Low voltage power cable

Abstract

The application provides a low-voltage power cable, relates to the technical field of material science and engineering, and comprises a cable mechanism including two device interfaces of a conductor segmented insulation buffer layer assembly and a magnetic coupling hinge armor layer assembly; the segmented insulation buffer layer assembly and the magnetic coupling hinge armor layer assembly are arranged on opposite sides of the two device interfaces, and the segmented insulation buffer layer assembly and the magnetic coupling hinge armor layer assembly are arranged outside the conductor; the two ends of the outer wall of the conductor are connected with the two device interfaces; the segmented insulation buffer layer assembly comprises shape memory alloy, a self-repairing silica gel strip and two carbon nanotube heating wires; the shape memory alloy is made of Ti-20Al-4.75Cr material, and is used for temperature sensing and self-adaptive constraint; and the self-repairing silica gel strip is internally filled with double-component epoxy resin microcapsules. The application can realize stable transmission of electric energy in the high-frequency bending process, and can avoid conductor wire breakage and insulation cracking caused by rigid impact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material science and engineering, in particular to a low-voltage power cable. BACKGROUND

[0002] Low-voltage power cable refers to a cable with a rated voltage of 1,000 volts or below for transmitting and distributing electric energy. It is widely used in scenarios such as building interiors, industrial facilities, and urban power distribution networks, and is mainly used to connect power equipment such as distribution boxes, electric motors, and lighting equipment.

[0003] Traditional low-voltage power cables usually adopt fixed conductor stranding and continuous insulation layer structure, and the running reliability is only determined by the material strength and thickness, lacking dynamic deformation adjustment capability. The combination of the conductor and the insulation layer is a rigid hard connection without flexible buffer. After long-term high-frequency bending, the conductor breaks due to continuous friction and extrusion between the strands, resulting in gradual reduction of the conductive cross-section. In addition, in alternating high and low temperature environments, the insulation layer is more prone to fatigue cracking due to the difference in material thermal expansion and cold contraction, which may cause the risk of electric leakage. Moreover, for mobile device scenarios that require frequent bending, the lack of dynamic deformation adaptation capability of the cable leads to an increase in the damage rate of the insulation layer due to the unadjustable bending impact intensity. At the same time, due to the fixed structure size, it cannot meet the needs of different bending radius scenarios, and the conductor is often loose or the insulation layer is stuck, thereby affecting the final power supply stability and equipment safety. SUMMARY

[0004] In view of the above deficiencies of the prior art, the purpose of the embodiments of the present application is to provide a low-voltage power cable that can solve the technical problem of the prior art that in the mobile device scenario of frequent bending, the cable lacks dynamic deformation adaptation capability, which leads to an increase in the damage rate of the insulation layer due to the unadjustable bending impact intensity, and at the same time, due to the fixed structure size, it cannot meet the needs of different bending radius scenarios, and the conductor is often loose or the insulation layer is stuck, thereby affecting the final power supply stability and equipment safety.

[0005] The embodiments of the present application provide a low-voltage power cable, which comprises a cable mechanism.

[0006] The cable mechanism comprises a conductor, a segmented insulation buffer layer assembly, a magnetic coupling hinge armor layer assembly, and two device interfaces.

[0007] The segmented insulation buffer layer assembly and the magnetic coupling hinge armor layer assembly are arranged on the opposite side of the two device interfaces, and the segmented insulation buffer layer assembly and the magnetic coupling hinge armor layer assembly are arranged outside the conductor. The outer wall of the conductor is connected to the two device interfaces at both ends, and the outer surface of the conductor is coated with a polyimide lubricating film.

[0008] The segmented insulation buffer layer assembly comprises a shape memory alloy, a self-repairing silica gel strip, and two carbon nanotube heating wires, the shape memory alloy is made of Ti-20Al-4.75Cr material and is used for sensing and self-adapting constraint of temperature, the self-repairing silica gel strip is internally dispersed with double-component epoxy resin microcapsules and is used for absorbing bending stress and providing a self-repairing medium, and the two carbon nanotube heating wires are used for real-time detection of damage and precise heating.

[0009] The magnetic coupling hinge armor layer assembly comprises a permanent magnet, a soft magnetic alloy induction disc, and four aramid fiber limiting lines, the permanent magnet is used for non-contact connection, the soft magnetic alloy induction disc is used for cooperating with the permanent magnet to realize normal alignment and dynamic bending, and the four aramid fiber limiting lines are used for providing pre-tightening force and tensile strength.

[0010] Preferably, the segmented insulation buffer layer assembly further comprises an insulation unit, and the insulation unit is designed in a segmented manner, and the self-repairing silica gel strip is filled in the gap on the opposite side of every two insulation units.

[0011] Preferably, the shape memory alloy is fully wound on the outer surface of the conductor, the outer surface of the shape memory alloy is connected with the inner surface of the insulation unit, the outer surface of the insulation unit is connected with the inner surface of the permanent magnet, and the two carbon nanotube heating wires both penetrate through the self-repairing silica gel strip.

[0012] Preferably, the magnetic coupling hinge armor layer assembly further comprises an outer sheath, the inner surface of the outer sheath is connected with a nanocrystalline magnetic shielding belt, and the nanocrystalline magnetic shielding belt is used for inhibiting leakage of a magnetic field.

[0013] Preferably, the inner surface of the nanocrystalline magnetic shielding belt is connected with a flexible inner sheath, the top and bottom of the permanent magnet are integrally formed with sealing teeth, the top and bottom of the soft magnetic alloy induction disc are integrally formed with sealing teeth, and the permanent magnet and the corresponding soft magnetic alloy induction disc are connected by the top and bottom sealing teeth.

[0014] Preferably, the outer surface of the permanent magnet is integrally formed with a fixing ring, the outer surface of the fixing ring is provided with four holes, the inner surfaces of the four holes are all penetrated by aramid fiber limiting lines, and the top and bottom of the four aramid fiber limiting lines are both sleeved with limiting sleeves.

[0015] Preferably, the outer wall of each of the four limiting sleeves is fixedly connected with one end of the outer wall of a corresponding device interface.

[0016] Preferably, the inner wall bottom of each of the four sliding grooves is connected with a clamping groove, the outer surface of the soft magnetic alloy induction disc is connected with four cross plates, and the outer wall side of each of the four cross plates is welded with a connecting block.

[0017] Preferably, the top of each of the four connecting blocks is connected to a support column, the top of each of the four support columns is fixedly connected to a slider, and the four sliders are slidably connected between the inner walls of a corresponding slide.

[0018] Preferably, the bottoms of the four sliders are connected by latches, and the tops of the four sliders are elastically connected by two springs, with the tops of each pair of springs elastically connected to the top of the inner wall of a corresponding slide.

[0019] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0020] In this invention, the stress state of the cable during high-frequency bending is dynamically and adaptively adjusted by using a segmented insulation buffer layer assembly and a magnetic coupling hinge armor layer assembly. This effectively distinguishes it from the passive bearing method of traditional rigid connection structures, making the cable's operation more stable and reliable under dynamic conditions. First, the effective constraint of shape memory alloy, combined with the friction reduction effect of polyimide lubricating film, enables flexible dispersion of conductor stress during bending. Then, through the independent movement of segmented insulation units and the elastic buffer of self-healing silicone strips, combined with the crack self-healing mechanism triggered by carbon nanotube heating wires, effective dynamic insulation protection is formed. Second, the non-contact force transmission formed by permanent magnets and soft magnetic alloy induction disks, combined with the flexible constraint of aramid fiber wires, can dynamically adapt to the stress distribution and movement trajectory under different bending angles. In this way, the dynamic operating requirements of the cable caused by environmental temperature fluctuations, bending frequency differences, and load changes are precisely matched, so that it can achieve stable power transmission during high-frequency bending while avoiding conductor wire breakage and insulation cracking caused by rigid impact. Attached Figure Description

[0021] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the main structure of a low-voltage power cable provided in an embodiment of the present invention.

[0023] Figure 2 This is a cross-sectional view of a low-voltage power cable provided in an embodiment of the present invention.

[0024] Figure 3 This is a diagram showing the positional relationship between the segmented insulation buffer layer assembly and the magnetic coupling hinge armor layer assembly of a low-voltage power cable according to an embodiment of the present invention.

[0025] Figure 4 This is a three-dimensional view of a segmented insulation buffer layer assembly structure for a low-voltage power cable provided in an embodiment of the present invention.

[0026] Figure 5 yes Figure 4 Enlarged 3D view of the structure at point A in the middle.

[0027] Figure 6 This is a three-dimensional view of a magnetic coupling hinge armor layer assembly structure for a low-voltage power cable provided in an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the installation position structure of the permanent magnet, fixing ring, and soft magnetic alloy induction disk of a low-voltage power cable provided in an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the installation position structure of the support column, slider, and locking tenon of a low-voltage power cable provided in an embodiment of the present invention.

[0030] Figure 9 yes Figure 6 Enlarged 3D view of the structure at point B.

[0031] Explanation of reference numerals in the attached diagram: 1-Conductor; 2-Segmented insulating buffer layer assembly; 201-Shape memory alloy; 202-Insulating unit; 203-Self-healing silicone strip; 204-Carbon nanotube heating wire; 3-Magnetic coupling hinge armor layer assembly; 301-Outer sheath; 302-Nanocrystalline magnetic shielding strip; 303-Flexible inner sheath; 304-Permanent magnet; 305-Fixing ring; 306-Soft magnetic alloy induction disk; 307-Aramid fiber limiting line; 308-Limiting sleeve; 309-Horizontal plate; 310-Connecting block; 311-Support column; 312-Slider; 313-Clamping tenon; 314-Spring; 315-Card slot; 316-Slide rail; 4-Equipment interface. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts disclosed in this invention.

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0035] Reference manual attached Figures 1 to 9 The present invention provides a structure for a low-voltage power cable, comprising: a cable mechanism;

[0036] The cable structure includes conductor 1, segmented insulation buffer layer assembly 2, magnetic coupling hinge armor layer assembly 3, and two device interfaces 4;

[0037] The segmented insulating buffer layer assembly 2 and the magnetic coupling hinge armor layer assembly 3 are installed on opposite sides of the two device interfaces 4, and the segmented insulating buffer layer assembly 2 and the magnetic coupling hinge armor layer assembly 3 are located outside the conductor 1. The two ends of the outer wall of the conductor 1 are connected to the two device interfaces 4, and the outer surface of the conductor 1 is coated with a polyimide lubricating film.

[0038] The segmented insulating buffer layer assembly 2 includes a shape memory alloy 201, a self-healing silicone strip 203, and two carbon nanotube heating wires 204. The shape memory alloy 201 is made of Ti–20Al–4.75Cr material and is used for temperature sensing and adaptive constraint. The self-healing silicone strip 203 contains two-component epoxy resin microcapsules and is used to absorb bending stress and provide a self-healing medium. The two carbon nanotube heating wires 204 are used to detect damage in real time and heat precisely.

[0039] The magnetic coupling hinge armor layer assembly 3 includes a permanent magnet 304, a soft magnetic alloy induction disk 306, and four aramid fiber limiting lines 307. The permanent magnet 304 is used for contactless connection, the soft magnetic alloy induction disk 306 is used to cooperate with the permanent magnet 304 to achieve normal alignment and dynamic bending, and the four aramid fiber limiting lines 307 are used to provide preload and tensile strength.

[0040] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0041] In this embodiment of the invention, the segmented insulation buffer layer assembly 2 and the magnetic coupling hinge armor layer assembly 3 are used to dynamically and adaptively adjust the stress state of the cable during high-frequency bending. This effectively distinguishes it from the passive bearing method of traditional rigid connection structures, making the cable's operation more stable and reliable under dynamic conditions. Firstly, the shape memory alloy 201 effectively constrains the cable, and the polyimide lubricating film reduces friction, achieving flexible stress dispersion of the conductor 1 during bending. Then, the independent movement of the segmented insulation unit 202 and the elastic buffering of the self-healing silicone strip 203, combined with carbon... The self-healing mechanism of the crack triggered by the nanotube heating wire 204 forms an effective dynamic insulation protection. Secondly, in conjunction with the non-contact force transmission formed by the permanent magnet 304 and the soft magnetic alloy induction disk 306, combined with the flexible constraint of the aramid fiber limiting line 307, it can dynamically adapt to the stress distribution and movement trajectory under different bending angles. In this way, it can accurately match the dynamic operation requirements of the cable caused by environmental temperature fluctuations, bending frequency differences and load changes, so that it can achieve stable power transmission during high-frequency bending and avoid conductor 1 wire breakage and insulation cracking caused by rigid impact.

[0042] according to Figure 4 As shown, in one possible implementation, the segmented insulating buffer layer assembly 2 further includes an insulating unit 202, and the insulating unit 202 adopts a segmented design, with a self-healing silicone strip 203 filling the gap between each pair of insulating units 202 on opposite sides.

[0043] In this embodiment of the invention, the entire segmented insulating buffer layer assembly 2 employs segmented insulating units 202, and the gaps between adjacent insulating units 202 are filled with self-healing silicone strips 203. Firstly, this design allows each insulating unit 202 to independently undergo minute displacements during high-frequency bending, dispersing the concentrated stress of the traditional integral segmented insulating buffer layer assembly 2 to each insulating unit 202. Combined with the elastic deformation of the self-healing silicone strips 203, this prevents cracks in the insulating layer due to rigid tension. Secondly, the self-healing silicone strips 203 themselves possess excellent insulating properties, and after tightly filling the gaps, they can isolate voids. The design eliminates air, moisture, and impurities, resolving the issue of gaps easily becoming weak points in insulation and ensuring the stability of overall insulation resistance. Furthermore, when gap changes occur in insulation unit 202 due to long-term bending, the elastic restoring ability of the self-healing silicone strip 203 maintains stable gap dimensions. Its built-in two-component epoxy resin microcapsules release a repair agent upon minor damage, thus completing self-healing and reducing maintenance frequency. This design also allows segmented insulation and self-healing functions to work synergistically, meeting the mechanical adaptation requirements of dynamic cable bending while ensuring insulation reliability through continuous repair.

[0044] according to Figure 4 as well as Figure 5As shown, in one possible implementation, the shape memory alloy 201 is fully wound around the outer surface of the conductor 1, and the outer surface of the shape memory alloy 201 is connected to the inner surface of the insulating unit 202. The outer surface of the insulating unit 202 is connected to the inner surface of the permanent magnet 304, and both carbon nanotube heating wires 204 penetrate the self-healing silicone strip 203.

[0045] In this embodiment of the invention, firstly, the shape memory alloy 201 made of Ti–20Al–4.75Cr is tightly wound around the conductor 1 to ensure all-round constraint on the conductor 1. No matter how the conductor 1 slips during bending, the stress can be evenly transferred to the shape memory alloy 201 through the close contact surface. Secondly, the shape memory alloy 201 made of Ti–20Al–4.75Cr has good flexibility as it is in the martensitic phase at room temperature. In the wound state, it can freely deform with the bending of the conductor 1 without hindering the normal movement of the conductor 1 due to excessive rigidity. When the conductor 1 heats up due to overload, the shape memory alloy 201 will transform to the austenitic phase and automatically shrink to generate a stable radial tightening force. This thermally responsive reinforcement can firmly lock the conductor 1 and prevent the conductor 1 filament from loosening due to the decrease in strength at high temperature, thereby ensuring the integrity of the conductive cross section. Its connection with the insulation unit 202 disperses the local stress of the conductor 1 to the insulation unit 202, preventing conductor 1 from breaking due to stress concentration. Subsequently, the connection between the insulation unit 202 and the permanent magnet 304 allows the segmented insulation buffer layer assembly 2 and the magnetic coupling hinge armor layer assembly 3 to form a continuous force transmission path. When the magnetic coupling hinge armor layer assembly 3 is bent by external force, the force can be transmitted from the permanent magnet 304 to the insulation unit 202, the shape memory alloy 201, and finally dispersed to the conductor 1, making the entire cable structure more evenly stressed and reducing fatigue wear of local components. At the same time, the carbon nanotube heating wire 204 penetrates the self-healing silicone strip 203 to ensure full contact with the self-healing silicone strip 203. No matter where the self-healing silicone strip 203 cracks when it is bent, the carbon nanotube heating wire 204 can quickly sense the change in resistance and accurately trigger the repair mechanism.

[0046] according to Figure 6 As shown, in one possible implementation, the magnetic coupling hinge armor layer assembly 3 further includes an outer sheath 301, the inner surface of which is connected to a nanocrystalline magnetic shielding strip 302, which is used to suppress magnetic field leakage.

[0047] In this embodiment of the invention, the outer sheath 301 is used as the outermost structure to provide physical protection for the internal nanocrystalline magnetic shielding strip 302 and other components in the magnetic coupling hinge armor layer assembly 3, effectively resisting external friction, compression and other sudden situations, and preventing the nanocrystalline magnetic shielding strip 302 from failing due to mechanical damage or environmental corrosion. Secondly, the nanocrystalline magnetic shielding strip 302 itself has extremely high magnetic permeability, which can effectively adsorb and constrain the magnetic field generated by the permanent magnet 304, preventing the magnetic field from leaking out and interfering with the normal operation of the surrounding precision electronic equipment when the cable is bent at high frequency, and can ensure the stable transmission of magnetic force between the permanent magnet 304 and the soft magnetic alloy induction disk 306, making the directional bending guidance function more reliable.

[0048] according to Figure 6 As shown, in one possible implementation, the inner surface of the nanocrystalline magnetic shielding strip 302 is connected to a flexible inner sheath 303, the top and bottom of the permanent magnet 304 are integrally formed with sealing teeth, the top and bottom of the soft magnetic alloy induction disk 306 are integrally formed with sealing teeth, and the permanent magnet 304 and the corresponding soft magnetic alloy induction disk 306 are connected by the meshing of the sealing teeth at the top and bottom.

[0049] In this embodiment of the invention, firstly, the flexible inner sheath 303 can form a certain buffer effect between the nanocrystalline magnetic shielding strip 302 and the internal permanent magnet 304, avoiding the rigid edge of the nanocrystalline magnetic shielding strip 302 from causing certain wear to the permanent magnet 304. At the same time, the flexible characteristics of the flexible inner sheath 303 will not affect the bending flexibility of the cable. Secondly, the permanent magnet 304 and the sealing teeth of the soft magnetic alloy induction disk 306 are integrally formed and meshed together, which can form multiple physical barriers through the tight fit between the teeth, greatly improving the sealing performance. It can effectively block the intrusion of pollutants such as moisture and dust, and avoid the decrease in magnetic field transmission efficiency due to the adhesion of impurities.

[0050] according to Figure 7 as well as Figure 9 As shown, in one possible implementation, a fixing ring 305 is integrally formed on the outer surface of the permanent magnet 304. The outer surface of the fixing ring 305 has four holes, and aramid fiber limiting lines 307 pass through the inner surfaces of the four holes. Limiting sleeves 308 are fitted on the top and bottom of the four aramid fiber limiting lines 307.

[0051] In this embodiment of the invention, firstly, the fixing ring 305 and the permanent magnet 304 are integrally formed, which can significantly improve the connection strength between the fixing ring 305 and the permanent magnet 304, avoiding the loosening and falling off of the traditional split fixing structure due to long-term bending and vibration, and ensuring the stability and reliability of the fixing foundation of the aramid fiber limiting line 307. Secondly, the four holes are evenly distributed on the fixing ring 305, allowing the four aramid fiber limiting lines 307 to pass through symmetrically, so that each aramid fiber limiting line 307 is subjected to balanced force, avoiding the situation where an aramid fiber limiting line 307 is overloaded and broken due to uneven distribution, and ensuring more precise constraint on the bending angle. By using the limiting sleeve 308 to fit on both ends of the limiting line, the position of the fixing line can be tightly wrapped to prevent slippage between the line and the hole due to friction after long-term use, maintaining the stability of the preload of the aramid fiber limiting line 307, avoiding the limiting failure due to insufficient preload, and significantly improving the safety and durability of the cable under dynamic bending conditions.

[0052] according to Figure 7 as well as Figure 9 As shown, in one possible implementation, each of the four limiting sleeves 308 is fixedly connected to one end of the outer wall of a corresponding device interface 4, and the outer surface of the permanent magnet 304 is provided with four slides 316.

[0053] In this embodiment of the invention, firstly, the limiting sleeve 308 is fixedly connected to the device interface 4, which can constrain the end of the aramid fiber limiting line 307 to form a rigid whole with the device interface 4, preventing the limiting sleeve 308 from loosening or displacement due to cable bending. This ensures that the pre-tightening force of the aramid fiber limiting line 307 forms a continuous and stable transmission path from the device interface 4 to the permanent magnet 304, making the constraint of the bending angle more precise. Secondly, the four slides 316 are symmetrically distributed on the outer surface of the permanent magnet 304, which can provide a reliable sliding path for the latch 313, effectively suppressing excessive bending of the cable during use and avoiding damage such as breakage of the conductor 1.

[0054] according to Figure 8 As shown, in one possible implementation, the bottom of the inner walls of the four slides 316 are connected to slots 315, and the outer surface of the soft magnetic alloy induction disk 306 is connected to four horizontal plates 309. A connecting block 310 is welded to one side of the outer wall of each of the four horizontal plates 309.

[0055] In this embodiment of the invention, the groove inside the slot 315 and the tenon 313 at the bottom of the slider 312 fully cooperate. When the bending angle of the cable during use is about to exceed the limit angle, the full cooperation between the slot 315 and the tenon 313 can effectively suppress the excessive bending of the cable during use.

[0056] according to Figure 8As shown, in one possible implementation, the tops of the four connecting blocks 310 are all connected to support columns 311, the tops of the four support columns 311 are all fixedly connected to sliders 312, and the four sliders 312 are slidably connected between the inner walls of a corresponding slide rail 316.

[0057] In this embodiment of the invention, the support column 311 firstly forms a rigid support structure with the connecting block 310 and the slider 312, preventing the slider 312 from tilting or falling off due to bending vibration, ensuring that the slider 312 is always tightly fitted to the inner wall of the slide 316, and that no jamming occurs during sliding. Under normal circumstances, the slider 312 will be tightly fitted to the top of the slide 316, at which time the tenon 313 will not lock with the slot 315. When the cable bends, the slider 312 slides smoothly along the slide 316, and the slot 315 can accurately trigger the limit when approaching the limit angle, avoiding limit failure due to movement deviation. At the same time, the height design of the support column 311 ensures that the slider 312 and the bottom of the slide 316 maintain an appropriate gap, without affecting the cooperation between the slot 315 and the tenon 313, making the mechanical limit more reliable.

[0058] according to Figure 8 As shown, in one possible implementation, the bottoms of the four sliders 312 are connected to latches 313, and the tops of the four sliders 312 are elastically connected to two springs 314. The tops of each pair of springs 314 are elastically connected to the top of the inner wall of a corresponding slide rail 316.

[0059] In this embodiment of the invention, firstly, the latch 313 can be precisely engaged when the slider 312 slides along the slide 316 to the slot 315, thereby forming an effective mechanical locking state. Compared with simple rigid limiting, this cooperation makes the control of the extreme bending angle more precise. Secondly, the elastic connection of the spring 314 can provide a certain restoring force during the sliding process when the slider 312 is in the contact locking state, which can drive the slider 312 to automatically return to its original position, so that the latch 313 disengages from the slot 315, and the flexible bending of the cable can be restored without additional operation.

[0060] During use, when the cable is subjected to high-frequency bending under external force, the permanent magnet 304 in the magnetic coupling hinge armor layer assembly 3 and the soft magnetic alloy induction disk 306 form a contactless connection through magnetic field force and guide directional rotation. At this time, the horizontal plate 309 on the outer surface of the soft magnetic alloy induction disk 306 drives the connecting block 310, support column 311 and slider 312 to slide along the slide rail 316 on the outer surface of the permanent magnet 304. Among them, the four aramid fiber limiting lines 307 form a flexible constraint through the holes of the fixing ring 305 and the limiting sleeve 308. The latch 313 at the bottom of the sliding block 312 and the groove 315 on the inner wall of the slide rail 316 achieve mechanical locking when the bending angle approaches its limit. Then, the aramid fiber limiting line 307 further restricts the maximum angle. Simultaneously, the segmented insulation unit 202 in the segmented insulation buffer layer assembly 2 undergoes independent slight displacement during bending. The self-healing silicone strip 203 in the gap between adjacent insulation units 202 absorbs surface stress through elastic deformation. If a crack appears in the self-healing silicone strip 203, the carbon nanotubes penetrating it will... The heating wire 204 experiences a sudden change in resistance due to localized stretching, triggering the micro-control system to energize and heat the carbon nanotube heating wire 204 within a short period. This causes the two-component epoxy resin microcapsules within the self-healing silicone strip 203 to rupture and cure for repair. Simultaneously, the Ti–20Al–4.75Cr shape memory alloy 201 wound around the outer surface of conductor 1, exhibits a martensitic phase at room temperature and freely deforms with the bending of conductor 1. Combined with the polyimide lubricating film covering conductor 1, this reduces the friction between the copper wire strands. When conductor 1 heats up due to overload, the shape memory alloy 201... The phase transformation to austenitic phase and contraction generate radial constraint force to prevent the loosening of the single filament of conductor 1. The outer sheath 301 and the nanocrystalline magnetic shielding tape 302 provide physical protection and magnetic field shielding respectively, avoiding magnetic field leakage that could interfere with surrounding equipment and prevent internal magnetic field transmission failure. Throughout the process, the sealing teeth of the flexible inner sheath 303, permanent magnet 304, and soft magnetic alloy induction disk 306 provide effective protection for the cable, realizing full-process coordination from external force bearing, directional guidance, angle limiting to damage self-repair, ensuring the stable operation of the cable under high-frequency bending.

[0061] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention.

Claims

1. A low-voltage power cable, characterized in that, include: Cable mechanism; The cable mechanism includes a conductor, a segmented insulation buffer layer assembly, a magnetic coupling hinge armor layer assembly, and two device interfaces; The segmented insulating buffer layer assembly and the magnetic coupling hinge armor layer assembly are installed on opposite sides of the two device interfaces, and the segmented insulating buffer layer assembly and the magnetic coupling hinge armor layer assembly are located outside the conductor. The two ends of the outer wall of the conductor are connected to the two device interfaces, and the outer surface of the conductor is coated with a polyimide lubricating film. The segmented insulating buffer layer assembly includes a shape memory alloy, a self-healing silicone strip, and two carbon nanotube heating wires. The shape memory alloy is used for temperature sensing and adaptive constraint. The self-healing silicone strip contains two-component epoxy resin microcapsules and is used to absorb bending stress and provide a self-healing medium. The two carbon nanotube heating wires are used to detect damage in real time and heat precisely. The shape memory alloy is fully wound around the outer surface of the conductor, and the outer surface of the shape memory alloy is connected to the inner surface of the insulating unit. The outer surface of the insulating unit is connected to the inner surface of the permanent magnet. Both of the carbon nanotube heating wires pass through the self-healing silicone strip. The magnetic coupling hinge armor layer assembly also includes an outer sheath, the inner surface of which is connected to a nanocrystalline magnetic shielding strip, which is used to suppress magnetic field leakage. The magnetic coupling hinge armor layer assembly includes a permanent magnet, a soft magnetic alloy induction disk, and four aramid fiber limiting lines. The permanent magnet is used for contactless connection. The soft magnetic alloy induction disk is used to cooperate with the permanent magnet to achieve normal alignment and dynamic bending. The four aramid fiber limiting lines are used to provide preload and tensile strength. The inner surface of the nanocrystalline magnetic shielding strip is connected to a flexible inner sheath. The top and bottom of the permanent magnet are integrally formed with sealing teeth. The top and bottom of the soft magnetic alloy induction disk are integrally formed with sealing teeth. The permanent magnet and the corresponding soft magnetic alloy induction disk are connected by meshing of the sealing teeth at the top and bottom. The outer surface of the permanent magnet is integrally formed with a fixing ring, and the outer surface of the fixing ring has four holes. Aramid fiber limiting lines pass through the inner surfaces of the four holes, and limiting sleeves are fitted at the top and bottom of the four aramid fiber limiting lines.

2. The low-voltage power cable according to claim 1, characterized in that, The segmented insulating buffer layer assembly also includes insulating units, and the insulating units adopt a segmented design, with the self-healing silicone strip filling the gap between each pair of insulating units on opposite sides.

3. The low-voltage power cable according to claim 1, characterized in that, Each of the four limiting sleeves is fixedly connected to one end of the outer wall of a corresponding device interface, and the outer surface of the permanent magnet is provided with four slide tracks.

4. The low-voltage power cable according to claim 3, characterized in that, The bottom of the inner walls of the four slides are connected with slots, and the outer surface of the soft magnetic alloy induction disk is connected with four horizontal plates. A connecting block is welded to one side of the outer wall of each of the four horizontal plates.

5. The low-voltage power cable according to claim 4, characterized in that, Each of the four connecting blocks has a support column at its top, and each of the four support columns has a slider fixedly connected to its top. The four sliders are slidably connected between the inner walls of a corresponding slide rail.

6. The low-voltage power cable according to claim 5, characterized in that, The bottoms of the four sliders are connected by latches, and the tops of the four sliders are elastically connected by two springs. The tops of each pair of springs are elastically connected to the top of the inner wall of a corresponding slide.

Images