A scratch-resistant photovoltaic cable and its production process

Abstract

The present invention discloses a scratch-resistant photovoltaic cable and a production process thereof. The present invention relates to the field of photovoltaic cable technology, including a joint mechanism, the joint mechanism is fixedly installed on the surface of a polyethylene tube near the end face, and the surface of the joint mechanism is fixedly connected with a heat shrink tube and an outer sleeve. The scratch-resistant photovoltaic cable and its production process achieve the temperature rise of the copper wire during use, and the heat is transferred to the airflow component through the heat-conducting insulating glue and the special-shaped heat-conducting tube. A plurality of airflow components are evenly distributed on the outside of the special-shaped heat-conducting tube, so that an airflow channel is formed between the special-shaped heat-conducting tube and the heat shrink tube, and the cooling gas flows from one end of the polyethylene tube to the other end to be extracted, thereby quickly reducing the copper wire. In this process, the cooling structure is inside the cable, so that the heat transfer efficiency is effectively improved, and the problem that the protective structure will cause the heat dissipation efficiency of the cable to be reduced, making the cable more easily punctured and burned, is solved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic cables, in particular to a scratch-resistant photovoltaic cable and a production process thereof. Background Art

[0002] Photovoltaic cables are mainly used to transmit electrical energy. In harsh environments, cables may be subjected to greater mechanical stress, such as strong winds, vibrations or pressure from heavy objects. Existing photovoltaic cables are more likely to break, damage or expose conductors under these conditions. There are many sharp rocks exposed on the surface of mountainous areas and the environment is harsh. When laying cables in mountainous areas or laying cables on urban roads with uneven ground and obstacles such as stones, when the cables are dragged, the sharp rocks exposed on the surface can easily scratch the wear-resistant layer, or even break the wear-resistant layer and then scratch the wire core, thereby affecting the cable's stable transmission of electricity and electrical signals. Photovoltaic cables used at high power are prone to overheating, causing cable burns and breakdown. The Chinese patent announcement number is: CN110867278A discloses "A high-strength photovoltaic cable". In this patent, the outside of the conductor is provided with an inner reinforcement layer and an outer reinforcement layer from the inside to the outside to make the photovoltaic cable highly resistant to stretching. The inner reinforcement layer and the outer reinforcement layer are respectively composed of a plurality of circular sleeves, and a buffer air cavity is provided inside the circular sleeve. The circular sleeves in the outer reinforcement layer are staggered and distributed at the junction of every two circular sleeves in the inner reinforcement layer. However, the reinforcement structure in this patent will cause the bending performance of the cable to decrease, and the speed of heat dissipation will decrease, thereby making it easier to cause electrical breakdown.

[0003] Existing scratch-resistant photovoltaic cables and their production processes have structural design defects. The presence of a protective structure will reduce the heat dissipation efficiency of the cable, making the cable more susceptible to breakdown and burning. When the cable is dragged, the relative friction between the cable and the uneven surface can easily scratch the wear-resistant layer or even break the wear-resistant layer and scratch the wire core. Summary of the invention

[0004] The present invention provides a scratch-resistant photovoltaic cable and a production process thereof, which solves the problems mentioned in the above background technology.

[0005] To achieve the above object, the present invention is implemented by the following technical scheme: a scratch-resistant photovoltaic cable, comprising a copper conductor, wherein the number of the copper conductors is multiple, and the multiple copper conductors are hinged into copper strands, and the surface of the copper strands is fixedly connected with a polyethylene tube, and further comprising:

[0006] A heat-conducting mechanism, which is sleeved on the outer surface of the polyethylene tube, and a heat-conducting insulating coating is poured between the inner side of the heat-conducting mechanism and the polyethylene tube, and the heat-conducting mechanism is used for heat transfer between the copper strands, the polyethylene tube and the cooling gas;

[0007] A joint mechanism, the joint mechanism is fixedly mounted on the surface of the polyethylene tube near the end surface, a heat shrink tube and an outer sleeve are fixedly connected to the surface of the joint mechanism, and the joint mechanism is used to quickly connect the photovoltaic cable to the connector and allow cooling gas to pass;

[0008] The friction reduction mechanism is fixedly installed on the outer surface of the outer sleeve, and is used to reduce the friction resistance between the outer sleeve and the ground surface and protect the surface of the outer sleeve. The three polyethylene tubes are evenly distributed inside the special-shaped heat-conducting tube, and the filling hemp rope is placed at the center of the special-shaped heat-conducting tube, which can effectively avoid the mutual squeezing and eccentric deformation between the polyethylene tubes. The special-shaped heat-conducting tube is a tubular structure injection-molded by silicone material. The barrier of the filling hemp rope increases the tensile strength of the cable and prevents the three copper strands from interfering with each other.

[0009] The friction reduction mechanism comprises a collar, the surface of which is sleeved on the outer surface of the outer sleeve, a pin penetrates the surface of the collar, a support body is fixedly connected to the middle position of the collar surface, and a rotating assembly is rotatably connected to the surface of the support body.

[0010] Preferably, the end face of the pin passes through the outer sleeve and extends to the position between the outer sleeve and the heat shrink tube. The position between the outer sleeve and the heat shrink tube is poured with flame retardant coating. The inner side surface of the support body is slidably connected with a metal cage. The friction resistance between the uneven surface and the photovoltaic cable is too large, which can easily cause the photovoltaic cable to be scratched or even broken. In this device, a plurality of rings are evenly spaced on the outer surface of the outer sleeve, and the metal cage passes through the support body. The hot melt metal is spot welded to the inside of the spot welding groove, so that the metal cage and the support body are quickly and firmly connected. The tip of the countersunk pin passes through the outer sleeve to the inside thereof, due to the extension of the extension tube.

[0011] Preferably, the friction reduction mechanism further comprises a spiral bar, the end face of which is fixedly mounted on the outer surface of the metal cage, and a spot welding groove is provided on the surface of the support body near the metal cage.

[0012] Preferably, the rotating assembly comprises a rotating shaft, the rotating shaft is slidably mounted on the inner side surface of the support body, a roller body is fixedly connected to the middle position of the rotating shaft surface, and the surface of the roller body extends to the outside of the support body.

[0013] Preferably, the rotating assembly also includes a thermal expansion ring, the inner side surface of the thermal expansion ring is slidably connected to the surface of the rotating shaft, the rotating shaft is connected to a fixed plate near the end surface by welding, and the inner side surface of the fixed plate is provided with a guide groove. The device is provided with a plurality of roller bodies. When the roller bodies are installed on the surface of the support body, due to their small size and large number, the use of bolt fixing will result in high cable production costs. In the device, high-temperature molten metal is dripped onto the inner side surface of the fixed plate, and the high-temperature molten metal is guided to the thermal expansion ring by the guidance of the guide groove. The thermal expansion ring is thermally expanded to hinder the metal melt from flowing to the support body, and the thermal expansion ring and the fixed plate are quickly engaged, and the rotating shaft will not be bonded by the high-temperature molten metal and cannot rotate.

[0014] Preferably, the heat-conducting mechanism comprises a special-shaped heat-conducting pipe, the special-shaped heat-conducting pipe is sleeved on the outer surface of the polyethylene pipe, and a filling hemp rope is fixedly connected to the middle position of the inner side surface of the special-shaped heat-conducting pipe.

[0015] Preferably, the heat conduction mechanism further comprises a hot melt adhesive sheet, which is fixedly mounted on the outer surface of the special-shaped heat conduction tube, the outer surface of the hot melt adhesive sheet is fixedly connected to an airflow component, and the outer surface of the airflow component is fixedly mounted on the inner side of the heat shrink tube.

[0016] Preferably, the airflow component includes a frame body, an inner groove is provided on the inner side surface of the frame body, the inner side surface of the frame body is fixedly mounted on the outer surface of the hot-melt film near the inner groove, the inner side surface of the frame body is fixedly connected with an inner convex body, the plastic strip is made of plastic material, a plurality of frame bodies are heat shrunk and limited by heat shrink tubes, an airflow channel is formed between the plurality of frame bodies, thereby facilitating the flow of cooling gas, a plurality of airflow holes are provided on the surface of the frame body, the airflow holes penetrate the frame body, and promote the cooling gas to flow through the frame body to quickly take away the heat of the copper wire, and the plurality of frame bodies are fixed and pulled with plastic strips, which can avoid the frame bodies from being torn due to excessive distance between them when the photovoltaic cable is bent.

[0017] Preferably, the airflow component further comprises a plastic strip, the surface of the plastic strip is fixedly mounted on the inner side of the frame body, the outer surface of the frame body is fixedly mounted on the inner side of the heat shrink tube, and the surface of the frame body is provided with airflow holes.

[0018] Preferably, the joining mechanism includes a joining tube, an extension tube is fixedly connected to the surface of the joining tube near the edge, and an inner folding tube is fixedly connected to the side of the joining tube away from the extension tube. The filling and shaping of the thermally conductive insulating glue makes the three polyethylene tubes easy to bend during use and not prone to eccentric pressure loss. At the same time, the thermally conductive insulating glue makes it possible to quickly reduce the heat of the copper wire. The special-shaped structure of the special-shaped heat-conducting tube makes it possible to evenly fill the insulating thermally conductive coating on the outer surface of the polyethylene tube, and the outer surface of the special-shaped heat-conducting tube is in full contact with the cooling gas, thereby improving the cooling efficiency.

[0019] Preferably, a bolt is fixedly connected between the inner folding cylinder and the engaging cylinder, a thread is provided on the surface of the inner folding cylinder, and a flow guide tube is fixedly connected to the surface of the engaging cylinder.

[0020] A production process for a scratch-resistant photovoltaic cable comprises the following steps:

[0021] Step 1, wire core manufacturing, at room temperature, drawing the copper rod into copper wire, heating and keeping the copper wire warm, and then naturally cooling the copper wire, twisting the copper wire by twisting multiple single wires to form a copper stranded wire, and using a traction machine to pull the copper stranded wire to be coated with polyethylene inside the injection molding extruder to complete the preparation of the conductor wire core;

[0022] Step 2: The heat-conducting structure is formed. The hot-melt silicone material flows through the special-shaped die to cool and shape into a special-shaped heat-conducting tube. The conductor core is inserted into the interior of the special-shaped heat-conducting tube. The filling hemp rope is placed in the middle of the inner side of the special-shaped heat-conducting tube. The heat-conducting insulating coating is poured into the interior of the special-shaped heat-conducting tube to cool and shape. The shaping structure passes through multiple airflow components. The hot-melt adhesive sheet is slid into the position between the airflow component and the special-shaped heat-conducting tube. Then, the structure is placed in a heating furnace. The temperature is controlled to melt the hot-melt adhesive sheet. Multiple airflow components are quickly bonded to the outer surface of the special-shaped heat-conducting tube to achieve shaping of the heat-conducting structure.

[0023] Step 3: Heat shrink wrapping, the end face of the conductor core passes through the hole on the inner side of the joint tube, the end face of the heat shrink tube is extended to the inner side of the extension tube, the structure is heated as a whole so that the heat shrink tube is tightly joined to the outer surface of the airflow component, the end face of the outer sleeve is slid to the outer surface of the extension tube, the surface of the outer sleeve is provided with a pouring hole, the flame retardant glue is poured into the inside of the pouring hole, after the flame retardant coating is fixed, the inner folding tube and the joint tube are joined and fixed by bolts;

[0024] Step 4: Install the anti-scratch structure. The internal structure of the rotating assembly is fixed by spot welding. The rotating assembly is fixed in the middle of the surface of the ring by ring welding. After the metal cage passes through the support body, it is quickly fixed to the support body through the spot welding groove. The pin is inserted into the interior of the outer sleeve. The injection molding of the flame retardant coating allows the pin, the ring and the outer sleeve to be quickly and firmly connected.

[0025] The present invention provides a scratch-resistant photovoltaic cable and a production process thereof, which has the following beneficial effects:

[0026] 1. The scratch-resistant photovoltaic cable and its production process, the temperature of the copper wire increases during use, and the heat is transferred to the airflow component through the thermal insulation coating and the special-shaped heat-conducting tube. Multiple airflow components are evenly distributed on the outside of the special-shaped heat-conducting tube, so that an airflow channel is formed between the special-shaped heat-conducting tube and the heat shrinkable tube. The cooling gas flows from one end of the polyethylene tube to the other end, thereby quickly reducing the heat on the copper wire. In this process, the cooling structure is inside the cable, which effectively improves the heat transfer efficiency and solves the problem that the protective structure will reduce the heat dissipation efficiency of the cable, making the cable more susceptible to breakdown and burning.

[0027] 2. The scratch-resistant photovoltaic cable and its production process, the elastic support and pulling of the plastic strip form an air flow channel inside the photovoltaic cable, and at the same time make the photovoltaic cable have better tensile and bending resistance. The hot-melt adhesive sheet hot-melts the inner side of the frame body with the special-shaped heat pipe. The connection method of multiple frame bodies cooperates with the pulling of the plastic strip, so that the tensile resistance of the photovoltaic cable will not be reduced and the photovoltaic cable will be more bendable when used.

[0028] 3. The scratch-resistant photovoltaic cable and its production process, the coupling tube is arranged on the end face of the photovoltaic cable, the extension of the extension tube forms a gap filled with flame-retardant paint between the heat shrink tube and the outer sleeve, the surface of the outer sleeve is provided with a filling hole, when the flame-retardant paint is poured and formed, the extension tube is tightly joined with the heat shrink tube and the outer sleeve, the inner folding tube and the connector are quickly connected by threads, the guide tube transports cooling gas to the outer surface of the special-shaped heat-conducting tube, the airflow component is evenly spaced and supported so that the cooling gas can flow inside the airflow channel, thereby making the heat dissipation efficiency of the photovoltaic cable higher.

[0029] 4. The scratch-resistant photovoltaic cable and its production process, when the photovoltaic cable is subjected to a pulling force, the roller body rolls to reduce the friction of the ground surface. When the photovoltaic cable is dragged, the surface of the roller body moves relative to the ground surface, and the roller body converts the sliding friction into rolling friction, thereby effectively reducing the dragging resistance of the photovoltaic cable, solving the problem that when the cable is dragged, the relative friction between the cable and the uneven ground surface easily scratches the wear-resistant layer, and even breaks the wear-resistant layer and then scratches the wire core.

[0030] 5. The scratch-resistant photovoltaic cable and its production process form a filling gap between the outer sleeve and the heat shrink tube. After the flame-retardant coating is filled between the outer sleeve and the heat shrink tube, the flame-retardant coating is cooled and formed to ensure a stable and sealed connection between the countersunk pin and the outer sleeve. Spiral strips are welded between multiple metal cages. The setting of the spiral strips can block and protect the outer sleeve, thereby effectively improving the production efficiency of the photovoltaic cable. The bending characteristics of the spiral strips and the support of multiple rings make the photovoltaic cable more bendable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a flow chart of the production process of the scratch-resistant photovoltaic cable of the present invention;

[0032] Figure 2 A three-dimensional diagram of the entire scratch-resistant photovoltaic cable of the present invention;

[0033] Figure 3 A three-dimensional diagram of the interior of the scratch-resistant photovoltaic cable of the present invention;

[0034] Figure 4 This is a schematic diagram of the partial structure of the scratch-resistant photovoltaic cable of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the heat conduction mechanism of the present invention;

[0036] Figure 6 It is a structural schematic diagram of the airflow component of the present invention;

[0037] Figure 7 It is a structural connection diagram of the whole joint mechanism of the present invention;

[0038] Figure 8 It is a structural exploded view of the whole joint mechanism of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the friction reduction mechanism of the present invention;

[0040] Fig.10 It is a schematic structural diagram of the rotating assembly of the present invention.

[0041] In the figure: 1. copper wire; 2. polyethylene tube; 3. heat conduction mechanism; 31. special-shaped heat conduction tube; 32. filling hemp rope; 33. hot melt adhesive sheet; 34. air flow assembly; 341. skeleton body; 342. inner groove; 343. inner convex body; 344. plastic strip; 345. air flow hole; 4. joining mechanism; 41. joining tube; 42. extension tube; 43. guide tube; 44. inner folding tube; 45. bolt; 5. heat shrink tube; 6. outer sleeve; 7. friction reduction mechanism; 71. collar; 72. pin; 73. support body; 74. metal cage; 75. spot welding groove; 76. spiral strip; 77. rotating assembly; 771. rotating shaft; 772. roller body; 773. heat expansion ring; 774. fixing plate; 775. guide groove. DETAILED DESCRIPTION

[0042] 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.

[0043] First embodiment: Figure 1-Figure 5 As shown, the present invention provides a technical solution: a scratch-resistant photovoltaic cable, comprising a copper conductor 1, wherein the number of the copper conductors 1 is multiple, and the multiple copper conductors 1 are hinged into copper strands, and a polyethylene tube 2 is fixedly connected to the surface of the copper strands, and further comprising:

[0044] The heat conducting mechanism 3 is sleeved on the outer surface of the polyethylene tube 2, and the position between the inner side of the heat conducting mechanism 3 and the polyethylene tube 2 is filled with heat conducting insulating paint. The heat conducting mechanism 3 is used for heat transfer between the copper stranded wire, the polyethylene tube 2 and the cooling gas;

[0045] A joining mechanism 4, which is fixedly mounted on the surface of the polyethylene tube 2 near the end surface, and a heat shrink tube 5 and an outer sleeve 6 are fixedly connected to the surface of the joining mechanism 4. The joining mechanism 4 is used to quickly connect the photovoltaic cable to the connector and to allow cooling gas to pass;

[0046] The friction reducing mechanism 7 is fixedly mounted on the outer surface of the outer sleeve 6. The friction reducing mechanism 7 is used to reduce the friction resistance between the outer sleeve 6 and the ground surface and to protect the surface of the outer sleeve 6;

[0047] The heat-conducting mechanism 3 includes a special-shaped heat-conducting tube 31, which is sleeved on the outer surface of the polyethylene tube 2. A filling hemp rope 32 is fixedly connected to the middle position of the inner side of the special-shaped heat-conducting tube 31. The heat-conducting mechanism 3 also includes a hot-melt adhesive sheet 33, which is fixedly installed on the outer surface of the special-shaped heat-conducting tube 31. The outer surface of the hot-melt adhesive sheet 33 is fixedly connected to an airflow component 34, and the outer surface of the airflow component 34 is fixedly installed on the inner side of the heat shrink tube 5.

[0048] When in use, the three polyethylene tubes 2 are evenly distributed inside the special-shaped heat-conducting tube 31, and the filling hemp rope 32 is placed at the center of the special-shaped heat-conducting tube 31, which can effectively avoid the mutual squeezing and eccentric deformation between the polyethylene tubes 2. The special-shaped heat-conducting tube 31 is a tubular structure injection-molded by silicone material. The barrier of the filling hemp rope 32 increases the tensile strength of the cable and prevents the three copper strands from interfering with each other. The temperature of the copper wire 1 increases during use, and the heat passes through the thermal insulating glue and the special-shaped heat-conducting tube 31 to the airflow component 34. Multiple airflow components 34 are evenly distributed on the outside of the special-shaped heat-conducting tube 31, so that an airflow channel is formed between the special-shaped heat-conducting tube 31 and the heat shrink tube 5, and the cooling gas flows from one end of the polyethylene tube 2 to the other end to be discharged, thereby quickly reducing the copper wire 1. In this process, the cooling structure is inside the cable, which effectively improves the heat transfer efficiency, and solves the problem that the protective structure will cause the heat dissipation efficiency of the cable to decrease, making the cable more susceptible to breakdown and burning.

[0049] Second embodiment: Figure 5 , Figure 6 As shown, the airflow component 34 includes a frame body 341, the inner side surface of the frame body 341 is provided with an inner groove 342, the inner side surface of the frame body 341 is fixedly installed on the outer surface of the hot melt film 33 near the inner groove 342, the inner side surface of the frame body 341 is fixedly connected with an inner protrusion 343, the airflow component 34 also includes a plastic strip 344, the surface of the plastic strip 344 is fixedly installed on the inner side surface of the frame body 341, the outer surface of the frame body 341 is fixedly installed on the inner side surface of the heat shrink tube 5, and the surface of the frame body 341 is provided with airflow holes 345.

[0050] When in use, the plastic strip 344 is made of plastic material, and the multiple frame bodies 341 are heat-shrunk and pressed to a fixed position by the heat shrink tube 5. The positions between the multiple frame bodies 341 form an air flow channel, which is convenient for the flow of cooling gas. The surface of the frame body 341 is provided with multiple air flow holes 345, and the air flow holes 345 penetrate the frame body 341 to promote the cooling gas to flow through the frame body 341 and quickly take away the heat of the copper wire 1. The multiple frame bodies 341 are fixed and pulled by the plastic strip 344, which can avoid the photovoltaic cable being torn due to the excessive distance between the frame bodies 341 when bending. The elastic support and pulling of the plastic strip 344 form an air flow channel inside the photovoltaic cable, and at the same time make the photovoltaic cable have better tensile and bending resistance. The hot melt adhesive sheet 33 heat-melts the inner side of the frame body 341 with the special-shaped heat conducting tube 31. The connection method of the multiple frame bodies 341 cooperates with the pulling of the plastic strip 344, so that the tensile resistance of the photovoltaic cable will not be reduced and the photovoltaic cable will be more bendable when in use.

[0051] The third embodiment: Figure 5-Figure 8 As shown, the special-shaped heat-conducting tube 31 is sleeved on the outer surface of the polyethylene tube 2, and a filling hemp rope 32 is fixedly connected to the middle position of the inner side of the special-shaped heat-conducting tube 31. The heat-conducting mechanism 3 also includes a hot-melt adhesive sheet 33, which is fixedly installed on the outer surface of the special-shaped heat-conducting tube 31. The outer surface of the hot-melt adhesive sheet 33 is fixedly connected to an airflow component 34, and the outer surface of the airflow component 34 is fixedly installed on the inner side of the heat shrink tube 5.

[0052] The joining mechanism 4 includes a joining cylinder 41, an extension tube 42 is fixedly connected to the surface of the joining cylinder 41 near the edge, an inner folding cylinder 44 is fixedly connected to the side of the joining cylinder 41 away from the extension tube 42, a bolt 45 is fixedly connected to the position between the inner folding cylinder 44 and the joining cylinder 41, a thread is provided on the surface of the inner folding cylinder 44, and a guide tube 43 is fixedly connected to the surface of the joining cylinder 41.

[0053] During use, the filling and shaping of the thermally conductive insulating glue makes the three polyethylene tubes 2 easy to bend and not prone to eccentric pressure loss during use. At the same time, the thermally conductive insulating glue can quickly reduce the heat of the copper wire 1. The special-shaped structure of the special-shaped heat-conducting tube 31 enables the insulating thermally conductive paint to be evenly filled on the outer surface of the polyethylene tube 2, and the outer surface of the special-shaped heat-conducting tube 31 is in full contact with the cooling gas, thereby improving the cooling efficiency. The coupling tube 41 is arranged on the end face of the photovoltaic cable, and the extension tube 42 is extended to form a flame-retardant paint filling gap between the heat shrinkable tube 5 and the outer sleeve 6. The surface of the outer sleeve 6 is provided with an injection hole. After the flame-retardant paint is injected and shaped, the extension tube 42 is tightly joined with the heat shrinkable tube 5 and the outer sleeve 6. The inner folding tube 44 is quickly connected to the connector by a thread. The guide tube 43 transports cooling gas to the outer surface of the special-shaped heat-conducting tube 31. The airflow component 34 is evenly spaced and supported so that the cooling gas can flow inside the airflow channel, thereby making the heat dissipation efficiency of the photovoltaic cable higher.

[0054] Fourth embodiment: Fig. 9 , Fig.10 As shown, the friction reduction mechanism 7 includes a collar 71, the surface of the collar 71 is sleeved on the outer surface of the outer sleeve 6, a pin 72 is passed through the surface of the collar 71, a support body 73 is fixedly connected to the middle position of the surface of the collar 71, a rotating assembly 77 is rotatably connected to the surface of the support body 73, the end face of the pin 72 passes through the outer sleeve 6 and extends to the position between the outer sleeve 6 and the heat shrink tube 5, the position between the outer sleeve 6 and the heat shrink tube 5 is infused with a flame retardant coating, the inner side surface of the support body 73 is slidably connected to a metal cage 74, the friction reduction mechanism 7 also includes a spiral bar 76, the end face of the spiral bar 76 is fixedly mounted on the outer surface of the metal cage 74, and a spot welding groove 75 is provided on the surface of the support body 73 near the metal cage 74;

[0055] The rotating assembly 77 includes a rotating shaft 771, which is slidably mounted on the inner side of the support body 73. A roller body 772 is fixedly connected to the middle position of the surface of the rotating shaft 771, and the surface of the roller body 772 extends to the outside of the support body 73. The rotating assembly 77 also includes a heat expansion ring 773, and the inner side of the heat expansion ring 773 is slidably connected to the surface of the rotating shaft 771. The rotating shaft 771 is connected to a fixed plate 774 near the end face by welding, and a guide groove 775 is provided on the inner side of the fixed plate 774.

[0056] When in use, the device is provided with a plurality of roller bodies 772. When the roller bodies 772 are mounted on the surface of the support body 73, due to their small size and large number, the use of bolt fixing will result in a high cable production cost. In the device, high-temperature molten metal is dripped onto the inner side of the fixing plate 774, and the guide groove 775 guides the high-temperature molten metal to the heat expansion ring 773. The heat expansion ring 773 is expanded by heat to prevent the metal melt from flowing to the support body 73, and the heat expansion ring 773 and the fixing plate 774 are quickly connected. The rotating shaft 771 will not be bonded by the high-temperature metal melt and cannot rotate. When the photovoltaic cable is subjected to a pulling force, the roller body 772 rolls to reduce the friction with the ground surface. When the photovoltaic cable is dragged, the surface of the roller body 772 moves relative to the ground surface. The roller body 772 converts the sliding friction into rolling friction, thereby effectively reducing the dragging resistance of the photovoltaic cable. This solves the problem that when the cable is dragged, the relative friction between the cable and the uneven ground surface easily scratches the wear-resistant layer, or even breaks the wear-resistant layer and then scratches the wire core.

[0057] Fifth embodiment: Figure 8 , Fig. 9As shown, an extension tube 42 is fixedly connected to a position near the edge of the surface of the coupling tube 41, an inner folding tube 44 is fixedly connected to a side of the coupling tube 41 away from the extension tube 42, a bolt 45 is fixedly connected to a position between the inner folding tube 44 and the coupling tube 41, a thread is provided on the surface of the inner folding tube 44, and a guide tube 43 is fixedly connected to the surface of the coupling tube 41;

[0058] The end face of the pin 72 passes through the outer sleeve 6 and extends to the position between the outer sleeve 6 and the heat shrink tube 5. The position between the outer sleeve 6 and the heat shrink tube 5 is injected with flame retardant coating. The inner side surface of the support body 73 is slidably connected to the metal cage 74. The friction reduction mechanism 7 also includes a spiral bar 76. The end face of the spiral bar 76 is fixedly installed on the outer surface of the metal cage 74. A spot welding groove 75 is opened on the surface of the support body 73 near the metal cage 74.

[0059] When in use, the friction resistance between the uneven surface and the photovoltaic cable is too large, which can easily cause the photovoltaic cable to be scratched or even cut. In the device, multiple rings 71 are evenly spaced and sleeved on the outer surface of the outer sleeve 6. The metal cage 74 passes through the support body 73, and the hot melt metal is spot welded to the inside of the spot welding groove 75, so that the metal cage 74 and the support body 73 are quickly and firmly connected. The tip of the countersunk pin 72 passes through the outer sleeve 6 to the inside thereof. Due to the extension of the extension tube 42, a filling gap is formed between the outer sleeve 6 and the heat shrinkable tube 5. After the flame retardant coating is filled between the outer sleeve 6 and the heat shrinkable tube 5, the flame retardant coating is cooled and formed, so that the countersunk pin 72 and the outer sleeve 6 are firmly and sealed. Spiral strips 76 are welded between the multiple metal cages 74. The setting of the spiral strips 76 can block and protect the outer sleeve 6, thereby effectively improving the production efficiency of the photovoltaic cable. The bending characteristics of the spiral strips 76 and the support of multiple rings 71 make the photovoltaic cable have better bendability.

[0060] Sixth embodiment: Figure 1-Figure 10 As shown, a production process for a scratch-resistant photovoltaic cable comprises the following steps:

[0061] Step 1, wire core manufacturing, at room temperature, drawing the copper rod into copper wire, heating and keeping the copper wire warm, and then naturally cooling the copper wire, twisting the copper wire by twisting multiple single wires to form a copper stranded wire, and using a traction machine to pull the copper stranded wire to be coated with polyethylene inside the injection molding extruder to complete the preparation of the conductor wire core;

[0062] Step 2: forming the heat-conducting structure. The hot-melt silicone material flows through the special-shaped die to cool and shape into a special-shaped heat-conducting tube 31. The conductor core is inserted into the interior of the special-shaped heat-conducting tube 31. The filling hemp rope 32 is placed in the middle of the inner side of the special-shaped heat-conducting tube 31. The heat-conducting insulating paint is poured into the interior of the special-shaped heat-conducting tube 31 to cool and shape it. The shaping structure passes through multiple airflow components 34. The hot-melt adhesive sheet 33 is slid into the position between the airflow component 34 and the special-shaped heat-conducting tube 31. Then, the structure is placed in a heating furnace, and the temperature is controlled to make the hot-melt adhesive sheet 33 melt. Multiple airflow components 34 are quickly bonded to the outer surface of the special-shaped heat-conducting tube 31 to achieve shaping of the heat-conducting structure.

[0063] Step 3: Heat shrink wrapping. The end face of the conductor core passes through the hole on the inner side of the joint tube 41. The end face of the heat shrink tube 5 is extended to the inner side of the extension tube 42. The entire structure is heated so that the heat shrink tube 5 is tightly joined to the outer surface of the airflow component 34. The end face of the outer sleeve 6 is slid to the outer surface of the extension tube 42. The surface of the outer sleeve 6 is provided with a pouring hole. The flame retardant coating is poured into the inside of the pouring hole. After the flame retardant coating is fixed, the inner folding tube 44 and the joint tube 41 are joined and fixed by bolts 45.

[0064] Step 4: Install the anti-scratch structure. The internal structure of the rotating component 77 is fixed by spot welding. The rotating component 77 is fixedly installed in the middle position of the surface of the ring 71 by ring welding. The metal cage 74 passes through the support body 73 and is quickly fixed to the support body 73 through the spot welding groove 75. The pin 72 is inserted into the interior of the outer sleeve 6. The injection molding of the flame retardant coating allows the pin 72, the ring 71 and the outer sleeve 6 to be quickly and firmly connected.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by... does not exclude the existence of other identical elements in the process, method, article or device including the element".

Claims

1. A scratch-resistant photovoltaic cable, comprising a copper conductor (1), characterized in that: There are multiple copper conductors (1), and the multiple copper conductors (1) are hinged into copper stranded wires, and a polyethylene tube (2) is fixedly connected to the surface of the copper stranded wire. The invention also includes: A heat conducting mechanism (3), the heat conducting mechanism (3) being sleeved on the outer surface of the polyethylene tube (2), a heat conducting insulating coating being poured into the position between the inner side surface of the heat conducting mechanism (3) and the polyethylene tube (2), the heat conducting mechanism (3) being used for heat transfer between the copper stranded wire, the polyethylene tube (2) and the cooling gas; A joining mechanism (4), the joining mechanism (4) being fixedly mounted on a surface of the polyethylene tube (2) at a position close to an end surface, a heat shrink tube (5) and an outer sleeve (6) being fixedly connected to the surface of the joining mechanism (4), the joining mechanism (4) being used for quickly connecting the photovoltaic cable to the connector and for allowing cooling gas to pass through; A friction reduction mechanism (7), the friction reduction mechanism (7) being fixedly mounted on the outer surface of the outer sleeve (6), the friction reduction mechanism (7) being used to reduce the friction resistance between the outer sleeve (6) and the ground surface and to protect the surface of the outer sleeve (6); The friction reducing mechanism (7) comprises a collar (71), the surface of the collar (71) being sleeved on the outer surface of the outer sleeve (6), a pin (72) penetrating the surface of the collar (71), a support body (73) being fixedly connected to the middle of the surface of the collar (71), and a rotating assembly (77) being rotatably connected to the surface of the support body (73).

2. The scratch-resistant photovoltaic cable according to claim 1, characterized in that: The end surface of the pin (72) passes through the outer sleeve (6) and extends to a position between the outer sleeve (6) and the heat shrink tube (5); the position between the outer sleeve (6) and the heat shrink tube (5) is injected with a flame retardant coating; and the inner side surface of the support body (73) is slidably connected to a metal cage (74).

3. The scratch-resistant photovoltaic cable according to claim 2, characterized in that: The friction reduction mechanism (7) further comprises a spiral strip (76), the end surface of which is fixedly mounted on the outer surface of the metal cage (74), and a spot welding groove (75) is provided on the surface of the support body (73) at a position close to the metal cage (74).

4. The scratch-resistant photovoltaic cable according to claim 1, characterized in that: The heat conduction mechanism (3) comprises a special-shaped heat conduction pipe (31), the special-shaped heat conduction pipe (31) being sleeved on the outer surface of the polyethylene pipe (2), and a filling hemp rope (32) being fixedly connected to the middle position of the inner side surface of the special-shaped heat conduction pipe (31).

5. The scratch-resistant photovoltaic cable according to claim 4, characterized in that: The heat-conducting mechanism (3) further comprises a hot-melt adhesive sheet (33), wherein the hot-melt adhesive sheet (33) is fixedly mounted on the outer surface of the special-shaped heat-conducting tube (31), the outer surface of the hot-melt adhesive sheet (33) is fixedly connected to an airflow component (34), and the outer surface of the airflow component (34) is fixedly mounted on the inner side surface of the heat-shrinkable tube (5).

6. The scratch-resistant photovoltaic cable according to claim 5, characterized in that: The airflow component (34) comprises a frame body (341), the inner side surface of the frame body (341) is provided with an inner groove (342), the inner side surface of the frame body (341) is fixedly mounted on the outer surface of the hot melt adhesive sheet (33) at a position close to the inner groove (342), and the inner side surface of the frame body (341) is fixedly connected with an inner convex body (343).

7. The scratch-resistant photovoltaic cable according to claim 6, characterized in that: The airflow component (34) further comprises a plastic strip (344), the surface of the plastic strip (344) being fixedly mounted on the inner side of the frame body (341), the outer surface of the frame body (341) being fixedly mounted on the inner side of the heat shrink tube (5), and the surface of the frame body (341) being provided with airflow holes (345).

8. The scratch-resistant photovoltaic cable according to claim 1, characterized in that: The joining mechanism (4) comprises a joining cylinder (41), an extension tube (42) being fixedly connected to a position on the surface of the joining cylinder (41) close to the edge, and an inner folding cylinder (44) being fixedly connected to a side of the joining cylinder (41) away from the extension tube (42).

9. The scratch-resistant photovoltaic cable according to claim 8, characterized in that: A bolt (45) is fixedly connected between the inner folding cylinder (44) and the connecting cylinder (41); a thread is provided on the surface of the inner folding cylinder (44); and a flow guide tube (43) is fixedly connected to the surface of the connecting cylinder (41).

10. A production process for scratch-resistant photovoltaic cables, characterized in that: The following steps are involved: Step 1, wire core manufacturing, at room temperature, drawing the copper rod into copper wire, heating and keeping the copper wire warm, and then naturally cooling the copper wire, twisting the copper wire by twisting multiple single wires to form a copper stranded wire, and using a traction machine to pull the copper stranded wire to be coated with polyethylene inside the injection molding extruder to complete the preparation of the conductor wire core; Step 2, forming the heat-conducting structure, the hot-melt silicone material flows through the special-shaped die to cool and shape into a special-shaped heat-conducting tube (31), the conductor core is inserted into the interior of the special-shaped heat-conducting tube (31), the filling hemp rope (32) is placed in the middle position of the inner side of the special-shaped heat-conducting tube (31), the heat-conducting insulating paint is poured into the interior of the special-shaped heat-conducting tube (31) to cool and shape, the shaping structure passes through multiple airflow components (34), the hot-melt adhesive sheet (33) is slid into the position between the airflow component (34) and the special-shaped heat-conducting tube (31), and then the structure is placed in a heating furnace, the temperature is controlled to make the hot-melt adhesive sheet (33) melt, and the multiple airflow components (34) are quickly bonded to the outer surface of the special-shaped heat-conducting tube (31), so as to achieve the shaping of the heat-conducting structure; Step 3: heat shrink wrapping, the end face of the conductor core passes through the hole on the inner side of the joint tube (41), the end face of the heat shrink tube (5) is extended to the inner side of the extension tube (42), the entire structure is heated so that the heat shrink tube (5) is tightly joined to the outer surface of the airflow component (34), the end face of the outer sleeve (6) is slid to the outer surface of the extension tube (42), the surface of the outer sleeve (6) is provided with a pouring hole, the flame retardant glue is poured into the inside of the pouring hole, after the flame retardant coating is fixed, the inner folding tube (44) and the joint tube (41) are joined and fixed by bolts (45); Step 4: Install the anti-scratch structure. The internal structure of the rotating assembly (77) is fixed by spot welding. The rotating assembly (77) is fixedly installed in the middle position of the surface of the ring (71) by ring welding. The metal cage (74) passes through the support body (73) and is then quickly fixed to the support body (73) through the spot welding groove (75). The pin (72) is inserted into the interior of the outer sleeve (6). The injection molding of the flame retardant coating allows the pin (72), the ring (71) and the outer sleeve (6) to be quickly and firmly connected.

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