CN102779579A - Shielding type digital symmetrical cable - Google Patents
Shielding type digital symmetrical cable Download PDFInfo
- Publication number
- CN102779579A CN102779579A CN2012102527674A CN201210252767A CN102779579A CN 102779579 A CN102779579 A CN 102779579A CN 2012102527674 A CN2012102527674 A CN 2012102527674A CN 201210252767 A CN201210252767 A CN 201210252767A CN 102779579 A CN102779579 A CN 102779579A
- Authority
- CN
- China
- Prior art keywords
- cable
- twisted pair
- crossing skeleton
- layer
- belting layer
- 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
Landscapes
- Communication Cables (AREA)
- Insulated Conductors (AREA)
Abstract
The invention provides a shielding type digital symmetrical cable which comprises a crossed framework, an inner belting layer, a shielding layer, an outer belting layer and an outer sheath from the center to the outside in sequence, wherein the crossed framework and the inner belting layer form four chambers; each chamber is internally provided with a twisted pair set; the twisted pair set is formed by twisting two insulating single cables; each insulating single cable comprises a cable core and an insulating layer; the insulating layer is wrapped outside the cable core; and the crossed framework is a polyethylene crossed framework. The shielding type digital symmetrical cable has the advantages of excellent flexibility and convenience in cabling construction. The crossed framework enhances the tensile performance and the extrusion resistant performance of a cable. The low-frequency disturbance of the cable is effectively offset by using the balance characteristic of the twisted pair set by setting a twisted pair pitch, so as to ensure excellent working condition of the cable in low-frequency disturbance; and the crosstalk can be controlled when the data frequency is high.
Description
Technical field
The present invention relates to a kind of cable, relate in particular to a kind of shield type numeral symmetrical cable.
Background technology
Digital communications network is constantly to multi-functional, big capacity, high-frequency and two-forty development; Shielding properties to the anti-electromagnetic interference of cable for digital communication is had higher requirement; The shielding properties of the screen of cable shield effectiveness when frequency is high more is obvious more, but how the interference when lower frequency solves the antijamming capability that also influences whole cable.Simultaneously, cable in use is prone to be stressed, and the structural change of cable is exerted an influence, and should guarantee that with this cable structure when receiving certain extruding force is still stable, thereby does not influence the normal use of cable.
Summary of the invention
The purpose of this invention is to provide a kind of shield type numeral symmetrical cable, to solve shielding properties shield effectiveness when frequency is high more of screen of cable obvious more, but how the interference when lower frequency solves the problem of the antijamming capability that also influences whole cable.
Technical solution of the present invention is:
A kind of shield type numeral symmetrical cable comprises the crossing skeleton that is outwards set gradually by the center, interior belting layer, screen, outer belting layer and oversheath, and said crossing skeleton and said interior belting layer form four chambers; Be equipped with the twisted pair wire group in each said chamber, said twisted pair wire group is that two the insulated single line is stranded forms, and said insulated single wire comprises core and insulating barrier; Said core is wrapped with insulating barrier, and said core is the annealed copper core, and said insulating barrier is solid polyethylene layer; Said crossing skeleton is the polyethylene crossing skeleton, and the external diameter of said crossing skeleton is 4.5mm-5.2mm, and the vane thickness of said crossing skeleton is 0.021mm-0.03mm; Belting layer is the polyester band in said; Said screen is the double-layer aluminum-foil screen, and said outer belting layer is the polyester band, and said oversheath is the polyolefin oversheath.
Further improve and be: the pair twist pitch of said twisted pair wire group is 16.4mm-17.8mm.
Further improve and be: the diameter of said copper core is 0.57mm-0.58mm.
Further improve and be: the thickness of said oversheath is 0.6-0.7mm.
Further improve and be: be filled with waterproofing rope in the said chamber.
A kind of shield type numeral of the present invention symmetrical cable; Adopt softer low density polyethylene (LDPE) crossing skeleton, make crossing skeleton can isolate twisted pair wire group and stable electrical cable structure, but crossing skeleton should not be too big; External diameter is 4.5mm-5.2mm, and vane thickness is 0.021mm-0.03mm.When stranding, cross the fixedly position of twisted pair wire group and crossing skeleton of line guiding mould by special use; Four twisted pair wire groups are embedded in four chambers, and stranded moulding simultaneously is for preventing to damage insulated wire cores; It is wrapped to add one deck polyester band, forms a highly stable cable core structure.Because crossing skeleton is softer and tiny, make cable have good flexibility simultaneously, make things convenient for cable wiring manufacture.And say that from setting angle crossing skeleton has improved the tensile property and the anti-extrusion performance of cable, and aspect bending required, because crossing skeleton is arranged, even cable is crooked excessive, the construction of cable was not easy also to change.
The screen of this kind shield type numeral symmetrical cable adopts the double-layer aluminum-foil shielding, and screen is carried out fixing further through outer belting layer.When the frequency of interfere with electromagnetic field is higher, utilize the eddy current that produces in the metal material of low-resistivity, externally come electromagnetic wave to form negative function, thereby reach the effect of shielding.If can not carry out effective filtering to data line, that just requires in the 30-1000MHz scope, interference such as radio frequency, static to be shielded.Cable shield must cooperate with outer cover through 360 ° metallic bone.The screen of this kind shield type numeral symmetrical cable adopts the double-layer aluminum-foil shielding.For the electromagnetic wave more than 10 MHz, utilize reflection, absorption and the kelvin effect of screen to eliminate external electromagnetic interference and externally electromagnetic radiation.So-called kelvin effect is meant that electric current is tending towards conductive surface in the distribution of cross-sectional area of conductor with the rising of frequency.Frequency is high more, and skin depth is more little, promptly electromagnetic penetration capacity more a little less than.Therefore, frequency is high more, and the effect of screen is obvious more.Electromagnetic wave can only see through the thick aluminium foil of 38 μ m when frequency surpasses 5 MHz.If the thickness of screen surpasses 38 μ m, just make through screen and get into the inner electromagnetic interference frequency of cable mainly below 5 MHz, and can effectively offset with the equilibrium response of twisted pair wire group for the low-frequency disturbance below 5 MHz.
When adopting the twisted pair wire group, the pair twist pitch is more little, and anti-interference just good more, transmission band is just high more.When the pair twist pitch is l=25n (mm) (n>1), nearly 20 dB of attenuation.This kind shield type numeral symmetrical cable pair twist pitch is 16.4mm-17.8mm, and during for the low-frequency disturbance below 5 MHz, working condition is good, and when data frequency is higher the may command cross-talk.
The invention has the beneficial effects as follows: a kind of shield type numeral of the present invention symmetrical cable, have good flexibility, make things convenient for cable wiring manufacture.And say that from setting angle crossing skeleton has improved the tensile property and the anti-extrusion performance of cable, and aspect bending required, even owing to there is the crossing skeleton cable crooked excessive, cable structure was not easy also to change.This kind shield type numeral symmetrical cable makes cable use the equilibrium response of twisted pair wire group effectively to offset in low-frequency disturbance through the setting of pair twist pitch; Thereby guarantee that cable working condition when low-frequency disturbance is good, and when data frequency is higher the may command cross-talk.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Wherein: belting layer in the 1-crossing skeleton, 2-, 3-screen, the outer belting layer of 4-, 5-oversheath, 6-core, 7-insulating barrier, 8-chamber.
Embodiment
Specify the preferred embodiments of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, present embodiment provides a kind of shield type numeral symmetrical cable, comprises the crossing skeleton 1, interior belting layer 2, screen 3, outer belting layer 4 and the oversheath 5 that are outwards set gradually by the center; Said crossing skeleton 1 with said in belting layer 2 form four chambers 8, be equipped with the twisted pair wire group in each said chamber 8, said twisted pair wire group is that two the insulated single line is stranded forms; Said insulated single wire comprises core 6 and insulating barrier 7, and said core 6 is wrapped with insulating barrier 7, and said core 6 is the annealed copper core; Said insulating barrier 7 is solid polyethylene layer, and said crossing skeleton 1 is a polyethylene crossing skeleton 1, and the external diameter of said crossing skeleton 1 is 4.8mm; The vane thickness of said crossing skeleton 1 is 0.023mm, and said interior belting layer 2 is the polyester band, and said screen 3 is the double-layer aluminum-foil screen; Said outer belting layer 4 is the polyester band; Said oversheath 5 is the polyolefin oversheath, and the pair twist pitch of said twisted pair wire group is 16.8mm, and the diameter of said copper core is 0.574mm; The thickness of said oversheath 5 is 0.65mm, is filled with waterproofing rope in the said chamber 8.
A kind of shield type numeral of present embodiment symmetrical cable adopts softer low density polyethylene (LDPE) crossing skeleton, make crossing skeleton 1 can isolate twisted pair wire group and stable electrical cable structure, but crossing skeleton 1 should not be too big, and external diameter is 4.8mm, and vane thickness is 0.023mm.When stranding, cross the fixedly position of twisted pair wire group and crossing skeleton 1 of line guiding mould by special use; Four twisted pair wire groups are embedded in four chambers 8, and stranded moulding simultaneously is for preventing to damage insulated wire cores; It is wrapped to add one deck polyester band, forms a highly stable cable core structure.Owing to the cross bone, 1 is softer and tiny, makes cable have good flexibility, makes things convenient for cable wiring manufacture simultaneously.And say that from setting angle crossing skeleton 1 has improved the tensile property and the anti-extrusion performance of cable, and aspect bending required, because crossing skeleton 1 is arranged, even cable is crooked excessive, the construction of cable was not easy also to change.
The screen of this kind shield type numeral symmetrical cable adopts the double-layer aluminum-foil shielding, and carries out fixing further through 4 pairs of screens of outer belting layer 3.When the frequency of interfere with electromagnetic field is higher, utilize the eddy current that produces in the metal material of low-resistivity, externally come electromagnetic wave to form negative function, thereby reach the effect of shielding.If can not carry out effective filtering to data line, that just requires in the 30-1000MHz scope, interference such as radio frequency, static to be shielded.Cable shield must cooperate with outer cover through 360 ° metallic bone.The screen of this kind shield type numeral symmetrical cable adopts the double-layer aluminum-foil shielding.For the electromagnetic wave more than 10 MHz, utilize reflection, absorption and the kelvin effect of screen 3 to eliminate external electromagnetic interference and externally electromagnetic radiation.So-called kelvin effect is meant that electric current is tending towards conductive surface in the distribution of cross-sectional area of conductor with the rising of frequency.Frequency is high more, and skin depth is more little, promptly electromagnetic penetration capacity more a little less than.Therefore, frequency is high more, and the effect of screen 3 is obvious more.Electromagnetic wave can only see through the thick aluminium foil of 38 μ m when frequency surpasses 5 MHz.If the thickness of screen 3 surpasses 38 μ m, just make through screen 3 and get into the inner electromagnetic interference frequency of cables mainly below 5 MHz, and can effectively offset with the equilibrium response of twisted pair wire group for the low-frequency disturbance below 5 MHz.
When adopting the twisted pair wire group, the pair twist pitch is more little, and anti-interference just good more, transmission band is just high more.When the pair twist pitch is l=25n (mm) (n>1), nearly 20 dB of attenuation.This kind shield type numeral symmetrical cable pair twist pitch is 16.4mm-17.8mm, and during for the low-frequency disturbance below 5 MHz, working condition is good, and when data frequency is higher the may command cross-talk.
The beneficial effect of present embodiment is: a kind of shield type numeral of present embodiment symmetrical cable, have good flexibility, and make things convenient for cable wiring manufacture.And say that from setting angle crossing skeleton has improved the tensile property and the anti-extrusion performance of cable, and aspect bending required, even owing to there is the crossing skeleton cable crooked excessive, cable structure was not easy also to change.This kind shield type numeral symmetrical cable makes cable use the equilibrium response of twisted pair wire group effectively to offset in low-frequency disturbance through the setting of pair twist pitch; Thereby guarantee that cable working condition when low-frequency disturbance is good, and when data frequency is higher the may command cross-talk.
Claims (5)
1. shield type numeral symmetrical cable; It is characterized in that: comprise the crossing skeleton (1) that is outwards set gradually by the center, interior belting layer (2), screen (3), outer belting layer (4) and oversheath (5), said crossing skeleton (1) forms four chambers (8) with said interior belting layer (2), is equipped with the twisted pair wire group in each said chamber (8); Said twisted pair wire group is that two the insulated single line is stranded forms; Said insulated single wire comprises core (6) and insulating barrier (7), and said core (6) is wrapped with insulating barrier (7), and said core (6) is the annealed copper core; Said insulating barrier (7) is solid polyethylene layer; Said crossing skeleton (1) is polyethylene crossing skeleton (1), and the external diameter of said crossing skeleton (1) is 4.5mm-5.2mm, and the vane thickness of said crossing skeleton (1) is 0.021mm-0.03mm; Belting layer (2) is the polyester band in said; Said screen (3) is the double-layer aluminum-foil screen, and said outer belting layer (4) is the polyester band, and said oversheath (5) is the polyolefin oversheath.
2. a kind of shield type numeral symmetrical cable as claimed in claim 1, it is characterized in that: the pair twist pitch of said twisted pair wire group is 16.4mm-17.8mm.
3. according to claim 1 or claim 2 a kind of shield type numeral symmetrical cable, it is characterized in that: the diameter of said copper core is 0.57mm-0.58mm.
4. according to claim 1 or claim 2 a kind of shield type numeral symmetrical cable, it is characterized in that: the thickness of said oversheath (5) is 0.6-0.7mm.
5. according to claim 1 or claim 2 a kind of shield type numeral symmetrical cable, it is characterized in that: said chamber is filled with waterproofing rope in (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102527674A CN102779579A (en) | 2012-07-20 | 2012-07-20 | Shielding type digital symmetrical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102527674A CN102779579A (en) | 2012-07-20 | 2012-07-20 | Shielding type digital symmetrical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102779579A true CN102779579A (en) | 2012-11-14 |
Family
ID=47124459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102527674A Pending CN102779579A (en) | 2012-07-20 | 2012-07-20 | Shielding type digital symmetrical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102779579A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871671A (en) * | 2014-02-27 | 2014-06-18 | 安徽江淮电缆集团有限公司 | Improved computer cable |
| CN103943213A (en) * | 2014-03-28 | 2014-07-23 | 安徽长风电缆集团有限公司 | Ultraviolet-proof reinforcing cable |
| CN104036871A (en) * | 2014-06-30 | 2014-09-10 | 江苏亨通线缆科技有限公司 | Anti-interference symmetric communication cable |
| CN104332224A (en) * | 2013-09-13 | 2015-02-04 | 昆山市巴城镇顺拓工程机械配件厂 | Fireproof cable |
| CN104751995A (en) * | 2013-12-25 | 2015-07-01 | 江苏亨通线缆科技有限公司 | High-frequency and high-speed data transmission cable |
| CN107086068A (en) * | 2017-04-20 | 2017-08-22 | 浙江兆龙线缆有限公司 | The data transmission cable and preparation method of a kind of discontinuous discontinuous metal tape cladding |
| CN109119195A (en) * | 2018-09-11 | 2019-01-01 | 台山市电缆厂有限责任公司 | A kind of cable using polyvinyl chloride insulation sheath |
| CN109411126A (en) * | 2018-11-29 | 2019-03-01 | 广州宇洪科技股份有限公司 | 5G intelligent wiring system high-frequency digital communication cable and its manufacturing method |
| CN109686490A (en) * | 2019-02-25 | 2019-04-26 | 张家港特恩驰电缆有限公司 | A kind of unmasked cable |
| CN109727717A (en) * | 2019-02-28 | 2019-05-07 | 华迅工业(苏州)有限公司 | A kind of antistatic grid line of rail traffic |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993895Y (en) * | 2006-12-06 | 2007-12-19 | 江苏江扬电缆有限公司 | Indoor-outdoor high performance data cable |
| CN201266510Y (en) * | 2009-01-21 | 2009-07-01 | 河南科信电缆有限公司 | Communication cable |
| US20100000760A1 (en) * | 2006-08-02 | 2010-01-07 | Adc Gmbh | Balanced data cable for communications and data technology |
| JP2010232092A (en) * | 2009-03-27 | 2010-10-14 | Hitachi Cable Ltd | Shielded twisted-pair cable |
| CN202711847U (en) * | 2012-07-20 | 2013-01-30 | 安徽江淮电缆集团有限公司 | Shielded type digital symmetrical cable |
-
2012
- 2012-07-20 CN CN2012102527674A patent/CN102779579A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100000760A1 (en) * | 2006-08-02 | 2010-01-07 | Adc Gmbh | Balanced data cable for communications and data technology |
| CN200993895Y (en) * | 2006-12-06 | 2007-12-19 | 江苏江扬电缆有限公司 | Indoor-outdoor high performance data cable |
| CN201266510Y (en) * | 2009-01-21 | 2009-07-01 | 河南科信电缆有限公司 | Communication cable |
| JP2010232092A (en) * | 2009-03-27 | 2010-10-14 | Hitachi Cable Ltd | Shielded twisted-pair cable |
| CN202711847U (en) * | 2012-07-20 | 2013-01-30 | 安徽江淮电缆集团有限公司 | Shielded type digital symmetrical cable |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332224A (en) * | 2013-09-13 | 2015-02-04 | 昆山市巴城镇顺拓工程机械配件厂 | Fireproof cable |
| CN104751995B (en) * | 2013-12-25 | 2017-01-25 | 江苏亨通线缆科技有限公司 | High-frequency and high-speed data transmission cable |
| CN104751995A (en) * | 2013-12-25 | 2015-07-01 | 江苏亨通线缆科技有限公司 | High-frequency and high-speed data transmission cable |
| CN103871671A (en) * | 2014-02-27 | 2014-06-18 | 安徽江淮电缆集团有限公司 | Improved computer cable |
| CN103943213A (en) * | 2014-03-28 | 2014-07-23 | 安徽长风电缆集团有限公司 | Ultraviolet-proof reinforcing cable |
| CN104036871A (en) * | 2014-06-30 | 2014-09-10 | 江苏亨通线缆科技有限公司 | Anti-interference symmetric communication cable |
| CN104036871B (en) * | 2014-06-30 | 2016-06-01 | 江苏亨通线缆科技有限公司 | Anti-interference symmetrical communication cable |
| CN107086068A (en) * | 2017-04-20 | 2017-08-22 | 浙江兆龙线缆有限公司 | The data transmission cable and preparation method of a kind of discontinuous discontinuous metal tape cladding |
| CN109119195A (en) * | 2018-09-11 | 2019-01-01 | 台山市电缆厂有限责任公司 | A kind of cable using polyvinyl chloride insulation sheath |
| CN109119195B (en) * | 2018-09-11 | 2020-04-21 | 安徽鸿杰电缆有限公司 | Cable adopting polyvinyl chloride insulating sheath |
| CN109411126A (en) * | 2018-11-29 | 2019-03-01 | 广州宇洪科技股份有限公司 | 5G intelligent wiring system high-frequency digital communication cable and its manufacturing method |
| CN109686490A (en) * | 2019-02-25 | 2019-04-26 | 张家港特恩驰电缆有限公司 | A kind of unmasked cable |
| CN109727717A (en) * | 2019-02-28 | 2019-05-07 | 华迅工业(苏州)有限公司 | A kind of antistatic grid line of rail traffic |
| CN109727717B (en) * | 2019-02-28 | 2024-04-05 | 华迅工业(苏州)有限公司 | Antistatic network wire for rail transit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102779579A (en) | Shielding type digital symmetrical cable | |
| CN201673727U (en) | Armoured shielding type audio-frequency cable for ship and oceaneering | |
| CN204966157U (en) | Stretch -proofing shielded cable of low smoke and zero halogen | |
| CN202711847U (en) | Shielded type digital symmetrical cable | |
| CN202332403U (en) | Flame-retardant waterproof composite shielding high-frequency digital cable | |
| CN202549475U (en) | Metallic shielded power cable | |
| CN206312632U (en) | Communication composite power cable | |
| CN202373377U (en) | Light insulation communication cable with thin wall and for navy ship | |
| CN201532797U (en) | Strong interference resistant shielding tensile control cable | |
| CN204904875U (en) | Fire -retardant digital communication cable of high frequency for naval vessel | |
| CN201247647Y (en) | FBC-H1 type on-site bus cable | |
| CN204926848U (en) | Two core composite cable are twisted with one heart in environmental protection and energy saving | |
| CN101335107B (en) | Control electric cable for nuclear power plant | |
| CN203325493U (en) | High-speed multimedia data cable | |
| CN203787198U (en) | High-strength extrusion-preventive copper cable | |
| CN206236441U (en) | A kind of weak-current cable | |
| CN104392796A (en) | Compact anti-interference composite cable | |
| CN200997323Y (en) | Multifunctional assembled cable | |
| CN204143912U (en) | Anti-interference data cable | |
| CN204045269U (en) | Hidden-type high-speed data communication cable | |
| CN202940061U (en) | Anti-electromagnetic interference cable used for communication | |
| CN204884606U (en) | 4G is hyperfrequency, superelevation bandwidth communication cable for network | |
| CN203573718U (en) | Fine steel wire braided reinforcing silicone rubber insulation power cable | |
| CN202940060U (en) | Cable used for communication | |
| CN203787190U (en) | Cable for ships |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121114 |