CN217783600U

CN217783600U - Tail gas aftertreatment encapsulation

Info

Publication number: CN217783600U
Application number: CN202222280111.5U
Authority: CN
Inventors: 李硕; 吴涛涛; 王伟; 顾鹏建
Original assignee: Tenneco Suzhou Emission System Co Ltd
Current assignee: Tenneco Suzhou Emission System Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-11
Anticipated expiration: 2032-08-29

Abstract

An exhaust aftertreatment package comprising a housing, at least one exhaust treatment carrier located within the housing, and an outlet cone assembly connected to the housing. The awl subassembly of giving vent to anger includes the awl of giving vent to anger, is fixed in the perforated plate in the awl of giving vent to anger, be located the awl of giving vent to anger with detection cavity between the perforated plate and be fixed in go out on the awl of breathing out and at least part extends into detect the sensor in the cavity. The perforated plate comprises a plurality of first perforations, a plurality of second perforations located at the periphery of the first perforations and an opening communicated with the detection cavity, the first perforations and the second perforations are communicated with the detection cavity, the size of the first perforations is smaller than that of the second perforations, and the size of the second perforations is smaller than that of the opening.

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

The exhaust aftertreatment package of the related art generally includes a housing, a number of exhaust aftertreatment carriers, and an exhaust cone assembly. The gas outlet cone assembly typically includes a gas outlet cone and a tailpipe on which a sensor (e.g., a NOx sensor) is mounted for sensing gases. Since the tail pipe is relatively close to the outside, in some application environments, water flow or the like easily enters the tail pipe to adversely affect the detection accuracy of the sensor, or even damage the sensor. In addition, because the distribution of the gas in the gas outlet cone is not uniform, how to improve the detection accuracy is also a technical problem faced by those skilled in the art.

Therefore, there is a need for improvements to existing exhaust aftertreatment packages.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a detect equal higher tail gas aftertreatment encapsulation of precision and reliability.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a tail gas aftertreatment encapsulation, its includes the casing, is located at least one tail gas treatment carrier in the casing and with the awl subassembly of giving vent to anger that the casing links to each other, the awl subassembly of giving vent to anger includes the gas cone, is fixed in porous plate in the gas cone, be located go out the gas cone with detection cavity between the porous plate and be fixed in go out on the gas cone and at least part extend into sensor in the detection cavity, wherein the porous plate includes a plurality of first perforation, is located a plurality of first fenestrate peripheral second perforate and with detect the opening that the cavity is linked together, a plurality of first perforation and a plurality of second perforate with it is linked together to detect the cavity, first fenestrate size is less than the fenestrate size of second, the fenestrate size of second is less than open-ended size.

As a further improved technical solution of the present invention, each of the first through holes has a size smaller than each of the second through holes, and each of the second through holes has a size smaller than the opening.

As a further improved technical solution, the opening certainly the outward flange of perforated plate to the regional sunken formation at a plurality of first perforation places, the position of sensor is located in the opening.

As a further improved technical scheme of the utility model, the opening has the bottom surface that is the arc.

As the utility model discloses further modified technical scheme, the perforated plate includes the main part and certainly a plurality of installation claws that form are bent to the edge of main part, the main part be the arc and to protrusion in the detection cavity, a plurality of first perforation and a plurality of second are perforated and are located the main part, a plurality of installation claws are used for being fixed in the casing.

As a further improved technical scheme of the utility model, a plurality of installation claws extend and surpass the play gas awl.

As a further improved technical scheme of the utility model, give vent to anger the awl subassembly include with the tail pipe that the awl links to each other gives vent to anger, wherein the region at a plurality of first perforation places corresponds to the tail pipe.

As the utility model discloses further modified technical scheme, the sensor is the NOx sensor.

As a further improved technical scheme of the utility model, the gas outlet cone is an eccentric cone.

As a further improved technical solution of the present invention, at least a portion of the plurality of second through holes is located between the plurality of first through holes and the opening in the radial direction of the gas outlet cone.

Compared with the prior art, the sensor of the utility model is arranged on the exhaust cone, so that the sensor is arranged at the upstream of the tail gas flowing direction as much as possible, the risk of water intrusion is reduced, and the reliability is improved; in addition, the utility model is provided with a perforated plate for adjusting the distribution of the air flow, the size of the first perforation is smaller than that of the second perforation, and the size of the second perforation is smaller than that of the opening; so set up, flow in the air current of going out the gas cone can be in under the effect of perforated plate flows into relatively evenly in detecting the cavity to detection precision has been improved.

Drawings

Fig. 1 is a schematic diagram of the exhaust aftertreatment package of the present invention in one embodiment.

Fig. 2 is a front view of the gas outlet cone assembly of the present invention in one embodiment.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a top view of fig. 2.

Fig. 5 is a rear view of fig. 2.

Fig. 6 is a schematic perspective view of an air outlet cone assembly according to an embodiment of the present invention.

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 a tail gas post-treatment package 100, which includes a housing 1, a plurality of tail gas treatment carriers located in the housing 1, an air inlet cone assembly 2 connected to one end of the housing 1, and an air outlet cone assembly 3 connected to the other end of the housing 1.

The plurality of exhaust gas treatment carriers include a diesel oxidation catalyst 11 (DOC), a diesel particulate filter 12 (DPF), a selective catalytic reduction device 13 (SCR), and the like.

Go out gas cone subassembly 3 including go out gas cone 4, be fixed in go out the perforated plate 5 in the gas cone 4, be located go out gas cone 4 with detection cavity 6 between the perforated plate 5, be fixed in go out on the gas cone 4 and at least part extend into detect sensor 7 in the cavity 6 and with the tail pipe 8 that goes out the gas cone 4 and link to each other.

In the illustrated embodiment of the present invention, the air outlet cone 4 is an eccentric cone.

The porous plate 5 includes a body 52 and a plurality of mounting claws 51 bent from the edge of the body 52. The main body 52 is arc-shaped and protrudes into the detection chamber 6 to better regulate the airflow. The mounting claws 51 are used to be fixed to the housing 1. In the illustrated embodiment of the present invention, the plurality of mounting claws 51 extend beyond the outlet cone 4.

The main body 52 includes a plurality of first through holes 521, a plurality of second through holes 522 located at the periphery of the plurality of first through holes 521, and an opening 523 communicating with the detection chamber 6. The first through holes 521 and the second through holes 522 are also communicated with the detection cavity 6 to adjust the back pressure. The area where the first plurality of perforations 521 is located corresponds to the tailpipe 8. The size of the first through hole 521 is smaller than that of the second through hole 522, and the size of the second through hole 522 is smaller than that of the opening 523. So set up, flow in the air current of going out the gas cone 4 can be in flow out from the top more under the effect of perforated plate 5, guarantee on the one hand near the velocity of flow of sensor 7 satisfies the designing requirement, and on the other hand can let gas carry out the secondary and mix, lets the gas that sensor 7 gathered is more even to detection accuracy has been improved. In one embodiment of the present invention, the sensor 7 is a NOx sensor.

Preferably, the size of each of the first through holes 521 is smaller than that of each of the second through holes 522, and the size of each of the second through holes 522 is smaller than that of the opening 523. The opening 523 is formed by recessing from the outer edge of the porous plate 5 to the region where the plurality of first through holes 521 are located. The position of the sensor 7 is located within the opening 523. The opening 523 has a bottom surface 5231 in the shape of an arc. At least a part of the second plurality of perforations 522 is located between the first plurality of perforations 521 and the opening 523 in a radial direction of the outlet cone 4 to adjust the gas flow distribution.

Compared with the prior art, the sensor 7 of the utility model is arranged on the gas outlet cone 4, so that the sensor 7 is arranged at the upstream of the tail gas flowing direction as much as possible, the risk of water intrusion is reduced, and the reliability is improved; in addition, the present invention is provided with a perforated plate 5 for adjusting the distribution of the air flow, the size of the first perforation 521 is smaller than the size of the second perforation 522, and the size of the second perforation 522 is smaller than the size of the opening 523; with the arrangement, the airflow flowing into the air outlet cone 4 can relatively uniformly flow into the detection cavity 6 under the action of the porous plate 5, so that the detection precision is improved.

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 a tail gas aftertreatment encapsulation, its includes the casing, be located at least one tail gas treatment carrier in the casing and with the awl subassembly of giving vent to anger that the casing links to each other which characterized in that: give vent to anger the awl subassembly including go out the gas awl, be fixed in go out the perforated plate in the gas awl, be located go out the gas awl with detection cavity between the perforated plate and be fixed in go out on the gas awl and at least part extend into sensor in the detection cavity, wherein the perforated plate includes a plurality of first perforation, is located a plurality of first fenestrate peripheral second perforate and with the opening that the detection cavity is linked together, a plurality of first perforation and a plurality of second perforate with the detection cavity is linked together, first fenestrate size is less than the fenestrate size of second, the fenestrate size of second is less than the open-ended size.

2. The exhaust aftertreatment package of claim 1, wherein: the size of each first perforation is smaller than that of each second perforation, and the size of each second perforation is smaller than that of the opening.

3. The exhaust aftertreatment package of claim 1, wherein: the opening is from the outward flange of perforated plate to the regional sunken formation in a plurality of first perforation places, the position of sensor is located in the opening.

4. The exhaust aftertreatment package of claim 3, wherein: the opening has a bottom surface that is curved.

5. The exhaust aftertreatment package of claim 1, wherein: the perforated plate comprises a main body part and a plurality of mounting claws formed by bending the edge of the main body part, the main body part is arc-shaped and protrudes into the detection cavity, the first perforations and the second perforations are arranged in the main body part, and the mounting claws are used for being fixed on the shell.

6. The exhaust aftertreatment package of claim 5, wherein: the mounting claws extend beyond the gas outlet cone.

7. The exhaust aftertreatment package of claim 1, wherein: the air outlet cone assembly comprises a tail pipe connected with the air outlet cone, wherein the area where the first through holes are located corresponds to the tail pipe.

8. The exhaust aftertreatment package of claim 1, wherein: the sensor is a NOx sensor.

9. The exhaust aftertreatment package of claim 1, wherein: the gas outlet cone is an eccentric cone.

10. The exhaust aftertreatment package of claim 1, wherein: at least some of the second plurality of perforations are located radially of the exit cone between the first plurality of perforations and the opening.