CN105469898A - Overhead low-loss data transmission line composite cable - Google Patents

Overhead low-loss data transmission line composite cable Download PDF

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Publication number
CN105469898A
CN105469898A CN201510979853.9A CN201510979853A CN105469898A CN 105469898 A CN105469898 A CN 105469898A CN 201510979853 A CN201510979853 A CN 201510979853A CN 105469898 A CN105469898 A CN 105469898A
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CN
China
Prior art keywords
sheath
twisted wire
pitch
twisted
wire
Prior art date
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Pending
Application number
CN201510979853.9A
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Chinese (zh)
Inventor
吕秀云
王惠兵
吴士杰
孙国跃
刘党荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Hengtong Wire and Cable Technology Co Ltd
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Jiangsu Hengtong Wire and Cable Technology Co Ltd
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Publication date
Application filed by Jiangsu Hengtong Wire and Cable Technology Co Ltd filed Critical Jiangsu Hengtong Wire and Cable Technology Co Ltd
Priority to CN201310113817.5A priority Critical patent/CN103236317B/en
Publication of CN105469898A publication Critical patent/CN105469898A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/007Communication cables or conductors for overhead application
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/04Cables with twisted pairs or quads with pairs or quads mutually positioned to reduce cross-talk
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/06Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/06Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08Screens specially adapted for reducing cross-talk
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/12Arrangements for exhibiting specific transmission characteristics
    • H01B11/125Specially adapted cable interconnections
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/003Power cables including electrical control or communication wires
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/008Power cables for overhead application
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients

Abstract

The present invention disclose an overhead low-loss data transmission line composite cable. Eight copper wires of the composite cable are twisted in pairs to form four twisted pairs for information communication; a first twisted pair, a second twisted pair, a third twisted pair and a fourth twisted pair in the four twisted pairs are sequentially arranged anticlockwise and twisted to form a conductive cable core; and the first twisted pair and the third twisted pair as well as the second twisted pair and the fourth twisted pair are arranged at intervals. An outer sheath comprises a first branch sheath, a second branch sheath and a third branch sheath, wherein a herringbone connection part is arranged in the center of the first branch sheath, the second branch sheath and the third branch sheath. A steel conductor, a first metal braided layer and a copper wire braided shield layer are electrically connected by a plurality of metal wires arranged in parallel at intervals and located in the outer sheath and the herringbone connection part. The cable ensures the long-term stability of the transmission characteristic, has the advantages of convenience for emergency maintenance, reusability and the like, and has significant economic benefits and promotional values.

Description

Overhead type low-loss data line composite rope
Technical field
The present invention relates to a kind of telecommunication cable, particularly relate to a kind of overhead type low-loss data line composite rope.
Background technology
The structure of common single type telecommunication cable: its primary structure of the cable of pair twist structure is extrude one deck insulation outside copper conductor, stranding after single line pair twist, outside adopts the structure of polyolefin oversheath, coaxial cable primary structure is extrude outside inner wire or the insulation of wrapped one deck, then adopt aluminium foil or braiding as the structure of polyolefin after outer conductor as oversheath, because the said structure of telecommunication cable limits to, in exterior finish distributing system, automated detection system, cause that stretching is comparatively large, quality is unstable, it is loaded down with trivial details to connect up, unreliable and affect serviceability.
Summary of the invention
The invention provides a kind of overhead type low-loss data line composite rope, the compound communications cable of this low-loss ensure that the long-term stability of transmission characteristic, have again emergency maintenance convenient, can the advantage such as Reusability, there is obvious economic benefit and promotional value, the test of material rising-heat contracting-cold when can stand variation of ambient temperature, therefore can extend the useful life of cable, not easily be corroded, long service life.
For achieving the above object, the technical solution used in the present invention is: a kind of overhead type low-loss data line composite rope, comprising: steel conductor, coaxial conductor, eight copper conductor and oversheath bodies being coated with polyethylene layer; Described coaxial conductor outer surface is coated with plastic insulating layer, and this plastic insulating layer outer surface is coated with the first wire sheathing, and the first inner restrictive coating is coated on described first wire sheathing outer surface;
The stranded formation four between two of described eight copper conductors is to the twisted wire pair as information communication, described four twisted pair wire centering first twisted wires to, the second twisted wire to, the 3rd twisted wire to the 4th twisted wire to being arranged in order counterclockwise and stranded formation conductive cable core, first twisted wire to the 3rd twisted wire pair and the second twisted wire to the 4th twisted wire to alternately, described four twisted pair wires are all coated with foil shielding layer to respective outer surface, one polyester belt is wrapped in described foil shielding layer outer surface, and the second inner restrictive coating is coated on described polyester belt outer surface;
Described oversheath body comprises the first sub-sheath, the second sub-sheath and the 3rd sub-sheath, this first sub-sheath, the second sub-sheath and the 3rd sub-sheath center have one " people " font connecting portion, first of this " people " font connecting portion connects muscle portion, second and is even even connected respectively to described first sub-sheath, the second sub-sheath and the 3rd sub-sheath in muscle portion in muscle portion and the 3rd, first sub-sheath is coated on described steel conductor outside surfaces, second sub-sheath is coated on described first inner restrictive coating outer surface, and the 3rd sub-sheath is coated on described second inner restrictive coating outer surface;
Described steel conductor, the first wire sheathing and proof copper-wire braided screen are by being positioned at the plain conductor electrical connection of some parallel spaced-apart arrangements of oversheath body and " people " font connecting portion;
The right pitch of described first twisted wire is 15 ~ 15.5mm, and the right pitch of described second twisted wire is 13.5 ~ 13.9mm, and the right pitch of described 3rd twisted wire is 14.2 ~ 14.6mm, and the right pitch of described 4th twisted wire is 12.7 ~ 13.1mm;
Adjacent segments apart from design formula is: 0.002< ∣ - ∣≤0.013,
Pitch design of being separated by formula is: 0.002< ∣ - ∣≤0.011;
H1 is the right pitch of the first twisted wire, h2 be the second twisted wire to or the right pitch of the 4th twisted wire, h3 is the right pitch of the 3rd twisted wire;
The right pitch of described first twisted wire is 15.2mm, and the right pitch of described second twisted wire is 13.7mm, and the right pitch of described 3rd twisted wire is 14.4mm, and the right pitch of described 4th twisted wire is 12.9mm.
In technique scheme, further improvement opportunity scheme is as follows:
1, in such scheme, 2.4 ~ 3.7 times that are spaced apart conductive cable core twisting pitch of described adjacent 2 plain conductors.
2, in such scheme, described four twisted pair wire strands form conductive cable core, and this conductive cable core twisting pitch is that the 4th twisted wire is to 7.7 ~ 9.8 of pitch times.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1, overhead type low-loss data line composite rope of the present invention, both the circumstance complication of cable in work progress had effectively been solved, such as in the distribution system in the power supply-distribution system and building of machine room, the wiring of cable brings many inconvenience, cable can produce certain electromagnetic field when running around, thus interference other system, can the other problems such as equipment operation failure be caused time serious; Avoid and pull cable, there is good tensile strength and elongation, both guaranteed the self-bearing ability meeting cable, and also solved the problem of cable interference mutually in running simultaneously, ensure that the long-term stability of transmission characteristic, have again emergency maintenance convenient, can the advantage such as Reusability, have obvious economic benefit and promotional value, when can stand variation of ambient temperature, the test of material rising-heat contracting-cold, therefore can extend the useful life of cable, not easily be corroded, long service life.
2, overhead type low-loss data line composite rope of the present invention, breach the circular configuration of traditional strand to stranding after line, effectively improve the surplus of communication cable cross-talk (NEXT, FEXT) index 1%, even also improve the 1dB surplus of loss (INSERTIONLOSS), increase by 1.5% stability of characteristic impedance (IMPEDANCE), simultaneously while guaranteeing the transmission performance that cable is stable, add the performance of the transmission electricity of copper cable.
3, overhead type low-loss data line composite rope of the present invention, specific strand is adopted to become core pitch to combine line with strand to string pitch collocation and specific conductive cable core, reduce transmission of electric signals on its loop, produce electromagnetic induction impact, greatly reduce the cross-talk of the communications cable, the electric field that wherein capacitive sensing produces has both positive and negative polarity, can cancel each other after adjacent two induction field superpositions, reduce mutual capacitively coupled, taken into account other electric parameter, it also avoid signal of telecommunication delay inequality increases simultaneously.
4, overhead type low-loss data line composite rope of the present invention, its steel conductor, the first wire sheathing and proof copper-wire braided screen are by being positioned at the plain conductor electrical connection of some parallel spaced-apart arrangements of oversheath body and " people " font connecting portion, reduce cross-talk and the signal of telecommunication delay inequality of the communications cable, and avoid the power loss of signal, improve the stability of signal power and performance; Secondly, steel conductor, the first wire sheathing and proof copper-wire braided screen are by being positioned at the plain conductor electrical connection of some parallel spaced-apart arrangements of oversheath body and " people " font connecting portion, and 2.4 ~ 3.7 times that are spaced apart conductive cable core twisting pitch of described adjacent 2 plain conductors, reduce cross-talk and the signal of telecommunication delay inequality of the communications cable further.
Accompanying drawing explanation
Accompanying drawing 1 is overhead type low-loss data line composite rope structural representation one of the present invention;
Accompanying drawing 2 is the partial structurtes schematic diagram of accompanying drawing 1;
Accompanying drawing 3 is overhead type low-loss data line composite rope structural representation two of the present invention.
In above accompanying drawing: 1, steel conductor; 2, coaxial conductor; 3, copper conductor; 31, polyethylene layer; 4, oversheath body; 41, the first sub-sheath; 42, the second sub-sheath; 43, the 3rd sub-sheath; 5, plastic insulating layer; 6, the first wire sheathing; 7, the first inner restrictive coating; 8, conductive cable core; 81, the first twisted wire pair; 82, the second twisted wire pair; 83, the 3rd twisted wire pair; 84, the 4th twisted wire pair; 9, foil shielding layer; 10, polyester belt; 11, the second inner restrictive coating; 12, " people " font connecting portion; 121, first connects muscle portion; 122, second connects muscle portion; 123, the 3rd connects muscle portion; 13, plain conductor; 131, the first branch end; 132, the second branch end; 133, the 3rd branch end; 14, proof copper-wire braided screen; 15, the second wire sheathing.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1: a kind of overhead type low-loss data line composite rope, comprising: steel conductor 1, coaxial conductor 2, eight are coated with copper conductor 3 and the oversheath body 4 of polyethylene layer 31; Described coaxial conductor 2 outer surface is coated with plastic insulating layer 5, and this plastic insulating layer 5 outer surface is coated with the first wire sheathing 6, first inner restrictive coating 7 and is coated on described first wire sheathing 6 outer surface;
The stranded formation four between two of described eight copper conductors 3 is to the twisted wire pair as information communication, described four twisted pair wire centering first twisted wires to the 81, second twisted wire to the 82, the 3rd twisted wire to 83 and the 4th twisted wire be arranged in order counterclockwise and stranded formation conductive cable core 8 84, first twisted wire to 81 and the 3rd twisted wire to 83 and second twisted wire to 82 and the 4th twisted wire to 84 alternately, described four twisted pair wires are all coated with foil shielding layer 9 to respective outer surface, one polyester belt 10 is wrapped in described foil shielding layer 9 outer surface, and the second inner restrictive coating 11 is coated on described polyester belt 10 outer surface;
Described oversheath body 4 comprises the first sub-sheath 41, second sub-sheath 42 and the 3rd sub-sheath 43, this first sub-sheath 41, second sub-sheath 42 and the 3rd sub-sheath 43 center have one " people " font connecting portion 12, first of this " people " font connecting portion 12 connects muscle portion 121, second connects muscle portion 122 and the 3rd is even connected respectively to described first sub-sheath 41 in muscle portion 123, second sub-sheath 42 and the 3rd sub-sheath 43, first sub-sheath 41 is coated on described steel conductor 1 outer surface, second sub-sheath 42 is coated on described first inner restrictive coating 7 outer surface, 3rd sub-sheath 43 is coated on described second inner restrictive coating 11 outer surface,
Proof copper-wire braided screen 14 is provided with between described 3rd sub-sheath 43 and the first inner restrictive coating 11, both external diameter can not be increased, the tractive effort needed can be ensured again, thus ensure that the adhesive between the 3rd sub-sheath 43 and the first inner restrictive coating 11, serve humidification, there is very large tensile strength, also can eliminate or reduce the stress of cable when movement or twisting states, improve the useful life of cable; Secondly, further enhancing interference free performance.
Described steel conductor 1, first wire sheathing 6 and proof copper-wire braided screen 14 are electrically connected by the plain conductor 13 of the some parallel spaced-apart arrangements being positioned at oversheath body 4 and " people " font connecting portion 12,2.4 ~ 3.7 times that are spaced apart conductive cable core 8 twisting pitch of described adjacent 2 plain conductors 13, first branch end 131 of plain conductor 13 is connected to described steel conductor 1, second branch end 132 of plain conductor 13 is connected to described first wire sheathing 6, and the 3rd branch end 133 of plain conductor 13 is connected to described proof copper-wire braided screen 14;
Described first twisted wire is 15 ~ 15.5mm to the pitch of 81, and described second twisted wire is 13.5 ~ 13.9mm to the pitch of 82, and described 3rd twisted wire is 14.2 ~ 14.6mm to the pitch of 83, and described 4th twisted wire is 12.7 ~ 13.1mm to the pitch of 84;
Adjacent segments apart from design formula is: 0.002< ∣ - ∣≤0.013,
Pitch design of being separated by formula is: 0.002< ∣ - ∣≤0.011;
H1 be the first twisted wire to 81 pitch, h2 be the second twisted wire to 82 or the 4th twisted wire to 84 pitch, h3 be the 3rd twisted wire to 83 pitch.
Described first twisted wire is 15.2mm to the pitch of 81, and described second twisted wire is 13.7mm to the pitch of 82, and described 3rd twisted wire is 14.4mm to the pitch of 83, and described 4th twisted wire is 12.9mm to the pitch of 84.
Above-mentioned four twisted pair wire strands form conductive cable core 8, and this conductive cable core 8 twisting pitch is that the 4th twisted wire is to 9.8 of 84 pitches times.
Embodiment 2: a kind of overhead type low-loss data line composite rope, comprising: steel conductor 1, coaxial conductor 2, eight are coated with copper conductor 3 and the oversheath body 4 of polyethylene layer 31; Described coaxial conductor 2 outer surface is coated with plastic insulating layer 5, this plastic insulating layer 5 outer surface is coated with the first wire sheathing 6, first inner restrictive coating 7 is coated on described first wire sheathing 6 outer surface, has the second wire sheathing 15 between described first inner restrictive coating 7 and the second sub-sheath 42;
The stranded formation four between two of described eight copper conductors 3 is to the twisted wire pair as information communication, described four twisted pair wire centering first twisted wires to the 81, second twisted wire to the 82, the 3rd twisted wire to 83 and the 4th twisted wire be arranged in order counterclockwise and stranded formation conductive cable core 8 84, first twisted wire to 81 and the 3rd twisted wire to 83 and second twisted wire to 82 and the 4th twisted wire to 84 alternately, described four twisted pair wires are all coated with foil shielding layer 9 to respective outer surface, one polyester belt 10 is wrapped in described foil shielding layer 9 outer surface, and the second inner restrictive coating 11 is coated on described polyester belt 10 outer surface;
Described oversheath body 4 comprises the first sub-sheath 41, second sub-sheath 42 and the 3rd sub-sheath 43, this first sub-sheath 41, second sub-sheath 42 and the 3rd sub-sheath 43 center have one " people " font connecting portion 12, first of this " people " font connecting portion 12 connects muscle portion 121, second connects muscle portion 122 and the 3rd is even connected respectively to described first sub-sheath 41 in muscle portion 123, second sub-sheath 42 and the 3rd sub-sheath 43, first sub-sheath 41 is coated on described steel conductor 1 outer surface, second sub-sheath 42 is coated on described first inner restrictive coating 7 outer surface, 3rd sub-sheath 43 is coated on described second inner restrictive coating 11 outer surface,
Proof copper-wire braided screen 14 is provided with between described 3rd sub-sheath 43 and the first inner restrictive coating 11, both external diameter can not be increased, the tractive effort needed can be ensured again, thus ensure that the adhesive between the 3rd sub-sheath 43 and the first inner restrictive coating 11, serve humidification, there is very large tensile strength, also can eliminate or reduce the stress of cable when movement or twisting states, improve the useful life of cable; Secondly, further enhancing interference free performance.
Described steel conductor 1, second wire sheathing 15 and proof copper-wire braided screen 14 are electrically connected by the plain conductor 13 of the some parallel spaced-apart arrangements being positioned at oversheath body 4 and " people " font connecting portion 12,2.4 ~ 3.7 times that are spaced apart conductive cable core 8 twisting pitch of described adjacent 2 plain conductors 13, first branch end 131 of plain conductor 13 is connected to described steel conductor 1, second branch end 132 of plain conductor 13 is connected to described second wire sheathing 15, and the 3rd branch end 133 of plain conductor 13 is connected to described proof copper-wire braided screen 14;
Described first twisted wire is 15.1mm to the pitch of 81, and described second twisted wire is 13.5mm to the pitch of 82, and described 3rd twisted wire is 14.3mm to the pitch of 83, and described 4th twisted wire is 12.8mm to the pitch of 84;
Adjacent segments apart from design formula is: 0.002< ∣ - ∣≤0.013,
Pitch design of being separated by formula is: 0.002< ∣ - ∣≤0.011;
H1 be the first twisted wire to 81 pitch, h2 be the second twisted wire to 82 or the 4th twisted wire to 84 pitch, h3 be the 3rd twisted wire to 83 pitch.
Above-mentioned four twisted pair wire strands form conductive cable core 8, and this conductive cable core 8 twisting pitch is that the 4th twisted wire is to 7.7 of 84 pitches times.
Foregoing is further described below.
The design of aluminum foil material
According to telecommunication cable standard and requirement, shield and be made up of one deck one side clad aluminum foil and a drain wire, one side clad aluminum foil requires to refer to following table:
The technical requirement of one side clad aluminum foil
Weave copper wire material used design
According to telecommunication cable standard and requirement, the braided material of armour can be single circular copper wire or tin-plating round copper wire, and allow unidirectional sub-thread broken string length to be not more than 150mm, trimmed is answered in broken string termination
The main performance index of finished cable
Conductor DC resistance (20 DEG C) :≤96 Ω/km;
The characteristic impedance (20 DEG C) of paired cable: 100 ± 15 Ω;
The characteristic impedance (20 DEG C) of coaxial cable: 75 ± 15 Ω;
The insulation resistance of cable: >=10000M Ω km.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (3)

1. an overhead type low-loss data line composite rope, is characterized in that: comprising: steel conductor (1), coaxial conductor (2), eight copper conductor (3) and oversheath bodies (4) being coated with polyethylene layer (31); Described coaxial conductor (2) outer surface is coated with plastic insulating layer (5), and this plastic insulating layer (5) outer surface is coated with the first wire sheathing (6), and the first inner restrictive coating (7) is coated on described first wire sheathing (6) outer surface;
The stranded formation four between two of described eight copper conductors (3) is to the twisted wire pair as information communication, described four twisted pair wire centering first twisted wires are to (81), second twisted wire is to (82), 3rd twisted wire is arranged in order and stranded formation conductive cable core (8) (84) counterclockwise to (83) and the 4th twisted wire, first twisted wire to (81) and the 3rd twisted wire to (83) and the second twisted wire to (82) and the 4th twisted wire to (84) alternately, described four twisted pair wires are all coated with foil shielding layer (9) to respective outer surface, one polyester belt (10) is wrapped in described foil shielding layer (9) outer surface, second inner restrictive coating (11) is coated on described polyester belt (10) outer surface,
Described oversheath body (4) comprises the first sub-sheath (41), second sub-sheath (42) and the 3rd sub-sheath (43), this first sub-sheath (41), second sub-sheath (42) and the 3rd sub-sheath (43) center have one " people " font connecting portion (12), first of this " people " font connecting portion (12) connects muscle portion (121), second company muscle portion (122) and the 3rd connects muscle portion (123) and is connected respectively to described first sub-sheath (41), second sub-sheath (42) and the 3rd sub-sheath (43), first sub-sheath (41) is coated on described steel conductor (1) outer surface, second sub-sheath (42) is coated on described first inner restrictive coating (7) outer surface, 3rd sub-sheath (43) is coated on described second inner restrictive coating (11) outer surface,
Described steel conductor (1), the first wire sheathing (6) and proof copper-wire braided screen (14) are by being positioned at plain conductor (13) electrical connection of some parallel spaced-apart arrangements of oversheath body (4) and " people " font connecting portion (12);
Described first twisted wire is 15 ~ 15.5mm to the pitch of (81), and described second twisted wire is 13.5 ~ 13.9mm to the pitch of (82), and described 3rd twisted wire is 14.2 ~ 14.6mm to the pitch of (83), and described 4th twisted wire is 12.7 ~ 13.1mm to the pitch of (84);
Adjacent segments apart from design formula is: 0.002< ∣ - ∣≤0.013,
Pitch design of being separated by formula is: 0.002< ∣ - ∣≤0.011;
H1 is the pitch of the first twisted wire to (81), and h2 is the second twisted wire to (82) or the 4th twisted wire to the pitch of (84), and h3 is that the 3rd twisted wire is to the pitch of (83);
Described first twisted wire is 15.2mm to the pitch of (81), and described second twisted wire is 13.7mm to the pitch of (82), and described 3rd twisted wire is 14.4mm to the pitch of (83), and described 4th twisted wire is 12.9mm to the pitch of (84).
2. overhead type low-loss data line composite rope according to claim 1, is characterized in that: 2.4 ~ 3.7 times that are spaced apart conductive cable core (8) twisting pitch of described adjacent 2 plain conductors (13).
3. overhead type low-loss data line composite rope according to claim 1, is characterized in that: described four twisted pair wire strands form conductive cable core (8), this conductive cable core (8) twisting pitch is that the 4th twisted wire is to 7.7 ~ 9.8 of (84) times.
CN201510979853.9A 2013-04-03 2013-04-03 Overhead low-loss data transmission line composite cable Pending CN105469898A (en)

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CN111900684A (en) * 2020-08-07 2020-11-06 安徽航天电缆集团有限公司 Moisture-proof railway signal cable with cable separation limit

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