CN215860398U

CN215860398U - Tail gas aftertreatment encapsulation

Info

Publication number: CN215860398U
Application number: CN202121628876.2U
Authority: CN
Inventors: 李伟
Original assignee: Tenneco Suzhou Emission System Co Ltd
Current assignee: Tenneco Suzhou Emission System Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-02-18
Anticipated expiration: 2031-07-16

Abstract

An exhaust aftertreatment package includes an outer housing, a first aftertreatment component, and a second aftertreatment component. The first aftertreatment assembly includes a first housing and a first aftertreatment carrier encapsulated in the first housing. The outer shell comprises a barrel portion, and the barrel portion comprises an accommodating cavity. The second aftertreatment assembly includes a second housing and a diesel particulate trap enclosed within the second housing. The second housing includes a first end and a second end. The second aftertreatment component includes a seal that is sleeved over the second end. Compared with the prior art, the sealing element is positioned on one side far away from the first aftertreatment component, so that the stroke of the sealing element when the second aftertreatment component is installed in the cylinder body part is reduced, the friction between the sealing element and other parts is reduced, and the sealing effect of the exhaust aftertreatment package is improved.

Description

Tail gas aftertreatment encapsulation

Technical Field

The utility model relates to a tail gas aftertreatment package, and belongs to the technical field of engine tail gas aftertreatment.

Background

With the escalation of emissions regulations, some exhaust aftertreatment packages include diesel particulate traps. The diesel particulate trap is used for collecting particulate matters in the diesel exhaust, and when the particulate matters are collected to a certain degree, the diesel particulate trap needs to be cleaned, otherwise, the back pressure of the system can be seriously increased, and the normal operation of the system is not facilitated.

In the prior art, in order to facilitate the disassembly of the diesel particulate filter, some disassembly structures are designed, however, how to seal the installation position of the diesel particulate filter when the diesel particulate filter is installed in the exhaust aftertreatment package is a technical problem to be solved by technical personnel in the technical field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tail gas aftertreatment package with a good sealing effect.

In order to achieve the purpose, the utility model adopts the following technical scheme: an exhaust aftertreatment package comprising an outer housing, a first aftertreatment component located within the outer housing, and a second aftertreatment component located downstream of the first aftertreatment component; the first aftertreatment component comprises a first housing and a first aftertreatment carrier encapsulated in the first housing; the outer shell comprises a barrel body part, and the barrel body part comprises an accommodating cavity; the second aftertreatment component comprises a second shell and a diesel particle catcher, wherein the second shell is partially accommodated in the accommodating cavity, the diesel particle catcher is packaged in the second shell, and the outer shell is provided with an opening for detaching the second aftertreatment component; the second casing includes being close to the first end of first aftertreatment carrier and keeping away from the second end of first aftertreatment carrier, the barrel includes the protrusion that inwards protrudes into accept in the chamber and be used for fixing a position the first end, the second aftertreatment subassembly includes cup jointing the sealing member on the second end, the sealing member is sealed along circumference between first barrel with the second casing.

As a further improved technical solution of the present invention, the barrel portion is provided with a bell mouth for guiding the second housing to be inserted into the accommodating cavity.

As a further improved technical solution of the present invention, the second aftertreatment component further includes a fixed retainer ring sleeved on the second casing and used for preventing the sealing element from sliding out of the second casing from one side.

As a further improved technical solution of the present invention, the second aftertreatment assembly further includes a stop ring sleeved on the second casing and used for preventing the sealing element from sliding out of the second casing from the other side, and the sealing element is axially fixed between the fixed retaining ring and the stop ring.

As a further improved technical solution of the present invention, the second aftertreatment component further includes a connecting portion connected to the second casing and an end cap fixed to the connecting portion.

As a further improved technical solution of the present invention, the outer shell is provided with a first flange portion, the connecting portion is provided with a second flange portion, and the exhaust gas aftertreatment package further includes a clamp connecting the first flange portion and the second flange portion together.

As a further improved technical scheme of the utility model, the connecting part is provided with a plurality of airflow outlet holes so as to lead the tail gas flowing through the diesel particulate filter to flow out of the airflow outlet holes.

As a further improved technical scheme of the utility model, the sealing element is a sealing ring.

As a further improved technical solution of the present invention, the first aftertreatment support is a diesel oxidation catalyst, the first casing is accommodated in the accommodating cavity, and the first casing and the second casing are axially spaced apart from each other.

As a further improved technical solution of the present invention, the number of the protrusions is several, and the protrusions are distributed along the circumferential direction of the barrel portion, and each of the protrusions extends along the axial direction of the barrel portion.

Compared with the prior art, the sealing element is sleeved on the second end part, so that the sealing element is positioned on one side far away from the first aftertreatment component, the stroke of the sealing element when the second aftertreatment component is installed in the cylinder body part is reduced, the friction between the sealing element and other parts is reduced, the sealing effect of the exhaust aftertreatment package is improved, and particularly the sealing performance when the disassembled second aftertreatment component is installed in the cylinder body part is improved.

Drawings

FIG. 1 is a schematic perspective view of an exhaust aftertreatment package according to the utility model in one embodiment.

Fig. 2 is a partially exploded perspective view of fig. 1.

Fig. 3 is a schematic sectional view taken along line a-a in fig. 1.

Detailed Description

The following detailed description of the embodiments of the utility model will be described in conjunction with the accompanying drawings, in which, if there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers or symbols in different drawings represent the same or similar elements unless otherwise specified. The statements made in the following exemplary embodiments do not represent all embodiments of the present invention, but rather they are merely examples of products consistent with the present invention as recited in the claims of the present invention.

The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention. It should be understood that the use of terms such as "first," "second," and the like, in the description and in the claims of the present invention do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another.

Referring to fig. 1 to 3, the present invention discloses an exhaust gas aftertreatment package 100, which includes an outer casing 1, a first aftertreatment carrier assembly 2 located inside the outer casing 1, and a second aftertreatment assembly 3 located downstream of the first aftertreatment assembly 2. The outer housing 1 comprises a barrel 11 and an opening 12 for removal of the second aftertreatment component 3. The barrel 11 includes a receiving cavity 110 and a protrusion 112 protruding inward into the receiving cavity 110 for positioning the second aftertreatment component 3. In the illustrated embodiment of the present invention, the protrusions 112 are several and distributed along the circumferential direction of the barrel portion 11, and each of the protrusions 112 extends along the axial direction of the barrel portion 11. The first aftertreatment carrier assembly 2 and the second aftertreatment assembly 3 are at least partially received in the receiving cavity 110 and are spaced apart along the axial direction of the barrel 11.

In the illustrated embodiment of the utility model, the first aftertreatment assembly 2 includes a first housing 21 and a first aftertreatment carrier 22 enclosed in the first housing 21. The first aftertreatment support 22 is a Diesel Oxidation Catalyst (DOC).

The second aftertreatment component 3 includes a second housing 31 partially received in the receiving cavity 110 and a diesel particulate trap (DPF)32 enclosed within the second housing 31. The barrel 11 is provided with a bell mouth 111 for guiding the first housing 21 and the second housing 31 to be inserted into the receiving cavity 110. The first housing 21 and the second housing 31 are spaced apart from each other in the axial direction of the barrel 11 after being mounted in place.

The second housing 31 includes a first end 311 that is proximate to the first aftertreatment carrier 22 and a second end 312 that is distal to the first aftertreatment carrier 22. The protrusion 112 is used to position the first end 311. The second end 312 includes a fixed retaining ring 3121 fixed to the second housing 31.

The second aftertreatment assembly 3 includes a seal 33 that is sleeved over the second end 312. The sealing member 33 is a sealing ring. The seal 33 seals circumferentially between the first barrel portion 11 and the second housing 31. The fixing retainer 3121 is used to prevent the sealing member 33 from sliding out of the second housing 31 from one side. The second aftertreatment assembly 3 further comprises a stop ring 34 sleeved on the second casing 31 and used for preventing the sealing member 33 from sliding out of the second casing 31 from the other side. The seal 33 is axially fixed between the fixed retaining ring 3121 and the stop ring 34.

The second aftertreatment component 3 further comprises a connecting portion 35 connected to the second casing 31 and an end cap 36 fixed to the connecting portion 35. The connecting portion 35 is provided with a plurality of gas flow outlet holes 351 so that the exhaust gas flowing through the diesel particulate trap 32 flows out of the gas flow outlet holes 351.

The outer casing 1 is provided with a first flange part 13, the connecting part 35 is provided with a second flange part 352, and the exhaust gas aftertreatment package 100 further comprises a clamp 4 connecting the first flange part 13 and the second flange part 352 together, so as to detach the second aftertreatment component 3.

Compared with the prior art, the sealing element 33 of the present invention is sleeved on the second end 312, so that the sealing element 33 is located at a side far away from the first aftertreatment component 2, thereby reducing the stroke of the sealing element 33 when the second aftertreatment component 3 is installed in the barrel 11, reducing the friction between the sealing element 33 and other parts, improving the sealing effect of the exhaust aftertreatment package 100, and particularly improving the sealing performance when the disassembled second aftertreatment component 3 is installed in the barrel 11.

The above embodiments are only for illustrating the utility model and not for limiting the technical solutions described in the utility model, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the utility model in detail with reference to the above embodiments, the technical personnel in the field should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.

Claims

1. An exhaust aftertreatment package comprising an outer housing, a first aftertreatment component located within the outer housing, and a second aftertreatment component located downstream of the first aftertreatment component; the first aftertreatment component comprises a first housing and a first aftertreatment carrier encapsulated in the first housing; the outer shell comprises a barrel body part, and the barrel body part comprises an accommodating cavity; the second aftertreatment component comprises a second shell and a diesel particle catcher, wherein the second shell is partially accommodated in the accommodating cavity, the diesel particle catcher is packaged in the second shell, and the outer shell is provided with an opening for detaching the second aftertreatment component; the method is characterized in that: the second casing includes being close to the first end of first aftertreatment carrier and keeping away from the second end of first aftertreatment carrier, the barrel includes the protrusion that inwards protrudes into accept in the chamber and be used for fixing a position the first end, the second aftertreatment subassembly includes the sealing member that cup joints on the second end, the sealing member is sealed along circumference between the barrel with the second casing.

2. The exhaust aftertreatment package of claim 1, wherein: the barrel part is provided with a horn mouth for guiding the second shell to be inserted into the accommodating cavity.

3. The exhaust aftertreatment package of claim 1, wherein: the second aftertreatment component further comprises a fixed retainer ring sleeved on the second shell and used for preventing the sealing element from sliding out of the second shell from one side.

4. The exhaust aftertreatment package of claim 3, wherein: the second aftertreatment assembly further comprises a stop ring sleeved on the second shell and used for preventing the sealing element from sliding out of the second shell from the other side, and the sealing element is axially fixed between the fixed retainer ring and the stop ring.

5. The exhaust aftertreatment package of claim 1, wherein: the second aftertreatment component further comprises a connecting part connected with the second shell and an end cover fixed on the connecting part.

6. The exhaust aftertreatment package of claim 5, wherein: the shell body is equipped with first flange portion, connecting portion are equipped with second flange portion, tail gas aftertreatment encapsulation still includes with first flange portion with the clamp that second flange portion linked together.

7. The exhaust aftertreatment package of claim 5, wherein: the connecting part is provided with a plurality of airflow outlet holes so as to lead the tail gas flowing through the diesel particle catcher to flow out of the airflow outlet holes.

8. The exhaust aftertreatment package of claim 1, wherein: the sealing element is a sealing ring.

9. The exhaust aftertreatment package of claim 1, wherein: the first aftertreatment carrier is a diesel oxidation catalyst, the first shell is contained in the containing cavity, and the first shell and the second shell are arranged at intervals along the axial direction.

10. The exhaust aftertreatment package of claim 1, wherein: the protrusions are distributed along the circumferential direction of the barrel body, and each protrusion extends along the axial direction of the barrel body.