CN103871560B - The anti-interference railway digital signal cable of a kind of low smoke and zero halogen - Google Patents
The anti-interference railway digital signal cable of a kind of low smoke and zero halogen Download PDFInfo
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- CN103871560B CN103871560B CN201410065310.1A CN201410065310A CN103871560B CN 103871560 B CN103871560 B CN 103871560B CN 201410065310 A CN201410065310 A CN 201410065310A CN 103871560 B CN103871560 B CN 103871560B
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Abstract
The invention discloses the anti-interference railway digital signal cable of a kind of low smoke and zero halogen, comprise by multiple heart yearn; Each heart yearn comprises four through the conductor of star twisting and the one side aluminium-plastic tape coated in all four conductors outsides, the plastic layer of one side aluminium-plastic tape is towards outward, aluminum metal layer is towards interior, and each conductor comprises the wire being positioned at middle part and the low density polyethylene (LDPE) endodermis being coated on wire outside successively, physical blowing polyalkene foaming layer and polypropylene exodermis; By symmetrical parallel for multiple heart yearn longitudinal formation cable core, at the outside coated lapping layer of cable core, at outside coated first armour of lapping layer, at the outside coated separator of the first armour, at outside coated second armour of separator, at the coated restrictive coating in the outside of the second armour, described second armour adopts the vertical bag of compact arranged metal hollow pipe to be formed, described restrictive coating adopts low smoke and zero halogen cross-linked polyolefin to make, and described first armour and described second armour adopt different metals to make.The anti-interference railway digital signal cable of a kind of low smoke and zero halogen that the present invention proposes, its moisture-proof anticorrosive, shield effectiveness are good, and stretching-resisting bending-resisting song is good, Flame-retardant low-smoke environmental protection.
Description
Technical field
The present invention relates to field of cable technology, particularly relate to the anti-interference railway digital signal cable of a kind of low smoke and zero halogen.
Background technology
For a long time, due to the deficiency existed by material and configuration aspects, make that cable uses its tensile strength in railway systems, bending resistance is difficult to adapt to instructions for use, evil idea in damaged condition causes communication failure.
The both direction of current railway locomotive development, one is that passenger traffic adopts high speed motor car, and two is heavy tractions that shipping adopts marshalling of growing up.High speed motor car and heavy traction are had higher requirement to fail safe and comfortableness, in existing internal screening railway digital signal cable production process, what the anti-interference railway digital signal cable of common railway low smoke and zero halogen adopted is the anti-interference railway digital signal cable of plastic sheath low smoke and zero halogen or the anti-interference railway digital signal cable of composite sheath low smoke and zero halogen.The coated mode mainly adopting wrapped or vertical bag of its shielding; adopt the internal screening railway digital signal cable that this two kinds of modes are produced; often can there are the quality problems that copper strips bottom pour ladle or copper strips seam crossing split; due to the non-conductive gap that the discontinuous of shield and shield different piece junction are formed; capital produces electromagnetic leakage; have a strong impact on the shielding properties of cable, cause great potential safety hazard to railway transportation.Therefore, the shielding of cable is not very desirable, run into interference more serious time, the distortion of Signal transmissions can be caused.
Summary of the invention
In order to solve the technical problem existed in background technology, the present invention proposes the anti-interference railway digital signal cable of a kind of low smoke and zero halogen, its moisture-proof anticorrosive, shield effectiveness are good, and stretching-resisting bending-resisting song is good, Flame-retardant low-smoke environmental protection.
The anti-interference railway digital signal cable of a kind of low smoke and zero halogen that the present invention proposes, comprises by multiple heart yearn; Each heart yearn comprises four through the conductor of star twisting and the one side aluminium-plastic tape coated in all four conductors outsides, the plastic layer of one side aluminium-plastic tape is towards outward, aluminum metal layer is towards interior, and each conductor comprises the wire being positioned at middle part and the low density polyethylene (LDPE) endodermis being coated on wire outside successively, physical blowing polyalkene foaming layer and polypropylene exodermis; By symmetrical parallel for multiple heart yearn longitudinal formation cable core, at the outside coated lapping layer of cable core, at outside coated first armour of lapping layer, at the outside coated separator of the first armour, at outside coated second armour of separator, at the coated restrictive coating in the outside of the second armour, described second armour adopts the vertical bag of compact arranged metal hollow pipe to be formed, described restrictive coating adopts low smoke and zero halogen cross-linked polyolefin to make, and described first armour and described second armour adopt different metals to make.
Preferably, described first armour adopts the form of metal net, and its coverage rate is greater than 75%.。
Preferably, the metal hollow pipe that described second armour adopts is cylindrical, hollow pipe.
Preferably, the metal hollow pipe of described second armour adopts silver-plated steel to make.
Preferably, described wire adopts copper core or tin-coated copper core.
Preferably, described separator adopts laminated polyester film, and thickness is 0.2-0.3mm.
In the present invention, the insulating barrier of the conductor in heart yearn adopts skin-bubble-Pi physical blowing polyolefin insulation layer, such that cable attenuation is little, when electric capacity is equal, diameter is little, cost is low, moistureproof oil resistance is good; By four conductor star twistings, make two pairs of conductors respectively in symmetric position, form a stable unit quad, by external equipment, cross-talk can not be reduced to greatest extent; Heart yearn is symmetrical arranged in cable, strengthens mutual interference between heart yearn; At the outside coated one side aluminium-plastic tape of four conductors through star twisting, its aluminum metal layer plays the effect of internal shield, and plastic layer protection conductor, plays the effect of Moisture-proof corrosion-proof; Second armour adopts compact arranged metal hollow pipe to indulge the form of bag, compared with indulging bag, can protect cable further not by outside destroy, and save material with common metal band, lightweight; Double armor layer adopts two kinds of different metals to make, and realizes the effect of outer shielding layer, and together with the aluminum metal layer of one side aluminium-plastic tape, electromagnetic wave shielding plays complementation, and shield effectiveness will be better; Low smoke and zero halogen cross-linked polyolefin sheath layer protection metal armor layers, and there is fire-retardant effect, the nontoxic low cigarette of the gas of releasing during burning.
In preferred version of the present invention, the cylindrical metal hollow tube that the second armour adopts silver-plated steel to make, compared with the metal hollow pipe of other shapes, its mechanical performance is better, and stressed more balanced, the material of silver-plated steel further enhancing shield effectiveness; First armour adopts coverage rate to be greater than the form of the metal net of 75%, structurally compensate for the shield effectiveness that may occur when the second armour indulges bag not enough.
Accompanying drawing explanation
Fig. 1 is the structural representation of the anti-interference railway digital signal cable of a kind of low smoke and zero halogen that the present invention proposes.
Embodiment
As shown in Figure 1, Fig. 1 is the structural representation of the anti-interference railway digital signal cable of a kind of low smoke and zero halogen that the present invention proposes.
With reference to Fig. 1, the anti-interference railway digital signal cable of a kind of low smoke and zero halogen that the present invention proposes, comprises four heart yearns.
Comprise four conductors 1 and the plastic-aluminum combined layer 2 of one side in each heart yearn, conductor 1 comprises the copper conductor 11 being positioned at centre.At the outside coated low density polyethylene (LDPE) endodermis 12 of copper conductor 11, physical blowing polyalkene foaming layer 13, polypropylene exodermis 14, the insulating barrier of this seed coat-bubble-skin structure makes that cable attenuation is little, diameter is little when electric capacity is equal, cost is low, moistureproof oil resistance is good.
By four conductor 1 star twistings, make two pairs of conductors 1 respectively in symmetric position, form a stable unit quad, reduce cross-talk to greatest extent.At the plastic-aluminum combined layer 2 of the outside coated one side of all four conductors 1; conductor 1 tightens together towards interior by the plastic layer of the plastic-aluminum combined layer of one side 2; its plastic layer protection skin-bubble-Pi physical blowing polyolefin insulation layer; play the effect of Moisture-proof corrosion-proof; aluminum metal layer plays the effect of internal shield, is each heart yearn shielding electromagnetic wave and interference.
By four symmetrical parallel longitudinal formation cable cores of heart yearn, outside lapping layer 3 is tightly strapped in together.Four heart yearns are symmetrical arranged in cable, strengthen the anti-electromagnetic disturbance between heart yearn.Outside coated first armour 4 of lapping layer 3, it adopts the form of the copper mesh grid of coverage rate 80%.The outside coated thickness of first armour 4 is the laminated polyester film 5 of 0.3mm, outside coated second armour 6 of laminated polyester film 5, and its cylindrical, hollow metal tube adopting silver-plated steel to make indulges packet form.
The outside coated low smoke and zero halogen cross-linked polyolefin sheath layer 7 of second armour 6, restrictive coating 7 adopts low smoke and zero halogen cross-linked polyolefin, makes cable realize low smoke and zero halogen in burning, environmental sound.
In cable uses, the insulating barrier of conductor 1 adopts skin-bubble-Pi physical blowing polyolefin insulation layer, such that cable attenuation is little, when electric capacity is equal, diameter is little, cost is low, moistureproof oil resistance is good.Further, by four conductor star twistings, make two pairs of conductors respectively in symmetric position, form a stable unit quad.This heart yearn is arranged by external equipment, can not reduce cross-talk to greatest extent.First armour 4, second armour 6 and one side aluminium-plastic tape 3 adopt metal net respectively, silver-plated steel hollow metal pipe indulges bag and the form of continuous aluminum metal layer, and adopt copper, steel, silver, aluminium different metal to make, this all plays in electromagnetic wave shielding complementation in material and structure, and shield effectiveness strengthens.In addition, laminated polyester film 5 as separator, prevents the phenomenon of multipoint earthing between the first armour 4, second armour 6.
When cable is subject to external force, the first armour 4, second armour 6 forms double armor together, and axis and radial direction protect cable.Further, the second armour 6 adopts compact arranged cylindrical, hollow metal tube to indulge the form of bag, and compared with indulging bag with common metal band, its uniform force, protects cable not by outside destroy especially diametrically.In addition, the restrictive coating 7 that low smoke and zero halogen cross-linked polyolefin is made protects metal armor layers, has the effect of moisture retardant, the nontoxic low cigarette of the gas of releasing during burning.
Preferably, the low smoke and zero halogen cross-linked polyolefin that restrictive coating 7 adopts comprises following component by mass fraction: 100 parts of EVA, 30-45 part HDPE, 70-100 part Firebrake ZBs, 1-5 part silane coupler, 5-15 part paraffin, 1-5 part calcium stearate, 0.5-5 part phosphite ester, 10-15 part nano-calcium carbonates; Particularly, 100 parts of EVA, 30 parts of HDPE, 80 parts of Firebrake ZBs, 2 parts of silane couplers, 7 parts of paraffin, 3 parts of calcium stearates, 2 parts of phosphite esters, 10 parts of nano-calcium carbonates.The obtained restrictive coating 7 of this low smoke and zero halogen cross-linked polyolefin has that mechanical performance is high, high temperature resistant, fire resistance is high, LSZH during burning.It protects the second armour 6, and has fire-retardant effect, the nontoxic low cigarette of the gas of releasing during burning.
According to the anti-interference railway digital signal cable of the low smoke and zero halogen of the present embodiment, after testing, the insulation resistance at 20 DEG C under 500V DC condition >=10000M Ω km; Each conductor connects shielding to other conductor and metallic sheath capacitive coupling coefficient is 0.8KHz ~ 1.0kHzpF/km; Mean value≤81 of K1, maximum :≤330; Under 150kHz between loop in near-end crosstalk attenuation group >=51 [51] dB/1000m, between group >=55 [65] dB/1000m; Smoke density >=80%; PH value >=7.3; Conductivity≤10 μ S/mm.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (5)
1. the anti-interference railway digital signal cable of low smoke and zero halogen, is characterized in that, comprises by multiple heart yearn, each heart yearn comprises four conductors through star twisting (1) and the one side aluminium-plastic tape (2) coated in all four conductors (1) outsides, the plastic layer of one side aluminium-plastic tape (2) is towards outward, aluminum metal layer is towards interior, and each conductor (1) comprises the wire (11) being positioned at middle part and the low density polyethylene (LDPE) endodermis (12) being coated on wire (11) outside successively, physical blowing polyalkene foaming layer (13) and polypropylene exodermis (14), by symmetrical parallel for multiple heart yearn longitudinal formation cable core, the outside coated lapping layer (3) of cable core, outside coated first armour (4) of lapping layer (3), the outside coated separator (5) of the first armour (4), outside coated second armour (6) of separator (5), in the coated restrictive coating in the outside (7) of the second armour (6), described second armour (6) adopts the vertical bag of compact arranged metal hollow pipe to be formed, described restrictive coating (7) adopts low smoke and zero halogen cross-linked polyolefin to make, described first armour (4) and described second armour (6) adopt different metals to make, the metal hollow pipe that described second armour (6) adopts is cylindrical, hollow pipe.
2. the anti-interference railway digital signal cable of low smoke and zero halogen according to claim 1, is characterized in that, described first armour (4) adopts the form of metal net, and its coverage rate is greater than 75%.
3. the anti-interference railway digital signal cable of low smoke and zero halogen according to claim 1, is characterized in that, the metal hollow pipe of described second armour (6) adopts silver-plated steel to make.
4. the anti-interference railway digital signal cable of low smoke and zero halogen according to claim 1, is characterized in that, described wire (1) adopts copper core or tin-coated copper core.
5. the anti-interference railway digital signal cable of low smoke and zero halogen according to claim 1, is characterized in that, described separator (5) adopts laminated polyester film, and thickness is 0.2-0.3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410065310.1A CN103871560B (en) | 2014-02-23 | 2014-02-23 | The anti-interference railway digital signal cable of a kind of low smoke and zero halogen |
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| CN201410065310.1A CN103871560B (en) | 2014-02-23 | 2014-02-23 | The anti-interference railway digital signal cable of a kind of low smoke and zero halogen |
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| CN103871560A CN103871560A (en) | 2014-06-18 |
| CN103871560B true CN103871560B (en) | 2015-12-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106098184B (en) * | 2016-07-07 | 2017-11-07 | 扬州中大电缆有限公司 | A kind of high reliability cable for rail transit vehicles |
| CN108257728B (en) * | 2018-01-17 | 2023-08-15 | 上海电气集团腾恩驰科技(苏州)有限公司 | Discontinuous shielding tape for data communication cable and manufacturing method thereof |
| CN108831597A (en) * | 2018-05-02 | 2018-11-16 | 沪如科技南京有限公司 | A kind of ceramic silica gel cable |
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| CN202473348U (en) * | 2012-03-27 | 2012-10-03 | 安徽天龙电器线缆集团有限公司 | Two-core data cable used for rail haulage motor |
| CN202677961U (en) * | 2012-06-29 | 2013-01-16 | 江苏亨通线缆科技有限公司 | Data-signal flexible cable used for city track traffic |
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2014
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| US4783576A (en) * | 1987-10-01 | 1988-11-08 | Pirelli Cable Corporation | High voltage gas filled pipe type cable |
| CN1162822A (en) * | 1997-02-14 | 1997-10-22 | 吴江市盛泽通信电缆厂 | skin/foam/skin physical foaming cable and manufacturing process thereof |
| CN200959252Y (en) * | 2006-09-29 | 2007-10-10 | 江苏东强股份有限公司 | Low-smoke and low-halogen light-rail telecommunication cable |
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