Post-processing device and vehicle

Abstract

According to the post-treatment device and the vehicle, a gas inlet pipe extends into a gas inlet cavity, a porous area on the gas inlet pipe can be used for introducing gas to be treated into the gas inlet cavity, and the gas to be treated is purified through a DOC carrier assembly and then is exhausted through a gas outlet cavity and a gas outlet tail pipe in sequence; due to the fact that the end, located in the air inlet cavity, of the air inlet pipe is fixedly connected with the inner wall of the outer shell, the vibration influence of the air inlet pipe caused by airflow vibration excited by pressure pulses generated by periodic opening and closing of an engine exhaust valve can be relieved, and meanwhile air is exhausted from the air inlet pipe through a porous area of the air inlet pipe. The porous area can play a role in absorbing and buffering noise energy, so that the low-frequency resonance area of the whole post-processing device can be reduced, and the noise is reduced.

Description

Technical Field

[0001] This application relates to the technical field of after-treatment, and particularly to an after-treatment device and a vehicle. Background Art

[0002] Exhaust noise is the main noise source of an automobile, and it is usually 10 - 15 dB(A) higher than other noises. The exhaust noise is mainly generated by the pressure pulse generated by the periodic opening and closing of the engine exhaust valve, which excites the airflow vibration.

[0003] Based on this, an after-treatment device capable of reducing noise is required. Summary of the Utility Model

[0004] The purpose of this application is to provide an after-treatment device and a vehicle, which can reduce the low-frequency resonance area of the entire after-treatment device and reduce noise.

[0005] The embodiments of this application can be implemented as follows:

[0006] In a first aspect, the present utility model provides an after-treatment device, including:

[0007] An outer housing;

[0008] An intake end cover assembly and an outlet end cover assembly respectively connected to both ends of the outer housing in the length direction;

[0009] A DOC carrier assembly fixed inside the outer housing, an intake cavity is formed between the intake end cover assembly and the DOC carrier assembly, and an outlet cavity is formed between the outlet end cover assembly and the DOC carrier assembly;

[0010] An intake pipe, at least part of the intake pipe is located in the intake cavity, and the end of the intake pipe located in the intake cavity is fixedly connected to the inner wall of the outer housing, and the part of the intake pipe located in the intake cavity has a porous area;

[0011] An outlet tail pipe, passing through the outlet end cover assembly and extending into the outlet cavity.

[0012] In an optional embodiment, the after-treatment device further includes a reinforcing plate located in the intake cavity, and the reinforcing plate is fixedly connected to the inner wall of the outer housing.

[0013] In an optional embodiment, the after-treatment device includes two such reinforcing plates, and the two reinforcing plates are distributed on both sides of the intake pipe.

[0014] In an optional embodiment, the reinforcing plate is a porous plate structure;

[0015] and / or,

[0016] A gap is left between the reinforcing plate and the intake pipe.

[0017] In an alternative embodiment, the intake end cover assembly includes an intake end cover and a first perforated plate; the intake end cover is connected to one end of the outer housing, and the middle region of the intake end cover is recessed away from the outer housing; the first perforated plate is connected to the side facing the interior of the outer housing in the edge region of the intake end cover.

[0018] In an alternative embodiment, the intake end cover assembly further includes at least one first fixing bracket, and the first fixing bracket is connected between the middle region of the intake end cover and the middle region of the first perforated plate.

[0019] In an alternative embodiment, the exhaust end cover assembly includes an exhaust end cover and a second perforated plate; the exhaust end cover is connected to the other end of the outer housing, and the middle region of the exhaust end cover is recessed away from the outer housing; the second perforated plate is connected to the side facing the interior of the outer housing in the edge region of the exhaust end cover; the exhaust tail pipe passes through the exhaust end cover and the second perforated plate.

[0020] In an alternative embodiment, the exhaust end cover assembly further includes at least one second fixing bracket connected between the middle region of the exhaust end cover and the middle region of the second perforated plate.

[0021] In an alternative embodiment, the porous region is distributed in an arc-shaped curved surface around the central axis of the intake pipe, wherein the edge part of the porous region faces the DOC carrier assembly;

[0022] and / or,

[0023] The part of the exhaust tail pipe located in the exhaust cavity has a porous pipe structure.

[0024] In a second aspect, the present invention provides a vehicle, including the post-treatment device according to any one of the foregoing embodiments.

[0025] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:

[0026] By extending the intake pipe into the intake cavity, the porous area on the intake pipe can be used to introduce the gas to be treated into the intake cavity. After the gas to be treated is purified through the DOC carrier assembly, it is discharged successively through the outlet cavity and the outlet tail pipe. Among them, since the end of the intake pipe located in the intake cavity is fixedly connected to the inner wall of the outer casing, the vibration influence brought by the pressure pulse excited airflow vibration generated by the periodic opening and closing of the engine exhaust valve can be reduced. At the same time, the gas is discharged from the intake pipe through the porous area of the intake pipe, and the porous area can play a role in absorbing and buffering the noise energy. In this way, the low-frequency resonance area of the entire aftertreatment device can be reduced and the noise can be lowered. Description of the Drawings

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Is a perspective view of the aftertreatment device according to an embodiment of the present application;

[0029] Figure 2 Is Figure 1 A cross-sectional view of;

[0030] Figure 3 Is one of the schematic views of the aftertreatment device according to an embodiment of the present application after hiding the outer casing;

[0031] Figure 4 Is another schematic view of the aftertreatment device according to an embodiment of the present application after hiding the outer casing;

[0032] Figure 5 Is an exploded view of the intake end cap assembly according to an embodiment of the present application;

[0033] Figure 6 Is an exploded view of the outlet end cap assembly according to an embodiment of the present application.

[0034] Reference numerals: 10 - outer casing; 20 - intake end cap assembly; 21 - intake end cap; 22 - first porous plate; 23 - first fixing bracket; 30 - intake pipe; 31 - porous area; 40 - reinforcing plate; 50 - DOC carrier assembly; 60 - outlet end cap assembly; 61 - outlet end cap; 610 - first mounting hole; 62 - second porous plate; 620 - second mounting hole; 63 - second fixing bracket; 70 - outlet tail pipe; 71 - porous pipe structure. Detailed Embodiments

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the detailed description of the embodiments of this application provided in the drawings below is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0037] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0039] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0040] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0041] The following combines the attached Figures 1 to 6, some embodiments of the present application will be described in detail. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0042] An embodiment of the present application discloses a post-treatment device, which is mainly used to be installed on a vehicle and connected in series with an engine exhaust passage to purify exhaust gas.

[0043] The post-treatment device includes a housing 10, an intake end cover assembly 20, an intake pipe 30, a DOC carrier assembly 50, an outlet end cover assembly 60, and an outlet tail pipe 70.

[0044] The housing 10 has a hollow structure, which can be a rectangular structure that is generally hollow and open at both ends in the length direction, and of course can also be a cylindrical structure that is generally hollow and open at both ends, as long as it can accommodate the DOC carrier assembly 50, the intake end cover assembly 20, the intake pipe 30, the outlet end cover assembly 60, and the outlet tail pipe 70 for installation.

[0045] The DOC carrier assembly 50 fixed inside the housing 10 forms an intake cavity between the intake end cover assembly 20 and the DOC carrier assembly 50, and forms an outlet cavity between the outlet end cover assembly 60 and the DOC carrier assembly 50;

[0046] The intake pipe 30 is at least partially located in the intake cavity of the housing 10, and the end of the intake pipe 30 located in the intake cavity is fixedly connected to the inner wall of the housing 10. The portion of the intake pipe 30 located in the intake cavity has a porous area 31;

[0047] The outlet tail pipe 70 passes through the outlet end cover assembly 60 and extends into the outlet cavity.

[0048] In this way, by extending the intake pipe 30 into the intake cavity, the porous area 31 on the intake pipe 30 can be used to introduce the gas to be treated into the intake cavity. After the gas to be treated is purified through the DOC carrier assembly 50, it is discharged through the outlet cavity and the outlet tail pipe 70 in sequence. Among them, since the end of the intake pipe 30 located in the intake cavity is fixedly connected to the inner wall of the housing 10, the vibration influence brought by the pressure pulse excited by the periodic opening and closing of the engine exhaust valve, which causes the airflow vibration, can be reduced. At the same time, the gas is discharged from the intake pipe 30 through the porous area 31 of the intake pipe 30, and the porous area 31 can play a role in absorbing and buffering the noise energy, so that the low-frequency resonance area of the entire post-treatment device can be reduced and the noise can be lowered.

[0049] It should be noted that in the exhaust gas treatment technology, the "DOC carrier" specifically refers to the carrier used in the Diesel Oxidation Catalyst. DOC is the abbreviation of Diesel Oxidation Catalyst, which is used to reduce harmful emissions. Its working principle is to use a catalyst to accelerate the oxidation reaction of carbon monoxide (CO), hydrocarbons (HC), and some particulate matter in the exhaust gas, converting them into harmless carbon dioxide (CO2), water (H2O), and other substances. At the same time, DOC can also convert some nitrogen oxides (NO) into nitrogen dioxide (NO2), providing more suitable reaction conditions for subsequent emission reduction technologies (such as Selective Catalytic Reduction (SCR) systems) and improving the overall exhaust gas treatment efficiency. The DOC carrier is usually made of metal or ceramic materials, which have a high specific surface area and good thermal stability to ensure that the catalyst can effectively contact the exhaust gas and withstand the high temperature of the engine exhaust. Ceramic carriers are widely used in DOC systems due to their high temperature resistance, high mechanical strength, and good chemical stability. These carriers are coated with noble metals (such as platinum, palladium) or base metal catalysts on their surfaces to promote the occurrence of oxidation reactions.

[0050] In this embodiment, the side wall of the outer housing 10 is provided with a through air inlet mounting hole, and the air inlet pipe 30 is inserted through the air inlet mounting hole and is in sealing fit, so that one end of the air inlet pipe 30 is located inside the air inlet cavity, and the other end is located outside the outer housing 10 for the exhaust gas to pass through. Of course, in some embodiments, the air inlet pipe 30 can also be entirely located inside the air inlet cavity, and the other end is connected to the air inlet mounting hole, and then connecting to an external exhaust gas pipe is also feasible.

[0051] The connection method between the end of the air inlet pipe 30 located inside the air inlet cavity and the inner wall of the outer housing 10 is not specifically limited, and it can be welded to reduce the vibration of the outer housing 10 and further reduce the generation of noise.

[0052] The porous area 31 on the air inlet pipe 30 is distributed in an arc-shaped curved surface around the central axis of the air inlet pipe 30. The shape of the radial cross-section of the arc-shaped curved surface is a major arc. Therefore, the central angle of the distribution of the porous area 31 on the air inlet pipe 30 is greater than 180°, and the edge part of the porous area 31 faces the DOC carrier assembly 50; that is, most of the porous area 31 is close to the air inlet end cover assembly 20, and a small part is close to the DOC carrier assembly 50. The gas in the air inlet pipe 30 mainly enters the air inlet cavity from the area facing the air inlet end cover assembly 20, reducing the noise energy, and this can also reduce the gas pressure loss and enable the gas to enter the DOC carrier assembly 50 evenly for purification treatment, avoiding affecting the back pressure and treatment uniformity of the post-treatment device itself.

[0053] Optionally, the post-treatment device further includes a reinforcing plate 40 located in the intake cavity, and the reinforcing plate 40 is fixedly connected to the inner wall of the outer housing 10. In this way, the reinforcing plate 40 is used to improve the strength of the outer housing 10, thereby avoiding the vibration of the outer housing 10, further reducing the low-frequency resonance area of the post-treatment device, and reducing noise.

[0054] Specifically, the post-treatment device has two reinforcing plates 40, and the two reinforcing plates 40 are distributed on both sides of the intake pipe 30. In this way, it can be ensured that the area of the outer housing 10 corresponding to the intake pipe 30 is better supported by the reinforcing plates 40, ensuring the structural strength.

[0055] Among them, the shown reinforcing plate 40 is a porous plate structure, and there is a gap between the reinforcing plate 40 and the intake pipe 30, so that the gas discharged from the porous area 31 of the intake pipe 30 towards the intake end cap assembly 20 can pass through the reinforcing plate 40 and enter the DOC carrier assembly 50, avoiding the influence of the setting of the reinforcing plate 40 on the back pressure of the post-treatment device.

[0056] The connection between the reinforcing plate 40 and the inner wall of the outer housing 10 can be welding, thereby reducing the vibration phenomenon of the outer housing 10 and further reducing noise.

[0057] The intake end cap assembly 20 includes an intake end cap 21 and a first porous plate 22; the intake end cap 21 is connected to one end of the outer housing 10, and the middle area of the intake end cap 21 is recessed outward relative to the outer housing 10, that is, the middle area of the intake end cap 21 is recessed in the direction away from the outer housing 10; the first porous plate 22 is connected to the side of the edge area of the intake end cap 21 facing the inside of the outer housing 10. In this way, the intake end cap 21 is used to close one end of the outer housing 10, and an intake cavity is formed between the intake end cap 21 and the DOC carrier assembly 50. At the same time, the setting of the first porous plate 22 can absorb noise energy and further reduce the generation of noise.

[0058] Among them, the intake end cap assembly 20 further includes at least one first fixing bracket 23 connected between the middle area of the intake end cap 21 and the middle area of the first porous plate 22. For example, it can be the four first fixing brackets 23 shown in the figure. In this way, the connection reliability between the intake end cap 21 and the first porous plate 22 can be improved, and the vibration of the first porous plate 22 can be avoided.

[0059] The air outlet end cover assembly 60 includes an air outlet end cover 61 and a second perforated plate 62; the air outlet end cover 61 is connected to the other end of the outer housing 10, and the middle area of the air outlet end cover 61 is recessed outward relative to the outer housing 10, that is, the middle area of the air inlet and outlet end cover 61 is recessed in a direction away from the outer housing 10; the second perforated plate 62 is connected to the side of the edge area of the air outlet end cover 61 facing the inside of the outer housing 10; the air outlet tail pipe 70 passes through the air outlet end cover 61 and the second perforated plate 62 to extend into the air outlet cavity, ensuring that the processed gas can be normally discharged from the air outlet tail pipe 70. In this way, the other end of the outer housing 10 is closed by the air outlet end cover 61, and an air outlet cavity is formed between the air outlet end cover 61 and the DOC carrier assembly 50. At the same time, the second perforated plate 62 is provided to absorb the noise energy transmitted to the rear end, further reducing the generation of noise.

[0060] Among them, the air outlet end cover assembly 60 further includes at least one second fixing bracket 63 connected between the middle area of the air outlet end cover 61 and the middle area of the second perforated plate 62. For example, it can be the three second fixing brackets 63 shown in the figure. In this way, the connection reliability between the air outlet end cover 61 and the first perforated plate 22 can be improved, and the second perforated plate 62 can be prevented from vibrating.

[0061] Of course, in order to facilitate the air outlet tail pipe 70 to pass through the air outlet end cover 61 and the second perforated plate 62, the air outlet end cover 61 is provided with a first mounting hole 610, and the corresponding second perforated plate 62 is provided with a second mounting hole 620. The first mounting hole 610 and the second mounting hole 620 are coaxially arranged, and the air outlet tail pipe 70 passes through the first mounting hole 610 and the second mounting hole 620 and is sealed.

[0062] It should also be noted that the part of the air outlet tail pipe 70 located inside the outer housing 10 is a porous pipe structure 71, that is, a plurality of openings are provided in the part of the air outlet tail pipe 70 located in the air outlet cavity, so as to facilitate the smooth flow of air, reduce the overall back pressure of the post-treatment device, and also reduce the generation of noise.

[0063] In summary, the embodiment of the present application discloses a post-treatment device and a vehicle. By extending the intake pipe 30 into the intake cavity, the porous area 31 on the intake pipe 30 can be used to introduce the gas to be treated into the intake cavity. After the gas to be treated is purified by the DOC carrier assembly 50, it is discharged through the air outlet cavity and the air outlet tail pipe 70 in sequence. Among them, since the end of the intake pipe 30 located in the intake cavity is fixedly connected to the inner wall of the outer housing 10, the vibration influence brought by the pressure pulse generated by the periodic opening and closing of the engine exhaust valve exciting the air flow vibration of the intake pipe 30 can be reduced. At the same time, the gas is discharged from the intake pipe 30 through the porous area 31 of the intake pipe 30, and the porous area 31 can play a role in absorbing and buffering the noise energy. In this way, the low-frequency resonance area of the entire post-treatment device can be reduced and the noise can be reduced.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A post-processing device, characterized in that: include: An outer shell (10); An air inlet cover assembly (20) and an air outlet cover assembly (60) respectively connected to both ends of the outer shell (10) in the length direction; A DOC carrier assembly (50) is fixed inside the outer shell (10), an air inlet cavity is formed between the air inlet end cover assembly (20) and the DOC carrier assembly (50), and an air outlet cavity is formed between the air outlet end cover assembly (60) and the DOC carrier assembly (50); an air intake pipe (30), at least a portion of the air intake pipe (30) being located in the air intake cavity, and an end portion of the air intake pipe (30) located in the air intake cavity being fixedly connected to an inner wall of the outer shell (10), and a portion of the air intake pipe (30) located in the air intake cavity having a porous region (31); An outlet tail pipe (70) passes through the outlet end cover assembly (60) and extends into the outlet cavity.

2. The post-processing device according to claim 1, characterized in that: The post-processing device further comprises a reinforcing plate (40) located in the air inlet cavity, wherein the reinforcing plate (40) is fixedly connected to the inner wall of the outer shell (10).

3. The post-processing device according to claim 2, characterized in that: The post-processing device comprises two reinforcing plates (40), and the two reinforcing plates (40) are distributed on both sides of the air intake pipe (30).

4. The post-processing device according to claim 2 or 3, characterized in that: The reinforcing plate (40) is a porous plate structure; and / or, A gap is left between the reinforcing plate (40) and the air intake pipe (30).

5. The post-processing device according to claim 4, characterized in that: The air intake end cover assembly (20) comprises an air intake end cover (21) and a first porous plate (22); the air intake end cover (21) is connected to one end of the outer shell (10), and a middle area of ​​the air intake end cover (21) is recessed in a direction away from the outer shell (10); and the first porous plate (22) is connected to a side of an edge area of ​​the air intake end cover (21) facing the interior of the outer shell (10).

6. The post-processing device according to claim 5, characterized in that: The air intake end cover assembly (20) further comprises at least one first fixing bracket (23), wherein the first fixing bracket (23) is connected between a middle area of ​​the air intake end cover (21) and a middle area of ​​the first porous plate (22).

7. The post-processing device according to claim 6, characterized in that: The gas outlet cover assembly (60) comprises a gas outlet cover (61) and a second porous plate (62); the gas outlet cover (61) is connected to the other end of the outer shell (10), and the middle area of ​​the gas outlet cover (61) is recessed in a direction away from the outer shell (10); the second porous plate (62) is connected to a side of the edge area of ​​the gas outlet cover (61) facing the inside of the outer shell (10); and the gas outlet tail pipe (70) is arranged through the gas outlet cover (61) and the second porous plate (62).

8. The post-processing device according to claim 7, characterized in that: The gas outlet cover assembly (60) further comprises at least one second fixing bracket (63) connected between the middle area of ​​the gas outlet cover (61) and the middle area of ​​the second porous plate (62).

9. The post-processing device according to claim 1 or 8, characterized in that: The porous area (31) is distributed in an arc-shaped curved surface around the central axis of the air intake pipe (30), wherein the edge of the porous area (31) faces the DOC carrier component (50); and / or, The portion of the outlet tail pipe (70) located in the outlet cavity is a multi-hole tube structure (71).

10. A vehicle, characterized in that: The invention comprises the post-processing device according to any one of claims 1 to 9.

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