A kind of half dry type inserts optical cable
Technical field
The utility model relates to a kind of user's leading in cable.
Background technology
The optical cable that adopts in the existing Access Network, mainly contain two kinds, optical cable wherein shown in Figure 1, mainly comprise optical cable main part 10 and coupled supporting member 20, wherein optical cable main part 10 comprises oversheath 101, composite steel-plastic belt 102 from outside to inside successively, fills cable cream 103, PBT sleeve pipe 104, fine cream 105 and optical fiber 106, and supporting member 20 is strengthened steel wire 202 by PE sheath 201, the metal that is arranged on its center and formed; Another kind of optical cable as shown in Figure 2, it comprises optical cable main part 30 and supporting member 40, wherein, optical cable main part 30 comprise comprise successively from outside to inside oversheath 301, composite steel-plastic belt 302, a plurality of loose tube fibers unit 303, the steel wire 304 at center and be filled in composite steel-plastic belt 302 and loose tube fiber unit 303 between fine cream 305, above-mentioned two kinds of optical cables make and use in have a following shortcoming:
1, cable outer diameter is bigger, and weight is heavier, construction inconvenience, and it is bigger to take up space.It is applicable to big core number, long distance line, and the general required core number of leading in cable is less and distance is short, and adopting this model optical cable is a kind of wasting of resources;
2, the reinforcement in the optical cable has the steel wire in steel strand wires and the cable core, makes somebody a mere figurehead the optical cable between short distance concerning between building, and optical cable resistance to tension surplus is a kind of wasting of resources;
3, in the above-mentioned two kinds of optical cable product processes of processing, higher to the configuration requirement of the equipment of each production process, cost of manufacture is higher;
4, have the cable cream that blocks water in the optical cable core now, be difficult for construction.
China is in the initial stage that 3G builds at present, and Fiber to the home is inexorable trend.Therefore, the Application and Development of novel access optical cable has been promoted to schedule.
The utility model content
The utility model purpose is exactly the access optical cable that proposes a kind of simple in structure, easy construction in order to overcome the deficiencies in the prior art.
In order to reach the foregoing invention purpose, the technical solution of the utility model is: a kind of half dry type inserts optical cable, the supporting member that comprises oversheath, is arranged on a plurality of loose tube fibers unit in the oversheath, is connected by suspender belt with oversheath, each loose tube fiber unit comprises loose sleeve pipe, is arranged on the interior multiple beams of optical fiber of loose sleeve pipe, is filled in the fine cream between loose sleeve pipe and the optical fiber, is placed with many water blocking yarns between described oversheath and fiber unit.
Further, inboard sticking being provided with of described oversheath torn rope.
Because the utilization of technique scheme, the utility model compared with prior art has following advantage: the utility model optical cable is by being provided with a plurality of loose tube units in oversheath, and between loose tube unit and oversheath, settle many water blocking yarns, the structure of optical cable is simpler on the one hand, when guaranteeing tension, compressive property and have a block-water effect preferably, and its weight is lighter, and it is more convenient to construct, and can be widely used in the fiber-to-the-home access engineering.
Description of drawings
Accompanying drawing 1 is a kind of viewgraph of cross-section that inserts optical cable in the prior art;
Accompanying drawing 2 is the another kind of viewgraph of cross-section that inserts optical cable in the prior art;
The viewgraph of cross-section of the access optical cable that accompanying drawing 3 is implemented for the utility model;
Wherein: 1, oversheath; 2, loose tube fiber unit; 21, loose sleeve pipe; 22, optical fiber; 23, fine cream; 3, suspender belt; 4, supporting member; 5, water blocking yarn; 6, tear rope;
Embodiment
Below in conjunction with accompanying drawing the utility model preferred embodiment is elaborated:
Optical cable as shown in Figure 3, comprise that xsect is circular oversheath 1, the supporting member 4 that is connected by suspender belt 3 with oversheath 1, be arranged on the interior a plurality of loose tube fibers unit 2 of oversheath 1, in the present embodiment, loose tube fiber unit 2 is three, each loose tube fiber unit 2 by loose sleeve pipe 21, be arranged on the multiple beams of optical fiber 22 in the loose sleeve pipe 21 and the fine cream 23 that is filled between loose sleeve pipe 21 and the optical fiber 22 is formed, supporting member 4 comprises insulation course 41 and core wire reinforcement 42, described insulation course 41, suspender belt 3 and oversheath 1 are one-body molded, and adopt the PE material to make.
Between oversheath 1 and each loose tube fiber unit 2, be mounted with several water blocking yarns 5, water blocking yarn 5 has stronger water absorbing properties, meeting water expands rapidly, thereby the space between oversheath and the loose sleeve pipe is filled, continue to enter optical cable inside to prevent water, itself is very light, so whole optical cable weight is lighter, replace greasy for preventing water with it, avoided overflowing of greasy for preventing water, thereby also bring convenience for construction.Simultaneously, also sticking being provided with torn rope 6 in the inboard of oversheath 1, thereby conveniently oversheath 1 peeled off.
The utlity model has following advantage:
(1) in light weight, fiber cable laying is convenient, does not have the fouls such as ointment when continuing, and is convenient to continue;
(2) combine the big and little advantage of central tubular external diameter of layer-twisted type core number;
(3) reduce size, than light weight, thereby economical with materials, save and to lay the space;
(4) product processing technique is simple, the yield rate height.