CN103985446A - Lightning protection composite cable - Google Patents
Lightning protection composite cable Download PDFInfo
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- CN103985446A CN103985446A CN201410248977.5A CN201410248977A CN103985446A CN 103985446 A CN103985446 A CN 103985446A CN 201410248977 A CN201410248977 A CN 201410248977A CN 103985446 A CN103985446 A CN 103985446A
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Abstract
本发明属于线缆技术领域，防雷击综合电缆，包含缆芯、内护套、铠装层、外护套、接地层；缆芯外包覆第一保护层、内护套挤塑包覆在第一保护层外，内护套外包覆第二保护层，接地层位于第二保护层外，铠装层在接地层外，外护套挤塑包覆在铠装层之外；第一/二保护层都为云母带；其特征在于所述缆芯由多个电单元、中央隔离元件、多个周围隔离元件构成的，电单元由导体及绝缘层构成；电单元分布在中央隔离元件周围且相邻的电单元不相切；周围隔离元件与相邻的电单元及第一保护层都相切的，电单元与第一保护层相切或有间隙。本发明具以下主要有益效果：制作简单、生产速度快，接地层电阻率更低、维护成本更低、过载及雷击情况下能正常传输电力。
The invention belongs to the technical field of cables. The integrated lightning protection cable comprises a cable core, an inner sheath, an armor layer, an outer sheath, and a grounding layer; Outside the first protective layer, the inner sheath covers the second protective layer, the grounding layer is located outside the second protective layer, the armored layer is outside the grounded layer, and the outer sheath is extruded and coated outside the armored layer; Both the first and second protective layers are mica tapes; it is characterized in that the cable core is composed of multiple electrical units, central isolation elements, and multiple surrounding isolation elements. The electrical units are composed of conductors and insulating layers; the electrical units are distributed in the central isolation The adjacent electrical units around the element are not tangent; the surrounding isolation element is tangent to both the adjacent electrical units and the first protective layer, and the electrical unit is tangent to the first protective layer or has a gap. The invention has the following main beneficial effects: simple manufacture, fast production speed, lower grounding layer resistivity, lower maintenance cost, and normal power transmission under overload and lightning strike conditions.
Description
Technical field
The invention belongs to technical field of cables, especially relate to anti-lightning strike composite cable.
Background technology
Over nearly 20 years, China's information industry, with average annual 25% speed increase, is led over the development of other industries, has become the first pillar industry in industry.Estimate that information industry will be turned over again in coming 10 years.In communication industry product, there is the extraordinary lightning-proof optical cable product of communication that security performance is higher and will have good market prospects.Along with the 3G network communication network development, also the lightning protection measures of communication base station room will be considered, avoid catching fire because thunder and lightning causes communication base station and electric power interruption, machine room, to bring large-area communication disruption, equipment the major accident such as is burnt by thunderbolt, just need on the electric power between communication base station and steel tower, signal transmission product, consider safer product.Along with the develop rapidly of 3G business, the construction scale of communication base station expands gradually, and 3G communication network technology is built, and at least the whole nation needs the base station of 300,000 3G communication networks, if it is the cable of 100 meters of left and right that each base station needs length, this will be a larger market.
Carry out effective research and obtained good achievement for the lightning protection of cable both at home and abroad.Domesticly aspect lightning protected cable, also do a large amount of research and development, as: name is called: self-supporting lightning-proof power cable, the patent No. are: 200920150584.5; Name is called: lightning-proof power cable, the patent No. are: 200920150583.0; Name is called: lightning-proof optical cable, the patent No. are: 200920150582.6; Name is called: have the lightning-proof power cable of reinforced layer, the patent No. to be: 200910140719.4; Denomination of invention is: multigroup lightning protection optical cable, the patent No. are: 200910140717.5; Denomination of invention is: self-supporting lightning-proof optical cable, the patent No. are: the patents such as 200910140715.6; But they also have the following disadvantages: (1) ground plane adopts the tiltedly mode of bag, and speed of production is slower; (2) armour has only played the effect of armouring, and is standing after thunderbolt (3), and the partial earthing layer in cable blows, and sheath is melted in cable core interval insulated wire cores is combined together, makes insulated wire cores be difficult to separate; Can only make waste disposal; Above-mentioned deficiency has strengthened the maintenance cost after cable thunderbolt.
According in this, domestic applications people has applied for that name is called: anti-lightning strike composite cable, the patent No. are: 201320382810.9 utility model patent, although it has obtained the more satisfactory effect of lightning protection,, applicant thinks that it also exists following major defect: within electric unit is positioned at inner sheath, electric unit is in the time of serious overload or when conductor is hit by thunder and lightning, conductor temp .-elevating situation is serious, causes insulating barrier softening, even drippage, conductor in adjacent electric unit is collided, and causes secondary disaster; Therefore, the applicant has done further improvement for these innovation and creation.
Summary of the invention
In order to address the above problem, the object of the invention is to disclose a kind of anti-lightning strike composite cable, it is realized by the following technical solutions.
Anti-lightning strike composite cable, includes cable core, inner sheath, armour, oversheath, ground plane; Cable core is coated with the first protective layer, inner sheath extrusion molding is coated on outside the first protective layer, and inner sheath is coated with the second protective layer, and ground plane is positioned at outside the second protective layer, and armour is coated on outside ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer are all mica tape; It is characterized in that described cable core is made up of multiple electric units, central isolated component, multiple isolated component around, electric unit is made up of conductor and the insulating barrier that envelopes conductor; Multiple electric units are distributed in central isolated component around symmetrically and the insulating barrier of adjacent electric unit is nontangential; Around isolated component be arranged in gap that adjacent electric unit, the first protective layer form and around isolated component and adjacent electric unit and the first protective layer be all tangent, electric unit and the first protective layer are tangent or slightly gapped; Described mica tape is complied with layer by refractory layer, the first tack coat, mica paper layer, the second tack coat, laminated polyester film, the material of described refractory layer is polytetrafluoroethylene, described the first tack coat and the second tack coat by weight, include following raw material: 70～80 parts of epoxy resin, 30～50 parts of polyethylene resins, 20～40 parts of acid polyethylene vinyl acetate, 5～10 parts of glycerine, 16～35 parts of tetrachloromethanes; The laminated polyester film of the first protective layer is to contact with the inwall of inner sheath, and the laminated polyester film of the second protective layer is to contact with the outer wall of inner sheath.
Anti-lightning strike composite cable described above, it is characterized in that described central isolated component and around isolated component be all not conductive exotic material, and softening in the time of 300 DEG C.
Anti-lightning strike composite cable described above, it is characterized in that described central isolated component and around the material of isolated component be all pottery or polytetrafluoroethylene; Also material that can central isolated component is pottery, and around the material of isolated component is polytetrafluoroethylene; Material that can also central isolated component is polytetrafluoroethylene, and around the material of isolated component is pottery.
Anti-lightning strike composite cable described above, is characterized in that described ground plane is made up of many copper bars or aluminium bar.
Anti-lightning strike composite cable described above, is characterized in that described ground plane is that the direction that favours the direction of cable core axis or be parallel to cable core axis is coated on outside the second protective layer.
Anti-lightning strike composite cable described above, while it is characterized in that described ground plane is coated on outside the second protective layer to favour the direction of cable core axis, coated pitch is 15-30 times of the second protective layer diameter.
Anti-lightning strike composite cable described above, it is characterized in that described electric unit, central isolated component and around isolated component be parallel mode be distributed in cable core or electric unit and around isolated component be distributed in cable core as stranded around central isolated component in the stranded mode of one direction spiral.
Anti-lightning strike composite cable described above, it is characterized in that described the first protective layer be longitudinally or the mode of spiral be coated on outside cable core; While being longitudinally coated, the overlapping width of overlap joint is 2-4mm; When helical coated, overlap joint Duplication is 15%-30%.
Anti-lightning strike composite cable described above, the material that it is characterized in that described insulating barrier is polyvinyl chloride or high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Anti-lightning strike composite cable described above, the material that it is characterized in that described oversheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Anti-lightning strike composite cable described above, the material that it is characterized in that described inner sheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Anti-lightning strike composite cable described above, it is characterized in that described the first protective layer, the second protective layer are all synthetic mica tapes, and the thickness of mica tape is 0.1mm-2mm.
In the present invention, ground plane is metal, and the inner face of armour is non-coating layer with ground plane contact-making surface, therefore be also metal level, makes not only adjacent contact of ground plane, and armour carried out parallel connection, makes ground plane reach less resistance value; Standing thunderstorm hour, the caloric value in short-term of ground plane adds little, and the probability that therefore thunderbolt is blown reduces greatly; In addition, steel dress layer has also played armouring, against pressure, anti-effect of hitting; The existence of the first protective layer, the second protective layer, has isolated heat widely, and in thunderbolt situation, although may produce a large amount of heats, this heat, under the isolation of the first protective layer, the second protective layer, makes the work of the electric unit in cable core unaffected; In addition, thunderbolt high temperature can not enter cable core gap after inner sheath is melted, and therefore, after thunderbolt, when temperature declines, inner sheath still can solidify, and does not substantially affect cable performance, and it is quite convenient to safeguard; In the present invention, due to central isolated component, around isolated component has carried out effectively isolation by adjacent electric unit and position is fixed, even if make conductor use the overcurrent forming or be subject under the overcurrent condition of thunderbolt formation in overload, even the fusing of insulating barrier, also can not affect the transmission of electric power, as long as central isolated component, around the size of isolated component is suitable, the conductor in adjacent electric unit also can not contact, and can not produce secondary disaster.
Cable of the present invention when ground plane is parallel with cable core axis, can be produced together in oversheath extrusion process, does not need other stranded operation, and therefore, speed of production is faster, cost is lower.
Therefore, the present invention has following main beneficial effect: make simple, speed of production is fast, ground plane resistivity is lower, maintenance cost is lower, can normal transmission electric power in overload and thunderbolt situation.
Brief description of the drawings
Fig. 1 is the perspective view of the invention process example 1.
Fig. 2 is the cross-sectional structure schematic diagram that Fig. 1 amplifies.
Fig. 3 is the perspective view of the invention process example 2.
Fig. 4 is the cross-sectional structure schematic diagram that Fig. 3 amplifies.
Embodiment
embodiment 1
Ask for an interview Fig. 1 and Fig. 2, anti-lightning strike composite cable, includes cable core, inner sheath 4, armour 7, oversheath 8, ground plane 6; Cable core is coated with the first protective layer 3, inner sheath extrusion molding is coated on outside the first protective layer, and inner sheath is coated with the second protective layer 5, and ground plane is positioned at outside the second protective layer, and armour is coated on outside ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer are all mica tape; It is characterized in that described cable core by four electric units 1, central isolated component 22, four around isolated component 21 form, electric unit is made up of conductor 11 and the insulating barrier 12 that envelopes conductor; Four electric units are distributed in around central isolated component symmetrically and the insulating barrier of adjacent electric unit is nontangential; Around isolated component be arranged in gap that adjacent electric unit, the first protective layer form and around isolated component and adjacent electric unit and the first protective layer be all tangent, electric unit and the first protective layer are slightly gapped; Described mica tape is complied with layer by refractory layer, the first tack coat, mica paper layer, the second tack coat, laminated polyester film, the material of described refractory layer is polytetrafluoroethylene, described the first tack coat and the second tack coat by weight, include following raw material: 70～80 parts of epoxy resin, 30～50 parts of polyethylene resins, 20～40 parts of acid polyethylene vinyl acetate, 5～10 parts of glycerine, 16～35 parts of tetrachloromethanes; The laminated polyester film of the first protective layer is to contact with the inwall of inner sheath, and the laminated polyester film of the second protective layer is to contact with the outer wall of inner sheath.
embodiment 2
Ask for an interview Fig. 3 and Fig. 4, and with reference to figure 1 and Fig. 2, anti-lightning strike composite cable, includes cable core, inner sheath 4, armour 7, oversheath 8, ground plane 6; Cable core is coated with the first protective layer 3, inner sheath extrusion molding is coated on outside the first protective layer, and inner sheath is coated with the second protective layer 5, and ground plane is positioned at outside the second protective layer, and armour is coated on outside ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer are all mica tape; It is characterized in that described cable core by three electric units 1, central isolated component 22, three around isolated component 21 form, electric unit is made up of conductor 11 and the insulating barrier 12 that envelopes conductor; Four electric units are distributed in around central isolated component symmetrically and the insulating barrier of adjacent electric unit is nontangential; Around isolated component be arranged in gap that adjacent electric unit, the first protective layer form and around isolated component and adjacent electric unit and the first protective layer be all tangent, electric unit and the first protective layer are tangent; Described mica tape is complied with layer by refractory layer, the first tack coat, mica paper layer, the second tack coat, laminated polyester film, the material of described refractory layer is polytetrafluoroethylene, described the first tack coat and the second tack coat by weight, include following raw material: 70～80 parts of epoxy resin, 30～50 parts of polyethylene resins, 20～40 parts of acid polyethylene vinyl acetate, 5～10 parts of glycerine, 16～35 parts of tetrachloromethanes; The laminated polyester film of the first protective layer is to contact with the inwall of inner sheath, and the laminated polyester film of the second protective layer is to contact with the outer wall of inner sheath.
Mica tape described in the present invention is complied with layer by refractory layer, the first tack coat, mica paper layer, the second tack coat, laminated polyester film, the material of described refractory layer is polytetrafluoroethylene, described the first tack coat and the second tack coat by weight, include following raw material: 25 parts of 75 parts of epoxy resin, 40 parts of polyethylene resins, 30 parts of acid polyethylene vinyl acetate, 8 parts of glycerine, tetrachloromethane are optimum formulas.Mica tape in the present invention has good moisture resistance, has that hot strength is high, coefficient of elasticity is high, compression strength is large, fire resistance is high, evenness is good and be difficult for the advantages such as layering, resistance to acids and bases, anti-high corona; And refractory layer makes cable of the present invention more heat-resisting.
Certainly, anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, is characterized in that described electric unit can be that other are multiple, and described isolated component around also can be that other are multiple, in same cable, the quantity of electric unit is the same with the quantity of isolated component around.
Certainly, anti-lightning strike composite cable described above, is characterized in that described electric unit and the first protective layer can be tangent or slightly gapped.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, it is characterized in that described central isolated component and around isolated component be all not conductive exotic material, and softening in the time of 300 DEG C.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, it is characterized in that described central isolated component and around the material of isolated component be all pottery or polytetrafluoroethylene.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, is characterized in that described ground plane is made up of many copper bars or aluminium bar.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, is characterized in that described ground plane is that the direction that favours the direction of cable core axis or be parallel to cable core axis is coated on outside the second protective layer.
Anti-lightning strike composite cable described above, while it is characterized in that described ground plane is coated on outside the second protective layer to favour the direction of cable core axis, coated pitch is 15-30 times of the second protective layer diameter.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, it is characterized in that described electric unit, central isolated component and around isolated component be parallel mode be distributed in cable core or electric unit and around isolated component be distributed in cable core as stranded around central isolated component in the stranded mode of one direction spiral.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, it is characterized in that described the first protective layer be longitudinally or the mode of spiral be coated on outside cable core; While being longitudinally coated, the overlapping width of overlap joint is 2-4mm; When helical coated, overlap joint Duplication is 15%-30%.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, the material that it is characterized in that described insulating barrier is polyvinyl chloride or high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, the material that it is characterized in that described oversheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, the material that it is characterized in that described inner sheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Anti-lightning strike composite cable described in above-mentioned arbitrary embodiment, it is characterized in that described the first protective layer, the second protective layer are all synthetic mica tapes, and the thickness of mica tape is 0.1mm-2mm.
In the present invention, ground plane is metal, and the inner face of armour is non-coating layer with ground plane contact-making surface, therefore be also metal level, makes not only adjacent contact of ground plane, and armour carried out parallel connection, makes ground plane reach less resistance value; Standing thunderstorm hour, the caloric value in short-term of ground plane adds little, and the probability that therefore thunderbolt is blown reduces greatly; In addition, steel dress layer has also played armouring, against pressure, anti-effect of hitting; The existence of the first protective layer, the second protective layer, has isolated heat widely, and in thunderbolt situation, although may produce a large amount of heats, this heat, under the isolation of the first protective layer, the second protective layer, makes the work of the electric unit in cable core unaffected; In addition, thunderbolt high temperature can not enter cable core gap after inner sheath is melted, and therefore, after thunderbolt, when temperature declines, inner sheath still can solidify, and does not substantially affect cable performance, and it is quite convenient to safeguard; In the present invention, due to central isolated component, around isolated component has carried out effectively isolation by adjacent electric unit and position is fixed, even if make conductor use the overcurrent forming or be subject under the overcurrent condition of thunderbolt formation in overload, even the fusing of insulating barrier, also can not affect the transmission of electric power, as long as central isolated component, around the size of isolated component is suitable, the conductor in adjacent electric unit also can not contact, and can not produce secondary disaster.
Cable of the present invention when ground plane is parallel with cable core axis, can be produced together in oversheath extrusion process, does not need other stranded operation, and therefore, speed of production is faster, cost is lower.
Therefore, the present invention has following main beneficial effect: make simple, speed of production is fast, ground plane resistivity is lower, maintenance cost is lower, can normal transmission electric power in overload and thunderbolt situation.
The present invention is not limited to above-mentioned preferred forms, should be appreciated that design of the present invention can be by other various forms enforcement utilizations, and they drop in protection scope of the present invention equally.
Claims (10)
1. anti-lightning strike composite cable, includes cable core, inner sheath, armour, oversheath, ground plane; Cable core is coated with the first protective layer, inner sheath extrusion molding is coated on outside the first protective layer, and inner sheath is coated with the second protective layer, and ground plane is positioned at outside the second protective layer, and armour is coated on outside ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer are all mica tape; It is characterized in that described cable core is made up of multiple electric units, central isolated component, multiple isolated component around, electric unit is made up of conductor and the insulating barrier that envelopes conductor; Multiple electric units are distributed in central isolated component around symmetrically and the insulating barrier of adjacent electric unit is nontangential; Around isolated component be arranged in gap that adjacent electric unit, the first protective layer form and around isolated component and adjacent electric unit and the first protective layer be all tangent, electric unit and the first protective layer are tangent or gapped; Described mica tape is complied with layer by refractory layer, the first tack coat, mica paper layer, the second tack coat, laminated polyester film, the material of described refractory layer is polytetrafluoroethylene, described the first tack coat and the second tack coat by weight, include following raw material: 70～80 parts of epoxy resin, 30～50 parts of polyethylene resins, 20～40 parts of acid polyethylene vinyl acetate, 5～10 parts of glycerine, 16～35 parts of tetrachloromethanes; The laminated polyester film of the first protective layer is to contact with the inwall of inner sheath, and the laminated polyester film of the second protective layer is to contact with the outer wall of inner sheath.
2. anti-lightning strike composite cable according to claim 1, it is characterized in that described central isolated component and around the material of isolated component be all pottery or polytetrafluoroethylene; Also material that can central isolated component is pottery, and around the material of isolated component is polytetrafluoroethylene; Material that can also central isolated component is polytetrafluoroethylene, and around the material of isolated component is pottery.
3. anti-lightning strike composite cable according to claim 2, is characterized in that described ground plane is made up of many copper bars or aluminium bar.
4. anti-lightning strike composite cable according to claim 3, is characterized in that described ground plane is that the direction that favours the direction of cable core axis or be parallel to cable core axis is coated on outside the second protective layer.
5. anti-lightning strike composite cable according to claim 4, while it is characterized in that described ground plane is coated on outside the second protective layer to favour the direction of cable core axis, coated pitch is 15-30 times of the second protective layer diameter.
6. according to claim 1 or claim 2 or claim 3 or claim 4 or anti-lightning strike composite cable claimed in claim 5, it is characterized in that described electric unit, central isolated component and around isolated component be parallel mode be distributed in cable core or electric unit and around isolated component be distributed in cable core as stranded around central isolated component in the stranded mode of one direction spiral.
7. anti-lightning strike composite cable according to claim 6, it is characterized in that described the first protective layer be longitudinally or the mode of spiral be coated on outside cable core; While being longitudinally coated, the overlapping width of overlap joint is 2-4mm; When helical coated, overlap joint Duplication is 15%-30%.
8. anti-lightning strike composite cable according to claim 7, the material that it is characterized in that described insulating barrier is polyvinyl chloride or high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
9. anti-lightning strike composite cable according to claim 8, the material that it is characterized in that described oversheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene; The material of described inner sheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
10. anti-lightning strike composite cable according to claim 9, it is characterized in that described the first protective layer, the second protective layer are all synthetic mica tapes, and the thickness of mica tape is 0.1mm-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248977.5A CN103985446B (en) | 2014-06-07 | 2014-06-07 | Anti-lightning strike composite cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248977.5A CN103985446B (en) | 2014-06-07 | 2014-06-07 | Anti-lightning strike composite cable |
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| Publication Number | Publication Date |
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| CN103985446A true CN103985446A (en) | 2014-08-13 |
| CN103985446B CN103985446B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410248977.5A Expired - Fee Related CN103985446B (en) | 2014-06-07 | 2014-06-07 | Anti-lightning strike composite cable |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2059316C1 (en) * | 1994-02-16 | 1996-04-27 | Московский технический университет связи и информатики | Optical-fiber ground wire |
| CN201489859U (en) * | 2009-06-11 | 2010-05-26 | 安徽华能电缆集团有限公司 | Halogen-free flame retardant control cable |
| CN203338868U (en) * | 2013-07-01 | 2013-12-11 | 中利科技集团股份有限公司 | Lightning protection cables for communication base stations |
| CN103489545A (en) * | 2013-09-27 | 2014-01-01 | 昆山市奋发绝缘材料有限公司 | Insulating material for cable |
| CN203535974U (en) * | 2013-10-23 | 2014-04-09 | 无锡市伟飞电缆材料有限公司 | Mica tape |
-
2014
- 2014-06-07 CN CN201410248977.5A patent/CN103985446B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2059316C1 (en) * | 1994-02-16 | 1996-04-27 | Московский технический университет связи и информатики | Optical-fiber ground wire |
| CN201489859U (en) * | 2009-06-11 | 2010-05-26 | 安徽华能电缆集团有限公司 | Halogen-free flame retardant control cable |
| CN203338868U (en) * | 2013-07-01 | 2013-12-11 | 中利科技集团股份有限公司 | Lightning protection cables for communication base stations |
| CN103489545A (en) * | 2013-09-27 | 2014-01-01 | 昆山市奋发绝缘材料有限公司 | Insulating material for cable |
| CN203535974U (en) * | 2013-10-23 | 2014-04-09 | 无锡市伟飞电缆材料有限公司 | Mica tape |
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| Publication number | Publication date |
|---|---|
| CN103985446B (en) | 2016-09-07 |
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