A high-strength multi-metal composite steel pipe

Abstract

This utility model relates to the field of composite steel pipe technology and discloses a high-strength multi-metal composite steel pipe, comprising: an inner steel pipe, which is a cylindrical shape with a smooth inner wall and a corrugated outer wall; an outer protective pipe, which is a square tube located outside the inner steel pipe and has a cylindrical cavity coaxial with the inner steel pipe, and its inner wall is corrugated; a transition layer, which is located between the inner steel pipe and the outer protective pipe and is tightly fitted to both the inner steel pipe and the outer protective pipe, and whose inner and outer walls are corrugated to match the outer walls of the inner steel pipe and the inner walls of the outer protective pipe, respectively; and a reinforcing component, including reinforcing ribs and reinforcing mesh, wherein the reinforcing ribs are welded to the edges of the outer wall of the outer protective pipe, and the reinforcing mesh is welded to the side wall of the outer protective pipe. The advantages of this utility model are: good stability of the transition layer, ease of installation of the square tube outer wall, and strong tensile and compressive strength.

Description

Technical Field

[0001] This utility model relates to the field of composite steel pipe technology, specifically to a high-strength multi-metal composite steel pipe. Background Technology

[0002] With the increasing demands for pipeline performance in the industrial sector, traditional single-material steel pipes can no longer meet the needs of complex working conditions, leading to the development of multi-metal composite steel pipes. By combining metals with different properties, these pipes possess multiple advantages, such as corrosion resistance, high strength, and wear resistance, and are widely used in petroleum, chemical, and energy transportation industries. Early composite steel pipes primarily employed simple physical bonding methods; however, with technological advancements, they have gradually shifted towards more advanced processes such as metallurgical bonding, aiming to improve the composite effect and overall performance.

[0003] In the field of modern industrial pipeline applications, multi-metal composite steel pipes occupy an important position due to their comprehensive performance advantages. However, there are still some technical bottlenecks that need to be addressed: First, the transition layer between different metals is prone to delamination due to differences in thermal expansion coefficients and insufficient interfacial bonding, leading to pipe structural failure. Second, the traditional circular outer wall design has poor adaptability in narrow spaces or irregular installation environments, resulting in low installation efficiency and high operational difficulty. Third, limited by material ratios and process levels, the wear resistance and tensile strength of some multi-metal composite steel pipes cannot meet the stringent requirements of high-velocity scouring and heavy-load pressure, shortening the service life of the pipeline and increasing maintenance costs and safety hazards. Utility Model Content

[0004] To solve the above-mentioned problems, this utility model proposes a high-strength multi-metal composite steel pipe with good transition layer stability, easy installation of the outer square tube, and strong tensile and compressive strength.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is: a high-strength multi-metal composite steel pipe, comprising:

[0006] The inner steel pipe is a cylindrical shape with a smooth inner wall and a wavy outer wall;

[0007] The outer protective tube is a square tube located outside the inner steel tube. Inside it is a cylindrical cavity coaxial with the inner steel tube, and the inner wall is corrugated.

[0008] The transition layer is located between the inner steel pipe and the outer protective pipe, and is tightly fitted to both the inner steel pipe and the outer protective pipe. Its inner and outer walls are corrugated to match the outer wall of the inner steel pipe and the inner wall of the outer protective pipe, respectively.

[0009] The reinforcement component includes a reinforcing rib and a reinforcing mesh. The reinforcing rib is welded to the edge of the outer wall of the outer protective pipe, and the reinforcing mesh is welded to the side wall of the outer protective pipe.

[0010] Furthermore, the inner steel pipe is made of stainless steel, and its inner wall is coated with a nano-level anti-corrosion coating.

[0011] Furthermore, the outer protective tube is made of wear-resistant cast iron.

[0012] Furthermore, the transition layer is made of copper alloy.

[0013] Furthermore, the reinforcing mesh is composed of several equidistant and intersecting V-shaped convex strips, both sides of which are welded to the reinforcing ribs.

[0014] Compared with the prior art, the advantages of this utility model are as follows: the transition layer is made of copper alloy and the inner and outer walls are wavy, which can tightly fit the inner steel pipe and the outer protective pipe. The good ductility and connectivity of copper alloy can effectively buffer the stress between the inner and outer layers. At the same time, the wavy structure increases the contact area, further improving the stability of the transition layer and ensuring that the layers are not prone to displacement or separation.

[0015] The square tube on the outer wall is easy to install. Compared with the round tube, the square structure is easier to position and fix during installation, can better fit the installation environment, is not easy to roll, and improves the convenience and accuracy of installation.

[0016] The inner stainless steel pipe provides basic strength and toughness, while the outer wear-resistant cast iron protective pipe effectively resists external pressure and tension. The reinforcing ribs and the reinforcing mesh composed of V-shaped convex bars further enhance the structural strength of the outer wall, enabling the composite steel pipe to effectively disperse stress when subjected to external forces, making it less prone to deformation or damage. Overall, it has excellent tensile and compressive strength. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is the front view of this utility model;

[0019] Figure 3 This is a cross-sectional view of the present invention excluding the reinforcing component portion;

[0020] Figure 4 This is a schematic diagram of the inner steel pipe part of this utility model.

[0021] As shown in the figure: 1. Inner steel pipe; 2. Outer protective pipe; 3. Transition layer; 4. Reinforcing ribs; 5. Reinforcing mesh; 6. Nanoscale anti-corrosion coating. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Combined with appendix Figure 3 Appendix Figure 4 A high-strength multi-metal composite steel pipe includes: an inner steel pipe 1, which is a cylindrical shape with a smooth inner wall and a corrugated outer wall. The inner steel pipe 1 is made of stainless steel and has a nano-level anti-corrosion coating 6 on its inner wall. The stainless steel material ensures the strength and corrosion resistance of the inner steel pipe 1, and the nano-level anti-corrosion coating 6 further enhances the anti-corrosion performance of its inner wall and extends the service life of the composite steel pipe.

[0024] Combined with appendix Figure 1 Appendix Figure 3 The outer protective tube 2 is a square tube located outside the inner steel tube 1. It has a cylindrical cavity coaxial with the inner steel tube 1 inside and the inner wall is corrugated. The outer protective tube 2 is made of wear-resistant cast iron, which gives it good wear resistance and can effectively resist external friction and impact, providing reliable external protection for the inner steel tube 1 and enhancing the overall protective capability of the composite steel pipe.

[0025] Combined with appendix Figure 3 The transition layer 3 is located between the inner steel pipe 1 and the outer protective pipe 2, and is tightly fitted to both the inner steel pipe 1 and the outer protective pipe 2. Its inner and outer walls are corrugated to match the outer wall of the inner steel pipe 1 and the inner wall of the outer protective pipe 2, respectively. The transition layer 3 is made of copper alloy, which has good ductility and connectivity, and can tightly fit the inner steel pipe 1 and the outer protective pipe 2. This not only enhances the bonding strength between the layers of the composite steel pipe, but also buffers the stress between the inner and outer layers to a certain extent.

[0026] Combined with appendix Figure 1 Appendix Figure 2 The reinforcing components include reinforcing ribs 4 and reinforcing mesh 5. The reinforcing ribs 4 are welded to the edges of the outer wall of the outer protective pipe 2, and the reinforcing mesh 5 is welded to the side wall of the outer protective pipe 2. The reinforcing mesh 5 consists of several equidistant and intersecting V-shaped convex strips, both sides of which are welded to the reinforcing ribs 4, so that the reinforcing mesh 5 and the reinforcing ribs 4 form a stable whole, enhancing the compressive and deformation resistance of the outer protective pipe 2 and improving the overall strength of the composite steel pipe.

[0027] The specific implementation method of this utility model is as follows: First, installation is carried out. Because the outer protective tube 2 is square-shaped, it is easy to position and fix, does not easily roll, and can be quickly and accurately placed in the installation position, greatly improving installation efficiency. When using the composite steel pipe, the reinforcing ribs 4 at the outer wall edges of the outer protective tube 2 and the reinforcing mesh 5 on the side walls enhance the overall structural strength, making the connection more stable.

[0028] In actual media transportation, the inner steel pipe 1 plays a crucial role. Its smooth inner wall reduces resistance during media transportation, improves transportation efficiency, and the stainless steel material and nano-level anti-corrosion coating 6 on the inner wall effectively prevent corrosion by the media, extending its service life. Simultaneously, the pressure generated during media transportation is transmitted to the transition layer 3 through the inner steel pipe 1. The copper alloy material and corrugated inner and outer walls of the transition layer 3 allow it to fit tightly against the inner and outer layers, buffering stress and ensuring the stability of each layer. The outer protective pipe 2 resists external friction, impact, and pressure; its wear-resistant cast iron material provides excellent protective performance, ensuring the composite steel pipe can operate safely and stably even in complex environments.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; for those skilled in the art, the specific meaning of the above term in this utility model can be understood according to the specific circumstances.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-strength multi-metal composite steel pipe, characterized by, include: The inner steel pipe (1) is a cylindrical shape with a smooth inner wall and a wavy outer wall; The outer protective tube (2) is a square tube and is located outside the inner steel tube (1). Inside it is a cylindrical cavity coaxial with the inner steel tube (1) and the inner wall is wavy. The transition layer (3) is located between the inner steel pipe (1) and the outer protective pipe (2) and is tightly fitted to the inner steel pipe (1) and the outer protective pipe (2). Its inner and outer walls are corrugated to match the outer wall of the inner steel pipe (1) and the inner wall of the outer protective pipe (2), respectively. The reinforcement component includes a reinforcing rib (4) and a reinforcing mesh (5). The reinforcing rib (4) is welded to the edge of the outer wall of the outer protective pipe (2), and the reinforcing mesh (5) is welded to the side wall of the outer protective pipe (2).

2. The high-strength multi-metal composite steel pipe according to claim 1, characterized in that: The inner steel pipe (1) is made of stainless steel and has a nano-level anti-corrosion coating (6) on its inner wall.

3. The high-strength multi-metal composite steel pipe according to claim 1, characterized in that: The outer protective tube (2) is made of wear-resistant cast iron.

4. The high-strength multi-metal composite steel pipe according to claim 1, characterized in that: The transition layer (3) is made of copper alloy.

5. A high-strength multi-metal composite steel pipe according to claim 1, characterized in that: The reinforcing mesh (5) is composed of several equidistant and intersecting V-shaped convex strips, both sides of which are welded to the reinforcing ribs (4).

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