Basalt felt and metal composite automobile pipe fitting hard package heat insulation cover

Abstract

The invention provides a basalt felt and metal composite automobile pipe fitting hard package heat insulation cover, and relates to the technical field of automobile heat insulation parts, the basalt felt and metal composite automobile pipe fitting hard package heat insulation cover comprises an outer metal layer, an outer basalt felt, an inner metal layer and an inner basalt felt in sequence from outside to inside, and the inner metal layer and the inner basalt felt are made of the same material as the outer metal layer; a plurality of basalt felt holes are formed in the outer basalt felt, and a plurality of outwards-protruding basalt felt thickening parts are integrally arranged on the side, facing the inner metal layer, of the outer basalt felt. A plurality of metal layer holes are formed in the inner metal layer, and a plurality of convex metal layer thickening parts are integrally arranged on one side, facing the outer basalt felt, of the inner metal layer; and the basalt felt thickening parts are in one-to-one correspondence with the metal layer holes, penetrate through the metal layer holes and are fixed together with the inner basalt felt. The hard package heat shield for the automobile pipe fitting not only has high strength and efficient heat insulation performance, but also can effectively solve the problem of interface bonding between the basalt felt and the metal layer.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive heat insulation components, and specifically to a hard-packed heat insulation cover for automotive pipe fittings composed of basalt felt and metal Background Art

[0002] In the existing technology of hard-packed heat insulation covers for automotive pipe fittings, the structure of single-layer metal and single-layer basalt felt often fails to meet the requirements of high strength and high-efficiency heat insulation. Especially in high-temperature and complex stress environments, the single-layer structure is prone to deformation or damage due to insufficient strength, and the heat insulation effect is also limited. In addition, as an inorganic fiber material, the smooth surface of basalt felt and the difference in thermal expansion coefficient between basalt felt and metal materials lead to easy interface bonding problems between basalt felt and the metal layer. Specifically, this problem is mainly reflected in two aspects: 1. Low interface bonding strength: The surface of basalt felt is smooth, and it is difficult to form a firm bond with the bonding surface of metal materials. This will cause peeling or debonding between basalt felt and the metal layer during long-term use or when subjected to external force impact, thus affecting the overall structural stability and service life of the heat insulation cover.

[0003] 2. Mismatch of thermal expansion coefficients: There are significant differences in the thermal expansion coefficients of basalt felt and metal materials. In high-temperature environments or when the temperature changes rapidly, this difference in thermal expansion coefficient will cause stress concentration between materials, leading to cracks, deformation, and even damage, seriously affecting the heat insulation performance and durability of the heat insulation cover.

[0004] Therefore, how to design a hard-packed heat insulation cover for automotive pipe fittings that not only has high strength and high-efficiency heat insulation performance but also can effectively solve the interface bonding problem between basalt felt and the metal layer has become an urgent technical problem to be solved. Summary of the Invention

[0005] The purpose of the present invention is to provide a hard-packed heat insulation cover for automotive pipe fittings composed of basalt felt and metal. It is a hard-packed heat insulation cover for automotive pipe fittings that not only has high strength and high-efficiency heat insulation performance but also can effectively solve the interface bonding problem between basalt felt and the metal layer.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: A hard-packed heat insulation cover for automotive pipe fittings composed of basalt felt and metal, which sequentially includes an outer metal layer, an outer basalt felt, an inner metal layer made of the same material as the outer metal layer, and an inner basalt felt from outside to inside; A plurality of basalt felt holes are provided in the outer basalt felt, and a plurality of outwardly convex basalt felt thickening parts are integrally provided on the side of the outer basalt felt facing the inner metal layer; A plurality of metal layer holes are formed in the inner metal layer, and a plurality of outwardly convex metal layer thickening parts are integrally arranged on one side of the inner metal layer facing the outer basalt felt; Each of the basalt felt thickening parts corresponds to one of the metal layer holes, and the basalt felt thickening part passes through the metal layer hole and is fixed to the inner basalt felt; Each of the metal layer thickening parts corresponds to one of the basalt felt holes, and the metal layer thickening part passes through the basalt felt hole and is fixed to the outer metal layer.

[0007] In some embodiments, both the outer metal layer and the inner metal layer are made of aluminum alloy.

[0008] In some embodiments, an adhesive is filled between the outer metal layer and the outer basalt felt, between the outer basalt felt and the inner metal layer, and between the inner metal layer and the inner basalt felt.

[0009] In some embodiments, the thickness of the basalt felt thickening part is greater than the axial length of the metal layer hole, and the thickness of the metal layer thickening part is greater than the axial length of the basalt felt hole.

[0010] In some embodiments, the outer metal layer is welded to the metal layer thickening part, and the inner basalt felt is woven with the basalt felt thickening part.

[0011] In some embodiments, the basalt felt holes and the basalt felt thickening parts, and the metal layer holes and the metal layer thickening parts are uniformly staggered.

[0012] In some embodiments, the basalt felt holes and the metal layer thickening parts, and the metal layer holes and the basalt felt thickening parts are in interference contact.

[0013] In some embodiments, a positioning block is further included on a side of the outer metal layer away from the outer basalt felt, and a pin or a jack is arranged on the positioning block.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The design of the double-layer metal layer of the present invention significantly improves the overall structural strength of the heat shield, enabling it to better resist external force impacts and deformations, extending the service life. The superimposed use of the double-layer basalt felt effectively increases the thickness and density of the heat insulation layer, improves the heat insulation performance, can better block heat transfer, and protects the automotive pipe fittings from high temperatures. Overall, the strength and the heat insulation effect are doubled.

[0015] In the present invention, by providing a basalt felt thickening portion on the outer basalt felt and a metal layer thickening portion on the inner metal layer, these thickening portions can respectively pass through the corresponding metal layer holes and basalt felt holes, realizing the intertwined fixation between the basalt felt and the metal layer located in the middle layer. This structural design enables the combination of structures with the same material, effectively enhancing the interfacial bonding strength between the basalt felt and the metal layer. Moreover, the intertwined fixation structure can also absorb and relieve to a certain extent the stress generated due to the difference in thermal expansion coefficients, avoiding cracks, deformations or damages caused by stress concentration, and improving the durability and reliability of the heat shield.

[0016] In summary, the heat shield of the present invention combines the advantages of a double-layer metal layer and a double-layer basalt felt, as well as a unique intertwined fixation structure, making it excellent in terms of strength, heat insulation performance, durability and reliability, and meeting the requirements of automotive pipe fittings for high-performance heat shields. Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the heat shield of the present invention; Figure 2 is a schematic diagram of the outer structure of the outer basalt felt of the heat shield of the present invention; Figure 3 is a schematic diagram of the inner structure of the outer basalt felt of the heat shield of the present invention; Figure 4 is a schematic diagram of the outer structure of the inner metal layer of the heat shield of the present invention; Figure 5 is a schematic diagram of the inner structure of the inner metal layer of the heat shield of the present invention; Figure 6 is a schematic diagram of the split structure of each layer of the heat shield of the present invention (vertical section); Figure 7 is a schematic diagram of the combined structure of each layer of the heat shield of the present invention (vertical section); Figure 8 is Figure 7 an enlarged view of part A of

[0018] In the figures: 1, outer metal layer; 2, outer basalt felt; 201, basalt felt hole; 202, basalt felt thickening portion; 3, inner metal layer; 301, metal layer hole; 302, metal layer thickening portion; 4, inner basalt felt; 5, positioning block. Detailed Description of the Embodiment

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figures 1-8 This embodiment provides a basalt felt and metal composite automotive pipe hard-pack heat insulation cover, which is characterized by: From outside to inside, it includes an outer metal layer 1, an outer basalt felt 2, an inner metal layer 3 made of the same material as the outer metal layer 1, and an inner basalt felt 4; The structure adopts a double metal layer (outer metal layer 1 and inner metal layer 3) design. Compared with a single metal layer, the double metal layer is doubled in thickness, thereby significantly improving the structural strength of the heat shield. The metal layer serves as the skeleton of the heat shield, and its increased thickness directly enhances the heat shield's ability to withstand external force impact and deformation. The outer metal layer 1 and the inner metal layer 3 are made of the same material, which enables the two to work together to resist external forces when subjected to force. This design avoids the stress concentration problem caused by the difference in mechanical properties of different materials when subjected to force, improves the overall strength and stability of the heat shield, and can also avoid the interface bonding problem caused by the combination of different materials; In addition, this heat shield also adopts the design of a double-layer heat insulation layer (outer basalt felt 2 and inner basalt felt 4). Compared with a single-layer heat insulation layer, the superimposed use of the double-layer basalt felt effectively increases the thickness and density of the heat insulation layer, improves the heat insulation performance, can better block the heat transfer, protects the automotive pipe fittings from the influence of high temperature, and although the basalt felt itself is not a component that mainly bears the structural strength, as a heat insulation layer, the double-layer design increases the overall thickness and density of the heat shield, which also enhances the structural strength of the heat shield to a certain extent. Especially in resisting thermal stress, the double-layer basalt felt not only improves the heat insulation performance but also protects the intermediate metal layer (inner metal layer 3) from the direct action of high temperature through its good heat insulation effect, thereby indirectly enhancing the overall strength of the metal layer, because high temperature may cause all metal layers to soften or deform, and the effective heat insulation of the double-layer basalt felt avoids the occurrence of this situation; A plurality of basalt felt holes 201 are formed in the outer basalt felt 2, and a plurality of outwardly convex basalt felt thickening parts 202 are integrally arranged on one side of the outer basalt felt 2 facing the inner metal layer 3. A plurality of metal layer holes 301 are formed in the inner metal layer 3, and a plurality of outwardly convex metal layer thickening parts 302 are integrally arranged on one side of the inner metal layer 3 facing the outer basalt felt 2. Each of the basalt felt thickening parts 202 corresponds to one of the metal layer holes 301, the basalt felt thickening part 202 passes through the metal layer hole 301 and is fixed to the inner basalt felt 4, each of the metal layer thickening parts 302 corresponds to one of the basalt felt holes 201, and the metal layer thickening part 302 passes through the basalt felt hole 201 and is fixed to the outer metal layer 1; In the present invention, by providing the basalt felt thickening part 202 on the outer basalt felt 2 and the metal layer thickening part 302 on the inner metal layer 3, and then allowing the basalt felt thickening part 202 and the metal layer thickening part 302 to pass through the corresponding metal layer hole 301 and basalt felt hole 201 respectively, and then fixing them to the inner basalt felt 4 and the outer metal layer 1 of the same material respectively. This design not only realizes the intertwined fixation between the outer basalt felt 2 and the inner metal layer 3, but also effectively eliminates the interface bonding problems that may be caused by material differences through the tight combination between the same material structures. The connection of the same material ensures good compatibility and matching at the interface, reduces the generation of interface defects, and thus significantly enhances the interface bonding strength between the basalt felt and the metal layer. In addition, this intertwined fixation structure can also absorb and relieve the stress generated due to the difference in thermal expansion coefficient to a certain extent, avoiding cracks, deformation or damage caused by stress concentration, and further improving the durability and reliability of the heat shield; Specifically, the unique design of the basalt felt thickening part 202 and the metal layer thickening part 302 forms a stable interlocking structure after they pass through the inner metal layer 3 and the outer basalt felt 2 and are fixed to the corresponding inner basalt felt 4 and outer metal layer 1. This structure not only strengthens the mechanical connection between the basalt felt and the metal layer, but also improves the shear resistance of the entire heat shield. The advantage of connecting with the same material is that it avoids problems such as weak interface bonding and easy detachment caused by material differences, ensuring the stability and reliability at the interface. At the same time, considering the difference in the coefficient of thermal expansion between the basalt felt and the metal layer, the intertwined fixing design allows a certain relative displacement of each layer during temperature changes, thereby effectively absorbing thermal stress and reducing structural damage caused by thermal stress concentration.

[0024] Therefore, generally speaking, through the design of the double-layer metal layer and the double-layer basalt felt and the realization of the intertwined fixing structure, the present invention effectively solves the interface bonding problem between the basalt felt and the metal layer, improves the strength, heat insulation performance, durability and reliability of the heat shield, and meets the requirements of automotive pipe fittings for high-performance heat shields.

[0025] In some embodiments, both the outer metal layer 1 and the inner metal layer 3 are made of aluminum alloy. On the one hand, the aluminum alloy material has a natural oxide film protection layer, which can effectively resist the corrosion of the atmosphere, water vapor and various chemical media, thereby extending the service life of the heat shield. In applications such as automobiles that are often exposed to various environmental conditions, the corrosion resistance of aluminum alloy is particularly important, which ensures the integrity of the structure and the stability of the function of the heat shield during long-term use. On the other hand, aluminum alloy has good plasticity and workability, which is convenient for processing into complex shapes and structures through processes such as stamping, welding, and cutting to meet the customized requirements of the heat shield. At the same time, the wide application and large-scale production of aluminum alloy reduce the raw material cost, making the heat shield made of aluminum alloy have an advantage in terms of cost performance.

[0026] In some embodiments, an adhesive is filled between the outer metal layer 1 and the outer basalt felt 2, between the outer basalt felt 2 and the inner metal layer 3, and between the inner metal layer 3 and the inner basalt felt 4. The adhesive is preferably epoxy resin glue. As a bridge connecting the metal layer and the basalt felt, its excellent bonding strength ensures the tight combination of each layer. This tight combination not only improves the overall structural strength of the heat shield but also effectively prevents the degradation of the heat insulation performance caused by loosening or falling off between layers. During the driving of the vehicle, the heat shield may be subjected to external forces such as vibration and impact. The strong bonding force of the adhesive can ensure that each layer works together under force to resist the external force jointly, thus maintaining the integrity and stability of the heat shield. Moreover, through the bonding effect of the adhesive, the metal layer and the basalt felt are more firmly intertwined together, forming a more stable composite structure, thereby further enhancing the structural strength of the intertwined layers.

[0027] In some embodiments, as Figures 7-8 shown, the thickness of the basalt felt thickening part 202 is greater than the axial length of the metal layer hole 301, and the thickness of the metal layer thickening part 302 is greater than the axial length of the basalt felt hole 201, so as to ensure that when the outer metal layer 1, the outer basalt felt 2, the inner metal layer 3, and the inner basalt felt 4 are combined together, there is a gap between the outer metal layer 1 and the outer basalt felt 2, and between the inner metal layer 3 and the inner basalt felt 4. The gap is used to accommodate the adhesive. Since there are obvious interfacial bonding problems between the metal layer and the basalt felt, instead of making them closely fit, it is better to leave a space for accommodating the adhesive to ensure that the adhesive can be fully and sufficiently distributed between the metal layer and the basalt felt, thereby ensuring the bonding strength between the metal layer and the basalt felt.

[0028] In some embodiments, the outer metal layer 1 is welded to the metal layer thickening portion 302, and the inner basalt felt 4 is woven together with the basalt felt thickening portion 202. By welding the outer metal layer 1 to the metal layer thickening portion 302, a firm connection between the metal layers is achieved. Welding, as a strong connection method, can ensure that the outer metal layer 1 and the metal layer thickening portion 302 work together when subjected to force, and jointly resist external force impact and deformation, thereby significantly enhancing the structural stability of the heat insulation cover. This strong connection method avoids the problem of loosening or falling off between layers caused by weak connection, and ensures the integrity and reliability of the heat insulation cover during long-term use. The inner basalt felt 4 is combined with the basalt felt thickening portion 202 by weaving, and this combination method makes the fibers between the basalt felt layers intertwined and entangled, forming a tight mechanical connection. This mechanical connection not only enhances the interface bonding strength between the basalt felt layers, but also improves the shear resistance of the heat insulation cover. At the same time, the weaving combination method allows the basalt felt layer to have a certain relative displacement when the temperature changes, thereby effectively absorbing the thermal stress and reducing the structural damage caused by the concentration of thermal stress.

[0029] In some embodiments, Figures 3-4 As shown, each of the basalt felt holes 201 and each of the basalt felt thickened parts 202, and each of the metal layer holes 301 and each of the metal layer thickened parts 302 are evenly staggered. Such a design makes the heat insulation cover more uniform in structure on the one hand. This uniformity is not only reflected in the neat and beautiful appearance, but more importantly, the balance in mechanical properties. The uniform distribution of each part avoids the problem of stress concentration caused by local concentration, so that the heat insulation cover can disperse and withstand external forces more evenly when subjected to force, thereby improving the overall structural strength and stability. On the other hand, a tighter interlocking structure is also formed. This interlocking structure not only enhances the mechanical connection between the basalt felt and the metal layer, but also improves the shear resistance of the heat insulation cover. When the heat insulation cover is subjected to external force, this interlocking structure can effectively prevent the relative sliding between the layers, thereby maintaining the integrity and stability of the heat insulation cover.

[0030] In some embodiments, the pores 201 of the basalt felt are in interference contact with the thickened portion 302 of the metal layer, and the pores 301 of the metal layer are in interference contact with the thickened portion 202 of the basalt felt. Such a design achieves a more secure fixing effect. This interference fit enables the thickened portion 202 of the basalt felt and the thickened portion 302 of the metal layer to be firmly clamped in the corresponding pores after passing through them, and are not prone to loosening or falling off. This secure fixing effect enhances the overall structural stability of the heat shield and ensures reliable connection between the layers. Moreover, the design of interference contact further improves the reliability of the interlocking structure. Under the action of the interference fit, the thickened portion 202 of the basalt felt and the thickened portion 302 of the metal layer are more firmly locked with each other, forming a more stable composite structure. This stable composite structure not only enhances the shear resistance of the heat shield but also improves the resistance of the heat shield to external force impacts.

[0031] In some embodiments, as Figure 1 shown, it further includes a positioning block 5 disposed on the side of the outer metal layer 1 away from the outer basalt felt 2. The positioning block 5 is provided with a pin or a socket for detachably connecting to an automotive pipe fitting or a mounting bracket.

[0032] This specific embodiment is only an interpretation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. An automotive pipe hard-pack heat insulation cover with a composite of basalt felt and metal, characterized in that: It sequentially includes an outer metal layer (1), an outer basalt felt (2), an inner metal layer (3) made of the same material as the outer metal layer (1), and an inner basalt felt (4) from outside to inside; A plurality of basalt felt holes (201) are formed in the outer basalt felt (2), and a plurality of outwardly convex basalt felt thickening parts (202) are integrally arranged on one side of the outer basalt felt (2) facing the inner metal layer (3); A plurality of metal layer holes (301) are formed in the inner metal layer (3), and a plurality of outwardly convex metal layer thickening parts (302) are integrally arranged on one side of the inner metal layer (3) facing the outer basalt felt (2); Each of the basalt felt thickening parts (202) corresponds to each of the metal layer holes (301), and the basalt felt thickening part (202) passes through the metal layer hole (301) and is fixed to the inner basalt felt (4); Each of the metal layer thickening parts (302) corresponds to each of the basalt felt holes (201), and the metal layer thickening part (302) passes through the basalt felt hole (201) and is fixed to the outer metal layer (1).

2. The automotive pipe hard package heat insulation cover with basalt felt and metal composite according to claim 1, characterized in that: Both the outer metal layer (1) and the inner metal layer (3) are made of aluminum alloy material.

3. A hard package heat insulation cover for an automotive pipe fitting with a composite of basalt felt and metal according to claim 1, characterized in that: An adhesive is filled between the outer metal layer (1) and the outer basalt felt (2), between the outer basalt felt (2) and the inner metal layer (3), and between the inner metal layer (3) and the inner basalt felt (4).

4. The automotive pipe hard package heat shield with basalt felt and metal composite according to claim 3, characterized in that: The thickness of the basalt felt thickening part (202) is greater than the axial length of the metal layer hole (301), and the thickness of the metal layer thickening part (302) is greater than the axial length of the basalt felt hole (201).

5. The automotive pipe hard package heat insulation cover with basalt felt and metal composite according to claim 1, characterized in that: The outer metal layer (1) is welded to the metal layer thickening part (302), and the inner basalt felt (4) is woven with the basalt felt thickening part (202).

6. The automotive pipe hard package heat shield with a composite of basalt felt and metal according to claim 1, characterized in that: Each of the basalt felt holes (201) and each of the basalt felt thickening parts (202), each of the metal layer holes (301) and each of the metal layer thickening parts (302) are evenly and staggeredly distributed.

7. The automotive pipe hard package heat insulation cover with basalt felt and metal composite according to claim 1, characterized in that: The basalt felt holes (201) and the metal layer thickening parts (302), the metal layer holes (301) and the basalt felt thickening parts (202) are in interference contact.

8. The automotive pipe hard package heat insulation cover with a composite of basalt felt and metal according to claim 1, characterized in that: It further includes a positioning block (5) arranged on the side of the outer metal layer (1) away from the outer basalt felt (2), and a plug or a socket is arranged on the positioning block (5).

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