CN209747225U

CN209747225U - Rated voltage crosslinked polyethylene insulated power cable

Info

Publication number: CN209747225U
Application number: CN201920661409.6U
Authority: CN
Inventors: 张建秀
Original assignee: Jiangsu Guanghui Cable Co Ltd
Current assignee: Jiangsu Guanghui Cable Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2019-12-06
Anticipated expiration: 2029-05-09

Abstract

The utility model discloses a rated voltage crosslinked polyethylene insulated power cable, including the sinle silk body, the sinle silk body outside is equipped with the inner cushion layer, the inner cushion layer outside has twined and has wrapped up around the band layer, first crosslinked polyethylene layer has cup jointed around the band layer outside, be equipped with the armor around between band layer and the first crosslinked polyethylene layer, the sinle silk body is including copper core and conductor shielding layer, the conductor shielding layer outside is equipped with the semi-conductive water blocking layer. Compared with the traditional polyethylene protective layer, the mechanical property, the environmental stress cracking resistance, the chemical corrosion resistance, the creep resistance, the electrical property and other comprehensive properties of the polyethylene protective layer are obviously improved; the first groove in the first crosslinked polyethylene layer outside and the second groove in the second crosslinked polyethylene layer outside for the cable is whole to be buckled more easily, has less radius when laying the cable in bent angle department, can reduce the use of bent angle department cable.

Description

Rated voltage crosslinked polyethylene insulated power cable

Technical Field

The utility model relates to a power cable technical field specifically is a rated voltage crosslinked polyethylene insulated power cable.

Background

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 river-crossing seawater. The power cable can be divided into various cables such as fire-resistant and fireproof cables, flame-retardant cables and the like according to different types.

Insulating type cable shell commonly used is mostly the polyethylene protective layer, the polyethylene protective layer is compared in crosslinked polyethylene protective layer in environmental stress cracking resistance ability, chemical resistance corrosion performance, creep resistance and electrical property are relatively poor, and present power cable bending property is relatively poor, need great radius in the bending region when laying the cable, make cable laying need longer distance, cause the waste of resource, so it is necessary to provide a rated voltage crosslinked polyethylene insulated power cable to solve the problem that the aforesaid appears.

SUMMERY OF THE UTILITY MODEL

an object of the utility model is to provide a rated voltage crosslinked polyethylene insulated power cable to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a rated voltage crosslinked polyethylene insulated power cable, includes the sinle silk body, the sinle silk body outside is equipped with the inner cushion layer, the inner cushion layer outside has twined and has wrapped up around the band layer, first crosslinked polyethylene layer has cup jointed around the band layer outside, it is equipped with the armor to wind between band layer and the first crosslinked polyethylene layer, the sinle silk body is including copper core and conductor shielding layer, the conductor shielding layer outside is equipped with semi-conductive water blocking layer, second crosslinked polyethylene layer has been cup jointed in the semi-conductive water blocking layer outside, open in the first crosslinked polyethylene layer outside has first slot a plurality of groups, open in the second crosslinked polyethylene layer outside has second slot a plurality of groups.

Compared with the traditional polyethylene protective layer, the first crosslinked polyethylene layer and the second crosslinked polyethylene layer which are respectively adopted by the outer sheath of the cable and the outer sheath of the wire core body obviously improve the comprehensive performances of the polyethylene protective layer, such as mechanical property, environmental stress cracking resistance, chemical corrosion resistance, creep resistance, electrical property and the like; the first groove in the first crosslinked polyethylene layer outside and the second groove in the second crosslinked polyethylene layer outside for the cable is whole to be buckled more easily, has less radius when laying the cable in bent angle department, can reduce the use of bent angle department cable.

Preferably, the cross section of the first groove outside the first crosslinked polyethylene layer and the cross section of the second groove outside the second crosslinked polyethylene layer are both trapezoidal structures, the depth of the first groove is one third of the thickness of the first crosslinked polyethylene layer, and the depth of the second groove is one third of the thickness of the second crosslinked polyethylene layer.

The first groove and the second groove which are provided with the trapezoid structures ensure that the tensile capacity of the whole structure of the cable is not obviously attenuated.

Preferably, a plurality of groups of grooves are formed in the outer side of the first crosslinked polyethylene layer, the grooves are of a diamond structure, and the depth of each groove is one eighth of the thickness of the first crosslinked polyethylene layer.

This recess that sets up the first crosslinked polyethylene layer outside has good antiskid effect, and hand draws the cable and has bigger frictional force when laying the cable, draws the cable difficult cunning with first slot cooperation.

Preferably, the armor layer is that a plurality of groups of steel wires wrap up between around band layer and first crosslinked polyethylene layer.

This arrangement of a steel wire armour layer between the wrapping layer and the first cross-linked polyethylene layer gives the cable its characteristics of being more resistant to pulling and being less prone to cutting damage.

Preferably, a polyolefin filling layer is arranged between the outer side of the wire core body and the inner cushion layer.

the polyolefin filling layer arranged between the outer side of the wire core body and the inner cushion layer has protection and insulation effects on the wire core body inside.

Preferably, three groups of wire core bodies are provided with limiting strips therebetween.

this sets up spacing strip and can prevent that the sinle silk body from buckling transition copper core impaired when the cable is buckled.

Drawings

Fig. 1 is a schematic structural view of a cable section of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure of the core body of the present invention;

FIG. 3 is a schematic view of the external structure of the first crosslinked polyethylene layer according to the present invention;

Fig. 4 is a schematic diagram of the external structure of the second crosslinked polyethylene layer of the present invention.

In the figure: 1. a wire core body; 2. an inner cushion layer; 3. wrapping a belt layer; 4. a first crosslinked polyethylene layer; 5. an armor layer; 6. a copper core; 7. a second crosslinked polyethylene layer; 8. a conductor shield layer; 9. a semiconductive water barrier layer; 10. a first trench; 11. a second trench; 12. a groove; 13. a polyolefin filler layer; 14. and (5) a limiting strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a rated voltage crosslinked polyethylene insulated power cable, includes sinle silk body 1, 1 outside of sinle silk body is equipped with inner cushion layer 2, 2 outside twine to wrap up around belting layer 3, first crosslinked polyethylene layer 4 has been cup jointed around the belting layer 3 outside, be equipped with armor 5 around between belting layer 3 and first crosslinked polyethylene layer 4, sinle silk body 1 is including copper core 6 and conductor shielding layer 8, the 8 outside of conductor shielding layer is equipped with semiconduction water blocking layer 9, second crosslinked polyethylene layer 7 has been cup jointed in the 9 outside of semiconduction water blocking layer, it has first slot 10 a plurality of groups to open in the 4 outside of first crosslinked polyethylene layer, open in the 7 outsides of second crosslinked polyethylene layer has 11 a plurality of groups in second slot.

The cross section of the first groove 10 outside the first crosslinked polyethylene layer 4 and the cross section of the second groove 11 outside the second crosslinked polyethylene layer 7 are both trapezoidal structures, the depth of the first groove 10 is one third of the thickness of the first crosslinked polyethylene layer 4, and the depth of the second groove 11 is one third of the thickness of the second crosslinked polyethylene layer 7. A plurality of groups of grooves 12 are formed in the outer side of the first crosslinked polyethylene layer 4, the grooves 12 are of a diamond structure, and the depth of each groove 12 is one eighth of the thickness of the first crosslinked polyethylene layer 4. The armor layer 5 is a plurality of groups of steel wires wrapped between the wrapping tape layer 3 and the first cross-linked polyethylene layer 4. And a polyolefin filling layer 13 is arranged between the outer side of the wire core body 1 and the inner cushion layer 2. And a limiting strip 14 is arranged between the three groups of wire core bodies 1.

The working principle is as follows: the utility model has novel structure, compared with the traditional polyethylene protective layer, the first crosslinked polyethylene layer 4 and the second crosslinked polyethylene layer 7 which are respectively adopted by the outer sheath of the cable and the outer sheath of the wire core body 1 obviously improve the comprehensive performances of the polyethylene protective layer, such as mechanical property, environmental stress cracking resistance, chemical corrosion resistance, creep resistance, electrical property and the like; the first groove 10 on the outer side of the first crosslinked polyethylene layer 4 and the second groove 11 on the outer side of the second crosslinked polyethylene layer 7 enable the whole cable to be bent more easily, the cable is laid at a corner with a smaller radius, and the use of the cable at the corner can be reduced; the limiting strip 14 can prevent the core body 1 from being damaged when the cable is bent and the transition copper core 6 is bent.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a rated voltage crosslinked polyethylene insulated power cable, includes sinle silk body (1), its characterized in that: the utility model discloses a cable core, including sinle silk body (1), inner cushion layer (2) outside is equipped with inner cushion layer (2), inner cushion layer (2) outside twines to be wrapped up in around band layer (3), first crosslinked polyethylene layer (4) have been cup jointed around band layer (3) outside, be equipped with armor (5) around between band layer (3) and first crosslinked polyethylene layer (4), sinle silk body (1) is including copper core (6) and conductor shielding layer (8), the conductor shielding layer (8) outside is equipped with semiconduction water blocking layer (9), second crosslinked polyethylene layer (7) have been cup jointed in semiconduction water blocking layer (9) outside, first slot (10) a plurality of groups have been opened in first crosslinked polyethylene layer (4) outside, second crosslinked polyethylene layer (7) outside is opened has second slot (11) a plurality of groups.

2. A voltage rated cross-linked polyethylene insulated power cable according to claim 1, characterized in that: the cross section of the first groove (10) on the outer side of the first crosslinked polyethylene layer (4) and the cross section of the second groove (11) on the outer side of the second crosslinked polyethylene layer (7) are both in a trapezoidal structure, the depth of the first groove (10) is one third of the thickness of the first crosslinked polyethylene layer (4), and the depth of the second groove (11) is one third of the thickness of the second crosslinked polyethylene layer (7).

3. A voltage rated cross-linked polyethylene insulated power cable according to claim 1, characterized in that: the outer side of the first crosslinked polyethylene layer (4) is provided with a plurality of groups of grooves (12), the grooves (12) are of a diamond structure, and the depth of the grooves (12) is one eighth of the thickness of the first crosslinked polyethylene layer (4).

4. A voltage rated cross-linked polyethylene insulated power cable according to claim 1, characterized in that: the armor layer (5) is formed by wrapping a plurality of groups of steel wires between the wrapping tape layer (3) and the first cross-linked polyethylene layer (4).

5. A voltage rated cross-linked polyethylene insulated power cable according to claim 1, characterized in that: and a polyolefin filling layer (13) is arranged between the outer side of the wire core body (1) and the inner cushion layer (2).

6. A voltage rated cross-linked polyethylene insulated power cable according to claim 1, characterized in that: and a limiting strip (14) is arranged between the three groups of wire core bodies (1).