A high temperature resistant expanded diameter wire and a manufacturing method thereof

Abstract

The present invention discloses a high temperature resistant expanded diameter conductor, which relates to the technical field related to high voltage conductors, including an inner frame, a heat dissipation frame, a first composite conductive core and a second composite conductive core, wherein the heat dissipation frame is evenly arranged on the outside of the inner frame, the first composite conductive core is symmetrically twisted and embedded on both sides of the inner end of the heat dissipation frame, the second composite conductive core is symmetrically twisted and embedded on both sides of the outer end of the heat dissipation frame, and a rubber bag is arranged on the inner side of the adjacent second composite conductive core. The present invention preliminarily fixes the inner first composite conductive core and the middle second composite conductive core by the heat dissipation frame, and then fixes and installs a plurality of heat dissipation frames, the first composite conductive core and the second composite conductive core in cooperation with the inner frame and the rubber bag, so that the inner frame, the heat dissipation frame, the first composite conductive core, the second composite conductive core and the rubber bag form a whole, thereby enhancing the overall stability of the device.

Description

Technical Field

[0001] The invention relates to the technical field related to high voltage conductors, and in particular to a high temperature resistant expanded diameter conductor and a manufacturing method thereof. Background Art

[0002] High temperature resistant expanded diameter wire is a kind of wire designed for high temperature environment. It is mainly used in industrial fields that need to withstand high temperature, such as aerospace, electronic equipment, automotive industry, etc. Compared with ordinary wires, high temperature resistant expanded diameter wire has stronger heat resistance, corrosion resistance and better mechanical properties. The expanded diameter design means that the cross-sectional area of ​​the wire is larger to carry a higher current load, ensuring that the current can be effectively conducted without generating excessive heat under high power and high temperature. This design can effectively reduce the heat accumulation caused by resistance and extend the service life of the wire.

[0003] The invention with authorization announcement number CN113689980B discloses a hollow expanded diameter high-voltage conductor, which supports the expanded diameter conductor through the cooperation of an inner ring body and an outer ring body. Reinforcing ribs are arranged between the inner ring body and the outer ring body, so that the inner ring body and the outer ring body can support each other and improve the overall compressive resistance of the hollow expanded diameter high-voltage conductor.

[0004] The above-mentioned device can improve the compressive resistance of the expanded diameter conductor, but the device can only support the inner layer. Once subjected to external force, the battery cells in the middle layer and the outermost layer are prone to misalignment, thereby affecting the integrity of the entire expanded diameter conductor. In addition, the battery cells located in the middle layer of the device lack a heat-conducting structure, which makes it easy for heat to accumulate in the middle layer of the expanded diameter conductor, affecting the high temperature resistance of the expanded diameter conductor. Summary of the invention

[0005] The object of the present invention is to provide a high temperature resistant expanded diameter conductor and a manufacturing method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A high temperature resistant expanded diameter conductor comprises an inner frame, a heat dissipation frame, a first composite conductive core and a second composite conductive core, wherein the heat dissipation frame is evenly arranged on the outer side of the inner frame, the first composite conductive core is symmetrically twisted and embedded on both sides of the inner end of the heat dissipation frame, the second composite conductive core is symmetrically twisted and embedded on both sides of the outer end of the heat dissipation frame, a rubber bag is arranged on the inner side of the adjacent second composite conductive core, a first composite reinforcing core is twisted and arranged on the outer side of the adjacent second composite conductive core, a second composite reinforcing core is twisted and arranged on the outer side of the heat dissipation frame, and a plurality of outer conductive cores are evenly twisted and arranged between the first composite reinforcing core and the second composite reinforcing core.

[0008] As a further solution of the present invention: the outer layers of the first composite reinforcement core and the second composite reinforcement core are coated with an insulating layer, and the outer layer conductive core is coated with an insulating layer.

[0009] As a further solution of the present invention: the diameter of the second composite conductive core wire is greater than the diameter of the first composite conductive core wire.

[0010] As a further solution of the present invention: the diameter of the first composite conductive core wire is the same as the diameter of the outer conductive core wire.

[0011] As a further solution of the present invention: the inner skeleton includes an inner fixing ring, a plurality of tightening parts are evenly and fixedly arranged on the outer side of the inner fixing ring, a limiting part is fixedly arranged on the middle side wall of the tightening part, and a piercing support part is fixedly arranged on the outer end of the tightening part.

[0012] As a further solution of the present invention: the heat dissipation skeleton includes a shell, a compression groove cooperating with the second composite reinforcement core is opened on the outer side of the shell, a deformation part cooperating with the rubber bag is symmetrically arranged on the middle part of the shell, a first heat conduction groove cooperating with the second composite conductive core is symmetrically arranged on the outer side of the deformation part, a second heat conduction groove cooperating with the first composite conductive core is symmetrically arranged on the inner side of the deformation part, an arc-shaped compression part cooperating with the limiting part is symmetrically arranged on the inner side of the shell, a fin heat dissipation part is fixedly arranged on the inner side of the arc-shaped compression part, a heat exchange cavity is opened in the fin heat dissipation part and the shell, and the heat exchange cavity is provided with heat conductive material.

[0013] As a further solution of the present invention: the first composite conductive core includes a first inner conductive core, the outer layer of the first inner conductive core is coated with a first thermal conductive layer, the second composite conductive core includes a second inner conductive core, the outer layer of the second inner conductive core is coated with a second thermal conductive layer, and the first thermal conductive layer and the second thermal conductive layer are graphene materials.

[0014] As a further solution of the present invention: air flow devices for heat dissipation are provided at both ends of the inner frame and the heat dissipation frame.

[0015] The method for manufacturing the high temperature resistant expanded diameter conductor comprises the following steps:

[0016] 1) manufacturing the inner frame, and twisting the inner frame according to the required twist angle during manufacturing;

[0017] 2) manufacturing the heat dissipation frame, and twisting the heat dissipation frame, wherein the twisting angle is the same as the twisting angle of the inner frame;

[0018] 3) Installing the first composite conductive core in the second heat-conducting groove, and installing the second composite conductive core in the first heat-conducting groove, to form a combined unit;

[0019] 4) Assemble and install the combined unit and the inner frame, and place the rubber bag between adjacent second composite conductive cores during assembly to complete the assembly at the core;

[0020] 5) The first composite reinforcing core, the second composite reinforcing core and the outer conductive core are twisted and installed on the outer side of the combined unit and the inner frame to obtain the high temperature resistant expanded diameter conductor.

[0021] As a further solution of the present invention: the number of the combination units in step 3) is 5.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The first inner composite conductive core and the second middle composite conductive core are initially fixed by the heat dissipation skeleton, and then the inner skeleton and the rubber bag are used to fix and install several heat dissipation skeletons, the first composite conductive core and the second composite conductive core, so that the inner skeleton, the heat dissipation skeleton, the first composite conductive core, the second composite conductive core and the rubber bag form a whole, and the overall stability of the device is enhanced. The first composite reinforcing core and the second composite reinforcing core cooperate to initially fix several heat dissipation skeletons and the second composite conductive cores, and several outer conductive cores fix several heat dissipation skeletons and the second composite conductive cores for the second time, so as to improve the integrity and stability of the expanded diameter conductor. The heat generated by the outer conductive core located in the outer layer can be directly dissipated to the outside, and the heat generated by the second composite conductive core is lower than that of the first composite conductive core (the thicker the wire diameter, the smaller the resistance, the smaller the heat generated, and the thick wire can conduct electricity more effectively, thereby reducing the heat generated when the current passes through). The first composite conductive core and the second composite conductive core transfer the heat to the inner skeleton and the heat dissipation skeleton to avoid the occurrence of heat accumulation (because the second composite conductive core is affected by both sides of the first composite conductive core and the outer conductive core, it is easy for heat to accumulate at the second composite conductive core);

[0024] The heat generated by the second composite conductive core is conducted to the shell and the heat-conducting gel in the heat exchange cavity through the first heat-conducting groove, the heat generated by the first composite conductive core is conducted to the shell and the heat-conducting gel in the heat exchange cavity through the second heat-conducting groove, the fin heat dissipation part dissipates the heat in the shell and the heat-conducting gel in the heat exchange cavity into the air, the shell conducts the heat to the inner frame, and the heat is dissipated into the air through the inner fixing ring, the upper limit part of the inner frame limits the arc-shaped pressing part, and the inner frame and the plurality of arc-shaped pressing parts form a ring to play a secondary supporting role. When the external force severely squeezes the expanded diameter conductor (when the force is transmitted to the second composite conductive core), the second composite conductive core compresses the deformation part to deform, and the top-penetrating support part in the inner frame pierces the rubber bag, so that the adjacent second composite conductive cores and adjacent shells are bonded together to prevent the deformation part from further deformation, and also prevent the second composite conductive core from sliding out to affect the integrity of the expanded diameter cable, the top-penetrating support part supports the adjacent shell, and the fin heat dissipation part can also play a supporting role as a reinforcing rib, and the heat dissipation frame itself is insulated;

[0025] The heat generated by the first inner conductive core and the second inner conductive core is conducted to the shell through the first heat conductive layer and the second heat conductive layer, thereby improving the heat conduction efficiency of the first composite conductive core and the second composite conductive core. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the end portion of the present invention.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0028] Figure 3 It is a partial explosion three-dimensional structure diagram of the present invention.

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the inner skeleton in the present invention.

[0030] Figure 5 It is a schematic diagram of the cross-sectional structure of the inner frame in the present invention.

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the heat dissipation skeleton in the present invention.

[0032] Figure 7 It is a schematic diagram of the cross-sectional structure of the heat dissipation skeleton in the present invention.

[0033] Figure 8 It is a schematic diagram of the cross-sectional structure of the first composite conductive core in the present invention.

[0034] Fig. 9 It is a schematic diagram of the cross-sectional structure of the second composite conductive core in the present invention.

[0035] Notes on figure numbers: 1. inner skeleton; 11. inner fixing ring; 12. tightening part; 13. limiting part; 14. piercing support part; 2. heat dissipation skeleton; 21. pressing groove; 22. first heat conduction groove; 23. second heat conduction groove; 24. fin heat dissipation part; 25. arc-shaped pressing part; 26. deformation part; 27. heat exchange cavity; 28. shell; 3. first composite conductive core; 31. first heat conduction layer; 32. first inner conductive core; 4. second composite conductive core; 41. second heat conduction layer; 42. second inner conductive core; 5. rubber bag; 6. first composite reinforcement core; 7. second composite reinforcement core; 8. outer conductive core. DETAILED DESCRIPTION

[0036] The following embodiments will be described in detail with reference to the accompanying drawings. In the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shape, thickness or height of each component may be enlarged or reduced. The embodiments listed in the present invention are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0037] Example

[0038] See also Figures 1 to 9 In an embodiment of the present invention, a high temperature resistant expanded diameter conductor comprises an inner frame 1, a heat dissipation frame 2, a first composite conductive core 3 and a second composite conductive core 4, wherein the heat dissipation frame 2 is evenly arranged on the outer side of the inner frame 1, the first composite conductive core 3 is symmetrically twisted and embedded and installed on both sides of the inner end of the heat dissipation frame 2, the second composite conductive core 4 is symmetrically twisted and embedded and installed on both sides of the outer end of the heat dissipation frame 2, a rubber bag 5 is arranged on the inner side of the adjacent second composite conductive core 4, a first composite reinforcing core 6 is twisted and arranged on the outer side of the adjacent second composite conductive core 4, and a second composite reinforcing core 6 is twisted and arranged on the outer side of the heat dissipation frame 2 The first composite reinforcing core 6 and the second composite reinforcing core 7 are coated with an insulating layer on the outer layer, and a plurality of outer conductive cores 8 are evenly twisted between the first composite reinforcing core 6 and the second composite reinforcing core 7, and the outer layer of the outer conductive core 8 is coated with an insulating layer, and the wire diameter of the second composite conductive core 4 is greater than the wire diameter of the first composite conductive core 3, and the wire diameter of the first composite conductive core 3 is the same as the wire diameter of the outer conductive core 8, and the inner first composite conductive core 3 and the middle second composite conductive core 4 are preliminarily fixed by the heat dissipation skeleton 2, and then the inner skeleton 1 and the rubber bag 5 are used to fix the plurality of heat dissipation skeletons 2 and the first composite conductive core 3. The composite conductive core 3 and the second composite conductive core 4 are fixedly installed, so that the inner frame 1, the heat dissipation frame 2, the first composite conductive core 3, the second composite conductive core 4 and the rubber bag 5 form a whole, which enhances the overall stability of the device. The first composite reinforcing core 6 and the second composite reinforcing core 7 cooperate to perform the initial fixation on the plurality of heat dissipation frames 2 and the second composite conductive core 4, and the plurality of outer conductive cores 8 perform the secondary fixation on the plurality of heat dissipation frames 2 and the second composite conductive core 4, thereby improving the integrity and stability of the expanded diameter conductor. The heat generated by the outer conductive core 8 located in the outer layer can be directly dissipated to the outside, and the second composite conductive core 8 can be directly dissipated to the outside. The heat generated by the battery core 4 is lower than that of the first composite conductive core 3 (the thicker the wire diameter, the smaller the resistance, the smaller the heat generated, and the thicker the wire can conduct electricity more effectively, thereby reducing the heat generated when the current passes through). The first composite conductive core 3 and the second composite conductive core 4 transfer the heat to the inner skeleton 1 and the heat dissipation skeleton 2 to avoid the occurrence of heat accumulation (because the second composite conductive core 4 is affected by the first composite conductive core 3 and the outer conductive core 8 on both sides, it is easy for heat to accumulate in the second composite conductive core 4). The conductive core layer of the first composite conductive core 3 and the outer conductive core 8 can be used in common, thereby saving production costs.

[0039] The inner skeleton 1 includes an inner fixing ring 11, a plurality of tightening parts 12 are evenly fixedly arranged on the outer side of the inner fixing ring 11, a limiting part 13 is fixedly arranged on the middle side wall of the tightening part 12, and a piercing support part 14 is fixedly arranged on the outer end of the tightening part 12. The inner diameter of the inner fixing ring 11 can be adjusted according to actual use requirements to expand the application range of the expanded diameter conductor.

[0040] The heat dissipation skeleton 2 includes a shell 28, the outer side of the shell 28 is provided with a pressing groove 21 that cooperates with the second composite reinforcing core 7, the middle part of the shell 28 is symmetrically provided with a deformation part 26 that cooperates with the rubber bag 5, the outer side of the deformation part 26 is symmetrically provided with a first heat conduction groove 22 that cooperates with the second composite conductive core 4, the inner side of the deformation part 26 is symmetrically provided with a second heat conduction groove 23 that cooperates with the first composite conductive core 3, the inner side of the shell 28 is symmetrically provided with an arc-shaped pressing part 25 that cooperates with the limiting part 13, the arc A fin heat sink 24 is fixedly arranged inside the shaped pressing portion 25, and a heat exchange cavity 27 is opened in the fin heat sink 24 and the shell 28. The heat exchange cavity 27 is provided with a heat conductive material, and the heat conductive material is preferably a heat conductive gel. The heat generated by the second composite conductive core 4 is transferred to the shell 28 and the heat conductive gel in the heat exchange cavity 27 through the first heat conductive groove 22, and the heat generated by the first composite conductive core 3 is transferred to the shell 28 and the heat conductive gel in the heat exchange cavity 27 through the second heat conductive groove 23. The fin heat sink 24 transfers the shell 28 and the heat exchange cavity 27 to the heat conductive gel. 7 The heat in the thermally conductive gel is dissipated into the air, and the shell 28 conducts the heat to the inner frame 1. Airflow circulation devices for heat dissipation are arranged at both ends of the expanded diameter wire to facilitate the dissipation of the internal heat of the expanded diameter wire. The upper limit portion 13 of the inner frame 1 limits the arc-shaped pressing portion 25 and the limiting portion 13 fits the outer diameter of the first composite conductive core 3. The inner frame 1 and the plurality of arc-shaped pressing portions 25 form a ring to play a secondary supporting role. When the external force severely squeezes the expanded diameter wire (when the force is transmitted to the second composite conductive core 4), the second The composite conductive core 4 compresses the deformation portion 26 to deform, and the piercing support portion 14 in the inner skeleton 1 pierces the rubber bag 5, so that the adjacent second composite conductive core 4 and the adjacent shell 28 are bonded together to prevent the deformation portion 26 from further deformation, and also to prevent the second composite conductive core 4 from sliding outward and affecting the integrity of the expanded cable. The piercing support portion 14 supports the adjacent shell 28 (after deformation to a certain extent, the piercing support portion 14 and the deformation portion 26 resist each other), and the fin heat dissipation portion 24 can also serve as a reinforcing rib to play a supporting role.

[0041] The first composite conductive core 3 includes a first inner conductive core 32, the outer layer of the first inner conductive core 32 is coated with a first thermal conductive layer 31, the second composite conductive core 4 includes a second inner conductive core 42, the outer layer of the second inner conductive core 42 is coated with a second thermal conductive layer 41, the first thermal conductive layer 31 and the second thermal conductive layer 41 are graphene materials, and the heat generated by the first inner conductive core 32 and the second inner conductive core 42 is conducted to the shell 28 through the first thermal conductive layer 31 and the second thermal conductive layer 41, thereby improving the thermal conductivity efficiency of the first composite conductive core 3 and the second composite conductive core 4.

[0042] During operation, the expanded diameter conductor conducts electricity through three conductive layers, a plurality of first composite conductive cores 3 located in the inner layer conduct electricity in the first layer, a plurality of second composite conductive cores 4 located in the middle layer conduct electricity in the second layer, and a plurality of outer conductive cores 8 located in the outer layer conduct electricity in the third layer. The heat of the middle layer and the inner layer is dissipated to the outside through a plurality of heat dissipation skeletons 2, and the inner skeleton 1 absorbs the heat in the heat dissipation skeleton 2 to improve the heat dissipation efficiency of the inner layer and the middle conductive layer, so that the expanded diameter conductor has good heat resistance. When the expanded diameter conductor is severely squeezed by external force, the deformation portion 26 in the heat dissipation skeleton 2 is deformed first, so that the top-through support portion 14 pierces the rubber bag 5, and then is glued and bonded to the external force squeezed position. The limiting portion 13 and the arc-shaped pressing portion 25 cooperate to support the expanded diameter conductor to avoid further deformation of the expanded diameter conductor, prevent the second composite conductive core 4 from sliding outward, and improve the stability of the expanded diameter conductor.

[0043] The present invention also provides a method for manufacturing the high temperature resistant expanded-diameter wire, comprising the following steps:

[0044] 1) manufacturing the inner frame 1, and twisting the inner frame 1 according to the required twist angle;

[0045] 2) manufacturing the heat dissipation frame 2, and twisting the heat dissipation frame 2, wherein the twisting angle is the same as the twisting angle of the inner frame 1;

[0046] 3) Install the first composite conductive core 3 in the second heat-conducting groove 23 and the second composite conductive core 4 in the first heat-conducting groove 22 to form a combined unit;

[0047] 4) Assembling the combined unit and the inner frame 1, and placing the rubber package 5 between adjacent second composite conductive cores 4 during assembly, thereby completing the assembly at the core;

[0048] 5) The first composite reinforcing core 6, the second composite reinforcing core 7 and the outer conductive core 8 are twisted and installed on the outer side of the combined unit and the inner frame 1 to obtain the high temperature resistant expanded diameter conductor.

[0049] The number of the combination units in step 3) is 5.

[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high temperature resistant expanded diameter conductor, comprising an inner frame (1), a heat dissipation frame (2), a first composite conductive core (3) and a second composite conductive core (4), characterized in that: The heat dissipation frame (2) is evenly arranged on the outside of the inner frame (1); the first composite conductive core (3) is symmetrically twisted and embedded on both sides of the inner end of the heat dissipation frame (2); the second composite conductive core (4) is symmetrically twisted and embedded on both sides of the outer end of the heat dissipation frame (2); a rubber bag (5) is arranged on the inner side of the adjacent second composite conductive core (4); a first composite reinforcing core (6) is twisted on the outer side of the adjacent second composite conductive core (4); a second composite reinforcing core (7) is twisted on the outer side of the heat dissipation frame (2); and a plurality of outer layer conductive cores (8) are evenly twisted between the first composite reinforcing core (6) and the second composite reinforcing core (7); The inner frame (1) comprises an inner fixing ring (11), a plurality of tightening parts (12) are evenly and fixedly arranged on the outer side of the inner fixing ring (11), a limiting part (13) is fixedly arranged on the middle side wall of the tightening part (12), and a penetration support part (14) is fixedly arranged on the outer end of the tightening part (12); The heat dissipation skeleton (2) comprises a shell (28), the outer side of the shell (28) is provided with a pressing groove (21) cooperating with the second composite reinforcing core (7), the middle part of the shell (28) is symmetrically provided with a deformation part (26) cooperating with the rubber bag (5), the outer side of the deformation part (26) is symmetrically provided with a first heat conduction groove (22) cooperating with the second composite conductive core (4), the inner side of the deformation part (26) is symmetrically provided with a second heat conduction groove (23) cooperating with the first composite conductive core (3), the inner side of the shell (28) is symmetrically provided with an arc-shaped pressing part (25) cooperating with the limiting part (13), the inner side of the arc-shaped pressing part (25) is fixedly provided with a fin heat dissipation part (24), the fin heat dissipation part (24) and the shell (28) are provided with a heat exchange cavity (27), and the heat exchange cavity (27) is provided with a heat conductive material.

2. The high temperature resistant expanded diameter conductor according to claim 1, characterized in that: The first composite reinforcement core (6) and the second composite reinforcement core (7) are coated with an insulating layer on their outer layers, and the outer conductive core (8) is coated with an insulating layer on its outer layer.

3. The high temperature resistant expanded diameter conductor according to claim 2, characterized in that: The wire diameter of the second composite conductive core (4) is greater than the wire diameter of the first composite conductive core (3).

4. The high temperature resistant expanded diameter conductor according to claim 3, characterized in that: The wire diameter of the first composite conductive core (3) is the same as the wire diameter of the outer conductive core (8).

5. The high temperature resistant expanded diameter conductor according to claim 1, characterized in that: The first composite conductive core (3) comprises a first inner conductive core (32), the outer layer of the first inner conductive core (32) being coated with a first heat-conducting layer (31); the second composite conductive core (4) comprises a second inner conductive core (42), the outer layer of the second inner conductive core (42) being coated with a second heat-conducting layer (41); the first heat-conducting layer (31) and the second heat-conducting layer (41) are graphene materials.

6. The high temperature resistant expanded diameter conductor according to claim 5, characterized in that: Air flow devices cooperating with heat dissipation are provided at both ends of the inner frame (1) and the heat dissipation frame (2).

7. A method for manufacturing a high temperature resistant expanded diameter wire, comprising the high temperature resistant expanded diameter wire according to any one of claims 1 to 6, characterized in that: The following steps are involved: 1) manufacturing the inner frame (1), and twisting the inner frame (1) according to a required twist angle during manufacturing; 2) manufacturing the heat dissipation frame (2), and twisting the heat dissipation frame (2), wherein the twisting angle is the same as the twisting angle of the inner frame (1); 3) installing the first composite conductive core (3) in the second heat-conducting groove (23) and installing the second composite conductive core (4) in the first heat-conducting groove (22) to form a combined unit; 4) Assembling and installing the combined unit and the inner frame (1), and placing the rubber bag (5) between adjacent second composite conductive cores (4) during assembly, thereby completing the assembly at the core; 5) The first composite reinforcing core (6), the second composite reinforcing core (7) and the outer conductive core (8) are twisted and installed on the outside of the combined unit and the inner skeleton (1) to obtain the high temperature resistant expanded diameter conductor.

8. The manufacturing method according to claim 7, characterized in that: The number of the combination units in step 3) is 5.

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