Multi-core temperature sensing cable adopting efficient temperature sensing structure and process

Abstract

The invention discloses a multi-core temperature sensing cable adopting a high-efficiency temperature sensing structure and a process, and provides an optimization scheme in a forming process by combining the structural characteristics of the multi-core cable, meeting the temperature sensing requirements of a plurality of insulated conductors through a temperature sensing unit and combining the diameter difference of the plurality of insulated conductors. As powder is filled between the belting layer and the insulated conductors and has high thermal conductivity and better structural strength, the purpose is to feed back the temperature change of the insulated conductors to the temperature sensing unit in a concentrated manner, and the key is to ensure the relative position of each insulated conductor corresponding to the temperature sensing unit, so that not only is the temperature feedback efficiency ensured, but also the reliability of the temperature sensing unit is improved. And a gauge protection sleeve and a material injection pipe are additionally arranged in allusion to the forming process, so that complete filling of powder can be ensured, a conventional cable forming process is prevented from being damaged, the arc integrity of the whole cable is maintained, meanwhile, the speed of dissipating heat to the outside is increased, and heat accumulation of conductor insulation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of temperature-sensing cables, and in particular to a multi-core temperature-sensing cable and a process using a high-efficiency temperature-sensing structure. Background Art

[0002] The environment in which many cables are operated directly affects the heat dissipation effect of the cables after heating, resulting in accelerated aging of the conductor insulation, threatening the safe operation of the cables. By adding a temperature sensing unit to detect the temperature of the conductor insulation in real time, its essence is based on optical fiber and uses temperature as a "trigger condition" to feedback the hidden danger signals in the operation of the cable. Please refer to the relevant content in the publication number CN110517811A.

[0003] Combined with the structural form of multi-core cable, the temperature sensing unit is set at the center of multiple insulated metal conductors and keeps in contact with each other. However, it should be explained again that the diameters of multiple conductors in the cable are not completely consistent, but the diameter of the temperature sensing unit is consistent. In the actual production process, there is an obvious gap between the temperature sensing unit and at least one of the insulated conductors, so that the temperature sensing unit fails to accurately and timely feedback the temperature changes of the environment in which the insulation of some conductors is located;

[0004] In addition, because the key structure of the temperature sensing unit is the flexible material of optical fiber, the above-mentioned gap problem causes the temperature sensing unit to be offset during the cable processing and the local unit to bend. Whether it is the subsequent processing process or the cable laying process, it is likely to cause the internal optical fiber to be slightly bent, increasing the optical signal loss and affecting the temperature feedback accuracy and monitoring distance of the optical signal.

[0005] This application proposes a solution to this problem. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-core temperature-sensing cable and process with an efficient and stable temperature-sensing structure. The temperature-sensing unit is an optimization method for multi-core cables. Because the diameters of the insulated conductors inside the cable are not completely consistent, the temperature-sensing efficiency and accuracy of the temperature-sensing unit for at least one insulated conductor are delayed; in addition, it will also affect the processing level and stability of the temperature-sensing unit, resulting in local bending deformation of the temperature-sensing unit, causing micro-bending of the internal optical fiber, increased optical signal loss, and affecting the temperature feedback accuracy and monitoring distance of the optical signal. At the same time, the heat dissipation efficiency of the conductor insulation to the outside of the cable is improved, and the heat accumulation of the insulating material is reduced.

[0007] The object of the present invention can be achieved by the following technical scheme: a multi-core temperature sensing cable with an efficient temperature sensing structure includes an outer edge protective layer, an insulating conductor, a tape layer and a temperature sensing unit, wherein the insulating conductor is arranged in a ring shape along the center point of the temperature sensing unit, the tape layer is located outside the insulating conductor, and a high thermal conductivity reinforcement heat dissipation layer is arranged inside the tape layer to wrap the insulating conductor and the temperature sensing unit, and the outer edge protective layer is arranged outside the tape layer;

[0008] The high thermal conductivity reinforced heat dissipation layer is composed of high thermal conductivity powder and filling powder. The multi-core temperature sensing cable is made by a twisted cable forming process, and a powder pressurized filling process is provided in the twisted cable forming process of the multi-core temperature sensing cable.

[0009] It is further configured as follows: a wire arrangement assembly is provided in the twisted cable forming process, and the twisted cable forming process forms a powder pressurized filling process through the wire arrangement assembly, the wire arrangement assembly is composed of an installation sleeve, a gauge sleeve and an injection tube corresponding to the insulated conductor, and the injection tube is arranged in the middle position of adjacent insulated conductors.

[0010] It is further configured as follows: the injection tube is installed in the installation sleeve along the length direction of the corresponding insulated conductor, and wire slots corresponding to the insulated conductor are arranged between the injection tubes at adjacent positions, and the diameter of the wire slots is the same as the diameter of the insulated conductor.

[0011] It is further configured as follows: the inside of the injection tube is hollow, and a discharge port is provided at one end of the injection tube close to the temperature sensing unit, the outer curved surface of the injection tube is arc-shaped, and a filler gap is provided between the outer curved surface of the injection tube and the outer position of the insulating conductor.

[0012] It is further configured as follows: a covering section is provided at the middle position between the high thermal conductivity reinforcement heat dissipation layer and the injection pipe, the diameter protection sleeve is located at the middle position of the covering section, and the inner diameter of the diameter protection sleeve is equal to the outer diameter of the high thermal conductivity reinforcement heat dissipation layer.

[0013] It is further configured that: the temperature sensing unit and the center point of the mounting sleeve are on the same axis.

[0014] The multi-core temperature-sensitive cable includes the following stages in the cable stranding process:

[0015] Stage 1: Pass the temperature sensing unit and the insulated conductor through the wire slot on the installation sleeve in turn, use the injection pipe to arrange the wires of each insulated conductor and limit the position. Multiple insulated conductors are uniformly transmitted from the installation sleeve to the gauge sleeve.

[0016] Stage 2: During the stage 1, the multiple insulated conductors are continuously twisted by a twisting machine, and the semi-conductive water-tight tape and the non-metallic tape are wrapped around the multiple insulated conductors in an overlapping manner as needed. The twisting starting point of the non-metallic tape and the semi-conductive water-tight tape is located in the middle of the gauge sleeve and the injection pipe, and the end of the injection pipe away from the installation sleeve extends to the inside of the gauge sleeve;

[0017] Stage 3: Stage 3 is carried out simultaneously with Stage 2. After the high thermal conductivity powder and the filling powder are mixed in equal proportions, the high thermal conductivity powder and the filling powder are squeezed into the middle of each insulated conductor and the tape layer through the injection pipe by a booster pump to fill the gap between the fillers;

[0018] Stage 4: During stage 3, the diameter guard sleeve keeps rotating in the same direction to maintain the arc integrity of the high thermal conductivity reinforcement heat dissipation layer and provide a heat exchange environment for the diameter guard sleeve. In the heat exchange environment, the high thermal conductivity reinforcement heat dissipation layer passing through the diameter guard sleeve is subjected to high-heat reinforcement and then temperature reduction reinforcement.

[0019] The present invention has the following beneficial effects:

[0020] 1. Combined with the structural characteristics of multi-core cables, one temperature sensing unit meets the temperature sensing requirements of multiple insulated conductors. The key lies in improving the basic structure inside the cable in combination with the diameter differences of multiple insulated conductors. Specifically, powder is filled between the tape layer and the insulation of the insulated conductor to form a high thermal conductivity reinforcement heat dissipation layer. The powder needs to have both high thermal conductivity and structural strength. Specifically, the temperature changes of multiple insulated conductors and insulation are concentrated and quickly transmitted to the temperature sensing unit. The key lies in changing the arrangement of insulated conductors of different diameters, and improving the thermal conductivity efficiency and accuracy, while avoiding deviation of the temperature sensing unit and local bending deformation, resulting in micro-bending of the internal optical fiber, which affects the temperature feedback accuracy and monitoring distance of the optical signal;

[0021] 2. In combination with the above content, the cable forming process is further improved. Its essence is to use the injection pipe to cooperate with the forming process to inject powder synchronously, and also use the injection pipe and the installation sleeve to position each insulated conductor to avoid local position deviation during the forming process. The gauge sleeve is used to reposition the above powder injection process and the twisting process. On the basis of ensuring the conventional cable forming process, the simplest and most efficient structure is used to fully protect the temperature sensing unit from the outside, and the arc integrity of the entire cable is also guaranteed. At the same time, the high thermal conductivity reinforced heat dissipation layer is more conducive to the rapid transfer of heat to the outside and reduces the heat accumulation of the conductor insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the structure of a multi-core temperature sensing cable with a high-efficiency temperature sensing structure proposed by the present invention;

[0024] Figure 2 The multi-core temperature sensing cable with high efficiency temperature sensing structure proposed by the present invention Figure 1 A cross-sectional view of

[0025] Figure 3 It is a structural schematic diagram of a cable arrangement sleeve in a processing technology of a multi-core temperature-sensing cable adopting a high-efficiency temperature-sensing structure proposed by the present invention;

[0026] Figure 4 The processing technology of the multi-core temperature sensing cable with high-efficiency temperature sensing structure proposed by the present invention Figure 3 Side view of

[0027] Figure 5 A schematic diagram of the location of the processing technology of the multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure proposed by the present invention;

[0028] Figure 6 The processing technology of the multi-core temperature sensing cable with high-efficiency temperature sensing structure proposed by the present invention Figure 5 Side view of

[0029] Figure 7 This is a working diagram of the processing technology of the multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure proposed by the present invention.

[0030] In the figure: 1. Outer edge protection layer; 2. Tape layer; 3. High thermal conductivity reinforcement heat dissipation layer; 4. Insulated conductor; 5. Temperature sensing unit; 6. Installation sleeve; 7. Filling pipe; 8. Discharge port; 9. Gauge sleeve; 10. Filling gap. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1: A temperature sensing unit optimization method is proposed for multi-core cables. Because the diameters of the insulated conductors inside the cable are not completely consistent, the temperature sensing efficiency of the temperature sensing unit for a certain insulated conductor is delayed. In addition, the horizontality of the temperature sensing unit is affected, resulting in local bending deformation of the temperature sensing unit, which will also directly affect the temperature sensing efficiency of the temperature sensing unit. The following technical solutions are proposed:

[0033] Reference Figures 1-2 The multi-core temperature sensing cable with an efficient temperature sensing structure in this embodiment includes an outer edge protection layer 1, an insulated conductor 4, a tape layer 2 and a temperature sensing unit 5. The insulated conductor 4 is arranged in a ring shape along the center point of the temperature sensing unit 5. The tape layer 2 is located outside the insulated conductor 4, and a high thermal conductivity reinforcement heat dissipation layer 3 is arranged inside the tape layer 2 to wrap the insulated conductor 4 and the temperature sensing unit 5. The outer edge protection layer 1 is arranged outside the tape layer 2;

[0034] The high thermal conductivity reinforced heat dissipation layer 3 is composed of high thermal conductivity powder and filling powder. The multi-core temperature sensing cable is made by a twisted cable forming process, and a powder pressurized filling process is provided in the twisted cable forming process of the multi-core temperature sensing cable.

[0035] Solution description: For a multi-core cable, its essence is that it contains more than one insulated conductor 4, and the maximum number of insulated conductors 4 in a conventional multi-core cable is three to five, and the insulated conductor 4 specifically includes an insulated conductor and an insulating outer layer, and a possible metal shielding layer;

[0036] Specific as Figure 2 As shown, the outer edge protection layer 1 and the wrapping layer 2 are not mainly explained. What needs to be explained is: the high thermal conductivity reinforcement heat dissipation layer 3 set for the three insulated conductors 4 is essentially obtained by mixing one or more powders in equal proportions. Specifically, it is necessary to ensure that the powder combination has both high thermal conductivity and structural strength, such as materials such as aluminum nitride. Aluminum nitride not only has high thermal conductivity (310W / m·K), but also has good electrical insulation. The powder combination is squeezed into the wrapping layer 2 and "solidified" to form a solid by pressurization, which provides structural strength for the three insulated conductors 4, ensures that the three insulated conductors 4 are in complete tangential contact with the temperature sensing unit 5, or indirectly contacted through the high thermal conductivity reinforcement heat dissipation layer, and avoids local bending problems in the temperature sensing unit 5. On the other hand, it is possible to collect the heat generated by the three insulated conductors 4 in a centralized manner, thereby feeding back to the temperature sensing unit 5 in a centralized manner.

[0037] Embodiment 2: Based on the structural characteristics of the cable in Embodiment 1, the following molding process is proposed:

[0038] Reference Figures 3 to 7, a processing technology of a multi-core temperature-sensitive cable with an efficient temperature-sensitive structure is adopted, a cable arrangement component is provided in the cable forming process, and the cable forming process forms a powder pressurized filling process through the cable arrangement component, the cable arrangement component is composed of a mounting sleeve 6, a gauge sleeve 9 and an injection tube 7 corresponding to the insulated conductor 4, the injection tube 7 is arranged in the middle position of adjacent insulated conductors 4, the injection tube 7 is installed in the mounting sleeve 6 along the length direction of the corresponding insulated conductor 4, and a wire slot corresponding to the insulated conductor 4 is provided between the injection tubes 7 at adjacent positions, and the diameter of the wire slot is the same as the diameter of the insulated conductor 4;

[0039] The inside of the injection tube 7 is hollow, and a discharge port 8 is provided at one end of the injection tube 7 close to the temperature sensing unit 5. The outer curved surface of the injection tube 7 is arc-shaped, and a filler gap 10 is provided between the outer curved surface of the injection tube 7 and the outer position of the insulating conductor 4. A covering section is provided at the middle position between the high thermal conductivity reinforcement heat dissipation layer 3 and the injection tube 7. The diameter protection sleeve 9 is located in the middle position of the covering section, and the inner diameter of the diameter protection sleeve 9 is equal to the outer diameter of the high thermal conductivity reinforcement heat dissipation layer 3. The center point of the temperature sensing unit 5 and the mounting sleeve 6 are on the same axis.

[0040] Solution description: For the production process of multi-core cables: specifically based on the large-scale equipment of the cable twisting machine, for example, during the continuous transmission of three insulated conductors 4, the semi-conductive water-resistant tape or non-metallic tape is continuously wrapped around the outside of the three insulated conductors 4, but combined with the diameter of the three insulated conductors 4, the twisted semi-conductive water-resistant tape or metal tape cannot completely form a complete circular ring. In this regard, the extrusion process is used to make the wrapped semi-conductive water-resistant tape or non-metallic tape expand and form a relatively complete circular ring, and for this, it is necessary to add a diameter protection sleeve 10 again.

[0041] Embodiment 3: Combining Embodiment 1 and Embodiment 2, the overall forming process is explained:

[0042] The stranding process of multi-core temperature-sensitive cables includes the following stages:

[0043] Stage 1: Pass the temperature sensing unit 5 and the insulated conductor 4 through the wire slot on the installation sleeve 6 in sequence, and use the injection pipe 7 to arrange and limit the position of each insulated conductor 4. Multiple insulated conductors 4 are uniformly transmitted from the installation sleeve 6 to the gauge sleeve 9;

[0044] Stage 2: During the stage 1, the plurality of insulated conductors 4 are continuously twisted by a twisting machine, and the semi-conductive water-tight tape or non-metallic tape is continuously wound on the plurality of insulated conductors 4. The twisting starting point of the semi-conductive water-tight tape or non-metallic tape is located in the middle of the gauge sleeve 9 and the injection tube 7, and the end of the injection tube 7 away from the installation sleeve 6 extends to the inside of the gauge sleeve 9;

[0045] Stage 3: Stage 3 is carried out simultaneously with stage 2. After the high thermal conductivity powder and the filling powder are mixed in equal proportions, the high thermal conductivity powder and the filling powder are squeezed into the middle of each insulated conductor 4 and the tape layer 2 along the injection pipe 7 by a booster pump to fill the filler gap 10;

[0046] Stage 4: During stage 3, the diameter protection sleeve 9 keeps rotating in the same direction to maintain the arc integrity of the high thermal conductivity reinforcement heat dissipation layer 3 and provide a heat exchange environment for the diameter protection sleeve 9. In the heat exchange environment, the high thermal conductivity reinforcement heat dissipation layer 3 passing through the diameter protection sleeve 9 is subjected to high-heat reinforcement and then temperature reduction reinforcement.

[0047] Program Description: The specific Figure 5 For illustration, the three insulated conductors 4 are continuously transmitted from right to left. During this process, the three insulated conductors 4 can be continuously wrapped with a semi-conductive water-tight tape or a non-metallic tape by a cable-twisting machine. It should be explained that: because the three insulated conductors 4 only keep moving linearly, while the semi-conductive water-tight tape or the non-metallic tape keeps relatively still but keeps rotating around the three insulated conductors 4, Figure 5 The twisting starting point marked in the figure is mainly used to indicate the connection point of the semiconducting water-resistant tape or non-metallic tape relative to the insulated conductor 4, and the twisting starting point of the semiconducting water-resistant tape or non-metallic tape needs to correspond to the injection pipe 7;

[0048] The purpose of this part is: when the three insulated conductors 4 are wrapped with the semiconducting water-resistant tape or the non-metallic tape, the three insulated conductors 4 are initially fixed with the injection tube 7, and it is also necessary to ensure that one end of the injection tube 7 penetrates into the inner position of the semiconducting water-resistant tape or the non-metallic tape that has been wrapped, so that the semiconducting water-resistant tape or the non-metallic tape that has been wrapped can be set as a container for the filler, and the injection tube 7 penetrates into the inner part of the container, and according to the transmission direction of the insulated conductor 4, it is only necessary to limit the position of the three insulated conductors 4 according to the diameter limit of the insulated conductor 4 and the structural characteristics of the injection tube 7;

[0049] Then, in conjunction with the above-mentioned stage three, since the overall structure is transmitted from right to left, it can be understood that: the end of the injection tube 7 away from the installation sleeve 6 is just flush with the middle position of the gauge sleeve 9, so that in the overall process, the powder mixture is continuously injected into the container composed of the semiconducting resistance water belt or non-metallic belt by a structure such as a booster pump. It is further understood that: the injection position of the powder composition is completely located inside the gauge sleeve 9, so that in conjunction with the transmission process of the insulated conductor 4, the gauge sleeve 9 will also continue to rotate. The purpose of this is to avoid the irregular deformation of the local position of the tape layer 2 caused by the extrusion of the powder composition, mainly to ensure that the high-heat reinforcement layer 3 formed in the end is a complete circle;

[0050] It should also be noted that: in the process of injecting the powder mixture, the setting length of the diameter protection sleeve 9 can also be extended, and the heat exchange environment can be set from right to left in conjunction with the transmission direction of the insulated conductor 4. Specifically, the powder mixture is first heated to make the powder mixture present an inconspicuous molten state, the purpose of which is to completely extrude the powder, and finally the powder mixture in the inconspicuous molten state is cooled, so that the finally formed high thermal conductivity reinforcement heat dissipation layer 3 presents an integrated solidified state, thereby improving the structural strength.

[0051] In summary: In combination with the structural characteristics of multi-core cables, the temperature sensing unit meets the temperature sensing requirements of multiple insulated conductors, and it is necessary to propose an optimization plan in the molding process in combination with the diameter differences of multiple insulated conductors. The powder is filled between the tape layer and the insulated conductor. The powder has high thermal conductivity and certain structural strength. Its purpose is to:

[0052] The key to feeding back the temperature changes of multiple insulated conductors to the temperature sensing unit is to ensure the relative position of each insulated conductor to the temperature sensing unit, which not only ensures the temperature feedback efficiency, but also avoids local bending of the temperature sensing unit affecting the temperature monitoring effect. The addition of a gauge sleeve and an injection tube for the molding process can ensure that the powder is completely filled in and avoid damage to the conventional cable molding process, ensuring that the temperature sensing unit in the cable has better structural strength and maintaining the arc integrity of the entire cable. At the same time, the speed of heat dissipation to the outside is increased, and the heat accumulation of the conductor insulation is reduced.

[0053] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-core temperature sensing cable with an efficient temperature sensing structure comprises an outer edge protective layer (1), an insulating conductor (4), a wrapping layer (2) and a temperature sensing unit (5), characterized in that: The insulated conductor (4) is arranged in a ring shape along the center point of the temperature sensing unit (5); the tape layer (2) is located outside the insulated conductor (4); a high thermal conductivity reinforcement heat dissipation layer (3) is arranged inside the tape layer (2) to wrap the insulated conductor (4) and the temperature sensing unit (5); and the outer edge protection layer (1) is arranged outside the tape layer (2); The high thermal conductivity reinforced heat dissipation layer (3) is composed of high thermal conductivity powder and filling powder. The multi-core temperature sensing cable is manufactured by a twisted cable forming process, and a powder pressurized filling process is provided in the twisted cable forming process of the multi-core temperature sensing cable.

2. A processing technology for a multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure, used to produce a multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure as claimed in claim 1, characterized in that: A wire arrangement assembly is provided in the twisted cable forming process, and the twisted cable forming process forms a powder pressurized filling process through the wire arrangement assembly. The wire arrangement assembly is composed of a mounting sleeve (6), a gauge sleeve (9) and an injection pipe (7) corresponding to the insulated conductor (4), and the injection pipe (7) is arranged in the middle position of adjacent insulated conductors (4).

3. The processing technology of the multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure according to claim 2 is characterized in that: The injection tube (7) is installed in the installation sleeve (6) along the length direction of the corresponding insulated conductor (4), and wire slots corresponding to the insulated conductor (4) are provided between the injection tubes (7) at adjacent positions, and the diameter of the wire slots is the same as the diameter of the insulated conductor (4).

4. The processing technology of the multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure according to claim 3 is characterized in that: The inside of the injection tube (7) is hollow, and a discharge port (8) is provided at one end of the injection tube (7) close to the temperature sensing unit (5). The outer curved surface of the injection tube (7) is in an arc shape, and a filler gap (10) is provided between the outer curved surface of the injection tube (7) and the outer position of the insulating conductor (4).

5. The processing technology of the multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure according to claim 2 is characterized in that: A covering section is provided at a middle position between the high thermal conductivity reinforcement heat dissipation layer (3) and the injection pipe (7), the diameter protection sleeve (9) is located at a middle position of the covering section, and the inner diameter of the diameter protection sleeve (9) is equal to the outer diameter of the high thermal conductivity reinforcement heat dissipation layer (3).

6. The processing technology of the multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure according to claim 2 is characterized in that: The center points of the temperature sensing unit (5) and the mounting sleeve (6) are located on the same axis.

7. The processing technology of the multi-core temperature-sensing cable with a high-efficiency temperature-sensing structure according to any one of claims 2 to 6, characterized in that: The multi-core temperature-sensitive cable includes the following stages in the cable stranding process: Stage 1: The temperature sensing unit (5) and the insulated conductor (4) are sequentially passed through the wire slots on the installation sleeve (6), and each insulated conductor (4) is arranged and limited by the injection pipe (7), and the multiple insulated conductors (4) are uniformly transmitted along the direction from the installation sleeve (6) to the gauge sleeve (9); Stage 2: During the stage 1, the plurality of insulated conductors (4) are continuously twisted by a twisting machine, and the semi-conductive water-tight tape or non-metallic tape is continuously wound on the plurality of insulated conductors (4). The twisting starting point of the semi-conductive water-tight tape or non-metallic tape is located in the middle of the gauge sleeve (9) and the injection pipe (7), and the end of the injection pipe (7) away from the installation sleeve (6) extends to the inside of the gauge sleeve (9); Stage 3: Stage 3 is carried out simultaneously with stage 2, wherein the high thermal conductivity powder and the filling powder are mixed in equal proportions, and then the high thermal conductivity powder and the filling powder are squeezed into the middle of each insulated conductor (6) and the tape layer (2) through a booster pump along the injection pipe (7) to fill the filler gap (10); Stage 4: During the stage 3, the diameter protection sleeve (9) keeps rotating in the same direction to maintain the arc integrity of the high thermal conductivity reinforcement heat dissipation layer (3) and provide a heat exchange environment for the diameter protection sleeve (9). In the heat exchange environment, the high thermal conductivity reinforcement heat dissipation layer (3) passing through the diameter protection sleeve (9) is subjected to high-heat reinforcement and then to cooling reinforcement.

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