CN211957244U

CN211957244U - Plastic insulation power cable

Info

Publication number: CN211957244U
Application number: CN202020786926.9U
Authority: CN
Inventors: 曹兴; 曹永学
Original assignee: Sichuan Xinchao Cable Co ltd
Current assignee: Sichuan Xinchao Cable Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-11-17
Anticipated expiration: 2030-05-13

Abstract

The utility model discloses an insulating power cable of plastics, including external insulation subassembly, internal insulation subassembly and conduction subassembly, the conduction subassembly includes a plurality of copper conductors, and the outside of copper conductor is provided with first bag layer, and the outside of first bag layer is provided with the PVC insulating layer, and the PVC insulating layer outside is provided with the shielding layer, and the shielding layer outside is provided with the inner sheath layer, and the internal insulation subassembly is including insulating cross support, and cross end department of cross support all contacts with the inner sheath layer, and the outside of conduction subassembly is provided with second bag layer and first insulation stopping. This cable all can adapt to in the chilly environment of humidity, is difficult to contact between each conduction subassembly of inside, is difficult to lead to the electric leakage, with crossing two-layer insulating filler material, can alleviate the quality of cable again in effectual insulation, sets up anti wire drawing in filler material, and convenient application when changing the cable underground, armor can effectual protection cable, makes it be difficult to destroyed.

Description

Plastic insulation power cable

Technical Field

The utility model relates to the technical field of cables, in particular to plastic insulation power cable.

Background

With the development of society, cables are one of indispensable consumptive materials in the power transmission process, and the quality requirements of various industries on the cables are higher and higher. In cities, most cables are buried underground, the cables need to be insulated, the underground is often in a humid environment, particularly in winter, the cables are in a cold environment, the cable jacket is easily damaged in the long term, then the inner protective layer is damaged, and power transmission lines are contacted with each other to cause the electric leakage of the cables, so that the cables cannot normally supply power when having problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide an insulating power cable of plastics.

The purpose of the utility model is realized through the following technical scheme:

a plastic insulation power cable comprises an outer insulation assembly, wherein an inner insulation assembly is arranged inside the outer insulation assembly, and four groups of conduction assemblies are arranged in the inner insulation assembly;

the conductive assembly comprises a plurality of copper conductors, a first bag layer is arranged on the outer side of each copper conductor, a PVC insulating layer is arranged on the outer side of each first bag layer, a shielding layer is arranged on the outer side of each PVC insulating layer, and an inner sheath layer is arranged on the outer side of each shielding layer;

the inner insulation assembly comprises an insulated cross support, cross ends of the cross support are in contact with the inner sheath layer, second bag layers are arranged on the outer sides of the four groups of conduction assemblies, and first insulation filling materials are filled in the gaps among the second bag layers, the inner sheath layer and the cross support;

and a second insulating filling material is filled between the outer insulating assembly and the second bag layer, and a plurality of anti-wiredrawing wires are arranged in the second insulating filling material.

Further, the outer insulation assembly comprises a fire-resistant insulation layer in contact with the second insulation filler, an armor layer is arranged on the outer side of the fire-resistant insulation layer, and an outer sheath layer is arranged on the outer side of the armor layer.

Further, the outer sheath layer and the inner sheath layer both use silicon rubber materials.

Further, the first bag layer and the second bag layer are both mica tape-wound bags.

Further, seven copper conductors are arranged in the conducting assembly, one copper conductor is surrounded by the other six copper conductors, and two adjacent copper conductors are in contact with each other.

Further, the cross bracket is made of epoxidized natural rubber.

Further, the material of the first insulating filler is alkali-free glass fiber.

Further, the second insulating filling material is made of ethylene propylene diene monomer rubber with low density.

The utility model has the advantages that:

this cable all can adapt to in the chilly environment of humidity, is difficult to contact between each conduction subassembly of inside, is difficult to lead to the electric leakage, with crossing two-layer insulating filler material, can alleviate the quality of cable again in effectual insulation, sets up anti wire drawing in filler material, and convenient application when changing the cable underground, armor can effectual protection cable, makes it be difficult to destroyed.

Drawings

FIG. 1 is a schematic view of the present cable construction;

in the figure, 1-copper conductor, 2-first bag layer, 3-PVC insulating layer, 4-shielding layer, 5-inner sheath layer, 6-cross bracket, 7-second bag layer, 8-first insulating filler, 9-second insulating filler, 10-anti-wiredrawing layer, 11-fire-resistant insulating layer, 12-armor layer and 13-outer sheath layer.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a technical scheme:

a plastic insulation power cable comprises an outer insulation assembly, wherein an inner insulation assembly is arranged inside the outer insulation assembly, and four groups of conduction assemblies are arranged in the inner insulation assembly. The conduction subassembly includes a plurality of copper conductor 1, and the outside of copper conductor 1 is provided with first bag layer 2, and the outside of first bag layer 2 is provided with PVC insulating layer 3, and the 3 outsides of PVC insulating layer are provided with shielding layer 4, and the 4 outsides of shielding layer are provided with inner sheath layer 5. The internal insulation subassembly includes insulating cross support 6, and the cross end department of cross support 6 all contacts with inner sheath layer 5, and four groups conduction assemblies's the outside is provided with second bag layer 7, and second bag layer 7,

inner sheath layer

5 and 6 besieged city clearance departments of cross support are filled with first insulation stopping 8. A second insulating filling material 9 is filled between the outer insulating assembly and the second bag-wrapping layer 7, and a plurality of anti-drawing wires 10 are arranged in the second insulating filling material 9.

In some embodiments, the outer insulation assembly comprises a layer of refractory insulation 11 in contact with the second insulation filler 9, an armor layer 12 disposed on an outer side of the layer of refractory insulation 11, and an outer jacket layer 13 disposed on an outer side of the armor layer 12. The armor layer 12 is armored by stainless steel belts, and can play a certain bearing capacity. The fire-resistant insulating layer 11 is formed by winding a high-fire-resistant ceramic fire-resistant composite tape.

In some embodiments, silicone rubber material is used for both the outer sheath layer 13 and the inner sheath layer 5. The silicon rubber material adopts the prior art material and comprises the following raw materials in parts by weight: 96-99 parts of silicone rubber, 0.4-0.6 part of vulcanizing agent, 0.2-0.4 part of crosslinking agent, 0.1-0.2 part of anti-scorching agent, 0.1-0.2 part of accelerator, 0.1-0.2 part of antioxidant, 0.1-0.2 part of anti-aging agent, 0.1-0.2 part of plasticizer, 0.1-0.2 part of stabilizer, 0.1-0.2 part of ultraviolet absorber and 0.1-0.2 part of lubricant.

In some embodiments, both the first and

second sachet layers

2, 7 are mica tape wrapped. Seven copper conductors 1 are arranged in the conducting assembly, one copper conductor 1 is surrounded by the other six copper conductors 1, and two adjacent copper conductors 1 are in contact with each other. Seven adjacent two of copper conductor 1 contact each other, can effectually reduce resistance, make things convenient for first bag layer 2 to wind the package simultaneously, and the clearance of leaving is little for the cable is compacter.

In some embodiments, the material of the spider 6 is epoxidized natural rubber. The epoxidized natural rubber has good wet skid resistance, excellent air tightness, good oil resistance and the like, so that the epoxidized natural rubber is not easy to damage and is easier to prevent a conducting component from contacting to cause short circuit.

In some embodiments, the material of the first insulating filler 8 is alkali-free glass fiber. The alkali-free glass fiber has the advantages of high tensile strength, small elongation, high elastic coefficient, good rigidity, inorganic fiber, incombustibility, good chemical resistance, small water absorption, low price and the like, so the alkali-free glass fiber is suitable for being used as the first insulating filler 8. The second insulating filling material 9 is made of ethylene propylene diene monomer rubber with low density, the ethylene propylene diene monomer rubber is good in elasticity, low in density and easy to process, and therefore the anti-drawing wires 10 need to be placed in the ethylene propylene diene monomer rubber, and meanwhile the anti-drawing wires 10 are stainless steel wires.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A plastic insulated power cable, characterized in that: the device comprises an outer insulation assembly, wherein an inner insulation assembly is arranged in the outer insulation assembly, and four groups of conduction assemblies are arranged in the inner insulation assembly;

the conductive assembly comprises a plurality of copper conductors (1), a first bag layer (2) is arranged on the outer side of each copper conductor (1), a PVC insulating layer (3) is arranged on the outer side of each first bag layer (2), a shielding layer (4) is arranged on the outer side of each PVC insulating layer (3), and an inner sheath layer (5) is arranged on the outer side of each shielding layer (4);

the inner insulation assembly comprises an insulated cross support (6), cross ends of the cross support (6) are in contact with the inner sheath layer (5), second bag layers (7) are arranged on the outer sides of the four groups of conduction assemblies, and first insulation filling materials (8) are filled in the gaps formed by the second bag layers (7), the inner sheath layer (5) and the cross support (6);

and a second insulating filling material (9) is filled between the outer insulating assembly and the second bag-wrapping layer (7), and a plurality of anti-drawing wires (10) are arranged in the second insulating filling material (9).

2. A plastic insulated power cable according to claim 1, characterized in that: the outer insulation assembly comprises a fire-resistant insulation layer (11) in contact with the second insulation filler (9), an armor layer (12) is arranged on the outer side of the fire-resistant insulation layer (11), and an outer sheath layer (13) is arranged on the outer side of the armor layer (12).

3. A plastic insulated power cable according to claim 2, characterized in that: the outer sheath layer (13) and the inner sheath layer (5) both use silicon rubber materials.

4. A plastic insulated power cable according to claim 1, characterized in that: the first bag layer (2) and the second bag layer (7) are both mica tape-wound coatings.

5. A plastic insulated power cable according to claim 1, characterized in that: seven copper conductors (1) are arranged in the conduction assembly, one copper conductor (1) is surrounded by the other six copper conductors (1), and two adjacent copper conductors (1) are mutually contacted.

6. A plastic insulated power cable according to claim 1, characterized in that: the cross-shaped bracket (6) is made of epoxidized natural rubber.

7. A plastic insulated power cable according to claim 1, characterized in that: the first insulating filling material (8) is made of alkali-free glass fiber.

8. A plastic insulated power cable according to claim 1, characterized in that: the second insulating filling material (9) is made of ethylene propylene diene monomer rubber with low density.