CN210692135U

CN210692135U - Flexible ceramic silicon rubber protection single-core fireproof cable

Info

Publication number: CN210692135U
Application number: CN201921888979.5U
Authority: CN
Inventors: 杨兆文; 徐季新; 黄建卫; 张天成; 王世军; 黄桂领
Original assignee: Zhejiang Zetastone Special Cable Co ltd
Current assignee: Zhejiang Zetastone Special Cable Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-06-05
Anticipated expiration: 2029-11-05

Abstract

The utility model discloses a single core fireproof cable of soft type pottery silicon rubber protection, include the inner conductor and in proper order the cladding be in the outside EVA semiconductor inner shield layer of inner conductor, XLPE insulating layer, the outer shielding layer of EVA semiconductor, PET semiconductor are around band layer, metallic shield layer, PE water blocking layer, pottery silicon rubber insulating layer, high temperature glass fiber tape around covering, fire-resistant mica tape layer, armor and EPDM oversheath. The cable adopts ceramic silicon rubber to replace fire clay for heat insulation and oxygen insulation, and has the characteristics of multilayer fire resistance, high fire resistance and flame retardance and better electrical insulation property.

Description

Flexible ceramic silicon rubber protection single-core fireproof cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a single core fireproof cable of soft type pottery silicon rubber protection.

Background

With the continuous improvement of the power high-voltage technology and the related technology of the ultra-high power transmission system and the continuous acceleration of the global urbanization process, the crosslinked polyethylene high-voltage power cable is adopted by more and more power distribution systems and power grids due to the excellent characteristics of excellent performance, simple and easy manufacturing safety process and the like. Crosslinked polyethylene high voltage power cables have incomparable advantages in dry environments over other types of power cable products in terms of electrical and mechanical parameters. The oxygen barrier layer of various crosslinked polyethylene fireproof cables in the current market basically adopts a fireproof mud form, and the material has good fireproof and oxygen barrier effects but has two obvious defects, namely: the oxygen isolation layer of the fireproof mud is not insulated, short circuit can be caused if the fireproof mud is not well cleaned during installation, the material of the oxygen isolation layer can be hardened after a long time, the fireproof mud is not well laid during installation, and a cable sheath layer is easily broken when a cable is straightened.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a single core fireproof cable of soft type pottery silicon rubber protection, adopts pottery silicon rubber to replace fire clay thermal-insulated oxygen that separates, and the inside multilayer fire behavior that forms of cable has high fire-resistant flame retardant property and better electric insulating property.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

The flexible ceramic silicon rubber protection single-core fireproof cable comprises an inner conductor, an EVA semiconductor inner shielding layer, an XLPE insulating layer, an EVA semiconductor outer shielding layer, a PET semiconductor winding wrapping tape layer, a metal shielding layer, a PE water blocking layer, a ceramic silicon rubber heat insulation layer, a high-temperature glass fiber tape wrapping layer, a fire-resistant mica tape layer, an armor layer and an ethylene propylene diene monomer outer sheath, wherein the EVA semiconductor inner shielding layer, the XLPE insulating layer, the EVA semiconductor outer shielding layer, the PET semiconductor winding wrapping tape layer, the metal shielding layer.

Preferably, the PE water-blocking layer is formed by co-extrusion of an MDPE water-blocking inner layer on the inner side and an LDPE water-blocking outer layer on the outer side.

Preferably, the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is from 1:10 to 1: 12.

Preferably, the thickness of the PET semiconductor wrapping tape layer is 0.1mm to 0.4 mm.

Preferably, the bandwidth of the PET semiconductor wrapping tape layer is 40mm to 65 mm.

Preferably, the metal shielding layer is formed by spirally winding tin-plated copper monofilaments with the diameter of 0.4mm to 0.6 mm.

Preferably, the armor layer is galvanized steel wire armor.

Preferably, the inner conductor is a tinned copper stranded wire.

Preferably, the thicknesses of the EVA semiconductor inner shielding layer and the EVA semiconductor outer shielding layer are both 0.2mm to 2 mm.

Preferably, the thickness of the XLPE insulating layer is 3mm to 10 mm.

The utility model has the advantages that:

1. the ceramic silicon rubber is used as a heat insulation layer, so that the ceramic silicon rubber has good electrical insulation performance and heat and oxygen insulation effects, and can not cause hardening no matter how long the ceramic silicon rubber is stored, and has no influence on installation at any time.

The PE water-blocking layer is formed by double-layer co-extrusion of an MDPE water-blocking inner layer and an LDPE water-blocking outer layer, the thickness proportion of the inner layer and the outer layer is optimally designed, even under the working condition that the humidity is obviously higher, the PE water-blocking layer can effectively prevent moisture from invading the interior, the insulating electrical characteristics of the cable are protected, and the service life is prolonged.

3. The ceramic silicon rubber is used as a heat insulation layer to form a multi-layer fireproof characteristic with the high-temperature glass fiber tape wrapping layer and the fire-resistant mica tape layer, so that the time of heat conduction to the inside of the cable is effectively prolonged, the temperature in the inside of the cable is reduced, and the safe and normal operation of the cable is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Reference numerals: the cable comprises an inner conductor 1, an EVA semiconductor inner shielding layer 2, an XLPE insulating layer 3, an EVA semiconductor outer shielding layer 4, a PET semiconductor wrapping tape layer 5, a metal shielding layer 6, a PE water-resistant layer 7, a silicon rubber ceramic heat-insulating layer 8, a high-temperature glass fiber tape wrapping layer 9, a fireproof mica tape layer 10, an armor layer 11 and an ethylene propylene diene monomer outer sheath 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model discloses single core fireproof cable of soft type pottery silicon rubber protection, include inner conductor 1 and the cladding in proper order the EVA semiconductor internal shield layer 2 of inner conductor 1 outside, XLPE insulating layer 3, EVA semiconductor external shield layer 4, PET semiconductor are around band layer 5, metallic shield 6, PE water blocking layer 7, pottery silicon rubber insulating layer 8, the fine area of high temperature glass are around covering 9, fire-resistant mica band layer 10, armor 11 and EPDM oversheath 12. The inner conductor 1 is a tinned copper stranded wire. The thicknesses of the EVA semiconductor inner shielding layer 2 and the EVA semiconductor outer shielding layer 4 are preferably 0.2mm to 2 mm. The thickness of the XLPE insulating layer 3 is preferably 3mm to 10 mm. The PE water-blocking layer 4 is formed by co-extruding an MDPE water-blocking inner layer on the inner side and an LDPE water-blocking outer layer on the outer side, and the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1: 10-1: 12. The thickness of the PET semiconductor wrapping tape layer 5 is 0.1mm to 0.4 mm. The bandwidth of the PET semiconductor wrapping tape layer 5 is 40mm to 65 mm. The metal shielding layer 6 is formed by spirally winding tinned copper monofilaments with the diameter of 0.4mm to 0.6 mm. The armor layer 11 is galvanized steel wire armor.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The soft ceramic silicon rubber protection single-core fireproof cable is characterized in that: the cable comprises an inner conductor (1), an EVA semiconductor inner shielding layer (2), an XLPE insulating layer (3), an EVA semiconductor outer shielding layer (4), a PET semiconductor winding tape layer (5), a metal shielding layer (6), a PE water blocking layer (7), a ceramic silicon rubber heat-insulating layer (8), a high-temperature glass fiber tape winding layer (9), a fire-resistant mica tape layer (10), an armor layer (11) and an ethylene propylene diene monomer outer sheath (12) which are sequentially coated outside the inner conductor (1).

2. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the PE water-resistant layer (7) is formed by co-extrusion of an MDPE water-resistant inner layer on the inner side and an LDPE water-resistant outer layer on the outer side.

3. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 2, wherein: the thickness ratio of the MDPE water-blocking inner layer to the LDPE water-blocking outer layer is 1:10 to 1: 12.

4. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the thickness of the PET semiconductor wrapping tape layer (5) is 0.1 mm-0.4 mm.

5. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the bandwidth of the PET semiconductor wrapping tape layer (5) is 40mm to 65 mm.

6. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the metal shielding layer (6) is formed by spirally winding tinned copper monofilaments with the diameter of 0.4mm to 0.6 mm.

7. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the armor layer (11) is galvanized steel wire armor.

8. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the inner conductor (1) is a tinned copper stranded wire.

9. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the thickness of the EVA semiconductor inner shielding layer (2) and the thickness of the EVA semiconductor outer shielding layer (4) are both 0.2mm to 2 mm.

10. The flexible ceramic silicon rubber protective single-core fireproof cable according to claim 1, wherein: the thickness of the XLPE insulating layer (3) is 3mm to 10 mm.