Waterproof photovoltaic cable for centralized photovoltaic power station and manufacturing method

Abstract

The invention relates to the technical field of cable manufacturing, and discloses a waterproof photovoltaic cable for a centralized photovoltaic power station and a manufacturing method, and the key points of the technical scheme are that the waterproof photovoltaic cable comprises a conductor, an insulating layer wrapped outside the conductor, a buffer layer wrapped outside the insulating layer, a waterproof layer arranged outside the buffer layer, and a coating layer arranged outside the waterproof layer, the exterior of the coating layer is provided with a shielding layer, and the exterior of the shielding layer is provided with an outer sheath. Due to the high adhesive force of the coating, invasion of external moisture and oxygen can be effectively blocked, the service life of the cable in high-humidity, strong-ultraviolet and high-temperature environments can be prolonged, and the wear resistance and aging resistance of the cable can be enhanced. And meanwhile, the spraying process is combined with the polishing pretreatment, so that a firm bonding interface is formed between the coating and the base material, and the problems of coating stripping and falling caused by insufficient adhesive force in a traditional coating process are solved.

Description

Technical Field

[0001] The invention relates to the technical field of cable manufacturing, and in particular to a waterproof photovoltaic cable for a centralized photovoltaic power station and a manufacturing method thereof. Background Art

[0002] As global energy demand continues to grow, photovoltaic power generation has developed rapidly as a clean and renewable energy source. Among them, centralized photovoltaic power stations are widely used in deserts, mountainous areas and plains with open terrain due to their large-scale and high-efficiency power generation capabilities. However, these areas are usually faced with extreme natural conditions, such as strong ultraviolet radiation, high temperature, rain erosion, sandstorms and high humidity environments, which requires photovoltaic cables to meet higher performance requirements, including excellent conductivity, weather resistance, waterproofness and mechanical strength.

[0003] Existing cables usually add aluminum foil shielding or thermoplastic polyolefin waterproof layer outside the insulation layer, but in long-term high humidity or underground environment, water vapor may still penetrate into the interior through tiny cracks, affecting the insulation performance of the cable. Further improving the protection performance of the cable has become the focus of industry attention. In order to effectively solve the limitations of existing waterproof structures, spraying technology has gradually been introduced into the manufacturing process of photovoltaic cables as a new technology. Spraying coating can form a continuous and seamless protective layer to prevent water vapor from penetrating into the interior through tiny cracks in the traditional barrier layer, thereby enhancing the protection effect of the cable in high humidity or underground environments.

[0004] However, in practical applications, the spraying process also faces some technical challenges, among which insufficient adhesion is one of the most prominent problems. The adhesion of the spray coating directly affects its long-term protective performance. If the coating is not firmly bonded to the substrate, it is easy to peel off, crack or bubble in extreme environments, which greatly reduces the protective effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a waterproof photovoltaic cable for a centralized photovoltaic power station and a manufacturing method, aiming to alleviate the above problems at least to a certain extent.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station, comprising:

[0008] Step 1: Select a high-purity copper conductor as the cable core, anneal the conductor through an annealing device, introduce the treated conductor into an extruder, and extrude a layer of polyvinyl chloride on the surface of the conductor;

[0009] Step 2: transport the conductor covered with the insulation layer to the coating equipment, and evenly coat the polyurethane sponge material outside the insulation layer through a mechanical extrusion device;

[0010] Step 3: Use wrapping equipment to tightly cover the polyester film waterproof shielding material outside the sponge layer. During the wrapping process, keep the equipment tension uniform to ensure that the shielding material is close to the surface of the sponge layer. After wrapping, use hot pressing equipment to compact the waterproof layer;

[0011] Step 4: Send the cable into the spraying device and evenly spray a layer of fluorocarbon coating;

[0012] Step 5: Wrap an aluminum foil shielding layer on the surface of the coating layer through a winding device, and use an extruder to extrude a high-density polyethylene outer sheath outside the aluminum foil shielding layer. After the outer sheath is extruded, it is quickly cooled by a cooling device. At the same time, the thickness and integrity of the outer sheath are checked by online detection equipment to ensure the final quality of the cable;

[0013] Wherein, the spraying device comprises:

[0014] A spraying rack, wherein two reels are provided on the spraying rack, one reel is used for releasing the cable, and the other reel is used for reeling the cable;

[0015] Two guide shafts are arranged on the spraying frame, and the cables are wound around the guide shafts;

[0016] A spraying cavity and a polishing cavity are arranged on the spraying rack, a material box is arranged on the top of the spraying rack, and a spraying part for spraying fluorocarbon coating is arranged between the material box and the spraying cavity;

[0017] A plurality of grinding shafts and positioning shafts disposed in the grinding chamber;

[0018] A grinding component disposed between the grinding cavity and the grinding shaft is used to rotate the grinding shaft when the grinding cavity rotates, and the grinding component can adaptively adjust the position of the grinding shaft according to the position of the positioning shaft.

[0019] Preferably, the grinding component includes a connecting frame rotatably connected to the inner wall of the grinding cavity, the bottom of the connecting frame is connected to a fixed frame, the grinding shaft is rotatably connected to the fixed frame, a spring a is connected between the fixed frame and the connecting frame, a rotating shaft is rotatably connected in the grinding cavity, a worm is connected to the rotating shaft, and a worm wheel meshing with the worm is connected to the grinding shaft.

[0020] Preferably, the polishing component also includes an annular rack connected to the spray frame, the polishing cavity is connected to a connecting shaft, the connecting shaft is connected to a gear meshing with the annular rack, and a synchronous belt transmission mechanism is provided between the connecting shaft and the rotating shaft.

[0021] Preferably, the grinding component also includes a limit frame slidably connected to both sides of the grinding cavity, the positioning shaft is rotatably connected to the limit frame, the rotating shaft is rotatably connected to the limit frame, and a spring b is provided between the limit frame and the grinding cavity.

[0022] Preferably, the synchronous belt transmission mechanism includes a connecting opening opened on the grinding cavity, a spring tension frame is provided in the connecting opening, a synchronous wheel a is provided on the spring tension frame, a synchronous wheel b is provided on the connecting shaft, a synchronous wheel c is provided on the rotating shaft, and a synchronous belt transmission member is provided between the synchronous wheels a, b and c.

[0023] Preferably, the spraying part includes a delivery pipe connected to the bottom of the material box, a pump is provided on the delivery pipe, a connecting ring is provided on one side of the delivery pipe, a connecting plate is rotatably connected inside the connecting ring, and a plurality of nozzles are provided on one side of the connecting ring, and the nozzles extend into the spraying cavity.

[0024] Preferably, an air duct is provided on the spray rack, an exhaust fan is provided in the air duct, a connecting pipe is connected to the bottom of the air duct, an annular pipe is rotatably connected to the outer wall of the polishing cavity, a connecting port connected to the annular pipe is opened on the inner wall of the polishing cavity, and the annular pipe is connected to the connecting pipe.

[0025] Preferably, a filter is provided in the air duct, a plurality of electric heating wires are also provided in the air duct, a drying chamber is provided in the spraying chamber, and an air supply pipe is connected between the air duct and the drying chamber.

[0026] Preferably, motors are provided at the bottom of the material box and the bottom of the spray rack, a chain transmission mechanism is provided between the drive shaft of one of the motors and the spray chamber, and a chain transmission mechanism is also provided between the drive shaft of the other motor and the polishing chamber.

[0027] A waterproof photovoltaic cable comprises: a conductor, an insulating layer wrapped around the outside of the conductor, a buffer layer wrapped around the outside of the insulating layer, a waterproof layer arranged outside the buffer layer, a coating layer arranged outside the waterproof layer, a shielding layer arranged outside the coating layer, and an outer sheath arranged outside the shielding layer.

[0028] In summary, the present invention mainly has the following beneficial effects:

[0029] By setting up a spraying chamber and a grinding chamber on the spraying rack, it is ensured that the cable surface reaches the best adhesion condition before spraying. In the grinding chamber, the cooperation of multiple grinding axes and positioning axes can not only effectively remove the oxide layer, dirt and impurities on the cable surface, but also leave a rough surface structure on the polyester film of the cable, increase the adhesion between the coating and the substrate. In the design, the positioning axis is used to contact the outer wall of the cable, and the diameter of the cable is measured in real time, and the position of the grinding axis is adaptively adjusted so that the grinding axis can evenly contact the outer wall of the cable, while avoiding excessive squeezing of the outer wall of the cable, ensuring that the grinding process is both efficient and does not damage the cable structure, maximizing the adhesion of the coating, and can also adapt to cable structures of different diameters. In addition, the fluorocarbon coating stored in the material box is sprayed onto the cable surface through the spraying part to form a uniform coating. After the spraying is completed, the cable enters the next process through the winding device. Through the above technical solution, the coating can be effectively attached to the cable surface, thereby significantly improving the protective performance of the cable. The high adhesion of the coating can not only effectively block the intrusion of external moisture and oxygen, extend the service life of the cable in high humidity, strong ultraviolet rays and high temperature environments, but also enhance the wear resistance and anti-aging performance of the cable. At the same time, the combination of spraying process and polishing pretreatment forms a strong bonding interface between the coating and the substrate, reducing the problem of coating peeling and falling off caused by insufficient adhesion in traditional coating processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the material box structure of the present invention;

[0032] Figure 3 It is a schematic diagram of the air duct structure of the present invention;

[0033] Figure 4 It is a schematic diagram of the grinding cavity structure of the present invention;

[0034] Figure 5 It is a schematic diagram of the grinding shaft structure of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the synchronous belt transmission mechanism of the present invention;

[0036] Figure 7 It is a schematic diagram of the spray chamber structure of the present invention;

[0037] Figure 8 It is a schematic diagram of the connecting ring structure of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of a waterproof photovoltaic cable.

[0039] Reference numerals:

[0040] 100, spraying device; 101, spraying rack; 102, reel; 103, guide shaft; 104, spraying chamber; 105, grinding chamber; 106, material box; 107, grinding shaft; 108, positioning shaft;

[0041] 200, connecting frame; 201, fixing frame; 202, spring a; 203, rotating shaft; 204, worm; 205, worm wheel;

[0042] 300, annular rack; 301, connecting shaft; 302, gear; 303, synchronous belt transmission mechanism;

[0043] 400, limit frame; 401, spring b; 402, connection opening; 403, spring tension frame; 404, synchronous wheel a; 405, synchronous wheel b; 406, synchronous wheel c; 407, synchronous belt transmission member;

[0044] 500, delivery pipe; 501, pump; 502, connecting ring; 503, connecting piece; 504, nozzle;

[0045] 600, air duct; 601, exhaust fan; 602, connecting pipe; 603, annular pipe; 604, connecting port; 605, filter; 606, heating wire; 607, drying chamber; 608, air supply pipe;

[0046] 700, motor; 701, chain transmission mechanism;

[0047] 800, conductor; 801, insulation layer; 802, buffer layer; 803, waterproof layer; 804, coating layer; 805, shielding layer; 806, outer sheath. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] refer to Figure 1-Figure 9 , a method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station, comprising:

[0050] Step 1: Select high-purity copper conductor 800 as the cable core, anneal the conductor 800 through an annealing device to improve conductivity and flexibility, introduce the treated conductor 800 into an extruder, and extrude a layer of polyvinyl chloride (PVC) insulation material on the surface of the conductor 800. The PVC material has excellent insulation and heat resistance and is suitable for cable applications;

[0051] Step 2: The conductor 800 coated with the insulating layer 801 is transported to the coating device, and the polyurethane (PU) sponge material is evenly coated on the outside of the insulating layer 801 through a mechanical extrusion device. The polyurethane sponge is flexible and has good buffering properties, which can enhance the vibration resistance of the cable;

[0052] Step 3: Use wrapping equipment to tightly cover the polyester film waterproof shielding material (such as polyester film coated with aluminum layer) outside the sponge layer. The polyester film has excellent waterproof performance and tensile strength. During the wrapping process, the equipment tension is kept uniform to ensure that the shielding material is close to the surface of the sponge layer to avoid looseness or uneven overlap. After wrapping, the waterproof layer 803 is compacted using hot pressing equipment to further enhance the shielding and waterproof performance;

[0053] Step 4: Feed the cable into the spraying device 100 and evenly spray a layer of fluorocarbon coating through a high-precision nozzle. Fluorocarbon coating has excellent corrosion resistance, weather resistance and UV resistance, and is suitable for photovoltaic cables used outdoors;

[0054] Step 5: A layer of aluminum foil shielding layer 805 is coated on the surface of the coating layer 804 through a winding device. The aluminum foil has good electromagnetic shielding performance and can effectively resist interference. An extruder is used to extrude a layer of high-density polyethylene (HDPE) outer sheath 806 outside the aluminum foil shielding layer 805. The HDPE outer sheath 806 has the characteristics of wear resistance, corrosion resistance, and aging resistance. It is the main protective layer of the cable. After the outer sheath 806 is extruded, it is quickly cooled by a cooling device. At the same time, the thickness and integrity of the outer sheath 806 are checked by online detection equipment to ensure the final quality of the cable;

[0055] Wherein, the spraying device 100 comprises:

[0056] A spraying frame 101, on which two reels 102 are arranged, one reel 102 is used for releasing the cable, and the other reel 102 is used for reeling the cable;

[0057] Two guide shafts 103 are provided on the spraying frame 101, and the cables are wound around the guide shafts 103;

[0058] A spraying chamber 104 and a polishing chamber 105 are arranged on the spraying frame 101. A material box 106 is arranged on the top of the spraying frame 101. A spraying part for spraying fluorocarbon coating is arranged between the material box 106 and the spraying chamber 104.

[0059] A plurality of grinding shafts 107 and a positioning shaft 108 disposed in the grinding chamber 105;

[0060] A grinding component disposed between the grinding chamber 105 and the grinding shaft 107, used to rotate the grinding shaft 107 when the grinding chamber 105 rotates, and the grinding component can adaptively adjust the position of the grinding shaft 107 according to the position of the positioning shaft 108;

[0061] By setting the spraying chamber 104 and the grinding chamber 105 of the spraying rack 101, it is ensured that the cable surface reaches the best adhesion condition before spraying. In the grinding chamber 105, the cooperation of multiple grinding shafts 107 and the positioning shaft 108 can not only effectively remove the oxide layer, dirt and impurities on the cable surface, but also leave a rough surface structure on the polyester film of the cable, and increase the adhesion between the coating and the substrate. In the design, the positioning shaft 108 is used to contact the outer wall of the cable, and the diameter of the cable is measured in real time, and the position of the grinding shaft 107 is adaptively adjusted so that the grinding shaft 107 can evenly contact the outer wall of the cable, while avoiding excessive squeezing of the outer wall of the cable, ensuring that the grinding process is both efficient and does not damage the cable structure, maximizing the adhesion of the coating, and can also adapt to cable structures of different diameters. In addition, the fluorocarbon coating stored in the material box 106 is sprayed onto the cable surface through the spraying part to form a uniform coating. After the spraying is completed, the cable enters the next process through the winding device. Through the above technical solution, the coating can be effectively attached to the surface of the cable, thereby significantly improving the protective performance of the cable. The high adhesion of the coating can not only effectively block the intrusion of external moisture and oxygen, extend the service life of the cable in high humidity, strong ultraviolet rays and high temperature environments, but also enhance the wear resistance and anti-aging performance of the cable. At the same time, the combination of spraying process and polishing pretreatment forms a strong bonding interface between the coating and the substrate, reducing the problem of coating peeling and falling off caused by insufficient adhesion in traditional coating processes.

[0062] As a further solution of the present invention, the grinding component includes a connecting frame 200 rotatably connected to the inner wall of the grinding cavity 105, the bottom of the connecting frame 200 is connected to a fixed frame 201, the grinding shaft 107 is rotatably connected to the fixed frame 201, a spring a202 is connected between the fixed frame 201 and the connecting frame 200, a rotating shaft 203 is rotatably connected in the grinding cavity 105, a worm 204 is connected to the rotating shaft 203, and a worm wheel 205 meshing with the worm 204 is connected to the grinding shaft 107;

[0063] By setting the meshing transmission structure of the worm 204 and the worm wheel 205, the grinding shaft 107 is driven to rotate. When the rotating shaft 203 rotates, the worm wheel 205 is driven to rotate through the worm 204, thereby driving the grinding shaft 107 to rotate at a certain speed. This design can ensure that the grinding shaft 107 maintains a stable rotation state during the working process, so as to evenly grind the cable surface.

[0064] As a further solution of the present invention, the polishing component also includes an annular rack 300 connected to the spray frame 101, a connecting shaft 301 is connected to the polishing chamber 105, a gear 302 meshing with the annular rack 300 is connected to the connecting shaft 301, and a synchronous belt transmission mechanism 303 is provided between the connecting shaft 301 and the rotating shaft 203;

[0065] By providing an annular rack 300 connected to the spray rack 101 and a gear 302 structure meshing with the annular rack 300, when the grinding cavity 105 rotates, the gear 302 rotates accordingly, and transmits the rotational motion to the synchronous belt transmission mechanism 303 through the connecting shaft 301, and the synchronous belt further transmits power to the rotating shaft 203, thereby driving the worm 204 on the rotating shaft 203 to rotate, and then driving the grinding shaft 107 to rotate through the meshing of the worm 204 and the worm wheel 205. This transmission design utilizes the rotational motion of the grinding cavity 105, and cleverly provides power for the grinding shaft 107, so that it rotates synchronously when the grinding cavity 105 rotates, thereby achieving continuous and uniform grinding of the cable surface and improving the grinding effect.

[0066] As a further solution of the present invention, the grinding component also includes a limit frame 400 slidably connected to both sides of the grinding cavity 105, the positioning shaft 108 is rotatably connected to the limit frame 400, the rotating shaft 203 is rotatably connected to the limit frame 400, and a spring b401 is provided between the limit frame 400 and the grinding cavity 105;

[0067] By setting a limit frame 400 that is slidably connected to both sides of the inside of the grinding cavity 105, combined with the function of the spring b401, the limit frame 400 can slide adaptively in the grinding cavity 105 according to the change of the cable diameter, thereby realizing the precise positioning of the outer wall of the cable. The positioning shaft 108 and the rotating shaft 203 are both connected to the grinding cavity 105 through the limit frame 400. After the position of the limit frame 400 is adjusted, the rotating shaft 203 can follow so that the grinding shaft 107 can adapt to the outer wall of the cable. In this design, the spring b401 plays the role of providing appropriate pressure to ensure that the positioning shaft 108 can stably contact the outer wall of the cable, while the grinding shaft 107 avoids excessive squeezing of the cable, ensuring the efficiency of the grinding process and the integrity of the cable.

[0068] As a further solution of the present invention, the synchronous belt transmission mechanism 303 includes a connection opening 402 opened on the grinding cavity 105, a spring tension frame 403 is arranged in the connection opening 402, a synchronous wheel a404 is arranged on the spring tension frame 403, a synchronous wheel b405 is arranged on the connecting shaft 301, and a synchronous wheel c406 is arranged on the rotating shaft 203. A synchronous belt transmission member 407 is arranged between the synchronous wheel a404, the synchronous wheel b405 and the synchronous wheel c406;

[0069] By setting up a synchronous belt transmission mechanism 303, including synchronous wheels a404, synchronous wheels b405, synchronous wheels c406 and synchronous belt transmission parts 407, it is ensured that efficient power transmission can be achieved between the rotating shaft 203 and the connecting shaft 301 in the grinding cavity 105. The synchronous wheels a404, synchronous wheels b405 and synchronous wheels c406 are set on the rotating shaft 203 and the connecting shaft 301, and the rotational motion of the connecting shaft 301 is accurately transmitted to the rotating shaft 203 through the synchronous belt transmission parts 407. The synchronous belt transmission parts 407 can reduce errors when transmitting motion, maintain the stability and accuracy of motion, and ensure that the grinding shaft 107 can maintain stable contact with the outer wall of the cable for uniform grinding. At the same time, the setting of the spring tension frame 403 can provide appropriate tension for the synchronous belt. When the rotating shaft 203 is displaced, the spring tension frame 403 can adaptively adjust the position of the synchronous wheel a404 to maintain transmission and ensure the stability of the synchronous belt transmission system.

[0070] As a further solution of the present invention, the spraying part includes a delivery pipe 500 connected to the bottom of the material box 106, a pump 501 is provided on the delivery pipe 500, a connecting ring 502 is provided on one side of the delivery pipe 500, a connecting piece 503 is rotatably connected in the connecting ring 502, and a plurality of nozzles 504 are provided on one side of the connecting ring 502, and the nozzles 504 extend into the spraying cavity 104;

[0071] By providing a pump 501, the delivery pipe 500 delivers the paint from the bottom of the material box 106 to the spray head 504 through the drive of the pump 501, ensuring that the paint can flow stably and maintain a constant pressure. The design of the connecting ring 502 and the connecting piece 503 enables multiple spray heads 504 to be flexibly distributed in the spray chamber 104 and can rotate with the spray chamber 104 to achieve uniform spraying on the cable surface.

[0072] As a further solution of the present invention, the spraying rack 101 is provided with an air duct 600, an exhaust fan 601 is provided in the air duct 600, a connecting pipe 602 is connected to the bottom of the air duct 600, an annular pipe 603 is rotatably connected to the outer wall of the polishing cavity 105, a connecting port 604 connected to the annular pipe 603 is opened on the inner wall of the polishing cavity 105, and the annular pipe 603 is connected to the connecting pipe 602;

[0073] By setting the air duct 600 and the exhaust fan 601 on the spray rack 101, the exhaust dust removal function can be effectively realized. The exhaust fan 601 in the air duct 600 generates negative pressure through operation, sucking the air inside the grinding chamber 105 and the spray chamber 104, sucking the dust, oxides and other impurities in the air into the air duct 600 for discharge to avoid the grinding dust from being retained in the working area, improving the cleanliness of the working environment, and thus preventing the subsequent cables from being contaminated by dust when receiving the spray, thereby affecting the quality of the spray coating.

[0074] As a further solution of the present invention, a filter screen 605 is provided in the air duct 600, a plurality of electric heating wires 606 are also provided in the air duct 600, a drying chamber 607 is provided in the spraying chamber 104, and an air supply pipe 608 is connected between the air duct 600 and the drying chamber 607;

[0075] By setting the filter 605, the filter 605 can effectively filter large particles of impurities in the air, such as dust and other pollutants. The setting of the electric heating wire 606 heats the air and increases the temperature of the air, so that the air has a stronger drying ability. Through the air supply pipe 608 between the air duct 600 and the drying chamber 607, the warm and dry air can be effectively blown to the coating surface, accelerating the evaporation of water and ensuring the quality and curing effect of the coating. Overall, the design of this system can not only improve the spraying quality of the cable, but also improve the automation and energy saving of production, and further optimize the production process.

[0076] As a further solution of the present invention, a motor 700 is provided at the bottom of the material box 106 and the bottom of the spray rack 101, a chain transmission mechanism 701 is provided between the driving shaft of one motor 700 and the spray chamber 104, and a chain transmission mechanism 701 is also provided between the driving shaft of the other motor 700 and the polishing chamber 105;

[0077] By setting the motor 700 and connecting the spray chamber 104 and the polishing chamber 105 with the chain transmission mechanism 701, the two chambers can be precisely controlled and driven. The motor 700 provides power through the drive shaft, and the chain transmission mechanism 701 effectively transmits the power to the spray chamber 104 and the polishing chamber 105 to achieve their synchronous or independent operation. Through the transmission of the chain, the stability and continuity of the spraying and polishing process can be ensured.

[0078] A waterproof photovoltaic cable comprises: a conductor 800, wherein the conductor 800 is externally wrapped with an insulating layer 801, the insulating layer 801 is externally coated with a buffer layer 802, the buffer layer 802 is externally provided with a waterproof layer 803, the waterproof layer 803 is externally provided with a coating layer 804, the coating layer 804 is externally provided with a shielding layer 805, and the shielding layer 805 is externally provided with an outer sheath 806.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof photovoltaic cable for a centralized photovoltaic power station, characterized in that: include: A conductor (800), wherein the conductor (800) is externally wrapped with an insulating layer (801), the insulating layer (801) is externally coated with a buffer layer (802), a waterproof layer (803) is provided externally on the buffer layer (802), a coating layer (804) is provided externally on the waterproof layer (803), a shielding layer (805) is provided externally on the coating layer (804), and an outer sheath (806) is provided externally on the shielding layer (805).

2. A method for manufacturing the waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 1, characterized in that: include: Step 1: Select a high-purity copper conductor as the cable core, anneal the conductor through an annealing device, introduce the treated conductor into an extruder, and extrude a layer of polyvinyl chloride on the surface of the conductor; Step 2: transport the conductor covered with the insulation layer to the covering device, and evenly cover the polyurethane sponge material outside the insulation layer through a mechanical extrusion device; Step 3: Use wrapping equipment to tightly cover the polyester film waterproof shielding material outside the sponge layer. During the wrapping process, keep the equipment tension uniform to ensure that the shielding material is close to the surface of the sponge layer. After wrapping, use hot pressing equipment to compact the waterproof layer; Step 4: Send the cable into the spraying device (100) and evenly spray a layer of fluorocarbon coating; Step 5: Wrap an aluminum foil shielding layer on the surface of the coating layer through a winding device, and use an extruder to extrude a high-density polyethylene outer sheath outside the aluminum foil shielding layer. After the outer sheath is extruded, it is quickly cooled by a cooling device. At the same time, the thickness and integrity of the outer sheath are checked by online detection equipment to ensure the final quality of the cable; Wherein, the spraying device (100) comprises: A spraying frame (101), wherein two reels (102) are provided on the spraying frame (101), one reel (102) is used for releasing a cable, and the other reel (102) is used for reeling in a cable; Two guide shafts (103) are arranged on the spraying frame (101), and the cables are wound around the guide shafts (103); A spraying chamber (104) and a polishing chamber (105) are arranged on the spraying frame (101); a material box (106) is arranged on the top of the spraying frame (101); and a spraying part for spraying fluorocarbon coating is arranged between the material box (106) and the spraying chamber (104); A plurality of grinding shafts (107) and positioning shafts (108) disposed in the grinding cavity (105); A grinding component disposed between the grinding cavity (105) and the grinding shaft (107) is used to rotate the grinding shaft (107) when the grinding cavity (105) rotates, and the grinding component can adaptively adjust the position of the grinding shaft (107) according to the position of the positioning shaft (108).

3. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 2, characterized in that: The grinding component comprises a connecting frame (200) rotatably connected to the inner wall of the grinding cavity (105); the bottom of the connecting frame (200) is connected to a fixing frame (201); the grinding shaft (107) is rotatably connected to the fixing frame (201); a spring a (202) is connected between the fixing frame (201) and the connecting frame (200); a rotating shaft (203) is rotatably connected in the grinding cavity (105); a worm (204) is connected to the rotating shaft (203); and a worm wheel (205) meshing with the worm (204) is connected to the grinding shaft (107).

4. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 3, characterized in that: The polishing component also includes an annular rack (300) connected to the spray frame (101), a connecting shaft (301) is connected to the polishing cavity (105), a gear (302) meshing with the annular rack (300) is connected to the connecting shaft (301), and a synchronous belt transmission mechanism (303) is provided between the connecting shaft (301) and the rotating shaft (203).

5. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 4, characterized in that: The grinding component also includes a limit frame (400) slidably connected to both sides of the grinding cavity (105), the positioning shaft (108) is rotatably connected to the limit frame (400), the rotating shaft (203) is rotatably connected to the limit frame (400), and a spring b (401) is provided between the limit frame (400) and the grinding cavity (105).

6. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 5, characterized in that: The synchronous belt transmission mechanism (303) comprises a connecting opening (402) opened on the grinding cavity (105), a spring tension frame (403) is arranged in the connecting opening (402), a synchronous wheel a (404) is arranged on the spring tension frame (403), a synchronous wheel b (405) is arranged on the connecting shaft (301), a synchronous wheel c (406) is arranged on the rotating shaft (203), and a synchronous belt transmission member (407) is arranged between the synchronous wheel a (404), the synchronous wheel b (405) and the synchronous wheel c (406).

7. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 2, characterized in that: The spraying part includes a delivery pipe (500) connected to the bottom of the material box (106), a pump (501) is provided on the delivery pipe (500), a connecting ring (502) is provided on one side of the delivery pipe (500), a connecting plate (503) is rotatably connected inside the connecting ring (502), and a plurality of nozzles (504) are provided on one side of the connecting ring (502), and the nozzles (504) extend into the spraying cavity (104).

8. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 2, characterized in that: The spraying frame (101) is provided with an air duct (600), an exhaust fan (601) is provided in the air duct (600), the bottom of the air duct (600) is connected with a connecting pipe (602), the outer wall of the polishing cavity (105) is rotatably connected with an annular tube (603), the inner wall of the polishing cavity (105) is provided with a connecting port (604) connected with the annular tube (603), and the annular tube (603) is connected with the connecting pipe (602).

9. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 8, characterized in that: A filter screen (605) is provided in the air duct (600), a plurality of electric heating wires (606) are also provided in the air duct (600), a drying chamber (607) is provided in the spraying chamber (104), and an air supply pipe (608) is connected between the air duct (600) and the drying chamber (607).

10. The method for manufacturing a waterproof photovoltaic cable for a centralized photovoltaic power station according to claim 2, characterized in that: Motors (700) are provided at the bottom of the material box (106) and the bottom of the spray rack (101), a chain transmission mechanism (701) is provided between the driving shaft of one of the motors (700) and the spray chamber (104), and a chain transmission mechanism (701) is also provided between the driving shaft of the other motor (700) and the polishing chamber (105).

Images