A photovoltaic cable with high temperature resistance and long service life and its preparation method

Abstract

The invention discloses a photovoltaic cable that is resistant to high temperatures and has a long service life, and a preparation method thereof, and relates to the technical field of power cables. A Y-shaped plate is connected in the middle of the top ends of two adjacent curved plates, the Y-shaped plate is located in the gap between two adjacent conductors, a limiting groove is welded on the outside of a support sleeve and located in the middle of the two adjacent curved plates, a bending piece is connected between the inner side of the limiting groove and the tip of the adjacent Y-shaped plate, the tip of the Y-shaped plate is embedded in the adjacent limiting groove, and the inside of the rubber ring tube is filled with an internal flame retardant. When the cable burns, the expanded graphite expands, and the expanded graphite diffuses into the inside of the diffusion port. The silicone rubber layer is made of ceramic silicone rubber. After burning, the ceramic silicone rubber will quickly harden into a hard ceramic shell, so that the expanded graphite is tightly stacked between the ceramic shell and the outside of the conductor. The stacked expanded graphite carbon layers cooperate with the flame retardant plate to fully hinder the flame from spreading to the inside of the unburned cable, and the cable has a good flame retardant effect.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, in particular to a photovoltaic cable that is resistant to high temperatures and has a long service life, and a preparation method thereof. Background Art

[0002] Photovoltaic power generation technology, as a clean and renewable energy technology, has been rapidly developed and widely used in recent years. Photovoltaic power stations convert solar energy into electrical energy through photovoltaic modules. Photovoltaic cables are crucial connection components in photovoltaic systems. As an important transmission medium connecting photovoltaic modules with inverters, power grids and other equipment, the safety performance of photovoltaic cables is directly related to the stable operation of the entire system.

[0003] However, when existing photovoltaic cables encounter fire, the outer sheath decomposes or burns first due to the heat, losing its ability to secure the internal conductors. This creates gaps between the conductors, allowing flames to easily penetrate the cable interior, accelerating the burning of the entire cable and resulting in suboptimal flame retardancy. Furthermore, some photovoltaic cables lack mechanical strength and compressive strength. When subjected to external mechanical pressure, the internal conductors are prone to deformation, potentially affecting the cable's transmission stability and service life, posing a safety hazard. Summary of the Invention

[0004] The present invention provides a photovoltaic cable with high temperature resistance and long service life and a preparation method thereof, which can effectively solve the problems in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a photovoltaic cable with high temperature resistance and long service life, comprising four conductors, a flame retardant and pressure resistant component provided on the outer side of the conductor, and the flame retardant and pressure resistant component including a support sleeve;

[0006] The centers of the four conductors are filled with support sleeves, a plurality of the support sleeves are arranged at equal intervals, and four arc-shaped plates are welded at equal intervals on the outside of the support sleeves, and the arc-shaped plates are fitted with the outsides of adjacent conductors;

[0007] A Y-shaped plate is connected between the top ends of two adjacent arc-shaped plates. The Y-shaped plate is located in the gap between the two adjacent conductors. A limiting groove is welded outside the support sleeve and located between the two adjacent arc-shaped plates. A bending piece is connected between the inner side of the limiting groove and the tip of the adjacent Y-shaped plate. The tip of the Y-shaped plate is embedded in the adjacent limiting groove.

[0008] A rubber ring is embedded between two adjacent support sleeves and located at the center of the four conductors. The interior of the rubber ring is filled with internal flame retardant.

[0009] According to the above technical solution, a flame retardant plate is welded in the middle of the support sleeve, and two adjacent rubber ring cylinders are separated by the flame retardant plate.

[0010] According to the above technical solution, a fixing belt is wrapped around the outside of the rubber ring tube, connecting screws are welded at both ends of the fixing belt, the connecting screws are connected to the adjacent support sleeves through threaded holes, and an inner rubber rib is embedded in the middle of the rubber ring tube.

[0011] According to the above technical solution, a thermally conductive silicone pad is filled in the gap between two adjacent support sleeves and between two adjacent conductors, and the thermally conductive silicone pad is located outside the fixing belt.

[0012] According to the above technical solution, a fixing groove is opened on the outside of the thermal conductive silicone pad, a rubber tube is embedded in the fixing groove, the rubber tube is filled with external flame retardant, a number of diffusion ports are opened at equal intervals on the inside of the thermal conductive silicone pad, and the outside of the thermal conductive silicone pad is wrapped with a silicone rubber layer.

[0013] According to the above technical solution, a compression and bending resistant component is provided on the outside of the silicone rubber layer, and the compression and bending resistant component includes a semicircular groove;

[0014] A plurality of semicircular grooves are sleeved at equal intervals on the outside of the silicone rubber layer, six limit boxes are arranged inside the semicircular grooves, an M-shaped plate is connected between two adjacent limit boxes, the two ends of the M-shaped plate are respectively embedded in the adjacent limit boxes, a plurality of support springs are welded between the two ends of the M-shaped plate and the adjacent limit boxes, a support arc piece is welded on the top of the M-shaped plate, and elastic pieces are welded at both ends of the support arc piece;

[0015] A plurality of clamping joints are welded at equal intervals on both sides of the semicircular groove, an elastic tube is connected between two opposite clamping joints, a plurality of bending openings are opened at equal intervals on the outside of the elastic tube, and an outer rubber band is embedded in the elastic tube.

[0016] According to the above technical solution, docking ports are provided at both ends of the semicircular groove at the top, and docking joints are welded at both ends of the semicircular groove at the bottom, and the docking joints are embedded in adjacent docking ports.

[0017] According to the above technical solution, a plurality of clamping teeth are provided on the outer side of the clamping joint, and a plurality of clamping interfaces are provided at both ends of the elastic tube, and the clamping teeth are embedded in the adjacent clamping interfaces;

[0018] A filling sponge is wrapped in the middle of two semicircular grooves located on the outside of the elastic tube and in the same plane. A plurality of sleeve grooves are opened on the outside of the filling sponge, and a rubber band ring is sleeved between two adjacent sleeve grooves.

[0019] According to the above technical solution, the outer side of the filling sponge is wrapped with an inner sheath, the outer side of the inner sheath is wrapped with an armor tape, and the outer side of the armor tape is wrapped with an outer sheath.

[0020] According to the above technical solution, a method for preparing a photovoltaic cable that is resistant to high temperatures and has a long service life is provided, and a method and device for preparing a photovoltaic cable that is resistant to high temperatures and has a long service life are provided.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. It is equipped with a flame retardant and pressure-resistant component. The inside of the rubber ring is filled with an inner flame retardant, and the inside of the rubber tube is filled with an outer flame retardant. Both the inner and outer flame retardants are expanded graphite. When the flame contacts the expanded graphite, the expanded graphite expands, and the expanded graphite diffuses into the inside of the diffusion port. The outside of the thermal conductive silicone pad is wrapped with a silicone rubber layer. The silicone rubber is made of ceramic silicone rubber. After burning, the ceramic silicone rubber will quickly harden into a hard ceramic shell. The ceramic shell can limit the expanded graphite, so that the expanded graphite is tightly stacked between the ceramic shell and the outside of the conductor. The flame retardant plate can block the flame. The stacked layers of expanded graphite carbon layers cooperate with the flame retardant plate to fully prevent the flame from spreading to the inside of the unburned cable, and the cable has a good flame retardant effect.

[0023] The inner rubber band is made of elastic rubber, which can improve the bending resistance of the cable. A thermal conductive silicone pad is set inside the cable. When the cable is operating normally, the heat generated by the conductor can be quickly transferred to the thermal conductive silicone pad, and the cable has good heat dissipation capacity.

[0024] The supporting sleeve, curved plate, Y-shaped plate, limiting groove, bending piece, flame retardant plate, connecting screw and fixing belt are all made of iron alloy. The curved plate supports each conductor separately. When the cable is subjected to external pressure, it can prevent the conductors from twisting, and the cable has strong anti-torsion ability.

[0025] When the cable is subjected to external force, the curved plate squeezes the Y-shaped plate. Under the limitation of the limiting groove, after the Y-shaped plate is squeezed, the tip of the Y-shaped plate squeezes the bending piece. The curved plate, Y-shaped plate and bending piece are all elastic and can store external force, so that most of the external force acts on the supporting sleeve, curved plate, Y-shaped plate and bending piece, which fully protects the conductor and enhances the pressure resistance of the cable, making the cable more resistant to pressure.

[0026] 2. It is equipped with a pressure-resistant and bending-resistant component. When the cable is subjected to external pressure, the external pressure will first act on the supporting arc piece, and the pressure is transmitted to the M-shaped plate. The M-shaped plate is elastically deformed under the force, and the supporting springs are squeezed at both ends of the M-shaped plate to guide the external pressure to the limit box. In addition, elastic sheets are provided at both ends of the supporting arc piece. The elastic sheets are elastically deformed under the force and guide the external pressure to the semicircular groove. When the external force is withdrawn, the supporting spring, M-shaped plate and elastic sheet rebound to release elastic energy, further enhancing the compressive resistance of the cable.

[0027] The elastic tube is made of iron, and the bending opening provides bending space for the cable. The connection position of the bending opening is an arc-shaped iron sheet with good elasticity. An outer rubber band is embedded inside the elastic tube. When the cable is bent by external force, the arc-shaped iron sheet at the connection position of the outer rubber band and the bending opening bends. When the external force is removed, the arc-shaped iron sheet at the connection position of the outer rubber band and the bending opening rebounds, further improving the bending resistance of the cable.

[0028] When the elastic tube is installed, when the card interface is aligned with the card tooth, the card tooth can be embedded in the card interface, and the two adjacent semicircular grooves are connected through the docking joint and the docking interface. The components inside the cable are all modularly designed, which is easy and quick to install. When the flame on the cable is extinguished, it is convenient to repair the cable.

[0029] To sum up, in the compression and bending resistant components, the support spring, M-shaped plate and elastic sheet enhance the compression resistance of the outer side of the cable. In the flame retardant and compression resistant components, the support sleeve, arc plate, Y-shaped plate, bending sheet and flame retardant plate enhance the compression resistance of the inner side of the cable. The two components work together to make the overall compression resistance of the cable stronger. In addition, the rubber ring tube, rubber tube, inner sheath and outer sheath of the cable are made of halogen-free flame retardant rubber, which has the characteristics of flame retardancy, low smoke and non-toxicity when burned, making the cable more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0031] In the attached figure:

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0033] Figure 2 is a cross-sectional view of a conductor of the present invention;

[0034] Figure 3 It is a schematic structural diagram of the flame retardant and pressure-resistant assembly of the present invention;

[0035] Figure 4 This is a schematic diagram of the installation structure of the thermal conductive silicone pad of the present invention;

[0036] Figure 5 This is a schematic diagram of the installation structure of the rubber tube of the present invention;

[0037] Figure 6 Schematic diagram of the installation structure of the curved plate of the present invention;

[0038] Figure 7 Schematic diagram of the installation structure of the fixing belt of the present invention;

[0039] Figure 8Schematic diagram of the installation structure of the bending piece of the present invention;

[0040] Figure 9 It is a schematic structural diagram of the compression and bending resistant assembly of the present invention;

[0041] Figure 10 This is a schematic diagram of the installation structure of the elastic tube of the present invention;

[0042] Figure 11 Schematic diagram of the installation structure of the supporting arc piece of the present invention;

[0043] Figure 12 This invention comes from Figure 11 A magnified view of area A;

[0044] Figure 13 Schematic diagram of the installation structure of the M-type plate of the present invention;

[0045] Numbers in the figure: 1, conductor;

[0046] 2. Flame-retardant and pressure-resistant assembly; 201. Support sleeve; 202. Curved plate; 203. Y-shaped plate; 204. Limiting groove; 205. Bending piece; 206. Flame-retardant plate; 207. Connecting screw; 208. Fixing belt; 209. Rubber ring; 210. Internal flame retardant; 211. Internal rubber rib; 212. Thermal conductive silicone pad; 213. Fixing groove; 214. Rubber tube; 215. External flame retardant; 216. Diffuser; 217. Silicone rubber layer;

[0047] 3. Compression and bending resistant components; 301. Semicircular groove; 302. Limit box; 303. M-shaped plate; 304. Support spring; 305. Support arc piece; 306. Elastic piece; 307. Docking port; 308. Docking joint; 309. Card joint; 310. Card teeth; 311. Elastic tube; 312. Card joint; 313. Bending mouth; 314. Outer rubber band; 315. Filling sponge; 316. Sleeve groove; 317. Rubber ring; 318. Inner sheath; 319. Armor belt; 320. Outer sheath. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0049] Example: Figure 1-13As shown, the present invention provides a photovoltaic cable with high temperature resistance and long service life and a preparation method thereof, comprising a conductor 1, four conductors 1 are provided, a flame retardant and pressure-resistant component 2 is provided on the outside of the conductor 1, and the flame retardant and pressure-resistant component 2 includes a support sleeve 201, an arc plate 202, a Y-shaped plate 203, a limiting groove 204, a bending piece 205, a flame retardant plate 206, a connecting spiral tube 207, a fixing belt 208, a rubber ring tube 209, an inner flame retardant 210, an inner rubber rib 211, a thermal conductive silicone pad 212, a fixing groove 213, a rubber tube 214, an outer flame retardant 215, a diffusion port 216 and a silicone rubber layer 217;

[0050] The centers of the four conductors 1 are filled with support sleeves 201. Multiple support sleeves 201 are arranged at equal intervals. Four arc-shaped plates 202 are welded at equal intervals on the outside of the support sleeves 201. The arc-shaped plates 202 fit the outsides of the adjacent conductors 1. The support sleeves 201, arc-shaped plates 202, Y-shaped plates 203, limiting grooves 204, bending pieces 205, flame-retardant plates 206, connecting spirals 207 and fixing belts 208 are all made of iron alloy.

[0051] A Y-shaped plate 203 is connected between the top ends of two adjacent curved plates 202. The Y-shaped plate 203 is located in the gap between two adjacent conductors 1. A limiting groove 204 is welded outside the support sleeve 201 and located between the two adjacent curved plates 202. A bending piece 205 is connected between the inner side of the limiting groove 204 and the tip of the adjacent Y-shaped plate 203. The tip of the Y-shaped plate 203 is embedded in the adjacent limiting groove 204.

[0052] A rubber ring tube 209 is embedded between two adjacent support sleeves 201 and in the center of the four conductors 1. The inside of the rubber ring tube 209 is filled with an internal flame retardant 210. A flame retardant plate 206 is welded in the middle of the support sleeve 201. The two adjacent rubber ring tubes 209 are separated by the flame retardant plate 206. The flame retardant plate 206 can block the flame. A fixing groove 213 is provided on the outside of the thermal conductive silicone pad 212. A rubber tube 214 is embedded in the fixing groove 213. The rubber tube 214 is filled with an external flame retardant 215. A number of diffusion ports 216 are provided at equal intervals on the inside of the thermal conductive silicone pad 212. The outside of the thermal conductive silicone pad 212 is wrapped with a silicone rubber layer 217. The internal flame retardant 210 and the external flame retardant The agent 215 is all expanded graphite. When the rubber ring 209 and the rubber tube 214 burn, the flame contacts the expanded graphite, and the volume of the expanded graphite expands to form a worm-like porous structure. The carbon layer formed by the expansion covers the surface of the conductor 1, effectively isolating the external oxygen and reducing the heat transfer to the conductor 1. The expanded graphite diffuses into the inside of the diffusion port 216. The silicone rubber layer 217 is made of ceramic silicone rubber. After burning, the ceramic silicone rubber will quickly harden into porcelain to form a hard ceramic shell. The ceramic shell can limit the expanded graphite, so that the expanded graphite is tightly wrapped around the outside of the conductor 1, and cooperates with the flame retardant plate 206 to block the flame, thereby preventing the flame from spreading to the inside of the unburned cable.

[0053] A fixing belt 208 is wrapped around the outside of the rubber ring tube 209, and connecting screws 207 are welded at both ends of the fixing belt 208. The connecting screws 207 are connected to the adjacent support sleeves 201 through threaded holes. The fixing belt 208 can fix the rubber ring tube 209 and prevent the two ends of the rubber ring tube 209 from being separated from the inside of the support sleeve 201 when the electric control is bent. An inner rubber rib 211 is embedded in the middle of the rubber ring tube 209. The inner rubber rib 211 is made of elastic rubber. When the cable is bent by external force, the inner rubber rib 211 also bends. When the external force is withdrawn, the inner rubber rib 211 rebounds, thereby improving the bending resistance of the cable.

[0054] The gap between two adjacent support sleeves 201 and between two adjacent conductors 1 is filled with a thermally conductive silicone pad 212. The thermally conductive silicone pad 212 is located outside the fixing belt 208. The thermally conductive silicone pad 212 is elastic. When the cable is impacted by external force, the thermally conductive silicone pad 212 can absorb the external force and enhance the compressive resistance of the cable. The thermally conductive silicone pad 212 has good thermal conductivity. When the cable is operating normally, the thermally conductive silicone pad 212 fits with the conductor 1. The heat generated by the operation of the conductor 1 can be quickly transferred to the thermally conductive silicone pad 212, and the heat dissipation capacity of the cable is good.

[0055] The outer side of the silicone rubber layer 217 is provided with a compression and bending resistance component 3, which includes a semicircular groove 301, a limit box 302, an M-shaped plate 303, a support spring 304, a support arc piece 305, an elastic piece 306, a docking port 307, a docking head 308, a clamping head 309, a clamping tooth 310, an elastic tube 311, a clamping port 312, a bending port 313, an outer rubber band 314, a filling sponge 315, a sleeve groove 316, a rubber band ring 317, an inner sheath 318, an armor belt 319 and an outer sheath 320;

[0056] A plurality of semicircular grooves 301 are sleeved at equal intervals on the outside of the silicone rubber layer 217. A docking port 307 is provided at both ends of the semicircular groove 301 at the top, and a docking joint 308 is welded at both ends of the semicircular groove 301 at the bottom. The docking joint 308 is embedded in the adjacent docking port 307, which facilitates the combined connection of the two semicircular grooves 301, making the installation of the semicircular groove 301 more convenient. Six limit boxes 302 are provided inside the semicircular groove 301, and an M-shaped plate 303 is connected between two adjacent limit boxes 302. The two ends of the M-shaped plate 303 are respectively embedded in the adjacent limit boxes 302. A plurality of support springs 304 are welded between the two ends of the M-shaped plate 303 and the adjacent limit boxes 302. A support arc piece 305 is welded on the top of the M-shaped plate 303, and elastic pieces 306 are welded at both ends of the support arc piece 305.

[0057] A plurality of clamping joints 309 are welded at equal intervals on both sides of the semicircular groove 301, and an elastic tube 311 is connected between the two opposite clamping joints 309. A plurality of bending openings 313 are opened at equal intervals on the outside of the elastic tube 311. The elastic tube 311 is made of iron. The bending openings 313 provide bending space for bending the cable, and the connection position of the bending openings 313 is an arc-shaped iron sheet with good elasticity. An outer rubber band 314 is embedded in the elastic tube 311. The outer rubber band 314 is made of elastic rubber. When the cable is bent by external force, the arc-shaped iron sheet at the connection position of the outer rubber band 314 and the bending opening 313 bends. When the external force is withdrawn, the arc-shaped iron sheet at the connection position of the outer rubber band 314 and the bending opening 313 rebounds, further improving the bending resistance of the cable.

[0058] A plurality of engaging teeth 310 are formed on the outside of the engaging connector 309, and a plurality of engaging interfaces 312 are formed at both ends of the elastic tube 311. The engaging teeth 310 are embedded in adjacent engaging interfaces 312. When the elastic tube 311 is installed, when the engaging interfaces 312 and the engaging teeth 310 are aligned, the engaging teeth 310 can be embedded in the engaging interfaces 312, thereby facilitating the connection and fixing of the elastic tube 311 and making installation quick and easy.

[0059] A filling sponge 315 is wrapped between the two semicircular grooves 301 on the outside of the elastic tube 311 and located in the same plane. When the cable is subjected to external force, the filling sponge 315 can absorb the external force and cooperate with the thermal conductive silicone pad 212 to absorb the external force. The filling sponge 315 and the thermal conductive silicone pad 212 cooperate inside and outside to further enhance the cable's compressive strength. A plurality of sleeve grooves 316 are opened on the outside of the filling sponge 315. A rubber band ring 317 is sleeved between two adjacent sleeve grooves 316. The elasticity of the rubber band ring 317 can tighten and fix the filling sponge 315.

[0060] The outer side of the filling sponge 315 is wrapped with an inner sheath 318, the outer side of the inner sheath 318 is wrapped with an armor tape 319, and the outer side of the armor tape 319 is wrapped with an outer sheath 320. The inner sheath 318 and the outer sheath 320 are made of halogen-free flame-retardant rubber. Halogen-free flame-retardant rubber has flame-retardant, low-smoke and non-toxic properties when burned, making the cable more environmentally friendly.

[0061] According to the above technical solution, a method for preparing a photovoltaic cable that is resistant to high temperatures and has a long service life is provided, and a method and device for preparing a photovoltaic cable that is resistant to high temperatures and has a long service life are provided.

[0062] The working principle and use process of the present invention are as follows: the rubber ring 209 is filled with an inner flame retardant 210, and the rubber tube 214 is filled with an outer flame retardant 215. The inner flame retardant 210 and the outer flame retardant 215 are both expanded graphite. When the rubber ring 209 and the rubber tube 214 burn, the flame contacts the expanded graphite, and the expanded graphite expands to form a worm-like porous structure. The carbon layer formed by the expansion covers the surface of the conductor 1, effectively isolating the external oxygen and reducing the heat transfer to the conductor 1. The expanded graphite diffuses into the inside of the diffusion port 216, while the outer side of the thermal conductive silicone pad 212 is wrapped. Wrapped with a silicone rubber layer 217, the silicone rubber layer 217 is made of ceramic silicone rubber. After burning, the ceramic silicone rubber will quickly harden into porcelain to form a hard ceramic shell. The ceramic shell can limit the expanded graphite, so that the expanded graphite is tightly accumulated between the ceramic shell and the outside of the conductor 1. The flame retardant plate 206 can block the flame and prevent the flame from spreading from the center of the support sleeve 201 to the inside of the unburned cable. The stacked layers of expanded graphite carbon layers cooperate with the flame retardant plate 206 to fully prevent the flame from spreading to the inside of the unburned cable, and the flame retardant effect of the cable is better.

[0063] The inner rubber rib 211 is made of elastic rubber. When the cable is bent by an external force, the inner rubber rib 211 also bends. When the external force is removed, the inner rubber rib 211 rebounds, thereby improving the bending resistance of the cable.

[0064] When the cable is subjected to external pressure, the external pressure will first act on the supporting arc piece 305, which is connected to the M-shaped plate 303, and the pressure is transmitted to the M-shaped plate 303. The M-shaped plate 303 is elastically deformed under the force. After the M-shaped plate 303 is deformed, the two ends of the M-shaped plate 303 squeeze the supporting spring 304, and the supporting spring 304 is compressed, directing the external pressure to the limit box 302. Elastic sheets 306 are provided at both ends of the supporting arc piece 305. The elastic sheet 306 is elastically deformed under the force and directs the external pressure to the semicircular groove 301. The M-shaped plate 303, the supporting spring 304 and the elastic sheet 306 cooperate to store part of the external force, and transfer part of the external force to the semicircular groove 301 and the limit box 302. When the external force is withdrawn, the supporting spring 304, the M-shaped plate 303 and the elastic sheet 306 rebound, releasing elastic potential energy, thereby enhancing the compressive strength of the cable. The cable has strong compressive strength.

[0065] The supporting sleeve 201, the curved plate 202, the Y-shaped plate 203, the limiting groove 204, the bending piece 205, the flame-retardant plate 206, the connecting spiral tube 207 and the fixing belt 208 are all made of iron alloy. The curved plate 202 supports each conductor 1 separately. When the cable is subjected to external pressure, it can prevent the conductors 1 from twisting. The cable has a strong anti-torsion ability. When the cable is subjected to external force, the curved plate 202 squeezes the Y-shaped plate 203. Under the limitation of the limiting groove 204, when the Y-shaped plate 203 is squeezed, the tip of the Y-shaped plate 203 squeezes the bending piece 205. The curved plate 202, the Y-shaped plate 203 and the bending piece 205 are all elastic and can store external force, so that most of the external force acts on the supporting sleeve 201, the curved plate 202, the Y-shaped plate 203 and the bending piece 205, which fully protects the conductor 1 and further enhances the pressure resistance of the cable. The pressure resistance of the cable is stronger.

[0066] A thermally conductive silicone pad 212 and a filling sponge 315 are provided inside the cable. The thermally conductive silicone pad 212 and the filling sponge 315 can absorb external forces. The filling sponge 315 cooperates with the thermally conductive silicone pad 212 inside and outside, further enhancing the cable's compressive resistance.

[0067] The thermally conductive silicone pad 212 has good thermal conductivity. When the cable is operating normally, the thermally conductive silicone pad 212 fits the conductor 1, and the heat generated by the conductor 1 can be quickly transferred to the thermally conductive silicone pad 212, so the cable has good heat dissipation capacity.

[0068] A plurality of bending openings 313 are formed at equal intervals on the outside of the elastic tube 311. The elastic tube 311 is made of iron. The bending openings 313 provide bending space for the cable. The connection position of the bending openings 313 is an arc-shaped iron sheet with good elasticity. An outer rubber band 314 is embedded in the elastic tube 311. The outer rubber band 314 is made of elastic rubber. When the cable is bent by an external force, the arc-shaped iron sheet at the connection position of the outer rubber band 314 and the bending opening 313 bends. When the external force is removed, the arc-shaped iron sheet at the connection position of the outer rubber band 314 and the bending opening 313 rebounds, further improving the bending resistance of the cable.

[0069] When the elastic tube 311 is installed, when the card interface 312 is aligned with the card tooth 310, the card tooth 310 can be embedded in the card interface 312, which facilitates the connection and fixation of the elastic tube 311. The two adjacent semicircular grooves 301 are connected to the docking interface 307 through the docking joint 308. The components inside the cable are all modularly designed, which is convenient and quick to install. After the flame on the cable is extinguished, the cable can be easily repaired.

[0070] The rubber ring 209, rubber tube 214, inner sheath 318 and outer sheath 320 of the cable are made of halogen-free flame-retardant rubber. The halogen-free flame-retardant rubber has the characteristics of flame retardancy, low smoke and non-toxicity when burned, making the cable more environmentally friendly.

[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A photovoltaic cable with high temperature resistance and long service life, comprising a conductor (1), characterized in that: Four conductors (1) are provided, and a flame retardant and pressure-resistant component (2) is provided on the outside of the conductor (1), and the flame retardant and pressure-resistant component (2) includes a supporting sleeve (201); The centers of the four conductors (1) are filled with support sleeves (201), a plurality of the support sleeves (201) are arranged at equal intervals, four arc-shaped plates (202) are welded at equal intervals on the outside of the support sleeves (201), and the arc-shaped plates (202) are in contact with the outsides of adjacent conductors (1); A Y-shaped plate (203) is connected in the middle of the top ends of two adjacent arc-shaped plates (202), and the Y-shaped plate (203) is located in the gap between two adjacent conductors (1). A limiting groove (204) is welded outside the support sleeve (201) and located in the middle of the two adjacent arc-shaped plates (202). A bending piece (205) is connected between the inner side of the limiting groove (204) and the tip of the adjacent Y-shaped plate (203), and the tip of the Y-shaped plate (203) is embedded in the adjacent limiting groove (204). A rubber ring (209) is embedded between two adjacent support sleeves (201) and located at the center of the four conductors (1), and the interior of the rubber ring (209) is filled with an internal flame retardant (210); A thermally conductive silicone pad (212) is filled in a gap between two adjacent support sleeves (201) and between two adjacent conductors (1); a fixing groove (213) is provided on the outside of the thermally conductive silicone pad (212); a rubber tube (214) is embedded in the fixing groove (213); an external flame retardant (215) is filled in the rubber tube (214); and a plurality of diffusion openings (216) are provided at equal intervals on the inside of the thermally conductive silicone pad (212); The heat-conducting silicone pad (212) is wrapped with a silicone rubber layer (217) on the outside, and a pressure-resistant and bending-resistant component (3) is provided on the outside of the silicone rubber layer (217), and the pressure-resistant and bending-resistant component (3) includes a semicircular groove (301); The outer side of the silicone rubber layer (217) is sleeved with a plurality of semicircular grooves (301) at equal intervals, six limit boxes (302) are arranged inside the semicircular grooves (301), an M-shaped plate (303) is connected between two adjacent limit boxes (302), both ends of the M-shaped plate (303) are respectively embedded in the adjacent limit boxes (302), a plurality of support springs (304) are welded between the two ends of the M-shaped plate (303) and the adjacent limit boxes (302), a support arc piece (305) is welded on the top of the M-shaped plate (303), and elastic pieces (306) are welded at both ends of the support arc piece (305); A plurality of clamping joints (309) are welded at equal intervals on both sides of the semicircular groove (301); an elastic tube (311) is connected between two opposing clamping joints (309); a plurality of bending openings (313) are opened at equal intervals on the outside of the elastic tube (311); and an outer rubber band (314) is embedded in the elastic tube (311); The outer side of the card joint (309) is provided with a plurality of card teeth (310), and the two ends of the elastic tube (311) are provided with a plurality of card interfaces (312), and the card teeth (310) are embedded in adjacent card interfaces (312); A filling sponge (315) is wrapped between two semicircular grooves (301) located on the outside of the elastic tube (311) and in the same plane. A plurality of sleeve grooves (316) are provided on the outside of the filling sponge (315), and a rubber band ring (317) is sleeved between two adjacent sleeve grooves (316).

2. A photovoltaic cable with high temperature resistance and long service life according to claim 1, characterized in that: A flame retardant plate (206) is welded in the middle of the support sleeve (201), and two adjacent rubber ring cylinders (209) are separated by the flame retardant plate (206).

3. The photovoltaic cable with high temperature resistance and long service life according to claim 2, characterized in that: A fixing belt (208) is wound around the outside of the rubber ring tube (209), and connecting screw tubes (207) are welded to both ends of the fixing belt (208). The connecting screw tubes (207) are connected to the adjacent supporting sleeves (201) via threaded holes, and an inner rubber rib (211) is embedded in the middle of the rubber ring tube (209).

4. The photovoltaic cable with high temperature resistance and long service life according to claim 3, characterized in that: The thermally conductive silica gel pad (212) is located outside the fixing belt (208).

5. The photovoltaic cable with high temperature resistance and long service life according to claim 1, characterized in that: The semicircular groove (301) at the top is provided with docking ports (307) at both ends, and the semicircular groove (301) at the bottom is welded with docking joints (308) at both ends, and the docking joints (308) are embedded in adjacent docking ports (307).

6. The photovoltaic cable with high temperature resistance and long service life according to claim 5, characterized in that: The outer side of the filling sponge (315) is wrapped with an inner sheath (318), the outer side of the inner sheath (318) is wrapped with an armor tape (319), and the outer side of the armor tape (319) is wrapped with an outer sheath (320).

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