CN2168265Y

CN2168265Y - Reinforced central-tube type cable

Info

Publication number: CN2168265Y
Application number: CN 93242379
Authority: CN
Inventors: 邹林森; 姚水明; 秦寿松; 陈雪鹏; 许明剑
Original assignee: Research Department Of Optical Fiber And Cable Wuhan Academy Of Posts And Telecommunications Ministry Of Posts And Telecommunications
Current assignee: Research Department Of Optical Fiber And Cable Wuhan Academy Of Posts And Telecommunications Ministry Of Posts And Telecommunications
Priority date: 1993-10-22
Filing date: 1993-10-22
Publication date: 1994-06-08
Anticipated expiration: 2003-10-22

Abstract

The utility model relates to a reinforced central-tube type cable, used for the communication transmission system. The utility model is characterized in that the outside of a PBT tube provided with the optic fiber is wrapped with a PE inner sheath, the two sides of the PBT tube is provided with reinforced wires in the PE inner sheath, the outside of the PE inner sheath is provided with a water resisting layer and a longitudinal covering corrugated steel belt, and the outside of the longitudinal covering corrugated steel belt is wrapped with a PE outer sheath. The utility model has the advantages that the PE outer sheathed is wrapped evenly, the optic cable can not be damaged easily, the electric strength is high, and the process and the manufacture are convenient; as the outside of the PBT is additionally provided with a layer of longitudinal covering corrugated steel belt, the optic cable has high mechanical strength and high bulletproof performance. The utility model can be used in the post communication transmission system.

Description

Reinforced central-tube type cable

The utility model relates to a kind of enhancement mode central tubular optical cable that is used for telecommunication transmission system, is the improvement to existing central tubular optical cable.

More and more be widely used in the transmission system of main line, interval and user network owing to its unique transmission performance at post and telecommunications system optical cable.Its cross-section structure radially of existing central tubular optical cable is as shown in Figure 1: UV curing optical fiber 5 places the PBT pipe 7 that is full of ointment 4, outside the PBT pipe, be respectively equipped with water blocking layer 6 and vertical bag wrinkle steel band 2, the outermost layer of whole optical cable then is enclosed with PE outer jacket 1, and the both sides in the PE outer jacket are installed with strengthens steel wire 3.In actual production and using, there is following deficiency in above-mentioned existing central tubular optical cable: one, owing to strengthen the outside that steel wire is positioned at vertical bag wrinkle steel band, make that the PE outer jacket of strengthening the steel wire outside is thin partially, the electric strength that is easy to cause the damaged of optical cable PE outer jacket and reduces optical cable; Its two, because of vertical bag wrinkle steel band is arranged at the la m of strengthening steel wire, its radius is less, on processing technology, is not easy to the parcel and the side seam overlap joint of vertical bag wrinkle steel band, for guaranteeing its quality, the difficulty of manufacturing process also increases accordingly; Secondly, existing central tubular optical cable also exists ballistic performance poor, the problem of easily being damaged.

Task of the present utility model is to provide a kind of enhancement mode central tubular optical cable, and it not only has PE outer jacket parcel evenly, and optical cable is cracky and the high characteristic of electric strength not, and the processing technology of vertical bag wrinkle steel band in the fiber optic cable production is improved.

Task of the present utility model is realized by following scheme: the optical cable center has UV curing optical fiber 5, the UV curing optical fiber places the PBT pipe 7 that is full of ointment 4, its difference is that the PRT pipe is wrapped with PE sheath 8, PBT pipe both sides are installed with and strengthen steel wire 3 in the PE sheath, PE sheath 8 outer water blocking layer 6 and the vertical bag wrinkle steel bands 2 of being provided with wrap up PE outer jacket 1 again outside vertical bag wrinkle steel band.

According to such scheme, the utility model will be strengthened steel wire 3 and be arranged in the layer of indulging bag wrinkle steel band, like this, can make PE outer jacket 1 evenly be paperwrapped in vertical wrinkle steel band around, eliminated the thin partially district that strengthens steel wire outside P E outer jacket in the existing optical cable, improved the resisting breakage ability of optical cable, simultaneously the electric strength of whole optical cable is improved, in addition, because the corresponding increase of vertical bag wrinkle steel band diameter makes it be easy to crooked parcel in fabrication and processing, side seam is easy to overlap joint, thereby also having improved vertical processing technology of wrapping the wrinkle steel band in the optical cable processing, the utility model also has the physical strength height, the characteristics that radial dimension is convenient to optimize.

Fig. 1 cuts open figure for the radial section of existing central tubular optical cable.

Fig. 2 cuts open figure for the radial section of an embodiment of the utility model.

Fig. 3 cuts open figure for the radial section of another embodiment of the utility model.

An embodiment of the present utility model as shown in Figure 2, PBT pipe 7 is positioned at the center of optical cable, UV curing optical fiber 5 is housed in the PBT pipe and is full of ointment 4, be wrapped with PE sheath 8 at the PBT pipe, in the PE sheath, be installed with on the central plane of PBT pipe both sides and strengthen steel wire 3, outside the PE sheath, be surrounded by water blocking layer 6 and vertical bag wrinkle steel band 2, water blocking layer 6 can be made of waterstop or water-ring, the seam crossing of vertical bag wrinkle steel band can overlap with viscose glue, to guarantee the quality of seam overlap joint, be wrapped with PE outer jacket 1 at vertical bag wrinkle steel band 2.

The 2nd embodiment of the present utility model as shown in Figure 3, the difference of it and a last embodiment is: between PBT pipe 7 and PE sheath 8, water blocking layer 10 and interior vertical Baogang are with 9 in being provided with again, interior vertical Baogang is with 9 can adopt the plain bar band, the also available viscose glue overlap joint of steel band seam, constitute the clad steel band structure thus, other structure is then identical with a last embodiment, present embodiment has excellent mechanical intensity, ballistic performance and humidity resistance, when its built on stilts laying, can resist the strike of birdshot, make optical cable exempt from destruction, guarantee the normal operation of optical cable communication system.

The utility model is because its member is rationally distributed, compact, and comparing its diameter of section with the optical cable of existing same specification can't increase, and will help the optimization of radial dimension.

Claims

1, a kind of enhancement mode central tubular optical cable that is used for telecommunication transmission system, the optical cable center has UV curing optical fiber (5), the UV curing optical fiber places the PBT pipe (7) that is filled with ointment (4), it is characterized in that the PBT pipe is wrapped with PE sheath (8), PBT pipe both sides are installed with and strengthen steel wire (3) in the PE sheath, outer water blocking layer (6) and the vertical bag wrinkle steel band (2) of being provided with of PE sheath (8) is at vertical bag wrinkle steel band outer wrapping PE outer jacket (1).

2,, it is characterized in that between PBT pipe (7) and PE sheath (8), being provided with again interior water blocking layer (10) and interior vertical Baogang's band (9) by the described enhancement mode central tubular of claim 1 optical cable.

3,, it is characterized in that vertical bag wrinkle steel band (2) seam crossing overlaps with viscose glue by claim 1 or 2 described enhancement mode central tubular optical cables.

4, by the described enhancement mode central tubular of claim 3 optical cable, vertical Baogang band (9) seam crossing overlaps with viscose glue in it is characterized in that.

5, by claim 1 or 2 described enhancement mode central tubular optical cables, it is characterized in that water blocking layer (6) is made of waterstop or water-ring.