Exhaust gas aftertreatment package

Abstract

An exhaust gas aftertreatment package comprises a shell, an air inlet pipe assembly installed in the shell, an exhaust gas aftertreatment carrier located downstream of the air inlet pipe assembly, wherein the shell is provided with an inner cavity, an end cover closing one end of the inner cavity, an opening communicating with the inner cavity and a bottom wall opposite to the opening; the air inlet pipe assembly comprises an air inlet pipe accommodated in the opening and extending into the inner cavity, and a first support and a second support fixing the air inlet pipe to the shell, the first support and the second support are arranged along the axis of the air inlet pipe, the air inlet pipe is provided with a plurality of air holes penetrating through the side wall thereof, and the air holes communicate with the inner cavity. Compared with the prior art, the first support and the second support fixing the air inlet pipe to the shell are arranged, thereby improving the structural reliability of the air inlet pipe.

Description

Technical Field

[0001] The invention relates to an exhaust gas after-treatment package, belonging to the technical field of engine exhaust gas after-treatment. Background Art

[0002] Exhaust aftertreatment packages (e.g., diesel exhaust aftertreatment packages) are primarily used to treat or remove toxic and harmful substances from exhaust. Toxic substances in exhaust primarily include hydrocarbons, carbon monoxide, nitrogen oxides, and particulate matter. Existing technologies have employed a combination of diesel oxidation catalysts (DOCs), diesel particulate filters (DPFs), and selective catalytic reducers (SCRs) to improve exhaust treatment efficiency. Summary of the Invention

[0003] The object of the present invention is to provide an exhaust gas after-treatment carrier capable of stably fixing an intake pipe in a housing.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an exhaust gas after-treatment package, which includes a shell, an intake pipe assembly installed in the shell, and an exhaust gas after-treatment carrier located downstream of the intake pipe assembly, wherein the shell is provided with an inner cavity, an end cover closing one end of the inner cavity, an opening connected to the inner cavity, and a bottom wall opposite to the opening; the intake pipe assembly includes an intake pipe accommodated in the opening and extending into the inner cavity, and a first bracket and a second bracket fixing the intake pipe to the shell, the first bracket and the second bracket being spaced apart along the axis of the intake pipe, the intake pipe being provided with a plurality of air holes passing through its side wall, the air holes being connected to the inner cavity.

[0005] As a further improved technical solution of the present invention, the end of the air intake pipe assembly abuts against the bottom wall.

[0006] As a further improved technical solution of the present invention, the shell is cylindrical and the bottom wall is arc-shaped; the air intake pipe assembly includes a plugging cover fixed on the bottom wall, and the plugging cover closes the end of the air intake pipe.

[0007] As a further improved technical solution of the present invention, the first bracket is located below the second bracket, and the first bracket is provided with a first notch that matches the outer wall of the intake pipe, a first mounting portion located on both sides of the first notch, and a first flange portion extending along the edge of the first notch, the first mounting portion is fixed to the inner surface of the shell, and the first flange portion is welded and fixed to the outer wall of the intake pipe.

[0008] As a further improved technical solution of the present invention, the second bracket is provided with a second notch that cooperates with the outer wall of the intake pipe, a second mounting portion located on both sides of the second notch, and a second flange portion extending along the edge of the second notch, the second mounting portion is fixed to the inner surface of the shell, and the second flange portion is welded and fixed to the outer wall of the intake pipe.

[0009] As a further improved technical solution of the present invention, the second notch is U-shaped.

[0010] As a further improved technical solution of the present invention, the second bracket is provided with a raised portion aligned with the center line of the second notch, and the raised portion protrudes toward the direction of the opening; each of the second mounting portions is provided with an arc-shaped inner surface to form a double vortex of exhaust gas on both sides of the raised portion.

[0011] As a further improved technical solution of the present invention, the exhaust gas after-treatment package is S-shaped, and the exhaust gas after-treatment carrier includes a diesel oxidation catalyst exposed in the inner cavity, a diesel particulate filter located downstream of the diesel oxidation catalyst, and a selective catalytic reducer located downstream of the diesel particulate filter.

[0012] As a further improved technical solution of the present invention, the exhaust after-treatment package also includes a mixing chamber assembly connected between the diesel particulate filter and the selective catalytic reducer, the mixing chamber assembly includes a first mixing chamber, a second mixing chamber and a mixing tube connecting the first mixing chamber and the second mixing chamber, the mixing tube is provided with a plurality of swirl plates located in the first mixing chamber; the mixing chamber assembly also includes a guide plate located in the second mixing chamber, wherein the guide plate is provided with an arc-shaped recessed portion corresponding to the mixing tube.

[0013] Compared with the prior art, the present invention improves the structural reliability of the intake pipe by providing a first bracket and a second bracket for fixing the intake pipe to the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the exhaust gas after-treatment package of the present invention.

[0015] Figure 2 yes Figure 1 A three-dimensional diagram from another angle.

[0016] Figure 3 It is a three-dimensional schematic diagram of the exhaust gas after-treatment package of the present invention after removing the baffle near the intake pipe.

[0017] Figure 4 yes Figure 3 A partial enlarged view of the circled part A.

[0018] Figure 5 yes Figure 3 A partially exploded view of the intake manifold assembly is shown.

[0019] Figure 6 yes Figure 1 3D exploded view of .

[0020] Figure 7 yes Figure 6 Exploded three-dimensional diagram from another angle. DETAILED DESCRIPTION

[0021] Please refer to Figures 1 to 7 As shown, the present invention discloses an exhaust gas aftertreatment package 100, which is generally S-shaped and includes a housing 1, an intake pipe assembly 2 installed in the housing 1, a diesel oxidation catalyst (DOC) 3 located downstream of the intake pipe assembly 2, a diesel particulate filter (DPF) 4 located downstream of the DOC 3, a selective catalytic reducer (SCR) 5 located downstream of the DPF 4, and a mixing chamber assembly 6 connected between the DPF 4 and the SCR 5. The DOC 3, the DPF 4, and the SCR 5 are all exhaust gas aftertreatment carriers.

[0022] The housing 1 comprises an inner cavity 10, an end cap 11 closing one end of the inner cavity 10, an opening 12 communicating with the inner cavity 10, and a bottom wall 13 opposite to the opening 12. In the illustrated embodiment of the present invention, the housing 1 is cylindrical, and the bottom wall 13 is arc-shaped.

[0023] The air intake assembly 2 includes an air intake pipe 21 received in the opening 12 and extending into the inner cavity 10, and a first bracket 22 and a second bracket 23 for fixing the air intake pipe 21 to the housing. Figure 4 As shown, in the illustrated embodiment of the present invention, the first bracket 22 is mainly used to better achieve uniformity of airflow distribution, and the second bracket 23 is mainly used to assist in the structural reliability of the intake pipe 21. Of course, the first bracket 22 also helps to improve the structural reliability of the intake pipe 21.

[0024] The end of the intake pipe assembly 2 abuts against the bottom wall 13. Specifically, the intake pipe assembly 2 includes a plug 24 fixed to the bottom wall 13, which seals the end of the intake pipe 21. The intake pipe 21 is provided with a plurality of air holes 211 extending through its side wall, and the air holes 211 are connected to the inner cavity 10.

[0025] The first bracket 22 and the second bracket 23 are spaced apart along the axis of the intake pipe 21. In the illustrated embodiment of the present invention, the first bracket 22 is located below the second bracket 23. The first bracket 22 is provided with a first notch 221 that mates with the outer wall of the intake pipe 21, first mounting portions 222 located on either side of the first notch 221, and first flanged portions 223 extending along the edges of the first notch 221. The first mounting portions 222 are welded to the inner surface of the housing 1, and the first flanged portions 223 are welded to the outer wall of the intake pipe 21. The first notch 221 is semicircular, allowing it to be mounted on the intake pipe 21 from one side, facilitating assembly.

[0026] The second bracket 23 is provided with a second notch 231 that mates with the outer wall of the intake pipe 21, second mounting portions 232 located on either side of the second notch 231, and second flanged portions 233 extending along the edges of the second notch 231. The second mounting portions 232 are welded to the inner surface of the housing 1, while the second flanged portions 233 are welded to the outer wall of the intake pipe 21. The second notch 231 is U-shaped, allowing it to be mounted on the intake pipe 21 from one side, facilitating assembly.

[0027] Preferably, the second bracket 23 is provided with a raised portion 234 aligned with the centerline of the second notch 231, and the raised portion 234 protrudes toward the opening 12. Each second mounting portion 232 is provided with a curved inner surface 2321 to form a dual swirl flow of exhaust gas on both sides of the raised portion 234. This arrangement can improve the uniformity of exhaust gas passing through the diesel oxidation catalyst 3.

[0028] The mixing chamber assembly 6 includes a first mixing chamber 61, a second mixing chamber 62, and a mixing tube 63 connecting the first mixing chamber 61 and the second mixing chamber 62. The mixing tube 63 is provided with a plurality of swirl vanes (not shown) located in the first mixing chamber 61. The mixing chamber assembly 6 also includes a guide plate 64 located in the second mixing chamber 62, wherein the guide plate 64 is provided with an arc-shaped recessed portion 641 corresponding to the mixing tube 63 to better disperse the airflow.

[0029] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art. Although this specification has described the present invention in detail with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof 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 package, comprising a housing, an intake pipe assembly mounted in the housing, and an exhaust gas aftertreatment carrier located downstream of the intake pipe assembly, wherein the housing comprises an inner cavity, an end cap closing one end of the inner cavity, an opening communicating with the inner cavity, and a bottom wall opposite the opening; characterized in that: The intake pipe assembly includes an intake pipe housed in the opening and extending into the inner cavity, and a first bracket and a second bracket for fixing the intake pipe to the shell, the first bracket and the second bracket being spaced apart along the axis of the intake pipe, the intake pipe being provided with a plurality of air holes penetrating its side wall, the air holes being communicated with the inner cavity; the shell being cylindrical, and the bottom wall being arc-shaped; the first bracket and the second bracket being fixed to the bottom wall; the second bracket being provided with a second mounting portion, the second mounting portion being provided with an arc-shaped inner surface, the arc-shaped inner surface being configured to guide the exhaust gas and form the exhaust gas into a vortex.

2. The exhaust gas post-processing package according to claim 1, characterized in that: The end of the air intake pipe assembly rests against the bottom wall.

3. The exhaust gas post-processing package according to claim 2, characterized in that: The air intake pipe assembly includes a blocking cover fixed on the bottom wall, and the blocking cover closes the end of the air intake pipe.

4. The exhaust gas post-processing package according to claim 1, characterized in that: The first bracket is located below the second bracket, and the first bracket is provided with a first notch that matches the outer wall of the intake pipe, a first mounting portion located on both sides of the first notch, and a first flange portion extending along the edge of the first notch. The first mounting portion is fixed to the inner surface of the shell, and the first flange portion is welded and fixed to the outer wall of the intake pipe.

5. The exhaust gas post-processing package according to claim 4, characterized in that: The first notch is semicircular.

6. The exhaust gas post-processing package according to claim 4, characterized in that: The second bracket is provided with a second notch that matches the outer wall of the air intake pipe and a second flange portion extending along the edge of the second notch. The second mounting portion is located on both sides of the second notch. The second mounting portion is fixed to the inner surface of the shell, and the second flange portion is welded and fixed to the outer wall of the air intake pipe.

7. The exhaust gas post-processing package according to claim 6, characterized in that: The second notch is U-shaped.

8. The exhaust gas post-processing package according to claim 6, characterized in that: The second bracket is provided with a raised portion aligned with the center line of the second notch, and the raised portion protrudes toward the opening; each second mounting portion is provided with an arc-shaped inner surface to form a double vortex of exhaust gas on both sides of the raised portion.

9. The exhaust gas post-processing package according to claim 1, characterized in that: The exhaust gas after-treatment package is S-shaped, and the exhaust gas after-treatment carrier includes a diesel oxidation catalyst exposed in the inner cavity, a diesel particulate filter located downstream of the diesel oxidation catalyst, and a selective catalytic reducer located downstream of the diesel particulate filter.

10. The exhaust gas post-processing package according to claim 9, characterized in that: The exhaust after-treatment package also includes a mixing chamber assembly connected between the diesel particulate filter and the selective catalytic reducer, the mixing chamber assembly including a first mixing chamber, a second mixing chamber and a mixing tube connecting the first mixing chamber and the second mixing chamber, the mixing tube being provided with a plurality of swirl vanes located in the first mixing chamber; the mixing chamber assembly also includes a guide plate located in the second mixing chamber, wherein the guide plate is provided with an arc-shaped recessed portion corresponding to the mixing tube.

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