CN218447289U

CN218447289U - Power cable with crosslinked polyolefin sheath insulation

Info

Publication number: CN218447289U
Application number: CN202222678481.4U
Authority: CN
Inventors: 茆成彦; 周寿清; 孙圣杰; 张磊; 姚平; 周林宁; 曹国良
Original assignee: JIANGSU RUNHUA CABLE SHAREHOLDING CO Ltd
Current assignee: JIANGSU RUNHUA CABLE SHAREHOLDING CO Ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-02-03
Anticipated expiration: 2032-10-12

Abstract

The utility model relates to a power cable technical field especially relates to a possess insulating power cable of crosslinked polyolefin sheath. The cable comprises a cable core, wherein the cable core consists of a conductor, a non-woven fabric layer, a cross-linked polyolefin inner sheath and a shielding layer, a wrapping tape is coated outside the cable core, flame-retardant insulating filler is filled inside the wrapping tape, a fireproof layer is arranged outside the shielding layer, a ceramic silicon rubber layer is arranged outside the fireproof layer, a water blocking tape is arranged between the ceramic silicon rubber layer and the fireproof layer, the water blocking tape is S-shaped, a reinforcing core is arranged in a concave position of the water blocking tape, and a cross-linked polyolefin outer sheath is arranged outside the ceramic silicon rubber layer. The utility model discloses have better tensile resistance, improved waterproof, fire prevention, the insulating fire-retardant characteristic of cable simultaneously, improved the life of cable, convenient to use.

Description

Power cable with crosslinked polyolefin sheath insulation

Technical Field

The utility model relates to a power cable technical field especially relates to a possess insulating power cable of crosslinked polyolefin sheath.

Background

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 is commonly used for urban underground power grids, power station leading-out lines, power supply in industrial and mining enterprises and power transmission lines under river-crossing seawater. When the existing power cable is laid for use, the problem of insufficient stretch resistance exists mostly, the existing power cable is easy to damage by being pulled by the outside, and the service life is shortened. To this end, we propose a power cable with crosslinked polyolefin sheath insulation to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a stretch-proofing nature is good, has better waterproof, fire prevention, insulating fire-retardant characteristic, and convenient to use possess the insulating power cable of crosslinked polyolefin sheath.

The utility model discloses a solve above-mentioned problem, the technical scheme who proposes is: the power cable with the cross-linked polyolefin sheath insulation comprises a wire core, wherein the wire core consists of a conductor, a non-woven fabric layer, a cross-linked polyolefin inner sheath and a shielding layer, a wrapping tape is wrapped outside the wire core, flame-retardant insulating filler is filled inside the wrapping tape, a fireproof layer is arranged outside the shielding layer, a ceramic silicon rubber layer is arranged outside the fireproof layer, a water blocking tape is arranged between the ceramic silicon rubber layer and the fireproof layer, the water blocking tape is S-shaped, a reinforcing core is arranged in a concave position of the water blocking tape, and the cross-linked polyolefin outer sheath is arranged outside the ceramic silicon rubber layer.

Furthermore, the sinle silk is equipped with three groups, three groups be equipped with nonmetal enhancement core between the sinle silk.

Further, the non-woven fabric layer is wrapped outside the conductor, the cross-linked polyolefin inner sheath is wrapped outside the non-woven fabric layer, and the shielding layer is wrapped outside the cross-linked polyolefin inner sheath.

Furthermore, the shielding layer is woven by a reticular metal wire.

Furthermore, the fireproof layer is filled with inorganic fireproof blocking materials.

Further, the reinforcing core is an aramid silica gel core.

The utility model has the advantages that:

the utility model discloses effectively increased the tensile strength of cable, improved waterproof, the fire behavior of cable, can effectively shield the electromagnetic field, improved the security, still have better fire-retardant insulating nature, effectively improved the service characteristic of cable, improved the life of cable.

Drawings

Fig. 1 is a schematic structural diagram of a power cable having a crosslinked polyolefin sheath insulation according to the present invention.

Fig. 2 is a schematic structural diagram of a core of a power cable having a sheath insulation of crosslinked polyolefin.

( 1. A wire core; 2. a conductor; 3. a non-woven fabric layer; 4. a cross-linked polyolefin inner jacket; 5. a shielding layer; 6. wrapping a tape; 7. flame-retardant insulating filler; 8. a fire barrier layer; 9. a silicon rubber ceramic layer; 10. a water blocking tape; 11. a reinforcing core; 12. a cross-linked polyolefin outer jacket; 13. non-metal reinforced core )

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model provides a pair of have insulating power cable of crosslinked polyolefin sheath, including sinle silk 1, sinle silk 1 comprises conductor 2, non-woven fabrics layer 3, crosslinked polyolefin inner sheath 4 and shielding layer 5, the outside cladding of sinle silk 1 has around band 6, it has fire-retardant insulating filler 7 to fill around the inside of band 6, the outside of shielding layer 5 is equipped with flame retardant coating 8, the outside of flame retardant coating 8 is equipped with pottery silastic layer 9, be equipped with water blocking tape 10 between pottery silastic layer 9 and the flame retardant coating 8, water blocking tape 10 sets to the S-shaped, water blocking tape 10 'S cove is equipped with and strengthens core oversheath 11, pottery silastic layer 9' S outside is equipped with crosslinked polyolefin 12.

The utility model discloses when using, can prevent the infiltration of external material through non-woven fabrics layer 3, cross-linked polyolefin inner sheath 4 makes the cable have better heat resistance and insulating nature, shielding layer 5 shields the electromagnetic field, improve the security, wrap up sinle silk 1 around band 6 in inside, make their inseparable round winding together, it is loose to prevent, fire-retardant insulating filler 7 plays fire-retardant insulating action, improve the fire-retardant insulating properties of cable, the fire behavior of 8 reinforcing cables on flame retardant coating, pottery silastic-rubber layer 9 improves the fire-resistant property of cable, water-blocking tape 10 improves the waterproof property of cable, water-blocking tape 10 forms the group water section after the water-encountering expansion, prevent the further infiltration of water, strengthen core 11 and improve the tensile strength of cable, cross-linked polyolefin oversheath 12 further improves the insulating nature of cable, the heat resistance, make the cable have better environmental resistance performance, the life of improvement cable.

The sinle silk 1 is equipped with three groups, three groups be equipped with nonmetal enhancement core 13 between the sinle silk 1.

Furthermore, the tensile resistance of the cable can be further enhanced through the non-metal reinforced core 13, and the service life of the cable is prolonged.

The non-woven fabric layer 3 is wrapped outside the conductor 2, the cross-linked polyolefin inner sheath 4 is wrapped outside the non-woven fabric layer 3, and the shielding layer 5 is wrapped outside the cross-linked polyolefin inner sheath 4.

Furthermore, the layer is wrapped layer by layer, so that the protection of the conductor 2 is enhanced, and the service characteristics of the cable are improved.

The shielding layer 5 is woven by a reticular metal wire.

Furthermore, the shielding layer is woven by metal wires, if the cable is damaged in the using process and generates an electric leakage phenomenon, the shielding layer can lead the leaked current to the grounding wire, and a certain safety protection effect is achieved. Meanwhile, the cable also has the function of protecting the cable conductor.

And the fireproof layer 8 is filled with inorganic fireproof blocking materials.

Furthermore, the inorganic fireproof blocking material belongs to a non-combustible material, basically does not change the volume under the action of high temperature and flame to form a hard and compact protective layer, has low thermal conductivity, has obvious fireproof and heat-insulating effects, and improves the fireproof characteristic of the cable.

The reinforced core 11 is made of aramid fiber and silica gel.

Furthermore, the aramid fiber silica gel core enhances the tensile resistance of the cable and improves the service performance of the cable.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A power cable having cross-linked polyolefin jacket insulation, characterized by: the cable comprises a cable core (1), wherein the cable core (1) comprises a conductor (2), a non-woven fabric layer (3), a cross-linked polyolefin inner sheath (4) and a shielding layer (5), the outside of the cable core (1) is coated with a wrapping tape (6), the inside of the wrapping tape (6) is filled with a flame-retardant insulating filler (7), the outside of the shielding layer (5) is provided with a fireproof layer (8), the outside of the fireproof layer (8) is provided with a ceramic silicon rubber layer (9), a water blocking tape (10) is arranged between the ceramic silicon rubber layer (9) and the fireproof layer (8), the water blocking tape (10) is arranged in an S shape, a reinforcing core (11) is arranged in a concave position of the water blocking tape (10), and the outside of the ceramic silicon rubber layer (9) is provided with a cross-linked polyolefin outer sheath (12).

2. An electric power cable having a crosslinked polyolefin sheath insulation according to claim 1, characterized in that: the wire cores (1) are provided with three groups, and a nonmetal reinforcing core (13) is arranged between the wire cores (1) of the three groups.

3. An electric power cable provided with a crosslinked polyolefin sheath insulation according to claim 1, characterized in that: the non-woven fabric layer (3) wraps the outer portion of the conductor (2), the cross-linked polyolefin inner sheath (4) wraps the outer portion of the non-woven fabric layer (3), and the shielding layer (5) wraps the outer portion of the cross-linked polyolefin inner sheath (4).

4. An electric power cable provided with a crosslinked polyolefin sheath insulation according to claim 1, characterized in that: the shielding layer (5) is woven by a reticular metal wire.

5. An electric power cable having a crosslinked polyolefin sheath insulation according to claim 1, characterized in that: and the fireproof layer (8) is filled with inorganic fireproof blocking materials.

6. An electric power cable having a crosslinked polyolefin sheath insulation according to claim 1, characterized in that: the reinforced core (11) is made of aramid fiber silica gel.