Thermal shell assembly

Abstract

An insulation shell assembly includes a first insulation shell and a second insulation shell. The first insulation shell has a first stamped portion and a second stamped portion. The second insulation shell has a third stamped portion and a fourth stamped portion. The first and third stamped portions are welded to an inner shell. The second and fourth stamped portions are also welded to the inner shell. The first insulation shell further has a first overlapping portion and a second overlapping portion. The second insulation shell further has a third overlapping portion and a fourth overlapping portion. The first, second, third, and fourth overlapping portions are not stamped. The first and third overlapping portions correspond to and are welded to each other, and the second and fourth overlapping portions correspond to and are welded to each other. This invention avoids the use of an integral stamping solution for the first and second insulation shells, saving costs.

Description

Technical Field

[0001] This utility model relates to a heat insulation shell assembly, belonging to the field of engine exhaust aftertreatment technology. Background Technology

[0002] Please combine Figure 1 As shown, the thermal insulation shell assembly 100' in the related art includes an arc-shaped first thermal insulation shell 1' and an arc-shaped second thermal insulation shell 2', wherein the first thermal insulation shell 1' is provided with a first stamping part 11' located on one side of the first thermal insulation shell 1' along the axial direction of the thermal insulation shell assembly 100', a second stamping part 12' located on the other side of the first thermal insulation shell 1' along the axial direction of the thermal insulation shell assembly 100', and a first flanged part 13' along the circumference of the thermal insulation shell assembly 100'.

[0003] Similarly, the second insulation shell 2' is provided with a third stamped portion 21' located on one side of the second insulation shell 2' along the axial direction of the insulation shell assembly 100', a fourth stamped portion 22' located on the other side of the second insulation shell 2' along the axial direction of the insulation shell assembly 100', and a second flanged portion (not shown) along the circumferential direction of the insulation shell assembly 100'. The first stamped portion 11' corresponds to the third stamped portion 21', and the first stamped portion 11' and the third stamped portion 21' are used to weld and fix to the inner shell 3'. The second stamped portion 12' corresponds to the fourth stamped portion 22', and the second stamped portion 12' and the fourth stamped portion 22' are used to weld and fix to the inner shell 3'. The first flanged portion 13' and the second flanged portion 23' are both used to weld and fix to the inner shell 3'.

[0004] However, regarding the first insulation shell 1', the first stamping part 11', the second stamping part 12', and the first flange part 13' in the related technology are all stamped. This design requires the use of an integral stamping scheme, resulting in higher manufacturing costs. Utility Model Content

[0005] The purpose of this invention is to provide a thermal insulation shell assembly with an improved structure and lower manufacturing cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a heat-insulating shell assembly for use in an exhaust gas aftertreatment device, the heat-insulating shell assembly comprising an arc-shaped first heat-insulating shell and an arc-shaped second heat-insulating shell, wherein the first heat-insulating shell is provided with a first stamped portion located on one side of the first heat-insulating shell along the axial direction of the heat-insulating shell assembly and a second stamped portion located on the other side of the first heat-insulating shell along the axial direction of the heat-insulating shell assembly; the second heat-insulating shell is provided with a third stamped portion located on one side of the second heat-insulating shell along the axial direction of the heat-insulating shell assembly and a fourth stamped portion located on the other side of the second heat-insulating shell along the axial direction of the heat-insulating shell assembly; the first stamped portion and the third stamped portion correspond to each other, and the first stamped portion and the third stamped portion are used to weld and fix to the inner shell; the second stamped portion and the fourth stamped portion... Corresponding to the stamping portion, the second stamping portion and the fourth stamping portion are used to weld and fix to the inner shell; the first insulation shell is also provided with a first overlapping portion located at one end of the first insulation shell along the circumference of the insulation shell assembly and a second overlapping portion located at the other end of the first insulation shell along the circumference of the insulation shell assembly; the second insulation shell is also provided with a third overlapping portion located at one end of the second insulation shell along the circumference of the insulation shell assembly and a fourth overlapping portion located at the other end of the second insulation shell along the circumference of the insulation shell assembly; the first overlapping portion, the second overlapping portion, the third overlapping portion and the fourth overlapping portion are not stamped; the first overlapping portion and the third overlapping portion correspond to each other and are welded and fixed to each other, and the second overlapping portion and the fourth overlapping portion correspond to each other and are welded and fixed to each other.

[0007] As a further improvement of the present invention, the first overlapping portion is provided with a first notch, a first protruding portion located on one side of the first notch, and a second protruding portion located on the other side of the first notch; the first protruding portion and the second protruding portion overlap on the third overlapping portion.

[0008] As a further improvement of the present invention, the first protruding portion and the second protruding portion at least partially cover the third overlapping portion, and both the first protruding portion and the second protruding portion are welded and fixed to the third overlapping portion.

[0009] As a further improvement of the present invention, the fourth overlapping portion is provided with a second recess, a third protruding portion located on one side of the second recess, and a fourth protruding portion located on the other side of the second recess; the third protruding portion and the fourth protruding portion overlap on the second overlapping portion.

[0010] As a further improvement of the present invention, the third protruding portion and the fourth protruding portion at least partially cover the second overlapping portion, and both the third protruding portion and the fourth protruding portion are welded and fixed to the second overlapping portion.

[0011] As a further improvement of this utility model, the second overlapping part is straight and does not have a notch.

[0012] As a further improvement of this utility model, the third overlapping part is straight and has no notch.

[0013] As a further improvement of the present invention, the heat insulation shell assembly further includes heat insulation cotton, which is disposed between the first heat insulation shell and the inner shell, and the heat insulation cotton is disposed between the second heat insulation shell and the inner shell.

[0014] Compared to existing technologies, the insulation shell assembly of this utility model includes a first insulation shell and a second insulation shell, wherein the first overlapping portion, the second overlapping portion, the third overlapping portion, and the fourth overlapping portion are not stamped. This design allows the first insulation shell to be manufactured using segmented stamping of the first stamped portion and the second stamped portion, thus avoiding the need for a single-piece stamping method and saving costs. The manufacturing method of the second insulation shell is the same as that of the first insulation shell, further reducing costs. Furthermore, this design is not sensitive to the length of the first and second insulation shells, allowing the relevant stamping dies to be shared. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the insulation shell assembly installed on the inner shell in the relevant technology.

[0016] Figure 2 This is a three-dimensional schematic diagram of the heat-insulating shell assembly of this utility model installed on the inner shell.

[0017] Figure 3 This is a three-dimensional schematic diagram of the first insulation shell.

[0018] Figure 4 This is a three-dimensional schematic diagram of the second insulation shell. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] Please refer to Figures 2 to 4 As shown, this utility model discloses a thermal insulation shell assembly 100 for use in an exhaust gas aftertreatment device. The thermal insulation shell assembly 100 includes an arc-shaped first thermal insulation shell 1 and an arc-shaped second thermal insulation shell 2. Both the first thermal insulation shell 1 and the second thermal insulation shell 2 are welded and fixed to an inner shell 3. Preferably, the thermal insulation shell assembly 100 further includes thermal insulation cotton (not shown), which is disposed between the first thermal insulation shell 1 and the inner shell 3, and also between the second thermal insulation shell 2 and the inner shell 3.

[0022] The first insulation shell 1 is provided with a first stamped portion 11 located on one side of the first insulation shell 1 along the axial direction of the insulation shell assembly 100 and a second stamped portion 12 located on the other side of the first insulation shell 1 along the axial direction of the insulation shell assembly 100. The first insulation shell 1 is also provided with a first overlapping portion 13 located at one end of the first insulation shell 1 along the circumferential direction of the insulation shell assembly 100 and a second overlapping portion 14 located at the other end of the first insulation shell 1 along the circumferential direction of the insulation shell assembly 100.

[0023] The second insulation shell 2 is provided with a third stamped portion 21 located on one side of the second insulation shell 2 along the axial direction of the insulation shell assembly 100, and a fourth stamped portion 22 located on the other side of the second insulation shell 2 along the axial direction of the insulation shell assembly 100. The second insulation shell 2 is also provided with a third overlapping portion 23 located at one end of the second insulation shell 2 along the circumferential direction of the insulation shell assembly 100, and a fourth overlapping portion 24 located at the other end of the second insulation shell 2 along the circumferential direction of the insulation shell assembly 100.

[0024] The first stamping part 11 corresponds to the third stamping part 21, and the first stamping part 11 and the third stamping part 21 are used to weld and fix to the inner housing 3. The second stamping part 12 corresponds to the fourth stamping part 22, and the second stamping part 12 and the fourth stamping part 22 are used to weld and fix to the inner housing 3.

[0025] The first overlapping portion 13, the second overlapping portion 14, the third overlapping portion 23, and the fourth overlapping portion 24 are not stamped. The first overlapping portion 13 corresponds to the third overlapping portion 23 and is welded to each other, and the second overlapping portion 14 corresponds to the fourth overlapping portion 24 and is welded to each other.

[0026] In the embodiment illustrated in this utility model, the first overlapping portion 13 is provided with a first recess 131, a first protruding portion 132 located on one side of the first recess 131, and a second protruding portion 133 located on the other side of the first recess 131. The first protruding portion 132 and the second protruding portion 133 overlap the third overlapping portion 23. The first protruding portion 132 and the second protruding portion 133 at least partially cover the third overlapping portion 23, and both the first protruding portion 132 and the second protruding portion 133 are welded and fixed to the third overlapping portion 23.

[0027] Similarly, the fourth overlapping portion 24 is provided with a second recess 241, a third protruding portion 242 located on one side of the second recess 241, and a fourth protruding portion 243 located on the other side of the second recess 241; the third protruding portion 242 and the fourth protruding portion 243 overlap the second overlapping portion 14. The third protruding portion 242 and the fourth protruding portion 243 at least partially cover the second overlapping portion 14, and both the third protruding portion 242 and the fourth protruding portion 243 are welded and fixed to the second overlapping portion 14.

[0028] In the embodiment illustrated in this utility model, the second overlapping portion 14 is straight and has no notch; the third overlapping portion is straight and has no notch.

[0029] Compared to existing technologies, the thermal insulation shell assembly 100 of this invention includes a first thermal insulation shell 1 and a second thermal insulation shell 2. The first overlapping portion 13, the second overlapping portion 14, the third overlapping portion 23, and the fourth overlapping portion 24 are all not stamped. This design allows the first thermal insulation shell 1 to be manufactured using segmented stamping of the first stamped portion 11 and the second stamped portion 12, thus avoiding the need for an integral stamping solution and saving costs. The manufacturing method of the second thermal insulation shell 2 is the same as that of the first thermal insulation shell 1, further reducing costs. Furthermore, this design is not sensitive to the length of the first thermal insulation shell 1 and the second thermal insulation shell 2, allowing the relevant stamping dies to be shared.

[0030] 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. A heat-insulating shell assembly for use in an exhaust gas aftertreatment device, characterized in that: The insulation shell assembly includes an arc-shaped first insulation shell and an arc-shaped second insulation shell. The first insulation shell has a first stamped portion located on one side of the first insulation shell along the axial direction of the insulation shell assembly and a second stamped portion located on the other side of the first insulation shell along the axial direction of the insulation shell assembly. The second insulation shell has a third stamped portion located on one side of the second insulation shell along the axial direction of the insulation shell assembly and a fourth stamped portion located on the other side of the second insulation shell along the axial direction of the insulation shell assembly. The first stamped portion corresponds to the third stamped portion and is welded to the inner shell. The second stamped portion corresponds to the fourth stamped portion and is welded to the inner shell. The stamped portion is used for welding and fixing to the inner shell; the first insulation shell is also provided with a first overlapping portion located at one end of the first insulation shell along the circumference of the insulation shell assembly and a second overlapping portion located at the other end of the first insulation shell along the circumference of the insulation shell assembly; the second insulation shell is also provided with a third overlapping portion located at one end of the second insulation shell along the circumference of the insulation shell assembly and a fourth overlapping portion located at the other end of the second insulation shell along the circumference of the insulation shell assembly; the first overlapping portion, the second overlapping portion, the third overlapping portion and the fourth overlapping portion are not stamped; the first overlapping portion and the third overlapping portion correspond to each other and are welded and fixed to each other, and the second overlapping portion and the fourth overlapping portion correspond to each other and are welded and fixed to each other.

2. The thermal insulation shell assembly as described in claim 1, characterized in that: The first overlapping portion has a first notch, a first protruding portion located on one side of the first notch, and a second protruding portion located on the other side of the first notch; the first protruding portion and the second protruding portion overlap on the third overlapping portion.

3. The thermal insulation shell assembly as described in claim 2, characterized in that: The first tab portion and the second tab portion at least partially cover the third overlapping portion, and both the first tab portion and the second tab portion are welded and fixed to the third overlapping portion.

4. The thermal insulation shell assembly as described in claim 3, characterized in that: The fourth overlapping portion is provided with a second notch, a third protruding portion located on one side of the second notch, and a fourth protruding portion located on the other side of the second notch; the third protruding portion and the fourth protruding portion overlap on the second overlapping portion.

5. The thermal insulation shell assembly as described in claim 4, characterized in that: The third and fourth protruding portions at least partially cover the second overlapping portion, and both the third and fourth protruding portions are welded and fixed to the second overlapping portion.

6. The thermal insulation shell assembly as described in claim 5, characterized in that: The second overlapping part is straight and has no notch.

7. The thermal insulation shell assembly as described in claim 5, characterized in that: The third overlapping part is straight and has no notch.

8. The thermal insulation shell assembly as described in claim 1, characterized in that: The insulation shell assembly also includes insulation cotton, which is disposed between the first insulation shell and the inner shell, and the insulation cotton is disposed between the second insulation shell and the inner shell.

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