CN115881352A - Expanded-diameter conductor cable and preparation method thereof - Google Patents
Expanded-diameter conductor cable and preparation method thereof Download PDFInfo
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- CN115881352A CN115881352A CN202211641718.XA CN202211641718A CN115881352A CN 115881352 A CN115881352 A CN 115881352A CN 202211641718 A CN202211641718 A CN 202211641718A CN 115881352 A CN115881352 A CN 115881352A
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Abstract
The invention provides an expanded conductor cable and a preparation method thereof. The expanded diameter conductor cable includes: the cable core, the conductor shielding layer, the insulating layer and the outer sheath are sequentially arranged from inside to outside; the cable core comprises a supporting structure and at least one conductor layer arranged on the periphery of the supporting structure, wherein the conductor layer comprises a plurality of conductor monofilaments. The technical scheme of the invention can avoid the problem of electric field concentration on the surface of the cable core caused by small outer diameter of the cable core.
Description
Technical Field
The invention relates to the technical field of cables, in particular to an expanded conductor cable and a preparation method thereof.
Background
The medium-voltage crosslinked polyethylene insulated power cable is widely applied to various industries such as urban distribution networks, green buildings, intelligent transportation, petroleum and petrochemical industry, intelligent manufacturing, resource and energy development and utilization, public services, marine economy and the like.
At present, a crosslinked polyethylene cable in the prior art comprises a cable core, a conductor shielding layer, an insulating layer and an outer sheath which are sequentially arranged from inside to outside, wherein the cable core is formed by stranding a plurality of conductor monofilaments, and the specification of the cable core is 25mm 2 In the following small-section cable, the problem of electric field concentration is easily caused on the surface of the cable core due to the small outer diameter of the cable core, so that the problem of insulation breakdown is easily caused due to overlarge electric field intensity on the surface of the cable core.
Disclosure of Invention
The invention mainly aims to provide an expanded conductor cable and a preparation method thereof, and aims to solve the problem of electric field concentration on the surface of a cable core caused by small outer diameter of the cable core in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an expanded diameter conductor cable comprising: the cable core, the conductor shielding layer, the insulating layer and the outer sheath are sequentially arranged from inside to outside; the cable core comprises a supporting structure and at least one conductor layer arranged on the periphery of the supporting structure, and the conductor layer comprises a plurality of conductor monofilaments.
Furthermore, the cable core also comprises a reinforced core, and the reinforced core, the supporting structure and the conductor layer are sequentially arranged from inside to outside along the radial direction of the cable core.
Further, the outer diameter of the reinforcing core ranges from 0.2mm to 0.6mm; and/or the support structure has an outer diameter in the range of 3mm to 15mm.
Further, the reinforcing core is made of aramid yarns.
Furthermore, the cable core also comprises a semi-conductive wrapping tape arranged between the conductor layer and the conductor shielding layer.
Further, the semi-conductive wrapping tape is made of a semi-conductive water-blocking material or a semi-conductive Teflon material.
Furthermore, the expanded diameter conductor cable also comprises an insulation shielding layer, a copper strip shielding layer and a wrapping layer which are arranged between the insulation layer and the outer sheath and are sequentially arranged from inside to outside.
Further, the insulating layer is insulated by crosslinked polyethylene; alternatively, the support structure is made of one of a silane cross-linked polyethylene material, a polyamide fiber material or a polycarbonate material.
Further, the outer diameter size range of the conductor monofilament is 0.6mm to 1.2mm, the conductor monofilament is made of copper or aluminum, the elongation of the copper conductor monofilament is more than 25%, and the elongation at break of the aluminum conductor monofilament is more than 20%.
According to another aspect of the invention, the preparation method of the expanded diameter conductor cable is used for preparing the expanded diameter conductor cable, the cable core further comprises a semi-conductive wrapping tape, and the preparation method comprises the following steps: a support structure extrusion step of extruding the support structure by an extruder; a conductor monofilament stranding step, namely stranding a plurality of conductor monofilaments on the periphery of the supporting structure, wherein the plurality of conductor monofilaments are stranded to form at least one conductor layer; and a wrapping step, namely wrapping a semi-conductive wrapping tape outside the conductor layer.
Further, the cable core further comprises a reinforcing core, and in the support structure extrusion step, extrusion is performed using an extruder having a screw with a length to diameter ratio of 28.
Further, in the extrusion molding step of the supporting structure, the body of the extruder is divided into four sections to plasticize the raw materials of the supporting structure, wherein the temperature of the first plasticizing section is 155 +/-10 ℃, the temperature of the second plasticizing section is 160 +/-10 ℃, the temperature of the third plasticizing section is 165 +/-10 ℃, and the temperature of the fourth plasticizing section is 170 +/-10 ℃; and/or, during the support structure extrusion step, controlling the extruder head temperature to 175 ± 10 ℃.
Furthermore, a plurality of conductor monofilaments are twisted to form a conductor layer, and the twisting direction of the conductor monofilaments is opposite to the wrapping direction of the semi-conductive wrapping tape; and/or the pitch diameter ratio of the conductor monofilament strands ranges from 14 to 18.
Furthermore, a plurality of conductor monofilaments are twisted to form two conductor layers, and the twisting direction of the first conductor layer, the twisting direction of the second conductor layer and the wrapping direction of the semi-conductive wrapping tape are sequentially right, left and right from inside to outside in the radial direction of the cable core; and/or the pitch diameter ratio of the conductor monofilament strands of the first conductor layer ranges from 20 times to 25 times, and the pitch diameter ratio of the conductor monofilament strands of the second conductor layer ranges from 14 times to 18 times.
Further, before the conductor monofilament stranding step, the preparation method further comprises the following steps: and a cooling step of cooling the integrated structure formed by the support structure and the reinforcing core.
Further, the cooling step includes a first cooling stage and a second cooling stage, the first cooling stage having a cooling temperature ranging from 60 ℃ to 70 ℃, and the second cooling stage having a cooling temperature ranging from 20 ℃ to 30 ℃.
By applying the technical scheme of the invention, the plurality of conductor monofilaments are twisted in a spiral form to form at least one conductor layer, so that the outer diameter of the cable core can be increased by arranging the supporting structure, the problem of electric field concentration caused by small outer diameter of the cable core is avoided, and the phenomenon of insulation breakdown is avoided. Meanwhile, when the cable core enters a chemical crosslinking catenary production line, the tensile force borne by the cable core is large, the strength of the cable core can be improved by the supporting structure, the problem that the cable core is easy to break due to the small strength of the cable core is avoided, and therefore the safety performance of the cable is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of an embodiment of an expanded diameter conductor cable according to the invention;
fig. 2 shows a schematic structural view of a core and a semi-conductive wrapping tape of the expanded diameter conductor cable of fig. 1.
Fig. 3 shows a flow chart of a method of manufacturing an expanded diameter conductor cable according to the invention;
fig. 4 shows a flow chart of a method of manufacturing an expanded conductor cable according to fig. 3;
fig. 5 shows a schematic view of a production line used in the support structure extrusion step of the method for manufacturing an expanded diameter conductor cable according to fig. 3; and
fig. 6 shows a schematic view of a production line used in the conductor filament stranding step of the method of manufacturing an expanded diameter conductor cable according to fig. 3.
Wherein the figures include the following reference numerals:
1. a support structure; 10. a cable core; 11. a reinforcement core; 2. a conductor monofilament; 3. a semi-conductive wrapping tape; 4. a conductor shield layer; 5. an insulating layer; 6. an insulating shield layer; 7. a copper strip shielding layer; 8. wrapping a covering; 9. an outer sheath; 101. a pay-off mechanism; 102. a body of the plastic extruding machine; 103. a head of the plastic extruding machine; 104. a front traction device; 105. a rear traction device; 106. a take-up mechanism; 107. a first conductor stranding cage; 108. a second conductor stranding cage; 109. and (4) wrapping the package.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The expanded-diameter conductor cable of the present invention is mainly applied to a cable core having a core size (i.e., a core cross-sectional area) of 25mm 2 The following small-section cables can be applied to cables of other specifications.
The specification of the cable core in production is 25mm 2 When a cable with a small cross section is used, the thickening of the conductor shielding layer can increase the extrusion pressure of the conductor shielding layer, so that part of the structure of the conductor shielding layer is embedded into the cable core, and the insulation eccentricity (namely, the thickness of the insulating layer on the periphery of the conductor shielding layer is not uniform) can be caused, and the insulation performance of the cable is affected. That is, the strength of the cable is increased by thickening the conductor shielding layer, which affects the insulation performance of the cable and is difficult to apply in practical production.
As shown in fig. 1 and 2, an embodiment of the present invention provides an expanded diameter conductor cable. The expanded diameter conductor cable includes: the cable core 10, the conductor shielding layer 4, the insulating layer 5 and the outer sheath 9 are sequentially arranged from inside to outside; the cable core 10 includes a support structure 1 and at least one conductor layer disposed on the periphery of the support structure 1, and the conductor layer includes a plurality of conductor monofilaments 2.
In the technical scheme, a plurality of conductor monofilaments 2 are twisted in a spiral mode to form a conductor layer, and the conductor shielding layer 4 plays a role in balancing an electric field, so that partial discharge between the cable core 10 and the insulating layer 5 is avoided, and the safety performance of the cable is ensured; the insulating layer 5 can prevent the current in the cable core 10 from diffusing outwards, and meanwhile, the insulating layer 5 can also protect the cable core 10 and prevent the conductor monofilaments 2 in the cable core 10 from being corroded or damaged; the outer sheath 9 can protect the cable core 10 and prevent the cable core 10 from being damaged or destroyed.
Through the arrangement, the supporting structure 1 is additionally arranged, so that the outer diameter of the cable core 10 can be increased, the problem of electric field concentration caused by the small outer diameter of the cable core 10 is avoided, and the phenomenon of insulation breakdown is avoided. Meanwhile, when the cable core enters a chemical crosslinking catenary production line, the tensile force borne by the cable core 10 is large, and the support structure 1 can also improve the strength of the cable core 10, so that the problem that the cable core 10 is easy to break due to the small strength of the cable core 10 is avoided, and the safety performance of the cable is ensured.
In another embodiment, two or more conductor layers may be provided, the two conductor layers being arranged in sequence in the radial direction of the expanded diameter conductor cable.
In the embodiment of the present invention, the support structure 1 is made of a high-strength and high-temperature resistant material. Alternatively, the support structure 1 is made of one of a silane cross-linked polyethylene material, a polyamide fiber material or a polycarbonate material.
In a preferred embodiment of the present invention, the support structure 1 is made of a silane cross-linked polyethylene material, and the support structure 1 is prepared by the following method: after being extruded and cooled by an extruding machine, the silane crosslinked polyethylene enters a steam room with the temperature reaching 90 ℃ for cooking and crosslinking, and the cooking time is 16 hours. The tensile strength of the support structure 1 after cooking can reach 20N/mm 2 The support structure 1 is placed in an oven at a temperature of 200 ℃ for 10min. Maximum elongation of the support structure 1 prepared by the above methodThe elongation was 175%, and the maximum permanent elongation after cooling was 15%. The properties of such a support structure 1 can meet the high temperature and high pressure production requirements of a chemical crosslinking process.
As shown in fig. 1 and fig. 2, in the embodiment of the present invention, the cable core 10 further includes a reinforced core 11, and the reinforced core 11, the support structure 1 and the conductor layer are sequentially arranged from inside to outside along a radial direction of the cable core 10.
Through the arrangement, the tensile strength of the supporting structure 1 can be enhanced by the reinforcing core 11, so that the overall tensile strength of the cable core 10 is further improved, and the problem of breakage of the cable core 10 is avoided.
In a preferred embodiment of the invention, the reinforcing core 11 has an outer diameter in the range of 0.2mm to 0.6mm and the support structure 1 has an outer diameter in the range of 3mm to 15mm.
As shown in fig. 2, in a preferred embodiment of the present invention, the reinforced core 11 is made of aramid yarns, and a plurality of aramid yarns are twisted to form the reinforced core 11, so as to achieve the effect of improving the tensile strength.
As shown in fig. 1 and 2, in an embodiment of the invention, the cable core 10 further comprises a semiconductive tape 3 arranged between the conductor layer and the conductor shield 4.
Through the arrangement, the semi-conductive wrapping tape 3 wraps the periphery of the cable core 10, and the effect of wrapping the conductor monofilament 2 can be achieved, so that the loose problem of the cable core 10 can be avoided in the production process.
In a preferred embodiment of the present invention, the semi-conductive wrapping tape 3 is made of semi-conductive water-resistant material or semi-conductive teflon material.
As shown in fig. 1, in the embodiment of the present invention, the expanded diameter conductor cable further includes an insulation shielding layer 6, a copper tape shielding layer 7 and a wrapping layer 8, which are disposed between the insulation layer 5 and the outer sheath 9 and are sequentially disposed from inside to outside.
In the technical scheme, the insulating shielding layer 6 can play a role in further balancing an electric field, so that partial discharge between the insulating layer 5 and the outer sheath 9 is avoided; the copper strip shielding layer 7 can shield an electric field and plays roles in shielding and insulating; the copper strip shielding layer 7 and the outer sheath 9 can be separated around the covering 8, and construction is facilitated.
In a preferred embodiment of the invention, the insulating layer 5 is made of cross-linked polyethylene.
In a preferred embodiment of the invention, the conductor filaments 2 are made of copper or aluminum. The resistivity of copper is 0.0170 x 10 -6 Omega. M, resistivity of aluminum 0.02712 × 10 -6 Omega.m. The elongation of the copper conductor monofilament is more than 25 percent, and the elongation at break of the aluminum conductor monofilament is more than 20 percent.
In a preferred embodiment of the invention, the conductor filaments 2 have an outer diameter size in the range of 0.6mm to 1.2mm.
In one embodiment of the invention, the cable core 10 has a cross-sectional area of 25mm 2 The outer diameter of the supporting structure 1 is 11mm, the cable core 10 comprises 1 conductor layer, the conductor layer comprises 41 conductor monofilaments 2, and the outer diameter of each conductor monofilament 2 is 0.9mm. The cable can meet the requirement of a small-section cable, and can solve the problem of electric field concentration caused by the small outer diameter of the cable core 10, so that the phenomenon of insulation breakdown is avoided.
As shown in fig. 3, an embodiment of the present invention further provides a method for preparing an expanded diameter conductor cable, where the method is used to prepare the expanded diameter conductor cable, the cable core 10 further includes a semi-conductive wrapping tape 3, and the method includes: a support structure extrusion step of extruding the support structure 1 by an extruder; a conductor monofilament stranding step, namely stranding a plurality of conductor monofilaments 2 on the periphery of the support structure 1, wherein the plurality of conductor monofilaments 2 are stranded to form at least one conductor layer; and a wrapping step, namely wrapping a semi-conductive wrapping tape 3 outside the conductor layer.
In the above technical solution, the method for manufacturing an expanded diameter conductor cable further comprises: the conductor shielding layer 4 is extruded on the periphery of the cable core 10, the insulating layer 5, the insulating shielding layer 6 and the copper strip shielding layer 7 are extruded to form a three-layer co-extrusion structure, the conductor shielding layer 4 is extruded to be wrapped, the wrapping layer 8 is wrapped outside the three-layer co-extrusion structure, and the outer sheath 9 is extruded to be wrapped outside the wrapping layer 8. The processes of extruding and wrapping belong to the prior art, and are not described herein again.
In the embodiment of the invention, the cable core further comprises a reinforcing core 11, and in the support structure extrusion step, extrusion is performed using an extruder having a screw with a length to diameter ratio of 28.
In the above technical solution, as shown in fig. 5, the reinforcing core 11 is wound on the unwinding mechanism 101 and moved from left to right in the horizontal direction shown in fig. 5 by the traction of the front traction device 104, the raw material of the supporting structure 1 passes through the body 102 of the extruder and the head 103 of the extruder in sequence and is extruded on the periphery of the reinforcing core 11, and the integrated structure formed after extrusion and including the reinforcing core 11 and the supporting structure 1 enters the winding mechanism 106 by the traction of the rear traction device 105.
Through above-mentioned setting, adopt the draw ratio to be 28's extruding machine, the screw rod of extruding machine is longer, can effectually plasticize supporting structure 1's raw materials, promotes extrusion efficiency simultaneously.
In an embodiment of the invention, in the support structure extrusion step, the body of the extruder plasticizes the material of the support structure 1 in four sections, the temperature of the first plasticization section being 155 + -10 deg.C, the temperature of the second plasticization section being 160 + -10 deg.C, the temperature of the third plasticization section being 165 + -10 deg.C, the temperature of the fourth plasticization section being 170 + -10 deg.C; and/or, during the support structure extrusion step, controlling the extruder head temperature to 175 ± 10 ℃.
Specifically, the extrusion temperature is as shown in table 1, the extruder is divided into a body, a head, and flanges for connecting the body and the head, in the extruder, the material passes through the body, the flanges, and the head in sequence, the body of the extruder is divided into 6 zones, the head of the extruder is divided into 5 zones, and the flange part for connecting the head of the body is divided into 2 zones. Along the moving direction of the materials in the extruding machine, a zone 1 of the extruding machine body is a feeding zone, zones 2 and 3 are propelling zones, zones 4 and 5 are plasticizing zones, and a zone 6 is a heating zone.
TABLE 1 extrusion temperature of silane crosslinked polyethylene materials for support structures
The first plasticizing section corresponds to the area 1 of the machine body, the second plasticizing section corresponds to the areas 2 and 3 of the machine body, the third plasticizing section corresponds to the areas four of the machine body, and the fourth plasticizing section corresponds to the areas 5 and 6 of the machine body, so that compared with the prior art, the extrusion molding temperature is higher, the raw materials of the supporting structure 1 can be fully plasticized, and the extrusion speed is improved; meanwhile, the material after extrusion molding enters a steam room with the temperature reaching 90 ℃ for cooking and crosslinking, the cooking time is 16h, the material is placed in a 200 ℃ oven and lasts for 10min, and therefore, the crosslinking efficiency of the material can be improved and the cooking time is shortened by setting the higher extrusion molding temperature.
In one embodiment of the present invention, a plurality of conductor monofilaments 2 are twisted to form a conductor layer, the twisting direction of the plurality of conductor monofilaments 2 is opposite to the wrapping direction of the semiconductive wrapping tape 3, and the pitch-diameter ratio of the twisted conductor monofilaments 2 ranges from 14 times to 18 times.
The pitch ratio is a ratio of a pitch length of the conductor monofilament 2 when twisted to an outer diameter of a conductor layer in which the conductor monofilament 2 is located.
In the above technical solution, as shown in fig. 6, after being paid out from the paying-off mechanism 101, a plurality of conductor monofilaments 2 pass through the first conductor stranding cage 107 to be uniformly and spirally stranded on the periphery of the supporting structure 1, pass through the wrapping device 109, wrap the semi-conductive wrapping tape 3, and finally enter the take-up mechanism 106 under the traction of the rear traction device 105. For example, the twisting direction of the conductor monofilament 2 is leftward (i.e., counterclockwise, or S-direction), and the wrapping direction of the semiconductive wrapping tape 3 is rightward (i.e., clockwise, or Z-direction).
Through the setting, the direction of twist with many conductor monofilament 2 and the semiconduction around winding of band 3 set up to opposite, on the one hand, can avoid leading to semiconduction around winding band 3 embedding conductor in situ around the package direction the same with the direction of twist to ensure that the conductor layer does not receive the destruction, on the other hand, when the cable core received the pulling force, the conductor layer and semiconduction around the rotation torque opposite direction of band 3, can offset each other, can avoid the cable core loose problem to appear. In addition, the twisted pitch diameter ratio of the conductor monofilament 2 is set to be 14 times to 18 times, so that the compactness of the surface of the cable core can be improved, and materials are prevented from being embedded into the cable core in the insulation extrusion process.
In one embodiment of the invention, a plurality of conductor monofilaments 2 are twisted to form two conductor layers, and the twisting direction of the first conductor layer, the twisting direction of the second conductor layer and the wrapping direction of the semi-conductive wrapping tape 3 are sequentially right, left and right from inside to outside in the radial direction of the cable core; the pitch diameter ratio of the twisted conductor monofilaments 2 of the first conductor layer ranges from 20 times to 25 times, and the pitch diameter ratio of the twisted conductor monofilaments 2 of the second conductor layer ranges from 14 times to 18 times.
In the above technical solution, the difference between the formation of two conductor layers by twisting and the formation of one conductor layer by twisting is only that: the conductor monofilament 2 passes through the first conductor stranding cage 107 and the second conductor stranding cage 108 in this order to be stranded to form two conductor layers.
Through the arrangement, the twisting directions of the two adjacent conductor layers are opposite, and the alternating current impedance can be reduced, so that the corona phenomenon and the electric energy loss are reduced. The pitch diameter ratio of the twisted conductor monofilaments 2 of the first conductor layer is set to be 20-25 times, so that the resistance of the conductor layer can meet the standard requirement, and the material cost is reduced.
As shown in fig. 4, in an embodiment of the present invention, before the conductor monofilament twisting step, the preparation method further comprises: a cooling step of cooling the integrated structure formed by the support structure 1 and the reinforcing core 11.
In the above technical solution, the cooling step includes a first cooling stage and a second cooling stage, the cooling temperature range of the first cooling stage is 60 ℃ to 70 ℃, and the cooling temperature range of the second cooling stage is 20 ℃ to 30 ℃.
Through the arrangement, the cooling step is divided into two stages, so that the internal stress generated by the supporting structure 1 due to the temperature drop can be avoided, and the supporting structure 1 is prevented from being brittle and broken.
In the embodiment of the invention, the lapping coverage rate of the semi-conductive lapping tape 3 ranges from 10% to 25%.
It should be noted that the lapping rate refers to a ratio of a width of the overlapping or gap to a width of the strip along the tape width direction when the semi-conductive lapping tape 3 is lapped in an overlapping manner.
Through the arrangement, the conductor layer can be protected, and conductor monofilaments 2 are prevented from being loose, so that materials are prevented from being embedded into the conductor layer in the insulation extrusion process.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: through setting up bearing structure, can increase the external diameter of cable core, avoid appearing electric field concentration problem because of the little electric diameter that leads to of cable core to avoid appearing insulation breakdown's phenomenon. Meanwhile, when the cable core enters a chemical crosslinking catenary production line, the tensile force borne by the cable core is large, the strength of the cable core can be improved by the supporting structure, the problem that the cable core is easy to break due to the small strength of the cable core is avoided, and therefore the safety performance of the cable is ensured.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. An expanded diameter conductor cable, comprising: the cable core (10), the conductor shielding layer (4), the insulating layer (5) and the outer sheath (9) are sequentially arranged from inside to outside; the cable core (10) comprises a supporting structure (1) and at least one conductor layer arranged on the periphery of the supporting structure (1), wherein the conductor layer comprises a plurality of conductor monofilaments (2).
2. The expanded-diameter conductor cable according to claim 1, characterized in that the cable core (10) further comprises a reinforcing core (11), the support structure (1) and the conductor layer being arranged in the radial direction of the cable core (10) from the inside to the outside.
3. The expanded conductor cable according to claim 2, characterized in that the outer diameter dimension of the reinforcing core (11) ranges from 0.2mm to 0.6mm; and/or the outer diameter of the support structure (1) ranges from 3mm to 15mm.
4. Expanded-diameter conductor cable according to claim 2, characterized in that the reinforcing core (11) is made of aramid yarn.
5. The expanded diameter conductor cable according to claim 1, characterized in that the cable core (10) further comprises a semi-conductive wrapping tape (3) arranged between the conductor layer and the conductor shield (4).
6. The expanded-diameter conductor cable according to claim 5, wherein the semi-conductive taped tape (3) is made of a semi-conductive water-blocking material or a semi-conductive Teflon material.
7. The expanded diameter conductor cable according to any one of claims 1 to 6, further comprising an insulation shield layer (6), a copper tape shield layer (7) and a wrapping layer (8) arranged in sequence from inside to outside between the insulation layer (5) and the outer sheath (9).
8. Expanded diameter conductor cable according to any of claims 1 to 6, characterized in that the insulation layer (5) is insulated with cross-linked polyethylene; or the supporting structure (1) is made of one of silane cross-linked polyethylene material, polyamide fiber material or polycarbonate material.
9. Expanded-diameter conductor cable according to any one of claims 1 to 6, characterized in that the conductor monofilaments (2) have an outer diameter size in the range of 0.6mm to 1.2mm, the conductor monofilaments (2) are made of copper or aluminium, the elongation of the copper conductor monofilaments is more than 25%, and the elongation at break of the aluminium conductor monofilaments is more than 20%.
10. A method of manufacturing an expanded diameter conductor cable, according to any of claims 1 to 9, said cable core (10) further comprising a semi-conductive wrapping tape (3), said method comprising:
a support structure extrusion step of extruding the support structure (1) by an extruder;
a conductor monofilament stranding step of stranding a plurality of conductor monofilaments (2) on the outer periphery of the support structure (1), wherein the plurality of conductor monofilaments (2) are stranded to form at least one layer of the conductor layer; and
and a wrapping step, wherein a semi-conductive wrapping tape (3) is wrapped outside the conductor layer.
11. The method for manufacturing an expanded-diameter conductor cable according to claim 10, wherein the cable core further comprises a reinforcing core (11), and in the support structure extrusion step, extrusion is performed using an extruder having a screw with an aspect ratio of 28.
12. The method for manufacturing an expanded conductor cable according to claim 10, wherein, in the support structure extrusion step, the body of the extruder plasticizes the material of the support structure (1) in four sections, the temperature of the first plasticization section being 155 ± 10 ℃, the temperature of the second plasticization section being 160 ± 10 ℃, the temperature of the third plasticization section being 165 ± 10 ℃, and the temperature of the fourth plasticization section being 170 ± 10 ℃; and/or, during said support structure extrusion step, controlling the head temperature of the extruder to 175 ± 10 ℃.
13. The method for producing an expanded conductor cable according to any one of claims 10 to 12, wherein a plurality of conductor monofilaments (2) are twisted to form a layer of the conductor layer,
the stranding direction of the conductor monofilaments (2) is opposite to the wrapping direction of the semi-conductive wrapping tape (3); and/or the presence of a gas in the gas,
the pitch diameter ratio of the stranded conductor monofilament (2) ranges from 14 times to 18 times.
14. The method for manufacturing an expanded conductor cable according to any of claims 10 to 12, wherein a plurality of conductor monofilaments (2) are twisted to form two layers of the conductor layer,
from inside to outside in the radial direction of the cable core, the twisting direction of the first layer of conductor layer, the twisting direction of the second layer of conductor layer and the wrapping direction of the semi-conductive wrapping tape (3) are right, left and right in sequence; and/or the presence of a gas in the gas,
the conductor monofilaments (2) of the first conductor layer have a twisted pitch diameter ratio in the range of 20 to 25 times, and the conductor monofilaments (2) of the second conductor layer have a twisted pitch diameter ratio in the range of 14 to 18 times.
15. The method of making an expanded diameter conductor cable of claim 11, wherein prior to said conductor filament stranding step, said method further comprises: a cooling step of cooling the integrated structure formed by the support structure (1) and the reinforcing core (11).
16. The method of making an expanded conductor cable according to claim 15, wherein the cooling step comprises a first cooling stage and a second cooling stage, the first cooling stage having a cooling temperature in the range of 60 ℃ to 70 ℃ and the second cooling stage having a cooling temperature in the range of 20 ℃ to 30 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211641718.XA CN115881352A (en) | 2022-12-20 | 2022-12-20 | Expanded-diameter conductor cable and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211641718.XA CN115881352A (en) | 2022-12-20 | 2022-12-20 | Expanded-diameter conductor cable and preparation method thereof |
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| CN115881352A true CN115881352A (en) | 2023-03-31 |
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| CN202211641718.XA Pending CN115881352A (en) | 2022-12-20 | 2022-12-20 | Expanded-diameter conductor cable and preparation method thereof |
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- 2022-12-20 CN CN202211641718.XA patent/CN115881352A/en active Pending
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