CN2775694Y

CN2775694Y - Optical fiber to user cut-in optical cable

Info

Publication number: CN2775694Y
Application number: CN 200520016119
Authority: CN
Inventors: 张莉; 许人东; 王新生; 张颖超; 王文昌
Original assignee: BEIJING CORNING OPTICAL FIBER CABLE Co Ltd
Current assignee: BEIJING CORNING OPTICAL FIBER CABLE Co Ltd
Priority date: 2005-04-12
Filing date: 2005-04-12
Publication date: 2006-04-26
Anticipated expiration: 2015-04-12

Abstract

The utility model relates to an optical cable, particularly an optical fiber to user cut-in optical cable. The utility model is characterized in that the periphery of a central beam tube wrapped in a sheath is provided with reinforcing units and a water-blocking fiber yarn respectively, wherein the reinforcing units are tangent to the periphery of the central beam tube, and the water-blocking fiber yarn is arranged at both sides of a tangential point of the reinforcing units and the central beam tube; at least two reinforcing units are uniformity laid and tangent to the periphery of the central beam tube. Because the periphery of the central beam tube is provided with more than two reinforcing units, the user cut-in optical cable implemented according to the scheme can obviously enhance the protective action of the optical cable withstanding pull force and compression force. The water-blocking fiber yarn and medium factice can cause the optical cable to have waterproof property of total cross section. The utility model has the characteristics of favorable mechanical property and environmental adaptability and low cost, and is suitable for overhead installation, pipelines and direct burying and laying.

Description

Fiber to the home inserts optical cable

Technical field

The utility model relates to optical cable, and especially a kind of Fiber to the home inserts optical cable.

Background technology

Optical cable is the passage of transmitting optical signal, generally is divided into layer-twisted type and central beam tube type by structure.With the beam tube type cable is example, and mostly the composition of its inner structure is by outer protective sleeve center beam tube, water blocking layer, reinforcement unit pack to be wrapped in wherein, form optical cable important document---optical fiber then places in the center beam tube that has been full of medium oil.Wherein, water blocking layer is mainly used in waterproof; Strengthen the unit then mainly in order to resistance to compression and support optical cable; Medium oil in the beam tube is similarly wherein trickle optical fiber of protection and waterproof.This conventional optical cable is many to be laid in order to main line.And be equipped with a great difference to the construction conditions and the main line of family optical cable; To the number of fibers of family optical cable less (how below 10 cores), use length shorter, but access conditions is complicated, need optical cable can adapt to make somebody a mere figurehead, pipeline and direct-burried.If be used for inserting optical cable to the family with this trunk cable, because of the fiber number that wherein contains much larger than actual needs, so, certainly will cause waste and increase material cost virtually.Secondly, the compressive property of existing optical cable and the index request that lightning-arrest effect all can not adapt to the family optical cable fully.

The utility model content

The purpose of this utility model is to disclose to insert optical cable to the family between a kind of end office (EO) that is used to connect optical-fiber network or node and the user.This optical cable adopts following technical scheme; It is a kind of that Fiber to the home inserts optical cable, comprise sheath, center beam tube and optical fiber, water blocking layer, reinforcement unit, the beam tube periphery, center that it is characterized in that being wrapped in the sheath is equipped with the reinforcement unit and the silvalin that blocks water respectively, strengthen the unit and be tangential on beam tube periphery, center, the silvalin that blocks water places the both sides of strengthening unit and center beam tube points of tangency; Strengthen even laying the in unit and be tangential on beam tube periphery, center, its number is no less than 2, strengthens unit for 2 and is divided into the peripheral both sides of center beam tube and tangent with it, and the section of sheath is a pancake that carries over two reinforcement unit and the tangent long axis direction of center beam tube; Strengthen the unit for 3 and evenly be laid in beam tube periphery, center and tangent with it, the section of sheath is circular; Strengthen the unit for 4 and evenly be laid in beam tube periphery, center and tangent with it, the section of sheath is circular.

Insert optical cable by what such scheme was implemented to the family; because of having put the reinforcement unit more than 2 in center beam tube outer periphery; more significantly improved optical cable and born tension and measuring body protective effect, and block water silvalin and medium ointment more make optical cable have the water resistance of total cross-section.The utlity model has favorable mechanical performance and environmental suitability, and built on stilts, pipeline with low cost and suitable, the direct-burried characteristics of laying.

Description of drawings

Fig. 1 is inner structure of the present utility model and schematic appearance;

Fig. 2 is the section structure synoptic diagram of a kind of embodiment;

Fig. 3 is the section structure synoptic diagram of the 2nd kind of embodiment;

Fig. 4 is the section structure synoptic diagram of the 3rd kind of embodiment.

Embodiment

Be further described in detail in conjunction with the accompanying drawings.The embodiment of Fig. 2 all is arranged with 2 reinforcement unit 4 by nonmetallic materials system in the both sides of center beam tube 3 peripheries, also promptly 2 strengthen unit 4 and be divided into the both sides of center beam tube 3 diameter extended lines and tangent with the periphery, strengthen the 4 pairs of optical cables in unit for 2 and played the good supporting effect.Be of the vertical infiltration of anti-sealing along optical cable, lay 4 silvalins 2 that block water respectively in center beam tube 3 and the both sides of strengthening unit 4 points of tangency, wherein, silvalin 2 and reinforcement unit 4 and the center beam tube 3 tangent situations of blocking water then are optimal setting (as shown in Figure 2), also can be nontangential side settings.The silvalin 2 that blocks water that contains material water-proof material system is in case chance water promptly expands and with alternate therewith gap closing, not only effectively played waterproof action, and optical cable has been increased the dynamics of tension.Plastic section is that pancake sheath 1 is wrapped in center beam tube 3, reinforcement unit 4 and the silvalin 2 that blocks water wherein.Reinforcement unit number set in the sheath is many more, and the tension of its optical cable and compressive strength also increase thereupon and improves.

Fig. 3 and Fig. 4 are respectively other two kinds of embodiment, and Fig. 3 is that the peripheral of center beam tube 3 evenly laid 3 reinforcement unit 4, and the region of interest between said two devices is laid 6 silvalins 2 that block water simultaneously, and the section of sheath 1 is circular.Fig. 4 evenly lays 4 reinforcement unit 4 at the peripheral of center beam tube 3, and the region of interest between said two devices is laid 8 silvalins 2 that block water simultaneously, and the section of sheath 1 also is circular.

In the accompanying drawing, 6 is optical fiber, is suspended among the ointment 5 with waterproofing protection effect.Because optical cable of the present utility model is that nonmetallic materials are made, therefore, not only can in the environmental area of highfield, magnetic field and many thunders, use, and above-mentioned well-formed's assurance signal transmission quality.

Claims

It is 1, a kind of that Fiber to the home inserts optical cable, comprise sheath, center beam tube and optical fiber, water blocking layer, reinforcement unit, the beam tube periphery, center that it is characterized in that being wrapped in the sheath is equipped with the reinforcement unit and the silvalin that blocks water respectively, strengthen the unit and be tangential on beam tube periphery, center, the silvalin that blocks water places the both sides of strengthening unit and center beam tube points of tangency.
2, described Fiber to the home inserts optical cable by claim 1, it is characterized in that strengthening the unit and evenly lay and be tangential on beam tube periphery, center, and its number is no less than 2.
3, by claim 1 or 2 described Fiber to the home inserts optical cable, it is characterized in that 2 are strengthened the parallel peripheral both sides of center beam tube and tangent with it that are divided into, unit, the section of sheath is a pancake that carries over two reinforcement unit and the tangent long axis direction of center beam tube.
4, by claim 1 or 2 described Fiber to the home inserts optical cable, it is characterized in that 3 are strengthened unit evenly to be laid in the center beam tube peripheral and tangent with it, the section of sheath be a circle.
5, by claim 1 or 2 described Fiber to the home inserts optical cable, it is characterized in that 4 are strengthened unit evenly to be laid in the center beam tube peripheral and tangent with it, the section of sheath be a circle.