CN2722273Y

CN2722273Y - Outdoor medium central tubing miniature optical cable

Info

Publication number: CN2722273Y
Application number: CN2004200651235U
Authority: CN
Inventors: 史惠萍; 王英明; 姚水明; 李宏强; 程淑玲
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2004-06-29
Filing date: 2004-06-29
Publication date: 2005-08-31
Anticipated expiration: 2014-06-29

Abstract

The utility model relates to an outdoor medium central tubing miniature optical cable in the technical field of communication optical cable, belonging to a miniature optical cable with small external diameter and light weight, comprising a loose casing tube. The loose casing tube is coated with optical fibers or optical fiber ribbons. The outermost layer of the optical cable is coated with an external casing. A reinforced fiber glass ribbon (FRP ribbon) layer is arranged between the loose casing tube and the external casing, which forms the reinforced layer. The utility model has benefit effects as follow; 1. The optical cable has simple and compact structure; the reinforced fiber glass ribbon (FRP ribbon) layer has higher carrying capacity, better compression resistance, smaller external diameter of the optical cable in comparison to the same kind of optical cables, lighter weight, lower cost in manufacture and laying, and easy installation and maintenance, applicable to lightning environment. 2. During actual use, the utility model saves pipeline resources to the maximum, enables the limited pipeline space to contain more optical fiber cores, and effectively controls the construction cost of communication pipelines, with significant economic benefits.

Description

The full medium central tubular of outdoor use micro optical cable

Technical field

The utility model relates to a kind of full medium central beam tube type optical cable that is used for outdoor laid of communications optical cable technical field, and it is little to belong to a kind of external diameter, lightweight micro optical cable.

Background technology

At present, the full medium central beam tube type optical cable (ADSS) of outdoor use utilizes the built on stilts use of electric power transmission shaft tower self-bearing type usually.Owing to there is not stilt, the deadweight of optical cable and all loads all need optical cable self to bear, thereby more reinforcement need be set in cable core to satisfy the requirement of usability, simultaneously in work progress, for preventing to drag the outer jacket with the friction damage optical cable, the thickness of outer jacket also requires thicker, is generally 1.8mm, therefore, the external diameter of whole optical cable is bigger.When using in Access Network and Metropolitan Area Network (MAN), because conduit resource is limited, thick excessively optical cable has taken in the bigger pipeline empty, and the fiber number that holds is limited, therefore makes that the laid down cost of optical cable is too high.

Summary of the invention

Technical problem to be solved in the utility model is to provide the full medium central tubular of a kind of outdoor use micro optical cable at the deficiency of above-mentioned prior art existence, and this cable configuration is simply compact, and external diameter is little, in light weight, cost is low, is convenient to installation and maintenance, and can use under the thunder and lightning environment.

The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: include loose sleeve pipe 3, be laid with optical fiber 1 or fibre ribbon in the pine sleeve pipe, the outermost layer of optical cable coats oversheath 5, its difference is to be provided with glass fiber tape (FRP band) layer 4 of reinforcement between loose sleeve pipe and oversheath, constitute the reinforcement layer of optical cable.

The beneficial effects of the utility model are:

1. cable configuration is simply compact, glass fiber tape (FRP band) layer of strengthening has stronger load-bearing capacity and better compressive property, cable outer diameter is compared greatly with similar optical cable and is dwindled, it is in light weight, manufacture craft is simple, the cost of making and laying is low, is convenient to installation and maintenance, can use under the thunder and lightning environment;

The utility model relatively sees the following form with the full medium central beam tube type optical cable of tradition:

Fiber cable type	Fiber number	External diameter mm	Unit weight kg/km
Fiber cable type	Fiber number	External diameter mm	Unit weight kg/km	Full medium central tubular micro optical cable	12	5.8	32
Full medium central beam tube type optical cable	12	9.6	82	Full medium central tubular micro optical cable	12	5.8	32

2. when reality is used, can save conduit resource to greatest extent, make and to hold more optical fiber core number in the limited pipeline space, help the control of communication pipe construction cost, have good economic benefits.

Description of drawings

Fig. 1 is the radial structure sectional view of an embodiment of the utility model.

Fig. 2 is the radial structure sectional view of second embodiment of the utility model.

Embodiment

First embodiment of the utility model as shown in Figure 1, include loose sleeve pipe 3, optical fiber 1 is enclosed within the loose sleeve pipe by pine, is filled with the filler 2 that blocks water in the loose sleeve pipe, and the filler that blocks water can be greasy for preventing water, glass fiber tape (FRP band) layer 4 that vertical bag is strengthened outside loose sleeve pipe, constitute the reinforcement layer of optical cable, the thickness of this reinforcement layer is 0.3～1.5 millimeter, coats one deck oversheath 5 in the glass fibre belt outside of strengthening, oversheath can be made by the PE plastics, also can be made by halogen-free low-smoke flame retardant material.

Second embodiment as shown in Figure 2, the difference of it and first embodiment is to be laid with water blocking yarn or waterstop 6 in the glass fibre belt of strengthening 4, in order to strengthen the block-water performance and the loading strength of optical cable.

Claims

1. the full medium central tubular of outdoor use micro optical cable, include loose sleeve pipe (3), be laid with optical fiber (1) or fibre ribbon in the pine sleeve pipe, the outermost layer of optical cable coats oversheath (5), it is characterized in that between loose sleeve pipe and oversheath, being provided with the glass fibre belt (4) of reinforcement, constitute the reinforcement layer of optical cable.

2. by the full medium central tubular of the described outdoor use of claim 1 micro optical cable, it is characterized in that in the glass fibre belt of strengthening (4), being laid with water blocking yarn or waterstop.

3. by claim 1 or the full medium central tubular of 2 described outdoor uses micro optical cable, it is characterized in that the thickness of the glass fibre belt (4) of described reinforcement is 0.3～1.5 millimeter.