Exhaust gas aftertreatment device

Abstract

An exhaust gas aftertreatment device includes a housing, a carrier assembly, and insulation cotton. The housing includes a main body, a first flared portion extending outward from one end of the main body, and a second flared portion extending outward from the other end of the main body. The carrier assembly includes an encapsulation shell, a carrier encapsulated within the encapsulation shell, and a support tab fixed to the encapsulation shell. The encapsulation shell has a base, a fixing portion extending outward from one end of the base, and an extension portion extending from the other end of the base. The fixing portion is welded to the inner wall surface of the housing. The support tab is welded to the outer wall surface of the extension portion, and the support tab abuts against the inner wall surface of the housing. This invention, by providing the support tab, effectively positions one end of the carrier assembly relative to the housing, reducing welding and saving costs.

Description

Technical Field

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

[0002] Exhaust gas aftertreatment devices in related technologies typically include a housing and a carrier assembly welded and fixed within the housing. The carrier assembly includes an encapsulation shell and a carrier encapsulated within the encapsulation shell. The encapsulation shell is typically welded and fixed at both ends within the housing.

[0003] The exhaust gas aftertreatment device in the relevant technology involves many welding processes, resulting in high manufacturing costs. Utility Model Content

[0004] The purpose of this invention is to provide an exhaust gas aftertreatment device with an improved structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an exhaust gas aftertreatment device, comprising an outer shell, a carrier assembly located within the outer shell, and insulation cotton located between the outer shell and the carrier assembly; the outer shell comprises a main body, a first flared portion extending outward from one end of the main body, and a second flared portion extending outward from the other end of the main body; the carrier assembly comprises an encapsulation shell, a carrier encapsulated within the encapsulation shell, and a support protrusion fixed to the encapsulation shell; the encapsulation shell has a base, a fixing portion extending outward from one end of the base, and an extension portion extending from the other end of the base; the fixing portion is welded and fixed to the inner wall surface of the outer shell, and the support protrusion is welded and fixed to the outer wall surface of the extension portion, and the support protrusion abuts against the inner wall surface of the outer shell.

[0006] As a further improvement of this utility model, the fixing part is welded and fixed to one end of the main body, and the supporting protrusion abuts against the other end of the main body.

[0007] As a further improvement of this utility model, the fixing part is circumferentially welded to one end of the main body to ensure the airtightness between the fixing part and the main body.

[0008] As a further improvement of this utility model, the supporting tab is not welded to the main body.

[0009] As a further improvement of this utility model, the thermal insulation cotton is located between the fixing part and the supporting protrusion along the axial direction of the outer shell.

[0010] As a further improved technical solution of the present utility model, the carrier assembly further includes a gasket for encapsulating the carrier in the encapsulation housing.

[0011] As a further improved technical solution of the present utility model, the carrier is a diesel particulate filter carrier.

[0012] As a further improved technical solution of the present utility model, there are a plurality of the support tabs, which are arranged at intervals along the circumferential direction of the encapsulation housing.

[0013] As a further improved technical solution of the present utility model, the support tab is in a U-shape.

[0014] As a further improved technical solution of the present utility model, the carrier assembly further includes limiting tabs that are welded and fixed to the inner wall surface of the encapsulation housing and limit the carrier in the axial direction of the encapsulation housing. There are a plurality of the limiting tabs, which are arranged at intervals along the circumferential direction of the encapsulation housing.

[0015] Compared with the prior art, the exhaust gas aftertreatment device of the present utility model includes a carrier assembly. The carrier assembly includes an encapsulation housing, a carrier encapsulated in the encapsulation housing, and support tabs fixed to the encapsulation housing. The encapsulation housing has a base portion, a fixing portion formed by expanding the diameter outward from one end of the base portion, and an extension portion extending from the other end of the base portion. The fixing portion is welded and fixed to the inner wall surface of the outer housing, the support tabs are welded and fixed to the outer wall surface of the extension portion, and the support tabs abut against the inner wall surface of the outer housing. By providing the support tabs, the present utility model effectively realizes the positioning of one end of the carrier assembly with the outer housing, reduces welding, and saves costs. Description of the Drawings

[0016] Figure 1 is a three-dimensional schematic view of the exhaust gas aftertreatment device of the present utility model in one embodiment.

[0017] Figure 2 is Figure 1 the left view of

[0018] Figure 3 is the sectional schematic view along the line A-A in Figure 2 above.

[0019] Figure 4 is the three-dimensional exploded view of the exhaust gas aftertreatment device of the present utility model in one embodiment.

[0020] Figure 5 is the three-dimensional schematic view of a support tab of the exhaust gas aftertreatment device of the present utility model. Detailed Embodiments

[0021] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Where several specific embodiments exist, features in these embodiments can be combined with each other without conflict. When the description relates to the drawings, unless otherwise stated, the same numbers or symbols in different drawings represent the same or similar elements. The content described in the following exemplary embodiments does not represent all embodiments of this utility model; rather, they are merely examples of products consistent with this utility model and as described in the claims.

[0022] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the scope of protection of this invention. It should be understood that terms such as "first," "second," and similar words used in the specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish the features.

[0023] Please refer to Figures 1 to 5 As shown, this utility model discloses an exhaust gas aftertreatment device 100, which includes an outer shell 1, a carrier assembly 2 located in the outer shell 1, and thermal insulation cotton 3 located between the outer shell 1 and the carrier assembly 2.

[0024] The outer casing 1 includes a main body 11, a first flared portion 12 formed by expanding outward from one end of the main body 11, and a second flared portion 13 formed by expanding outward from the other end of the main body 11. The first flared portion 12 and the second flared portion 13 are used to be detachably connected to adjacent casings.

[0025] The carrier assembly 2 includes a packaging shell 4, a carrier 5 encapsulated in the packaging shell 4, a support tab 6 fixed to the packaging shell 4, and a limiting tab 7 fixed to the packaging shell 4.

[0026] The encapsulation housing 4 has a base 41, a fixing part 42 that expands outward from one end of the base 41, and an extension part 43 that extends from the other end of the base 41. The fixing part 42 is welded and fixed to the inner wall surface of the outer housing 1. The supporting tab 6 is welded and fixed to the outer wall surface of the extension part 43, and the supporting tab 6 abuts against the inner wall surface of the outer housing 1.

[0027] In the embodiment illustrated in this utility model, the fixing part 42 is welded and fixed to one end of the main body part 11. Specifically, the fixing part 42 is circumferentially welded to one end of the main body part 11 to ensure the airtightness between the fixing part 42 and the main body part 11, and to prevent airflow from passing through the gap between the fixing part 42 and the main body part 11.

[0028] The support tab 6 abuts against the other end of the main body 11. The support tab 6 is not welded to the main body 11, thereby saving welding costs.

[0029] The insulation cotton 3 is located between the fixing part 42 and the supporting protrusion 6 along the axial direction of the outer shell 1.

[0030] In the embodiment illustrated in this utility model, the carrier assembly 2 further includes a gasket 8 that encapsulates the carrier 5 within the encapsulation housing 4. In the embodiment illustrated in this utility model, the carrier 5 is a diesel particulate filter carrier (DPF carrier).

[0031] In the embodiment illustrated in this utility model, there are several supporting tabs 6 arranged at intervals along the circumference of the encapsulation housing 4. The supporting tabs 6 are in the shape of a "Z" (or "U").

[0032] The limiting protrusion 7 is welded and fixed to the inner wall surface of the packaging shell 4 and limits the carrier 5 along the axial direction of the packaging shell 4 to prevent the carrier 5 from moving. In the embodiment illustrated in this utility model, there are several limiting protrusions 7 arranged at intervals along the circumference of the packaging shell 4.

[0033] Compared to existing technologies, the exhaust gas aftertreatment device 100 of this utility model includes a carrier assembly 2. The carrier assembly 2 includes a housing 4, a carrier 5 encapsulated in the housing 4, and a support protrusion 6 fixed to the housing 4. The housing 4 has a base 41, a fixing part 42 extending outward from one end of the base 41, and an extension part 43 extending from the other end of the base 41. The fixing part 42 is welded to the inner wall surface of the housing 1, and the support protrusion 6 is welded to the outer wall surface of the extension part 43, and the support protrusion 6 abuts against the inner wall surface of the housing 1. By setting the support protrusion 6, this utility model effectively achieves the positioning of one end of the carrier assembly 2 with the housing 1, reduces welding, and saves costs.

[0034] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. An exhaust gas aftertreatment device, characterized in that It includes an outer housing, a carrier assembly located in the outer housing, and a heat-insulating cotton located between the outer housing and the carrier assembly; the outer housing includes a main body portion, a first flared portion formed by expanding the diameter outward from one end of the main body portion, and a second flared portion formed by expanding the diameter outward from the other end of the main body portion; the carrier assembly includes a packaging housing, a carrier encapsulated in the packaging housing, and a support tab fixed to the packaging housing, the packaging housing is provided with a base portion, a fixing portion formed by expanding the diameter outward from one end of the base portion, and an extending portion extending from the other end of the base portion, the fixing portion is welded and fixed to the inner wall surface of the outer housing, the support tab is welded and fixed to the outer wall surface of the extending portion, and the support tab abuts against the inner wall surface of the outer housing.

2. The exhaust gas aftertreatment device of claim 1, wherein: The fixing portion is welded and fixed to one end of the main body portion, and the support tab abuts against the other end of the main body portion.

3. The exhaust gas aftertreatment device of claim 2, wherein: The fixing portion is circumferentially welded to one end of the main body portion to ensure the airtightness between the fixing portion and the main body portion.

4. The exhaust gas aftertreatment device of claim 1, wherein: The support tab is not welded and fixed to the main body portion.

5. The exhaust gas aftertreatment device of claim 1, wherein: The heat-insulating cotton is located between the fixing portion and the support tab in the axial direction of the outer housing.

6. The exhaust gas aftertreatment device of claim 1, wherein: The carrier assembly further includes a gasket for encapsulating the carrier in the packaging housing.

7. The exhaust gas aftertreatment device of claim 1, wherein: The carrier is a diesel particulate filter carrier.

8. The exhaust gas aftertreatment device of any one of claims 1 to 7, wherein: There are several support tabs and they are arranged at intervals along the circumferential direction of the packaging housing.

9. The exhaust gas aftertreatment device of claim 8, wherein: The support tab is in a C-shape.

10. The exhaust gas aftertreatment device of claim 8, wherein: The carrier assembly further includes a limiting tab welded and fixed to the inner wall surface of the packaging housing and limiting the carrier in the axial direction of the packaging housing, and there are several limiting tabs and they are arranged at intervals along the circumferential direction of the packaging housing.

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