CN202049268U

CN202049268U - 8-shaped flat loose tube optical fiber band communication optical fiber

Info

Publication number: CN202049268U
Application number: CN2011201269197U
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 an 8-shaped flat loose tube optical fiber band communication optical fiber. 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 cable core coated with the aramid fiber yarn is arranged in parallel to a steel strand, in addition, 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 yarn, and finally, the cross section of the optical fiber is in an 8 shape. Because the steel strand and the optical cable core are extruded into a whole in the production process, external hanging of instruments are not needed during the optical fiber pavement, the hanging effect can be realized only through the self steel strand part, the pavement cost is greatly saved, and the pavement is convenient. Simultaneously, the optical fibers arranged in the optical cable are in loose tube optical fiber band combination, the outdoor environment adapting performance is realized, the optical fiber density is greatly improved, the outer diameter of the optical cable is reduced, and good conditions are provided for the multi-time branch pavement and continuing of the optical cable after entering the building areas.

Description

8 word platypelloid type loose tube fiber band communications optical cables

Technical field

The utility model relates to a kind of optical cable, and especially a kind of being applicable to as connecting in the FTTH construction to be laid in respectively built the 8 word platypelloid type loose tube fiber band communications optical cables that reach between the sub-district between sub-district and the optical line terminal in the city.

Background technology

Along with the construction of FTTH network enlarges day by day, connect respectively build between the sub-district in the city and sub-district and optical line terminal between optical cable and fiber number sharply increase.Be laid in this regional optical cable at present and mostly be common outdoor optical cable.But this class optical cable is clumsy, need extension such as steel strand wires to hang equipment when laying, and the space is crowded narrow and small in the city, and laid down cost is high and to lay difficulty big.This type of problem does not also have good solution at present.

The utility model content

Technical assignment of the present utility model is to provide a kind of 8 word platypelloid type loose tube fiber band communications optical cables at above-mentioned deficiency of the prior art, this 8 word platypelloid type loose tube fiber band communications optical cable has the extension hanging part branch that connects one, can be laid in very easily respectively to build in the city to reach between sub-district and the optical line terminal between the sub-district; Simultaneously, this kind optical cable has the loose tube fiber band structure, can guarantee very high optical fiber dense degree and be adapted to outdoor environment, has reduced the external diameter of optical cable, and building is laid in the sub-district, repeatedly branch connection has been created the characteristics of condition easily for optical cable enters.

The technical scheme that its technical matters that solves the utility model adopts is: it comprises cable core, described cable core comprises the fibre ribbon of being made up of multifiber, optical fiber cream and PBT pine sleeve pipe, 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 top of described cable core is provided with steel strand wires, the arranged outside of described steel strand wires and aramid yarn has sheath, described sheath is and vertically is arranged at around aramid yarn and the steel strand wires, and form the rectangular suspender belt in cross section between steel hinge line and aramid yarn, the optical cable global sections is 8 word flattened rectangular.

Described steel strand wires and cable core be arranged in parallel.

Described sheath is a pvc sheath.

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

8 word platypelloid type loose tube fiber band communications optical cables of the present utility model are compared with prior art, has following outstanding beneficial effect: owing in process of production steel strand wires and optical cable core are extruded in one, so, optical cable can outsidely be hung when laying and hang equipment, only rely on self steel strand wires partly to play to hang and hang effect, greatly saved laid down cost and made things convenient for and laid; Simultaneously, have the performance that adapts to outdoor environment and improved the optical fiber dense degree greatly, reduced cable outer diameter, lay for optical cable enters repeatedly branch behind the building sub-district, continuing provides good characteristics such as condition because of the optical cable inner fiber is the combination of loose tube fiber band.

Description of drawings

Accompanying drawing 1 is the structural representation of 8 word platypelloid type loose tube fiber band communications optical cables;

Description of reference numerals: 1, optical fiber, 2, fibre ribbon, 3, optical fiber cream, 4, PBT pine sleeve pipe, 5, aramid yarn, 6, steel strand wires, 7, suspender belt, 8, sheath.

Embodiment

With reference to explaining below 1 pair of 8 word platypelloid type loose tube fiber band communications optical cables work of the present utility model of Figure of description.

8 word platypelloid type loose tube fiber band communications optical cables of the present utility model, its structure comprises cable core, described cable core comprises the fibre ribbon of being made up of multifiber 12, optical fiber cream 3 and PBT pine sleeve pipe 4, 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 top of described cable core is provided with steel strand wires 6, described steel strand wires 6 have sheath 8 with the arranged outside of aramid yarn 5, described sheath 8 is and vertically is arranged at around aramid yarn 5 and the steel strand wires 6, and form the rectangular suspender belt 7 in cross section between steel hinge line 6 and aramid yarn 5, the optical cable global sections is 8 word flattened rectangular.

Described steel strand wires 6 be arranged in parallel with cable core.

Described sheath 8 is a pvc sheath.

Described sheath 8 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 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 cable jacket 8 production lines.Before entering extruding machine 8 word rectangular mould core rods, the vertically uniform aramid yarn 5 of one deck is covered around PBT pine sleeve pipe 4.Meanwhile, the cable core of steel strand wires 6 and the aramid yarn 5 that has been covered together pass 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 the FTTH network, can in addition hang equipment, just can conveniently be laid in respectively to build in the city between the sub-district and reach between sub-district and the optical line terminal with hanging because of itself having messenger wire 7.Simultaneously, have the performance that adapts to outdoor environment and improved the optical fiber dense degree greatly, reduced cable outer diameter, lay for optical cable enters repeatedly branch behind the building sub-district, continuing provides good condition because of the optical cable inner fiber is the combination of loose tube fiber band.

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

Claims

1.8 word platypelloid type loose tube fiber band communications optical cable, comprise cable core, it is characterized in that: described cable core comprises the fibre ribbon of being made up of multifiber, optical fiber cream and PBT pine sleeve pipe, 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 top of described cable core is provided with steel strand wires, the arranged outside of described steel strand wires and aramid yarn has sheath, described sheath is and vertically is arranged at around aramid yarn and the steel strand wires, and form the rectangular suspender belt in cross section between steel hinge line and aramid yarn, the optical cable global sections is 8 word flattened rectangular.

2. 8 word platypelloid type loose tube fiber band communications optical cables according to claim 1, it is characterized in that: described steel strand wires and cable core be arranged in parallel.

3. 8 word platypelloid type loose tube fiber band communications optical cables according to claim 1, it is characterized in that: described sheath is a pvc sheath.

4. 8 word platypelloid type loose tube fiber band communications optical cables according to claim 1, it is characterized in that: described sheath is a low-smoke and halogen-free flame retardant polyolefin jacket.