CN211670025U

CN211670025U - Natural heat dissipation type medium voltage cable

Info

Publication number: CN211670025U
Application number: CN202020196676.3U
Authority: CN
Inventors: 赵军法; 张博; 叶汝夏; 张宏图
Original assignee: Zhejiang Qichao Cable Co ltd
Current assignee: Zhejiang Qichao Cable Co ltd
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2020-10-13
Anticipated expiration: 2030-02-21

Abstract

The utility model relates to a cable field especially relates to a natural heat dissipation type middling pressure cable, including cable core and the protective layer of cladding outside the cable core, the cable core has three groups, and two liang tangents between three groups of cable cores, and the cross-section is triangle-shaped, the protective layer includes double-deck steel band armor and polyethylene sheath, and double-deck steel band armor is with three group's cable core cladding externally together, makes to form three air passage between three group's cable cores and the double-deck steel band armor, and the cladding of polyethylene sheath is outside at double-deck steel band armor, through the three air passage who forms, can solve the cable dispel the heat through the space of self.

Description

Natural heat dissipation type medium voltage cable

Technical Field

The utility model relates to a cable field especially relates to a natural heat dissipation type medium voltage cable.

Background

Heretofore, chinese utility model patent that publication number is CN200920047902.5 just discloses a flexible cable, including a plurality of cable cores and oversheath, be equipped with the filling layer between cable core and the oversheath, the outer surface cover of filling layer has a flexible protection cover, and this flexible protection cover is spiral helicine flexible protection cover. The utility model discloses a flexible cable has bending property well, can adapt to the advantage of various use occasions. However, the flexible cable aims to solve the problems that the flexible cable is good in bending performance and can adapt to various use occasions, and the problem that the cable can naturally radiate heat is not solved.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The utility model discloses the purpose provides a natural heat dissipation type medium voltage cable in order to solve the problem that exists among the prior art, and double-deck steel band armor makes three cable cores of three groups and double-deck steel band armor form three air passage together with three cable core packages, has solved the cable can natural radiating problem.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a natural heat dissipation type medium voltage cable, includes cable core and the cladding protective layer outside the cable core, the cable core has three groups, and is two liang tangent between three cable cores, and the cross-section is triangle-shaped, the protective layer includes double-deck steel band armor and polyethylene sheath, and double-deck steel band armor is with three cable core cladding of group cladding together outside for form three air passage of group between double-deck steel band armor and three cable cores of group, the polyethylene sheath cladding is outside at double-deck steel band armor.

Preferably, the cable core includes the conductor, the cladding is at the internal shield layer in the conductor outside, the crosslinked polyethylene insulating layer in the cladding is in the internal shield layer outside, the cladding is at the external shield layer in the crosslinked polyethylene insulating layer outside, the cladding is at the copper strips shielding layer in the external shield layer outside, the cladding is at the buffer layer in the copper strips shielding layer outside, the cladding is at the split-phase sheath constitution in the buffer layer outside.

Preferably, the conductor is composed of a plurality of wires.

Preferably, the wire is hexagonal in cross section.

3. Has the advantages that:

a natural heat dissipation type medium voltage cable, including cable core and the protective layer of cladding outside the cable core, pass through double-deck steel band armour package by three cable cores and be in the same place to the cladding is in the outside of cable core, forms three air passage of group between three cable cores of group and the double-deck steel band armour, and the heat of production can be scattered through the passageway, has solved the cable and can natural radiating problem.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention

In the figure, 1, a cable core; 11. the split-phase cable comprises a conductor, 11a, a lead, 12, an inner shielding layer, 13, a cross-linked polyethylene insulating layer, 14, an outer shielding layer, 15, a copper strip shielding layer, 16, a buffer layer, 17 and a split-phase sheath; 2. and the protective layer 21 is a double-layer steel tape armor 22 and is a polyethylene sheath.

Detailed Description

The drawings in the embodiments of the present invention will be combined; the technical solution of the embodiment of the present invention is clearly and completely described. Obviously, the embodiments described are only a part of the embodiments of the present invention, and not all of the embodiments are based on the embodiments of the present invention. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.

As shown in fig. 1, a natural heat dissipation type medium voltage cable, including cable core 1 and the cladding at the protective layer 2 of cable core 1 outside, wherein cable core 1 has three groups, three cable core 1 of group are placed through two liang of tangent modes in the outside, protective layer 2 includes double-deck steel strip armor 21 and polyethylene sheath 22, double-deck steel strip armor 21 has reinforcing tensile strength, mechanical protection such as compressive strength prolongs life outside, can also improve the cable interference killing feature through the shielding protection, double-deck steel strip armor 21 wraps three 1 two liang of tangent modes of cable core of group together, the cross-section is triangular shape, the cladding is in the outside of cable core 1, three air duct of group formation between cable core 1 of group respectively and the double-deck steel strip armor 21, can distribute away the heat that the cable core produced by oneself through three air duct of group, play radiating. The polyethylene sheath 22 has excellent low temperature resistance and excellent electrical insulation, and is wrapped outside the double-layer steel tape armor 21.

The cable conductor 11 is formed by twisting a plurality of wires 11a, an air gap is easily formed between the cable conductor and the crosslinked polyethylene insulating layer 13, the surface of the cable conductor 11 is not smooth, electric field concentration is caused, an inner shield layer 12 of semi-conductive material is applied to the surface of the conductor and is equipotential to the shielded conductor 11, and is in good contact with the crosslinked polyethylene insulating layer 13, thereby preventing partial discharge from occurring between the conductor 11 and the crosslinked polyethylene insulating layer 13, the inner shielding layer 12 is coated with a crosslinked polyethylene insulating layer 13 which has light weight, good heat resistance, strong loading capacity, no melting, chemical corrosion resistance and high mechanical strength, an outer shielding layer 14 of semiconductive material is further coated outside the crosslinked polyethylene insulating layer 13, and has good contact with the shielded crosslinked polyethylene insulating layer 13, equipotential with the metal sheath, so that partial discharges between the insulating layer 13 of crosslinked polyethylene and the sheath are avoided. And a copper strip shielding layer 15 is coated outside the outer shielding layer 14 to avoid the interference of high-voltage alternating current to external facilities and signals, a buffer layer 16 is coated on the copper strip shielding layer 15, and a phase-splitting sheath 17 is coated on the outer side of the buffer layer 16.

The conductor 11 is composed of a plurality of wires 11a, and the cross section of the wire 11a is a regular hexagon.

The above description is only the preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; according to the technical scheme of the utility model and the improvement conception, equivalent substitution or change is carried out; are all covered by the protection scope of the utility model.

Claims

1. A natural heat dissipation type medium voltage cable is characterized by comprising cable cores (1) and a protective layer (2) coated outside the cable cores (1), wherein the cable cores (1) are provided with three groups, and every two of the three groups of cable cores (1) are arranged in a tangent mode; the protective layer (2) comprises a double-layer steel tape armor (21) and a polyethylene sheath (22), the three groups of cable cores (1) are wrapped outside by the double-layer steel tape armor (21), the cross section is triangular after wrapping, and the polyethylene sheath (22) is wrapped outside the double-layer steel tape armor (21).

2. The natural heat dissipation type medium voltage cable according to claim 1, wherein the cable core (1) comprises a conductor (11), an inner shielding layer (12) is coated on the outer side of the conductor (11), a cross-linked polyethylene insulating layer (13) is coated on the outer side of the inner shielding layer (12), an outer shielding layer (14) is coated on the outer side of the cross-linked polyethylene insulating layer (13), a copper strip shielding layer (15) is coated on the outer side of the outer shielding layer (14), a buffer layer (16) is coated on the outer side of the copper strip shielding layer (15), and a split-phase sheath (17) is coated on the outer side of the buffer layer (16).

3. A natural heat dissipation medium voltage cable according to claim 2, wherein the conductor (11) is composed of a plurality of wires (11 a).

4. A natural heat dissipation type medium voltage cable as claimed in claim 3, wherein the conductive wire (11a) has a hexagonal cross-section.