Tail gas after-treatment device and tail gas after-treatment device assembly

Abstract

A tail gas after-treatment device comprises a shell, a tail gas after-treatment carrier and a check ring. And the tail gas after-treatment carrier is packaged in the shell along the axial direction of the shell. The check ring comprises a base part and a flanging part. The base part is provided with an airflow opening and a plurality of clamping pieces. The airflow opening corresponds to the tail gas aftertreatment carrier so that airflow flowing through the tail gas aftertreatment carrier can pass through the airflow opening. The clamping piece is provided with a clamping groove penetrating through the clamping piece. And the flanging part is fixed on the inner wall of the shell. The clamping groove is configured to be matched with a handle detachably connected to the check ring. Compared with the prior art, the air conditioner is provided with the handle detachably connected to the check ring, so that the influence of the handle on airflow is avoided, and the cost is saved. The invention further discloses a tail gas after-treatment device assembly with the tail gas after-treatment device.

Description

Technical Field

[0001] This invention relates to an exhaust gas aftertreatment device and exhaust gas aftertreatment device components, belonging to the field of engine exhaust gas aftertreatment technology. Background Technology

[0002] Exhaust aftertreatment device components in related technologies typically include a housing, a first exhaust aftertreatment carrier (e.g., a diesel oxidation catalyst carrier, DOC) encapsulated in the housing, a second exhaust aftertreatment assembly (e.g., a diesel particulate filter assembly, DPF) detachably mounted in the housing and located downstream of the first exhaust aftertreatment carrier, a third exhaust aftertreatment assembly (e.g., a selective catalytic reduction assembly, SCR) located downstream of the second exhaust aftertreatment assembly, and a mixer located between the second exhaust aftertreatment assembly and the third exhaust aftertreatment assembly.

[0003] The second exhaust gas aftertreatment assembly includes a housing, a second exhaust gas aftertreatment carrier encapsulated within the housing, and a handle directly or indirectly fixed to the housing and located at one end of the second exhaust gas aftertreatment carrier. The handle is used to pull the second exhaust gas aftertreatment assembly out of the housing to facilitate the installation and maintenance of the second exhaust gas aftertreatment assembly.

[0004] However, in related technologies, the handle is directly or indirectly fixed to the outer casing, and the handle is inevitably located in the airflow path, which has a certain impact on the airflow. In addition, since the handle is only needed when installing and maintaining the second exhaust gas aftertreatment component, the non-removable handle design in related technologies increases the cost. Summary of the Invention

[0005] The purpose of this invention is to provide a low-cost exhaust gas aftertreatment device and exhaust gas aftertreatment device components.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an exhaust gas aftertreatment device, comprising: A housing, wherein the housing is provided with a receiving space; An exhaust gas aftertreatment carrier, wherein the exhaust gas aftertreatment carrier is encapsulated within the housing along the axial direction of the housing; and A retaining ring is fixed to the housing and is located at one end of the exhaust gas aftertreatment carrier along the axial direction. The retaining ring can limit the axial movement of the exhaust gas aftertreatment carrier. The retaining ring includes a base and a flange. The base is provided with an airflow opening and a plurality of retaining pieces. The airflow opening corresponds to the exhaust gas aftertreatment carrier to allow airflow passing through the exhaust gas aftertreatment carrier to pass through. The retaining pieces are provided with retaining grooves that penetrate the retaining pieces. The flange is fixed to the inner wall of the housing. The retaining slot is configured to engage with a handle that is detachably connected to the retaining ring.

[0007] As a further improvement of the present invention, the housing includes a main body, a contraction portion connected to one end of the main body, a transition portion connected to the other end of the main body, a raised portion connected to the transition portion, and an end wall portion connected to the raised portion; the contraction portion is used to guide the exhaust gas aftertreatment device into the corresponding mounting housing; the exhaust gas aftertreatment carrier is encapsulated in the main body; the raised portion is used to abut against the mounting housing; and the flange portion is welded and fixed to the inner wall of the end wall portion.

[0008] As a further improvement of the present invention, the retaining piece is integrally stamped from the base, and the retaining piece is perpendicular to the base.

[0009] As a further improvement of the present invention, the base is provided with a notch located on one side of the retaining piece and close to the retaining piece; the retaining groove is rectangular.

[0010] As a further improvement of the present invention, the exhaust gas aftertreatment device includes a gasket located radially between the housing and the exhaust gas aftertreatment carrier. The exhaust gas aftertreatment device further includes a steel wool ring located between the exhaust gas aftertreatment carrier and the baffle ring along the axial direction. The steel wool ring has a through hole corresponding to the airflow opening. The steel wool ring is welded and fixed to one side of the base. The steel wool ring and the flange are located on both sides of the base along the axial direction. The exhaust gas aftertreatment carrier abuts against the steel wool ring. The steel wool ring does not contact the housing along the radial direction.

[0011] As a further improvement of the present invention, both the perforation and the airflow opening are circular, and the diameter of the perforation is larger than the diameter of the airflow opening.

[0012] The present invention also discloses an exhaust gas aftertreatment device assembly, comprising: An exhaust gas aftertreatment device, wherein the exhaust gas aftertreatment device is the aforementioned exhaust gas aftertreatment device; and A handle, which is detachably attached to the retaining ring, for disassembling the exhaust aftertreatment device.

[0013] As a further improved technical solution of the present invention, the retaining piece includes a first retaining piece and a second retaining piece, and the retaining groove includes a first retaining groove penetrating the first retaining piece and a second retaining groove penetrating the second retaining piece; The handle includes a generally U-shaped force-applying rod, a first mounting base at one end of the force-applying rod, a second mounting base at the other end of the force-applying rod, a first locking assembly mounted in the first mounting base, and a second locking assembly mounted in the second mounting base. The first mounting base and the first locking assembly at least partially pass through the first retaining groove, and the second mounting base and the second locking assembly at least partially pass through the second retaining groove.

[0014] As a further improvement of the present invention, the first mounting base is provided with a first mounting hole; The first locking assembly includes a first stop ball mounted in the first mounting hole and protruding from the first mounting base, a first spring mounted in the first mounting hole and abutting against the first stop ball, and a first screw fixed to the first mounting base and abutting against the first spring; the first spring is capable of adjusting the distance by which the first stop ball protrudes from the first mounting base; the first stop ball passes through the first retaining groove to retain the back of the first retaining piece.

[0015] As a further improvement of the present invention, the second mounting base is provided with a second mounting hole; The second locking assembly includes a second stop ball mounted in the second mounting hole and protruding from the second mounting base, a second spring mounted in the second mounting hole and abutting against the second stop ball, and a second screw fixed to the second mounting base and abutting against the second spring; the second spring is capable of adjusting the distance by which the second stop ball protrudes from the second mounting base; the second stop ball passes through the second retaining groove to retain the back of the second retaining piece.

[0016] Compared to existing technologies, the exhaust aftertreatment device and its assembly of the present invention are provided with a handle detachably connected to the retaining ring. This design has two advantages: firstly, when the exhaust aftertreatment device is installed on a vehicle, the handle is not included, thus avoiding any impact on airflow and saving costs; secondly, when the exhaust aftertreatment device needs to be disassembled, the handle is connected to the retaining ring to facilitate disassembly. The handle functions as a tool, avoiding the increased cost of connecting a handle to each exhaust aftertreatment device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the exhaust gas aftertreatment device components of the present invention during disassembly; Figure 2 yes Figure 1 The right view; Figure 3 It is along Figure 2 Schematic diagram of the cross section of line AA in the middle; Figure 4 It is along Figure 2 Schematic diagram of the cross section of the middle BB line; Figure 5 yes Figure 1 Partial exploded 3D diagram; Figure 6 yes Figure 5 Further exploded view; Figure 7 yes Figure 6 A 3D exploded view of one of the handles; Figure 8 yes Figure 5 A top view of one of the handles; Figure 9 It is along Figure 8 Schematic diagram of the cross section of the CC line; Figure 10 yes Figure 6 A 3D schematic diagram of the center guard ring; Figure 11 yes Figure 10 Top view; Figure 12 It is along Figure 11 Schematic diagram of the cross section of the DD line; Figure 13 It is along Figure 11 A cross-sectional schematic diagram of the EE line. Detailed Implementation

[0018] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Where several specific embodiments exist, features in these embodiments may be combined with each other without conflict. When the description relates to the accompanying drawings, unless otherwise stated, the same numbers or symbols in different drawings denote the same or similar elements. The descriptions in the following exemplary embodiments do not represent all embodiments of the present invention; rather, they are merely examples of products consistent with the present invention as set forth in the claims.

[0019] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of protection of this invention. It should be understood that terms such as "first," "second," and similar words used in the specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish features.

[0020] Please refer to Figures 1 to 13 As shown, the present invention discloses an exhaust aftertreatment device assembly, which includes an exhaust aftertreatment device 100 and a plurality of handles 200 detachably mounted on the exhaust aftertreatment device 100.

[0021] The exhaust aftertreatment device 100 includes a housing 1, an exhaust aftertreatment carrier 2 encapsulated in the housing 1 along the axial direction of the housing 1, a gasket 3 located between the housing 1 and the exhaust aftertreatment carrier 2 along the radial direction of the housing 1, and a retaining ring assembly 4 fixed to the housing 1 and located at one end of the exhaust aftertreatment carrier 2 along the axial direction.

[0022] In the embodiment illustrated in the present invention, the housing 1 is provided with a receiving space 10, and the exhaust gas aftertreatment carrier 2 is at least partially encapsulated in the receiving space 10 by the gasket 3.

[0023] Specifically, the housing 1 includes a main body 11, a contraction portion 12 connected to one end of the main body 11, a transition portion 13 connected to the other end of the main body 11, a raised portion 14 connected to the transition portion 13, and an end wall portion 15 connected to the raised portion 14. The contraction portion 12 guides the exhaust gas aftertreatment device 100 into a corresponding mounting housing (not shown). The exhaust gas aftertreatment carrier 2 is encapsulated in the main body 11. The raised portion 14 abuts against the mounting housing and is assembled and fixed by clamps.

[0024] The retaining ring assembly 4 includes a retaining ring 41 and a steel wool ring 42. The retaining ring 41 is fixed to the housing 1 and is located at one end of the exhaust gas aftertreatment carrier 2 along the axial direction. The retaining ring 41 can limit the axial movement of the exhaust gas aftertreatment carrier 2. The retaining ring 41 includes a base 411 and a flanged portion 412. In the embodiment illustrated in this invention, the retaining ring 41 has a slot 410, which gives the retaining ring 41 better elastic deformation capability. The base 411 has an airflow opening 4111 and a plurality of retaining pieces 4112. The airflow opening 4111 corresponds to the exhaust gas aftertreatment carrier 2 to allow the airflow flowing through the exhaust gas aftertreatment carrier 2 to pass through. The retaining pieces 4112 have retaining grooves that penetrate the retaining pieces 4112. The retaining pieces 4112 are integrally stamped from the base 411 and are perpendicular to the base 411. The retaining groove is configured to engage with a handle 200 detachably connected to the retaining ring 41. The base 411 has a notch 4113 located on one side of the retaining piece 4112 and close to the retaining piece 4112 to facilitate bending to form the retaining piece 4112. In the embodiment illustrated in the present invention, the retaining groove is rectangular.

[0025] The steel wool ring 42 is located axially between the exhaust gas aftertreatment carrier 2 and the baffle ring 41, and the steel wool ring 42 has a through hole 421 corresponding to the airflow opening 4111. The steel wool ring 42 is welded and fixed to one side of the base 411. The steel wool ring 42 and the flange 412 are located on both sides of the base 411 along the axial direction. The exhaust gas aftertreatment carrier 2 abuts against the steel wool ring 42, and the steel wool ring 42 can provide a certain buffering force to the exhaust gas aftertreatment carrier 2 to prevent it from being damaged due to excessive impact force when moving axially. The steel wool ring 42 does not contact the housing 1 radially. In the embodiment illustrated in the present invention, both the through hole 421 and the airflow opening 4111 are circular, and the diameter of the through hole 421 is larger than the diameter of the airflow opening 4111.

[0026] In the embodiment illustrated in the present invention, the flanged portion 412 is fixed to the inner wall of the housing 1. Specifically, the flanged portion 412 is welded and fixed to the inner wall of the end wall portion 15.

[0027] The retaining piece 4112 includes a first retaining piece 4112a and a second retaining piece 4112b, and the retaining groove includes a first retaining groove 4112a1 that penetrates the first retaining piece 4112a and a second retaining groove 4112b1 that penetrates the second retaining piece 4112b.

[0028] The handle 200 includes a generally U-shaped force-applying rod 51, a first mounting base 52 located at one end of the force-applying rod 51, a second mounting base 53 located at the other end of the force-applying rod 51, a first locking assembly 54 mounted in the first mounting base 52, and a second locking assembly 55 mounted in the second mounting base 53. The first mounting base 52 and the first locking assembly 54 at least partially pass through the first retaining groove 4112a1, and the second mounting base 53 and the second locking assembly 55 at least partially pass through the second retaining groove 4112b1.

[0029] In the embodiment illustrated in the present invention, the first mounting base 52 is provided with a first mounting hole 521.

[0030] The first locking assembly 54 includes a first stop ball 541 mounted in the first mounting hole 521 and protruding from the first mounting base 52, a first spring 542 mounted in the first mounting hole 521 and abutting against the first stop ball 541, and a first screw 543 fixed to the first mounting base 52 and abutting against the first spring 542. The first spring 542 can adjust the distance by which the first stop ball 541 protrudes from the first mounting base 52 according to the degree of its compression; the first stop ball 541 passes through the first retaining groove 4112a1 to retain the back of the first retaining piece 4112a.

[0031] Similarly, the second mounting base 53 is provided with a second mounting hole 531.

[0032] The second locking assembly 55 includes a second stop ball 551 mounted in the second mounting hole 531 and protruding from the second mounting base 53, a second spring 552 mounted in the second mounting hole 531 and abutting against the second stop ball 551, and a second screw 553 fixed to the second mounting base 53 and abutting against the second spring 552. The second spring 552 can adjust the distance by which the second stop ball 551 protrudes from the second mounting base 53 according to the degree of its compression; the second stop ball 551 passes through the second retaining groove 4112b1 to retain the back of the second retaining piece 4112b.

[0033] Of course, in order to facilitate the application of force, the handle 200 may also be provided with a rubber sleeve 56 that is fitted onto the force-applying rod 51.

[0034] Compared to existing technologies, the exhaust aftertreatment device 100 and its assembly of the present invention are provided with a handle 200 detachably connected to the retaining ring 41. This arrangement has two advantages: firstly, when the exhaust aftertreatment device 100 is installed on a vehicle, the handle 200 is not included, thus avoiding any impact on airflow and saving costs; secondly, when the exhaust aftertreatment device 100 needs to be disassembled, the handle 200 is connected to the retaining ring 41 to facilitate disassembly. The handle 200 serves as a tool, avoiding the increased cost of connecting a handle 200 to each exhaust aftertreatment device 100.

[0035] The above embodiments are only used to illustrate the present invention and are not intended 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 the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements 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. An exhaust gas aftertreatment device, characterized by: The exhaust gas aftertreatment device comprises: a housing provided with a containing space; an exhaust gas aftertreatment carrier encapsulated in the housing along an axial direction of the housing; and a retaining ring fixed to the housing, the retaining ring being located at one end of the exhaust gas aftertreatment carrier along the axial direction and capable of limiting axial movement of the exhaust gas aftertreatment carrier, the retaining ring comprising a base and a flange portion, the base being provided with an airflow opening corresponding to the exhaust gas aftertreatment carrier to allow airflow passing through the exhaust gas aftertreatment carrier and a plurality of clamping pieces provided with clamping grooves penetrating through the clamping pieces, and the flange portion being fixed to an inner wall of the housing. The clamping grooves are configured to cooperate with a handle detachably connected to the retaining ring. The housing comprises a main body portion, a contraction portion connected to one end of the main body portion, a transition portion connected to the other end of the main body portion, a bulge portion connected to the transition portion, and an end wall portion connected to the bulge portion; the contraction portion is used to guide insertion of the exhaust gas aftertreatment device into a corresponding mounting housing; the exhaust gas aftertreatment carrier is encapsulated in the main body portion; the bulge portion is used to abut against the mounting housing; and the flange portion is welded and fixed to an inner wall of the end wall portion.

2. The exhaust gas aftertreatment device of claim 1, wherein: The clamping pieces are integrally stamped from the base, and the clamping pieces are perpendicular to the base.

3. The exhaust gas aftertreatment device of claim 1, wherein: The base is provided with notches located on one side of the clamping pieces and close to the clamping pieces; and the clamping grooves are rectangular.

4. The exhaust gas aftertreatment device of claim 3, wherein: The exhaust gas aftertreatment device further comprises a gasket located between the housing and the exhaust gas aftertreatment carrier along a radial direction of the housing.

5. The exhaust gas aftertreatment device of claim 2, wherein: The exhaust gas aftertreatment device further comprises a steel wool ring located between the exhaust gas aftertreatment carrier and the retaining ring along the axial direction, the steel wool ring being provided with perforations corresponding to the airflow opening, the steel wool ring being welded and fixed to one side of the base, the steel wool ring and the flange portion being located on two sides of the base along the axial direction respectively, the exhaust gas aftertreatment carrier abutting against the steel wool ring, and the steel wool ring not contacting the housing along the radial direction. The perforations and the airflow opening are circular, and a diameter of the perforations is greater than a diameter of the airflow opening.

6. The exhaust gas aftertreatment device of claim 5, wherein: The exhaust gas aftertreatment device is as claimed in any one of claims 1 to 6.

7. An exhaust gas aftertreatment device assembly, characterized by The handle is detachably connected to the retaining ring to detach the exhaust gas aftertreatment device. The clamping pieces comprise first clamping pieces and second clamping pieces, and the clamping grooves comprise first clamping grooves penetrating through the first clamping pieces and second clamping grooves penetrating through the second clamping pieces. ​ ​ 8. The exhaust gas aftertreatment device assembly of claim 7, wherein: ​ The handle comprises a force applying rod in a substantially U shape, a first mounting seat at one end of the force applying rod, a second mounting seat at the other end of the force applying rod, a first lock catch assembly mounted in the first mounting seat, and a second lock catch assembly mounted in the second mounting seat, the first mounting seat and the first lock catch assembly at least partially passing through the first clamping groove, and the second mounting seat and the second lock catch assembly at least partially passing through the second clamping groove.

9. The exhaust gas aftertreatment device assembly of claim 8, wherein: The first mounting seat is provided with a first mounting hole; The first lock catch assembly comprises a first stop ball mounted in the first mounting hole and protruding from the first mounting seat, a first spring mounted in the first mounting hole and abutting against the first stop ball, and a first screw fixed to the first mounting seat and abutting against the first spring; the first spring can adjust the distance of the first stop ball protruding from the first mounting seat; the first stop ball passes through the first clamping groove to be clamped to the back of the first clamping piece.

10. The exhaust gas aftertreatment device assembly of claim 9, wherein: The second mounting seat is provided with a second mounting hole; The second lock catch assembly comprises a second stop ball mounted in the second mounting hole and protruding from the second mounting seat, a second spring mounted in the second mounting hole and abutting against the second stop ball, and a second screw fixed to the second mounting seat and abutting against the second spring; the second spring can adjust the distance of the second stop ball protruding from the second mounting seat; the second stop ball passes through the second clamping groove to be clamped to the back of the second clamping piece.

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