Wire core conductor annealing equipment for cable production

Abstract

The invention discloses cable core conductor annealing equipment for cable production, and belongs to the technical field of cable core conductor annealing, the cable core conductor annealing equipment comprises an annealing box with a plurality of wire inlet holes and a plurality of wire outlet holes on the left and right, a plurality of heating rollers are distributed in the annealing box, and a plurality of blowing guide rods for guiding and conveying cable core conductors are additionally arranged on the heating rollers; a plurality of heating rollers which are distributed in a left-right and up-down multi-point mode are arranged in an annealing box, blowing guide rods communicated with an air supply system are arranged on the heating rollers, flow guide covers and fans which are installed on the heating rollers are arranged on the opposite faces of the blowing guide rods, and in the process that a wire core conductor passes through the annealing box, protective atmosphere is supplied into hollow rods and then diffused outwards; meanwhile, a fan is started, protective atmosphere is guided into the hollow roller body to be heated, then the protective atmosphere is shunted outwards and sprayed to the wire core conductor through a plurality of jet holes, the upper and lower end faces and the front and back directions of the wire core conductor are uniformly heated under the protection of the atmosphere, and the annealing effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wire core conductor annealing, and more specifically to a wire core conductor annealing device for cable production. Background Art

[0002] In the cable manufacturing process, annealing of the core conductor is an indispensable step. The main purpose is to improve the electrical and mechanical properties of the conductor core through high-temperature heating. The key to this process is to prevent the oxidation of the copper wire to ensure the high quality and reliability of the cable products.

[0003] The heat utilization rate of the traditional insulated cable core conductor annealing process is low, and the air inside the entire annealing box does not flow. The insulated cable core conductor can only be annealed on the upper surface through the heating device, and the heating is uneven. After searching the patent number CN111029036A, a "device for processing and annealing insulated cable core conductors" is disclosed. A pipe is opened on the inner wall of the annealing box, and the heating device located in the upper part of the annealing box absorbs the heat sprayed from the top of the insulated cable core conductor, transfers it to the heat outlet pipe below through the channel, and discharges it to the bottom of the insulated cable core conductor through the fan, connecting the upper and lower parts of the entire annealing box, so that internal air circulation is generated.

[0004] However, in the actual air flow process, due to the certain distance between the heat outlet pipe and the upper port of the heat inlet pipe, the wind speed flow at the heat outlet pipe port is accelerated only by the rotation of the fan, and the suction strength at the pipe port of the heat inlet pipe is relatively weak. Compared with the heat directly sprayed above the insulated cable core conductor through the heating device, the heat intensity of the insulated cable core conductor is not good, which can easily lead to uneven heating of the insulated cable core conductor in the up and down directions and the front and back directions, affecting the annealing effect.

[0005] Therefore, we propose a wire core conductor annealing equipment for cable production to address the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the existing practical problems. Compared with the existing technology, a wire core conductor annealing equipment for cable production is provided. The annealing box is provided with a plurality of heating rollers distributed at multiple points left and right and up and down. The heating rollers are provided with blowing guide rods connected to the air supply system, and a guide cover and a fan installed on the heating rollers are arranged on the opposite side of the blowing guide rods. When the wire core conductor passes through the annealing box, a protective atmosphere is supplied into the hollow rod and then diffused outward. At the same time, the fan is started, and the protective atmosphere is introduced into the interior of the hollow roller body for heating, and then the protective atmosphere is diverted and sprayed outward from a plurality of jet holes to the wire core conductor. Under the protection of the atmosphere, the upper and lower end faces of the wire core conductor and the front and rear directions are uniformly heated, thereby improving the annealing effect.

[0007] The object of the present invention can be achieved by the following technical scheme: A wire core conductor annealing device for cable production, comprising an annealing box with a plurality of wire inlet holes and a wire outlet hole respectively opened on the left and right sides, a plurality of heating rollers are distributed inside the annealing box, and the plurality of heating rollers staggered on the left and right sides are installed in the annealing box through a lifting mechanism, and two lifting mechanisms are respectively arranged at the upper and lower ends of the annealing box; The heating roller comprises a hollow roller body with a heating chamber inside, an electric heating wire is installed in the heating chamber, a guide cover with a fan is installed on the end wall of each hollow roller body, and two adjacent guide covers are arranged alternately up and down, a plurality of groups of diversion holes connected to the guide cover are arranged on the end wall of the hollow roller body facing the guide cover, and a plurality of groups of jet holes connected to the inside of the hollow roller body are arranged on the end wall of the hollow roller body away from the guide cover; A plurality of blowing guide rods are distributed in an annular manner on the end wall of each hollow roller body away from the air guide cover. The blowing guide rod comprises a hollow rod fixedly installed between the front and rear end walls of the hollow roller body and externally connected to an air intake system. The hollow rod is provided with a plurality of annular grooves adapted to the positions of the wire inlet holes. A guide jet assembly connected to the hollow rod and used for guiding the wire core conductor is rotatably installed in the annular groove.

[0008] Furthermore, guide rollers for guiding the wire core conductors are provided at both ends of the annealing box, and guide grooves corresponding to the positions of the wire inlet and outlet holes are opened on the guide rollers. A pair of guide rollers are used to conduct multiple wire core conductors to pass left and right.

[0009] Furthermore, the lifting mechanism comprises a driving box fixed to the top or bottom of the annealing box, and a lifting frame extending to the annealing box and fixedly installed with a plurality of heating rollers arranged at the same level is slidably installed in the driving box.

[0010] Furthermore, the lifting frame includes a lifting plate slidably installed in the driving box, and the front and rear ends of the lifting plate are fixedly connected to multiple pairs of mounting plates corresponding to the positions of multiple heating rollers, and the lower end of each pair of the mounting plates passes through the annealing box and is fixedly connected to the front and rear ends of the hollow roller body.

[0011] Furthermore, the air intake system includes a confluence cavity opened at the end of the hollow roller body and connected to the interior of multiple hollow rods, the mounting plate and the lifting plate are internally provided with flow cavities that are interconnected and connected to the confluence cavity, and the lifting plate is externally connected with an air intake pipe that is arranged to communicate with the internal flow cavity of the lifting plate.

[0012] Furthermore, the guide jet assembly comprises a jet sleeve rotatably mounted on the hollow rod, and a plurality of jet holes are annularly opened on both side end walls of the jet sleeve, and the jet holes are connected inside and outside.

[0013] Furthermore, an air jet port connected to the inside of the hollow rod is provided on the end wall of each annular groove facing away from the axial direction of the hollow roller body, and the air jet port is connected to the blowing hole inside and outside.

[0014] The present invention also provides a method for using a core conductor annealing device for cable production, comprising the following steps: Step 1: Threading process: first, use the lifting mechanism to separate the two sets of heating rollers distributed up and down, and insert multiple core conductors one by one from the wire inlet hole and out from the wire outlet hole. Then use the lifting mechanism to push the two sets of heating rollers toward each other, and the two adjacent sets of blowing guide rods on the left and right are staggered up and down after contacting the core conductors, so that the core conductors are arranged in the annealing box in a continuous S-shaped structure; Step 2: Annealing treatment, using an external traction device to pull and drag the core conductor, the gas supply system supplies protective atmosphere into multiple groups of spray guide rods, and sprays out from the spray holes on the rotating spray sleeve to fully contact the core conductor; At the same time, the fan is started, and the protective atmosphere is diverted to the inside of the hollow roller body through the guide cover and the diversion hole for heating. After being heated, it is diverted outward through multiple jet holes to heat the wire core conductor; Step 3: Cooling treatment: a cooling box is added outside the annealing box, and the core wire drawn out of the annealing box is cooled in the cooling box to complete the annealing operation of the core conductor.

[0015] Compared with the prior art, the advantages of the present invention are: (1) This scheme is to add a plurality of blowing guide rods for guiding and conveying the wire core conductors on adjacent heating rollers, and the two groups of blowing guide rods adjacent to each other are distributed up and down. When working, the wire core conductors are arranged in a continuous S-shaped structure in the annealing box, and the plurality of heating rollers are distributed at multiple points on the left and right and up and down. Each heating roller is provided with a blowing guide rod connected to the air supply system, and a guide cover and a fan installed on the heating roller are arranged on the opposite side of the blowing guide rod. When the wire core conductor passes through the annealing box, the protective atmosphere is supplied into the hollow rod and then diffused outward. At the same time, the fan is started, and the protective atmosphere is introduced into the interior of the hollow roller body for heating, and then the protective atmosphere is split outward and sprayed toward the wire core conductor through multiple jet holes. Under the protection of the atmosphere, the upper and lower end faces of the wire core conductor are evenly heated, thereby improving the annealing effect.

[0016] (2) In this scheme, a plurality of rotatably mounted jet sleeves are added to the hollow rod. The jet sleeves are provided with annularly distributed blowing holes. An air jet port connected to the inside of the hollow rod and the blowing holes is opened on the end wall of the annular groove facing away from the axial direction of the hollow roller body. During the annealing process, an external traction device is used to pull and drag the wire core conductor. The wire core conductor is conveyed on a plurality of continuously S-shaped distributed jet sleeves, which causes the jet sleeve to continuously rotate in the annular groove. After the protective atmosphere is supplied into the hollow rod, it is ejected outward from the blowing holes on the rotating jet sleeve, which has a dispersing effect on the protective atmosphere, so that the protective atmosphere is evenly diffused outward and fully contacts the wire core conductor during the conveying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention after a plurality of core conductors are inserted into an annealing box; Figure 2 It is a schematic structural diagram of two adjacent heating rollers of the present invention when they are arranged up and down; Figure 3 It is a schematic structural diagram of the heating roller of the present invention combined with a plurality of blowing guide rods; Figure 4 It is a schematic structural diagram of the present invention when the jet sleeve and the hollow rod are detached; Figure 5 An internal cross-sectional view of the heating roller of the present invention; Figure 6 It is a schematic diagram of the structure of the present invention when the core conductor is arranged in an S shape in an annealing box; Figure 7 It is a top view of the wire core conductor of the present invention when it passes through two adjacent heating rollers; Figure 8 A bottom view of the wire core conductor of the present invention when it passes through two adjacent heating rollers; Fig. 9 It is a working cross-sectional view of the core conductor of the present invention when it passes through two adjacent heating rollers; Fig.10 This is a working cross-sectional view of the core conductor of the present invention when it passes through one of the heating rollers.

[0018] Description of the numbers in the figure: Annealing box; 101, wire inlet hole, 102, wire outlet hole; 2, heating roller; 21, hollow roller body; 211, jet hole; 212, diverter hole; 22, electric heating wire; 23, guide cover; 24, fan; 25, confluence chamber; 3, spray guide rod; 31, hollow rod; 311, annular groove; 312, jet nozzle; 32, spray sleeve; 321, spray hole; 33, vent pipe; 4, guide roller; 401, guide groove; 5, lifting frame; 51, mounting plate; 52, lifting plate; 6, electric push cylinder. DETAILED DESCRIPTION

[0019] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0020] Example 1: The present invention discloses a wire core conductor annealing device for cable production, see Figure 1 , Figure 2 , including an annealing box 1 with a wire inlet hole 101 and a wire outlet hole 102 on the left and right respectively, the wire inlet hole 101 and the wire outlet hole 102 are provided with multiple and one-to-one corresponding, and the left and right ends of the annealing box 1 are provided with guide rollers 4 for guiding the wire core conductor to pass through, and the guide rollers 4 are provided with guide grooves 401 corresponding to the positions of the wire inlet hole 101 and the wire outlet hole 102.

[0021] A plurality of heating rollers 2 are arranged between a pair of guide rollers 4 in the annealing box 1. The plurality of heating rollers 2 staggered on the left and right are installed in the annealing box 1 through a lifting mechanism, and two lifting mechanisms are respectively arranged at the upper and lower ends of the annealing box 1. The lifting mechanism includes a driving box fixed to the top or bottom of the annealing box 1, a lifting frame 5 extending to the annealing box 1 and fixedly installed with a plurality of heating rollers 2 arranged at the same level is slidably installed in the driving box, the lifting frame 5 includes a lifting plate 52 slidably installed in the driving box, and the front and rear ends of the lifting plate 52 are fixedly connected to a plurality of pairs of mounting plates 51 corresponding to the positions of the plurality of heating rollers 2, and the lower end of each pair of mounting plates 51 penetrates the annealing box 1 and is fixedly connected to the front and rear ends of the hollow roller body 21; During the threading process, refer to Figure 1 and Figure 6 First, the two groups of heating rollers 2 distributed up and down are separated by a lifting mechanism, and multiple core conductors are passed through multiple wire inlet holes 101 and out of wire outlet holes 102 one by one. A pair of guide rollers 4 arranged on the left and right are used to conduct the multiple core conductors to pass left and right, so that the multiple core conductors are evenly distributed in the annealing box 1 along the horizontal direction. Note that in this process, a spare rope can be added at the front end of the core conductor, and the spare rope can be used as a traction end and pre-arranged in the annealing box 1.

[0022] See also Figure 2 , Figure 3 , Figure 5The heating roller 2 includes a hollow roller body 21 with a heating chamber inside. The hollow roller body 21 is an I-shaped structure. A heating wire 22 is installed in the heating chamber. A guide cover 23 with a fan 24 is installed on the end wall of each hollow roller body 21, and two adjacent guide covers 23 are staggered up and down. A plurality of groups of diversion holes 212 connected to the guide cover 23 are provided on the end wall of the hollow roller body 21 facing the guide cover 23. A plurality of groups of jet holes 211 connected to the inside of the hollow roller body 21 are provided on the end wall of the hollow roller body 21 away from the guide cover 23. A plurality of blowing guide rods 3 are distributed annularly on the end wall of each hollow roller body 21 away from the guide cover 23. See also Figure 6-Figure 8 , using a lifting mechanism to push two sets of heating rollers 2 toward each other, two sets of adjacent blowing guide rods 3 on the left and right are staggered up and down after contacting the core conductors, and the core conductors are arranged in the annealing box 1 in a continuous S-shaped structure; See also Fig. 9 During the transmission of the annealing box 1 along the S-shaped path, a protective atmosphere is supplied into the annealing box 1, and the fan 24 is started. The protective atmosphere is diverted to the inside of the hollow roller body 21 through the guide cover 23 and the diverter hole 212 for heating. After being heated, it is diverted outward through multiple jet holes 211 to heat the core conductor.

[0023] Embodiment 2: Based on Embodiment 1, this embodiment optimizes the structure of the blowing guide rod 3, as follows: See also Figure 3-Figure 5 The spray guide rod 3 includes a hollow rod 31 fixedly mounted between the front and rear end walls of the hollow roller body 21 and externally connected to an air intake system, a plurality of annular grooves 311 adapted to the position of the wire inlet hole 101 are provided on the hollow rod 31, and a guide jet assembly connected to the hollow rod 31 and used for guiding the wire core conductor is rotatably mounted at the annular groove 311; The guide jet assembly includes a jet sleeve 32 rotatably mounted on the hollow rod 31. A plurality of jet holes 321 are annularly provided on the end walls on both sides of the jet sleeve 32. The jet holes 321 are arranged to be connected inside and outside. A jet port 312 connected to the inside of the hollow rod 31 is provided on the end wall of each annular groove 311 facing away from the axial direction of the hollow roller body 21. The jet port 312 and the jet hole 321 are arranged to be connected inside and outside. The core conductor passes through the middle of the outer end surface of the jet sleeve 32 under the guidance of the inlet hole 101, the outlet hole 102 and the guide roller, and the protective atmosphere diffused outward from 321 is evenly diffused to the core conductor. The air intake system includes a confluence chamber 25 opened at the end of the hollow roller body 21 and connected to the inside of the plurality of hollow rods 31, and a flow chamber that is connected to each other and connected to the confluence chamber 25 is opened inside the mounting plate 51 and the lifting plate 52, and an air intake pipe 8 that is connected to the flow chamber inside the lifting plate 52 is externally connected to the lifting plate 52; See also Fig. 9 , Fig.10 The air supply system supplies protective atmosphere into multiple groups of blowing guide rods 3, and the core conductor is transmitted on multiple continuous S-shaped jet sleeves 32, which prompt the jet sleeve 32 to continuously rotate in the annular groove 311. After the protective atmosphere is supplied into the hollow rod 31, the protective atmosphere overflows through the jet port 312, and then diffuses and sprays outward from multiple blowing holes 321 on the rotating jet sleeve 32 that are connected to the jet port 312, and fully contacts with the core conductor. The protective atmosphere filled in the annealing box 1 is drawn into the hollow roller body 21 again when the fan 24 is started, and after heating, it is sprayed toward the core conductor being transmitted through multiple jet holes 211. A protective atmosphere supply source is externally connected to the air inlet pipe 8, and an exhaust pipe is externally connected to one side of the annealing box. Multiple heating rollers 2 are distributed at multiple points left and right and up and down. Each heating roller 2 is provided with a blowing guide rod 3 connected to the air supply system, so that the core conductor is evenly heated under the protection of the atmosphere, thereby improving the annealing effect.

[0024] In combination with Example 1 and Example 2, the present invention further proposes a method for using a core conductor annealing device for cable production, comprising the following steps: Step 1: Threading treatment, firstly, the two groups of heating rollers 2 distributed up and down are separated up and down by using a lifting mechanism, and a plurality of core conductors are inserted into a plurality of inlet holes 101 and out of the outlet holes 102 one by one, and then the two groups of heating rollers 2 are pushed toward each other by using a lifting mechanism, and the two adjacent groups of blowing guide rods 3 on the left and right are staggered up and down after contacting with the core conductors, so that the core conductors are arranged in the annealing box 1 in a continuous S-shaped structure; Step 2: Annealing treatment, using an external traction device to tug and pull the core conductor, the gas supply system supplies protective atmosphere into multiple groups of spray guide rods 3, the core conductor is transmitted on multiple continuous S-shaped spray sleeves 32, causing the spray sleeve 32 to continuously rotate in the annular groove 311, and after the protective atmosphere is supplied into the hollow rod 31, it is sprayed outward from the spray hole 321 on the spray sleeve 32 to fully contact with the core conductor; At the same time, the fan 24 is started, and the protective atmosphere is diverted to the inside of the hollow roller body 21 through the guide cover 23 and the diverter hole 212 for heating, and then diverted outward through the multiple jet holes 211 to heat the wire core conductor after being heated; Step 3: Cooling treatment: a cooling box is added outside the annealing box 1, and the core conductor drawn out of the annealing box 1 is cooled in the cooling box to complete the annealing operation of the core conductor.

[0025] In summary, a plurality of blowing guide rods 3 for guiding and conveying the wire core conductors are added to the adjacent heating rollers 2, and two groups of blowing guide rods 3 adjacent to each other are distributed up and down. When working, the wire core conductors are horizontally passed through the annealing box 1, and the heating rollers 2 are driven toward each other, so that the wire core conductors are arranged in the annealing box 1 in a continuous S-shaped structure; A plurality of heating rollers 2 are distributed at multiple points on the left and right and up and down, and each heating roller 2 is provided with a blowing guide rod 3 connected to the air supply system, and a guide cover 23 and a fan 24 matching structure installed on the heating roller 2 are arranged on the opposite side of the blowing guide rod 3. When the core conductor passes through the annealing box 1, the protective atmosphere is supplied into the hollow rod 31 and then diffused and sprayed outwardly from a plurality of blowing holes 321 on the rotating jet sleeve 32 connected to the air jet port 312, so as to fully contact the core conductor. At the same time, the fan 24 is started, and the protective atmosphere is introduced into the hollow roller body 21 for heating, and then the protective atmosphere is diverted and sprayed outwardly from the plurality of jet holes 211 to the core conductor, so that the core conductor is evenly heated under the protection of the atmosphere, thereby improving the annealing effect.

[0026] The above are only preferred specific implementation modes of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A wire core conductor annealing device for cable production, comprising an annealing box (1) with a plurality of wire inlet holes (101) and wire outlet holes (102) respectively formed on the left and right sides, characterized in that: A plurality of heating rollers (2) are distributed inside the annealing box (1), and the plurality of heating rollers (2) are staggered left and right and are distributed in the upper and lower directions of the annealing box (1) via a lifting mechanism; The heating roller (2) comprises a hollow roller body (21) with a heating chamber inside, a heating wire (22) installed in the heating chamber, a guide cover (23) with a fan (24) installed on the end wall of each hollow roller body (21), and two guide covers (23) arranged adjacent to each other on the left and right are arranged alternately up and down, a plurality of groups of flow diversion holes (212) connected to the guide cover (23) are provided on the end wall of the hollow roller body (21) facing the guide cover (23), and a plurality of groups of jet holes (211) connected to the inside of the guide cover (23) are provided on the end wall of the hollow roller body (21) away from the guide cover (23); A plurality of blowing guide rods (3) are annularly distributed on the end wall of each hollow roller body (21) on a side away from the air guide cover (23), the blowing guide rod (3) comprising a hollow rod (31) fixedly mounted between the front and rear end walls of the hollow roller body (21) and externally connected to an air intake system, a plurality of annular grooves (311) matching the positions of the wire inlet holes (101) are formed on the hollow rod (31), and a guide jet assembly connected to the hollow rod (31) and used for guiding the transmission of the wire core conductor is rotatably mounted at the annular groove (311).

2. The wire core conductor annealing equipment for cable production according to claim 1, characterized in that: The left and right ends of the annealing box (1) are both provided with guide rollers (4) for guiding the wire core conductor to pass through, and the guide rollers (4) are provided with guide grooves (401) corresponding to the positions of the wire inlet hole (101) and the wire outlet hole (102).

3. The wire core conductor annealing equipment for cable production according to claim 1, characterized in that: The lifting mechanism comprises a driving box fixed to the top or bottom of the annealing box (1), and a lifting frame (5) is slidably installed in the driving box, extending to the annealing box (1) and fixedly installed with a plurality of heating rollers (2) arranged at the same level.

4. The wire core conductor annealing equipment for cable production according to claim 3, characterized in that: The lifting frame (5) comprises a lifting plate (52) slidably mounted in a driving box, and the front and rear ends of the lifting plate (52) are fixedly connected to a plurality of pairs of mounting plates (51) corresponding to the positions of a plurality of heating rollers (2) in a one-to-one manner, and the lower end of each pair of mounting plates (51) passes through the annealing box (1) and is fixedly connected to the front and rear ends of the hollow roller body (21).

5. The wire core conductor annealing equipment for cable production according to claim 1, characterized in that: The air intake system comprises a confluence chamber (25) opened at the end of the hollow roller body (21) and connected to the inside of the plurality of hollow rods (31); the mounting plate (51) and the lifting plate (52) are provided with flow chambers that are interconnected and connected to the confluence chamber (25); the lifting plate (52) is externally connected to an air intake pipe (8) that is arranged to communicate with the flow chamber inside the lifting plate (52).

6. The wire core conductor annealing equipment for cable production according to claim 1, characterized in that: The guide jet assembly comprises a jet sleeve (32) rotatably mounted on the hollow rod (31), and a plurality of jet holes (321) are annularly formed on both side end walls of the jet sleeve (32), and the jet holes (321) are connected inside and outside.

7. The wire core conductor annealing equipment for cable production according to claim 1, characterized in that: An air jet port (312) connected to the inside of the hollow rod (31) is provided on the end wall of each annular groove (311) facing away from the axial direction of the hollow roller body (21), and the air jet port (312) is connected to the blowing hole (321) inside and outside.

8. A method for using a wire core conductor annealing device for cable production, using the wire core conductor annealing device for cable production as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: threading processing, inserting a plurality of wire core conductors one by one from the wire inlet hole (101) and out from the wire outlet hole (102), and then using a lifting mechanism to push two sets of heating rollers (2) towards each other, so that the wire core conductors are arranged in a continuous S-shaped structure in the annealing box (1); Step 2: Annealing treatment, using an external traction device to drag the wire core conductor, supplying a protective atmosphere into a plurality of sets of spray guide rods (3), and spraying it outwards from the spray holes (321) on the rotating spray sleeve (32). At the same time, starting the fan (24), the protective atmosphere is introduced into the hollow roller body (21) for heating, and then diverted outwards from the plurality of spray holes (211), so that the wire core conductor is evenly heated under the protection of the atmosphere; Step 3: Cooling treatment, adding a cooling box outside the annealing box (1), pulling the core wire out of the annealing box (1) to cool it in the cooling box, and completing the annealing operation of the core conductor.

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