CN1013003B - Waterproof cable - Google Patents
Waterproof cableInfo
- Publication number
- CN1013003B CN1013003B CN 88107073 CN88107073A CN1013003B CN 1013003 B CN1013003 B CN 1013003B CN 88107073 CN88107073 CN 88107073 CN 88107073 A CN88107073 A CN 88107073A CN 1013003 B CN1013003 B CN 1013003B
- Authority
- CN
- China
- Prior art keywords
- filled
- spacer rod
- optical fiber
- fiber cable
- sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Communication Cables (AREA)
Abstract
One or more optical fibers are slackly put into grooves formed along a positioning isolating rod in a water-proof optic fiber cable, and a plurality of filled sections are formed by filling jelly glue materials at preset intervals in each of the grooves to alternately generate filled sections and unfilled sections. Moisture-proof powder mixtures a be filled in between two adjacent filled sections, namely each space in the unfilled sections, and in this way, the present invention provides a full-filled type optic fiber cable. The moisture-proof powder mixtures are sealed by the jelly glue of the filled sections to make the moisture-proof powder mixtures fixed and to ensure uniform distribution of fillers.
Description
The invention relates to a kind of waterproof optical fiber cable that is used for communication system.
When fiber optic cables were installed in the seabed, cable was subjected to the tension of hydraulic pressure usually.For the optical fiber that prevents cable avoids excessively stretching owing to tension.Fiber optic cables are to make with a core or location spacer rod with a plurality of grooves, groove normally extends on the length direction of cable, and optical fiber is being placed in the said groove of relaxing in the manufacture process of cable, even so that the location spacer rod when the laying of cable and after be subjected to the tension of hydraulic pressure and expand, optical fiber is not subjected to tension force yet.In the fiber optic cables of above-mentioned pattern, location spacer rod groove separately is to be accompanied by with moistureproof or damp proof potpourri to put into optical fiber and fill, and feasible do not have the space, prevents the water absorptivity (hydrotaxis) along groove.As moistureproof mixed packing, can use powder filling material or frozen glue filling material usually.The powder filling material is used for preventing water absorptivity, but can not prevent the intrusion of sealing.On the other hand, ice glue filling material is more superior aspect the intrusion of waterproof.
, the location mode that the frozen glue in common fiber optic cables is filled shows one and causes the local shortcoming of curling of optical fiber, and is promptly so-called little curved.More precisely, when fiber optic cables were subjected to tension, by strong stretching, then when removing tension, the location spacer rod returned to its original length to optical fiber along with location spacer rod elongation.The recovery of location spacer rod makes optical fiber also return to original relaxed state.Reality is opposite, and as shown in Figure 1, because the big resistance of frozen glue filling material 101 makes location spacer rod 103 not restore fully, optical fiber 100 can not restore fully, local microbend 104 therefore occurred.
Impel the optical fiber life-span to reduce because the increase of bending stress, optical fiber produce microbend, it has also caused the increase of loss.
Other pattern that also has the known fiber optic cable, one of them is to fill as moistureproof filling material with railway grease, and another provides a kind of stopper of waterproof, and it is disclosed in (not examination) in the Japanese patent application, 6206,1981 years.They all do not solve the problem of the microbend of optical fiber recited above.
Another prior art of fiber optic cables is disclosed in (not examination) in the Japanese patent application, and 62207,1981 years, the optical fiber in groove was fixed on the location spacer rod that has predetermined space.The optical cable that is disclosed in the Japanese patent application book 1981 62207 is directly to prevent optical fiber motion in the vertical, therefore in this case, because optical fiber can not move, local tension or distortion are applied on the optical fiber, and optical fiber is subjected to tension and excessively stretches or distortion on local location.
In Chinese patent application CN-85101807 number, a kind of waterproof optical fiber cable is disclosed.
The basic purpose of above-mentioned application provides a kind of fiber optic cables that are used for communication system, can prevent concentrating and microbend fiber and prevent water absorptivity in fiber optic cables of slack.
Another purpose of above-mentioned application provides a kind of fiber optic cables of waterproof, and wherein the variation with respect to the loss of the slack of cable is little.
The present invention is the modified of above-mentioned application, the purpose of this invention is to provide the equally distributed full packing type of a kind of filling material waterproof optical fiber cable.
The invention provides a kind of waterproof optical fiber cable that is used for communication system, it comprises a location spacer rod device that extends, vertically comprise a groove at least along the location spacer rod, fiber device is lax puts into said groove, barrier material is inserted in the said groove with predetermined interval and is formed a plurality of filling parts, said interval be with respect to the location spacer rod vertical, a plurality of filled sections that replace and non-filled section are provided like this, and, the device that also has the outside surface of topped filled section does not form any air gap between the outside surface of filled section and topped device.
Fig. 1 is a side cross-sectional view, shows an example of the local bending that appears in the normal light fiber-optic cable.
Fig. 2 is a cross section view according to fiber optic cables embodiment of the present invention, and has inserted filling material.
Fig. 3 is a side view that is shown in the fiber optic cables of Fig. 2, has the external protection coating of exposure.
Referring to figs. 2 and 3, according to fiber optic cables of the present invention comprise one that make by the polyvinyl resin material and on xsect, have the extension location spacer rod 2 of round shape and have high bending strength stiffener 3, stiffener is by FRP(fibrous glass reinforced plastics) material makes, it is the core extension at location spacer rod 2, locatees spacer rod thus and is strengthened.Four grooves 4 are to be limited to symmetrically on the circumferential outer surface part of location spacer rod 2, and each groove 4 is extensions parallel to each other, and are spiral extensions along location spacer rod 2.Optical fiber 5 is installed in separately the groove 4 with uniform looseness.In each groove 4, fill, thereby formed many filled sections 6 with frozen glue shape polybutylene material, and in addition topped round the outside surface of location spacer rod 2.Said filled section 6 is discontinuous formation, but location spacer rod 2 vertically on arrange with proper spacing so that filled section 6 and non-filled section 8 replace mutually.
The wrapped non-braid over braid of location spacer rod 2 usefulness of aforesaid placement optical fiber 5 and filled section 6 is around it and toppedly cladding continuously around layer 9 of forming, and making does not have the space around it, thereby prevents separating of optical fiber 5 and filled section 6 and location spacer rod 2.The outer cladding sheath of being made by tygon 10 forms around topped covering 9, so that protection fiber optic cables 1.
As the frozen glue material of filled section 6, there are various materials to be used to and prevent absorptive material.For example, flexible glue, ointment, polybutylene frozen glue or petroleum jelly can be used as the packed layer material, and in this case, the flowability of frozen glue material increases in certain temperature range.Preferably use such material, its flowability is little in certain temperature range, and in this temperature range, fiber optic cables are used, so that suppress flowing of frozen glue material.
A method eliminating air-gap in filled section 6 is to form cladding 9 by the belt that porosint is made with the method for compacting to cause the frozen glue material of filled section 6 to be penetrated in the belt.Another method of eliminating air-gap in filled section 6 is to form the extra play of filling frozen glue on two surfaces of cladding 9.
In the present invention, it is each space in the non-filled section 8 that moistureproof mixture of powders can be filled between the adjacent filled section 6, so that a kind of fiber optic cables of full packing type are provided, therefore, the humidity resistance of this fiber optic cables will be good than common fiber optic cables many, in other words, the full packing type of common fiber optic cables has a shortcoming, be that packed density vertically is tending towards inhomogeneous with respect to cable, this is owing to carry and the vibration during cabling, thereby the humidity resistance of cable vertically is different along cable.
Antithesis, in the present invention, moistureproof mixture of powders is sealed with the frozen glue of filled section 6, thereby moistureproof mixture of powders can not be moved, and guarantees to make being evenly distributed of filling material.
Claims (4)
1, a kind of waterproof optical fiber cable that is used for communication system is characterized in that, this waterproof optical fiber cable comprises:
The one location spacer rod device that extends, this device that is formed have at least one groove along location spacer rod stretching, extension,
Loosely put into the fiber device of said groove,
Be filled in the said groove and a plurality of first filled sections that form by predetermined space longitudinally with moistureproof frozen glue material with respect to the location spacer rod,
Second filled section that forms with moistureproof powder material in the corresponding said interval between said first filled section,
Clad the device of the outside surface of first and second filled sections, between first filled section and cladding device, do not form any gap.
2,, it is characterized in that said location spacer rod device is to be strengthened by the stiffener that the core along location spacer rod device extends according to the waterproof optical fiber cable of claim 1 regulation.
3,, it is characterized in that said location spacer rod is to be formed by a plurality of grooves along the spiral form of locating the extension of spacer rod device according to the waterproof optical fiber cable of claim 1 regulation.
4,, it is characterized in that said cladding device is by forming around the twining package tape device of the outside surface of locating the spacer rod device by said filling device according to the waterproof optical fiber cable of claim 1 regulation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101807 CN1009391B (en) | 1985-04-01 | 1985-04-01 | Water proof cable and method of manufacture thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85101807 Division | 1985-04-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1042014A CN1042014A (en) | 1990-05-09 |
| CN1013003B true CN1013003B (en) | 1991-06-26 |
Family
ID=4792075
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88107073 Expired CN1013003B (en) | 1985-04-01 | 1985-04-01 | Waterproof cable |
| CN 85101807 Expired CN1009391B (en) | 1985-04-01 | 1985-04-01 | Water proof cable and method of manufacture thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85101807 Expired CN1009391B (en) | 1985-04-01 | 1985-04-01 | Water proof cable and method of manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN1013003B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008029488A1 (en) * | 2006-09-08 | 2008-03-13 | The Furukawa Electric Co., Ltd. | Optical fiber core and optical fiber tape core |
-
1985
- 1985-04-01 CN CN 88107073 patent/CN1013003B/en not_active Expired
- 1985-04-01 CN CN 85101807 patent/CN1009391B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1042014A (en) | 1990-05-09 |
| CN85101807A (en) | 1987-01-10 |
| CN1009391B (en) | 1990-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |