Outdoor high-temperature-resistant and corrosion-resistant photovoltaic cable and preparation method thereof

Abstract

The invention relates to the technical field of electric wires and cables, in particular to an outdoor high-temperature-resistant and corrosion-resistant photovoltaic cable and a preparation method thereof.The preparation method comprises the steps that a pretreated copper rod is fed into a wire drawing machine and gradually drawn into copper wires with the preset diameter through a multi-stage wire drawing die, and a stranding machine is adopted for stranding multiple strands of copper wires into a conductor according to the specific direction and pitch; carrying out preheating treatment on an insulating material, feeding the preheated insulating material into an insulating extruder, and uniformly extruding the insulating material on a conductor through a mold to form an insulating layer; covering the insulating layer with a shielding material by adopting a braiding machine, and cooling the insulated and shielded cable; feeding a sheath material into a sheath extruder, extruding the sheath material outside the shielding layer through a mold, feeding the extruded cable into a cooling water tank, and pulling the cable to pass through a shaping device; and the cooled and shaped cable is rolled, so that the produced photovoltaic cable has excellent corrosion resistance and can effectively resist corrosion of various corrosive substances in an outdoor environment.

Description

Technical Field

[0001] The present invention relates to the technical field of electric wires and cables, and in particular to a high temperature resistant and corrosion resistant photovoltaic cable for outdoor use and a preparation method thereof. Background Art

[0002] As the global demand for renewable energy continues to grow, solar photovoltaic power generation technology has received widespread attention and application due to its clean and sustainable characteristics. As an indispensable key component in photovoltaic power generation systems, photovoltaic cables undertake the important task of transmitting electrical energy. Especially in outdoor environments, photovoltaic cables not only need to withstand long-term sunshine, wind and rain erosion, but also face extreme temperature changes and complex and changeable chemical environments.

[0003] At present, the existing outdoor photovoltaic cable preparation process on the market mainly adopts traditional material formula and processing technology. In terms of conductor selection, metal conductors such as copper or aluminum are usually used to ensure good conductivity. The insulation layer is mostly made of materials such as polyvinyl chloride (PVC) or polyethylene (PE), which are evenly coated on the conductor surface through an extrusion process.

[0004] Although the existing outdoor photovoltaic cable preparation process has met the basic electrical transmission needs to a certain extent, it still has significant defects in high temperature resistance and corrosion resistance. Traditional insulating materials such as PVC and PE are prone to softening, deformation or even melting in high temperature environments, resulting in a significant decrease in the electrical performance of the cable, and even causing safety hazards such as short circuits and fires. In addition, although some manufacturers have increased the corrosion resistance of the cable by adding protective layers, these protective layers often have problems such as poor durability and easy to fall off, and cannot effectively protect the cable from corrosive substances for a long time. Summary of the invention

[0005] The purpose of the present invention is to provide a high temperature and corrosion resistant photovoltaic cable for outdoor use and a preparation method thereof, which solves the problem that existing traditional insulating materials such as PVC and PE are prone to softening, deformation or even melting in a high temperature environment, resulting in a significant decrease in the electrical performance of the cable, and even causing safety hazards such as short circuits and fires, and cannot effectively protect the cable from erosion by corrosive substances.

[0006] To achieve the above object, the present invention provides a method for preparing a high temperature resistant and corrosion resistant photovoltaic cable for outdoor use, comprising the following steps:

[0007] The pre-treated copper rod is fed into a wire drawing machine, and is gradually drawn into a copper wire of a predetermined diameter through a multi-stage wire drawing die, and a stranding machine is used to strand multiple copper wires into a conductor in a specific direction and pitch;

[0008] Preheat the insulating material, feed the preheated insulating material into the insulating extruder, and extrude it evenly on the conductor through the die to form an insulating layer;

[0009] According to the cable design requirements, a braiding machine is used to cover the shielding material on the insulation layer, and the insulated and shielded cable is cooled;

[0010] The sheath material is fed into the sheath extruder, extruded onto the shielding layer through a die, and the extruded cable is fed into a cooling water tank, while the cable is pulled through a shaping device;

[0011] The cable is reeled after cooling and shaping, and the reeled cable is cleaned.

[0012] Among them, in “feeding the pretreated copper rod into a wire drawing machine, gradually drawing it into a copper wire of a predetermined diameter through a multi-stage wire drawing die, and using a stranding machine to strand multiple copper wires into a conductor in a specific direction and pitch”, the method includes the following steps:

[0013] Before the copper rod is sent to the wire drawing machine, it is cleaned and pre-treated on the surface to remove oil, dust and impurities on the surface of the copper rod, and pickled and passivated;

[0014] The pre-treated copper rod is fed into the wire drawing machine, and the copper rod passes through the first-stage die and is initially drawn into a thicker copper wire, and then the copper wire passes through the subsequent stages of dies in sequence until the predetermined diameter requirement is reached;

[0015] The copper wire drawn by the multi-stage wire drawing die is twisted by a stranding machine. Multiple strands of copper wire are fed into the stranding die at the same time and twisted in a predetermined direction and pitch to obtain a conductor.

[0016] Among them, in “preheating the insulating material, feeding the preheated insulating material into an insulating extruder, and evenly extruding it on the conductor through a die to form an insulating layer”, the method includes the following steps:

[0017] Place the insulating material into the preheating device, adjust the internal processing temperature of the waste heat device, and set the preheating time;

[0018] Feed the preheated insulation material into the feed port of the insulation extruder, continuously convey the insulation material to the screw part of the extruder, and adjust the aperture and shape of the die;

[0019] The preheated and softened insulating material is pushed to the die by the screw. The screw rotates and pushes the insulating material out of the die and tightly wraps it around the conductor to form a uniform and continuous insulating layer.

[0020] Among them, in “according to the cable design requirements, a braiding machine is used to cover the shielding material on the insulation layer, and the insulated and shielded cable is cooled”, the steps include:

[0021] According to the specific design requirements of the cable, select a suitable braiding machine to braid the shielding layer, and load the selected shielding material into the feeding system of the braiding machine according to the specified specifications and quantity;

[0022] Start the braiding machine, feed the cable covered with the insulation layer into the working area of ​​the braiding machine, and the braiding machine evenly covers the shielding material on the insulation layer according to a predetermined braiding method;

[0023] The cable with braided shielding layer is sent to the cooling equipment for cooling treatment, and the temperature and time of the cooling medium are controlled.

[0024] Among them, in the step of “feeding the sheath material into a sheath extruder, extruding it outside the shielding layer through a die, feeding the extruded cable into a cooling water tank, and pulling the cable through a shaping device”, the method further includes the following steps:

[0025] According to the specifications and design requirements of the cable, the sheath material is selected, the selected sheath material is loaded into the feeding system of the sheath extruder, the sheath extruder is started, and its temperature and pressure parameters are adjusted;

[0026] Feed the cable covered with the shielding layer into the working area of ​​the sheath extruder to prepare for the sheath extrusion operation;

[0027] The screw of the sheath extruder pushes the sheath material to the die. Through the rotation and advancement of the screw, the sheath material is extruded from the die and tightly coated on the shielding layer to form a uniform and continuous sheath layer.

[0028] The extruded cable is sent to a cooling water tank for cooling, the temperature of the cable is reduced to below room temperature, and the sheath layer is solidified and shaped;

[0029] The traction cable passes through a shaping device with internally designed shaping holes to correct the shape and control the size of the cable.

[0030] Among them, in “reeling up the cable after cooling and shaping, and cleaning the reeled cable”, the method includes the following steps:

[0031] Pull the cable to the input end of the winder and lay the cable head flat;

[0032] Start the winder and adjust its speed and tension control system to wind the cable around the winder drum;

[0033] Use a rag to wipe the cable surface to remove stains and impurities on the cable surface, and place the cable in a dry, ventilated environment to dry.

[0034] A high temperature resistant and corrosion resistant photovoltaic cable for outdoor use is prepared by the high temperature resistant and corrosion resistant photovoltaic cable preparation method for outdoor use.

[0035] The invention discloses a high temperature and corrosion resistant photovoltaic cable for outdoor use and a preparation method thereof. The method comprises the following steps: feeding a pretreated copper rod into a wire drawing machine, gradually drawing the copper wire into a predetermined diameter through a multi-stage wire drawing die, and twisting a plurality of copper wires into a conductor in a specific direction and pitch by a stranding machine; preheating the insulating material, feeding the preheated insulating material into an insulating extruder, and uniformly extruding and wrapping the insulating material on the conductor through a die to form an insulating layer; using a braiding machine to cover the insulating layer with a shielding material according to the cable design requirements, and cooling the insulated and shielded cable; feeding the sheath material into a sheath extruder, extruding the shielding material outside the shielding layer through a die, feeding the extruded cable into a cooling water tank, and pulling the cable through a shaping device at the same time; winding the cable after cooling and shaping, and cleaning the wound cable; and finally producing a photovoltaic cable through multiple links of conductor processing, insulation treatment, shielding layer manufacturing, and sheath coating, which not only has excellent high temperature resistance, can maintain stable electrical and mechanical properties in an extremely high temperature environment, but also has excellent corrosion resistance, and can effectively resist the erosion of various corrosive substances in an outdoor environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0037] Figure 1 It is a flow chart of the method for preparing the outdoor high temperature and corrosion resistant photovoltaic cable of the present invention.

[0038] Figure 2 The invention provides a flow chart of feeding a pretreated copper rod into a wire drawing machine, gradually drawing the copper wire into a predetermined diameter through a multi-stage wire drawing die, and using a stranding machine to strand multiple copper wires into a conductor in a specific direction and pitch.

[0039] Figure 3 The present invention is a flow chart of preheating the insulating material, feeding the preheated insulating material into an insulating extruder, and evenly extruding the insulating material onto a conductor through a die to form an insulating layer.

[0040] Figure 4 The present invention is a flow chart of using a braiding machine to cover the shielding material on the insulating layer according to the cable design requirements, and cooling the insulated and shielded cable.

[0041] Figure 5 The invention is a flow chart of feeding the sheath material into a sheath extruder, extruding it outside the shielding layer through a die, feeding the extruded cable into a cooling water tank, and pulling the cable through a shaping device at the same time.

[0042] Figure 6 The present invention is a flow chart of winding up the cable after cooling and shaping, and cleaning the wound cable. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0044] See also Figures 1 to 6 , Figure 1 It is a flow chart of the method for preparing the outdoor high temperature resistant and corrosion resistant photovoltaic cable of the present invention; Figure 2 The present invention is a flow chart of feeding a pre-treated copper rod into a wire drawing machine, gradually drawing the copper wire into a predetermined diameter through a multi-stage wire drawing die, and using a stranding machine to strand multiple copper wires into a conductor in a specific direction and pitch; Figure 3 It is a flow chart of the present invention for preheating the insulating material, feeding the preheated insulating material into an insulating extruder, and evenly extruding the insulating material onto the conductor through a die to form an insulating layer; Figure 4 It is a flow chart of the present invention, according to the cable design requirements, using a braiding machine to cover the shielding material on the insulation layer, and cooling the insulated and shielded cable; Figure 5 It is a flow chart of the present invention that the sheath material is fed into the sheath extruder, extruded and wrapped outside the shielding layer through a die, the extruded cable is fed into a cooling water tank, and the cable is pulled through a shaping device at the same time; Figure 6 The present invention is a flow chart of winding up the cable after cooling and shaping, and cleaning the wound cable.

[0045] A method for preparing a high temperature resistant and corrosion resistant photovoltaic cable for outdoor use comprises the following steps:

[0046] S1: The pretreated copper rod is fed into a wire drawing machine, and is gradually drawn into a copper wire of a predetermined diameter through a multi-stage wire drawing die, and a stranding machine is used to strand multiple copper wires into a conductor in a specific direction and pitch;

[0047] S11: Before the copper rod is fed into the wire drawing machine, the copper rod is cleaned and pre-treated on the surface to remove oil, dust and impurities on the surface of the copper rod, and pickled and passivated;

[0048] S12: The pretreated copper rod is fed into a wire drawing machine, and the copper rod passes through a first-stage die to be initially drawn into a thicker copper wire, and then the copper wire passes through subsequent stages of dies in sequence until a predetermined diameter requirement is reached;

[0049] S13: The copper wire drawn by the multi-stage wire drawing die is twisted by a twisting machine. Multiple strands of copper wire are simultaneously fed into the twisting die and twisted in a predetermined direction and pitch to obtain a conductor.

[0050] In this embodiment:

[0051] Step 1: Pretreatment of copper rod

[0052] Before feeding the copper rod into the wire drawing machine, the copper rod needs to be pretreated first. This step mainly includes cleaning and surface treatment of the copper rod. Cleaning is to remove impurities such as oil, dust, etc. on the surface of the copper rod to ensure the smooth operation of the mold and the quality of the copper wire during the wire drawing process. Surface treatment may include processes such as pickling and passivation to improve the corrosion resistance and surface finish of the copper rod, laying a good foundation for the subsequent wire drawing process. After the pretreatment is completed, the surface of the copper rod should be uniform, smooth and flawless.

[0053] Step 2: Multi-stage drawing dies gradually draw copper wire

[0054] The pre-treated copper rod is fed into the wire drawing machine and begins the wire drawing process. The wire drawing machine is equipped with multi-stage drawing dies, the apertures of which gradually decrease, forming a continuous drawing channel. The copper rod first passes through the first-stage die and is initially drawn into a thicker copper wire. Then, the copper wire passes through the subsequent dies in turn, and its diameter is further reduced with each subsequent die until it reaches the predetermined diameter requirement. During the wire drawing process, the drawing speed and pulling force need to be strictly controlled to ensure that the copper wire is of uniform quality and without breakage. At the same time, in order to maintain the smooth operation of the die and extend its service life, the copper chips and impurities inside the die need to be cleaned regularly.

[0055] Step 3: Wire stranding machine twists the wires into conductors

[0056] After the copper wire is drawn by multi-stage wire drawing dies, it needs to be twisted by a stranding machine. The stranding machine is equipped with multiple stranding heads and stranding dies, which can adjust the direction and pitch of the stranded wires as needed. During the stranding process, multiple strands of copper wire are fed into the stranding die at the same time and twisted in a specific direction and pitch. The purpose of twisting is to increase the softness and toughness of the conductor, while improving the conductivity and mechanical strength of the conductor. After the twisting is completed, the resulting conductor should have a uniform twisting structure, good conductivity and sufficient mechanical strength to meet the subsequent production requirements of wires and cables.

[0057] S2: Preheat the insulating material, feed the preheated insulating material into the insulating extruder, and extrude it evenly on the conductor through the die to form an insulating layer:

[0058] S21: placing the insulating material into the preheating device, adjusting the internal processing temperature of the waste heat device, and setting the preheating time;

[0059] S22: feeding the preheated insulating material into the feed port of the insulating extruder, continuously conveying the insulating material to the screw part of the extruder, and adjusting the aperture and shape of the die;

[0060] S23: The preheated and softened insulating material is pushed to the die by the screw. The screw rotates and pushes the insulating material out of the die and tightly wraps it around the conductor to form a uniform and continuous insulating layer.

[0061] In this embodiment:

[0062] Step 1: Preheating of insulation materials

[0063] Preheating is a key step before extruding the insulating material. The main purpose of preheating is to make the insulating material reach a suitable processing temperature, thereby enhancing its plasticity and fluidity for subsequent extrusion operations. Preheating is usually carried out in a dedicated preheating device that can provide a uniform and controllable temperature environment. The preheating temperature and time will vary depending on the type and characteristics of the insulating material. During the preheating process, it is necessary to regularly check the temperature distribution of the insulating material to ensure that all parts can reach the predetermined preheating temperature to avoid extrusion quality problems caused by uneven temperature.

[0064] Step 2: Insulation material delivery and extrusion preparation

[0065] The preheated insulation material is fed into the feed port of the insulation extruder. The extruder is designed with an efficient conveying system that can stably and continuously convey the insulation material to the screw part of the extruder. During the conveying process, the insulation material is further heated and softened to adapt to the high pressure and high shear force during the extrusion process. At the same time, the die of the extruder has been preheated to a suitable temperature to ensure that the insulation material can be evenly and smoothly coated on the conductor during extrusion. The preparation work before extrusion also includes adjusting the aperture and shape of the die to meet the requirements of the insulation layer of different wires and cables.

[0066] Step 3: Extrusion and molding of insulation layer

[0067] In the insulation extruder, the preheated and softened insulation material is pushed to the die by the screw. The mold is designed with precise flow channels to ensure that the insulation material can be evenly and continuously distributed around the conductor during extrusion. As the screw rotates and advances, the insulation material is extruded out of the die and tightly wrapped around the conductor to form a uniform and continuous insulation layer. During the extrusion process, parameters such as extrusion speed, temperature and pressure need to be strictly controlled to ensure that the thickness, uniformity and electrical properties of the insulation layer meet the requirements. At the same time, the extruded insulation layer needs to be cooled and cured to further improve its physical properties and stability. .

[0068] S3: According to the cable design requirements, a braiding machine is used to cover the shielding material on the insulation layer, and the insulated and shielded cable is cooled;

[0069] S31: According to the specific design requirements of the cable, select a suitable braiding machine to braid the shielding layer, and load the selected shielding material into the feeding system of the braiding machine according to the specified specifications and quantity;

[0070] S32: starting the braiding machine, feeding the cable covered with the insulation layer into the working area of ​​the braiding machine, and the braiding machine evenly covers the shielding material on the insulation layer according to a predetermined braiding method;

[0071] S33: Send the cable after the shielding layer is braided into a cooling device for cooling, and control the temperature and time of the cooling medium.

[0072] In this embodiment:

[0073] Step 1: Braiding Machine Preparation and Shielding Material Loading

[0074] According to the specific design requirements of the cable, select a suitable braiding machine to braid the shielding layer. First, ensure that the braiding machine is in good working condition, all components are operating normally, and the tension control system is accurate. Subsequently, the selected shielding material (such as copper wire, aluminum-magnesium alloy wire or tinned copper wire, etc.) is loaded into the feeding system of the braiding machine according to the specified specifications and quantity. Ensure that the supply of shielding material is continuous and stable to avoid material breakage or uneven material during the braiding process.

[0075] Step 2: Braiding of the Shield

[0076] Start the braiding machine and feed the cable covered with the insulation layer into the working area of ​​the braiding machine. The braiding machine uses a precise braiding process to evenly cover the shielding material on the insulation layer in a specific braiding method (such as tight braiding, loose braiding, etc.). During the braiding process, it is necessary to monitor the tightness and uniformity of the braiding in real time to ensure that the shielding layer can effectively isolate external electromagnetic interference while maintaining the flexibility and mechanical strength of the cable. In addition, the running speed of the braiding machine needs to be adjusted according to the length of the cable and design requirements to ensure the continuity and efficiency of the braiding process.

[0077] Step 3: Cooling and curing of the cable

[0078] After the shielding layer is braided, the cable needs to be cooled to ensure the structural stability and electrical performance of the insulation and shielding layers. The braided cable is sent to a dedicated cooling device, such as a cooling water tank or cooling tunnel. During the cooling process, the temperature and time of the cooling medium need to be controlled to avoid cracks or deformation of the cable due to rapid temperature changes. At the same time, it is also necessary to ensure that the cable maintains appropriate tension during the cooling process to prevent the shielding layer from relaxing and affecting its shielding effect. After sufficient cooling and curing, the insulation and shielding layers of the cable will reach the best physical and electrical performance state, providing reliable protection for subsequent cable testing and use.

[0079] S4: The sheath material is fed into the sheath extruder, extruded onto the shielding layer through a die, and the extruded cable is fed into a cooling water tank, while the cable is pulled through a shaping device;

[0080] S41: Select the sheath material according to the specifications and design requirements of the cable, load the selected sheath material into the feeding system of the sheath extruder, start the sheath extruder, and adjust its temperature and pressure parameters;

[0081] S42: Send the cable covered with the shielding layer into the working area of ​​the sheath extruder to prepare for the sheath extrusion operation;

[0082] S43: The screw of the sheath extruder pushes the sheath material to the die. Through the rotation and advancement of the screw, the sheath material is extruded out of the die and tightly coated on the shielding layer to form a uniform and continuous sheath layer;

[0083] S44: The extruded cable is sent to a cooling water tank for cooling, the temperature of the cable is reduced to below room temperature, and the sheath layer is solidified;

[0084] S45: The traction cable passes through a shaping device with internally designed shaping holes to correct the shape and control the size of the cable.

[0085] In this embodiment,

[0086] Step 1: Preparation of sheath material and feeding into sheath extruder

[0087] First, according to the specifications and design requirements of the cable, select the appropriate sheath material. The sheath material usually has good wear resistance, weather resistance and flame retardancy to protect the insulation layer and shielding layer inside the cable from damage by the external environment. Load the selected sheath material into the feeding system of the sheath extruder to ensure a continuous and stable supply of the material. Start the sheath extruder and adjust its parameters such as temperature and pressure to make the sheath material reach a suitable processing state. Subsequently, the cable covered with the shielding layer is fed into the working area of ​​the sheath extruder to prepare for the sheath extrusion operation.

[0088] Step 2: Extrusion and molding of the sheath

[0089] The screw of the sheath extruder pushes the sheath material to the die. The mold is designed with precise flow channels to ensure that the sheath material can be evenly and continuously distributed outside the shielding layer during extrusion. As the screw rotates and advances, the sheath material is extruded from the die and tightly wrapped on the shielding layer to form a uniform and continuous sheath layer. During the extrusion process, parameters such as extrusion speed, temperature and pressure need to be strictly controlled to ensure that the thickness, uniformity and physical properties of the sheath layer meet the requirements. At the same time, the transmission speed of the cable needs to be monitored to ensure that the sheath layer is tightly combined with the insulation layer and shielding layer inside the cable, without defects such as bubbles and cracks.

[0090] Step 3: Cable cooling and shaping

[0091] After the sheath is extruded, the extruded cable is sent to the cooling water tank. The cooling water tank is filled with an appropriate amount of cooling water. Through the heat exchange between water and cable, the temperature of the cable is quickly reduced to below room temperature, so that the sheath layer is quickly solidified and shaped. During the cooling process, the temperature and flow rate of the cooling water need to be controlled to avoid cracks or deformation of the cable due to rapid temperature changes. At the same time, the cable needs to be pulled through the shaping device. The shaping device is designed with shaping holes that match the shape of the cable, which can further correct the shape and control the size of the cable to ensure that the outer diameter and shape of the cable meet the design requirements. After sufficient cooling and shaping, the sheath layer of the cable will achieve the best physical properties and dimensional stability, providing reliable protection for subsequent cable testing and use.

[0092] S5: reeling the cooled and shaped cables, and cleaning the reeled cables;

[0093] S51: Pull the cable to the input end of the winder and lay the head of the cable flat;

[0094] S52: Start the winding machine and adjust its speed and tension control system so that the cable is wound on the winding drum;

[0095] S53: Use a rag to wipe the cable surface to remove stains and impurities on the cable surface, and place the cable in a dry, ventilated environment to dry.

[0096] In this embodiment,

[0097] Step 1: Cable reeling

[0098] After cooling and shaping, the sheath layer of the cable has solidified and reached a stable state. At this time, it needs to be reeled up for subsequent storage and transportation. First, pull the cable to the input end of the reel to ensure that the head of the cable is flat and easy to fix. Start the reel and adjust its speed and tension control system so that the cable can be wound around the reel smoothly and continuously. During the reeling process, it is necessary to monitor the winding state of the cable in real time to ensure that there is no overlap or extrusion between the cables, and that the speed of the reel matches the conveying speed of the cable to avoid deformation or damage of the cable due to excessive or insufficient tension. At the same time, it is also necessary to record the diameter of the reel and the length of the cable for subsequent cable management and use.

[0099] Step 2: Cleaning the reeled cable

[0100] After winding, some coolant, dust or other impurities may remain on the surface of the cable, which may affect the appearance quality and electrical performance of the cable. Therefore, the wound cable needs to be cleaned. First, use a clean rag or brush to gently wipe the surface of the cable to remove obvious stains and impurities. Then, use appropriate detergents (such as alcohol, acetone, etc.) and cleaning tools (such as sponges, soft brushes, etc.) to further clean the cable. During the cleaning process, it is necessary to avoid using overly rough tools or chemicals to avoid damaging the cable surface or affecting its performance. After cleaning, place the cable in a dry and ventilated environment and let it dry naturally to ensure that there is no residual moisture and detergent on the cable surface, so as to prepare for subsequent cable testing and use.

[0101] A high temperature resistant and corrosion resistant photovoltaic cable for outdoor use is prepared by the method for preparing a high temperature resistant and corrosion resistant photovoltaic cable for outdoor use, wherein the structure of the high temperature resistant and corrosion resistant photovoltaic cable for outdoor use is:

[0102] Conductor: The conductor is made of multiple strands of fine copper wires twisted together to improve the flexibility and bending resistance of the cable. Copper wire has good conductivity and mechanical strength, which can meet the requirements of photovoltaic cables for current transmission.

[0103] Insulation layer: The insulation layer is made of materials with high insulation performance and high temperature resistance, such as cross-linked polyethylene (XLPE) or ethylene propylene rubber (EPR). These materials have excellent insulation performance and aging resistance, and can protect the conductor from erosion by the external environment.

[0104] Shielding layer: The shielding layer is mainly used to reduce electromagnetic interference and improve the anti-interference ability of the cable. Using metal braided mesh or metal foil as shielding material can effectively shield the interference of external electromagnetic fields.

[0105] Sheath layer: The sheath layer is made of weather-resistant and corrosion-resistant materials, such as specially formulated polyvinyl chloride (PVC) or polyolefin (PO). These materials can protect the internal structure of the cable from the influence of the external environment and increase the service life of the cable.

[0106] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A method for preparing a high temperature and corrosion resistant photovoltaic cable for outdoor use, characterized in that: The steps include: The pre-treated copper rod is fed into a wire drawing machine, and is gradually drawn into a copper wire of a predetermined diameter through a multi-stage wire drawing die, and a stranding machine is used to strand multiple copper wires into a conductor in a specific direction and pitch; Preheat the insulating material, feed the preheated insulating material into the insulating extruder, and extrude it evenly on the conductor through the die to form an insulating layer; According to the cable design requirements, a braiding machine is used to cover the shielding material on the insulation layer, and the insulated and shielded cable is cooled; The sheath material is fed into the sheath extruder, extruded onto the shielding layer through a die, and the extruded cable is fed into a cooling water tank, while the cable is pulled through a shaping device; The cable is reeled after cooling and shaping, and the reeled cable is cleaned.

2. The method for preparing a high temperature and corrosion resistant photovoltaic cable for outdoor use according to claim 1, characterized in that: In "feeding the pretreated copper rod into a wire drawing machine, gradually drawing it into a copper wire of a predetermined diameter through a multi-stage wire drawing die, and using a stranding machine to strand multiple copper wires into a conductor in a specific direction and pitch", the method includes the following steps: Before the copper rod is sent to the wire drawing machine, it is cleaned and pre-treated on the surface to remove oil, dust and impurities on the surface of the copper rod, and pickled and passivated; The pre-treated copper rod is fed into the wire drawing machine, and the copper rod passes through the first-stage die and is initially drawn into a thicker copper wire, and then the copper wire passes through the subsequent stages of dies in sequence until the predetermined diameter requirement is reached; The copper wire drawn by the multi-stage wire drawing die is twisted by a stranding machine. Multiple strands of copper wire are fed into the stranding die at the same time and twisted in a predetermined direction and pitch to obtain a conductor.

3. The method for preparing a high temperature and corrosion resistant photovoltaic cable for outdoor use according to claim 1, characterized in that: In "preheating the insulating material, feeding the preheated insulating material into an insulating extruder, and evenly extruding the insulating material onto the conductor through a die to form an insulating layer", the method comprises the following steps: Place the insulating material into the preheating device, adjust the internal processing temperature of the waste heat device, and set the preheating time; Feed the preheated insulation material into the feed port of the insulation extruder, continuously convey the insulation material to the screw part of the extruder, and adjust the aperture and shape of the die; The preheated and softened insulating material is pushed to the die by the screw. The screw rotates and pushes the insulating material out of the die and tightly wraps it around the conductor to form a uniform and continuous insulating layer.

4. The method for preparing a high temperature and corrosion resistant photovoltaic cable for outdoor use according to claim 1, characterized in that: In "according to the cable design requirements, a braiding machine is used to cover the shielding material on the insulation layer, and the insulated and shielded cable is cooled", the steps include: According to the specific design requirements of the cable, select a suitable braiding machine to braid the shielding layer, and load the selected shielding material into the feeding system of the braiding machine according to the specified specifications and quantity; Start the braiding machine, feed the cable covered with the insulation layer into the working area of ​​the braiding machine, and the braiding machine evenly covers the shielding material on the insulation layer according to a predetermined braiding method; The cable with braided shielding layer is sent to the cooling equipment for cooling treatment, and the temperature and time of the cooling medium are controlled.

5. The method for preparing a high temperature and corrosion resistant photovoltaic cable for outdoor use according to claim 1, characterized in that: In "feeding the sheath material into a sheath extruder, extruding it outside the shielding layer through a die, feeding the extruded cable into a cooling water tank, and pulling the cable through a shaping device", the method further includes the following steps: According to the specifications and design requirements of the cable, the sheath material is selected, the selected sheath material is loaded into the feeding system of the sheath extruder, the sheath extruder is started, and its temperature and pressure parameters are adjusted; Feed the cable covered with the shielding layer into the working area of ​​the sheath extruder to prepare for the sheath extrusion operation; The screw of the sheath extruder pushes the sheath material to the die. Through the rotation and advancement of the screw, the sheath material is extruded from the die and tightly coated on the shielding layer to form a uniform and continuous sheath layer. The extruded cable is sent to a cooling water tank for cooling, the temperature of the cable is reduced to below room temperature, and the sheath layer is solidified and shaped; The traction cable passes through a shaping device with internally designed shaping holes to correct the shape and control the size of the cable.

6. The method for preparing a high temperature and corrosion resistant photovoltaic cable for outdoor use according to claim 1, characterized in that: In "reeling up the cable after cooling and shaping, and cleaning the reeled cable", the method comprises the following steps: Pull the cable to the input end of the winder and lay the cable head flat; Start the winder and adjust its speed and tension control system to wind the cable around the winder drum; Use a rag to wipe the cable surface to remove stains and impurities on the cable surface, and place the cable in a dry, ventilated environment to dry.

7. A high temperature and corrosion resistant photovoltaic cable for outdoor use, characterized in that: The photovoltaic cable is prepared by the method for preparing a high temperature and corrosion resistant outdoor photovoltaic cable as described in any one of claims 1 to 6.

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