A copper pipe with internal thread

Abstract

The utility model discloses a female thread copper pipe relates to industrial heat exchange technical field, including copper pipe, one end of copper pipe is copper pipe entrance, the other end of copper pipe is copper pipe export, and the copper pipe entrance and copper pipe export are the copper pipe middle section between, and the pitch of copper pipe entrance and copper pipe export is 2.0mm, and the pitch of copper pipe middle section is 1.2mm, and the big pitch of 2.0mm of copper pipe entrance and copper pipe export has reduced the flow resistance when fluid initial entry and final flow, has reduced the energy consumption of power equipment such as pump body, compressor of driving fluid flow, and the smooth transition of pitch from 2.0mm to 1.2mm has avoided the fluid separation and vortex flow caused by the pitch mutation, has further reduced the additional load of power equipment, has promoted the economy of system operation.

Description

Technical Field

[0001] This utility model relates to the field of industrial heat exchange technology, specifically to an internally threaded copper tube. Background Technology

[0002] Internally threaded copper pipe is a type of copper pipe with threads on its inner surface and a smooth outer surface. It is commonly used in air conditioning systems to quickly transfer refrigerant throughout the piping system, thereby improving cooling efficiency.

[0003] Existing internally threaded copper tubes, due to their uniform tooth pitch design, make it difficult to achieve optimal matching of flow resistance distribution. This not only leads to a significant increase in energy loss during fluid transport but also forces core system components to consume additional energy to maintain circulation, ultimately resulting in an increase in overall operating energy consumption and a decrease in energy efficiency. To address these issues, an internally threaded copper tube is proposed. Utility Model Content

[0004] In order to solve the above problems, the purpose of this utility model is to provide an internally threaded copper tube.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: it includes a copper tube, one end of which is the copper tube inlet, the other end of which is the copper tube outlet, and the section between the copper tube inlet and the copper tube outlet is the middle section of the copper tube. The pitch between the copper tube inlet and the copper tube outlet is 2.0 mm, and the pitch of the middle section of the copper tube is 1.2 mm.

[0006] Preferably, the pitch at the copper tube inlet and outlet is gradually transitioned to the pitch in the middle section of the copper tube.

[0007] Preferably, the inner wall of the copper tube is made of graphene, and the outer wall of the copper tube is coated with an anti-corrosion coating.

[0008] Preferably, the thickness of the copper tube wall is 0.3 mm.

[0009] Preferably, both ends of the inner cavity of the copper tube are provided with several tooth apex angles, and the tooth apex angle is 45°.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the large pitch of 2.0mm at the copper pipe inlet and outlet reduces the flow resistance when the fluid initially enters and finally flows out, reduces the energy consumption of power equipment such as pumps and compressors that drive the fluid flow, and the smooth transition of the pitch from 2.0mm to 1.2mm avoids fluid separation and eddies caused by sudden pitch changes, further reduces the extra load on power equipment, and improves the economic efficiency of system operation. Attached Figure Description

[0011] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of one side of the present invention.

[0013] In the diagram: 1. Copper pipe; 101. Copper pipe inlet; 102. Copper pipe outlet; 103. Middle section of copper pipe. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example: Figures 1-3 As shown, this utility model provides an internally threaded copper tube, including a copper tube 1. One end of the copper tube 1 is a copper tube inlet 101, and the other end is a copper tube outlet 102. The area between the copper tube inlet 101 and the copper tube outlet 102 is a copper tube intermediate section 103. The pitch of the copper tube inlet 101 and the copper tube outlet 102 is 2.0 mm, and the pitch of the copper tube intermediate section 103 is 1.2 mm. During operation, when the fluid enters the copper tube 1, the large pitch of 2.0 mm at the copper tube inlet 101 reduces the initial flow resistance and avoids turbulence surge and pressure loss caused by excessively dense threads. When the fluid passes through the copper tube intermediate section 103 with a pitch of 1.2 mm, the dense threads enhance the degree of turbulence and significantly improve the convective heat transfer coefficient.

[0016] refer to Figure 2 As shown, the pitch of the copper tube inlet 101 and the copper tube outlet 102 is gradually transitioned to the pitch of the middle section 103 of the copper tube; the pitch smoothly transitions from 2.0 mm to 1.2 mm, avoiding eddies and separation flow caused by abrupt changes, which is especially suitable for the phase change process of refrigerant in the evaporator and condenser, and optimizes the different flow characteristics of the gas phase and liquid phase.

[0017] refer to Figure 1As shown, the inner wall of copper tube 1 is made of graphene, and the outer wall of copper tube 1 is coated with an anti-corrosion coating. The thermal conductivity of graphene is much higher than that of copper, forming an efficient heat conduction channel, which reduces the thermal resistance of the tube wall. The hydrophobicity of graphene reduces the retention of liquid on the tube wall and reduces the liquid film thermal resistance during the condensation process. The chemical inertness and smooth surface of graphene inhibit the deposition of dirt. The anti-corrosion coating on the outer wall forms a physical barrier, reducing the corrosion rate to 1 / 10 of that of ordinary copper tube 1.

[0018] refer to Figure 1 As shown, the wall thickness of copper tube 1 is 0.3mm. The 0.3mm wall thickness of copper tube 1 reduces the heat conduction path by 36% compared to the 0.5mm wall thickness of traditional copper tube 1, reduces the thermal resistance by about 20%, and reduces the weight by 25%.

[0019] refer to Figure 2 As shown, both ends of the inner cavity of the copper tube (1) are provided with several tooth apex angles, with a tooth apex angle of 45°. During operation, compared with the standard tooth apex angle, the 45° angle causes the fluid separation point to move backward, reducing the eddy loss in the wake region. The tooth apex is sharper, enhancing the ability to disturb the boundary layer and increasing the turbulence intensity by 15%-20%. During the processing, the 45° angle reduces the risk of tooth apex collapse and improves the thread forming accuracy by about 15%.

[0020] Working principle: When fluid enters the copper pipe inlet, the 2.0mm large pitch design reduces initial flow resistance and prevents turbulence surges and pressure losses caused by excessively tight threads, allowing the fluid to smoothly enter the pipe. When the fluid flows to the middle section, the 1.2mm... The densely packed threads enhance turbulence, significantly improving the convective heat transfer coefficient and increasing heat exchange efficiency. The pitch at the inlet, outlet, and middle sections transitions smoothly from 2.0mm to 1.2mm, avoiding eddies and flow separation caused by abrupt pitch changes. This design is particularly suitable for the phase change process of refrigerant in the evaporator and condenser, adapting to the different flow characteristics of the gas and liquid phases. The graphene material on the inner wall of the copper tube plays a significant role; its thermal conductivity is much higher than copper, forming a highly efficient heat conduction channel and reducing the tube wall thermal resistance. Its hydrophobicity reduces liquid retention on the tube wall, lowering the liquid film thermal resistance during condensation. Its chemical inertness and smooth surface also inhibit fouling. The anti-corrosion coating on the outer wall forms a physical barrier, reducing the corrosion rate to 1 / 10 of that of ordinary copper tubes. The 0.3mm wall thickness is significantly better than the 0.5mm thickness of traditional copper tubes. It reduces the heat conduction path by 36%, lowers thermal resistance by about 20%, and reduces weight by 25%, making it easier for heat transfer and installation. The 45° tooth tip angle design moves the fluid separation point further back compared to the standard tooth tip angle, reducing eddy current losses in the wake region. The sharper tooth tip enhances the ability to disturb the boundary layer, increasing turbulence intensity by 15%-20%, improving heat transfer efficiency, and reducing the risk of tooth tip collapse during processing, improving thread forming accuracy and ensuring overall performance stability.

[0021] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A threaded copper tube, comprising a copper tube (1), characterized in that: One end of the copper tube (1) is the copper tube inlet (101), and the other end of the copper tube (1) is the copper tube outlet (102). The copper tube inlet (101) and the copper tube outlet (102) are connected by a copper tube middle section (103). The pitch between the copper tube inlet (101) and the copper tube outlet (102) is 2.0 mm, and the pitch of the copper tube middle section (103) is 1.2 mm.

2. The internally threaded copper tube as described in claim 1, characterized in that, The pitch of the copper tube inlet (101) and copper tube outlet (102) is gradually transitioned to the pitch of the copper tube middle section (103).

3. The internally threaded copper tube as described in claim 2, characterized in that, The inner wall of the copper tube (1) is made of graphene, and the outer wall of the copper tube (1) is coated with an anti-corrosion coating.

4. A threaded copper tube as described in claim 3, characterized in that, The thickness of the copper tube (1) wall is 0.3 mm.

5. A threaded copper tube as described in claim 1, characterized in that, The inner cavities of the copper tube (1) are provided with several tooth apex angles at both ends, and the tooth apex angle is 45°.

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