Tail gas after-treatment shell assembly

Abstract

A tail gas after-treatment shell assembly comprises an inner shell, a cone fixed to the inner shell, a shell heat insulation cover at least partially wrapping the inner shell and a cone heat insulation cover at least partially wrapping the cone, and the inner shell is used for packaging a tail gas after-treatment carrier; the shell heat shield comprises a first welding claw, a first open groove and a second open groove, wherein the first open groove is located in one side of the first welding claw and communicates with the first welding claw, and the second open groove is located in the other side of the first welding claw and communicates with the first welding claw. The first welding claw comprises a first welding part and a first telescopic part close to the first welding part, the first welding part is used for being welded to the cone and / or the cone heat insulation cover, and the first telescopic part can stretch out and draw back in the axial direction of the inner shell so as to absorb thermal deformation.

Description

Technical Field

[0001] The utility model relates to an exhaust gas aftertreatment housing component, belonging to the technical field of engine exhaust gas aftertreatment. Background Art

[0002] The exhaust gas after-treatment housing assembly in the related art usually includes a plurality of heat shields welded together. When the exhaust gas after-treatment housing assembly works under high temperature conditions, the heat shields are prone to deformation, cracking, or even failure. Utility Model Content

[0003] The utility model aims to provide an exhaust gas after-treatment housing component with high reliability.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an exhaust gas after-treatment shell assembly, which includes an inner shell, a cone fixed to the inner shell, a shell heat insulation cover at least partially covering the inner shell, and a cone heat insulation cover at least partially covering the cone, wherein the inner shell is used to encapsulate the exhaust gas after-treatment carrier; the shell heat insulation cover includes a first welding claw, a first groove located on one side of the first welding claw and connected to the first welding claw, and a second groove located on the other side of the first welding claw and connected to the first welding claw; the first welding claw includes a first welding portion and a first telescopic portion close to the first welding portion, the first welding portion is used to be welded to the cone and / or the cone heat insulation cover, and the first telescopic portion can be telescoped along the axial direction of the inner shell to absorb thermal deformation.

[0005] As a further improved technical solution of the present utility model, the first welding portion is welded to the cone heat insulation cover.

[0006] As a further improved technical solution of the utility model, before the first welding portion is welded to the cone heat insulation cover, the first welding portion is provided with a crimping portion crimped onto the cone heat insulation cover.

[0007] As a further improved technical solution of the present invention, the first telescopic portion is a first raised portion formed by stamping on the first welding claw.

[0008] As a further improved technical solution of the utility model, the shell heat insulation cover includes a first heat insulation cover and a second heat insulation cover, the first welding claw, the first groove and the second groove are all arranged on the first heat insulation cover; the first heat insulation cover and the second heat insulation cover are welded and fixed to the inner shell.

[0009] As a further improved technical solution of the utility model, the cone is an air intake cone.

[0010] As a further improved technical solution of the utility model, the cone heat insulation cover includes a second welding claw, a third slot located on one side of the second welding claw and connected to the second welding claw, and a fourth slot located on the other side of the second welding claw and connected to the second welding claw; the second welding claw includes a second welding portion and a second telescopic portion close to the second welding portion, the second welding portion is used to be welded to the cone, and the second telescopic portion can be telescoped along the axial direction of the inner shell to absorb thermal deformation.

[0011] As a further improved technical solution of the present invention, the second telescopic portion is a second raised portion formed by stamping on the second welding claw.

[0012] As a further improved technical solution of the utility model, the shell heat insulation cover includes a first pressing plane, and the first welding claw is located in the area where the first pressing plane is located.

[0013] As a further improved technical solution of the present invention, the conical heat insulation cover includes a second pressing plane, and the second welding claws are located in the area where the second pressing plane is located.

[0014] Compared with the prior art, the shell heat shield of the utility model includes a first welding claw, a first slot located on one side of the first welding claw and connected to the first welding claw, and a second slot located on the other side of the first welding claw and connected to the first welding claw; the first welding claw includes a first welding portion and a first telescopic portion close to the first welding portion, the first welding portion is used to weld to the cone and / or the cone heat shield, and the first telescopic portion can be telescoped along the axial direction of the inner shell to absorb thermal deformation. Such a configuration improves the reliability of the shell heat shield of the exhaust gas aftertreatment shell assembly and reduces the risk of failure thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional exploded view of an exhaust gas aftertreatment housing assembly of the utility model in one embodiment.

[0016] Figure 2 yes Figure 1 A partial enlarged view of the circled portion A in FIG.

[0017] Figure 3 yes Figure 1 A partial enlarged view of the circled portion B in FIG.

[0018] Figure 4 It is a top view of the exhaust gas aftertreatment housing assembly of the utility model in one embodiment.

[0019] Figure 5 is along Figure 4Schematic diagram of the partial section of the CC line.

[0020] Figure 6 yes Figure 4 Top view after rotating at a certain angle.

[0021] Figure 7 is along Figure 6 Schematic diagram of the local section of the DD line.

[0022] Figure 8 yes Figure 4 main view. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. If there are several specific embodiments, the features of these embodiments can be combined with each other without conflict. When the description involves the drawings, unless otherwise specified, the same numbers or symbols in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments of the present invention. On the contrary, they are only examples of products consistent with the present invention as recorded in the claims of the present invention.

[0024] The terms used in the present invention are only for the purpose of describing specific implementations and are not intended to limit the scope of protection of the present invention. It should be understood that the terms such as "first", "second" and similar terms used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish the names of features.

[0025] Please refer to Figures 1 to 8 As shown, the utility model discloses an exhaust gas after-treatment shell assembly, which includes an inner shell 1, a cone 2 fixed to the inner shell 1, a shell heat insulation cover 3 at least partially covering the inner shell 1, and a cone heat insulation cover 4 at least partially covering the cone 2, wherein the inner shell 1 is used to encapsulate an exhaust gas after-treatment carrier (such as a diesel oxidation catalyst carrier, a diesel particulate filter carrier, a selective catalytic reducer carrier, etc.).

[0026] The shell heat shield 3 includes a first welding claw 30, a first slot 31 located at one side of the first welding claw 30 and connected to the first welding claw 30, and a second slot 32 located at the other side of the first welding claw 30 and connected to the first welding claw 30. In other words, the first welding claw 30 is located between the first slot 31 and the second slot 32. The first welding claw 30 itself is similar to a cantilever beam structure, which has a certain elasticity.

[0027] In the illustrated embodiment of the present invention, the first welding claw 30 includes a first pressing plane 304, a first welding portion 301, a first telescopic portion 302 close to the first welding portion 301, and a crimping portion 303. The first welding portion 301 is used to be welded to the cone 2 and / or the cone heat shield 4, and the first telescopic portion 302 can be telescoped along the axial direction of the inner shell 1 to absorb thermal deformation.

[0028] In the illustrated embodiment of the present invention, the first welding portion 301 is welded to the cone heat insulation cover 4 .

[0029] Before the first welding portion 301 is welded to the cone 2 and the cone heat insulation cover 4 , the crimping portion 303 is pressed and crimped onto the cone heat insulation cover 4 .

[0030] The first telescopic portion 302 is a first raised portion formed by stamping on the first welding claw 30. Those skilled in the art will appreciate that when the first raised portion is stretched along the axial direction of the inner housing 1, the first telescopic portion 302 can be deformed to a certain extent along the axial direction of the inner housing 1. Such deformation can reduce the risk of fatigue failure of the first welding claw 30 at high temperatures.

[0031] In the illustrated embodiment of the present invention, the shell heat insulation cover 3 includes a first heat insulation cover 3a and a second heat insulation cover 3b, the first welding claw 30, the first groove 31 and the second groove 32 are all provided on the first heat insulation cover 3a; the first heat insulation cover 3a and the second heat insulation cover 3b are welded and fixed to the inner shell 1.

[0032] In the illustrated embodiment of the present invention, the cone 2 is an air intake cone.

[0033] The cone heat shield 4 includes a second welding claw 40, a third slot 41 located at one side of the second welding claw 40 and connected to the second welding claw 40, and a fourth slot 42 located at the other side of the second welding claw 40 and connected to the second welding claw 40. In other words, the second welding claw 40 is located between the third slot 41 and the fourth slot 42. The second welding claw 40 includes a second pressing plane 403, a second welding portion 401, and a second telescopic portion 402 close to the second welding portion 401, the second welding portion 401 is used to be welded to the cone 2, and the second telescopic portion 402 can be telescoped along the axial direction of the inner shell 1 to absorb thermal deformation.

[0034] The second telescopic portion 402 is a second raised portion formed by stamping on the second welding claw 40. Those skilled in the art will appreciate that when the second raised portion is stretched along the axial direction of the inner housing 1, the second telescopic portion 402 can be deformed to a certain extent along the axial direction of the inner housing 1. Such deformation can reduce the risk of fatigue failure of the second welding claw 40 at high temperatures.

[0035] The above embodiments are only used to illustrate the present invention but not to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technicians in the relevant technical field. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An exhaust gas aftertreatment housing assembly, characterized in that: It includes an inner shell, a cone fixed to the inner shell, a shell heat insulation cover at least partially covering the inner shell, and a cone heat insulation cover at least partially covering the cone, wherein the inner shell is used to encapsulate an exhaust gas after-treatment carrier; the shell heat insulation cover includes a first welding claw, a first slot located on one side of the first welding claw and connected to the first welding claw, and a second slot located on the other side of the first welding claw and connected to the first welding claw; the first welding claw includes a first welding portion and a first telescopic portion close to the first welding portion, the first welding portion is used to be welded to the cone and / or the cone heat insulation cover, and the first telescopic portion can be telescoped along the axial direction of the inner shell to absorb thermal deformation.

2. The exhaust gas aftertreatment housing assembly according to claim 1, characterized in that: The first welding portion is welded to the cone heat shield.

3. The exhaust gas aftertreatment housing assembly according to claim 2, characterized in that: Before the first welding portion is welded to the cone heat insulation cover, the first welding portion is provided with a crimping portion crimped onto the cone heat insulation cover.

4. The exhaust gas aftertreatment housing assembly according to claim 1, characterized in that: The first expansion and contraction portion is a first protrusion formed by punching on the first welding claw.

5. The exhaust gas aftertreatment housing assembly according to claim 1, characterized in that: The shell heat insulation cover includes a first heat insulation cover and a second heat insulation cover. The first welding claw, the first slot and the second slot are all arranged on the first heat insulation cover. The first heat insulation cover and the second heat insulation cover are welded and fixed to the inner shell.

6. The exhaust gas aftertreatment housing assembly according to claim 1, characterized in that: The cone is an air intake cone.

7. The exhaust gas aftertreatment housing assembly according to claim 1, characterized in that: The cone heat insulation cover includes a second welding claw, a third slot located on one side of the second welding claw and connected to the second welding claw, and a fourth slot located on the other side of the second welding claw and connected to the second welding claw; the second welding claw includes a second welding portion and a second telescopic portion close to the second welding portion, the second welding portion is used to be welded to the cone, and the second telescopic portion can be telescoped along the axial direction of the inner shell to absorb thermal deformation.

8. The exhaust gas aftertreatment housing assembly according to claim 7, characterized in that: The second expansion and contraction portion is a second protrusion formed by punching on the second welding claw.

9. The exhaust gas aftertreatment housing assembly according to claim 1, characterized in that: The housing heat insulation cover comprises a first pressing plane, and the first welding claw is located in the area where the first pressing plane is located.

10. The exhaust gas aftertreatment housing assembly according to claim 7, characterized in that: The cone heat shield comprises a second pressing plane, and the second welding claws are located in the area where the second pressing plane is located.

Images