A medium-voltage power cable with a corrosion-resistant outer sheath structure

Abstract

This utility model relates to the field of cable technology and discloses a medium-voltage power cable with an anti-corrosion outer sheath structure, including an outer sheath and a conductor. A metal sheath is disposed inside the outer sheath, and an inner sheath is disposed inside the metal sheath. Several protruding strips are fixed to the outer side of the outer sheath. This utility model, by providing protruding strips, an outer sheath, a metal sheath, and an inner sheath, enables the medium-voltage power cable to achieve efficient anti-corrosion protection during use. Furthermore, the multiple sets of protruding strips evenly spaced on the outer side of the outer sheath support the cable body when it contacts the ground, isolating it from the ground. This effectively reduces wear on the outer side of the cable body during dragging and moving, facilitating efficient anti-corrosion protection of the cable's outer side.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a medium-voltage power cable with a corrosion-resistant outer sheath structure. Background Technology

[0002] Medium-voltage power cables refer to power cables with rated voltages between 6kV and 35kV. They are mainly used in power transmission and distribution systems and are commonly found in urban power grids, industrial power supply, mining, and rail transportation. However, in actual use, the outer sheath of medium-voltage power cables is generally a single layer, which has limited corrosion resistance. Corrosive substances can easily penetrate the sheath and enter the cable. Furthermore, the flat surface of the sheath means that during construction and movement, a large area of ​​the outer sheath will contact the ground, causing significant wear and reducing its service life. Therefore, there are no effective corrosion protection measures available for the outer side of medium-voltage power cables.

[0003] Now, a new type of medium-voltage power cable with a corrosion-resistant outer sheath structure is proposed to address the above-mentioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide a medium-voltage power cable with a corrosion-resistant outer sheath structure to solve the problem mentioned in the background art of the inconvenience of effectively protecting the outer side of medium-voltage power cables from corrosion.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a medium-voltage power cable with an anti-corrosion outer sheath structure, comprising an outer sheath and a conductor, wherein a metal sheath is provided on the inner side of the outer sheath, and an inner sheath is provided on the inner side of the metal sheath, and a plurality of protrusions are fixed on the outer side of the outer sheath.

[0006] As a further technical solution of this utility model, a plurality of the convex strips are distributed in a ring at equal intervals on the outer side of the outer sheath.

[0007] As a further technical solution of this utility model, the outer side of the outer sheath is provided with a plurality of inner grooves, and the interior of the plurality of inner grooves is respectively provided with reflective strips.

[0008] As a further technical solution of this utility model, the inner grooves and reflective strips are distributed at equal intervals.

[0009] As a further technical solution of this utility model, a fire-resistant coating is provided on the outer side of the outer sheath.

[0010] As a further technical solution of this utility model, the inner side of the inner sheath is provided with a wrapping layer, the inner side of the wrapping layer is provided with a waterproof layer, and the inner side of the waterproof layer is provided with an outer shielding layer.

[0011] As a further technical solution of this utility model, three sets of conductors are arranged in an annular pattern at equal intervals on the inner side of the outer shielding layer.

[0012] As a further technical solution of this utility model, an insulating layer is provided on the outside of each of the three sets of conductors, and a copper strip shielding layer is provided on the outside of the insulating layer, and a filler is provided on the outside of the three sets of copper strip shielding layers.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up convex strips, an outer sheath, a metal sheath, and an inner sheath, when the medium-voltage power cable is used, the multi-layer anti-corrosion protection structure composed of an outer sheath, a metal sheath, and an inner sheath on the outside of the cable can provide efficient anti-corrosion protection for the outside of the cable. At the same time, by setting up multiple sets of convex strips at equal intervals on the outside of the outer sheath, when the cable contacts the ground, the several convex strips on the outside can support the cable body and isolate it from the ground. During dragging and moving, the wear on the outside of the cable body can be effectively reduced, which facilitates efficient anti-corrosion protection for the outside of the cable.

[0014] With an outer sheath, inner groove, and reflective strips, the power cable can reflect light when exposed at night by using several reflective strips that are evenly spaced on the outside of the cable, which can help to provide auxiliary warning and positioning of the cable's location.

[0015] With an outer sheath and fire-resistant coating, the power cable is used with a fire-resistant coating applied to the outside of the cable. When exposed to high temperatures, the outer fire-resistant coating can form a carbonized layer or a heat insulation layer. Through its porous structure, it reflects and absorbs heat from the outside, reducing the surface temperature of the cable and facilitating flame-retardant and fire-resistant protection of the cable's exterior. Attached Figure Description

[0016] Figure 1 This is a frontal cross-sectional view of the present invention.

[0017] Figure 2 This is a partial side view of the structure of this utility model;

[0018] Figure 3 This is a magnified front view of the reflective strip structure of this utility model;

[0019] Figure 4 This utility model Figure 1 A magnified structural diagram at point A in the diagram.

[0020] In the diagram: 1. Raised strip; 2. Outer sheath; 3. Metal sheath; 4. Inner sheath; 5. Wrapping tape layer; 6. Waterproof layer; 7. Outer shielding layer; 8. Filler; 9. Copper tape shielding layer; 10. Insulation layer; 11. Conductor; 12. Inner groove; 13. Reflective tape; 14. Fire-resistant coating. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides an embodiment: a medium-voltage power cable with a corrosion-resistant outer sheath structure, including an outer sheath 2 and a conductor 11. A metal sheath 3 is provided on the inner side of the outer sheath 2, and an inner sheath 4 is provided on the inner side of the metal sheath 3. A plurality of protrusions 1 are fixed on the outer side of the outer sheath 2, and the plurality of protrusions 1 are distributed in a ring at equal intervals on the outer side of the outer sheath 2.

[0023] Furthermore, the outer sheath 2 and the inner sheath 4 are made of polytetrafluoroethylene.

[0024] Specifically, such as Figure 1 and Figure 2 As shown, by setting an outer sheath 2, a metal sheath 3 and an inner sheath 4 on the outside of the cable, a multi-layer anti-corrosion protection structure can be set up to provide efficient anti-corrosion protection for the outside of the cable. At the same time, by setting multiple sets of protruding strips 1 at equal intervals on the outside of the outer sheath 2, when the cable contacts the ground, several protruding strips 1 on the outside can support the cable body and isolate it from the ground. During dragging and moving, the wear on the outside of the cable body can be effectively reduced, which facilitates efficient anti-corrosion protection for the outside of the cable.

[0025] The outer sheath 2 has several inner grooves 12 on its outer side, and reflective strips 13 are respectively arranged inside the several inner grooves 12. The several inner grooves 12 and reflective strips 13 are distributed at equal intervals.

[0026] Specifically, such as Figures 1-3 As shown, by using several reflective strips 13 evenly spaced on the outside of the cable, when the cable is exposed at night, the light from the outside can be reflected, which facilitates auxiliary warning and positioning of the cable's location.

[0027] The outer side of the outer sheath 2 is provided with a fire-resistant coating 14;

[0028] Furthermore, the refractory coating 14 is made of polyacrylonitrile pre-oxidized fiber material;

[0029] Specifically, such as Figure 1 and Figure 4As shown, after the fire-resistant coating 14 is applied to the outside of the cable, the fire-resistant coating 14 can form a carbonized layer or a heat insulation layer after being subjected to high temperature. Through the porous structure, it reflects and absorbs the heat from the outside, reducing the surface temperature of the cable and facilitating flame-retardant and fire-proof protection of the outside of the cable.

[0030] The inner sheath 4 has a wrapping layer 5 inside, a waterproof layer 6 inside the wrapping layer 5, and an outer shielding layer 7 inside the waterproof layer 6. Three sets of conductors 11 are arranged in a ring at equal intervals inside the outer shielding layer 7. An insulation layer 10 is arranged outside each of the three sets of conductors 11, and a copper strip shielding layer 9 is arranged outside the insulation layer 10. A filler 8 is arranged outside the three sets of copper strip shielding layers 9.

[0031] Working Principle: When using medium-voltage power cables, a multi-layered anti-corrosion protection structure consisting of an outer sheath 2, a metal sheath 3, and an inner sheath 4 provides multi-layered and highly efficient anti-corrosion protection for the cable's exterior. Simultaneously, multiple sets of protruding strips 1 are evenly spaced on the outer side of the outer sheath 2. When the cable contacts the ground, these protruding strips 1 support the cable body, isolating it from the ground and effectively reducing wear on the outer side of the cable body during dragging and moving. Furthermore, when using power cables, several reflective strips 13 are evenly spaced on the outer side of the cable. When installed exposed at night, these reflective strips reflect light, providing auxiliary reflective warning and positioning of the cable's location. Finally, when using power cables, a fire-resistant coating 14 is applied to the outer side of the cable. Upon exposure to high temperatures, the fire-resistant coating 14 forms a carbonized layer or a heat-insulating layer. Its porous structure reflects and absorbs heat from the outside, reducing the cable's surface temperature and providing flame-retardant and fire-resistant protection for the cable's exterior.

[0032] It will be apparent to those skilled in the art that this invention 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 essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. Medium voltage power cable with an anticorrosive outer sheath construction comprising an outer sheath (2) and a conductor (11), characterized in that: The outer sheath (2) is provided with a metal sheath (3) on its inner side, and an inner sheath (4) is provided on the inner side of the metal sheath (3). Several protrusions (1) are fixed on the outer side of the outer sheath (2).

2. A medium voltage power cable with an anti-corrosion outer sheath structure according to claim 1, characterized in that: Several of the aforementioned protrusions (1) are distributed in a ring at equal intervals on the outer side of the outer sheath (2).

3. A medium voltage power cable with an anti-corrosion outer sheath structure according to claim 2, characterized in that: The outer sheath (2) has several inner grooves (12) on its outer side, and reflective strips (13) are respectively provided inside the several inner grooves (12).

4. A medium voltage power cable with an anti-corrosion outer sheath structure according to claim 3, characterized in that: The inner grooves (12) and reflective strips (13) are distributed at equal intervals.

5. A medium voltage power cable with an anti-corrosion outer sheath structure according to claim 1, characterized in that: The outer sheath (2) is provided with a fire-resistant coating (14) on its outer side.

6. A medium voltage power cable with an anti-corrosion outer sheath structure according to claim 1, characterized in that: The inner sheath (4) is provided with a wrapping layer (5) on the inner side, a waterproof layer (6) is provided on the inner side of the wrapping layer (5), and an outer shielding layer (7) is provided on the inner side of the waterproof layer (6).

7. A medium voltage power cable with an anti-corrosion outer sheath structure according to claim 6, characterized in that: The outer shielding layer (7) has three sets of conductors (11) arranged in a ring at equal intervals on its inner side.

8. A medium voltage power cable with an anti-corrosion outer sheath structure according to claim 1, characterized in that: The three sets of conductors (11) are respectively provided with an insulating layer (10) on the outside, and a copper strip shielding layer (9) is provided on the outside of the insulating layer (10), and a filler (8) is provided on the outside of the three sets of copper strip shielding layers (9).

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