Aluminum alloy low voltage cable for photovoltaics

Abstract

The application discloses a kind of photovoltaic aluminium alloy low-voltage cables, it is related to cable technical field, including rib, a plurality of partition plates are fixed on the rib, two adjacent partition plates form a placement space, each placement space is provided with a cable core, two swing plates are provided on each partition plate side, two swing plates in the same placement space and corresponding partition plate jointly form a containing cavity, a plurality of partition plates are provided with a placing piece away from rib side, the placing piece is provided with a plurality of extrusion air bags corresponding to cable core, inert gas is filled in the extrusion air bag.The application drives swing plate to move inwards by extrusion air bag, so that cable core moves inwards and is wrapped, so as to reach when photovoltaic cable is twisted, extruded and bent, the influence that cable core can be affected minimally, solve the technical problem that the existing photovoltaic cable is poor in torsion resistance, compression resistance and bending resistance.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a photovoltaic aluminum alloy low-voltage cable. Background Technology

[0002] During long-term outdoor operation, solar-tracking photovoltaic cables undergo frequent reciprocating twisting, multi-angle bending, and periodic compression along with the tracking brackets. They are also subjected to external forces such as wind and sand accumulation, bracket swaying, and contact with foreign objects. Traditional photovoltaic cables lack targeted dynamic protection structures. During twisting, the cable core is prone to axial misalignment, relative friction, and insulation wear. During compression, the concentrated external force on the cable core easily causes deformation and insulation damage. During bending, the cable core is easily subjected to excessive bending angles, excessive stretching, or compression, ultimately leading to a decline in the overall mechanical properties of the cable and a shortened service life, failing to meet the requirements for long-term, stable, and continuous operation of solar-tracking systems.

[0003] During dynamic movements such as twisting, compression, and bending, the cable cores of solar-powered cables tend to move inwards towards the cable center, reducing the spacing between them. This significantly enhances electromagnetic interference between the cores, leading to decreased signal and power transmission stability. Traditional cables employ a fixed shielding structure, which cannot adaptively adjust its shielding effectiveness according to changes in the core position. As the cores approach each other and interference intensifies, the shielding capability cannot improve synchronously. Furthermore, external forces can cause a decrease in the fit between the shielding layer and the core, leading to partial detachment, shielding attenuation, or even shielding failure. Ultimately, this results in increased power transmission loss, reduced system power generation efficiency, and difficulty meeting the anti-interference requirements of low-voltage photovoltaic transmission.

[0004] Solar-powered cables are constantly exposed to strong sunlight and high temperatures outdoors. The Joule heat generated by the cable core during operation, combined with the heat from the external environment, causes the internal temperature of the cable to rise rapidly. Especially in areas with frequent twisting and bending, the internal structure of the cable is compressed, the heat dissipation channels are blocked, and the heat dissipation capacity is significantly reduced. Heat cannot be dissipated in time, and local heat accumulation is very likely to occur. Traditional cable heat dissipation methods are singular and have low heat dissipation efficiency, which cannot meet the heat dissipation requirements under dynamic operating conditions. High temperatures will accelerate the aging of the insulation layer, degrade the shielding performance, and reduce the conductivity of the cable core. In severe cases, it can cause thermal breakdown of the insulation, affecting the operational safety and service life of the photovoltaic system. Summary of the Invention

[0005] The purpose of this invention is to provide a low-voltage aluminum alloy cable for photovoltaic applications, in order to solve the technical problems mentioned in the background art, such as the cable core being easily damaged, the shielding failing as the cable core approaches, poor heat dissipation and heat accumulation at the bending and twisting parts, and the inability to adapt to the long-term stable operation of the solar tracking system under the dynamic working conditions of frequent twisting, compression and bending outdoors.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic aluminum alloy low-voltage cable, comprising ribs, multiple partition plates fixed on the ribs, a placement space formed between two adjacent partition plates, a cable core disposed in each placement space, two swing plates disposed on both sides of each partition plate, interlocking grooves formed on the two swing plates in the same placement space, the two swing plates in the same placement space and the corresponding partition plates forming a receiving cavity, the cable core being located in the corresponding receiving cavity, a placement member disposed on the side of the multiple partition plates away from the ribs, the placement member being disposed on multiple compression air bladders corresponding to the cable core, the compression air bladders being filled with inert gas;

[0007] When the cable is subjected to external bending or compressive forces, the compression airbag is compressed and drives the swing plate to swing inward, so that the two swing plates close together through the interlaced grooves, forming a protective wrap around the cable core.

[0008] Preferably, a buffer airbag is provided on the side of the placement space near the rib, and multiple pressure stabilizing grooves are provided in the rib along its extension direction. The buffer airbag is connected to the pressure stabilizing groove through a connecting groove, and multiple telescopic components are provided on the side of each compression airbag near the cable core.

[0009] Preferably, the buffer airbag, the telescopic component, and the pressure stabilizing groove are also filled with inert gas, and each of the telescopic components is fixedly provided with a squeezing component on the side near the cable core, and each squeezing component can contact the side of the corresponding swing plate away from the cable core.

[0010] Preferably, when the compression airbag is compressed, the compression airbag discharges inert gas into the telescopic member through the ventilation groove. The telescopic member extends and pushes the compression member to squeeze the two corresponding swing plates to swing inward. The interlocking grooves of the two swing plates mesh with each other and push the cable core to move in the direction of the rib, thereby increasing the coverage area of ​​the cable core and reducing interference between multiple cable cores.

[0011] Preferably, the extrusion member is arc-shaped, and the interlaced grooves are serrated, which can mesh with each other to form a closed space when closed.

[0012] Preferably, each of the partition plates has multiple through holes on its side. The placement space is filled with a flowable heat dissipation material. When the cable is subjected to a torsional force or the swing plate is closed, the closed swing plate clamps and fixes the cable core and twists synchronously with the external force to prevent the cable core from axially misaligning. The swing plate drives the heat dissipation material to flow and realizes the position exchange of the heat dissipation material through the through holes.

[0013] Preferably, each of the placement components has multiple placement slots corresponding to the compression airbags, each compression airbag is fixed in the corresponding placement slot, and the end of each telescopic component facing the cable core passes through the corresponding placement slot and is fixedly connected to the compression component.

[0014] Preferably, each of the partition plates is provided with a connector, and each connector is fixedly connected to the corresponding swing plate. The connector is made of a flexible and bendable material, and the swing plate is made of elastic stainless steel with a rust-proof surface treatment to ensure long-term stability.

[0015] Preferably, each of the cable cores has an insulation layer on its outer side wall, and each insulation layer has a shielding layer on its outer side wall.

[0016] Preferably, the placement component is provided with an inner protective layer, the outer wall of the inner protective layer is provided with a water-blocking layer, the outer wall of the water-blocking layer is provided with an armor layer, and multiple partitions are fixedly provided on the multiple partition plates in their extension direction, with corresponding two partitions forming a receiving space. The swing plate, the compression airbag, the placement component, the heat dissipation material, the buffer airbag, the pressure stabilizing groove, the compression component, and the connecting component are all arranged in the corresponding receiving space.

[0017] The beneficial effects of this invention are:

[0018] 1. This invention utilizes a multi-stage buffer structure consisting of an orderly inward movement of the cable core, a graded oscillation of the oscillating plate, and interlocking slots for limiting movement. Combined with a compression airbag, a buffer airbag, and a voltage-stabilizing groove, this structure effectively disperses stress and prevents concentrated force on the cable core under various dynamic external forces such as torsion, compression, and bending. This significantly improves the cable's resistance to torsion, compression, and bending. During torsion, it prevents axial misalignment and relative friction of the cable core; during compression, it combines flexible buffering with rigid support to prevent cable core deformation; and during bending, it guides the cable core away from the inner and outer bend angles, preventing excessive bending that could cause insulation cracking and cable core damage. This allows the cable to adapt to the dynamic operating conditions of a solar tracking system for extended periods, significantly improving structural stability and service life.

[0019] 2. This invention forms a dynamic, collaborative shielding structure with the swing plate and the cable core shielding layer, which can adaptively improve the shielding capability according to the movement state of the cable core. When the cable core moves inward under external force, the spacing decreases, and electromagnetic interference increases, the swing plate closes synchronously. The shielding area of ​​the cable core increases synchronously with the proximity of the cable core, forming a more tightly fitted and comprehensive dual shielding system with the shielding layer, effectively suppressing internal electromagnetic interference between cable cores and external electromagnetic interference. At the same time, the clamping action of the swing plate ensures that the shielding layer is always tightly fitted to the cable core, avoiding shielding failure caused by loosening or detachment of the shielding layer. This ensures that the cable maintains a stable and efficient shielding effect under all operating conditions, reduces power transmission loss, and improves the power generation stability of the solar tracking photovoltaic system.

[0020] 3. This invention employs a flowable heat dissipation material combined with a perforated partition plate structure, enabling rapid absorption, transfer, and dissipation of the working heat of the cable core and the combined heat from the external environment. Under dynamic conditions such as torsion and bending, the movement of the oscillating plate actively drives the circulation of the heat dissipation material, opening up obstructed heat dissipation channels and significantly improving the heat dissipation efficiency at torsion and bending points, fundamentally solving the problems of localized heat accumulation and reduced heat dissipation capacity. The overall heat dissipation system keeps the internal temperature of the cable within a reasonable range, effectively delaying insulation aging, maintaining stable shielding performance, protecting the conductivity of the cable core, avoiding insulation failure and safety hazards caused by high temperatures, and further improving the long-term reliability of the cable under combined outdoor conditions of strong light, high temperature, and dynamic movement. Attached Figure Description

[0021] Figure 1 This is a full sectional front view of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure after removing the outer protective layer and part of the compression airbag in this invention.

[0023] Figure 3 This is a schematic diagram of the distribution structure of the partition plate, placement component, and extrusion component in this invention.

[0024] Figure 4 This is a schematic diagram of the planar structure of the swing plate after it swings in this invention.

[0025] Figure 5 This is a cross-sectional view of the connecting plane between the buffer airbag and the stabilizing groove in this invention.

[0026] Figure 6 This is a schematic diagram of the structure of the compression airbag and the telescopic component in this invention.

[0027] Figure 7 This is a schematic diagram of the structure of the placement component and the placement groove in this invention.

[0028] Figure 8 This is a schematic diagram of the structure of the ribs and separators in this invention.

[0029] Figure 9 This is a schematic diagram of the structure of the swing plate and the staggered groove in this invention.

[0030] The attached diagram is labeled as follows: 1. Rib; 2. Separator; 3. Placement space; 4. Cable core; 5. Swing plate; 6. Cross groove; 7. Compression airbag; 9. Placement component; 11. Heat dissipation material; 12. Through hole; 13. Buffer airbag; 14. Voltage stabilizing groove; 15. Connecting groove; 16. Telescopic component; 17. Compression component; 18. Inert gas; 20. Connector; 21. Separator; 801. Insulation layer; 802. Shielding layer; 901. Placement groove; 903. Inner sheath; 904. Water-blocking layer; 905. Armor layer. Detailed Implementation

[0031] The technical solutions of the embodiments 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, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Solar tracking cables need to undergo frequent torsion, compression, and bending movements along with the solar tracking system, and are exposed to complex outdoor environments for extended periods. Traditional solar tracking cables have significant technical deficiencies in terms of torsion resistance, compression resistance, and bending resistance, making them unsuitable for the long-term stable operation requirements of the system. Specific problems are as follows:

[0034] When the cable reciprocates and twists with the sun-tracking system, the cable core 4 is prone to axial misalignment and relative friction with surrounding components, leading to wear and cracking of the insulation layer 801. Furthermore, the lack of effective limiting and buffering mechanisms means that the torsional force is concentrated on the cable core 4, easily causing deformation or even breakage, thus affecting the cable's service life. In outdoor environments, the cable is susceptible to pressure from wind and sand accumulation, and contact with maintenance tools. This pressure is concentrated on the cable core 4, causing deformation. Traditional cables lack a graded buffering structure, failing to disperse external forces, easily leading to damage to the insulation layer 801 and causing power transmission failures. When the sun-tracking system swings, the cable undergoes frequent bends, with the cable core 4 easily positioned at the inner or outer angle of the bend, subjected to excessive stretching or compression, resulting in cracking of the insulation layer 801 and breakage of the cable core 4. The lack of an effective protective structure to guide the orderly movement of the cable core 4 further exacerbates cable damage. Traditional cables lack a coordinated linkage mechanism, failing to achieve synchronous protection under different external forces, resulting in poor overall protection and making them unsuitable for the frequent dynamic movement conditions of the sun-tracking system.

[0035] To resolve the above technical issues, please refer to Figures 1 to 9As shown, an embodiment of the present invention provides a photovoltaic aluminum alloy low-voltage cable, including a rib 1, with multiple partition plates 2 fixed on the rib 1. Adjacent partition plates 2 form a placement space 3, and each placement space 3 contains a cable core 4. Two swing plates 5 are arranged on both sides of each partition plate 2. Interlocking grooves 6 are respectively formed on the two swing plates 5 within the same placement space 3. The two swing plates 5 within the same placement space 3 and the corresponding partition plates 2 together form a receiving cavity, in which the cable core 4 is located. A placement member 9 is provided on the side of the multiple partition plates 2 away from the rib 1. Multiple compression airbags 7 corresponding to the cable core 4 are provided on the placement member 9, and the compression airbags 7 are filled with inert gas 18. When... When the cable is subjected to external bending or compressive forces, the compression airbag 7 is compressed and drives the swing plate 5 to swing inward, causing the two swing plates 5 to close together through the staggered grooves 6, forming a protective enclosure for the cable core 4. A buffer airbag 13 is provided on the side of the placement space 3 near the rib 1. Multiple voltage stabilizing grooves 14 are provided in the rib 1 along its extension direction. The buffer airbag 13 is connected to the voltage stabilizing grooves 14 through the connecting grooves 15. Multiple telescopic components 16 are provided on the side of each compression airbag 7 near the cable core 4. The buffer airbag 13, telescopic components 16 and voltage stabilizing grooves 14 are also filled with inert gas 18. Each telescopic component 16 is fixedly provided with a compression component 17 on the side near the cable core 4. Each compression component 17 can contact the side of the corresponding swing plate 5 away from the cable core 4. The extrusion member 17 is arc-shaped, and the interlacing grooves 6 are serrated. When closed, they can mesh with each other to form a closed space. Each placement member 9 has multiple placement grooves 901 corresponding to the extrusion airbags 7. Each extrusion airbag 7 is fixed in its corresponding placement groove 901. The end of each telescopic member 16 facing the cable core 4 passes through the corresponding placement groove 901 and is fixedly connected to the extrusion member 17. When the extrusion airbag 7 is compressed, it discharges inert gas 18 into the telescopic member 16 through the venting groove. The telescopic member 16 extends and pushes the extrusion member 17 to compress the two corresponding swing plates 5, causing them to swing inward. The interlacing grooves 6 of the two swing plates 5 mesh with each other. Each partition plate 2 is provided with a connector 20, and each connector 20 is fixedly connected to the corresponding swing plate 5. The connector 20 is made of a flexible and bendable material, the swing plate 5 is made of elastic stainless steel and the surface is treated with anti-rust to ensure long-term stability. Each cable core 4 has an insulation layer 801 on its outer wall, and each insulation layer 801 has a shielding layer 802 on its outer wall. The placement piece 9 has an inner protective layer 903 on its outer wall, a water-blocking layer 904 on its outer wall, and an armor layer 905 on its outer wall. Multiple partition plates 2 are fixed with multiple partitions 21 in their extension direction. The space between two partitions 21 forms a receiving space. The swing plate 5, the compression airbag 7, the placement piece 9, the heat dissipation material 11, the buffer airbag 13, the voltage stabilizing groove 14, the compression piece 17, and the connector 20 are all placed in the corresponding receiving spaces.

[0036] When all components are in a stable state, the inert gas 18 maintains a stable pressure in the compression airbag 7, buffer airbag 13, pressure stabilizing groove 14, and telescopic component 16; the swing plate 5 is connected to the partition plate 2 through the connector 20, the connector 20 is fixedly connected to the partition plate 2, and the swing plate 5 is fixedly connected to the connector 20. The connector 20 is made of elastic, flexural, and wear-resistant material, which can adapt to the current working scene and is in a slightly open state. The staggered grooves 6 of the two swing plates 5 in the same placement space 3 are initially engaged. The cable core 4 is located at the center of the placement space 3, and maintains a slight gap with the swing plate 5 and the partition plate 2 to reserve space for force movement. The cable core 4 is fixedly connected to the buffer airbag 13; the inner sheath 903, water-blocking layer 904, and armor layer 905 are in a stable state and play a basic protective role; the insulation layer 801 tightly wraps the cable core 4 to ensure stable insulation performance.

[0037] When the cable is subjected to compressive force, the compressive force is transmitted sequentially to the armor layer 905, the water-blocking layer 904, and the inner sheath 903, and finally acts on the compression airbag 7 of the placement component 9. The compression airbag 7 is compressed and releases some inert gas 18 into the telescopic component 16, which initially buffers the impact of the compressive force. The telescopic component 16 extends and pushes the compression component 17 to move towards the rib 1. The compression component 17 pushes the cable core 4 to move inward toward the center of the cable through the swing plate 5. The buffer airbag 13 is compressed, and the inert gas 18 in the buffer airbag 13 is discharged into the pressure stabilizing groove 14 through the connecting groove 15 to achieve pressure balance, further buffering the external force and preventing the cable core 4 from directly bearing the compressive force.

[0038] As the external extrusion force continues to act, the telescopic member 16 continues to extend after receiving the inert gas 18, pushing the extrusion member 17 to further extrude the swing plate 5. The swing plate 5 swings towards the rib 1, and the interlocking grooves 6 of the two swing plates 5 in the same placement space 3 become more deeply engaged. The cable core 4 is initially clamped and positioned by the swing plate 5 to prevent the cable core 4 from being misaligned or colliding, while keeping it in the center area of ​​the cable to prevent the extrusion force from being concentrated on the cable core 4. The separator 21 works in conjunction with the separator 2 to improve the overall structural rigidity and help disperse the extrusion force.

[0039] When the external compressive force reaches its maximum, the cable core 4 moves to its limit position and is completely in the center area of ​​the cable; the swing plate 5 swings to its limit position, the interlocking groove 6 fully engages and the two corresponding swing plates 5 squeeze each other, engaging to the limit position, tightly wrapping and fixing the cable core 4, forming a closed clamping structure; the swing plate 5 works together with the partition plate 2, rib 1, and partition 21 to form a rigid support, evenly distributing the concentrated compressive force to the entire cable structure, avoiding deformation of the cable core 4 and damage to the insulation layer 801 caused by stress concentration, maintaining pressure balance, continuously playing a buffering role, and ensuring the stable operation of each component.

[0040] When the cable is subjected to bending force, the bending force causes the cable to form inner and outer angles, and the bending stress is concentrated at the inner and outer angles. Under the action of bending stress, the cable core 4 moves towards the rib 1, away from the inner and outer angles of the bend, to avoid excessive stretching or compression. At this time, the buffer airbag 13 is compressed and contracted by the cable core 4, and the inert gas 18 in the buffer airbag 13 is discharged into the pressure stabilizing groove 14 through the connecting groove 15. At the same time, the pressure stabilizing groove 14 is connected to other buffer airbags 13 through the connecting groove 15 on it, so that the compression force of each cable core 4 is the same, and the individual cable core 4 is prevented from being damaged by excessive compression. Each pressure stabilizing groove 14 on the rib 1 and the corresponding buffer airbag 13 are provided with corresponding connecting grooves 15 for exchanging inert gas 18 and buffering the impact of bending stress.

[0041] When the airbag 7 is bent, it contracts under lateral compressive force, which pushes the telescopic component 16 to extend. The telescopic component 16 is a telescopic airbag that can only extend and retract in the length direction and will not twist. A pneumatic telescopic cylinder can also be used instead, as long as it can achieve this function. The telescopic component 16 pushes the swing plate 5 to swing slightly inward through the extrusion component 17 and makes the swing plate 5 clamp the cable core 4.

[0042] As the bending force continues to act, the telescopic component 16 continues to extend, pushing the swing plate 5 to swing inward. The interlocking groove 6 continues to deepen the engagement, and the cable core 4 is stably clamped and positioned to avoid displacement and friction during bending. The swing plate 5 and the separator plate 2 work together to disperse the bending stress and prevent stress concentration on the cable core 4 and the insulation layer 801. The separator 21 improves the overall structural rigidity, prevents the cable from being bent excessively, and reduces damage to the bending part.

[0043] When the bending reaches its maximum angle, the cable core 4 is completely away from the inner and outer angles of the bend and is located in the center area of ​​the cable. The swing plate 5 swings to its limit position, the interlocking groove 6 is fully engaged, and the swing plate 5 is squeezed and can no longer swing. At this time, the swing plate 5 tightly wraps the cable core 4, forming a rigid clamping structure. At this time, the gas in the compression airbag 7 is gradually compressed, so that the compression airbag 7 has a certain rigidity to resist the bending force. The swing plate 5, the separator plate 2, the rib 1 and the separator 21 work together to limit the cable from excessive bending, and evenly distribute the concentrated bending stress to the entire cable structure, so as to avoid the insulation layer 801 from cracking and the cable core 4 from breaking, and ensure that the cable can still operate stably under the extreme bending state.

[0044] When the tracking system drives the cable to twist, the torsional force is transmitted sequentially to the armor layer 905, the water-blocking layer 904, and the inner sheath 903, causing the placement component 9 and the separator 21 to twist synchronously. The separator 21 causes the separator plate 2 to twist slightly around the extension direction of the rib 1. The separator plate 2 drives the swing plate 5 to twist synchronously through the connector 20. Under the action of the torsional force, the cable core 4 moves towards the rib 1, pushing the buffer airbag 13 to contract. The inert gas 18 in the pressure stabilizing groove 14 flows through the connecting groove 15 to achieve pressure balance, assist in buffering the torsional impact force, and prevent the cable core 4 from shaking violently due to torsion and rubbing against surrounding components.

[0045] As the torsional force continues to increase, the compression airbag 7 is continuously compressed, and the inert gas 18 inside it is discharged into the telescopic member 16, causing the telescopic member 16 to push the compression member 17 to squeeze the swing plate 5, thereby protecting the cable core 4. The torsional angle of the swing plate 5 gradually increases, and at the same time, it swings further inward around the cable core 4. The staggered grooves 6 on the two corresponding swing plates 5 mesh, generating a slight clamping force on the cable core 4. Under the action of the clamping force, the cable core 4 twists synchronously with the swing plate 5 and the partition plate 2, avoiding relative sliding between the cable core 4 and the swing plate 5 and the partition plate 2, preventing axial misalignment and friction damage of the cable core 4. The partition member 21 and the partition plate 2 work together to diffuse the torsional force to other parts, disperse the torsional force, and prevent the torsional force from being concentrated on the cable core 4.

[0046] When the torsion reaches its maximum angle, the swing plate 5 twists until it contacts the adjacent partition plate 2, reaching the limit torsion position. The partition plate 2 acts as a rigid limit for the swing plate 5, preventing excessive torsion from damaging the connector 20 and the swing plate 5. At this time, the swing plate 5 transmits the torsional force to the partition plate 2, the rib 1 and the partition 21. Through the synergistic action of each component, the concentrated torsional force is evenly distributed throughout the entire cable structure, preventing the torsional force from being concentrated on the cable core 4 and preventing deformation of the cable core 4 and cracking of the insulation layer 801. Each component remains stable, maximizing the anti-torsion protection.

[0047] When the external forces of squeezing, bending, and torsion disappear, the squeezing airbag 7 and the buffer airbag 13 reset under the action of the inert gas 18, pushing the telescopic component 16 to contract, and the squeezing component 17 to release the squeezing of the swing plate 5; the swing plate 5 resets under its own elasticity and the action of the connecting component 20, returning to a slightly open state, and the cable core 4 resets under the push of the buffer airbag 13, returning to the center position of the placement space 3; all components return to the initial stable state, waiting for the next external force to act.

[0048] Through the graded swinging of the swing plate 5, the limiting effect of the staggered groove 6, the graded buffering of the compression airbag 7 and the buffer airbag 13, and the orderly inward movement of the cable core 4, the cable effectively resists torsional, compression, and bending external forces, preventing misalignment, friction, deformation, and damage to the insulation layer 801 of the cable core 4, thus significantly improving the cable's protective capability. The cable also exhibits good force dispersion, avoiding stress concentration: through the synergistic action of the swing plate 5, the separator plate 2, the rib 1, and the separator 21, concentrated torsional, compression, and bending stresses can be evenly dispersed throughout the entire cable structure, preventing stress concentration on the cable core 4, reducing the risk of cable damage, and extending the cable's service life. Furthermore, the coordinated operation of each protective structure allows for adaptive adjustment based on the magnitude of different external forces. The combination of flexible swinging and rigid clamping of the swing plate 5 not only adapts to the frequent torsional, compression, and bending movements of the sun-tracking system but also provides stable protection under extreme external forces, meeting the needs of complex outdoor environments and the dynamic operation of the sun-tracking system.

[0049] Example 2

[0050] In practical use, it was found that although the technical solution of the above embodiment can solve the problem of the cable having the ability to resist pressure, torsion and bending when subjected to external forces, in actual use, the existing cable shielding structure is a fixed design and cannot adaptively adjust the shielding capability according to the movement state of the cable core 4. It cannot effectively block electromagnetic interference, resulting in increased power transmission loss. When the multiple cable cores 4 move inward, the shielding capability between the cable cores 4 will decrease, and strong electromagnetic interference will be formed between the multiple cable cores 4. The shielding capability cannot be improved synchronously, thus affecting the power transmission effect.

[0051] To solve the above technical problems, based on the above embodiments, please refer to... Figures 1 to 9 As shown, the technical solution adopted includes a compression airbag 7. When the compression airbag 7 is compressed, the compression airbag 7 discharges inert gas 18 into the telescopic member 16 through the ventilation groove. The telescopic member 16 extends and pushes the compression member 17 to squeeze the corresponding two swing plates 5 to swing inward. The interlocking grooves 6 of the two swing plates 5 mesh with each other and push the cable core 4 to move in the direction of the rib 1, thereby increasing the coverage area of ​​the cable core 4 and reducing the interference between multiple cable cores 4.

[0052] Based on the above embodiments, during use, the staggered grooves 6 of the two swing plates 5 in the same placement space 3 are initially engaged, the cable core 4 is located at the center of the placement space 3, and maintains a slight gap with the swing plates 5 and the partition plate 2. The shielding layer 802 tightly wraps around the outside of the cable core 4, and the swing plates 5 are in slight contact with the shielding layer 802 to achieve a basic shielding effect. The insulation layer 801 is in a stable state and isolates electrical energy. The inner protective layer 903, the water-blocking layer 904, and the armor layer 905 play a basic protection and auxiliary shielding role.

[0053] When the cable is subjected to external forces such as torsion, compression, and bending, the cable core 4 moves towards the rib 1 under stress, causing the spacing between adjacent cable cores 4 to decrease and them to move closer to each other. This increases the electromagnetic interference between multiple cable cores 4 and reduces the anti-interference capability. At the same time, the external force is transmitted to the compression airbag 7, which is compressed and contracts, discharging some inert gas 18 into the telescopic member 16, pushing the telescopic member 16 to extend, and the compression member 17 pushes the swing plate 5 to swing slightly inward.

[0054] After the swing plate 5 swings slightly inward, the contact area with the shielding layer 802 increases, and the auxiliary shielding effect is initially improved. It forms a synergistic shield with the shielding layer 802 of the cable core 4 itself, which makes up for the defect of decreased anti-interference ability when multiple cable cores 4 are close to each other, effectively blocking electromagnetic interference between cable cores 4, and resisting some external electromagnetic interference, ensuring that power transmission is not significantly affected. At this time, the buffer airbag 13 is pushed and contracted by the cable core 4, and the inert gas 18 in the pressure stabilizing groove 14 flows through the connecting groove 15 to achieve pressure balance, assist in buffering external forces, and prevent the cable core 4 from moving excessively and causing damage to the shielding layer 802.

[0055] As the external forces of torsion, compression, and bending continue to act, the cable core 4 continues to move inward, the distance between adjacent cable cores 4 further decreases, the degree of closeness between them intensifies, and the electromagnetic interference is further enhanced; at this time, the compression airbag 7 continues to contract, pushing the telescopic member 16 to continue to extend, and the compression member 17 further compresses the swing plate 5, the swing plate 5 swings inward moderately, and the interlocking grooves 6 of the two swing plates 5 in the same placement space 3 deepen the engagement.

[0056] The fit between the swing plate 5 and the shielding layer 802 is further improved, and the auxiliary shielding effect is greatly enhanced. It forms a more stable double shielding structure with the shielding layer 802, and the shielding area is significantly increased. It can effectively block electromagnetic interference between multiple cable cores 4, while resisting various external electromagnetic interferences. The moderate swing of the swing plate 5 can also play a preliminary clamping and positioning role on the cable core 4, avoiding excessive movement of the cable core 4 that would cause the shielding layer 802 to separate from the cable core 4, and ensuring that the shielding layer 802 fits tightly. The separator 21 and the separator plate 2 work together to separate each cable core 4 into an independent space, further reducing electromagnetic interference and improving the shielding effect.

[0057] When the external force reaches its maximum and the cable core 4 moves to its limit position, the spacing between multiple cable cores 4 reaches its minimum, the electromagnetic interference between multiple cable cores 4 is the strongest and the anti-interference ability is the worst. At this time, the swing plate 5 swings to its limit position, the interlocking groove 6 is fully engaged, tightly wraps and fixes the cable core 4, and the swing plate 5 is fully attached to the shielding layer 802 to form a closed double shielding structure, and the shielding ability reaches the optimal level.

[0058] When the external forces of torsion, compression, and bending disappear, the compression airbag 7 and buffer airbag 13 reset under the action of the inert gas 18, pushing the telescopic component 16 to contract, and the compression component 17 to release the compression of the swing plate 5; the swing plate 5 resets under its own elasticity and the action of the connecting component 20, returning to a slightly open state, and returning to a basic contact state with the shielding layer 802; the cable core 4 resets under the push of the buffer airbag 13, returning to the center position of the placement space 3, the spacing between adjacent cable cores 4 returns to the initial state, and the electromagnetic interference is reduced; all components return to the initial stable state, the shielding capability returns to the basic level, and waits for the next external force.

[0059] The clamping action of the swing plate 5 prevents excessive movement of the cable core 4, avoids separation of the shielding layer 802 from the cable core 4, and ensures that the shielding layer 802 is always tightly attached to the cable core 4, effectively avoiding shielding failure. The double shielding structure of the shielding layer 802 and the swing plate 5 wrapping the cable core 4 can completely block electromagnetic interference between the cable cores 4 and from the outside, ensuring stable and reliable shielding effect. At the same time, it integrates a basic protective structure that resists torsion, pressure, and bending. Through the buffering effect of the compression airbag 7 and the buffer airbag 13, and the limiting effect of the swing plate 5, it can resist dynamic external force impact and protect the shielding layer 802 and the cable core 4. The setting of the inner sheath 903, the water-blocking layer 904, and the armor layer 905 can resist the influence of the outdoor environment and further ensure the stable operation of the shielding structure.

[0060] Good structural synergy and low maintenance cost: The shielding structure and the basic protection structure work together, eliminating the need for additional independent shielding components, simplifying the cable structure and reducing production costs; after the external force disappears, each component can automatically reset without manual intervention, reducing maintenance costs and meeting the long-term stable operation requirements of solar tracking photovoltaic systems.

[0061] Example 3

[0062] Solar-tracking cables are exposed to strong outdoor sunlight for extended periods. The cable core 4 generates Joule heat during power transmission, which, combined with the heat from the intense sunlight, easily leads to an increase in the cable's internal temperature. Simultaneously, the cable undergoes frequent twisting and bending movements with the solar-tracking system. At these points, components are prone to relative compression, obstructing heat dissipation channels and significantly reducing heat dissipation capacity. Heat easily accumulates in these areas. Traditional solar-tracking cables have significant deficiencies in heat dissipation, specifically as follows:

[0063] Traditional cables often have fixed heat dissipation structures, such as surface heat dissipation grooves or heat dissipation coatings. These structures cannot quickly dissipate the Joule heat generated by the cable core 4 combined with the heat from outdoor exposure, causing the internal temperature of the cable to rise continuously and affecting the cable's operating performance.

[0064] In areas where the cable is twisted or bent, the components are relatively compressed, the heat dissipation channels are blocked, the heat dissipation capacity is greatly reduced, and heat is easily accumulated in these areas, which accelerates the aging of the insulation layer 801, the performance degradation of the shielding layer 802, and even affects the conductivity efficiency of the cable core 4. In severe cases, it can lead to a short circuit in the cable and affect the normal operation of the sun tracking system.

[0065] Traditional heat dissipation structures cannot adapt to the dynamic motion conditions of the solar tracking system. When the cable twists or bends, the internal heat dissipation medium cannot flow, further reducing heat dissipation efficiency and failing to address the problem of localized heat accumulation. Furthermore, the heat dissipation structure of traditional cables is independent of the anti-torsion, anti-compression, and anti-bending protection structures, failing to form a coordinated linkage. When resisting external forces or component movement, the heat dissipation effect cannot be enhanced simultaneously, and component compression may even cause blockage of heat dissipation channels, further exacerbating heat accumulation.

[0066] To solve the above technical problems, based on the above embodiments, please refer to... Figures 1 to 9 As shown, the technical solution adopted includes a partition plate 2, each partition plate 2 having multiple through holes 12 on its side. The placement space 3 is filled with a flowable heat dissipation material 11. When the cable is subjected to torsional force or the swing plate 5 is closed, the closed swing plate 5 clamps and fixes the cable core 4 and twists synchronously with the external force to prevent the cable core 4 from axially misaligning. The swing plate 5 drives the heat dissipation material 11 to flow and realizes the position exchange of the heat dissipation material 11 through the through holes 12.

[0067] Based on the above embodiments, during use, when the cable is subjected to external forces of compression or bending, the compression force is sequentially transmitted to the armor layer 905, the water-blocking layer 904, and the inner sheath 903, and acts on the compression airbag 7 of the placement component 9. The compression airbag 7 is compressed and contracts, discharging some inert gas 18 into the telescopic component 16, pushing the telescopic component 16 to extend; the bending force causes the cable to form inner and outer angles, and the components at the bending part are slightly compressed relative to each other, the heat dissipation channel is blocked, the heat dissipation capacity becomes poor, and heat begins to accumulate.

[0068] At this time, under the action of compression and bending stress, the cable core 4 moves towards the rib 1, pushing the buffer airbag 13 to contract. The inert gas 18 in the buffer airbag 13 flows into the pressure stabilizing groove 14 to help buffer the external force and at the same time remove some heat. The movement of the cable core 4 and the contraction of the compression airbag 7 together push the extrusion piece 17 to squeeze the swing plate 5. The swing plate 5 swings slightly inward, causing the heat dissipation material 11 to flow initially, removing some of the heat accumulated in the bending part and alleviating the heat accumulation problem.

[0069] As the external forces of compression and bending continue to act, the telescopic component 16 continues to extend, pushing the extrusion component 17 to further compress the swing plate 5. The swing plate 5 continues to swing inward, and the interlocking grooves 6 of the two swing plates 5 in the same placement space 3 continue to engage. The swing of the swing plate 5 exerts a compression effect on the heat dissipation material 11 in the placement space 3, driving the heat dissipation material 11 to flow rapidly. Some of the heat dissipation material 11 flows into the adjacent placement space 3 through the through holes 12 on the partition plate 2, realizing rapid heat exchange between different placement spaces 3 and accelerating heat transfer. At this time, the heat dissipation material 11 is more tightly bonded to the insulation layer 801 of the cable core 4, and the heat transfer efficiency is significantly improved, specifically solving the problems of poor heat dissipation and heat accumulation at the bending part. The inert gas 18 continues to flow, helping to remove some of the heat on the rib 1, further improving the heat dissipation effect.

[0070] When the external force of compression and bending reaches its maximum, the cable core 4 moves to its limit position and is completely in the center area of ​​the cable; the swing plate 5 swings to its limit position, and the interlocking grooves 6 are fully engaged, tightly wrapping and fixing the cable core 4; at this time, the compression of the heat dissipation material 11 by the swing plate 5 reaches a stable state, and the heat dissipation material 11 is tightly attached to the insulation layer 801 of the cable core 4 under the action of the swing plate 5, and the flow speed remains stable, effectively removing the heat generated by the cable core 4 and the heat accumulated in the bending part; the heat dissipation material 11 circulates rapidly in each placement space 3 through the through hole 12 to achieve a balanced distribution of heat, completely solving the problems of poor heat dissipation and heat accumulation in the bending part; the armor layer 905 and the inner sheath 903 simultaneously assist in heat dissipation, quickly dissipating the internal heat to the external environment, ensuring the stability of the internal temperature of the cable.

[0071] When the tracking system drives the cable to twist, the torsional force is transmitted sequentially to the armor layer 905, the water-blocking layer 904, and the inner sheath 903, causing the placement component 9 and the separator 21 to twist synchronously. The separator 21 causes the separator plate 2 to twist slightly around the extension direction of the rib 1, and the separator plate 2 causes the swing plate 5 to twist synchronously through the connector 20. The components at the twisted part are slightly compressed relative to each other, the heat dissipation channel is blocked, the heat dissipation capacity becomes poor, and heat begins to accumulate. At this time, the cable core 4 moves inward toward the center of the cable under the action of the torsional force, pushing the buffer airbag 13 to contract. The inert gas 18 in the pressure stabilizing groove 14 flows through the connecting groove 15 to help buffer the torsional impact force and at the same time take away some heat. The twist of the swing plate 5 generates relative motion with the heat dissipation material 11, causing the heat dissipation material 11 to initially rotate and flow, taking away some of the heat accumulated at the twisted part.

[0072] As the torsional force continues to increase, the torsional angle of the swing plate 5 gradually increases, while it swings further inward around the cable core 4. The interlocking grooves 6 continue to deepen their engagement, generating a slight clamping force on the cable core 4. The torsional and squeezing action of the swing plate 5 drives the heat dissipation material 11 to rotate and flow rapidly, and flows into the adjacent placement space 3 through the through hole 12 on the partition plate 2. This achieves rapid circulation of the heat dissipation material 11 in multiple placement spaces 3, accelerates heat exchange in the torsional part, and solves the problems of poor heat dissipation and heat accumulation in the torsional part. The heat dissipation material 11 and the insulation layer 801 of the cable core 4 are more tightly bonded, and the heat transfer efficiency is greatly improved, effectively dissipating the Joule heat generated by the cable core 4. The inert gas 18 continues to flow, assisting in buffering and heat dissipation, and preventing the temperature of the torsional part from becoming too high.

[0073] When the cable twists to its maximum angle, the swing plate 5 twists until it contacts the adjacent partition plate 2, reaching the limit twist position. The two swing plates 5 then lock together and stop twisting. The heat dissipation material 11 continues to flow for a period of time under inertia, and then maintains a stable flow state. The heat dissipation material 11 is tightly attached to the cable core 4, and the heat exchange between each placement space 3 is achieved through the through hole 12, efficiently dissipating the heat accumulated in the twisted part. The inert gas 18 flows continuously in the pressure stabilizing groove 14 to assist in heat dissipation. The armor layer 905 and the inner sheath 903 dissipate the internal heat to the outside, ensuring the internal temperature of the cable is stable and avoiding component damage caused by high temperature.

[0074] When the external forces of compression, bending, and torsion disappear, the compression airbag 7 and the buffer airbag 13 reset under the action of the inert gas 18, pushing the telescopic component 16 to contract, and the compression component 17 to release the compression of the swing plate 5; the swing plate 5 resets under its own elasticity and the action of the connecting component 20, returning to a slightly open state, and the cable core 4 resets under the push of the buffer airbag 13, returning to the center position of the placement space 3; the heat dissipation material 11 resumes natural flow, continuing to achieve basic heat dissipation, and all components return to the initial stable state, ensuring that the heat dissipation effect is continuous and reliable.

[0075] Through the flowable heat dissipation material 11 and the through holes 12 on the partition plate 2, rapid heat exchange and dissipation are achieved, efficiently dissipating the Joule heat generated by the cable core 4 and the combined heat from outdoor exposure. At the same time, the movement of the swing plate 5 drives the flow of the heat dissipation material 11, adapting to the dynamic movement conditions of the sun-tracking system and ensuring efficient heat dissipation in both static and dynamic states. Through the linkage between the swing plate 5 and the heat dissipation material 11, when the cable twists and bends, the heat dissipation material 11 is driven to flow rapidly, accelerating heat exchange at the twisted and bent parts, effectively solving the problems of poor heat dissipation and heat accumulation in these parts, avoiding aging of the insulation layer 801, performance degradation of the shielding layer 802, and cable short circuits caused by high temperature, and ensuring long-term stable operation of the cable. At the same time, the heat dissipation material 11 can flow freely between the placement spaces 3 through the through holes 12 to achieve a balanced distribution of heat and avoid excessive local temperature. The flow of inert gas 18 assists in heat dissipation, further improving the heat dissipation effect, ensuring stable internal temperature of the cable, and not affecting the conductivity of the cable core 4 and the operating performance of each component.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A photovoltaic aluminum alloy low-voltage cable, comprising ribs, wherein multiple partition plates are fixed on the ribs, characterized in that, Two adjacent partition plates form a placement space, and a cable core is provided in each placement space. Two swing plates are provided on both sides of each partition plate. Interlocking grooves are opened on the two swing plates in the same placement space. The two swing plates in the same placement space and the corresponding partition plates together form a receiving cavity. The cable core is located in the corresponding receiving cavity. A placement member is provided on the side of the partition plates away from the ribs. The placement member is provided with multiple compression airbags corresponding to the cable core. The compression airbags are filled with inert gas. When the cable is subjected to external bending or compressive forces, the compression airbag is compressed and drives the swing plate to swing inward, so that the two swing plates close together through the interlaced grooves, forming a protective wrap around the cable core.

2. The photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, A buffer airbag is provided on the side of the placement space near the rib. Multiple pressure stabilizing grooves are provided in the rib along its extension direction. The buffer airbag is connected to the pressure stabilizing groove through a connecting groove. Multiple telescopic components are provided on the side of each compression airbag near the cable core.

3. The photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, The buffer airbag, telescopic component, and pressure stabilizing groove are also filled with inert gas. Each telescopic component has a pressing component fixed on the side near the cable core, and each pressing component can contact the side of the corresponding swing plate away from the cable core.

4. The photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, When the compression airbag is compressed, the compression airbag discharges inert gas into the telescopic member through the ventilation groove. The telescopic member extends and pushes the compression member to squeeze the two corresponding swing plates to swing inward. The interlocking grooves of the two swing plates mesh with each other and push the cable core to move in the direction of the rib, thereby increasing the coverage area of ​​the cable core and reducing interference between multiple cable cores.

5. The photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, The extrusion piece is arc-shaped, and the interlaced grooves are serrated, which can mesh with each other to form a closed space when closed.

6. The photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, Each of the partition plates has multiple through holes on its side. The placement space is filled with a flowable heat dissipation material. When the cable is subjected to torsional force or the swing plate is closed, the closed swing plate clamps and fixes the cable core and twists synchronously with the external force to prevent the cable core from axially misaligning. The swing plate drives the heat dissipation material to flow and realizes the position exchange of the heat dissipation material through the through holes.

7. The photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, Each of the placement components has multiple placement slots corresponding to the compression airbags. Each compression airbag is fixed in the corresponding placement slot. The end of each telescopic component facing the cable core passes through the corresponding placement slot and is fixedly connected to the compression component.

8. A photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, Each of the partition plates is provided with a connector, and each connector is fixedly connected to the corresponding swing plate. The connector is made of a flexible and bendable material, and the swing plate is made of elastic stainless steel with a rust-proof surface treatment to ensure long-term stability.

9. A photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, Each of the cable cores has an insulation layer on its outer side wall, and each insulation layer has a shielding layer on its outer side wall.

10. A photovoltaic aluminum alloy low-voltage cable according to claim 1, characterized in that, The placement component is provided with an inner protective layer, the outer wall of the inner protective layer is provided with a water-blocking layer, and the outer wall of the water-blocking layer is provided with an armor layer.

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