Air inlet cone assembly

Abstract

A gas inlet cone assembly is used on a tail gas after-treatment device and comprises an inner metal shell, an outer metal shell and heat insulation cotton clamped between the inner metal shell and the outer metal shell. The outer metal shell is provided with a first main body part; and the inner metal shell is provided with a second main body part. And the first main body part and the second main body part are fixed together in a plug welding manner. By means of the arrangement, the air inlet cone assembly has the advantages that the structural rigidity is improved, the modal frequency is improved, and the problems of resonance and noise are effectively avoided.

Description

Technical Field

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

[0002] Related technologies include exhaust aftertreatment devices that include an intake cone assembly for introducing exhaust gases from a vehicle engine into the exhaust aftertreatment device and treating the exhaust gases through various catalytic converters installed in the exhaust aftertreatment device to meet emission regulations.

[0003] Intake cone assemblies in related technologies typically include an inner housing, an outer housing, and thermal insulation. Because these intake cone assemblies are located near the exhaust system, they are significantly affected by engine airflow pulse excitation, especially in in-cylinder braking engines where noise issues are easily generated. When the stiffness and modal characteristics of the intake cone assembly are low, it is prone to resonance under pulse excitation, leading to excessive noise levels.

[0004] Therefore, it is necessary to optimize the design of the intake cone assembly in the relevant technology. Utility Model Content

[0005] The purpose of this invention is to provide an intake cone assembly with good structural rigidity.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an intake cone assembly for use in an exhaust gas aftertreatment device, the intake cone assembly comprising an inner metal shell, an outer metal shell, and heat insulation cotton sandwiched between the inner metal shell and the outer metal shell, the outer metal shell having a first main body portion, the inner metal shell having a second main body portion, the first main body portion and the second main body portion being fixed together by plug welding.

[0007] As a further improvement of the present invention, the first main body includes a first recessed portion located in the middle and a first surrounding portion surrounding the periphery of the first recessed portion.

[0008] As a further improvement of the present invention, the first recess is provided with at least one first plug welding hole, and the second main body is exposed in the first plug welding hole;

[0009] During plug welding, the solder fills the first plug welding hole and is fixed to the second main body.

[0010] As a further improvement of the present invention, the first plug welding hole is multiple and is arranged at radial intervals along the first recess.

[0011] As a further improvement of the present invention, the first recessed portion is provided with a first concave rib that is further recessed from the main body of the first recessed portion, and the first plug welding hole is located in the first concave rib.

[0012] As a further improvement of this utility model, the air intake cone assembly is provided with an air intake port, and the axis of the air intake port is perpendicular to the extension direction of the first concave rib.

[0013] As a further improvement of the present invention, the first surrounding portion is provided with at least one second plug welding hole, and the second main body portion is exposed in the second plug welding hole;

[0014] During plug welding, the solder fills the second plug welding hole and is fixed to the second main body.

[0015] As a further improvement of this utility model, the second plug welding hole is multiple and is arranged at intervals along the circumference of the first surrounding portion.

[0016] As a further improvement of the present invention, the first surrounding portion is provided with a second concave rib that is further recessed from the main body of the first surrounding portion, and the second plug welding hole is located in the second concave rib.

[0017] As a further improvement of the present invention, the outer metal shell is provided with a first flange extending from the first main body, and the inner metal shell is provided with a second flange extending from the second main body, and the first flange and the second flange are welded together.

[0018] Compared with the prior art, the first main body and the second main body of the intake cone assembly of this utility model are fixed together by plug welding, thereby increasing the structural rigidity, improving the modal frequency, and effectively avoiding resonance and noise problems. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the intake cone assembly of this utility model in one embodiment.

[0020] Figure 2 yes Figure 1 Top view.

[0021] Figure 3 It is along Figure 2 A cross-sectional view of line AA in the middle.

[0022] Figure 4 This is a three-dimensional exploded view of the intake cone assembly of this utility model. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] Please refer to Figures 1 to 4 As shown, this utility model discloses an intake cone assembly 100 for use in an exhaust gas aftertreatment device. The intake cone assembly 100 includes an inner metal shell 1, an outer metal shell 2, heat insulation cotton 3 sandwiched between the inner metal shell 1 and the outer metal shell 2, and a guide plate 4 welded and fixed to the inner wall of the inner metal shell 1. The intake cone assembly 100 has an air inlet 5. The guide plate 4 is located downstream of the air inlet 5 along the exhaust gas flow direction. In the embodiment illustrated in this utility model, the guide plate 4 has a plurality of airflow perforations 41 penetrating the guide plate 4.

[0026] The outer metal shell 2 has a first main body 21, and the inner metal shell 1 has a second main body 11. The first main body 21 and the second main body 11 are fixed together by plug welding. This arrangement increases the structural rigidity of the intake cone assembly 100, improves the modal frequency, and effectively avoids resonance and noise problems.

[0027] In the embodiment illustrated in this utility model, the first main body 21 includes a first recessed portion 211 located in the middle and a first surrounding portion 212 surrounding the periphery of the first recessed portion 211.

[0028] The first recess 211 is provided with at least one first plug-in hole 2110, and the second main body 11 is exposed in the first plug-in hole 2110. During plug-in welding, solder fills the first plug-in hole 2110 and is fixed to the second main body 11.

[0029] In the embodiment illustrated in this utility model, there are multiple first plug welding holes 2110, which are arranged radially at intervals along the first recess 211.

[0030] The first recessed portion 211 is provided with a first concave rib 2111 that is further recessed from the main body of the first recessed portion 211, and the first plug weld hole 2110 is located in the first concave rib 2111. The first concave rib 2111 helps to increase the rigidity of the first recessed portion 211 on the one hand, and helps to reduce the distance between the first recessed portion 211 and the second main body portion 11 on the other hand, thereby facilitating plug welding.

[0031] In the embodiment illustrated in this utility model, the axis of the air inlet 5 is perpendicular to the extension direction of the first concave rib 2111.

[0032] The first surrounding portion 212 is provided with at least one second plug welding hole 2120, and the second main body portion 11 is exposed in the second plug welding hole 2120; during plug welding, the solder fills the second plug welding hole 2120 and is fixed to the second main body portion 11.

[0033] In the embodiment illustrated in this utility model, there are multiple second plug welding holes 2120, which are spaced apart circumferentially along the first surrounding portion 212.

[0034] In the embodiment illustrated in this utility model, the first surrounding portion 212 is provided with a second concave rib 2121 that is further recessed from the main body of the first surrounding portion 212, and the second plug welding hole 2120 is located in the second concave rib 2121.

[0035] The second concave rib 2121 is beneficial to increasing the rigidity of the first surrounding part 212 on the one hand, and to reducing the distance between the first surrounding part 212 and the second main body part 11 on the other hand, thereby facilitating plug welding.

[0036] Those skilled in the art will understand that the insulation cotton 3 has grooves corresponding to the first concave rib 2111 and the second concave rib 2121.

[0037] The outer metal shell 2 has a first flange 22 extending from the first main body 21. The inner metal shell 1 has a second flange 12 extending from the second main body 11. The first flange 22 and the second flange 12 are welded together.

[0038] When engine exhaust flows in through the intake port 5, it enters the aftertreatment system cavity under the action of the guide plate 4. Airflow pulsation excitation impacts the inner metal housing 1, and the vibration excitation propagates to the outer metal housing 2 through the weld joints. Because the outer metal housing 2 has a ribbed design, and the inner metal housing 1 and outer metal housing 2 are welded together, the intake cone assembly 100 of this invention has high overall rigidity, high frequency, and its modes avoid the engine's main order, thus preventing resonance noise problems. Simultaneously, the heat insulation cotton 3 located between the inner metal housing 1 and the outer metal housing 2 partially separates the areas, preventing heat dissipation and meeting functional requirements.

[0039] Compared with the prior art, the first main body 21 and the second main body 11 of the intake cone assembly 100 of this utility model are fixed together by plug welding, thereby increasing the structural rigidity, improving the modal frequency, and effectively avoiding resonance and noise problems.

[0040] 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 intake cone assembly for use in an exhaust aftertreatment device, characterized in that: The intake cone assembly includes an inner metal shell, an outer metal shell, and heat insulation cotton sandwiched between the inner metal shell and the outer metal shell. The outer metal shell has a first main body portion, and the inner metal shell has a second main body portion. The first main body portion and the second main body portion are fixed together by plug welding.

2. The intake cone assembly as described in claim 1, characterized in that: The first main body includes a first recessed portion located in the middle and a first surrounding portion surrounding the periphery of the first recessed portion.

3. The intake cone assembly as described in claim 2, characterized in that: The first recess is provided with at least one first plug weld hole, and the second main body portion is exposed in the first plug weld hole; During plug welding, the solder fills the first plug welding hole and is fixed to the second main body.

4. The intake cone assembly as described in claim 3, characterized in that: The first plug welding hole is multiple and is arranged at radial intervals along the first recess.

5. The intake cone assembly as described in claim 4, characterized in that: The first recessed portion is provided with a first concave rib that is further recessed from the main body of the first recessed portion, and the first plug weld hole is located in the first concave rib.

6. The intake cone assembly as described in claim 5, characterized in that: The air intake cone assembly is provided with an air intake port, and the axis of the air intake port is perpendicular to the extension direction of the first concave rib.

7. The intake cone assembly as described in claim 2, characterized in that: The first surrounding portion is provided with at least one second plug weld hole, and the second main body portion is exposed in the second plug weld hole; During plug welding, the solder fills the second plug welding hole and is fixed to the second main body.

8. The intake cone assembly as described in claim 7, characterized in that: The second plug welding hole is multiple and is arranged at intervals along the circumference of the first circumferential portion.

9. The intake cone assembly as described in claim 7, characterized in that: The first surrounding portion is provided with a second concave rib that is further recessed from the main body of the first surrounding portion, and the second plug weld hole is located in the second concave rib.

10. The intake cone assembly as claimed in claim 1, characterized in that: The outer metal shell has a first flange extending from the first main body, and the inner metal shell has a second flange extending from the second main body. The first flange and the second flange are welded together.

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