Central beam tube type high-temperature-resistant high-strength optical cable

Abstract

The utility model belongs to the technical field of optical cables, and discloses a central beam tube type high-temperature-resistant high-strength optical cable, which comprises an optical fiber, a compression-resistant elastic body is sleeved on the periphery of the optical fiber, the optical fiber is tightly wrapped by the compression-resistant elastic body, an inner protection layer is extruded outside the compression-resistant elastic body, a tensile unit is arranged outside the inner protection layer, and the tensile unit is connected with the optical fiber. An inner protection layer is extruded on the periphery of the tensile unit, an outer protection layer is extruded on the periphery of the tensile unit, the optical fibers comprise a plurality of colored optical fibers with different colors, the compression-resistant elastomer is a PBT loose tube, a space between the PBT loose tube and the optical fibers is filled with fiber paste, and the inner protection layer and the outer protection layer are fluoroplastic heat insulation protection layers. The periphery of the optical fiber is wrapped by the high-strength PBT loose tube, the tensile property and the compression resistance are good, the aramid fiber braid layer is arranged between the two fluoroplastic heat insulation protection layers, the tensile property and the bending resistance are improved, and in addition, the heat insulation effect of the two fluoroplastic heat insulation protection layers is better than that of the single fluoroplastic heat insulation protection layer.

Description

Technical Field

[0001] This utility model belongs to the field of optical cable technology, specifically relating to a central loose tube type high temperature and high strength optical cable. Background Technology

[0002] With the booming development of the communications industry, telephone services in communications networks are showing a steady growth trend, while data services are showing an exponential growth trend. Multimedia such as voice, data, and images all need to be transmitted, so a larger network capacity and wider bandwidth are required. Optical-electric composite cables are suitable for use as transmission lines in broadband access network systems. They are a new type of access method that can solve problems related to broadband access, equipment power consumption, and signal transmission.

[0003] The quality of existing optical cables on the market is poor, with poor heat insulation and weak tensile and compressive strength, and there is still room for improvement. Utility Model Content

[0004] The purpose of this invention is to provide a centrally bundled tube type high-temperature and high-strength optical cable to solve the problems mentioned in the background art, such as poor heat insulation and weak tensile and compressive strength of existing optical cables.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a central loose tube type high temperature and high strength optical cable, including an optical fiber, a compression-resistant elastomer is sleeved around the optical fiber, the optical fiber is tightly wrapped by the compression-resistant elastomer, an inner protective layer is extruded on the outside of the compression-resistant elastomer, a tensile unit is provided on the outside of the inner protective layer, and an outer protective layer is extruded on the outside of the tensile unit.

[0006] Preferably, the optical fiber comprises multiple colored optical fibers of different colors.

[0007] Preferably, the compressive elastomer is a PBT loose sleeve.

[0008] Preferably, the space between the PBT loose tube and the optical fiber is filled with fiber grease.

[0009] Preferably, both the inner and outer protective layers are fluoroplastic heat-insulating protective layers.

[0010] Preferably, the tensile unit is an aramid braided layer.

[0011] Preferably, the optical fiber has 4, 6, 8, 9, 12, 18, or 24 cores.

[0012] Preferably, the optical fiber is placed at the center of the optical cable.

[0013] Preferably, the fiber optic cable type includes G652D, G657A1, G657A2, G657B3, OM2, OM3-300, OM3-500 or 62.5 / 125.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) The optical fiber of this utility model is wrapped with high-strength PBT loose tube, which has good tensile and compressive strength. An aramid braided layer is set in the middle of the two fluoroplastic heat insulation protection layers, which improves the tensile and bending performance. In addition, the two-layer fluoroplastic heat insulation protection is better than the single-layer fluoroplastic heat insulation effect, avoiding direct heat conduction. The aramid braided layer in the middle not only has tensile strength, but also plays a better role in heat insulation, eliminating cold bridges, ensuring heat insulation effect, and improving the bending performance of the entire structure.

[0016] (2) During use, this utility model protects the optical fiber inside the PBT loose tube perfectly and keeps it intact during the high temperature and high pressure vulcanization process. Moreover, in actual use, the optical unit in the optical cable has excellent tensile and bending resistance performance and there is no damage to the optical cable caused by bending and stretching. Attached Figure Description

[0017] Figure 1 This is a perspective view of the optical cable of this utility model;

[0018] Figure 2 This is a schematic diagram of the optical cable structure of this utility model;

[0019] In the diagram: 1. Optical fiber; 2. Compression elastomer; 3. Inner protective layer; 4. Tensile unit; 5. Outer protective layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-2 As shown, this utility model provides a technical solution: a central loose tube type high temperature and high strength optical cable, including an optical fiber 1, a compression-resistant elastomer 2 is sleeved around the optical fiber 1, the optical fiber 1 is tightly wrapped by the compression-resistant elastomer 2, an inner protective layer 3 is extruded on the outside of the compression-resistant elastomer 2, a tensile unit 4 is provided on the outside of the inner protective layer 3, and an outer protective layer 5 is extruded on the outside of the tensile unit 4.

[0022] Optical fiber 1 consists of multiple colored optical fibers of different colors;

[0023] The compressive elastomer 2 is a PBT loose tube, and the outer periphery of the optical fiber 1 is wrapped with a high-strength PBT loose tube, which has good tensile and compressive strength.

[0024] The space between the PBT loose tube and optical fiber 1 is filled with fiber grease, which serves two protective functions: preventing moisture intrusion and providing mechanical buffering.

[0025] Both the inner protective layer 3 and the outer protective layer 5 are fluoroplastic thermal insulation protective layers. The use of two layers of fluoroplastic thermal insulation protective layers provides better thermal insulation than a single layer of fluoroplastic, thus avoiding direct heat conduction.

[0026] Tensile unit 4 is an aramid braided layer. An aramid braided layer is set between two fluoroplastic thermal insulation protective layers, which improves both tensile and bending properties. The aramid braided layer in the middle not only provides tensile strength but also plays a better role in thermal insulation, eliminating cold bridges, ensuring thermal insulation effect, and improving the bending performance of the entire structure.

[0027] The number of cores in fiber optic cable 1 can be 4, 6, 8, 9, 12, 18, or 24.

[0028] Fiber 1 is placed at the center of the optical cable.

[0029] The fiber optic cable types for Fiber Optic 1 include G652D, G657A1, G657A2, G657B3, OM2, OM3-300, OM3-500, or 62.5 / 125.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A central bundle tube type high temperature resistant high strength optical cable, characterized by, It comprises optical fibers (1), the periphery of the optical fibers (1) is provided with a compression elastic body (2), the optical fibers (1) are tightly wrapped by the compression elastic body (2), the outer part of the compression elastic body (2) is extruded with an inner protective layer (3), the outer part of the inner protective layer (3) is provided with a tensile unit (4), the periphery of the tensile unit (4) is extruded with an outer protective layer (5); The optical fibers (1) comprise a plurality of colored optical fibers with different colors; The compression elastic body (2) is a PBT loose sleeve; The space between the PBT loose sleeve and the optical fibers (1) is filled with fiber paste; The inner protective layer (3) and the outer protective layer (5) are fluoroplastic heat insulation protective layers; The tensile unit (4) is an aramid woven layer.

2. A high temperature resistant high strength optical cable with central bundle tube according to claim 1, characterized in that: The core number of the optical fibers (1) is 4 cores, 6 cores, 8 cores, 9 cores, 12 cores, 18 cores or 24 cores.

3. The high strength, high temperature resistant cable of claim 1, wherein: The optical fibers (1) are arranged at the center position of the optical cable.

4. The high strength, high temperature resistant cable of claim 1, wherein: The optical fiber line types of the optical fibers (1) include G652D, G657A1, G657A2, G657B3, OM2, OM3-300, OM3-500 or 62.5 / 125.

Images