A torsion-resistant cable

Abstract

The utility model provides a kind of anti-torsion cable, including several wires, wrapping tape, inner sheath and outer sheath, the wrapping tape is wrapped in several wire outer side, the inner sheath is fixed in wrapping tape outer side, the outer sheath is fixed in inner sheath outer side, the wrapping tape is in and is covered with positioning sleeve on several wires, the inner sheath is covered with reinforcing layer, and the reinforcing layer is equipped with anti-torsion layer between outer sheath. The application has the advantages of anti-torsion, high stability and safety.

Description

Technical Field

[0001] This utility model relates to the field of cable design technology, and in particular to an anti-torsion cable. Background Technology

[0002] Wires and cables are wire products used to transmit electrical (magnetic) energy, information, and realize the conversion of electromagnetic energy. In a broad sense, wires and cables are also simply referred to as cables, while in a narrow sense, cables refer to insulated cables.

[0003] The utility model patent with publication number CN221746913U and title "A Cable" discloses a protective sheath, a power core and a tensile element disposed inside the protective sheath. The tensile element includes a first tensile element and a second tensile element. The power core includes a core body and a metal braided layer disposed around the core body. Multiple power cores are arranged adjacently around the outer periphery of the first tensile element and are in contact with the first tensile element. A second tensile element is disposed at the gap between any two adjacent power cores and the protective sheath.

[0004] In actual use, the aforementioned existing cables often need to be repeatedly dragged, twisted, and moved. The metal core wires inside the cable will also move repeatedly, which may cause displacement, deformation, or breakage of the internal core wires. This will not only result in a short service life of the overall cable, but may also seriously affect the safety of people or equipment and cause safety accidents. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an anti-torsion cable to solve the problems of shortened cable life and safety hazards caused by repeated torsion.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] An anti-torsion cable includes a plurality of conductors, a wrapping tape, an inner sheath, and an outer sheath. The wrapping tape is wrapped around the outside of the plurality of conductors. The inner sheath is fixed to the outside of the wrapping tape. The outer sheath is fixed to the outside of the inner sheath. A positioning sleeve is provided inside the wrapping tape and wrapped around the plurality of conductors. A reinforcing layer is provided on the inner sheath. An anti-torsion layer is provided between the reinforcing layer and the outer sheath.

[0008] The present invention is further configured such that the reinforcing layer is a steel strip armor.

[0009] The present invention is further configured such that: the anti-torsion layer is a reinforcing sleeve, the reinforcing sleeve is provided with a plurality of fixing blocks, the inner sidewall of the outer sheath is provided with a plurality of fixing grooves, and the fixing blocks extend into the plurality of fixing grooves one by one and engage with the corresponding fixing grooves.

[0010] The present invention is further configured such that: the fixing block is provided with an elastic protrusion, and the side wall of the fixing groove is provided with a connecting groove corresponding to the protrusion.

[0011] The present invention is further configured such that: the outer side wall of the reinforcing sleeve is provided with a plurality of uniformly distributed first protrusions with a cross-sectional shape of isosceles trapezoid, and the inner side wall of the outer sheath is provided with a plurality of uniformly distributed second protrusions with a cross-sectional shape of isosceles trapezoid; the plurality of first protrusions and the plurality of second protrusions are circumferentially alternately distributed between the reinforcing sleeve and the outer sheath; and the two sides of the first protrusion abut against the side walls of two adjacent second protrusions respectively.

[0012] The present invention is further configured such that: the wire includes a copper conductor, a conductor shielding layer, an insulating sleeve, an insulating shielding layer, and a copper strip shielding layer; the conductor shielding layer covers the copper conductor; the insulating sleeve covers the conductor shielding layer; the insulating shielding layer covers the insulating sleeve; and the copper strip shielding layer covers the insulating shielding layer.

[0013] Compared to the beneficial effects achieved by existing technologies:

[0014] This application discloses an anti-torsion cable. Positioning sleeves covering several conductors effectively constrain the relative displacement between conductors, preventing insulation damage or even breakage due to friction or compression during torsion, thus ensuring the stability of electrical transmission. A reinforcing layer covering the outer side of the inner sheath significantly enhances the cable's radial compressive and impact resistance, protecting the internal structure from external mechanical damage and providing solid support for the inner sheath, inhibiting excessive deformation or cracking under torsion. The anti-torsion layer, positioned between the reinforcing layer and the outer sheath, is structurally designed to directly target torsional stress, distributing it evenly throughout the circumference, effectively suppressing spiral deformation and interlayer slippage in the cable structure, fundamentally preventing sheath tearing or structural delamination caused by repeated torsion. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the overall structure of an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 An enlarged schematic diagram of the structure at point A.

[0017] In the above figures: 1. Wrapping tape; 2. Inner sheath; 3. Outer sheath; 4. Positioning sleeve; 5. Steel strip armor; 6. Reinforcing sleeve; 7. Fixing block; 8. Fixing groove; 9. Protrusion; 10. Connecting groove; 11. First protrusion; 12. Second protrusion; 13. Copper conductor; 14. Conductor shielding layer; 15. Insulating sleeve; 16. Insulating shielding layer; 17. Copper strip shielding layer; 18. Filler. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example:

[0020] Reference Figure 1 and Figure 2 This application discloses an anti-torsion cable, comprising three conductors, a wrapping tape 1, an inner sheath 2, and an outer sheath 3. The wrapping tape 1 is wrapped around the outside of the three conductors. A positioning sleeve 4, which is a loop structure, is provided inside the wrapping tape 1 and covers the three conductors, ensuring that the three conductors are evenly spaced and relatively fixed in position. The wrapping tape 1 also contains a filler 18 to fill the gap between the positioning sleeve 4 and the wrapping tape 1. The function of this structure is prior art and will not be elaborated upon here.

[0021] like Figure 1 and Figure 2 As shown, the conductor includes a copper conductor 13, a conductor shielding layer 14, an insulating sleeve 15, an insulating shielding layer 16, and a copper strip shielding layer 17. The conductor shielding layer 14 covers the copper conductor 13, the insulating sleeve 15 covers the conductor shielding layer 14, the insulating shielding layer 16 covers the insulating sleeve 15, and the copper strip shielding layer 17 covers the insulating shielding layer 16. The insulating sleeve 15 is an XLPE insulating sleeve, which has both chemical stability and high temperature resistance. The conductor shielding layer 14 is made of semi-conductive XLPE material and is mainly used to eliminate electric field distortion on the surface of the copper conductor 13. The insulating shielding layer 16 is also made of semi-conductive XLPE material and is mainly used to seal the electric field, realizing a continuous potential transition between the insulating sleeve 15 and the copper strip shielding layer 17.

[0022] like Figure 1 As shown, the inner sheath 2 is fixed to the outside of the wrapping tape 1, and the outer sheath 3 is fixed to the outside of the inner sheath 2. The inner sheath 2 is covered with a reinforcing layer, which is a steel strip armor 5. This can effectively provide the inner sheath 2 with high-strength radial compression and impact protection, protecting the internal conductors from external mechanical damage.

[0023] like Figure 1 and Figure 2As shown, an anti-torsion layer is provided between the reinforcing layer and the outer sheath 3. The anti-torsion layer is a reinforcing sleeve 6. The reinforcing sleeve 6 is provided with several fixing blocks 7. Several fixing grooves 8 are opened on the inner side wall of the outer sheath 3. The fixing blocks 7 extend into the fixing grooves 8 one by one and are engaged with the corresponding fixing grooves 8. The fixing blocks 7 are provided with elastic protrusions 9. The side wall of the fixing grooves 8 is provided with connecting grooves 10 corresponding to the protrusions 9. Several first protrusions 11 with an isosceles trapezoidal cross-section are provided on the outer side wall of the reinforcing sleeve 6. Several second protrusions 12 with an isosceles trapezoidal cross-section are provided on the inner side wall of the outer sheath 3. Several first protrusions 11 and several second protrusions 12 are circumferentially alternately distributed between the reinforcing sleeve 6 and the outer sheath 3. The two sides of the first protrusions 11 abut against the side walls of the two adjacent second protrusions 12 respectively. The fixing block 7 on the reinforcing sleeve 6 is inserted into the fixing groove 8 on the inner side of the outer sheath 3, and with the cooperation of the elastic protrusion 9 and the connecting groove 10, a highly efficient three-dimensional mechanical anchoring is formed; at the same time, the first protrusion 11 on the outer side of the reinforcing sleeve 6 and the second protrusion 12 on the inner side of the outer sheath 3 are interlocked, forming a three-dimensional grid-like rigid support and limit in the radial and axial directions.

[0024] Working principle:

[0025] The positioning sleeve 4, with its loop structure, simultaneously covers three conductors, forcibly maintaining the equidistant arrangement and relative positional stability of the conductors, thus suppressing relative displacement of the conductors from the internal structure. The wrapping tape 1 wraps around the positioning sleeve 4 and the outside of the conductors, forming preliminary integration and radial constraint. When the cable is subjected to torsional stress, the inner sheath 2 withstands radial pressure and impact through the outer steel tape armor layer 5, protecting the internal conductor structure from mechanical damage. The designed reinforcing sleeve 6 achieves axial anchoring through the snap-fit ​​engagement of the fixing block 7 and the fixing groove 8. At the same time, the elastic protrusion 9 is embedded in the connecting groove 10 to form a three-dimensional mechanical lock, effectively resisting axial tension and shear force. The first protrusion 11 on the outside of the reinforcing sleeve 6 and the second protrusion 12 on the inside of the outer sheath 3 interlock, forming a continuous rigid support surface in the radial direction, and restricting relative rotation in the circumferential direction through inclined interlocking. The outer sheath 3 and the reinforcing sleeve 6 form a three-dimensional grid-like limiting system through their interlocking structure, which decomposes the torsional stress into radial compressive force and axial shear force. The force is then dispersed to the entire sheath system through the mechanical transmission of the convex inclined surface, thereby significantly improving the overall torsional stiffness and deformation recovery capability of the cable.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A torsion-resistant cable, characterized in that: It includes several conductors, a wrapping tape (1), an inner sheath (2) and an outer sheath (3). The wrapping tape (1) is wrapped around the outside of several conductors. The inner sheath (2) is fixed to the outside of the wrapping tape (1). The outer sheath (3) is fixed to the outside of the inner sheath (2). A positioning sleeve (4) is provided inside the wrapping tape (1) and on several conductors. A reinforcing layer is provided on the inner sheath (2). An anti-torsion layer is provided between the reinforcing layer and the outer sheath (3).

2. The anti-torsion cable according to claim 1, characterized in that: The reinforcing layer is steel strip armor (5).

3. The anti-torsion cable according to claim 1, characterized in that: The anti-torsion layer is a reinforcing sleeve (6), and the reinforcing sleeve (6) is provided with several fixing blocks (7). The inner sidewall of the outer sheath (3) is provided with several fixing grooves (8). The fixing blocks (7) extend into the several fixing grooves (8) one by one and are engaged with the corresponding fixing grooves (8).

4. The anti-torsion cable according to claim 3, characterized in that: The fixing block (7) is provided with an elastic protrusion (9), and the side wall of the fixing groove (8) is provided with a connecting groove (10) corresponding to the protrusion (9).

5. The anti-torsion cable according to claim 3, characterized in that: The outer side wall of the reinforcing sleeve (6) is provided with a plurality of uniformly distributed first protrusions (11) with a cross-sectional shape of isosceles trapezoids, and the inner side wall of the outer sheath (3) is provided with a plurality of uniformly distributed second protrusions (12) with a cross-sectional shape of isosceles trapezoids. The plurality of first protrusions (11) and the plurality of second protrusions (12) are circumferentially alternately distributed between the reinforcing sleeve (6) and the outer sheath (3). The two sides of the first protrusions (11) respectively abut against the side walls of two adjacent second protrusions (12).

6. The anti-torsion cable according to claim 1, characterized in that: The wire includes a copper conductor (13), a conductor shielding layer (14), an insulating sleeve (15), an insulating shielding layer (16), and a copper strip shielding layer (17). The conductor shielding layer (14) covers the copper conductor (13), the insulating sleeve (15) covers the conductor shielding layer (14), the insulating shielding layer (16) covers the insulating sleeve (15), and the copper strip shielding layer (17) covers the insulating shielding layer (16).

Images