A device for preparing copper flat wire by using copper cable extrusion molding

Abstract

The application belongs to the technical field of copper cable processing, and specifically discloses a device for preparing copper flat wire by means of copper cable extrusion forming, which comprises a treatment box, an extrusion mechanism is arranged on one side of the treatment box, a connecting cavity is formed in the treatment box, and guide holes are formed in the two sides of the treatment box; by arranging the annealing module and the treatment box, a closed protection gas circulating system with internal gas pressure higher than that of the outside can be constructed, and oxygen molecular sieves are integrated, so that double antioxidation guarantee is provided for the copper cable annealing process, high-purity nitrogen gas is injected from the air inlet pipe, and an inert environment is formed in the rapid cooling cavity; secondly, the residual oxygen in the circulating gas can be filtered by the oxygen molecular sieves during the flow of the circulating gas in each cavity, trace oxygen contained in the input protection gas can be effectively intercepted, contact between the copper cable and oxygen is effectively avoided during the whole annealing process, the surface of the copper flat wire is ensured to be bright and clean, the product quality is improved, and a subsequent pickling process is saved.

Description

Technical Field

[0001] This invention belongs to the field of copper cable processing technology, and specifically discloses an apparatus for preparing copper flat wire by extruding copper cable. Background Technology

[0002] Copper flat wire, as an important conductive material, is widely used in the winding manufacturing of power equipment and electronic components such as transformers, motors, reactors, and high-current power distribution systems due to its large cross-sectional area, good heat dissipation performance, and ease of bending and installation. Its performance directly affects the efficiency, stability, and lifespan of the entire power system.

[0003] The traditional manufacturing process of copper flat wire usually includes two key steps: extrusion molding and annealing. After traditional annealing, the copper flat wire is at a high temperature and comes into contact with the outside air. The copper surface is easily oxidized, forming a copper oxide film, which increases the difficulty of subsequent processing.

[0004] Therefore, those skilled in the art have proposed an apparatus for preparing copper flat wires by extruding copper cables to solve the problems mentioned above. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide an apparatus for preparing copper flat wire by extrusion molding of copper cable, so as to solve the problem that the surface annealing treatment of copper flat wire in the prior art is prone to oxidation.

[0006] To achieve the above objectives, the present invention provides an apparatus for preparing copper flat wire by extrusion molding of copper cable, including a processing box, an extrusion mechanism provided on one side of the processing box, a connecting cavity opened inside the processing box, inlet holes opened on both sides of the processing box, and an annealing module provided inside the connecting cavity. The annealing module includes three partitions fixedly connected to the inner wall of the connecting cavity. The three partitions divide the interior of the connecting cavity from left to right into a preheating cavity, a heating cavity, a slow cooling cavity, and a rapid cooling cavity. The heating cavity is equipped with a heating component.

[0007] In the above technical solution, preferably, the bottom of the processing box is provided with an exhaust pipe that communicates with the preheating chamber, and the exhaust pipe is provided with a pressure relief valve.

[0008] In the above technical solution, preferably, the bottom of the processing box is provided with three air pumps that are evenly distributed. The air pumps have an air inlet connected to an outlet pipe, and the three outlet pipes are respectively connected to the heating chamber, the slow cooling chamber and the rapid cooling chamber.

[0009] In the above technical solution, preferably, the inner top walls of the preheating chamber, heating chamber, slow cooling chamber and rapid cooling chamber are all fixedly connected with diversion pipes, and the bottom of the diversion pipes are connected to uniformly distributed nozzles.

[0010] In the above technical solution, preferably, the outlet ends of the three air pumps are all connected to connecting pipes, and the other ends of the three connecting pipes are respectively connected to the diversion pipes in the preheating chamber, heating chamber, and slow cooling chamber from left to right.

[0011] In the above technical solution, preferably, the rapid cooling chamber is provided with a cooling pipe, the cooling pipe is spirally arranged, and both ends of the cooling pipe extend out of the processing box, the cooling pipe is used for the transportation of coolant.

[0012] In the above technical solution, preferably, an air inlet pipe is provided on the top of the processing box, and the lower end of the air inlet pipe is connected to the diversion pipe in the rapid cooling chamber. The air inlet pipe is used to protect the input of gas.

[0013] In the above technical solution, preferably, the surface of the connecting pipe is connected to a connecting shell, and the interior of the connecting shell is provided with an oxygen molecular sieve.

[0014] In the above technical solution, preferably, the heating component includes a mounting frame disposed inside the heating cavity, an induction coil uniformly distributed on the inner side of the mounting frame, a connecting plate uniformly distributed on the surface of the mounting frame, and the other end of the connecting plate being fixedly connected to the inner wall of the heating cavity.

[0015] In the above technical solution, preferably, the extrusion mechanism includes two mounting plates fixedly connected to the surface of the processing box, and three extrusion rollers arranged in a V-shape are rotatably connected between the two mounting plates. The surface of the extrusion rollers is provided with uniformly distributed extrusion grooves. A connecting block located inside the extrusion grooves is fixedly connected to the surface of the processing box. The inner wall of the connecting block is in contact with the inner wall of the extrusion groove. A rotating roller located below the extrusion rollers and in contact with the surface of the extrusion rollers is rotatably connected between the two mounting plates.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up an annealing module and a processing chamber, a closed protective gas circulation system with an internal pressure higher than the external pressure can be constructed. An oxygen molecular sieve is integrated to provide double protection against oxidation during the copper cable annealing process. High-purity nitrogen is injected from the inlet pipe to form an inert environment in the rapid cooling chamber. Secondly, residual oxygen in the circulating gas can be filtered by the oxygen molecular sieve during its flow through each chamber, effectively trapping trace amounts of oxygen in the input protective gas. This effectively prevents the copper cable from coming into contact with oxygen during the entire annealing process, ensuring the bright and clean surface of the copper flat wire, improving product quality and eliminating the need for subsequent acid washing.

[0017] 2. By setting up an annealing module and a processing box, a heat energy recovery and utilization mechanism can be realized. The protective gas driven by the air pump circulates in a counter-current manner between the rapid cooling chamber, the slow cooling chamber, the heating chamber, and the preheating chamber. The cooling capacity of the rapid cooling chamber is cleverly used for slow cooling, and the residual heat of the heating chamber and the slow cooling chamber is used to preheat the copper cable that has just entered. This achieves gradient heating and gradient cooling of the copper cable, avoiding internal stress or grain defects caused by excessive temperature difference, improving the mechanical properties and consistency of the product, and effectively recovering and utilizing the heat and cold energy inside the system. This effectively reduces the energy consumption of the heating component for cooling and refrigeration, achieving the goal of energy saving and efficiency improvement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial cross-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the extrusion mechanism of the present invention; Figure 4 This is a cross-sectional schematic diagram of the processing box of the present invention; Figure 5 This is a schematic diagram of the heating assembly of the present invention; Figure 6 This is a schematic diagram showing the distribution of the air pump, connecting pipe, outlet pipe, connecting shell, and oxygen molecular sieve of the present invention. Figure 7 This is a schematic diagram showing the distribution of the extrusion groove and extrusion roller of the present invention; Figure 8 This is a schematic diagram of the connecting block of the present invention.

[0019] In the diagram: 1. Processing box; 101. Connecting cavity; 102. Inlet hole; 2. Extrusion mechanism; 201. Mounting plate; 202. Extrusion roller; 203. Rotating roller; 204. Extrusion groove; 205. Connecting block; 3. Annealing module; 301. Partition plate; 302. Cooling pipe; 303. Air inlet pipe; 304. Diverter pipe; 305. Connecting pipe; 306. Exhaust pipe; 307. Mounting frame; 308. Induction coil; 309. Connecting plate; 310. Air pump; 311. Outlet pipe; 312. Connecting shell; 313. Nozzle; 314. Oxygen molecular sieve. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0022] like Figures 1-6 The apparatus shown is for preparing copper flat wire by extruding copper cable, including a processing box 1, an extrusion mechanism 2 is provided on one side of the processing box 1, a connecting cavity 101 is provided inside the processing box 1, and inlet holes 102 are provided on both sides of the processing box 1. An annealing module 3 is provided inside the connecting cavity 101. The annealing module 3 includes three partitions 301 fixedly connected to the inner wall of the connecting cavity 101. The three partitions 301 divide the interior of the connecting cavity 101 from left to right to form a preheating cavity, a heating cavity, a slow cooling cavity and a rapid cooling cavity. The heating cavity is equipped with a heating component.

[0023] Preferably, each of the partitions 301 has a through hole for the copper cable to pass through. The through hole is coaxially arranged with the inlet hole 102. That is, the three partitions 301 divide the interior of the connecting cavity 101 from left to right to form a preheating cavity, a heating cavity, a slow cooling cavity and a fast cooling cavity that are connected in sequence.

[0024] The copper cable that needs to be processed passes through the extrusion mechanism 2 and the inlet hole 102 on one side, enters the connection cavity 101, is annealed by the annealing module 3, and is then exported through the inlet hole 102 on the other side. Specifically, the annealed copper cable is wound up and stored by a winding mechanism, which can be a conventional winding device in the art.

[0025] like Figures 1-6 As shown, the bottom of the processing box 1 is provided with an exhaust pipe 306 that is connected to the preheating chamber, and a pressure relief valve is provided inside the exhaust pipe 306.

[0026] The pressure relief valve ensures that the air pressure inside the connection cavity 101 exceeds a preset threshold before venting, maintaining a positive pressure environment inside the cavity and preventing external oxygen from entering. The inlet hole 102 is blocked by the copper cable through which it passes, so less gas leaks from there. Furthermore, the pressure relief valve ensures that the air pressure inside the connection cavity 101 is greater than the external air pressure, which can ensure that external air enters the connection cavity 101 from the outside and reduce the amount of oxygen entering the connection cavity 101.

[0027] The bottom of the processing box 1 is equipped with three evenly distributed air pumps 310. The air inlet end of the air pump 310 is connected to the outlet pipe 311. The three outlet pipes 311 are respectively connected to the heating chamber, the slow cooling chamber and the rapid cooling chamber.

[0028] The inner top walls of the preheating chamber, heating chamber, slow cooling chamber and rapid cooling chamber are all fixedly connected with a diversion pipe 304, and the bottom of the diversion pipe 304 is connected to a uniformly distributed nozzle 313.

[0029] Preferably, the diversion pipe 304 is connected to a plurality of nozzles 313, which are evenly distributed along the length of the diversion pipe 304.

[0030] The outlets of the three air pumps 310 are all connected to connecting pipes 305, and the other ends of the three connecting pipes 305 are connected from left to right to the distribution pipes 304 in the preheating chamber, heating chamber, and slow cooling chamber, respectively.

[0031] The rapid cooling chamber is equipped with a cooling pipe 302, which is spirally arranged and both ends of the cooling pipe 302 extend out of the processing box 1. The cooling pipe 302 is used for the transportation of coolant. Preferably, the cooling pipe is a spiral cooling sleeve, and a copper cable is inserted inside the cooling sleeve. The gap between the cooling sleeve and the copper cable forms a coolant flow channel.

[0032] An air inlet pipe 303 is provided on the top of the processing box 1. The lower end of the air inlet pipe 303 is connected to the diversion pipe 304 in the rapid cooling chamber. The air inlet pipe 303 is used to protect the input of gas.

[0033] The surface of the connecting pipe 305 is connected to the connecting shell 312, that is, the connecting pipe 305 is connected through the connecting shell 312; the interior of the connecting shell 312 is provided with an oxygen molecular sieve 314.

[0034] Preferably, a connecting shell 312 is connected in series in the connecting pipe 305, and the connecting shell 312 is filled with an oxygen molecular sieve 314. The connecting shell 312 is detachably connected to the connecting pipe 305 to facilitate the replacement of the oxygen molecular sieve.

[0035] Preferably, the connecting shell 312 is detachably connected to the connecting pipe 305 for periodic replacement or regeneration of the gas molecular sieve.

[0036] The inlet pipe 303 introduces protective gas into the diversion pipe 304 inside the rapid cooling chamber, and finally discharges it into the interior of the rapid cooling chamber through the nozzle 313. The protective gas is high-purity nitrogen. The cooling pipe 302 delivers coolant, and the copper cable passes through the inside of the cooling pipe 302. During this process, the temperature of the copper cable is rapidly cooled. The gas delivery accelerates the contact between the coolant and the copper cable during the flow of coolant in the cooling pipe 302, thereby reducing the surface temperature of the copper cable. The protective gas inside the rapid cooling chamber is drawn into the connecting pipe through the outlet pipe 311 by the rightmost air pump 310. Inside 305, during this process, the oxygen molecular sieve 314 can further trap oxygen in the transported gas to prevent oxygen from contacting the heated copper cable. The gas inside the connecting pipe 305 can be introduced into the diversion pipe 304 in the slow cooling chamber and cooled down the copper cable inside the slow cooling chamber through the nozzle 313 (because it absorbs the temperature of the copper cable surface in the rapid cooling chamber, the gas temperature is higher than the temperature inside the rapid cooling chamber), thereby achieving the purpose of slow cooling of the copper cable in the rapid cooling chamber, thus achieving the effect of stepped cooling and avoiding excessive temperature difference from affecting the product quality of the copper cable.

[0037] The gas inside the slow cooling chamber is introduced into the heating chamber through the air pump 310, outlet pipe 311 and connecting pipe 305 below it, further absorbing the residual heat in the heating chamber to increase the gas temperature. Since the copper cable carries a lot of heat when it enters the slow cooling chamber after heating and annealing, the temperature of the gas introduced into the heating chamber will not affect the normal use of heating and annealing. After further absorbing the residual heat in the heating chamber, the gas is introduced into the diversion pipe 304 inside the preheating chamber through the lower air pump 310, the outlet pipe 311 and the connecting pipe 305, and sprayed out through the nozzle 313. This can preheat the copper cable entering the preheating chamber, thereby achieving the purpose of stepped heating and reducing the energy consumption of the heating component. The partition 301 effectively isolates the direct connection between each chamber and the outside world, and outside air can only enter the interior of the processing chamber 1 through the inlet hole 102. As protective gas is continuously introduced into the processing chamber 1, the interior of the processing chamber 1 is kept under positive pressure, preventing outside air from entering through the inlet hole 102, thus forming a sealed anti-oxidation processing space.

[0038] like Figures 1-6 As shown, the heating assembly includes a mounting frame 307 disposed inside the heating chamber. Induction coils 308 are uniformly distributed on the inner side of the mounting frame 307. Preferably, the induction coils 308 are wound around the inner wall of the mounting frame 307. A connecting plate 309 is uniformly distributed and fixedly connected to the surface of the mounting frame 307. The other end of the connecting plate 309 is fixedly connected to the inner wall of the heating chamber.

[0039] The copper cable can pass through the center of the induction coil 308. By activating the induction coil 308, the alternating magnetic field generates eddy currents inside the copper cable, which heats up and achieves the effect of heating and annealing.

[0040] like Figures 1-6 As shown, the extrusion mechanism 2 includes two mounting plates 201 fixedly connected to the surface of the processing box 1. Three extrusion rollers 202 arranged in a V-shape are rotatably connected between the two mounting plates 201. The surface of the extrusion rollers 202 is provided with uniformly distributed extrusion grooves 204. A connecting block 205 located inside the extrusion groove 204 is fixedly connected to the surface of the processing box 1. The inner wall of the connecting block 205 is in contact with the inner wall of the extrusion groove 204, that is, the inner wall of the connecting block 205 is in sliding fit with the inner wall of the extrusion groove 204, and a gap is formed between the two to allow the extrusion rollers 202 to rotate relative to each other. A rotating roller 203 located below the extrusion rollers 202 and in contact with the surface of the extrusion rollers 202 is rotatably connected between the two mounting plates 201. The extrusion rollers 202 can rotate on their own, and the inner side of the connecting block 205 will not affect the rolling of the extrusion rollers 202.

[0041] The connecting block 205 and the extrusion groove 204 are matched to guide the copper cable. However, during the use of the copper cable, the friction will cause the extrusion roller 202 and the rotating roller 203 to rotate. The sliding connection between the connecting block 205 and the inner wall of the extrusion groove 204 will not affect the rotation of the extrusion roller 202. At the same time, the extrusion groove 204 is used to extrude and form the copper cable.

[0042] The copper cable passes through the extrusion grooves 204 on the three extrusion rollers 202 in sequence. During this process, the connecting block 205 can guide it and reduce its bending degree. The opening width of the three extrusion grooves 204 gradually decreases from left to right to avoid the large tension required for one extrusion molding. Dividing it into three pressure segments can effectively reduce energy consumption.

[0043] Preferably, the three extrusion rollers 202 are arranged in a V-shape with the V-shaped opening facing the copper cable input direction, and the width of the three extrusion grooves 204 decreases gradually along the copper cable conveying direction.

[0044] Working principle: The copper cable to be processed is passed through the extrusion mechanism 2 and the inlet hole 102 on one side into the connecting cavity 101. After being annealed by the annealing module 3, it is then discharged through the inlet hole 102 on the other side. During this process, protective gas is introduced into the diversion pipe 304 inside the rapid cooling chamber through the air inlet pipe 303, and finally discharged into the rapid cooling chamber through the nozzle 313. The protective gas is high-purity nitrogen. The cooling pipe 302 can deliver coolant. At the same time, the copper cable passes through the inside of the cooling pipe 302. During this process, the temperature of the copper cable can be rapidly cooled. The gas delivery accelerates the contact between the coolant and the copper cable during the flow of coolant in the cooling pipe 302, thereby reducing the surface temperature of the copper cable. The protective gas inside the rapid cooling chamber is drawn into the connecting pipe 305 through the outlet pipe 311 by the air pump 310 on the far right. During this process, oxygen... The molecular sieve 314 can further trap oxygen in the transported gas to prevent oxygen from contacting the heated copper cable. The gas inside the connecting pipe 305 can be introduced into the diversion pipe 304 in the slow cooling chamber and cooled by the nozzle 313 (because it absorbs the temperature of the copper cable surface in the rapid cooling chamber, the gas temperature is higher than the temperature inside the rapid cooling chamber), thereby achieving the purpose of slow cooling of the copper cable in the rapid cooling chamber, thus achieving the effect of stepped cooling and avoiding excessive temperature difference from affecting the product quality of the copper cable. The gas, after absorbing the residual heat in the heating chamber, is introduced into the diversion pipe 304 in the preheating chamber through the air pump 310, the outlet pipe 311 and the connecting pipe 305 below and sprayed out by the nozzle 313, which can preheat the copper cable entering the preheating chamber, thereby achieving the purpose of stepped heating and reducing the energy consumption of the heating component.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An apparatus for preparing copper flat wire by extrusion molding of copper cable, comprising a processing box (1), characterized in that, A pressing mechanism (2) is provided on one side of the processing box (1), a connecting cavity (101) is provided inside the processing box (1), and inlet holes (102) are provided on both sides of the processing box (1). An annealing module (3) is provided inside the connecting cavity (101). The annealing module (3) includes three partitions (301) fixedly connected to the inner wall of the connecting cavity (101). The three partitions (301) divide the interior of the connecting cavity (101) from left to right to form a preheating cavity, a heating cavity, a slow cooling cavity and a rapid cooling cavity. The heating cavity is equipped with a heating component. The bottom of the processing box (1) is provided with three air pumps (310) evenly distributed. The air pump (310) has an air inlet end connected to an outlet pipe (311). The three outlet pipes (311) are respectively connected to the heating chamber, the slow cooling chamber and the fast cooling chamber. The inner top walls of the preheating chamber, heating chamber, slow cooling chamber and rapid cooling chamber are all fixedly connected with a diversion pipe (304), and the bottom of the diversion pipe (304) is connected to a uniformly distributed nozzle (313). The outlet ends of the three air pumps (310) are all connected to connecting pipes (305), and the other ends of the three connecting pipes (305) are connected from left to right to the branch pipes (304) in the preheating chamber, heating chamber and slow cooling chamber respectively; The rapid cooling chamber is equipped with a cooling pipe (302), which is spirally arranged and has both ends extending out of the processing box (1). The cooling pipe (302) is used for the transport of coolant.

2. The apparatus for preparing copper flat wire by extrusion molding of copper cable according to claim 1, characterized in that, The bottom of the processing box (1) is provided with an exhaust pipe (306) that is connected to the preheating chamber, and a pressure relief valve is provided inside the exhaust pipe (306).

3. The apparatus for preparing copper flat wire by extrusion molding of copper cable according to claim 2, characterized in that, The top of the processing box (1) is provided with an air inlet pipe (303), the lower end of which is connected to the diversion pipe (304) in the rapid cooling chamber. The air inlet pipe (303) is used to protect the input of gas.

4. The apparatus for preparing copper flat wire by extrusion molding of copper cable according to claim 3, characterized in that, The surface of the connecting tube (305) is connected to the connecting shell (312), and the interior of the connecting shell (312) is provided with an oxygen molecular sieve (314).

5. The apparatus for preparing copper flat wire by extrusion molding of copper cable according to claim 4, characterized in that, The heating assembly includes a mounting frame (307) disposed inside the heating chamber. The inner side of the mounting frame (307) is provided with uniformly distributed induction coils (308). The surface of the mounting frame (307) is fixedly connected with uniformly distributed connecting plates (309). The other end of the connecting plates (309) is fixedly connected to the inner wall of the heating chamber.

6. The apparatus for preparing copper flat wire by extrusion molding of copper cable according to claim 5, characterized in that, The extrusion mechanism (2) includes two mounting plates (201) fixedly connected to the surface of the processing box (1), and three extrusion rollers (202) arranged in a V-shape are rotatably connected between the two mounting plates (201).

7. The apparatus for preparing copper flat wire by extrusion molding of copper cable according to claim 6, characterized in that, The surface of the extrusion roller (202) is provided with uniformly distributed extrusion grooves (204), and the surface of the processing box (1) is fixedly connected with a connecting block (205) located inside the extrusion groove (204), and the inner wall of the connecting block (205) is in contact with the inner wall of the extrusion groove (204).

8. The apparatus for preparing copper flat wire by extrusion molding of copper cable according to claim 7, characterized in that, A rotating roller (203) located below the extrusion roller (202) and in contact with the surface of the extrusion roller (202) is rotatably connected between the two mounting plates (201).

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