CN2657022Y

CN2657022Y - Optical cable laying in drain pipe line

Info

Publication number: CN2657022Y
Application number: CN 03237286
Authority: CN
Inventors: 李龙勤; 刘爱华; 熊壮; 许征; 罗中平; 万冰; 骆军; 王翔
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2003-09-04
Filing date: 2003-09-04
Publication date: 2004-11-17
Anticipated expiration: 2013-09-04

Abstract

The utility model relates to a fiber optic cable for communication use, suitable to be laid in sewer pipes, comprising a cable core, which is different from other cable cores in that: the cable core is wrapped with metal belt outside, and the metal belt is wrapped and covered with an inner sheath provided with fiber strength member outside, and the fiber strength member is wrapped and covered with an outer sheath. The cable core is a layer stranded fiber optic cable core or a slotted fiber optic cable core, or can be a central-tube type fiber optic cable. The beneficial effects of the utility model are that: 1. the fiber strength member is adopted outside as a strengthened layer of the cable core, which is made to have a strong tensile strength. Therefore, the cable core, when in use, can be suspended alone inside the sewer pipes without the support of other accessories, which brings convenience for laying construction and further reduces the cost of laying the fiber optic cable.2. Two protection layers, namely, the inner sheath and the outer sheath are arranged, and the outer is a sheath layer of high density PE. Meanwhile, the metal belt is adopted in the fiber optic cable structure, further strengthening the corrosion and humidity resistance properties of the fiber optic cable which can sufficiently adapt to the adverse environment of the sewer pipes.

Description

A kind of optical cable that is laid in the sewer pipe

Technical field

The utility model relates to a kind of communication optical cable that is suitable for laying in sewer pipe.

Background technology

Along with the fast development of Metropolitan Area Network (MAN) in the fiber-optic communications traffic and Access Network, the amount of laying of optical cable increases year by year.Especially it is more nervous that the pore resource of reserving in the old town in the city becomes because of laying in a large number of optical cable.Again dig and build buried pipeline the cost of laying optical cable is increased greatly.Making full use of sewer pipe widely distributed in the city then is an ideal scheme that reduces the fiber cable laying cost.But laying optical cable in sewer pipe and need be hung and lay because environmental baseline is comparatively abominable, therefore the waterproof of optical cable, anti-corrosion and strength character are had higher requirement, and the still difficult above-mentioned requirements that adapts to of the various optical cables of existing structure.

Summary of the invention

Technical problem to be solved in the utility model be the deficiency that exists at prior art and provide that a kind of corrosion stability is strong, intensity is high, good waterproof performance be suitable for the communication optical cable that lays at sewer.

The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: include cable core, its difference is that cable core is wrapped with metal tape 8, metal tape coats inner sheath 9 outward, is provided with fiber reinforcement 10 outside inner sheath, coats oversheath 11 outside the fiber reinforcement.

Press such scheme, described cable core is a layer-stranded optical cable core, or is the slotted core cable cable core, also can be the central beam tube type optical cable core; Oversheath 11 is a high density PE oversheath, but resistance to chemical attack also adds protection against rodents and anti-ant adjuvant in the PE jacket material.

The beneficial effects of the utility model are: 1, be provided with the fiber reinforcement as enhancement Layer outside cable core, make the utility model possess very strong tensile strength, can directly be hung in the sewer pipe separately during use, support and need not other auxiliary member, lay to construction and to have brought convenience, further reduced the laid down cost of optical cable; 2, the two-layer protective seam of inside and outside sheath is set; skin is a high density PE restrictive coating; and protection against rodents and anti-ant adjuvant have been added; adopted metal tape in the cable configuration simultaneously; corrosion-resistant, the humidity resistance of optical cable and protection against rodents, anti-ant performance are further strengthened, can fully be adapted to the rugged surroundings of sewer pipe.

Description of drawings

Fig. 1 is the radial section structural drawing of an embodiment of the utility model.

Fig. 2 is the radial section structural drawing of second embodiment of the utility model.

Fig. 3 is the radial section structural drawing of the 3rd embodiment of the utility model.

Fig. 4 is the radial section structural drawing of the 4th embodiment of the utility model.

Embodiment

Further specify embodiment of the present utility model below in conjunction with accompanying drawing.

The structure of first embodiment as shown in Figure 1, optical fiber 1 is sleeved in the loose sleeve pipe 3 and is filled with the fine cream 2 that blocks water, many loose sleeve pipes are stranded in the periphery of central reinforce member 5, when loose sleeve pipe lazy weight, available corresponding gasket for packing 4 substitutes, be filled with cable cream 6 between stranded loose sleeve pipe, outside band 7 loopings, constitute layer-stranded optical cable core, be wrapped with metal tape 8 at cable core, metal tape can be aluminium strip or steel band, longitudinally parcel, outside metal tape, coat inner sheath 9, be provided with fiber reinforcement 10 in the inner sheath periphery, the fiber reinforcement is made of aramid yarn or glass fibre, and outermost layer is a high density PE oversheath 11, can add protection against rodents and anti-ant adjuvant in the material of PE oversheath, with the infringement of animals such as protection against rodents ant.

Second embodiment as shown in Figure 2, its feature is to lay fibre ribbon 12 in loose sleeve pipe, fibre ribbon can be one or more and stacks, other parts are identical with first embodiment.

The 3rd embodiment as shown in Figure 3, it is a slotted core cable cable core structure, include the skeleton 13 of a circular section shape, skeleton circumferentially offer fine longitudinally trough of belt, be embedded with fibre ribbon 12 in the fine trough of belt, skeleton is provided with rib mark 14, be provided with water blocking layer 15 in the skeleton periphery, constitute the slotted core cable cable core thus, the structure of cable core periphery is identical with first embodiment, for ease of the stripping cable, can in sheath, install and tear rope 16.

The 4th embodiment as shown in Figure 4, its cable core structure comprises optical fiber 1 or the fibre ribbon that is sleeved in the loose sleeve pipe, the filling fine cream 2 that blocks water in the pine sleeve pipe, pine sleeve pipe outer wrapping water blocking layer 15, constitute the central beam tube type optical cable core thus, outside optical cable core, be coated with metal tape 8, inner sheath 9, fiber reinforcement 10 and high density PE oversheath 11 successively, in addition, symmetria bilateralis is provided with two reinforcements 17 in inner sheath, and reinforcement can be wire rope.

Claims

1, a kind of optical cable that is laid in the sewer pipe includes cable core, it is characterized in that cable core is wrapped with metal tape (8), and metal tape coats inner sheath (9) outward, is provided with fiber reinforcement (10) outside inner sheath, coats oversheath (11) outside the fiber reinforcement.

2,, it is characterized in that described cable core is a layer-stranded optical cable core by the described optical cable that is laid in the sewer pipe of claim 1.

3,, it is characterized in that described cable core is the slotted core cable cable core by the described optical cable that is laid in the sewer pipe of claim 1.

4,, it is characterized in that described cable core is the central beam tube type optical cable core by the described optical cable that is laid in the sewer pipe of claim 1.

5,, it is characterized in that oversheath (11) is a high density PE oversheath by claim 2 or the 3 or 4 described optical cables that are laid in the sewer pipe.

6,, it is characterized in that adding in the PE jacket material protection against rodents and anti-ant adjuvant by the described optical cable that is laid in the sewer pipe of claim 5.

7, by the described optical cable that is laid in the sewer pipe of claim 2, it is characterized in that optical fiber (1) is sleeved in the loose sleeve pipe (3) and is filled with the fine cream (2) that blocks water, many loose sleeve pipes are stranded in the periphery of central reinforce member (5), and the outside constitutes layer-stranded optical cable core with band (7) looping.

8, by the described optical cable that is laid in the sewer pipe of claim 3, it is characterized in that including the skeleton (13) of a circular section shape, skeleton circumferentially offer fine longitudinally trough of belt, be embedded with fibre ribbon (12) in the fine trough of belt, be provided with water blocking layer (15) in the skeleton periphery, constitute the slotted core cable cable core thus.

9, by the described optical cable that is laid in the sewer pipe of claim 4, it is characterized in that cable core structure comprises optical fiber (1) or the fibre ribbon that is sleeved in the loose sleeve pipe, the filling fine cream (2) that blocks water in the pine sleeve pipe, pine sleeve pipe outer wrapping water blocking layer (15), constitute the central beam tube type optical cable core thus, and symmetria bilateralis is provided with two reinforcements (17) in inner sheath (9).