CN209821447U - High-temperature-resistant flame-retardant optical fiber cable - Google Patents

Abstract

The utility model belongs to the technical field of the fiber optic cable technique and specifically relates to a fire-retardant fiber optic cable of high temperature resistant, including the optical cable core, the optical cable core has four at least, just the optical cable core surface scribbles the TPEE coating, the optical cable core encircles around the reinforcement, the outside parcel of optical cable core has the water blocking layer, the outside parcel of water blocking layer has interior fire-retardant layer and outer fire-retardant layer, outer fire-retardant layer outside is glued and is had high temperature resistant layer, the high temperature resistant layer outside parcel one deck sheath. The high-temperature resistant flame-retardant optical fiber cable can not only improve the strength of the optical cable, but also reduce the deformation degree of the optical cable after being erected; the TPEE coating is used for improving the strength of the optical fiber and reducing the fracture probability of the optical fiber in the assembling process; the heat resistance and the fire resistance of the optical cable are improved through the high-temperature resistant layer, and the service life of the device in some extreme environments is prolonged.

Description

High-temperature-resistant flame-retardant optical fiber cable

Technical Field

The utility model relates to an optical fiber cable technical field especially relates to a fire-retardant optical fiber cable of high temperature resistant.

Background

Fiber optic cables are being used in more and more locations. When a fire disaster happens, the common optical cable has the defects of poor compression resistance and tensile strength, no flame retardance, no fire resistance and the like, so that the common optical cable is damaged due to the damage of a big fire, and the phenomena of water spraying and the like in the rescue process can be eliminated due to the knocking of heavy objects, falling object impact and the like, so that the transmission performance is influenced, and even the signal transmission is interrupted. And a large amount of acid gas smoke is generated during combustion, which directly damages human health. The general fire-resistant optical cable adopts a layer-stranded structure, and the fiber paste and the metal belt are used as water-blocking and fire-resistant elements, so that the defects of the common optical cable are overcome, the new problems of damage to human health, environmental pollution and the like caused by the use of the fiber paste are increased, and the large size and the heavy weight of the optical cable are also increased due to the fire resistance of the cable core layer-stranded and the metal belt, so that the installation and construction of the optical cable are very inconvenient.

The traditional optical cable sheath is made of polyethylene, the melting point of the polyethylene is 100-130 ℃, the low-temperature resistance of the polyethylene is excellent, the polyethylene can still maintain good mechanical property at-60 ℃, and the use temperature of the polyethylene is 80-110 ℃. Therefore, the traditional cable sheath has poor flame retardance and is not suitable for high-temperature special environments.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists optical fiber cable among the prior art and can not resist high temperature, flame retardant efficiency is poor, and the fire-retardant optical fiber cable of a high temperature resistant that proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the design is a high-temperature-resistant flame-retardant optical fiber cable which comprises an optical cable core, wherein the number of the optical cable core is at least four, a TPEE coating is coated on the outer surface of the optical cable core, the optical cable core surrounds the periphery of a reinforcement, a water-blocking layer is wrapped outside the optical cable core, an inner flame-retardant layer and an outer flame-retardant layer are wrapped outside the water-blocking layer, a high-temperature-resistant layer is adhered to the outer side of the outer flame-retardant layer, and a sheath is wrapped outside the high-temperature-resistant layer.

Preferably, the optical cable cores are uniformly distributed by taking the reinforcing part as a circle center, and the optical cable cores are contacted with the reinforcing part.

Preferably, the gap inside the waterproof layer is filled with aramid fibers.

Preferably, the outer side of the sheath is coated with a waterproof coating.

The utility model provides a pair of fire-retardant fiber optic cable of high temperature resistant, beneficial effect is in: the high-temperature-resistant flame-retardant optical fiber cable can improve the strength of the optical cable and reduce the deformation degree of the optical cable after erection through the reinforcing piece; the TPEE coating is used for improving the strength of the optical fiber and reducing the fracture probability of the optical fiber in the assembling process; the heat resistance and the fire resistance of the optical cable are improved through the high-temperature resistant layer, and the service life of the device in some extreme environments is prolonged.

Drawings

Fig. 1 is a cross-sectional view of the high temperature resistant and flame retardant optical fiber cable of the present invention.

In the figure: the cable comprises a reinforcement 1, an optical cable core 2, a TPEE coating 3, aramid fibers 4, a water-blocking layer 5, an inner flame-retardant layer 6, an outer flame-retardant layer 7, a high-temperature-resistant layer 8 and a sheath 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, the high temperature resistant flame retardant optical fiber cable comprises a cable core 2, at least four cable cores 2, and a TPEE coating 3 coated on the outer surface of the cable core 2, wherein the TPEE is a block copolymer comprising a polyester hard segment and a polyether soft segment. Wherein the soft polyether segment and the uncrystallized polyester form amorphous phase polyester hard segment and are partially crystallized to form crystalline micro-regions which play the role of physical crosslinking points. TPEE has elasticity of rubber and strength of engineering plastics; the soft segment endows the rubber with elasticity, and the hard segment endows the rubber with processability; compared with rubber, the rubber has better processing performance and longer service life; compared with engineering materials, the material has the characteristics of high strength, and better flexibility and dynamic mechanical property. TPEE has excellent oil resistance and is resistant to most polar liquid chemical media (e.g., acids, bases, amine glycols) at room temperature; the TPEE has excellent heat resistance, basically has no weight loss when being continuously heated for 10 hours at 110-140 ℃, is heated for 10 hours at 160 ℃ and 180 ℃ respectively, and has the weight loss of only 0.05 percent and 0.1 percent, so the TPEE can be used at more than 150 ℃, has the tensile strength far higher than that of the TPU, and also has excellent low-temperature resistance, and most of the TPEE can be used for a long time at-40 ℃. Due to the balance performance of the TPEE at high and low temperatures, the working temperature range of the TPEE is very wide, and the TPEE can be used at minus 60-200 ℃. The TPEE has the structural strength 2-6 times that of vulcanized rubber, and has the advantages of wear resistance, flex resistance, oil resistance and the like. The relative density is about 1.2, the mechanical strength is good, the tensile strength is greater than 30Mpa, the elasticity is 3-6 times of that of engineering plastics, and the bending strength and the tearing strength are respectively 6-12 times and 2-10 times of those of natural rubber; at low temperature, the elastic recovery is good.

The optical cable core 2 is uniformly distributed by taking the reinforcing part 1 as a circle center, the optical cable core 2 is in contact with the reinforcing part 1, and a plurality of strands of thin steel wires are stranded outside the glass fiber of the reinforcing part 1 as a center, so that the deformation resistance of the optical cable in actual use is improved, and the service life is prolonged.

The optical cable core 2 surrounds the reinforcement 1, a water-blocking layer 5 wraps the optical cable core 2, aramid fibers 4 are filled in a gap inside the water-blocking layer 5, an inner flame-retardant layer 6 and an outer flame-retardant layer 7 wrap the water-blocking layer 5, the inner flame-retardant layer 6 and the outer flame-retardant layer 7 are formed by winding and coating a ceramic vulcanized silicone rubber composite belt, a high-temperature-resistant layer 8 is glued on the outer side of the outer flame-retardant layer 7, a sheath 9 wraps the outer side of the high-temperature-resistant layer 8, and a waterproof coating is coated on the outer side of the sheath 9. The water-resisting layer 5 and the high-temperature-resistant layer 8 are both made of polytetrafluoroethylene, and the polytetrafluoroethylene has the characteristics of acid resistance, alkali resistance and various organic solvents resistance and is almost insoluble in all solvents. Meanwhile, the polytetrafluoroethylene has good sealing property and high temperature resistance; the polytetrafluoroethylene is widely applied to various occasions needing acid-base resistance and organic solvents, has the advantages of sealing property, high lubrication non-adhesiveness, electrical insulation property, good ageing resistance and excellent temperature resistance, and can work for a long time at minus 180-250 ℃; it also has good mechanical toughness and electrical insulation, and can resist 1500V high voltage electricity. The polytetrafluoroethylene film is used as the high-temperature-resistant waterproof layer 5, so that the sealing performance of the optical fiber cable is improved, and the phenomenon that the whole link is drained and scrapped due to accidental water seepage of the optical cable is avoided. Compared with the conventional waterproof material, the polytetrafluoroethylene film can work at-180-250 ℃ for a long time, is insoluble in all solvents, enhances the high-temperature resistance and corrosion resistance of the optical cable, and prolongs the service life of the optical cable.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (4)

1. The utility model provides a high temperature resistant fire-retardant fiber optic cable, includes cable core (2), its characterized in that: the optical cable comprises at least four optical cable cores (2), wherein TPEE coatings (3) are coated on the outer surfaces of the optical cable cores (2), the optical cable cores (2) surround the reinforcement (1), a water-blocking layer (5) is wrapped outside the optical cable cores (2), an inner flame-retardant layer (6) and an outer flame-retardant layer (7) are wrapped outside the water-blocking layer (5), a high-temperature-resistant layer (8) is glued on the outer side of the outer flame-retardant layer (7), and a sheath (9) is wrapped on the outer side of the high-temperature-resistant layer (8).

2. The high-temperature-resistant flame-retardant optical fiber cable according to claim 1, wherein the optical cable cores (2) are uniformly distributed around the strength member (1), and the optical cable cores (2) are in contact with the strength member (1).

3. The high-temperature-resistant flame-retardant optical fiber cable according to claim 1, wherein the gap inside the water-resistant layer (5) is filled with aramid fibers (4).

4. A high temperature resistant flame retardant optical fiber cable according to claim 1, wherein the outside of the sheath (9) is coated with a waterproof coating.