CN202049267U

CN202049267U - Flat loose tube optical fiber band communication optical cable

Info

Publication number: CN202049267U
Application number: CN2011201269163U
Authority: CN
Inventors: 李永刚; 高宪武; 周文; 宋来龙; 冯玉
Original assignee: SHANDONG TAIPINGYANG OPTICAL CABLE CO Ltd
Current assignee: SHANDONG TAIPINGYANG OPTICAL CABLE CO Ltd
Priority date: 2011-04-27
Filing date: 2011-04-27
Publication date: 2011-11-23
Anticipated expiration: 2021-04-27

Abstract

The utility model provides a flat loose tube optical fiber band communication optical cable. A plurality of optical fibers are parallelly pasted into an optical fiber band in the center of the optical cable, the optical fiber band and optical fiber paste are simultaneously placed into a polybutylece terephthalate (PBT) loose sleeve tube, a layer of aramid fiber yarns is uniformly and vertically placed at the circumference of the outer side of the PBT loose sleeve tube, then, a polrvinyl chloride sheath or a low-smoke halogen-free flame-retardant polyolefin sheath is extruded and coated on the periphery of the aramid fiber yarns, and finally, the cross section of the optical fiber is in a rectangular shape. Because a plurality of optical fibers are pasted into the optical fiber band, the optical fiber density inside the optical cable is improved, the outer dimension of the optical cable is reduced, in addition, the cross section is in a rectangular shape, and great convenience is brought for the frequent branching and pavement fixation of the optical fiber in fiber to the home (FTTH) optical cable network wire distribution section. Simultaneously, the optical cable adopts a mode of loosely sheathing the optical fiber band in the outdoor optical cable, and the optical cable has the advantage that the outdoor optical cable can resist the external mechanical force and the environment factor influence. Therefore, the great reduction of the influence on the optical fibers inside the optical cable caused by external mechanical force and environment factors when the optical cable is distributed and placed outdoors can also be ensured.

Description

Platypelloid type loose tube fiber band communications optical cable

Technical field

The utility model relates to a kind of optical cable, especially a kind of being applicable to as being laid in the platypelloid type loose tube fiber band communications optical cable that reaches the building internal channel in the building sub-district between building in the FTTH construction.

Background technology

Mostly the optical cable that is laid in FTTH fiber cable network distribution section at present is the optical distribution cable that many tight tube fibers combine.Expansion rapidly along with the FTTH fiber cable network, the demand of optical distribution cable and fiber number also rapidly increase, and because this optical cable is to design by the inside cable principle, be on the increase navigate between building and the situation of building and building internal channel makes extraneous mechanical force and the environmental change influence increase greatly that this optical cable inner fiber is subjected to, the optical fiber transmission signal quality is subjected to very big influence.Simultaneously because this kind optical cable inner fiber closeness is not high, branch capability is little, can not adapt to repeatedly the requirement of branch, and along with the increasing of fiber number, the very fast increase of its external diameter is given to lay and fixedly brought difficulty, and these problems also do not have solution well at present.

The utility model content

Technical assignment of the present utility model is to provide a kind of platypelloid type loose tube fiber band communications optical cable at above-mentioned deficiency of the prior art, this platypelloid type loose tube fiber band communications optical cable has can guarantee very high optical fiber dense degree, adapts to the repeatedly requirement of branch of present optical distribution cable; Be convenient in building and building, building and building internal channel, lay fixing; Simultaneously can also guarantee fiber cable laying when outdoor, the optical cable inner fiber is reduced by the influence of extraneous mechanical force and environment greatly, thereby guarantees the characteristics of good signal transmission quality.

The technical scheme that its technical matters that solves the utility model adopts is: it comprises cable core, described cable core comprises fibre ribbon, optical fiber cream and the PBT pine sleeve pipe of being made up of multifiber, described fibre ribbon and optical fiber cream are arranged in the PBT pine sleeve pipe, the outside of described PBT pine sleeve pipe vertically evenly is provided with aramid yarn, the arranged outside of described aramid yarn has sheath, described sheath is and vertically is arranged at around the aramid yarn, and the optical cable global sections is flattened rectangular.

Described sheath is a pvc sheath.

Described sheath is a low-smoke and halogen-free flame retardant polyolefin jacket.

Platypelloid type loose tube fiber band communications optical cable of the present utility model is compared with prior art, has following outstanding beneficial effect: because technology controlling and process in process of production, make the fibre ribbon in the PBT pine sleeve pipe produce a rational surplus length with respect to the loose sleeve pipe of PBT, protect by the self character of optical fiber cream, PBT pine sleeve pipe, aramid yarn and pvc sheath or low-smoke and halogen-free flame retardant polyolefin jacket more in addition, can absorb and stop the influence of most of extraneous mechanical force and environmental factor, thereby have the outdoor optical cable advantage the optical cable inner fiber; Because of optical fiber is banded combination, improved the optical fiber dense degree greatly simultaneously, adapted to the FTTH fiber cable network and enlarged the requirement that optical distribution cable branch increases; Less optical cable external dimensions and square-section make it easy between building, between building and building internal channel and the building internal channel lay fixing and should not slide, so just can guarantee that again optical cable has the inside cable advantage and is suitable in the indoor characteristics such as lay of laying.

Description of drawings

Accompanying drawing 1 is the structural representation of platypelloid type loose tube fiber band communications optical cable;

Description of reference numerals: 1, optical fiber, 2, fibre ribbon, 3, optical fiber cream, 4, PBT pine sleeve pipe, 5, aramid yarn, 6, sheath.

Embodiment

With reference to explaining below 1 pair of platypelloid type loose tube fiber band communications optical cable work of the present utility model of Figure of description.

Platypelloid type loose tube fiber band communications optical cable of the present utility model, its structure comprises cable core, described cable core comprises fibre ribbon 2, optical fiber cream 3 and the PBT pine sleeve pipe of being made up of multifiber 14, described fibre ribbon 2 and optical fiber cream 3 are arranged in the PBT pine sleeve pipe 4, the outside of described PBT pine sleeve pipe 4 vertically evenly is provided with aramid yarn 5, the arranged outside of described aramid yarn 5 has sheath 6, and described sheath 6 is and vertically is arranged at around the aramid yarn 5, and the optical cable global sections is flattened rectangular.

Described sheath 6 is a pvc sheath.

Described sheath 6 is a low-smoke and halogen-free flame retardant polyolefin jacket.

During production at first multifiber 1 on professional optical fiber and band machine with the closely parallel row of certain laying tension unwrapping wire and at its surface-coated and tape tree fat to be bonded into fibre ribbon 2.This step can effectively improve optical cable inner fiber closeness.

Many fibre ribbons 2 are at the core rod that enters extruder die on the secondary coating production line on the secondary coating production line with the drawing tension unwrapping wire of certain speed then, have spindle that optical fiber cream 3 is sprayed on around the fibre ribbon 2 in core rod.Subsequently at the mould outlet place, extruding machine is extruded the PBT material of molten condition around fibre ribbon 2 and optical fiber cream 3, and along with tractive force fast moves forward, the PBT material of molten condition forms PBT pine sleeve pipe 4 in hot water storgae and the quick crystallisation by cooling sclerosis of cold rinse bank.This step is by reasonable disposition fibre ribbon 2 laying tensions, cold and hot water temperature and rely on optical fiber cream 3 self characters, makes fibre ribbon 2 form the surplus length of using under the suitable outdoor environment in PBT pine sleeve pipe 4.

Once more, PBT pine sleeve pipe 4 draws unwrapping wire with certain laying tension on the cable jacket production line.Before entering extruding machine rectangular mould core rod, the vertically uniform aramid yarn 5 of one deck is covered around PBT pine sleeve pipe.Pass again subsequently extruding machine rectangular mould core rod to mould mouth place by extruding machine with the pvc sheathing compound of molten condition or low smoke halogen-free flame-retardant polyolefin material extrude in around, the preformed optical cable is and then by quick traction cooling forming to the cold rinse bank.

When this kind optical cable is used for FTTH fiber cable network optical distribution cable, because of optical fiber dense degree height can be repeatedly branch connection easily continuously.Again because of physical dimension I such as flat category-5 cable etc. with rectangular lines be stuck on the building wall, fixing on the building internal channel wall.This type of is fixed, and cable should not slide.

This kind optical cable is because of having inside cable and outdoor optical cable advantage concurrently, thus can adapt to outdoor various mechanical external force and such environmental effects, again can be little, be convenient to lay fixing advantage and be applicable in the building with its optical fiber dense degree height, overall dimensions.

Except that the described technical characterictic of instructions, be the known technology of those skilled in the art.

Claims

1. platypelloid type loose tube fiber band communications optical cable, comprise cable core, it is characterized in that: described cable core comprises fibre ribbon, optical fiber cream and the PBT pine sleeve pipe of being made up of multifiber, described fibre ribbon and optical fiber cream are arranged in the PBT pine sleeve pipe, the outside of described PBT pine sleeve pipe vertically evenly is provided with aramid yarn, the arranged outside of described aramid yarn has sheath, and described sheath is and vertically is arranged at around the aramid yarn, and the optical cable global sections is flattened rectangular.

2. platypelloid type loose tube fiber band communications optical cable according to claim 1, it is characterized in that: described sheath is a pvc sheath.

3. platypelloid type loose tube fiber band communications optical cable according to claim 1, it is characterized in that: described sheath is a low-smoke and halogen-free flame retardant polyolefin jacket.