CN117038189A - Water-blocking type medium-high voltage power cable - Google Patents
Water-blocking type medium-high voltage power cable Download PDFInfo
- Publication number
- CN117038189A CN117038189A CN202310852677.7A CN202310852677A CN117038189A CN 117038189 A CN117038189 A CN 117038189A CN 202310852677 A CN202310852677 A CN 202310852677A CN 117038189 A CN117038189 A CN 117038189A
- Authority
- CN
- China
- Prior art keywords
- water
- core
- conductor
- blocking
- high voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 59
- 239000003292 glue Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/006—Constructional features relating to the conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
- H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
- H01B7/288—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable using hygroscopic material or material swelling in the presence of liquid
Landscapes
- Insulated Conductors (AREA)
Abstract
The invention discloses a water-blocking type medium-high voltage power cable, which comprises a plurality of core cables; the outer sides of the core cables are extruded with isolating sleeves, and the outer sides of the isolating sleeves are sequentially laminated with steel tape armors and sheaths from inside to outside; the core cable comprises a plurality of conductor cores and a semiconductive shielding layer; the semi-conductive shielding layer wraps the conductor cores, and the outer side of the semi-conductive shielding layer is sequentially wrapped with an insulating layer, an insulating semi-conductive shielding layer and a metal shielding layer in a laminated mode. According to the invention, a plurality of conductor molded lines are stranded and closely-packed on the outer peripheral side of the core body, a dense loop structure is formed during stranding and winding by means of the structural characteristics of the conductor molded lines, compared with the traditional cylindrical copper wire stranding, the novel waterproof cable has high compactness, reduces gaps, is favorable for water resistance, is a water-swelling semi-conductive tape arranged on the outer side of the conductor core, can radially block water, and can effectively block water axially by the water-blocking yarns arranged at the end part of the core cable and the waterproof glue arranged at the end part of the cable body, so that the normal working state of the conductor core inside the cable is ensured.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a water-blocking type medium-high voltage power cable.
Background
In the field of high-voltage and ultra-high-voltage cables, the outer side of the existing insulated wire core adopts a semiconductive buffer waterproof layer longitudinal water-blocking structure and a metal sheath longitudinal water-blocking structure due to the specificity of products. Thus, the insulation shielding layer can be prevented from being contacted with water or being affected by damp to influence the insulation performance and the service life of the cable. However, once the insulating shielding layer of the cable is damaged or the joint fails, water can infiltrate into the conductor, so that the whole cable cannot be used, the loss is high,
chinese patent CN201220112496.8 discloses a water-blocking high-voltage cable, which can use water-blocking powder to fill the conductor gap, but because the circular single gap is larger, on one hand, the tightness is not good, on the other hand, a large amount of water-blocking powder is needed, the strength of the cable cannot be ensured, and the water-blocking performance is poor.
Therefore, how to provide a water-blocking medium-high voltage power cable with better water blocking performance by changing the internal structure of the cable so as to be more compact is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a water-blocking medium-high voltage power cable which can reduce gaps in a conductor core and can better block water.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a water-blocking type medium-high voltage power cable comprises a plurality of core cables;
the outer sides of the core cables are extruded with isolation sleeves, and steel tape armors and sheaths are sequentially laminated on the outer sides of the isolation sleeves from inside to outside;
the core cable comprises a plurality of conductor cores and a semiconductive shielding layer;
the semi-conductive shielding layer wraps the plurality of conductor cores, and the outer side of the semi-conductive shielding layer is sequentially wrapped with an insulating layer, an insulating semi-conductive shielding layer and a metal shielding layer in a laminated mode.
Further, a cabling tape is arranged between the isolation sleeve and the core cables, and gaps between the cabling tape and the core cables are filled with rubber.
Furthermore, a self-adhesive aluminum-plastic composite layer is arranged between the cabling tape and the isolation sleeve.
The beneficial effect of adopting above-mentioned further scheme lies in: the above-described solution of the invention prevents moisture from penetrating into the cable from the direction perpendicular to the conductors.
Further, the conductor core comprises a core body and a plurality of strands of conductor molded lines;
a plurality of conductor molded lines are stranded and tightly pressed on the outer side of the core body to form a compact annular sleeve structure; and the loop structure is provided with a plurality of layers.
Furthermore, waterproof glue is coated on the outer side of the conductor wire core, and a radial water blocking tape is wrapped on the outer side of the waterproof glue.
Further, the cross section of the conductor molded line is any one of an S type, a wedge type and a Z type; the conductor molded lines are drawn and formed, and the multi-strand conductor molded lines with the same shape are twisted into a loop structure, so that gaps among the conductor molded lines are reduced.
The beneficial effect of adopting above-mentioned further scheme lies in: the multi-strand conductor molded lines of the same shape are twisted into the loop structure, so that gaps among the conductor molded lines are reduced, the original cylindrical shape of the conductor molded lines is changed, gaps among the conductor molded lines can be effectively reduced during twisting, the compactness is good, and the thickness of the conductor core determines the transmission capacity of the cable.
Further, the core body is formed by twisting a single cylindrical copper wire or a plurality of copper wires; wherein gaps among the plurality of copper wires are filled with waterproof glue.
The beneficial effect of adopting above-mentioned further scheme lies in: in the scheme of the invention, the gaps among the plurality of copper wires are filled with waterproof glue, so that the cylindrical structure of the core body is ensured.
Further, the two ends of the core cable are filled with water-blocking yarns for axially blocking water.
Further, waterproof glue is filled at two ends of the cable in a pressurizing mode before the cable is laid, so that gaps are compacted.
The invention has the beneficial effects that: according to the invention, a plurality of conductor molded lines are stranded and closely-packed on the outer peripheral side of the core body, a dense loop structure is formed during stranding and winding by means of the structural characteristics of the conductor molded lines, compared with the traditional cylindrical copper wire stranding, the novel waterproof cable has high compactness, reduces gaps, is favorable for water resistance, is a water-swelling semi-conductive tape arranged on the outer side of the conductor core, can radially block water, and can effectively block water axially by the water-blocking yarns arranged at the end part of the core cable and the waterproof glue arranged at the end part of the cable body, so that the normal working state of the conductor core inside the cable is ensured.
Drawings
FIG. 1 is a block diagram of the entire construction of a water-blocking medium-high voltage power cable of the present invention;
FIG. 2 is a schematic view of a conductor profile of a water-blocking medium-high voltage power cable according to the present invention;
fig. 3 is a schematic diagram of a conductor core of a water-blocking medium-high voltage power cable according to the present invention;
fig. 4 is a second schematic diagram of a conductor core of a water-blocking medium-high voltage power cable according to the present invention.
In the drawings, the structures shown by the reference numerals are as follows:
1-core body, 2-conductor molded line, 3-core cable, 4-isolation sleeve, 5-steel tape armor, 6-sheath, 7-cable wrapping tape and 8-rubber;
31-conductor core, 32-semi-conductive shielding layer, 33-insulating layer, 34-insulating semi-conductive shielding layer, 35-metal shielding layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
A water-blocking type medium-high voltage power cable comprises a plurality of core cables 3;
wherein, the outer sides of the core cables 3 are extruded with the isolating sleeves 4, and the outer sides of the isolating sleeves 4 are sequentially laminated with the steel tape armors 5 and the sheaths 6 from inside to outside;
the core cable 3 comprises a plurality of conductor cores 31 and a semiconductive shielding layer 32;
the semiconductive shielding layer 32 wraps the plurality of conductor cores 31, and the insulating layer 33, the insulating semiconductive shielding layer 34 and the metal shielding layer 35 are sequentially stacked and wrapped on the outer side of the semiconductive shielding layer 32.
In one embodiment, a cabling strap 7 is arranged between the isolation sleeve 4 and the plurality of core cables 3, and gaps between the cabling strap 7 and the plurality of core cables 3 are filled with rubber 8.
In another embodiment, a self-adhesive aluminum-plastic composite layer is arranged between the cabling belt 7 and the isolation sleeve 4.
In one embodiment, the conductor core 31 comprises a core body 1 and a number of strands of conductor wire 2;
a plurality of strand conductor molded lines 2 are stranded and tightly pressed on the outer side of the core body 1 to form a compact loop structure; and the loop structure is provided with a plurality of layers.
In another embodiment, the outer side of the conductor core 31 is coated with waterproof glue, and the outer side of the waterproof glue is wrapped with a radial water blocking tape.
In another embodiment, the cross section of the conductor profile 2 is any one of an S-shape, a wedge-shape and a Z-shape; the conductor molded line 2 is drawn and molded, and the multi-strand conductor molded line with the same shape is twisted into a loop structure.
In another embodiment, the core 1 is formed by twisting a single cylindrical copper wire or a plurality of copper wires; wherein gaps among the plurality of copper wires are filled with waterproof glue.
In one embodiment, both ends of the core cable 3 are filled with an axially water-blocking yarn.
In one embodiment, the cable is filled with waterproof glue under pressure at both ends before it is laid.
The invention changes the structural shape of the conductor molded lines, so that the compactness is high when a plurality of conductor molded lines are twisted, the compactness of the conductor core is increased, the conductor adopts a molded line twisting structure, the conductor copper wires are drawn into single wires with special structures such as T-shaped, S-shaped, Z-shaped and the like, and the conductor with the compact structure is manufactured through integration, twisting, compacting and drawing. And (3) dip-coating a layer of waterproof glue outside the conductor core after shaping and stranding, and wrapping the water-swelling semi-conductive tape after the waterproof glue is dried.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. The water-blocking type medium-high voltage power cable is characterized by comprising a plurality of core cables;
the outer sides of the core cables are extruded with isolation sleeves, and steel tape armors and sheaths are sequentially laminated on the outer sides of the isolation sleeves from inside to outside;
the core cable comprises a plurality of conductor cores and a semiconductive shielding layer;
the semi-conductive shielding layer wraps the plurality of conductor cores, and the outer side of the semi-conductive shielding layer is sequentially wrapped with an insulating layer, an insulating semi-conductive shielding layer and a metal shielding layer in a laminated mode.
2. The water-blocking type medium-high voltage power cable according to claim 1, wherein a cabling tape is arranged between the isolation sleeve and the core cables, and gaps between the cabling tape and the core cables are filled with rubber.
3. The water-blocking type medium-high voltage power cable according to claim 2, wherein a self-adhesive aluminum-plastic composite layer is arranged between the cable-forming wrapping tape and the isolation sleeve.
4. The water-blocking medium-high voltage power cable according to claim 1, wherein the conductor core comprises a core body and a plurality of strands of conductor molded lines;
a plurality of conductor molded lines are stranded and tightly pressed on the outer side of the core body to form a compact annular sleeve structure; and the loop structure is provided with a plurality of layers.
5. The water-blocking medium-high voltage power cable according to claim 4, wherein the outer side of the conductor core is coated with waterproof glue, and a radial water-blocking tape is wrapped on the outer side of the waterproof glue.
6. The water-blocking medium-high voltage power cable according to claim 4, wherein the cross section of the conductor profile is any one of an S type, a wedge type and a Z type; the conductor molded lines are drawn and formed, and the multi-strand conductor molded lines with the same shape are twisted into a loop structure.
7. The water-blocking medium-high voltage power cable according to claim 4, wherein the core is formed by twisting a single cylindrical copper wire or a plurality of copper wires; wherein gaps among the plurality of copper wires are filled with waterproof glue.
8. The water-blocking medium-high voltage power cable according to claim 1, wherein both ends of the core cable are filled with water-blocking yarns that block water axially.
9. The water-blocking medium-high voltage power cable according to claim 1, wherein the cable is filled with waterproof glue under pressure at both ends thereof before being laid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852677.7A CN117038189B (en) | 2023-07-12 | 2023-07-12 | Water-blocking type medium-high voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852677.7A CN117038189B (en) | 2023-07-12 | 2023-07-12 | Water-blocking type medium-high voltage power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117038189A true CN117038189A (en) | 2023-11-10 |
| CN117038189B CN117038189B (en) | 2024-04-26 |
Family
ID=88634435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310852677.7A Active CN117038189B (en) | 2023-07-12 | 2023-07-12 | Water-blocking type medium-high voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117038189B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU99895U1 (en) * | 2010-06-23 | 2010-11-27 | Государственное образовательное учреждение высшего профессионального образования "Пермский государственный технический университет" | POWER HIGH VOLTAGE ARMORED AC CABLE WITH SEPARATELY SCREENED CONDUCTORS |
| CN202487251U (en) * | 2012-03-22 | 2012-10-10 | 广州岭南电缆股份有限公司 | Waterproof high-voltage cable |
| CN203503354U (en) * | 2013-09-24 | 2014-03-26 | 河南开启电力实业有限公司 | watertight water-tree resistance cable |
| CN204066769U (en) * | 2014-05-07 | 2014-12-31 | 江苏通光强能输电线科技有限公司 | A kind of cable molded line compact conductor |
| CN105304191A (en) * | 2014-06-25 | 2016-02-03 | 江苏海达电缆有限公司 | Improved waterproof cable |
| CN105895218A (en) * | 2016-06-14 | 2016-08-24 | 中科电力装备（安徽）智能化科技有限公司 | Tensile waterproof cable |
| RU2653691C1 (en) * | 2017-06-02 | 2018-05-14 | Общество с ограниченной ответственностью НПП "Спецкабель" | Sealed electric cable of pair twisting |
| CN208673791U (en) * | 2018-04-18 | 2019-03-29 | 大连可普乐电缆集团有限公司 | Water repellent electric cable is pressed in one kind |
| CN210271875U (en) * | 2019-09-24 | 2020-04-07 | 无锡市华美电缆有限公司 | Waterproof cable |
| CN115171965A (en) * | 2022-05-07 | 2022-10-11 | 广东坚宝电缆有限公司 | Tensile reinforced shielding control cable |
| CN218602174U (en) * | 2022-09-30 | 2023-03-10 | 安徽尚纬电缆有限公司 | Harbor is with corrosion-resistant medium voltage power cable that blocks water |
-
2023
- 2023-07-12 CN CN202310852677.7A patent/CN117038189B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU99895U1 (en) * | 2010-06-23 | 2010-11-27 | Государственное образовательное учреждение высшего профессионального образования "Пермский государственный технический университет" | POWER HIGH VOLTAGE ARMORED AC CABLE WITH SEPARATELY SCREENED CONDUCTORS |
| CN202487251U (en) * | 2012-03-22 | 2012-10-10 | 广州岭南电缆股份有限公司 | Waterproof high-voltage cable |
| CN203503354U (en) * | 2013-09-24 | 2014-03-26 | 河南开启电力实业有限公司 | watertight water-tree resistance cable |
| CN204066769U (en) * | 2014-05-07 | 2014-12-31 | 江苏通光强能输电线科技有限公司 | A kind of cable molded line compact conductor |
| CN105304191A (en) * | 2014-06-25 | 2016-02-03 | 江苏海达电缆有限公司 | Improved waterproof cable |
| CN105895218A (en) * | 2016-06-14 | 2016-08-24 | 中科电力装备（安徽）智能化科技有限公司 | Tensile waterproof cable |
| RU2653691C1 (en) * | 2017-06-02 | 2018-05-14 | Общество с ограниченной ответственностью НПП "Спецкабель" | Sealed electric cable of pair twisting |
| CN208673791U (en) * | 2018-04-18 | 2019-03-29 | 大连可普乐电缆集团有限公司 | Water repellent electric cable is pressed in one kind |
| CN210271875U (en) * | 2019-09-24 | 2020-04-07 | 无锡市华美电缆有限公司 | Waterproof cable |
| CN115171965A (en) * | 2022-05-07 | 2022-10-11 | 广东坚宝电缆有限公司 | Tensile reinforced shielding control cable |
| CN218602174U (en) * | 2022-09-30 | 2023-03-10 | 安徽尚纬电缆有限公司 | Harbor is with corrosion-resistant medium voltage power cable that blocks water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117038189B (en) | 2024-04-26 |
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