Double-layer heat shield connecting structure
By using a double-layer heat shield with a patterned metal plate design at the catalyst of the automotive exhaust system and forming a Z-shaped edging structure at the flange edge, the problem of easy separation between the metal layer and the heat insulation layer under thermal expansion and contraction and vibration is solved, achieving a more stable connection and a longer service life.
Patent Information
- Application Number
- CN202520524930.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Due to the different materials used in the metal layer and the insulation layer, under long-term thermal expansion and contraction cycles and mechanical vibration conditions, micro-displacement is likely to occur and gaps will gradually form, leading to a decrease in thermal barrier performance.
The upper and lower heat insulation covers, designed with patterned metal plates, are fixed with staples and form a Z-shaped edging structure at the flange edge to enhance connection stability. At the same time, glass fiber or ceramic fiber materials are used to improve heat insulation and corrosion resistance.
It improves the overall structural strength and friction of the heat insulation cover, reduces vibration-induced failure, extends its service life, and maintains good heat insulation performance.
Smart Images
Figure CN223676365U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of heat shield, concretely relates to a double -layer heat shield connecting structure. BACKGROUND
[0002] The core component of the automobile exhaust system, the exhaust pipe catalyst, generates heat exceeding several hundred degrees Celsius in the high-temperature chemical reaction inside during operation. In order to avoid the high temperature of the catalyst affecting the exhaust pipe or the automobile chassis, the current mainstream solution is to coat the outer surface of the catalyst with a heat shield.
[0003] The current heat insulation layer is mainly a double-layer structure, in which the outer layer is a metal protective plate made of high-temperature-resistant stainless steel or aluminum alloy material, and the inner layer is a heat insulation layer made of heat insulation material, which weakens the high-temperature heat radiation of the catalyst through the heat insulation effect of the heat insulation layer. However, due to the difference in materials between the metal layer and the heat insulation layer, micro-displacement occurs at the two interfaces under long-term thermal expansion and contraction cycles and mechanical vibration conditions, and gradually forms a gap, eventually leading to interlayer separation failure and a decrease in thermal resistance performance. SUMMARY
[0004] The utility model aims at solving the problem that the metal layer and the heat insulation layer in the prior art differ in material, micro-displacement occurs at the two interfaces under long-term thermal expansion and contraction cycles and mechanical vibration conditions, and gradually forms a gap, eventually leading to interlayer separation failure and a decrease in thermal resistance performance.
[0005] To solve the above problems, the utility model provides a double -layer heat shield connecting structure, including all being half -cylinder's upper heat shield and lower heat shield, upper heat shield and lower heat shield are all patterned metal sheet, the inner peripheral wall of upper heat shield is equipped with upper heat insulation layer, and upper heat shield and upper heat insulation layer realize fixed with code nail, the inner peripheral wall of lower heat shield is equipped with lower heat insulation layer, and lower heat shield and lower heat insulation layer realize fixed with code nail, upper heat shield and lower heat shield are used for respectively sticking to the upper side and the lower side of the opposite hand article, and the left side and the right side of upper heat shield are fixedly connected with the left side and the right side of lower heat shield respectively.
[0006] The above-mentioned scheme designs the upper heat shield and the lower heat shield as patterned metal sheets. Due to the existence of the convex and concave patterns on the surfaces of the upper heat shield and the lower heat shield, on the one hand, the overall structural strength of the upper heat shield and the lower heat shield is improved, and on the other hand, the contact area between the upper heat shield and the upper heat insulation layer and between the lower heat shield and the lower heat insulation layer is increased, the friction force between them is improved, and they are more stable in sticking to each other. At the same time, the fastening effect between the upper heat shield and the upper heat insulation layer and between the lower heat shield and the lower heat insulation layer is realized through the dowels. Compared with the prior art, the above-mentioned scheme can reduce the vibration and dispersion failure of the heat shield and the heat insulation layer under long-term vibration conditions, and improve the overall durability.
[0007] In an improved scheme, the left and right sides of the upper heat shield are respectively provided with flange edges protruding from the upper heat insulation layer, the left and right sides of the lower heat shield are respectively provided with flange edges protruding from the lower heat insulation layer, and the two flange edges of the upper heat shield are respectively attached to and connected with the two flange edges of the lower heat shield, so that the stable butt joint between the upper heat shield and the lower heat shield is realized through the connection of the flange edges.
[0008] In an improved scheme, the flange edge of the upper heat shield and the same-side flange edge of the lower heat shield are bent to form a Z-shaped edge covering structure, so as to improve the connection stability of the flange edge of the upper heat shield and the same-side flange edge of the lower heat shield through the edge covering structure.
[0009] In an improved scheme, the bending part of the Z-shaped edge covering structure of the flange edge of the upper heat shield and the same-side flange edge of the lower heat shield is a rounded transition, so as to avoid cutting and other problems to the outside.
[0010] In an improved scheme, the materials of the upper heat insulation layer and the lower heat insulation layer are both glass fiber or ceramic fiber, which not only has good heat insulation effect, but also has good corrosion resistance.
[0011] In an improved scheme, the wall thickness of the upper heat shield and the lower heat shield is less than 0.25 mm, so as to have good thinness. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is an explosion schematic view of a double-layer heat shield connection structure;
[0013] Figure 2 It is a cross-sectional schematic view of a double-layer heat shield connection structure;
[0014] Figure 3 It is Figure 2 It is a local enlarged schematic view of area A in the middle;
[0015] Figure 4 It is Figure 2 It is a local enlarged schematic view of area B in the middle.
[0016] BRIEF DESCRIPTION OF DRAWINGS,
[0017] 1, upper heat shield; 2, lower heat shield; 3, upper heat insulation layer; 4, lower heat insulation layer; 5, code nail; 6, flange edge; 61, edge covering structure. DETAILED DESCRIPTION
[0018] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments as needed in order to adapt to specific application occasions.
[0019] In the following description of the embodiments, it is necessary to note that unless explicitly specified and limited, the terms "connected", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0020] In the embodiments of the present application, unless explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0021] The present application will be further described in detail below in combination with the drawings and specific embodiments.
[0022] Please refer to Figures 1-4 The embodiment of the utility model provides a double -layer heat shield connecting structure, including all be half -barrel -shaped upper heat shield 1 and lower heat shield 2, upper heat shield 1 and lower heat shield 2 are all patterned sheet metal, the inner peripheral wall of upper heat shield 1 is equipped with upper heat insulation layer 3, and upper heat shield 1 is fixed with upper heat insulation layer 3 through peg 5, the inner peripheral wall of lower heat shield 2 is equipped with lower heat insulation layer 4, and lower heat shield 2 is fixed with lower heat insulation layer 4 through peg 5, upper heat shield 1 and lower heat shield 2 are used to respectively adhere to the upper side and the lower side of the opposite hand article, and the left side and the right side of upper heat shield 1 are fixedly connected with the left side and the right side of lower heat shield 2 respectively.
[0023] The above scheme is that upper heat shield 1 and lower heat shield 2 are all designed as patterned sheet metal, because of the existence of the convex and concave patterns on the surface of upper heat shield 1 and lower heat shield 2, on the one hand, the overall structural strength of upper heat shield 1 and lower heat shield 2 is improved, on the other hand, the contact area of upper heat shield 1 and upper heat insulation layer 3, lower heat shield 2 and lower heat insulation layer 4 is increased, the friction of each other is improved, and the adhesion of each other is more stable, and at the same time, the fastening effect between upper heat shield 1 and upper heat insulation layer 3, lower heat shield 2 and lower heat insulation layer 4 is realized through peg 5, compared with the prior art, the above scheme can reduce the vibration and dispersion failure of heat shield 2 and heat insulation layer under long-term vibration working condition, and the overall durability life is improved.
[0024] The specific way of fixing the left and right sides of the upper heat shield 1 to the left and right sides of the lower heat shield 2 can be welding or other common forms. In the embodiment, the left and right sides of the upper heat shield 1 are respectively provided with flange edges 6 protruding from the upper heat insulation layer 3, the left and right sides of the lower heat shield 2 are respectively provided with flange edges 6 protruding from the lower heat insulation layer 4, and the two flange edges 6 of the upper heat shield 1 are respectively attached to and connected with the two flange edges 6 of the lower heat shield 2, so that the stable butt joint between the upper heat shield 1 and the lower heat shield 2 is realized through the connection of the flange edges 6.
[0025] More specifically, in the embodiment, the flange edges 6 of the upper heat shield 1 and the flange edges 6 of the same side of the lower heat shield 2 are bent to form Z-shaped edge covering structures 61, so as to improve the connection stability of the flange edges 6 of the upper heat shield 1 and the flange edges 6 of the same side of the lower heat shield 2 through the edge covering structures 61.
[0026] Further, the bending parts of the Z-shaped edge covering structures 61 of the flange edges 6 of the upper heat shield 1 and the flange edges 6 of the same side of the lower heat shield 2 are rounded transitions, so as to avoid cutting and other problems to the outside.
[0027] In the embodiment, the materials of the upper heat insulation layer 3 and the lower heat insulation layer 4 are both glass fiber or ceramic fiber, which not only has good heat insulation effect, but also has good corrosion resistance.
[0028] In the embodiment, the wall thicknesses of the upper heat shield 1 and the lower heat shield 2 are less than 0.25 mm, so as to have good thinness.
[0029] It should be noted that in the description of the present application, the terms indicating the direction or position relationship are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application; all directional indications (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.
[0030] In the description of the application, the description of the terms "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" and the like means that the specific features, mechanisms, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.
[0031] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A double-layer heat insulation cover connection structure, characterized in that, The application relates to a heat insulation cover, which comprises an upper heat insulation cover (1) and a lower heat insulation cover (2) both in the shape of a half cylinder, an inner circumferential wall of the upper heat insulation cover (1) is provided with an upper heat insulation layer (3), the upper heat insulation cover (1) and the upper heat insulation layer (3) are fixed through nails (5), an inner circumferential wall of the lower heat insulation cover (2) is provided with a lower heat insulation layer (4), the lower heat insulation cover (2) and the lower heat insulation layer (4) are fixed through nails (5), the upper heat insulation cover (1) and the lower heat insulation cover (2) are used for being attached to the upper side and the lower side of a counterpart respectively, and the left side and the right side of the upper heat insulation cover (1) are fixedly connected with the left side and the right side of the lower heat insulation cover (2) respectively.
2. The dual-layer grommet connection structure of claim 1, wherein The left side and the right side of the upper heat insulation cover (1) are respectively provided with flange edges (6) which protrude from the upper heat insulation layer (3), the left side and the right side of the lower heat insulation cover (2) are respectively provided with flange edges (6) which protrude from the lower heat insulation layer (4), and the two flange edges (6) of the upper heat insulation cover (1) are attached to and connected with the two flange edges (6) of the lower heat insulation cover (2) respectively.
3. The dual-layer grommet connection structure of claim 2, wherein, The flange edges (6) of the upper heat insulation cover (1) and the flange edges (6) of the lower heat insulation cover (2) on the same side are bent to form Z-shaped edge covering structures (61).
4. The dual-layer grommet connection structure of claim 1, wherein The material of the upper heat insulation layer (3) and the lower heat insulation layer (4) is glass fiber or ceramic fiber.
5. The dual-layer grommet connection structure of claim 1, wherein The wall thickness of the upper heat insulation cover (1) and the lower heat insulation cover (2) is less than 0.25 mm.