CN202362508U - Central tube type all dielectric self-supporting optical fiber cable (ADSS) - Google Patents
Central tube type all dielectric self-supporting optical fiber cable (ADSS) Download PDFInfo
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- CN202362508U CN202362508U CN2011204260917U CN201120426091U CN202362508U CN 202362508 U CN202362508 U CN 202362508U CN 2011204260917 U CN2011204260917 U CN 2011204260917U CN 201120426091 U CN201120426091 U CN 201120426091U CN 202362508 U CN202362508 U CN 202362508U
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- optical fiber
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Abstract
The utility model discloses a central tube type all dielectric self-supporting optical fiber cable, comprising an optical fiber, a water-blocking material, a loose tube, an aramid fiber and outer sheath. The water-blocking material is filled on the outside of the optical fiber, the optical fiber and the water-blocking material are wrapped via the loose tube, and the aramid fiber is armored on the outside of the loose tube, and finally, the aramid fiber is wrapped via the outer sheath. According to the utility model, the central tube type ADSS can realize a large span application, thereby reducing the manufacturing cost and construction cost of the ADSS substantially, and providing a low cost cable solution method for the fiber to the home popularizations in the regions, such as mountain area, small towns, rural, etc.
Description
Technical field
The utility model belongs to the communications optical cable technology, is specifically related to a kind of central tubular All Dielectric self-support.
Background technology
The general cable core of traditional All Dielectric self-support (being called for short the ADSS optical cable) adopts layer-twisted type and central tubular structure; The layer-twisted type structure has two kinds; As shown in Figure 1; Wherein more than the big 1500m of the present practical commercial operation span of the two sheath structures of layer-twisted type, and single sheath layer-twisted type structure according to DL/T 788-2001 " All Dielectric self-support " standard-required generally be used for span at 100m with interior built on stilts laying-out.Though in DL/T 788-2001 " All Dielectric self-support " standard, mention the ADSS optical cable of central tubular; But consider the shortcoming of manufacturing process difficulty and optical cable characteristic aspect; In fact almost do not use, span is had never heard of in the commercial operation of 50m especially.
The ADSS optical cable is a kind of nonmetal All Dielectric self-support, full medium be optical cable used be all insulation dielectric material; Self-bearing type is meant that self stiffener can bear deadweight and external load.The version of the ADSS optical cable of commercial application mainly is loose sleeve pipe layer-twisted type structure in the market.Because in layer-stranding cable, loose sleeve pipe is stranded with the S-Z form, forms certain stranded surplus length.Optical fiber excess length is very crucial technical indicator in the ADSS optical cable, and Yu Changtai is little, and optical fiber will stressedly cause the loss increase, even optical fiber broken, and this is unallowed.Yu Changtai is big, and loose sleeve pipe is too little around the winding pitch of non-metal reinforcement member (being FRP), causes the static buckling strain of optical fiber excessive, also can influence the optical fiber life-span.Consider ADSS in built on stilts laid processes, it is bigger that it is influenced by meteorological environmental change, and the ADSS optical cable must have suitable and stable surplus long control.Obtain through the control of S-Z twisting pitch because of the surplus long control of layer-twisted type structure is main,, just can obtain required surplus length as long as pitch control suitably.The S-Z cable-former is quite ripe in the optical communication industry at present, has therefore brought up the primary structure of domestic large-scale use layer-twisted type structure as the ADSS optical cable at present.
Along with the great development of FTTx construction in recent years, optical fiber progressively overflows near to user side, and the FTTx construction not only requires networking flexibility convenient, also need be with low cost.The layer-twisted type ADSS cable configuration of using in the market is big, and external diameter is thicker, and weight is big, and the load that receives external environment wind speed and icing also can increase, and is corresponding, and the aramid fiber of use is also many, and price will be than higher like this, and construction is also inconvenient.
The utility model content
To the existing in prior technology problem, the utility model proposes a kind of central tubular All Dielectric self-support, and this optical cable comprises optical fiber, water-blocking material, loose sleeve pipe, aramid fiber and oversheath; Optical fiber is filled water-blocking material outward, through loose sleeve pipe optical fiber and water-blocking material is wrapped up, and loose sleeve pipe is armoured to have aramid fiber, through oversheath aramid fiber is wrapped up at last; The pine sleeve pipe comprises that internal layer once overlaps to be moulded and secondary coating, and once cover is moulded process using high-modulus, high strength, low shrinkable polymer, the polyolefine material that secondary coating process using glass temperature is low than internal layer polymer; This cable outer diameter is at 5～8mm, and specified tensile strength is 5600～24500 N, and it is 2240～9800 N that tension force is used in maximum permission, can realize wall pressure 2000 ~ 4000N/100mm.
Further, the secondary coating polymkeric substance has suitable softening point, guarantees when the outer protective sleeve extrusion molding, and its outer protective sleeve temperature can be softened the secondary coating layer through hot water storgae the time, thereby realizes combining closely between secondary coating layer and the oversheath.
The utility model is simple in structure, in light weight, and easy construction is quick, has reduced construction period and construction cost greatly, for the development of Access Network provides a kind of brand-new solution;
External diameter little (can realize 12 core fibres, when tension force 5KN was used in the maximum permission of ADSS optical cable, external diameter was no more than 7.0mm); Receive the external diameter environmental impact also just little when laying built on stilts, promptly suffered load is little, is therefore satisfying identical laying under the environment; Design through mechanics; Can be less with expensive non-metallic fibers reinforcement material, for the promotion and application of product provide power-assisted, also established cost basis for the great development of China FTTx construction.
The utility model adopts all dielectric self-supporting structural design, has tangible lightning protection effect, in the FTTx process of construction of rural area, can utilize existing local telephone network electric pole directly to lay to family, and the popularization of building for rural area FTTx has brought facility.
The utility model adopts twice cover of central tubular to mould technology; Both can mould the control that operation realizes the surplus length of loose sleeve pipe inner fiber secondary, can realize the requirement of mechanical propertys such as high wall pressure, high strength and environment for use required when the big span of this product lays and temperature performance again through twice cover.
Description of drawings
Figure 1A is layer stranded full-medium self-support cable (two sheath structure).
Figure 1B is layer stranded full-medium self-support cable (single restrictive coating structure).
Fig. 2 is the central tubular All Dielectric self-support.
Fig. 3 is a central tubular All Dielectric self-support process chart.
Fig. 4 is a central tubular All Dielectric self-support structural drawing.
Embodiment
Below in conjunction with accompanying drawing utility model is further described.
The utility model adopts the central tubular structure; Just whole cable has only a sleeve pipe; And adopt novel structure design and technology controlling and process, not only can well solve the surplus long problem of loose sleeve pipe inner fiber, but also can solve cable outer diameter thick, from problems such as great and construction inconvenience; For China FTTx builds a kind of brand-new optical cable is provided, it is following that it designs and develops process.
In structured design process, we have considered built on stilts characteristics of laying emphatically, promptly following 3 points.
A. utilize existing local telephone network electric pole to lay, so the utility model is considered at aspects such as structural design, technology controlling and process and costs all to be the Design Theory basis with built on stilts the laying of self-supporting.
B. the utility model is the ADSS optical cable; Be laid in and adopt gold utensil (strain insulator or overhanging golden tool) to fixedly mount on the wire pole tower; Twine the optical cable of holding with a firm grip (also can adopt other modes hold with a firm grip optical cable) through preformed armor rods between gold utensil and the optical cable and draw or hang, so the ADSS optical cable must have certain anti-measuring pressure in case preformed armor rods (or other gold utensil) is held with a firm grip and damage optical cable.
C. being that self-bearing type is built on stilts because of it lays application, so must have suitable and stable surplus long control, and to guarantee its under the external diameter environment of complicacy (like icing or strong wind situation), optical cable can bear certain load force, guarantees that optical cable normally moves.
Through above 3 considerations, we mould the high lateral pressure resistant property and stable suitable surplus long control that technology realizes optical cable through the agent of loose sleeve pipe secondary.Popular saying is exactly at first optical fiber to be moulded technology through cover to be extruded onto into certain thickness loose sleeve pipe, fills water-blocking material in the loose sleeve pipe, and then is extruded onto certain thickness polymeric material (like polyolefin), i.e. secondary coating technology through extruding machine again in pine cover tube outside.Secondary coating technology is controlled the surplus length of the secondary of realizing loose sleeve pipe except the tension system and the tank step temperature reduction technology of routine; The most important thing is to control the surplus length of loose sleeve pipe inner fiber through the wall thickness of secondary coating polymeric material; Promptly under the identical situation of other process conditions, the polymeric material wall thickness is big more, and sleeve pipe shrinks big more; Be that the surplus length of loose sleeve pipe inner fiber is also just big more after the secondary coating technology; Wall thickness control obtains when needing only us to secondary coating, just can obtain required surplus long control, and then the surplus long control of realization central tubular ADSS optical cable.
Once cover is moulded technology and is generally adopted high-modulus, high strength, low shrinkable polymer, like polybutylene terephthalate (PBT), nylon or modified polypropene (PP) etc.; And secondary coating technology generally adopts glass temperature than polyolefine materials such as low tygon of internal layer polymer or nylon.
The utility model cable configuration is described as: central tubular sleeve pipe, polyolefine material secondary coating, non-metallic fibers are strengthened the polyethylene bonding sheath, and the non-metallic fibers reinforcement material is generally selected aramid yarn, high-carbon silvalin or thermosetting glass fiber yarn etc.
Referring to Fig. 2,4.
(1) loose sleeve pipe adopts the double-layer composite material structure; Improved the lateral pressure resistant power (can realize more than the wall pressure 4000N/100mm) of central tubular ADSS optical cable greatly; Being convenient to gold utensil holds with a firm grip and does not damage optical cable; Established theoretical foundation for the big span application of central tubular ADSS optical cable, central tubular ADSS optical cable can have been satisfied in the above span of 500m lay application.
(2) the utility model is because of traditional relatively ADSS optical cable, external diameter little (below 12 cores, external diameter is generally in 5～8mm), in light weight, intensity is high, and the lateral pressure resistant performance is good, following table is 2 cores, 6 cores and 12 core ADSS optical cable canonical parameter tables.
Table 1:2 core ADSS optical cable canonical parameter table
Table 2:6 core ADSS optical cable canonical parameter table
Table 3:12 core ADSS optical cable canonical parameter table
(3) loose sleeve pipe adopts two technology autofrettages, promptly once overlaps with high-modulus, high-intensity polymkeric substance earlier and moulds technology, outside loose sleeve pipe, directly coats the less relatively polymkeric substance of the certain thickness softening point of one deck then again.
(4) through secondary coating technology; Cover is moulded extruded the loose sleeve pipe that forms, surplus temperature heats internal layer pine shell material (like PBT, nylon or PP) during through secondary coating, and is higher than the glass temperature of internal layer pine shell material (like PBT, nylon or PP); Realize the recrystallization of internal layer pine shell material (like PBT, nylon or PP); Thereby can realize the surplus long control that loose sleeve pipe is stable, can exempt loose sleeve pipe post shrinkage problem again, improve the stability and the heatproof degree performance of product.
(5) the utility model secondary coating polymkeric substance has suitable softening point; Guarantee when the outer protective sleeve extrusion molding; Its outer protective sleeve temperature can be softened the secondary coating layer through hot water storgae the time, thereby realizes combining closely between secondary coating layer and the oversheath, and the required power value of oversheath of promptly extracting 100mm length is not less than 40N; Aramid fiber tension force is given full play to, and assurance optical cable integral body has well hales intensity.
(6) the surplus long control of central tubular ADSS optical cable is not only controlled through traditional retractable cable Tension Control, step water temperature and the control of traction speed difference, and the wall thickness of polymeric material is realized the long control in Dayu stable in the loose sleeve pipe during the strict control of the utility model employing secondary coating.
(7) realize the long control in Dayu through the secondary coating operation, promptly loose sleeve pipe inner fiber is surplus grows up in 8.0 ‰, has solved the defective that the long control in optical fiber Dayu must adopt layer strand mode to realize.
Referring to Fig. 3, Fig. 3 is a central tubular All Dielectric self-support process chart, comprising:
A. optical fiber is put in storage: the optical fiber of warehouse-in is screened, select the good and qualified optical fiber of tension force of transport property.
B. optical fiber coloring: earlier with optical fiber coloring, the whole chromatogram of selection standard identifies, and requires high temperature colour-fast, is prone to identification when guaranteeing to continue.
C. once cover is moulded; Optical fiber after painted is inserted in the high-modulus sleeve pipe that is filled with hydrophobic gel, makes the sleeve pipe inner fiber have stable surplus long control and transport property.
D. secondary coating: outside sleeve pipe, extrude one deck polyolefine material again and realize secondary tricks technology.
E. wrap up oversheath: be evenly distributed on the inner sheath surface with the aramid yarn armouring, be inserted in the tygon oversheath of high-modulus.
F. detect outbound: at last optical cable is done full performance test, guarantee the encapsulation outbound of qualified back.
Referring to Fig. 4; Some optical fiber through internal layer once overlap mould technology by bale breaking loose sleeve pipe in; Pine sleeve pipe internal clearance is filled water-blocking material; Be extruded onto one layer of polymeric material (like polyolefin) again in pine cover tube outside then and realize secondary coating technology, realize the long control in loose sleeve pipe inner fiber Dayu requirement, waterproofing type aramid yarn armouring and polyolefin oversheath then through secondary tricks technology.
The above only is a preferred embodiments of the utility model, and the interest field that the utility model is advocated is not limited thereto.The utility model also can have other various embodiments; Under the situation that does not deviate from the utility model spirit and essence thereof; Those skilled in the art work as can make various corresponding changes and distortion according to the utility model, but these changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (1)
1. central tubular All Dielectric self-support, it is characterized in that: this optical cable comprises optical fiber, water-blocking material, loose sleeve pipe, aramid fiber and oversheath; Optical fiber is filled water-blocking material outward, through loose sleeve pipe optical fiber and water-blocking material is wrapped up, and loose sleeve pipe is armoured to have aramid fiber, through oversheath aramid fiber is wrapped up at last;
The pine sleeve pipe comprises that internal layer once overlaps to be moulded and secondary coating, and once cover is moulded process using high-modulus, high strength, low shrinkable polymer, the polyolefine material that secondary coating process using glass temperature is low than internal layer polymer;
This cable outer diameter is at 5～8mm, and specified tensile strength is 5600～24500 N, and it is 2240～9800 N that tension force is used in maximum permission, can realize wall pressure 2000～4000N/100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204260917U CN202362508U (en) | 2011-11-01 | 2011-11-01 | Central tube type all dielectric self-supporting optical fiber cable (ADSS) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204260917U CN202362508U (en) | 2011-11-01 | 2011-11-01 | Central tube type all dielectric self-supporting optical fiber cable (ADSS) |
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| CN202362508U true CN202362508U (en) | 2012-08-01 |
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| CN2011204260917U Expired - Fee Related CN202362508U (en) | 2011-11-01 | 2011-11-01 | Central tube type all dielectric self-supporting optical fiber cable (ADSS) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360107A (en) * | 2011-11-01 | 2012-02-22 | 江苏亨通光电股份有限公司 | Central tube type all-dielectric self-supporting (ADSS) optical cable and manufacturing method thereof |
| CN102749693A (en) * | 2012-08-14 | 2012-10-24 | 成都亨通光通信有限公司 | Novel environment-protection, rat-proof and ant-proof optical cable and processing technology thereof |
| CN103412385A (en) * | 2013-07-30 | 2013-11-27 | 成都亨通光通信有限公司 | Reinforced type self-supporting optic fiber cable |
| WO2018133479A1 (en) * | 2017-01-17 | 2018-07-26 | 烽火通信科技股份有限公司 | Water-absorption-type optical fibre loose tube and manufacturing method therefor |
-
2011
- 2011-11-01 CN CN2011204260917U patent/CN202362508U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360107A (en) * | 2011-11-01 | 2012-02-22 | 江苏亨通光电股份有限公司 | Central tube type all-dielectric self-supporting (ADSS) optical cable and manufacturing method thereof |
| CN102360107B (en) * | 2011-11-01 | 2014-05-07 | 江苏亨通光电股份有限公司 | Central tube type all-dielectric self-supporting (ADSS) optical cable and manufacturing method thereof |
| CN102749693A (en) * | 2012-08-14 | 2012-10-24 | 成都亨通光通信有限公司 | Novel environment-protection, rat-proof and ant-proof optical cable and processing technology thereof |
| CN102749693B (en) * | 2012-08-14 | 2013-04-10 | 成都亨通光通信有限公司 | Environment-protection, rat-proof and ant-proof optical cable and processing technology thereof |
| CN103412385A (en) * | 2013-07-30 | 2013-11-27 | 成都亨通光通信有限公司 | Reinforced type self-supporting optic fiber cable |
| WO2018133479A1 (en) * | 2017-01-17 | 2018-07-26 | 烽火通信科技股份有限公司 | Water-absorption-type optical fibre loose tube and manufacturing method therefor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20121101 |