Bending-resistant power cable

Abstract

The utility model discloses an anti-bending power cable, which comprises at least three conductor wire cores, an inner sheath and an outer sheath, the conductor wire cores are arranged on the inner side of the inner sheath, the inner sheath comprises a tubular body, a core body and a plurality of connecting rib groups, the core body is arranged at the center of the tubular body and extends along the axial direction of the tubular body, and the connecting rib groups are arranged at intervals along the axial direction. Each connecting rib group is provided with at least two connecting ribs which are distributed at intervals in the circumferential direction, each connecting rib is connected between the inner wall of the tubular body and the tubular body in the radial direction, so that an accommodating area is formed between any two connecting ribs which are adjacently arranged in the circumferential direction, and a conductor wire core is arranged in each accommodating area; and the tubular body, the core body and the connecting ribs of the inner sheath are of an integrally formed structure. According to the utility model, the flexibility, the distortion resistance, the structural strength and the fracture resistance of the cable can be improved, the stability of the structure and the position of the conductive wire core in the use process can be improved, and the use safety is improved.

Description

Technical Field

[0001] This utility model relates to a bending-resistant power cable, belonging to the field of cable technology. Background Technology

[0002] With continuous investment in power grid construction and the increasing scale of the power grid, especially in urban power grids, cables are typically laid underground due to limitations imposed by the corridor layout and urban aesthetics. Currently, underground power cable laying usually involves methods such as burying cables in conduits or erecting them in cable trenches, which are influenced by terrain and the environment. When cables are used in locations with frequent bending, repeated bending or bending radii that are too small can easily lead to breakage and other safety hazards. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a bending-resistant power cable that can improve the cable's flexibility, torsion resistance, structural strength and fracture resistance, as well as improve the stability of the conductive core structure and position during use, thereby improving the safety of use.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a bending-resistant power cable, comprising: at least 3 conductor cores, an inner sheath and an outer sheath, wherein the conductor cores are disposed inside the inner sheath, and the inner sheath comprises a tubular body, a core disposed at the center of the tubular body and extending along the axial direction of the tubular body, and a plurality of connecting rib groups spaced apart along the axial direction, each of the connecting rib groups having at least 2 connecting ribs spaced apart circumferentially, each of the connecting ribs being radially connected between the inner wall of the tubular body and the tubular body, thereby forming an accommodating area between any two circumferentially adjacent connecting ribs, and each accommodating area being provided with one conductor core.

[0005] The following are further improvements to the above technical solution:

[0006] 1. In the above scheme, the tubular body, core and connecting rib of the inner sheath are integrally formed.

[0007] 2. In the above scheme, at least one reinforcing rope extending axially runs through the core.

[0008] 3. In the above scheme, the reinforcing rope is a polyester fiber rope.

[0009] 4. In the above scheme, the conductor core further includes a conductor formed by twisting together several conductive wires and an insulating layer covering the outside of the conductor.

[0010] 5. In the above scheme, each conductor core is tangentially arranged to the inner wall of the tubular body of the inner sheath, the outer surface of the core, and the connecting rib.

[0011] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0012] This utility model relates to an anti-bending power cable, the inner sheath of which includes a tubular body, a core located at the center of the tubular body and extending axially along the tubular body, and several axially spaced connecting rib groups. Each connecting rib group has at least two circumferentially spaced connecting ribs, and each connecting rib is radially connected between the inner wall of the tubular body and the tubular body, thereby forming a receiving area between any two circumferentially adjacent connecting ribs. Each receiving area contains one conductor core, which can improve the cable's flexibility, torsion resistance, structural strength, and fracture resistance, and also improve the stability of the conductor core structure and position during use, thus improving safety. Furthermore, at least one axially extending reinforcing rope runs through the core, further improving the overall tensile strength and structural strength of the cable. Attached Figure Description

[0013] Appendix Figure 1 This is a structural schematic diagram of Example 1 of the present invention, an anti-bending power cable;

[0014] Appendix Figure 2 This is a structural schematic diagram of Example 2 of the present invention: the anti-bending power cable.

[0015] Appendix Figure 3 This is a schematic diagram of the conductor core in the bending-resistant power cable of this utility model.

[0016] In the above attached diagram: 1. Conductor core; 11. Conductor; 12. Insulation layer; 2. Inner sheath; 21. Tubular body; 22. Core; 23. Connecting rib; 3. Outer sheath; 4. Receiving area; 5. Reinforcing rope. Detailed Implementation

[0017] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0018] Example 1: A bending-resistant power cable includes: 3 conductor cores 1, an inner sheath 2, and an outer sheath 3. The conductor cores 1 are disposed inside the inner sheath 2. The inner sheath 2 includes a tubular body 21, a core 22 disposed at the center of the tubular body 21 and extending along the axial direction of the tubular body 21, and a plurality of connecting rib groups spaced apart along the axial direction. Each connecting rib group has 3 connecting ribs 23 spaced apart along the circumference. Each connecting rib 23 is radially connected between the inner wall of the tubular body 21 and the tubular body 21, thereby forming a receiving area 4 between any two circumferentially adjacent connecting ribs 23. Each receiving area 4 contains one conductor core 1.

[0019] At least one reinforcing rope 5 extending axially is passed through the core 22.

[0020] The aforementioned reinforcing rope 5 is a steel wire rope.

[0021] Each conductor core 1 is tangentially disposed to the inner wall of the tubular body 21 of the inner sheath 2, the outer surface of the core 22, and the connecting rib 23.

[0022] Example 2: A bending-resistant power cable, comprising: four conductor cores 1, an inner sheath 2, and an outer sheath 3. The conductor cores 1 are disposed inside the inner sheath 2. The inner sheath 2 includes a tubular body 21, a core 22 disposed at the center of the tubular body 21 and extending along the axial direction of the tubular body 21, and a plurality of connecting rib groups spaced apart along the axial direction. Each connecting rib group has four connecting ribs 23 spaced apart along the circumference. Each connecting rib 23 is radially connected between the inner wall of the tubular body 21 and the tubular body 21, thereby forming a receiving area 4 between any two circumferentially adjacent connecting ribs 23. Each receiving area 4 contains one conductor core 1.

[0023] The tubular body 21, core 22 and connecting rib 23 of the inner sheath 2 are integrally formed.

[0024] At least one reinforcing rope 5 extending axially is passed through the core 22.

[0025] The aforementioned reinforcing rope 5 is a steel wire rope, carbon fiber rope, or polyester fiber rope.

[0026] The aforementioned conductor core 1 further includes a conductor 11 formed by twisting together several conductive wires and an insulating layer 12 covering the outside of the conductor 11.

[0027] Each conductor core 1 is tangentially disposed to the inner wall of the tubular body 21 of the inner sheath 2, the outer surface of the core 22, and the connecting rib 23.

[0028] Using the aforementioned bend-resistant power cable can improve the cable's flexibility, torsion resistance, structural strength, and fracture resistance, as well as enhance the stability of the conductive core structure and position during use, thereby improving safety. Furthermore, it improves the overall tensile strength and structural strength of the cable.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A bending-resistant power cable, comprising: The inner sheath (2) comprises at least three conductor cores (1), an inner sheath (2), and an outer sheath (3), wherein the conductor cores (1) are disposed on the inner side of the inner sheath (2). The inner sheath (2) comprises a tubular body (21), a core (22) disposed at the center of the tubular body (21) and extending along the axial direction of the tubular body (21), and a plurality of connecting rib groups spaced apart along the axial direction. Each connecting rib group has at least two connecting ribs (23) spaced apart along the circumferential direction. Each connecting rib (23) is radially connected between the inner wall of the tubular body (21) and the tubular body (21), thereby forming a receiving area (4) between any two connecting ribs (23) arranged adjacently in the circumferential direction. Each receiving area (4) contains one conductor core (1).

2. The bending-resistant power cable according to claim 1, characterized in that: The tubular body (21), core (22) and connecting rib (23) of the inner sheath (2) are integrally formed.

3. The bending-resistant power cable according to claim 1 or 2, characterized in that: At least one reinforcing rope (5) extending axially is passed through the core (22).

4. The bending-resistant power cable according to claim 3, characterized in that: The reinforcing rope (5) is a steel wire rope, carbon fiber rope or polyester fiber rope.

5. The bending-resistant power cable according to claim 1, characterized in that: The conductor core (1) further includes a conductor (11) formed by twisting together a plurality of conductive wires and an insulating layer (12) covering the outside of the conductor (11).

6. The bending-resistant power cable according to claim 1, characterized in that: Each conductor core (1) is tangentially disposed to the inner wall of the tubular body (21) of the inner sheath (2), the outer surface of the core (22), and the connecting rib (23).

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