CN208488577U - A kind of novel flame-retardant cracking resistance optical cable - Google Patents
A kind of novel flame-retardant cracking resistance optical cable Download PDFInfo
- Publication number
- CN208488577U CN208488577U CN201821103309.3U CN201821103309U CN208488577U CN 208488577 U CN208488577 U CN 208488577U CN 201821103309 U CN201821103309 U CN 201821103309U CN 208488577 U CN208488577 U CN 208488577U
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- optical cable
- nonmetallic
- retardant
- buffer layer
- cracking resistance
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Abstract
The utility model discloses a kind of novel flame-retardant cracking resistance optical cables, belong to fiber optic cable manufacture technical field, it includes at least cable core, and the outside of cable core is wrapped to be equipped with nonmetallic buffer layer, and nonmetallic buffer exteriors extrusion molding is equipped with oversheath.Nonmetallic buffer layer reduces cable core metal outer wall lap-joint's stress to the long term of oversheath, avoids optical cable in the case where upper disk is bent and is used for a long time between cable core and fire-retardant oversheath, the cracking of optical cable caused by cable core metal outer wall stress.The probability that is overlapped of the overlap edge of nonmetallic buffer layer and the overlap edge of metal compound belt can be effectively reduced by the way of wrapped in nonmetallic buffer layer, therefore come the generation that avoids cracking risk.
Description
Technical field
The utility model relates to fiber optic cable manufacture technical field, especially a kind of novel flame-retardant cracking resistance optical cable.
Background technique
Transmission medium of the optical cable as signal, is widely used in rail track.Railway is generallyd use fire-retardant outer with optical cable
Sheath guarantee optical cable flame retardant property, make optical cable in the case where accident is by fire flame not in optical cable vertical spread, and continue
Burning after a certain period of time can self-extinguish.But more Al is usually contained in flame-retardant sheath material used in fire-retardant cable
(OH)3Or Mg (OH)2Filler can reduce optical cable although filler can promote the flame retardant property of optical cable to a certain extent
Mechanical performance, cause the intensity of cable jacket to decline, the cracking that may cause optical cable used under long term outdoor environment.
Especially in the structure with metal tape armour, the damage by metal tape active force is easiest on the inside of oversheath,
If at this moment optical cable is wound up on the lesser optical cable take-up reel of bending radius, outer layer metal belt edge must be damaged in oversheath
Side makes crack occur on the inside of oversheath.At this point, optical cable is under long term outdoor environment, crackle be will be further increased, and eventually lead to light
The cracking of cable influences the transmission performance of optical cable；The mode of the buffer layer longitudinal wrap generallyd use in the prior art, the overlap joint of buffer layer
Side may be overlapped with the overlap edge of metal compound belt, and the cable outer sheath thickness that will cause lap-joint is smaller, increase cracking wind
Danger, also will affect the transmission performance and service life of optical cable.
Summary of the invention
Purpose of the utility model is to overcome the above-mentioned shortcomings and provide a kind of novel flame-retardant cracking resistance optical cables, and design is reasonable,
Structure novel, can reduce the risk of fire-retardant cable oversheath cracking, while improve the mechanical performance and flame retardant property of product, this
The BROAD SUMMARY of application is as follows:
1, increase a nonmetallic buffer layer in the outside of metal compound belt, to reduce the stress of metal compound belt lap-joint
To the coup injury of oversheath.
2, nonmetallic buffer layer is wrapped on metal composite band by the way of wrapped.
3, by the linkage of winding machine revolving speed and optical cable speed of production, guarantee between the wrapped each circle of nonmetallic buffer layer
Without overlap joint and gapless.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of novel flame-retardant cracking resistance optical cable, it
Including at least cable core, it is characterised in that: the outside of cable core is equipped with nonmetallic buffer layer, and nonmetallic buffer exteriors are equipped with outer shield
Set.
To be wrapped in outside cable core around packet mode, oversheath is arranged in nonmetallic the nonmetallic buffer layer in a manner of extrusion molding
Buffer exteriors.
The nonmetallic buffer layer is waterstop or non-woven fabrics, and oversheath is low-smoke halide-free fireproof composite polyolefine material.
The cable core includes center reinforcemen and several Loose tubes being wrapped in outside center reinforcemen, several
Several optical fiber are nested in Loose tube, wherein between the outer wall of several Loose tubes and the inner wall of nonmetallic buffer layer at least
It is provided with outer layer metal composite band.
Several described Loose tubes are wrapped in outside center reinforcemen with SZ stranded mode, are nested in Loose tube several
Root colored optical fiber, outer layer metal composite band are arranged in outside several Loose tubes in a manner of longitudinal wrap.
Inner layer metal composite band is additionally provided between the outer wall of several Loose tubes and the inner wall of nonmetallic buffer layer
And it is wrapped in the inner sheath outside inner layer metal composite band.
The inner layer metal composite band is arranged in outside several Loose tubes in a manner of longitudinal wrap, and inner sheath is in a manner of extrusion molding
It is wrapped in outside inner layer metal composite band, inner sheath is located inside outer layer metal composite band.
The outer layer metal composite band is wrapped in outside inner sheath in a manner of longitudinal wrap, and inner sheath is polythene material or low cigarette
Halogen-free anti-flaming polyolefin material.
Waterproofing compound, the center reinforcemen, several Loose tubes and outer layer gold are filled in the Loose tube
The gap filling belonged between composite band or inner layer metal composite band has waterproofing compound.
The center reinforcemen is phosphating steel wire or nonmetallic reinforced plastics bar, inner layer metal composite band and outer layer metal
Composite band is aluminium-plastic tape or composite steel-plastic belt.
The beneficial effects of the utility model are as follows:
1, nonmetallic buffer layer reduces metal compound belt lap-joint stress between metal compound belt and fire-retardant oversheath
To the long term of oversheath, avoid optical cable in the case where upper disk is bent and is used for a long time, optical cable caused by metal compound belt stress
Cracking.
2, in the application in such a way that nonmetallic buffer layer is wrapped, the overlap edge of nonmetallic buffer layer can be effectively reduced
With the probability that is overlapped of the overlap edge of metal compound belt, therefore come the generation that avoids cracking risk.
3, the linkage of winding machine revolving speed and speed of production can accurately guarantee not overlap between wrapping layer and gapless, protect
The thickness for demonstrate,proving buffer-layer surface is uniform, guarantees that oversheath thickness is uniform with this, reduces cracking risk.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will be needed below to being said in embodiment description
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings, in which:
Fig. 1 is single sheath overall structure diagram of the utility model.
Fig. 2 is double sheath overall structure diagrams of the utility model.
Fig. 3 is the structural schematic diagram of cable core in the utility model.
Fig. 4 is the wrapped schematic diagram of nonmetallic buffer layer in the utility model.
In figure: 1, center reinforcemen；2, Loose tube；3, optical fiber；4, outer layer metal composite band；5, nonmetallic buffer layer；6,
Oversheath；7, inner sheath；8, inner layer metal composite band；9, cable core；10, wrapped non-metallic；11, non-metallic gap；12, non-
Metal tape winding machine；13, winding machine rotation direction；14, the cable core direction of motion.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
A kind of novel flame-retardant cracking resistance optical cable, it includes at least cable core 9, it is characterised in that: the outside of cable core 9 is equipped with non-gold
Belong to buffer layer 5, is equipped with oversheath 6 outside nonmetallic buffer layer 5.
The utility model increases a nonmetallic buffer layer 5 in the metal outer wall of cable core 9, to reduce metal outer wall lap-joint
Stress to the coup injury of oversheath 6.Nonmetallic buffer layer 5 reduces metal outer wall between metal outer wall and oversheath 6
Lap-joint's stress avoids optical cable in the case where upper disk is bent and is used for a long time the long term of oversheath 6, and metal outer wall stress is made
At optical cable cracking.
Embodiment 2
As shown in Figure 1, Figure 3, it is to improve on the basis of embodiment 1, and the nonmetallic buffer layer 5 is around packet mode packet
It is rolled in outside cable core 9, oversheath 6 is arranged in outside nonmetallic buffer layer 5 in a manner of extrusion molding.
The nonmetallic buffer layer 5 is waterstop or non-woven fabrics, and oversheath 6 is low-smoke halide-free fireproof composite polyolefine material,
The material has good physical mechanical property and good flame retardant property, and elongation at break is high, and resistance to cracking can be good, processing
Performance is particularly excellent, and environmentally protective to meet Europe ROSH instruction, fire-retardant 6 material of oversheath is to guarantee that fiber optic cable flame retardant performance is qualified.
In process of production, nonmetallic buffer layer 5 uses waterstop or non-woven fabrics to wrap up around packet mode to the utility model
In the metal outer wall of cable core 9, by the linkage of winding machine revolving speed and optical cable speed of production, guarantee that nonmetallic buffer layer 5 is wrapped
Each circle between without overlap joint and gapless, guarantee that the thickness on nonmetallic 5 surface of buffer layer is uniform, oversheath 6 guaranteed with this
Thickness is uniform, reduces cracking risk；Waterstop or non-woven fabrics are existing mature technology products, can be very easy to buying in market
It arrives, waterstop or non-woven fabrics are not protection scope of the present invention, are not described in detail herein.
Embodiment 3
As shown in Figure 1, Figure 3, it is to improve on the basis of embodiment 1, the cable core 9 include center reinforcemen 1 with
And several Loose tubes 2 outside center reinforcemen 1 are wrapped in, several optical fiber 3 are nested in several Loose tubes 2,
In between the outer wall of several Loose tubes 2 and the inner wall of nonmetallic buffer layer 5 at least provided with outer layer metal composite band 4.
Several described Loose tubes 2 are wrapped in outside center reinforcemen 1 with SZ stranded mode, are nested in Loose tube 2
Several colored optical fibers 3, outer layer metal composite band 4 are arranged in outside several Loose tubes 2 in a manner of longitudinal wrap.
Nonmetallic buffer layer 5 is used and is wrapped in outside outer layer metal composite band 4 around packet mode, compound to reduce outer layer metal
Coup injury of the stress with 4 lap-joints to oversheath 6.By the linkage of winding machine revolving speed and optical cable speed of production, guarantee non-
Without overlap joint and gapless between the wrapped each circle of metal buffer layer 5, guarantee that the thickness on nonmetallic 5 surface of buffer layer is uniform, with
This is uniform to guarantee 6 thickness of oversheath, reduces cracking risk.Nonmetallic buffer layer 5 is located at outer layer metal composite band 4 and fire-retardant outer
Between sheath 6,4 lap-joint's stress of outer layer metal composite band is reduced to the long term of oversheath 6, optical cable is avoided to be bent in upper disk
And under being used for a long time, the cracking of optical cable caused by 4 stress of outer layer metal composite band.
Several Loose tubes 2 are wrapped in outside center reinforcemen 1, and it is compound that outer layer metal is equipped with outside several Loose tubes 2
Single jacket structure with 4 composition cable cores 9, the short-term maximum allowable pulling force of single jacket structure optical cable are 1500N, be usually used in it is aerial or
Pipeline laying has the characteristics that light weight.Center reinforcemen 1 uses phosphating steel wire or nonmetallic reinforced plastics bar, plays load
Effect, guarantee that the tensile property of optical cable meets design requirement.In addition, reinforcer and a certain number of optical fiber loose tubes are protected jointly
Demonstrate,prove the rounding of entire cable core structure.
Single mode or multimode fibre 3 are inserted in be covered in 2 pipes by the interior filling waterproofing compound pine that the plastics of high-modulus are made into.Cable core
9 center is a metal or metalloid core reinforcer 1, the group in such a way that SZ is twisted around center reinforcemen 1 of Loose tube 2
At compact and circular cable core 9, the gap in cable core 9 is filled with the compound that blocks water, and then uses 4 longitudinal tubing of metal compound belt
Afterwards, in one layer of low-smoke and halogen-free flame retardant polyolefin jacket 6 of outer layer extrusion molding, due to using plsitive mold extrusion molding, it is ensured that sheath with
Close contact between metal compound belt.
Embodiment 4
As shown in Fig. 2, it is improved on the basis of embodiment 3, the outer wall of several Loose tubes 2 and nonmetallic slow
Rush the inner sheath 7 for being additionally provided with inner layer metal composite band 8 between the inner wall of layer 5 and being wrapped in outside inner layer metal composite band 8.
The inner layer metal composite band 8 is arranged in outside several Loose tubes 2 in a manner of longitudinal wrap, and inner sheath 7 is with extrusion molding
Mode is wrapped in outside inner layer metal composite band 8, and inner sheath 7 is located inside outer layer metal composite band 4.
The outer layer metal composite band 4 is wrapped in outside inner sheath 7 in a manner of longitudinal wrap, inner sheath 7 be polythene material or
Low-smoke halide-free fireproof composite polyolefine material.
Waterproofing compound, the center reinforcemen 1, several Loose tubes 2 and outer layer are filled in the Loose tube 2
Gap filling between metal compound belt 4 or inner layer metal composite band 8 has waterproofing compound.
The center reinforcemen 1 is phosphating steel wire or nonmetallic reinforced plastics bar, and inner layer metal composite band 8 and outer layer are golden
Belonging to composite band 4 is aluminium-plastic tape or composite steel-plastic belt.
Several Loose tubes 2 are wrapped in outside center reinforcemen 1, and it is compound that inner layer metal is equipped with outside several Loose tubes 2
Band 8, inner sheath 7 are wrapped in outside inner layer metal composite band 8 in a manner of extrusion molding, and outer layer metal composite band 4 is wrapped up in a manner of longitudinal wrap
In 7 outer set of inner sheath at double jacket structures of cable core 9, aluminium-plastic tape or steel plastic compount is can be used in inner layer metal composite band 8
Band improves the lateral pressure resistant performance of optical cable, and the short-term maximum allowable pulling force of double jacket structure optical cables is 3000N, is usually used in direct-burried and applies
If good mechanical performance.Suitable for long distance communication, interoffice communication, it is particularly suitable for more demanding to moisture-proof, protection against rodents, ant proof etc.
Occasion.
For double jacket structures, single mode or multimode fibre 3 are inserted in the interior filling waterproof chemical combination being made by the plastics of high-modulus
In object Loose tube 2.The center of cable core 9 is a metal or metalloid core reinforcer 1, and Loose tube 2 is adopted around center reinforcemen 1
Compact and circular cable core 9 is formed with the mode that SZ is twisted, the gap in cable core 9 is filled with the compound that blocks water, then with internal layer gold
After belonging to 8 longitudinal tubing of composite band, extrusion molding layer of polyethylene or low smoke halogen-free flame-retardant polyolefin inner sheath 7, due to using squash type
Mold extrusion molding, it is ensured that the close contact between inner sheath 7 and inner layer metal composite band 8, then in the outside of inner sheath 7 longitudinal wrap again
One layer of outer layer metal composite band 4, in 4 outside of outer layer metal compound belt, using the wrapped one layer of nonmetallic buffering of the tension of 5~10N
Layer 5, then extrudes one layer of low smoke halogen-free flame-retardant polyolefin oversheath 6 again, due to using squash type extruded mould, it is ensured that outer shield
Close contact between set 6 and nonmetallic buffer layer 5.
The waterproofing compound filled in Loose tube 2 mainly uses optical fiber ointment, center reinforcemen 1,2 and of several Loose tubes
The waterproofing compound of gap filling between outer layer metal composite band 4 or inner layer metal composite band 8 mainly uses the cable cream that blocks water,
Wherein optical fiber ointment and the cable cream that blocks water are existing mature technology products, can be very easy to buying in market and arrive, optical fiber ointment and
The cable cream that blocks water is not protection scope of the present invention, is not described in detail herein.
Embodiment 5
As shown in Figure 1, Figure 2 and Figure 4, it is improved on the basis of embodiment 1, embodiment 4, has outer layer metal in longitudinal wrap
The outside of the cable core 9 of composite band 4 is carried out wrapped using non-metallic winding machine 12, and wrapped non-metallic 10 can be closely by cable
Core 9 wraps up.Winding machine rotation direction 13 and the cable core direction of motion 14 have codetermined the lapping direction of nonmetallic buffer layer 5.It is non-
The velocity of rotation of metal tape winding machine 12 and the movement velocity of cable core 9 have codetermined the size in non-metallic gap 11.Non- gold
It is the smaller the better to belong to band gap 11, but there can be no overlap joints.It will cause the uneven of 6 thickness of oversheath if any overlap joint.Non-metallic
The revolving speed of winding machine 12 is directly proportional to the movement velocity of cable core 9, for the relationship of linkage, (gives birth to when the movement velocity of cable core 9 is faster
When production speed is faster), the revolving speed of non-metallic winding machine 12 is faster, on the contrary then slower.By adjusting reasonable length velocity relation, protect
Wrapped 10 gap of non-metallic is demonstrate,proved to guarantee to stablize.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
For its relative importance of indication or suggestion or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.
It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
Claims (10)
1. a kind of novel flame-retardant cracking resistance optical cable, it includes at least cable core (9), it is characterised in that: the outside of cable core (9) is equipped with non-
Metal buffer layer (5), nonmetallic buffer layer (5) is external to be equipped with oversheath (6).
2. a kind of novel flame-retardant cracking resistance optical cable according to claim 1, it is characterised in that: the nonmetallic buffer layer
(5) to be wrapped in around packet mode, cable core (9) is external, and it is external that nonmetallic buffer layer (5) is arranged in oversheath (6) in a manner of extrusion molding.
3. a kind of novel flame-retardant cracking resistance optical cable according to claim 1 or 2, it is characterised in that: described is nonmetallic slow
Rushing layer (5) is waterstop or non-woven fabrics, and oversheath (6) is low-smoke halide-free fireproof composite polyolefine material.
4. a kind of novel flame-retardant cracking resistance optical cable according to claim 1, it is characterised in that: the cable core (9) includes
Center reinforcemen (1) and several external Loose tubes (2) of center reinforcemen (1) are wrapped in, in several Loose tubes (2)
Several optical fiber (3) are nested with, wherein between the outer wall of several Loose tubes (2) and the inner wall of nonmetallic buffer layer (5) at least
It is provided with outer layer metal composite band (4).
5. a kind of novel flame-retardant cracking resistance optical cable according to claim 4, it is characterised in that: several described Loose tubes
(2) center reinforcemen (1) outside is wrapped in SZ stranded mode, is nested with several colored optical fibers (3) in Loose tube (2),
It is external that several Loose tubes (2) are arranged in outer layer metal composite band (4) in a manner of longitudinal wrap.
6. a kind of novel flame-retardant cracking resistance optical cable according to claim 4 or 5, it is characterised in that: several described pine sets
It manages and is additionally provided with inner layer metal composite band (8) between the outer wall of (2) and the inner wall of nonmetallic buffer layer (5) and is wrapped in internal layer
The external inner sheath (7) of metal compound belt (8).
7. a kind of novel flame-retardant cracking resistance optical cable according to claim 6, it is characterised in that: the inner layer metal is compound
Several Loose tubes (2) outside is arranged in band (8) in a manner of longitudinal wrap, and it is multiple that inner sheath (7) is wrapped in inner layer metal in a manner of extrusion molding
Crossed belt (8) is external, and it is internal that inner sheath (7) is located at outer layer metal composite band (4).
8. a kind of novel flame-retardant cracking resistance optical cable according to claim 7, it is characterised in that: the outer layer metal composite band
(4) it is external that inner sheath (7) is wrapped in a manner of longitudinal wrap, inner sheath (7) is polythene material or low smoke halogen-free flame-retardant polyolefin material
Material.
9. a kind of novel flame-retardant cracking resistance optical cable according to claim 4 or 7, it is characterised in that: the Loose tube (2)
In be filled with waterproofing compound, the center reinforcemen (1), several Loose tubes (2) and outer layer metal composite band (4) or interior
Gap filling between layer metal compound belt (8) has waterproofing compound.
10. a kind of novel flame-retardant cracking resistance optical cable according to claim 9, it is characterised in that: the center reinforcemen
It (1) is phosphating steel wire or nonmetallic reinforced plastics bar, inner layer metal composite band (8) and outer layer metal composite band (4) are that plastic-aluminum is multiple
Crossed belt or composite steel-plastic belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821103309.3U CN208488577U (en) | 2018-07-12 | 2018-07-12 | A kind of novel flame-retardant cracking resistance optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821103309.3U CN208488577U (en) | 2018-07-12 | 2018-07-12 | A kind of novel flame-retardant cracking resistance optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208488577U true CN208488577U (en) | 2019-02-12 |
Family
ID=65246357
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821103309.3U Expired - Fee Related CN208488577U (en) | 2018-07-12 | 2018-07-12 | A kind of novel flame-retardant cracking resistance optical cable |
Country Status (1)
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| CN (1) | CN208488577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142206A (en) * | 2020-02-26 | 2020-05-12 | 西安西古光通信有限公司 | Optical cable water-blocking tape wrapping device and using method thereof |
-
2018
- 2018-07-12 CN CN201821103309.3U patent/CN208488577U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142206A (en) * | 2020-02-26 | 2020-05-12 | 西安西古光通信有限公司 | Optical cable water-blocking tape wrapping device and using method thereof |
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Granted publication date: 20190212 Termination date: 20210712 |