The dry type optical cable is used in the building wiring
Technical field
The utility model relates to a kind of central beam tube type optical fiber ribbon cable, especially relates to a kind of building wiring with dry type center beam tube ribbon optical cable.
Background technology
Present normally used optical fiber ribbon cable all is to use ointment to block water, and in the cable connection process, is difficult to clean out ointment; And optical cable lays in piping shaft for a long time; Because the effect of pressure can cause ointment drip in the loose sleeve pipe, make dirty equipment or contaminated environment.Therefore, when optical fiber ribbon cable is used in wiring in the design building, just need a kind of ointment that do not use, and adopt the dry type material water-proof material to replace the central beam tube type optical fiber ribbon cable of ointment.
Summary of the invention
The purpose of the utility model provides a kind of dry type optical cable that is applicable to the building wiring.
For achieving the above object, the technical scheme that the utility model adopts is:
The dry type optical cable is used in a kind of building wiring; Comprise fiber unit, be coated on the protective layer of described fiber unit periphery, described fiber unit comprises optical fibre set, be arranged at the outer field dry type material water-proof material of described optical fibre set, coat the loose sleeve pipe of described optical fibre set and described dry type material water-proof material.
Preferably, described dry type material water-proof material is powdery or yarn shape material water-proof material.
Preferably, described dry type material water-proof material constitutes some water baffle bars, and longitudinally is arranged at the periphery of described optical fibre set.
Preferably, described water baffle bar evenly is arranged in the periphery of described optical fibre set.
Preferably, described water baffle bar is four.
Preferably, the cross section of described water baffle bar is circular.
Preferably, described optical fibre set comprises the some multi-core fiber bands that are superimposed with each other and are provided with, and every described multi-core fiber band comprises many single fibers.
Preferably, described multi-core fiber band is the 1-18 root, and every described multi-core fiber band comprises that the quantity of described single fiber is 4 or 6 or 8 or 12 or 24.
Preferably, described single fiber comprises the resin bed of colored optical fiber, the described colored optical fiber of coating.
Preferably, described protective layer comprises the non-metal reinforced layer that coats described fiber unit, the oversheath that is coated on the periphery of described non-metal reinforced layer.
Because technique scheme utilization, the utility model compared with prior art has advantage: because the utility model adopts the dry type material water-proof material to replace ointment, make in the construction more conveniently and clean when fibre junction, do not pollute the environment.
Description of drawings
Accompanying drawing 1 is the schematic cross-section of the building wiring of the utility model with the dry type optical cable.
In the above accompanying drawing: 1, fiber unit; 11, optical fibre set; 111, single fiber; 1111, colored optical fiber; 1112, resin bed; 12, water baffle bar; 13, loose sleeve pipe;
2, protective layer; 21, non-metal reinforced layer; 22, oversheath.
Embodiment
Below in conjunction with embodiment shown in the drawings the utility model is further described.
Embodiment one: shown in accompanying drawing 1.
It is circular that dry type optical cable, profile are used in a kind of building wiring, and it comprises fiber unit 1, is coated on the protective layer 2 of fiber unit 1 periphery.
Fiber unit 1 comprises optical fibre set 11, is arranged at the loose sleeve pipe 13 of optical fibre set 11 outer field dry type material water-proof materials, clad optical fiber group 11 and dry type material water-proof material.
Optical fibre set 11 comprises the some multi-core fiber bands that are superimposed with each other and are provided with, and every multi-core fiber band comprises many single fibers 111.Single fiber 111 comprises colored optical fiber 1111, coats the resin bed 1112 of colored optical fiber 1111.The multi-core fiber band is the 1-18 root, and every multi-core fiber band comprises that the quantity of single fiber 111 is 4 or 6 or 8 or 12 or 24.Colored optical fiber 1111 is distinguished with various colors respectively, and the multi-core fiber band is distinguished with the coding lettering.In the present embodiment, the multi-core fiber band is 12, and every multi-core fiber band comprises 12 single fibers 111, therefore constitutes 144 core fibre groups 11.
The dry type material water-proof material is powdery or yarn shape material water-proof material, and it constitutes some cross sections is circular water baffle bar 12, and longitudinally is arranged at the periphery of optical fibre set 11.In the present embodiment, four water baffle bars 12 are set, evenly are arranged in the periphery of optical fibre set 11.Water baffle bar 12 plays resistance effect on the one hand, more convenient in cable connection on the one hand, clean and environmental protection.
Pine sleeve pipe 13 adopts the PVC material of ultralow contraction to process, and on the one hand fibre ribbon 11 is played the mechanical protection effect, solves surplus long problem on the one hand.
The formation of fiber unit 1 can be put into the multi-core fiber band and vertically placed when vertically extruding loose sleeve pipe 13 water baffle bar 12.
Protective layer 2 comprise clad optical fiber unit 1 non-metal reinforced layer 21, be coated on the oversheath 22 of the periphery of non-metal reinforced layer 21.Non-metal reinforced layer 21 is mainly used in the tensile property that strengthens optical cable, will select suitable mould during vertical the bag, makes cable configuration compact.Also outside non-metal reinforced layer 21, extrude the oversheath 22 that one deck is processed by low smoke and zero halogen material or tygon in the time of vertical the bag, its thickness is about 2mm.Because this kind optical cable is to be used for the building wiring, oversheath 22 plays the mechanical protection effect to cable core on the one hand, improves the lateral pressure resistant performance, has fire resistance on the one hand.
The foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection domain of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the utility model.