A uniform cross-section long-life power cable structure

Abstract

The utility model is suitable for cable technical field provides a same section high life power cable structure, including cable main part, the inside of cable main part is equipped with the conductor, the outside of conductor is equipped with the inner screen layer, the outside of inner screen layer is equipped with the insulating layer, the outside of insulating layer is equipped with the outer screen layer, the outside of outer screen layer is equipped with the wrapping layer, is equipped with the filler layer between the wrapping layer and outer screen layer, the outside of wrapping layer is equipped with the armoring layer, preferably, the outside of armoring layer is equipped with the outer protective layer, preferably, the outside of outer screen layer is equipped with the metal shield layer, preferably, the metal shield layer adopts shield copper band single layer left -hand wrapping, preferably, the conductor is equipped with first round single filament, T type single filament and second round single filament from outside to inside in proper order. The utility model reduces the eccentricity of insulation and makes the uniform distribution of insulation electric field, and the equal electric field distribution reduces the insulation breakdown probability, and the service life of cable is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a high-life power cable structure with the same cross-section. Background Technology

[0002] A cable is an electrical or signal transmission device, typically composed of several or groups of conductors, and characterized by internal current conduction and external insulation. Cables can be used to transmit electrical (magnetic) energy and information, realizing the conversion of electromagnetic energy. They are widely used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater power transmission lines across rivers and seas. There are many types of cables, including power cables, control cables, compensating cables, shielded cables, and high-temperature cables. They consist of single or multiple conductors and insulation layers, used to connect circuits and electrical appliances.

[0003] Cables have a wide range of applications, with power supply to buildings being one of their primary functions. As technology advances, the lifespan requirements for building cables are becoming increasingly stringent. How to maximize energy conservation, environmental protection, reduce pollution and waste, provide a healthy and efficient working environment, extend service life, and minimize electrical fires caused by aging and disrepair of cables throughout the building's entire lifespan has always been a key area of ​​cable research.

[0004] Based on the above requirements, this application proposes a high-life power cable structure with the same cross-section. Utility Model Content

[0005] The purpose of this invention is to provide a high-life power cable structure with the same cross-section to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-life power cable structure with the same cross-section, comprising a cable body, a conductor inside the cable body, an inner shield layer outside the conductor, an insulation layer outside the inner shield layer, an outer shield layer outside the insulation layer, a wrapping layer outside the outer shield layer, a filling layer between the wrapping layer and the outer shield layer, and an armor layer outside the wrapping layer.

[0007] Preferably, the armor layer is provided with an outer protective layer.

[0008] Preferably, the outer screen layer is provided with a metal shielding layer on its exterior.

[0009] Preferably, the metal shielding layer is a single layer of shielding copper tape wrapped to the left.

[0010] Preferably, the conductor is provided with a first circular monofilament, a T-shaped monofilament, and a second circular monofilament in sequence from the outside to the inside.

[0011] Preferably, the armor layer is made of metal armor wrapped around the left, and then two layers of wrapping tape are wrapped around in the opposite direction; the filling layer is filled with flame-retardant filling rope and wrapped with flame-retardant wrapping tape.

[0012] This utility model has at least the following beneficial effects:

[0013] This invention provides a high-life power cable structure with the same cross-section. By reducing insulation eccentricity, the insulation electric field distribution becomes uniform, and the balanced electric field distribution reduces the probability of insulation breakdown, thus greatly improving the service life of the cable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the cable cross-section structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the conductor structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the main structure of the cable of this utility model.

[0017] In the attached diagram, the following are the reference numerals: 1. Cable body; 2. Conductor; 3. Inner shield layer; 4. Insulation layer; 5. Outer shield layer; 6. Metallic shield layer; 7. Filler layer; 8. Wrapping layer; 9. Armor layer; 10. Outer sheath layer; 11. First circular monofilament; 12. T-shaped monofilament; 13. Second circular monofilament. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0019] Example

[0020] Please see Figure 1 , Figure 2 and Figure 3This utility model provides a technical solution: a high-life power cable structure with the same cross-section, including a cable body 1, a conductor 2 inside the cable body 1, an inner shield layer 3 outside the conductor 2, an insulation layer 4 outside the inner shield layer 3, specifically, the insulation layer 4 is peroxide cross-linked insulation, an outer shield layer 5 outside the insulation layer 4, a wrapping layer 8 outside the outer shield layer 5, a filling layer 7 between the wrapping layer 8 and the outer shield layer 5, an armor layer 9 outside the wrapping layer 8, an outer sheath 10 outside the armor layer 9, a metal shielding layer 6 outside the outer shield layer 5, the metal shielding layer 6 is a single layer of shielding copper tape wrapped to the left, the conductor 2 is provided with a first circular monofilament 11, a T-shaped monofilament 12 and a second circular monofilament 13 from the outside to the inside, the armor layer 9 is a metal armor wrapped to the left, and then the two layers of wrapping tape are wrapped in the opposite direction; the filling layer 7 is filled with flame-retardant filling rope and wrapped with flame-retardant wrapping tape.

[0021] In this embodiment:

[0022] Conductor 2, inner shield layer 3, insulation layer 4, outer shield layer 5, and metal shield layer 6 together form a wire core, and there are several wire cores;

[0023] A wire drawing machine and a custom mold are used to draw a conductor 2 that combines a first circular monofilament 11, a T-shaped monofilament 12, and a second circular monofilament 13. A three-layer co-extrusion process is used to form an inner screen, peroxide cross-linked insulation, and an outer screen in one step to form insulation. A single layer of shielding copper tape is wrapped to the left to form a metal shield.

[0024] In summary, this application employs multiple combined monofilament structures and a reasonable die configuration for stranding to ensure conductor roundness. Before insulation extrusion, a wire guide is used to appropriately release the stress generated during stranding, ensuring conductor stability before entering the extruder die. Real-time online monitoring data is used to promptly adjust and ensure insulation eccentricity meets requirements. By reducing insulation eccentricity, this application achieves a uniform insulation electric field distribution, and this balanced electric field distribution reduces the probability of insulation breakdown, significantly improving cable lifespan.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-lifespan power cable structure with the same cross-section, characterized in that, The cable includes a cable body (1), a conductor (2) inside the cable body (1), an inner shield layer (3) outside the conductor (2), an insulation layer (4) outside the inner shield layer (3), an outer shield layer (5) outside the insulation layer (4), a wrapping layer (8) outside the outer shield layer (5), a filling layer (7) between the wrapping layer (8) and the outer shield layer (5), and an armor layer (9) outside the wrapping layer (8). The armor layer (9) is provided with an outer protective layer (10); The outer screen layer (5) is provided with a metal shielding layer (6). The metal shielding layer (6) is made by wrapping a single layer of shielding copper tape in a leftward direction.

2. The high-life power cable structure with the same cross-section according to claim 1, characterized in that: The conductor (2) is provided with a first circular monofilament (11), a T-shaped monofilament (12), and a second circular monofilament (13) from the outside to the inside.

3. The high-life power cable structure with the same cross-section according to claim 1, characterized in that: The armor layer (9) is wrapped with metal armor in the left direction, and then wrapped with two layers of wrapping tape in the opposite direction; the filling layer (7) is filled with flame-retardant filling rope and wrapped with flame-retardant wrapping tape.

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