Parallel small volume engine aftertreatment

Abstract

The utility model discloses a parallel type small -size engine post processor, including the casing, the casing inner chamber is equipped with first baffle and second baffle and is divided into the first chamber, second chamber and third chamber of independent each other with casing inner chamber, wherein, between first baffle and second baffle is second chamber, carrier pipe, the carrier pipe traverses second chamber, and will first chamber and third chamber intercommunication, the both ends of carrier pipe are installed SCR carrier respectively, and the middle part is equipped with the air pipe, the other end of air pipe extends and goes out the shell, the air pipe is equipped with the air pipe, the air pipe traverses second chamber, and will first chamber and third chamber intercommunication, and the middle part is equipped with the opening and communicates second chamber, and second chamber is equipped with the air pipe. The utility model has compact structure, small, can increase SCR flow area and so on.

Description

Technical Field

[0001] This utility model relates to the field of engine after-processor technology, and in particular to a parallel small-volume engine after-processor. Background Technology

[0002] SCR (Selective Catalytic Reduction) is widely used in diesel engines as an effective means of NOx removal. Current commercial SCR aftertreatment systems mainly employ copper-based molecular sieve structures and use urea as a reducing agent, exhibiting high NOx conversion efficiency over a relatively wide temperature window.

[0003] In the prior art, SCR, DPF, DOC and other components are generally installed in series. For example, the existing patent document CN223190498U discloses a catalyst dual parallel post-treatment packaging structure, which uses two parallel channels to treat waste gas.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The main purpose of this utility model is to propose a parallel small-volume engine after-processor with a compact structure and small size that can increase the flow area of ​​SCR.

[0006] Therefore, this utility model proposes a parallel small-volume engine after-processor.

[0007] Preferably, the present invention may also have the following technical features:

[0008] A parallel, small-volume engine aftertreatment system, including

[0009] The shell has a first baffle and a second baffle that divide the shell cavity into a first chamber, a second chamber and a third chamber, which are independent of each other. The second chamber is located between the first baffle and the second baffle.

[0010] The carrier tube passes through the second chamber and connects the first chamber and the third chamber; SCR carriers are installed at both ends of the carrier tube, and an exhaust pipe is provided in the middle; the other end of the exhaust pipe extends out of the outer shell.

[0011] An air duct is provided, which runs through the second chamber and connects the first chamber and the third chamber. An opening in the middle of the air duct connects to the second chamber, and the second chamber is provided with an air inlet pipe.

[0012] Furthermore, four SCR carriers are provided, with two SCR carriers at each end of the carrier tube.

[0013] Furthermore, the inner cavity of the housing is also provided with a mixer, which is installed at the opening of the air duct.

[0014] Furthermore, the other end of the mixer is connected to the housing.

[0015] Furthermore, it also includes a urea nozzle mounted on the housing, which sprays urea toward the interior of the mixer.

[0016] Furthermore, the urea nozzle extends into the mixer, preferably spraying urea in the axial direction of the mixer.

[0017] Furthermore, it also includes a mounting bracket, which is connected to the housing by a clamp, and the after-processor is mounted on the vehicle frame via the mounting bracket.

[0018] Furthermore, the clamp includes an upper pull tab and a lower pull tab, as well as a locking mechanism connecting the upper pull tab and the lower pull tab.

[0019] Furthermore, both the upper and lower pull tabs are U-shaped structures, and both have flanges at their ends, with mounting holes on the flanges.

[0020] Furthermore, the end of the flange of the upper pull tab is also provided with a vertical piece facing the lower pull tab, forming an L-shaped structure.

[0021] The beneficial effects of this invention compared to existing technologies include: engine exhaust gas enters the second chamber through the intake pipe, is diverted to the first and third chambers through the air guide pipe, then passes through both ends of the carrier pipe to enter the middle of the carrier pipe, and finally exits from the exhaust pipe. In this embodiment, a parallel configuration structure is adopted, resulting in a compact and small-sized after-processor; simultaneously, the intake at both ends of the carrier pipe increases the flow area of ​​the SCR carrier, improving exhaust gas treatment efficiency. Attached Figure Description

[0022] Figure 1 and Figure 2 These are perspective views of this utility model from different orientations.

[0023] Figure 3 This is a partial view of the present invention.

[0024] Figure 4 This is a schematic diagram of the mixer installation of this utility model.

[0025] Figure 5 This is a schematic diagram of the SCR carrier installation of this utility model. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0027] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0028] like Figure 1-5 The parallel small-volume engine aftertreatment system shown includes a housing 1. The housing 1 has a first baffle 2 and a second baffle 6 inside, which divide the housing 1 into three independent chambers: a first chamber 13, a second chamber 12, and a third chamber 11. The second chamber 12 is located between the first baffle 2 and the second baffle 6. A carrier tube 4 has an SCR carrier 10 inside, and its two ends are connected to the first baffle 2 and the second baffle 6, respectively. In this way, the carrier tube 4 passes through the second chamber 12 and connects the first chamber 13 and the third chamber 11. In use, SCR carriers 10 are installed at both ends of the carrier tube 4. An exhaust pipe 5 is provided between the SCR carriers 10 at both ends of the carrier tube 4. One end of the exhaust pipe 5 connects to the middle of the carrier tube 4, and the other end extends through the outer casing 1 and has a flange. An air guide pipe 7 is also provided, with both ends connected to the first baffle 2 and the second baffle 6, respectively, connecting the first chamber 13 and the third chamber 11. The air guide pipe 7 has an opening 71 in the second chamber 12, connecting to the second chamber 12. The second chamber 12 has an intake pipe 9. Thus, engine exhaust gas enters the second chamber 12 from the intake pipe 9, is diverted to the first chamber 13 and the third chamber 11 via the air guide pipe 7, then passes through the SCR carriers 10 at both ends of the carrier tube 4 into the middle of the carrier tube 4, and finally exits from the exhaust pipe 5. In this embodiment, a parallel configuration is adopted, making the post-processor compact and small in size. At the same time, air is introduced from both ends of the carrier tube 4, increasing the flow area of ​​the SCR carrier 10 and improving the waste gas treatment efficiency.

[0029] Preferably, there are 2-4 SCR carriers 10, more preferably 4 SCR carriers 10, with 2 SCR carriers 10 at each end of the carrier tube 4.

[0030] The system also includes a mixer 15, which is located at the opening 71 of the air duct 7. The mixer 15 employs a conventional mixer structure; for example, it includes a frame and blades. The frame is a cylindrical tube with several circumferentially distributed and spaced windows on its outer side. Each window is fitted with a blade, and exhaust gas enters through the gaps between the blades and then through the windows into the mixer 15. Thus, after the exhaust gas enters the second chamber 12 via the air inlet pipe 9, it passes through the mixer 15 and enters the air duct 7. Preferably, one end of the mixer 15 is connected to the opening 71, and the other end is connected to the outer casing 1.

[0031] Preferably, the system further includes a urea nozzle 16, which is mounted on the housing 1 and sprays urea toward the interior of the mixer 15. Preferably, the urea nozzle 16 extends into the interior of the mixer 15, and more preferably sprays urea toward the axial direction of the mixer 15.

[0032] The system also includes a mounting bracket 3, which connects to the housing 1 via a clamp. The after-processor is mounted on the vehicle frame via the mounting bracket 3. Preferably, the clamp includes an upper pull tab 21 and a lower pull tab 17, as well as a locking mechanism connecting the upper pull tab 21 and the lower pull tab 17. Preferably, the locking mechanism includes a bolt and a nut 22. Both the upper pull tab 21 and the lower pull tab 17 are U-shaped structures, and both have flanges (20, 18) at their ends, with mounting holes for connecting the bolts. Preferably, the end of the flange 20 of the upper pull tab 21 also has a vertical piece 19 facing the lower pull tab, making the flange of the upper pull tab 21 L-shaped.

[0033] Preferably, the outer shell 1 is a square column with rounded corners along its length.

[0034] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0035] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. A parallel-type small-volume engine aftertreatment system, characterized in that: include The shell has a first baffle and a second baffle that divide the shell cavity into a first chamber, a second chamber and a third chamber, which are independent of each other. The second chamber is located between the first baffle and the second baffle. The carrier tube passes through the second chamber and connects the first chamber and the third chamber; SCR carriers are installed at both ends of the carrier tube, and an exhaust pipe is provided in the middle; the other end of the exhaust pipe extends out of the outer shell. An air duct is provided, which runs through the second chamber and connects the first chamber and the third chamber. An opening in the middle of the air duct connects to the second chamber, and the second chamber is provided with an air inlet pipe.

2. The parallel small-volume engine aftertreatment system as described in claim 1, characterized in that: There are 4 SCR carriers, and 2 SCR carriers are respectively provided at both ends of the carrier tube.

3. The parallel small-volume engine aftertreatment system as described in claim 1, characterized in that: The inner cavity of the housing is also provided with a mixer, which is installed at the opening of the air duct.

4. The parallel small-volume engine aftertreatment system as described in claim 3, characterized in that: The other end of the mixer is connected to the housing.

5. The parallel small-volume engine aftertreatment system as described in claim 3, characterized in that: It also includes a urea nozzle, which is mounted on the housing and sprays urea toward the interior of the mixer.

6. The parallel small-volume engine aftertreatment system as described in claim 5, characterized in that: The urea nozzle extends into the mixer and sprays urea in the axial direction of the mixer.

7. The parallel small-volume engine aftertreatment system as described in claim 1, characterized in that: It also includes a mounting bracket, which is connected to the housing via clamps.

8. The parallel small-volume engine aftertreatment system as described in claim 7, characterized in that: The clamp includes an upper pull tab and a lower pull tab, as well as a locking mechanism that connects the upper pull tab and the lower pull tab.

9. The parallel small-volume engine aftertreatment system as described in claim 8, characterized in that: Both the upper and lower pull tabs are U-shaped structures, and both have flanges at their ends, with mounting holes on the flanges.

10. The parallel small-volume engine aftertreatment system as described in claim 9, characterized in that: The end of the flange of the upper pull tab is also provided with a vertical piece facing the lower pull tab, forming an L-shaped structure.

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