CN112420267A - Cable with a protective layer - Google Patents
Cable with a protective layer Download PDFInfo
- Publication number
- CN112420267A CN112420267A CN201910771235.3A CN201910771235A CN112420267A CN 112420267 A CN112420267 A CN 112420267A CN 201910771235 A CN201910771235 A CN 201910771235A CN 112420267 A CN112420267 A CN 112420267A
- Authority
- CN
- China
- Prior art keywords
- cable
- water
- layer
- conductor
- blocking
- 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.)
- Pending
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Classifications
-
- 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
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- 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
- H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
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- 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
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Insulated Conductors (AREA)
- Flexible Shafts (AREA)
Abstract
A cable comprises at least three cable cores, and a filling layer, a water blocking layer, a composite layer and an outer sheath which are sequentially coated outside the at least three cable cores, wherein each cable core comprises a water blocking conductor, a conductor shielding layer, an insulating shielding layer, a first water blocking tape, a shielding layer, a second water blocking tape, a first composite tape and a first sheath which are sequentially coated from inside to outside, the first sheath is tangent to the filling layer, the outer sides of the at least three cable cores are tangent to form an accommodating space, and a water blocking filling rope is filled in the accommodating space. According to the cable provided by the invention, each layer can block water from the outer sheath to the inner water blocking conductor, so that the cable has better water blocking performance, can prevent moisture from longitudinally and radially invading the cable in multiple and high-efficiency manners, and ensures the operation safety of the cable.
Description
Technical Field
The invention relates to the field of manufacturing of wires and cables, in particular to a cable.
Background
Due to construction requirements, part of the cable needs to be laid in water for a long time. Therefore, if the water-blocking effect of the cable is poor, water trees are easily generated on insulation by water vapor in the long-time running process of the cable, the insulation causes breakdown, the service life of the cable is greatly shortened due to the existence of moisture, and the cable must have extremely high water-blocking performance aiming at the laying environment. The common three-core water-blocking cable can only longitudinally block water for the conductor and each layer, and cannot radially block water. Meanwhile, due to the large cabling gap, the used filling cannot effectively prevent water from longitudinally invading, and meanwhile, the used sheath material cannot effectively prevent water from radially entering.
Disclosure of Invention
In view of the above, it is desirable to provide a cable capable of effectively preventing moisture from entering.
A cable comprises at least three cable cores, and a filling layer, a water blocking layer, a composite layer and an outer sheath which are sequentially coated outside the at least three cable cores, wherein each cable core comprises a water blocking conductor, a conductor shielding layer, an insulating shielding layer, a first water blocking tape, a shielding layer, a second water blocking tape, a first composite tape and a first sheath which are sequentially coated from inside to outside, the first sheath is tangent to the filling layer, the outer sides of the at least three cable cores are tangent to form an accommodating space, and a water blocking filling rope is filled in the accommodating space.
Furthermore, the water blocking conductor comprises a central conductor and a plurality of outer conductor layers which are sequentially twisted by taking the central conductor as an axis, and each outer conductor layer is formed by twisting a plurality of conductors by taking the central conductor as the axis.
Furthermore, a semi-conductive water blocking tape is arranged between the central conductor and each outer conductor layer to prevent moisture from longitudinally invading the water blocking conductor.
Furthermore, the conductor shielding layer is wrapped on the water-blocking conductor in an extruded mode by adopting a semi-conductive material.
Furthermore, the insulating layer is uniformly wrapped on the conductor shielding layer by adopting a cross-linked polyethylene material in an extruding way.
Furthermore, the insulation shielding layer comprises insulation wire cores, and a semi-conducting layer which is directly extruded on the outer surface of each insulation wire core and is tightly combined with the insulation wire cores or can be stripped is adopted.
Further, the first sheath, the filling layer and the outer sheath are made of polyethylene materials.
Furthermore, the shielding layer is a copper wire shielding layer.
Further, the composite layer is an aluminum-plastic composite belt or a lead sleeve.
Further, the first water-blocking tape and the second water-blocking tape are both double-sided semi-conductive water-blocking tapes.
Compared with the prior art, the cable comprises at least three cable cores and the filling layer, the water blocking layer, the composite layer and the outer sheath which are sequentially coated outside the at least three cable cores, the water blocking conductor is arranged from the outer sheath to the inner water blocking conductor, each layer can block water, the better water blocking performance is achieved, moisture can be prevented from longitudinally and radially invading the cable in a multiple and efficient mode, and the operation safety of the cable is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a cable according to an embodiment of the present invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, the cable 100 shown in fig. 1 is used for transmitting electric energy, and the cable 100 includes at least three cable cores 10, and a filling layer 20, a water blocking layer 30, a composite layer 40, and an outer sheath 50 sequentially covering the at least three cable cores 10.
Each cable core 10 includes a water blocking conductor 11 and a conductor shielding layer 12 sleeved outside the water blocking conductor 11, and the water blocking conductor 11 includes a central conductor (not shown) and a plurality of outer conductor layers (not shown) twisted in sequence with the central conductor as an axis. Each of the outer conductor layers is formed by twisting a plurality of conductors around a central conductor, and a semi-conductive water-blocking tape is arranged between the central conductor and each of the outer conductor layers, so that moisture is effectively prevented from longitudinally invading the water-blocking conductor 11. The conductor shielding layer 12 is wrapped on the water blocking conductor by adopting a semi-conductive material to prevent the water blocking conductor 11 from generating partial discharge. The outer side of the conductor shielding layer 12 is sleeved with an insulating layer 13, the insulating layer 13 has an insulating effect, and in an embodiment, the insulating layer 13 is uniformly extruded on the conductor shielding layer 12 by using a cross-linked polyethylene material. The insulating layer 13 is sleeved with an insulating and shielding layer 14, and in an embodiment, the insulating and shielding layer 14 comprises insulating wire cores, and then a semi-conducting layer which is directly extruded on the outer surface of each insulating wire core and is tightly combined with or can be stripped from the insulating wire core is adopted. The insulating and shielding water-blocking waterproof structure is characterized in that a first water-blocking tape 15 is wound on the outer side of the insulating and shielding layer 14 in a sleeved mode, a shielding layer 16 is wound on the outer side of the first water-blocking tape 15 in a sleeved mode, a second water-blocking tape 17 is wound on the outer side of the shielding layer 16 in a sleeved mode, in one embodiment, the shielding layer 16 is a copper wire shielding layer, and the first water-blocking tape 15 and the second water-blocking tape 17 are double-sided semi-conductive water-blocking tapes. The first water-blocking tape 15 and the second water-blocking tape 17 swell with water, so that moisture is effectively prevented from longitudinally invading the inside of the cable 100 along the copper wire gap. The second water-blocking tape 17 is wrapped with a first composite tape 18, and the first composite tape 18 can assist the shielding layer 16, carry partial short-circuit current, and effectively prevent moisture from radially invading from the cable 100. In one embodiment, the first composite tape 18 may be an aluminum-plastic composite tape or a lead sheath. A first sheath 19 is sleeved outside the first composite belt 18, and the first sheath 19 is tangent to the filling layer 20 and used for blocking water. In one embodiment, the first sheath 19 is made of polyethylene material, and the polyethylene material has strong water-blocking performance and effectively prevents moisture from radially invading.
The cable core 10 further includes a water-blocking filling rope 101, the outer sides of the at least three cable cores are tangentially arranged to form an accommodating space (not numbered), and the water-blocking filling rope is filled in the accommodating space. The water-blocking filling rope 101 rapidly expands when encountering water, and prevents water from longitudinally invading the cable core 10. In an embodiment, the number of the cable cores 10 is three, the cross sections of the three cable cores 10 are arranged in a tangent manner, and water-blocking filling ropes 101 are filled in gaps formed by the tangent three cable cores 10.
The filling layer 20 is sleeved outside the cable core 10, and in an embodiment, the filling layer 20 is made of polyethylene material and is produced by die extrusion. A filler 21 is disposed in a gap formed between the filler layer 20 and the cable core 10, and in one embodiment, the filler 21 is integrally disposed with the filler layer 20 and is made of polyethylene. The polyethylene material has high compactness and stronger water resistance, and can prevent moisture from longitudinally and radially invading.
The water-blocking layer 30 is sleeved on the outer side of the filling layer 20, in an embodiment, the water-blocking layer 30 is wrapped on the outer layer of the filling layer 20 by a double-sided insulating water-blocking tape, and the water-blocking layer 30 expands when meeting water, so that moisture is effectively prevented from longitudinally invading the cable 100.
The composite layer 40 is sleeved on the outer side of the water-blocking layer 30, and when the cable 100 is damaged by external force, the composite layer 40 can prevent external moisture from radially invading into the cable. In one embodiment, the composite layer 40 is a lead sheath, which has high compactness, can effectively prevent water from radially invading, and can also carry partial short-circuit current. In other embodiments, the composite layer 40 may also be an aluminum-plastic composite tape.
The outer sheath 50 is sleeved outside the composite layer 40, in an embodiment, the outer sheath 50 is made of a polyethylene material, the polyethylene material is hard and is not easy to break in a construction process, meanwhile, the water blocking effect is good, and moisture is effectively prevented from radially invading the cable 100.
When the cable 100 is used, the water blocking conductor 11, the first water blocking tape 15, the second water blocking tape 17, the first composite tape 18, the first sheath 19, the filling layer 20, the water blocking filling rope 101, the water blocking layer 30, the composite layer 40 and the outer sheath 50 all have water blocking performance, multiple water blocking is achieved from the outer sheath 50 to the inner water blocking conductor 11, and multiple protection is achieved on the cable 100. Meanwhile, water-blocking filling ropes 101 are filled among gaps of the cable cores 10 by using an extrusion process, so that the problems of large cabling gaps and poor water-blocking effect are solved.
According to the cable 100, each layer of the cable from the outer sheath 50 to the inner water blocking conductor 11 can block water, so that the cable has better water blocking performance, can prevent moisture from longitudinally and radially invading the cable in multiple and high-efficiency modes, and ensures the operation safety of the cable.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a cable, includes at least three cable core and cladding in proper order the filling layer, the water-blocking layer, composite bed and the oversheath in the at least three cable core outside, its characterized in that: each cable core comprises a water-blocking conductor, a conductor shielding layer, an insulating shielding layer, a first water-blocking tape, a shielding layer, a second water-blocking tape, a first composite tape and a first sheath which are sequentially coated from inside to outside, the first sheath is tangent to the filling layer, the outer sides of at least three cable cores are tangent to form an accommodating space, and a water-blocking filling rope is filled in the accommodating space.
2. The cable of claim 1, wherein: the water blocking conductor comprises a central conductor and a plurality of outer conductor layers which are sequentially twisted by taking the central conductor as an axis, and each outer conductor layer is formed by twisting a plurality of conductors by taking the central conductor as the axis.
3. The cable of claim 2, wherein: and a semi-conductive water blocking tape is arranged between the central conductor and each outer conductor layer to prevent moisture from longitudinally invading the water blocking conductor.
4. The cable of claim 1, wherein: the conductor shielding layer is wrapped on the water-blocking conductor in an extruded mode by adopting a semi-conductive material.
5. The cable of claim 1, wherein: the insulating layer is uniformly wrapped on the conductor shielding layer by adopting a cross-linked polyethylene material in an extruding way.
6. The cable of claim 1, wherein: the insulation shielding layer comprises insulation wire cores, and then a semi-conducting layer which is directly extruded on the outer surface of each insulation wire core and is tightly combined with the insulation wire cores or can be stripped is adopted.
7. The cable of claim 1, wherein: the first sheath, the filling layer and the outer sheath are made of polyethylene materials.
8. The cable of claim 1, wherein: the shielding layer is a copper wire shielding layer.
9. The cable of claim 1, wherein: the composite layer is an aluminum-plastic composite belt or a lead sleeve.
10. The cable of claim 1, wherein: the first water-blocking tape and the second water-blocking tape are both double-sided semi-conductive water-blocking tapes.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771235.3A CN112420267A (en) | 2019-08-21 | 2019-08-21 | Cable with a protective layer |
| AU2020334655A AU2020334655B2 (en) | 2019-08-21 | 2020-06-22 | Cable |
| PCT/CN2020/097525 WO2021031684A1 (en) | 2019-08-21 | 2020-06-22 | Power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771235.3A CN112420267A (en) | 2019-08-21 | 2019-08-21 | Cable with a protective layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112420267A true CN112420267A (en) | 2021-02-26 |
Family
ID=74659925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910771235.3A Pending CN112420267A (en) | 2019-08-21 | 2019-08-21 | Cable with a protective layer |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112420267A (en) |
| AU (1) | AU2020334655B2 (en) |
| WO (1) | WO2021031684A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114156008A (en) * | 2021-12-06 | 2022-03-08 | 无锡市明珠电缆有限公司 | Medium-voltage variable-frequency power cable matched with high-performance high-capacity frequency converter and preparation method thereof |
| CN115458216A (en) * | 2022-09-26 | 2022-12-09 | 广州南洋电缆集团有限公司 | Waterproof light-weight cable and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT2312591T (en) * | 2009-08-31 | 2020-04-23 | Nexans | Fatigue resistant metallic moisture barrier in submarine power cable |
| CN102945701A (en) * | 2012-11-23 | 2013-02-27 | 张家港市港通光电科技有限公司 | Cable |
| CN203552781U (en) * | 2013-10-24 | 2014-04-16 | 扬州曙光电缆股份有限公司 | A crosslinked polyethylene insulating waterproof power cable |
| CN203812613U (en) * | 2014-02-17 | 2014-09-03 | 黄灵锐 | Waterproof corrosion-resistant cable |
| CN205722924U (en) * | 2016-04-25 | 2016-11-23 | 无锡市曙光电缆有限公司 | A kind of anticorrosion blocks water power cable with cross-linked polyethylene insulation |
| CN208781601U (en) * | 2018-07-17 | 2019-04-23 | 浙江万马股份有限公司 | Three core environment-friendly type waterproof power cables of 35kV and following middle pressure |
-
2019
- 2019-08-21 CN CN201910771235.3A patent/CN112420267A/en active Pending
-
2020
- 2020-06-22 AU AU2020334655A patent/AU2020334655B2/en active Active
- 2020-06-22 WO PCT/CN2020/097525 patent/WO2021031684A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021031684A1 (en) | 2021-02-25 |
| AU2020334655A1 (en) | 2022-03-31 |
| AU2020334655B2 (en) | 2023-06-01 |
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