CN107833660A - A kind of guide cable - Google Patents
A kind of guide cable Download PDFInfo
- Publication number
- CN107833660A CN107833660A CN201710652785.4A CN201710652785A CN107833660A CN 107833660 A CN107833660 A CN 107833660A CN 201710652785 A CN201710652785 A CN 201710652785A CN 107833660 A CN107833660 A CN 107833660A
- Authority
- CN
- China
- Prior art keywords
- outside
- pair twist
- cable
- coated
- guide cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
-
- 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
-
- 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
- H01B7/22—Metal wires or tapes, e.g. made of steel
Landscapes
- Insulated Conductors (AREA)
Abstract
A kind of guide cable, including multiple pair twist units, interior PET strip is coated with the outside of the multiple pair twist unit, factice for filling is filled between pair twist unit and interior PET strip, LLDPE inner sheaths are provided with the outside of PET strip, outer PET strip is coated with the outside of metal screen layer, oversheath is provided with the outside of outer PET strip；The pair twist unit includes two twisted insulated wire cores, and the insulated wire cores include conductor and the polyethylene layer being coated on outside conductor, polypropylene bunching band is coated with two twisted insulated wire cores；The present invention provides a kind of guide cable, increase crosstalk attenuation, reduce capacity unmbalance, using a kind of nonmagnetic metal shielding construction, reduce the intrinsic screening factor of cable, to ensure cable core unit normal operation, signal stabilization transmission, while a kind of outer jacket structure is designed to ensure cable in the guide cable being worn, cable termite resistance will not can reduce under rupture event.
Description
Technical field
The present invention relates to field of cable technology, particularly a kind of guide cable.
Background technology
It is monitoring circuit running situation, master control room understands circuit operation conditions at any time, along height when ultra-high-tension power transmission line is laid
The pressure transmission line guide cable of buried-pipe laying nearby, guide cable each pair core are responsible for transmitting different signals, controlled different
Electric device act, when guide cable crosstalk attenuation is bigger, pair-to-pair capacity it is uneven it is smaller, intrinsic screening factor value is lower
When, better to electromagnetic field effect caused by shielding high-tension cable, transmission signal is more stable.To avoid interfering between signal, need
Using special design structure, ensure the accurate of signal transmission.Therefore along the guiding of buried-pipe laying near ultra-high-tension power transmission line
Cable, it is impossible to use common control signal cable, tackle process pitch between conductor and outer insulation diameter, line pair and accurately control, protect
It is undistorted to demonstrate,prove signal, not interaction crosstalk, also need the nonmagnetic metal shielding construction being combined using copper wire and copper strips, reduce cable
Intrinsic screening factor, the ability of external electromagnetic field interference is shielded so as to strengthen cable in transmitting procedure, ensure monitoring and communication
Signal is interference-free, it is ensured that power distribution equipment normal work,
The guide cable surrounding environment of buried-pipe laying near along ultra-high-tension power transmission line is complicated, circuit length, and operation maintenance workload is big,
Especially to some termites area, need cable that there is good termite resistance energy, therefore use three layers of difference on cable jacket
Sheath material composition, enable oversheath be worn, cable termite resistance will not reduce under rupture event.
Capacity unmbalance requirement is not more than 1000pF/500m between general instrument, control any line pair of cable（I.e. 1362
pF/750m）、250 pF/250m（That is 750 pF/750m）, instrument, control cable generally use copper strips, proof copper-wire braided metal screen
Shield structure, metallic shield resistance is bigger than normal, and when being used near 50Hz high-tension lines, intrinsic screening factor is higher.And termite-proof knot
Structure in polyolefin jacket material typically using adding termite-proof repellant, when sheath is worn, ruptures, termite resistance energy
It will substantially reduce.And the project cable is not less than for any pair of guide cable 16km above crosstalk attenuation under 1kHz
65dB, capacity unmbalance is not more than 200pF/750m between any line pair, and intrinsic screening factor is less than 0.3 during 50Hz, and outside
Sheath is worn, cable termite resistance will not can reduce under rupture event, the operation of relatively reliable monitoring ultra-high-tension power transmission line.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of guide cable, increase crosstalk attenuation, reduce electric capacity injustice
Weighing apparatus, using a kind of nonmagnetic metal shielding construction, the intrinsic screening factor of cable is reduced, to ensure that cable core unit is normally transported
Row, signal stabilization transmission, at the same design a kind of outer jacket structure with ensure cable be worn, cable is anti-white under rupture event
The guide cable that ant performance will not reduce.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of guide cable, including multiple pair twists
Unit, interior PET strip is coated with the outside of the multiple pair twist unit, filled with filling oil between pair twist unit and interior PET strip
Cream, LLDPE inner sheaths are provided with the outside of PET strip, metal screen layer are provided with the outside of LLDPE inner sheaths, in metallic shield
The outside of layer is coated with outer PET strip, and oversheath is provided with the outside of outer PET strip；
The pair twist unit includes two twisted insulated wire cores, and the insulated wire cores include conductor and are coated on poly- outside conductor
Ethene insulating barrier, polypropylene bunching band is coated with two twisted insulated wire cores；The twisted section of the adjacent pair twist unit
Away from differing.
Preferably, the oversheath includes LLDPE oversheaths, nylon 12 and MDPE sheaths successively from the inside to the outside.
Preferably, the metal screen layer includes copper wire and copper strips successively from the inside to the outside.
Preferably, the number of the pair twist unit is 20.
Preferably, the number of the pair twist unit is 25.
Preferably, the number of the pair twist unit is 50.
The present invention provides a kind of guide cable, has advantages below：
1st, adjacent pair twist unit uses different pair twist pitches, ensures that any pair of guide cable 16km above cross-talk declines under 1kHZ
Subtract and be not less than 65dB, mutual capacitance is not more than 60nF/km, and capacity unmbalance is not more than 200pF/750m between line pair, and decay is not
More than 0.77dB/km.In 1kHz, 20P actual tests value is：Capacity unmbalance 53pF/ between electric capacity 37nF/km, line pair
750m, 0.65 dB/km of decay.
2nd, inner sheath peripheral hardware copper wire is dredged is around the wrapped nonmagnetic metal screen layer of, copper strips：By designing appropriate copper
Silk section, reduce the resistance of guide cable metallic shield, it is ensured that when guide cable is laid near 50Hz high-voltage power lines, shielding
Coefficient meets the design requirement that intrinsic screening factor is less than 0.3 at 50 hz, it is ensured that signal of communication is interference-free.
3rd, oversheath is using MDPE sheaths, nylon 12, LLDPE jacket structures：Using the Buddhist nun of termite-proof function admirable
Dragon 12, while may be scar is produced on nylon sheath wire the defects of, outside nylon sheath wire in view of cable pull in laid processes
Extrude one layer of anti abrasive MDPE protective layer, it is ensured that excellent termite-resisting function during use, especially suitable for Australia
Deng the more serious area of termite destruction electric power facility.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the structural representation of [w1] of the invention；
Fig. 2 is the structural representation of the embodiment of the present invention two；
Fig. 3 is the structural representation of the embodiment of the present invention three.
Embodiment
Embodiment one, as shown in figure 1, a kind of guide cable, including multiple pair twist units, the multiple pair twist unit it is outer
Side is coated with interior PET strip 5, is provided with LLDPE inner sheaths 6 in the outside of PET strip 5, metal is provided with the outside of LLDPE inner sheaths 6
Screen layer, outer PET strip 9 is coated with the outside of metal screen layer, oversheath is provided with the outside of outer PET strip 9；
The pair twist unit includes two twisted insulated wire cores, and the insulated wire cores include conductor 1 and are coated on outside conductor 1
Polyethylene layer 2, polypropylene bunching band 3 is coated with two twisted insulated wire cores；The strand of the adjacent pair twist unit
Pitch is closed to differ.
Preferably, the oversheath includes LLDPE oversheaths 10, nylon 12 and MDPE sheaths 12 successively from the inside to the outside.
Preferably, the metal screen layer includes copper wire 7 and copper strips 8 successively from the inside to the outside.
Preferably, the number of the pair twist unit is 20.
Embodiment two, as shown in Fig. 2 a kind of guide cable, including multiple pair twist units, the multiple pair twist unit it is outer
Side is coated with interior PET strip 5, and factice for filling 4 is filled between the pair twist unit and interior PET strip 5, is provided with the outside of PET strip 5
LLDPE inner sheaths 6, metal screen layer is provided with the outside of LLDPE inner sheaths 6, outer PET is coated with the outside of metal screen layer
Band 9, oversheath is provided with the outside of outer PET strip 9；
The pair twist unit includes two twisted insulated wire cores, and the insulated wire cores include conductor 1 and are coated on outside conductor 1
Polyethylene layer 2, polypropylene bunching band 3 is coated with two twisted insulated wire cores；The strand of the adjacent pair twist unit
Pitch is closed to differ.
Preferably, the oversheath includes LLDPE oversheaths 10, nylon 12 and MDPE sheaths 12 successively from the inside to the outside.
Preferably, the metal screen layer includes copper wire 7 and copper strips 8 successively from the inside to the outside.
Preferably, the number of the pair twist unit is 25.
Embodiment three, as shown in figure 3, a kind of guide cable, including multiple pair twist units, the multiple pair twist unit it is outer
Side is coated with interior PET strip 5, and factice for filling 4 is filled between the pair twist unit and interior PET strip 5, is provided with the outside of PET strip 5
LLDPE inner sheaths 6, metal screen layer is provided with the outside of LLDPE inner sheaths 6, outer PET is coated with the outside of metal screen layer
Band 9, oversheath is provided with the outside of outer PET strip 9；
The pair twist unit includes two twisted insulated wire cores, and the insulated wire cores include conductor 1 and are coated on outside conductor 1
Polyethylene layer 2, polypropylene bunching band 3 is coated with two twisted insulated wire cores；The strand of the adjacent pair twist unit
Pitch is closed to differ.
Preferably, the oversheath includes LLDPE oversheaths 10, nylon 12 and MDPE sheaths 12 successively from the inside to the outside.
Preferably, the metal screen layer includes copper wire 7 and copper strips 8 successively from the inside to the outside.
Preferably, the number of the pair twist unit is 50.
In the present invention, the core units of 20,25,50 pairs of transmission signals using adjacent lines to different pair twist pitches, jointly
Stranding dredged with copper wire around with the wrapped unit of copper strips in, realize cable at 1 khz more than any pair of guide cable 16km
Crosstalk attenuation is not less than 65dB, and capacity unmbalance is not more than 200pF/750m between any line pair, and intrinsic screening factor is less than 0.3
（50Hz）, it is ensured that signal stabilization transmission is interference-free, and oversheath is using MDPE sheaths 12, nylon 12,10 groups of LLDPE oversheaths
Into, enable cable jacket be worn, cable termite resistance will not reduce under rupture event, improve cable use range
And service life.
Compared with Traditional control and signal cable, the present invention is by each adjacent lines to using different pair twist pitch, non magnetic
Structure that metallic shield is combined using copper wire and copper strips, oversheath apply to the construction of cable using three layers of different sheath material
In have the advantage that：
1st, realizing reduces the intrinsic screening factor of cable：Dredged using copper wire around the wrapped nonmagnetic metal screen layer of, copper strips, Gu
There is screening factor to be less than 0.3（50Hz）, any pair of guide cable 16km above crosstalk attenuation is not less than 65dB under 1kHz, effectively
Electromagnetic field around ground shielding, it is ensured that signal stabilization transmits.
2nd, capacity unmbalance control is also contemplated within 200pF/750m, primarily to ensuring the decay of guide cable
Constant, phase-shift constant and wave impedance meet requirement, significantly reduce the signal interference between transmitting procedure center line pair.
3rd, termite-proof to use nylon 12 and be arranged at oversheath intermediate layer, meeting cable has termite-resisting function, and protects
Protected termite-proof layer, enable cable jacket be worn, cable termite resistance will not reduce under rupture event.
4th, only once mounting is needed to lay, you can to ensure the stability of line signal transmission to greatest extent, save tradition
Control and time and the expense of signal cable later maintenance and replacing, effectively reduce every cost.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the limitation for the present invention, this hair
Technical characteristic in the technical scheme that bright protection domain should be recorded with claim, including the technical scheme of claim record
Equivalents are protection domain.Equivalent substitution i.e. within this range is improved, also within protection scope of the present invention.
Claims (7)
- A kind of 1. guide cable, it is characterised in that：Including multiple pair twist units, it is coated with the outside of the multiple pair twist unit interior PET strip（5）, in PET strip（5）Outside be provided with LLDPE inner sheaths（6）, in LLDPE inner sheaths（6）Outside be provided with metal screen Layer is covered, outer PET strip is coated with the outside of metal screen layer（9）, in outer PET strip（9）Outside be provided with oversheath；The pair twist unit includes two twisted insulated wire cores, and the insulated wire cores include conductor（1）And it is coated on conductor（1） Outer polyethylene layer（2）, polypropylene bunching band is coated with two twisted insulated wire cores（3）；The adjacent pair twist The twisting pitch of unit differs.
- A kind of 2. guide cable according to claim 1, it is characterised in that：The oversheath includes successively from the inside to the outside LLDPE oversheaths（10）, nylon 12（11）And MDPE sheaths（12）.
- A kind of 3. guide cable according to claim 1, it is characterised in that：The metal screen layer includes successively from the inside to the outside Copper wire（7）And copper strips（8）.
- A kind of 4. guide cable according to claim 1, it is characterised in that：The number of the pair twist unit is 20.
- A kind of 5. guide cable according to claim 1, it is characterised in that：The number of the pair twist unit is 25.
- A kind of 6. guide cable according to claim 1, it is characterised in that：The number of the pair twist unit is 50.
- 7. according to a kind of guide cable of claim 5 or 6, it is characterised in that：The pair twist unit and interior PET strip（5）It Between be filled with factice for filling（4）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652785.4A CN107833660A (en) | 2017-08-02 | 2017-08-02 | A kind of guide cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652785.4A CN107833660A (en) | 2017-08-02 | 2017-08-02 | A kind of guide cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107833660A true CN107833660A (en) | 2018-03-23 |
Family
ID=61643191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710652785.4A Pending CN107833660A (en) | 2017-08-02 | 2017-08-02 | A kind of guide cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107833660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110070964A (en) * | 2019-04-26 | 2019-07-30 | 南安市全胤机械科技有限公司 | A kind of power cable of the crosstalk than reinforcing of decaying with pair twist functional characteristic impedance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002029496A1 (en) * | 2000-10-03 | 2002-04-11 | Enthone, Inc. | Resist stripping process |
| CN204045252U (en) * | 2014-09-17 | 2014-12-24 | 江西南缆集团有限公司 | A kind of frequency-changing cable |
| CN205722953U (en) * | 2016-04-28 | 2016-11-23 | 上海起帆电线电缆有限公司 | The termite-proof water-tree-resistantmedium medium voltage power cable that blocks water of environment-friendly type |
| CN106531301A (en) * | 2016-12-27 | 2017-03-22 | 乐星红旗电缆（湖北）有限公司 | Communication monitoring cable |
| CN207587402U (en) * | 2017-08-02 | 2018-07-06 | 乐星红旗电缆（湖北）有限公司 | A kind of guide cable |
-
2017
- 2017-08-02 CN CN201710652785.4A patent/CN107833660A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002029496A1 (en) * | 2000-10-03 | 2002-04-11 | Enthone, Inc. | Resist stripping process |
| CN204045252U (en) * | 2014-09-17 | 2014-12-24 | 江西南缆集团有限公司 | A kind of frequency-changing cable |
| CN205722953U (en) * | 2016-04-28 | 2016-11-23 | 上海起帆电线电缆有限公司 | The termite-proof water-tree-resistantmedium medium voltage power cable that blocks water of environment-friendly type |
| CN106531301A (en) * | 2016-12-27 | 2017-03-22 | 乐星红旗电缆（湖北）有限公司 | Communication monitoring cable |
| CN207587402U (en) * | 2017-08-02 | 2018-07-06 | 乐星红旗电缆（湖北）有限公司 | A kind of guide cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110070964A (en) * | 2019-04-26 | 2019-07-30 | 南安市全胤机械科技有限公司 | A kind of power cable of the crosstalk than reinforcing of decaying with pair twist functional characteristic impedance |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |