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. According to the arrangement, the structural rigidity of the air inlet cone assembly is improved, the modal frequency is improved, and the problems of resonance and noise are effectively avoided.

Description

Background Art

[0002] The exhaust gas after-treatment device in the related art includes an intake cone assembly, which is used to introduce the exhaust gas of the vehicle engine into the exhaust gas after-treatment device, and treat the exhaust gas through various catalysts arranged in the exhaust gas after-treatment device to meet the requirements of emission regulations.

[0003] The intake cone assembly in the related art usually includes an inner shell, an outer shell and thermal insulation cotton. Since the intake cone assembly is close to the exhaust system, it is greatly affected by the pulse excitation of the engine airflow, especially the in-cylinder brake engine is prone to noise problems. When the stiffness and mode of the intake cone assembly are low, it is easily affected by the pulse excitation and resonance occurs, resulting in excessive noise.

[0004] Therefore, it is necessary to optimize the design of the air intake cone assembly in the related technology. Summary of the invention

[0005] The object of the present invention is to provide an air intake cone assembly with good structural rigidity.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: an intake cone assembly, used in an exhaust gas after-treatment device, the intake cone assembly includes an inner metal shell, an outer metal shell and insulation cotton clamped between the inner metal shell and the outer metal shell, the outer metal shell is provided with a first main body, the inner metal shell is provided with a second main body, and the first main body and the second main body are fixed together by plug welding.

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

[0008] As a further improved technical solution of the present invention, the first recessed portion is provided with at least one first plug welding hole, and the second main body portion 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 improved technical solution of the present invention, there are multiple first plug welding holes and they are arranged at intervals along the radial direction of the first recessed portion.

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

[0012] As a further improved technical solution of the present invention, 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 improved technical solution 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 improved technical solution of the present invention, there are multiple second plug welding holes and they are arranged at intervals along the circumference of the first surrounding portion.

[0016] As a further improved technical solution of the present invention, the first surrounding portion is provided with a second concave rib 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 improved technical solution of the present invention, the outer metal shell is provided with a first flange portion extending from the first main body portion, and the inner metal shell is provided with a second flange portion extending from the second main body portion, and the first flange portion and the second flange portion are welded and fixed together.

[0018] Compared with the prior art, the first main body and the second main body of the intake cone assembly of the present invention are fixed together by plug welding, thereby increasing the structural rigidity, improving the modal frequency, and effectively avoiding resonance and noise problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of an intake cone assembly of the present invention in one embodiment.

[0020] Figure 2 yes Figure 1 Top view of the .

[0021] Figure 3 is along Figure 2 Schematic diagram of the cross section along line AA.

[0022] Figure 4 It is a three-dimensional exploded view of the air intake cone assembly of the present invention. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, where if there are several specific embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to 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 specific 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 embodiments and are not intended to limit the scope of protection of the present invention. It should be understood that the words "first", "second" and the like 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 4 As shown, the present invention discloses an air intake cone assembly 100 for use in an exhaust gas aftertreatment device. The air intake cone assembly 100 includes an inner metal shell 1, an outer metal shell 2, a heat insulation cotton 3 clamped 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 air intake cone assembly 100 is provided with an air intake port 5. The guide plate 4 is arranged downstream of the air intake port 5 along the exhaust gas flow direction. In the illustrated embodiment of the present invention, the guide plate 4 is provided with a plurality of air flow through holes 41 penetrating the guide plate 4.

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

[0027] In the illustrated embodiment of the present invention, the first main body portion 21 includes a first recessed portion 211 located in the middle and a first surrounding portion 212 disposed around the periphery of the first recessed portion 211 .

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

[0029] In the illustrated embodiment of the present invention, there are a plurality of first plug welding holes 2110 , which are arranged at intervals along the radial direction of the first recessed portion 211 .

[0030] The first recessed portion 211 is provided with a first recessed rib 2111 which is further recessed from the main body of the first recessed portion 211, and the first plug welding hole 2110 is located in the first recessed rib 2111. The first recessed rib 2111 is conducive to increasing the rigidity of the first recessed portion 211 on the one hand, and is conducive to reducing the distance between the first recessed portion 211 and the second main body 11 on the other hand, so as to facilitate plug welding.

[0031] In the illustrated embodiment of the present invention, the axis of the air inlet 5 and the extending direction of the first concave rib 2111 are perpendicular to each other.

[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 illustrated embodiment of the present invention, there are a plurality of second plug welding holes 2120 , which are arranged at intervals along the circumference of the first surrounding portion 212 .

[0034] In the illustrated embodiment of the present invention, the first surrounding portion 212 is provided with a second concave rib 2121 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 portion 212 on the one hand, and is beneficial to reducing the distance between the first surrounding portion 212 and the second main body portion 11 on the other hand, thereby facilitating plug welding.

[0036] Those skilled in the art can understand that the thermal insulation cotton 3 is provided with grooves corresponding to the first concave rib 2111 and the second concave rib 2121 .

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

[0038] When the exhaust gas of the engine flows in from the air inlet 5, the exhaust gas enters the inner cavity of the after-treatment system under the action of the guide plate 4. The airflow pulsation excitation will impact the inner metal shell 1, and the vibration excitation will be transmitted to the outer metal shell 2 through the welding point. Since the outer metal shell 2 is provided with a rib shape, and the inner metal shell 1 and the outer metal shell 2 are welded and fixed together. Therefore, the overall stiffness of the intake cone assembly 100 of the present invention is relatively large, the frequency is relatively high, the mode avoids the main order of the engine, and the generation of resonance noise problems is avoided. At the same time, the heat insulation cotton 3 located between the inner metal shell 1 and the outer metal shell 2 is partially separated to prevent heat dissipation and meet functional requirements.

[0039] Compared with the prior art, the first main body 21 and the second main body 11 of the air intake cone assembly 100 of the present invention 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 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 this specification has described the present invention 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 covered within the scope of the claims of the present invention.

Claims

1. An intake cone assembly, used in an exhaust gas after-treatment device, characterized in that: The intake cone assembly includes 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, and the inner metal shell is provided with a second main body. The first main body and the second main body are fixed together by plug welding.

2. The air intake cone assembly according to claim 1, characterized in that: The first main body portion includes a first recessed portion located in the middle and a first surrounding portion disposed around the periphery of the first recessed portion.

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

4. The air intake cone assembly according to claim 3, characterized in that: The number of the first plug welding holes is plural and the first plug welding holes are arranged at intervals along the radial direction of the first recessed portion.

5. The air intake cone assembly according to claim 4, characterized in that: The first recessed portion is provided with a first recessed rib further recessed from a main body of the first recessed portion, and the first plug welding hole is located in the first recessed rib.

6. The air intake cone assembly according to 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 extending direction of the first concave rib.

7. The air intake cone assembly according to claim 2, characterized in that: 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; During plug welding, the solder fills the second plug welding hole and is fixed to the second main body.

8. The air intake cone assembly according to claim 7, characterized in that: There are a plurality of second plug welding holes, which are arranged at intervals along the circumferential direction of the first surrounding portion.

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

10. The air intake cone assembly according to claim 1, characterized in that: The outer metal shell is provided with a first flange portion extending from the first main body portion, and the inner metal shell is provided with a second flange portion extending from the second main body portion, and the first flange portion and the second flange portion are welded and fixed together.

Images