Special-shaped copper pipe

Abstract

The utility model provides a special-shaped copper pipe relates to fluid delivery field, including hollow pipe body, the cross section outer contour of hollow pipe body is formed by two equal diameter circular part intersection, be equipped with the spiral groove of helical extension along its axis on the outer wall of hollow pipe body. The present application passes through its unique double circular cross section outer contour, has significantly increased the heat exchange area under the same material consumption. The spiral groove on the outer wall further strengthens the disturbance of the pipe outer flow field, effectively breaks through the thermal boundary layer, induces the generation of turbulent flow, thereby significantly improves the heat exchange efficiency. The structure optimizes the spoiler form, realizes the heat transfer enhancement while compared with the prior art special-shaped tube can control the increase of flow resistance more, realizes the optimization promotion of energy efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fluid transportation, and in particular to an irregularly shaped copper pipe. Background Technology

[0002] Copper tubes, as important conductive elements, are widely used in fluid transport systems such as refrigeration, heating, and hydraulic systems. To meet different heat transfer and mechanical performance requirements, various irregularly shaped cross-section tubes have gradually evolved from basic circular cross-section copper tubes. These irregularly shaped tubes aim to improve the overall efficiency of the system by changing the fluid flow state or increasing the heat exchange area. This invention relates to an irregularly shaped copper tube with a specific cross-sectional shape and an external helical structure.

[0003] In existing technologies, a common approach to enhance heat transfer is to use non-circular cross-section shaped copper tubes, such as elliptical, flat, or polygonal tubes. These tube shapes disrupt the laminar boundary layer of the fluid by altering the flow channel shape, thereby achieving a certain degree of enhanced heat transfer. However, while these existing shaped tubes enhance heat transfer, they often come with a significant increase in flow resistance, resulting in limited energy efficiency improvements. Some structures also employ relatively simple perturbation methods for fluid flow, failing to fully achieve turbulence enhancement. Therefore, we propose a shaped copper tube. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by significantly increasing the heat transfer area with the same amount of material through its unique double-circular cross-section outer contour. The spiral grooves on the outer wall further enhance the disturbance of the external flow field, effectively breaking through the thermal boundary layer and inducing turbulence, thereby significantly improving heat transfer efficiency. This structure optimizes the turbulence pattern, achieving enhanced heat transfer while better controlling the increase in flow resistance compared to existing irregularly shaped tubes, thus optimizing energy efficiency.

[0005] To solve the above-mentioned technical problems, this utility model solves the problems of high flow resistance and insufficient turbulence enhancement in traditional irregularly shaped copper tubes through the following technical solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An irregularly shaped copper tube includes a hollow tube body. The outer contour of the cross-section of the hollow tube body is formed by the intersection of two circular portions of equal diameter. The outer wall of the hollow tube body is provided with a spiral groove extending spirally along its axis.

[0007] Preferably, the cross-sectional shape of the spiral groove is arc-shaped.

[0008] Preferably, the inner wall of the hollow tube is provided with an inwardly protruding spiral guide rib, and the spiral direction of the spiral guide rib is the same as or opposite to the spiral groove on the outer wall.

[0009] Preferably, the hollow tube has connecting parts at both ends for connecting with matching tube segments.

[0010] Preferably, the connecting part is a radially recessed socket, and the socket is fitted with a matching connector. The other end of the connector is a cylindrical structure used to connect a straight pipe section.

[0011] Preferably, the inner wall of the socket and / or the end of the joint are provided with a sealing structure.

[0012] Preferably, the connecting part and the joint are fixed by brazing or welding.

[0013] Preferably, the connecting part is a radially outward-expanding socket, and the inner diameter of the socket is configured to directly accommodate the end of another hollow tube.

[0014] Preferably, the inner wall of the socket is provided with a second sealing structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The irregularly shaped copper tube provided in this application significantly increases the heat transfer area with the same amount of material through its unique double-circular cross-section outer contour. The spiral grooves on the outer wall further enhance the disturbance of the flow field outside the tube, effectively breaking through the thermal boundary layer and inducing turbulence, thereby significantly improving heat transfer efficiency. This structure optimizes the turbulence form, and while achieving enhanced heat transfer, it can better control the increase in flow resistance compared to existing irregularly shaped tubes, thus achieving optimized energy efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a top view cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the disassembled structure of Embodiment 2 of this utility model.

[0018] Drawing number explanation: 1. Hollow tube body; 11. Connecting part; 2. Spiral groove; 3. Sealing structure one; 31. Sealing structure two; 4. Spiral guide rib; 5. Joint. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0021] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0022] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0023] Please see Figure 1-5 A non-circular copper tube includes a hollow tube body 1. The outer contour of the cross-section of the hollow tube body 1 is formed by the intersection of two circular parts of equal diameter. The outer wall of the hollow tube body 1 is provided with a spiral groove 2 extending spirally along its axis.

[0024] The irregularly shaped copper tube of this application is mainly composed of a hollow tube body 1. This hollow tube body 1 is preferably made of copper or a copper alloy, which has good thermal conductivity. The outer contour of the cross-section of the hollow tube body 1 is formed by the intersection of two circular sections of equal diameter, resembling a double-circular or spectacle-shaped cross-section. This specific shape, while ensuring structural strength, increases its outer surface area compared to traditional circular tubes, providing a basis for enhanced heat exchange with the external medium.

[0025] On the outer wall of the hollow tube 1, a spiral groove 2 extending helically along its axis is machined. The cross-sectional shape of the spiral groove 2 is preferably arc-shaped, such as a circular arc. This shape can effectively reduce stress concentration and improve the fatigue strength of the tube. The presence of the spiral groove 2 not only further increases the outer surface area of ​​the tube, but more importantly, when an external fluid, such as air, flows through the outside of the tube, the spiral structure can effectively disturb the flow field, destroy the thermal boundary layer, and induce secondary flow or even turbulence, thereby significantly enhancing heat transfer outside the tube.

[0026] To optimize the flow state of the internal fluid, inwardly protruding spiral guide ribs 4 are provided on the inner wall of the hollow tube 1. The spiral direction of the spiral guide ribs 4 can be the same as or opposite to the spiral direction of the spiral grooves 2 on the outer wall. When the spiral directions are the same, the inner and outer spiral structures may produce a synergistic effect, guiding the fluid as a whole in a spiral motion, lengthening the flow channel, and enhancing turbulence. When the spiral directions are opposite, more complex vortices may be generated, which is more effective in disrupting the internal thermal boundary layer. While turbulenting the fluid, the spiral guide ribs 4 also act as reinforcing ribs, improving the structural rigidity of the tube.

[0027] Connecting portions 11 are provided at both ends of the hollow tube 1. In this embodiment, the connecting portion 11 is a radially recessed socket structure. During installation, a matching connector 5 is fitted onto the outside of the socket. The other end of the connector 5 is usually a standard-sized circular tube structure, which facilitates connection with other straight pipe sections or components in the system. To ensure the sealing of the connection, a sealing structure 3 can be provided on the inner wall of the socket and / or the end of the connector 5, such as embedding an O-ring or applying sealant. Finally, the connecting portion 11 and the connector 5 are permanently fixed by brazing or welding to ensure a firm and leak-free connection.

[0028] In another embodiment, the connecting portion 11 at one end of the hollow tube 1 is constructed as a radially outward-expanding socket. The inner diameter of this socket is precisely designed so that it can directly accommodate another non-connecting portion 11 of the same specification, i.e., the end of another hollow tube 1, thus achieving a direct connection between the pipe sections. This design simplifies the connection while reducing assembly complexity and cost.

[0029] Similarly, to ensure the sealing performance of the connection, a sealing structure 31 is provided on the inner wall of the radially flared socket. For example, an annular groove can be formed and a sealing ring can be placed there. After the two pipes are inserted into place, the sealing structure 31 can effectively prevent fluid leakage. If necessary, the socket joint can also be reinforced by brazing or welding.

[0030] Working principle The double-circular cross-section of the hollow tube 1 has a larger specific surface area compared to a circular tube. The spiral grooves 2 on the outer wall further increase the heat exchange area and act as the main flow-disrupting element. When external fluids, such as air, flow laterally across the tube, the spiral grooves 2 guide the fluid to generate a spiral motion along the channels, strongly disturbing the originally stable laminar boundary layer near the tube wall. By optimizing the flow field disturbance, the spiral grooves 2 effectively disrupt the thermal boundary layer while helping to control excessive increases in flow resistance. For the fluid inside the tube, the spiral guide ribs 4 on the inner wall force the fluid to rotate, forming a secondary flow and achieving intense mixing and heat exchange within the fluid. Ultimately, this design, combining internal and external improvements, achieves a significant increase in heat exchange at a relatively low pressure drop cost, optimizing overall energy efficiency.

[0031] For the fluid flowing inside the pipe, the spiral guide ribs 4 on the inner wall play a crucial role. They force the fluid to rotate while flowing axially, creating a circumferential velocity component and forming a strong secondary flow. This secondary flow continuously sweeps the hotter fluid from the pipe center towards the pipe wall, while simultaneously carrying the cooled fluid near the wall towards the center, achieving intense mixing and heat exchange within the fluid. This effectively disrupts the internal thermal boundary layer, significantly enhancing heat transfer within the pipe. Although the spiral guide ribs 4 increase flow resistance to some extent, their rational design and the heat transfer gain resulting from their synergistic effect with the external spiral grooves 2 far outweigh the resistance loss, resulting in improved overall energy efficiency.

[0032] The external spiral grooves 2 and the internal spiral guide ribs 4 work together, regardless of whether the spiral directions are the same or opposite, to create a complex enhanced heat transfer mechanism in both the radial and axial directions of the tube. This design, which combines internal and external improvements, enables this irregularly shaped copper tube to achieve a significant improvement in heat exchange performance with a relatively small pressure drop in heat exchanger applications such as refrigeration and heating.

[0033] In summary, by organically combining a specific cross-sectional shape with an inner and outer spiral structure, a solution for irregularly shaped copper tubes with high heat exchange efficiency and excellent overall performance is provided.

[0034] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A shaped copper tube, characterized in that, It includes a hollow tube (1), the outer contour of the cross section of the hollow tube (1) is formed by the intersection of two circular parts of equal diameter, and the outer wall of the hollow tube (1) is provided with a spiral groove (2) extending spirally along its axis.

2. The irregularly shaped copper tube according to claim 1, characterized in that: The cross-sectional shape of the spiral groove (2) is arc-shaped.

3. The irregularly shaped copper tube according to claim 1, characterized in that: The inner wall of the hollow tube (1) is provided with an inwardly protruding spiral guide rib (4), and the spiral direction of the spiral guide rib (4) is the same as or opposite to the spiral groove (2) on the outer wall.

4. The irregularly shaped copper tube according to claim 1, characterized in that: The hollow tube (1) is provided with connecting parts (11) at both ends for connecting with matching pipe sections.

5. The irregularly shaped copper tube according to claim 4, characterized in that: The connecting part (11) is a radially recessed socket, and the socket is fitted with a matching connector (5). The other end of the connector (5) is a cylindrical structure used to connect a straight pipe section.

6. The irregularly shaped copper tube according to claim 5, characterized in that: The inner wall of the socket and / or the end of the joint (5) are provided with a sealing structure (3).

7. The irregularly shaped copper tube according to claim 5, characterized in that: The connecting part (11) and the joint (5) are fixed together by brazing or welding.

8. The irregularly shaped copper tube according to claim 4, characterized in that: The connecting part (11) is a radially outward-expanding socket, and the inner diameter of the socket is configured to directly accept the end of another hollow tube (1).

9. A shaped copper tube according to claim 8, characterized in that: The inner wall of the socket is provided with a sealing structure two (31).

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