Tail gas treatment device

Abstract

A tail gas treatment device comprises a shell, a tail gas aftertreatment carrier packaged in the shell, a gas inlet cone connected with the shell and a spoiler fixed to the inner wall of the gas inlet cone and located on the upstream of the tail gas aftertreatment carrier in the gas flow direction. The air inlet cone is provided with a cylindrical mounting part and a cone part connected with the mounting part, the inner wall is arranged on the mounting part, and the mounting part is at least partially inserted into the shell and is welded and fixed with the shell; the spoiler is provided with a plurality of air flow penetrating holes, and the air flow penetrating holes are used for allowing air flow to penetrate so that the air flow can evenly flow through the end face of the tail gas aftertreatment carrier. Compared with the prior art, the tail gas treatment device is reliable in structure and capable of improving the uniformity of airflow when the airflow passes through the tail gas post-treatment carrier.

Description

Technical Field

[0001] The utility model relates to an exhaust gas treatment device, belonging to the technical field of engine exhaust gas post-treatment. Background Art

[0002] The exhaust gas treatment device in the related art generally includes a housing and an exhaust gas post-treatment carrier encapsulated in the housing. The uniformity of the airflow when passing through the exhaust gas post-treatment carrier has a substantial impact on the conversion efficiency. With the tightening of emission regulations, how to improve the uniformity of the airflow when passing through the exhaust gas post-treatment carrier is a technical problem faced by technicians in the relevant technical field. Utility Model Content

[0003] The utility model aims to provide an exhaust gas treatment device which has a reliable structure and can improve the uniformity of the airflow when passing through the exhaust gas post-treatment carrier.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an exhaust gas treatment device, which includes a shell, an exhaust gas after-treatment carrier encapsulated in the shell, an intake cone connected to the shell, and a spoiler fixed to the inner wall of the intake cone and located upstream of the exhaust gas after-treatment carrier along the airflow direction; the intake cone is provided with a cylindrical mounting portion and a cone portion connected to the mounting portion, the inner wall is provided on the mounting portion, the mounting portion is at least partially inserted into the shell and is welded and fixed to the shell; the spoiler is provided with a plurality of airflow through-holes, and the plurality of airflow through-holes are used to allow airflow to pass through so that the airflow flows evenly through the end face of the exhaust gas after-treatment carrier.

[0005] As a further improved technical solution of the utility model, the spoiler is provided with a main body and a flange portion extending from the main body, the flange portion is welded and fixed to the inner wall, and the plurality of air flow holes are provided on the main body.

[0006] As a further improved technical solution of the utility model, the main body is in a concave arc shape along the airflow direction.

[0007] As a further improved technical solution of the utility model, the exhaust gas after-treatment carrier includes a first exhaust gas after-treatment carrier and a second exhaust gas after-treatment carrier, wherein the first exhaust gas after-treatment carrier and the second exhaust gas after-treatment carrier are arranged at intervals along the airflow direction.

[0008] As a further improved technical solution of the utility model, the exhaust gas treatment device also includes a connecting shell connected to the shell, and the shell is at least partially inserted into the connecting shell and is welded and fixed to the connecting shell.

[0009] As a further improved technical solution of the utility model, the connecting shell is provided with an air outlet cavity, and the air outlet cavity is located downstream of the second exhaust gas after-treatment carrier along the air flow direction.

[0010] As a further improved technical solution of the utility model, the exhaust gas treatment device further comprises an end cover fixed on the end of the connecting shell, and the end cover is provided with a first raised portion protruding along the airflow direction.

[0011] As a further improved technical solution of the utility model, the exhaust gas treatment device also includes a guide cover fixed on the inner side wall of the end cover, the guide cover is provided with a second raised portion protruding in the direction of the airflow, the second raised portion is provided with an arc-shaped inner surface, and the inner surface is used to force the airflow to change its flow direction.

[0012] As a further improved technical solution of the utility model, the exhaust gas treatment device also includes an exhaust pipe connected to the exhaust cavity.

[0013] As a further improved technical solution of the utility model, the exhaust gas treatment device also includes a heat insulation cover fixed on the shell and / or the intake cone.

[0014] Compared with the prior art, the exhaust gas treatment device of the utility model is provided with a spoiler fixed to the inner wall of the intake cone and located upstream of the exhaust gas post-treatment carrier along the airflow direction; the intake cone is provided with a cylindrical mounting portion and a cone portion connected to the mounting portion, the inner wall is provided on the mounting portion, the mounting portion is at least partially inserted into the shell and welded and fixed to the shell, thereby improving the structural reliability. In addition, the spoiler is provided with a plurality of airflow perforations, and the plurality of airflow perforations are used to allow the airflow to pass through so that the airflow flows evenly through the end surface of the exhaust gas post-treatment carrier, thereby improving the uniformity of the airflow when passing through the exhaust gas post-treatment carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of an exhaust gas treatment device of the utility model in one embodiment.

[0016] Figure 2 yes Figure 1 Top view of the .

[0017] Figure 3 yes Figure 1 Right view of .

[0018] Figure 4 yes Figure 1 Left view of .

[0019] Figure 5 is along Figure 3 Schematic diagram of the cross section along line AA.

[0020] Figure 6 yes Figure 5 A partial enlarged view of the middle frame portion B. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] Please refer to Figures 1 to 6 As shown, the utility model discloses an exhaust gas treatment device 100, which includes a shell 1, an exhaust gas after-treatment carrier 2 encapsulated in the shell 1, an intake cone 3 connected to the shell 1, and a spoiler 4 fixed to the inner wall 33 of the intake cone 3 and located upstream of the exhaust gas after-treatment carrier 2 along the air flow direction M.

[0024] In the illustrated embodiment of the present invention, the exhaust gas post-treatment carrier 2 includes a first exhaust gas post-treatment carrier 21 and a second exhaust gas post-treatment carrier 22, wherein the first exhaust gas post-treatment carrier 21 and the second exhaust gas post-treatment carrier 22 are arranged at intervals along the airflow direction M.

[0025] In the illustrated embodiment of the present utility model, the intake cone 3 is provided with a cylindrical mounting portion 31 and a cone portion 32 connected to the mounting portion 31. The inner wall 33 is provided on the mounting portion 32. The mounting portion 32 is at least partially inserted into the housing 1 and fixed to the housing 1 by welding.

[0026] The spoiler 4 is provided with a plurality of airflow through holes 40 , and the plurality of airflow through holes 40 are used to allow airflow to pass through so that the airflow can flow evenly through the end surface of the exhaust gas post-treatment carrier 2 .

[0027] In the illustrated embodiment of the present invention, the spoiler 4 is provided with a main body 41 and a flange portion 42 extending from the main body 41, the flange portion 42 is welded and fixed to the inner wall 33, and the plurality of airflow holes 40 are provided in the main body 41. In the illustrated embodiment of the present invention, the main body 41 is in a concave arc shape along the airflow direction M.

[0028] The exhaust gas treatment device 100 further comprises a connecting shell 5 connected to the shell 1, wherein the shell 1 is at least partially inserted into the connecting shell 5 and is welded and fixed to the connecting shell 5. In the illustrated embodiment of the present utility model, the shell 1 and the connecting shell 5 are both cylindrical.

[0029] The connection housing 5 is provided with a gas outlet cavity 50 , and the gas outlet cavity 50 is located downstream of the second exhaust gas after-treatment carrier 22 along the air flow direction M.

[0030] The exhaust gas treatment device 100 also includes an end cover 61 fixed to the end of the connecting shell 5 and a guide cover 62 fixed to the inner side wall of the end cover 61. The end cover 61 is provided with a first raised portion 611 protruding along the airflow direction M. The guide cover 62 is provided with a second raised portion 621 protruding in the airflow direction M, and the second raised portion 621 is provided with an arc-shaped inner surface 6211, and the inner surface 6211 is used to force the airflow to change its flow direction. In the illustrated embodiment of the utility model, heat insulation cotton is provided between the end cover 61 and the guide cover 62.

[0031] The exhaust gas treatment device 100 further includes an outlet pipe 7 connected to the outlet cavity 50. In the illustrated embodiment of the present invention, the extension direction of the outlet pipe 7 (ie, the outlet direction) is perpendicular to the inlet direction.

[0032] The exhaust gas treatment device 100 further includes a heat shield 8 fixed to the housing 1 and / or the intake cone 3. In the illustrated embodiment of the utility model, the heat shield 8 includes a first heat shield 81 and a second heat shield 82, and the first heat shield 81 and the second heat shield 82 respectively cover a portion of the housing 1 and the intake cone 3. By providing the split first heat shield 81 and the second heat shield 82, it is beneficial to simplify the structure and facilitate installation.

[0033] Compared with the prior art, the exhaust gas treatment device 100 of the utility model is provided with a spoiler 4 fixed to the inner wall 33 of the intake cone 3 and located upstream of the exhaust gas post-treatment carrier 2 along the airflow direction M; the intake cone 3 is provided with a cylindrical mounting portion 31 and a cone portion 32 connected to the mounting portion 31, the inner wall 33 is provided on the mounting portion 31, the mounting portion 31 is at least partially inserted into the housing 1 and is welded and fixed to the housing 1, thereby improving the structural reliability. In addition, the spoiler 4 is provided with a plurality of airflow through holes 40, and the plurality of airflow through holes 40 are used to allow the airflow to pass through so that the airflow flows evenly through the end surface of the exhaust gas post-treatment carrier 2, thereby improving the uniformity of the airflow when passing through the exhaust gas post-treatment carrier 2.

[0034] 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. A tail gas treatment device, characterized in that: It includes a shell, an exhaust gas aftertreatment carrier encapsulated in the shell, an intake cone connected to the shell, and a spoiler fixed to the inner wall of the intake cone and located upstream of the exhaust gas aftertreatment carrier along the airflow direction; the intake cone is provided with a cylindrical mounting portion and a cone portion connected to the mounting portion, the inner wall is provided on the mounting portion, the mounting portion is at least partially inserted into the shell and is welded and fixed to the shell; the spoiler is provided with a plurality of airflow through holes, and the plurality of airflow through holes are used to allow airflow to pass through so that the airflow flows evenly through the end surface of the exhaust gas aftertreatment carrier.

2. The exhaust gas treatment device according to claim 1, characterized in that: The spoiler is provided with a main body and a flange portion extending from the main body, the flange portion is welded and fixed to the inner wall, and the plurality of air flow holes are provided on the main body.

3. The exhaust gas treatment device according to claim 2, characterized in that: The main body is in a concave arc shape along the airflow direction.

4. The exhaust gas treatment device according to claim 1, characterized in that: The exhaust gas aftertreatment carrier comprises a first exhaust gas aftertreatment carrier and a second exhaust gas aftertreatment carrier, wherein the first exhaust gas aftertreatment carrier and the second exhaust gas aftertreatment carrier are arranged at intervals along the airflow direction.

5. The exhaust gas treatment device according to claim 4, characterized in that: The exhaust gas treatment device further comprises a connecting shell connected to the shell, wherein the shell is at least partially inserted into the connecting shell and is welded and fixed to the connecting shell.

6. The exhaust gas treatment device according to claim 5, characterized in that: The connecting shell is provided with an air outlet cavity, and the air outlet cavity is located downstream of the second exhaust gas after-treatment carrier along the air flow direction.

7. The exhaust gas treatment device according to claim 6, characterized in that: The exhaust gas treatment device further comprises an end cover fixed on the end of the connecting shell, and the end cover is provided with a first raised portion protruding along the airflow direction.

8. The exhaust gas treatment device according to claim 7, characterized in that: The exhaust gas treatment device also includes a guide cover fixed on the inner side wall of the end cover, the guide cover is provided with a second raised portion protruding in the airflow direction, the second raised portion is provided with an arc-shaped inner surface, and the inner surface is used to force the airflow to change its flow direction.

9. The exhaust gas treatment device according to claim 8, characterized in that: The exhaust gas treatment device also includes an exhaust pipe communicated with the exhaust cavity.

10. The exhaust gas treatment device according to claim 1, characterized in that: The exhaust gas treatment device further comprises a heat shield fixed on the shell and / or the intake cone.

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