CN210686103U

CN210686103U - Exhaust gas aftertreatment device and working machine

Info

Publication number: CN210686103U
Application number: CN201921640993.3U
Authority: CN
Inventors: 福希尔·L·亚当; 坎杜拉·休曼; 韩艳鹏
Original assignee: Deere and Co
Current assignee: Deere and Co
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-06-05
Anticipated expiration: 2029-09-27

Abstract

The utility model provides an exhaust aftertreatment device and operation machinery. The exhaust gas aftertreatment device (100) is used for purifying exhaust gas from an engine (10), and includes: a housing (110) within which is disposed an exhaust treatment structure (120); an intake pipe (130) mounted to the housing to direct exhaust from an engine into the housing; and an outlet duct (140) mounted to the housing to direct treated exhaust gases away from the exhaust aftertreatment device. At least one of the inlet and outlet tubes is secured to the housing at least two locations spaced from each other along its length.

Description

Exhaust gas aftertreatment device and working machine

Technical Field

Embodiments of the present invention generally relate to the field of exhaust aftertreatment, and more particularly, to an exhaust aftertreatment device and a work machine equipped with the same.

Background

Exhaust gas aftertreatment devices are important components of various work machines (including vehicles, ships, etc.) for treating exhaust gas from engines to ensure that exhaust gas pollutants are below the limits of national emission regulations and to meet environmental protection requirements.

Exhaust aftertreatment devices typically have an intake pipe for receiving exhaust gases from an engine, an outlet pipe for discharging treated exhaust gases, and a body structure for treating the exhaust gases. In the conventional art, the intake duct and the exhaust duct are respectively connected to the body structure at a single position by various mounting or fixing structures to communicate with the inside of the body structure. A work machine equipped with an exhaust gas aftertreatment device may have various vibrations in operation, which are transmitted to the exhaust gas aftertreatment device, so that the intake pipe and the exhaust pipe are subjected to large stresses at the installation location, and such single-location connection causes the intake pipe and the exhaust pipe to be subjected to stresses that may exceed the allowable stress limits of the installation or fixing structure, may cause cracks, looseness, or even detachment from the body structure, which may adversely affect the exhaust gas treatment effect.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to overcome at least one of the above and other problems and disadvantages in the prior art.

In an aspect of the present invention, an embodiment proposes an exhaust gas aftertreatment device for purifying exhaust gas from an engine, comprising: a housing in which an exhaust gas treatment structure is provided; an intake pipe mounted to the housing to guide exhaust gas from an engine into the housing; and an outlet duct mounted to the housing to direct treated exhaust gases away from the exhaust aftertreatment device, at least one of the inlet and outlet ducts being secured to the housing at least two locations spaced apart from each other along its length.

In some embodiments, the at least one tube is secured to at least an inner wall of the housing.

In some embodiments, the housing is provided with an insertion hole through which the at least one tube is at least partially inserted into the housing.

In some embodiments, the at least one tube is sealingly secured to the housing at the insertion aperture.

In some embodiments, the air intake conduit includes an open first end for receiving exhaust from the engine and an opposite second end, and at least a portion of the air intake conduit is inserted within the housing such that the second end is secured to an inner wall of the housing.

In some embodiments, a pipe wall of the at least a portion of the intake pipe inserted into the housing on a side facing the exhaust treatment structure is provided with a plurality of through holes, so that at least a portion of the exhaust gas entering the intake pipe flows uniformly to the exhaust treatment structure through the plurality of through holes.

In some embodiments, the outlet conduit includes two opposing open ends, and at least a portion of the outlet conduit is inserted within the housing such that one of the two open ends is secured to an inner wall of the housing and the other open end is located outside the housing to direct treated exhaust gas to exit through the outlet conduit.

In some embodiments, a pipe wall of the at least a portion of the outlet pipe inserted into the housing on a side facing the exhaust gas treatment structure is provided with an opening, so that at least a portion of the exhaust gas treated by the exhaust gas treatment structure enters the outlet pipe through the opening to be discharged outward.

In some embodiments, the at least one tube is welded to the housing at the at least two locations.

In some embodiments, the exhaust treatment structure includes at least one of a catalytic converter and a particulate filter.

In another aspect of the present disclosure, an embodiment provides a work machine including an engine that generates exhaust gas in operation, and further including an exhaust gas aftertreatment device described in any embodiment of the present disclosure for purifying exhaust gas from the engine.

Other objects and advantages of the present invention will become apparent from the following detailed description of the invention, which proceeds with reference to the accompanying drawings, and can help to provide a thorough understanding of the present invention.

Drawings

The features and advantages of the invention may be more clearly understood by referring to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:

fig. 1 is an axial sectional perspective view schematically showing the structure of an exhaust aftertreatment device according to an exemplary embodiment of the invention;

fig. 2 is a sectional perspective view schematically showing the structure of an exhaust aftertreatment device according to an exemplary embodiment of the invention, with an intake pipe and an outlet pipe removed;

fig. 3 is a side perspective view schematically showing the structure of an intake pipe of an exhaust aftertreatment device according to an exemplary embodiment of the invention;

fig. 4 is a side perspective view schematically showing the structure of an outlet pipe of an exhaust aftertreatment device according to an exemplary embodiment of the invention; and

fig. 5 is a block diagram schematically showing the arrangement of an exhaust system for a work machine according to an exemplary embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

Fig. 1 schematically shows the structure of an exhaust gas aftertreatment device according to an exemplary embodiment of the invention. The exhaust gas post-treatment device 100 may be used in various working machines, such as excavators, loaders, harvesters, various transportation vehicles, ships, and the like, for purifying exhaust gas from the engine 10 (see fig. 5) so that pollutants in the purified exhaust gas are below the limits of national emission regulations, meet environmental protection requirements, and be discharged via the exhaust pipe 20. Illustratively, the engine may be an internal combustion engine, such as a diesel engine or a gasoline engine.

As shown, the exhaust aftertreatment device 100 generally includes a housing 110, an exhaust treatment structure 120 disposed within the housing, an inlet pipe 130, and an outlet pipe 140. As an example, the housing 110 may be a substantially tank-shaped or cylindrical container defining an internal space, and the intake pipe 130 and the outlet pipe 140 are both fixedly mounted to the housing 110 to communicate with the internal space of the housing, wherein the exhaust gas from the engine 10 enters the housing through the intake pipe 110, and the exhaust gas treated by the exhaust gas aftertreatment device exits the exhaust gas aftertreatment device through the outlet pipe 140. The inlet and outlet pipes may have a variety of shapes or arrangements as desired to accommodate the flow of exhaust gases (as indicated by the arrows in FIG. 1).

The exhaust treatment structure 120 disposed within the housing 110 may take a variety of forms, including at least one of a catalytic converter, a particulate filter, etc., depending on the exhaust purification needs. As shown in FIGS. 1 and 2, the exhaust treatment structure 120 includes a catalytic converter 121 (e.g., an oxidation catalytic converter, NO)_xA reduction catalytic converter, a three-way catalytic converter, etc.) and a particulate filter 122. The oxidation catalytic converter mainly oxidizes CO and HC (hydrocarbon) in the exhaust gas into CO₂And water, NO_xReduction catalytic converters are used primarily for reducing or eliminating NO contained in exhaust gases_x(Nitrogen oxide), may contain a nitrogen atom for the protection of NO_xAs the reduction catalyst for the reduction, for example, a vanadium-based catalyst or a zeolite-based catalyst can be used. It is also possible to do NO in the exhaust gas flow direction_xAn oxidation catalyst for purifying ammonia is provided on the downstream side of the catalyst. For the particulate filter 122For trapping particulate matter contained in the exhaust gas, a carbon particulate filter such as a Diesel Particulate Filter (DPF) may be used.

According to the embodiment of the present invention, the air inlet pipe 130 or the air outlet pipe 140, or both, are fixed to the housing 110 at least two locations, such as at least two locations spaced apart from each other along the length direction thereof, so that the stress points on the pipe can be dispersed when an external force caused by a factor such as vibration is applied, thereby reducing the stress near the pipe, for example, reducing the stress below the allowable stress, avoiding cracks, looseness, or even falling between the pipe and the housing, thereby providing reliable sealing fixation between the pipe and the housing, avoiding exhaust leakage, and ensuring a better exhaust treatment effect. For example, the inlet or outlet tube may be welded to the housing by means of a welding material at least two locations.

As an example, as shown in fig. 1, the inlet pipe 130 or the outlet pipe 140 fixed to the housing 110 at least two locations is fixed to an inner wall of the housing 110, for example, at one end or an outer wall surface of the pipe, to provide a better stabilizing effect.

As shown in fig. 1 and 2, the housing 110 is provided with

insertion holes

113, 114 through which at least one of the inlet and outlet pipes is at least partially inserted into the housing 110. The at least one tube may be sealingly fixed to the housing at the insertion hole. In the illustrated embodiment, the housing 110 is provided with two

insertion holes

113, 114 located substantially at opposite ends of the housing in the exhaust gas flow direction; the intake duct 130 is partially inserted into the housing 110 through the insertion hole 113 such that a portion thereof is positioned within the housing 110 and is sealingly fixed to the housing 110 at the insertion hole 113, as being sealingly welded to the housing 110 at the insertion hole 113; also, the outlet duct 120 is partially inserted into the housing 110 through the insertion hole 114 such that a portion thereof is positioned within the housing 110 and is sealingly fixed to the housing 110 at the insertion hole 114, such as being sealingly welded to the housing 110 at the insertion hole 114.

Thus, in the illustrated embodiment, the inlet pipe or the outlet pipe, or both, is fixed to the housing at the insertion hole on the one hand, and is also partially inserted into the housing on the other hand, and is fixed to the inner wall of the housing at other positions, so that by dispersing the stress points, the stress near the fixing position of the pipe can be significantly reduced, reducing the risk of exhaust gas leakage, as compared to a single position fixing.

As shown in fig. 1 and 3, the intake tube 130 includes a first end 131 and an opposite second end 132, the first end 131 being open to receive exhaust gases from the engine. As shown in FIG. 1, a portion of the air inlet conduit 130 is inserted within the housing 110 and secured to an inner wall of the housing 110 at a second end 132. It is understood that the air inlet pipe 130 may be fixed to the housing at other positions than the insertion hole 113 and the second end 132, such as an outer wall surface thereof.

In an exemplary embodiment, as shown in fig. 1 and 3, a plurality of through holes 133 are provided on a pipe wall of a portion of the intake pipe 130 inserted into the housing 110, the pipe wall facing the exhaust gas treatment structure 120, so that a part or all of the exhaust gas entering the intake pipe is uniformly distributed after passing through the plurality of through holes 133 to flow to the exhaust gas treatment structure 120, thereby enabling a more uniform exhaust gas treatment effect.

As shown in fig. 1 and 3, the outlet pipe 140 includes opposite

open ends

141, 142, and a portion of the outlet pipe 140 is inserted into the housing 110 such that one open end 141 is fixed to an inner wall of the housing 110 and the other open end 142 is located outside the housing to guide the treated exhaust gas to be discharged therethrough.

In an exemplary embodiment, as shown in fig. 1 and 3, a pipe wall of a portion of the outlet pipe 140 inserted into the housing 110 on a side facing the exhaust gas treatment structure 120 is provided with an opening 143, and at least a portion of the exhaust gas treated by the exhaust gas treatment structure 120 may enter the outlet pipe 140 via the opening 143 to flow out to the outside, so that the discharge of the treated exhaust gas may be accelerated.

Furthermore, an embodiment of the present invention also provides a working machine, such as an excavator, a loader, a harvester, etc., which includes an engine 10 generating exhaust gas during operation, and further includes an exhaust gas aftertreatment device described in any embodiment of the present invention, for purifying exhaust gas from the engine 10, so that pollutants in the purified exhaust gas are lower than the limit of national emission regulations, and are discharged via an exhaust pipe 20, as shown in fig. 5.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. An exhaust gas aftertreatment device (100) for purifying exhaust gas from an engine (10), comprising:

a housing (110) within which is disposed an exhaust treatment structure (120);

an intake pipe (130) mounted to the housing to direct exhaust from an engine into the housing; and

an outlet duct (140) mounted to the housing to direct treated exhaust gases away from the exhaust aftertreatment device,

characterized in that at least one of the inlet and outlet tubes is fixed to the housing at least two locations spaced from each other along its length.

2. The exhaust aftertreatment device of claim 1, wherein the at least one tube is secured to at least an inner wall of the housing.

3. Exhaust aftertreatment device according to claim 1, characterized in that the housing is provided with an insertion hole (113, 114) through which the at least one pipe is at least partially inserted into the housing.

4. The exhaust aftertreatment device of claim 3, wherein the at least one tube is sealingly secured to the housing at the insert aperture.

5. The exhaust aftertreatment device of claim 1,

the intake pipe includes an open first end (131) for receiving exhaust gases from the engine and an opposite second end (132), and

at least a portion of the air inlet tube is inserted into the housing such that the second end is secured to an inner wall of the housing.

6. The exhaust aftertreatment device of claim 5, wherein a wall of the at least a portion of the intake pipe inserted into the housing on a side of the exhaust gas treatment structure is provided with a plurality of through holes (133) such that at least a portion of the exhaust gas entering the intake pipe flows uniformly through the plurality of through holes to the exhaust gas treatment structure.

7. The exhaust aftertreatment device of claim 1,

the outlet pipe comprises two opposite open ends (141, 142), and

at least a portion of the outlet tube is inserted into the housing such that one of the two open ends is secured to an inner wall of the housing and the other open end is located outside the housing to direct treated exhaust gas to exit through the outlet tube.

8. The exhaust aftertreatment device of claim 7, wherein a wall of the at least a portion of the outlet duct inserted into the housing on a side facing the exhaust treatment structure is provided with an opening (143) such that at least a portion of exhaust treated via the exhaust treatment structure enters the outlet duct via the opening to be discharged outwardly.

9. The exhaust aftertreatment device of any one of claims 1-8, wherein the at least one tube is welded to the housing at the at least two locations.

10. Exhaust aftertreatment device according to any one of claims 1-8, characterized in that the exhaust gas treatment structure comprises at least one of a catalytic converter (121) and a particle filter (122).

11. A work machine including an engine (10) that generates exhaust gas in operation, characterized by further comprising:

exhaust gas aftertreatment device according to any one of claims 1 to 10 for the clean-up treatment of exhaust gases from an engine (10).