CN217270402U

CN217270402U - Aftertreatment assembly and engine

Info

Publication number: CN217270402U
Application number: CN202121964280.XU
Authority: CN
Inventors: 梁成奇; 祝成祥; 韩腾; 高衍潇; 贾帅帅
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-08-23
Anticipated expiration: 2031-08-20

Abstract

The utility model discloses a aftertreatment assembly and engine relates to engine exhaust aftertreatment technical field. The post-treatment assembly comprises an oxidation catalyst, a particle catcher, an exhaust end cover and a differential pressure sensor, wherein the oxidation catalyst is used for purifying waste gas entering the post-treatment assembly; the particle catcher is connected with the oxidation catalyst and is used for catching particles in the exhaust gas; the exhaust end cover is connected with the particle catcher and is provided with an exhaust outlet; the pressure difference sensor is used for detecting the pressure difference at two ends of the particle catcher and comprises an upstream pressure acquisition end and a downstream pressure acquisition end, the upstream pressure acquisition end is connected with the oxidation catalyst, and the downstream pressure acquisition end is connected with the exhaust end cover; by rotating the exhaust end cap, the position of the exhaust outlet can be changed relative to the particulate trap. The direction of the exhaust outlet of the post-treatment assembly is adjustable, the arrangement requirements of different complete machines are met, and the adaptability of the post-treatment assembly is improved.

Description

Aftertreatment assembly and engine

Technical Field

The utility model relates to an engine exhaust aftertreatment technical field especially relates to a aftertreatment assembly and engine.

Background

After the diesel engine for the engineering machinery is discharged and upgraded, an exhaust system needs to adopt an external purification technology, such as adding a DOC-DPF assembly. However, the diesel engines are arranged differently on different complete machines, and the difference between the structure of the complete machine and the structure of the hood causes that the aftertreatment assembly cannot meet the diversified arrangement requirements of different complete machines due to the limitation of the exhaust outlet direction.

As shown in fig. 1, an upstream pressure collecting end of a differential pressure sensor 5 in an aftertreatment assembly in the prior art is connected to an oxidation catalyst 2, a downstream pressure collecting end is connected to an exhaust end cover 4, a downstream mounting seat 10 is arranged in a circumferential direction of the exhaust end cover 4, and the downstream pressure collecting end is connected to the exhaust end cover 4 through the downstream mounting seat 10. Such arrangement restricts the direction of the exhaust outlet 41, and the direction of the exhaust outlet 41 cannot be adjusted according to the requirements of the arrangement of the whole machine.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an aftertreatment assembly and engine, the demand adjustment that the direction of the exhaust outlet of this aftertreatment assembly can arrange according to the complete machine for it is more nimble to use the mounted position of this aftertreatment assembly carminative engine on the complete machine.

To achieve the purpose, the utility model adopts the following technical proposal:

an aftertreatment assembly, comprising:

an oxidation catalyst for purifying exhaust gas entering the aftertreatment assembly;

a particle trap connected with the oxidation catalyst for trapping particles in the exhaust gas;

the exhaust end cover is connected with the particle catcher and is provided with an exhaust outlet;

the pressure difference sensor is used for detecting the pressure difference between the two ends of the particle catcher and comprises an upstream pressure acquisition end and a downstream pressure acquisition end, the upstream pressure acquisition end is connected with the oxidation catalyst, and the downstream pressure acquisition end is connected with the exhaust end cover; the position of the exhaust outlet can be changed relative to the particulate trap by rotating the exhaust end cap.

As a preferable scheme of the aftertreatment assembly, a downstream mounting seat is arranged at the central position of one end, far away from the particle catcher, of the exhaust end cover, and the downstream pressure collecting end is connected with the exhaust end cover through the downstream mounting seat.

As a preferred embodiment of the aftertreatment assembly, the exhaust end cover is provided with a plurality of downstream mounting seats in the circumferential direction, and the downstream pressure collection end can be selectively connected with one of the downstream mounting seats.

As a preferable scheme of the aftertreatment assembly, an upstream mounting seat is arranged on the oxidation catalyst, and the upstream pressure collecting end is connected with the oxidation catalyst through the upstream mounting seat.

As a preferable mode of the aftertreatment assembly, the upstream mounting seat is connected to the upstream pressure collection end through an upstream gas extraction pipe, and the downstream mounting seat is connected to the downstream pressure collection end through a downstream gas extraction pipe.

As a preferable scheme of the aftertreatment assembly, the upstream mounting seat and the downstream mounting seat are both provided with hollow studs, the upstream gas taking pipe penetrates through an inner hole of the upstream mounting seat and extends into the oxidation catalyst, and the periphery of the upstream mounting seat is in threaded connection with the oxidation catalyst; the downstream air intake pipe penetrates through an inner hole of the downstream mounting seat and extends into the exhaust end cover, and the periphery of the downstream mounting seat is in threaded connection with the exhaust end cover.

As a preferable scheme of the aftertreatment assembly, the aftertreatment assembly further comprises a first supporting piece and a second supporting piece, one end of the first supporting piece is fixed on the oxidation catalyst, and the other end of the first supporting piece is used for supporting the upstream gas taking pipe; one end of the second supporting piece is fixed on the particle catcher, and the other end of the second supporting piece is used for supporting the downstream air intake pipe.

As a preferred embodiment of the aftertreatment assembly, the particle trap is connected to the exhaust end cap by a clamp.

As a preferred aspect of the aftertreatment assembly, a seal is disposed between the particulate trap and the exhaust end cap.

An engine comprising an aftertreatment assembly according to any preceding aspect.

The utility model has the advantages that:

the utility model provides a post-processing assembly purifies waste gas through oxidation catalyst converter, and through the particle trap particle in order to get rid of waste gas of the waste gas entering of purification, then the exhaust outlet discharge on the exhaust end cover to satisfy the exhaust requirement. The upstream pressure acquisition end of the pressure difference sensor is connected with the oxidation catalyst and used for acquiring the pressure at the upstream of the particle trap, and the downstream pressure acquisition end is connected with the exhaust end cover and used for acquiring the pressure at the downstream of the particle trap and judging whether the particle trap is blocked or removed by detecting the pressure difference at the two ends of the particle trap. Set up the exhaust end cover into the rotation and can change the exhaust outlet direction to satisfy the arrangement demand of different complete machines, and change the exhaust outlet direction, do not influence being connected of low reaches pressure acquisition end and exhaust end cover. The utility model provides a post-processing assembly, the direction of exhaust outlet is adjustable, satisfies the demand of arranging of different complete machines, has improved the suitability of post-processing assembly, and the product management of being convenient for simultaneously need not to set up the product of isostructure because of exhaust outlet's difference.

The utility model provides an engine uses foretell aftertreatment assembly, and the direction of exhaust outlet is unrestricted to make the engine arrange on the complete machine more nimble, can satisfy the diversified demand of arranging of different complete machines.

Drawings

FIG. 1 is a front view of a prior art aftertreatment assembly;

FIG. 2 is a front view of an aftertreatment assembly in accordance with an embodiment of the invention;

FIG. 3 is a side view of an aftertreatment assembly according to an embodiment of the invention;

FIG. 4 is a cross-sectional view of an aftertreatment assembly in accordance with an embodiment of the invention;

fig. 5 is a schematic structural diagram of a post-treatment assembly according to a second embodiment of the present invention.

In the figure:

1. an air inlet end cover; 2. an oxidation catalyst; 3. a particle trap; 4. an exhaust end cap; 5. a differential pressure sensor; 6. a first temperature sensor; 7. a second temperature sensor; 8. clamping a hoop; 9. an upstream mount; 10. a downstream mount;

11. an air inlet; 41. an exhaust outlet; 51. an upstream gas taking pipe; 52. a downstream gas intake pipe; 53. a first support member; 54. a second support member.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Example one

As shown in FIG. 2, the present embodiment provides an aftertreatment assembly including an intake end cap 1, an oxidation catalyst 2, a particulate trap 3, an exhaust end cap 4, and a differential pressure sensor 5. An air inlet 11 is arranged on the air inlet end cover 1, and the air inlet 11 is connected with an exhaust port of an engine so that exhaust gas discharged by the engine enters the aftertreatment assembly. One end of the oxidation catalyst 2 is connected with the air inlet end cover 1, and the other end is connected with the particle catcher 3. The oxidation catalyst 2 purifies the exhaust gas entering the post-treatment assembly through an oxidation catalytic reaction. The particulate trap 3 serves to trap particulates in the exhaust gas. The exhaust end cover 4 is connected with the particle catcher 3, an exhaust outlet 41 is arranged on the exhaust end cover 4, and the exhaust gas treated by the oxidation catalyst 2 and the particle catcher 3 is discharged into the atmosphere through the exhaust outlet 41. The differential pressure sensor 5 is used for detecting the differential pressure at two ends of the particle catcher 3, the differential pressure sensor 5 comprises an upstream pressure acquisition end and a downstream pressure acquisition end, the upstream pressure acquisition end is connected with the oxidation catalytic converter 2, and the downstream pressure acquisition end is connected with the exhaust end cover 4. By rotating the exhaust end cap 4, the position of the exhaust outlet 41 can be changed relative to the particle trap 3.

The aftertreatment assembly provided by the embodiment purifies exhaust gas through the oxidation catalyst 2, and the purified exhaust gas enters the particulate filter 3 to remove particles in the exhaust gas and then is discharged through the exhaust outlet 41 on the exhaust end cover 4 to meet the exhaust requirement. The upstream pressure detection end of the differential pressure sensor 5 is connected to the oxidation catalytic converter 2 for detecting the pressure upstream of the particle trap 3. The downstream pressure collection end is connected with the exhaust end cover 4 and is used for collecting the pressure at the downstream of the particle catcher 3 and judging whether the particle catcher 3 is blocked or removed by detecting the pressure difference at the two ends of the particle catcher 3. The exhaust end cover 4 is set to rotate to change the direction of the exhaust outlet 41 so as to meet the arrangement requirements of different complete machines, and the direction of the exhaust outlet 41 is changed without influencing the connection between the downstream pressure acquisition end and the exhaust end cover 4. The aftertreatment assembly that this embodiment provided, exhaust outlet 41's direction is adjustable, satisfies the demand of arranging of different complete machines, has improved the suitability of aftertreatment assembly, and the product management of being convenient for simultaneously need not to set up the product of isostructure because of exhaust outlet 41's difference.

In the embodiment, one end of the oxidation catalyst 2 close to the air inlet end cover 1 is provided with a first temperature sensor 6, and the first temperature sensor 6 is used for detecting the temperature of the gas entering the oxidation catalyst 2; the oxidation catalytic converter 2 is provided with a second temperature sensor 7 at its end adjacent to the particle trap 3, which second temperature sensor 7 is used to detect the temperature of the gas exiting the oxidation catalytic converter 2. The first temperature sensor 6 and the second temperature sensor 7 are provided for monitoring the exhaust gas temperature.

The particle catcher 3 can filter most particles, but the particles are accumulated in the particle catcher 3 during the operation of the particle catcher 3, so that the exhaust back pressure of the engine is increased, when the exhaust back pressure exceeds a certain value, the operation of the engine starts to be obviously deteriorated, so that the performance of the engine, such as the dynamic performance, the economic performance and the like, is reduced, the deposited particles must be removed in time, and the particle catcher 3 is recovered to the original operation state, namely the regeneration of the particle catcher 3.

As a preferred embodiment of the aftertreatment assembly, the particle trap 3 is connected to the exhaust end cap 4 by means of a clamp 8. Because the particle catcher 3 has regeneration requirements, in the post-processing assembly, one end of the particle catcher 3 is connected with the oxidation catalyst 2 through the hoop 8, and the other end of the particle catcher 3 is connected with the exhaust end cover 4 through the hoop 8, so that the particle catcher 3 can be conveniently disassembled. Meanwhile, in the embodiment, the arrangement of the clamp 8 is also convenient for adjusting the direction of the exhaust outlet 41 on the exhaust end cover 4, when the exhaust end cover is installed, the direction of the exhaust outlet 41 can be adjusted according to the arrangement requirement of the whole machine, and then the exhaust end cover 4 and the particle trap 3 are fixed through the clamp 8.

In order to ensure the tightness of the gas when the exhaust gas is treated by the aftertreatment assembly, a sealing element is arranged between the particle trap 3 and the exhaust end cover 4. In the present embodiment, the end of the particle trap 3 that is connected to the oxidation catalyst 2 is also provided with a seal. The sealing element is a sealing ring or a sealing gasket.

In order to enable the exhaust outlet 41 on the exhaust end cover 4 to be adjusted according to the arrangement requirement of the whole machine, the problem that the connection between the downstream pressure collecting end of the differential pressure sensor 5 and the exhaust end cover 4 is limited due to the adjustment of the exhaust outlet 41 in the prior art is solved.

As shown in fig. 3, as a preferred embodiment of the aftertreatment assembly, a downstream mounting seat 10 is arranged at the central position of one end of the exhaust end cover 4 far away from the particle catcher 3, and the downstream pressure collecting end is connected with the exhaust end cover 4 through the downstream mounting seat 10. The downstream mounting base 10 is arranged at the central position of the exhaust end cover 4, and no matter how the exhaust end cover 4 rotates, the position of the downstream mounting base 10 is always unchanged, so that the requirements of different angles of the exhaust outlet 41 are met, and the connection between the downstream pressure acquisition end of the differential pressure sensor 5 and the exhaust end cover 4 is not influenced.

As a preferable mode of the aftertreatment assembly, the oxidation catalyst 2 is provided with an upstream mounting seat 9, and the upstream pressure collection end is connected with the oxidation catalyst 2 through the upstream mounting seat 9. The upstream mounting 9 is arranged on the oxidation catalyst 2 such that the upstream pressure collection end is able to collect the pressure upstream of the particle trap 3.

With continued reference to fig. 2, in the present embodiment, the upstream mounting seat 9 is connected to the upstream pressure-collecting end through an upstream gas-taking pipe 51, and the downstream mounting seat 10 is connected to the downstream pressure-collecting end through a downstream gas-taking pipe 52. The differential pressure sensor 5 is fixed on the oxidation catalytic converter 2, an upstream pressure acquisition end and a downstream pressure acquisition end are both arranged on the differential pressure sensor 5, the upstream pressure acquisition end cannot be directly connected with the upstream mounting seat 9 and the downstream pressure acquisition end cannot be directly connected with the downstream mounting seat 10 due to distance, and the gas upstream of the particle trap 3 is transmitted to the upstream pressure acquisition end by arranging the upstream gas taking pipe 51 so as to test the upstream gas pressure; the gas downstream of the particle trap 3 is conveyed to a downstream pressure collection end by providing a downstream gas take-off pipe 52 to test the downstream gas pressure.

In this embodiment, the aftertreatment assembly further includes a first support 53 and a second support 54, one end of the first support 53 is fixed on the oxidation catalyst 2, and the other end is used for supporting the upstream gas intake pipe 51; the second support member 54 has one end fixed to the particle catcher 3 and the other end for supporting the downstream air-taking pipe 52. The first support 53 is arranged to fix the position of the upstream air intake pipe 51 in the post-processing assembly, and the second support 54 is arranged to fix the position of the downstream air intake pipe 52 in the post-processing assembly, so that the differential pressure sensor 5 does not influence the detection accuracy due to the interference of foreign objects.

In this embodiment, the first support 53 and the second support 54 each include a support rod and a fixing ring, one end of the support rod of the first support 53 is fixed to the oxidation catalyst 2, the other end of the support rod is fixed to the fixing ring, and the upstream gas intake pipe 51 passes through the fixing ring and is connected to the upstream mounting seat 9. One end of a support rod of the second support member 54 is fixed on the particle catcher 3, the other end is fixed with a fixing ring, and the downstream air intake pipe 52 passes through the fixing ring to be connected with the downstream mounting seat 10.

As shown in fig. 4, as a preferred embodiment of the aftertreatment assembly, the upstream mounting seat 9 and the downstream mounting seat 10 are both provided as hollow studs, the upstream gas extraction pipe 51 penetrates through an inner hole of the upstream mounting seat 9 and extends into the oxidation catalyst 2, and the periphery of the upstream mounting seat 9 is screwed with the oxidation catalyst 2; the downstream air intake pipe 52 extends into the exhaust end cover 4 through the inner hole of the downstream mounting base 10, and the periphery of the downstream mounting base 10 is in threaded connection with the exhaust end cover 4. In this embodiment, the upstream air intake pipe 51 is in interference fit with the inner hole of the upstream mounting seat 9, and the downstream air intake pipe 52 is in interference fit with the inner hole of the downstream mounting seat 10, so as to ensure air tightness.

The embodiment also provides an engine comprising the aftertreatment assembly. The engine provided by the embodiment adopts the aftertreatment assembly, and the direction of the exhaust outlet 41 is not limited, so that the engine is more flexibly arranged on the whole machine, and the diversified arrangement requirements of different whole machines can be met.

Example two

This embodiment provides an aftertreatment assembly that is substantially identical in construction to the aftertreatment assembly provided in the first embodiment, except that the downstream mounting pad 10 is disposed at a location slightly different from the location of the downstream mounting pad 10 of the first embodiment.

As shown in fig. 5, the present embodiment provides an aftertreatment assembly having a plurality of downstream mounting seats 10 disposed circumferentially about the exhaust end cover 4, and a downstream pressure collection end selectively connectable to one of the downstream mounting seats 10. When the post-processing assembly is assembled, the position of the exhaust outlet 41 can be adjusted according to the requirement of the whole machine on the exhaust outlet 41, then the exhaust outlet is fixed with the particle trap 3 through the hoop 8, the downstream pressure acquisition end is connected with one of the downstream installation bases 10 matched with the downstream pressure acquisition end through the downstream air intake pipe 52, and then other downstream installation bases 10 are subjected to plugging treatment.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. An aftertreatment assembly, comprising:

an oxidation catalyst (2) for purifying exhaust gas entering the aftertreatment assembly;

a particle trap (3) connected to the oxidation catalyst (2) for trapping particles in the exhaust gas;

the exhaust end cover (4) is connected with the particle catcher (3), and an exhaust outlet (41) is formed in the exhaust end cover (4);

the pressure difference sensor (5) is used for detecting the pressure difference between two ends of the particle catcher (3), the pressure difference sensor (5) comprises an upstream pressure acquisition end and a downstream pressure acquisition end, the upstream pressure acquisition end is connected with the oxidation catalyst (2), and the downstream pressure acquisition end is connected with the exhaust end cover (4); rotating the exhaust end cap (4), the position of the exhaust outlet (41) can be changed relative to the particle trap (3).

2. An aftertreatment assembly according to claim 1, wherein the exhaust end cap (4) is provided with a downstream mounting (10) at a central location of an end remote from the particulate trap (3), the downstream pressure pick-up end being connected to the exhaust end cap (4) via the downstream mounting (10).

3. An aftertreatment assembly according to claim 1, wherein the exhaust end cover (4) is circumferentially provided with a plurality of downstream mounts (10), the downstream pressure pick-up end being selectively connectable with one of the downstream mounts (10).

4. Aftertreatment assembly according to claim 2 or 3, wherein an upstream mounting seat (9) is provided on the oxidation catalyst (2), the upstream pressure pick-up end being connected with the oxidation catalyst (2) by the upstream mounting seat (9).

5. The aftertreatment assembly according to claim 4, wherein the upstream mounting seat (9) is connected to the upstream pressure pick-up end by an upstream gas extraction tube (51) and the downstream mounting seat (10) is connected to the downstream pressure pick-up end by a downstream gas extraction tube (52).

6. The aftertreatment assembly of claim 5, wherein the upstream mount (9) and the downstream mount (10) are each provided as hollow studs, the upstream gas extraction tube (51) extends into the oxidation catalyst (2) through an inner bore of the upstream mount (9), and an outer periphery of the upstream mount (9) is in threaded engagement with the oxidation catalyst (2); the downstream air intake pipe (52) penetrates through an inner hole of the downstream mounting seat (10) and extends into the exhaust end cover (4), and the periphery of the downstream mounting seat (10) is in threaded connection with the exhaust end cover (4).

7. Aftertreatment assembly according to claim 5, further comprising a first support (53) and a second support (54), the first support (53) being fixed at one end to the oxidation catalyst (2) and at the other end for supporting the upstream gas take-off pipe (51); one end of the second supporting piece (54) is fixed on the particle catcher (3), and the other end is used for supporting the downstream air taking pipe (52).

8. Aftertreatment assembly according to claim 1, wherein the particle trap (3) is connected to the exhaust end cap (4) by means of a clamp (8).

9. Aftertreatment assembly according to claim 8, wherein a seal is provided between the particle trap (3) and the exhaust end cover (4).

10. An engine comprising an aftertreatment assembly according to any one of claims 1 to 9.