End cone structure and tail gas after-treatment packaging
By designing inner and outer end cone structures and high-temperature insulation cotton, the problem of poor welding quality in the exhaust gas aftertreatment device was solved, achieving efficient catalyst conversion and high-temperature insulation, and reducing device losses and costs.
Patent Information
- Application Number
- CN202423079835.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing exhaust gas aftertreatment devices suffer from poor welding quality, resulting in severe wear and tear over long-term use and high costs. The question is how to improve the working efficiency of exhaust gas aftertreatment devices and reduce wear and tear without sacrificing economic efficiency.
The design incorporates an inner and outer cone structure and high-temperature insulation cotton. High-temperature insulation cotton is installed between the inner and outer cones. The second end of the inner cone extends beyond the fourth end of the outer cone for welding and fixing to the cylinder. Combined with a double-layer cotton-filled structure, the insulation effect and welding quality are improved.
It improves the conversion efficiency of the catalyst, reduces the content of precious metals, enhances high temperature resistance and heat insulation performance, avoids leakage and loss in the exhaust gas after-treatment packaging, and improves welding quality.
Smart Images
Figure CN223482748U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of engine exhaust aftertreatment technology, specifically to an end cone structure and exhaust aftertreatment packaging. Background Technology
[0002] The exhaust aftertreatment device is the most critical external purification component in the automotive exhaust system. It can efficiently convert carbon monoxide (CO), nitrogen oxides (NOx), and hydrocarbons in the exhaust gas into harmless carbon dioxide, water vapor, and nitrogen through oxidation-reduction reactions.
[0003] With the continuous growth in the number of vehicles and increasingly stringent environmental regulations, reducing exhaust emissions has become a major challenge for the automotive industry. Against this backdrop, further optimizing the efficiency of exhaust aftertreatment devices has become particularly crucial. While improving purification effects can be achieved through techniques such as refining catalyst coating technology or increasing the proportion of precious metals, these methods often involve long development cycles and high costs. Furthermore, poor welding quality in exhaust aftertreatment devices leads to wear and tear under prolonged erosion. Therefore, seeking to enhance the efficiency of exhaust aftertreatment devices and reduce their wear and tear without sacrificing economic efficiency has become a research hotspot in this field. Utility Model Content
[0004] This application provides an end-cone structure and exhaust gas aftertreatment packaging to enhance the working efficiency of the exhaust gas aftertreatment device and reduce the wear and tear of the exhaust gas treatment device.
[0005] In some embodiments, an end-cone structure is provided, including an inner end-cone, an outer end-cone, and high-temperature insulation cotton disposed between the inner end-cone and the outer end-cone; the end-cone structure has a first opening and a second opening, wherein the inner end-cone has a first end near the first opening and a second end near the second opening, the outer end-cone has a third end near the first opening and a fourth end near the second opening, the first end and the third end are fitted together, the second end and the fourth end are fitted together, and the second end extends beyond the fourth end.
[0006] In some embodiments, the inner end cone, outer end cone, and high-temperature insulation cotton of the end cone structure are conical arc surfaces that fit together.
[0007] In some embodiments, the outer end cone surface is provided with a heat-insulating coating.
[0008] In some embodiments, the inner end cone has a diameter of 40-70 mm at the first end, a diameter of 100-150 mm at the second end, and a height of 120-180 mm.
[0009] In some embodiments, the high-temperature insulation cotton is made of ceramic fiber material, and the thickness of the high-temperature insulation cotton is 5~10mm.
[0010] In some embodiments, the thickness of the outer end cone is 1~1.5mm, and the outer end cone is made of stainless steel, nickel-based alloy, or aluminum alloy.
[0011] In some embodiments, the thickness of the inner end cone is 0.5~1mm, and the inner end cone is made of stainless steel.
[0012] In some embodiments, an exhaust gas aftertreatment package is provided, including an intake flange, an intake end cone, a purification component, and an exhaust end cone connected in sequence. The purification component includes a cylinder, an aftertreatment carrier, and a gasket located radially between the cylinder and the aftertreatment carrier. Both the intake end cone and the exhaust end cone include the end cone structure described above.
[0013] In some embodiments, the end of the air inlet flange connected to the air inlet cone is provided with a groove, the inner and outer cones of the air inlet cone are embedded in the groove, and the two ends of the cylinder are respectively embedded in the second openings of the air inlet cone and the air outlet cone.
[0014] In some embodiments, the outlet cone is connected to an outlet pipe, the outlet pipe is embedded in a first opening of the outlet cone, and the first end of the outlet cone extends beyond the third end of the outlet cone.
[0015] The end-cone structure provided in this application improves insulation, reduces heat loss, enhances catalyst conversion efficiency, reduces precious metal content, and improves high-temperature resistance, corrosion resistance, and thermal insulation performance through a double-layer cotton-filled structure. By setting the second end to extend beyond the fourth end, when the cylinder and end-cone structure are connected in the exhaust gas aftertreatment encapsulation, the second end can be directly embedded in the inner end cone and welded to it. The portion of the second end extending beyond the fourth end can be welded to the cylinder. The welding position between the second end and the cylinder is not obstructed by the outer end cone, simplifying the operation and effectively ensuring the welding quality between the end-cone structure and the cylinder. This reduces losses caused by exhaust gas or catalyst erosion and prevents leakage in the exhaust gas aftertreatment encapsulation. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1These are schematic diagrams of the end-cone structure in some embodiments of this application;
[0018] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;
[0019] Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle;
[0020] Figure 4 This is a schematic diagram of the structure of the exhaust gas aftertreatment package in some embodiments of this application;
[0021] Figure 5 yes Figure 4 A partial cross-sectional view of the exhaust gas aftertreatment package in the embodiment.
[0022] In the above attached figures:
[0023] 10. End cone structure; 11. Inner end cone; 111. First end; 112. Second end; 12. Outer end cone; 121. Third end; 122. Fourth end; 13. High-temperature insulation cotton; 14. First opening; 15. Second opening;
[0024] 20. Inlet cone; 30. Outlet cone;
[0025] 40. Inlet flange; 41. Groove;
[0026] 50. Purification component; 51. Cylinder; 52. Post-treatment carrier; 53. Gasket;
[0027] 61. Exhaust pipe; 62. First support; 63. Second support; 64. Oxygen sensor. Detailed Implementation
[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.
[0029] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.
[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0031] Please see Figures 1 to 3 , Figure 1 These are schematic diagrams of the end-cone structure in some embodiments of this application. Figure 2 yes Figure 1 A magnified view of a portion of point A in the diagram. Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle.
[0032] This application provides an end-cone structure 10, including an inner end-cone 11, an outer end-cone 12, and a high-temperature insulation cotton 13 disposed between the inner end-cone 11 and the outer end-cone 12. The end-cone structure 10 is provided with a first opening 14 and a second opening 15. The inner end-cone 11 is provided with a first end 111 near the first opening 14 and a second end 112 near the second opening 15. The outer end-cone 12 is provided with a third end 121 near the first opening 14 and a fourth end 122 near the second opening 15. The first end 111 and the third end 121 are attached together, and the second end 112 and the fourth end 122 are attached together, with the second end 112 extending beyond the fourth end 122.
[0033] In the end-cone structure 10 provided in this embodiment, the inner end cone 11 and the outer end cone 12 are fitted together at the first opening 14 and the second opening 15, which can effectively fix the high-temperature insulation cotton 13 between the inner end cone 11 and the outer end cone 12 and prevent the high-temperature insulation cotton 13 from overflowing from between the inner end cone 11 and the outer end cone 12. Furthermore, since the second end 112 extends beyond the fourth end 122, that is, the inner end cone 11 protrudes from the outer end cone 12 at the second opening 15, it is convenient to weld and fix the inner end cone 11 and the outer end cone 12.
[0034] When the end cone structure 10 is applied in the exhaust gas aftertreatment encapsulation, the second opening 15 of the end cone structure 10 needs to be sealed and fitted to the end of the cylinder 51 of the exhaust gas aftertreatment encapsulation. In related technologies, the fourth end 122 of the end cone structure 10 extends beyond the second end 112. When the end cone structure 10 is connected to the cylinder 51, the cylinder 51 will be embedded in the outer end cone 12 and opposite to the inner end cone 11, making it impossible to weld and fix it to the inner end cone 11. Instead, it is only fixedly connected to the outer end cone 12, which results in poor connection strength between the cylinder 51 and the end cone structure 10 and the gas is prone to forming eddies at the connection position. Alternatively, the cylinder 51 may be embedded in the inner end cone 11, thus forming a slit between it and the outer end cone 12 that extends beyond the inner end cone 11. The welding position between the inner end cone 11 and the cylinder 51 is easily blocked, and the small operating space makes it difficult to weld and fix the cylinder 51 and the end cone structure 10. In this embodiment, the second end 112 is configured to extend beyond the fourth end 122. When the cylinder 51 and the end cone structure 10 are connected, they are directly embedded in the inner end cone 11 and welded and fixed to the inner end cone 11. The part of the second end 112 that extends beyond the fourth end 122 can be welded and fixed to the cylinder 51. The welding position of the second end 112 and the cylinder 51 will not be blocked by the outer end cone 12. The operation is simple and can effectively ensure the welding quality of the end cone structure 10 and the cylinder 51, avoid the formation of eddies in the gas at the connection position, reduce the loss caused by tail gas or catalyst erosion, and avoid tail gas after-treatment packaging leakage.
[0035] Please see Figure 1 In some embodiments, the inner end cone 11, the outer end cone 12, and the high-temperature insulation cotton 13 of the end cone structure 10 are conical arc surfaces that fit together. By designing the end cone structure 10 as a conical arc surface, the airflow transitions smoothly, reducing airflow resistance and eddy current generation, and improving catalytic conversion efficiency.
[0036] In some embodiments, the inner end cone 11 has a diameter of 40-70 mm at the first end 111, specifically 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, or 70 mm.
[0037] The inner end cone 11 has a diameter of 100~150mm at the second end 112, specifically 100mm, 110mm, 120mm, 130mm, 140mm, or 150mm.
[0038] The height of the inner end cone 11 is 120~180mm, specifically 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, or 180mm.
[0039] The thickness of the inner end cone 11 is 0.5~1mm, specifically 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1mm.
[0040] In one specific embodiment, the inner end cone 11 has a diameter of 55 mm at the first end 111, a diameter of 120 mm at the second end 112, a height of 150 mm, and is made of stainless steel, which can work stably for a long time at a high temperature of 800°C.
[0041] In some embodiments, the high-temperature insulation cotton 13 is made of ceramic fiber material, and the thickness of the high-temperature insulation cotton 13 is 5~10mm, specifically 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. In this embodiment, the high-temperature insulation cotton 13 with a thickness of 8mm is made of ceramic fiber material. This high-temperature insulation cotton 13 can effectively isolate the high temperature of the inner end cone 11 and provide good heat preservation and insulation effects.
[0042] In some embodiments, the thickness of the outer end cone 12 is 1~1.5mm, specifically 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, or 1.5mm. In this embodiment, the thickness of the outer end cone 12 is 1.2mm, enclosing the entire end cone structure 10. The outer end cone 12 is made of stainless steel, nickel-based alloy, or aluminum alloy to ensure the stability and durability of the structure.
[0043] In some embodiments, the surface of the outer end cone 12 is provided with a heat-insulating coating. The heat-insulating coating may be a high-temperature resistant heat-insulating coating such as zinc plating or chrome plating, to increase durability and further enhance the heat insulation effect.
[0044] Please see Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the exhaust aftertreatment package structure in some embodiments of this application. Figure 5 yes Figure 4 A partial cross-sectional view of the exhaust gas aftertreatment package in the embodiment.
[0045] In some embodiments, this application also provides an exhaust gas aftertreatment package, including an intake flange 40, an intake end cone 20, a purification component 50, and an exhaust end cone 30 connected in sequence. The purification component 50 includes a cylinder 51, an aftertreatment carrier 52, and a gasket 53 located radially between the cylinder 51 and the aftertreatment carrier 52. The intake end cone 20 and the exhaust end cone 30 both include the aforementioned end cone structure 10.
[0046] Please refer to Figure 2 and Figure 3 The inlet flange 40 is provided with a groove 41 at one end connected to the inlet cone 20. The inner cone 11 and outer cone 12 of the inlet cone 20 are embedded in the groove 41. The two ends of the cylinder 51 are respectively embedded in the second opening 15 of the inlet cone 20 and the outlet cone 30 and are welded and fixed to the inlet flange 40.
[0047] In order to form a complete airflow channel, the outlet cone 30 is connected to an outlet pipe 61, which is embedded in the first opening 14 of the outlet cone 30, and the first end 111 of the outlet cone 30 extends beyond the third end 121 of the outlet cone 30.
[0048] For ease of explanation, the inner end cone 11 and the outer end cone 12 of the middle end cone structure 10 of the intake end cone 20 will be referred to as the inner intake end cone and the outer intake end cone, respectively. High-temperature heat insulation cotton 13 is provided between the inner intake end cone and the outer intake end cone. The intake end cone 20 is provided with a first intake opening and a second intake opening. The inner intake end cone is provided with a first intake end near the first intake opening and a second intake end near the second intake opening. The outer intake end cone is provided with a third intake end near the first intake opening and a fourth intake end near the second intake opening. The first intake end and the third intake end are attached together, and the second intake end and the fourth intake end are attached together and the second intake end extends beyond the fourth intake end.
[0049] The inner cone 11 and outer cone 12 of the middle cone structure 10 of the vent cone 30 are referred to as the inner vent cone and the outer vent cone, respectively. High-temperature insulation cotton 13 is provided between the inner vent cone and the outer vent cone. The vent cone 30 is provided with a first vent opening and a second vent opening. The inner vent cone is provided with a first vent end near the first vent opening and a second vent end near the second vent opening. The outer vent cone is provided with a third vent end near the first vent opening and a fourth vent end near the second vent opening. The first vent end and the third vent end are attached together, and the second vent end and the fourth vent end are attached together, with the second vent end extending beyond the fourth vent end.
[0050] In this embodiment, during assembly, the inner and outer intake cones of the intake flange 40 and the intake cone 20 are subjected to double-layer spot welding. The first intake end of the inner intake cone and the third intake end of the outer intake cone are flush and embedded in the groove 41 of the intake flange 40 before welding.
[0051] One end of the cylinder 51 is embedded in the second air inlet opening of the air inlet cone 20, and the other end is embedded in the second air outlet opening of the air outlet cone 30. The second air inlet end of the inner air inlet cone extends beyond the fourth air inlet end of the outer air inlet cone and the two are welded together. The second air outlet end of the inner air outlet cone extends beyond the fourth air outlet end of the outer air outlet cone and the two are welded together.
[0052] The vent pipe 61 is embedded in the inner vent cone of the vent cone 30, wherein the first vent end of the inner vent cone 30 extends beyond the third vent end of the outer vent cone and the two are welded together. The first vent end of the inner vent cone and the third vent end of the outer vent cone also need to be pre-spot welded to ensure reliable welding and prevent leakage of the high-temperature insulation cotton 13.
[0053] To ensure assembly tolerances, the length of the high-temperature insulation cotton 13 is less than that of the inner air intake cone and the outer air intake cone. The opposite sides of the high-temperature insulation cotton 13 are covered by the inner air intake cone and the outer air intake cone, respectively. At the non-connection point between the inner air intake cone and the outer air intake cone, the high-temperature insulation cotton should be evenly attached to the side of the outer air intake cone facing the inner air intake cone.
[0054] Similarly, the length of the high-temperature insulation cotton 13 is shorter than that of the inner and outer exhaust cones. The opposite sides of the high-temperature insulation cotton 13 are covered by the inner and outer exhaust cones, respectively. At the non-connection points between the inner and outer exhaust cones, the high-temperature insulation cotton 13 must be evenly attached to the side of the outer exhaust cone facing the inner exhaust cone. This arrangement effectively prevents the high-temperature insulation cotton 13 from overflowing and eroding, improving the reliability of the exhaust gas aftertreatment packaging.
[0055] In some embodiments, the exhaust aftertreatment package further includes an oxygen sensor bracket disposed on the sidewall of the intake cone 20. The oxygen sensor bracket is used to fix the oxygen sensor 64, enabling the electronic control system to achieve closed-loop control of the air-fuel ratio through the signal from the oxygen sensor 64.
[0056] In this embodiment, the intake flange 40 is fixedly connected to the engine exhaust manifold or turbocharger outlet. The exhaust gas from the engine combustion passes through the intake cone 20 and oxygen sensor 64 to the aftertreatment carrier 52 for exhaust pollutant purification, and then passes through the exhaust cone 30 and exhaust pipe 61 to the exhaust muffler for noise reduction.
[0057] In order to fix the exhaust aftertreatment package, the exhaust aftertreatment package in this embodiment is also provided with a first bracket 62 and a second bracket 63. The exhaust aftertreatment package is bolted to the cylinder head of the engine through the first bracket 62 and the second bracket 63 to increase the modality of the entire device, reduce resonance, and improve NVH performance.
[0058] This embodiment improves the insulation effect, reduces heat loss, enhances catalyst conversion efficiency, and reduces precious metal content through a double-layer cotton-padded structure of the inlet cone 20 and outlet cone 30. It also improves high-temperature resistance, corrosion resistance, and heat insulation performance. The gasket 53 is made of high-temperature resistant material with strong heat insulation performance, eliminating the need for an external heat insulation cover on the cylinder 51 and saving space.
[0059] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.
Claims
1. A tapered end structure, characterized in that, It includes an inner cone, an outer cone, and high-temperature insulation cotton disposed between the inner cone and the outer cone; the cone structure has a first opening and a second opening, wherein the inner cone has a first end near the first opening and a second end near the second opening, the outer cone has a third end near the first opening and a fourth end near the second opening, the first end and the third end are attached together, the second end and the fourth end are attached together and the second end extends beyond the fourth end.
2. The end-conical structure according to claim 1, characterized in that, The inner and outer cones of the end cone structure, as well as the high-temperature insulation cotton, form a tapered arc surface that fits together.
3. The end-conical structure according to claim 1, characterized in that, The outer end cone surface is provided with a heat-insulating coating.
4. The end-tapered structure according to any one of claims 1 to 3, characterized in that, The inner end cone has a diameter of 40-70 mm at the first end, a diameter of 100-150 mm at the second end, and a height of 120-180 mm.
5. The end-conical structure according to claim 4, characterized in that, The high-temperature insulation cotton is made of ceramic fiber material and has a thickness of 5~10mm.
6. The end-tapered structure according to claim 4, characterized in that, The outer end cone has a thickness of 1~1.5mm and is made of stainless steel, nickel-based alloy, or aluminum alloy.
7. The end-tapered structure according to claim 6, characterized in that, The thickness of the inner end cone is 0.5~1mm, and the inner end cone is made of stainless steel.
8. A tail gas aftertreatment package, characterized in that, The device includes an inlet flange, an inlet end cone, a purification assembly, and an outlet end cone connected in sequence. The purification assembly includes a cylinder, a post-treatment carrier, and a gasket located radially between the cylinder and the post-treatment carrier. Both the inlet end cone and the outlet end cone include the end cone structure as described in any one of claims 1 to 7.
9. The exhaust gas aftertreatment packaging according to claim 8, characterized in that, The inlet flange is provided with a groove at one end connected to the inlet cone. The inner and outer cones of the inlet cone are embedded in the groove. The two ends of the cylinder are respectively embedded in the second openings of the inlet cone and the outlet cone.
10. The exhaust gas aftertreatment packaging according to claim 8, characterized in that, The air outlet cone is connected to an air outlet pipe, which is embedded in the first opening of the air outlet cone, and the first end of the air outlet cone extends beyond the third end of the air outlet cone.