CN108806846A - A kind of water preventing ability mineral insulated cable - Google Patents
A kind of water preventing ability mineral insulated cable Download PDFInfo
- Publication number
- CN108806846A CN108806846A CN201710994293.3A CN201710994293A CN108806846A CN 108806846 A CN108806846 A CN 108806846A CN 201710994293 A CN201710994293 A CN 201710994293A CN 108806846 A CN108806846 A CN 108806846A
- Authority
- CN
- China
- Prior art keywords
- insulating layer
- oversheath
- preventing ability
- water preventing
- paint
- 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
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- 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
-
- 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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- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
The invention discloses a kind of water preventing ability mineral insulated cables, include interior copper conductor, insulated paint, the first insulating layer, protective metal shell, second insulating layer, oversheath successively from inside to outside, insulated paint is phenolic resin coating, epoxy resin coating or polyester-imide paint, first insulating layer is magnesia, aluminium oxide or silica, second insulating layer is montmorillonite, protective metal shell is seamless copper sheath or aluminum alloy sheath, and oversheath is polyvinyl chloride oversheath or the smokeless oversheath of low halogen.The present invention is on the basis of using magnesia as the first insulating layer, using montmorillonite as second insulating layer, due to the laminated structure of montmorillonite, barrier property is good, it can effectively stop cable and the moisture in air, the insulation performance for improving cable coats the class of insulation and security performance that insulated paint further increases cable outside interior copper conductor.
Description
Technical field
The invention belongs to special cable fields, are a kind of water preventing ability mineral insulated cables specifically.
Background technology
How in the case where happening suddenly fire, make various fire-fighting equipment normal power supplies, quick extinguishing, and within a certain period of time
Ensure unobstructed, the loss of injures and deaths and lives and properties that tries to gain time precious to one to greatest extent, reduce personnel of electric power and communication,
It is the project that people constantly explore.Ensure that power and distribution supply cable keeps power supply extremely important in fire environment.Common cable is being sent out
After calamity of lighting a fire, it cannot be guaranteed that circuit normal power supply, causes elevator, emergency lighting, automatic alarm and disaster relief system etc. normal
Work, rescue evacuation and its difficulty.
Copper core copper sheath magnesium oxide insulating cable is referred to as mineral cable, which is using high conductivity copper conductor as leading
Wire core and seamless copper pipe protective layer, conductor and protection interlayer are to fill very closely knit magnesia to insulate, and belong to new
Type cable.The material that mineral cable uses is copper or magnesia powder, these are all inorganic material, therefore cable itself will not
It burns and not fire-retardant.Such usual cable can also effectively be run close to cable when flame, for a long time utilization in rapid succession
Temperature can reach 250 DEG C.Cable can also be close to powering within the short time under copper melting temperature when emergency.Cable
Copper sheath belongs to good earth lead, such cable need not set earth lead again, only needs copper sheath and apparatus
Earthed system connects, in order to constitute preferable earth-return circuit.Mineral insulated cable production technology mainly has pre- oxygenerating
Three kinds of magnesium porcelain knob method, magnesia powder automatic filling method and continuous argon welding method, are wherein directed to drawing in first two technique
Link is stretched, however inner wire and lapped insulation occur not with mineral insulation and oversheath synchro-draw in practical drawing process
Relative displacement conductor insulation interface can be caused to rub, influence the stress levels of cable.
Cable, due to the erosion of moisture and moisture, causes transmission performance to decline during long-term use, influences normal
Use.It is rainy through moisture, level of ground water is high, the insulating properties and water preventing ability of buried-pipe laying cable especially in southern area
Seem increasingly important.The insulating layer of magnesia composition is easily chemically reacted with the moisture in air, generates hydrogen that can be conductive
Magnesia.In end work progress, cable socket peel off bare exposed conductor, the insulation resistance of general cable more than 10M Ω,
If not having to complete the making of end in 1 hour, insulation resistance can drop to 10M Ω hereinafter, even dropping to 0.5M Ω
Below.If scratching outer layer, and not finding and make sealed damp-proof processing in time, insulation values can rapidly decline and gradually near 0,
And then cause cable that can not use.
Montmorillonite is a kind of typical phyllosilicate non pinetallic nano mineral, since it has dispersibility, dilatancy, suction
Aqueous and lower-price characteristic and be widely used, in addition to this also there is inorganic rigid, thermal stability, dimensional stability etc.
Feature.Since there is the disc structure to differ in size, small molecule can not possibly only pass through directly through sheet surfaces for montmorillonite
Changing path to come step by step deeply, path is elongated to moving it, the time lengthening needed for permeable material, and total transit dose is reduced,
Barrier property is good.
Invention content
For problems of the prior art and deficiency, the purpose of the present invention is to provide a kind of water preventing ability mineral insulations
Cable.
Following technical scheme may be used to realize in technical problem solved by the invention：
A kind of water preventing ability mineral insulated cable, from inside to outside successively include interior copper conductor, the first insulating layer, protective metal shell,
Second insulating layer, oversheath, the first insulating layer are magnesia, aluminium oxide or silica, and second insulating layer is montmorillonite, interior copper
Conductive surface is coated with insulated paint.
To better implement the present invention, preferably, the insulated paint thickness is 0.05~0.1mm.
To better implement the present invention, preferably, the insulated paint is phenolic resin coating, epoxy resin coating or polyester
Imines paint.
To better implement the present invention, preferably, first insulating layer is magnesia.
To better implement the present invention, preferably, the protective metal shell is seamless copper sheath.
To better implement the present invention, preferably, the protective metal shell be aluminum alloy sheath, thickness be 0.5~
1.5mm.Aluminum alloy sheath has stronger corrosion resistance, can improve the service life and environment friendly and pollution-free of the present invention.
To better implement the present invention, preferably, there is mica wrapping layer and/or fire-retardant thin outside the insulated paint
Film, insulation performance is more preferable, proof voltage grade higher.
To better implement the present invention, preferably, the oversheath is that polyvinyl chloride oversheath or low halogen are smokelessly outer
Sheath.
To better implement the present invention, preferably, the quantity of the interior copper conductor is at least two.
A kind of technique preparing water preventing ability mineral insulated cable disclosed by the invention is：Copper conductor is to required section in drawing
Face coats insulated paint after surface clean, then the interior copper conductor for being coated with insulated paint is penetrated the protective metal shell for having cleaned completion and
Oversheath fills magnesia powder between interior copper conductor and protective metal shell, and montmorillonite is filled between protective metal shell and oversheath,
Cable embryo is formed, then the cable embryo of composition is synchronized into stretching, draws repeatedly and is repeatedly annealed to required cross-sectional area of conductor.
Compared with prior art, the present invention haing the following advantages and advantageous effect：
(1) present invention is coated with insulated paint in interior copper conductor surface, it is ensured that the insulating properties of conductor, and also insulated paint has
Certain stretching elongation can be such that the interior copper conductor coated with insulated paint is deformed with mineral synchro-draw, and solving causes to aoxidize
The low defect of magnesium insulation performance improves the class of insulation and security performance of cable with this.
(2) present invention is using montmorillonite as second insulating layer, since montmorillonite is phyllosilicate non pinetallic nano mineral,
Small molecule only can not possibly step by step be goed deep by changing path directly through sheet surfaces, elongated to move it path,
Time lengthening needed for permeable material, total transit dose are reduced, and barrier property is good, to which montmorillonite can be with as second insulating layer
Effectively blocking cable and the moisture in air.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram that the present invention has more interior copper conductors.
Wherein：Copper conductor in 1-；The first insulating layers of 2-；3- protective metal shells；4- second insulating layers；5- oversheaths；6- insulate
Paint.
Specific implementation mode
The present invention will be further described below with reference to the drawings：
All embodiments of the invention are prepared by the following method：As shown in Figure 1, copper leads 1 body to required section, table in drawing
Insulated paint 6 is coated after the cleaning of face, then the interior copper conductor 1 for being coated with insulated paint 6 is penetrated to the protective metal shell 3 for having cleaned completion and outer
Sheath 5 fills magnesia powder between interior copper conductor 1 and protective metal shell 3, and filling, which is covered, between protective metal shell 3 and oversheath 5 takes off
Soil forms cable embryo, then the cable embryo of composition is synchronized stretching, draws repeatedly and is repeatedly annealed to required cross-sectional area of conductor.
Embodiment 1：
A kind of water preventing ability mineral insulated cable of the present embodiment, as shown in Figure 1, from inside to outside successively include interior copper conductor 1,
Insulated paint 6, the first insulating layer 2, protective metal shell 3, second insulating layer 4, oversheath 5, wherein the first insulating layer 2 is aluminium oxide, the
Two insulating layers 4 are montmorillonite, and insulated paint 6 is phenolic resin coating.
Select metallic copper as conductor be because it performance and price cost performance in all metals highest, metallic copper
As conductor and most common.For mineral insulated cable, independent earth lead is unwanted, because of cable thus
In protective metal shell played the role of earth lead, it is possible to provide fabulous low ground resistance.With regard to the wiring of ground connection sheath circuit
Speech, in mostly ground connection neutralized system, outer layer metal sheath can be used as ground connection and neutral conductor.
Insulated paint 6 is coated on 1 surface of interior copper conductor, it is ensured that the insulating properties of conductor, and also insulated paint has certain drawing
Elongation is stretched, the interior copper conductor 1 coated with insulated paint 6 can be made to be deformed with mineral synchro-draw, solving leads to magnesium oxide insulated
The low defect of performance improves the class of insulation and security performance of cable with this.
Embodiment 2：
A kind of water preventing ability mineral insulated cable of the present embodiment includes interior copper conductor 1, insulated paint 6, the successively from inside to outside
One insulating layer 2, protective metal shell 3, second insulating layer 4, oversheath 5, wherein insulated paint 6 are epoxy resin coating, and the first insulating layer 2 is
Silica, second insulating layer 4 are montmorillonite, and oversheath 5 is polyvinyl chloride oversheath.
Embodiment 3：
A kind of water preventing ability mineral insulated cable of the present embodiment includes interior copper conductor 1, insulated paint 6, the successively from inside to outside
One insulating layer 2, protective metal shell 3 are seamless copper sheath sheath, second insulating layer 4, oversheath 5, and wherein insulated paint 6 is polyester-imide
Paint, the first insulating layer 2 are magnesia, and second insulating layer 4 is montmorillonite, and oversheath 5 is the smokeless oversheath of low halogen.
Embodiment 4：
A kind of water preventing ability mineral insulated cable of the present embodiment includes interior copper conductor 1, insulated paint 6, the successively from inside to outside
One insulating layer 2, protective metal shell, second insulating layer 4, oversheath 5, the first insulating layer 2 are magnesia, and second insulating layer 4 is to cover to take off
Soil, aluminum alloy sheath thickness are 0.5~1.5mm, and protective metal shell 3 is aluminum alloy sheath.
Aluminum alloy sheath has stronger corrosion resistance, can improve the service life and environment friendly and pollution-free of the present invention.
Embodiment 5：
A kind of water preventing ability mineral insulated cable of the present embodiment includes interior copper conductor 1, insulated paint 6, the successively from inside to outside
One insulating layer 2, protective metal shell 3, second insulating layer 4, oversheath 5, the first insulating layer are magnesia, and second insulating layer is to cover to take off
Soil, the insulated paint 6 also have mica wrapping layer and/or fire-retardant film outside.
Mica wrapping layer and/or fire-retardant film is used to make mineral insulated cable insulation performance more preferable, proof voltage grade is more
It is high.
Embodiment 6：
A kind of water preventing ability mineral insulated cable of the present embodiment, as shown in Fig. 2, from inside to outside successively include interior copper conductor 1,
Insulated paint 6, the first insulating layer 2, protective metal shell 3 are seamless copper sheath sheath, second insulating layer 4,5 low halogen of oversheath smokelessly outer shield
Set, the first insulating layer 2 are magnesia, and second insulating layer 4 is montmorillonite, also has mica wrapping layer and/or resistance outside the insulated paint 6
Film is fired, the quantity of the interior copper conductor 1 is at least two.
Test example：
Main experimental method is dominated as BS 6387-2013 both at home and abroad at present, and wherein fire resisting water spray test is：Cable needs
After meeting direct at a temperature of 650 DEG C for fire, while water spray 15min does not puncture.The present invention is carried out according to the method described above resistance to
Fire-fighting water test, all embodiments do not puncture, and circuit keeps complete and normal use, illustrate that montmorillonite is added in the cable to be made
For second insulating layer, erosion of the moisture to cable can be effectively obstructed, improves the service life and comprehensive performance of cable.
Finally illustrate, have been shown and described above the present invention basic principles and main features and the present invention it is excellent
Point.It will be understood by a person skilled in the art that the present invention is not limited to the above embodiments, described in above embodiments and description
Only the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention, which also has, various change and to be changed
Into these changes and improvements all fall within the protetion scope of the claimed invention.
Claims (10)
1. a kind of water preventing ability mineral insulated cable includes interior copper conductor (1), the first insulating layer (2), metal shield successively from inside to outside
Cover (3), second insulating layer (4), oversheath (5), it is characterised in that：First insulating layer (2) is magnesia, aluminium oxide or titanium dioxide
Silicon, second insulating layer (4) are montmorillonite, and interior copper conductor (1) surface is coated with insulated paint (6).
2. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：Insulated paint (6) thickness
For 0.05~0.1mm.
3. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：The insulated paint (6) is phenol
Urea formaldehyde paint, epoxy resin coating or polyester-imide paint.
4. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：First insulating layer (2)
Preferably magnesia.
5. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：The protective metal shell (3) is
Seamless copper sheath.
6. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：The protective metal shell (3) is
Aluminum alloy sheath, thickness are 0.5~1.5mm.
7. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：The insulated paint (6) is gone back outside
There are mica wrapping layer and/or fire-retardant film.
8. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：The oversheath (5) is poly-
Vinyl chloride oversheath or the smokeless oversheath of low halogen.
9. a kind of water preventing ability mineral insulated cable according to claim 1, it is characterised in that：The interior copper conductor (1)
Quantity is at least two.
10. a kind of preparing a kind of technique of water preventing ability mineral insulated cable as described in claim 1, it is characterised in that：It draws
Interior copper conductor (1) is to required section, and coating insulated paint (6), then will be coated with the interior copper conductor of insulated paint (6) after surface clean
(1) protective metal shell (3) and oversheath (5) for having cleaned completion are penetrated, is filled between interior copper conductor (1) and protective metal shell (3)
Magnesia powder fills montmorillonite between protective metal shell (3) and oversheath (5), forms cable embryo, then the cable embryo of composition is carried out together
Step stretches, and draws repeatedly and is repeatedly annealed to required cross-sectional area of conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710994293.3A CN108806846A (en) | 2017-10-23 | 2017-10-23 | A kind of water preventing ability mineral insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710994293.3A CN108806846A (en) | 2017-10-23 | 2017-10-23 | A kind of water preventing ability mineral insulated cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108806846A true CN108806846A (en) | 2018-11-13 |
Family
ID=64095092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710994293.3A Pending CN108806846A (en) | 2017-10-23 | 2017-10-23 | A kind of water preventing ability mineral insulated cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108806846A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188109A (en) * | 2021-12-07 | 2022-03-15 | 辽宁嘉顺科技有限公司 | Preparation method and application of magnesium oxide for high-impedance and high-voltage breakdown prevention mineral insulated cable |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2809814Y (en) * | 2005-06-26 | 2006-08-23 | 江苏新远程电缆有限公司 | Mineral insulated cable |
| CN102543273A (en) * | 2012-02-15 | 2012-07-04 | 安徽华星电缆集团有限公司 | Environment-friendly nano-composite high polymer control cable |
-
2017
- 2017-10-23 CN CN201710994293.3A patent/CN108806846A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2809814Y (en) * | 2005-06-26 | 2006-08-23 | 江苏新远程电缆有限公司 | Mineral insulated cable |
| CN102543273A (en) * | 2012-02-15 | 2012-07-04 | 安徽华星电缆集团有限公司 | Environment-friendly nano-composite high polymer control cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188109A (en) * | 2021-12-07 | 2022-03-15 | 辽宁嘉顺科技有限公司 | Preparation method and application of magnesium oxide for high-impedance and high-voltage breakdown prevention mineral insulated cable |
| CN114188109B (en) * | 2021-12-07 | 2024-05-10 | 辽宁嘉顺科技有限公司 | Preparation method and application of magnesium oxide for high-impedance high-voltage breakdown prevention mineral insulated cable |
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| 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: 20181113 |
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| RJ01 | Rejection of invention patent application after publication |