Simple non-road post-treatment air outlet structure

Abstract

The utility model provides a simple non-road post-treatment air outlet structure. The simple non-road post-treatment air outlet structure comprises an integrated cylinder body, a flanged cylinder body, a flange and a connecting pipe, the integrated cylinder comprises a main cylinder, and one end of the main cylinder is integrally connected with an end cover; the middle of the end cover is integrally connected with an arc-shaped plate; round notches are formed in one end of the main cylinder and the top of the arc-shaped plate; one side, facing the main cylinder body, of the circular gap extends upwards from the main cylinder body to form a skirt edge; the top of the connecting pipe is a circular pipe section, and an arc-shaped pipe piece is connected to the lower portion of the circular pipe section. The connecting pipe is inserted into one end of the main cylinder and a circular notch in the top of the arc-shaped plate; the skirt edge is welded with the circular pipe section, and the upper edge of the arc-shaped plate is welded with one side, deviating from the skirt edge, of the connecting pipe; the arc-shaped pipe pieces abut against the inner walls of the arc-shaped plates. According to the utility model, the number of parts can be reduced, and manufacturability and assemblability are improved.

Description

A simple off-road aftertreatment exhaust structure Technical Field

[0001] This utility model relates to the field of diesel engine aftertreatment technology, and in particular to a simple off-road aftertreatment exhaust structure. Background Technology

[0002] Off-road diesel engines, like automotive diesel engines, face exhaust gas treatment issues. The aftertreatment exhaust structure is the connecting component between the engine and the exhaust aftertreatment system; aftertreatment manufacturers, while pursuing quality, also face cost control issues, which requires optimizing product structure, reducing the number of parts, and improving the manufacturability and assemblability of the product.

[0003] The existing post-treatment exhaust structure is shown in Figure 1, including a main cylinder 1, a flanged cylinder 2, a flange 3, a straight pipe 4, an end cap 5, and a reinforcing patch 6. An arc-shaped plate 501 is welded onto the end cap 5, and the end cap 5 is connected to one end of the main cylinder 1 by welding. An arc-shaped notch is provided at the top of one end of the main cylinder 1. The straight pipe 4 is inserted between the arc-shaped notch at the top of one end of the main cylinder 1 and the arc-shaped plate 501. Then, the reinforcing patch 6 is placed at the top of one end of the main cylinder 1. The upper edge of the reinforcing patch 6 and the upper edge of the arc-shaped plate 501 are welded to the straight pipe 4, the lower edge of the reinforcing patch 6 is welded to the main cylinder 1, and the sides of the reinforcing patch 6 are welded to the arc-shaped plate 501 and the end cap 5, respectively. The flange 3 is welded to the top of the straight pipe 4. The other end of the main cylinder 1 is welded to the flanged cylinder 2.

[0004] The aforementioned post-treatment exhaust structure has many parts, requiring numerous positioning fixtures and welding processes. The fit between the reinforcing patch 6 and the end cap 5, as well as the main cylinder 1, is difficult to control, inevitably leading to the need for additional welding during production. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a simplified off-road aftertreatment exhaust structure that reduces the number of parts, positioning fixtures, and welding processes, thereby improving manufacturability and assemblability. To achieve the above technical objectives, the technical solution adopted in this utility model embodiment is as follows:

[0006] This utility model embodiment provides a simple off-road aftertreatment venting structure, including an integral cylinder, a flanged cylinder, a flange, and a connecting pipe;

[0007] The integrated cylindrical body includes a main cylindrical body, one end of which is integrally connected to an end cap; an arc-shaped plate is integrally connected to the middle of the end cap; a circular notch is provided at one end of the main cylindrical body and the top of the arc-shaped plate; a skirt extends upward from the main cylindrical body from the side of the circular notch facing the main cylindrical body.

[0008] The top of the connecting pipe is a circular pipe section, and an arc-shaped pipe segment is connected below the circular pipe section; the connecting pipe is inserted into a circular notch at one end of the main cylinder and the top of the arc-shaped plate; the skirt is welded to the circular pipe section, and the upper edge of the arc-shaped plate is welded to the side of the connecting pipe opposite to the skirt; the arc-shaped pipe segment abuts against the inner wall of the arc-shaped plate.

[0009] The upper end of the circular pipe section of the connecting pipe is welded to the flange, and the other end of the main cylinder is welded to the flanged cylinder.

[0010] Furthermore, the arc-shaped plate and the arc-shaped tube segment are both less than half a circumference in the circumferential direction, while the skirt is greater than half a circumference in the circumferential direction.

[0011] Furthermore, the upper end of the arc-shaped plate is provided with a recess.

[0012] Furthermore, the arc-shaped plate and the arc-shaped tube segment are spot-welded together.

[0013] Furthermore, the length of the flanged cylinder is greater than, equal to, or less than the length of the integral cylinder.

[0014] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0015] 1) By setting up an integrated cylinder, the number of parts, positioning tooling and welding processes can be reduced; the parts are more convenient to fit together, improving manufacturability and assemblability.

[0016] 2) The end face of the one-piece cylinder can withstand a large airflow impact and is not easily deformed, which makes the after-treatment exhaust structure usable in large-displacement after-treatment systems. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the post-treatment gas outlet structure in the prior art.

[0018] Figure 2 is a schematic diagram of the post-treatment gas outlet structure in an embodiment of this utility model.

[0019] Figure 3 is a schematic diagram of the integrated cylindrical structure in an embodiment of this utility model.

[0020] Figure 4 is a schematic diagram of the connecting pipe structure in an embodiment of this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] As shown in Figures 2, 3 and 4, the present invention provides a simple off-road post-treatment venting structure, which includes an integral cylinder 100, a flanged cylinder 2, a flange 3 and a connecting pipe 7.

[0023] The integrated cylindrical body 100 includes a main cylindrical body 1, one end of which is integrally connected to an end cap 5; an arc-shaped plate 501 is integrally connected to the middle of the end cap 5; a circular notch 101 is provided at one end of the main cylindrical body 1 and at the top of the arc-shaped plate 501; a skirt 102 extends upward from the main cylindrical body 1 on the side of the circular notch 101 facing the main cylindrical body 1.

[0024] The top of the connecting pipe 7 is a circular pipe section 701, and an arc-shaped pipe segment 702 is connected below the circular pipe section 701; the connecting pipe 7 is inserted into a circular notch 101 at one end of the main cylinder 1 and the top of the arc plate 501; the skirt 102 is welded to the circular pipe section 701, and the upper edge of the arc plate 501 is welded to the side of the connecting pipe 7 away from the skirt 102; the arc-shaped pipe segment 702 abuts against the inner wall of the arc plate 501;

[0025] The upper end of the circular pipe section 701 of the connecting pipe 7 is welded to the flange 3, and the other end of the main cylinder 1 is welded to the flanged cylinder 2.

[0026] In some specific embodiments, the one-piece cylindrical body 100 is formed by stamping, resulting in good consistency. The one-piece cylindrical body 100 significantly reduces the number of parts and also reduces welding processes between the arc-shaped plate 501, end cap 5, reinforcing patch 6, and straight pipe 4, thereby reducing positioning tooling and welding processes. This improves the assembly and weldability of parts, reduces the need for repair welding, and enhances manufacturability and assemblability. The flange 3 is used to connect to the engine exhaust port, and the flanged cylindrical body 2 is used to connect to the DOC in the aftertreatment system. Due to the presence of the arc-shaped tube segment 702 and the double-layer material of the arc-shaped plate 501 on the engine-facing end face of the one-piece cylindrical body 100, it is less prone to deformation even under strong airflow impact.

[0027] More preferably, the arc-shaped plate 501 and the arc-shaped tube segment 702 are both less than half a circumference in the circumferential direction, while the skirt 102 is greater than half a circumference in the circumferential direction; thus, the connecting pipe 7 can have a larger area to weld with the skirt 102, enhancing the welding reliability.

[0028] More preferably, the upper end of the arc plate 501 is provided with a recess 502; by providing the recess 502, the connecting pipe 7 can be more easily inserted into the circular notch 101.

[0029] More preferably, the arc-shaped plate 501 and the arc-shaped tube segment 702 are spot-welded together; a small hole of 2mm to 3mm can be drilled in the arc-shaped plate 501 first, and then spot welding is performed through the small hole; so that the arc-shaped plate 501 and the arc-shaped tube segment 702 are firmly connected.

[0030] The length of the flanged cylinder 2 can be flexibly adjusted according to usage requirements. The length of the flanged cylinder 2 can be greater than, equal to, or less than the length of the integral cylinder 100.

[0031] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A simple off-road aftertreatment exhaust structure, characterized in that, The system includes an integral cylindrical body (100), a flanged cylindrical body (2), a flange (3), and a connecting pipe (7); the integral cylindrical body (100) includes a main cylindrical body (1), one end of which is integrally connected to an end cap (5); an arc-shaped plate (501) is integrally connected to the middle of the end cap (5); a circular notch (101) is provided at one end of the main cylindrical body (1) and at the top of the arc-shaped plate (501); a skirt (102) extends upward from the main cylindrical body (1) on the side facing the main cylindrical body (1); the top of the connecting pipe (7) is a circular pipe section (701), the circular... An arc-shaped pipe segment (702) is connected below the pipe segment (701); the connecting pipe (7) is inserted into a circular notch (101) at one end of the main cylinder (1) and the top of the arc plate (501); the skirt (102) is welded to the circular pipe segment (701), and the upper edge of the arc plate (501) is welded to the side of the connecting pipe (7) away from the skirt (102); the arc-shaped pipe segment (702) abuts against the inner wall of the arc plate (501); the upper end of the circular pipe segment (701) of the connecting pipe (7) is welded to the flange (3), and the other end of the main cylinder (1) is welded to the flanged cylinder (2).

2. The simplified off-road aftertreatment exhaust structure as described in claim 1, characterized in that, The arc-shaped plate (501) and the arc-shaped tube segment (702) are both less than half a circumference in the circumferential direction, while the skirt (102) is greater than half a circumference in the circumferential direction.

3. The simplified off-road aftertreatment exhaust structure as described in claim 1, characterized in that, The upper end of the arc-shaped plate (501) is provided with a recess (502).

4. The simplified off-road aftertreatment exhaust structure as described in claim 1, characterized in that, The arc-shaped plate (501) and the arc-shaped tube segment (702) are spot welded together.

5. The simplified off-road aftertreatment exhaust structure as described in claim 1, characterized in that, The length of the flanged cylinder (2) is greater than, equal to, or less than the length of the integral cylinder (100).

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