WO2021212745A1

WO2021212745A1 - Exhaust gas after-treatment package

Info

Publication number: WO2021212745A1
Application number: PCT/CN2020/118256
Authority: WO
Inventors: 吕春虎; 于百战
Original assignee: 天纳克（苏州）排放系统有限公司
Priority date: 2020-04-21
Filing date: 2020-09-28
Publication date: 2021-10-28
Also published as: CN111365106A

Abstract

An exhaust gas after-treatment package (100), comprising an outer housing (1), a first after-treatment carrier assembly (51), a second after-treatment carrier assembly (52), and a cavity (53) located downstream of the second after-treatment carrier assembly (52). The second after-treatment carrier assembly (52) comprises a second housing (521) and a diesel particulate trap (522) enclosed in the second housing (521). The outer housing (1) is provided with an opening (11) for removing the second after-treatment carrier assembly (52), a flange portion (12) surrounding the periphery of the opening (11), and an end cover assembly (13) for matching the flange portion (12). The end cover assembly (13) is detachably mounted on the flange portion (12), so as to facilitate the removal of the second after-treatment carrier assembly (52). The flange portion (12) is provided with first through holes (121) communicated with the cavity (53). The end cover assembly (13) comprises an end plate (131) and a reflection cavity (130) located on one side of the end plate (131). The end plate (131) is provided with second through holes (1311) communicating the reflection cavity (130) and the first through holes (121).

Description

Exhaust post-treatment package

This application claims the priority of a Chinese patent application whose application date is April 21, 2020, application number is 202010315419.1, and the title of the invention is "Exhaust Gas Post Treatment Package", the entire content of which is incorporated into this application by reference.

Technical field

The invention relates to a tail gas post-treatment package, belonging to the technical field of engine tail gas post-treatment.

Background technique

With the upgrade of emission regulations, some exhaust gas aftertreatment packages include diesel particulate traps. Diesel particulate trap is used to collect particulate matter in diesel exhaust gas. When the particulate matter is collected to a certain extent, the diesel particulate trap needs to be cleaned, otherwise it will seriously increase the back pressure of the system, which is not conducive to the normal operation of the system.

In the prior art, in order to facilitate the disassembly of the diesel particulate trap, some disassembly structures are designed. However, how to make the diesel particulate trap be sealed at the installation position when the diesel particulate trap is installed into the exhaust gas post-treatment package is in the technical field. Technical problems that technicians need to solve.

Summary of the invention

The purpose of the present invention is to provide an exhaust gas post-treatment package that is easy to disassemble.

To achieve the above objective, the present invention adopts the following technical solution: an exhaust gas after-treatment package, which includes an outer shell, a first after-treatment component located in the outer shell, and a second after-treatment component located downstream of the first after-treatment component. A processing component, and a cavity located downstream of the second post-processing component and communicating with the second post-processing component, the second post-processing component includes a second housing and is encapsulated in the second housing The diesel particulate trap in the case body is provided with an opening for detaching the second post-processing component, a flange portion surrounding the periphery of the opening, and an end cover component for mating with the flange portion The end cover assembly is detachably mounted on the flange portion, the flange portion is provided with a first through hole communicating with the cavity, and the end cover assembly includes an end plate and an end plate located at the end. The reflection cavity on one side of the plate, and the end plate is provided with a second through hole connecting the reflection cavity and the first through hole.

As a further improved technical solution of the present invention, the flange portion is provided with a plurality of first mounting holes, the end cover assembly is provided with a plurality of second mounting holes aligned with the first mounting holes, and the exhaust gas post-treatment package It includes a plurality of bolts used to install the end cover assembly on the flange portion, wherein the bolts pass through the second mounting hole and are tightened in the first mounting hole.

As a further improved technical solution of the present invention, the plurality of second mounting holes penetrate the end plate.

As a further improved technical solution of the present invention, the end cover assembly includes an end cover welded and fixed to the end plate, wherein the reflection cavity is located between the end plate and the end cover.

As a further improved technical solution of the present invention, the end cover is provided with a plurality of recesses located on the outside, the second mounting hole penetrates the recess, the bolt is provided with a head located in the recess, and the head The end cap is not protruding.

As a further improved technical solution of the present invention, the end cover is provided with an arc-shaped surface protruding into the reflecting cavity, and the center line of the diesel particulate trap passes through the center of the arc-shaped surface.

As a further improved technical solution of the present invention, there are several first perforations distributed on the circumference of the flange portion, and there are several second perforations distributed on the circumference of the end plate.

As a further improved technical solution of the present invention, the exhaust gas after-treatment package further includes a sealing ring clamped between the flange portion and the end plate.

As a further improved technical solution of the present invention, the sealing ring is provided with a number of third perforations and a number of third mounting holes, wherein the third perforation communicates with the corresponding first perforation and the corresponding second perforation, so The third mounting hole is aligned with the corresponding first mounting hole and the corresponding second mounting hole.

As a further improved technical solution of the present invention, the first aftertreatment component includes a first shell and a diesel oxidation catalyst packaged in the first shell; The first baffle and the second baffle, the first shell penetrates the first baffle and is welded and fixed to the first baffle, and the cylinder part penetrates the second baffle and is connected to the first baffle. The second baffle is welded and fixed.

Compared with the prior art, the present invention facilitates disassembly of the second post-processing assembly by detachably mounting the end cover assembly on the flange portion; in addition, the present invention provides a first through hole communicating with the reflecting cavity. Compared with the second perforation, it provides a simple structure of the air flow channel, which is beneficial to reduce the cost.

Description of the drawings

Fig. 1 is a three-dimensional schematic diagram of the exhaust gas post-treatment package of the present invention in an embodiment.

Fig. 2 is a right side view of Fig. 1.

Fig. 3 is a schematic cross-sectional view taken along the line K-K in Fig. 2.

Fig. 4 is a partially exploded perspective view of Fig. 1.

FIG. 5 is a perspective schematic view of the cover assembly in FIG. 4 from another angle.

Fig. 6 is an exploded perspective view of Fig. 5.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. If there are several specific embodiments, the features in these embodiments can be combined with each other without conflict. When the description refers to the accompanying 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 the embodiments of the present invention, on the contrary, they are only examples of products consistent with the present invention described in the claims of the present invention.

The terms used in the present invention are only for the purpose of describing specific implementations, and are not intended to limit the protection scope of the present invention. It should be understood that the terms "first", "second" and similar words used in the description and claims of the present invention do not denote any order, quantity or importance, but are only used to distinguish features. .

1 to 6, the present invention discloses an exhaust gas after-treatment package 100, which includes an outer casing 1, a first baffle 21 and a second baffle 22 located in the outer casing 1 and spaced apart. , The first post-processing carrier assembly 51 and the second post-processing carrier assembly 52.

In one embodiment of the present invention, the first post-processing carrier assembly 51 includes a first housing 511 and a diesel oxidation catalyst (DOC) 512 enclosed in the first housing 511; The processing carrier assembly 52 includes a second housing 521 and a diesel particulate filter (DPF) 522 enclosed in the second housing 521; the second post-processing carrier assembly 52 is located in the first post-processing carrier assembly 51 downstream. The outer shell 1 further includes a cavity 53 located downstream of the second post-processing component 52 and communicating with the second post-processing component 52.

Please refer to FIG. 2, the first housing 511 penetrates the first baffle 21 and is welded and fixed to the first baffle 21. The exhaust gas after-treatment package 100 includes a cylindrical portion 23 penetrating the second baffle 22, and the cylindrical portion 23 and the second baffle 22 are welded and fixed. The first housing 511 is welded and fixed to the cylindrical portion 23, and the second housing 521 is housed in the cylindrical portion 23 for easy disassembly.

The outer shell 1 is provided with an opening 11 for detaching the second post-processing carrier component 52, a flange portion 12 surrounding the periphery of the opening 11, and an end cover component for mating with the flange portion 12 13 and a sealing ring 14 clamped between the flange portion 12 and the end cover assembly 13. The end cover assembly 13 is detachably mounted on the flange portion 12.

In the illustrated embodiment of the present invention, the flange portion 12 is provided with a plurality of first through holes 121 and a plurality of first mounting holes 122, wherein the first through holes 121 and the first mounting holes 122 are all distributed in the On the circumference of the flange portion 12, the first through hole 121 communicates with the cavity 53.

The end cover assembly 13 includes an end plate 131 and an end cover 132 fixed to the end plate 131 by welding. The end cover assembly 13 is provided with a reflection cavity 130 between the end plate 131 and the end cover 132, and the reflection cavity 130 is located on one side of the end plate 131. The end plate 131 is provided with a second through hole 1311 connecting the reflecting cavity 130 and the first through hole 121 and a second mounting hole 1312 aligned with the first mounting hole 122. The second through holes 1311 and the second mounting holes 1312 are both distributed on the circumference of the end plate 131, and the second mounting holes 1312 penetrate the end cover 132. The exhaust gas after-treatment package 100 includes a plurality of bolts 15 for mounting the end cover assembly 13 to the flange portion 12, wherein the bolts 15 pass through the second mounting hole 1312 and are tightened on the The first mounting hole 121.

Specifically, the end cover 132 is provided with a plurality of recesses 1321 located on the outside, the second mounting hole 1312 penetrates the recess 1321, the bolt 15 is provided with a head 151 located in the recess 1321, and the head The portion 151 does not protrude from the end cap 132, thereby shortening the width of the exhaust gas post-treatment package 100. In addition, the end cover 132 is provided with an arc-shaped surface 1322 protruding into the reflecting cavity 130, and the center line of the diesel particulate trap 522 passes through the center of the arc-shaped surface 1322. With this arrangement, when the airflow flows out of the diesel particulate trap 522, the airflow is dispersed around under the action of the arc-shaped surface 1322, which facilitates the airflow to flow downstream.

The sealing ring 14 is provided with a number of third through holes 141 and a number of third mounting holes 142, wherein the third through holes 141 communicate with the corresponding first through holes 121 and the corresponding second through holes 1311. The mounting hole 142 is aligned with the corresponding first mounting hole 122 and the corresponding second mounting hole 1312.

When the airflow flows out of the diesel particulate trap 522, the airflow first flows into the reflecting cavity 130 and is dispersed around under the action of the arc-shaped surface 1322; then, the airflow sequentially passes through the second perforation 1311, the third perforation 141, and The first perforation 121 enters the cavity 53 downstream.

The above embodiments are only used to illustrate the present invention and not 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 already described the present invention in detail with reference to the above embodiments. Note, however, those of ordinary skill 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 covered in Within the scope of the claims of the present invention.

Claims

An exhaust gas post-treatment package, which includes an outer shell, a first after-treatment component located in the outer shell, a second after-treatment component located downstream of the first after-treatment component, and a second after-treatment component located in the second after-treatment component A cavity downstream of and in communication with the second after-treatment assembly, the second after-treatment assembly including a second housing and a diesel particulate trap packaged in the second housing, characterized in that: The outer shell is provided with an opening for detaching the second post-processing component, a flange part surrounding the periphery of the opening, and an end cover assembly for mating with the flange part, and the end cover assembly is detachable Ground mounted on the flange portion, the flange portion is provided with a first through hole communicating with the cavity, the end cover assembly includes an end plate and a reflection cavity located on one side of the end plate, The end plate is provided with a second through hole connecting the reflection cavity and the first through hole.
The exhaust gas after-treatment package according to claim 1, wherein the flange portion is provided with a plurality of first mounting holes, and the end cover assembly is provided with a plurality of second mounting holes aligned with the first mounting holes , The exhaust gas after-treatment package includes a plurality of bolts used to install the end cover assembly on the flange portion, wherein the bolts pass through the second mounting hole and are tightened in the first mounting hole .
The exhaust gas post-treatment package according to claim 2, wherein the plurality of second mounting holes penetrate the end plate.
The exhaust gas post-treatment package of claim 2, wherein the end cover assembly includes an end cover welded and fixed to the end plate, wherein the reflection cavity is located between the end plate and the end cover .
The exhaust gas after-treatment package according to claim 4, wherein the end cover is provided with a plurality of recesses located on the outside, the second mounting hole penetrates the recess, and the bolt is provided with a recess located in the recess The head and the head does not protrude from the end cap.
The exhaust gas post-treatment package according to claim 4, wherein the end cover is provided with an arc surface protruding into the reflecting cavity, and the center line of the diesel particulate trap passes through the arc The center of the shape.
The exhaust gas post-treatment package according to claim 1, wherein: the first perforation is a plurality of and distributed on the circumference of the flange portion, and the second perforation is a plurality of and distributed on the end On the circumference of the plate.
3. The exhaust gas after-treatment package according to claim 2, wherein the exhaust gas after-treatment package further comprises a sealing ring clamped between the flange portion and the end plate.
The exhaust gas after-treatment package of claim 8, wherein the sealing ring is provided with a plurality of third perforations and a plurality of third mounting holes, wherein the third perforations communicate with the corresponding first perforation and the corresponding For the second through hole, the third mounting hole is aligned with the corresponding first mounting hole and the corresponding second mounting hole.
The exhaust gas after-treatment package according to claim 1, wherein the first after-treatment component includes a first shell and a diesel oxidation catalyst packaged in the first shell; the exhaust gas after-treatment package includes a A first baffle and a second baffle are arranged in the outer shell at intervals, the first shell penetrates the first baffle and is welded and fixed to the first baffle, and the cylinder part penetrates the The second baffle is welded and fixed with the second baffle.