A composite pipe

Abstract

The utility model belongs to the technical field of composite pipes, and specifically relates to a composite pipe. It comprises a core pipe and an outer pipe, wherein the core pipe is arranged inside the outer pipe, the core pipe is made of a first material, and the outer pipe is made of a second material; the first material comprises at least one metal of titanium, nickel or titanium-nickel alloy, and the second material is copper. The purpose is to make the pipe have both extremely high corrosion resistance and high thermal conductivity by respectively setting the core pipe and the outer pipe as composite pipes with strong corrosion resistance and good thermal conductivity.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite pipes, and in particular relates to a composite pipe. Background Art

[0002] With the continuous development of industries such as aerospace, marine engineering, energy and electricity, and petrochemicals, it is becoming increasingly difficult for materials to meet actual use requirements in terms of performance. For example, in many scenarios, pipelines are required to have both extremely high corrosion resistance and high thermal conductivity. Existing pipes can only meet a single performance requirement. For example, metal pipes such as titanium and nickel can meet corrosion resistance, but have poor thermal conductivity.

[0003] Moreover, in scenarios where multiple pipes need to be connected, existing pipe connections are generally made by workers directly aligning two pipes and hot-melt welding, which makes it difficult to align the welding surfaces and the air tightness of the welding points is poor. Utility Model Content

[0004] The purpose of the utility model is to provide a composite pipe to solve one of the above problems, that is, the existing pipe material cannot have both extremely high corrosion resistance and high thermal conductivity.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A composite tube comprises a core tube and an outer tube, wherein the core tube is arranged inside the outer tube, the core tube is made of a first material, and the outer tube is made of a second material;

[0007] The first material includes at least one metal of titanium, nickel or titanium-nickel alloy, and the second material is copper. In this way, by setting the core tube and the outer tube as composite tubes with good thermal conductivity and strong corrosion resistance, the tube material has both extremely high corrosion resistance and high thermal conductivity efficiency.

[0008] Preferably, the outer wall of the outer tube is provided with first heat dissipation thread teeth, and the inner wall of the core tube is provided with second heat dissipation thread teeth. Such an arrangement is conducive to improving heat dissipation efficiency.

[0009] Preferably, the outer diameter of the core tube is 5 mm-80 mm, the wall thickness of the core tube is 0.5 mm-5 mm, and the outer diameter of the outer tube is 6 mm-90 mm. This arrangement is conducive to processing.

[0010] Preferably, it further comprises a connection structure, wherein the composite tube comprises a first end and a second end, and the connection structure comprises a connection sleeve, wherein the connection sleeve is fixedly connected to the first end, and the outer tube extends outwardly at the second end;

[0011] The connecting sleeve includes an end cap and an inner tube sleeve, the end cap and the inner tube sleeve are coaxially arranged, the inner tube sleeve is sleeved on the core tube, the end cap is provided with a mounting groove, the inner tube sleeve is located in the mounting groove, the inner wall of the mounting groove is provided with a first internal thread, the outer tube at the second end is provided with a first external thread, and the first internal thread is connected to the first external thread. This arrangement makes it easy to connect adjacent composite pipes through the connecting sleeve, and is convenient for installation when practical.

[0012] Preferably, the front end of the inner tube sleeve is fixedly connected with a connecting tube, the connecting tube is provided with a second external thread, the end surface of the inner tube at the second end is provided with a connecting hole, the inner wall of the connecting hole is provided with a second internal thread, and the second external thread is connected to the second internal thread. This arrangement is conducive to further strengthening the connection between the connecting sleeve and the inner tube through the connecting tube, thereby improving the connection effect.

[0013] Preferably, a sealing ring is arranged between the installation groove and the second end head, which is conducive to improving the sealing effect of the connection and adapting to the working environment requiring high air tightness.

[0014] Preferably, the end cap and the inner pipe sleeve are integrally formed, and a grid structure is arranged inside the end cap and the inner pipe sleeve, which is conducive to improving the heat dissipation effect at the connection between two adjacent composite pipes.

[0015] The utility model adopting the above technical solution has the following advantages:

[0016] 1. In this scheme, by setting the core tube and the outer tube as composite tubes with good thermal conductivity and strong corrosion resistance respectively, the tube material has both extremely high corrosion resistance and high thermal conductivity efficiency;

[0017] 2. In this solution, heat dissipation thread teeth are provided on the outer wall of the outer tube, thereby improving the heat dissipation efficiency of the composite tube;

[0018] 3. In this solution, a connecting sleeve is provided on the first end of the composite pipe. During installation, alignment can be achieved by simply connecting the first end of two adjacent pipes with the second end through the connecting sleeve. The first internal thread and the first external thread are threadedly connected and the sealing ring is used to improve the air tightness of the connection. Only the connection position of the connecting sleeve and the second end needs to be hot-melt welded, which is simple and convenient to operate.

[0019] 4. In this solution, a grid structure is provided in the end cover of the connecting sleeve and the inner pipe sleeve, which is beneficial to improve the heat dissipation effect at the connection between two adjacent composite pipes and reduce the influence of welding between two adjacent pipes on the heat conduction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0021] Figure 1 This is one of the structural schematic diagrams of a composite pipe embodiment of the utility model;

[0022] Figure 2 This is the second structural schematic diagram of a composite pipe embodiment of the utility model;

[0023] Figure 3 This is a structural schematic diagram of two adjacent composite pipes connected to each other in one embodiment of a composite pipe of the utility model;

[0024] Figure 4 This is a structural schematic diagram of a connecting sleeve of a composite pipe embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of a connecting sleeve of a composite pipe embodiment of the utility model;

[0026] The main component symbols are described as follows:

[0027] 1. Core tube; 2. Outer tube; 21. Heat dissipation thread teeth; 22. Second end; 221. First external thread; 3. Connecting sleeve; 31. End cover; 311. First internal thread; 32. Inner tube sleeve; 4. Connecting tube; 41. Second external thread; 5. Sealing ring; 6. Grid structure. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0029] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] like Figure 1 to Figure 5 As shown, a composite tube of the utility model comprises a core tube 1 and an outer tube 2, wherein the core tube 1 is arranged inside the outer tube 2, the core tube 1 is made of a first material, and the outer tube 2 is made of a second material;

[0031] The first material includes at least one metal of titanium, nickel or titanium-nickel alloy, and the second material is copper.

[0032] In this embodiment, the outer tube 2 can be copper with high thermal conductivity, and the core tube 1 can be one or more metals of titanium, nickel or titanium-nickel alloy with extremely high corrosion resistance. For example, the core tube 1 can be a titanium tube, a nickel tube, or a titanium-nickel alloy tube. By setting the core tube 1 and the outer tube 2 as composite tubes with strong corrosion resistance and good thermal conductivity, the tube material has both extremely high corrosion resistance and high thermal conductivity.

[0033] In this embodiment, the outer diameter of the core tube 1 can be 5mm-10mm, and the wall thickness of the core tube 1 can be 0.5mm-5mm, and the outer diameter of the outer tube 2 can be 6mm-90mm. For example, the outer diameter of the core tube 1 is preferably 8mm, and the wall thickness of the core tube 1 is preferably 1mm. At this time, the outer diameter of the outer tube 2 matched therewith is 20mm, and the wall thickness is 6mm, which is convenient for processing.

[0034] In this embodiment, the outer wall of the outer tube 2 is provided with a first heat dissipation thread tooth 21, which is conducive to improving the heat dissipation efficiency. At the same time, a second heat dissipation thread tooth can also be formed on the inner wall of the core tube 1 to increase the heat dissipation space inside the composite tube to improve the heat dissipation efficiency. It can be understood that an inclined groove can also be processed on the heat dissipation thread tooth 21 to further improve the heat dissipation efficiency.

[0035] In this embodiment, the composite tube may further include a connection structure, the composite tube includes a first end and a second end 22, the connection structure includes a connection sleeve 3, the connection sleeve 3 is fixed to the first end, and the outer tube 2 extends outward at the second end 22;

[0036] The connecting sleeve 3 includes an end cap 31 and an inner pipe sleeve 32, the end cap 31 and the inner pipe sleeve 32 are coaxially arranged, the inner pipe sleeve 32 is sleeved on the core pipe 1, the end cap 31 is provided with a mounting groove, the inner pipe sleeve 32 is located in the mounting groove, the inner wall of the mounting groove is provided with a first internal thread 311, the outer pipe 2 at the second end 22 is provided with a first external thread 221, and the first internal thread 311 is connected to the first external thread 221. By arranging the connecting sleeve 3 on the first end of the composite pipe, during installation, it is only necessary to connect the first ends of two adjacent pipes with the second ends 22 through the connecting sleeve 3 to achieve alignment, and installation is convenient.

[0037] In this embodiment, the front end of the inner tube sleeve 32 is fixedly connected with a connecting tube 4, the connecting tube 4 is provided with a second external thread 41, a connecting hole is provided on the end surface of the inner tube at the second end head 22, a second internal thread is provided on the inner wall of the connecting hole, and the second external thread 41 is connected to the second internal thread. The connection between the connecting sleeve 3 and the inner tube is further strengthened by the connecting tube 4, thereby improving the connection effect.

[0038] In this embodiment, a sealing ring 5 is provided between the installation groove and the second end head 22, which is beneficial to improving the sealing effect of the connection and adapting to the working environment requiring high air tightness.

[0039] In this embodiment, the end cap 31 and the inner pipe sleeve 32 are integrally formed, and a grid structure 6 is provided inside the end cap 31 and the inner pipe sleeve 32. This is beneficial to improving the heat dissipation effect at the connection between two adjacent composite pipes and reducing the influence of welding between two adjacent pipes on the heat conduction efficiency. It can be understood that the grid structure 6 can be a grid-type grid in this embodiment, or a rectangular grid or a triangular grid.

[0040] The processing process of the composite pipe of this application is:

[0041] S1: inserting the core tube 1 into the mold, with the outer wall of the core tube 1 spaced apart from the mold;

[0042] S2: The alloy liquid in the outer tube 2 is drained to the gap between the core tube 1 and the mold for filling;

[0043] S3: Cooling the outer tube 2 with water outside the mold so that the outer tube 2 is cooled outside the core tube 1 and attached to the core tube 1 to obtain a composite alloy tube;

[0044] S4: After rolling, the composite pipe is cold drawn to achieve a suitable wall thickness and outer diameter.

[0045] The above is a detailed introduction to a composite pipe provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A composite pipe, characterized in that: It comprises a core tube (1) and an outer tube (2), wherein the core tube (1) is arranged inside the outer tube (2), the core tube (1) is made of a first material, and the outer tube (2) is made of a second material; The first material includes a titanium-nickel alloy, and the second material includes copper.

2. A composite pipe according to claim 1, characterized in that: The outer wall of the outer tube (2) is provided with heat dissipation thread teeth (21).

3. A composite pipe according to claim 1, characterized in that: The outer diameter of the core tube (1) is 5 mm to 80 mm, the wall thickness of the core tube (1) is 1 mm to 5 mm, and the outer diameter of the outer tube (2) is 6 mm to 90 mm.

4. A composite pipe according to claim 1, characterized in that: It also comprises a connection structure, the composite pipe comprises a first end and a second end (22), the connection structure comprises a connection sleeve (3), the connection sleeve (3) is fixedly connected to the first end, and the outer pipe (2) extends outward at the second end (22); The connecting sleeve (3) comprises an end cover (31) and an inner tube sleeve (32), wherein the end cover (31) and the inner tube sleeve (32) are coaxially arranged, the inner tube sleeve (32) is sleeved on the core tube (1), the end cover (31) is provided with a mounting groove, the inner tube sleeve (32) is located in the mounting groove, a first internal thread (311) is provided on the inner wall of the mounting groove, a first external thread (221) is provided on the outer tube (2) at the second end head (22), and the first internal thread (311) is connected to the first external thread (221).

5. A composite pipe according to claim 4, characterized in that: The front end of the inner tube sleeve (32) is fixedly connected to a connecting tube (4), the connecting tube (4) is provided with a second external thread (41), a connecting hole is provided on the end surface of the inner tube at the second end head (22), a second internal thread is provided on the inner wall of the connecting hole, and the second external thread (41) is connected to the second internal thread.

6. A composite pipe according to claim 4, characterized in that: A sealing ring (5) is provided between the installation groove and the second end head (22).

7. A composite pipe according to claim 4, characterized in that: The end cover (31) and the inner tube sleeve (32) are integrally formed, and a grid structure (6) is provided inside both the end cover (31) and the inner tube sleeve (32).

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