A kind of composite bed stranded cables
Technical field
The utility model relates to and a kind ofly is used to communicate by letter and the composite bed stranded cables of field of information transmission.
Background technology
Along with the develop rapidly of communication information industry, the demand of big core being counted optical cable grows with each passing day.Existing layer-stranding cable, its structure be stranded many loose sleeve pipes around central reinforce member normally, place the optical fiber by blue, orange, green, brown, grey, white, red, black, yellow, purple, powder, dark green 12 chromatic colorants in the loose sleeve pipe again.For layer-stranding cable, if stranded 6 sleeve pipes around the filling member of center, stranded again 12 sleeve pipes of cable core skin after stranded, 12 optical fiber in the every sleeve pipe, cable configuration is 18 cellular constructions, this moment, the core number of optical cable was 216 cores, and this is the limit core number that existing layer-stranding cable structure can be accomplished.And such core number has been difficult to satisfy the actual demand of using in some occasion.Therefore, count optical cable for big core, one selects central tubular band cable or skeleton band cable for use, but because the fine quality of production of band requires high in the band cable, and the fine mechanical property of band is not so good as discrete optical fiber, band fibre in the band cable is easy to the influence that is subjected to pulling force or is subjected to twisting resistance and the transmission performance and the serviceable life of reducing optical fiber, also exists optical fiber and carrying device comparatively expensive simultaneously, the unmanageable problem of technology in the production run.
Summary of the invention
Technical problem to be solved in the utility model is to propose a kind of composite bed stranded cables at the deficiency of above-mentioned prior art existence, and it can not only improve the core number of the discrete optical fiber in the layer-stranding cable greatly, and is easy to processing, and production cost is low.
The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: the oversheath that includes cable core and coating cable core, it is characterized in that described cable core comprises central reinforce member and is stranded in central reinforce member cable core subelement on every side, described cable core subelement comprises subcenter spare and the loose sleeve pipe mutually stranded with subcenter spare, stranded loose sleeve pipe periphery is wound with the bundle yarn, is laid with optical fiber in the loose sleeve pipe.
Press such scheme, described cable core subelement is provided with 4~18.
Press such scheme, loose sleeve pipe is set to 4~18 in the described cable core subelement; Stranded in the cable core subelement have a gasket for packing.
Press such scheme, subcenter spare in described each cable core subelement or bundle yarn vary in color.
Press such scheme, the core number of optical fiber is 2~12 cores in the described every loose sleeve pipe, is filled with fine cream in the loose sleeve pipe.
Press such scheme, described optical fiber is the thin diameter optical fiber of discrete, and the diameter of thin diameter optical fiber is 125 μ m~230 μ m.
Press such scheme, the described cable core subelement that is stranded in around the central reinforce member is 1~2 layer.
Press such scheme, between cable core and oversheath, can hold strapping or coat water blocking layer.
Press such scheme, vertical bag metal tape is set between cable core and oversheath.
The beneficial effects of the utility model are: 1, compound layer-twisted type structure of the present utility model, improved discrete optical fiber collection dress density in the optical cable greatly, the fiber number of having broken through the existing layer stranded cables of arranging by standard colour chart is the restriction of 216 cores to the maximum, with the stranding stranding machine that has 12 pay off racks is example, if produce 18 * 18 cellular constructions, maximum fiber core number can be accomplished 3888 cores in theory; 2, adopt small diameter fiber can further improve the optical fiber collection dress density of optical cable; 3, the utility model adds the requirement that can reduce man-hour stranding equipment pay off rack quantity, reduces and counts the scrap build cost of the required increase of optical cable because of producing big core, thereby be easy to processing, and production cost is low.
Description of drawings
The radial structure sectional view of first embodiment of Fig. 1 the utility model.
The radial structure sectional view of second embodiment of Fig. 2 the utility model.
Embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
First embodiment as shown in Figure 1, this cable core structure is Unit 5 * 5, include the oversheath 9 of cable core and coating cable core, cable core comprises central reinforce member 4 and is stranded in central reinforce member cable core subelement on every side, described cable core subelement comprises subcenter spare 2 and the 5 piece loose sleeve pipes 5 mutually stranded with subcenter spare, 5 stranded loose sleeve pipe peripheries are wound with pricks yarn 6, is placed with 12 optical fiber 1 in the loose sleeve pipe and is filled with fine cream 3, forms 1 cable core subelement thus; And then it is 5 such cable core subelements is stranded around central reinforce members 4 and form cable core.Between cable core and oversheath and in each cable core subelement gap, all be filled with material water-proof material 7, cable core is outer can to coat the vertical bag of one deck metal tape 8, central reinforce member 4 can be FRP or steel wire or cover plastic-steel silk, and subcenter spare 2 is the FRP that varies in color or the cover plastic-steel silk of different colours.Fiber number in the present embodiment optical cable can reach 300 cores.
Second embodiment as shown in Figure 2, this cable core structure is Unit 6 * 6, the difference of it and a last embodiment is: cable core includes 6 subelements, and subelement is stranded in together by 5 loose sleeve pipes 5 and 1 gasket for packing 10 around the subcenter spare 2, and other structures are identical with a last embodiment.