WO2022166601A1

WO2022166601A1 - Exhaust gas post-treatment package

Info

Publication number: WO2022166601A1
Application number: PCT/CN2022/072902
Authority: WO
Inventors: 严俊; 刘豫辉; 章凯
Original assignee: 天纳克（苏州）排放系统有限公司
Priority date: 2021-02-04
Filing date: 2022-01-20
Publication date: 2022-08-11
Also published as: CN112796865A

Abstract

An exhaust gas post-treatment package. The exhaust gas post-treatment package comprises a gas intake end cone (5), a first post-treatment assembly (1) connected to the gas intake end cone (5), a second post-treatment assembly (2) detachably mounted in the first post-treatment assembly (1), a mixer assembly (4) connected downstream of the second post-treatment assembly (2), and a hoop (6), wherein the first post-treatment assembly (1), the second post-treatment assembly (2) and the mixer assembly (4) are arranged in the axial direction of the exhaust gas post-treatment package in an aligned manner, and the first post-treatment assembly (1), the second post-treatment assembly (2) and the mixer assembly (4) are detachably connected to each other by means of the hoop (6). In actual use, an end of the second post-treatment assembly can be disassembled and assembled using only one hoop, thereby reducing the cost.

Description

Exhaust aftertreatment package

This application claims the priority of the Chinese patent application with the filing date of February 4, 2021, the application number of 202110158541.7, and the invention name of "exhaust gas post-treatment package", the entire contents of which are incorporated into this application by reference.

technical field

The invention relates to an exhaust gas aftertreatment package, which belongs to the technical field of engine exhaust gas aftertreatment.

Background technique

Existing exhaust aftertreatment packages usually include linear, U-shaped, and S-shaped, etc., wherein the linear exhaust aftertreatment package usually includes a first aftertreatment component, a second aftertreatment component, a mixer component, and a third aftertreatment component. components. The first aftertreatment component is a diesel oxidation catalyst, the second aftertreatment component is a diesel particulate trap, and the third aftertreatment component is a selective catalytic reducer. In order to solve the requirement of easy cleaning of the diesel particulate filter, the exhaust gas aftertreatment package in the prior art usually includes a first clamp detachably connecting the first aftertreatment assembly and the second aftertreatment assembly, and a detachable groundingly connects the second aftertreatment assembly and the first clamp of the mixer assembly. However, this design requires two clamps, which is expensive and complicated to disassemble.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a low-cost exhaust gas aftertreatment package.

In order to achieve the above purpose, the present invention adopts the following technical solutions: an exhaust gas aftertreatment package, which includes an intake end cone, a first aftertreatment component connected with the intake end cone, and a detachable installation on the first end cone. A second aftertreatment assembly in an aftertreatment assembly, a mixer assembly connected downstream of the second aftertreatment assembly, and a clamp, wherein the first aftertreatment assembly, the second aftertreatment assembly, and the The mixer assembly is aligned along the axial direction of the exhaust aftertreatment package, and the clip detachably connects the first aftertreatment assembly, the second aftertreatment assembly, and the mixer assembly together.

As a further improved technical solution of the present invention, the first aftertreatment assembly includes a first casing and a first aftertreatment carrier packaged in the first casing, and the first casing is provided with an edge along the exhaust gas The axial direction of the post-processing package extends beyond the receiving portion of the first post-processing carrier; the second post-processing assembly includes a second housing and a second post-processing carrier packaged in the second housing, the The second post-processing assembly is detachably accommodated in the accommodating portion.

As a further improved technical solution of the present invention, the mixer assembly is provided with an outer casing, the first casing is provided with a first flange portion, the second casing is provided with a raised portion, and the outer casing is provided with a The second flanging part, the raised part is provided with a first oblique edge part close to the first flanging part and a second oblique edge part close to the second flanging part, the clamp clamps the first oblique edge part A flange portion and the second flange portion are detachably connected together.

As a further improved technical solution of the present invention, the exhaust gas after-treatment package further includes a first sealing gasket clamped between the first flange portion and the first beveled edge portion, and a first sealing gasket clamped between the first flange portion and the first bevel portion. A second sealing gasket between the second flange portion and the second beveled portion.

As a further improved technical solution of the present invention, the second post-processing assembly includes a connecting ring fixedly connected with the second housing and a handle fixed on the connecting ring, the connecting ring is provided with an air flow to pass through of openings.

As a further improved technical solution of the present invention, the second post-processing assembly includes a buffer member located between the connecting ring and the second post-processing carrier.

As a further improved technical solution of the present invention, the accommodating portion is provided with a plurality of positioning bosses protruding inward, and the positioning bosses are in contact with the second housing.

As a further improved technical solution of the present invention, the mixer assembly is provided with a urea nozzle mounted on the outer casing, and the urea nozzle is used to spray atomized urea droplets into the outer casing.

As a further improved technical solution of the present invention, the first after-treatment component is a diesel oxidation catalyst, the second after-treatment component is a diesel particulate filter, and the exhaust after-treatment package further includes a device connected to the mixer component. downstream selective catalytic reductant.

Compared with the prior art, in the present invention, the second aftertreatment assembly is detachably installed in the first aftertreatment assembly by providing a clamp, so that only one clamp is needed to realize the second aftertreatment assembly. The end disassembly and assembly, reduce the cost.

Description of drawings

FIG. 1 is a schematic perspective view of the exhaust gas aftertreatment package of the present invention in one embodiment.

FIG. 2 is a partially exploded perspective view of FIG. 1 with the first bracket assembly and the second bracket assembly separated.

FIG. 3 is a partially exploded perspective view of FIG. 1 .

FIG. 4 is a partially exploded perspective view of FIG. 3 from another angle.

FIG. 5 is a further exploded perspective view of FIG. 4 .

FIG. 6 is a schematic cross-sectional view taken along the line A-A in FIG. 1 .

FIG. 7 is a partial enlarged view of the circled portion B in FIG. 6 .

Detailed ways

1 to 7, the present invention discloses an exhaust aftertreatment package 100, which includes an intake cone 5, a first aftertreatment component 1, a second aftertreatment component 2, and is connected to the second aftertreatment component A mixer assembly 4 downstream of the treatment assembly 2 , a third aftertreatment assembly 3 connected downstream of the mixer assembly 4 , and a clamp 6 . In the illustrated embodiment of the present invention, the exhaust gas aftertreatment package 100 is linear, that is, the first aftertreatment component 1 , the second aftertreatment component 2 , the mixer component 4 , and the first aftertreatment component 1 . The three aftertreatment assemblies 3 are arranged in alignment along the axial direction of the exhaust aftertreatment package 100 . The clamp 6 detachably connects the first aftertreatment assembly 1 , the second aftertreatment assembly 2 and the mixer assembly 4 together.

The first post-processing assembly 1 includes a first housing 11 , a first post-processing carrier 12 packaged in the first housing 11 , and a first post-processing carrier 12 mounted on the first housing 11 in a position-adjustable manner. Bracket assembly 13 . In the illustrated embodiment of the present invention, the first aftertreatment component 1 is a diesel oxidation catalyst (DOC).

Referring to FIG. 1 and FIG. 2 , the first bracket assembly 13 includes a first strap 131 that can be mounted on the first housing 11 in a position-adjustable manner, and is welded and fixed on the first strap 131 The first mounting bracket 132 is provided with a first mounting hole 1320 for connecting with the vehicle body bracket. The first strap 131 is provided with a first engagement portion 1311 and a second engagement portion 1312 , and the first bracket assembly 13 further includes a latch assembly for fixing the first engagement portion 1311 and the second engagement portion 1312 1313. In the illustrated embodiment of the present invention, the lock assembly 1313 is a bolt and a nut. The first mounting bracket 132 is roughly in the shape of an inverted U, and includes a first elevated portion 1321 , a second elevated portion 1322 and a first elevated portion 1321 and the second elevated portion 1322 . Connection part 1323. The first elevated portion 1321 and the second elevated portion 1322 are welded and fixed to the first housing 11 , and the first mounting hole 1320 is provided on the first connecting portion 1323 . The first bracket assembly 13 further includes a first mounting nut 1324 fixed to the bottom of the first connecting portion 1323 by welding and corresponding to the first mounting hole 1320 . The first bracket assembly 13 further includes a plurality of first support plates 133 located between the first mounting bracket 132 and the first housing 11 , and the first support plates 133 are welded to the first housing. The arc bottom surface 1331 of the body 11 , the first side surface 1332 welded to the first elevated portion 1321 , the second side surface 1333 welded to the second elevated portion 1322 , and the first side surface 1333 welded to the first connection portion 1323 Top surface 1334.

The first casing 11 is provided with a receiving portion 111 extending beyond the first after-treatment carrier 12 along the axial direction of the exhaust gas after-treatment package 100 . The receiving portion 111 is provided with a plurality of positioning protrusions 1111 protruding inward. The shape of the positioning convex hull 1111 may be circular or elongated, which is not limited in the present invention.

The second post-processing assembly 2 includes a second housing 21 and a second post-processing carrier 22 packaged in the second housing 21 . The second aftertreatment carrier 22 is located downstream of the first aftertreatment carrier 12 along the axial direction of the exhaust gas aftertreatment package 100 . In the illustrated embodiment of the present invention, the second aftertreatment component 2 is a diesel particulate filter (DPF). The second post-processing assembly 2 is detachably accommodated in the accommodating portion 111 . The positioning boss 1111 is in contact with the second casing 21 to radially position the second aftertreatment assembly 2 . The second post-processing assembly 2 includes a connecting ring 23 fixedly connected with the second housing 21 and a handle 24 fixed on the connecting ring 23 , and the connecting ring 23 is provided with an opening for air flow to pass through. 231. The second post-processing assembly 2 further includes a buffer member 25 located between the connecting ring 23 and the second post-processing carrier 22 .

The third post-processing assembly 3 includes a third housing 31 , a third post-processing carrier 32 packaged in the third housing 31 , and a second post-processing carrier 32 mounted on the third housing 31 in a non-adjustable position. Bracket assembly 33 . In the illustrated embodiment of the present invention, the third aftertreatment component 3 is a selective catalytic reducer (SCR). The first bracket assembly 13 and the second bracket assembly 33 are used to mount the exhaust after-treatment package 100 on a vehicle body bracket (not shown).

The second bracket assembly 33 includes an arc-shaped mounting plate 331 welded and fixed on the third housing 31 and a second mounting bracket 332 welded and fixed on the arc-shaped mounting plate 331. The second mounting bracket 332 is provided with a second mounting hole 333 for connecting with the body bracket. The second mounting bracket 332 is provided with a first supporting wall 3321, a second supporting wall 3322, and a second connecting portion 3323 connecting the first supporting wall 3321 and the second supporting wall 3322, the first supporting wall 3321 and the second support wall 3322 are welded and fixed to the third housing 31 , and the second mounting hole 333 is provided on the second connecting portion 3323 . The second bracket assembly 33 further includes a second mounting nut 3324 fixed to the bottom of the second connecting portion 3323 by welding and corresponding to the second mounting hole 333 .

The mixer assembly 4 is provided with an outer casing 41 , a mixing pipe (not shown) located in the outer casing 41 , and a urea nozzle 43 mounted on the outer casing 41 . The urea nozzle 43 is used to spray atomized urea droplets into the outer casing 41 . Specifically, the urea nozzle 43 is used to spray atomized urea droplets into the mixing pipe.

Specifically, the first housing 11 is provided with a first flange portion 112 , the second housing 21 is provided with a protruding portion 212 , and the outer housing 41 is provided with a second flange portion 412 . 212 is provided with a first bevelled portion 2121 close to the first flanging portion 112 and a second bevelled portion 2122 close to the second flanging portion 412, the clamp 6 attaches the first bevelled portion 112 and the second flange portion 412 are detachably connected together.

The exhaust gas aftertreatment package 100 further includes a first sealing gasket 71 sandwiched between the first flange portion 112 and the first beveled edge portion 2121 and a first sealing gasket 71 sandwiched between the second flange portion 412 and the second sealing gasket 72 between the second hypotenuse portion 2122 .

Compared with the prior art, the present invention provides a first bracket assembly 13 that can be installed on the first housing 11 in a position-adjustable manner, and a second bracket that is installed on the third housing 31 in an unadjustable position. For the assembly 33, the position and angle of the first mounting bracket 132 can be flexibly adjusted through the first bracket assembly 13, thereby facilitating installation, and the second bracket assembly 33 in a fixed position can avoid adverse effects on sensors disposed nearby. In addition, in the present invention, the second after-treatment assembly 2 is detachably installed in the first after-treatment assembly 1 by arranging the clamp 6, so that only one clamp 6 is needed to realize the second after-treatment assembly 2 The end disassembly and assembly reduce the cost.

The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art, although the present specification has been described in detail with reference to the above embodiments. However, those skilled in the art should understand that those skilled in the art can still modify or equivalently replace the present invention, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the within the scope of the claims of the present invention.

Claims

An exhaust gas aftertreatment package is characterized in that it includes an intake end cone, a first aftertreatment assembly connected with the intake end cone, and a second aftertreatment assembly detachably installed in the first aftertreatment assembly. A treatment assembly, a mixer assembly connected downstream of the second aftertreatment assembly, and a clamp, wherein the first aftertreatment assembly, the second aftertreatment assembly, and the mixer assembly are along the exhaust aftertreatment An axially aligned arrangement of the package, the clip removably connects the first aftertreatment assembly, the second aftertreatment assembly, and the mixer assembly together.
The exhaust gas aftertreatment package of claim 1, wherein the first aftertreatment component comprises a first casing and a first aftertreatment carrier packaged in the first casing, the first casing The body is provided with a receiving portion extending beyond the first after-treatment carrier along the axial direction of the exhaust gas after-treatment package; the second after-treatment component includes a second casing and a first after-treatment package packaged in the second casing. Two post-processing carriers, the second post-processing component is detachably accommodated in the accommodating portion.
The exhaust gas aftertreatment package of claim 2, wherein the mixer assembly is provided with an outer casing, the first casing is provided with a first flange portion, and the second casing is provided with a raised portion , the outer casing is provided with a second flanging portion, and the raised portion is provided with a first oblique edge portion close to the first flanging portion and a second oblique edge portion close to the second flanging portion, so The clamp detachably connects the first flange portion and the second flange portion together.
The exhaust gas aftertreatment package according to claim 3, wherein the exhaust gas aftertreatment package further comprises a first sealing gasket sandwiched between the first flange portion and the first beveled edge portion and a second sealing gasket sandwiched between the second flange portion and the second bevel portion.
The exhaust gas aftertreatment package according to claim 2, wherein the second aftertreatment assembly comprises a connecting ring fixedly connected with the second housing and a handle fixed on the connecting ring, the connecting ring The ring is provided with openings to allow airflow through.
The exhaust aftertreatment package of claim 5, wherein the second aftertreatment assembly includes a buffer between the connecting ring and the second aftertreatment carrier.
3. The exhaust gas aftertreatment package according to claim 2, wherein the receiving portion is provided with a plurality of positioning bosses protruding inwardly, and the positioning bosses are in contact with the second casing.
3. The exhaust gas aftertreatment package of claim 2, wherein the mixer assembly is provided with a urea nozzle mounted on the outer casing, the urea nozzle is used to spray atomized urea into the outer casing Urea droplets.
The exhaust aftertreatment package of claim 2, wherein the first aftertreatment component is a diesel oxidation catalyst, the second aftertreatment component is a diesel particulate trap, and the exhaust aftertreatment package further comprises: A selective catalytic reducer is connected downstream of the mixer assembly.