Puncture assembly and vehicle exhaust pipe

Abstract

The present invention relates to a puncture assembly and a vehicle exhaust duct. The puncture assembly of the present invention comprises a first outer frame bracket, a second outer frame bracket and a puncture mesh plate. The second outer frame bracket is located at the periphery of the puncture mesh plate and partially overlaps with it. The overlapping portion forms a full weld section. The periphery of the second outer frame bracket is provided with a first outer frame bracket. The puncture mesh plate is evenly provided with micropores. The micropores are curved holes provided along the thickness direction of the puncture mesh plate. The depth of the micropores is greater than the thickness of the puncture mesh plate. The puncture assembly of the present invention is suitable for vehicles with compact chassis boundaries. By adjusting the parameters of the puncture assembly, such as the micropore aperture, porosity, and plate thickness, it is possible to flexibly solve the noise of various exhaust ducts of different types in different vehicle models, meet the requirements of exhaust resistance to high temperature, vibration, high-speed airflow impact, and dust blockage, and solve the exhaust detection problem caused by large secondary leakage.

Description

Technical Field

[0001] The present invention belongs to the technical field of exhaust muffler, and in particular relates to a puncture assembly and a vehicle exhaust pipe. Background Art

[0002] To meet high-performance exhaust muffler requirements, current China VI vehicles require a larger chassis layout to accommodate larger muffler volumes to meet noise development targets. Conventional approaches reduce exhaust noise by increasing the muffler volume. Given the tight chassis boundaries and limited muffler volume, designing a simple, space-saving puncture assembly to reduce noise from various exhaust pipes is a pressing challenge.

[0003] The current existing microporous silencer technology requires perforating micropores with an aperture of less than or equal to 1.0 mm on a thin plate with a thickness of less than 1.0 mm. Due to the very small thickness of the thin plate and the small aperture of the micropores, on the one hand, a larger opening cut in the exhaust pipe wall is covered with a thin sheet of micro-perforated material, which may cause failure and fracture under the impact of high exhaust temperature, vibration, and high flow. On the other hand, the same microporous silencer structure cannot flexibly solve various types of exhaust pipe noise existing in different models. In addition, the exhaust pipe is arranged in a special use environment with dust. The existing microporous structure will have a dust blockage failure mode. The blockage may accumulate behind the microporous component, resulting in the failure of the exhaust noise reduction performance of the microporous component due to blockage. Considering the problem of exhaust tail emission detection, if the small hole is designed to have a large leakage, there is a risk of inaccurate exhaust inspection and evaluation. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art by providing a puncture assembly and a vehicle exhaust pipe. The puncture assembly of the present invention is suitable for vehicles with compact chassis boundaries. By adjusting parameters such as the puncture assembly's micropore diameter, porosity, and plate thickness, it can flexibly address noise in various exhaust pipes of different vehicle models. It also meets the requirements for exhaust resistance to high temperatures, vibration, high-speed airflow impact, and dust clogging, and solves the problem of exhaust detection caused by large secondary leaks.

[0005] To achieve the above technical objectives, the technical solution adopted in the embodiment of the present invention is:

[0006] In the first aspect, an embodiment of the present invention provides a puncture assembly, comprising a first outer frame bracket, a second outer frame bracket and a puncture mesh plate, wherein the second outer frame bracket is located at the periphery of the puncture mesh plate and partially overlaps with it, and the overlapping portion forms a full weld section, and the first outer frame bracket is provided at the periphery of the second outer frame bracket, and micropores are evenly provided on the puncture mesh plate, and the micropores are curved holes arranged along the thickness direction of the puncture mesh plate, and the depth of the micropores is greater than the thickness of the puncture mesh plate.

[0007] Furthermore, the first outer frame bracket and the second outer frame bracket are integrally formed, and there is a height difference between the planes where the first outer frame bracket and the second outer frame bracket are located.

[0008] Furthermore, the thickness of the punctured mesh plate is less than 1 mm.

[0009] Furthermore, the puncture mesh plate is provided with at least two adjacent rows of micropores, and the number of micropores in each row is greater than 2.

[0010] Furthermore, the size of the micropores is adjusted by adjusting the micropore width and the micropore length, and the pore diameter of the micropores is less than 1 mm.

[0011] Furthermore, the porosity of the micropores on the punctured mesh plate is adjusted by adjusting the longitudinal spacing, transverse spacing of the micropores in the same column and the longitudinal spacing between two adjacent columns of micropores, and the porosity of the micropores is less than 50%.

[0012] Furthermore, the longitudinal spacing between the micropores in the same column is not equal to the longitudinal spacing between the micropores in two adjacent columns, and the micropores on the pierced mesh plate are regularly staggered.

[0013] In a second aspect, an embodiment of the present invention provides a vehicle exhaust duct, comprising an exhaust pipe, wherein at least one opening is provided on the surface of the exhaust pipe, the opening is covered with the above-mentioned puncture assembly, the outer boundary of the first outer frame bracket is welded to the exhaust pipe, and is positioned through a positioning hole provided on the first outer frame bracket.

[0014] Furthermore, the positioning holes include a first positioning hole and a second positioning hole, and the first positioning hole and the second positioning hole are arranged along the axial direction of the exhaust pipe and are respectively arranged on both sides of the first outer frame bracket.

[0015] Furthermore, the opening on the exhaust pipe has the same shape and specifications as the punctured mesh plate.

[0016] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0017] (1) The puncture assembly provided by the present invention can be used in vehicle exhaust pipes to meet the requirements of exhaust noise reduction such as high temperature resistance, vibration resistance, high-speed airflow impact resistance and dust clogging resistance. It not only minimizes the leakage of exhaust gas through the mesh plate, but also can be flexibly used in various types of vehicles by adjusting the aperture, porosity and micropore depth of the puncture mesh plate, thereby suppressing the related noise generated in the exhaust pipe to the greatest extent.

[0018] (2) The puncture assembly provided by the present invention can be applied to models with compact chassis boundaries and models with limited muffler layout, and can flexibly and effectively suppress the exhaust pipe noise of various models. It solves the problem that the existing thin plate with a thickness of less than 1.0 mm is covered with micropores with a hole diameter of less than or equal to 1.0 mm on the exhaust pipe wall, which will cause failure and fracture under the impact of high exhaust temperature, vibration, and high flow rate; it solves the failure mode of the microporous structure being prone to dust blockage in special use environments with moisture and dust.

[0019] (3) The puncture assembly of the present invention does not need to introduce any additional mass or occupy additional space in the layout of the exhaust pipe, meets the compact exhaust boundary requirements, realizes the simplified design of the exhaust structure, and utilizes the puncture microporous structure to minimize the leakage of exhaust gas through the opening, which can meet the emission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a vehicle exhaust pipe in an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 A three-dimensional view of the puncture assembly inside the exhaust pipe.

[0022] Figure 3 2 is a top view of the reverse side of the puncture assembly in an embodiment of the present invention.

[0023] Figure 4 yes Figure 3 A top view of the front of the puncture mesh plate in the puncture assembly.

[0024] Figure 5 yes Figure 4 Side cross-sectional view of the punctured mesh plate.

[0025] Figure 6 It is a schematic diagram of the flow direction of dust or airflow in the punctured mesh plate.

[0026] Explanation of the accompanying figures: 1-first outer frame bracket; 2-second outer frame bracket; 3-punctured mesh plate; 31-micropore; 4-first positioning hole; 5-second positioning hole; 6-exhaust pipe; 7-full weld section; 8-micropore width; 9-longitudinal spacing between micropores in the same column; 10-micropore length; 11-lateral spacing between micropores in the same column; 12-longitudinal spacing between two adjacent columns of micropores; 13-micropore depth. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention 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 the present invention and are not intended to limit the present invention.

[0029] Example 1

[0030] like Figure 3-5 As shown, a puncture assembly includes a first outer frame bracket 1, a second outer frame bracket 2 and a puncture mesh plate 3. The second outer frame bracket 2 is located at the periphery of the puncture mesh plate 3 and partially overlaps with it. The overlapping part forms a full weld section 7. The first outer frame bracket 1 is provided on the periphery of the second outer frame bracket 2. Micropores 31 are evenly provided on the puncture mesh plate 3. The micropores 31 are through holes with a curved direction arranged along the thickness direction of the puncture mesh plate 3. The depth of the micropores 31 is greater than the thickness of the puncture mesh plate 3.

[0031] The fully welded section 7 where the mesh plate 3 and the second outer frame bracket 2 are connected is pierced to increase the thickness of the first outer frame bracket 1 and the second outer frame bracket 2, thereby ensuring the durable strength of the pierced mesh plate 3 and avoiding airflow leakage.

[0032] The depth 13 of the curved micropores set on the punctured mesh plate 3 is greater than the thickness of the original unpunctured thin plate, thereby improving the strength of the punctured mesh plate 3, meeting the durability requirements under high exhaust temperature, vibration, and high flow impact, and avoiding airflow leakage.

[0033] It should be noted that the micropore depth 13 refers to the length of the micropore 31 along the bending direction when piercing the thickness of the mesh plate 3 .

[0034] Specifically, the first outer frame bracket 1 and the second outer frame bracket 2 are integrally formed, and there is a height difference between the planes where the first outer frame bracket 1 and the second outer frame bracket 2 are located.

[0035] The thickness of the pierced mesh plate 3 is less than 1 mm.

[0036] At least two adjacent rows of micropores 31 are provided on the puncture mesh plate 3 , and the number of micropores in each row is greater than two.

[0037] The size of the micropore 31 is adjusted by the micropore width 8 and the micropore length 10 to ensure that the pore diameter of the micropore 31 is less than 1 mm. The pore diameter is explained as follows: the pore diameter of a circular hole refers to the diameter of the hole, and the pore diameter of an irregular hole refers to the length of the widest part of the hole.

[0038] The porosity of the micropores 31 on the pierced mesh plate 3 is adjusted by the longitudinal spacing 9 and the transverse spacing 11 of the micropores in the same column and the longitudinal spacing 12 between two adjacent columns of micropores to ensure that the porosity of the micropores 31 is less than 50%.

[0039] The longitudinal spacing 9 between micropores in the same row is not equal to the longitudinal spacing 12 between two adjacent rows of micropores, and the micropores 31 on the pierced mesh plate 3 are regularly staggered.

[0040] Adjusting the micropore depth 13, the pore size and the porosity of the micropores 31 on the punctured mesh plate 3 can, on the one hand, effectively suppress the exhaust pipe noise of various types of vehicle models. On the other hand, the design of the micropores ensures that the overall exhaust gas leakage is small, thereby minimizing the leakage of exhaust gas through the openings and meeting the emission detection requirements.

[0041] Figure 6 The schematic diagram of the direction of dust or airflow through the punctured micropores of the punctured mesh plate is shown. The exhaust airflow can drive the dust to be discharged through the regularly staggered micropores on the surface of the punctured mesh plate and the regularly arranged curved punctured micropores in the cross section, effectively avoiding dust clogging the micropores.

[0042] Example 2

[0043] A vehicle exhaust pipe includes an exhaust pipe 6, the surface of the exhaust pipe 6 is provided with at least one opening, the opening is covered with the puncture assembly of embodiment 1, the outer edge of the first outer frame bracket 1 of the puncture assembly is welded to the exhaust pipe 6 and is positioned through the positioning hole provided on the first outer frame bracket 1. In this embodiment, the surface of the exhaust pipe 6 is provided with an opening, such as Figure 1-2 shown.

[0044] Specifically, the positioning holes include a first positioning hole 4 and a second positioning hole 5. The first positioning hole 4 and the second positioning hole 5 are arranged along the axial direction of the exhaust pipe 6 and are respectively arranged on both sides of the first outer frame bracket 1. The arrangement of the first positioning hole 4 and the second positioning hole 5 can ensure that the entire puncture assembly is accurately installed on the exhaust pipe 6.

[0045] The opening on the exhaust pipe 6 has the same shape and specifications as the punctured mesh plate 3 .

[0046] The present invention provides a complete set of application design strategies and application solutions to address the problem of exhaust detection caused by existing exhaust micropore puncture management methods, which cannot flexibly solve various requirements of exhaust pipe noise, exhaust high temperature resistance, vibration resistance, high-speed airflow impact resistance and dust blockage, and secondary leakage is large.

[0047] The present invention does not require the introduction of any additional mass or the occupation of additional space, and can suppress the related noise generated in the exhaust pipe. The microporous structure patch design arranged on the exhaust pipe can effectively solve various types of exhaust pipe noise. A series of punctured micropores can meet the durability requirements of the exhaust and avoid dust clogging problems, thereby minimizing the leakage of exhaust gas through the opening.

[0048] The basic scheme of the present invention includes three parts: First, based on the principle of microporous pipeline silencer, the thickness of the punctured mesh plate, the porosity and aperture size of the micropores are flexibly adjusted to effectively suppress the exhaust pipe noise of various types of vehicles, while minimizing the leakage of exhaust gas through the opening to meet emission requirements; second, through the staggered micropore design and curved micropore arrangement on the surface of the punctured mesh plate, the dust in the exhaust gas can be removed through the punctured micropores under the impact of airflow to avoid dust clogging the micropores; third, the design of the puncture component can increase the strength of the outer frame bracket on the one hand, and on the other hand, the design of the punctured micropores will make the depth of the curved micropores set on the punctured mesh plate greater than the thickness of the original unpunctured thin plate, thereby improving the strength of the mesh plate and meeting the durability requirements under high temperature, vibration and high flow impact of the exhaust gas.

[0049] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A vehicle exhaust pipe, characterized in that: It comprises an exhaust pipe (6), wherein the surface of the exhaust pipe (6) is provided with at least one opening, and the opening is covered with a puncture assembly; The puncture assembly comprises a first outer frame bracket (1), a second outer frame bracket (2) and a puncture mesh plate (3); the second outer frame bracket (2) is located on the periphery of the puncture mesh plate (3) and partially overlaps with it, and the overlapping portion forms a full weld section (7); the first outer frame bracket (1) is provided on the periphery of the second outer frame bracket (2); the outer boundary of the first outer frame bracket (1) is welded to the exhaust pipe (6) and positioned through positioning holes provided on the first outer frame bracket (1); The thickness of the puncture mesh plate (3) is less than 1 mm, and micropores (31) are evenly arranged on the puncture mesh plate (3). At least two adjacent rows of micropores (31) are arranged on the puncture mesh plate (3), and the number of micropores in each row is greater than 2. The longitudinal spacing (9) between micropores in the same row is not equal to the longitudinal spacing (12) between two adjacent rows of micropores. The micropores (31) on the puncture mesh plate (3) are regularly staggered. The micropores (31) are curved holes arranged along the thickness direction of the puncture mesh plate (3), the depth (13) of the micropores (31) is greater than the thickness of the puncture mesh plate (3), and the pore diameter of the micropores (31) is less than 1 mm.

2. The vehicle exhaust pipe according to claim 1, characterized in that: The first outer frame bracket (1) and the second outer frame bracket (2) are integrally formed, and the planes where the two are located have a height difference.

3. The vehicle exhaust pipe according to claim 1, characterized in that: The size of the micropore (31) is adjusted by adjusting the micropore width (8) and the micropore length (10).

4. The vehicle exhaust pipe according to claim 1, characterized in that: The porosity of the micropores (31) on the puncture mesh plate (3) is adjusted by adjusting the longitudinal spacing (9), the transverse spacing (11) of the micropores in the same row, and the longitudinal spacing (12) between two adjacent rows of micropores. The porosity of the micropores (31) is less than 50%.

5. The vehicle exhaust pipe according to claim 1, characterized in that: The positioning holes comprise a first positioning hole (4) and a second positioning hole (5), the first positioning hole (4) and the second positioning hole (5) being arranged along the axial direction of the exhaust pipe (6) and respectively arranged on both sides of the first outer frame bracket (1).

6. The vehicle exhaust pipe according to claim 1, characterized in that: The opening on the exhaust pipe (6) has the same shape and specifications as the punctured mesh plate (3).

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