CN202267764U

CN202267764U - Indoor optical cable

Info

Publication number: CN202267764U
Application number: CN201120255991XU
Authority: CN
Inventors: 李即佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2012-06-06
Anticipated expiration: 2021-07-20

Abstract

The utility model relates to the field of communication cables, in particular to an indoor cable. Due to the fact that a full medium non-metal inflaming retarding covering structure with an inner layer water blocking yarn, a sleeve, an outer layer water blocking yarn, a reinforcing piece stranded protection layer and a protective sleeve sequentially arranged from the inside to the outside with a reinforcing rope as a shaft is adopted, the indoor optical cable optimizes and reduces dimension and weight of the optical cable and obtains good thunder striking resistance and a full section water resistance effect. The double structure of the reinforcing rope and the reinforcing piece stranded protection layer improves pulling resistance, lateral stressing resistance and fatigue damage resistance of the optical cable.

Description

A kind of inside cable

Technical field

The utility model relates to the communications optical cable field, specifically refers to a kind of inside 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 steel belt layer, water blocking layer, sleeve pipe to be wrapped in wherein successively, also is shaped on the steel wire of reinforcement in the sheath, and the important document of forming optical cable is that optical fiber then is suspended in the sleeve pipe that has been full of ointment.Wherein, water blocking layer is mainly used in waterproof; The steel wire of steel belt layer and reinforcement is then mainly in order to resistance to compression and support optical cable; Ointment in the sleeve pipe is to protect wherein trickle optical fiber and waterproof equally.This optical cable mainly reaches the purpose of waterproof with the ointment of its filling, in case optical cable damages or when breaking, the overflow of ointment will cause certain influence to environment; Secondly, the unit mass of this structure optical cable is bigger; Moreover because of casing size CS is bigger, so it is also bigger to hold the space hold of unit number of fibers, promptly cable configuration seems that thick heaviness is not compact.

The utility model content

The utility model purpose is to solve the existing above-mentioned deficiency of optical cable, and a kind of inside cable of simple in structure, dependable performance is provided.

A kind of inside cable; Comprise sheath, water blocking layer, reinforcement rope; Wherein set gradually internal layer water blocking yarn, sleeve pipe, outer water blocking yarn, the stranded sheath of reinforcement, sheath so that to strengthen rope be axle by from inside to outside level, said internal layer water blocking yarn is arranged in strengthens rope and the tangent gap of sleeve pipe, and outer water blocking yarn is arranged in stranded sheath of reinforcement and the tangent gap of sleeve pipe; Tearing rope and being located at the interface that the stranded sheath of reinforcement and sheath join, also being provided with at least one gasket for packing on the said sleeve pipe.

The said rope of tearing places sheath interior and tangent with the stranded sheath outside surface of reinforcement.

The beneficial effect of the utility model: owing to adopt to strengthen rope is axle sets gradually internal layer water blocking yarn, sleeve pipe, outer water blocking yarn, the stranded sheath of reinforcement, sheath by level from inside to outside the nonmetal fire-retardant clad structure of full medium; Not only optimize and alleviated the dimensional weight of optical cable, and obtained good anti-thunderbolt performance and total cross-section block-water effect.The dual structure of strengthening rope and the stranded sheath of reinforcement has improved the tension of optical cable, lateral pressure resistant, has reached the performance that antifatigue is destroyed.The utility model reasonable in design, suitable Access Network are rushed to repair lightguide cable link, pipe lead road, the built on stilts application that reaches direct-burried repairing circuit, arrives family and indoor leading in cable circuit.

Description of drawings

Fig. 1 is the cross-sectional structure synoptic diagram of the utility model.

Embodiment

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Be to be understood that practical implementation instance described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Accompanying drawing 1 is to be provided with the embodiment that four ferrules constitute a kind of inside cable, and sheath 1 is processed by halogen-free low-smoke flame retardant material, and this sleeve pipe has good flame retardancy; The axle center of sheath 1 is provided with nonmetal reinforcement rope 2; Be provided with two internal layer water blocking yarns 40 that are wound in nonmetal reinforcement rope 2 outside this reinforcement rope 2; Be provided with four sleeve pipe 3 and gasket for packings 6 that are provided with optical fiber 31 in nonmetal reinforcement rope 2 and internal layer water blocking yarn 40 synthetic peripheries, the quantity of gasket for packing can be added according to demand certainly; Described water blocking yarn 40 is arranged in the gap of adjacent casing 3 and the gap of sleeve pipe 3 and gasket for packing 6; Four sleeve pipes 3 and a gasket for packing 6 are implemented stranded by certain pitch; Be stranded one section of first forward, carry out reverse stranding again; Sleeve pipe 3 after stranded has two outer water blocking yarns 41 with its binding with gasket for packing 6; Wherein water blocking yarn 41 is arranged in the gap with the tangent sleeve pipe 3 of the stranded sheath of reinforcement 7, and another root then is arranged in the gap of sleeve pipe 3 and gasket for packing 6, gives coated by the stranded sheath 7 of reinforcement then.Be equipped with on the interface that stranded sheath 7 of reinforcement and sheath 1 join and tear rope 5; Tearing rope 5 places sheath 1 interior and tangent with stranded sheath 7 outside surfaces of reinforcement; Tear rope 5 and processed by polyester or aramid fiber material, its effect is to carry out the welding of fibre-optical splice for tearing sheath 1 easily.The utility model is because of strengthening the dual structure of rope 2 and the stranded sheath 7 of reinforcement; Not only significantly strengthened the tensile strength of optical cable; And having kept the enough pliabilities of optical cable, the

water blocking yarn

40,41 of sleeve pipe 3 and gasket for packing 6 and ectonexine winding has simultaneously guaranteed the block-water performance of optical cable total cross-section.Secondly; Also owing to adopted the dry type stop water of the yarn wound form of lighter weight; Still can satisfy the requirement of holding 12 optical fiber after making the diameter of former sleeve pipe reduce, not only optimize the physical dimension and the weight of optical cable, and reduced material and production cost relatively.

Claims

1. inside cable; Comprise sheath, water blocking layer, reinforcement rope; It is characterized in that: set gradually internal layer water blocking yarn, sleeve pipe, outer water blocking yarn, the stranded sheath of reinforcement, sheath by from inside to outside level so that to strengthen rope be axle; Said internal layer water blocking yarn is arranged in strengthens rope and the tangent gap of sleeve pipe; Outer water blocking yarn is arranged in the stranded sheath of reinforcement and the tangent gap of sleeve pipe, and tearing restricts is located at the interface that the stranded sheath of reinforcement and sheath join, and also is provided with at least one gasket for packing on the said sleeve pipe.

2. inside cable according to claim 1 is characterized in that: tear rope and place sheath interior and tangent with the stranded sheath outside surface of reinforcement.