Annealing device for copper wire processing
By using nitrogen to isolate oxygen and employing precise circuit design in the annealing apparatus, the problem of copper wire oxidation was solved, enabling efficient annealing and quality control while reducing equipment maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO QRUNNING CABLE CO LTD
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-14
AI Technical Summary
In existing copper wire annealing equipment, trace amounts of oxygen remaining in the high-temperature steam cause copper wire oxidation, affecting quality and conductivity. At the same time, the aging of non-metallic parts of the equipment increases maintenance costs.
Nitrogen gas is used to cover the pipes outside the copper wire in the annealing apparatus to isolate oxygen. Combined with precise circuit design and detection system, key parameters in the annealing process are monitored to ensure a low-oxygen environment and efficient heating.
It effectively prevents copper wire oxidation, improves electrical conductivity, reduces equipment component aging, lowers maintenance costs, and ensures consistent copper wire quality and production efficiency.
Smart Images
Figure CN224119074U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of conductor production technology, specifically relating to an annealing device for copper wire processing. Background Technology
[0002] Cable conductors are made by drawing and annealing copper rods, followed by stranding. Annealing the copper wire improves its conductivity and reduces its hardness. Current technology uses high-temperature steam (such as water-sealed tubular annealing) to remove air, providing a relatively oxygen-isolated environment to prevent oxidation from contact with air. However, trace amounts of oxygen may remain in the steam, causing surface oxidation of the copper wire during annealing, resulting in a reddish appearance and affecting the quality and conductivity of the wire. High-temperature steam can also accelerate the aging and deformation of certain equipment components (such as rubber seals and bakelite insulated wheels), increasing maintenance costs. Utility Model Content
[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: to propose an annealing device for copper wire processing, which covers the outside of the copper wire between the first annealing wheel and the second annealing wheel with a pipe, and fills the pipe with nitrogen gas. The nitrogen gas is used to expel the air in the pipe and prevent the copper wire from oxidizing due to contact with air during the annealing process.
[0004] The technical solution adopted by this utility model to solve its technical problem is to propose an annealing device for copper wire processing, used to perform an annealing operation on copper wire that has been drawn, the annealing device comprising:
[0005] Control panel;
[0006] The operating table is equipped with a preheating wheel, a first annealing wheel, and a second annealing wheel, and copper wires are in contact with the preheating wheel, the first annealing wheel, and the second annealing wheel in sequence;
[0007] The preheating wheel, the first annealing wheel, and the copper wire between them are connected to a preheating circuit to preheat the copper wire; the first annealing wheel, the second annealing wheel, and the copper wire between them are connected to an annealing circuit to perform annealing operations on the copper wire.
[0008] The copper wire between the first annealing wheel and the second annealing wheel is covered with a pipe, which is filled with nitrogen gas to isolate oxygen.
[0009] In the annealing apparatus for copper wire processing described above, the length of the copper wire between the preheating wheel and the first annealing wheel is L1, and the length of the copper wire between the first annealing wheel and the second annealing wheel is L2; wherein, the voltages of the preheating circuit and the annealing circuit are equal, and L1 / L2≥10.
[0010] In the annealing apparatus for copper wire processing described above, a first detection element is also provided on the operating table, which is located at one end of the pipeline for detecting oxygen concentration.
[0011] In the annealing apparatus for copper wire processing described above, a second detection element is further provided on the side of the first detection element, and the second detection element is used to detect the nitrogen input flow rate.
[0012] In the annealing apparatus for copper wire processing described above, a cooling pipe is also provided on the side of the second annealing wheel. The cooling pipe covers the copper wire that has completed the annealing operation and is used to cool the copper wire.
[0013] In the annealing apparatus for copper wire processing described above, a third detection element is provided on the side of the cooling pipe to detect color changes on the surface of the copper wire.
[0014] In the annealing apparatus for copper wire processing described above, a number of guide wheels are also provided on the operating table. The copper wire between the preheating wheel and the first annealing wheel is movably abutted against the guide wheels, and the guide wheels are used to provide path guidance for the copper wire.
[0015] In the aforementioned annealing apparatus for copper wire processing, a support wheel is also provided on the operating table, which is located between two adjacent guide wheels and moves against the copper wire.
[0016] In the annealing apparatus for copper wire processing described above, a pressing wheel is also provided on the side of the first annealing wheel, which moves against the copper wire to apply pressure to the copper wire.
[0017] In the annealing apparatus for copper wire processing described above, the surfaces of the first annealing wheel and the second annealing wheel are coated with a high-temperature resistant material.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] (1) A pipe is covered on the outside of the copper wire between the first annealing wheel and the second annealing wheel. When the copper wire is annealed, nitrogen is filled into the pipe and the air in the pipe is discharged to prevent the copper wire from oxidizing when it comes into contact with the air during the annealing process. As an inert gas, nitrogen can effectively isolate oxygen and other potentially harmful gases such as water vapor in the air, thereby protecting the surface of the copper wire from oxidation.
[0020] (2) The ratio of the copper wire length L1 between the preheating wheel and the first annealing wheel to the copper wire length L2 between the first annealing wheel and the second annealing wheel is set to L1 / L2≥10, and the voltages of the preheating circuit and the annealing circuit are equal. This design controls the resistance and power distribution by adjusting the copper wire length, realizing the gentle heating of the preheating section and the rapid high-temperature heating of the annealing section, meeting the process requirements of different stages.
[0021] (3) The first detection element monitors the oxygen concentration, the second detection element monitors the nitrogen input flow rate, and the third detection element detects the color change on the surface of the copper wire. These measures work together to achieve precise monitoring and adjustment of key parameters during the annealing process, thereby ensuring the quality and consistency of the copper wire treatment. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this scheme.
[0023] In the diagram, 1 is the operating table; 2 is the preheating wheel; 3 is the first annealing wheel; 4 is the second annealing wheel; 5 is the pipe; 6 is the first inspection piece; 7 is the second inspection piece; 8 is the cooling pipe; 9 is the third inspection piece; 10 is the guide wheel; 11 is the support wheel; and 12 is the clamping wheel. Detailed Implementation
[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0026] like Figure 1 As shown, this solution provides an annealing device for copper wire processing, used to anneal copper wire that has been drawn. The annealing device includes: an operating table 1; a preheating wheel 2, a first annealing wheel 3, and a second annealing wheel 4 are arranged on the operating table 1, and the copper wire contacts the preheating wheel 2, the first annealing wheel 3, and the second annealing wheel 4 in sequence; the preheating wheel 2, the first annealing wheel 3, and the copper wire between them are connected to a preheating circuit to preheat the copper wire; the first annealing wheel 3, the second annealing wheel 4, and the copper wire between them are connected to an annealing circuit to perform an annealing operation on the copper wire; a pipe 5 covers the outside of the copper wire between the first annealing wheel 3 and the second annealing wheel 4, and the pipe 5 is filled with nitrogen gas, which is used to isolate oxygen.
[0027] During operation, the drawn copper wire is pulled onto the operating table 1 and sequentially contacts the preheating wheel 2, the first annealing wheel 3, and the second annealing wheel 4. The copper wire between the preheating wheel 2 and the first annealing wheel 3 is preheated by the preheating circuit to reach a suitable annealing temperature. The preheated copper wire is then pulled to the second annealing wheel 4, where it undergoes annealing through the annealing circuit. During this process, nitrogen gas is introduced into the pipe 5 covering the outside of the copper wire between the first annealing wheel 3 and the second annealing wheel 4, replacing the original air and preventing the copper wire from contacting air during annealing. Oxidation does not occur; nitrogen, as an inert gas, can effectively isolate oxygen and other potentially harmful gases in the air, such as water vapor, thereby protecting the copper wire surface from oxidation. In addition, the clean environment provided by nitrogen not only helps prevent oxidation, but also significantly reduces the deposition of dust, smoke and other fine particles on the copper wire surface, further improving the quality of the final product. Due to the stable chemical properties of nitrogen, it will not cause aging or deformation of non-metallic parts such as rubber seals and bakelite insulated wheels, unlike high-temperature steam. This not only extends the service life of these parts, but also significantly reduces the maintenance cost of the equipment.
[0028] Furthermore, the length of the copper wire between the preheating wheel 2 and the first annealing wheel 3 is L1, and the length of the copper wire between the first annealing wheel 3 and the second annealing wheel 4 is L2. The voltages of the preheating circuit and the annealing circuit are equal, and L1 / L2≥10.
[0029] The first annealing wheel 3 is connected to both the preheating circuit and the annealing circuit. Specifically, the first annealing wheel 3 can be used as a common electrode connected to the negative terminal, while the preheating wheel 2 and the second annealing wheel 4 are connected to the positive terminals of the preheating circuit and the annealing circuit, respectively. This forms two relatively independent circuits, namely the preheating circuit and the annealing circuit, with equal voltages. With the cross-sectional area of the copper wire remaining constant, the resistance of the copper wire is proportional to its length. Since L1 / L2≥10, the copper wire length L1 between the preheating wheel 2 and the first annealing wheel 3 is relatively long, therefore its resistance is larger. According to the power formula P=U2 / R, under the condition of equal voltage... Under these conditions, the higher the resistance, the lower the power, and therefore the less heat is generated by that section of copper wire per unit time. The copper wire length L2 between the first annealing wheel 3 and the second annealing wheel 4 is relatively short, so its resistance is relatively low. According to the power formula P=U2 / R, under the condition of equal voltage, the lower the resistance, the higher the power, thereby achieving rapid high-temperature heating of the copper wire and meeting the requirements of the annealing process. Through the above design, the longer L1 section achieves sufficient preheating of the copper wire, while the shorter L2 section quickly completes the high-temperature annealing operation, thereby ensuring that the entire device can efficiently and stably achieve the preheating and annealing operation of the copper wire.
[0030] In order to detect the oxygen concentration in the pipeline 5, a first detection element 6 is also provided on the operating table 1, which is located at one end of the pipeline 5. Since the annealing process needs to be carried out in a low oxygen environment to prevent oxidation, accurate monitoring of oxygen concentration is crucial to ensuring product quality. The first detection element 6 is preferably an oxygen concentration sensor.
[0031] In order to monitor the nitrogen input flow rate in pipeline 5, a second detection element 7 is also provided on the side of the first detection element 6, and the second detection element 7 is preferably a flow meter.
[0032] The setup of the first inspection piece 6 and the second inspection piece 7 ensures that the copper wire in the annealing device can be processed under optimal conditions, namely, the annealing process is completed in a controlled, low-oxygen or even oxygen-free environment, thereby improving product quality and reducing defects. This design reflects the pursuit of process precision as well as considerations for production efficiency and cost control.
[0033] In order to cool the copper wire after the annealing operation, a cooling pipe 8 is also provided on the side of the second annealing wheel 4. The cooling pipe 8 covers the copper wire after the annealing operation and is used to cool the copper wire after the annealing operation.
[0034] A cavity is provided inside the cooling pipe 8, and a through hole is left in the cavity for the copper wire to pass through. When the copper wire passes through this through hole, it will contact the inner wall of the through hole. Coolant is injected into the cavity. Based on the principle of heat exchange, the coolant indirectly contacts the copper wire through the through hole wall, thereby removing the heat from the copper wire and achieving rapid cooling. During the cooling process, the copper wire and the coolant do not come into direct contact, which can effectively avoid unnecessary deformation or oxidation of the copper wire during the cooling process, ensuring its consistency and reliability in subsequent processing or use.
[0035] To detect whether the annealed copper wire has oxidation, a third detection element 9 is installed on the side of cooling pipe 8 5 to monitor the color change of the copper wire surface. If the copper wire undergoes an oxidation reaction, its color will turn dark red. Based on the detection results provided by the third detection element 9, the effectiveness of the nitrogen protective atmosphere during the annealing process can be evaluated, and the concentration of nitrogen flowing into pipe 5 can be adjusted accordingly to ensure that future batches of copper wire will not undergo oxidation during the annealing process, thereby ensuring product quality.
[0036] The operating table 1 is also equipped with several guide wheels 10. The copper wire between the preheating wheel 2 and the first annealing wheel 3 is movable and abuts against these guide wheels 10. The guide wheels 10 provide path guidance for the copper wire, allowing the copper wire to move along a curved path, thereby effectively utilizing space and helping to achieve the design requirement of L1 / L2≥10 without significantly increasing the distance between the preheating wheel 2 and the first annealing wheel 3. The copper wire starts from the preheating wheel 2, passes through several guide wheels 10 in sequence, and is finally guided to the first annealing wheel 3. The number and position of the guide wheels 10 not only determine the movement path of the copper wire, but also help maintain appropriate tension, ensuring that the copper wire moves stably along the predetermined path between the preheating wheel 2 and the first annealing wheel 3. This arrangement can be flexibly adjusted according to the production process requirements to meet the requirements for the length of the copper wire between the preheating wheel 2 and the first annealing wheel 3, and works with the preheating circuit to maintain the preheating temperature, ensuring that the process requirements are met.
[0037] More preferably, the operating table 1 is also provided with a support wheel 11, which is located between two adjacent guide wheels 10 and moves against the copper wire. The support wheel 11 is used to provide support for the copper wire, ensuring that the copper wire maintains appropriate tension and path during the preheating stage, thereby ensuring the stability of the processing and the consistency of product quality.
[0038] More preferably, a clamping wheel 12 is also provided on the side of the first annealing wheel 3, which moves against the copper wire; the clamping wheel 12 applies a certain pressure to the copper wire, which can help adjust the surface state of the copper wire, making it more uniform and flat before entering the annealing operation.
[0039] More preferably, the surfaces of the first annealing wheel 3 and the second annealing wheel 4 are coated with a high-temperature resistant material to improve the durability and working efficiency of the equipment. The selection of a suitable high-temperature resistant material should consider its thermal stability, oxidation resistance, and mechanical strength, as well as specific application requirements, including operating temperature, ambient atmosphere (such as the presence or absence of oxygen), required mechanical properties, and cost factors. For the first annealing wheel 3 and the second annealing wheel 4, considering the requirement to simultaneously possess high temperature resistance, wear resistance, and a certain degree of smoothness, they can be ceramic materials or special coatings (such as metal matrix composite coatings incorporating ceramic particles). These materials can not only withstand high-temperature environments but also reduce frictional wear, thereby extending the service life of the equipment and improving processing efficiency.
[0040] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0041] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.
[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. An annealing apparatus for copper wire processing, used to perform annealing operations on drawn copper wire, characterized in that, The annealing apparatus includes: Control panel; The operating table is equipped with a preheating wheel, a first annealing wheel, and a second annealing wheel, and copper wires are in contact with the preheating wheel, the first annealing wheel, and the second annealing wheel in sequence; The preheating wheel, the first annealing wheel, and the copper wire between them are connected to a preheating circuit to preheat the copper wire; the first annealing wheel, the second annealing wheel, and the copper wire between them are connected to an annealing circuit to perform annealing operations on the copper wire. The copper wire between the first annealing wheel and the second annealing wheel is covered with a pipe, which is filled with nitrogen gas to isolate oxygen.
2. The annealing apparatus for copper wire processing as described in claim 1, characterized in that, The length of the copper wire between the preheating wheel and the first annealing wheel is L1, and the length of the copper wire between the first annealing wheel and the second annealing wheel is L2; wherein, the voltages of the preheating circuit and the annealing circuit are equal, and L1 / L2≥10.
3. The annealing apparatus for copper wire processing as described in claim 1, characterized in that, The operating platform is also equipped with a first detection device, which is located at one end of the pipeline and is used to detect the oxygen concentration.
4. The annealing apparatus for copper wire processing as described in claim 3, characterized in that, A second detection element is also provided on the side of the first detection element, which is used to detect the nitrogen input flow rate.
5. The annealing apparatus for copper wire processing as described in claim 1, characterized in that, A cooling pipe is also provided on the side of the second annealing wheel. The cooling pipe covers the copper wire that has completed the annealing operation and is used to cool the copper wire.
6. The annealing apparatus for copper wire processing as described in claim 5, characterized in that, A third detection element is provided on the side of the cooling pipe to detect color changes on the surface of the copper wire.
7. The annealing apparatus for copper wire processing as described in claim 1, characterized in that, The operating table is also equipped with several guide wheels. The copper wire between the preheating wheel and the first annealing wheel is movable and abuts against the guide wheels. The guide wheels are used to provide path guidance for the copper wire.
8. The annealing apparatus for copper wire processing as described in claim 7, characterized in that, The operating platform is also equipped with support wheels, which are located between two adjacent guide wheels and move against the copper wire.
9. The annealing apparatus for copper wire processing as described in claim 1, characterized in that, A pressure wheel is also provided on the side of the first annealing wheel, which moves against the copper wire to apply pressure to the copper wire.
10. The annealing apparatus for copper wire processing as described in claim 1, characterized in that, The surfaces of the first annealing wheel and the second annealing wheel are coated with a high-temperature resistant material.