CN109273161A - Double buried cables that block water - Google Patents
Double buried cables that block water Download PDFInfo
- Publication number
- CN109273161A CN109273161A CN201811042648.XA CN201811042648A CN109273161A CN 109273161 A CN109273161 A CN 109273161A CN 201811042648 A CN201811042648 A CN 201811042648A CN 109273161 A CN109273161 A CN 109273161A
- Authority
- CN
- China
- Prior art keywords
- water
- outside
- band
- core
- block
- 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
Links
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
- 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
-
- 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
-
- 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
Abstract
The present invention relates to double buried cables that block water, including core, core includes conductor, wrapped water blocking yarn on the outside of conductor, core outside are arranged the band that blocks water, the rubber that blocks water are filled between core and the band that blocks water, block water band outside setting inner cushion layer, setting steel band and waterstop on the outside of inner cushion layer, waterstop outside are arranged watertight insulation, outer jacket are arranged on the outside of watertight insulation.Water blocking yarn guarantees that the block-water performance of conductor, the rubber that blocks water avoid longitudinal water from migrating, and the band that blocks water is super-strong moisture absorbing expanding material, and waterproof separation sleeve is arranged on the downside of outer jacket, prevents water from extravasating into along middle line from sheath.Compared with the prior art, multiple waterproof is protected, and prevents moisture from entering core, obtains the better cable of block-water effect.
Description
Technical field
The invention belongs to field of cables, and in particular to a kind of double buried cables that block water.
Background technique
In general, moisture is immersed in conductor and the insulation that rear main influence in cable is cable.For conductor, cable
A thermal steady state is in when operating normally, conductor temperature is generally all 60 or more, if there is moisture immersion will lead to
Conductor indium increases transmission line of electricity so that the energy loss resistance between conductor single line increases to increase conductor resistance
Energy loss, for insulation, although polyethylene is extremely difficult to be dissolved in the nonpolar hydrophobic substance of water, polyethylene be it is a kind of by
The Piezoelectricity of crystalline phase and amorphous phase composition.
Polyethylene phase structure is close, but crystal boundary existing defects；Molecules align in amorphous phase is loose.It is intermolecular exist compared with
Big gap.Hydrone be it is polar, extension and the collective effect of electric field force make hydrone be easy to seep under alternating electric field
Thoroughly into the grain boundary defects of the allowance of polyethylene amorphous phase and crystal phase, asked in crosslinked polyethylene molecular structure there is also above-mentioned
Topic, while thering are more cross-linking by-products to serve as impurity in crosslinked polyethylene, thus crosslinked polyethylene also has under alternating electric field
Biggish water absorption rate.Can be generated after crosslinked polyethylene and polyethylene insulation water suction water tree make running cable occur breakdown and
Damage.
The stop water of present China power cable is to be referred from communication cable mostly, is mainly reached by water layer of strengthening defences
Prevent moisture from penetrating into the purpose of insulating layer through sheath.It realizes blocking water comprehensively for cable, not only to consider cable radial direction
Moisture penetration, it is contemplated that along the longitudinal diffusion of cable after effectively moisture being prevented to invade cable.Because if not considering cable
Longitudinal water-blocking, when sheath is poorly sealed or damaged, invading the moisture inside cable can cause whole along cable longitudinal diffusion
Root cable is scrapped, and loss is expanded.
Common cable itself does not have water resistance characteristic, higher or long-term area of heavy rainfull moisture is easily penetrated into level of ground water
Sheath invades inside cable from the breakage of sheath.And cause accident.Early in the 1970s, crosslinked polyetylene insulated
Water tree problem in power cable just causes the very big concern of international cable industry, and has made a large amount of research work.Most
Just mainly consider to be modified crosslinked polyethylene, water is inhibited using the method for addition voltage stabilizer and other additives
The generation of tree.Though this measure has a certain effect but not significant, end can be from solving the problems, such as at all.Later practical experience proves, prevents
Only external moisture intrusion is the optimal path for solving the problems, such as to hand over water tree in polyethylene electric power.
Summary of the invention
The purpose of the present invention is to provide a kind of better double buried cables that block water of block-water effect.
To achieve the above object, of the invention double to block water that the following technical solution is employed for buried cable: double undergrounds electricity that block water
Cable includes core, and core includes conductor, and wrapped water blocking yarn on the outside of conductor, the band that blocks water, core and the packet that blocks water is arranged in core outside
The rubber that blocks water is filled between band, block water band outside setting inner cushion layer, setting steel band and waterstop on the outside of inner cushion layer, outside waterstop
Watertight insulation is arranged in side, and outer jacket is arranged on the outside of watertight insulation.
The utility model has the advantages that water blocking yarn guarantees that the block-water performance of conductor, the rubber that blocks water avoid longitudinal water from migrating, the band that blocks water is super
Strong water uptake expansion material, outer jacket downside are arranged waterproof separation sleeve, prevent water from extravasating into along middle line from sheath.Compared to existing skill
Art, multiple waterproof protection, prevents moisture from entering core, obtains the better cable of block-water effect.
Further, the inner cushion layer and/or outer jacket are polythene material.
Further, the watertight insulation is polythene material.
Further, conductor shield, insulating layer and insulation screen are successively arranged on the outside of the water blocking yarn.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, the accompanying drawings in the following description is only the embodiment of the present invention, common for this field
For technical staff, without any creative labor, it can also be obtained according to these attached drawings other attached drawings；
Fig. 1 is the structural schematic diagram of the specific embodiment of double buried cables that block water of the invention.
In figure: 1- core, 2- block water band, 3- block water rubber, 4- inner cushion layer, 5- steel band and water blocking tape layer, 6- waterproof every
From set, 7- oversheath.
Specific embodiment
In order to keep technical purpose of the invention, technical scheme and beneficial effects clearer, with reference to the accompanying drawing and specifically
Embodiment is further illustrated technical solution of the present invention.
As shown in Figure 1, double buried cables that block water include core 1, core 1 includes conductor, wrapped water blocking yarn on the outside of conductor, line
The band 2 that blocks water is set on the outside of core 1, the rubber 3 that blocks water is filled between core 1 and the band 2 that blocks water, the rubber 3 that blocks water is squeezed using squash type
Out except core 1, inner cushion layer 4 is set on the outside of the band 2 that blocks water, steel band and water blocking tape layer 6 be set on the outside of inner cushion layer 4, steel band and
It blocks water and waterproof separation sleeve 6 is set on the outside of adhesive tape layer 5, oversheath 7 is set on the outside of waterproof separation sleeve 6.
Conductor shield, insulating layer and insulation screen are equipped on core 1 on the outside of water blocking yarn, insulating layer is to be crosslinked poly- second
Alkene material；In addition, the inner cushion layer 4, oversheath 7 and waterproof separation sleeve 6 in this implementation are polythene material.In other embodiments
In, waterproof separation sleeve 6 can also be using low-smoke halogen-free polyolefin set or aluminium-plastic tape polyethylene bonding set etc..
Water blocking yarn guarantees that the block-water performance of conductor, the rubber 3 that blocks water avoid longitudinal water from migrating, and band uses swollen by super-strong moisture absorbing
The band 2 that blocks water of swollen material production, waterproof separation sleeve 6 prevent water from extravasating into along middle line from sheath.Compared with the prior art, have
Multiple-protection prevents moisture from entering core, obtains the better buried cable of block-water effect.
It should be noted last that: technical solution of the present invention that the above embodiments are only illustrative and not limiting is any right
The equivalent replacement and do not depart from the modification of spirit and scope of the invention or locally replace that the present invention carries out, should all cover in this hair
Within bright protective scope of the claims.
Claims (4)
1. pair block water buried cable, it is characterised in that: including core, core includes conductor, wrapped water blocking yarn on the outside of conductor, core
The band that blocks water is arranged in outside, and the rubber that blocks water is filled between core and the band that blocks water, and inner cushion layer, inner cushion layer are arranged on the outside of the band that blocks water
Steel band-waterstop composite layer is arranged in outside, and watertight insulation, watertight insulation outside are arranged on the outside of steel band-waterstop composite layer
Outer jacket is set.
2. double buried cable that blocks water according to claim 1, it is characterised in that: the inner cushion layer and outer jacket are polyethylene
Material.
3. double buried cables that block water according to claim 2, it is characterised in that: the watertight insulation is polyethylene material
Material.
4. double buried cable that blocks water according to claim 1-3, it is characterised in that: the outside of the water blocking yarn according to
It is secondary to be equipped with conductor shield, insulating layer and insulation screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811042648.XA CN109273161A (en) | 2018-09-07 | 2018-09-07 | Double buried cables that block water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811042648.XA CN109273161A (en) | 2018-09-07 | 2018-09-07 | Double buried cables that block water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109273161A true CN109273161A (en) | 2019-01-25 |
Family
ID=65188732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811042648.XA Pending CN109273161A (en) | 2018-09-07 | 2018-09-07 | Double buried cables that block water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109273161A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203366841U (en) * | 2013-06-13 | 2013-12-25 | 辽宁宝林集团大连金州电缆有限公司 | Environment-friendly type crosslinking polyethylene insulating, water-resistant, flame-retardant and shielding power cable |
| CN203706729U (en) * | 2014-02-19 | 2014-07-09 | 扬州市金阳光电缆有限公司 | Water blocking water-tree-resistant medium-voltage power cable |
| CN104575836A (en) * | 2013-10-24 | 2015-04-29 | 扬州曙光电缆股份有限公司 | Cross-linked polyethylene insulated water-blocked power cable |
| CN205984371U (en) * | 2016-08-08 | 2017-02-22 | 中天科技海缆有限公司 | Waterproofing type aluminum alloy medium voltage power cable |
-
2018
- 2018-09-07 CN CN201811042648.XA patent/CN109273161A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203366841U (en) * | 2013-06-13 | 2013-12-25 | 辽宁宝林集团大连金州电缆有限公司 | Environment-friendly type crosslinking polyethylene insulating, water-resistant, flame-retardant and shielding power cable |
| CN104575836A (en) * | 2013-10-24 | 2015-04-29 | 扬州曙光电缆股份有限公司 | Cross-linked polyethylene insulated water-blocked power cable |
| CN203706729U (en) * | 2014-02-19 | 2014-07-09 | 扬州市金阳光电缆有限公司 | Water blocking water-tree-resistant medium-voltage power cable |
| CN205984371U (en) * | 2016-08-08 | 2017-02-22 | 中天科技海缆有限公司 | Waterproofing type aluminum alloy medium voltage power cable |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190125 |
|
| RJ01 | Rejection of invention patent application after publication |