CN207976619U - A kind of flame-retardant optical cable - Google Patents

A kind of flame-retardant optical cable Download PDF

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Publication number
CN207976619U
CN207976619U CN201721301306.6U CN201721301306U CN207976619U CN 207976619 U CN207976619 U CN 207976619U CN 201721301306 U CN201721301306 U CN 201721301306U CN 207976619 U CN207976619 U CN 207976619U
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optical cable
flame
water blocking
retardant
armor
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CN201721301306.6U
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何建文
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SHENZHEN XIN'AOKE CABLE Co.,Ltd.
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SEI OPTICAL FIBER AND CABLE (SHENZHEN) CO Ltd
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Abstract

The utility model discloses a kind of flame-retardant optical cables, external sheath layer including armor, on the inside of the armor, the fire insulation water blocking layer on the inside of the external sheath layer, the inner restrictive coating on the inside of the fire insulation water blocking layer, the water blocking layer on the inside of the inner restrictive coating, fiber unit and center reinforcemen on the inside of the water blocking layer, multiple fiber units are arranged around the center reinforcemen, and the center reinforcemen is aramid fiber composite reinforcement.In the optical cable; the aramid fiber composite reinforcement that center reinforcemen has been made into be easy to flexibly be bent; not only meet optical cable special occasions installation requirement, but also have extraordinary flame-retardant characteristic, for the fiber unit under the state of catching fire can persistently use provide protection.In conclusion the optical cable can efficiently solve the problem of general flame-retardant optical cable flexibility not enough cannot be flexibly bent.

Description

A kind of flame-retardant optical cable
Technical field
The utility model is related to technical field of cables, more specifically to a kind of flame-retardant optical cable.
Background technology
It is more and more using the occasion of optical cable with becoming increasingly popular for Fibre Optical Communication Technology, it is related to public safety certain Occasion can require optical cable that there is high fire-retardance, high fire resisting and can flexibly be bent super soft simultaneously such as in subway tunnel Property.Under prior art conditions, it contradicts each other between this three requirements, it is therefore desirable to which this is solved using new technological means A little contradictions.
In order to solve the problems, such as the fire-retardant of optical cable, the measure generally taken at present is fire-retardant using low smoke and zero halogen PE (polyethylene) Expect to produce cable jacket layer, but since PE flame-proof materials itself are more stiff, and is easy production when cable bend radii is smaller Raw cracking, therefore when requiring optical cable that can flexibly be bent, general PE flame-proof materials will be no longer applicable in.
In order to solve the problems, such as the fire resisting of optical cable, the measure generally taken at present is the wrapped synthetic mica outside optical cable core Band simultaneously carries out armouring using steel band or steel wire simultaneously, and gap be easy to cause optical cable infiltration caused by wrapped synthetic mica tape, will Huge hidden danger is brought to the use of optical cable, and steel band or steel wire armor layer will make optical cable become very stiff, will make the curved of optical cable Song becomes extremely difficult, and huge obstacle has been manufactured in the normal use of certain occasions for optical cable.
Current layer-stranding cable is usually to reinforce using centered on phosphating steel wire or FRP (fiberglass reinforced plastics) The bending modulus of part, both materials is higher, is also adversely affected to the flexible bending of optical cable.
It is current art technology in conclusion how to efficiently solve the inadequate problem of flame-retardant optical cable flexibility The problem that personnel are faced.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of optical cable, which can efficiently solve fire-retardant resistance to The inadequate problem of flame cable flexibility.
In order to achieve the above object, the utility model provides the following technical solutions:
A kind of optical cable, including armor, the external sheath layer on the inside of the armor, be located at the external sheath layer on the inside of The refuge floor that blocks water, the inner restrictive coating on the inside of the refuge floor that blocks water, the water blocking layer on the inside of the inner restrictive coating, position Fiber unit on the inside of affiliated water blocking layer and center reinforcemen, multiple fiber units are set around the center reinforcemen It sets, the center reinforcemen is aramid fiber composite reinforcement.
Preferably, further include being located at the first water blocking yarn on the inside of the water blocking layer and being arranged between the fiber unit.
Preferably, the outer sheath of the external sheath layer is equipped with the first stainless steel corrugated flexible hose armor.
Preferably, the restrictive coating includes inner restrictive coating and external sheath layer, the inner restrictive coating and the external sheath layer it Between be provided with composite mica tape and block water refuge floor.
Preferably, the water blocking layer being made of waterstop, each fiber unit are provided on the inside of the inner restrictive coating On the inside of the water blocking layer.
Preferably, the inner restrictive coating and the external sheath layer are low-smoke non-halogen flame-retardant copolymer elastomer restrictive coating.
Preferably, further include being located at the poly- second of low smoke and zero halogen on the inside of the water blocking layer and being arranged between the fiber unit Alkene gasket for packing.
Preferably, the fiber unit includes PP (polypropylene) Loose tube, the optical fiber list on the inside of the PP Loose tubes Body and the second stainless steel corrugated flexible hose armor being set on the outside of the PP Loose tubes.
Preferably, the second water blocking yarn being filled between each optical fiber monomer is provided in the PP Loose tubes.
A kind of optical cable provided by the utility model, the specific optical cable includes armor, external sheath layer, the refuge floor that blocks water, Inner restrictive coating, water blocking layer and fiber unit and center reinforcemen.Wherein armor, external sheath layer, the refuge floor that blocks water, inner sheath Layer is located at the outside of fiber unit, mainly rises and protects to the destruction from fiber unit radial direction, and water blocking layer and center Reinforcer mainly plays protection to the destruction from fiber unit axial direction.Center reinforcemen especially therein, due to adopting It is aramid fiber composite reinforcement (KFRP), it not only has compared to phosphating steel wire and glass fibre reinforced composion (FRP) Preferably bending flexibility, and there is better flame-retardant characteristic, it can effectively avoid being blown under the state of catching fire, into And can continue to provide protection for fiber unit, have for flexibility, the flame-retardant characteristic of raising optical cable particularly critical Effect.
In order to further increase the flame-retardant characteristic of optical cable under the premise of keeping optical cable softness, wherein fiber unit by Second stainless steel corrugated flexible hose armor, PP Loose tubes and the multifiber monomer on the inside of Loose tube and water blocking yarn composition, Wherein the second armor and PP Loose tubes mainly play protection to the destruction from optical fiber monomer radial direction.Due to the second armouring Layer uses stainless steel corrugated flexible hose, therefore the stiffness index of optical cable will not be obviously increased while improving protective capability, therefore The softness of optical cable is maintained, and the second water blocking yarn mainly plays protection to the destruction from optical fiber monomer axial direction.
According to above-mentioned technical proposal it is recognised that in the application optical cable, since the center in optical cable is provided with virtue Synthetic fibre composite reinforcement, only optical cable provides effective booster action for it, and when optical cable is installed since it is more soft It can flexibly be bent, so greatly facilitating the installation of optical cable.In addition under the state of catching fire, because aramid fiber composite reinforcement has Good flame-retardant characteristic, can be effectively prevented from and blow, and then can continue to provide protection for fiber unit.
In conclusion by having made generic central reinforcer into aramid fiber composite reinforcement in the optical cable and having taken it His measure, not only improves the flexibility of optical cable, ensure that optical cable can be flexibly bent, meet optical cable special occasions peace Reload request, and improve the flame-retardant characteristic of optical cable.So that optical cable still is able to continue as optical fiber unit under the state of catching fire Protection is provided.Therefore, which can efficiently solve the problem of flame-retardant optical cable flexibility not enough cannot be flexibly bent.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described.It should be evident that the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram for the optical cable cross section that the utility model embodiment provides;
Fig. 2 is the structural schematic diagram for the fiber unit cross section that the utility model embodiment provides.
It is marked in attached drawing as follows:
First stainless steel corrugated flexible hose armor 1, external sheath layer 2, the refuge floor 3 that blocks water, inner restrictive coating 4, water blocking layer 5, light Fine unit 6, aramid fiber composite reinforcement 7, the first water blocking yarn 8, low smoke and zero halogen polyethylene gasket for packing 9;
Second stainless steel corrugated flexible hose armor 6-1;PP Loose tubes 6-2;Second water blocking yarn 6-3;Optical fiber monomer 6-4;.
Specific implementation mode
The utility model embodiment discloses a kind of optical cable, not enough cannot with efficiently solving flame-retardant optical cable flexibility Flexibly the problem of bending.
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 describe.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.
- Fig. 2 is please referred to Fig.1, Fig. 1 is the structural schematic diagram for the optical cable cross section that the utility model embodiment provides;Fig. 2 is The structural schematic diagram for the fiber unit cross section that the utility model embodiment provides.
In a specific embodiment, present embodiments provide a kind of optical cable, the specific optical cable include mainly restrictive coating, Fiber unit 3 and center reinforcemen.
Wherein restrictive coating mainly plays the role of outer layer protection, and above-mentioned fiber unit 6 and center reinforcemen 7 are respectively positioned on The inside of restrictive coating, to be protected by restrictive coating.Restrictive coating is generally low smoke and zero halogen PE flame-retardant layers, whole here for improving The pliability of body, so that there is optical cable higher bending property, preferably restrictive coating to be protected for low-smoke non-halogen flame-retardant copolymer elastomer Jacket layer.It should be noted that restrictive coating can be only one layer, inside and outside multilayer can also be separated into.Wherein low-smoke non-halogen flame-retardant Copolymer elastomer restrictive coating has the advantages that plastics and rubber simultaneously.
Wherein fiber unit 6 includes mainly that Loose tube and Duo Gen are located at the optical fiber monomer 6-4 on the inside of Loose tube, generally The effect of waterproof is played, ointment is filled between optical fiber monomer 6-4 in Loose tube, it is contemplated that ointment is inflammable Semi-fluid article can cause propagation of flame, and easy to produce smog in burning, and then largely effect on the fire-retardant and fire resisting of optical cable Characteristic.Based on this, the second water blocking yarn 6-3 is preferably set in Loose tube herein, the second water blocking yarn 6-3 is filled in each optical fiber Between monomer 6-4, and then factice for filling can not used.
Wherein center reinforcemen is located on the inside of restrictive coating, and multiple fiber units 6 are arranged around center reinforcemen, so that center Reinforcer generates protection to the flexible and bending of fiber unit 6, and then protects fiber unit 6.It is anti-in order to be played to fiber unit 6 Water conservation is at this time and fiber unit and center reinforcemen to be made to be respectively positioned in water blocking layer 5 by water blocking layer on the inside of restrictive coating Side.
Wherein center reinforcemen is aramid fiber composite reinforcement 7, aramid fiber composite reinforced material (KFRP) 7 compared to phosphating steel wire and Glass fibre reinforced composion (FRP) not only has better bent toughness, but also has better flame-retardant characteristic.It needs It is noted that the ingredient of specific aramid fiber composite reinforced material can refer to the prior art.Aramid fiber composite reinforcement 7 it is transversal Face is preferably circular, naturally it is also possible to be polygon.It should be noted that multiple fiber units 6 are arranged around center reinforcemen, Can be closely surrounded with same direction, can also be to be closely surrounded to cyclically-varying with left and right.
In the present embodiment, in the application optical cable, center reinforcemen is centrally-disposed, plays the role of reinforcement, When optical cable is bent, because of better softness, the installation of optical cable is greatly facilitated.And under the state of catching fire, because centered on Reinforcer has preferable flame-retardant characteristic, can be effectively prevented from and blow, and then can continue to protection fiber unit 6. In the optical cable, center reinforcemen is made into aramid fiber composite reinforcement 7, not only ensure that preferable bent toughness, but also have Extraordinary flame-retardant characteristic.So that it is smaller on the installation of optical cable influence, and can continue to protection light under the state of catching fire Fine unit 6.In conclusion the optical cable can efficiently solve the problem of optical cable flexibility not enough cannot be flexibly bent.
Further, can make to be provided with fiber unit 6 and center reinforcemen on the inside of restrictive coating.General fiber unit 6 Circular in cross-section, so can have certain gap between each fiber unit 6.At this time in order to preferably protecting light Fine unit 6, the first water blocking yarn 8 being preferably provided between each fiber unit 6 herein on the inside of restrictive coating.Fiber unit The first water blocking yarn 8 between 6 can not only play the role of blocking water to fiber unit 6, while can also be played to fiber unit 6 The effect of damping.Further, can also make to be filled with low smoke and zero halogen polyethylene gasket for packing 9 between each fiber unit 6, with drop The inflammable articles quantity of low cable interior.
Further, in order to more preferably protect optical cable, it is soft to be equipped with the first stainless steel ripple for the outer sheath of preferred restrictive coating herein Pipe armor 1 can make optical cable bear the side pressure ability of bigger, to be lost when catching fire by stainless steel corrugated flexible hose armouring Object fall is pounded in optical cable, and optical cable is hardly damaged.Optical cable can also be prevented to fracture simultaneously, it is reliable with the use for improving optical cable Property.And the first stainless steel corrugated flexible hose armor 1 can also play the role of completely cutting off flame, and open fire is prevented to be in direct contact shield Jacket layer.
Further, in order to improve the protective capability of restrictive coating, i.e., mostly important is the fire insulation function that blocks water.Based on this, It includes external sheath layer 2 and the inner restrictive coating 4 positioned at 2 inside of external sheath layer that can make restrictive coating, while in external sheath layer 2 and interior shield It is provided with the refuge floor 3 that blocks water between jacket layer 4, and preferably uses combined mica belt 3.Composite mica tape is by material water-proof material and mica Carrying material is combined, while having the function of blocking water and fire insulation.Wherein inner restrictive coating 4 and external sheath layer 2 preferably use low cigarette The flexibility of Halogen copolymer elastomer restrictive coating, low-smoke non-halogen flame-retardant copolymer elastomer is big, and optical cable is made to be easy to flexibly be bent.Into One step, in order to preferably protect fiber unit 6, to avoid the longitudinal infiltration of fiber unit 6, it is based on this, it can be in inner restrictive coating 4 Inside be provided with water blocking tape layer, corresponding each fiber unit 6 should be located on the inside of water blocking tape layer.
Further, fiber unit 6 as described above includes Loose tube and be arranged on the inside of Loose tube is optical fiber monomer 6-4.Loose tube is generally PBT casings (polybutylene terephthalate (PBT) Loose tube).It is contemplated that poly terephthalic acid fourth Naphthalate material smog in burning is larger, is easy to cause secondary injures and deaths.Based on this, preferred Loose tube is PP Loose tubes 6- herein 2 (polypropylene Loose tubes).In order to improve the heat-insulated and lateral pressure resistant ability of PP Loose tubes, it is based on this, can make the fiber unit 6 include The second stainless steel corrugated flexible hose armor 6-1 being set on the outside of PP Loose tubes 6-2 can be that PP Loose tubes carry out fire insulation and resist Side pressure is protected, and the time that optical cable is worked normally in the case where meeting with fire is improved.
As above, it is both provided with stainless steel ripple on the outside of the Loose tube 6-2 of the outside of external sheath layer 2 and fiber unit 6 Hose armor can greatly improve the fire resistant flame retardant and lateral pressure resistant ability of optical cable.In addition restrictive coating is divided into ectonexine, and It blocks water refuge floor 3 provided with composite mica tape between ectonexine, the fire insulation that blocks water of optical cable can be greatly improved.And low cigarette without Halogen inflaming retarding copolymer elastic body jacket layer 2 and 4 can also effectively improve the flexibility of optical cable other than energy is fire-retardant.And in optical fiber 6 inside of unit, instead of ointment, can be effectively reduced the inflammable thing of cable interior with the second water blocking yarn 6-3.Center adds simultaneously Strong part uses aramid fiber reinforcer 4, can greatly improve the flexibility and anti-flammability of optical cable.By the improvement of all parts, not only The flexibility of optical cable can be effectively improved, and makes optical cable that there is better lateral pressure resistant and better anti-flammability simultaneously.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest range consistent with features of novelty.

Claims (8)

1. a kind of flame-retardant optical cable, which is characterized in that external sheath layer, position including armor, on the inside of the armor The refuge floor that blocks water on the inside of the external sheath layer, is located at the interior shield at the inner restrictive coating on the inside of the refuge floor that blocks water Water blocking layer on the inside of jacket layer and the fiber unit on the inside of the water blocking layer and center reinforcemen, multiple fiber units It is arranged around the center reinforcemen, the center reinforcemen is aramid fiber composite reinforcement;The fiber unit includes PP pine sets Pipe, the optical fiber monomer on the inside of the PP Loose tubes and the second stainless steel corrugated flexible hose being set on the outside of the PP Loose tubes Armor.
2. flame-retardant optical cable according to claim 1, which is characterized in that further include being located on the outside of the center reinforcemen And the first water blocking yarn between the fiber unit is set.
3. flame-retardant optical cable according to claim 2, which is characterized in that the armor is that the first stainless steel ripple is soft Pipe armor.
4. flame-retardant optical cable according to claim 3, which is characterized in that the refuge floor that blocks water is composite mica tape Layer.
5. flame-retardant optical cable according to claim 4, which is characterized in that the water blocking layer includes waterstop.
6. flame-retardant optical cable according to claim 5, which is characterized in that the inner restrictive coating and the external sheath layer are equal For low-smoke non-halogen flame-retardant copolymer elastomer restrictive coating.
7. flame-retardant optical cable according to claim 1, which is characterized in that further include being located on the inside of the water blocking layer and setting Set the low smoke and zero halogen polyethylene gasket for packing between the fiber unit.
8. according to claim 1-7 any one of them optical cables, which is characterized in that be provided with and be filled in respectively in the PP Loose tubes The second water blocking yarn between a optical fiber monomer.
CN201721301306.6U 2017-10-10 2017-10-10 A kind of flame-retardant optical cable Active CN207976619U (en)

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CN201721301306.6U CN207976619U (en) 2017-10-10 2017-10-10 A kind of flame-retardant optical cable

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CN201721301306.6U CN207976619U (en) 2017-10-10 2017-10-10 A kind of flame-retardant optical cable

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113504618A (en) * 2021-05-31 2021-10-15 江苏通鼎光电科技有限公司 High-stability communication optical cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113504618A (en) * 2021-05-31 2021-10-15 江苏通鼎光电科技有限公司 High-stability communication optical cable
CN113504618B (en) * 2021-05-31 2023-08-22 江苏通鼎光电科技有限公司 High-stability communication optical cable

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Effective date of registration: 20210305

Address after: B4-18f, building B, Kexing Science Park, 15 Keyuan Road, Science Park community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000

Patentee after: SHENZHEN XIN'AOKE CABLE Co.,Ltd.

Address before: 518000 Sumitomo optical fiber Park, hi tech North District, Nanshan District, Shenzhen City, Guangdong Province

Patentee before: SEFC OPTICAL FIBER AND CABLE (SHENZHEN) Co.,Ltd.