CN218447315U - Environment-friendly medium-voltage power cable - Google Patents

Abstract

The utility model discloses an environmental protection middling pressure power cable, its technical scheme main points are: the fireproof cable comprises a plurality of cable cores, the cable cores sequentially comprise cable core conductors, fire-resistant mica tapes and insulating layers from inside to outside, the insulating layers are made of cross-linked polyethylene materials in an extruding mode, inner fireproof layers are arranged on the outer sides of the cable cores and made of ceramic silicon rubber materials, wrapping tape layers are wound on the outer sides of the inner fireproof layers, fillers are filled in gaps between the wrapping tape layers and the inner fireproof layers, shielding layers are arranged on the outer sides of the wrapping tape layers, outer fireproof layers are arranged on the outer sides of the shielding layers and made of basalt fiber fireproof cloth, armor layers are arranged on the outer sides of the outer fireproof layers, sheath layers are arranged on the outer sides of the armor layers and made of halogen-free flame-retardant thermoplastic polyurethane materials, and fireproof coatings are coated on the outer sides of the sheath layers; the utility model discloses, have higher fire proofness, fire resistance and low release, accord with the environmental protection requirement more.

Description

Environment-friendly medium-voltage power cable

Technical Field

The utility model belongs to the technical field of the power cable technique and specifically relates to an environmental protection middling pressure power cable.

Background

The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply in industrial and mining enterprises and transmission lines under river-crossing seawater, has a gradually increased proportion in the power line, is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and comprises various insulated power cables with voltage grades of 1-500KV and above.

Most of the existing power cables are poor in fire prevention and flame retardance, the combustible substances generated after the cables reach ignition points and the combustible gas released from the cables can play a role in supporting combustion in fire safety, the combustible gas released from the cables can accelerate the combustion of the cables, and drops, particles and smoke toxicity and corrosivity in the combustible substances are greatly harmful.

SUMMERY OF THE UTILITY MODEL

To the problem mentioned in the background art, the utility model aims at providing an environmental protection middling pressure power cable has higher fire proofness, fire resistance and low release, accords with the environmental protection requirement more.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an environmental protection middling pressure power cable, includes many cable cores, many the cable cores transposition each other, the cable core includes cable core conductor, fire resistant mica tape and insulating layer from inside to outside in proper order, the insulating layer adopts cross-linked polyethylene material crowded package to make, the outside of cable core is provided with interior flame retardant coating, interior flame retardant coating adopts ceramic silicon rubber material to make, and is a plurality of the outside winding of interior flame retardant coating is provided with around the band layer, around the band layer with the gap department packing between the interior flame retardant coating is provided with the filler, the outside of around the band layer is provided with the shielding layer, the outside of shielding layer is provided with outer flame retardant coating, outer flame retardant coating is basalt fiber fire prevention cloth, the outside of outer flame retardant coating is provided with the armor, the outside of armor is provided with the restrictive coating, the restrictive coating adopts halogen-free flame retardant polyurethane material to make, the outside fire prevention coating of restrictive coating.

Furthermore, the cable core conductor is formed by twisting a plurality of strands of tinned copper wires and tinned nickel wires in a composite manner.

By adopting the technical scheme, the cable core can be ensured to have good conductivity.

Furthermore, the wrapping tape layer is made of glass fiber tapes.

By adopting the technical scheme, the glass fiber belt has the characteristics of high temperature resistance, heat preservation and insulation, fire prevention, flame retardance, corrosion resistance, aging resistance, weather resistance, high strength, smooth appearance and the like.

Further, the filler is inorganic mineral paper ropes.

Through adopting above-mentioned technical scheme, fill the thing and can ensure that the cable has better roundness for inorganic mineral paper rope, improve the fire-retardant rank of cable and increase the tensile strength of cable.

Furthermore, the shielding layer is formed by mixing and weaving tinned copper wires and an aluminum foil composite tape, and the weaving coverage rate of the shielding layer is not less than 85%.

By adopting the technical scheme, the cable has good capability of shielding external electromagnetic signal interference.

Furthermore, the armor layer is formed by weaving galvanized steel wires, and the armor layer is provided with two layers.

Through adopting above-mentioned technical scheme, tensile mechanical properties and the corrosion resistance of cable can be strengthened.

To sum up, the utility model discloses mainly have following beneficial effect:

1. according to the utility model, the inner fireproof layer is arranged at the outer end of the cable core and is made of ceramic silicon rubber materials, the ceramic silicon rubber has excellent characteristics of fire prevention, flame retardance, low smoke, no toxicity and the like, residues after combustion are hard ceramic shells, and hard shells are not melted and do not drip in a fire environment; meanwhile, the outer fireproof layer is arranged in the cable, is made of basalt fiber fireproof cloth, not only has excellent low-temperature resistance and high-temperature resistance (1100 ℃), but also has the advantages of low volume weight, low heat conduction, thermal shock resistance, chemical corrosion resistance, high elastic modulus, good flexibility, wear resistance, folding resistance and the like, and is easy to use, and the fireproof and flame-retardant cable material is a good fireproof and flame-retardant material.

2. The utility model discloses a, the insulating layer adopts the crowded package of crosslinked polyethylene material to make, the crosslinked polyethylene material can be used for a long time under 90 ℃, heat-resisting temperature during the short circuit can reach 250 ℃ the most, crosslinked polyethylene in case take place that cable burning produces is carbon dioxide and water, it has no steamed low cigarette characteristic to possess, the restrictive coating adopts the fire-retardant thermoplastic polyurethane material of halogen-free to make, thermoplastic polyurethane not only possess excellent high tension, tough and ageing-resistant characteristic, but also be the mature environmental protection material of kind, even the cable takes place to burn, can not produce toxic gas yet.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a cable core; 101. a cable core conductor; 102. fire-resistant mica tapes; 103. an insulating layer; 2. an inner fire barrier layer; 3. wrapping a belt layer; 4. a filler; 5. a shielding layer; 6. an outer fire barrier layer; 7. an armor layer; 8. a sheath layer; 9. a fire-retardant coating.

Detailed Description

In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and "sixth" 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," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, an environment-friendly medium-voltage power cable comprises a plurality of cable cores 1, the plurality of cable cores 1 are twisted with each other, the cable cores 1 sequentially include a cable core conductor 101 from inside to outside, a fire-resistant mica tape 102 and an insulating layer 103, the insulating layer 103 is made of a cross-linked polyethylene material in an extrusion manner, an inner fireproof layer 2 is arranged on the outer side of each cable core 1, the inner fireproof layer 2 is made of a ceramic silicon rubber material, a wrapping tape layer 3 is wound on the outer side of the plurality of inner fireproof layers 2, a filler 4 is filled in a gap between the wrapping tape layer 3 and the inner fireproof layer 2, a shielding layer 5 is arranged on the outer side of the wrapping tape layer 3, an outer fireproof layer 6 is arranged on the outer side of the shielding layer 5, the outer fireproof layer 6 is made of a rock fiber fireproof cloth, an armor layer 7 is arranged on the outer side of the outer fireproof layer 6, a sheath layer 8 is arranged on the outer side of the armor layer 7, the sheath layer 8 is made of a halogen-free flame-retardant thermoplastic polyurethane material, the outer side of the sheath layer 8 is coated with a fireproof coating 9, the fireproof coating 9 is made of a tertiary acrylic emulsion water-based material, and can uniformly generate a fireproof coating layer when the fireproof coating 9 is heated, and can effectively inhibit flame from spreading, and can effectively inhibit the spreading of a foam, and can effectively prevent the spreading of the flame from spreading, and can effectively spread.

Referring to fig. 1, the cable core conductor 101 is formed by twisting a plurality of strands of tin-plated copper wires and tin-plated nickel wires in a composite bundle.

Referring to fig. 1, the wrapping tape layer 3 is made of a glass fiber tape.

Referring to fig. 1, the filler 4 is an inorganic mineral paper rope.

Referring to fig. 1, the shielding layer 5 is formed by weaving a composite tape of tinned copper wire and aluminum foil in a mixed manner, and the weaving coverage rate of the shielding layer 5 is not less than 85%.

Referring to fig. 1, the armor layer 7 is formed by weaving galvanized steel wires, and the armor layer 7 is provided with two layers.

When the utility model is used, the inner fireproof layer 2 is made of ceramic silicon rubber material, the ceramic silicon rubber has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, the residue after burning is a hard ceramic shell, and the hard shell is not melted and does not drip in the fire environment; the outer fireproof layer 6 is basalt fiber fireproof cloth, not only has excellent low temperature resistance and high temperature resistance (1100 ℃), but also has the advantages of low volume weight, low heat conduction, thermal shock resistance, chemical corrosion resistance, high elastic modulus, good flexibility, wear resistance, folding resistance and the like, and is easy to use, thereby being a good fireproof and flame-retardant material; the insulating layer 103 is made of a cross-linked polyethylene material through extrusion, the cross-linked polyethylene material can be used at 90 ℃ for a long time, the heat-resistant temperature during short circuit can reach 250 ℃ at most, the cross-linked polyethylene generates carbon dioxide and water once the cable burns, and has the characteristics of no halogen and low smoke, the sheath layer 8 is made of a halogen-free flame-retardant thermoplastic polyurethane material, and the thermoplastic polyurethane has the excellent characteristics of high tension, high tensile force, toughness and aging resistance, is a mature environment-friendly material, and cannot generate toxic gas even if the cable burns; the fireproof coating 9 can generate a uniform and compact spongy foam heat-insulating layer when being on fire, can effectively inhibit and obstruct the propagation and spread of flame, and has a protective effect on cables.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides an environmental protection middling pressure power cable, includes many cable cores (1), its characterized in that: many cable core (1) transposition each other, cable core (1) includes cable core conductor (101), fire resistant mica tape (102) and insulating layer (103) from inside to outside in proper order, insulating layer (103) adopt the crowded package of crosslinked polyethylene material to make, the outside of cable core (1) is provided with interior flame retardant coating (2), interior flame retardant coating (2) adopt ceramic silicon rubber material to make, and is a plurality of the outside winding of interior flame retardant coating (2) is provided with around band layer (3), around band layer (3) with the gap department packing between interior flame retardant coating (2) is provided with filler (4), the outside around band layer (3) is provided with shielding layer (5), the outside of shielding layer (5) is provided with outer flame retardant coating (6), outer flame retardant coating (6) are basalt fiber fire prevention cloth, the outside of outer flame retardant coating (6) is provided with armor (7), the outside of armor (7) is provided with restrictive coating (8), restrictive coating (8) adopt halogen-free flame retardant coating material to make, the outside of thermoplastic polyurethane coating (8) has fireproof coating (9) outside.

2. An environmentally friendly medium voltage power cable according to claim 1, characterized in that: the cable core conductor (101) is formed by twisting a plurality of strands of tinned copper wires and tinned nickel wires in a composite manner.

3. An environmentally friendly medium voltage power cable according to claim 1, characterized in that: the wrapping band layer (3) is made of glass fiber bands.

4. An environmentally friendly medium voltage power cable according to claim 1, characterized in that: the filler (4) is an inorganic mineral paper rope.

5. An environmentally friendly medium voltage power cable according to claim 1, characterized in that: the shielding layer (5) is formed by mixing and weaving tinned copper wires and aluminum foil composite tapes, and the weaving coverage rate of the shielding layer (5) is not less than 85%.

6. An environmentally friendly medium voltage power cable according to claim 1, characterized in that: the armor layer (7) is formed by weaving galvanized steel wires, and the armor layer (7) is provided with two layers.

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