CN210692143U

CN210692143U - High-voltage fireproof cable

Info

Publication number: CN210692143U
Application number: CN201921754468.4U
Authority: CN
Inventors: 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: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-06-05
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a high-voltage fireproof cable, cable core that constitutes including three insulation core transposition and cladding in proper order the outside high temperature glass fiber tape of cable core is around covering, armor, aluminium foil sticky tape water-blocking layer, fire-resistant asbestos cloth layer and fire-retardant oversheath, the cable core with high temperature glass fiber tape is filled with fire prevention mud around the space intussuseption between the covering, insulation core includes the inner conductor and cladding in proper order the outside semiconductor internal shield layer, insulating layer, the outer insulation shielding layer of semiconductor, metallic shield layer, polyester film winding layer and the insulation fire prevention area winding layer of inner conductor. The cable is good in flexibility, strong in fire resistance and flame retardance, and good in heat dissipation performance.

Description

High-voltage fireproof cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a high-voltage fireproof cable.

Background

In recent years, the domestic economy continues to grow rapidly, and a huge market space is provided for the power cable industry. The development of the whole industry has the conditions of low concentration, dispersed technical strength and the like. Fireproof cables produced in the past are mostly low-voltage cables, and as the high-voltage cables are thick in insulation thickness and can generate a large amount of heat value release during combustion, medium-voltage fireproof cables on the market are not numerous, but along with improvement of fireproof requirements, requirements of various industries on cable products develop towards high performance and high quality, medium-voltage and high-voltage fireproof cables are increasingly adopted, different technological requirements exist on the fireproof cables in design, and the safety performance can be guaranteed only by having a more reliable fireproof function.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a high-pressure fireproof cable, and the pliability is good, and fire-resistant flame retardant property is strong, and has good thermal diffusivity.

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

High-voltage fireproof cable, including the cable core that three insulation core transposition constitute and cladding in proper order the outside high temperature glass fiber tape of cable core is around covering, armor, aluminium foil sticky tape water-blocking layer, fire-resistant asbestos cloth layer and fire-retardant oversheath, the cable core with the space intussuseption between the high temperature glass fiber tape is filled with fire prevention mud around the covering, insulation core includes the inner conductor and cladding in proper order the outside semiconductor internal shield layer, insulating layer, the outer insulating shielding layer of semiconductor, metal shielding layer, polyester film winding layer and the insulating fire prevention area winding layer of inner conductor.

Preferably, the flame-retardant outer sheath is a PVC or PE sheath.

Preferably, the semiconductor inner shielding layer and the semiconductor outer insulating shielding layer are both EVA resin layers.

Preferably, the insulating layer is a polyethylene resin layer.

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

Preferably, the metal shielding layer is formed by spirally winding and weaving polyester fiber copper foil filaments and tin-plated copper monofilaments in opposite directions.

Preferably, the winding layer of the insulating fireproof belt is of a unidirectional spiral winding structure of the insulating fireproof belt, and the insulating fireproof belt is of a double-layer bonding integrated structure of a cross-linked polyethylene resin layer and a mica belt layer.

Preferably, the armor layer is galvanized steel wire armor.

The utility model has the advantages that: adopt fire prevention mud as filler material, for preventing that fire prevention mud from producing the corruption to the metallic shield layer, the outside cladding of inner conductor has insulating fire prevention area winding layer, play better fire prevention thermal-insulated effect, there is aluminium foil sticky tape water blocking layer around the outside cladding of covering at high temperature glass fiber tape, fire-resistant asbestos cloth layer and fire-retardant oversheath, make the cable inlayer insulation receive multilayer fire prevention and thermal-insulated effect, prolong heat-conduction to the inside time of cable core, effectively reduce the temperature in the cable core, good heat dissipation, the effectual safe normal operating of cable of having ensured. Inside aluminium foil sticky tape water blocking layer effectively prevented water invasion cable, improved the safe practicality of cable. The structural design of the metal shielding layer and the insulating fireproof belt winding layer is favorable for improving the flexibility of the cable. The multilayer shielding effectively improves the shielding performance of the cable and ensures the safety and reliability of power transmission.

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 structural view of an embodiment of the present application;

fig. 2 is a schematic cross-sectional structure view of an insulated wire core according to an embodiment of the present application;

reference numerals: 1-an insulating wire core, 2-a high-temperature glass fiber tape wrapping layer, 3-a fireproof asbestos cloth layer, 4-a flame-retardant outer sheath, 5-an inner conductor, 6-a semiconductor inner shielding layer, 7-an insulating layer, 8-a semiconductor outer insulating shielding layer, 9-a metal shielding layer, 10-a polyester film winding layer, 11-an aluminum foil tape water-blocking layer, 12-an insulating fireproof tape winding layer, 13-fireproof mud and 14-an armor layer.

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 and 2, the utility model discloses high-pressure fireproof cable, including the cable core that three insulation core 1 transposition constitutes and cladding in proper order the outside high temperature glass fiber tape of cable core is around covering 2, armor 14, aluminium foil sticky tape water blocking layer 11, fire resistant asbestos cloth layer 3 and fire-retardant oversheath 4, the cable core with high temperature glass fiber tape is filled with fire prevention mud 13 around the space intussuseption between covering 2. Specifically, the high-temperature glass fiber tape wrapping layer 2 is of a two-layer wrapping structure, and the flame-retardant outer sheath 4 is preferably a PVC or PE sheath. The armor layer 14 is a galvanized steel wire armor.

As shown in fig. 2, the insulated wire core 1 includes an inner conductor 5, and a semiconductor inner shielding layer 6, an insulating layer 7, a semiconductor outer insulating shielding layer 8, a metal shielding layer 9, a polyester film winding layer 10 and an insulated fireproof tape winding layer 12 which are sequentially coated outside the inner conductor 5. The inner conductor 5 is a tinned copper stranded wire. The semiconductor inner shielding layer 6 and the semiconductor outer insulating shielding layer 8 are both EVA resin layers. The insulating layer 7 is a polyethylene resin layer. The metal shielding layer 9 is formed by weaving polyester fiber copper foil wires and tin-plated copper monofilaments in a reverse spiral winding mode. The insulating fireproof belt winding layer 12 is of an insulating fireproof belt unidirectional spiral winding structure, and the insulating fireproof belt is of a double-layer bonding integrated structure of a cross-linked polyethylene resin layer and a mica belt layer.

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. High-voltage fireproof cable, characterized by: the cable core that constitutes including three insulation core (1) transposition and cladding in proper order the outside high temperature glass fiber tape of cable core is around covering (2), armor (14), aluminium foil sticky tape water-blocking layer (11), fire-resistant asbestos cloth layer (3) and fire-retardant oversheath (4), the cable core with the space intussuseption between covering (2) is filled with fire prevention mud (13) to high temperature glass fiber tape, insulation core (1) includes inner conductor (5) and cladding in proper order in outer semiconductor internal shield layer (6), insulating layer (7), semiconductor external insulation shielding layer (8), metal shielding layer (9), polyester film winding layer (10) and insulating fire prevention area winding layer (12) of inner conductor (5).

2. The high-voltage fireproof cable of claim 1, wherein: the flame-retardant outer sheath (4) is a PVC or PE sheath.

3. The high-voltage fireproof cable of claim 1, wherein: the semiconductor inner shielding layer (6) and the semiconductor outer insulating shielding layer (8) are both EVA resin layers.

4. The high-voltage fireproof cable of claim 1, wherein: the insulating layer (7) is a polyethylene resin layer.

5. The high-voltage fireproof cable of claim 1, wherein: the inner conductor (5) is a tinned copper stranded wire.

6. The high-voltage fireproof cable of claim 1, wherein: the metal shielding layer (9) is formed by spirally winding and weaving polyester fiber copper foil filaments and tin-plated copper monofilaments in opposite directions.

7. The high-voltage fireproof cable of claim 1, wherein: the insulating fireproof belt winding layer (12) is of an insulating fireproof belt unidirectional spiral winding structure, and the insulating fireproof belt is of a double-layer bonding integrated structure of a cross-linked polyethylene resin layer and a mica belt layer.

8. The high-voltage fireproof cable of claim 1, wherein: the armor layer (14) is galvanized steel wire armor.