CN210803822U

CN210803822U - Flame-retardant optical cable

Info

Publication number: CN210803822U
Application number: CN201922134794.1U
Authority: CN
Inventors: 杨美佳; 何侃云; 吴凤琦; 钱镇国; 张佳丽; 蒋莹; 方华; 丁赵伟
Original assignee: Zhejiang Dongtong Optical Network Iot Technology Co ltd
Current assignee: Zhejiang Dongtong Optical Network Iot Technology Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-06-19
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses a flame retardant cable, it includes central reinforcement (1), strand in the outside round loose tube layer (2) of central reinforcement (1), set up in loose tube layer (2) outside inner sheath layer (3), set up in the outermost flame retardant outer jacket layer (4) of flame retardant cable and set up in inner sheath layer (3) with glass cotton fire-resistant belt (5) between flame retardant outer jacket layer (4). The utility model discloses a fire-retardant optical cable is provided with the cotton fire-resistant area of glass between fire-retardant oversheath layer and inner sheath layer, has improved fire behavior of fire-retardant optical cable greatly.

Description

Flame-retardant optical cable

Technical Field

The utility model relates to an optical cable communication field, in particular to fire-retardant optical cable.

Background

Fiber optic cables are manufactured to meet optical, mechanical, or environmental performance specifications and utilize one or more optical fibers disposed in a covering jacket as the transmission medium and may be used individually or in groups as telecommunication cable assemblies. Some existing optical cables are usually made of flame-retardant materials to form flame-retardant outer sheath layers, and the optical cables have certain fireproof performance through the flame-retardant outer sheath layers, but under the condition that the fireproof requirement is increasingly improved, the optical cables in the prior art are increasingly difficult to meet the requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned defect among the prior art, provide a flame retardant cable, it has more excellent fire behaviour.

In order to realize the above-mentioned utility model purpose, the utility model provides a fire-retardant optical cable, it includes central reinforcement, strand in the outside round pine sleeve layer of central reinforcement, set up in the outside inner sheath layer of pine sleeve layer, set up in the outermost fire-retardant oversheath layer of fire-retardant optical cable and set up in the inner sheath layer with the cotton refractory band of glass between the fire-retardant oversheath layer.

Furthermore, the utility model discloses still provide following subsidiary technical scheme:

the flame-retardant outer sheath layer is made of flame-retardant nylon.

The flame-retardant optical cable further comprises an aramid fiber layer arranged outside the loose tube layer.

The flame-retardant optical cable further comprises an aluminum tape armor layer arranged between the aramid fiber layer and the inner sheath layer.

The loose tube layer comprises 6 loose tubes stranded outside the central reinforcement.

The loose tube is internally provided with a multi-core wire and filled with fiber paste.

And cable paste is filled between the loose tubes.

The flame-retardant optical cable further includes two water-blocking yarns stranded outside the central strength member.

Compared with the prior art, the utility model has the advantages of: the glass wool fire-resistant belt is arranged between the flame-retardant outer sheath layer and the inner sheath layer of the flame-retardant optical cable, so that the fireproof capacity of the flame-retardant optical cable is greatly improved, the difficulty of construction and laying is not increased under the condition of good flame-retardant effect, and better safety guarantee is provided for optical communication in areas with fire hazard in people groups such as mansions, residential buildings and the like; moreover, the utility model discloses a fire-retardant optical cable still is provided with aramid fiber layer and aluminium strip armor, can further improve fire behaviour and the intensity of fire-retardant optical cable.

Drawings

Fig. 1 is a schematic structural view of the flame-retardant optical cable of the present invention.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings.

As shown in fig. 1, the fire-retardant optical cable according to a preferred embodiment of the present invention includes a central reinforcement 1, a round sleeve releasing layer 2 twisted outside the central reinforcement 1, an inner sheath layer 3 disposed outside the sleeve releasing layer 2, a fire-retardant outer sheath layer 4 located on the outermost side of the fire-retardant optical cable, and a glass wool fire-resistant band 5 disposed between the inner sheath layer 3 and the fire-retardant outer sheath layer 4.

The central reinforcement 1 is arranged at the central position of the flame-retardant optical cable and used for providing a central supporting effect and improving the overall strength of the air-blowing micro cable. The central reinforcement 1 is preferably made of a non-metallic material, such as a composite of FRP, which is a good corrosion resistant material, having a good resistance to the atmosphere, water and acids, alkalis, salts and various oils and solvents of ordinary concentration. Two water-blocking yarns 10 are wound on the outer surface of the central strength member 1 to enhance the water-blocking performance of the flame-retardant optical cable.

The loose tube layer 2 is composed of 6 loose tubes 20 twisted outside the central reinforcement 1, and the 6 loose tubes 20 are closely distributed around the central reinforcement 1 to form a circular shape. The loose tube 20 is provided with core wires 21 therein, and the number of the core wires 21 is preferably 12. The loose tube 20 is filled with fiber paste 22, the fiber paste 22 can seal and protect the core wire 21, has waterproof and moisture-proof functions, and can play a buffering role when the flame-retardant optical cable is subjected to mechanical forces such as vibration, impact and bending. And cable paste 23 is filled between the loose tubes 2 to further prevent water from entering the optical cable, so that the waterproof performance is further improved.

The inner sheath layer 3 is made of PE material, and the flame-retardant outer sheath layer 4 is made of flame-retardant material, such as flame-retardant nylon, so that the flame-retardant optical cable has good flame-retardant performance. The glass wool fire-resistant belt 5 between the inner sheath layer 3 and the flame-retardant outer sheath layer 4 can further greatly improve the fire resistance, the glass wool fire-resistant belt 5 is made of fire-resistant glass wool, and the glass wool belongs to one category of glass fiber and is artificial inorganic fiber. The glass wool is a material obtained by fiberizing molten glass into a wool-like shape, and the chemical component of the glass wool is glass, and is an inorganic fiber. The novel heat-insulation sound-absorbing material has the advantages of good molding, small volume density, heat conductivity , heat insulation, sound-absorbing performance, corrosion resistance, stable chemical performance and a large number of tiny air holes, and plays roles of heat insulation, sound absorption, noise reduction, safety protection and the like, thereby ensuring smooth communication under the condition of fire.

Still be provided with aramid fiber layer 24 and aluminium strip armor 25 between loose tube layer 2 and inner sheath layer 3, wherein aramid fiber layer 24 sets up in loose tube layer 2 outside. The aramid fiber layer 24 is made of flame-retardant aramid fiber, belongs to high-temperature flame-retardant fiber and has excellent fireproof performance and tensile resistance; and the aluminum strip armor layer 25 can well strengthen the strength of the flame-retardant optical cable and improve the lateral pressure resistance of the flame-retardant optical cable.

The glass wool fire-resistant belt is arranged between the flame-retardant outer sheath layer and the inner sheath layer of the flame-retardant optical cable, so that the fireproof capacity of the flame-retardant optical cable is greatly improved, the difficulty of construction and laying is not increased under the condition of good flame-retardant effect, and better safety guarantee is provided for optical communication in areas with fire hazard in people groups such as mansions, residential buildings and the like; moreover, the utility model discloses a fire-retardant optical cable still is provided with aramid fiber layer and aluminium strip armor, can further improve fire behaviour and the intensity of fire-retardant optical cable.

It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A flame-retardant optical cable, characterized in that: it includes central reinforcement (1), twist in the outside round pine sleeve layer (2) of central reinforcement (1), set up in the outside inner sheath layer (3) of pine sleeve layer (2), set up in outermost fire-retardant oversheath layer (4) of fire-retardant optical cable and set up in inner sheath layer (3) with glass cotton refractory band (5) between fire-retardant oversheath layer (4).

2. The flame-retardant optical cable according to claim 1, wherein: the flame-retardant outer sheath layer (4) is made of flame-retardant nylon.

3. The flame-retardant optical cable according to claim 1, wherein: the anti-theft sleeve further comprises an aramid fiber layer (24) arranged outside the loose sleeve layer (2).

4. A flame-retardant optical cable according to claim 3, wherein: the composite cable further comprises an aluminum tape armor layer (25) arranged between the aramid fiber layer (24) and the inner sheath layer (3).

5. A flame-retardant optical cable according to any one of claims 1 to 4, wherein: the loose tube layer (2) comprises 6 loose tubes (20) stranded outside the central reinforcement (1).

6. The flame-retardant optical cable according to claim 5, wherein: the loose tube (20) is internally provided with a multi-core wire (21) and is filled with fiber paste (22).

7. The flame-retardant optical cable according to claim 5, wherein: cable paste (23) is filled between the loose tubes (20).

8. A flame-retardant optical cable according to any one of claims 1 to 4, wherein: it also comprises two water-blocking yarns (10) twisted outside the central reinforcement (1).