CN201075139Y

CN201075139Y - Full dry type layer twisting optical cable

Info

Publication number: CN201075139Y
Application number: CNU2007200389829U
Authority: CN
Inventors: 陈晓红; 赵佩杰; 杨红蕾; 邱伟丰
Original assignee: Jiangsu Etern Co Ltd
Current assignee: Jiangsu Etern Co Ltd
Priority date: 2007-06-29
Filing date: 2007-06-29
Publication date: 2008-06-18
Anticipated expiration: 2017-06-29

Abstract

The utility model relates to a full-dry layer stranded optical cable, comprising a cable core, and a protection sleeve which is sleeved on the periphery of the cable core. The cable core comprises a plurality of sleeve units and fastening yarns used for hooping the plurality of sleeve units; a first filling space is arranged between the sleeve units and the fastening yarns; each sleeve unit comprises at least one bunch of optical fiber and a loose sleeve which is sleeved on the periphery of the optical fiber; a second filling space is arranged between the optical fiber and the loose sleeve; a plurality of water-blocking yarns are arranged respectively in the first filling space and the second filling space. The arrangement of the water-blocking yarns greatly lightens the weight of the optical cable which is softer can be flexibly bent and is convenient for middle connection and application. Furthermore, when the optical cable is damaged by external force and water or moisture air enters the cable, the water-blocking yarns are expanded through water adsorption, thus blocking the damaged opening; the optical fiber is prevented from being damaged by water and moisture air and is ensured to transmit data correctly, and the service life of the optical cable is prolonged.

Description

Dry type layer strand optical cable

Technical field

The utility model relates to a kind of dry type layer strand optical cable.

Background technology

Existing layer strand optical cable generally includes cable core, be set in the sheath of cable core periphery, cable core comprises a plurality of tube units, be used for bundle yarn with a plurality of tube unit phase bandings, has first packing space between tube unit and bundle yarn, each tube unit comprises a branch of at least optical fiber, be set in the loose sleeve pipe of optical fiber periphery, has second packing space between described optical fiber and described loose sleeve pipe, be filled with waterproofing unction at first packing space and second packing space, work and cleaning when this kind optical cable is unfavorable for continuing use, and in the building during vertical run because the long term ointment of gravity can be dirty, pollute connector box and influence transmission performance.

Summary of the invention

The utility model purpose is to provide a kind of dry type layer in light weight, soft, good bending property to twist optical cable in order to overcome the deficiencies in the prior art.

For achieving the above object, the technical solution adopted in the utility model is: a kind of dry type layer strand optical cable, comprise cable core, be set in the sheath of described cable core periphery, described cable core comprises a plurality of tube units, be used for bundle yarn with described a plurality of tube unit phase bandings, has first packing space between described tube unit and described bundle yarn, described each tube unit comprises a branch of at least optical fiber, be set in the loose sleeve pipe of described optical fiber periphery, have second packing space between described optical fiber and described loose sleeve pipe, in described first packing space and second packing space, be respectively arranged with many water blocking yarns.

To the variation of technique scheme be explained as follows:

1, described cable core also comprises strengthening core, and described a plurality of tube units are around the periphery setting of described strengthening core.Strengthening core is set, can increases the tensile property of optical cable on the other hand so that the structure of optical cable is more stable on the one hand.

2, described bundle yarn is a water blocking yarn, pricks yarn and also adopts water blocking yarn can further realize the function of waterproof, and prick water blocking yarn that yarn adopts two high expansivitys and intersect and prick knot, can form the water-ring of a sealing.

3, described sheath comprises the oversheath that is set in described cable core periphery, and described oversheath material is the low-smoke non-halogen flame-retardant tygon.Adopt the oversheath of this kind material, make optical cable have good flame retardancy.

4, described sheath also comprises the metal tape between described cable core periphery and described low-smoke non-halogen flame-retardant tygon oversheath.

5, the described optical fiber of multi beam is bonding successively is arranged to fibre ribbon, and at least two described fibre ribbons are provided with composition fibre ribbon duplexer stackedly.According to different use needs, the optical fiber in the cable core can be multiple beams of optical fiber, can be the fibre ribbon of the bonding composition of multiple beams of optical fiber, also can be the folded mutually fibre ribbon duplexer of forming of a plurality of fibre ribbons.

Because the utilization of technique scheme, the utility model compared with prior art has following advantage: owing to be respectively arranged with water blocking yarn at first packing space and second packing space of cable core, so planting layer strand optical cable is the dry type optical cable, and water blocking yarn is lighter, therefore alleviated the weight of optical cable greatly, optical cable is soft more, can be crooked flexibly, and be convenient to the centre and continue and use.And when optical cable is influenced by external force damage and water inflow or moisture are arranged; thereby the water blocking yarn of first packing space and second packing space all can imbibition be blocked breach; protected optical fiber not to be subjected to the invasion and attack of water and moisture, guaranteed that optical fiber correctly transmits data, and prolong the serviceable life of optical cable.

Description of drawings

Accompanying drawing 1 is the utility model embodiment one cross sectional representation;

Accompanying drawing 2 is this enforcement new embodiment two cross sectional representation;

Wherein: 1, cable core;

11, tube unit; 111, optical fiber; 112, loose sleeve pipe;

12, prick yarn; 13, first packing space; 131, water blocking yarn; 14, second packing space;

141, water blocking yarn; 15, strengthening core; 16, fibre ribbon duplexer;

2, sheath; 21, oversheath; 22, metal tape;

Embodiment

Below in conjunction with accompanying drawing, describe particular content of the present utility model in detail for example:

Embodiment one:

As shown in Figure 1 be dry type layer strand optical fiber cable, comprise cable core 1, be arranged at the sheath 2 of cable core 1 periphery, wherein said sheath 2 comprises metal tape 22, oversheath 21 from the inside to the outside successively, described oversheath 21 adopts high-quality low-smoke non-halogen flame-retardant oversheath material, and this kind material has good flame retardancy.

Cable core 1 comprises a strengthening core 15, the bundle yarn 12 that gets up around a plurality of tube units 11 of described strengthening core 15 periphery settings, with described each tube unit 11 banding, strengthening core 15 can make that the structure of optical cable is more stable, and strengthening core 15 is set can makes the tensile property of optical cable be improved.In the present embodiment, the number of tube unit 11 is six, the equally spaced periphery that is distributed in strengthening core 15.Prick yarn 12 and strengthening

core

15 and 11 of each tube units and have first packing space 13.

Each tube unit 11 comprises optical fiber 111, is set in the loose sleeve pipe 112 of optical fiber 111 peripheries, and in the present embodiment, optical fiber 111 is two bundles, has second packing space 14 between optical fiber 111 and loose pipe box 112.The material of wherein loose pipe box 2 adopts PBT, i.e. polybutylene terephthalate (polybutyleceterephthalate), and this is a general knowledge known in this field, does not repeat them here.

In first packing space 13, fill out and be provided with water blocking yarn 131, also fill out at second packing space 14 and to establish water blocking yarn 141, can be different according to first packing space 13 and the number of second packing space, 14 interior water blocking yarns of filling, usually, the number of the water blocking yarn 131 of filling in first packing space 13 is more, be thicker water blocking yarn, and the number of the water blocking yarn 141 of filling is less, is thin water blocking yarn relatively in second packing space 14.Replace traditional ointment with water blocking yarn; make that the weight of whole optical cable is lighter; pliability is better; continue in the middle of being convenient to; and, water blocking yarn can expand immediately because meeting water; thereby when optical cable has breakage to enter water or makes moist, expand immediately and block breach, protected fibre ribbon not to be subjected to the invasion and attack of water or moisture thereby water blocking yarn can absorb moisture.

Prick yarn 12 and adopt two high expansivity water blocking yarns of high-quality to intersect to prick knot and form closed-loop, the one, can securely each loose sleeve pipe 12 be bundled, the 2nd, further waterproof.

Use in the indoor environment of a large amount of optical fiber of needs such as the light-duty central tubular optical cable of present embodiment is specially adapted in the building, machine room.

Embodiment two:

Shown in the accompanying drawing 2 is that the dry type layer twists optical fiber ribbon cable, the difference technical characterictic of present embodiment and embodiment one is: in each tube unit 11 in the cable core 1 a fibre ribbon duplexer 16 is set, this fibre ribbon duplexer 16 is formed by a plurality of fibre ribbons are folded mutually, each fibre ribbon is made up of bonding successively multiple beams of optical fiber 111, in the present embodiment, each fibre ribbon comprises eight described optical fiber 111, and fibre ribbon duplexer 16 forms by four described fibre ribbons are folded mutually.Certainly, the number of plies of the number of optical fiber 111 and fibre ribbon duplexer 16 can be according to the needs that use and flexible design in each fibre ribbon.

Present embodiment and embodiment one identical technical characterictic does not repeat them here.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present 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 present utility model.

Claims

1. a dry type layer twists optical cable, comprise cable core (1), be set in the peripheral sheath (2) of described cable core (1), described cable core (1) comprises a plurality of tube units (11), be used for bundle yarn (12) with described a plurality of tube units (11) phase banding, has first packing space (13) between described tube unit (11) and described bundle yarn (12), described each tube unit (11) comprises a branch of at least optical fiber (111), be set in the loose sleeve pipe (112) of described optical fiber (111) periphery, have second packing space (14) between described optical fiber (111) and described loose sleeve pipe (112), it is characterized in that: in described first packing space (13) and second packing space (14), be respectively arranged with many water blocking yarns (131,141).

2. dry type layer strand optical cable according to claim 1, it is characterized in that: described cable core (1) also comprises strengthening core (15), described a plurality of tube units (11) are around the periphery setting of described strengthening core (15).

3. dry type layer strand optical cable according to claim 1 and 2, it is characterized in that: described bundle yarn (12) is a water blocking yarn.

4. dry type layer strand optical cable according to claim 1 and 2, it is characterized in that: described sheath (2) comprises the oversheath (21) that is set in described cable core (1) periphery, and described oversheath (21) material is the low-smoke non-halogen flame-retardant tygon.

5. dry type layer strand optical cable according to claim 4, it is characterized in that: described sheath (2) also comprises the metal tape (22) that is positioned between described cable core (1) periphery and the described low-smoke non-halogen flame-retardant tygon oversheath (21).

6. dry type layer strand optical cable according to claim 1, it is characterized in that: the described optical fiber of multi beam (111) is bonding successively is arranged to fibre ribbon, and at least two described fibre ribbons are provided with composition fibre ribbon duplexer (16) stackedly.