CN203325566U - Stretch-resistant low-loss composite data cable - Google Patents

Abstract

The utility model discloses a stretch-resistant low-loss composite data cable which comprises a steel conductor, a coaxial conductor, eight copper conducting wires and an outer sheath. The eight copper conducting wires are stranded pairwise to form four stranded wire pairs for information communication; the outer sheath comprises a first branch sheath, a second branch sheath and a third branch sheath, a 'herringbone' connecting portion is arranged in the center of space among the first branch sheath, the second branch sheath and the third branch sheath, the first branch sheath covers the outer surface of the copper conductor, the second branch sheath covers the outer surface of a first inner sheath layer, and the third branch sheath covers the outer surface of a second inner sheath layer; and a plurality of metal conducting wires are arranged at intervals, one end of each metal conducting wire is wound on the surface of the steel conductor, and the other end of each metal conducting wire is electrically connected to a copper wire braided shielding layer. The stretch-resistant low-loss composite data cable has the advantages that influence on the service performance of the cable due to mutual interference of signals is prevented, and the resistance to influence of signal interference and stretching on the service performance of the cable is greatly improved while the transmission characteristic of a communication cable product is guaranteed.

Description

The compound data cable of stretch-proof low-loss

Technical field

The utility model relates to a kind of telecommunication cable, relates in particular to the compound data cable of a kind of stretch-proof low-loss.

Background technology

The structure of common single type telecommunication cable: its primary structure of the cable of pair twist structure is that copper conductor extrudes one deck insulation outward, stranding after the single line pair twist, outside adopts the structure of polyolefin oversheath, the coaxial cable primary structure is that inner wire extrudes outward or the insulation of wrapped one deck, then adopt aluminium foil or weave as polyolefin after outer conductor the structure as oversheath, said structure limitation due to telecommunication cable, in exterior finish distributing system, automated detection system, cause that stretching is large, quality is unstable, it is loaded down with trivial details to connect up, unreliable and affect serviceability.

Summary of the invention

The utility model provides a kind of stretch-proof low-loss compound data cable, and this low-loss communications cable further reduces cross-talk and the signal of telecommunication delay inequality of the communications cable, and has avoided the power loss of signal, has improved the stability of signal power and performance.

For achieving the above object, the technical solution adopted in the utility model is: the compound data cable of a kind of stretch-proof low-loss comprises: steel conductor, coaxial conductor, eight copper conductor and oversheath bodies that are 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 the first wire sheathing outer surface;

Described eight copper conductors are four pairs of twisted wires pair as information communication of stranded formation in twos, described four twisted pair wire centering the 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 conduction cable core, the 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 all are coated with foil shielding layer to outer surface separately, 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, the first muscle section of company, second of this " people " font connecting portion connects muscle section and the 3rd muscle section of company is connected to respectively the described first sub-sheath, the second sub-sheath and the 3rd sub-sheath, the first sub-sheath is coated on described steel conductor outer surface, the second sub-sheath is coated on described the first inner restrictive coating outer surface, and the 3rd sub-sheath is coated on described the second inner restrictive coating outer surface;

Some plain conductors alternately, this plain conductor one end is wound in described steel conductive surface, and the plain conductor other end connects muscle section, the 3rd through the described first sub-sheath, first successively and connects muscle section and the 3rd sub-sheath and be electrically connected to described proof copper-wire braided screen;

The right pitch of described the first twisted wire is 15～15.5mm, and the right pitch of described the second twisted wire is 13.5～13.9mm, and the right pitch of described the 3rd twisted wire is 14.2～14.6mm, and the right pitch of described the 4th twisted wire is 12.7～13.1mm;

Adjacent segments apart from design formula is: $0.002<|\frac{1}{h1}-\frac{1}{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA00003006392700011.png,HDA00003006392700021.png"\; state="\{\{state\}\}">h</figure-callout>}2}|\&le;0.013,$

The pitch design of being separated by formula is: $0.001<|\frac{1}{h1}-\frac{1}{\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="HDA00003006392700011.png,HDA00003006392700021.png"\; state="\{\{state\}\}">h</figure-callout>}3}|\&le;0.011;$

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.

Further improve technical scheme in technique scheme as follows:

1, in such scheme, the right pitch of described the first twisted wire is 15.2mm, and the right pitch of described the second twisted wire is 13.7mm, and the right pitch of described the 3rd twisted wire is 14.4mm, and the right pitch of described the 4th twisted wire is 12.9mm.

2, in such scheme, described adjacent 2 plain conductors be spaced apart 2.4～3.7 times of conduction cable core twisting pitch.

3, in such scheme, described four twisted pair wire strands form the conduction cable core, and this conduction cable core twisting pitch is to pitch 7.7～9.8 times of the 4th twisted wire.

4,, in such scheme, described the first muscle section of company, second connects muscle section and the first adjacent angle of muscle section of company is 120 °.

5,, in such scheme, described steel conductor and copper conductor be annealed PROCESS FOR TREATMENT all.

6, in such scheme, described foil shielding layer is comprised of laminated polyester film and the aluminium foil layer that is positioned at its medial surface, and described polyester film layer thickness is 0.020 ± 0.002mm, and described aluminium foil layer thickness is 0.014 ± 0.002mm.

Because technique scheme is used, the utility model compared with prior art has following advantages:

1, the compound data cable of the utility model stretch-proof low-loss, both effectively solved the circumstance complication of cable in work progress, for example in the power supply-distribution system of machine room and the distribution system in building, the wiring of cable brings many inconvenience, can produce certain electromagnetic field around during the cable operation, thereby the interference other system, can cause the other problems such as equipment operation failure when serious; Avoided pulling cable, there is tensile strength and elongation preferably, both guaranteed to meet the self-supporting ability of cable, also solved the problem of cable phase mutual interference in running simultaneously, guaranteed the long-term stability of transmission characteristic, but there is again the advantages such as the convenient Reusability of emergency maintenance, there is obvious economic benefit and promotional value, the test of material rising-heat contracting-cold in the time of standing variation of ambient temperature, therefore can extend the useful life of cable, be difficult for being corroded, long service life.

2, the compound data cable of the utility model stretch-proof low-loss, broken through traditional strand to line after the circular configuration of stranding, effectively improve the surplus of communication cable cross-talk (NEXT, FEXT) index 1%, even also improved the 1dB surplus of loss (INSERTION LOSS), increase by 1.5% stability of characteristic impedance (IMPEDANCE), when guaranteeing the stable transmission performance of cable, increased the performance of the transmission electricity of copper cable simultaneously.

3, the compound data cable of the utility model stretch-proof low-loss, adopt specific strand to become core pitch and strand to combine line to string pitch collocation and the cable core that specifically conducts electricity, reduced transmission of electric signals and produced the electromagnetic induction impact on its loop, greatly reduce the cross-talk of the communications cable, the electric field that wherein capacitive sensing produces has both positive and negative polarity, after adjacent two induction field stacks, can cancel each other, reduce mutual capacitively coupled, take into account other electric parameter simultaneously, also avoided signal of telecommunication delay inequality to increase.

4, the compound data cable of the utility model stretch-proof low-loss, it comprises some plain conductors alternately, this plain conductor one end is wound in described steel conductive surface, the plain conductor other end connects muscle section, the 3rd through the described first sub-sheath, first successively and connects muscle section and the 3rd sub-sheath and be electrically connected to described proof copper-wire braided screen, reduce cross-talk and the signal of telecommunication delay inequality of the communications cable, avoid power loss and the signal reflex of signal to return transmission source, improved the stability of signal power and performance; Secondly, it comprises some plain conductors alternately, this plain conductor one end is wound in described steel conductive surface, the plain conductor other end connects muscle section, the 3rd through the described first sub-sheath, first successively and connects muscle section and the 3rd sub-sheath and be electrically connected to described proof copper-wire braided screen, and described adjacent 2 plain conductors be spaced apart 2.4～3.7 times of conduction cable core twisting pitch, further reduce cross-talk and the signal of telecommunication delay inequality of the communications cable, and avoided the power loss of signal, improved the stability of signal power and performance.

The accompanying drawing explanation

Accompanying drawing 1 is the compound data cable structural representation one of the utility model stretch-proof low-loss;

Accompanying drawing 2 is the compound data cable structural representation two of the utility model stretch-proof low-loss.

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, conduction 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 section; 122, second connects muscle section; 123, the 3rd connects muscle section; 13, plain conductor; 14, proof copper-wire braided screen; 15, the second wire sheathing.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further described:

Embodiment 1: the compound data cable of a kind of stretch-proof low-loss comprises: steel conductor 1, coaxial conductor 2, eight copper conductor 3 and oversheath bodies 4 that are coated with polyethylene layer 31; Described coaxial conductor 2 outer surfaces are coated with plastic insulating layer 5, and these plastic insulating layer 5 outer surfaces are coated with the first wire sheathing 6, the first inner restrictive coatings 7 and are coated on described the first wire sheathing 6 outer surfaces;

Described eight copper conductors 3 are four pairs of twisted wires pair as information communication of stranded formation in twos, described four twisted pair wire centering the first twisted wires are arranged in order 84 the 83 and the 4th twisted wire the 82, the 3rd twisted wire and stranded formation conduction cable core 8 counterclockwise to the 81, second twisted wire, the first twisted wire to the 81 and the 3rd twisted wire to the 83 and second twisted wire to the 82 and the 4th twisted wire to 84 alternately, described four twisted pair wires all are coated with foil shielding layer 9 to outer surface separately, one polyester belt 10 is wrapped in described foil shielding layer 9 outer surfaces, and the second inner restrictive coating 11 is coated on described polyester belt 10 outer surfaces;

Described oversheath body 4 comprises the first sub-sheath 41, the second sub-sheath 42 and the 3rd sub-sheath 43, this first sub-sheath 41, the second sub-sheath 42 and the 3rd sub-sheath 43 centers have one " people " font connecting portion 12, first of this " people " font connecting portion 12 connects muscle section 121, the second muscle section 122 of company and the 3rd connects muscle section 123 and is connected respectively to the described first sub-sheath 41, the second sub-sheath 42 and the 3rd sub-sheath 43, the first sub-sheath 41 is coated on described steel conductor 1 outer surface, the second sub-sheath 42 is coated on described the first inner restrictive coating 7 outer surfaces, the 3rd sub-sheath 43 is coated on described the second inner restrictive coating 11 outer surfaces,

Be provided with proof copper-wire braided screen 14 between the described the 3rd sub-sheath 43 and the first inner restrictive coating 11, both can not increase external diameter, can guarantee again the tractive effort needed, thereby guaranteed the adhesive between the 3rd sub-sheath 43 and the first inner restrictive coating 11, played humidification, there is very large tensile strength, also can eliminate or reduce the stress of cable when mobile or twisting states, the useful life of improving cable; Secondly, further strengthened interference free performance.

Some plain conductors 13 alternately, these plain conductor 13 1 ends are wound in described steel conductor 1 surface, and plain conductor 13 other ends connect muscle section 121, the 3rd through the described first sub-sheath 41, first successively and connect muscle section 123 and the 3rd sub-sheath 43 and be electrically connected to described proof copper-wire braided screen 14; Described adjacent 2 plain conductors 13 be spaced apart 2.4～3.7 times of conduction cable core 8 twisting pitch;

Described the first twisted wire is 15～15.5mm to 81 pitch, and described the second twisted wire is 13.5～13.9mm to 82 pitch, and described the 3rd twisted wire is 14.2～14.6mm to 83 pitch, and described the 4th twisted wire is 12.7～13.1mm to 84 pitch;

Adjacent segments apart from design formula is: $0.002<|\frac{1}{h1}-\frac{1}{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA00003006392700011.png,HDA00003006392700021.png"\; state="\{\{state\}\}">h</figure-callout>}2}|\&le;0.013,$

The pitch design of being separated by formula is: $0.001<|\frac{1}{h1}-\frac{1}{\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="HDA00003006392700011.png,HDA00003006392700021.png"\; state="\{\{state\}\}">h</figure-callout>}3}|\&le;0.011;$

H1 is the first twisted wire to 81 pitch, and h2 is the second twisted wire to the 82 or the 4th twisted wire to 84 pitch, and h3 is the 3rd twisted wire to 83 pitch.

Described the first twisted wire is 15.2mm to 81 pitch, and described the second twisted wire is 13.7mm to 82 pitch, and described the 3rd twisted wire is 14.4mm to 83 pitch, and described the 4th twisted wire is 12.9mm to 84 pitch.

Above-mentioned four twisted pair wire strands form conduction cable core 8, and these conduction cable core 8 twisting pitch are to 84 pitches 9.8 times of the 4th twisted wire.

Above-mentioned foil shielding layer 9 is comprised of laminated polyester film and the aluminium foil layer that is positioned at its medial surface, and described polyester film layer thickness is 0.020 ± 0.002mm, and described aluminium foil layer thickness is 0.014 ± 0.002mm; Above-mentioned the first muscle section of company, second connects muscle section and the first adjacent angle of muscle section of company is 120 °; Above-mentioned steel conductor 1 and copper conductor 3 be annealed PROCESS FOR TREATMENT all.

Embodiment 2: the compound data cable of a kind of stretch-proof low-loss comprises: steel conductor 1, coaxial conductor 2, eight copper conductor 3 and oversheath bodies 4 that are coated with polyethylene layer 31; Described coaxial conductor 2 outer surfaces are coated with plastic insulating layer 5, and these plastic insulating layer 5 outer surfaces are coated with the first wire sheathing 6, the first inner restrictive coatings 7 and are coated on described the first wire sheathing 6 outer surfaces; Be provided with one second wire sheathing 15 between described the first inner restrictive coating 7 and the second sub-sheath 42, thereby be conducive to further reduce mutual coupling, improved signal transmission quality;

Described eight copper conductors 3 are four pairs of twisted wires pair as information communication of stranded formation in twos, described four twisted pair wire centering the first twisted wires are arranged in order 84 the 83 and the 4th twisted wire the 82, the 3rd twisted wire and stranded formation conduction cable core 8 counterclockwise to the 81, second twisted wire, the first twisted wire to the 81 and the 3rd twisted wire to the 83 and second twisted wire to the 82 and the 4th twisted wire to 84 alternately, described four twisted pair wires all are coated with foil shielding layer 9 to outer surface separately, one polyester belt 10 is wrapped in described foil shielding layer 9 outer surfaces, and the second inner restrictive coating 11 is coated on described polyester belt 10 outer surfaces;

Described oversheath body 4 comprises the first sub-sheath 41, the second sub-sheath 42 and the 3rd sub-sheath 43, this first sub-sheath 41, the second sub-sheath 42 and the 3rd sub-sheath 43 centers have one " people " font connecting portion 12, first of this " people " font connecting portion 12 connects muscle section 121, the second muscle section 122 of company and the 3rd connects muscle section 123 and is connected respectively to the described first sub-sheath 41, the second sub-sheath 42 and the 3rd sub-sheath 43, the first sub-sheath 41 is coated on described steel conductor 1 outer surface, the second sub-sheath 42 is coated on described the first inner restrictive coating 7 outer surfaces, the 3rd sub-sheath 43 is coated on described the second inner restrictive coating 11 outer surfaces,

Be provided with proof copper-wire braided screen 14 between the described the 3rd sub-sheath 43 and the first inner restrictive coating 11, both can not increase external diameter, can guarantee again the tractive effort needed, thereby guaranteed the adhesive between the 3rd sub-sheath 43 and the first inner restrictive coating 11, played humidification, there is very large tensile strength, also can eliminate or reduce the stress of cable when mobile or twisting states, the useful life of improving cable; Secondly, further strengthened interference free performance.

Some plain conductors 1 alternately, these plain conductor 13 1 ends are wound in described steel conductor 1 surface, and plain conductor 13 other ends connect muscle section 121, the 3rd through the described first sub-sheath 41, first successively and connect muscle section 123 and the 3rd sub-sheath 43 and be electrically connected to described proof copper-wire braided screen 14; Described adjacent 2 plain conductors 13 be spaced apart 2.4～3.7 times of conduction cable core 8 twisting pitch;

Described the first twisted wire is 15.1mm to 81 pitch, and described the second twisted wire is 13.5mm to 82 pitch, and described the 3rd twisted wire is 14.3mm to 83 pitch, and described the 4th twisted wire is 12.8mm to 84 pitch;

Adjacent segments apart from design formula is: $0.002<|\frac{1}{h1}-\frac{1}{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA00003006392700011.png,HDA00003006392700021.png"\; state="\{\{state\}\}">h</figure-callout>}2}|\&le;0.013,$

The pitch design of being separated by formula is: $0.001<|\frac{1}{h1}-\frac{1}{\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="HDA00003006392700011.png,HDA00003006392700021.png"\; state="\{\{state\}\}">h</figure-callout>}3}|\&le;0.011;$

H1 is the first twisted wire to 81 pitch, and h2 is the second twisted wire to the 82 or the 4th twisted wire to 84 pitch, and h3 is the 3rd twisted wire to 83 pitch.

Above-mentioned four twisted pair wire strands form conduction cable core 8, and these conduction cable core 8 twisting pitch are to 84 pitches 7.7 times of the 4th twisted wire.

Foregoing is further described below.

The design of aluminum foil material

According to telecommunication cable standard and requirement, shielding is comprised of one deck single face clad aluminum foil and a drain wire, and the single face clad aluminum foil requires to refer to following table:

The specification requirement of single face 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, allows unidirectional sub-thread broken string length to be not more than 150mm, and trimmed is answered in the broken string termination

The main performance index of finished cable

Conductor DC resistance (20 ℃) :≤96 Ω/km;

The characteristic impedance of paired cable (20 ℃): 100 ± 15 Ω;

The characteristic impedance of coaxial cable (20 ℃): 75 ± 15 Ω;

The insulation resistance of cable: >=10000M Ω km.

Above-described embodiment is only explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection range of the present utility model.

Claims (7)

1. the compound data cable of stretch-proof low-loss, is characterized in that: comprising: steel conductor (1), coaxial conductor (2), eight copper conductor (3) and oversheath bodies (4) that are 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 the first wire sheathing (6) outer surface;

Described eight copper conductors (3) are four pairs of twisted wires pair as information communication of stranded formation in twos, described four twisted pair wire centering the first twisted wires are to (81), the second twisted wire is to (82), the 3rd twisted wire is to (83) and the 4th twisted wire is arranged in order counterclockwise to (84) and stranded formation conduction cable core (8), the 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 all are coated with foil shielding layer (9) to outer surface separately, one polyester belt (10) is wrapped in described foil shielding layer (9) outer surface, 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), the second sub-sheath (42) and the 3rd sub-sheath (43), this first sub-sheath (41), the 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 section (121), the second muscle section (122) of company and the 3rd connects muscle section (123) and is connected respectively to the described first sub-sheath (41), the second sub-sheath (42) and the 3rd sub-sheath (43), the first sub-sheath (41) is coated on described steel conductor (1) outer surface, the second sub-sheath (42) is coated on described the first inner restrictive coating (7) outer surface, the 3rd sub-sheath (43) is coated on described the second inner restrictive coating (11) outer surface,

Some plain conductors (13) alternately, these plain conductor (13) one ends are wound in described steel conductor (1) surface, and plain conductor (13) other end connects muscle section (121), the 3rd through the described first sub-sheath (41), first successively and connects muscle section (123) and the 3rd sub-sheath (43) and be electrically connected to a proof copper-wire braided screen (14);

Described the first twisted wire is 15～15.5mm to the pitch of (81), described the second twisted wire is 13.5～13.9mm to the pitch of (82), described the 3rd twisted wire is 14.2～14.6mm to the pitch of (83), and described the 4th twisted wire is 12.7～13.1mm to the pitch of (84);

Adjacent segments apart from design formula is:

The pitch design of being separated by formula is:

H1 is the pitch of the first twisted wire to (81), the h2 pitch to (84) that is the second twisted wire to (82) or the 4th twisted wire, and h3 is the pitch of the 3rd twisted wire to (83).

2. the compound data cable of stretch-proof low-loss according to claim 1, it is characterized in that: described the first twisted wire is 15.2mm to the pitch of (81), described the second twisted wire is 13.7mm to the pitch of (82), described the 3rd twisted wire is 14.4mm to the pitch of (83), and described the 4th twisted wire is 12.9mm to the pitch of (84).

3. the compound data cable of stretch-proof low-loss according to claim 1 is characterized in that: described adjacent 2 plain conductors (13) be spaced apart 2.4～3.7 times of conduction cable core (8) twisting pitch.

4. the compound data cable of stretch-proof low-loss according to claim 1 is characterized in that: described four twisted pair wire strands form conduction cable core (8), and this conduction cable core (8) twisting pitch is to (84) 7.7～9.8 times of the 4th twisted wire.

5. according to the compound data cable of the described stretch-proof low-loss of any one in claim 1～3, it is characterized in that: described foil shielding layer (9) is comprised of laminated polyester film and the aluminium foil layer that is positioned at its medial surface, described polyester film layer thickness is 0.020 ± 0.002mm, and described aluminium foil layer thickness is 0.014 ± 0.002mm.

6. according to the compound data cable of the described stretch-proof low-loss of any one in claim 1～3, it is characterized in that: described the first muscle section of company, second connects muscle section and the first adjacent angle of muscle section of company is 120 °.

7. according to the compound data cable of the described stretch-proof low-loss of any one in claim 1～3, it is characterized in that: described steel conductor (1) and copper conductor (3) be annealed PROCESS FOR TREATMENT all.

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