Flat electromagnetic wire annealing cooling device

Abstract

The invention provides a flat electromagnetic wire annealing and cooling device, which comprises an annealing furnace and a cooling assembly, and is characterized in that the annealing furnace is used for carrying out heat treatment on a flat electromagnetic wire; the cooling assembly is used for cooling the flat electromagnetic wire after heat treatment; the cooling assembly comprises a pressurizing treatment tank and a motion feedthrough device, and the pressurizing treatment tank can be penetrated by the flat electromagnetic wire; the pressurization treatment tank is filled with an annealing cooling medium, and the annealing cooling medium can be in contact with the flat electromagnetic wire in the closed cavity for heat exchange; the flat electromagnetic wire cooling device has the beneficial effects that the annealed flat electromagnetic wire is conveyed into the cooling assembly, the cooling assembly comprises the pressurizing treatment tank, the flat electromagnetic wire can penetrate through the pressurizing treatment tank, the flat electromagnetic wire can be cooled by taking the supercritical CO2 as the annealing cooling medium, and the cooling efficiency is improved. In the process, the supercritical CO2 exchanges heat with the flat electromagnetic wire, so that the flat electromagnetic wire is not in contact with oxygen in the cooling process, an oxide layer is prevented from being formed, and the surface quality of the flat electromagnetic wire after annealing and cooling is improved.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic wire cooling technology, specifically relating to a flat electromagnetic wire annealing and cooling device. Background Technology

[0002] Annealing of electromagnetic wire is a crucial heat treatment performed on copper conductors after stretching and forming to eliminate internal stress and restore their ductility and conductivity. The temperature of the conductor after annealing reaches as high as 500-600℃, and the quality and efficiency of its cooling process directly determine the conductor's microstructure, mechanical properties, and surface quality.

[0003] In existing technologies, forced air cooling is generally used when annealing and cooling electromagnetic wires. This involves blowing cold air into the high-temperature section of the wire, where heat exchange occurs through contact between the cold air and the high-temperature section. However, this cooling method is relatively inefficient. Although water mist can be mixed into the cold air, it also has adverse effects. For example, when water mist is mixed into the cold air, the high-temperature conductor instantly generates large amounts of water vapor upon contact with the water. In the presence of oxygen, this easily leads to oxidation and discoloration of the conductor surface, forming a thin film of copper oxide or cuprous oxide. This not only affects the appearance but also impairs the solderability of the conductor. Summary of the Invention

[0004] The purpose of this invention is to provide a flat electromagnetic wire annealing and cooling device that can improve cooling efficiency and enhance the surface properties of the flat electromagnetic wire.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is a flat electromagnetic wire annealing and cooling device, comprising an annealing furnace and a cooling assembly, wherein the annealing furnace is used to heat treat the flat electromagnetic wire; and the cooling assembly is used to cool the heat-treated flat electromagnetic wire. The cooling assembly includes a pressurized processing tank and a motion feeder. The pressurized processing tank can be penetrated by a flat electromagnetic wire. The motion feeder is installed on the pressurized processing tank and can be coupled with the flat electromagnetic wire, which enables the interior of the pressurized processing tank to be a sealed cavity and allows the flat electromagnetic wire to move. The pressurized processing tank is filled with an annealing cooling medium, which can contact the flat electromagnetic wire for heat exchange in the sealed cavity. The annealing cooling medium is supercritical CO2.

[0006] Furthermore, the pressurized processing tank is connected to a transfer assembly, allowing the annealing cooling medium to flow between the pressurized processing tank and the transfer assembly.

[0007] Furthermore, the transfer components include: The reflux housing is used to hold the annealing cooling medium. The reflux pipe connects the reflux housing and the pressurization tank; The annealing cooling medium can enter the reflux shell or pressurization tank through the reflux pipe.

[0008] Furthermore, an intermediate shell is fitted onto the reflux shell, and the intermediate shell is filled with a heat exchange medium, so that the heat exchange medium can exchange heat with the annealing cooling medium in the reflux shell.

[0009] Furthermore, the pressurized processing tank is connected to a spraying assembly, which is coupled to the transfer assembly. The spraying assembly can spray out the annealing cooling medium inside the pressurized processing tank, so that the sprayed annealing cooling medium comes into contact with the transfer assembly.

[0010] Furthermore, the spraying assembly includes an annular shell and a cooling nozzle, the cooling nozzle being mounted on the annular shell and capable of spraying annealing cooling medium onto the transfer assembly through the cooling nozzle.

[0011] Furthermore, the pressurization tank is connected to a media storage component, which stores liquid CO2, and the liquid CO2 can enter the pressurization tank.

[0012] Furthermore, the pressurization tank is connected to a conversion actuator, which can increase the pressure and temperature inside the pressurization tank, thereby converting the liquid CO2 inside the pressurization tank into supercritical CO2.

[0013] Furthermore, the device also includes a heating space, which is connected to the cooling assembly via an intermediate conduit. The flat electromagnetic wire passes through the heating space and the intermediate conduit in sequence before entering the cooling assembly.

[0014] Furthermore, the annealing furnace includes a heating element located within a heating space, through which the flat electromagnetic wire can pass and be heat-treated.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the annealed flat electromagnetic wire is fed into the cooling assembly, and the cooling assembly includes a pressurized treatment tank through which the flat electromagnetic wire can pass. The pressurized treatment tank contains supercritical CO2, which can be used as the annealing cooling medium to cool the flat electromagnetic wire. During this process, the supercritical CO2 exchanges heat with the flat electromagnetic wire, so that the flat electromagnetic wire does not come into contact with oxygen during the cooling process, thereby avoiding the formation of an oxide layer and improving the surface quality of the flat electromagnetic wire after annealing and cooling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic cross-sectional view of the pressurization tank of the present invention; Figure 4 This is a schematic diagram showing the connection between the intermediate shell and the pressurization tank of the present invention; Figure 5 This is a schematic diagram of the connection structure between the media storage component and the pressurization tank of the present invention; Figure 6 This is a schematic diagram of the connection between the cache tray and the hanging tube of the present invention; Figure 7 This is a schematic diagram of the spray assembly structure of the present invention.

[0017] Among them, 1-heating protective shell, 2-heating space, 3-heating element, 4-cooling unit shell, 5-inner processing chamber, 6-intermediate conduit, 7-pressurization tank, 8-medium storage component, 9-heating kit, 10-motion feeder, 11-seal, 12-flat electromagnetic wire, 13-return shell, 14-return inlet pipe, 15-return outlet pipe, 16-intermediate shell, 17-heat exchange inlet pipe, 18-heat exchange outlet pipe, 19-gas phase inlet valve, 20-liquid phase inlet valve, 22-hanging pipe, 23-extension pipe, 24-bottom tray, 25-buffer tank, 26-guide plate, 27-heat exchange plate, 28-heat exchange tank, 29-flat opening, 30-annular shell, 31-drain pipe, 32-cooling nozzle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] See Figures 1 to 2 As shown, a flat electromagnetic wire annealing and cooling device includes an annealing furnace and a cooling assembly. The cooling assembly has an inner processing chamber 5. The flat electromagnetic wire 12 can first pass through the annealing furnace, during which the flat electromagnetic wire 12 is annealed by the annealing furnace. After the flat electromagnetic wire 12 is removed from the annealing furnace, it directly enters the inner processing chamber 5 of the cooling assembly, where the flat electromagnetic wire 12 is cooled by the cooling assembly.

[0021] In this technical solution, the annealing furnace adopts the existing medium-frequency induction annealing furnace. The annealing furnace is installed on the heating protective shell 1, and a heating space 2 is formed inside the heating protective shell 1. A feed port and a discharge port are respectively provided at both ends of the heating protective shell 1. The heating element 3 (induction coil / sensor) of the annealing furnace is located in the heating space 2. After the flat electromagnetic wire 12 enters the heating space 2 through the feed port, it continues to move and passes through the area surrounded by the heating element 3. During this process, the flat electromagnetic wire 12 is heated by the heating element. Then, the heated flat electromagnetic wire 12 is removed from the discharge port. See Figure 2 and Figure 5 As shown, the cooling assembly includes a cooling unit shell 4, an inner processing chamber 5 is provided inside the cooling unit shell 4, the cooling unit shell 4 is provided with an inlet, and an intermediate conduit 6 is connected to the inlet of the cooling unit shell 4. The cooling unit shell 4 is connected to the heating protection shell 1 through the intermediate conduit 6. At this time, the annealing area of ​​the flat electromagnetic wire 12 can move from the heating space 2 to the inner processing chamber 5. A pressurized processing tank 7 is provided in the inner processing chamber 5, and the flat electromagnetic wire 12 is cooled by the pressurized processing tank 7.

[0022] The cooling assembly also includes a media storage component 8, which is connected to the pressurization tank 7 via a delivery pipe. Liquid CO2 in the media storage component 8 flows into the pressurization tank 7 through the delivery pipe. The delivery pipe is inserted from the bottom of the cooling unit shell 4 into the inner processing chamber 5, and finally connects the delivery pipe to the pressurization tank 7, so that liquid CO2 can enter the pressurization tank 7.

[0023] In this technical solution, the pressurization tank 7 is located inside the cooling unit shell 4. A heating kit 9 ​​is also provided inside the cooling unit shell 4. The heating kit 9 ​​can be fitted onto the pressurization tank 7. The heating kit 9 ​​can enhance the temperature and pressure inside the pressurization tank 7. Liquid CO2 is stored in the medium storage component 8, and then the liquid CO2 is transported into the pressurization tank 7, where the liquid CO2 is heated and pressurized, and the liquid CO2 is transformed into supercritical CO2 (sCO2) in a sealed environment, so that an annealing cooling medium is formed in the pressurization tank 7.

[0024] In this embodiment, two symmetrically arranged motion feeders 10 are provided on the pressurization tank 7. When the flat electromagnetic wire 12 enters the pressurization tank 7, it passes through one of the motion feeders 10. When the flat electromagnetic wire 12 moves out of the pressurization tank 7, it passes through the other motion feeder 10. By setting the motion feeders 10, the flat electromagnetic wire 12 can enter the pressurization tank 7 while keeping the inside of the pressurization tank 7 sealed. The heat-treated flat electromagnetic wire 12 exchanges heat with supercritical CO2. To enhance the overall processing effect, a seal 11 is provided at the feed inlet of the heating protective shell 1, and a seal 11 is also provided inside the intermediate guide tube 6. The flat electromagnetic wire 12 can pass through the seal 11. This seal 11 can be a motion feeder 10, such as an enhanced stuffing box / mechanical seal feeder.

[0025] In this technical solution, when annealing and cooling the flat electromagnetic wire 12, it is necessary to bring the flat electromagnetic wire 12 into contact with the annealing cooling medium. Moreover, this contact is not static; that is, the cooling medium is in a flowing state, so that the flat electromagnetic wire 12 can be cooled effectively.

[0026] The following are simulated comparative experimental data of different cooling methods under the same specifications (Φ2.0mm copper electromagnetic wire, annealing temperature 550°C); experimental group Cooling medium Cooling time (to 50°C) Surface oxide layer thickness (nm) Cooling energy consumption per unit product (kW·h / t) Surface appearance and cleanliness description Group A Circulating cooling water ~15 seconds 150-300 25 Dark red / purple, with water stains, poor cleanliness. Group B Air-cooled (200°C air) ~90 seconds 50-120 18 Pale yellow / light red, with slight discoloration, and may contain dust. Group C <![CDATA[High purity nitrogen gas (N2)]]> ~180 seconds <10 120 Metallic original color, bright, clean. Group D <![CDATA[Supercritical CO2]]> ~30 seconds Not detected 45 It has the original metallic color, a mirror-like shine, no blemishes, and the highest level of cleanliness. The following conclusions can be drawn from the above experimental data: 1. Cooling efficiency: Water has the fastest cooling efficiency when used as the cooling medium, while supercritical CO2 has the second fastest cooling efficiency (but much faster than inert gases), and nitrogen has the slowest cooling efficiency.

[0027] 2. Surface quality: Supercritical CO2 is used as the cooling medium, which performs best in both cleanliness (lowest roughness) and oxidation prevention (no oxide layer).

[0028] 3. Energy consumption: When supercritical CO2 is used as the cooling medium, the energy consumption for cooling is much lower than that of inert gas. Although it is slightly higher than that of water cooling and air cooling, considering the advantages such as the excellent surface quality and waterless treatment it brings, the energy efficiency ratio is very competitive.

[0029] 4. Overall performance: Supercritical CO2 cooling technology achieves optimized surface quality and significant reduction in energy consumption while ensuring efficient cooling.

[0030] See Figure 2 and Figure 4As shown, in this technical solution, in order to continuously cool the flat electromagnetic wire 12, a transfer assembly is provided on the pressurization tank 7. This assembly can draw out supercritical CO2 from the pressurization tank 7 and buffer the supercritical CO2. The transfer assembly includes a reflux pipe and a reflux housing 13. The reflux pipe includes a reflux inlet pipe 14 and a reflux outlet pipe 15. Both the reflux inlet pipe 14 and the reflux outlet pipe 15 are connected between the reflux housing 13 and the pressurization tank 7. The supercritical CO2 located in the pressurization tank 7 can enter the reflux housing 13 through the reflux inlet pipe 14, and then... The supercritical CO2 can flow into the return housing 13 through the return output pipe 15. The return inlet pipe 14 is connected to the bottom of the pressurization tank 7, and the return input pipe is connected to the upper part of the pressurization tank 7. A high-pressure circulation pump is also installed on the pressurization tank 7 or the return housing 13. The operation of the high-pressure circulation pump can allow the supercritical CO2 in the pressurization tank 7 to enter the return housing 13, and at the same time, it can transport the supercritical CO2 in the return housing 13 into the pressurization tank 7, forming a circulation flow of supercritical CO2. In this way, supercritical CO2 can form a circulation flow between the pressurization tank 7 and the return housing 13.

[0031] It should be noted that a regulating valve is installed on the aforementioned reflux pipe to control the reflux rate. A check valve is also installed to prevent the backflow of supercritical CO2 in the reflux pipe, allowing the supercritical CO2 to be stored in the transfer component. At the same time, a pressure relief valve and a drain valve are installed on the pressurization tank 7.

[0032] In addition, an intermediate shell 16 is installed on the pressurization tank 7. The interior of the intermediate shell 16 is a slow-flow space. A heat exchange inlet pipe 17 and a heat exchange outlet pipe 18 are connected to the intermediate shell 16. The return shell 13 penetrates the intermediate shell 16, that is, a part of the return shell 13 is located inside the intermediate shell 16. It can deliver heat exchange media such as cold water into the intermediate shell 16. When the annealing cooling medium in the return shell 13 needs to be heated, the heat exchange medium can also be hot water, so that the annealing cooling medium can be heat exchanged.

[0033] In this technical solution, since air is initially stored in the pressurization tank 7, it is necessary to remove the air from the pressurization tank 7 and then transport liquid CO2 into the pressurization tank 7 to ensure the purity of supercritical CO2. Specifically, an exhaust valve is installed at the top of the pressurization tank 7 to discharge the air inside the pressurization tank 7. At the same time, a gas phase inlet valve 19 and a liquid phase inlet valve 20 are installed on the pressurization tank 7. Both the gas phase inlet valve 19 and the liquid phase inlet valve 20 are located at the bottom of the pressurization tank 7. The media storage component 8 is a storage tank. A gas phase outlet valve and a liquid phase valve are installed on the media storage component 8. The liquid phase valve is located at the bottom of the media storage component 8. The gas phase outlet valve is connected to the gas phase inlet valve 19 through a delivery pipe, while the liquid phase valve is connected to the liquid phase inlet valve 20 on the pressurization tank 7 through a siphon pipe.

[0034] The core challenge in safely and efficiently transferring liquid CO2 from the storage tank to the pressurized treatment tank 7 lies in first replacing the air in the chamber with pure CO2 to prevent air (mainly oxygen and nitrogen) from mixing in. The standard operating procedure of this technical solution follows the principle of "replacement first, then filling," dividing the entire process into two main stages: The first stage is the purging and replacement stage, in which the air in the pressurization tank 7 is replaced with CO2 gas. Then, the second stage, namely the liquid phase filling and pressurization stage, is entered. In this stage, the gas in the pressurization tank 7 is pure CO2. Then, liquid CO2 is injected and the working pressure is established. In actual operation, the medium storage component 8 is a special container with a siphon tube, and the working pressure is about 5-6 MPa (at room temperature). The pressurization tank 7 is equipped not only with a gas phase inlet valve 19, a liquid phase inlet valve 20, and an exhaust valve, but also with a pressure gauge and a level gauge. In the first stage, CO2 gas is used to "squeeze" the air out of the pressurization tank 7. The gas phase outlet valve of the media storage component 8 is slowly opened, allowing CO2 gas (pressure approximately 5-6 MPa) from the upper part of the media storage component 8 to flow into the pressurization tank 7. Since CO2 is denser than air, it gradually "fills" the bottom of the pressurization tank 7 upwards. As CO2 gas enters, the existing air is "squeezed" out from the exhaust valve at the top. Then, the depressurization process is repeated, that is, the pressure in the pressurization tank 7 is completely released to atmospheric pressure through the exhaust valve. After the exhaust valve is closed, CO2 is continued to be introduced into the pressurization tank 7. When the pressure in the pressurization tank 7 increases, the exhaust valve is opened again. This "pressurization-depressurization" process is like "rinsing" the pressurization tank 7 with CO2 gas. Each time this process is repeated, the air concentration in the chamber decreases significantly. After repeating this process about 3-4 times, the CO2 concentration in the pressurization tank 7 can be significantly increased.

[0035] Then, the second stage of liquid phase filling and pressure building can be carried out to keep the pressure of the medium storage component 8 at 5.5 MPa, which is slightly higher than the current pressure inside the pressurization tank 7. Due to the pressure difference, when the liquid phase valve at the bottom of the medium storage component 8 is opened, liquid CO2 will automatically flow into the pressurization tank 7 through the siphon tube. It is important to note that during the process of allowing liquid CO2 to flow into the pressurization tank 7, the liquid phase valve on the medium storage component 8 and the liquid phase inlet valve 20 on the pressurization tank 7 need to be opened slowly. This is mainly to control the flow rate and prevent the pipes and valves from freezing due to the rapid vaporization and heat absorption of liquid CO2. After the liquid CO2 enters the pressurization tank 7, the heating kit 9 ​​is installed inside the cooling unit shell 4 and is fitted onto the pressurization tank 7. Therefore, the liquid CO2 in the pressurization tank 7 can be heated by the heating kit 9, so that the temperature inside the pressurization tank 7 is higher than the critical temperature of CO2 (31.1℃). At this time, some of the liquid CO2 will rapidly vaporize, causing the pressure and temperature in the chamber to rise simultaneously. Then, the pressurization tank 7 is pressurized. For example, a booster pump can be installed on the siphon pipe. After the booster pump is started, the liquid CO2 is pressurized and pumped into the pressurization tank 7 until the target pressure (e.g., 8-20 MPa) is reached. Meanwhile, the temperature is controlled above 31.1°C by the heating kit 9 ​​on the pressurization tank 7, which ultimately causes the liquid CO2 in the pressurization tank 7 to form supercritical CO2; The booster pump and the booster kit work together to form a conversion actuator, which enables the formation of supercritical CO2 in the booster tank 7.

[0036] In this technical solution, the pipes and valves must be made of special materials suitable for low temperature (antifreeze) and high pressure (such as stainless steel 316). The valves must be needle valves or gate valves to accurately control the flow rate. At the same time, a safety valve must be installed on the pressurization tank 7.

[0037] Alternatively, during the process of transferring liquid CO2 from the media storage unit 8 into the pressurization tank 7, a vacuum displacement method can be used for the transfer, for example: First, use a vacuum pump to evacuate the pressurization tank 7 to a medium vacuum. Then, fill the pressurization tank 7 with CO2 gas to a pressure slightly above atmospheric pressure. Evacuate again and fill with CO2 gas. This method only requires 1-2 cycles to achieve extremely high displacement purity and consumes less energy.

[0038] Once supercritical CO2 is formed inside the pressurized treatment tank 7, it is used as the annealing cooling medium. The supercritical CO2 is allowed to flow and come into contact with the flat electromagnetic wire 12. By utilizing the properties of supercritical CO2, which has a density similar to that of a liquid and high diffusivity and low viscosity similar to that of a gas, efficient and uniform annealing cooling of the flat electromagnetic wire 12 is achieved.

[0039] See Figures 3 to 6 As shown, in order to ensure that the annealing cooling medium can fully contact the flat electromagnetic wire 12, a horizontally extending hanging pipe 22 is provided in the pressurized treatment tank 7. The hanging pipe 22 is connected to the upper end of the return output pipe 15 through the extension pipe 23, so that the annealing cooling medium sprayed in the return output pipe 15 can enter the hanging pipe 22. The hanging pipe 22 is provided with a long strip-shaped flow port extending along the length direction. A buffer tray is provided below the hanging pipe 22. The buffer tray is connected to the long strip-shaped flow port. After the annealing cooling medium in the return shell 13 flows back into the hanging pipe 22, the annealing cooling medium will flow into the buffer tray and accumulate in the buffer tray.

[0040] The buffer tray includes a bottom tray 24, on which a buffer slot 25 is provided. A guide plate 26 is connected to the bottom tray 24, and the upper end of the guide plate 26 is connected to the elongated flow port, so that the annealing cooling medium in the hanging pipe 22 can flow into the buffer slot 25. An upper tray 27 is connected to the bottom tray 24, and a receiving slot 28 is provided on the upper tray 27. The upper tray 27 is connected to the slot of the bottom tray 24. A flat opening 29 for passing through the flat electromagnetic wire 12 is provided at the end of the upper tray 27, so that the flat electromagnetic wire can pass through the flat opening 29, and the buffer slot 25 and the receiving slot 28 are connected. At this time, the flat electromagnetic wire is supported to a certain extent by the upper tray 27.

[0041] The annealing cooling medium (sCO2) in the buffer tank 25 can flow into the receiving tank 28. When the buffer tank 25 is full of annealing cooling medium, the cooling medium can flow into the receiving tank 28. Because the speed at which the annealing cooling medium flows from the buffer tank 25 into the receiving tank 28 is greater than the speed at which the annealing cooling medium in the receiving tank 28 flows out from the flat opening 29, the annealing cooling medium in the receiving tank 28 will increase, eventually submerging the flat electromagnetic wire 12, so that the flat electromagnetic wire 12 can fully contact the annealing cooling medium.

[0042] It should be noted that when the annealing cooling medium (sCO2) is delivered into the pressurization tank 7 through the return output pipe 15, the flat electromagnetic wire 12 can be in a static state. At this time, a closed chamber is formed inside the pressurization tank 7, so that the flat electromagnetic wire can be cooled by supercritical CO2. The flat electromagnetic wire 12 can also be in a moving state. In this case, the pressure inside the pressurization tank 7 needs to be continuously adjusted (e.g., pressurization adjustment) to ensure that the pressure inside the pressurization tank 7 is maintained at the target pressure. This ensures that when the flat electromagnetic wire 12 is moving, the annealing cooling medium inside the pressurization tank 7 is still supercritical CO2. Ultimately, the flat electromagnetic wire 12 is cooled by supercritical CO2. However, it should be noted that the heating element 3 of the annealing furnace needs to be adjusted at this time. A high-power heating element 3 should be replaced to improve the heat treatment efficiency of the flat electromagnetic wire 12. At this time, the feeding and taking-up rates of the flat electromagnetic wire 12 also need to be adjusted to achieve overall balance.

[0043] See Figure 2 and Figure 7 As shown, in this embodiment, a spray assembly is connected to the drain valve, which can spray out the annealing cooling medium in the pressurized treatment tank 7. Moreover, the spray assembly is coupled to the transfer assembly, and the supercritical CO2 sprayed from the spray assembly can contact the return pipe or return shell 13 to further cool the supercritical CO2 in the return pipe or return shell 13, thereby cooling the heated cooling medium to facilitate heat exchange between the cooling medium and the flat electromagnetic wire 12.

[0044] In this embodiment, the spraying assembly includes an annular shell 30, which is connected to a drain valve via a drain pipe 31. Both the annular shell 30 and the drain pipe 31 are high-pressure pipes. Several cooling nozzles 32 are installed on the inner circumferential surface of the annular shell 30. The return shell 13 or the return pipe can pass through the area enclosed by the annular shell 30 and can simultaneously spray annealing cooling medium through the several cooling nozzles 32. The annealing cooling medium is sprayed at extremely high speed through the nozzle orifices into an atmospheric (or low-pressure) environment. Since the annealing cooling medium is supercritical CO2, at this instant, the supercritical CO2 undergoes adiabatic expansion, phase change, and rapid cooling, making the sprayed mixture a two-phase turbulent flow of high-speed, low-temperature "dry ice snowflakes" and CO2 gas. This high-speed jet directly impacts the surface of the return pipe or the return shell 13, resulting in convective heat transfer: the low-temperature gas directly and efficiently convects with the hot surface. Meanwhile, when dry ice microcrystals collide with a hot surface, they sublimate instantly (changing directly from solid to gas). This process absorbs more latent heat than the latent heat of vaporization, resulting in extremely high cooling efficiency.

[0045] In this technical solution, the space inside the pressurization tank 7 is the cooling space, while the space inside the return pipe is the return space. The connection between the return space and the cooling space is controllable. For example, shut-off valves are installed on both the return inlet pipe 14 and the return outlet pipe 15. When both shut-off valves are closed, the return space and the cooling space are not connected. The liquid phase inlet valve 20 can be installed on the return inlet pipe 14, which can form a new cooling annealing medium in the return shell 13, while the cooling space contains waste cooling annealing medium. At this time, the waste cooling annealing medium in the cooling space can be discharged and finally discharged from the spray assembly.

[0046] In this application, the drain valve can also be connected to a separation chamber (not shown). The annealing cooling medium located in the pressurized treatment tank 7 can enter the separation chamber or the spray assembly. When it enters the separation chamber, it will pass through a pressure reducing valve, thereby reducing the pressure and temperature of the annealing cooling medium so that it can be converted into a mixture of gaseous CO2 and liquid CO2 in the separation chamber. At this time, the dissolved pollutants will precipitate due to the sharp decrease in solubility, thereby enabling the pollutants to be separated by the separator.

[0047] In addition, a gas recovery pipe is installed on the outer casing to recover CO2 gas.

[0048] Finally, the pressurization tank 7 and the heating protection shell 1 in this technical solution can both be made of alumina ceramic, giving them properties such as high pressure resistance and corrosion resistance.

[0049] After comprehensively comparing the technical solution of this invention with the prior art, please refer to the table below: Comparison Dimensions Existing technology (water cooling) Existing technology (air cooling) <![CDATA[Prior art (inert gas, such as N2)]]> <![CDATA[This technology (supercritical CO2)]]> Key improvements brought by this technology Surface cleanliness It is less prone to limescale and spots. Generally, it may be affected by air quality, and there may be dust pollution. It has a high efficiency level but lacks active cleaning capabilities. <![CDATA[The extremely high supercritical CO2 solvent effect enables active cleaning with no residue.]]> Proactive cleaning eliminates scale, oxidation, and particulate contamination. Oxidation level High temperature and moisture levels cause severe oxidation. Oxidation is unavoidable in moderately aerobic environments, and the surface is prone to discoloration. The low-inert atmosphere effectively prevents oxidation. Extremely low / zero oxygen-free closed environment to prevent oxidation. Achieving "zero oxidation" cooling, the surface retains its original metallic color and brightness. Energy consumption Medium-efficiency water cooling is highly efficient, but the water treatment system is energy-intensive. The lower energy consumption mainly comes from the fan, but the cooling time is long. Highly efficient gas cooling, and its preparation and compression processes consume enormous amounts of energy. It has low to medium heat transfer efficiency, closed-loop operation, and high energy efficiency. While achieving top-quality surface finish, energy consumption is far lower than that of inert gas cooling. Environmental protection Poor water consumption may result in wastewater production. The medium-sized pump produces no wastewater, but the fan generates noise and indirect energy consumption. Medium-sized nitrogen production is energy-intensive and has indirect carbon emissions. <![CDATA[Good zero wastewater, CO2 closed-loop cycle, low overall carbon footprint.]]> Environmentally friendly, achieving green and clean production. Process control It generally cools quickly, is easy to quench, and requires minimal control. It is better to adjust the cooling curve by controlling the air temperature / speed to avoid rapid cooling. Generally, the cooling rate is slow and the control range is limited. <![CDATA[Excellent physical properties of supercritical CO2 can be precisely regulated to achieve wide-range and high-precision control of the cooling rate.]]> It provides the most flexible and precise cooling curve control capabilities. Operating costs Low (water bill) + Medium (water treatment fee). Low cost (mainly electricity costs, simple equipment). Very high (continuous gas procurement and compression costs). Medium (high initial investment, operation mainly involves electricity costs, and the medium is recycled). Long-term operating costs are significantly lower than inert gas cooling, resulting in a high overall cost-performance ratio. Therefore, when annealing flat electromagnetic wires using the technical solution of this invention, the energy consumption is relatively low and wastewater is discharged, making the annealing cooling process more environmentally friendly. Moreover, due to the characteristics of supercritical CO2, the formation of an oxide layer on the surface of the flat electromagnetic wires can be avoided during the cooling process.

[0050] Finally, the traction system in this technical solution also includes a pull wire controller, which is connected to a pull rope and connected to a ground anchor via the pull rope. When the pull wire controller winds up the pull rope, it realizes the traction action.

[0051] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flat electromagnetic wire annealing and cooling device, characterized in that, include: Annealing furnace, used for heat treatment of flat electromagnetic wire (12); A cooling assembly for cooling the heat-treated flat electromagnetic wire (12); The cooling assembly includes: The pressurized treatment tank (7) can be penetrated by a flat electromagnetic wire (12); The motion feeder (10) is installed on the pressurized processing tank (7) and can be coupled with the flat electromagnetic wire (12), which can make the inside of the pressurized processing tank (7) a sealed cavity and allow the flat electromagnetic wire (12) to move. The pressurized processing tank (7) is filled with annealing cooling medium, which can exchange heat with the flat electromagnetic wire (12) in the closed cavity; The annealing cooling medium is supercritical CO2.

2. The flat electromagnetic wire annealing and cooling device according to claim 1, characterized in that, The pressurized processing tank (7) is connected to a transfer assembly, and the annealing cooling medium can flow between the pressurized processing tank (7) and the transfer assembly.

3. The flat electromagnetic wire annealing and cooling device according to claim 2, characterized in that, The transfer component includes: Reflux housing (13) is used to hold the annealing cooling medium; The return pipe is connected between the return housing (13) and the pressurization tank (7); The annealing cooling medium can enter the reflux shell (13) or the pressurization tank (7) through the reflux pipe.

4. The flat electromagnetic wire annealing and cooling device according to claim 3, characterized in that, An intermediate shell (16) is fitted onto the return shell (13), and the intermediate shell (16) is filled with a heat exchange medium so that the heat exchange medium can exchange heat with the annealing cooling medium in the return shell (13).

5. The flat electromagnetic wire annealing and cooling device according to claim 2, characterized in that, The pressurized processing tank (7) is connected to a spraying assembly, which is coupled to the transfer assembly. The spraying assembly can spray out the annealing cooling medium in the pressurized processing tank (7) so that the sprayed annealing cooling medium comes into contact with the transfer assembly.

6. The flat electromagnetic wire annealing and cooling device according to claim 5, characterized in that, The jetting assembly includes: Annular shell (30); A cooling nozzle (32) is mounted on the annular shell (30) and is capable of spraying annealing cooling medium onto the transfer assembly through the cooling nozzle (32).

7. The flat electromagnetic wire annealing and cooling device according to claim 1, characterized in that, The pressurized processing tank (7) is connected to a medium storage component (8), which stores liquid CO2 and allows the liquid CO2 to enter the pressurized processing tank (7).

8. The flat electromagnetic wire annealing and cooling device according to claim 7, characterized in that, The pressurization tank (7) is connected to a conversion actuator, which can increase the pressure and temperature inside the pressurization tank (7) so that the liquid CO2 inside the pressurization tank (7) is converted into supercritical CO2.

9. The flat electromagnetic wire annealing and cooling device according to claim 1, characterized in that, It also includes a heating space (2), which is connected to the cooling assembly through an intermediate conduit (6). The flat electromagnetic wire (12) passes through the heating space (2) and the intermediate conduit (6) in sequence and then enters the cooling assembly.

10. The flat electromagnetic wire annealing and cooling device according to claim 9, characterized in that, The annealing furnace includes a heating element (3) located in the heating space (2). The flat electromagnetic wire (12) can pass through the area surrounded by the heating element (3) and be heat-treated by the heating element (3).

Images