CN103412386B - A kind of covered wire cable excess fiber length control method - Google Patents
A kind of covered wire cable excess fiber length control method Download PDFInfo
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- CN103412386B CN103412386B CN201310332829.7A CN201310332829A CN103412386B CN 103412386 B CN103412386 B CN 103412386B CN 201310332829 A CN201310332829 A CN 201310332829A CN 103412386 B CN103412386 B CN 103412386B
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Abstract
The present invention discloses a kind of covered wire cable excess fiber length control method, this covered wire cable comprises optical fiber, the parcel Loose tube of optical fiber and the sheath of coated described Loose tube, described sheath adopts fire-retardant polyethylene material to make, and described optical fiber is at the Yu Changwei-1 ‰ to 0 ‰ of Loose tube.In the present invention, optical fiber in Loose tube more than long by-1 ‰ to 0 ‰, when using in subzero less than 20 DEG C environment, Loose tube makes optical fiber be in the state of not stressing in Loose tube after meeting cold events thus strengthens the optical property of optical fiber.
Description
Technical field
The present invention relates to a kind of optical cable and optical fibres excess length control method, particularly relate to a kind of covered wire cable excess fiber length control method 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, the also coated 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 code " and " residential quarter and residential housing inner fiber are to family communications facility engineering construction and acceptance specification " two national standards are issued, make fiber to the home become newly-built community and check and accept pressure standard, the optical fiber rich and influential family engineering in a lot of grown-ups and children district is also extremely urgent simultaneously.And the covered wire cable serviceability temperature that " YD/T1997-2009_ Access Network butterfly leading in cable " standard specifies is-20 DEG C-+60 DEG C, if the covered wire cable sheath in use standard, then all can occur that sheath cracking causes the problems such as disconnected fibre winter in a lot of areas.
Existing patent, such as publication number is the Chinese patent of CN101641626A: " optical cable ", and its optical cable adopts plastic resin to make and splits sheath; And for example publication number is the Chinese patent of CN1908716A: " optical cable ", and it adopts thermoplastic resin to make sheath.The sheath that those optical fiber adopts relates to the problem that low temperature uses, and does not also solve the technical scheme of the problem of sheath cracking when optical fiber low temperature uses.
Summary of the invention
Technical matters to be solved by this invention is, for the above-mentioned deficiency of prior art, proposes one and is suitable at low temperature environment, the covered wire cable excess fiber length control method that especially subzero less than 20 ° environment use.
The technical scheme that the present invention solves the employing of its technical matters is, a kind of covered wire cable excess fiber length control method is proposed, it comprises optical fiber, the parcel Loose tube of optical fiber and the sheath of coated described Loose tube, described sheath adopts fire-retardant polyethylene material to make, and described optical fiber is at the Yu Changwei-1 ‰ to 0 ‰ of Loose tube.
The present invention uses fire-retardant polyethylene material as the sheath material of rubber-insulated wire optical fiber, utilize fire prevention and the resistance to low temperature of flame-proof polyethylene, covered wire cable can be ensured, and the fire-retardant fireproof performance of indoor optical cable can adapt to again the environment for use of subzero 20 DEG C of temperature preferably, there will not be problems of crack.
In addition, the present invention also uses Loose tube to protect optical fiber in optical cable, avoids optical fiber directly contact with sheath and cause optical fiber and sheath to bond, 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 tube negative remaining long.In order to improve the tensile property of optical cable in existing optical cable, fiber lengths is generally made to be greater than Loose tube length (being just remaining long), but because optical cable is when low temperature environment uses, Loose tube also can continue to shorten, if use just remaining long optical fiber, optical fiber can be made long and make optical fiber stick casing wall relative to Loose tube, affect fiber optics performance.In the present invention, optical fiber in Loose tube more than long by-1 ‰ to 0 ‰, when using in subzero less than 20 DEG C environment, Loose tube makes optical fiber be in the state of not stressing in Loose tube after meeting cold events thus strengthens the optical property of optical fiber.
Further, described jacket outer surface is provided with the wire stripping groove that cross section is V-shaped.
Arrange the dead sheath of wire stripping groove easily to peel off, facilitate continued access, installation and maintenance.
Further, described excess fiber length is by following technology controlling and process:
S1: polybutylene terephthalate extrudes rear formation Loose tube base substrate;
S2: Loose tube base substrate is successively through the first hot water storgae and the second hot water storgae just one-step forming, and described first hot water storgae temperature is 45 to 50 DEG C, and the second hot water storgae temperature is 30 to 40 DEG C;
S3: the Loose tube base substrate 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 first cold rinse bank temperature is 15 to 20 DEG C;
S4: take-up.
In the present invention, the polybutylene terephthalate (PBT) of the molten state extruded by extruding machine is through twice hot water storgae just one-step forming, wherein the temperature of two hot water storgaes is arranged, respectively higher than the glass temperature (40 to 45 DEG C) of PBT and the glass temperature a little less than PBT through special.In the first hot water storgae, because water temperature makes the slow crystallization of Loose tube higher than the glass temperature of PBT, Loose tube is shortened at length direction, excess fiber length increases.First hot water storgae is in fact that excess fiber length is added.Remaining long effect is born in order to reach 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, limits Loose tube and further shrinks, also reduce the internal stress of Loose tube simultaneously, make Loose tube structure more stable.
In step S3, due to Loose tube base substrate first after the long traction wheel pitch of the laps of excess enthalpy through the first cold rinse bank cooling forming, Loose tube base substrate can not be shunk because of cooling in the first cold rinse bank cooling forming process and can be subject to the pulling force of remaining long traction wheel and take-up stand on the contrary and stretch, thus ensure that remaining long formation born by optical fiber.
Further, in step S4, takeup tension is 400-450 gram.
Takeup tension is also one of effective technological parameter regulating excess fiber length.Takeup tension mainly acts on the contraction process of Loose tube in cold rinse bank.Tension force is larger, stronger to pining down of cold events, 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 long traction wheel more than two-wheel, comprises follower and driving wheel, and the Loose tube base substrate after first one-step forming is introduced into follower again by being wound around 8-10 circle after driving wheel.
Long traction wheel more than use two-wheel, the Loose tube base substrate after first one-step forming is introduced into follower and by driving wheel, driving wheel is more easily coordinated with the takeup tension in step S4 again.Being wound around the number of turns is the parameter affecting fiber lengths, because optical fiber excess length is a relative value, is the value produced relative to the length of Loose tube, and the physical length therefore affecting optical fiber by arranging the winding number of turns is also the important parameter affecting 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.In tygon, add magnesium carbonate and white carbon is flame retardant effect in order to improve polythene material.
Add organosilicon, vinyl acetate, dibutyl phthalate and butadiene rubber mainly in order to improve the cold-resistant effect of flame-proof polyethylene, the sheath preventing flame-proof polyethylene from making is brittle, cracking at low ambient temperatures.Vinyl acetate brittle temperature is subzero 75 DEG C, and dibutyl phthalate brittle temperature is subzero 55 DEG C, 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 according to above-mentioned raw materials proportioning and get raw material and mix;
S2: extruding pelletization injection mo(u)lding in injection machine in an extruder.
The present invention, by adopting the flame-proof polyethylene of specific components, arranging Loose tube and optical fiber excess length, makes covered wire cable of the present invention be highly suitable for extremely frigid zones, and the region of especially subzero less than 20 DEG C uses.
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 and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Please refer to Fig. 1, covered wire cable of the present invention comprises one or more optical fiber 1, the parcel Loose tube 2 of optical fiber 1 and the sheath 3 of coated described Loose tube 1, and described sheath 3 adopts fire-retardant polyethylene material to make, and described optical fiber 1 is at the Yu Changwei-1 ‰ to 0 ‰ of Loose tube 2.Preferably, in order to increase the born pulling force of whole optical cable, also supporting steel wire 4 and self-supporting steel wire 5 are installed in sheath 3.More preferably, in order to make optical cable easily peel off, facilitating continued access, installation and maintenance, also sheath 3 outside surface being provided with the groove 6 that cross section is V-shaped.
Preferably, described excess fiber length is by following technology controlling and process:
S1: polybutylene terephthalate (PBT) extrudes rear formation Loose tube base substrate;
S2: Loose tube base substrate is successively through the first hot water storgae and the second hot water storgae just one-step forming, and described first hot water storgae temperature is 45 to 50 DEG C, and the second hot water storgae temperature is 30 to 40 DEG C;
S3: the Loose tube base substrate 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 first cold rinse bank temperature is 15 to 20 DEG C;
In step S3, remaining long traction wheel is long traction wheel more than two-wheel, comprises follower and driving wheel, and the Loose tube base substrate after first one-step forming is introduced into follower again by being wound around 8-10 circle after driving wheel.
S4: take-up.
In step S4, takeup tension is 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, namely first according to above-mentioned raw materials proportioning join get raw material after mix, then extruding pelletization injection mo(u)lding in injection machine in an extruder.
Covered wire cable the present invention obtained tests its optical fiber attenuation value and sheath cracking situation under the environment of subzero 40 DEG C to subzero 50 DEG C.Through experiment, covered wire cable of the present invention is under the environment of subzero 40 DEG C to subzero 50 DEG C, and optical fiber maximum attenuation value 1310nm≤0.40dB/km, 1550nm≤0.30dB/km, optical fiber Fu adds Shuai Jian≤0.40dB/km, and 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 amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from the scope that spirit of the present invention defines.
Claims (4)
1. a covered wire cable excess fiber length control method, it is characterized in that: covered wire cable comprises: optical fiber, the parcel Loose tube of optical fiber and the sheath of coated described Loose tube, described sheath adopts fire-retardant polyethylene material to make, and described optical fiber is at the Yu Changwei-1 ‰ to 0 ‰ of Loose tube;
Described excess fiber length is by following technology controlling and process:
S1: polybutylene terephthalate extrudes rear formation Loose tube base substrate;
S2: Loose tube base substrate is successively through the first hot water storgae and the second hot water storgae just one-step forming, and described first hot water storgae temperature is 45 to 50 DEG C, and the second hot water storgae temperature is 30 to 40 DEG C;
S3: the Loose tube base substrate 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 first cold rinse bank temperature is 15 to 20 DEG C;
S4: take-up;
In step S3, remaining long traction wheel is long traction wheel more than two-wheel, comprises follower and driving wheel, and the Loose tube base substrate after first one-step forming is introduced into follower again by being wound around 8-10 circle after driving wheel;
In step S4, takeup tension is 400-450 gram.
2. covered wire cable excess fiber length control method according to claim 1, is characterized in that: described jacket outer surface is provided with the wire stripping groove that cross section is V-shaped.
3. covered wire cable excess fiber length control method according to claim 1, is characterized in that: the component of described flame-proof polyethylene and parts by weight are:
4. covered wire cable excess fiber length control method according to claim 3, is characterized in that: described flame-proof polyethylene is made in the following way:
S1: get raw material according to said components and parts by weight and mix;
S2: extruding pelletization injection mo(u)lding in injection machine in an 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 CN103412386A (en) | 2013-11-27 |
| CN103412386B true CN103412386B (en) | 2016-01-20 |
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Families Citing this family (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 |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2872389Y (en) * | 2006-03-20 | 2007-02-21 | 西古光纤光缆有限公司 | House sleeved optical-fiber cable |
| CN201181347Y (en) * | 2007-11-20 | 2009-01-14 | 苏州敏杰光电科技有限公司 | Non-metallic composite optical fiber cable suspension lines |
| CN201184922Y (en) * | 2008-04-18 | 2009-01-21 | 江苏亨通光电股份有限公司 | Novel fibre-optical-to-door synthesis leadingin covered wire optical cable |
| CN101954730A (en) * | 2009-07-16 | 2011-01-26 | 江苏通鼎光电股份有限公司 | High-speed optical fiber secondary coating production equipment |
| CN103048748A (en) * | 2012-12-26 | 2013-04-17 | 青岛中能集团有限公司 | Layer-stranding type outdoor special optical cable beam tube extruding process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7184634B2 (en) * | 2004-03-25 | 2007-02-27 | Corning Cable Systems, Llc. | Fiber optic drop cables suitable for outdoor fiber to the subscriber applications |
-
2013
- 2013-08-01 CN CN201310332829.7A patent/CN103412386B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2872389Y (en) * | 2006-03-20 | 2007-02-21 | 西古光纤光缆有限公司 | House sleeved optical-fiber cable |
| CN201181347Y (en) * | 2007-11-20 | 2009-01-14 | 苏州敏杰光电科技有限公司 | Non-metallic composite optical fiber cable suspension lines |
| CN201184922Y (en) * | 2008-04-18 | 2009-01-21 | 江苏亨通光电股份有限公司 | Novel fibre-optical-to-door synthesis leadingin covered wire optical cable |
| CN101954730A (en) * | 2009-07-16 | 2011-01-26 | 江苏通鼎光电股份有限公司 | High-speed optical fiber secondary coating production equipment |
| CN103048748A (en) * | 2012-12-26 | 2013-04-17 | 青岛中能集团有限公司 | Layer-stranding type outdoor special optical cable beam tube extruding process |
Non-Patent Citations (1)
| Title |
|---|
| 有机硅和EVA对阻燃聚乙烯体系的影响;吴洁，李建新;《消防科学与技术》;20110228;第30卷(第2期);149-150 * |
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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. |