CN215988179U - High flame retardant data cable - Google Patents

Abstract

The utility model provides a high-flame-retardant data cable, wherein a first flame-retardant layer, a first shielding layer and a first sheath of the high-flame-retardant data cable are sequentially arranged around a lead, and the first flame-retardant layer is formed by any one of ceramic silicon rubber, high-oil-resistance low-smoke halogen-free flame-retardant cross-linked polyolefin and refractory fiber; the number of the leads is at least 4, the leads are twisted around the grounding wire in the right direction, the cable core is sequentially and longitudinally wrapped by the first insulating layer and the second flame-retardant layer of the lead package, and the second flame-retardant layer is a low-smoke halogen-free polyolefin sheath. The cable is internally provided with the two flame-retardant layers, the flame-retardant performance of the cable is improved by utilizing the double-layer flame-retardant structure, and the flame-retardant layers are formed by the halogen-free materials, so that dense smoke and toxic gas generated during combustion of the cable are avoided, the pollution to the environment is reduced, the harm to surrounding electrical equipment and rescue personnel can be reduced, the fire-extinguishing rescue work is facilitated, and the safety of the cable is improved.

Description

High flame retardant data cable

Technical Field

The utility model relates to the field of communication cables, in particular to a high-flame-retardant data cable.

Background

The data cable is the transmission medium of the broadband access network known at present, and has the advantages of low manufacturing cost, simple structure, good expandability, convenient network upgrade and the like.

The existing data cable generally has the common problem of poor flame retardance, and with the continuous improvement of the importance of the society on safety and environmental protection, common data cables without flame retardance can be gradually faded out for occasions such as high-rise buildings, public venues, public entertainment facilities, subways, stations, air ports, petroleum, hospital chemical industry and even nuclear power stations.

However, most of flame-retardant cables in the market are provided with a layer of flame-retardant structure, the flame-retardant performance is poor, the spread of fire cannot be well prevented, and the flame-retardant structure contains halogen, so that a large amount of concentrated smoke and halogen acid gas can be released when the cable is burnt, the halogen acid gas has corrosive harm to surrounding electrical equipment, and rescuers need to bring gas masks to be close to the scene to extinguish fire. When the cable burns, the cable causes damage to surrounding electrical equipment and rescue workers, and is not beneficial to fire-extinguishing rescue work, so that serious secondary damage is caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the high-flame-retardant data cable, two flame-retardant layers are arranged in the cable, the flame-retardant performance of the cable is improved by utilizing a double-layer flame-retardant structure, the flame-retardant layers are formed by halogen-free materials, the cable is prevented from generating dense smoke and toxic gas during combustion, the pollution to the environment is reduced, the harm to surrounding electrical equipment and rescue workers can be reduced, the fire-extinguishing and rescue work is facilitated, and the safety of the cable is improved.

In order to solve the above problems, the present invention adopts a technical solution as follows: a high flame retardant data cable, comprising: the cable comprises a wire, a grounding wire, a first flame-retardant layer, a first shielding layer and a first sheath, wherein the first flame-retardant layer, the first shielding layer and the first sheath are arranged around the wire in sequence, and the first flame-retardant layer is formed by any one of ceramic silicon rubber, high-oil-resistance low-smoke halogen-free flame-retardant cross-linked polyolefin and refractory fiber; the quantity of wire is 4 at least to encircle the earth connection right direction transposition, the wire includes the fire-retardant layer of second, first insulation layer and cable core, first insulation layer, the fire-retardant layer of second are vertical parcel in proper order the cable core, the fire-retardant layer of second is low smoke and zero halogen polyolefin sheath.

Further, the first sheath is a composite PUR polyurethane sheath, and the thickness of the first sheath is 1.2 mm.

Further, the first shielding layer is a double-sided self-adhesive aluminum foil, and the first flame-retardant layer and the first sheath are bonded through the first shielding layer.

Further, the first insulating layer is a high-density foamed polyethylene insulating layer.

Further, the high-flame-retardant data cable further comprises a filling layer, wherein the filling layer is arranged between the conducting wire and the first flame-retardant layer and fills a gap between the conducting wire and the first flame-retardant layer.

Further, the thickness of the double-sided self-adhesive aluminum foil is 0.06 mm.

Further, the high flame retardant data cable further comprises a cable tie, wherein the cable tie surrounds the conducting wire, and the conducting wire and the grounding wire are fixed through the cable tie.

Further, the number of the wires is 6.

Further, the stranding pitch of the wires is 17-19 times the outer diameter of the wires.

Further, the diameter of the cable core is 1.8 mm.

Compared with the prior art, the utility model has the beneficial effects that: set up two-layer fire-retardant layer in cable inside, utilize double-deck fire-retardant structure, improved the fire behaviour of cable to, constitute fire-retardant layer through halogen-free material, avoid the cable to produce dense cigarette and poison gas when burning, reduced the pollution to the environment, can alleviate the harm that causes for surrounding electrical equipment and rescue personnel, the rescue work of being convenient for put out a fire, improved the security of cable.

Drawings

FIG. 1 is a cross-sectional view of one embodiment of a high flame-retardant data cable of the present invention.

In the figure: 1. a first sheath; 2. a first shielding layer; 3. a first flame retardant layer; 4. a ground line; 53. a second flame retardant layer; 52. a first insulating layer; 51. and a cable core.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

Referring to fig. 1, fig. 1 is a cross-sectional view of an embodiment of a high flame-retardant data cable according to the present invention, wherein the cross-sectional view of fig. 1 is a transverse cross-sectional view of the high flame-retardant data cable, and the high flame-retardant data cable according to the present invention is described in detail with reference to fig. 1.

In this embodiment, the high flame retardant data cable includes: the cable comprises a lead, a grounding wire 4, a first flame-retardant layer 3, a first shielding layer 2 and a first sheath 1, wherein the first flame-retardant layer 3, the first shielding layer 2 and the first sheath 1 are sequentially arranged around the lead, and the first flame-retardant layer 3 is formed by any one of ceramic silicon rubber, high-oil-resistance low-smoke halogen-free flame-retardant cross-linked polyolefin and refractory fiber; the number of wire is 4 at least to encircle 4 right-hand twists of earth connection, the wire includes fire-retardant layer 53 of second, first insulating layer 52 and cable core 51, and first insulating layer 52, fire-retardant layer 53 of second vertically wrap up cable core 51 in proper order, and fire-retardant layer 53 of second forms through the crowded mode of wrapping of low smoke and zero halogen polyolefin.

In this embodiment, the first sheath 1 is a composite PUR polyurethane sheath with a thickness of 1.2mm, and in other embodiments, the first sheath 1 may also be made of low smoke halogen-free polyolefin material, polyvinyl chloride, high density polyethylene, rubber, silicon rubber, and other flame retardant materials.

In this embodiment, the first shielding layer 2 is a double-sided self-adhesive aluminum foil, and the first flame retardant layer 3 and the first sheath 1 are bonded through the first shielding layer 2.

In other embodiments, the first shielding layer 2 may also be any one of a tinned copper wire braid, an aluminum magnesium alloy braid, and a copper wire braid, where the braid may also have a braid density of 90%, 96%, and other braid densities capable of shielding electromagnetic interference.

In this embodiment, the high flame retardant data cable further comprises a filling layer disposed between the conductive wire and the first flame retardant layer 3 and filling a gap between the conductive wire and the first flame retardant layer 3. Wherein, the filling layer can be composed of flame-retardant polyolefin, glass fiber, inorganic paper rope and other flame-retardant materials.

In this embodiment, the thickness of the double-sided self-adhesive aluminum foil is 0.06mm, and in other embodiments, it may also be 0.03mm, 0.05mm, or other values not greater than 0.07mm, which is not limited herein.

In the present embodiment, the first insulating layer 52 is a high-density foamed polyethylene insulating layer, wherein the first insulating layer 52 has a skin-foam-skin structure, and the high-density polyethylene insulating layer is formed by high-pressure nitrogen injection extrusion.

In other embodiments, the first insulating layer 52 may be an insulating structure made of chemically foamed polyethylene, and may be made of one or more materials such as foamed polyurethane, foamed polyvinyl chloride, foamed polystyrene, and foamed phenolic resin.

In this embodiment, the high flame retardant data cable further comprises a cable tie, the cable tie surrounds the conducting wire, and the conducting wire and the grounding wire 4 are fixed through the cable tie.

In this embodiment, the grounding wire 4 is a copper wire, and in other embodiments, the grounding wire 4 may also be made of aluminum, iron, aluminum alloy, or other conducting wire materials.

In a preferred embodiment, the cable ties are formed of HDPE insulating material, and have different colors and identification numbers by which the type and length of the cable core 51 is identified.

In the present embodiment, the number of wires is 6. In other embodiments, the number of wires may also be 4, 5, or other numbers, which are not limited herein.

In the embodiment, the stranding pitch of the wires is 17-19 times of the outer diameter of the wires, so that the flexibility of the whole cable is ensured through the stranding pitch, and the adaptability of the cable to a narrow space is improved.

In this embodiment, the material constituting the cable core 51 is a copper wire, wherein the copper wire may be a single copper wire or a twisted plurality of copper wires, and in other embodiments, the material constituting the cable core 51 may be aluminum, aluminum alloy, or other materials capable of transmitting data.

In a preferred embodiment, the cable core 51 is formed by twisting at least 16 copper wires with a twist pitch of 11-13 times the outer diameter of the cable core 51.

Has the advantages that: according to the high-flame-retardant data cable, the two flame-retardant layers are arranged inside the cable, the flame-retardant performance of the cable is improved by utilizing the double-layer flame-retardant structure, the flame-retardant layers are made of halogen-free materials, the cable is prevented from generating dense smoke and toxic gas during combustion, the pollution to the environment is reduced, the harm to surrounding electrical equipment and rescue workers can be reduced, the fire-fighting and rescue work is facilitated, and the safety of the cable is improved.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A high flame retardant data cable, wherein the high flame retardant data cable comprises: the cable comprises a wire, a grounding wire, a first flame-retardant layer, a first shielding layer and a first sheath, wherein the first flame-retardant layer, the first shielding layer and the first sheath are arranged around the wire in sequence, and the first flame-retardant layer is formed by any one of ceramic silicon rubber, high-oil-resistance low-smoke halogen-free flame-retardant cross-linked polyolefin and refractory fiber;

the quantity of wire is 4 at least to encircle the earth connection right direction transposition, the wire includes the fire-retardant layer of second, first insulation layer and cable core, first insulation layer, the fire-retardant layer of second are vertical parcel in proper order the cable core, the fire-retardant layer of second is low smoke and zero halogen polyolefin sheath.

2. The high flame retardant data cable of claim 1, wherein the first jacket is a composite PUR polyurethane jacket having a thickness of 1.2 mm.

3. The high flame retardant data cable of claim 1, wherein the first shielding layer is a double-sided self-adhesive aluminum foil, and the first flame retardant layer and the first jacket are bonded by the first shielding layer.

4. The high flame retardant data cable of claim 1, wherein the first insulating layer is a high density foamed polyethylene insulating layer.

5. The high flame retardant data cable of claim 1, further comprising a filler layer disposed between the conductive wire and the first flame retardant layer and filling the space between the conductive wire and the first flame retardant layer.

6. The high flame retardant data cable of claim 3, wherein the double-sided self-adhesive aluminum foil is 0.06mm thick.

7. The high flame retardant data cable of claim 1, further comprising a cable tie, wherein the cable tie surrounds the conductive wire, and the conductive wire and the ground wire are secured by the cable tie.

8. The high flame retardant data cable of claim 1, wherein the number of wires is 6.

9. The high flame retardant data cable of claim 8 wherein the conductor has a lay pitch of 17-19 times the outer diameter of the conductor.

10. The high flame retardant data cable of claim 1, wherein the diameter of the core is 1.8 mm.

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