Fire-resistant flame-retardant special cable used in severe environment

Abstract

The utility model discloses a fire-resistant flame-retardant special cable for a severe environment, which comprises an outer protective layer, a waterproof layer, a metal protective layer, a first protective layer, a second protective layer and a filling layer which are sequentially arranged from outside to inside, a plurality of cable cores are arranged in the filling layer, and an optical fiber unit is also arranged in the filling layer. The cable disclosed by the utility model has relatively good insulating property, high temperature resistance and fire-resistant and flame-retardant properties, the cable can keep stable operation for a relatively long time under the condition of a fire disaster, and the halogen-free low-smoke flame-retardant material is adopted, so that the pollution to the environment is reduced, and the cable can still keep stable performance in a severe environment. The optical fiber unit not only provides a data transmission function, but also enhances the durability and damage resistance of the optical fiber through the protection of the stainless steel tube and the optical fiber ointment, thereby ensuring that the signal can still be stably transmitted in a severe environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable field more specifically, relate to a kind of fire-resistant flame-retardant special cable for harsh environment. BACKGROUND

[0002] Cables play a crucial role in modern society, and are widely used in power, communication, data, transportation, industry, construction, home and entertainment fields. As an important tool for transmitting power, signals and data, the environmental adaptability of cables is crucial to ensure the stable operation of electrical systems and signal transmission systems.

[0003] The insulation material used in existing cables is prone to aging, softening or failure in high temperature environments, leading to a decrease in insulation performance, and even causing short circuits or fires. In harsh environments, the insulation layer and sheath material of traditional cables may not withstand high temperatures, leading to a decrease in cable performance or damage. Some cables are prone to rapid combustion in fires, causing the fire to spread and increasing the harmfulness of the fire. Some cables produce a large amount of toxic smoke when burning, which seriously affects personnel evacuation and rescue. Some cables are also prone to moisture or water seepage in humid environments, causing damage to the internal structure of the cable and affecting the electrical performance and operational stability of the cable. SUMMARY

[0004] The utility model aims at overcoming the defects of prior art, provide a kind of fire-resistant flame-retardant special cable for harsh environment.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a cable, comprising outer sheath, water barrier layer, metal sheath, first protective layer, second protective layer and filling layer arranged from outside to inside, the filling layer has a plurality of cable cores, the cable core comprises conductor, insulation layer and inner sheath from inside to outside, the filling layer is further provided with optical fiber unit, the optical fiber unit comprises stainless steel pipe and optical fiber in stainless steel pipe, the stainless steel pipe is filled with optical fiber ointment, the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin material, the first protective layer is made of halogen-free flame-retardant tape, the second protective layer is made of synthetic mica tape, the insulation layer is made of composite of gold mica tape and synthetic mica tape, and the inner sheath is made of halogen-free low-smoke flame-retardant material.

[0006] Further, a plurality of cable cores are arranged in a ring shape at equal intervals.

[0007] Thus, the overall stability of the cable is improved.

[0008] Further, the cable core has 5, and the 5 cable cores surround the optical fiber unit.

[0009] Thus, a compact and orderly structure is formed, which not only ensures the reliability of data transmission, but also improves the overall performance of the cable.

[0010] Further, the water-blocking layer adopts an aluminum-plastic composite tape.

[0011] Thus, the cable has excellent water-blocking performance, which can effectively prevent moisture from penetrating into the cable and protect the stable operation of the cable in a humid environment.

[0012] Further, the metal sheath adopts a corrugated copper pipe.

[0013] Thus, the corrugated copper pipe not only provides good mechanical protection and enhances the durability of the cable, but also has an electromagnetic shielding function, which reduces the influence of external electromagnetic interference on the signal transmission of the cable.

[0014] Further, the metal sheath is welded by an argon arc welding process.

[0015] Further, the conductor adopts an electrical round copper wire.

[0016] Thus, the cable has good electrical conductivity.

[0017] Further, the synthetic mica tape is a phlogopite tape.

[0018] Compared with the prior art, the cable has the beneficial effects that:

[0019] 1. The cable has good insulation performance, high-temperature resistance and fire-retardant performance, can maintain stable operation for a long time in a fire, and uses a halogen-free low-smoke flame-retardant material to reduce environmental pollution and maintain stable performance in a harsh environment.

[0020] 2. The cable has a data transmission function, and the stainless steel pipe and optical fiber grease protect the optical fiber, enhance the durability and damage resistance of the optical fiber, and ensure stable signal transmission in a harsh environment.

[0021] 3. The cable has good water-blocking performance, which effectively prevents moisture penetration and protects the internal structure of the cable from moisture erosion.

[0022] 4. The cable has a corrugated copper pipe metal sheath that provides an electromagnetic shielding function, which reduces the influence of external electromagnetic interference on the signal transmission of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a schematic diagram of the cable structure;

[0024] Fig. 2 is an enlarged view of the A area;

[0025] Fig. 3 is a cross-sectional view of the cable.

[0026] Legend: outer sheath 1; water barrier layer 2; metal sheath 3; first protective layer 4; second protective layer 5; filling layer 6; inner sheath 7; insulating layer 8; conductor 9; stainless steel tube 10; optical fiber 11. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] The utility model provides a kind of fire-resistant flame-retardant special cable for severe environment as shown in Figs. 1-3 It includes outer sheath 1, water barrier layer 2, metal sheath 3, first protective layer 4, second protective layer 5 and filling layer 6 arranged in turn from outside to inside, and the filling layer 6 has multiple cable cores, and the cable core includes conductor 9, insulating layer 8 and inner sheath 7 in turn from inside to outside, and the filling layer 6 is also provided with optical fiber unit, and the optical fiber unit includes stainless steel tube 10 and optical fiber 11 in stainless steel tube 10, and the stainless steel tube 10 is filled with optical fiber ointment, and the outer sheath 1 is made of low-smoke halogen-free flame-retardant polyolefin material, the first protective layer 4 is made of halogen-free flame-retardant tape, the second protective layer 5 is made of synthetic mica tape, the insulating layer 8 is made of composite of gold mica tape and synthetic mica tape, and the inner sheath 7 is made of halogen-free low-smoke flame-retardant material.

[0029] Multiple cable cores are distributed in ring shape at equal intervals. The cable core has 5, and the 5 cable cores surround the optical fiber unit. The water barrier layer 2 is made of aluminum-plastic composite tape. The metal sheath 3 is made of corrugated copper pipe. The conductor 9 is made of electrical round copper wire.

[0030] Working Principle: The cable of this application has an outer sheath made of low-smoke halogen-free flame-retardant polyolefin material. It produces very little smoke and toxic gases during combustion and possesses excellent flame-retardant properties, effectively reducing secondary damage in a fire while protecting the internal structure of the cable from external environmental influences. The water-blocking layer is made of aluminum-plastic composite tape, which has excellent water-blocking properties, effectively preventing moisture from penetrating into the cable and protecting its stable operation in humid environments. The metal sheath uses corrugated copper tubing, which not only provides good mechanical protection and enhances the cable's durability but also has electromagnetic shielding capabilities, reducing the impact of external electromagnetic interference on cable signal transmission. The first protective layer uses halogen-free flame-retardant tape, further enhancing the cable's flame-retardant performance and ensuring that the cable will not burn rapidly in a fire, buying more time for rescue. The second protective layer uses synthetic mica tape, which, due to its excellent high-temperature resistance, maintains structural stability in high-temperature environments, providing additional protection for the cable. The insulation layer is composed of a composite of phlogopite mica tape and synthetic mica tape. This composite material combines the advantages of both, possessing good insulation performance, high-temperature resistance, and flame retardant properties. The fiber optic unit not only provides data transmission capabilities but also enhances the durability and damage resistance of the fiber optic cable through the protection of stainless steel tubing and fiber optic grease. This allows the cable to maintain stable performance even in harsh environments.

[0031] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A fire-resistant and flame-retardant special cable for harsh environments, characterized in that, The cable includes an outer sheath (1), a water-blocking layer (2), a metal sheath (3), a first protective layer (4), a second protective layer (5), and a filling layer (6) arranged sequentially from the outside to the inside. The filling layer (6) contains multiple cable cores, and each cable core includes a conductor (9), an insulation layer (8), and an inner sheath (7) arranged sequentially from the inside to the outside. The filling layer (6) also contains an optical fiber unit, which includes a stainless steel tube (10) and an optical fiber (11) located inside the stainless steel tube (10). The stainless steel tube (10) is filled with optical fiber grease. The outer sheath (1) is made of low-smoke halogen-free flame-retardant polyolefin material, the first protective layer (4) is made of halogen-free flame-retardant tape, the second protective layer (5) is made of synthetic mica tape, and the inner sheath (7) is made of halogen-free low-smoke flame-retardant material.

2. The fire-resistant and flame-retardant special cable for harsh environments according to claim 1, characterized in that, Multiple cable cores are distributed in a ring with equal spacing.

3. The fire-resistant and flame-retardant special cable for harsh environments according to claim 2, characterized in that, The cable core has 5 cores, and the 5 cores surround the optical fiber unit.

4. The fire-resistant and flame-retardant special cable for harsh environments according to claim 1, characterized in that, The water-blocking layer (2) is made of aluminum-plastic composite tape.

5. The fire-resistant and flame-retardant special cable for harsh environments according to claim 1, characterized in that, The metal sheath (3) is made of corrugated copper tubing.

6. The fire-resistant and flame-retardant special cable for harsh environments according to claim 1, characterized in that, The conductor (9) is made of electrical round copper wire.

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