CN219202826U - High-strength flame-retardant control cable for subway - Google Patents

Abstract

The utility model discloses a high-strength flame-retardant control cable for subways, which comprises a plurality of cable cores, a first wrapping layer, a shielding layer, a second wrapping layer, an oxygen-isolating layer, an armor layer and an outer sheath, wherein the first wrapping layer is arranged on the cable core; the first tape layer, the shielding layer, the second tape layer, the oxygen barrier layer, the armor and the outer sheath are sequentially coated from inside to outside. According to the scheme, the multi-layer flame-retardant structure is arranged, so that the multi-layer flame-retardant structure not only has the flexibility, flame retardance and electrical property of a common cable, but also has excellent flame retardance, and the reliability of the B1-level cable is further improved.

Description

High-strength flame-retardant control cable for subway

Technical Field

The utility model relates to the technical field of cables, in particular to a high-strength B1-level flame-retardant control cable for subways.

Background

Along with the rapid and steady development of national subway key engineering, particularly the subway stations are dense and congested, once the fire signs appear, the national property loss is caused, and the life safety of a plurality of people is threatened more seriously. With the continuous development and progress of society, the B1-level cable can be widely applied to densely populated public places such as high-rise buildings, markets, schools, subway stations, airports, stadiums, exhibition halls, hospitals and the like, and adds a safety for daily life of people; but the existing cable used for subway stations has simple structure and low reliability of fire prevention and moisture prevention.

It follows that how to further improve the reliability of B1 class cables is a matter of outcome in the art.

Disclosure of Invention

Aiming at the technical problem that the reliability of the existing B1-level cable is not high, the technical problem is that the control cable for the high-strength B1-level flame-retardant subway is provided, and the control cable has the flexibility, flame retardance and electrical property of a common cable, and also has excellent flame retardance, so that the reliability of the B1-level cable is further improved.

In order to achieve the aim, the high-strength flame-retardant control cable for the subway comprises a plurality of cable cores, a first wrapping layer, a shielding layer, a second wrapping layer, an oxygen-insulating layer, an armor layer and an outer sheath; the first tape layer, the shielding layer, the second tape layer, the oxygen barrier layer, the armor and the outer sheath are sequentially coated from inside to outside.

Further, the cable cores are arranged in a one-time lamination manner from inside to outside, and each cable core comprises a conductor, a fire-resistant layer and an insulating layer; the refractory layer covers the periphery of the conductor; the insulating layer is coated on the periphery of the fire-resistant layer.

Further, the conductor is a seven strand stranded tinned copper wire conductor.

Further, the fire-resistant layer is a fire-resistant mica tape layer.

Further, the insulating layer is an irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin insulating layer.

Further, a filling layer is arranged among the cable cores, and the filling layer is a high-temperature flame-retardant filling rope.

Further, the first belting layer is coated on the periphery of the cable core, and the first belting layer is a low-smoke halogen-free high-flame-retardance belting layer.

Further, the shielding layer is coated on the periphery of the first wrapping belt layer, and the shielding layer is a tinned copper wire braided shielding layer.

Further, the second wrapping band layer is wrapped on the periphery of the shielding layer, and the second wrapping band layer is reinforced non-woven fabric.

Further, the oxygen isolation layer is coated on the periphery of the second coating, and the oxygen isolation layer is an extrusion fireproof mud layer.

Further, the armor is coated on the periphery of the oxygen isolation layer, and the armor is a galvanized steel tape armor.

Further, the outer sheath is coated on the periphery of the armor layer, and the outer sheath is a B1-level low-smoke halogen-free flame-retardant polyolefin injection molding layer.

The high-strength B1-level flame-retardant subway control cable provided by the utility model has the advantages that the control cable has excellent flame-retardant performance besides the flexibility, flame retardance and electrical performance of a common cable by arranging the multi-layer flame-retardant structure, and the reliability of the B1-level cable is further improved.

Drawings

The utility model is further described below with reference to the drawings and the detailed description.

Fig. 1 is a schematic structural diagram of the high-strength flame-retardant control cable for subways.

The following is a description of the components in the drawings:

1. conductor 2, fire-resistant layer 3, insulating layer 4, filling layer 5, first band layer 6, shielding layer 7, second band layer 8, oxygen-insulating layer 9, armor layer 10 and protective sleeve.

Detailed Description

The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.

Aiming at the technical problem that the reliability of the existing B1-level cable is low, based on the technical problem, the scheme provides the high-strength B1-level flame-retardant control cable for the subway, which has excellent flame-retardant performance besides the flexibility, flame retardance and electrical performance of a common cable by arranging a multi-layer flame-retardant structure, and further improves the reliability of the B1-level cable.

Referring to fig. 1, the high-strength B1-level flame-retardant control cable for subways provided by the scheme comprises a plurality of cable cores, a first wrapping layer, a shielding layer, a second wrapping layer, an oxygen barrier layer, an armor layer and an outer sheath.

Wherein, a plurality of cable cores are from interior to outside two circles of once laminating settings of distribution, and every cable core includes conductor 1, flame retardant coating 2 and insulating layer 3.

The conductor 1 is preferably a seven-strand stranded tinned copper wire conductor, has good softness and is flexible, and can adapt to the working environment of the cable.

The fire-resistant layer 2 is coated on the periphery of the conductor 1, and the fire-resistant layer 2 is preferably a fire-resistant mica tape, is a high-performance mica insulation product, and has excellent high-temperature resistance and combustion resistance.

The insulating layer 3 is coated on the periphery of the fireproof layer, and the insulating layer 3 is preferably an irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin insulating layer, and the structure has the advantages of good temperature resistance level, large current-carrying capacity, increased insulating resistance, long service life, strong overload capacity, environmental protection and safety.

Meanwhile, the filling layer 4 is arranged among the cable cores, the filling layer 4 is preferably a high-temperature flame-retardant filling rope, the structure can provide the roundness of the cable, the material does not contain asbestos, halogen and other harmful substances, the weight is light, and the material is an environment-friendly material and has obvious flame-retardant effect.

The first wrapping layer 5 is wrapped on the periphery of the cable core, is preferably a low-smoke halogen-free high-flame-retardant wrapping layer, and has good extensibility, softness and ultra-thin property besides the characteristics of normal high flame retardance, halogen free and low smoke.

The shielding layer 6 is coated on the periphery of the first wrapping layer 5, and is preferably a tinned copper wire braided shielding layer, so that the structure can prevent current from leaking along the radial direction, ensure use safety, has good electrical insulation property, heat resistance and certain mechanical strength, and can prevent copper oxidation and corrosion and improve weldability and reliability by using tinned copper.

The second wrapping layer 7 is wrapped around the shielding layer 6, and is preferably a reinforced non-woven fabric, and the structure has the characteristics of moisture resistance, ventilation, flexibility, light weight, flame retardance, no toxicity or smell, low cost, recycling and the like.

The oxygen isolation layer 8 is coated on the periphery of the second coating belt 7, preferably is extrusion fire-proof mud, and the structure is a flexible flame-retardant material, and has the characteristics of good fire resistance, oil resistance, water resistance, corrosion resistance, high fire-proof limit, low smoke generation and the like.

The armor layer 9 is coated on the periphery of the oxygen barrier layer 8, and is preferably a galvanized steel tape armor layer, and the structure has good corrosion resistance.

The outer sheath 10 is coated on the periphery of the armor layer 9, and is preferably a B1-level low-smoke zero-halogen flame-retardant polyolefin injection molding material layer, which is a halogen-free, low-smoke-quantity, high-flame-retardant and thermoplastic polyolefin injection molding material.

The control cable for the high-strength B1-level flame-retardant subway, which is formed by the scheme, has excellent flame-retardant performance besides the flexibility, flame retardance and electrical performance of a common cable by arranging the multi-layer flame-retardant structure, and further improves the reliability of the B1-level cable.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. The high-strength flame-retardant control cable for the subway is characterized by comprising a plurality of cable cores, a first wrapping layer, a shielding layer, a second wrapping layer, an oxygen isolation layer, an armor layer and an outer sheath; the cable cores are arranged in a one-time lamination mode from inside to outside, each cable core is composed of a conductor, a fire-resistant layer and an insulating layer, the conductor is a seven-strand stranded tinned copper wire conductor, the fire-resistant layer is coated on the periphery of the conductor, and the insulating layer is coated on the periphery of the fire-resistant layer; the first belting layer is coated on the periphery of the cable core, the shielding layer is coated on the periphery of the first belting layer, the second belting layer is coated on the periphery of the shielding layer, the oxygen isolation layer is coated on the periphery of the second belting layer, and the armor layer is coated on the periphery of the oxygen isolation layer.

2. The high-strength flame-retardant control cable for subways of claim 1, wherein the fire-resistant layer is a fire-resistant mica tape layer.

3. The high-strength flame-retardant control cable for subways of claim 1, wherein the insulating layer is an irradiation cross-linked low-smoke halogen-free flame-retardant polyolefin insulating layer.

4. The high-strength flame-retardant control cable for subways according to claim 1, wherein a filling layer is arranged among the plurality of cable cores, and the filling layer is a high-temperature flame-retardant filling rope.

5. The high-strength flame-retardant control cable for subways of claim 1, wherein the first belting layer is coated on the periphery of the cable core, and the first belting layer is a low-smoke halogen-free high-flame-retardant belting layer.

6. The high-strength flame-retardant control cable for subways, according to claim 1, characterized in that the shielding layer is coated on the periphery of the first wrapping band layer and is a tinned copper wire braided shielding layer.

7. The high-strength flame-retardant control cable for subways of claim 1, wherein the second tape layer is wrapped around the shielding layer, and the second tape layer is a reinforced non-woven fabric.

8. The high-strength flame-retardant control cable for subways of claim 1, wherein the oxygen-insulating layer is coated on the periphery of the second coating, and the oxygen-insulating layer is an extrusion fireproof mud layer.

9. The high-strength flame-retardant control cable for subways of claim 1, wherein the armor is coated on the periphery of the oxygen barrier, and the armor is a galvanized steel tape armor.

10. The high-strength flame-retardant control cable for subways of claim 1, wherein the outer sheath is coated on the periphery of the armor layer, and the outer sheath is a B1-level low-smoke halogen-free flame-retardant polyolefin injection molding layer.

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