CN207587402U - A kind of guide cable - Google Patents
A kind of guide cable Download PDFInfo
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- CN207587402U CN207587402U CN201720956088.3U CN201720956088U CN207587402U CN 207587402 U CN207587402 U CN 207587402U CN 201720956088 U CN201720956088 U CN 201720956088U CN 207587402 U CN207587402 U CN 207587402U
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- pair twist
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- guide cable
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Abstract
A kind of guide cable, including multiple pair twist units, interior PET strip is coated on 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 equipped in the outside of PET strip, metal screen layer is equipped in the outside of LLDPE inner sheaths, outer PET strip is coated on the outside of metal screen layer, oversheath is equipped in 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 in two twisted insulated wire cores；The utility model 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 can will not reduce under rupture event.
Description
Technical field
The utility model is related to field of cable technology, particularly a kind of guide cable.
Background technology
It is monitoring circuit operating condition, 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, each pair of core of guide cable are responsible for transmitting different signals, be 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, the electromagnetic field effect generated to shielding high-tension cable is better, and transmission signal is more stable.To avoid interfering with each other 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, cope with 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 shields the ability of external electromagnetic field interference so as to enhance cable in transmission process, ensures monitoring and communication
Signal is interference-free, it is ensured that and power distribution equipment works normally,
The guide cable ambient enviroment of buried-pipe laying near along ultra-high-tension power transmission line is complicated, circuit is long, operation and maintenance
Amount is big, especially to some termites area, cable is needed to have good termite resistance energy, therefore use three layers on cable jacket
Different sheath material compositions, enable oversheath be worn, cable termite resistance will not reduce under rupture event.
Capacity unmbalance requirement is no more than 1000pF/500m between general instrument, the control arbitrary 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 generally using adding termite-proof repellant, when sheath is worn, ruptures, termite resistance energy
It will substantially reduce.And the project cable any pair of guide cable 16km more than crosstalk attenuation under for 1kHZ is not less than
65dB, capacity unmbalance is no more than 200pF/750m between arbitrary line pair, and intrinsic screening factor is less than 0.3, and outside during 50Hz
Sheath is worn, cable termite resistance can will not reduce under rupture event, the operation of relatively reliable monitoring ultra-high-tension power transmission line.
Invention content
The technical problem to be solved by the utility model is to provide a kind of guide cable, increase crosstalk attenuation reduces capacitance
Imbalance using a kind of nonmagnetic metal shielding construction, reduces the intrinsic screening factor of cable, to ensure that cable core unit is normal
Operation, signal stabilization transmission, while design a kind of outer jacket structure with ensure cable be worn, cable is prevented under rupture event
The guide cable that termite performance will not reduce.
In order to solve the above technical problems, technical solution is used by the utility model：A kind of guide cable, including multiple
Pair twist unit is coated with interior PET strip on the outside of the multiple pair twist unit, is filled out between pair twist unit and interior PET strip
Oil-filled cream, LLDPE inner sheaths are equipped in the outside of PET strip, metal screen layer are equipped in the outside of LLDPE inner sheaths, in metal
Outer PET strip is coated on the outside of shielded layer, oversheath is equipped in 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 outside conductor
Polyethylene layer, be coated with polypropylene bunching band in two twisted insulated wire cores；The strand of the adjacent pair twist unit
Pitch is closed to differ.
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 utility model provides a kind of guide cable, has the following advantages：
1st, adjacent pair twist unit uses different pair twist pitches, ensures that more than any pair of guide cable 16km goes here and there under 1kHZ
Not less than 65dB, mutual capacitance is not more than 60nF/km for sound attenuation, and capacity unmbalance declines no more than 200pF/750m between line pair
Subtract no more than 0.77dB/km.In 1kHz, 20P actual tests value is：Capacity unmbalance 53pF/ between capacitance 37nF/km, line pair
750m, 0.65 dB/km of attenuation.
2nd, inner sheath peripheral hardware copper wire is dredged is around the wrapped nonmagnetic metal shielded layer of, copper strips：By designing appropriate copper
Silk section reduces 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 generated 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
Wait the more serious area of termite destructions electric power facility.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples：
Fig. 1 is the structure diagram of the utility model embodiment one；
Fig. 2 is the structure diagram of the utility model embodiment two；
Fig. 3 is the structure diagram of the utility model embodiment three.
Specific embodiment
Embodiment one, as shown in Figure 1, a kind of guide cable, including multiple pair twist units, outside the multiple pair twist unit
Side is coated with interior PET strip 5, and LLDPE inner sheaths 6 are equipped in the outside of PET strip 5, and metal is equipped in the outside of LLDPE inner sheaths 6
Shielded layer is coated with outer PET strip 9 on the outside of metal screen layer, and oversheath is equipped in 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 conductor 1
Outer polyethylene layer 2 is coated with polypropylene bunching band 3 in two twisted insulated wire cores；The adjacent pair twist unit
Twisting pitch 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, outside the multiple pair twist unit
Side is coated with interior PET strip 5, filled with factice for filling 4 between the pair twist unit and interior PET strip 5, is equipped in the outside of PET strip 5
LLDPE inner sheaths 6 are equipped with metal screen layer in the outside of LLDPE inner sheaths 6, outer PET are coated on the outside of metal screen layer
Band 9 is equipped with oversheath in 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 conductor 1
Outer polyethylene layer 2 is coated with polypropylene bunching band 3 in two twisted insulated wire cores；The adjacent pair twist unit
Twisting pitch 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, outside the multiple pair twist unit
Side is coated with interior PET strip 5, filled with factice for filling 4 between the pair twist unit and interior PET strip 5, is equipped in the outside of PET strip 5
LLDPE inner sheaths 6 are equipped with metal screen layer in the outside of LLDPE inner sheaths 6, outer PET are coated on the outside of metal screen layer
Band 9 is equipped with oversheath in 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 conductor 1
Outer polyethylene layer 2 is coated with polypropylene bunching band 3 in two twisted insulated wire cores；The adjacent pair twist unit
Twisting pitch 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 utility model, the core units of 20,25,50 pairs of transmission signals using adjacent lines to different pair twist pitches,
Common stranding dredged with copper wire around with the wrapped unit of copper strips in, realize cable any pair of guide cable 16km under 1kHZ
More than crosstalk attenuation is not less than 65dB, and capacity unmbalance is not more than 200pF/750m between arbitrary line pair, and intrinsic screening factor is small
In 0.3（50Hz）, it is ensured that signal stabilization transmission is interference-free, and oversheath is using shield outside MDPE sheaths 12, nylon 12, LLDPE
Set 10 composition, enable cable jacket be worn, cable termite resistance will not reduce under rupture event, improving cable makes
With range and service life.
Compared with Traditional control and signal cable, the utility model is by each adjacent lines to using different pair twist pitch, non-
Magnetic metal shields the structure being combined using copper wire and copper strips, oversheath applies to cable using three layers of different sheath material
It is had the advantage that in structure：
1st, realizing reduces the intrinsic screening factor of cable：It is dredged using copper wire and is shielded around the wrapped nonmagnetic metal of, copper strips
Layer, intrinsic screening factor are less than 0.3（50Hz）, any pair of guide cable 16km more than crosstalk attenuation is not less than under 1kHZ
The electromagnetic field of 65dB, effectively shielding surrounding, it is ensured that signal stabilization transmits.
2nd, capacity unmbalance control is also contemplated within 200pF/750m, primarily to ensuring the attenuation of guide cable
Constant, phase-shift constant and wave impedance meet requirement, significantly reduce the signal interference between transmission process center line pair.
3rd, it is termite-proof to use nylon 12 and be set to oversheath middle layer, cable is met with termite-resisting function, and is protected
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 the maximum extent, save tradition
Control and the time and expense of signal cable later maintenance and replacement, effectively reduce every cost.
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model
System, the technical solution that the scope of protection of the utility model should be recorded with claim, the technical solution recorded including claim
The equivalents of middle technical characteristic are protection domain.Equivalent replacement i.e. within this range is improved, also in the utility model
Protection domain within.
Claims (7)
1. a kind of guide cable, it is characterised in that：Including multiple pair twist units, it is coated on the outside of the multiple pair twist unit interior
PET strip（5）, in PET strip（5）Outside be equipped with LLDPE inner sheaths（6）, in LLDPE inner sheaths（6）Outside be equipped with metal screen
Layer is covered, outer PET strip is coated on the outside of metal screen layer（9）, in outer PET strip（9）Outside be equipped 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 in two twisted insulated wire cores（3）；The adjacent pair twist
The twisting pitch of unit differs.
2. a kind of 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）.
3. a kind of 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）.
4. a kind of guide cable according to claim 1, it is characterised in that：The number of the pair twist unit is 20.
5. a kind of guide cable according to claim 1, it is characterised in that：The number of the pair twist unit is 25.
6. a kind of 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 |
|---|---|---|---|
| CN201720956088.3U CN207587402U (en) | 2017-08-02 | 2017-08-02 | A kind of guide cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720956088.3U CN207587402U (en) | 2017-08-02 | 2017-08-02 | A kind of guide cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207587402U true CN207587402U (en) | 2018-07-06 |
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ID=62718761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720956088.3U Active CN207587402U (en) | 2017-08-02 | 2017-08-02 | A kind of guide cable |
Country Status (1)
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| CN (1) | CN207587402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107833660A (en) * | 2017-08-02 | 2018-03-23 | 乐星红旗电缆（湖北）有限公司 | A kind of guide cable |
-
2017
- 2017-08-02 CN CN201720956088.3U patent/CN207587402U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107833660A (en) * | 2017-08-02 | 2018-03-23 | 乐星红旗电缆（湖北）有限公司 | A kind of guide cable |
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