CN220121529U - Medium-voltage longitudinal water-blocking high-flame-retardance power cable - Google Patents
Medium-voltage longitudinal water-blocking high-flame-retardance power cable Download PDFInfo
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- CN220121529U CN220121529U CN202320308282.6U CN202320308282U CN220121529U CN 220121529 U CN220121529 U CN 220121529U CN 202320308282 U CN202320308282 U CN 202320308282U CN 220121529 U CN220121529 U CN 220121529U
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- water
- layer
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- conductor
- tape
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- 239000004020 conductor Substances 0.000 claims abstract description 72
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 230000000903 blocking effect Effects 0.000 claims description 27
- 239000003063 flame retardant Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 8
- 229920000098 polyolefin Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 240000005572 Syzygium cordatum Species 0.000 description 2
- 235000006650 Syzygium cordatum Nutrition 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005502 peroxidation Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model discloses a medium-voltage longitudinal water-blocking high-flame-retardance power cable, which comprises a cable core, wherein a water-blocking conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially arranged in the cable core from inside to outside, a metal shielding layer, an inner liner layer, an armor layer, a wrapping tape layer and an outer sheath layer are sequentially arranged outside the cable core, the water-blocking conductor comprises a central wire core, a middle conductor and an outer conductor, a water-blocking yarn is wound outside the central wire core, a layer of semiconductor water-blocking tape is wound outside the middle conductor in a clearance mode and is sequentially provided with the water-blocking yarn, and a layer of semiconductor water-blocking tape is wound outside the outer conductor in an overlapping mode.
Description
Technical Field
The utility model relates to the technical field of railway signal cables, in particular to a medium-voltage longitudinal water-blocking high-flame-retardance power cable.
Background
When the cable is damaged by a trauma accident or an insulating layer, water can enter the cable from the damage part to affect the insulating performance of the cable, so that when the cable fails, the water can extend along the axial direction of the cable to cause the increase of the replacement length of the cable and the improvement of the maintenance cost, and meanwhile, the service life of the product is reduced, water molecules permeate into the insulating layer to generate a water tree, insulation breakdown can be caused when the water tree extends to a certain degree, a fixed area is slightly powered off to affect the production and life of a normal worker, and a fire disaster can occur.
In the Chinese patent publication CN208673791U, namely a medium-voltage water-blocking cable, although the longitudinal waterproof performance of the cable is increased to a certain extent, the cable is general in flame retardance, and meanwhile, the waterproof performance can not effectively prevent water from entering.
Therefore, a longitudinal water-blocking high-flame-retardance power cable is needed, the cable can have high longitudinal waterproof performance, when the cable fails, water can be effectively prevented from extending along the axis direction of the cable, the length of the replaced cable is reduced, the maintenance cost is reduced, the service life of the product is prolonged, and meanwhile, the cable also needs to have high flame retardance.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides a medium-voltage longitudinal water-blocking high-flame-retardance power cable.
The technical scheme adopted for achieving the purpose is as follows:
the utility model provides a vertical high fire-retardant power cable that blocks water of middling pressure, includes the cable core, its characterized in that, be equipped with conductor, conductor shielding layer, insulating layer and the insulating shielding layer that blocks water in the cable core from interior to exterior in proper order, the cable core is equipped with metal shielding layer, inner liner, armor, band layer and oversheath layer outward in proper order.
Further, the water-blocking conductor is a cylindrical compressed stranded copper conductor, the water-blocking conductor comprises a central wire core, a middle conductor and an outer conductor, the middle conductor is wound outside the central wire core, the outer conductor is wound outside the middle conductor, a first water-blocking yarn is wound outside the central wire core, a first semiconductor water-blocking tape is wound in a gap outside the middle conductor and a second water-blocking yarn is arranged along the gap outside the middle conductor, and a second semiconductor water-blocking tape is overlapped and wrapped outside the outer conductor.
Further, the conductor shielding layer, the insulating layer and the insulating shielding layer are sequentially and tightly coated on the surface of the water-blocking conductor in a coextrusion mode, the conductor shielding layer takes polyolefin as a base material, the insulating layer is a crosslinked polyethylene insulating layer which takes polyethylene as a base material and peroxidation as a crosslinking agent, and the insulating shielding layer takes polyolefin as a base material.
Further, the nominal thickness of the conductor shielding layer is 0.7mm, the nominal thickness of the insulating layer is 4.5mm, and the thinnest point of any part of the insulating layer is not smaller than 90% -0.1mm of the nominal value.
Further, the metal shielding layer is formed by overlapping and wrapping a group layer by a soft copper belt and is reversely tied on the surface of the copper wire by a copper belt, and a first water blocking belt is wrapped between the metal shielding layer and the insulating shielding layer.
Further, the inner liner is made of a low-smoke halogen-free material with high flame retardant and good crusting performance, a second water blocking tape is wrapped between the inner liner and the metal shielding layer, and the inner liner is tightly extruded on the second water blocking tape outside the metal shielding layer.
Furthermore, the armor adopts non-magnetic metal tape armor, around the package between armor and the inner liner has the third water blocking tape, the armor closely arranges the third water blocking tape outside the inner liner.
Further, the overlap ratio of the first water-blocking tape, the second water-blocking tape and the third water-blocking tape is not less than 10%.
Further, the wrapping tape layer is a layer of wrapping water-blocking tape, and the covering rate of the wrapping tape layer is not less than 25%.
Furthermore, the outer sheath layer is made of a low-smoke halogen-free material with high flame retardant and good crusting performance, the nominal thickness of the outer sheath layer is 2.0mm, and the thinnest point is not less than 80-0.2 mm of the nominal value.
The utility model has the beneficial effects that:
1. according to the utility model, the water blocking conductors are arranged in the cable core, and the water blocking strips are arranged between the metal shielding layer and the insulating shielding layer, between the inner liner layer and the metal shielding layer and between the armor layer and the inner liner layer, so that the water blocking performance of the power cable is further improved, the longitudinal waterproof performance of the cable is improved, when the cable breaks down, the water can be effectively prevented from extending along the axial direction of the cable, the length of the replaced cable is reduced, the maintenance cost is reduced, and the service life of the product is prolonged.
2. The waterproof conductor is arranged in the cable core, and the waterproof performance in the cable core is further improved through the cooperation of the semiconductor waterproof tape and the waterproof yarns.
3. The cable metal shielding layer is composed of the soft copper tape and is always in contact with the cable core, and the short-circuit current requirement can be met according to the current and voltage carried by the cable.
4. The cable lining layer is made of low-smoke halogen-free materials, the non-magnetic metal tape armor layer is made of non-magnetic metal tape tightly wound on the outer surface of the water blocking tape wrapped on the surface of the lining layer, heating of the cable due to overlarge eddy-current loss of the cable can be avoided, current carrying condition is reduced, and certain short-circuit current can be born.
5. The inner liner layer and the outer sheath layer in the cable are made of low-smoke halogen-free materials with high flame retardant and good crusting performance, and have good flame retardance.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present utility model;
fig. 2 is a schematic diagram of a water blocking conductor structure in the present utility model.
The cable comprises a 1-central cable core, 2-first water-blocking yarns, 3-middle conductors, 4-first semiconducting water-blocking tapes, 5-second water-blocking yarns, 6-outer conductors, 7-second semiconducting water-blocking tapes, 8-conductor shielding layers, 9-insulating layers, 10-insulating shielding layers, 11-first water-blocking tapes, 12-metal shielding layers, 13-second water-blocking tapes, 14-inner liners, 15-third water-blocking tapes, 16-armor layers, 17-wrapping tape layers, 18-outer sheath layers and 19-water-blocking conductors.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1-2, the embodiment discloses a medium-voltage longitudinal water-blocking high-flame-retardance power cable, which comprises a cable core, wherein a water-blocking conductor 19, a conductor shielding layer 8, an insulating layer 9 and an insulating shielding layer 10 are sequentially arranged in the cable core from inside to outside, a metal shielding layer 12, an inner liner layer 14, an armor layer 16, a wrapping tape layer 17 and an outer sheath layer 18 are sequentially arranged outside the cable core, the water-blocking conductor 19 comprises a central wire core 1, a middle layer conductor 3 and an outer layer conductor 6, the middle layer conductor is wound outside the central wire core, the outer layer conductor is wound outside the middle layer conductor, a first water-blocking yarn 2 is wound outside the central wire core 1, a first semiconducting water-blocking tape 4 is wound outside the middle layer conductor 3 in a gap, a second water-blocking yarn 5 is wound along the middle layer conductor, and a second semiconducting water-blocking tape 7 is wound outside the outer layer conductor 6 in an overlapping mode.
As shown in fig. 1, the water-blocking conductor 19 is a cylindrical compressed stranded copper conductor, three layers of the conductor shielding layer 8, the insulating layer 9 and the insulating shielding layer 10 outside the water-blocking conductor 19 are co-extruded and coated outside the water-blocking conductor 19, wherein the conductor shielding layer 8 uses polyolefin as a base material, the insulating layer 9 is a crosslinked polyethylene insulating layer which uses polyethylene as a base material and peroxidation as a crosslinking agent, the insulating shielding layer 10 uses polyolefin as a base material, the nominal thickness of the conductor shielding layer 8 is 0.7mm, the nominal thickness of the insulating layer 9 is 4.5mm, and the thinnest point at any position of the insulating layer 6 is not less than 90% -0.1mm of the nominal value.
As shown in fig. 1, the metal shielding layer 12 is formed by overlapping and wrapping a layer by soft copper strips, and is reversely tied on the surface of a copper wire by copper strips, so that the requirement of short-circuit current can be met, a first water blocking strip 11 is arranged between the metal shielding layer 12 and the insulating shielding layer 10, and the first water blocking strip 11 is wrapped outside the insulating shielding layer 10 and serves as a buffer layer between the metal shielding layer 12 and the insulating shielding layer 10.
As shown in fig. 1, the inner liner 14 is made of a low-smoke halogen-free material with high flame retardant and good crusting performance, the second water-blocking tape 13 is wrapped outside the metal shielding layer 12, and the inner liner 14 is uniformly and tightly extruded on the surface of the second water-blocking tape 13.
As shown in fig. 1, the armor layer 16 is a non-magnetic metal tape armor layer, the third water-blocking tape 15 is wrapped outside the inner liner 14, and the armor layer 16 is tightly wound outside the third water-blocking tape 15 by adopting a non-magnetic metal tape, so that the cable can be prevented from heating due to overlarge eddy current loss, the current-carrying condition is reduced, and a certain short-circuit current can be borne.
As shown in fig. 1, the overlap ratio of the first, second, and third water blocking tapes 11, 13, and 15 is not less than 10%.
As shown in fig. 1, the wrapping band layer 17 is a layer of wrapping water-blocking tape, the armor layer 16 is tightly wrapped by the wrapping band layer 17, and the covering rate of the wrapping band layer 17 is not less than 25%.
As shown in fig. 1, the outer sheath layer 18 is made of a low-smoke halogen-free material with good high flame retardant crusting performance, the outer sheath layer 18 is uniformly and tightly coated on the outer surface of the wrapping tape layer 17, the nominal thickness of the outer sheath layer 18 is 2.0mm, and the thinnest point is not less than 80-0.2 mm of the nominal value, so that the requirement of high flame retardance can be met.
When the cable is used, two first water blocking yarns 2 are wound outside the central wire core 1, meanwhile, a middle layer conductor 3 is wound outside the central wire core 1, a first semiconducting water blocking tape 4 is wound outside the middle layer conductor 3 in a gap mode and along one second water blocking yarn 5, meanwhile, an outer layer conductor 6 is wound outside the middle layer conductor 3, a second semiconducting water blocking tape 7 is wound outside the outer layer conductor 6 in an overlapping mode, a water blocking conductor 19 is formed by the central wire core 1, the middle layer conductor 3 and the outer layer conductor 6, a conductor shielding layer 8, an insulating layer 9 and an insulating shielding layer 10 are sequentially arranged outside the water blocking conductor 19, and a first water blocking tape 11, a metal shielding layer 12, a second water blocking tape 13, an inner liner 14, a third water blocking tape, an armor layer 16, a wrapping tape layer 17 and an outer sheath layer 18 are sequentially arranged outside the insulating shielding layer 10 to form the cable.
In the description of the present utility model, it should be understood that the terms "center," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present utility model.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (8)
1. The medium-voltage longitudinal water-blocking high-flame-retardance power cable comprises a cable core and is characterized in that a water-blocking conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially arranged in the cable core from inside to outside, and a metal shielding layer, an inner liner layer, an armor layer, a wrapping tape layer and an outer sheath layer are sequentially arranged outside the cable core;
the water-blocking conductor comprises a central wire core, a middle conductor and an outer conductor, the middle conductor is wound outside the central wire core, the outer conductor is wound outside the middle conductor, a first water-blocking yarn is wound outside the central wire core, a first semiconductor water-blocking tape is wound in an outer gap of the middle conductor, a second water-blocking yarn is wound along the outer gap of the middle conductor, and a second semiconductor water-blocking tape is wound outside the outer conductor in a overlapping mode.
2. A medium voltage longitudinal water blocking high flame retardant power cable according to claim 1, wherein the water blocking conductor is a cylindrical compacted stranded copper conductor.
3. A medium voltage longitudinal water blocking high flame retardant power cable according to claim 1, wherein the metallic shielding layer is composed of a soft copper tape overlapping and wrapped around and reversely tied up on the surface of the copper wire by a copper tape, and a first water blocking tape is wrapped between the metallic shielding layer and the insulating shielding layer.
4. A medium-voltage longitudinal water-blocking high-flame-retardant power cable according to claim 3, wherein the inner liner is made of a low-smoke halogen-free material with good high flame-retardant crusting performance, a second water-blocking tape is wrapped between the inner liner and the metal shielding layer, and the inner liner is tightly extruded on the second water-blocking tape outside the metal shielding layer.
5. The medium-voltage longitudinal water-blocking high-flame-retardant power cable according to claim 4, wherein the armor layer is armored by a non-magnetic metal belt, a third water-blocking belt is wrapped between the armor layer and the inner liner layer, and the armor layer is closely arranged on the third water-blocking belt outside the inner liner layer.
6. The medium voltage, longitudinal water and high flame retardant power cable of claim 5, wherein the overlap ratio of the first, second and third water blocking tapes is not less than 10%.
7. The medium-voltage longitudinal water-blocking high-flame-retardant power cable according to claim 1, wherein the wrapping tape layer is a layer of wrapping water-blocking tape, and the covering rate of the wrapping tape layer is not less than 25%.
8. The medium-voltage longitudinal water-blocking high-flame-retardant power cable according to claim 1, wherein the outer sheath layer is made of a low-smoke halogen-free material with good high flame-retardant crusting performance, and the nominal thickness of the outer sheath layer is 2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320308282.6U CN220121529U (en) | 2023-02-24 | 2023-02-24 | Medium-voltage longitudinal water-blocking high-flame-retardance power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320308282.6U CN220121529U (en) | 2023-02-24 | 2023-02-24 | Medium-voltage longitudinal water-blocking high-flame-retardance power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220121529U true CN220121529U (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320308282.6U Active CN220121529U (en) | 2023-02-24 | 2023-02-24 | Medium-voltage longitudinal water-blocking high-flame-retardance power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220121529U (en) |
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2023
- 2023-02-24 CN CN202320308282.6U patent/CN220121529U/en active Active
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