CN217300695U

CN217300695U - Vehicle aftertreatment device

Info

Publication number: CN217300695U
Application number: CN202221235837.0U
Authority: CN
Inventors: 张言库; 闫娟; 高伟; 霍翠英
Original assignee: Weichai Power Co Ltd; Weichai Power Emission Solutions Technology Co Ltd
Current assignee: Weichai Power Co Ltd; Weichai Power Emission Solutions Technology Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-08-26
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a vehicle aftertreatment device, including barrel, DOC carrier and DPF carrier, the barrel has the inlet end and gives vent to anger the end, and the barrel has first appearance chamber and second appearance chamber along the air current flow direction, and the DOC carrier sets up in first appearance chamber, the DPF carrier sets up in the second appearance chamber, and the DPF carrier is provided with the portion of gripping towards the one side of giving vent to anger the end. The DOC carrier and the DPF carrier are connected through the cylinder body, so that the air tightness between the DOC carrier and the DPF carrier is improved, the risk of tail gas leakage caused by different installation shafts or untight installation is avoided, in addition, the DOC carrier and the DPF carrier are not required to be connected through a hoop and a gasket, the front end cone and the rear end cone are not required to be used for packaging, parts are saved, the production cost is reduced, the risk of losing parts during disassembly and assembly is reduced, the assembly process is simplified, and the DOC carrier and the DPF carrier are convenient to install, disassemble and maintain; the DPF carrier is provided with the portion of gripping towards the one side of the end of giving vent to anger, and operating personnel can outwards take out the DPF carrier from the end of giving vent to anger of barrel through the portion of gripping, easy operation, and it is convenient to maintain.

Description

Vehicle aftertreatment device

Technical Field

The utility model belongs to the technical field of the diesel engine tail gas aftertreatment, concretely relates to vehicle aftertreatment device.

Background

The technical route of vehicle aftertreatment systems is generally implemented in the route of oxidative catalysts (DOC), diesel particulate traps (DPF), Selective Catalytic Reducers (SCR).

Wherein doc (diesel Oxidation catalyst): an oxidative catalyst for a diesel engine is a device that converts carbon monoxide and hydrocarbons in engine exhaust gas into harmless water and carbon dioxide. The method is mainly used for oxidizing nitric oxide in the waste gas into nitrogen dioxide in the national emission treatment, so that the conversion speed and efficiency of nitrogen oxide in the subsequent SCR are increased; and oxidizing fuel injected during DPF regeneration to raise the temperature, so as to prepare for DPF regeneration in the early stage.

DPF (diesel Particulate Filter): the diesel particulate trap realizes the trapping of particulates by forcing airflow to pass through a porous wall surface by alternately plugging the inlet and the outlet of carrier pores of the trap. The collection efficiency reaches more than 90 percent, and the emission pollutants such as PM2.5 in the exhaust gas are effectively reduced.

With the implementation of the national emission standards, the requirements on the control of automobile exhaust emission pollutants are more and more strict. The DPF can effectively filter 70% -95% of particles in the tail gas, and becomes standard configuration in the exhaust control device of the national six-standard diesel engine, so that the DPF is widely applied. When tail gas passes through the DPF, a large amount of particulate matters are adsorbed by the DPF, and with the increase of working time, the particulate matters adsorbed by the DPF are gradually accumulated, an air flow channel is narrowed, so that exhaust backpressure is increased, and then the DPF needs to be regenerated and maintained. Currently, the accumulated carbon particles in the DPF are oxidized by means of active regeneration or passive regeneration. However, the exhaust gas also contains sulfides, ash generated by combustion of engine oil, and the like, and cannot be treated by active regeneration or passive regeneration. Therefore, regardless of the regeneration technique, the DPF must be periodically disassembled to clean the ash.

In the existing aftertreatment device, when the DOC and the DPF are taken out to be cleaned and replaced, a plurality of groups of flanges need to be disassembled, and the whole aftertreatment device needs to be disassembled; and during the installation, DOC and DPF pass through clamp fastening flange and realize connecting, take place radial dislocation easily between DOC and the DPF, and DOC and DPF that lead to after the connection are not at same axis, and then lead to the junction to have the risk of gas leakage.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vehicle aftertreatment device to solve at least one among the above-mentioned technical problem.

The utility model discloses the technical scheme who adopts does:

the utility model provides a vehicle aftertreatment device, includes barrel, DOC carrier and DPF carrier, and the barrel has inlet end and the end of giving vent to anger, and the barrel has first appearance chamber and second appearance chamber along the air current flow direction, and the DOC carrier sets up in first appearance chamber, the DPF carrier sets up in the second appearance chamber, and the DPF carrier is provided with the portion of gripping.

The DOC carrier is a structure made of metal materials and is fixed on the inner wall of the first cavity.

The barrel still is provided with annular muscle position, and annular muscle position encircles in the periphery of barrel and projects towards the barrel is inside to form the backstop arch at the barrel inner wall, form the recess at the barrel outer wall.

The end of giving vent to anger is provided with first connecting portion, and the DPF carrier is provided with can with first connecting portion backstop complex second connecting portion.

The vehicle aftertreatment device further comprises a flow guide part, wherein the flow guide part is provided with a flow guide cavity, and the flow guide part is connected to the air outlet end of the barrel.

The water conservancy diversion spare has first through-hole and second through-hole, and first through-hole is connected in the end of giving vent to anger of barrel and is used for the air current to flow in, and the second through-hole is used for the air current to flow out.

The water conservancy diversion spare has third connecting portion, and vehicle aftertreatment device still includes the clamp, and the clamp can be fixed in first connecting portion in one side that the second connecting portion is close to the inlet end to the clamp can be fixed in the one side that the inlet end was kept away from to the second connecting portion with the third connecting portion.

The vehicle aftertreatment device further comprises gaskets arranged between the first connecting portion and the second connecting portion and between the second connecting portion and the third connecting portion.

The portion of gripping has the hole of gripping and grips the board, grips the hole and has the strengthening rib towards the one side of the direction of giving vent to anger, and the board is gripped in the strengthening rib connection to it extends to the direction of giving vent to anger to grip the board.

The cylinder body is provided with a mounting hole for mounting the sensor, and the mounting hole is positioned between the DOC carrier and the DPF carrier.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:

1. the cylinder body is provided with a first containing cavity and a second containing cavity, the DOC carrier is arranged in the first containing cavity, the DPF carrier is arranged in the second containing cavity, and the DOC carrier and the DPF carrier are connected through the cylinder body, so that on one hand, the air tightness between the DOC carrier and the DPF carrier is improved, and the risk of tail gas leakage caused by the fact that the DOC carrier and the DPF carrier are not installed coaxially or not tightly is avoided, on the other hand, the DOC carrier and the DPF carrier are not required to be connected through a hoop and a gasket, and are not required to be packaged by using front and rear end cones, parts are saved, the production cost is reduced, the risk of losing the parts during disassembly and assembly is reduced, meanwhile, the assembly process is simplified, and the installation, disassembly and maintenance are convenient; the DPF carrier is provided with the portion of gripping, and when the DPF carrier need be dismantled and maintain, operating personnel can outwards take out the DPF carrier from the end of giving vent to anger of barrel through the portion of gripping, easy operation, and it is convenient to maintain.

2. As a preferred embodiment of the present invention, the DOC carrier is a structure made of a metal material and fixed to an inner wall of the first cavity; do DOC carrier need not be sealed by front and back end awl, also need not set up the liner between DOC carrier and the inner wall that holds the chamber first, simplify the structure, convenient assembly, DOC carrier is fixed in the inner wall that holds the chamber first simultaneously and makes DOC carrier can not be at the working process of vehicle, because the shake of vehicle self and produce the radial displacement for the barrel, avoid DOC carrier and barrel to bump and produce the abnormal sound and lead to the DOC carrier to take place the normal work that damaged influence vehicle aftertreatment system even.

3. As a preferred embodiment of the utility model, the cylinder body is also provided with an annular rib position so as to form a stop bulge on the inner wall of the cylinder body and a groove on the outer wall of the cylinder body; the formed stopping bulge can prevent the DOC carrier or the DPF carrier from sliding in the cylinder body along the axial direction of the cylinder body; the groove formed in the outer wall of the barrel body can facilitate installation of the connection clamp, the vehicle post-processing device is connected with the frame through the connection clamp, meanwhile, the groove can limit the connection clamp along the axial direction of the barrel body, and the vehicle post-processing device and the connection clamp are prevented from moving relative to each other along the axial direction of the barrel body.

4. As a preferred embodiment of the present invention, the flow guiding member has a first through hole and a second through hole, the first through hole is connected to the air outlet end and is used for air flow to flow in, and the second through hole is used for air flow to flow out; the air current that flows from the end of giving vent to anger of barrel can follow first through-hole inflow water conservancy diversion chamber and flow out from the second through-hole again, and the water conservancy diversion spare can change the direction of air current through the relative position of first through-hole and second through-hole, makes the air current direction and cooperatees with the blender that installs additional for the air current produces the vortex more easily in the blender, makes urea solution fully contact with the air current in the blender mix, improves tail gas catalytic reduction reaction's efficiency.

5. As a preferred embodiment of the present invention, the vehicle post-processing device further includes a clamp, which can fix the first connection portion and the third connection portion to both sides of the second connection portion; the second connecting part of the DPF carrier can be stopped with the first connecting part of the outer shell to form a limiting effect on the DPF carrier; the clamp is used for fixing the first connecting part and the third connecting part on two sides of the second connecting part, so that the outer shell, the DPF assembly and the flow guide piece are fixed together.

6. As a preferred embodiment of the present invention, a reinforcing rib is provided at one side of the holding hole facing the air outlet direction, the reinforcing rib is connected to the holding plate, and the holding plate extends in the air outlet direction; grip the hole, the strengthening rib and grip the combination of board, the operating personnel of being convenient for more exerts pulling force to the portion of gripping to take the DPF carrier out in from the barrel, will grip the hole through the strengthening rib and link together with the board that grips, improved the bulk strength of the portion of gripping, the board that grips sets up to extending to the direction of giving vent to anger, reduce the board that grips and to the effect that blocks of air current, avoid the ash content that the air current carried to pile up in a large number in the surface of gripping the board, influence the air current and circulate.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a sectional view of a vehicle aftertreatment device according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of the vehicle aftertreatment device of FIG. 1;

FIG. 3 is a schematic structural view of the cartridge of FIG. 1;

FIG. 4 is a schematic structural view of the DPF carrier of FIG. 1;

FIG. 5 is a schematic view of the baffle of FIG. 1;

fig. 6 is an enlarged view of a portion a of the vehicle aftertreatment device in fig. 1.

Wherein:

1, a cylinder body; 11 an air inlet end; 12, an air outlet end; 13 a first volume; 14 a second cavity; 15 annular rib positions; 151 stop boss; 152 grooves; 16 a first connection portion; 17 mounting holes;

2DOC carrier;

3 a DPF carrier; 31 a grip portion; 311 a holding hole; 312 reinforcing ribs; 313 holding the plate; 32 a second connecting portion;

4, a flow guide part; 41 a flow guide cavity; 42 a first through-hole; 43 a second via; 44 a third connecting portion;

5, clamping a hoop;

6 spacer.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description herein, references to the terms "embodiment," "an example" or "specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 5, a vehicle aftertreatment device includes a cylinder 1, DOC carriers 2, and DPF carriers 3, where the cylinder 1 has an air inlet end 11 and an air outlet end 12, the cylinder 1 has a first accommodating cavity 13 and a second accommodating cavity 14 along an airflow flowing direction, the DOC carriers 2 are disposed in the first accommodating cavity 13, the DPF carriers 3 are disposed in the second accommodating cavity 14, and the DPF carriers 3 are provided with a holding portion 31.

The DOC carrier is characterized in that the cylinder body 1 is provided with a first containing cavity 13 and a second containing cavity 14, the DOC carrier 2 is arranged in the first containing cavity 13, the DPF carrier 3 is arranged in the second containing cavity 14, and the DOC carrier 2 and the DPF carrier 3 are connected through the cylinder body 1, so that on one hand, the air tightness between the DOC carrier 2 and the DPF carrier 3 is improved, and compared with a mode of connecting the DOC carrier 2 and the DPF carrier 3 through a clamp and a flange, the tail gas leakage risk caused by the fact that the DOC carrier 2 and the DPF carrier 3 are not installed coaxially or installed tightly can not occur; on the other hand, the DOC carrier 2 and the DPF carrier 3 do not need to be connected through other connecting pieces, and do not need to be packaged by using front and rear end cones, so that parts are saved, the production cost is reduced, the risk of losing parts during disassembly and assembly is reduced, the assembly process is simplified, and the assembly, disassembly and maintenance are convenient; the DPF carrier 3 is provided with the holding part 32, when the DPF carrier 3 needs to be disassembled for maintenance, an operator can take out the DPF carrier 3 from the air outlet end 12 of the cylinder 1 through the holding part 32, the operation is simple, and the maintenance is convenient.

As a preferred embodiment of the present invention, DOC carrier 2 is a structure made of a metal material and fixed to the inner wall of first cavity 13.

DOC carrier 2 does not need the installation front and back end awl to encapsulate DOC carrier 2 for metal carrier, because DOC carrier 2 snap-on is at the inner wall that first holds chamber 13, all need not set up the liner between DOC carrier 2 and the inner wall that first holds the chamber, DOC carrier 2 is fixed in the inner wall that first holds chamber 13 and makes DOC carrier 2 can not be at the working process of vehicle, because the shake of vehicle self and take place for barrel 1 radial displacement, avoid DOC carrier 2 and barrel 1 to bump and produce the abnormal sound and lead to DOC carrier 2 to appear the normal work that damaged influence whole vehicle aftertreatment system even.

As shown in fig. 1 to 3, as a preferred embodiment of the present invention, the barrel 1 is further provided with an annular rib position 15, the annular rib position 15 surrounds the periphery of the barrel 1 and protrudes toward the inside of the barrel 1, so as to form a stopping protrusion 151 on the inner wall of the barrel 1 and a groove 152 on the outer wall of the barrel. The annular rib position 15 is arranged between the first accommodating cavity 13 and the second accommodating cavity 14, and the inner diameter of the stop protrusion 151 is the minimum inner diameter of the cylinder 1.

The formed stopping protrusion 151 can separate the first accommodating cavity 13 from the second accommodating cavity 14, and the inner diameter of the stopping protrusion 151 is the minimum inner diameter of the cylinder 1, so that the stopping protrusion 151 can form a stopper with the DOC carrier 2 or the DPF carrier 3 to prevent the DOC carrier 2 from entering the second accommodating cavity 14 from the first accommodating cavity 13 or prevent the DPF carrier 3 from entering the first accommodating cavity 13 from the second accommodating cavity 14; recess 152 that forms at barrel 1 outer wall can be easy to assemble the connection clamp to be connected vehicle aftertreatment device and frame through the connection clamp, recess 152 can be carried out along barrel 1 axial spacing to the connection clamp simultaneously, prevents that vehicle aftertreatment device and connection clamp from taking place along barrel 1 axial relative displacement.

As shown in fig. 1 to 4, as a preferred embodiment of the present invention, the gas outlet end 12 is provided with a first connecting portion 16, and the DPF carrier 3 is provided with a second connecting portion 32 capable of being engaged with the first connecting portion 16 in a stop manner.

Through first connecting portion 16 and second connecting portion 32 fixed connection, link barrel 1 and DPF carrier 3 together, simultaneously, first connecting portion 16 forms the backstop with second connecting portion 32, produces limiting displacement to DPF carrier 3.

The specific structure of the first connecting portion 16 and the second connecting portion 32 is not limited, and may be a structure formed by flanging or a flange. Preferably, the first connecting portion 16 and the second connecting portion 32 are spinning flanges, and the second connecting portion 32 is located at one end of the holding portion 31 close to the air inlet end 11, so that after the second connecting portion 32 and the first connecting portion 16 form a stop, the holding portion 31 does not enter the inside of the cylinder 1, and an operator can apply a pulling force to the holding portion 31 to pull the DPF carrier 3 out of the cylinder 1.

As shown in fig. 1 and 5, as a preferred example of the present embodiment, the vehicle aftertreatment device further includes a flow guide member 4, the flow guide member 4 has a flow guide cavity 41, and the flow guide member 4 is connected to the air outlet end 12 of the drum 1.

For example, in one embodiment, the flow guiding element 4 can cooperate with an SCR mixer (not shown) of the vehicle aftertreatment system, the airflow flows out from the air outlet end 12 of the cylinder 1 into the flow guiding cavity 41, the airflow space in the flow guiding cavity 41 is sufficient, the uniformity and the overall backpressure of the airflow are ensured, the flow guiding cavity 41 can also change the airflow direction to cooperate with the SCR mixer, so that the airflow forms a vortex in the SCR mixer, the urea solution is conveniently mixed and contacted with the airflow, and the efficiency of the catalytic reduction reaction of the exhaust gas is improved.

As shown in fig. 5, as a specific example under the present embodiment, the flow guide member 4 has a first through hole 42 and a second through hole 43, the first through hole 42 is connected to the air outlet end 12 of the cylinder 1 and is used for air flow inflow, and the second through hole 43 is used for air flow outflow.

Specifically, the axes of the first through hole 42 and the second through hole 43 are parallel, the first through hole 42 and the second through hole 43 are located on the same side surface of the baffle 4, and the baffle chamber 41 communicates with the first through hole 42 and the second through hole 43, respectively, so that the direction of the air flow flowing in from the first through hole 42 is opposite to the direction of the air flow flowing out from the second through hole 43, the length of the entire vehicle aftertreatment system can be shortened, and the installation is facilitated; the aperture of the second through hole 43 is smaller than that of the first through hole 42, and under the condition that the total airflow amount is not changed, the aperture of the second through hole 43 is smaller, so that the pressure of the airflow flowing out of the second through hole 43 is improved, the mixing degree of the airflow entering the rear-end SCR mixer and the urea solution is improved, and the efficiency of the tail gas catalytic reduction reaction is improved.

As shown in fig. 1, 2, 5, and 6, as a specific example under the present embodiment, the baffle 4 has a third connecting portion 44, the vehicle aftertreatment device further includes a clip 5, the clip 5 is capable of fixing the first connecting portion 16 to a side of the second connecting portion 32 close to the air intake end 11, and the clip 5 is capable of fixing the third connecting portion 44 to a side of the second connecting portion 32 away from the air intake end 11.

Third connecting portion 44 is the same with first connecting portion 16 and second connecting portion 32, all is the spinning flange, and first connecting portion 16 is located one side that second connecting portion 32 is close to inlet end 11, and third connecting portion 44 is located one side that inlet end 11 was kept away from to second connecting portion 32, and as preferred, the V clamp is chooseed for use to clamp 5, convenient to use, and the fixity can the reinforce, improves the gas tightness between shell body, DPF assembly and the water conservancy diversion chamber, and convenient to detach maintains.

Further, the vehicle aftertreatment device further includes a gasket 6, and the gasket 6 is disposed between the first connection portion 16 and the second connection portion 32 and between the second connection portion 32 and the third connection portion 44.

Gaskets 6 are arranged between the first connecting part 16 and the second connecting part 32 and between the second connecting part 32 and the third connecting part 44, and are tightly connected through V-shaped clamps, so that the air tightness of the first connecting part, the second connecting part and the third connecting part is improved, and tail gas is prevented from leaking from the connecting parts; meanwhile, the gasket 6 can also play a role in buffering, and prevent the first connecting portion 16, the second connecting portion 32 and the third connecting portion 44 from being damaged by overlarge fastening force of the V-shaped clamp.

The gasket 6 is selected, but the invention is not limited, and can be a rubber gasket, a metal gasket and the like, and as the preference, the graphite gasket is selected; the graphite gasket has good corrosion resistance, high temperature resistance or low temperature resistance, good compression resilience and high strength, so that the graphite gasket can not be corroded by corrosive chemical elements in tail gas and can bear the high temperature brought by the tail gas while providing good air tightness.

As shown in fig. 4, as a preferred embodiment of the present invention, the grip portion 31 has a grip hole 311 and a grip plate 313, the grip hole 311 has a rib 312 on one side facing the air outlet direction, the rib 312 is connected to the grip plate 313, and the grip plate 313 extends in the air outlet direction.

Specifically, the reinforcing rib 312 has a curved surface and is connected to the holding plate 313 extending in a direction away from the air inlet end 11, and first, the area that can be held by an operator is increased, which facilitates the operator to extract the DPF carrier 3; secondly, the reinforcing ribs 312 improve the overall strength between the holding hole 311 and the holding plate 313, and prevent the holding hole 311 and the holding plate 313 from being broken; finally, the holding plate 313 extends towards the air outlet direction, so that the blocking effect of the holding plate 313 on the air flow is reduced, and the condition that a large amount of ash carried by the air flow is accumulated on the surface of the holding plate 313 to influence the air flow circulation is avoided.

As shown in fig. 3, as a preferred embodiment of the present invention, the cylinder 1 is opened with a mounting hole 17 for mounting a sensor, and the mounting hole 17 is located between the DOC carrier 2 and the DPF carrier 3.

The mounting hole 17 is seted up to barrel 1 between DOC carrier 2 and DPF carrier 3, and temperature sensor or pressure sensor can be installed to mounting hole 17 to detect the air current temperature or the pressure that flow from DOC carrier 2, conveniently monitor aftertreatment system, conveniently know whether current air current reaches required temperature, carry out the efficiency of tail gas catalytic reduction reaction with guaranteeing the rear end air current.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the specification.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a vehicle aftertreatment device which characterized in that, includes barrel, DOC carrier and DPF carrier, the barrel has the inlet end and gives vent to anger the end, the barrel has first appearance chamber and second appearance chamber along the air current flow direction, the DOC carrier set up in first appearance chamber, the DPF carrier set up in the second holds the chamber, the DPF carrier is provided with the portion of gripping.

2. The vehicle aftertreatment device of claim 1, wherein the DOC carrier is a structure made of a metal material and is fixed to an inner wall of the first cavity.

3. The vehicle aftertreatment device of claim 1, wherein the barrel is further provided with an annular rib surrounding the outer periphery of the barrel and protruding towards the inside of the barrel to form a stop protrusion on the inner wall of the barrel and a groove on the outer wall of the barrel.

4. The vehicle aftertreatment device of claim 1, wherein the gas outlet end is provided with a first connection portion, and the DPF carrier is provided with a second connection portion capable of being engaged with the first connection portion in a stop manner.

5. The vehicle aftertreatment device of claim 4, further comprising a flow guide member having a flow guide cavity, the flow guide member being connected to the air outlet end of the barrel.

6. The vehicle aftertreatment device of claim 5, wherein the flow guide member has a first through hole and a second through hole, the first through hole is connected to the air outlet end of the cylinder body and used for air inflow, and the second through hole is used for air outflow.

7. The vehicle aftertreatment device of claim 5, wherein the baffle has a third connection portion, further comprising a clip that secures the first connection portion to a side of the second connection portion that is proximate to the air intake end, and the clip secures the third connection portion to a side of the second connection portion that is distal from the air intake end.

8. The vehicle aftertreatment device of claim 7, further comprising a gasket disposed between the first connection portion and the second connection portion and between the second connection portion and the third connection portion.

9. The vehicle aftertreatment device according to claim 1, wherein the grip portion has a grip hole and a grip plate, the grip hole has a rib on a side facing the air outlet direction, the rib is connected to the grip plate, and the grip plate extends in the air outlet direction.

10. The vehicle aftertreatment device of claim 1, wherein the cylinder defines mounting holes for mounting sensors, the mounting holes being located between the DOC substrate and the DPF substrate.