CN1134026C - Cable with termite-resistant protective armor - Google Patents
Cable with termite-resistant protective armor Download PDFInfo
- Publication number
- CN1134026C CN1134026C CNB961118385A CN96111838A CN1134026C CN 1134026 C CN1134026 C CN 1134026C CN B961118385 A CNB961118385 A CN B961118385A CN 96111838 A CN96111838 A CN 96111838A CN 1134026 C CN1134026 C CN 1134026C
- Authority
- CN
- China
- Prior art keywords
- cable
- armouring
- termite
- sheath
- core
- 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.)
- Expired - Fee Related
Links
- 241000256602 Isoptera Species 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000006229 carbon black Substances 0.000 claims abstract description 4
- -1 polyethylene Polymers 0.000 abstract description 11
- 239000004698 Polyethylene Substances 0.000 abstract description 10
- 229920000573 polyethylene Polymers 0.000 abstract description 10
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 9
- 230000007935 neutral effect Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Insulated Conductors (AREA)
- Catching Or Destruction (AREA)
Abstract
A cable for laying underground with or at risk of termites, the core of which is surrounded by a sheath, characterized in that the sheath has an outer sheath (7, 22) consisting essentially of polyethylene, the outer sheath having a density of at least 0.9g/cm3Wherein the outer layer (7, 22) comprises at least one material for stabilizing the outer layer against the action of light, said material comprising from 1 to 2% by weight of carbon black. Such cables can thus be laid underground to contain or prevent the risk of termites without the need for additional metal protective sheathing around the jacket.
Description
Technical field
The present invention relates to a kind of cable that has the protection armouring of termite-proof.
Background technology
Can damage in the animal pest be layed in underground cable and comprise termite, it is a kind ofly to survive in the torrid zone and a kind of insect of subtropical zone and south of europe some areas.In this connection, termite has been damaged the outer armouring that preferably is made of plastics and the wire insulation body of cable, and has therefore reduced the useful life of cable and the reliability of use.
Be layed in underground cable, particularly midium voltage cable and low-voltage cable (just voltage is lower than the cable of 1KV), and signal cable, for example various types of communication cables.
Need point out that below explanation only limits to midium voltage cable, but can make necessary modifications to it when the present invention is used for low-voltage cable and signal cable.
The voltage of midium voltage cable is 10 to 30KV.They have the heart yearn that comprises Ampereconductors and insulation armouring, this heart yearn by a sheath institute that has a neutral conductor around.In known midium voltage cable, sheath comprises semiconduction telescopic band, neutral conductor and the outer armouring of supporting insulation armouring, and outer armouring is made by polyethylene at least in part.
Midium voltage cable also can be in order to produce three-core cable.In the case, this three-core cable comprises three strands of stranded each other cables, and is fixed together by an armouring of being made by polyvinyl chloride or polyethylene at least in part.
In order to increase the service life and to improve the reliability of using, the known underground midium voltage cable that is laid on termite also has the protection armouring of a wound sheath, and it is reached by termite-proof the insensitive material of termite is made, for example the Metal Protection armouring.
In the embodiment that designs at above-mentioned concrete purposes, this midium voltage cable has following described shortcoming, and promptly because increased the protection armouring, the production of cable is very complicated and quite expensive.
In addition, the cable of metal protection armouring is housed, and the three-core cable of forming with these cables has sizable cross section, and heavier, consequently all belong to aspect storage, transportation and the laying unfavorable.Therefore, purpose for example in order to store and to transport, the cut cable of cable or three-core cable will be wrapped on the cylinder.At the diameter that cable need be monitored cylinder on cylinder the time, and it is the function of cable size, and available space and permissible maximum weight make the length of cut cable be subjected to disadvantageous restriction on the cylinder.
Summary of the invention
The object of the present invention is to provide a kind of cable that has the protection armouring of termite-proof, it is compared with the present known underground cable that is layed in termite, at least have same performance, useful life and dependability, produce but on producing, then can adopt simple more and have more cost-benefit mode.
Surprisingly, verified now, the cable that has at least in part the outer armouring of being made by polyethylene has intensity and the ability of opposing termite, and no matter when the averag density of its outer armouring all is at least 0.9g/cm
3, with the dependability that reaches height and the demand in long-term useful life.
Therefore, theme of the present invention is itself to be the known novel usage that has at least in part the cable of the outer armouring of being made by polyethylene, specifically comprise following technical characterictic: a kind of cable, be used to be laid on the underground of termite or place from the danger of termite is arranged, the heart yearn of this cable is centered on by a sheath, it is characterized in that this sheath has and mainly comprises poly outer armouring, this skin armouring density is at least 0.9g/cm
3, skin includes at least one and is used to make the anti-effect of light of outer armouring and stable material, and this material comprises being 1 to 2% carbon black by weight.
Description of drawings
Can be layed in the specific embodiment of the underground cable of termite below by means of description of drawings, among the figure:
Fig. 1 is that the axle of cable is surveyed view,
Fig. 2 is the cutaway view that the three-core cable of three strands of stranded each other cables is arranged by first,
Fig. 3 is the cutaway view that the three-core cable of three strands of stranded each other cables is arranged by second.
Embodiment
Figure 1 illustrates the cable and total the representing with label 1 that are used for pressure, this midium voltage cable has an Ampereconductors 3, and it comprises many stranded each other leads, and in the columniform insulation armouring 4 of packing into.Insulation armouring 4 reaches outer edge area within it a semi-conductive layer 4a and 4b respectively, and is covered by the telescopic band 5 of a semiconductive.Semiconductive telescopic band 5 by the neutral line 6 of a metal and an outer armouring 7 around.
The data of following diameter about different layers are typical, and the cross section that relates to a kind of its Ampereconductors is 95mm
2, assigned voltage is 10 to 30KV cable.Under the bigger situation in the cross section of Ampereconductors, the area in different cross sections can correspondingly increase, and can do necessary change with regard to the cross section of these other Ampereconductors.
Its diameter of heart yearn that comprises Ampereconductors 3 and insulation armouring 4 is about 24 to 29mm, and the wall thickness of insulation armouring itself is about 5 to 9mm.The thickness that centers on the semiconductive telescopic band 5 of insulation armouring 4 is about 0.4 to 0.6mm.Fully be about 0.2 to 0.4mm and for example comprise film or a woven wire of copper or aluminium around the wall thickness of the neutral line 6 of telescopic band 5.
At last, outer armouring 7 comprises the plastic coating made from polyethylene that one deck is very solid, and its thickness is about 0.5 to 2mm, and density is at least 0.9g/cm
3, 0.92g/cm at least for example
3, preferably be at least 0.93g/cm
3Outer armouring 7 mainly, and is preferably most of, even made by polyethylene fully, and it can also have concentration factor in addition, for example is 1 to 2% carbon black by weight, to reach the purpose of the anti-effect of light of stablizing outer armouring.
The three-core cable of integrally representing with label 10 among Fig. 2 has three strands of stranded each other cables 11.The building method of this cable and cable shown in Fig. 1 is the same basically, and per share have one by stranded copper cash and a plastic insulation, a telescopic band, a neutral conductor and the heart yearn that outer armouring forms.In addition, as packing material and comprise polypropylene and/or poly illusory core (daummy core) 12 and 13 extends along three strands of stranded each other cables 11.Three strands of stranded each other cables 11 and illusory core 12 and 13 are fixed together by the outer armouring that covers them.Described outer armouring comprises a bandage 14 and a protection armouring 15 that cable 11 is fixed together.The thickness of protection armouring is about 1 to 2mm, mainly comprises polyethylene, and its density is at least 0.93g/cm
3
Three-core cable 20 shown in Fig. 3 comprises three strands of stranded each other cables 21 equally, but with the difference of cable shown in Figure 2 be without any illusory core, therefore do not have circular cross sections.According to purposes of the present invention, this three-core cable 20 also is provided with an outer armouring 22, and it is mainly made by polyethylene, and its density is at least 0.93g/cm
3
Can point out now, midium voltage cable that describes by means of Fig. 1 and the three-core cable shown in Fig. 2 and Fig. 3 only are to be selected from a kind of among the possible embodiment of cable of a plurality of following types, and this cable can be layed in the underground of termite or have place from the danger of termite.
Therefore self-evident, other cable, for example low-voltage cable or communication cable are particularly worked as its outer armouring and are had the 0.9g/cm of being at least
3Density, and have a part at least, but when preferably all making by polyethylene, also can be layed in the underground of termite or place from the danger of termite is arranged.
Claims (1)
1. cable is used to be laid on the underground of termite or place from the danger of termite is arranged, and the heart yearn of this cable is centered on by a sheath, it is characterized in that, this sheath has and mainly comprises poly outer armouring (7,22), and this skin armouring density is at least 0.9g/cm
3, wherein, outer (7,22) include and at least aly are used to make the anti-effect of light of outer armouring and stable material, and described material comprises being 1 to 2% carbon black by weight.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH241695A CH690601A5 (en) | 1995-08-24 | 1995-08-24 | Electric cable which can be used in termite infested ground, comprises a core with a polyethylene mantle. |
| CH2416/95 | 1995-08-24 | ||
| CH2416/1995 | 1995-08-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1147678A CN1147678A (en) | 1997-04-16 |
| CN1134026C true CN1134026C (en) | 2004-01-07 |
Family
ID=4233302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB961118385A Expired - Fee Related CN1134026C (en) | 1995-08-24 | 1996-08-15 | Cable with termite-resistant protective armor |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1134026C (en) |
| CH (1) | CH690601A5 (en) |
| IN (1) | IN191928B (en) |
| MY (1) | MY130224A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244103A (en) * | 2015-10-30 | 2016-01-13 | 苏俊兰 | Environmental protection device |
-
1995
- 1995-08-24 CH CH241695A patent/CH690601A5/en not_active IP Right Cessation
- 1995-10-24 IN IN1942DE1995 patent/IN191928B/en unknown
-
1996
- 1996-08-15 CN CNB961118385A patent/CN1134026C/en not_active Expired - Fee Related
- 1996-08-20 MY MYPI9603406 patent/MY130224A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| MY130224A (en) | 2007-06-29 |
| CN1147678A (en) | 1997-04-16 |
| CH690601A5 (en) | 2000-10-31 |
| IN191928B (en) | 2004-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040107 Termination date: 20090915 |