Aluminum alloy conductor waterproof photovoltaic cable

Abstract

The invention discloses an aluminum alloy conductor waterproof photovoltaic cable which comprises a core body, a conductor wound on the core body and an insulating layer wrapping the conductor and further comprises a waterproof assembly arranged on the outer surface of the insulating layer. The waterproof assembly is wrapped with an outer skin. The plurality of waterproof assemblies are uniformly distributed along the length direction of the cable; the waterproof assembly comprises a heat conduction ring sleeving the insulating layer and a plurality of supporting strips fixedly connected to the heat conduction ring, and the length direction of the supporting strips is the same as the length direction of the core body; the plurality of supporting strips are uniformly arranged around the core body; grooves are formed in the sides, close to the heat conduction ring, of the supporting strips, so that the cross sections of the supporting strips are U-shaped and buckled on the heat conduction ring; the supporting strips and the heat conduction rings form a closed space to form a waterproof bin. The waterproof bin can intercept entering water, the heat conduction ring guides heat generated by the cable into the waterproof bin, the water is evaporated and discharged, and the effects of water prevention and heat dissipation can be achieved at the same time.

Description

Technical Field

[0001] This invention relates to the field of cable manufacturing, and in particular to a waterproof photovoltaic cable with an aluminum alloy conductor. Background Technology

[0002] Aluminum alloy photovoltaic cables are high-temperature and low-temperature resistant photovoltaic cables with a long service life. They are specifically designed for use as leads connecting photovoltaic modules to distribution boxes in photovoltaic power generation systems. Aluminum alloy photovoltaic cables are made of materials such as cable cores, insulation layers, and sheathing layers.

[0003] Existing photovoltaic cables are generally laid bare on the ground, which causes them to be damaged by various external environmental factors, usually resulting in small cracks. However, these small cracks can easily allow rainwater to seep in, and over time, they will affect the normal use of the cables. Summary of the Invention

[0004] The waterproof photovoltaic cable with aluminum alloy conductor provided in this application adopts the following technical solution:

[0005] A waterproof photovoltaic cable with an aluminum alloy conductor includes a core, a conductor wound around the core, and an insulation layer wrapped around the conductor, and also includes a waterproof component disposed on the outer surface of the insulation layer.

[0006] The waterproof components are covered with an outer skin;

[0007] There are multiple waterproof components, which are evenly distributed along the length of the cable.

[0008] The waterproof component includes a heat-conducting ring sleeved on an insulating layer and multiple support strips fixedly connected to the heat-conducting ring, the length direction of the support strips being the same as the length direction of the core;

[0009] Multiple support bars are evenly arranged around the core;

[0010] A groove is provided on the side of the support bar near the heat-conducting ring, so that the cross-section of the support bar is U-shaped and fits into the heat-conducting ring;

[0011] The support strips and heat-conducting rings form a closed space, creating a waterproof chamber.

[0012] By adopting the above technical solution, when the outer sheath is damaged, the rainwater that seeps in will enter the waterproof chamber. One side wall of the waterproof chamber is made of a heat-conducting ring. Because the cable itself generates heat during the conduction of electrical energy, the heat-conducting ring can transfer the heat to the waterproof chamber, heating the rainwater inside and turning it into water vapor. The water vapor also has heat, so the air pressure inside the waterproof chamber increases, but not too much. When the water vapor flies out from the damaged part of the outer sheath, it will not cause the damaged part to continue to grow. The rainwater turns into water vapor and flies out, achieving the purpose of waterproofing. At the same time, it also carries away the temperature of the cable itself, so it can also achieve the purpose of cooling at the same time, reducing the resistance of the cable itself due to the increase in temperature, and achieving the effect of reducing the loss in the process of electrical energy transmission.

[0013] Optionally, the support bar is positioned away from the heat-conducting ring to avoid recessing towards the heat-conducting ring to form a flow-gathering groove;

[0014] The bottom surface of the flow collection channel has a through hole that connects to the inside of the waterproof chamber.

[0015] By adopting the above technical solution, since the cross-section of the cable is circular, a concave flow-gathering groove is provided. The flow-gathering groove can gather the infiltrated rainwater, making it easier for the rainwater to enter the waterproof chamber and preventing the rainwater from flowing to other places, thus improving the waterproof performance.

[0016] Optionally, a support block is provided between the adjacent support bars, and the support block is elastic so that it has a certain deformation.

[0017] By adopting the above technical solution, the support block supports the outer sheath and the support strip. One is to reduce the probability of deformation and damage caused by the inward concavity of the outer sheath. The other is that the cable is prone to twisting during use, and the support block supports the support strip to ensure that the waterproof chamber will not be completely deformed due to cable twisting, thus ensuring the basic shape of the waterproof chamber and enabling the waterproof chamber to perform its waterproof function normally.

[0018] Optionally, a heat sink is inserted in the middle of the support block, and the length direction of the heat sink is the same as the length direction of the cable;

[0019] One end of the heat sink extends into the heat conduction ring, while the other end protrudes from the outer skin.

[0020] By adopting the above technical solution, the heat sink can transfer heat to the external environment, thereby improving the heat dissipation efficiency of the cable, reducing the resistance of the cable itself due to the increase in temperature, and reducing power loss.

[0021] Optionally, the heat sink has multiple heat dissipation holes on its protruding end. The heat dissipation holes penetrate the heat sink along its thickness direction and are evenly distributed on the heat sink along the length of the cable.

[0022] By adopting the above technical solution, the heat dissipation holes can further increase the contact area between the heat sink and the outside world, thereby further improving the heat dissipation effect.

[0023] Optionally, the heat dissipation hole has a shape in which the diameters at both ends are larger than the diameter in the middle part, thereby creating a narrow tube effect inside the heat dissipation hole.

[0024] By adopting the above technical solution, the narrow tube effect can make the airflow through the heat dissipation hole faster, thereby increasing the pressure at the heat dissipation hole, thus enabling the airflow to carry away heat more effectively and improving the heat dissipation effect.

[0025] Optionally, the interior of the heat dissipation holes is also filled with solid paraffin wax.

[0026] By adopting the above technical solution, the presence of paraffin wax ensures that the heat dissipation holes will not be blocked during cable installation. After the heat dissipation plate dissipates heat, the paraffin wax melts and flows out, making the heat dissipation holes unobstructed and achieving the purpose of heat dissipation. Furthermore, after the paraffin wax flows onto the ground, it solidifies to form a film, which prevents moisture from the ground near the cable from easily invading the cable, thus indirectly increasing the waterproof effect.

[0027] Optionally, a partition plate is provided between adjacent waterproof components. The partition plate is in the shape of a ring, and the inner ring holes of the partition plate allow the core and wires to pass through.

[0028] By adopting the above technical solution, the isolation plate can prevent the waterproof components from interfering with each other. Therefore, if a problem occurs in a waterproof component, it can be quickly located and the cable at the problem point can be replaced without the need for complete overhaul, which is convenient and quick.

[0029] Optionally, the outer skin includes a buffer layer near the waterproof component, a middle sealing layer, and an outermost puncture-resistant layer;

[0030] The buffer layer is made of an elastic material, giving it a certain degree of elasticity;

[0031] The sealing layer is hollow and filled with water-soluble polyurethane. The water-soluble polyurethane expands and solidifies rapidly when pre-hydrated.

[0032] The puncture-resistant layer is lined with wire mesh, which passes through the heat dissipation plate.

[0033] By adopting the above technical solution, the sealing layer inside the outer sheath can play a preliminary sealing role. When the outer sheath is not severely damaged, the sealing layer can play a waterproof role. When the outer sheath is more severely damaged, the waterproof component plays the main waterproof role. Through the progressive waterproof effect, the service life of the cable can be improved.

[0034] Optionally, the waterproof chamber is filled with inert gas.

[0035] By adopting the above technical solution, the presence of inert gas can blow the water-soluble polyurethane in the sealing layer outward after the outer skin is severely damaged, preventing it from entering the flow channel and avoiding blockage of the through hole.

[0036] In summary,

[0037] 1. The waterproof chamber inside the waterproof component can store intruding rainwater, preventing it from flowing and increasing waterproof performance. The heat-conducting ring can use the heat generated by the cable itself to heat and evaporate the rainwater in the waterproof chamber. This not only removes the rainwater but also uses it to cool the cable, reducing the increased resistance of the cable due to temperature rise and reducing power loss.

[0038] 2. The heat sink can conduct heat from the cable, thus cooling it down. The heat dissipation holes can further enhance the heat dissipation effect. The paraffin wax can ensure that the heat dissipation holes will not be blocked during cable installation. After the paraffin wax melts and the heat dissipation holes perform their heat dissipation function, the paraffin wax can also form a film on the ground near the cable, preventing groundwater vapor from penetrating the cable and further improving the waterproof effect. Attached Figure Description

[0039] Figure 1 This is a cross-sectional view of the cable in the embodiment.

[0040] Figure 2 This is a longitudinal cross-sectional view of the cable in the embodiment.

[0041] Figure 3 This is an isometric view of the cable in the embodiment.

[0042] Figure 4 yes Figure 3 Enlarged view of section A.

[0043] Figure 5 is a cross-sectional view highlighting the shape of the heat dissipation holes in the embodiment.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Core; 2. Conductor; 3. Insulation layer; 4. Waterproof component; 41. Heat-conducting ring; 42. Support bar; 43. Groove; 44. Waterproof chamber; 45. Condensation channel; 46. Through hole; 47. Support block; 5. Outer skin; 51. Buffer layer; 52. Puncture-resistant layer; 53. Sealing layer; 6. Isolation plate; 7. Heat dissipation plate; 71. Heat dissipation hole. Detailed Implementation

[0046] This application discloses a waterproof photovoltaic cable with an aluminum alloy conductor. (Refer to...) Figure 1A photovoltaic cable includes a core 1, multiple conductors 2 wound around the core 1, and an insulation layer 3 wrapped around the core 1 and conductors 2. The core 1 mainly serves as a support, the conductors 2 are used for conducting electricity, and the insulation layer 3 separates the multiple conductors 2 and mainly serves as an insulation layer to prevent short circuits between the multiple conductors 2.

[0047] Reference Figure 1 and Figure 2 Multiple waterproof components 4 are provided on the outer side of the insulation layer 3. These waterproof components 4 are fitted over the insulation layer 3 and are evenly distributed along the cable's axis. Each waterproof component 4 includes an outer sheath 5, which protects and seals the internal structure, minimizing environmental impact and extending the cable's lifespan. The waterproof components 4 primarily function to prevent short circuits in the conductor 2 when the outer sheath 5 is damaged. A separator 6 separates the waterproof components 4, ensuring each component functions independently. The separator 6 has a ring-shaped structure. Its inner ring allows passage for the core 1, conductor 2, and insulation layer 3 without affecting the overall cable performance. Its outer ring fits snugly against the inner side of the outer sheath 5, maintaining its integrity.

[0048] Reference Figure 1 and Figure 2 The waterproof component 4 includes a heat-conducting ring 41 sleeved on the insulation layer 3 and multiple support strips 42 fixedly connected to the heat-conducting ring 41. The multiple support strips 42 are evenly distributed around the heat-conducting ring 41, and a groove 43 is opened on the side of the support strip 42 near the heat-conducting ring 41, so that the cross-section of the support strip 42 is U-shaped and fits into the heat-conducting ring 41. The enclosed space formed by the groove 43 and the heat-conducting ring 41 is the waterproof chamber 44. After the outer sheath 5 is damaged, the water that seeps in will enter the waterproof chamber 44. However, the heat-conducting ring 41 will conduct the heat generated by the cable itself into the waterproof chamber 44. The waterproof chamber 44 will heat the water that seeps in, turning the water into hot steam. This makes the air pressure inside the waterproof chamber 44 greater than that outside, so the water vapor will fly out again from the gap. In this process, it can also play a role in cooling, so that the heat of the photovoltaic cable itself is not too high, thus preventing its resistance from being too high, and reducing the loss of transmitted power.

[0049] Reference Figure 3 and Figure 4The support bar 42 is recessed near the outer sheath 5 towards the heat conduction ring 41 to form a flow-gathering groove 45. The bottom surface of the flow-gathering groove 45 has a through hole 46 that communicates with the inside of the waterproof chamber 44. Since the overall cross-section of the cable is circular, if the flow-gathering groove 45 is not provided, rainwater entering the outer sheath 5 will not easily enter the waterproof chamber 44. Therefore, the recessed flow-gathering groove 45 can increase the probability of rainwater entering the flow-gathering groove 45 and reduce the probability of rainwater flowing to other parts of the outer sheath, thereby further increasing the waterproof effect.

[0050] A support block 47 is also provided between adjacent support bars 42. The support block 47 is made of an elastic material, which allows the support block 47 to have a certain deformation. Because the cable cannot maintain its optimal state during installation and use, it will undergo a certain degree of twisting. Therefore, the support block 47 can provide deformation to prevent the waterproof chamber 44 from being squeezed due to the overall twisting of the cable, thus preventing the waterproof chamber 44 from failing to function properly. In addition, the support block 47 can also support the outer sheath 5, increasing the impact resistance of the outer sheath 5.

[0051] Each support block 47 is also equipped with a heat sink 7, which is located in the middle of the thickness direction of the support block 47. The width direction of the heat sink 7 is the same as the length direction of the cable, and the thickness direction of the heat sink 7 is the same as the thickness direction of the support block 47. One end of the heat sink 7 is inserted into the heat conduction ring 41, and the end of the heat sink 7 away from the heat conduction ring 41 protrudes from the outer sheath 5. The heat sink 7 is also made of a material with excellent thermal conductivity. The heat sink 7 can also conduct heat generated by the cable, and heat dissipation is achieved through the protruding end of the heat sink 7 so that the temperature of the cable itself does not become too high.

[0052] Reference Figure 4 and Figure 5 Multiple heat dissipation holes 71 are provided on the surface of the protruding end of the heat dissipation plate 7. The heat dissipation holes 71 are evenly distributed on the surface of the heat dissipation plate 7 in the thickness direction, so that the heat dissipation holes 71 pass through the heat dissipation plate 7 along the thickness direction of the heat dissipation plate 7. The outside wind can better remove heat through the heat dissipation holes 71. Moreover, the heat dissipation holes 71 are shaped with the diameter at both ends being larger than the diameter in the middle part, thus forming a narrow tube effect, which can make the wind speed through the heat dissipation holes 71 faster, thereby further improving the effect of wind force removing heat.

[0053] The heat dissipation holes 71 are also filled with paraffin wax. Initially, the paraffin wax can block the heat dissipation holes 71, so that external debris will not block the heat dissipation holes 71 during the cable installation process. After the heat dissipation plate 7 transfers heat, the paraffin wax melts and flows out, and the heat dissipation holes 71 are opened at this time, so as to achieve the purpose of heat dissipation. After the melted paraffin wax flows to the ground, it will solidify again due to the temperature drop, which can form a waterproof film on the ground near the cable, preventing underground water vapor from escaping from the vicinity of the cable, and further improving the waterproof effect.

[0054] Reference Figure 2 and Figure 4 The outer sheath 5 has a three-layer structure. The layer closest to the waterproof component 4 is a buffer layer 51, which has a certain buffering force and can reduce the impact of the cable handling process on the waterproof component 4. The outermost layer is a puncture-resistant layer 52, which is lined with wire mesh to improve the puncture resistance of the outer sheath 5 and reduce damage to the cable from sharp objects. Between the puncture-resistant layer 52 and the buffer layer 51, a water-soluble polyurethane is filled to form a sealing layer 53. Under normal conditions, the water-soluble polyurethane is in the form of a paste. After the outer sheath is damaged, rainwater enters, causing the water-soluble polyurethane to expand rapidly and fill the damaged part, thus achieving a sealing effect. Therefore, the sealing layer 53 plays a preliminary waterproofing role and further improves the waterproofing effect.

[0055] The waterproof chamber 44 is filled with inert gas. The inert gas enters the gap between the flow-collecting groove 45 and the outer skin 5 through the through hole 46. The inert gas can fill the air and provide a certain degree of support, preventing the outer skin 5 from denting and reducing the probability of damage to the outer skin 5. At the same time, because the outer skin contains water-soluble polyurethane, if the outer skin 5 is severely damaged and the water-soluble polyurethane cannot provide a seal, the water-soluble polyurethane could easily enter the flow-collecting groove 45 and block the through hole 46. Therefore, the inert gas can also flow out immediately after the outer skin 5 is damaged, preventing the water-soluble polyurethane from falling into the flow-collecting groove 45 and ensuring that the through hole 46 is not blocked.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waterproof photovoltaic cable of aluminum alloy conductor, comprising a core (1), a conductor (2) wound on the core (1), and an insulation layer (3) wrapped on the conductor (2), characterized in that: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is wrapped with an outer skin (5); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 2. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 1, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 3. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 1, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 4. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 1, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 5. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 1, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 6. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 1, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 7. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 6, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 8. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 1, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 9. A waterproof photovoltaic cable of an aluminum alloy conductor according to claim 5, characterized by: The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); The waterproof assembly (4) is provided on the outer surface of the insulation layer (3); 10. 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