Wire and cable drawing and annealing device and method

Abstract

The invention belongs to the technical field of wire and cable processing, and discloses a wire and cable drawing annealing device and method.The wire and cable drawing annealing device comprises an annealing box, a heating device, a cooling device and a circulating device.The heating device comprises an outer cover and a pair of electrode wheels, and the outer cover is connected to the inner wall of the annealing box; heat generated by the electrode wheel is not only used for heating the copper wire, but also efficiently conducted to cooling water at the bottom of the cover body by means of the heat conduction cover body, so that the heat is instantaneously evaporated to form a coated steam layer, and anti-oxidation treatment on the surface of the copper wire is achieved; meanwhile, the annealed copper wire enters a cooling tank to be subjected to segmented spray cooling, surface impurities are effectively removed, rapid cooling is achieved, and it is ensured that the copper wire structure is uniform and the surface is clean; cooling water in the device is collected and filtered and then is fed into the bottom of the cover body again through the circulating water tank to form closed-loop circulation, energy conservation and emission reduction are achieved, the heat efficiency and the automation degree are improved, and the device has the multiple advantages of being resistant to oxidation, fast in cooling, compact in structure, stable in operation and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of wire and cable processing, and particularly to a wire and cable drawing and annealing device and method. Background Art

[0002] During the wire drawing process of metal wires, due to strong plastic deformation, the grain structure undergoes work hardening, resulting in a decrease in electrical conductivity and flexibility. Therefore, annealing treatment is required after forming. In existing industrial production, the electrode wheel annealing method is widely used. By heating through the contact resistance between the electrode wheel and the conductor, the wire is heated to the recrystallization temperature to achieve online continuous annealing. After annealing treatment, in order to quickly reduce the temperature of the wire, it is usually necessary to perform rapid cooling through a cooling water tank to complete the transformation from the high-temperature state to the stable state, preventing uneven organization or surface damage.

[0003] Although electrode heating annealing has good processing efficiency, when exposed to the air environment at high temperature, the surface of the metal conductor is extremely prone to oxidation, which affects its electrical conductivity, welding performance, and appearance quality. To alleviate this problem, some solutions introduce a steam protection system, which uses water vapor to form a gas coating layer in the heating area to isolate the air.

[0004] However, most of these systems rely on external independent heating sources or steam equipment, with a complex overall structure and high energy consumption. At the same time, if the large amount of circulating water used in the annealing and cooling process does not fully utilize its temperature gradient, it may cause energy waste and reduce the overall energy efficiency of the system. Currently, there is still a lack of an integrated annealing device with a compact structure, high energy utilization rate, and capable of efficiently coordinating the annealing, oxygen inhibition, and cooling processes. Summary of the Invention

[0005] The present invention aims to provide a wire and cable drawing and annealing device and method to solve the problems proposed in the above background art. The present invention provides a wire and cable drawing and annealing device and method with high structural integration and excellent energy utilization efficiency. By not only using the heat generated by the electrode wheel to heat the copper wire, but also efficiently conducting the heat to the cooling water at the bottom of the cover through a heat conduction cover body, enabling it to instantaneously evaporate to form a coating steam layer to achieve anti-oxidation treatment of the copper wire surface; at the same time, using the copper wire to enter the cooling tank for segmented spray cooling after annealing to effectively remove surface impurities and quickly cool down, ensuring uniform copper wire structure and clean surface; the cooling water in the device is collected, filtered and re-fed into the bottom of the cover by a circulating water tank to form a closed-loop cycle, which not only saves energy and reduces emissions, but also improves the thermal efficiency and automation degree, and has multiple advantages such as anti-oxidation, fast cooling, compact structure, and stable operation.

[0006] To achieve the above object, the present invention provides the following technical solutions: A wire and cable drawing and annealing device and method, comprising an annealing box, a heating device, a cooling device and a circulating device. The heating device includes an outer cover and a pair of electrode wheels. The outer cover is connected to the inner wall of the annealing box and is made of a heat-conducting material. Through holes are provided at both ends of the outer cover. The electrode wheels are driven by a motor to rotate and are located inside the outer cover. The motor is connected to the outer cover. A first drain hole is provided on one side of the bottom end of the inner wall of the annealing box near its wire outlet. The cooling device includes a cooling tank. The cooling tank is connected to the inner wall of the annealing box, and a plurality of nozzles are connected to one end of the inner wall of the cooling tank. A first water pump connected to an external water source is connected to the annealing box. A plurality of the nozzles are all connected to the first water pump. One end of the cooling tank is connected to a circulating water tank, and a drainage hole is provided at one end of the inner wall of the cooling tank away from the nozzles. The drainage hole is connected to the circulating water tank. The circulating device includes a second water pump. The second water pump is connected to the inner cavity of the circulating water tank, and a water pipe is connected to the output end of the second water pump. One end of the water pipe away from the second water pump extends to the bottom of the inner cavity of the outer cover.

[0007] Preferably, a plurality of baffles are connected to the bottom end of the inner wall of the outer cover, and all the baffles are made of a heat-conducting material.

[0008] Preferably, the plurality of baffles are arranged in a staggered manner and are all arranged in an inclined structure.

[0009] Preferably, a plurality of first exhaust holes are provided at the top end of the outer cover.

[0010] Preferably, a pair of symmetrically arranged guide wheels are rotatably connected to the inner wall of the annealing box, and the pair of guide wheels are respectively located on both sides of the cooling tank.

[0011] Preferably, the plurality of nozzles are arranged at equal intervals along the direction of the inner cavity of the cooling tank.

[0012] Preferably, a filter screen is connected to the inner wall of the cooling tank, and the filter screen covers the drainage hole.

[0013] Preferably, the circulating water tank is made of a heat-insulating and heat-preserving material.

[0014] Preferably, a plurality of second drain holes are provided at the point of the annealing box, and a plurality of second exhaust holes are provided at the top end of the annealing box.

[0015] A wire and cable drawing and annealing method includes the following steps: S1, the copper wire enters through the wire inlet of the annealing box, enters the outer cover through the through hole on the outer cover, and then is respectively wound around a pair of electrode wheels. The motor drives the electrode wheels to rotate to convey the copper wire, and during the process, the electrode wheels realize resistance heating of the copper wire; In S2, the heat generated by the electrode wheel and the copper wire is conducted through the outer cover to the cooling water at the bottom end of the inner wall of the outer cover, causing the cooling water to evaporate. The generated steam covers the surface of the copper wire, and then the copper wire covered with water vapor and heated moves to the outside of the outer cover through the through hole; In S3, after the copper wire leaves the outer cover, it enters the inside of the cooling tank. The first water pump introduces external cooling water into the cooling tank through the nozzle to cool the copper wire, and the cooled copper wire leaves the annealing box through the wire outlet of the annealing box; In S4, the cooling water that has absorbed the heat of the copper wire inside the cooling tank enters the circulation water tank through the drainage hole, and then the second water pump re-introduces the cooling water with a certain temperature in the circulation water tank into the outer cover through the water pipe for evaporation.

[0016] Beneficial effects produced by this technical solution compared with the prior art: The present invention provides a wire and cable drawing and annealing device and method with high structural integration and excellent energy utilization efficiency. By using the heat generated by the electrode wheel not only to heat the copper wire, but also efficiently conducting the heat to the cooling water at the bottom of the cover through the heat-conducting cover body, enabling it to instantaneously evaporate to form a coating steam layer to achieve anti-oxidation treatment of the copper wire surface; at the same time, using the copper wire to enter the cooling tank for segmented spray cooling after annealing to effectively remove surface impurities and quickly cool down, ensuring uniform copper wire structure and clean surface; the cooling water in the device is collected, filtered and re-fed into the bottom of the cover by the circulation water tank to form a closed-loop cycle, which not only saves energy and reduces emissions, but also improves the thermal efficiency and automation degree, and has multiple advantages such as anti-oxidation, fast cooling, compact structure and stable operation. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the internal structure of the annealing box provided by the present invention; Figure 2 It is a schematic diagram of the structure of the cooling tank provided by the present invention; Figure 3 It is a schematic diagram of the internal structure of the outer cover provided by the present invention; Figure 4 It is a schematic flow chart provided by the present invention.

[0018] Reference numerals: 1. Annealing box; 2. Outer cover; 3. Electrode wheel; 4. Cooling tank; 5. First water pump; 6. Nozzle; 7. Circulation water tank; 8. Second water pump; 9. Water pipe; 10. First drain hole; 11. Baffle; 12. First exhaust hole; 13. Second drain hole; 14. Second exhaust hole; 15. Filter screen; 16. Guide wheel. Detailed Embodiments

[0019] The present invention will be further described in detail below with reference to the drawings and embodiments: As Figures 1-4A wire and cable drawing and annealing device and method are shown, including an annealing box 1, a heating device, a cooling device and a circulation device. The heating device includes an outer cover 2 and a pair of electrode wheels 3. The outer cover 2 is connected to the inner wall of the annealing box 1, and the outer cover 2 is made of a heat-conducting material. Through holes are opened at both ends of the outer cover 2. The electrode wheels 3 are driven by a motor to rotate, and the electrode wheels 3 are located inside the outer cover 2. The motor is connected to the outer cover 2. A first drain hole 10 is opened on one side of the bottom end of the inner wall of the annealing box 1 near its wire outlet. The cooling device includes a cooling tank 4. The cooling tank 4 is connected to the inner wall of the annealing box 1, and a plurality of nozzles 6 are connected to one end of the inner wall of the cooling tank 4. A first water pump 5 connected to an external water source is connected to the annealing box 1. A plurality of nozzles 6 are all connected to the first water pump 5. One end of the cooling tank 4 is connected to a circulation water tank 7, and a drainage hole is opened at one end of the inner wall of the cooling tank 4 away from the nozzles 6. The drainage hole is connected to the circulation water tank 7. The circulation device includes a second water pump 8. The second water pump 8 is connected to the inner cavity of the circulation water tank 7, and the output end of the second water pump 8 is connected to a water pipe 9. One end of the water pipe 9 away from the second water pump 8 extends to the bottom of the inner cavity of the outer cover 2.

[0020] During the wire drawing process of metal wires, due to strong plastic deformation, the grain structure undergoes work hardening, resulting in a decrease in electrical conductivity and flexibility. Therefore, annealing treatment is required after forming. In existing industrial production, the electrode wheel annealing method is widely used. By heating through the contact resistance between the electrode wheel and the conductor, the wire is heated to the recrystallization temperature to achieve online continuous annealing. After annealing treatment, in order to quickly reduce the temperature of the wire, it is usually necessary to perform rapid cooling through a cooling water tank to complete the transformation from the high-temperature state to the stable state and prevent uneven organization or surface damage.

[0021] In this solution, the annealing box 1, the heating device, the cooling device and the circulation device constitute the overall structural framework of the present invention. Among them, the heating device is used for annealing the copper wire, the cooling device is used to quickly reduce the temperature of the copper wire, and the circulation device realizes the recovery and reuse of cooling water, improving the energy efficiency of the system. The heating device mainly includes an outer cover 2 and a pair of electrode wheels 3. The outer cover 2 is fixedly arranged on the inner wall of the annealing box 1 to form a closed heating area. At the same time, its heat-conducting structure can transfer the heat dissipated by the electrode wheels 3 and the copper wire to the bottom cooling water, realizing the process of steam wrapping the copper wire. The electrode wheels 3 are driven by a motor to rotate and form a contact resistance through contact with the copper wire, and the copper wire is heated by using the "resistance heating" principle. This method belongs to a relatively mature online continuous annealing method in the prior art, which can quickly heat the copper wire to the recrystallization temperature, eliminate work hardening, and restore its ductility and electrical conductivity.

[0022] After the annealing process starts, the copper wire first enters from one end of the annealing box 1, passes through the inside of the outer cover 2 through the through holes provided at both ends of the outer cover 2, and winds around the electrode wheel 3. The electrode wheel 3 driven by the motor conveys the copper wire while performing resistance heating on it to make the copper wire reach the set temperature. When the copper wire passes through the bottom area of the outer cover 2 at high temperature, the outer cover 2 conducts heat to the water layer at its bottom, prompting the water to instantaneously vaporize and form steam to wrap the copper wire, preventing it from oxidizing and discoloring at high temperature. Then the copper wire leaves the outer cover 2 and enters the cooling device for rapid cooling. Then, the water after absorbing heat is collected through the circulation device and sent back into the outer cover 2 for re-evaporation, forming an efficient closed-loop water-heat circulation system. This design realizes the coordinated optimization of annealing, anti-oxidation, cooling, and circulation without additional heating burden, effectively improving the annealing quality and production efficiency.

[0023] A plurality of baffles 11 are connected to the bottom end of the inner wall of the outer cover 2. The plurality of baffles 11 are all made of heat-conducting materials, and the plurality of baffles 11 are arranged in a staggered manner and are all set to be inclined structures.

[0024] In this solution, the baffle 11 can effectively receive and conduct its own heat to the bottom cooling water layer, effectively increasing the heat exchange area with water, slowing down the water flow rate, significantly increasing the steam generation amount, and prompting the steam to better wrap the copper wire.

[0025] A plurality of first exhaust holes 12 are opened at the top end of the outer cover 2.

[0026] In this solution, the first exhaust holes 12 are used to timely discharge the remaining heat and part of the moisture in the steam that are not absorbed by the wire, preventing the water vapor in the outer cover 2 from being saturated or forming condensed water droplets attached to the copper wire, resulting in water stain marks or short-time cooling phenomena. This design keeps the air flow in the outer cover 2 smooth and is conducive to maintaining a stable high-temperature steam environment.

[0027] A pair of symmetrically arranged guide wheels 16 are rotatably connected to the inner wall of the annealing box 1. The pair of guide wheels 16 are respectively located on both sides of the cooling tank 4.

[0028] In this solution, the guide wheels 16 are used to define the movement path of the copper wire to ensure that it passes through the cooling tank 4 stably.

[0029] A plurality of nozzles 6 are arranged at equal intervals along the direction of the inner cavity of the cooling tank 4.

[0030] In this solution, the equal-spacing arrangement of the plurality of nozzles 6 ensures that the cooling water is evenly distributed on the surface of the copper wire, and will not cause local cooling or uneven structural stress after annealing due to inconsistent cooling intensity, thus affecting the performance of the copper wire. At the same time, the nozzles arranged in segments can achieve staged cooling, reduce thermal shock, and contribute to the stabilization process of the copper wire grains.

[0031] A filter screen 15 is connected to the inner wall of the cooling tank 4, and the filter screen 15 covers the drainage holes.

[0032] In this solution, spraying cooling water by the nozzle 6 can also play a role in flushing impurities on the surface of the copper wire. This is because during the previous wire drawing and resistance heating processes of the copper wire, a certain amount of oxide layer, tiny particles, lubrication residues, or metal chips shed during the processing will be generated on the surface. If these impurities are not removed in time, they will not only affect the surface quality of the cable and the adhesion of the insulating layer, but may also cause equipment wear or product defects during subsequent winding or coating processes. Therefore, flushing the surface of the wire through the nozzle during the cooling process can effectively carry away the attached impurities, improving the purity of the finished product and the process stability. The filter screen 15 is arranged in front of the drainage hole to intercept the flushed impurities, oxides, or metal debris, preventing them from entering the circulation water tank 7 with the water flow, causing pollution of the circulating water or blocking the second water pump 8. It can also concentrate the impurities in the cooling tank 4 for easy cleaning later.

[0033] The circulating water tank 7 is made of heat-insulating and heat-preserving materials.

[0034] In this solution, using heat-insulating and heat-preserving materials for the circulating water tank 7 can reduce the problem that the cooling water cools down too quickly in the circulating water tank 7 due to the decrease in ambient temperature, which helps to increase the initial temperature of the water, so that it can evaporate into steam more quickly after being introduced into the outer cover 2. This design not only improves the steam generation efficiency but also reduces the additional heat energy consumption required for heating the electrode wheel 3 and the copper wire.

[0035] The annealing box 1 is provided with a plurality of second drainage holes 13 at the bottom and a plurality of second exhaust holes 14 at the top.

[0036] In this solution, the second drainage holes 13 are used to drain the excess accumulated water during the cooling process or after the steam condenses, preventing liquid accumulation inside the annealing box 1. The second exhaust holes 14 assist in exhausting the moisture or waste heat generated during the operation of the system, improving the ventilation and heat dissipation effect of the entire annealing environment, and maintaining the stability and safety during the operation of the device.

[0037] A wire and cable drawing annealing method includes the following steps: S1, the copper wire enters through the inlet of the annealing box 1, enters the outer cover 2 through the through holes on the outer cover 2, and then is wound around a pair of electrode wheels 3 respectively. The motor drives the electrode wheels 3 to rotate to convey the copper wire, and during this process, the electrode wheels 3 perform resistance heating on the copper wire. S2, the heat generated by the electrode wheels 3 and the copper wire is conducted through the outer cover 2 to the cooling water at the bottom inner wall of the outer cover 2, causing the cooling water to evaporate. The generated steam covers the surface of the copper wire, and then the copper wire covered with heated steam moves to the outside of the outer cover 2 through the through holes. S3, after the copper wire leaves the outer cover 2, it enters the inside of the cooling tank 4. The first water pump 5 introduces external cooling water into the cooling tank 4 through the nozzle for cooling the copper wire, and the cooled copper wire leaves the annealing box 1 through the outlet of the annealing box 1. In S4, the cooling water that has absorbed the heat of the copper wire inside the cooling tank 4 enters the circulation water tank 7 through the diversion holes, and then the second water pump 8 re-introduces the cooling water with a certain temperature in the circulation water tank 7 into the outer cover 2 through the water pipe 9 for evaporation.

[0038] The above are only embodiments of the present invention, and common general technical solutions and / or characteristics in the solutions are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A wire and cable drawing and annealing device, characterized in that, Comprising: An annealing box (1), with an inlet and an outlet for the copper wire to enter and exit respectively at both ends of the annealing box (1); A heating device, the heating device includes an outer cover (2) and a pair of electrode wheels (3), the outer cover (2) is connected to the inner wall of the annealing box (1), and the outer cover (2) is made of a heat-conducting material. Through holes are provided at both ends of the outer cover (2). The electrode wheels (3) are driven by a motor to rotate, and the electrode wheels (3) are located inside the outer cover (2). The motor is connected to the outer cover (2). A first drain hole (10) is provided on the bottom end of the inner wall of the annealing box (1) near its outlet; A cooling device, the cooling device includes a cooling tank (4), the cooling tank (4) is connected to the inner wall of the annealing box (1), and a plurality of nozzles (6) are connected to one end of the inner wall of the cooling tank (4). A first water pump (5) communicating with an external water source is connected to the annealing box (1). A plurality of the nozzles (6) are all communicated with the first water pump (5). One end of the cooling tank (4) is connected to a circulation water tank (7), and a drainage hole is provided at one end of the inner wall of the cooling tank (4) away from the nozzles (6). The drainage hole is communicated with the circulation water tank (7); A circulation device, the circulation device includes a second water pump (8), the second water pump (8) is communicated with the inner cavity of the circulation water tank (7), and the output end of the second water pump (8) is connected to a water pipe (9). One end of the water pipe (9) away from the second water pump (8) extends to the bottom of the inner cavity of the outer cover (2).

2. A wire and cable drawing and annealing device as claimed in claim 1, wherein: A plurality of baffles (11) are connected to the bottom end of the inner wall of the outer cover (2), and a plurality of the baffles (11) are all made of a heat-conducting material.

3. The wire and cable wire drawing and annealing device according to claim 2, wherein: A plurality of the baffles (11) are arranged in a staggered manner and are all of an inclined structure.

4. A wire and cable drawing and annealing device according to claim 1, characterized in that: A plurality of first exhaust holes (12) are provided at the top end of the outer cover (2).

5. The wire and cable drawing and annealing device according to claim 1, characterized in that: A pair of symmetrically arranged guide wheels (16) are rotatably connected to the inner wall of the annealing box (1), and a pair of the guide wheels (16) are respectively located on both sides of the cooling tank (4).

6. The wire and cable wire drawing and annealing device according to claim 1, characterized in that: A plurality of the nozzles (6) are arranged at equal intervals along the direction of the inner cavity of the cooling tank (4).

7. An electric wire and cable wire drawing and annealing device according to claim 1, characterized in that: A filter screen (15) is connected to the inner wall of the cooling tank (4), and the filter screen (15) covers the drainage hole.

8. A wire and cable drawing and annealing device according to claim 1, characterized in that: The circulation water tank (7) is made of a heat-insulating and heat-preserving material.

9. A wire and cable drawing and annealing device according to claim 1, characterized in that: A plurality of second drain holes (13) are provided at the bottom of the annealing box (1), and a plurality of second exhaust holes (14) are provided at the top end of the annealing box (1).

10. A wire and cable drawing and annealing method according to any one of claims 1-9, characterized in that, Including the following steps: S1, the copper wire enters through the inlet of the annealing box (1), enters the outer cover (2) through the through hole on the outer cover (2), and then is respectively wound around a pair of electrode wheels (3). The motor drives the electrode wheels (3) to rotate to convey the copper wire. During the process, the electrode wheels (3) realize resistance heating of the copper wire; S2, the heat generated by the electrode wheels (3) and the copper wire is conducted to the cooling water at the bottom end of the inner wall of the outer cover (2) through the outer cover (2), causing the cooling water to evaporate. The generated steam covers the surface of the copper wire, and then the copper wire covered with heated water vapor moves to the outside of the outer cover (2) through the through hole; S3. After the copper wire leaves the outer cover (2), it enters the interior of the cooling tank (4). The first water pump (5) introduces external cooling water into the cooling tank (4) through the nozzle (6) to cool the copper wire, and the cooled copper wire leaves the annealing box (1) through the wire outlet of the annealing box (1). S4. The cooling water that has absorbed the heat of the copper wire inside the cooling tank (4) enters the circulation water tank (7) through the drainage hole. Subsequently, the second water pump (8) re-introduces the cooling water with a certain temperature in the circulation water tank (7) into the outer cover (2) through the water pipe (9) for evaporation.

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