CN212154915U

CN212154915U - Tail gas aftertreatment encapsulation

Info

Publication number: CN212154915U
Application number: CN202020600453.9U
Authority: CN
Inventors: 吕春虎; 于百战
Original assignee: Tenneco Suzhou Emission System Co Ltd
Current assignee: Tenneco Suzhou Emission System Co Ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-12-15
Anticipated expiration: 2030-04-21

Abstract

An exhaust aftertreatment package comprising an outer housing, a first aftertreatment component, a second aftertreatment component, and a cavity downstream of the second aftertreatment component. The second aftertreatment assembly includes a second housing and a diesel particulate trap enclosed within the second housing. The shell body is provided with an opening for detaching the second aftertreatment component, a flange part surrounding the periphery of the opening and an end cover component matched with the flange part. The endcap assembly is removably mounted on the flange portion to facilitate removal of the second aftertreatment assembly; the flange portion be equipped with the first perforation that the cavity is linked together, the end cover subassembly includes the end plate and is located the reflection chamber of one side of end plate, the end plate is equipped with the intercommunication the reflection chamber with the second perforation of first perforation has formed a simple structure's air current passageway, is favorable to reduce cost.

Description

Tail gas aftertreatment encapsulation

Technical Field

The utility model relates to a tail gas aftertreatment encapsulation belongs to engine exhaust aftertreatment technical field.

Background

With the escalation of emissions regulations, some exhaust aftertreatment packages include diesel particulate traps. The diesel particulate trap is used for collecting particulate matters in the diesel exhaust, and when the particulate matters are collected to a certain degree, the diesel particulate trap needs to be cleaned, otherwise, the back pressure of the system can be seriously increased, and the normal operation of the system is not facilitated.

In the prior art, in order to facilitate the disassembly of the diesel particulate filter, some disassembly structures are designed, however, how to seal the installation position of the diesel particulate filter when the diesel particulate filter is installed in the exhaust aftertreatment package is a technical problem to be solved by technical personnel in the technical field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tail gas aftertreatment encapsulation convenient to dismantle.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an exhaust aftertreatment package comprising an outer shell, a first aftertreatment component located within the outer shell, a second aftertreatment component located downstream of the first aftertreatment component, and a cavity located downstream of the second aftertreatment component and in communication with the second aftertreatment component, the second aftertreatment assembly includes a second housing and a diesel particulate trap enclosed within the second housing, the outer shell is provided with an opening for detaching the second aftertreatment component, a flange part surrounding the periphery of the opening and an end cover component matched with the flange part, the end cover component is detachably arranged on the flange part, the flange part is provided with a first perforation communicated with the cavity, the end cover assembly comprises an end plate and a reflection cavity located on one side of the end plate, and the end plate is provided with a second through hole which is communicated with the reflection cavity and the first through hole.

As a further improved technical scheme of the utility model, flange portion is equipped with a plurality of first mounting holes, the end cover subassembly be equipped with a plurality of second mounting holes that first mounting hole is aligned, tail gas aftertreatment encapsulation including be used for with the end cover subassembly is installed a plurality of bolts on the flange portion, wherein the bolt passes the second mounting hole is in with the tightening in the first mounting hole.

As a further improved technical solution of the present invention, the plurality of second mounting holes are penetrated through 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 scheme of the utility model, the end cover is equipped with a plurality of caves that are located the outside, the second mounting hole runs through it is sunken, the bolt is equipped with and is located head in sunken just the head does not bulge the end cover.

As a further improved technical scheme of the utility model, the end cover be equipped with to convex arcwall face in the reflection chamber, diesel particulate trap's central line passes the center of arcwall face.

As a further improved technical solution of the present invention, the first through holes are a plurality of and distributed on the circumference of the flange portion, and the second through holes are a plurality of and distributed on the circumference of the end plate.

As a further improved technical scheme of the utility model, the tail gas aftertreatment encapsulation still includes the centre gripping and is in flange portion with sealing washer between the end plate.

As the utility model discloses further modified technical scheme, the sealing washer is equipped with a plurality of third and perforates and a plurality of third mounting hole, wherein the third perforates the intercommunication and corresponds first perforation with corresponding the second is perforated, the third mounting hole with correspond first mounting hole and corresponding the second mounting hole is aligned.

As a further improved technical solution of the present invention, the first aftertreatment component comprises a first casing and a diesel oxidation catalyst enclosed in the first casing; the tail gas aftertreatment encapsulation comprises a first baffle and a second baffle which are positioned in the outer shell and are arranged at intervals, the first shell penetrates through the first baffle and is welded and fixed with the first baffle, and the barrel body penetrates through the second baffle and is welded and fixed with the second baffle.

Compared with the prior art, the end cover assembly is detachably arranged on the flange part, so that the second post-processing assembly is convenient to disassemble; additionally, the utility model discloses a first perforation and the second perforation that the setting is linked together with the reflection chamber provide a simple structure's airflow channel, are favorable to reduce cost.

Drawings

Fig. 1 is a schematic perspective view of the exhaust aftertreatment package according to an embodiment of the present invention.

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

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

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

FIG. 5 is a perspective view of the cover assembly of FIG. 4 at another angle.

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

Detailed Description

The present invention will be described in detail with reference to the drawings, wherein if there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers or symbols in different drawings represent the same or similar elements unless otherwise specified. The matters described in the following exemplary embodiments do not represent all embodiments of the present invention, but rather they are merely examples of products consistent with the present invention as recited in the claims of the present invention.

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. It should be understood that the terms "first," "second," and the like as used in the description and in the claims of the present invention do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

Referring to fig. 1 to 6, the present invention discloses an exhaust gas aftertreatment package 100, which includes an outer casing 1, a first baffle 21 and a second baffle 22 disposed at an interval in the outer casing 1, a first aftertreatment carrier assembly 51, and a second aftertreatment carrier assembly 52.

In one embodiment of the present invention, the first aftertreatment support assembly 51 includes a first housing 511 and a Diesel Oxidation Catalyst (DOC)512 enclosed within the first housing 511; the second aftertreatment carrier assembly 52 includes a second housing 521 and a diesel particulate trap (DPF)522 enclosed within the second housing 521; the second aftertreatment carrier assembly 52 is located downstream of the first aftertreatment carrier assembly 51. The outer housing 1 further comprises a chamber 53 downstream of the second aftertreatment component 52 and in communication with the second aftertreatment component 52.

Referring 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 aftertreatment package 100 includes a barrel portion 23 penetrating the second stopper 22, and the barrel portion 23 and the second stopper 22 are welded and fixed. The first housing 511 is welded and fixed to the barrel 23, and the second housing 521 is housed in the barrel 23 to be easily detached.

The outer housing 1 is provided with an opening 11 for removing the second aftertreatment carrier assembly 52, a flange portion 12 surrounding the opening 11, an end cap assembly 13 for mating with the flange portion 12, and a gasket 14 sandwiched between the flange portion 12 and the end cap assembly 13. The end cap assembly 13 is removably mounted to 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 distributed on the circumference of the flange portion 12, and the first through holes 121 are communicated with the cavity 53.

The end cap assembly 13 includes an end plate 131 and an end cap 132 welded to the end plate 131. The end cap assembly 13 is provided with a reflective cavity 130 between the end plate 131 and the end cap 132, and the reflective cavity 130 is located at one side of the end plate 131. The end plate 131 is provided with a second penetration hole 1311 communicating the reflection chamber 130 with the first penetration 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 distributed on the circumference of the end plate 131, and the second mounting holes 1312 penetrate the end cover 132. The exhaust aftertreatment package 100 includes a number of bolts 15 to mount the end cap assembly 13 to the flange portion 12, wherein the bolts 15 pass through the second mounting holes 1312 and are tightened in the first mounting holes 121.

Specifically, the end cap 132 is provided with a plurality of recesses 1321 at the outer side, the second mounting hole 1312 penetrates through the recess 1321, the bolt 15 is provided with a head 151 located in the recess 1321, and the head 151 does not protrude out of the end cap 132, so that the width of the exhaust gas aftertreatment package 100 is shortened. In addition, the end cap 132 is provided with an arc surface 1322 protruding into the reflection chamber 130, and the center line of the diesel particulate trap 522 passes through the center of the arc surface 1322. So configured, when the airflow exits the diesel particulate trap 522, the airflow is dispersed around by the curved surface 1322, thereby facilitating the airflow to flow downstream.

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

When the airflow flows out of the diesel particulate trap 522, the airflow firstly flows into the reflection chamber 130 and is dispersed around under the action of the arc-shaped surface 1322; the gas flow then passes through the second perforations 1311, the third perforations 141 and the first perforations 121 in sequence and into the downstream cavity 53.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the skilled personnel in the art should understand that the technical personnel in the technical field can still modify or substitute the present invention, and all the technical solutions and modifications thereof 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. The utility model provides an exhaust aftertreatment encapsulation, its includes the shell body, is located first aftertreatment subassembly in the shell body, is located second aftertreatment subassembly of the low reaches of first aftertreatment subassembly and being located the low reaches of second aftertreatment subassembly and with the cavity that second aftertreatment subassembly is linked together, second aftertreatment subassembly includes the second casing and encapsulates the diesel particulate trap in the second casing, its characterized in that: the shell body is equipped with and is used for dismantling the opening of second aftertreatment subassembly, centers on opening peripheral flange portion and be used for with flange portion matched with end cover subassembly, end cover subassembly detachably installs on the flange portion, flange portion be equipped with the first perforation that the cavity is linked together, end cover subassembly includes the end plate and is located the reflection chamber of one side of end plate, the end plate is equipped with the intercommunication the reflection chamber with first fenestrate second is perforated.

2. The exhaust aftertreatment package of claim 1, wherein: the flange portion is provided with a plurality of first mounting holes, the end cap assembly is provided with a plurality of second mounting holes aligned with the first mounting holes, and the exhaust aftertreatment package includes a plurality of bolts for mounting the end cap assembly to the flange portion, wherein the bolts pass through the second mounting holes and are tightened in the first mounting holes.

3. The exhaust aftertreatment package of claim 2, wherein: the second mounting holes penetrate through the end plate.

4. The exhaust aftertreatment package of claim 2, wherein: the end cap assembly includes an end cap welded to the end plate, wherein the reflective cavity is located between the end plate and the end cap.

5. The exhaust aftertreatment package of claim 4, wherein: the end cover is provided with a plurality of depressions positioned on the outer side, the second mounting holes penetrate through the depressions, the bolts are provided with heads positioned in the depressions, and the heads do not protrude out of the end cover.

6. The exhaust aftertreatment package of claim 4, wherein: the end cover is provided with an arc-shaped surface protruding into the reflection cavity, and the center line of the diesel particle catcher penetrates through the center of the arc-shaped surface.

7. The exhaust aftertreatment package of claim 1, wherein: the first through holes are distributed on the circumference of the flange part, and the second through holes are distributed on the circumference of the end plate.

8. The exhaust aftertreatment package of claim 2, wherein: the exhaust aftertreatment package further comprises a sealing ring clamped between the flange portion and the end plate.

9. The exhaust aftertreatment package of claim 8, wherein: the sealing ring is provided with a plurality of third through holes and a plurality of third mounting holes, wherein the third through holes are communicated with the corresponding first through holes and the corresponding second through holes, and the third mounting holes are aligned with the corresponding first mounting holes and the corresponding second mounting holes.

10. The exhaust aftertreatment package of claim 1, wherein: the first aftertreatment assembly includes a barrel portion, a first housing, and a diesel oxidation catalyst enclosed within the first housing; the tail gas aftertreatment encapsulation comprises a first baffle and a second baffle which are positioned in the outer shell and are arranged at intervals, the first shell penetrates through the first baffle and is welded and fixed with the first baffle, and the barrel body penetrates through the second baffle and is welded and fixed with the second baffle.