CN204044409U - A kind of Full-dry optical fiber band optical cable - Google Patents
A kind of Full-dry optical fiber band optical cable Download PDFInfo
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- CN204044409U CN204044409U CN201420469662.9U CN201420469662U CN204044409U CN 204044409 U CN204044409 U CN 204044409U CN 201420469662 U CN201420469662 U CN 201420469662U CN 204044409 U CN204044409 U CN 204044409U
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Abstract
The utility model provides a kind of Full-dry optical fiber band optical cable, and comprise at least one fibre ribbon, described fibre ribbon is arranged in fiber matrix; Xsect is circular sheath, and be provided with the rectangular longitudinal chamber of departing from its center line in described sheath, described fiber matrix is placed in described rectangular longitudinal chamber, and both 4 sides are corresponding; Article two, waterstop, lays along two relative radial side in described fiber matrix, and is filled between the radial side of described fiber matrix and the inwall in rectangular longitudinal chamber; Metallic strength member, is arranged in described sheath, and described metallic strength member is arranged in the center line in described rectangular longitudinal chamber and the determined plane of center line of described sheath, and the center line of itself and sheath is positioned at the homonymy in described rectangular longitudinal chamber.Single strengthening core, in conjunction with the structural design in eccentric rectangular longitudinal chamber, is allowed in bending radius at fibre ribbon, makes the bending property of optical cable better, avoids owing to arranging many strengthening cores, causes jacket thickness uneven and the bending crack that brings.
Description
Technical field
The invention belongs to without bushing type optical cable field, especially relates to a kind of optical fibre band optical cable.
Background technology
Along with the sustainable growth of transinformation and broadband services demand, the needs built with fiber to the home (FTTH), obviously increase the demand of high fiber count cable.A large amount of construction of Metropolitan Area Network (MAN) and Access Network make urban duct resource more and more valuable, and high fiber count cable is subject to the restriction in urban Underground pipeline space.Improve density of optic fibre, reduce the physical dimension of high fiber count cable, while reducing fiber optic cable manufacture raw materials consumption, high fiber count cable can be applicable in existing Urban Underground sub-pipes.
Existing central beam tube type optical fibre band optical cable, fibre ribbon is placed in Loose tube, at the outer factice for filling of Loose tube and coated embossing steel band, steel band both sides parallel steel wire is strengthened, coated oversheath and forming again, this structured light cable structure is complicated, and causing the diameter of optical cable comparatively large, is also consumes more urban duct space laying.
Fibre ribbon is 4 ~ 24 optical fiber Boping bands be solidified into through UV arranged in parallel.Therefore, the bending of fibre ribbon has directivity, and along the good bandability in ribbon thickness direction, the bendability along ribbon width direction is poor.In order to improve the bending property of fibre ribbon, abroad when secondary coating, fibre ribbon is used to rotate to a direction, i.e. fibre ribbon spiral strand technology.Therefore the difficulty that accurately controls of technological parameter is large, requires high, must use the production equipment of complex precise to production equipment, and cause equipment investment large, production cost is high.
Summary of the invention
The problem that the invention will solve is to provide a kind of Full-dry optical fiber band optical cable, be particularly useful for the optical cable laid in pipeline, improve the bending property of fibre ribbon, and without the need to increasing other fluid material water-proof material in forming process, simplify traditional technological process.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of Full-dry optical fiber band optical cable, and comprise at least one fibre ribbon, described fibre ribbon is arranged in fiber matrix;
Xsect is circular sheath, and be provided with the rectangular longitudinal chamber of departing from its center line in described sheath, described fiber matrix is placed in described rectangular longitudinal chamber, and both 4 sides are corresponding;
Article two, waterstop, lays along two relative radial side in described fiber matrix, and is filled between the radial side of described fiber matrix and the inwall in rectangular longitudinal chamber;
Metallic strength member, is arranged in described sheath, and described metallic strength member is arranged in the center line in described rectangular longitudinal chamber and the determined plane of center line of described sheath, and the center line of itself and sheath is positioned at the homonymy in described rectangular longitudinal chamber.
Wherein, in order to complete coated described fiber matrix, the width of described waterstop is greater than the width 3.0mm ~ 5.0mm of described fiber matrix, and all leaves the gap of 0.3mm ~ 0.5mm between two of described waterstop lateral edges and the inwall in described rectangular longitudinal chamber.Waterstop wider than fiber matrix expands after absorbing water, can be full of the whole gaps in fiber matrix and rectangular longitudinal chamber, play the effect comprehensively blocked water; And the gap between waterstop and rectangular longitudinal chamber when waterstop does not absorb water as the space that fibre ribbon is bending, then for the expansion of waterstop provides space after waterstop water suction.
Wherein, in order to avoid the skewness of sheath each position, the inwall in the rectangular longitudinal chamber that described metallic strength member distance is adjacent is 5mm ~ 8mm.Metallic strength member and rectangular longitudinal chamber be oppositely arranged the uniform thickness that ensure that sheath, prevent from, because both hypotelorisms cause the side of sheath blocked up, affecting the bending property of optical cable.
Wherein, described waterstop is imbibition shaped material, and it is made up of base band and high power water-absorbing bisque.Expand after absorbing water to prevent water from soaking fibre ribbon.
The invention also provides a kind of forming method of Full-dry optical fiber band optical cable, comprises the following steps:
S1. the fibre ribbon of requirement is sent in fibre ribbon collecting device by ribbon pay-off device; Fibre ribbon is arranged as fiber matrix by fibre ribbon collecting device, and is sent to by fiber matrix in waterstop actinobacillus device; Two waterstops are laid along the radial side that described fiber matrix two is relative by waterstop actinobacillus device respectively, and are sent in shaping equipment by the fiber matrix being coated with waterstop; The two is sent in sheath device after fiber matrix and waterstop are arranged sizing by shaping equipment;
S2. the head place of sheath device is provided with jacket mould, jacket mould comprises core rod and die cap that is concentric and that cover in its outlet, core rod is provided with melt chamber at the place of covering with die cap, melt-flow material for formed protective sleeve continues to add in melt chamber, the fiber matrix being coated with waterstop passes the inner chamber of core rod and passes from the rectangular outlet departing from core rod center line, strengthening core passes the strengthening core through hole in core rod and passes, strengthening core through hole is positioned at by rectangular outlet center line and the determined plane of core rod center line, and be positioned at the homonymy of rectangular outlet with core rod center line, the synchronized transmission of fiber matrix, waterstop and strengthening core, three touches melt-flow material in the exit of core rod, and melt-flow material forms sheath, and three is coated, and forms the rectangular longitudinal chamber of parcel fiber matrix and waterstop within it,
S3. adopt the method that pull-tube type is coated, pulled out by fiber matrix, waterstop and the strengthening core round exit from die cap, the outside of three is coated with the melt-flow material of solid solution, through the restriction of round exit, the conglobate structure optical cable of shape, after water-cooling groove cooling, optical cable is shaping.
Wherein, well-balanced in order to ensure the distribution in sheath of strengthening core and rectangular longitudinal chamber, the edge of the rectangular outlet that the strengthening core through hole distance in S2 is adjacent is 5mm ~ 8mm.Thus avoid the stress that jacket thickness inequality causes when using single strengthening core to concentrate.
Wherein, the rectangular outlet of described core rod and strengthening core through hole are all positioned at the orthogonal projection region of round exit on core rod outlet on described die cap.This is conducive to the shaping of structure optical cable in S3, avoids its bending jacket thickness that causes in forming process uneven.
Wherein, described core rod is about by the determined plane symmetry of the center line of its center line and rectangular outlet thereof.Which ensure that shaping after optical cable in sheath, fiber matrix, waterstop and strengthening core all about this plane symmetry, compound with regular structure, each several part stress equilibrium.
Wherein, the exit of described melt chamber is provided with the square excessive rib be connected with 4 angles of described rectangular outlet respectively, and matches with the round exit of described die cap and the excessive rib of circle connected with described square excessive rib.Square excessive rib and the excessive rib of circle contribute to shunting melt-flow material.
Wherein, described melt-flow material is LSOH anti-flaming material.
The advantage that the invention has and good effect are:
1, single strengthening core is in conjunction with the structural design in eccentric rectangular longitudinal chamber, ensure that the uniform thickness of sheath, avoids sheath stress concentrate and ftracture; Single strengthening core is allowed in bending radius at fibre ribbon, makes the bending property of optical cable better, avoids owing to arranging many strengthening cores, causes jacket thickness uneven and the bending crack that brings;
2, the method adopting pull-tube type coated, disposal molding is built-in with the rectangular longitudinal chamber of fiber matrix and waterstop, compared with existing central beam tube type structure, in production technology, eliminates secondary coating, more without the need to the stranded equipment of fibre ribbon spiral;
3, the use of waterstop, avoid as the fluid material water-proof materials such as fine cream, cable cream use, reduce environmental pollution;
4, cable configuration is simple, and external diameter is little, and when laying, shared pipeline space is little, and circular optical cable is particularly useful for the pipeline space in city;
5, sheath adopts LSOH anti-flaming material, can indoor and outdoor general.
Accompanying drawing explanation
Fig. 1 is the cross-sectional cut-away schematic diagram of optical fibre band optical cable in the invention
Fig. 2 is the outlet schematic front view of core rod used in the invention
Fig. 3 is the longitudinal section cross-sectional schematic of core rod used in the invention
Fig. 4 is schematic front view and the schematic side view of die cap used in the invention
Fig. 5 is the flow sheet of optical cable forming method in the invention
In figure: 1-strengthening core, 2-waterstop, 3-fiber matrix, 4-sheath, 5-core rod, the circular excessively rib of 6-, 7-rectangular outlet, 8-strengthening core through hole, the square excessive rib of 9-, 10-ribbon pay-off device, 11-fibre ribbon collecting device, 12-waterstop actinobacillus device, 13-shaping equipment, 14-provides melting PE materials device and mould, 15-cold rinse bank, 16-measuring apparatus of diameter, bulge detection instrument and draw-gear, 17-optical cable finished product take-up, 18-rectangular longitudinal chamber
Embodiment
Elaborate below in conjunction with the specific embodiment of accompanying drawing to the invention.
As shown in Figure 1, this Full-dry optical fiber band optical cable, comprises at least one fibre ribbon, and described fibre ribbon is arranged in fiber matrix 3, and the fibre bundle quantity of every root fibre ribbon is 6 ~ 24 cores; Xsect is circular sheath 4, the rectangular longitudinal chamber 18 of departing from its center line is provided with in sheath 4, fiber matrix is placed in rectangular longitudinal chamber 18, and both 4 sides are corresponding, namely keeps each side to be set-located abreast and fiber matrix 3 does not contact with the inwall in rectangular longitudinal chamber 18; Article two, waterstop 2, lays along two relative radial side in fiber matrix 3, and is filled between the radial side of fiber matrix 3 and the inwall in rectangular longitudinal chamber 18; Metallic strength member 1, metallic strength member 1 is arranged in sheath 4, and it is positioned in the center line in rectangular longitudinal chamber 18 and the determined plane of center line of sheath 4, and the center line of itself and sheath 4 is positioned at the homonymy in rectangular longitudinal chamber 18.
Waterstop 2 is imbibition shaped material, and it is made up of base band and high power water-absorbing powder, is all filled up in the space between fiber matrix 3 and rectangular longitudinal chamber 18 after absorbing water, to stop water soaking fibre ribbon.Preferably, the width of waterstop 2 is greater than the width 3.0mm ~ 5.0mm of fiber matrix 3, and two of waterstop 2 gaps all leaving 0.3mm ~ 0.5mm between lateral edges and the inwall in rectangular longitudinal chamber 18.The space up and down for expanding of waterstop 2 is very little; and two of waterstop 2 lateral edges are wider than fiber matrix 3; therefore two lateral edges expands along the space between fiber matrix 3 and rectangular longitudinal chamber 18 after absorbing water; thus can be also coated by two sides that fiber matrix 3 is originally exposed, protect fiber matrix 3 all sidedly.And waterstop 2 is not when expanding, the gap between itself and rectangular longitudinal chamber 18 then provides space for it is bending.
Single piece of metal strengthening core 1 is arranged on the side of fiber matrix 3, allow in bending radius at fibre ribbon, make the bending property of optical cable better, avoid owing to arranging many strengthening cores, cause sheath 4 uneven thickness and the bending crack brought, and, can according to the orientation of the cross-sectional view fiber matrix 3 of optical cable time bending, preferably along its thickness direction bending metals strengthening core.For the uneven thickness avoiding eccentric rectangular longitudinal chamber 18 and single piece of metal strengthening core 1 to cause sheath, preferably, the inwall in the rectangular longitudinal chamber 18 that metallic strength member 1 distance is adjacent is 5mm ~ 8mm, although the two can not realize symmetrically, but reasonably spacing can ensure the stress equilibrium of sheath, avoid it to ftracture, and the bending property of optical cable is better.
Additionally provide a kind of forming method of Full-dry optical fiber band optical cable in another embodiment of the invention, comprise the following steps:
S1. the fibre ribbon of requirement is sent in fibre ribbon collecting device 11 by ribbon pay-off device 10, and the quantity of fibre ribbon is preferably 12; Fibre ribbon is arranged as fiber matrix 3 by fibre ribbon collecting device 11, and delivers in waterstop actinobacillus device 12 by fiber matrix biography 3; Two waterstops 2 are laid along the radial side that fiber matrix 3 two is relative by waterstop actinobacillus device 12 respectively, and are sent in shaping equipment 13 by the fiber matrix 3 being coated with waterstop 2; The two is sent in sheath device 14 after fiber matrix 3 and waterstop 2 are arranged sizing by shaping equipment 13;
S2. the head place of sheath device 14 is provided with jacket mould, jacket mould comprises core rod 5 and die cap that is concentric and that cover in its outlet, core rod 5 is provided with melt chamber at the place of covering with die cap, melt-flow material for formed protective sleeve 4 continues to add in melt chamber, the fiber matrix 3 being coated with waterstop 2 passes the inner chamber of core rod 5 and passes from the rectangular outlet 7 departing from core rod center line, strengthening core passes the strengthening core through hole 8 in core rod 5 and passes, strengthening core through hole 8 is positioned at by rectangular outlet 7 center line and the determined plane of core rod 5 center line, and be positioned at the homonymy of rectangular outlet 7 with core rod 5 center line, fiber matrix 3, waterstop 2 and the synchronized transmission of strengthening core 1, three touches melt-flow material in the exit of core rod 5, melt-flow material forms sheath 4, and three is coated, and form the rectangular longitudinal chamber 18 of parcel fiber matrix 3 and waterstop 2 within it, to form the speed relative to melt-flow material in core rod exit by the motion of the tractive of fiber matrix 3, by this traction force, melt-flow material tractive is gone out the rectangular longitudinal chamber 18 of the shape identical with rectangular outlet 7,
S3. pulled out by fiber matrix 3, waterstop 2 and strengthening core 1 round exit from die cap, which is that pull-tube type is coated, and the outside of three is coated with the melt-flow material of solid solution, through the restriction of round exit, the conglobate structure optical cable of shape, after water-cooling groove 15 cools, optical cable is shaping.
Last measure 16 through measuring apparatus of diameter, bulge detection instrument again, and be sent in optical cable finished product take-up 17 and compile, the traction force in forming process is provided by draw-gear.
Fig. 5 shows the flow sheet of above-mentioned forming method; core rod 5 wherein in sheath device 14 and the structure of die cap are shown in Fig. 2 ~ 4; the two center line of jacket mould protection; the center line a of rectangular outlet in the center line b of core rod 5 and die cap and core rod respectively; jacket mould is about by two determined plane symmetry of center line; namely strengthening core through hole 8 in core rod 5 is arranged on this plane; preferably, the edge of the rectangular outlet that strengthening core through hole 8 distance in S2 is adjacent is 5mm ~ 8mm.Thus avoid the stress that sheath 4 uneven thickness causes when using single strengthening core to concentrate.
In an embodiment of the invention, the rectangular outlet 7 of core rod 5 and strengthening core through hole 8 are all positioned at the orthogonal projection region of round exit on core rod outlet on die cap.This is conducive to the shaping of structure optical cable in S3, avoids its bending jacket thickness that causes in forming process uneven.
In an embodiment of the invention, the exit of melt chamber is provided with the square excessive rib 9 be connected with 4 angles of rectangular outlet 7 respectively, and matches with the round exit of die cap and the excessive rib 6 of circle connected with square excessive rib 9.Circular excessively rib 6 and core rod 5 and die cap concentric, the outlet of melt chamber is divided into 4 outlets by 4 square excessive ribs 9 and circular excessive rib 5, and square excessive rib 9 and the excessive rib 6 of circle contribute to shunting melt-flow material.Melt-flow material through core rod 5 and die cap, by the rectangular longitudinal chamber 18 of disposable formation built-in fiber matrix 3 with waterstop 2, and the melt-flow material coated single strengthening core 1 simultaneously in fibre ribbon side, formed in the invention without sleeve pipe Full-dry optical fiber band optical cable.
Preferably, melt-flow material is LSOH anti-flaming material, and the sheath after namely shaping is LSOH anti-flaming material.
Above an embodiment of the invention has been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalization changes done according to the invention application range with improve, within the patent covering scope that still all should belong to the invention.
Claims (5)
1. a Full-dry optical fiber band optical cable, is characterized in that: comprise
At least one fibre ribbon, described fibre ribbon is arranged in fiber matrix (3);
Xsect is circular sheath (4), the rectangular longitudinal chamber (18) of departing from its center line is provided with in described sheath (4), described fiber matrix (3) is placed in described rectangular longitudinal chamber (18), and both 4 sides are corresponding;
Article two, waterstop (2), lays along two relative radial side in described fiber matrix (3), and is filled between the radial side of described fiber matrix (3) and the inwall of rectangular longitudinal chamber (18);
Metallic strength member (1), be arranged in described sheath (4), described metallic strength member (1) is arranged in the center line of described rectangular longitudinal chamber (18) and the determined plane of center line of described sheath (4), and the center line of itself and sheath (4) is positioned at the homonymy of described rectangular longitudinal chamber (18).
2. optical fibre band optical cable according to claim 1, it is characterized in that: the width of described waterstop (2) is greater than the width 3.0mm ~ 5.0mm of described fiber matrix (3), and all leave the gap of 0.3mm ~ 0.5mm between two lateral edges of described waterstop (2) and the inwall in described rectangular longitudinal chamber (18).
3. optical fibre band optical cable according to claim 1, is characterized in that: the inwall in the rectangular longitudinal chamber (18) that described metallic strength member (1) distance is adjacent is 5mm ~ 8mm.
4. optical fibre band optical cable according to claim 1, is characterized in that: described waterstop (2) is made up of base band and high power water-absorbing bisque.
5. optical fibre band optical cable according to claim 1, is characterized in that: described sheath (4) adopts LSOH anti-flaming material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420469662.9U CN204044409U (en) | 2014-08-19 | 2014-08-19 | A kind of Full-dry optical fiber band optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420469662.9U CN204044409U (en) | 2014-08-19 | 2014-08-19 | A kind of Full-dry optical fiber band optical cable |
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| CN204044409U true CN204044409U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420469662.9U Expired - Fee Related CN204044409U (en) | 2014-08-19 | 2014-08-19 | A kind of Full-dry optical fiber band optical cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104252022A (en) * | 2014-08-19 | 2014-12-31 | 天津长飞鑫茂光缆有限公司 | All-dry fiber ribbon optical cable and molding method thereof |
| EP3467560A4 (en) * | 2016-05-24 | 2020-01-15 | Fiberhome Telecommunication Technologies Co., Ltd | All-dry optical fiber ribbon loose tube and manufacturing method thereof |
-
2014
- 2014-08-19 CN CN201420469662.9U patent/CN204044409U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104252022A (en) * | 2014-08-19 | 2014-12-31 | 天津长飞鑫茂光缆有限公司 | All-dry fiber ribbon optical cable and molding method thereof |
| CN104252022B (en) * | 2014-08-19 | 2017-03-22 | 天津长飞鑫茂光缆有限公司 | All-dry fiber ribbon optical cable and molding method thereof |
| EP3467560A4 (en) * | 2016-05-24 | 2020-01-15 | Fiberhome Telecommunication Technologies Co., Ltd | All-dry optical fiber ribbon loose tube and manufacturing method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20200819 |
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| CF01 | Termination of patent right due to non-payment of annual fee |