CN109251392A - A kind of water-tree-resistantmedium medium voltage crosslinked cable - Google Patents
A kind of water-tree-resistantmedium medium voltage crosslinked cable Download PDFInfo
- Publication number
- CN109251392A CN109251392A CN201810920599.9A CN201810920599A CN109251392A CN 109251392 A CN109251392 A CN 109251392A CN 201810920599 A CN201810920599 A CN 201810920599A CN 109251392 A CN109251392 A CN 109251392A
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- parts
- insulating materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- 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
- H01B7/2813—Protection against damage caused by electrical, chemical or water tree deterioration
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The invention discloses a kind of water-tree-resistantmedium medium voltage crosslinked cables, including cable core, cable core is by insulating materials, conductor and insulation three kinds of materials of semiconductive shieldin material extrude arrangement, its sequence from inside to outside is conductor, insulating materials, insulator-semiconductor electrical shielding material, insulating materials is crosslinked polyethylene, the specialist additive that can improve the water repellent potential energy of crosslinked polyethylene molecule is increased in insulating materials, its composition for adding the insulating materials after specialist additive are as follows: LDPE is 80-120 parts, water resistant tree additive ethylene acrylic acid co polymer EAA is 1-2 parts, D-sorbite DBS is 0-1 parts, three allyl rouge of assistant crosslinking agent cyanuric acid is 1.2-2.3 parts, crosslinking agent cumyl peroxide DCP is 1.7-2.7 parts, antioxidant 300 is 2.2-3.4 parts, phenolphthalein 1-1.2 Part.The present invention effectively reduces damage of the cable water tree to cable reliability, greatly reduces direct, indirect economic loss caused by power supply line's short trouble.
Description
Technical field
The invention belongs to middle pressure crosslinked cable technical fields more particularly to a kind of water-tree-resistantmedium medium voltage to be crosslinked.
Background technique
China's midium voltage cable (6kV-66kv) is mainly using commonly crosslinked polyetylene insulated at present, in the formula of Insulation Material
It also added the components such as antioxidant, stabilizer, crosslinking accelerator, to optimize cable end properties.Crosslinking method was mainly
Oxide crosslinking, that is, use linear low density polyethylene resin, seized by force by the active group that peroxide cross-linking agent is decomposed to form
Hydrogen atom on polyethylene molecule forms activity and is good for, and then forms the cross-linked structure of spatial networks, and cross-linking process is being full of nitrogen
High temperature and pressure pipeline in carry out.Cable conductor is outer and insulating layer extrudes one layer of semi-conductive screen using three-layer co-extruded technique outside
Layer, wrapped one layer of metallic copper band shielded layer outside insulating layer, it is steel outside cable core that three-core cable, which uses disc type stranding machine back twist stranding,
Oversheath with armouring sheath and cable.The midium voltage cable product of prior art production, insulating layer use the common poly- second of crosslinking
Alkene CABLE MATERIALS can generate insulation micropore, impurity in production process, and water or steam can invade in cable long-term use process
Cable insulation, and combined with insulation micropore, the micropore with steam can generate water tree under the action of high-voltage alternating electric field
Branch, and then electricity tree breakdown occurs, destroy cable.Meeting will be big in the time using 8 to 12 years for the cable of prior art production
The electrical strength of the growth of volume production unboiled water branch, cable declines about 25%-50%, leads to cable breakdown frequent accident, passes through
Ji loss is huge, while cable chance failure will cause cable run large-area power-cuts, caused by indirect economic loss it is huger
Greatly.
Summary of the invention
For the above the deficiencies in the prior art, the invention proposes a kind of water-tree-resistantmedium medium voltage crosslinked cables, solve insulation
The micropore that layer generates combines with steam and forms water tree and destroy cable, cause the technical issues of economic loss.
Technical scheme is as follows:
The purpose of the present invention is to provide a kind of water-tree-resistantmedium medium voltage crosslinked cables, including cable core, and the cable core is by insulation material
Material, conductor and insulation three kinds of materials of semiconductive shieldin material extrude arrangement, and sequence from inside to outside is conductor, insulating materials, exhausted
Edge semi-conductor electricity shielding material, the insulating materials are to increase that the poly- second of crosslinking can be improved in insulating materials described in crosslinked polyethylene
The specialist additive of the water repellent potential energy of alkene molecule, the additive are water resistant tree additive ethylene acrylic acid co polymer, addition
The composition of insulating materials after specialist additive are as follows:
LDPE is 80-120 parts, and water resistant tree additive ethylene acrylic acid co polymer EAA is 1-2 parts, and D-sorbite DBS is 0-
1 part, three allyl rouge of assistant crosslinking agent cyanuric acid is 1.2-2.3 parts, and crosslinking agent cumyl peroxide DCP is 1.7-2.7 parts, is resisted
Oxygen agent 300 is 2.2-3.4 parts, 1-1.2 parts of phenolphthalein.
Further, the specialist additive composition are as follows: LDPE is 100 parts, water resistant tree additive ethylene-acrylic acid copolymer
Object EAA is 1.5 parts, and D-sorbite DBS is 0.5 part, and three allyl rouge of assistant crosslinking agent cyanuric acid is 1.7 parts, crosslinking agent peroxidating
Diisopropylbenzene (DIPB) DCP is 2.2 parts, and antioxidant 300 is 2.8 parts, 0.8 part of phenolphthalein.
Further, the conductor and insulator-semiconductor electrical shielding material are all made of the smooth inside and outside of high-precision low stripping force
Semiconductive shieldin material, and the range of its peeling force is 4N-12N.
Further, the plastic-aluminum comprehensive waterproof sheath of one layer of embossing longitudinal wrap structure is also wrapped up outside the cable core.
Further, the embossing longitudinal wrap structure uses the two-sided aluminium strip for being compounded with EVA adhesive layer.
Beneficial effects of the present invention: the specialist additive that the present invention uses can improve the water repellent gesture of crosslinked polyethylene molecule
Can, the combination of hydrone and micropore can be prevented, so that insulating layer will not generate water tree under the action of high-voltage alternating electric field,
To reduce cable breakdown accident and cause economic loss, while also increasing the service life save the cost of cable.The present invention
Used specialist additive makes, and configuration is simple, convenient for production at low cost, increases cable service life, effectively reduces cable
Damage of the water tree to cable reliability greatly reduces direct, indirect economic loss caused by power supply line's short trouble,
Economic benefit is huge.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
A kind of water-tree-resistantmedium medium voltage crosslinked cable, including cable core, the cable core is by insulating materials, conductor and insulation semiconductive screen
It covers three kinds of materials of material and extrudes arrangement, sequence from inside to outside is conductor, insulating materials, insulator-semiconductor electrical shielding material, institute
Stating insulating materials is crosslinked polyethylene, increases the spy that can improve the water repellent potential energy of crosslinked polyethylene molecule in the insulating materials
Kind additive, the additive are water resistant tree additive ethylene acrylic acid co polymer, the insulation material after adding specialist additive
The composition of material are as follows:
LDPE is 80-120 parts, and water resistant tree additive ethylene acrylic acid co polymer EAA is 1-2 parts, and D-sorbite DBS is 0-
1 part, three allyl rouge of assistant crosslinking agent cyanuric acid is 1.2-2.3 parts, and crosslinking agent cumyl peroxide DCP is 1.7-2.7 parts, is resisted
Oxygen agent 300 is 2.2-3.4 parts, 1-1.2 parts of phenolphthalein.Increasing specialist additive makes micropore and impurity in insulating layer will not be with water
Vapour combines, so that insulating layer enters steam in cable long-time use process will not be in the work of high-voltage alternating electric field
With lower formation water tree.
Further, the specialist additive composition are as follows: LDPE is 100 parts, water resistant tree additive ethylene-acrylic acid copolymer
Object EAA is 1.5 parts, and D-sorbite DBS is 0.5 part, and three allyl rouge of assistant crosslinking agent cyanuric acid is 1.7 parts, crosslinking agent peroxidating
Diisopropylbenzene (DIPB) DCP is 2.2 parts, and antioxidant 300 is 2.8 parts, 0.8 part of phenolphthalein.So that specialist additive allows polyethylene molecule
Water repellent potential energy reaches maximum, and more thorough tissue steam is in conjunction with micropore.
Further, the conductor and insulator-semiconductor electrical shielding material are all made of the smooth inside and outside of high-precision low stripping force
Semiconductive shieldin material, and the range of its peeling force is 4N-12N.The wedge angle of semiconductive shielding layer or insertion also can mutually be tied with steam
Conjunction forms water tree and causes to puncture, and using the smooth inside and outside semiconductive shieldin material of high-precision low stripping force, which can effectively subtract
Wedge angle, particle, the micropore of not a half conductive shield and insulation interlayer reduce the source that moisture accumulation generates water tree.
Further, the plastic-aluminum comprehensive waterproof sheath of one layer of embossing longitudinal wrap structure is also wrapped up outside the cable core.Effectively prevent
Water or hydrone penetrate into the insulation position of cable after cable installation, and the environmental factor and water tree for reducing water tree generation occur
Necessary condition.Aluminium strip after longitudinal wrap has good flexural property in cable construction and production process, and (15 times of cables are straight
Diameter), easy damaged, does not improve the integrality and moisture-resisting water-proof effect of cable moisture-barrier sheath.
Further, the embossing longitudinal wrap structure uses the two-sided aluminium strip for being compounded with EVA adhesive layer, and continues through embossing
Gear hobbing embossing depth is greater than 3mm, and the cable core of aluminium strip and cable after embossing enters bridging type longitudinal wrap mold together, so that rolls
Line aluminium strip, contacts even closer with cable core, and parcel location is more accurate.Graining aluminium strip meeting forming covered is outside cable core, then passes through
It is directly entered cross-head after one round sizing mold forming, packet of the adhesive film EVA on aluminium strip in the PE material for melting state
It can be thermally bonded together during covering, water or hydrone penetrate into the insulation position of cable after effectively cable being prevented to install.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (5)
1. a kind of water-tree-resistantmedium medium voltage crosslinked cable, including cable core, the cable core is by insulating materials, conductor and insulation semi-conductive screen
Expect that three kinds of materials extrude arrangement, sequence from inside to outside is conductor, insulating materials, insulator-semiconductor electrical shielding material, described
Insulating materials is crosslinked polyethylene, which is characterized in that refusing for crosslinked polyethylene molecule can be improved by increasing in the insulating materials
The specialist additive of water potential energy, the additive are water resistant tree additive ethylene acrylic acid co polymer, add specialist additive
The composition of insulating materials afterwards are as follows:
LDPE is 80-120 parts, and water resistant tree additive ethylene acrylic acid co polymer EAA is 1-2 parts, and D-sorbite DBS is 0-1 parts,
Three allyl rouge of assistant crosslinking agent cyanuric acid is 1.2-2.3 parts, and crosslinking agent cumyl peroxide DCP is 1.7-2.7 parts, antioxidant
300 be 2.2-3.4 parts, 1-1.2 parts of phenolphthalein.
2. a kind of water resistant tree crosslinked cable according to claim 1, which is characterized in that the specialist additive composition are as follows:
LDPE is 100 parts, and water resistant tree additive ethylene acrylic acid co polymer EAA is 1.5 parts, and D-sorbite DBS is 0.5 part, helps crosslinking
Three allyl rouge of agent cyanuric acid is 1.7 parts, and crosslinking agent cumyl peroxide DCP is 2.2 parts, and antioxidant 300 is 2.8 parts, phenol
0.8 part of phthalein.
3. a kind of water resistant tree crosslinked cable according to claim 1, which is characterized in that the conductor and insulator-semiconductor electric screen
The smooth inside and outside semiconductive shieldin material that material is all made of high-precision low stripping force is covered, and the range of its peeling force is 4N-12N.
4. a kind of water resistant tree crosslinked cable according to claim 1, which is characterized in that also wrap up one layer of embossing outside the cable core
The plastic-aluminum comprehensive waterproof sheath of longitudinal wrap structure.
5. a kind of water resistant tree crosslinked cable according to claim 4, which is characterized in that the embossing longitudinal wrap structure is using two-sided
It is compounded with the aluminium strip of EVA adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810920599.9A CN109251392A (en) | 2018-08-14 | 2018-08-14 | A kind of water-tree-resistantmedium medium voltage crosslinked cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810920599.9A CN109251392A (en) | 2018-08-14 | 2018-08-14 | A kind of water-tree-resistantmedium medium voltage crosslinked cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109251392A true CN109251392A (en) | 2019-01-22 |
Family
ID=65050115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810920599.9A Pending CN109251392A (en) | 2018-08-14 | 2018-08-14 | A kind of water-tree-resistantmedium medium voltage crosslinked cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN109251392A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004601A (en) * | 2021-02-26 | 2021-06-22 | 江西洪茂线缆有限公司 | Crosslinked polyethylene cable material and preparation method thereof |
| CN115772080A (en) * | 2022-12-08 | 2023-03-10 | 哈尔滨理工大学 | Preparation method and application of acrylic acid modified sorbitol water tree inhibitor |
Citations (5)
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|---|---|---|---|---|
| EP1092752A2 (en) * | 1999-10-07 | 2001-04-18 | Servicios Condumex S.A. De C.V. | Polymer composition |
| CN101104713A (en) * | 2006-07-12 | 2008-01-16 | 上海电缆研究所 | Water tree resistant polyolefin electrical insulation composition |
| CN100592435C (en) * | 2008-05-29 | 2010-02-24 | 黄东东 | Water resistance tree medium voltage insulated cable material and cable |
| CN103732677A (en) * | 2011-08-08 | 2014-04-16 | Lg化学株式会社 | Crosslinked polyethylene composition |
| CN204991261U (en) * | 2015-08-07 | 2016-01-20 | 重庆瑞普电气实业股份有限公司 | Middling pressure waterproofing type cable |
-
2018
- 2018-08-14 CN CN201810920599.9A patent/CN109251392A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1092752A2 (en) * | 1999-10-07 | 2001-04-18 | Servicios Condumex S.A. De C.V. | Polymer composition |
| CN101104713A (en) * | 2006-07-12 | 2008-01-16 | 上海电缆研究所 | Water tree resistant polyolefin electrical insulation composition |
| CN100592435C (en) * | 2008-05-29 | 2010-02-24 | 黄东东 | Water resistance tree medium voltage insulated cable material and cable |
| CN103732677A (en) * | 2011-08-08 | 2014-04-16 | Lg化学株式会社 | Crosslinked polyethylene composition |
| CN204991261U (en) * | 2015-08-07 | 2016-01-20 | 重庆瑞普电气实业股份有限公司 | Middling pressure waterproofing type cable |
Non-Patent Citations (2)
| Title |
|---|
| 周庆，张志贤主编: "《安装工程材料手册》", 31 March 2004, 中国计划出版社 * |
| 武卫莉主编: "《电线电缆加工工艺学》", 31 October 2014, 哈尔滨工业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004601A (en) * | 2021-02-26 | 2021-06-22 | 江西洪茂线缆有限公司 | Crosslinked polyethylene cable material and preparation method thereof |
| CN115772080A (en) * | 2022-12-08 | 2023-03-10 | 哈尔滨理工大学 | Preparation method and application of acrylic acid modified sorbitol water tree inhibitor |
| CN115772080B (en) * | 2022-12-08 | 2023-07-14 | 哈尔滨理工大学 | Preparation method and application of acrylic acid modified sorbitol water tree inhibitor |
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Application publication date: 20190122 |