CN203826034U - Low smoke halogen-free anti-interference railway data signal electric cable - Google Patents
Low smoke halogen-free anti-interference railway data signal electric cable Download PDFInfo
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- CN203826034U CN203826034U CN201420077400.8U CN201420077400U CN203826034U CN 203826034 U CN203826034 U CN 203826034U CN 201420077400 U CN201420077400 U CN 201420077400U CN 203826034 U CN203826034 U CN 203826034U
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- armour
- low smoke
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- zero halogen
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Abstract
The utility model discloses a low smoke halogen-free anti-interference railway data signal electric cable comprising a plurality of core wires, each core wire comprises four conductors and a one side plastic-aluminum combined tape wrapped around the outer sides of all the four conductors, the conductors are intertwisted to form a star shape, and a plastic layer of the one side plastic-aluminum combined tape faces outwards while an aluminium metal layer faces inwards; each conductor comprises a conducting wire arranged at the central part, a low density polyethylene inner skin layer, a physical foaming polyolefin foaming layer and a polypropylene outer skin layer; the low density polyethylene inner skin layer, the physical foaming polyolefin foaming layer and the polypropylene outer skin layer are orderly wrapped around the conducting wire; a cable core is formed by symmetrically and lengthwise arranged the plurality of core wires in a parallel manner, the winding and wrapping layer is wrapped around the outer part of the cable core, a first armor layer is wrapped around the outer part of the winding and wrapping layer, an isolating layer is wrapped around the outer part of the first armor layer, a second armor layer is wrapped around the outer part of the isolating layer, a protection sleeve layer is wrapped around the outer part of the second armor layer, the second armor layer is formed by lengthwise wrapping metal hollow tubes that are tightly arranged, the protection sleeve layer is made of a low smoke halogen-free crosslinking polyolefin, and the first armor layer and the second armor layer are made of different metals.
Description
Technical field
The utility model relates to cable technology field, relates in particular 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 existing by material and structure aspects, make cable in railway systems, use its tensile strength, bending resistance to be difficult to adapt to instructions for use, evil idea in damaged condition causes communication failure.
The both direction of current railway locomotive development, the one, passenger traffic adopts high speed motor car, and the 2nd, shipping adopts the heavy traction of the 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 of its shielding is mainly the mode that adopts wrapped or vertical bag; adopt this two kinds of internal screening railway digital signal cables that mode is 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 of the discontinuous of shield and the formation of shield different piece junction; capital produces electromagnetic leakage; have a strong impact on the shielding properties of cable, caused great potential safety hazard to railway transportation.Therefore, the shielding of cable is not very desirable, runs into interference when more serious, can cause the distortion of signal transmission.
Utility model content
In order to solve the technical problem existing in background technology, the utility model 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, fire-retardant low cigarette environmental protection.
The anti-interference railway digital signal cable of a kind of low smoke and zero halogen the utility model proposes, comprises by multiple heart yearns; Each heart yearn comprises that four through the conductor of star twisting with at the outside coated one side aluminium-plastic tape of all four conductors, the plastic layer of one side aluminium-plastic tape towards outside, aluminum metal layer is towards interior, and each conductor comprises the wire that is positioned at middle part and low density polyethylene (LDPE) endodermis, physical blowing polyalkene foaming layer and the polypropylene exodermis that is coated on successively wire outside; By the vertical multiple heart yearn symmetrical parallel formation cable core of putting, at the outside coated lapping layer of cable core, at outside coated the first armour of lapping layer, at the outside coated separator of the first armour, at outside coated the second armour of separator, at the coated restrictive coating in the outside of the second armour, described the second armour adopts the vertical bag of compact arranged metal hollow pipe to form, described restrictive coating adopts low smoke and zero halogen cross-linked polyolefin to make, and described the first armour and described the second armour adopt different metals to make.
Preferably, described the first armour adopts the form of metal net, and its coverage rate is greater than 75%.。
Preferably, the metal hollow pipe that described the second armour adopts is cylindrical, hollow pipe.
Preferably, the metal hollow pipe of described the 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 utility model, the insulating barrier of the conductor in heart yearn adopts skin-bubble-Pi physical blowing polyolefin insulation layer, makes that cable attenuation is little, diameter is little in the situation that electric capacity is equal, 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, can, not by external equipment, reduce to greatest extent cross-talk; 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 anticorrosive erosion; The second armour adopts the form of the vertical bag of compact arranged metal hollow pipe, compared with the vertical bag of common metal band, can further protect cable not to be subject to outside destroy, and save material, lightweight; Double armor layer adopts two kinds of different metals to make, and realizes the effect of outer shielding layer, and with together with the aluminum metal layer of one side aluminium-plastic tape, plays complementation on electromagnetic wave shielding, and shield effectiveness will be better; Low smoke and zero halogen cross-linked polyolefin sheath layer protection metal armouring layer, and there is fire-retardant effect, the nontoxic low cigarette of gas of emitting when burning.
In preferred version of the present utility model, 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, stressed more balanced, and the material of silver-plated steel has further strengthened shield effectiveness; The first armour adopts coverage rate to be greater than the form of 75% metal net, the shield effectiveness deficiency that may occur while structurally having made up the vertical bag of the second armour.
Brief description of the drawings
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 utility model 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 utility model proposes.
With reference to Fig. 1, the anti-interference railway digital signal cable of a kind of low smoke and zero halogen the utility model proposes, comprises four heart yearns.
In each heart yearn, comprise the plastic-aluminum combined layer 2 of four conductors 1 and one side, conductor 1 comprises the copper conductor 11 in the middle of being positioned at.At the outside coated low density polyethylene (LDPE) endodermises 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 in the situation that 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 to greatest extent cross-talk.At the plastic-aluminum combined layer 2 of the outside coated one side of all four conductors 1; the plastic layer of the plastic-aluminum combined layer 2 of one side tightens together conductor 1 towards interior; its plastic layer protection skin-bubble-Pi physical blowing polyolefin insulation layer; play the effect of moisture-proof anticorrosive erosion; aluminum metal layer plays the effect of internal shield, is each heart yearn shielding electromagnetic wave and interference.
By vertical four the heart yearn symmetrical parallel formation cable core of putting, outside is tightly strapped in together with lapping layer 3.Four heart yearns are symmetrical arranged in cable, strengthen the anti-electromagnetic interference between heart yearn.Outside coated the first armour 4 of lapping layer 3, it adopts the form of the copper mesh grid of coverage rate 80%.The laminated polyester film 5 that the outside coated thickness of the first armour 4 are 0.3mm, outside coated the second armours 6 of laminated polyester film 5, it adopts the vertical packet form of cylindrical, hollow metal tube that silver-plated steel make.
The outside coated low smoke and zero halogen cross-linked polyolefin sheath layer 7 of the second armour 6, restrictive coating 7 adopts low smoke and zero halogen cross-linked polyolefin, makes cable in burning, realize low smoke and zero halogen, environmental sound.
In cable uses, the insulating barrier of conductor 1 adopts skin-bubble-Pi physical blowing polyolefin insulation layer, makes that cable attenuation is little, diameter is little in the situation that electric capacity is equal, cost is low, moistureproof oil resistance is good.And, by four conductor star twistings, make two pairs of conductors respectively in symmetric position, form a stable unit quad.This heart yearn setting can, not by external equipment, reduce cross-talk to greatest extent.The first armour 4, the second armour 6 and one side aluminium-plastic tape 3 adopt respectively the form of metal net, the vertical bag of silver-plated steel hollow metal pipe and 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, the second armour 6.
In the time that cable is subject to external force, the first armour 4, the second armour 6 form double armor together, upwards protect cable in axial and footpath.And the second armour 6 adopts the form of the vertical bag of compact arranged cylindrical, hollow metal tube, compared with the vertical bag of common metal band, it is stressed evenly, protects especially diametrically cable not to be subject to outside destroy.In addition, the restrictive coating 7 that low smoke and zero halogen cross-linked polyolefin is made is protected metal armouring layer, has the effect of moisture retardant, the nontoxic low cigarette of gas of emitting when 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 ZB, 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 carbonate; 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 restrictive coating 7 that this low smoke and zero halogen cross-linked polyolefin makes has that mechanical performance is high, high temperature resistant, fire resistance is high, LSZH when burning.It protects the second armour 6, and has fire-retardant effect, the nontoxic low cigarette of gas of emitting when 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 >=10000M Ω km at 20 DEG C under 500V DC condition; Other conductor is connect to shielding to each 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 >=and 51[51] dB/1000m, between group >=and 55[65] dB/1000m; Smoke density >=80%; PH value >=7.3; Conductivity≤10 μ S/mm.
The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; be equal to replacement or changed according to the technical solution of the utility model and utility model design thereof, within all should being encompassed in protection range of the present utility model.
Claims (6)
1. the anti-interference railway digital signal cable of low smoke and zero halogen, is characterized in that, comprises by multiple heart yearns, each heart yearn comprises four conductors through star twisting (1) and at the outside coated one side aluminium-plastic tape (2) of all four conductors (1), the plastic layer of one side aluminium-plastic tape (2) towards outside, aluminum metal layer is towards interior, and each conductor (1) comprises the low density polyethylene (LDPE) endodermis (12), physical blowing polyalkene foaming layer (13) and the polypropylene exodermis (14) that are positioned at the wire (11) at middle part and are coated on successively wire (11) outside, by the vertical multiple heart yearn symmetrical parallel formation cable core of putting, at the outside coated lapping layer (3) of cable core, at outside coated the first armour (4) of lapping layer (3), at the outside coated separator (5) of the first armour (4), at outside coated the second armour (6) of separator (5), at the coated restrictive coating (7) in the outside of the second armour (6), described the second armour (6) adopts the vertical bag of compact arranged metal hollow pipe to form, described restrictive coating (7) adopts low smoke and zero halogen cross-linked polyolefin to make, described the first armour (4) and described the second armour (6) adopt different metals to make.
2. the anti-interference railway digital signal cable of low smoke and zero halogen according to claim 1, is characterized in that, described the 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 that described the second armour (4) adopts is cylindrical, hollow pipe.
4. 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 the second armour (6) adopts silver-plated steel to make.
5. the anti-interference railway digital signal cable of low smoke and zero halogen according to claim 3, is characterized in that, described wire (1) adopts copper core or tin-coated copper core.
6. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420077400.8U CN203826034U (en) | 2014-02-23 | 2014-02-23 | Low smoke halogen-free anti-interference railway data signal electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420077400.8U CN203826034U (en) | 2014-02-23 | 2014-02-23 | Low smoke halogen-free anti-interference railway data signal electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826034U true CN203826034U (en) | 2014-09-10 |
Family
ID=51481508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420077400.8U Withdrawn - After Issue CN203826034U (en) | 2014-02-23 | 2014-02-23 | Low smoke halogen-free anti-interference railway data signal electric cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826034U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871560A (en) * | 2014-02-23 | 2014-06-18 | 安徽华海特种电缆集团有限公司 | Low-smoke halogen-free anti-interference digital signal cable for railway |
| CN107731402A (en) * | 2017-11-17 | 2018-02-23 | 江苏凯达电缆有限公司 | A kind of anti-interference polyvinyl chloride insulation LWA light wire armoured control cable of resistance to compression tension |
-
2014
- 2014-02-23 CN CN201420077400.8U patent/CN203826034U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871560A (en) * | 2014-02-23 | 2014-06-18 | 安徽华海特种电缆集团有限公司 | Low-smoke halogen-free anti-interference digital signal cable for railway |
| CN103871560B (en) * | 2014-02-23 | 2015-12-02 | 安徽华海特种电缆集团有限公司 | The anti-interference railway digital signal cable of a kind of low smoke and zero halogen |
| CN107731402A (en) * | 2017-11-17 | 2018-02-23 | 江苏凯达电缆有限公司 | A kind of anti-interference polyvinyl chloride insulation LWA light wire armoured control cable of resistance to compression tension |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140910 Effective date of abandoning: 20151202 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |