CN105405514B - The low-loss composite data cable of high shielding properties - Google Patents

The low-loss composite data cable of high shielding properties Download PDF

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Publication number
CN105405514B
CN105405514B CN201510848088.7A CN201510848088A CN105405514B CN 105405514 B CN105405514 B CN 105405514B CN 201510848088 A CN201510848088 A CN 201510848088A CN 105405514 B CN105405514 B CN 105405514B
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sheath
sub
twisted wire
twisted
pitch
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CN105405514A (en
Inventor
王惠兵
吕秀云
孙国跃
吴士杰
刘党荣
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Jiangsu Hengtong Wire and Cable Technology Co Ltd
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Jiangsu Hengtong Wire and Cable Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/04—Cables with twisted pairs or quads with pairs or quads mutually positioned to reduce cross-talk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/005—Quad constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/20—Cables having a multiplicity of coaxial lines
    • H01B11/206—Tri-conductor coaxial cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08—Screens specially adapted for reducing cross-talk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1895—Particular features or applications
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/184—Sheaths comprising grooves, ribs or other projections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/221—Longitudinally placed metal wires or tapes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/228—Metal braid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2806—Protection against damage caused by corrosion

Abstract

The present invention discloses a kind of low-loss composite data cable of high shielding properties, including：Steel conductor, coaxial conductor, eight copper conductors and oversheath body；Eight copper conductors are twisted two-by-two forms four pairs of twisted wires pair as information communication；Oversheath body includes the first sub- sheath, the second sub- sheath and the 3rd sub- sheath, there is " people " font connecting portion at this first sub- sheath, the second sub- sheath and the 3rd sub- sheath center, first sub- sheath is coated on the steel conductor outside surfaces, second sub- sheath is coated on the first inner restrictive coating outer surface, and the 3rd sub- sheath is coated on the second inner restrictive coating outer surface；Some plain conductors are spaced, and for plain conductor one ends wound in the steel conductive surface, the plain conductor other end is electrically connected to the proof copper-wire braided screen layer.The present invention greatly reduces the cross-talk of the communications cable, reduces mutual capacitively coupled, while has taken into account other electric parameters, it also avoid the increase of electric signal delay inequality.

Description

The low-loss composite data cable of high shielding properties
Technical field
The present invention relates to the low-loss composite data cable of a kind of communication cable, more particularly to a kind of high shielding properties.
Background technology
Worldwide, China is in terms of electric wire, it has also become production the biggest in the world and country of consumption.With digitlization The fast development of technology, computer are not only applied in various industrial plants in large quantities, and in all kinds of offices even Obtain more widely popularizing in residential building.Continuous expansion, the extension of computer network, and the drastically increasing of transmission information content Add, on the one hand make to arrange net is incremented by with data cable dosage with larger amplitude;On the other hand it is higher to require that data cable has again Transmission speed, broader transmission bandwidth, to realize quick, the accurate transmission of information.Its transmission speed scope also from 10Mbps develops to 10000Mbps, and it is contemplated that increasing due to the traffic, network speed will in the near future 1000Mbps can be substantially exceeded, this can provide a kind of electric property more excellent data cable with regard to an urgent demand people；Common list The structure of one type communication cable：Its primary structure of the cable of pair twist structure is that one layer of insulation is extruded outside copper conductor, after single line pair twist Stranding, outside use the structure of polyolefin oversheath, and coaxial cable primary structure is that inner wire extrudes outside or wrapped one layer insulate, Then using aluminium foil or braiding as structure of the polyolefin after outer conductor as oversheath, due to the said structure office of communication cable Limit, in exterior finish distributing system, automated detection system, cause to stretch that larger, quality is unstable, wiring is cumbersome, can not Lean on and influence performance.
The content of the invention
The present invention provides a kind of low-loss composite data cable of high shielding properties, this low-loss composite data cable Further reduce the cross-talk and electric signal delay inequality of the communications cable, and avoid the power attenuation of signal, improve signal power With the stability of performance.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：A kind of low-loss compound number of high shielding properties According to cable, including：Steel conductor, coaxial conductor, eight copper conductors for being coated with polyethylene layer and oversheath body；The coaxial conductor Outer surface is coated with plastic insulating layer, and this plastic insulating layer outer surface is coated with the first wire sheathing, the first inner restrictive coating bag It is overlying on the first wire sheathing outer surface；
Eight copper conductors are twisted two-by-two forms four pairs of twisted wires pair to be communicated as information, the four twisted pair wires centering the One twisted wire to, the second twisted wire to, the 3rd twisted wire pair and the 4th twisted wire to be arranged in order counterclockwise and it is twisted form conductive cable core, the One twisted wire pair and the 3rd twisted wire pair are with the second twisted wire pair and the 4th twisted wire to spaced, and four twisted pair wire is to respective outer surface Foil shielding layer is coated with, a polyester belt is coated on described around the foil shielding layer outer surface, the second inner restrictive coating is wrapped in Polyester belt outer surface；
The oversheath body includes the first sub- sheath, the second sub- sheath and the 3rd sub- sheath, this first sub- sheath, the second son There is " people " font connecting portion, the first of this " people " font connecting portion connects muscle portion, second at sheath and the 3rd sub- sheath center Even muscle portion and the 3rd company's muscle portion are connected respectively to the described first sub- sheath, the second sub- sheath and the 3rd sub- sheath, the first sub- sheath The steel conductor outside surfaces are coated on, the second sub- sheath is coated on the first inner restrictive coating outer surface, the 3rd sub- sheath cladding In the second inner restrictive coating outer surface；
Some plain conductors are spaced, and this plain conductor one ends wound is another in the steel conductive surface, plain conductor One end sequentially passes through the described first sub- sheath, first company's muscle portion, the 3rd company's muscle portion and the 3rd sub- sheath and is electrically connected to the copper Silk woven shield；
The pitch of first twisted wire pair is 15 ~ 15.5mm, and the pitch of second twisted wire pair is 13.5 ~ 13.9mm, institute The pitch for stating the 3rd twisted wire pair is 14.2 ~ 14.6mm, and the pitch of the 4th twisted wire pair is 12.7 ~ 13.1mm；
Adjacent segments are away from design formula：0.002<∣—∣≤0.013,
Being separated by pitch design formula is：0.001<∣—∣≤0.011；
H1 is the pitch of the first twisted wire pair, and h2 is the pitch of the second twisted wire pair or the 4th twisted wire pair, and h3 is the 3rd twisted wire To pitch.
Further improved technology scheme is as follows in above-mentioned technical proposal：
1st, in such scheme, the four twisted pair wires strand forms conductive cable core, and this conductive cable core twisting pitch is the 4th 7.7 ~ 9.8 times to pitch of twisted wire.
2nd, in such scheme, the steel conductor and copper conductor are handled by annealing process.
3rd, in such scheme, the foil shielding layer is made up of the aluminium foil layer of laminated polyester film and face on its inside, institute It is 0.020 ± 0.002mm to state laminated polyester film thickness, and the aluminium foil layer thickness is 0.014 ± 0.002 mm.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
1st, the low-loss composite data cable of the high shielding properties of the present invention, had both effectively solved cable in work progress In environment it is complicated, such as in distribution system in the power supply-distribution system and building of computer room the wiring tape of cable come it is many Inconvenience, cable can produce certain electromagnetic field when running around, so as to disturb other systems, equipment can be caused to run when serious The other problems such as failure；Avoid and pull cable, there is preferable tensile strength and elongation percentage, both ensure the self-supporting for meeting cable Ability, while also solve the problems, such as that cable interferes in the process of running, it is ensured that transmission characteristic it is steady in a long-term, have again Have the advantages that emergency maintenance it is convenient, can Reusability, there is obvious economic benefit and promotional value, be amenable to environment temperature The test of material rising-heat contracting-cold during change, therefore the service life of cable can be extended, it is not easy to be corroded, service life length.
2nd, the low-loss composite data cable of the high shielding properties of the present invention, breaches circle of traditional strand to stranding after line Shape structure, effectively improve communication cable cross-talk（NEXT、FEXT）The surplus of index 1%, or even also improve loss （INSERTION LOSS）1dB surpluses, increase characteristic impedance（IMPEDANCE）1.5% stability, while ensuring cable While the transmission performance of stabilization, the performance of the transmission electricity of copper cable is added.
3rd, the low-loss composite data cable of the high shielding properties of the present invention, twisted to string pitch collocation using specific and Specific conductive cable core combines into core pitch with twisting to line, reduces transmitting telecommunication number and electromagnetic induction shadow is produced on its loop Ring, greatly reduce the cross-talk of the communications cable, wherein electric field caused by capacitive sensing has both positive and negative polarity, after adjacent two induction fields superposition It can cancel each other, reduce mutual capacitively coupled, while take into account other electric parameters, it also avoid electric signal delay inequality Increase.
4th, the low-loss composite data cable of the high shielding properties of the present invention, it includes the alternate row of some plain conductors Row, for this plain conductor one ends wound in the steel conductive surface, the plain conductor other end sequentially passes through the described first sub- sheath, the One company's muscle portion, the 3rd company's muscle portion and the 3rd sub- sheath are simultaneously electrically connected to the proof copper-wire braided screen layer, reduce the string of the communications cable Sound and electric signal delay inequality, the power attenuation and signal reflex for avoiding signal return transmission source, improve signal power and performance Stability；Secondly, it includes, and some plain conductors are spaced, and this plain conductor one ends wound is in the steel conductor table Face, the plain conductor other end sequentially pass through the described first sub- sheath, first company's muscle portion, the 3rd company's muscle portion and the 3rd sub- sheath and electricity Be connected to the proof copper-wire braided screen layer, and adjacent 2 plain conductors at intervals of conductive cable core twisting pitch 2.4 ~ 3.7 times, further reduce the cross-talk and electric signal delay inequality of the communications cable, and avoid the power attenuation of signal, improve letter The stability of number power and performance.
Brief description of the drawings
Accompanying drawing 1 is the low-loss composite data construction of cable schematic diagram one of the high shielding properties of the present invention；
Accompanying drawing 2 is the partial structural diagram of accompanying drawing 1；
Accompanying drawing 3 is the low-loss composite data construction of cable schematic diagram two of the high shielding properties of the present invention.
In the figures above：1st, steel conductor；2nd, coaxial conductor；3rd, copper conductor；31st, polyethylene layer；4th, oversheath body；41st, One sub- sheath；42nd, the second sub- sheath；43rd, the 3rd sub- sheath；5th, plastic insulating layer；6th, the first wire sheathing；7th, the first interior shield Jacket layer；8th, conductive cable core；81st, the first twisted wire pair；82nd, the second twisted wire pair；83rd, the 3rd twisted wire pair；84th, the 4th twisted wire pair；9th, aluminium Paper tinsel screen layer；10th, polyester belt；11st, the second inner restrictive coating；12nd, " people " font connecting portion；121st, first connects muscle portion；122nd, second Even muscle portion；123rd, the 3rd connects muscle portion；13rd, plain conductor；14th, proof copper-wire braided screen layer；15th, the second wire sheathing.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Embodiment 1：A kind of low-loss composite data cable of high shielding properties, including：Steel conductor 1, coaxial conductor 2, Eight copper conductors 3 and oversheath body 4 for being coated with polyethylene layer 31；The outer surface of coaxial conductor 2 is coated with plastic insulating layer 5, this outer surface of plastic insulating layer 5 is coated with the first wire sheathing 6, and the first inner restrictive coating 7 is coated on first metal and compiled The outer surface of tissue layer 6；
Eight copper conductors 3 are twisted two-by-two forms four pairs of twisted wires pair as information communication, the four twisted pair wires centering First twisted wire to the 81, second twisted wire to the 82, the 3rd twisted wire to 83 and the 4th twisted wire be arranged in order and twisted formed counterclockwise to 84 Conductive cable core 8, the first twisted wire to 81 and the 3rd twisted wire to 83 with the second twisted wire to 82 and the 4th twisted wire it is spaced to 84, it is described Four twisted pair wires are coated with foil shielding layer 9 to respective outer surface, and a polyester belt 10 is around being wrapped in the appearance of foil shielding layer 9 Face, the second inner restrictive coating 11 are coated on the outer surface of polyester belt 10；
The oversheath body 4 includes the first sub- sheath 41, the second sub- 42 and the 3rd sub- sheath 43 of sheath, this first sub- sheath 41st, there is " people " font connecting portion 12, this " people " font connecting portion 12 at the second sub- 42 and the 3rd sub- center of sheath 43 of sheath First company's muscle portion 121, second connect muscle portion 122 and the 3rd and connect muscle portion 123 and be connected respectively to described first the 41, second son of sub- sheath 42 and the 3rd sub- sheath 43 of sheath, the first sub- sheath 41 are coated on the outer surface of steel conductor 1, and the second sub- sheath 42 is coated on institute The outer surface of the first inner restrictive coating 7 is stated, the 3rd sub- sheath 43 is coated on the outer surface of the second inner restrictive coating 11；
Proof copper-wire braided screen layer 14 is provided between the 3rd sub- inner restrictive coating 11 of sheath 43 and first, can not both be increased External diameter, the tractive force needed can be ensured again, so as to ensure that the adhesion between the 3rd sub- inner restrictive coating 11 of sheath 43 and first Property, serve humidification, have very big tensile strength, can also eliminate or reduce cable in movement or twisting states Stress, improve the service life of cable；Secondly, it further enhancing interference free performance.
Some plain conductors 13 are spaced, and this one ends wound of plain conductor 13 is led in the surface of steel conductor 1, metal The other end of line 13 sequentially passes through the described first sub- sheath 41, first and connects the company of muscle portion the 121, the 3rd 123 and the 3rd sub- sheath 43 of muscle portion And it is electrically connected to the proof copper-wire braided screen layer 14；Adjacent 2 plain conductors 13 at intervals of the twisting pitch of conductive cable core 8 2.4 ~ 3.7 times；
First twisted wire is 15 ~ 15.5mm to 81 pitch, second twisted wire to 82 pitch for 13.5 ~ 13.9mm, the 3rd twisted wire are 14.2 ~ 14.6mm to 83 pitch, the 4th twisted wire to 84 pitch for 12.7 ~ 13.1mm；
Adjacent segments are away from design formula：0.002<∣—∣≤0.013,
Being separated by pitch design formula is：0.001<∣—∣≤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 the Three twisted wires to 83 pitch.
First twisted wire is 15.2mm to 81 pitch, and second twisted wire is 13.7mm to 82 pitch, described Three twisted wires are 14.4mm to 83 pitch, and the 4th twisted wire is 12.9mm to 84 pitch.
Above-mentioned four twisted pair wires strand forms conductive cable core 8, and this twisting pitch of conductive cable core 8 is the 4th twisted wire to 84 pitches 9.8 times.
Above-mentioned foil shielding layer 9 is made up of the aluminium foil layer of laminated polyester film and face on its inside, the laminated polyester film Thickness is 0.020 ± 0.002mm, and the aluminium foil layer thickness is 0.014 ± 0.002 mm；Above-mentioned first connects muscle portion, second company's muscle Portion and the adjacent angle of first company's muscle portion are 120 °；Above-mentioned steel conductor 1 and copper conductor 3 are handled by annealing process.
Embodiment 2：A kind of low-loss composite data cable of high shielding properties, including：Steel conductor 1, coaxial conductor 2, Eight copper conductors 3 and oversheath body 4 for being coated with polyethylene layer 31；The outer surface of coaxial conductor 2 is coated with plastic insulating layer 5, this outer surface of plastic insulating layer 5 is coated with the first wire sheathing 6, and the first inner restrictive coating 7 is coated on first metal and compiled The outer surface of tissue layer 6；One second wire sheathing 15 is provided between first inner restrictive coating, the 7 and second sub- sheath 42, so as to have Beneficial to mutual coupling is further reduced, signal transmission quality is improved；
Eight copper conductors 3 are twisted two-by-two forms four pairs of twisted wires pair as information communication, the four twisted pair wires centering First twisted wire to the 81, second twisted wire to the 82, the 3rd twisted wire to 83 and the 4th twisted wire be arranged in order and twisted formed counterclockwise to 84 Conductive cable core 8, the first twisted wire to 81 and the 3rd twisted wire to 83 with the second twisted wire to 82 and the 4th twisted wire it is spaced to 84, it is described Four twisted pair wires are coated with foil shielding layer 9 to respective outer surface, and a polyester belt 10 is around being wrapped in the appearance of foil shielding layer 9 Face, the second inner restrictive coating 11 are coated on the outer surface of polyester belt 10；
The oversheath body 4 includes the first sub- sheath 41, the second sub- 42 and the 3rd sub- sheath 43 of sheath, this first sub- sheath 41st, there is " people " font connecting portion 12, this " people " font connecting portion 12 at the second sub- 42 and the 3rd sub- center of sheath 43 of sheath First company's muscle portion 121, second connect muscle portion 122 and the 3rd and connect muscle portion 123 and be connected respectively to described first the 41, second son of sub- sheath 42 and the 3rd sub- sheath 43 of sheath, the first sub- sheath 41 are coated on the outer surface of steel conductor 1, and the second sub- sheath 42 is coated on institute The outer surface of the first inner restrictive coating 7 is stated, the 3rd sub- sheath 43 is coated on the outer surface of the second inner restrictive coating 11；
Proof copper-wire braided screen layer 14 is provided between the 3rd sub- inner restrictive coating 11 of sheath 43 and first, can not both be increased External diameter, the tractive force needed can be ensured again, so as to ensure that the adhesion between the 3rd sub- inner restrictive coating 11 of sheath 43 and first Property, serve humidification, have very big tensile strength, can also eliminate or reduce cable in movement or twisting states Stress, improve the service life of cable；Secondly, it further enhancing interference free performance.
Some plain conductors 1 are spaced, and this one ends wound of plain conductor 13 is led in the surface of steel conductor 1, metal The other end of line 13 sequentially passes through the described first sub- sheath 41, first and connects the company of muscle portion the 121, the 3rd 123 and the 3rd sub- sheath 43 of muscle portion And it is electrically connected to the proof copper-wire braided screen layer 14；Adjacent 2 plain conductors 13 at intervals of the twisting pitch of conductive cable core 8 2.4 ~ 3.7 times；
First twisted wire is 15.1mm to 81 pitch, and second twisted wire is 13.5mm to 82 pitch, described Three twisted wires are 14.3mm to 83 pitch, and the 4th twisted wire is 12.8mm to 84 pitch；
Adjacent segments are away from design formula：0.002<∣—∣≤0.013,
Being separated by pitch design formula is：0.001<∣—∣≤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 the Three twisted wires to 83 pitch.
Above-mentioned four twisted pair wires strand forms conductive cable core 8, and this twisting pitch of conductive cable core 8 is the 4th twisted wire to 84 pitches 7.7 times.
The above is further described below.
The design of aluminum foil material
According to communication cable standard and requirement, shielding is made up of one layer of one side clad aluminum foil and a drain wire, and one side is multiple Close aluminium foil requirement and refer to following table：
The technical requirements of one side clad aluminum foil
Weave copper wire material used design
According to communication cable standard and requirement, the braided material of armor can be single circular copper wire or tin-plating round copper wire, Unidirectional sub-thread broken string length is allowed to be not more than 150mm, broken string termination should be trimmed
The main performance index of finished cable
Conductor DC resistance（20℃）：≤9 6Ω/km；
The characteristic impedance of paired cable（20℃）：100±15Ω；
The characteristic impedance of coaxial cable（20℃）：75±15Ω；
The insulaion resistance of cable：≥10000 MΩ·km.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, it should all be included within the scope of the present invention.

Claims (4)

  1. A kind of 1. low-loss composite data cable of high shielding properties, it is characterised in that：Including：Steel conductor（1）, coaxial conductor （2）, eight pieces be coated with polyethylene layer（31）Copper conductor（3）With oversheath body（4）；The coaxial conductor（2）Outer surface coats There is plastic insulating layer（5）, this plastic insulating layer（5）Outer surface is coated with the first wire sheathing（6）, the first inner restrictive coating（7） It is coated on first wire sheathing（6）Outer surface；
    Eight copper conductors（3）It is twisted two-by-two and forms four pairs of twisted wires pair to be communicated as information, the four twisted pair wires centering the One twisted wire pair（81）, the second twisted wire pair（82）, the 3rd twisted wire pair（83）With the 4th twisted wire pair（84）It is arranged in order and twists counterclockwise Conjunction forms conductive cable core（8）, the first twisted wire pair（81）With the 3rd twisted wire pair（83）With the second twisted wire pair（82）With the 4th twisted wire pair （84）Spaced, four twisted pair wire is coated with foil shielding layer to respective outer surface（9）, a polyester belt（10）Around being wrapped in The foil shielding layer（9）Outer surface, the second inner restrictive coating（11）It is coated on the polyester belt（10）Outer surface；
    The oversheath body（4）Including the first sub- sheath（41）, the second sub- sheath（42）With the 3rd sub- sheath（43）, this first son Sheath（41）, the second sub- sheath（42）With the 3rd sub- sheath（43）There is " people " font connecting portion at center（12）, this " people " Font connecting portion（12）First connect muscle portion（121）, second connect muscle portion（122）Connect muscle portion with the 3rd（123）It is connected respectively to institute State the first sub- sheath（41）, the second sub- sheath（42）With the 3rd sub- sheath（43）, the first sub- sheath（41）The steel is coated on to lead Body（1）Outer surface, the second sub- sheath（42）It is coated on first inner restrictive coating（7）Outer surface, the 3rd sub- sheath（43）Cladding In second inner restrictive coating（11）Outer surface；
    Some plain conductors（13）It is spaced, this plain conductor（13）One ends wound is in the steel conductor（1）Surface, metal Wire（13）The other end sequentially passes through the described first sub- sheath（41）, first connect muscle portion（121）, the 3rd connect muscle portion（123）With Three sub- sheaths（43）And it is electrically connected to proof copper-wire braided screen layer（14）；
    First twisted wire pair（81）Pitch be 15 ~ 15.5mm, second twisted wire pair（82）Pitch for 13.5 ~ 13.9mm, the 3rd twisted wire pair（83）Pitch be 14.2 ~ 14.6mm, the 4th twisted wire pair（84）Pitch for 12.7 ~ 13.1mm；
    Adjacent segments are away from design formula：0.002<∣—∣≤0.013,
    Being separated by pitch design formula is：0.001<∣—∣≤0.011；
    H1 is the first twisted wire pair（81）Pitch, h2 is the second twisted wire pair（82）Or the 4th twisted wire pair（84）Pitch, h3 is 3rd twisted wire pair（83）Pitch；
    Adjacent 2 plain conductors（13）At intervals of conductive cable core（8）2.4 ~ 3.7 times of twisting pitch, described first connects It is 120 ° that muscle portion, second company's muscle portion and first, which connect the adjacent angle of muscle portion,.
  2. 2. the low-loss composite data cable of high shielding properties according to claim 1, it is characterised in that：Described four pairs Twisted wire strand forms conductive cable core（8）, this conductive cable core（8）Twisting pitch is the 4th twisted wire pair（84）7.7 ~ 9.8 times.
  3. 3. according to the low-loss composite data cable of the high shielding properties described in claim 1, it is characterised in that：It is described Foil shielding layer（9）It is made up of the aluminium foil layer of laminated polyester film and face on its inside, the laminated polyester film thickness is 0.020 ± 0.002mm, the aluminium foil layer thickness are 0.014 ± 0.002 mm.
  4. 4. according to the low-loss composite data cable of the high shielding properties described in claim 1, it is characterised in that：The steel Conductor（1）And copper conductor（3）Handled by annealing process.
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