CN103412386A - Rubber-covered wire optical cable - Google Patents
Rubber-covered wire optical cable Download PDFInfo
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- CN103412386A CN103412386A CN2013103328297A CN201310332829A CN103412386A CN 103412386 A CN103412386 A CN 103412386A CN 2013103328297 A CN2013103328297 A CN 2013103328297A CN 201310332829 A CN201310332829 A CN 201310332829A CN 103412386 A CN103412386 A CN 103412386A
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Abstract
The invention discloses a rubber-covered wire optical cable which comprises an optical fiber, a loose tube which wraps the optical fiber, and a protecting bush which wraps the loose tube. The protecting bush is made of inflaming retarding polyethylene materials. The residual length of the optical fiber in the loose tube ranges from minus 1%. to 0%. . According to the rubber-covered wire optical cable, the residual length of the optical fiber in the loose tube ranges from minus 1%. to 0%.; when the rubber-covered wire optical cable is used in an environment below minus 20 DEG C, the loose tube contracts due to coldness, and then the optical fiber is in an unstressed state in the loose tube; therefore, the optical performance of the optical fiber is enhanced.
Description
Technical field
The present invention relates to a kind of optical cable, relate in particular to a kind of covered wire cable that can use at extremely frigid zones.
Background technology
Optical cable forms the cable heart by the optical fiber of some according to certain way, is surrounded by sheath outward, and the also coating outer jacket had, in order to realize a kind of communication line of optical signal transmission.
On April 1st, 2013, " residential quarter and residential housing inner fiber are to family communications facility engineering design standard " and " residential quarter and residential housing inner fiber are to family communications facility engineering construction and acceptance specification " two national standard issues, make that Fiber to the home and become newly-built community to check and accept the pressure standard, the optical fiber rich and influential family engineering in simultaneously a lot of grown-ups and childrens district is also extremely urgent.And the covered wire cable serviceability temperature of " YD/T1997-2009_ Access Network butterfly leading in cable " standard code is-20 ℃-+60 ℃, if the covered wire cable sheath in Application standard all can occur that the sheath cracking causes the problems such as disconnected fibre in a lot of area winter.
Existing patent, for example publication number is the Chinese patent of CN101641626A: " optical cable ", its optical cable adopt plastic resin to make and split sheath; And for example publication number is the Chinese patent of CN1908716A: " optical cable ", it adopts thermoplastic resin to make sheath.The sheath that those optical fiber adopt relates to the problem that low temperature is used, the technical scheme of the problem of sheath cracking while also not solving the use of optical fiber low temperature.
Summary of the invention
Technical matters to be solved by this invention is, for the above-mentioned deficiency of prior art, proposes a kind of being suitable at low temperature environment, the covered wire cable that especially subzero environment below 20 ° is used.
The technical scheme that the present invention solves its technical matters employing is, propose a kind of covered wire cable, it comprises optical fiber, the loose sleeve pipe of parcel optical fiber and the sheath that coats described loose sleeve pipe, described sheath adopts fire-retardant polyethylene material to make, described optical fiber at the Yu Changwei-1 ‰ of loose sleeve pipe to 0 ‰.
The present invention uses the sheath material of fire-retardant polyethylene material as rubber-insulated wire optical fiber, utilize fire prevention and the resistance to low temperature of flame-proof polyethylene, make covered wire cable can guarantee that the fire-retardant fireproof performance of indoor optical cable can adapt to the environment for use of subzero 20 ℃ of temperature again preferably, not there will be problems of crack.
In addition, the present invention also uses loose casing protection optical fiber in optical cable, avoids optical fiber directly with sheath, to contact and cause optical fiber and sheath to bond, and both convenient construction librarian uses can reduce again the attenuation loss after optical fiber jacket.Further, the present invention also makes the Yu Changwei of optical fiber in loose sleeve pipe negative remaining long.In existing optical cable in order to improve the tensile property of optical cable, generally make fiber lengths be greater than loose casing length (being just remaining long), but due to optical cable when low temperature environment is used, the pine sleeve pipe also can continue to shorten, if use just remaining long optical fiber can make optical fiber long and make optical fiber stick casing wall with respect to loose sleeve pipe, affect the fiber optics performance.In the present invention, the remaining length-1 ‰ of optical fiber in loose sleeve pipe is to 0 ‰, and when subzero while below 20 ℃, using in environment, thereby loose sleeve pipe is met after cold contraction the optical property that the state that do not stress that makes optical fiber be in loose sleeve pipe strengthens optical fiber.
Further, described jacket outer surface is provided with the wire stripping groove that cross section is the V font.
The dead sheath of wire stripping groove is set and easily peels off, facilitate continued access, installation and maintenance.
Further, described excess fiber length is by following technology controlling and process:
S1: polybutylene terephthalate is extruded the loose bushing blank of rear formation;
S2: loose bushing blank is successively through the first hot water storgae and the first one-step forming of the second hot water storgae, and described the first hot water storgae temperature is 45 to 50 ℃, and the second hot water storgae temperature is 30 to 40 ℃;
S3: the loose bushing blank after first one-step forming is through the first cold rinse bank cooling forming after the long traction wheel pitch of the laps of excess enthalpy, and described the first cold rinse bank temperature is 15 to 20 ℃;
S4: take-up.
In the present invention, the polybutylene terephthalate (PBT) of the molten state that extruding machine is extruded is through the first one-step forming of twice hot water storgae, wherein the temperature of two hot water storgaes arranges through special, respectively higher than the glass temperature (40 to 45 ℃) of PBT with a little less than the glass temperature of PBT.In the first hot water storgae, because water temperature makes the slow crystallization of loose sleeve pipe higher than the glass temperature of PBT, make loose sleeve pipe shorten at length direction, excess fiber length increases.The first hot water storgae is in fact to make excess fiber length increase.In order to reach the negative remaining long effect of optical fiber of the present invention, also after the first hot water storgae, increased the second hot water storgae newly, the second hot water storgae temperature, lower than the glass temperature of PBT, has limited loose sleeve pipe and has further shunk, also reduce simultaneously the internal stress of loose sleeve pipe, made loose sleeve structure more stable.
In step S3, due to loose bushing blank first after the long traction wheel pitch of the laps of excess enthalpy through the first cold rinse bank cooling forming, make the loose bushing blank can be because of not cooling and shrink the pulling force can be subject on the contrary remaining long traction wheel and take-up stand and stretch in the first cold rinse bank cooling forming process, thereby guaranteed the formation of the negative remaining length of optical fiber.
Further, in step S4, takeup tension is the 400-450 gram.
Takeup tension is also one of effective technological parameter of regulating excess fiber length.The takeup tension Main Function is in the contraction process of loose sleeve pipe in cold rinse bank.Tension force is larger, stronger to pining down of cold contraction, just remaining long less.The present invention adopts the takeup tension of 400-500 gram, and the cold rinse bank temperature in matching step S3 makes excess fiber length meet the demands.
Further, in step S3, remaining long traction wheel is the remaining long traction wheel of two-wheel, comprises follower and driving wheel, and the loose bushing blank after first one-step forming is introduced into follower again by after driving wheel, being wound around the 8-10 circle.
Use the remaining long traction wheel of two-wheel, the loose bushing blank after first one-step forming is introduced into follower and by driving wheel, makes driving wheel more easily with the takeup tension in step S4, coordinate again.Being wound around the number of turns is the parameter that affect fiber lengths, because optical fiber excess length is a relative value, is the value that the length with respect to loose sleeve pipe produces, and by the physical length that is wound around the number of turns and affects optical fiber is set, is therefore also the important parameter that affects final excess fiber length.
Further, the component of described flame-proof polyethylene and parts by weight are:
Tygon has that lightweight is nontoxic, electric insulation is good and resistance to chemical corrosion, is good matrix material.Interpolation magnesium carbonate and white carbon are in order to improve the flame retardant effect of polythene material in tygon.
Adding organosilicon, vinyl acetate, dibutyl phthalate and butadiene rubber is mainly in order to improve the cold-resistant effect of flame-proof polyethylene, prevents sheath embrittlement under low temperature environment, cracking that flame-proof polyethylene is made.The vinyl acetate brittle temperature is subzero 75 ℃, and the dibutyl phthalate brittle temperature is subzero 55 ℃, and organosilicon can destroy poly structural regularity, reduces crystallinity, improves the low temperature impact properties of final products.
Further, described flame-proof polyethylene is made in the following way:
S1: join and get raw material and mix according to the above-mentioned raw materials proportioning;
S2: extruding pelletization injection mo(u)lding in injection machine in extruder.
The flame-proof polyethylene of the present invention by adopting specific components, loose sleeve pipe and optical fiber excess length are set, make covered wire cable of the present invention be highly suitable for extremely frigid zones, especially subzero zone below 20 ℃ is used.
The accompanying drawing explanation
Fig. 1 is the schematic cross-section of covered wire cable of the present invention.
Embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
Please refer to Fig. 1, covered wire cable of the present invention comprises one or more optical fiber 1, the parcel loose sleeve pipe 2 of optical fiber 1 and the sheath 3 that coats described loose sleeve pipe 1, and described sheath 3 adopts fire-retardant polyethylene materials to make, described optical fiber 1 at the Yu Changwei-1 ‰ of loose sleeve pipe 2 to 0 ‰.Preferably, but in order to increase the bearing tension of whole optical cable, supporting steel wire 4 and self-supporting steel wire 5 also are installed in sheath 3.More preferably, easily peel off in order to make optical cable, facilitate continued access, installation and maintenance, also at sheath 3 outside surfaces, be provided with the groove 6 that cross section is the V font.
Preferably, described excess fiber length is by following technology controlling and process:
S1: polybutylene terephthalate (PBT) is extruded the loose bushing blank of rear formation;
S2: loose bushing blank is successively through the first hot water storgae and the first one-step forming of the second hot water storgae, and described the first hot water storgae temperature is 45 to 50 ℃, and the second hot water storgae temperature is 30 to 40 ℃;
S3: the loose bushing blank after first one-step forming is through the first cold rinse bank cooling forming after the long traction wheel pitch of the laps of excess enthalpy, and described the first cold rinse bank temperature is 15 to 20 ℃;
In step S3, remaining long traction wheel is the remaining long traction wheel of two-wheel, comprises follower and driving wheel, and the loose bushing blank after first one-step forming is introduced into follower again by after driving wheel, being wound around the 8-10 circle.
S4: take-up.
In step S4, takeup tension is the 400-450 gram.
Preferably, component and the parts by weight of making the flame-proof polyethylene of sheath 3 are preferably:
Above-mentioned flame-proof polyethylene adopts conventional injection molding process to make and gets final product, and namely at first according to the above-mentioned raw materials proportioning, joins after getting raw material and mixes, then extruding pelletization injection mo(u)lding in injection machine in extruder.
The covered wire cable that the present invention makes is tested to its optical fiber attenuation value and sheath cracking situation under the environment of subzero 40 ℃ to subzero 50 ℃.Through the experiment, covered wire cable of the present invention under the environment of subzero 40 ℃ to subzero 50 ℃, optical fiber maximum attenuation value@1310nm<=0.40dB/km ,@1550nm<=0.30dB/km, optical fiber Fu adds Shuai Jian<=0.40dB/km, sheath is without cracking.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from the defined scope of spirit of the present invention.
Claims (7)
1. covered wire cable is characterized in that: comprise optical fiber, the loose sleeve pipe of parcel optical fiber and the sheath that coats described loose sleeve pipe, described sheath adopt fire-retardant polyethylene material to make, described optical fiber at the Yu Changwei-1 ‰ of loose sleeve pipe to 0 ‰.
2. covered wire cable according to claim 1, it is characterized in that: described jacket outer surface is provided with the wire stripping groove that cross section is the V font.
3. covered wire cable according to claim 1 is characterized in that: described excess fiber length is by following technology controlling and process:
S1: polybutylene terephthalate is extruded the loose bushing blank of rear formation;
S2: loose bushing blank is successively through the first hot water storgae and the first one-step forming of the second hot water storgae, and described the first hot water storgae temperature is 45 to 50 ℃, and the second hot water storgae temperature is 30 to 40 ℃;
S3: the loose bushing blank after first one-step forming is through the first cold rinse bank cooling forming after the long traction wheel pitch of the laps of excess enthalpy, and described the first cold rinse bank temperature is 15 to 20 ℃;
S4: take-up.
4. covered wire cable according to claim 3 is characterized in that: in step S3, remaining long traction wheel is the remaining long traction wheel of two-wheel, comprises follower and driving wheel, and the loose bushing blank after first one-step forming is introduced into follower and by after driving wheel, being wound around 8-10, encloses.
5. covered wire cable according to claim 3, it is characterized in that: in step S4, takeup tension is the 400-450 gram.
6. covered wire cable according to claim 1, it is characterized in that: the component of described flame-proof polyethylene and parts by weight are:
7. covered wire cable according to claim 6, it is characterized in that: described flame-proof polyethylene is made in the following way:
S1: join and get raw material and mix according to the above-mentioned raw materials proportioning;
S2: extruding pelletization injection mo(u)lding in injection machine in extruder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310332829.7A CN103412386B (en) | 2013-08-01 | 2013-08-01 | A kind of covered wire cable excess fiber length control method |
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| CN201310332829.7A CN103412386B (en) | 2013-08-01 | 2013-08-01 | A kind of covered wire cable excess fiber length control method |
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| CN103412386A true CN103412386A (en) | 2013-11-27 |
| CN103412386B CN103412386B (en) | 2016-01-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570245A (en) * | 2014-12-16 | 2015-04-29 | 成都亨通光通信有限公司 | Novel 8-shaped self-supporting optical cable |
| CN106019518A (en) * | 2016-08-15 | 2016-10-12 | 河南省通信电缆有限公司 | Insect-bite-preventing rubber-insulated wire cable |
| CN108121041A (en) * | 2017-11-24 | 2018-06-05 | 南京华信藤仓光通信有限公司 | One kind, which is drawn to connect, uses aerial optical cable |
| CN108549137A (en) * | 2018-06-26 | 2018-09-18 | 浙江盛安电力科技有限公司 | A kind of safety-type self-bearing type butterfly optical cable convenient for stripping |
| CN111751945A (en) * | 2020-06-17 | 2020-10-09 | 王海燕 | Multi-node rib-like bending-proof communication optical fiber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570245A (en) * | 2014-12-16 | 2015-04-29 | 成都亨通光通信有限公司 | Novel 8-shaped self-supporting optical cable |
| CN106019518A (en) * | 2016-08-15 | 2016-10-12 | 河南省通信电缆有限公司 | Insect-bite-preventing rubber-insulated wire cable |
| CN108121041A (en) * | 2017-11-24 | 2018-06-05 | 南京华信藤仓光通信有限公司 | One kind, which is drawn to connect, uses aerial optical cable |
| CN108549137A (en) * | 2018-06-26 | 2018-09-18 | 浙江盛安电力科技有限公司 | A kind of safety-type self-bearing type butterfly optical cable convenient for stripping |
| CN111751945A (en) * | 2020-06-17 | 2020-10-09 | 王海燕 | Multi-node rib-like bending-proof communication optical fiber |
| CN111751945B (en) * | 2020-06-17 | 2022-03-11 | 江苏科信光电科技有限公司 | Multi-node rib-like bending-proof communication optical fiber |
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| Publication number | Publication date |
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| CN103412386B (en) | 2016-01-20 |
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Address after: 315191, No. 6, high voltage Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: ZHEJIANG SHIP ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 315191, No. 31, North Road, Jiangshan Town, Yinzhou District, Zhejiang, Ningbo Patentee before: ZHEJIANG SHIP ELECTRONIC TECHNOLOGY Co.,Ltd. |