Cable with good resistance to kinking

Abstract

The utility model discloses a cable with good torsion resistance relates to the technical field of wire and cable, a cable with good torsion resistance, including the cable tube of gathering from inside to outside setting in proper order, shielding braid, twist buffer layer and outer sheath, wherein twist buffer layer includes several groups of soft rubber pad strip and ointment diaphragm, and several groups of soft rubber pad strip evenly distribute in the outer circumferential side of shielding braid, and the adjacent soft rubber pad strip is filled with insulating ointment, and ointment diaphragm is covered in the outer circumferential side of soft rubber pad strip and insulating ointment. Thus when cable occurs bending or twist, the cable tube of gathering can be realized in the free activity in the outer sheath inside through rotating or extruding soft rubber pad strip, not only can the direct action of outside environmental factor through outer sheath to the cable tube of gathering be reduced greatly, but also can slow down the bending or twist amplitude of the cable tube of gathering, is favorable to make its cable tube not easy to break, and then can make the cable be applicable to the environment of outdoor strong wind, easy twist.

Description

Technical Field

[0001] This utility model relates to the technical field of wires and cables, and in particular to a cable with good torsion resistance. Background Technology

[0002] With the rapid development of the power industry and the acceleration of urbanization, power cables have been widely used in power systems due to their advantages such as not being limited by elevation differences, easy installation, laying, and maintenance, and have basically replaced traditional overhead power lines in cities.

[0003] Because ordinary cables lack flexibility and torsion resistance, when used in windy outdoor environments, they are prone to twisting or even turning under the impact of strong winds. Significant torsional deformation can directly cause tears in the outer insulation layer or breakage of the internal conductors, affecting not only the cable's normal operation but also its lifespan and posing a significant safety hazard. Therefore, providing a cable with good torsion resistance for windy outdoor environments is of great importance. Utility Model Content

[0004] To further improve the torsion resistance of the cable and enable it to be used in outdoor environments with strong winds and high torsion resistance, this application provides a cable with good torsion resistance.

[0005] The cable with good torsion resistance provided in this application adopts the following technical solution:

[0006] A cable with good torsion resistance includes, from the inside out, a bundled cable tube, a shielding braided layer, a torsion buffer layer and an outer sheath;

[0007] The twisted buffer layer includes several sets of soft rubber pads and grease diaphragms. The several sets of soft rubber pads are evenly distributed on the outer periphery of the shielding braided layer. The space between adjacent soft rubber pads is filled with insulating grease. The grease diaphragm covers the outer periphery of the soft rubber pads and the insulating grease, forming a twisted buffer layer with a circular cross-section.

[0008] By adopting the above technical solution, when the cable is bent or twisted due to external environmental influences, the internal bundled cable tube can move freely by rotating or squeezing the soft rubber pad under the lubrication of the insulating grease. This not only greatly reduces the direct impact of external environmental factors on the bundled cable tube through the outer sheath, but also the ample space for movement can slow down the bending or twisting of the bundled cable tube, which helps protect the bundled cable tube and makes it less likely to break due to excessive bending or twisting. This improves the cable's torsion resistance and makes the cable suitable for outdoor environments with strong winds and easy twisting.

[0009] Optionally, the number of soft rubber pads provided shall not be less than 6 sets.

[0010] By adopting the above technical solution, the soft rubber pad can fully and evenly support the grease diaphragm and the outer sheath, which helps to prevent the outer sheath from denting inward under the impact of the external environment and ensures that the cable can maintain a circular cross-section structure for a long time. This helps to improve the overall stress uniformity of the cable.

[0011] Optionally, the soft rubber pad is made of closed-cell foamed rubber, and the thickness of the soft rubber pad is not less than 2mm.

[0012] By adopting the above technical solution, it is beneficial to ensure that the soft rubber pad has good compressibility and torsion resistance, while also ensuring that there is sufficient space for movement between the shielding braided layer and the grease diaphragm, and that a certain amount of insulating grease can be filled. This is beneficial for the bundled cable tube to be able to rotate freely or squeeze the soft rubber pad inside the outer sheath.

[0013] Optionally, the insulating grease may contain magnetic powder.

[0014] By adopting the above technical solution, the insulating grease containing magnetic powder can form a magnetic conductive layer in the twisted buffer layer, which can effectively shield low-frequency magnetic fields from the bundled cable tube or the external environment, which helps to reduce the impact of low-frequency magnetic fields on cable signal transmission and improve the overall electromagnetic shielding performance of the cable.

[0015] Optionally, the bundled cable tube includes several cable cores, a support core tube, and a cable tube sheath. The several cable cores are arranged in a concentric twisted manner. The support core tube is in the shape of a helical spring tube and is located at the central axis of the several cable cores. The cable tube sheath covers the outer periphery of the cable cores.

[0016] By adopting the above technical solution, the bending stress of the bundled cable tube can be absorbed by the elastic deformation of the support core tube. At the same time, the cable core is twisted concentrically around the support core tube, so the bundled cable tube can be repeatedly bent within the minimum bending radius and is not easy to break, which is beneficial to improving the flexibility and torsion resistance of the bundled cable tube.

[0017] Optionally, flame-retardant cotton yarn may be filled between the cable core and the cable tube sheath.

[0018] By adopting the above technical solutions, not only can the flame retardant performance of the bundled cable tube be improved, but the compactness of the cable core in the bundled cable tube can also be effectively improved, which is conducive to improving the overall mechanical strength and stress uniformity of the bundled cable tube.

[0019] Optionally, the shielding braided layer is formed by weaving conductive polymer fibers.

[0020] By adopting the above technical solution, the shielding braided layer can be effectively made to have high flexibility and mechanical strength, thereby ensuring that the shielding braided layer is not prone to cracks or breaks after repeated bending and twisting of the cable, which is conducive to improving the service life of the shielding braided layer.

[0021] Optionally, the braiding angle of the shielding braid is 30°-45°.

[0022] By adopting the above technical solution, it is beneficial to improve the tightness of the shielding braid layer and prevent the shielding braid layer from loosening under repeated bending and twisting.

[0023] In summary, the technical solution of this application possesses at least one of the following beneficial effects:

[0024] 1. By setting a torsion buffer layer, when the cable is bent or twisted due to the influence of the external environment, the torsion buffer layer can reduce the direct effect of external factors on the bundled cable tube through the outer sheath, slow down the bending or twisting of the bundled cable tube, and help protect the bundled cable tube so that it is not easy to break due to excessive bending or twisting.

[0025] 2. In the bundled cable tube, multiple cable cores are arranged around the support core tube in a concentric twisted manner with a helical spring-shaped support core tube as the central axis tube. The elastic deformation of the support core tube can absorb the bending stress of the bundled cable tube, enabling the bundled cable tube to bend repeatedly within the minimum bending radius and not easily break. This is beneficial to improving the flexibility and torsion resistance of the bundled cable tube.

[0026] 3. By using conductive polymer fibers to form the shielding braided layer, the high flexibility and mechanical strength of the shielding braided layer can be improved more effectively, and the shielding braided layer can be ensured that it is not prone to cracking or breaking, which is conducive to improving the service life of the shielding braided layer. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of a cable with good torsion resistance in an embodiment of this application.

[0028] Figure 2 This is a side view of a cable with good torsion resistance in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Bundled cable tube; 11. Cable core; 12. Supporting core tube; 13. Cable tube sheath; 14. Flame-retardant cotton yarn; 2. Shielding braided layer; 3. Twist buffer layer; 31. Soft rubber pad; 32. Insulating grease; 33. Grease diaphragm; 4. Outer sheath. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-2This application will be described in further detail.

[0032] This application discloses a cable with good torsion resistance. (Refer to...) Figure 1 and Figure 2 A cable with good torsion resistance includes, from the inside out, a bundled cable tube 1, a shielding braided layer 2, a torsion buffer layer 3, and an outer sheath 4. The torsion buffer layer 3 separates the bundled cable tube 1 and the outer sheath 4, providing a certain amount of space for movement between them. By incorporating the torsion buffer layer 3, when the cable is bent or tortuous due to external environmental influences, the torsion buffer layer 3 reduces the direct impact of external factors through the outer sheath 4 on the bundled cable tube 1, thus mitigating the bending or tortuosity of the bundled cable tube 1. Consequently, the bundled cable tube 1 is less likely to break due to overall cable bending or tortuosity. Combined with the highly flexible outer sheath 4, the cable as a whole exhibits high torsion resistance and is suitable for outdoor environments with strong winds and a tendency to twist.

[0033] Reference Figure 1 and Figure 2 The bundled cable tube 1 includes several sets of cable cores 11, a support core tube 12, and a cable tube sheath 13. In this embodiment, six sets of cable cores 11 are provided, which are concentrically twisted in opposite directions. The support core tube 12 is located at the central axis of the six sets of cable cores 11 and serves as the central axis tube of the bundled cable tube 1. The cable tube sheath 13 covers the outer periphery of the cable cores 11. Specifically, the support core tube 12 is in the shape of a helical spring, which allows it to absorb the bending stress of the bundled cable tube 1 through its elastic deformation. Combined with the concentric twisting of the cable cores 11 around the support core tube 12, this allows the bundled cable tube 1 to bend repeatedly within a minimum bending radius, while the cable cores 11 are less prone to breakage due to bending and twisting, thus improving the flexibility and torsion resistance of the bundled cable tube 1.

[0034] Furthermore, the bundled cable tube 1 is also filled with flame-retardant cotton yarn 14. Specifically, the flame-retardant cotton yarn 14 is filled between the cable core 11 and the cable tube sheath 13. Thus, the flame-retardant cotton yarn 14 can not only improve the flame-retardant performance of the bundled cable tube 1, but also effectively improve the compactness of the cable core 11 in the bundled cable tube 1, which is conducive to improving the overall mechanical strength and stress uniformity of the bundled cable tube 1.

[0035] Reference Figure 1 and Figure 2The shielding braided layer 2 is woven from conductive polymer fibers. The conductive polymer fibers can be selected from silver-plated nylon fibers, copper-plated polyester fibers, polythiophene fibers, polyaniline fibers, or carbon fibers. In this embodiment, silver-plated nylon fibers are specifically selected. Compared to traditional metal fibers, conductive polymer fibers have high flexibility and mechanical strength, effectively ensuring that the shielding braided layer 2 is not prone to cracking or breakage after repeated bending and twisting of the cable, thus improving the service life of the shielding braided layer 2.

[0036] Reference Figure 1 and Figure 2 To improve the tightness of the shielding braided layer 2 and prevent it from loosening under repeated bending and twisting, the shielding braided layer 2 is specifically made of conductive polymer fibers woven at a small braiding angle, which can be selected within the range of 30°-45° depending on the braiding pattern. In this embodiment, the braiding angle of the shielding braided layer 2 is 30°.

[0037] Reference Figure 1 and Figure 2 The twisting buffer layer 3 includes several sets of soft rubber pads 31 and grease diaphragms 33. The soft rubber pads 31 extend along the extension direction of the bundled cable tube 1 and are evenly distributed on the outer periphery of the shielding braided layer 2. Insulating grease 32 is applied and filled between adjacent soft rubber pads 31. The grease diaphragm 33 is wound around and covers the periphery of the soft rubber pads 31 and the insulating grease 32, thereby maintaining the circular cross-sectional structure of the cable and preventing the insulating grease 32 from affecting the subsequent outer sheath 4. Therefore, when the cable is bent or twisted due to external environmental influences, the internal bundled cable tube 1, lubricated by the insulating grease 32, can move freely by rotating or squeezing the soft rubber pads 31. This not only significantly reduces the direct impact of external environmental factors on the bundled cable tube 1 through the outer sheath 4, but also the ample space for movement slows down the bending or twisting amplitude of the bundled cable tube 1, thus protecting it from breakage due to excessive bending or twisting.

[0038] Specifically, in this embodiment, six sets of soft rubber pads 31 are provided. The six sets of soft rubber pads 31 are arranged around the periphery of the shielding braided layer 2 at 60° intervals. Thus, the soft rubber pads 31 can fully and evenly support the grease diaphragm 33 and the outer sheath 4, preventing the outer sheath 4 from denting inward under the impact of the external environment, and ensuring that the overall structure of the cable can maintain a circular cross-section for a long time.

[0039] Furthermore, to ensure that the soft rubber pad 31 has good compressibility and torsion resistance, the soft rubber pad 31 is made of closed-cell foamed rubber, specifically closed-cell foamed polyurethane rubber. Additionally, to ensure sufficient space between the shielding braided layer 2 and the grease diaphragm 33, and to allow for the filling of a certain amount of insulating grease 32, the thickness of the soft rubber pad 31 is not less than 2mm. In this embodiment, the thickness of the soft rubber pad 31 is 2mm.

[0040] Furthermore, the insulating grease 32 also contains a small amount of magnetic powder. As the insulating grease 32 is coated and filled between adjacent soft pad strips, the twisted buffer layer 3 can simultaneously form a magnetic conductive layer, thereby effectively shielding low-frequency magnetic fields from the bundled cable tube 1 or the external environment, and reducing the impact of low-frequency magnetic fields on cable signal transmission, which is beneficial to improving the overall electromagnetic shielding performance of the cable.

[0041] Reference Figure 1 and Figure 2 The outer sheath 4 is formed by extruding and coating high-toughness insulating rubber onto the outer periphery of the torsion buffer layer 3 and then curing it. Thus, when the cable is bent or twisted, the highly flexible outer sheath 4 is not easily torn, which is beneficial for the cable to have good torsion resistance when used in conjunction with the bundled cable tube 1 and the torsion buffer layer 3.

[0042] The implementation principle of a cable with good torsion resistance in this application embodiment is as follows:

[0043] When the cable is bent or twisted due to external environmental influences, the internal bundled cable tube 1 can move freely by rotating or squeezing the soft rubber pad 31 under the lubrication of the insulating grease 32. This not only greatly reduces the direct impact of external environmental factors on the bundled cable tube 1 through the outer sheath 4, but also the ample space for movement can slow down the bending or twisting of the bundled cable tube 1, which is beneficial to protecting the bundled cable tube 1 and making it less likely to break due to excessive bending or twisting.

[0044] The outer sheath 4 of the cable is formed by extrusion of high-toughness insulating rubber. When the cable is bent or twisted by external environmental factors, the outer sheath 4 is not easy to tear, which helps to ensure that the cable can work normally in strong winds and easily twisted outdoor environments.

[0045] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A cable having good resistance to kinking, characterized in that: The cable tube comprises, from inside to outside, a bundling cable tube (1), a shielding braid layer (2), a twisted buffer layer (3), and an outer sheath (4). The twisted buffer layer (3) comprises a plurality of groups of soft rubber pad strips (31) and oil paste diaphragms (33), the soft rubber pad strips (31) are uniformly distributed on the outer circumferential side of the shielding braid layer (2), the adjacent soft rubber pad strips (31) are filled with insulating oil paste (32), and the oil paste diaphragms (33) are wrapped on the outer circumferential side of the soft rubber pad strips (31) and the insulating oil paste (32).

2. The cable according to claim 1, wherein: The number of the soft rubber pad strips (31) is not less than 6 groups.

3. The cable of claim 1, wherein: The soft rubber pad strips (31) are made of closed-cell foamed rubber, and the thickness of the soft rubber pad strips (31) is not less than 2 mm.

4. The cable of claim 1, wherein: The insulating oil paste (32) is mixed with magnetic powder.

5. The cable of claim 1, wherein: The cable tube (1) comprises a plurality of cable cores (11), a supporting core tube (12), and a cable tube sheath (13), the cable cores (11) are arranged in a concentric twisted manner, the supporting core tube (12) is in the shape of a spiral spring tube, the supporting core tube (12) is arranged at the central axis of the cable cores (11), and the cable tube sheath (13) is wrapped on the outer circumferential side of the cable cores (11).

6. The cable of claim 5, wherein: The cable cores (11) and the cable tube sheath (13) are further filled with flame-retardant cotton yarn (14).

7. The cable of claim 1, wherein: The shielding braid layer (2) is formed by braiding conductive polymer fibers.

8. The cable of claim 7, wherein: The braiding angle of the shielding braid layer (2) is 30°-45°.

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