced apart along the third direction. The pre-stage DPF 13 and the two post-stage ASC 22 are both fixed to the second end plate 44.

[0078] Specifically, as Figures 1 to 3 shown, a second cover 45 is integrated on the side of the second end plate 44 away from the first end plate 42 along the third direction, and a second flow chamber is formed between the second end plate 44 and the second cover 45. The output end of the pre-stage DPF 13 and the input end of the urea mixer 3 are both connected to the second flow chamber.

[0079] Specifically, as Figures 1 to 3 shown, a third cover 46 is integrated on the side of the second end plate 44 away from the first end plate 42 along the third direction, and a third flow chamber is formed between the second end plate 44 and the third cover 46. One end of the third cover 46 away from the second end plate 44 along the third direction is integrated with an output pipe 47. The output ends of the two post-stage ASC 22 and the input end of the output pipe 47 are both connected to the third flow chamber. It can be understood that along the first direction, the third flow chamber is located above the second flow chamber. The third cover 46 is located above the second cover 45.

[0080] Preferably, the cross-sectional shape of the output pipe 47 along the first direction is kidney-shaped. To reduce the thickness of the second end plate 44 along the third direction on the basis of ensuring the gas flow efficiency. Thereby further improving the integration degree of the exhaust gas post-treatment packaging device.

[0081] Among them, the specific structures of the pre-stage SCR 11, the pre-stage DOC 12, the pre-stage DPF 13, the post-stage SCR 21, the post-stage ASC 22 and the urea mixer 3 all belong to the prior art, so they will not be described in detail here.

[0082] The present invention also provides a vehicle, including the above-mentioned exhaust gas post-treatment packaging device. By adopting the above-mentioned exhaust gas post-treatment packaging device, the post-treatment effect of the exhaust gas can be effectively improved.

[0083] Obviously, the above-mentioned embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. Exhaust gas aftertreatment encapsulation device, including an aftertreatment component, the aftertreatment component includes a pre-stage component (1), a urea mixer (3) and a post-stage component (2), the pre-stage component (1) includes a pre-stage SCR (11), the post-stage component (2) includes a post-stage SCR (21), characterized in that, The tail gas post-treatment encapsulation device further includes: A housing structure, which includes a first cover body (41) and a first end plate (42). The first cover body (41) covers the first end plate (42) and forms a first flow cavity (43) between the first cover body (41) and the first end plate (42); the pre-stage SCR (11), the urea mixer (3), and the post-stage SCR (21) are all fixedly arranged on the first end plate (42); the pre-stage SCR (11), the urea mixer (3), the first flow cavity (43), and the post-stage SCR (21) are communicated in sequence; along a first direction, the post-stage SCR (21) is located above the pre-stage SCR (11); An intake pipe (5), the first end of the intake pipe (5) extends out of the top end of the first cover body (41) along the first direction, and the second end of the intake pipe (5) is located in the first flow cavity (43) and is communicated with the input end of the pre-stage SCR (11); A first urea joint that partially extends into the intake pipe (5) is provided at the top end of the first cover body (41) along the first direction; a second urea joint is provided at the input end of the urea mixer (3).

2. The tail gas post-treatment encapsulation device according to claim 1, wherein, The intake pipe (5) includes a first pipe section (51), a second pipe section (52), and a third pipe section (53) that are communicated in sequence; the first pipe section (51) partially extends out of the top end of the first cover body (41) along the first direction; the first urea joint partially extends into the second pipe section (52); the output end of the third pipe section (53) is communicated with the input end of the pre-stage SCR (11); A mixing structure (6) is fixedly arranged in the second pipe section (52). The mixing structure (6) is used for mixing the urea sprayed by the first urea joint and the fluid flowing from the first pipe section (51) to the second pipe section (52), and conveying the mixed fluid to the third pipe section (53).

3. The tail gas aftertreatment encapsulation device according to claim 2, characterized in that, The mixing structure (6) includes a mixing pipe (61). The mixing pipe (61) is provided with a plurality of turned-out guide vanes (611). The plurality of guide vanes (611) are spaced apart along the circumferential direction of the mixing pipe (61), and a guide through hole (612) is formed at each guide vane (611); the guide through hole (612) communicates the inside and the outside of the mixing pipe (61); The direction of the fluid flowing out of the first pipe section (51) and the direction of the fluid flowing out of the mixing pipe (61) are distributed at an angle; at least part of the fluid flowing into the second pipe section (52) can flow through the guide through hole (612) and the inside of the mixing pipe (61) in sequence and flow to the third pipe section (53); the part of the first urea joint extending into the second pipe section (52) is located directly above the mixing pipe (61).

4. The exhaust gas post-treatment encapsulation device according to claim 3, characterized in that, The mixing pipe (61) is a conical pipe, and the end of the mixing pipe (61) close to the first urea joint along the axial direction is the small end of the mixing pipe (61).

5. The exhaust gas post-treatment encapsulation device according to claim 3, characterized in that, In the second direction, among the plurality of the flow guiding vanes (611), the one closest to the output end of the first pipe section (51) is the proximal reference flow guiding vane, and the one farthest from the output end of the first pipe section (51) is the distal reference flow guiding vane; the plurality of the flow guiding vanes (611) include two flow guiding vane groups, and the two flow guiding vane groups are respectively located on both sides of the proximal reference flow guiding vane and the distal reference flow guiding vane in the third direction; the second direction is perpendicular to the third direction and both are perpendicular to the first direction; From the proximal reference flow guiding vane to the distal reference flow guiding vane, the folding angles at which the plurality of flow guiding vanes (611) in each flow guiding vane group are folded outwards gradually increase.

6. The exhaust gas post-treatment encapsulation device according to claim 3, characterized in that, The flow guiding vanes (611) are spirally wound around the outer periphery of the mixing pipe (61).

7. The exhaust gas post-treatment encapsulation device according to claim 3, characterized in that, The mixing structure (6) further includes a baffle plate (62), the outer peripheral wall of the baffle plate (62) is hermetically connected to the inner peripheral wall of the second pipe section (52) in the circumferential direction, the inner peripheral wall of the baffle plate (62) is hermetically connected to the outer periphery of the mixing pipe (61) in the circumferential direction, and the baffle plate (62) is located below the plurality of flow guiding vanes (611) in the first direction.

8. The exhaust gas post-treatment encapsulation device according to claim 7, characterized in that, The baffle plate (62) is further provided with a through hole (621), and the through hole (621) communicates the second pipe section (52) and the third pipe section (53).

9. The exhaust gas aftertreatment encapsulation device according to any one of claims 2-8, characterized in that The connection between the output end of the second pipe section (52) and the third pipe section (53) is located on the outer periphery of the third pipe section (53); In the first direction, the output end of the second pipe section (52) is located above the central axis of the third pipe section (53); in the second direction, the output end of the second pipe section (52) is at least partially located on one side of the central axis of the third pipe section (53), and the first pipe section (51) is at least partially located on the other side of the central axis of the third pipe section (53); the central axis of the third pipe section (53) is parallel to the third direction; the second direction is perpendicular to the third direction and both are perpendicular to the first direction.

10. The exhaust gas post-treatment encapsulation device according to claim 9, wherein, The output end of the third pipe section (53) is located at the first end face (531) of the third pipe section (53) along the axis; the second end face (532) of the third pipe section (53) along the axis is distributed at an acute angle with the first end face (531), and the distance between the second end face (532) and the first end face (531) gradually decreases from top to bottom in the first direction.

11. The exhaust gas post-treatment encapsulation device according to claim 10, characterized in that, The acute angle range between the first end face (531) and the second end face (532) is: 20° to 30°.

12. A vehicle, characterized in that, Including the tail gas post-treatment packaging device according to any one of claims 1-11.

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