A multi-layered structure pipe and sheet
By employing a multi-layered structural design and welding and bonding of the aluminum alloy outer layer, the problems of corrosion resistance and gloss of the pipes and plates were solved, achieving a combination of high strength, corrosion resistance, and aesthetic appeal.
Patent Information
- Application Number
- CN202522197984.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-17
AI Technical Summary
Existing pipes and plates are inadequate in terms of corrosion resistance and appearance gloss, especially carbon steel and galvanized steel, which are prone to corrosion, and plastic materials, which are difficult to form a metallic luster, affecting the performance and application scenarios.
The design employs a multi-layer structure, with an inner tube of the substrate encased in an aluminum or aluminum alloy outer tube, which is then fixed together using adhesive layers and welding techniques. The outer layer is made of aluminum or aluminum alloy and is sealed with foaming material to form a dense oxide film that enhances corrosion resistance and gloss.
It achieves high strength, good corrosion resistance, and a smooth surface, reduces usage costs, is suitable for various environments, and improves product stability and aesthetics.
Smart Images
Figure CN224928654U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building materials technology, specifically to a multi-layer structure pipe and plate. Background Technology
[0002] Pipes refer to profiles with a completely closed cross-section, whose cross-sectional contour forms one or more closed cavities, such as square tubes, rectangular tubes, round tubes, and elliptical tubes. They are widely used in industrial production and daily life. Plates refer to profiles with a cross-section that is straight, right-angled, C-shaped, U-shaped, or I-shaped. Pipes and plates are commonly made of materials such as aluminum alloy, carbon steel, galvanized steel, stainless steel, and plastics. Carbon steel and galvanized steel offer high structural strength and low cost, making them economical. However, carbon steel generally has a poor appearance and smoothness, and even with surface spraying, the coating is prone to peeling, affecting not only the appearance but also causing further corrosion. While galvanized carbon steel has a good appearance, the galvanized layer is easily damaged during welding and cutting, and its lifespan is limited in harsh environments, requiring coating repairs, which is inconvenient. Plastic pipes and plates, although having good corrosion resistance, are difficult to achieve a metallic luster, limiting their application scenarios. Utility Model Content
[0003] This utility model discloses a multi-layered pipe, which solves the technical problems of high usage cost or poor corrosion resistance in existing pipes. It features a reasonable structure, good structural strength and corrosion resistance, and facilitates the formation of a smooth surface. The technical solution adopted is as follows: A multi-layered pipe includes a base inner tube, and an outer tube is fixedly sleeved on the outside of the base inner tube. The outer tube is made of aluminum or aluminum alloy.
[0004] Based on the above technical solution, the outer tube is formed by covering the inner tube of the substrate with aluminum or aluminum alloy sheet, and welding the two sides of the aluminum or aluminum alloy sheet extending axially along the inner tube of the substrate.
[0005] Based on the above technical solution, the two sides of the aluminum material or aluminum alloy sheet are welded by laser welding, tungsten inert gas welding or gas metal arc welding.
[0006] Based on the above technical solution, the inner tube of the substrate is a galvanized steel pipe or a carbon steel pipe.
[0007] Based on the above technical solution, an adhesive layer is provided between the inner tube and the outer tube of the substrate to bond the inner tube and the outer tube of the substrate.
[0008] Based on the above technical solution, the adhesive layer includes adhesive points, and the adhesive points are made of quick-drying adhesive.
[0009] Based on the above technical solution, foam material is filled between the inner tube and the outer tube of the substrate to seal and connect the inner tube and the outer tube of the substrate.
[0010] Based on the above technical solution, the outer edge surface of the inner tube of the substrate is provided with a number of recesses, which are used to accommodate a number of bonding points forming the adhesive layer, or to increase the contact area with the foaming material.
[0011] Based on the above technical solution, the outer tube expands thermally and covers the outer tube of the substrate, so that the cooled outer tube is tightly fitted on the outer tube of the substrate.
[0012] Based on the above technical solution, the wall thickness of the outer tube is 0.5~3mm.
[0013] A multi-layer structural board includes a plate-shaped substrate, to which an outer layer plate is fixedly covered. The outer layer plate is made of aluminum or aluminum alloy. The outer layer plate may completely cover the plate-shaped substrate or partially cover it.
[0014] Based on the above technical solution, an adhesive layer is provided between the plate-shaped substrate and the outer layer to bond the plate-shaped substrate and the outer layer.
[0015] Based on the above technical solutions, the cross-section of the plate-shaped substrate is in the shape of a straight line, a right angle, a C-shape, a U-shape, or an I-shape.
[0016] Beneficial effects This utility model has a reasonable structure. In the multi-layer structure pipe, an outer tube is fixedly sleeved around the inner tube of the base material. The outer tube is made of aluminum or aluminum alloy. In the multi-layer structure plate, an outer plate is fixedly wrapped around the plate-shaped base material. The outer plate is made of aluminum or aluminum alloy. On the one hand, it is conducive to forming a smooth surface with metallic luster, which is aesthetically pleasing. On the other hand, the outer tube made of aluminum or aluminum alloy has excellent corrosion resistance, and a dense oxide film is formed on its surface, which is suitable for various environments and helps to improve service life. Thirdly, it helps to improve the structural strength of the multi-layer structure profile, and has good economic benefits and low operating costs.
[0017] In this invention, the inner and outer tubes of the substrate, or the plate-shaped substrate and the outer layer, are bonded and fixed together by an adhesive layer, or sealed with foam material. This ensures proper positioning of the inner and outer tubes, and the plate-shaped substrate and the outer layer, preventing displacement during use and transportation, and improving product stability. Furthermore, the outer edge of the inner tube can have several recesses to accommodate the bonding points or increase the contact area with the foam material. Alternatively, utilizing the principle of thermal expansion and contraction, the outer tube can be tightly fitted over the inner tube, facilitating processing. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.
[0019] Figure 1 : A three-dimensional structural diagram of the multi-layered pipe in Example 1; Figure 2 Example 1: A schematic diagram of the structure of a multi-layered pipe with several bonding points arranged in the recessed part of the outer edge of the inner tube of the substrate; Figure 3 : A cross-sectional structural schematic diagram of the side view of the multi-layered pipe in Example 2; Figure 4 : Figure 3 A magnified view of the structure at point A in the middle; Figure 5 Schematic diagram of the three-dimensional structure of multi-layer structural panels Figure 1 ; Figure 6 Schematic diagram of the three-dimensional structure of multi-layer structural panels Figure 2 ; Detailed Implementation The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.
[0020] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0021] In this document, unless otherwise stated, the term "multiple" means two or more.
[0022] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.
[0023] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.
[0024] Example 1 of multi-layer structure pipe like Figures 1-2 The illustrated multi-layered pipe includes a base inner tube 1, which is made of galvanized steel or carbon steel, and can be a standard closed-end profile or a non-standard pipe. It features high structural strength and good economic benefits. An outer tube 2 is fixedly sleeved around the base inner tube 1, and the outer tube 2 is made of aluminum or aluminum alloy, resulting in a good surface gloss and excellent corrosion resistance. The wall thickness of the outer tube 2 is 0.5~3mm. In other embodiments of this invention, the outer tube 2 may also be coated with other functional coatings, such as wear-resistant coatings or insulating coatings.
[0025] In this embodiment, the outer tube 2 is formed by covering the inner tube 1 of the substrate with aluminum material or aluminum alloy sheet, and the aluminum material or aluminum alloy sheet is welded to the two sides of the inner tube 1 of the substrate along the axial direction. The two sides of the aluminum material or aluminum alloy sheet are welded by laser welding, tungsten inert gas welding or gas metal arc welding. The aforementioned welding methods are existing technologies and will not be described in detail here.
[0026] like Figure 1As shown, in order to ensure that the inner tube 1 and outer tube 2 of the substrate are axially or radially positioned after the aluminum material or aluminum alloy sheet covers the inner tube 1, in this embodiment, an adhesive layer is provided between the inner tube 1 and the outer tube 2. The adhesive layer includes several adhesive points 3 of quick-drying adhesive material. Several recesses 4 are provided on the outer edge surface of the inner tube 1 of the substrate. The adhesive points 3 of quick-drying adhesive material are accommodated in the recesses 4 to position the adhesive points 3, so as to facilitate a firm bond between the inner tube 1 and the outer tube 2 of the substrate. In addition, the adhesive points 3 of quick-drying adhesive material avoid the two sides of the aluminum material or aluminum alloy sheet welded together.
[0027] Preparation process: First, prepare the inner tube 1 of the base material; Subsequently, several recesses 4 are formed on the outer edge surface of the inner tube 1 of the substrate, such as... Figure 2 As shown, this is existing technology and will not be described in detail here; Then, adhesive points 3 are embedded in the recesses 4; Then, aluminum material or aluminum alloy sheet is wrapped around the outer side of the inner tube 1 of the substrate, and the two sides of the aluminum material or aluminum alloy sheet are laser welded to form welds. Next, grind the weld seam to make it flush with the two sides of the outer tube.
[0028] Example 2 of multi-layer structure pipe The difference between Example 2 and Example 1 is that the inner tube 1 and outer tube 2 of the substitute substrate are fixedly connected by an adhesive layer, such as... Figure 3 As shown, foam material 5 is filled between the inner tube 1 and the outer tube 2 of the substrate to seal and connect them. Specifically, the inner tube 1 of the substrate is first prepared, and then one or more strips of foam material 5 are linearly coated on the outer edge surface of the inner tube 1, with the foam material avoiding the two side edges of the aluminum material or aluminum alloy sheet welded together, such as... Figure 4 As shown, in addition, several recesses 4 on the outer edge of the inner tube 1 of the substrate can increase the contact area with the foaming material 5, making the connection more reliable.
[0029] Example 3 of multi-layer structure pipe The difference between Example 3 and Example 1 is that the inner tube 1 and the outer tube 2 of the alternative substrate are fixedly connected by an adhesive layer. After thermal expansion, the outer tube 2 made of aluminum or aluminum alloy covers the outer tube 1 of the substrate, so that the cooled aluminum or aluminum alloy outer tube 2 is tightly fitted on the outer tube 1 of the substrate, which is convenient for processing.
[0030] like Figure 5 The multi-layer structure plate shown includes a plate-shaped substrate 11, and an outer layer plate 21 is fixedly wrapped around the plate-shaped substrate 11. The outer layer plate 21 is made of aluminum or aluminum alloy. The wall thickness of the outer layer plate 21 is 0.5~3mm. In this embodiment, the plate-shaped substrate 11 has a straight cross-section. In other embodiments of this utility model, the plate-shaped substrate 11 has a right-angled, C-shaped, U-shaped, or I-shaped cross-section, and can be a standard or non-standard profile. The plate-shaped substrate 11 is a galvanized steel pipe or a carbon steel pipe.
[0031] The aluminum or aluminum alloy sheet is formed by welding along the two side edges extending axially along the plate-shaped substrate 11. The two side edges of the aluminum or aluminum alloy sheet are welded using laser welding, tungsten inert gas welding, or gas metal arc welding, so that the aluminum or aluminum alloy sheet completely covers the plate-shaped substrate 11. The aforementioned welding method is prior art and will not be described in detail here.
[0032] In other embodiments of this utility model, the outer layer 21 may not completely cover the plate-shaped substrate 11, such as... Figure 6 As shown, the outer layer 21 formed by aluminum material or aluminum alloy sheet is attached to the top surface of the plate-shaped substrate 11, and the two axially extending sides of the aluminum material or aluminum alloy sheet are welded or bonded to the plate-shaped substrate 11.
[0033] like Figure 5 As shown, in order to ensure that the plate-shaped substrate 11 and the outer layer plate 21 are axially or radially positioned after the aluminum material or aluminum alloy sheet completely or partially covers the plate-shaped substrate 11, in this embodiment, an adhesive layer is provided between the plate-shaped substrate 11 and the outer layer plate 21. The adhesive layer includes several adhesive points 3 made of quick-drying adhesive material. Several recesses 4 are provided on the outer edge surface of the outer layer plate 21. The adhesive points 3 made of quick-drying adhesive material are accommodated in the recesses 4 to position the adhesive points 3, so as to facilitate and firmly bond the plate-shaped substrate 11 and the outer layer plate 21. In addition, the adhesive points 3 made of quick-drying adhesive material avoid the two sides of the welded aluminum material or aluminum alloy sheet.
[0034] In other embodiments of this utility model, the alternative plate-shaped substrate 11 and the outer layer 21 are fixedly connected by an adhesive layer, and a foaming material 5 is filled between the plate-shaped substrate 11 and the outer layer 21 to seal the connection between the plate-shaped substrate 11 and the outer layer 21. Specifically, the plate-shaped substrate 11 is first prepared, and then one or more strips of foaming material 5 are linearly coated on the outer edge surface of the plate-shaped substrate 11, with the foaming material avoiding the two side edges of the aluminum material or aluminum alloy sheet welded together. In addition, several recesses 4 on the outer edge surface of the plate-shaped substrate 11 can increase the contact area with the foaming material 5, making the connection more reliable.
[0035] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.
Claims
1. A multi-layered pipe, characterized in that, It includes a substrate inner tube (1), and an outer tube (2) is fixedly sleeved on the outer side of the substrate inner tube (1). The outer tube (2) is made of aluminum or aluminum alloy. The outer tube (2) is formed by covering the inner tube (1) of the substrate with aluminum or aluminum alloy sheet and welding the two sides of the aluminum or aluminum alloy sheet extending axially along the inner tube (1). The outer edge of the inner tube (1) of the substrate is provided with several recesses (4). After thermal expansion, the outer tube (2) covers the outer tube (1) of the substrate, so that the cooled outer tube (2) is tightly fitted on the outer tube (1) of the substrate.
2. The multi-layered pipe according to claim 1, characterized in that, The two sides of the aluminum material or aluminum alloy sheet are welded by laser welding, tungsten inert gas welding or gas metal arc welding.
3. The multi-layer structure pipe according to claim 1 or 2, characterized in that, The inner tube (1) of the substrate is a galvanized steel pipe or a carbon steel pipe.
4. The multi-layer structure pipe according to claim 3, characterized in that, An adhesive layer is provided between the inner tube (1) and the outer tube (2) of the substrate to bond the inner tube (1) and the outer tube (2).
5. The multi-layer structure pipe according to claim 4, characterized in that, The adhesive layer includes adhesive points (3), and the adhesive points are made of quick-drying adhesive.
6. The multi-layered pipe according to claim 3, characterized in that, Foaming material (5) is filled between the inner tube (1) and the outer tube (2) of the substrate to seal the connection between the inner tube (1) and the outer tube (2).
7. The multi-layered pipe according to claim 5 or 6, characterized in that, The recess (4) is used to accommodate several bonding points (3) forming the adhesive layer, or to increase the contact area with the foaming material.
8. The multi-layered pipe according to claim 7, characterized in that, The wall thickness of the outer tube (2) is 0.5~3mm.
9. A multi-layer structural board, characterized in that, It includes a plate-shaped substrate (11), and an outer layer plate (21) is fixedly covered on the plate-shaped substrate. The outer layer plate (21) is made of aluminum or aluminum alloy. The outer layer (21) may completely cover the plate-shaped substrate (11) or not completely cover the plate-shaped substrate (11). The outer layer (21) is formed from aluminum or aluminum alloy sheet. Several recesses (4) on the outer edge surface of the plate-shaped substrate (11).
10. The multi-layer structural plate according to claim 9, characterized in that, An adhesive layer is provided between the plate-shaped substrate (11) and the outer layer plate (21) to bond the plate-shaped substrate (11) and the outer layer plate (21).
11. The multi-layer structural plate according to claim 9, characterized in that, The cross-section of the plate-shaped substrate is in the shape of a straight line, a right angle, a C-shape, a U-shape, or an I-shape.