A diesel vehicle aftertreatment exhaust device

Abstract

This utility model provides a diesel vehicle aftertreatment exhaust device, comprising: an exhaust cylinder extending axially; an exhaust straight pipe extending axially and disposed at one end of the exhaust cylinder, the diameter of the exhaust straight pipe being smaller than the diameter of the exhaust cylinder; an end cap, one end of which is fixedly connected to the end of the exhaust cylinder near the exhaust straight pipe, and the other end of which is fixedly connected to the exhaust straight pipe; and a partition plate having a through hole through which the end of the exhaust straight pipe near the exhaust cylinder is fitted, the outer side of which is fixedly connected to the inner wall of the end cap. The diesel vehicle aftertreatment exhaust device provided by this utility model has a more stable and simple structure, strong versatility, and can be matched with cylindrical aftertreatment structures of different displacements, avoiding fatigue fracture and other failure problems in diesel vehicle aftertreatment exhaust structures, thus improving the reliability of the diesel vehicle aftertreatment exhaust device.

Description

Technical Field

[0001] This utility model belongs to the field of diesel engine aftertreatment technology, and in particular relates to a diesel vehicle aftertreatment exhaust device. Background Technology

[0002] With increasingly stringent emission regulations for diesel engines, exhaust aftertreatment products have become more complex in structure and have higher quality requirements. The exhaust aftertreatment outlet of diesel vehicles is generally suspended in the air, making it susceptible to high-frequency vibration loads and resulting in low reliability. In addition, in order to match different vehicle models, additional pipes are often connected to the outlet to adjust the exhaust outlet, which can lead to fatigue fracture and other failures of the aftertreatment outlet. Summary of the Invention

[0003] To address at least one technical problem in the prior art, this utility model provides a diesel vehicle aftertreatment exhaust device with high reliability. To achieve the above technical objectives, the technical solution adopted by this utility model is as follows:

[0004] This utility model embodiment provides a diesel vehicle aftertreatment exhaust device, including:

[0005] The exhaust cylinder extends axially.

[0006] An exhaust pipe extends axially and is located at one end of the exhaust cylinder. The diameter of the exhaust pipe is smaller than the diameter of the exhaust cylinder.

[0007] An end cap, one end of which is fixedly connected to the end of the air outlet cylinder near the air outlet straight pipe, and the other end of which is fixedly connected to the air outlet straight pipe;

[0008] A partition plate is provided with a through hole, and the through hole is fitted with one end of the air outlet straight pipe near the air outlet cylinder. The outer side of the partition plate is fixedly connected to the inner wall of the end cap.

[0009] Furthermore, the diameter of the end cap gradually decreases from the end closest to the air outlet cylinder to the end furthest from the air outlet cylinder.

[0010] Furthermore, the end cap is provided with a first extension at one end near the air outlet cylinder body. The first extension extends toward the air outlet cylinder body, and the inner wall of the first extension is attached to and fixedly connected to the outer wall of the air outlet cylinder body.

[0011] And / or, the end cap is provided with a second extension at one end near the straight outlet pipe, the second extension extends toward the straight outlet pipe, and the inner wall of the second extension is attached to and fixedly connected to the outer wall of the straight outlet pipe.

[0012] Furthermore, the outer side of the partition is provided with a first flange, which extends toward the air outlet cylinder and is fitted and fixedly connected to the inner wall of the end cap.

[0013] Furthermore, the partition plate has a second flange at the through hole, the second flange extending toward the air outlet cylinder, and the second flange is fitted and fixedly connected to the outer wall of the air outlet straight pipe.

[0014] Furthermore, the partition plate is also provided with positioning holes.

[0015] Furthermore, the partition plate is provided with two positioning holes, and the line connecting the two positioning holes passes through the center of the through hole.

[0016] Furthermore, the outlet straight pipe includes:

[0017] The first section is fixedly connected to one end of the air outlet cylinder and to the partition plate, and the end of the end cap facing away from the air outlet cylinder is fixedly connected to the outer wall of the first section.

[0018] The second section is located at the end of the first section away from the air outlet cylinder and is fixedly connected to the first section. The diameter of the second section is smaller than the diameter of the first section.

[0019] Furthermore, the second segment has a notch at the end opposite to the first segment.

[0020] Furthermore, the material of the air outlet cylinder is stainless steel.

[0021] And / or, the material of the exhaust straight pipe is stainless steel;

[0022] And / or, the end cap is made of stainless steel;

[0023] And / or, the partition is made of stainless steel.

[0024] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0025] The diesel vehicle aftertreatment exhaust device provided in this embodiment of the utility model extends the diesel vehicle aftertreatment exhaust device by connecting the exhaust cylinder body to the exhaust straight pipe. By setting end caps and partitions, the structure of the diesel vehicle aftertreatment exhaust device is more stable, simple, and highly versatile. It can be matched with cylindrical aftertreatment structures of different displacements, avoids failure problems such as fatigue fracture that are prone to occur in the diesel vehicle aftertreatment exhaust structure, and improves the reliability of the diesel vehicle aftertreatment exhaust device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the diesel vehicle aftertreatment exhaust device in an embodiment of this utility model.

[0027] Figure 2 This is a schematic diagram of the end cap structure in an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the partition structure in an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the straight air outlet pipe in an embodiment of this utility model. Detailed Implementation

[0030] 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.

[0031] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] This utility model embodiment provides a diesel vehicle aftertreatment exhaust device, including:

[0035] The air outlet cylinder 1 extends axially;

[0036] A straight air outlet pipe 2 extends axially and is located at one end of the air outlet cylinder 1. The diameter of the straight air outlet pipe 2 is smaller than the diameter of the air outlet cylinder 1.

[0037] End cap 3, one end of which is fixedly connected to the end of the air outlet cylinder 1 near the air outlet straight pipe 2, and the other end of which is fixedly connected to the air outlet straight pipe 2;

[0038] The partition 4 has a through hole 4a, and the through hole 4a is fitted onto one end of the air outlet straight pipe 2 near the air outlet cylinder 1. The outer side of the partition 4 is fixedly connected to the inner wall of the end cap 3.

[0039] In a specific embodiment, such as Figure 1 As shown, both the exhaust cylinder 1 and the exhaust straight pipe 2 extend from left to right and are arranged sequentially from left to right. The left end of the exhaust cylinder 1 is connected to the diesel vehicle aftertreatment body. A catalyst carrier is encapsulated inside the exhaust cylinder 1. The right end of the exhaust cylinder 1 is fixedly connected to the left end of the exhaust straight pipe 2. The end cap 3 is located at the right end of the exhaust cylinder 1, and the left end of the end cap 3 is fixedly connected to the right end of the exhaust cylinder 1, while the right end is fixedly connected to the outer wall of the exhaust straight pipe 2. The partition 4 is fitted over the left end of the exhaust straight pipe 2, and the outer side of the partition 4 is fixedly connected to the inner wall of the end cap 3. The fixed connection can be welded. This structure is reasonable because the diameter of the exhaust straight pipe is smaller than the diameter of the exhaust cylinder, thus extending the overall length of the diesel vehicle aftertreatment exhaust device and facilitating assembly.

[0040] The shape of the end cap 3 is not limited. In one specific embodiment, the diameter of the end cap 3 gradually decreases from the end closest to the air outlet cylinder 1 to the end furthest from the air outlet cylinder 1. Figure 2 As shown, the tapered end cap 3 has a stable structure, which improves the stability of the diesel vehicle aftertreatment exhaust device and enhances its vibration resistance.

[0041] Furthermore, the end cap 3 is provided with a first extension 31 at one end near the air outlet cylinder 1. The first extension 31 extends toward the air outlet cylinder 1, and the inner wall of the first extension 31 is in contact with the outer wall of the air outlet cylinder 1.

[0042] And / or, the end cap 3 is provided with a second extension 32 at one end near the straight outlet pipe 2, the second extension 32 extends toward the straight outlet pipe 2, and the inner wall of the second extension 32 is in contact with the outer wall of the straight outlet pipe 2.

[0043] like Figure 1 and Figure 2As shown, the left end of the end cap 3 is provided with the first extension 31, which extends to the left and is welded to the outer wall of the air outlet cylinder 1. Meanwhile, the right end of the end cap 3 is provided with the second extension 32, which extends to the right and is welded to the outer wall of the air outlet straight pipe 2. This structure can improve the connection between the end cap and the air outlet cylinder, and between the end cap and the air outlet straight pipe. The structure is stable, avoids the air outlet straight pipe 2 from shifting, and improves the safety of the diesel vehicle aftertreatment air outlet device.

[0044] The structure of the partition 4 is not limited. In a specific embodiment, the outer side of the partition 4 is provided with a first flange 41, which extends toward the air outlet cylinder 1 and is attached and fixedly connected to the inner wall of the end cap 3.

[0045] Furthermore, a second flange 42 is provided at the through hole 4a of the partition plate 4. The second flange 42 extends toward the air outlet cylinder 1 and is attached to and fixedly connected to the outer wall of the air outlet straight pipe 2.

[0046] like Figure 1 and Figure 3 As shown, the outer side of the partition 4 is provided with the first flange 41, and the first flange 41 extends to the left. The outer side of the flange is welded to the inner wall of the end cap 3. Similarly, the second flange 42 at the through hole 4a also extends to the left and is welded to the outer wall of the air outlet straight pipe 2.

[0047] During installation, first, the straight exhaust pipe 2 is passed through the through hole 4a of the partition 4 and the end cap 3. The straight exhaust pipe 2, the partition 4, and the end cap 3 are welded into a component by a welding fixture. Then, the entire component is assembled with the exhaust cylinder 1 and welded to form a sealed exhaust structure. Finally, the exhaust structure is connected and fixed to the diesel vehicle aftertreatment body.

[0048] The partition 4, the end cap 3, and the exhaust pipe 2 are welded together to form a stable triangular support structure, which greatly improves the resistance of the diesel vehicle aftertreatment exhaust device to vehicle vibration load and enhances the reliability of the diesel vehicle aftertreatment exhaust device.

[0049] Furthermore, the partition 4 is also provided with positioning holes 4b, which are understood to facilitate the positioning of tooling fixtures during the manufacturing process.

[0050] The position and number of the positioning holes 4b are not limited, and the number and position of the positioning holes 4b can be adjusted adaptively according to actual needs. In a specific embodiment, the partition 4 is provided with two positioning holes 4b, and the line connecting the two positioning holes 4b passes through the center of the through hole 4a. Figure 3 As shown, the positioning hole 4b is on the extension line of the diameter of the through hole 4a. It has a simple structure and reasonable design, which is conducive to the rapid positioning of the partition 4, thereby improving the assembly efficiency of the diesel vehicle aftertreatment exhaust device.

[0051] Furthermore, the outlet straight pipe 2 includes:

[0052] The first section 21 is fixedly connected to one end of the air outlet cylinder 1 and to the partition 4. The end cap 3, which is away from the air outlet cylinder 1, is fixedly connected to the outer wall of the first section 21.

[0053] The second segment 22 is located at one end of the first segment 21 away from the air outlet cylinder 1 and is fixedly connected to the first segment 21. The diameter of the second segment 22 is smaller than the diameter of the first segment 21.

[0054] In a specific embodiment, such as Figure 1 and Figure 4 As shown, the right end of the air outlet cylinder 1 is the first section 21, and the right end of the first section 21 is the second section 22. Since the diameter of the second section 22 is smaller than the diameter of the first section 21, this structure is beneficial to further extend the length of the diesel vehicle aftertreatment air outlet device, which is convenient for assembly.

[0055] Furthermore, the second segment 22 has a notch 22a at the end opposite to the first segment 21, such as... Figure 4 As shown, the notch 22a facilitates positioning and is beneficial for the rapid assembly of the diesel vehicle aftertreatment exhaust device.

[0056] Furthermore, the partition 4 is made of stainless steel;

[0057] And / or, the end cap 3 is made of stainless steel;

[0058] And / or, the material of the exhaust straight pipe 2 is stainless steel;

[0059] And / or, the exhaust cylinder 1 is made of stainless steel. Stainless steel is corrosion resistant, and the use of stainless steel for all components can extend the service life of the diesel vehicle aftertreatment exhaust device.

[0060] 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 examples, 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 diesel vehicle aftertreatment exhaust device, characterized in that, include: The air outlet cylinder (1) extends axially; An outlet straight pipe (2) extends axially and is located at one end of the outlet cylinder (1). The diameter of the outlet straight pipe (2) is smaller than the diameter of the outlet cylinder (1). End cap (3), one end of the end cap (3) is fixedly connected to the end of the air outlet cylinder (1) near the air outlet straight pipe (2), and the other end of the end cap (3) is fixedly connected to the air outlet straight pipe (2); The partition (4) has a through hole (4a) and the through hole (4a) is fitted with one end of the air outlet straight pipe (2) near the air outlet cylinder (1). The outer side of the partition (4) is fixedly connected to the inner wall of the end cap (3).

2. The diesel vehicle aftertreatment exhaust device as described in claim 1, characterized in that, The diameter of the end cap (3) gradually decreases from the end closest to the air outlet cylinder (1) to the end furthest from the air outlet cylinder (1).

3. The diesel vehicle aftertreatment exhaust device as described in claim 1, characterized in that, The end cap (3) is provided with a first extension (31) at one end near the air outlet cylinder (1). The first extension (31) extends toward the air outlet cylinder (1), and the inner wall of the first extension (31) is attached to and fixedly connected to the outer wall of the air outlet cylinder (1). And / or, the end cap (3) is provided with a second extension (32) at one end near the outlet pipe (2), the second extension (32) extends toward the outlet pipe (2), and the inner wall of the second extension (32) is attached to and fixedly connected to the outer wall of the outlet pipe (2).

4. The diesel vehicle aftertreatment exhaust device as described in claim 1, characterized in that, The outer side of the partition (4) is provided with a first flange (41), which extends toward the air outlet cylinder (1) and is attached and fixedly connected to the inner wall of the end cap (3).

5. The diesel vehicle aftertreatment exhaust device as described in claim 1, characterized in that, The partition (4) has a second flange (42) at the through hole (4a), the second flange (42) extends toward the air outlet cylinder (1), and the second flange (42) is attached to and fixedly connected to the outer wall of the air outlet straight pipe (2).

6. The diesel vehicle aftertreatment exhaust device as described in claim 1, characterized in that, The partition (4) is also provided with positioning holes (4b).

7. The diesel vehicle aftertreatment exhaust device as described in claim 6, characterized in that, The partition (4) is provided with two positioning holes (4b), and the line connecting the two positioning holes (4b) passes through the center of the through hole (4a).

8. The diesel vehicle aftertreatment exhaust device as described in claim 1, characterized in that, The outlet straight pipe (2) includes: The first section (21) is fixedly connected to one end of the air outlet cylinder (1) and to the partition (4), and the end cap (3) is fixedly connected to the outer wall of the first section (21) at the end away from the air outlet cylinder (1). The second segment (22) is located at the end of the first segment (21) away from the air outlet cylinder (1) and is fixedly connected to the first segment (21). The diameter of the second segment (22) is smaller than the diameter of the first segment (21).

9. The diesel vehicle aftertreatment exhaust device as described in claim 8, characterized in that, The second segment (22) has a notch (22a) at the end opposite to the first segment (21).

10. The diesel vehicle aftertreatment exhaust device as described in claim 1, characterized in that, The material of the air outlet cylinder (1) is stainless steel. And / or, the material of the outlet straight pipe (2) is stainless steel; And / or, the end cap (3) is made of stainless steel; And / or, the partition (4) is made of stainless steel.

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