A conductor annealing uniform heating device capable of optimizing cable performance

Abstract

The utility model provides a kind of conductor annealing even heating device capable of optimizing cable performance, it is related to cable production device technical field, including horizontal annealing furnace, fixed heating pipe and the rotating heating piece of being sleeved in heating pipe outside;Conductor to be annealed passes through from fixed heating pipe, rotating heating piece is driven by motor and rotates around heating pipe, to carry out 360 degrees even heating to conductor, the utility model aims at solving the problem that uneven heat field distribution leads to uneven heating of conductor circumference, inconsistent annealing effect and finally affects the overall performance of cable in prior art using fixed heating source. The device is good in heating uniformity, can ensure that conductor obtains consistent mechanical and electrical properties, and effectively optimizes cable product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of cable production equipment, specifically to a conductor annealing uniform heating device that can optimize cable performance. Background Technology

[0002] In the manufacturing process of wires and cables, metal conductors (such as copper and aluminum) usually need to undergo a wire drawing process, which involves stretching them from a relatively thick wire blank to the required fine wire diameter using a die. This process causes drastic deformation of the internal crystal lattice of the metal material, resulting in a phenomenon called "work hardening." Although the strength of the conductor increases after work hardening, its toughness and ductility decrease significantly, making it harder and more brittle.

[0003] Using such a hard and brittle conductor directly to manufacture cables would cause several problems: First, the cable would lack flexibility and be difficult to bend, causing significant inconvenience to subsequent production, transportation, wiring, and installation. Second, repeated bending could easily lead to metal fatigue or even breakage, severely affecting the cable's electrical performance, reliability, and lifespan. To eliminate the adverse effects of work hardening and restore the conductor's flexibility and toughness, annealing is necessary.

[0004] Existing conductor annealing devices typically use a fixed heating source (such as resistance wire or infrared lamp) to heat the conductor path. However, this fixed heating method has inherent drawbacks: due to the heat distribution of the heating source itself and deviations in its installation position, it is difficult to ensure that the conductor is heated completely uniformly in the circumferential direction. This easily leads to the formation of localized "hot spots" with excessively high temperatures and "cold spots" with excessively low temperatures on the conductor surface, resulting in inconsistent annealing effects throughout the conductor and ultimately affecting the overall performance uniformity of the finished cable. Furthermore, the conductor will oxidize when exposed to air at high temperatures, affecting its conductivity and surface quality, and some existing devices are insufficiently protective against this. Utility Model Content

[0005] To overcome the problems in the prior art, this utility model provides a conductor annealing uniform heating device that can optimize cable performance, solving the problems of uneven heating and easy oxidation of conductors in existing fixed heating devices.

[0006] A conductor annealing uniform heating device that optimizes cable performance includes a horizontal annealing furnace, a heating tube, a rotary heating element, a motor, an electric slip ring, and a control system. The horizontal annealing furnace is an insulated shell. The heating tube is coaxially installed inside the horizontal annealing furnace, with both ends extending out of the furnace. Conductor inlet holes and conductor holes are respectively opened at both ends of the heating tube to allow conductors to pass through. The rotary heating element is rotatably installed around the heating tube inside the horizontal annealing furnace. The motor is installed outside the furnace, and its power output end is connected to the power input end of the rotary heating element. The rotary heating element is connected to an external power source and control system for electrical energy and signal transmission via the electric slip ring.

[0007] Furthermore, the heating tube is a ceramic or quartz tube.

[0008] Furthermore, the rotary heating element includes a heat source, a heating rotor, a supporting stator, and a rotating gear. The heating rotor is rotatably mounted to one side wall of the horizontal annealing furnace via the inner end of the supporting stator and a bearing. The heat source is uniformly mounted on the heating rotor inside the horizontal annealing furnace. The rotating gear is fixedly mounted on the heating rotor outside the horizontal annealing furnace. The outer end of the supporting stator is fixedly mounted to a support outside the horizontal annealing furnace. One end of the heating tube extends out of the horizontal annealing furnace through the supporting stator.

[0009] Furthermore, the heat source is a high-frequency induction heating source or an infrared radiation heating source.

[0010] Furthermore, the slip ring includes a conductive ring and a brush. The conductive ring is coaxially mounted on the heating rotor and connected to a heat source, while the brush is mounted on the supporting stator and connected to an external power supply and control system.

[0011] Furthermore, the heating tube is provided with a protective gas inlet and a protective gas outlet at both ends, the protective gas inlet is connected to an inert gas source, and the protective gas outlet is connected to a recovery device.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The rotating heating element is driven by a motor to rotate around a fixed heating tube, so that every point on the circumference of the conductor can receive heat evenly over time during the conductor's movement. This completely eliminates "hot spots" and "cold spots" caused by uneven distribution of the heating source or individual differences, ensuring a highly uniform temperature of the conductor cross-section and consistent annealing effect.

[0013] 2. Due to the uniform annealing, the produced conductor has uniform flexibility and toughness throughout the entire length and circumference of the cable, and its mechanical and electrical properties are stable and reliable, thus significantly optimizing the quality and service life of the final cable product.

[0014] 3. By introducing protective gas into the heating tube, the conductor is isolated from oxygen in the high-temperature annealing zone, which effectively prevents surface oxidation and ensures the conductivity and smoothness of the conductor. Attached Figure Description

[0015] To clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are explained.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0017] Reference numerals: 1-Horizontal annealing furnace, 2-Heating tube, 21-Conductor inlet, 22-Conductor outlet, 23-Protective gas inlet, 24-Protective gas outlet, 3-Rotary heating element, 31-Heat source, 32-Heating rotor, 33-Supporting stator, 34-Rotary gear, 4-Motor, 5-Electric slip ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0019] See Figure 1 and Figure 2 The present invention provides a conductor annealing uniform heating device that can optimize cable performance. It mainly includes a horizontal annealing furnace 1, a heating tube 2 that runs through the furnace body coaxially, a set of rotatable rotating heating elements 3 around the heating tube 2, a motor 4 that drives the rotating heating elements 3 to rotate and is installed outside the horizontal annealing furnace 1, and an electric slip ring 5 and an overall control system are also provided to supply power to the rotating heating elements 3 and transmit control signals. The horizontal annealing furnace 1 has a shell with good heat preservation performance. It adopts a double-layer stainless steel shell with high-temperature resistant heat preservation materials such as ceramic fiber in the middle to reduce heat loss and improve energy efficiency. The heating tube 2 is a hollow pipe whose axis coincides with the axis of the horizontal annealing furnace 1. It is fixed and extends out of the furnace body at both ends, and is provided with conductor inlet hole 21 and conductor outlet hole 22, respectively, for guiding one or more conductors to be annealed to pass through continuously. In order to meet the requirements of high temperature resistance and electrical insulation, the heating tube 2 in this embodiment is preferably a ceramic tube or a quartz glass tube. These two materials are chemically stable, will not react with the conductor at high temperature, and can withstand the high temperature required for annealing.

[0020] See Figure 3 The rotating heating element 3 is a component for achieving uniform heating. It includes multiple heat sources 31, a hollow heating rotor 32, a supporting stator 33, and a rotating gear 34. The supporting stator 33 is a fixed component, with one end fixed to a support outside the furnace body and the other end extending into the furnace body for coaxial support and fixation of the heating tube 2. The heating rotor 32 is a hollow cylinder that is rotatably mounted inside the furnace body via bearings and sleeved on the outside of the supporting stator 33. One end of the heat sources 31 is evenly distributed and fixed on the inner wall of the heating rotor 32, and the other end is fixed to an annular rotating bearing installed on the opposite side of the horizontal annealing furnace 1. The rotating gear 34 is fixed to the end of the heating rotor 32 that extends out of the furnace body and meshes with the output gear of the motor 4, thereby driving the entire heating rotor 32, together with the heat sources 31 on it, to rotate around the fixed heating tube 2. The heat sources 31 can be multiple sets of infrared radiation heating lamps or high-frequency induction heating coils to achieve efficient non-contact heating. The slip ring 5 includes a conductive ring that rotates with the heating rotor 32 and a stationary brush. The brush is mounted on the supporting stator 33 and connected to an external power supply and control system. The conductive ring and the brush maintain sliding contact and stably transmit electrical energy and signals to the heat source 31.

[0021] Referring to the figure, in order to prevent the conductor from being oxidized during high-temperature annealing, protective gas inlet 23 and protective gas outlet 24 are respectively provided at both ends of the heating tube 2. Protective gas inlet 23 is connected to an external inert gas source, such as nitrogen or argon, while protective gas outlet 24 is connected to a recovery or processing device.

[0022] Work process: Preparation phase: First, start the control system and start motor 4. Motor 4 drives the heating rotor 32 to start rotating at the set speed via rotating gear (34); At the same time, the control system supplies power to the heat source 31 on the rotating heating element 3 through the electric slip ring 5, and begins to preheat the internal space of the heating tube 2 until the process temperature required for conductor annealing is reached and maintained stably. During or after preheating, an inert protective gas (such as nitrogen) is continuously introduced into the heating tube 2 from the protective gas inlet 23 to expel the air in the tube and establish and maintain an oxygen-free or low-oxygen protective atmosphere to prevent the subsequent conductors from oxidizing at high temperatures.

[0023] Production stage: After the furnace temperature and protective atmosphere have reached and stabilized at the process set values, one or more conductors to be annealed are sent out from the previous process of the production line, so that they continuously pass through the conductor inlet 21 of the heating tube 2 and enter the heating zone. The continuously moving conductor is heated uniformly in all directions in 360 degrees by a heat source 31 that rotates around it at high speed in the heating tube 2 filled with protective gas, reaching the annealing temperature and holding it for a certain time, thereby completely eliminating work hardening and restoring its softness and toughness. The annealed conductor passes through conductor exit hole 22 and then enters the subsequent cooling and winding process. The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A conductor annealing uniform heating device that optimizes cable performance, characterized in that, The system includes a horizontal annealing furnace (1), a heating tube (2), a rotary heating element (3), a motor (4), an electric slip ring (5), and a control system. The horizontal annealing furnace (1) is an insulated shell. The heating tube (2) is coaxially installed inside the horizontal annealing furnace (1). The two ends of the heating tube (2) extend out of the two ends of the horizontal annealing furnace (1). Conductor inlet holes (21) and conductor holes (22) are opened at the two ends of the heating tube (2) to allow conductors to pass through. The rotary heating element (3) is rotatably installed around the heating tube (2) inside the horizontal annealing furnace (1). The motor (4) is installed outside the horizontal annealing furnace (1). The power output end of the motor (4) is connected to the power input end of the rotary heating element (3). The rotary heating element (3) is connected to the external power supply and control system through the electric slip ring (5) for electrical energy and signal connection.

2. The conductor annealing uniform heating device for optimizing cable performance according to claim 1, characterized in that, The heating tube (2) is a ceramic or quartz tube.

3. The conductor annealing uniform heating device for optimizing cable performance according to claim 1, characterized in that, The rotating heating element (3) includes a heat source (31), a heating rotor (32), a support stator (33), and a rotating gear (34). The heating rotor (32) is rotatably mounted on one side wall of the horizontal annealing furnace (1) through the inner end of the support stator (33) and the bearing. The heat source (31) is evenly mounted on the heating rotor (32) inside the horizontal annealing furnace (1). The rotating gear (34) is fixedly mounted on the heating rotor (32) outside the horizontal annealing furnace (1). The outer end of the support stator (33) is fixedly mounted on the support outside the horizontal annealing furnace (1). One end of the heating tube (2) passes through the support stator (33) and extends out of the horizontal annealing furnace (1).

4. The conductor annealing uniform heating device for optimizing cable performance according to claim 3, characterized in that, The heat source (31) is a high-frequency induction heating source or an infrared radiation heating source.

5. The conductor annealing uniform heating device for optimizing cable performance according to claim 3, characterized in that, The slip ring (5) includes a conductive ring and a brush. The conductive ring is coaxially mounted on the heating rotor (32) and connected to the heat source (31). The brush is mounted on the supporting stator (33) and connected to the external power supply and control system.

6. The conductor annealing uniform heating device for optimizing cable performance according to claim 1, characterized in that, The heating tube (2) is provided with a protective gas inlet (23) and a protective gas outlet (24) at both ends. The protective gas inlet (23) is connected to an inert gas source, and the protective gas outlet (24) is connected to a recovery device.

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