CN215933241U

CN215933241U - Novel B1-grade halogen-free low-smoke flame-retardant fire-resistant power cable

Info

Publication number: CN215933241U
Application number: CN202122156307.9U
Authority: CN
Inventors: 石彦良; 孙国刚
Original assignee: Liaoning Jiayi Cable Co ltd
Current assignee: Liaoning Jiayi Cable Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-03-01
Anticipated expiration: 2031-09-07

Abstract

The utility model discloses a novel B1-grade halogen-free low-smoke flame-retardant fireproof power cable which comprises a cable body, wherein the cable body comprises a power wire core, the outer side of the power wire core is wrapped with a composite insulating layer, the outer side of the composite insulating layer is wrapped with a steel tape armor, the outer side of the steel tape armor is wrapped with a mineral fireproof oxygen-insulating layer, the outer side of the mineral fireproof oxygen-insulating layer is wrapped with an outer protective layer, and the composite insulating layer comprises a mineral insulating layer. According to the utility model, the steel tape armor is arranged, so that the compressive strength of the device can be improved, the phenomenon of stress deformation can be avoided, the mineral insulating layer and the extruded insulating layer can be arranged, the electric wire core can be insulated, the phenomenon of electric leakage can be avoided, the fireproof adhesive layer and the fireproof wrapping tape are arranged, the effect of isolating the attenuation heat degree of oxygen can be fully realized, the temperature of the inner layer is far lower than the melting temperature of the steel tape armor, and the integrity of the steel tape armor is ensured.

Description

Novel B1-grade halogen-free low-smoke flame-retardant fire-resistant power cable

Technical Field

The utility model relates to the technical field of power cables, in particular to a novel B1-grade halogen-free low-smoke flame-retardant fireproof power cable.

Background

The power cable is used for transmitting and distributing electric energy, the power cable is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and transmission lines under the sea water of river crossing, in the power line, the proportion of the cable is gradually increased, the power cable is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and comprises various voltage grades of 1-500KV and above, various insulated power cables, and the design consideration of fire safety of the engineering construction in China, a higher flame-retardant combustion performance grade B1 flame-retardant cable is selected in places with dense personnel and places needing special protection, the flame-retardant combustion performance grade B1 flame-retardant cable has the functions of ensuring more scientific and reasonable fire safety requirements, reducing possible fire hazard, and having important significance on building fire safety by using the flame-retardant combustion performance grade 81 cable, but the flame-retardant capability of the existing flame-retardant power cable is lower, a large amount of harmful smoke is generated during combustion, the pressure resistance strength needs to be improved, and the use requirements of some special places cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel B1-grade halogen-free low-smoke flame-retardant fireproof power cable which has the advantages of flame retardance, high temperature resistance, high compressive strength and long service life, and solves the problems that the conventional fireproof power cable is low in flame retardance, generates a large amount of harmful smoke during combustion, needs to be improved in compressive strength and cannot meet the use requirements of some special places.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel fire-retardant fire-resistant power cable of B1 level zero halogen low smoke, includes the cable body, the cable body includes the electric core, the outside parcel of electric core has composite insulation layer, composite insulation layer's outside parcel has the steel band armor, the outside parcel of steel band armor has the mineral substance fire prevention to separate the oxygen layer, the outside parcel that the oxygen layer was separated in the mineral substance fire prevention has the outer jacket, composite insulation layer includes mineral insulation layer, mineral insulation layer's outside parcel has crowded package insulating layer, the mineral substance fire prevention separates the oxygen layer and includes the fire prevention glue film, the outside parcel of fire prevention glue film has fire-resistant band.

Preferably, the steel tape armor is wound on the outer side of the composite insulating layer, and the steel tape armor is double-layer.

Preferably, the thickness of the steel tape armor is greater than that of the composite insulating layer, and the thickness of the composite insulating layer is 0.3 mm.

Preferably, the cable body is set to be a round solid core, and the diameter of the cable body is 2 mm.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model can improve the pressure resistance strength of the device by arranging the steel tape armor, avoids the phenomenon of stress deformation, can play an insulating role on a wire core by arranging the mineral insulating layer and the extruded insulating layer, avoids the phenomenon of electric leakage, fully plays a role in isolating the attenuation heat degree of oxygen by arranging the fireproof adhesive layer and the fireproof wrapping tape, ensures that the temperature of the inner layer is far lower than the melting temperature of the steel tape armor, ensures the integrity of the steel tape armor, has good halogen-free flame retardant and corrosion resistant characteristics by arranging the outer protective layer, can adapt to various corrosive places, and has no influence on resources such as environment, underground water and the like.

2. According to the utility model, the steel tape armor is arranged to be double-layer, so that gaps existing in single-layer wrapping can be avoided on the premise of ensuring the use strength, a good insulation effect can be achieved by arranging the composite insulating layer, the effects of fire resistance and high temperature resistance can also be achieved, and by determining the shape and the diameter of the cable body, on one hand, the power transmission efficiency is improved, the energy loss is reduced, and on the other hand, the cable is convenient for workers to take.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial cross-sectional view of a composite insulation layer of the present invention;

fig. 3 is a partial cross-sectional view of the mineral fire and oxygen barrier of the present invention.

In the figure: 1. a cable body; 2. a wire core; 3. a composite insulating layer; 4. steel tape armoring; 5. a mineral fireproof oxygen-insulating layer; 6. an outer jacket; 7. a mineral insulation layer; 8. extruding an insulating layer; 9. a fireproof glue layer; 10. fire-resistant belting.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The cable body 1, the wire core 2, the composite insulating layer 3, the steel tape armor 4, the mineral fireproof oxygen-insulating layer 5, the outer protective layer 6, the mineral insulating layer 7, the extruded insulating layer 8, the fireproof adhesive layer 9 and the fireproof wrapping tape 10 are all universal standard parts or parts known by technical personnel in the field, and the structure and the principle of the cable are known by the technical handbook or by a conventional experimental method.

Referring to fig. 1-3, a novel B1-grade halogen-free low-smoke flame-retardant fireproof power cable comprises a cable body 1, wherein the cable body 1 comprises a wire core 2, the outer side of the wire core 2 is wrapped with a composite insulating layer 3, the outer side of the composite insulating layer 3 is wrapped with a steel tape armor 4, the outer side of the steel tape armor 4 is wrapped with a mineral fireproof oxygen-insulating layer 5, the outer side of the mineral fireproof oxygen-insulating layer 5 is wrapped with an outer protective layer 6, the composite insulating layer 3 comprises a mineral insulating layer 7, the outer side of the mineral insulating layer 7 is wrapped with a wrapping insulating layer 8, the mineral fireproof oxygen-insulating layer 5 comprises a fireproof glue layer 9, the outer side of the fireproof glue layer 9 is wrapped with a fireproof tape 10, the steel tape armor 4 is wound on the outer side of the composite insulating layer 3, the steel tape armor 4 is double-layer, and on the premise of ensuring the use strength, gaps of the single-layer can be avoided, the thickness of the steel tape armor 4 is larger than that of the composite insulating layer 3, the thickness of the composite insulating layer 3 is 0.3mm, good insulating effect can be achieved by arranging the composite insulating layer 3, the effects of fire resistance and high temperature resistance can be achieved, the cable body 1 is arranged to be a round solid core, the diameter of the cable body 1 is 2mm, the shape and the diameter of the cable body 1 are determined, on one hand, the power transmission efficiency is improved, the energy loss is reduced, on the other hand, the taking of workers is facilitated, the pressure resistance strength of the device can be improved by arranging the steel tape armor 4, the phenomenon of stress deformation is avoided, the wire core 2 can be insulated by arranging the mineral insulating layer 7 and the extruded insulating layer 8, the phenomenon of electric leakage is avoided, the effect of insulating oxygen attenuation heat degree is fully achieved by arranging the fireproof glue layer 9 and the fireproof wrapping tape 10, the temperature of the inner layer is far lower than the melting temperature of the steel tape armor 4, the integrity of the steel tape armor 4 is ensured, and the outer protective layer 6 has good halogen-free flame retardant and anti-corrosion characteristics, can adapt to various corrosive places, and has no influence on resources such as environment, underground water and the like.

When the device is used, the wire core 2 is made of an annealed copper conductor, the steel strip armor 4 is a double-layer galvanized steel strip gap lapping, the gap of the inner layer steel strip is not more than 50% of the width of the steel strip, the gap of the inner layer steel strip is covered by the outer layer steel strip, the pressure resistance strength of the device can be improved by arranging the steel strip armor 4, the phenomenon of stress deformation is avoided, the outer protective layer 6 is made of low-smoke halogen-free polyolefin, the outer protective layer 6 has good halogen-free flame retardant and corrosion-resistant characteristics, the device can adapt to various corrosive places and simultaneously has no influence on resources such as environment and underground water, the mineral insulating layer 7 is made of non-calcined gold mica tape, the extruded insulating layer 8 is made of crosslinked polyethylene insulation extrusion, and the mineral insulating layer 7 and the extruded insulating layer 8 are arranged to play an insulating role on the wire core 2, avoid appearing the phenomenon of electric leakage, not only can play good insulating effect, can also reach the effect of fire-resistant high temperature resistance, the use material of fire prevention glue film 9 is the gelatinous thing that magnesium oxide powder and building emulsion mix and form, through setting up fire prevention glue film 9 and fire-resistant band 10, fully play the effect of isolated oxygen decay heat degree, make the inlayer temperature far be less than the melting temperature of steel band armor 4, the integrality of steel band armor 4 has been guaranteed, cooperation through the above-mentioned structure, can make the device reach fire-retardant high temperature resistant, compressive strength is high, long service life's advantage, and is suitable for being generalized to use.

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

Claims

1. The utility model provides a novel fire-retardant fire-resistant power cable of fire-retardant low cigarette of no halogen of B1 level, includes cable body (1), its characterized in that: cable body (1) includes electric core (2), the outside parcel of electric core (2) has composite insulation layer (3), the outside parcel of composite insulation layer (3) has steel band armor (4), the outside parcel of steel band armor (4) has the mineral substance fire prevention to separate oxygen layer (5), the outside parcel that the mineral substance fire prevention separated oxygen layer (5) has outer jacket (6), composite insulation layer (3) include mineral insulation layer (7), the outside parcel of mineral insulation layer (7) has crowded package insulating layer (8), the mineral substance fire prevention separates oxygen layer (5) and includes fire prevention glue film (9), the outside parcel of fire prevention glue film (9) has fire-resistant band (10).

2. The novel B1-grade halogen-free low-smoke flame-retardant fire-resistant power cable according to claim 1, characterized in that: the steel tape armor (4) is wound on the outer side of the composite insulating layer (3), and the steel tape armor (4) is double-layer.

3. The novel B1-grade halogen-free low-smoke flame-retardant fire-resistant power cable according to claim 1, characterized in that: the thickness of the steel tape armor (4) is larger than that of the composite insulating layer (3), and the thickness of the composite insulating layer (3) is 0.3 mm.

4. The novel B1-grade halogen-free low-smoke flame-retardant fire-resistant power cable according to claim 1, characterized in that: the cable body (1) is set to be a round solid core, and the diameter of the cable body (1) is 2 mm.