Flame-retardant fireproof 35kV aluminum alloy power cable

Abstract

The invention discloses a flame-retardant fireproof 35kV aluminum alloy power cable, and relates to the technical field of cables, the outer side of an insulating layer is sleeved with a plurality of branching discs at equal intervals, the outer side of each branching disc is welded with a support ring, the outer side of each support ring is wrapped with an inner silica gel sleeve, the outer side of each inner silica gel sleeve is provided with a plurality of arc-shaped boxes, one side of each arc-shaped box is provided with an interlocking inner rail, and the other side of each arc-shaped box is provided with an interlocking outer rail. According to the invention, external force is absorbed through deformation of the outer silicon rubber case, the inner silicon rubber case, the arc-shaped boxes, the arc-shaped frames and the anti-bending springs, the influence of external acting force on a conductor is reduced, the elastic tube and the arc-shaped elastic sheet deform, and the deformation of the elastic tube and the arc-shaped elastic sheet is reduced. The interlocking inner rail and the interlocking outer rail are connected in a jigsaw type interlocking structure, interlocking performance and stability are achieved, the overall structure of the cable is firmer, and the cable is not prone to falling apart.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly to a flame-retardant and fire-proof 35kV aluminum alloy power cable. Background Art

[0002] A flame-retardant cable refers to a cable that, under specified test conditions, when the specimen is burned and the test fire source is removed, the spread of the flame is only within a limited range, and the residual flame or afterglow can self-extinguish within a limited time. Its fundamental characteristic is that it may be damaged and unable to operate in case of a fire, but it can prevent the spread of the fire. Generally speaking, in case of a wire fire, it can limit the combustion to a local area, without spreading, and avoid causing greater losses.

[0003] In the Chinese patent with the application number CN202120837455.4 and the name "A Flame-Retardant Cable", the patent adds support sheets between multiple cables, avoiding the stress relationship between multiple cables, avoiding mutual interference between cables while ensuring the integrity of the cables, and improving the reliability of the cables;

[0004] When the cable is laid, it is easily affected by external impacts. The cable of this patent is only supported by support sheets. When the conductor is under external pressure, it cannot provide good protection for the conductor. After the cable is bent, it is difficult to rebound, the toughness of the cable is poor, and the existing cable has poor heat dissipation conditions. If the cable is always at a high temperature, it will not only hinder the transmission efficiency of the cable, but also may cause self-ignition or other-ignition phenomena in severe cases. Summary of the Invention

[0005] The present invention provides a flame-retardant and fire-proof 35kV aluminum alloy power cable, which can effectively solve the problems in the above background art that the cable of this patent is only supported by support sheets. When the conductor is under external pressure, it cannot provide good protection for the conductor. After the cable is bent, it is difficult to rebound, the toughness of the cable is poor, and the existing cable has poor heat dissipation conditions. If the cable is always at a high temperature, it will not only hinder the transmission efficiency of the cable, but also may cause self-ignition or other-ignition phenomena in severe cases.

[0006] To achieve the above object, the present invention provides the following technical solution: A flame-retardant and fire-proof 35kV aluminum alloy power cable includes a conductor. There are three conductors. An insulating layer is wrapped outside the conductor. A protection and compression resistance component is arranged outside the insulating layer. The protection and compression resistance component includes a wire dividing disc;

[0007] A plurality of wire dividing discs are sleeved outside the insulating layer at equal intervals. A support ring is welded outside the wire dividing disc. An inner silica gel sleeve is wrapped outside the support ring. A plurality of arc-shaped boxes are arranged outside the inner silica gel sleeve;

[0008] One side of the arc box is provided with an interlocking inner rail, and the other side of the arc box is provided with an interlocking outer rail. The three adjacent arc boxes are connected by the interlocking inner rail and the interlocking outer rail, and the interlocking inner rail is embedded in the adjacent interlocking outer rail.

[0009] A plurality of assembly openings are provided at equal intervals in the middle of the arc box, an arc frame is clamped inside the assembly opening, three elastic tubes are connected to the middle of the arc frame through a connecting plate, and a threaded tube is connected to the middle of the elastic tube through two arc-shaped spring pieces.

[0010] According to the above technical solution, three docking outer tubes are provided at one end of the arc box, and three docking inner tubes are provided at the other end of the arc box, and the docking inner tubes are embedded in adjacent docking outer tubes.

[0011] According to the above technical solution, a bending opening is provided in the middle of the arc box and located between two adjacent assembly openings. The bending opening is composed of two arc-shaped notches alternatingly. The bending openings are evenly spaced on the outside of the arc box, and three disassembly and assembly openings are provided on both sides of the assembly opening.

[0012] According to the above technical solution, the arc frame is composed of two arc plates connected together, and both ends of the arc frame are provided with card interfaces, and both ends of the assembly opening are embedded in adjacent card interfaces.

[0013] According to the above technical solution, an anti-bending spring is connected between the threaded tubes inside two adjacent arc-shaped frames, threaded rods are welded at both ends of the anti-bending spring, and the threaded rods are connected to the adjacent threaded tubes through threaded holes.

[0014] According to the above technical solution, the outer side of the arc box is wrapped with an outer silicone sleeve, the outer side of the outer silicone sleeve is wrapped with a fire-resistant mica tape, and the outer side of the fire-resistant mica tape is wrapped with a rubber sleeve.

[0015] According to the above technical solution, a bend-resistant and flame-retardant component is provided at the center of the rubber sleeve, and the bend-resistant and flame-retardant component includes a heat pipe;

[0016] The center of the rubber sleeve is located in the gap between the three conductors, and a heat pipe is embedded in it. The heat pipe runs through the center of the distribution plate. Bend holes are evenly opened on the outside of the heat pipe, and an elastic strip is embedded in the middle of the heat pipe.

[0017] Fixed tubes are provided at the outside of the heat conducting tubes at both ends of the distribution tray. Several heat conducting sleeves and silicone sleeves are sleeved at equal intervals between two adjacent distribution trays on the outside of the heat conducting tubes. Support tubes are welded to the outside of the heat conducting sleeves. The support tubes have the same longitudinal cross-sectional shape as the fixed tubes.

[0018] Three rubber bags are arranged between two adjacent distribution plates. The rubber bags are located in the gaps between the three conductors and the inner silicone sleeves. The rubber bags are filled with aluminum hydroxide powder.

[0019] According to the above technical solution, three connecting ears are welded on both sides of the support ring at equal intervals, and an elastic frame is connected between adjacent support rings through the connecting ears, and the elastic frame is attached to the adjacent rubber bladder.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. A protection and compression resistance component is provided. When the cable is subjected to external pressure, the outer silicone sleeve, inner silicone sleeve, arc-shaped box, arc-shaped frame and bending-resistant spring deform to absorb the external force, reducing the influence of the external force on the conductor, enabling the cable to operate stably. And when subjected to external force, the elastic tube and arc-shaped elastic piece deform to further absorb the external force, further increasing the compression resistance of the cable. The connection mode of the interlocking inner rail and interlocking outer rail is a jigsaw interlocking structure, which has interlocking property and stability, making the overall structure of the cable more firm and not easily falling apart;

[0022] When the cable is bent, when the external force is removed, the arc-shaped elastic piece rebounds, the bending-resistant spring rebounds, and the arc-shaped box returns to its original state. When the same part is subjected to external force oppression next time, the cable can still effectively absorb the external force. The cable has strong compression resistance and better toughness;

[0023] The distribution panel and support ring can enhance the overall strength of the cable. When the cable is subjected to external force, the distribution panel and support ring can provide strong support, further increasing the compression resistance of the cable. And the distribution panel can limit the conductor. The cable has good anti-torsion ability. Moreover, the distribution panel, support ring, arc-shaped box and arc-shaped frame are all made of aluminum alloy, and the outer silicone sleeve and inner silicone sleeve are made of heat-conducting silicone pads, which have good heat-conducting performance, enabling the heat on the cable to be evenly distributed and the cable to have strong heat dissipation ability.

[0024] 2. A bending-resistant and flame-retardant component is provided. The heat-conducting tube, heat-conducting sleeve, support tube and silicone sleeve are located in the center of the cable. The support tube and silicone sleeve are in contact with the insulating layer, and the heat dissipation area of the conductor is larger, further improving the heat dissipation ability of the cable and enhancing the operating stability of the cable;

[0025] The support tube, silicone sleeve and rubber bladder separate the conductors. When the cable is subjected to external extrusion, it can prevent friction between the insulating layers, protecting the insulating layer outside the conductor, and the cable has stronger compression resistance. When the cable is subjected to external bending, the elastic frame and elastic strip are made of elastic rubber, which has good elasticity. Combined with the elasticity of the bending-resistant spring, the elasticity of the three is superimposed, making the cable have excellent anti-bending ability;

[0026] When the cable comes into contact with flames, the fire-resistant mica tape will initially isolate the flames, providing reaction time for the cable to be powered off. When the flame enters the cable and comes into contact with the aluminum hydroxide powder inside the rubber bag, the aluminum hydroxide absorbs a large amount of heat at high temperature, delaying the combustion process. During the combustion process, aluminum hydroxide will release water vapor and carbon dioxide to dilute the oxygen concentration in the air, preventing the spread of flames. In addition, the aluminum hydroxide produced by the decomposition of aluminum hydroxide at high temperatures will form a dense protective layer on the surface of the material, isolating the contact between oxygen and combustibles, and the cable has better flame retardant ability.

[0027] To sum up, the disassembly and assembly port in the protective pressure-resistant component can increase the operating space for the staff and facilitate the installation and disassembly of the arc frame and the anti-bending spring. The heat pipe, elastic strip, support tube, silicone sleeve, rubber bag and elastic frame in the bend-resistant and flame-retardant component are all movable assemblies. The overall cable is composed of a modular combination. The cable has good pressure resistance, heat dissipation and flame retardancy, and is also more convenient to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] In the attached figure:

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

[0031] Figure 2 It is a schematic structural diagram of the protective pressure-resistant assembly of the present invention;

[0032] Figure 3 is a cross-sectional view of a conductor of the present invention;

[0033] Figure 4 This is a schematic diagram of the installation structure of the arc frame of the present invention;

[0034] Figure 5 This is a schematic diagram of the installation structure of the anti-bending spring of the present invention;

[0035] Figure 6 Schematic diagram of the installation structure of the elastic tube of the present invention;

[0036] Figure 7 Schematic diagram of the structure of the bending-resistant flame-retardant assembly of the present invention;

[0037] Figure 8 This is a schematic diagram of the installation structure of the rubber bag of the present invention;

[0038] Figure 9 It is a schematic diagram of the installation structure of the fixed pipe of the present invention;

[0039] Figure 10 It is a schematic diagram of the installation structure of the silica gel sleeve of the present invention;

[0040] Figure 11 It is a schematic diagram of the installation structure of the support pipe of the present invention;

[0041] Reference numerals in the figure: 1, conductor; 2, insulating layer;

[0042] 3, protection and compression resistance component; 301, wire distributing disc; 302, support ring; 303, inner silica gel sleeve; 304, arc-shaped box; 305, docking outer pipe; 306, docking inner pipe; 307, bending port; 308, assembly port; 309, disassembly and assembly port; 310, arc-shaped frame; 311, clamping interface; 312, connecting plate; 313, elastic tube; 314, arc-shaped elastic piece; 315, threaded tube; 316, threaded rod; 317, bending resistance spring; 318, interlocking inner rail; 319, interlocking outer rail; 320, outer silica gel sleeve; 321, fire-resistant mica tape; 322, rubber sleeve;

[0043] 4, bending resistance and flame retardant component; 401, heat conducting tube; 402, bending hole; 403, elastic strip; 404, fixed tube; 405, heat conducting sleeve; 406, support tube; 407, silica gel sleeve; 408, rubber bladder; 409, aluminum hydroxide powder; 410, connecting ear; 411, elastic frame. Specific embodiments

[0044] The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.

[0045] Embodiment: As Figures 1-11 shown, the present invention provides a technical solution for a flame-retardant and fire-proof 35 kV aluminum alloy power cable, including a conductor 1. There are three conductors 1. An insulating layer 2 is wrapped outside the conductor 1. A protection and compression resistance component 3 is arranged outside the insulating layer 2. The protection and compression resistance component 3 includes a wire distributing disc 301, a support ring 302, an inner silica gel sleeve 303, an arc-shaped box 304, a docking outer pipe 305, a docking inner pipe 306, a bending port 307, an assembly port 308, a disassembly and assembly port 309, an arc-shaped frame 310, a clamping interface 311, a connecting plate 312, an elastic tube 313, an arc-shaped elastic piece 314, a threaded tube 315, a threaded rod 316, a bending resistance spring 317, an interlocking inner rail 318, an interlocking outer rail 319, an outer silica gel sleeve 320, a fire-resistant mica tape 321 and a rubber sleeve 322;

[0046] A plurality of distribution plates 301 are sleeved at equal intervals on the outside of the insulating layer 2, a support ring 302 is welded to the outside of the distribution plate 301, an inner silicone sleeve 303 is wrapped around the outside of the support ring 302, and a plurality of arc boxes 304 are arranged on the outside of the inner silicone sleeve 303. Three docking outer tubes 305 are provided at one end of the arc box 304, and three docking inner tubes 306 are provided at the other end of the arc box 304. The docking inner tubes 306 are embedded in the adjacent docking outer tubes 305. The docking inner tubes 306 and the docking outer tubes 305 are connected to each other through the mutual cooperation of the docking inner tubes 306 and the docking outer tubes 305, which facilitates the disassembly and assembly of the two arc boxes 304.

[0047] An interlocking inner rail 318 is provided on one side of the arc box 304, and an interlocking outer rail 319 is provided on the other side of the arc box 304. Three adjacent arc boxes 304 are connected by the interlocking inner rail 318 and the interlocking outer rail 319, and the interlocking inner rail 318 is embedded in the adjacent interlocking outer rail 319;

[0048] A plurality of assembly openings 308 are provided at equal intervals in the middle of the arc-shaped box 304. An arc-shaped frame 310 is clamped inside the assembly openings 308. The arc-shaped frame 310 is composed of two arc-shaped plates connected together. A clamping interface 311 is provided at each end of the arc-shaped frame 310. The two ends of the assembly openings 308 are embedded in the adjacent clamping interfaces 311. When installing the arc-shaped frame 310, the clamping interface 311 at one end of the arc-shaped frame 310 is docked with one end of the assembly opening 308. The arc-shaped frame 310 is then bent and the clamping interface 311 at the other end of the arc-shaped frame 310 is docked with the other end of the assembly opening 308 to achieve quick installation of the arc-shaped frame 310. Three elastic tubes 313 are connected to the middle of the arc-shaped frame 310 via a connecting plate 312. A threaded tube 315 is connected to the middle of the elastic tube 313 via two arc-shaped spring clips 314.

[0049] An anti-bending spring 317 is connected between the threaded tubes 315 inside two adjacent arc-shaped frames 310. Threaded rods 316 are welded to both ends of the anti-bending spring 317. The threaded rods 316 are connected to the adjacent threaded tubes 315 through threaded holes. The threaded rods 316 cooperate with the threaded tubes 315 to facilitate installation and removal of the anti-bending spring 317. When the cable is bent by external force, the anti-bending spring 317 deforms. When the external force is removed, the anti-bending spring 317 rebounds and the cable returns to a straight position.

[0050] A bending opening 307 is provided in the middle of the arc box 304 and between two adjacent assembly openings 308. The bending opening 307 is composed of two alternating arc-shaped notches. The bending openings 307 are evenly spaced on the outside of the arc box 304. The bending opening 307 can provide bending space for the cable, allowing the cable to bend. Three disassembly openings 309 are provided on both sides of the assembly opening 308. The disassembly openings 309 can increase the operating space for the staff and facilitate the installation and disassembly of the arc frame 310 and the anti-bending spring 317.

[0051] The outer side of the arc-shaped box 304 is wrapped with an outer silicone sleeve 320. The outer side of the outer silicone sleeve 320 is wound with a refractory mica tape 321. The outer side of the refractory mica tape 321 is wrapped with a rubber sleeve 322. Both the outer silicone sleeve 320 and the inner silicone sleeve 303 are made of heat-conducting silicone pads and have good heat-conducting performance. When the refractory mica tape 321 encounters external high temperature, the refractory mica tape 321 can protect the inside of the wire and cable from being affected within a certain period of time;

[0052] A bending-resistant and flame-retardant component 4 is arranged at the center of the rubber sleeve 322. The bending-resistant and flame-retardant component 4 includes a heat-conducting tube 401, a bending hole 402, an elastic strip 403, a fixing tube 404, a heat-conducting sleeve 405, a support tube 406, a silicone sleeve 407, a rubber bladder 408, aluminum hydroxide powder 409, a connecting ear 410, and an elastic frame 411;

[0053] A heat-conducting tube 401 is embedded in the gap in the middle of the three conductors 1 at the center of the rubber sleeve 322. The heat-conducting tube 401 penetrates through the center of the wire distributing plate 301. Bending holes 402 are evenly arranged on the outer side of the heat-conducting tube 401. The bending holes 402 provide a bending space for the bending of the heat-conducting tube 401. An elastic strip 403 is embedded in the middle of the heat-conducting tube 401;

[0054] Fixing tubes 404 are arranged on both ends of the wire distributing plate 301 on the outer side of the heat-conducting tube 401. A plurality of heat-conducting sleeves 405 and silicone sleeves 407 are sleeved on the outer side of the heat-conducting tube 401 at equal intervals in the middle of two adjacent wire distributing plates 301. A support tube 406 is welded on the outer side of the heat-conducting sleeve 405. The support tube 406 has the same longitudinal section shape as the fixing tube 404. The silicone sleeve 407 is also made of a heat-conducting silicone pad;

[0055] Three rubber bladders 408 are arranged in the middle of two adjacent wire distributing plates 301. The rubber bladders 408 are located in the gap between the three conductors 1 and the inner silicone sleeve 303. Aluminum hydroxide powder 409 is filled in the rubber bladders 408. Aluminum hydroxide has a high specific heat capacity and can absorb a large amount of heat at high temperature, reduce the surface temperature of the material, and delay the combustion process. During the combustion process, aluminum hydroxide will release water vapor and carbon dioxide. These gases can dilute the oxygen concentration in the air, prevent the spread of the flame, and the aluminum hydroxide produced by the decomposition of aluminum hydroxide at high temperature will form a dense protective layer on the surface of the material, isolating the contact between oxygen and combustibles, playing a barrier role, and further enhancing the flame-retardant ability of the cable. Three connecting ears 410 are welded at equal intervals on both sides of the support ring 302. An elastic frame 411 is connected between two adjacent support rings 302 through the connecting ears 410. The elastic frame 411 is in contact with the adjacent rubber bladder 408. The elastic frame 411 and the elastic strip 403 are made of elastic rubber, so that the cable has sufficient toughness. When installing the rubber bladder 408, the elastic frame 411 can fix the rubber bladder 408;

[0056] The wire distributing plate 301, the support ring 302, the arc-shaped box 304, the butt joint outer pipe 305, the butt joint inner pipe 306, the arc-shaped frame 310, the connecting plate 312, the elastic pipe 313, the arc-shaped elastic piece 314, the threaded pipe 315, the threaded rod 316, the bending-resistant spring 317, the interlocking inner rail 318, the interlocking outer rail 319, the heat-conducting pipe 401, the fixed pipe 404, the heat-conducting sleeve 405 and the support pipe 406 can be selected to be made of aluminum alloy. By adding alloying elements such as copper, magnesium, and silicon to the aluminum alloy, its strength is greatly improved, and it can withstand greater external forces and loads. In addition, the toughness of the aluminum alloy is also better than that of pure aluminum, and it is not easy to appear cracks or fractures after being bent, improving the reliability and safety of use, and at the same time having good heat-conducting performance.

[0057] The working principle and usage process of the present invention: When the cable is subjected to external pressure, the external pressure acts on the outer silicone sleeve 320, the arc-shaped box 304, the arc-shaped frame 310 and the inner silicone sleeve 303. The outer silicone sleeve 320, the inner silicone sleeve 303, the arc-shaped box 304, the arc-shaped frame 310 and the bending-resistant spring 317 deform to absorb the external force, reducing the influence of the external acting force on the conductor 1, enabling the cable to operate stably. And under the action of the external force, the elastic pipe 313 and the arc-shaped elastic piece 314 deform, and can further absorb the external force, further increasing the compressive capacity of the cable. Three adjacent arc-shaped boxes 304 are connected through the interlocking inner rail 318 and the interlocking outer rail 319. The connection mode of the interlocking inner rail 318 and the interlocking outer rail 319 is a jigsaw interlocking structure, which has interlocking property and stability. The interlocking inner rail 318 and the interlocking outer rail 319 lock each other, making the overall structure of the cable more firm and not easy to fall apart;

[0058] When the cable is bent, when the external force is removed, the arc-shaped elastic piece 314 rebounds, the bending-resistant spring 317 rebounds, and the arc-shaped box 304 returns to its original state. When the same part is subjected to external pressure next time, the cable can still effectively absorb the external force, and the cable has strong compressive capacity and better toughness at the same time;

[0059] The wire distributing plate 301 and the support ring 302 can enhance the overall strength of the cable. When the cable is subjected to external force, the wire distributing plate 301 and the support ring 302 can provide strong support, further increasing the compressive capacity of the cable. And the wire distributing plate 301 can limit the conductor 1, avoiding the conductor 1 from twisting, and the cable has better anti-torsion ability;

[0060] When the cable is bent by external force, the elastic frame 411 and the elastic strip 403 are made of elastic rubber and have good elasticity. Combined with the elasticity of the bending-resistant spring 317, the elasticity of the three is superimposed, making the cable have excellent anti-bending ability;

[0061] The wire distributing plate 301, the support ring 302, the arc-shaped box 304, the butt joint outer tube 305, the butt joint inner tube 306, and the arc-shaped frame 310 are all made of aluminum alloy. The outer silicone sleeve 320 and the inner silicone sleeve 303 are made of heat-conducting silicone pads and have good heat-conducting performance. When the local working environment temperature of the cable is relatively high, under the action of heat conduction, the heat can be evenly distributed, and the cable has strong heat dissipation ability. The heat-conducting tube 401, the heat-conducting sleeve 405, the support tube 406, and the silicone sleeve 407 are located in the center of the cable. The support tube 406 and the silicone sleeve 407 are in contact with the insulating layer 2. Under the action of heat conduction, the heat dissipation area of the conductor 1 is larger, further improving the heat dissipation ability of the cable and enhancing the operation stability of the cable;

[0062] When the cable comes into contact with a flame, the fire-resistant mica tape 321 initially isolates the flame, providing a reaction time for the cable to cut off the power. When the flame enters the cable and contacts the aluminum hydroxide powder 409 inside the rubber bladder 408, the aluminum hydroxide absorbs a large amount of heat at high temperature, reducing the surface temperature of the material and delaying the combustion process. During the combustion process, the aluminum hydroxide will release water vapor and carbon dioxide. These gases can dilute the oxygen concentration in the air, prevent the flame from spreading, and the aluminum hydroxide decomposed at high temperature will form a dense protective layer on the material surface, isolating the contact between oxygen and combustibles and playing a barrier role, further enhancing the flame retardancy of the cable;

[0063] The support tube 406, the silicone sleeve 407, and the rubber bladder 408 separate the conductor 1. When the cable is subjected to external extrusion, it can prevent friction between the insulating layers 2, protecting the insulating layer 2 outside the conductor 1, and the cable has stronger compressive ability;

[0064] The arc-shaped box 304 is connected through the mutual cooperation of the butt joint inner tube 306 and the butt joint outer tube 305. After the fire is extinguished, the worker removes the arc-shaped box 304 at the fire location. Due to the mutual cooperation of the butt joint inner tube 306 and the butt joint outer tube 305, and the mutual cooperation of the interlocking inner rail 318 and the interlocking outer rail 319, the arc-shaped box 304 can be quickly replaced. Moreover, the bending-resistant spring 317 is connected through the cooperation of the threaded rod 316 and the threaded tube 315, which is convenient for disassembly and assembly. When installing the rubber bladder 408, the elastic frame 411 fixes the rubber bladder 408. The overall cable is composed of modular combinations. While the cable has good compressive ability, heat dissipation ability, and flame retardancy, it is also more convenient to repair.

[0065] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flame-retardant and fire-proof 35kV aluminum alloy power cable, comprising a conductor (1), characterized in that, Three conductors (1) are provided, the outer side of the conductor (1) is wrapped with an insulating layer (2), a protective pressure-resistant component (3) is provided on the outer side of the insulating layer (2), and the protective pressure-resistant component (3) includes a distribution plate (301); A plurality of distribution plates (301) are sleeved at equal intervals on the outside of the insulation layer (2); a support ring (302) is welded on the outside of the distribution plate (301); an inner silicone sleeve (303) is wrapped around the outside of the support ring (302); and a plurality of arc-shaped boxes (304) are arranged on the outside of the inner silicone sleeve (303); One side of the arc box (304) is provided with an interlocking inner rail (318), and the other side of the arc box (304) is provided with an interlocking outer rail (319). Three adjacent arc boxes (304) are connected through the interlocking inner rail (318) and the interlocking outer rail (319), and the interlocking inner rail (318) is embedded in the adjacent interlocking outer rail (319); A plurality of assembly openings (308) are provided at equal intervals in the middle of the arc-shaped box (304), an arc-shaped frame (310) is clamped inside the assembly opening (308), three elastic tubes (313) are connected in the middle of the arc-shaped frame (310) via a connecting plate (312), and a threaded tube (315) is connected in the middle of the elastic tube (313) via two arc-shaped spring pieces (314).

2. A flame-retardant and fire-proof 35 kV aluminum alloy power cable according to claim 1, characterized in that, One end of the arc box (304) is provided with three butt-jointed outer tubes (305), and the other end of the arc box (304) is provided with three butt-jointed inner tubes (306), and the butt-jointed inner tubes (306) are embedded in adjacent butt-jointed outer tubes (305).

3. A 35kV aluminum alloy power cable with flame retardant and fire prevention properties according to claim 2, characterized in that, A bending opening (307) is provided in the middle of the arc-shaped box (304) and between two adjacent assembly openings (308). The bending opening (307) is composed of two arc-shaped notches alternately arranged. The bending openings (307) are evenly spaced outside the arc-shaped box (304). Three disassembly openings (309) are provided on both sides of the assembly opening (308).

4. A 35kV aluminum alloy power cable with flame retardancy and fire prevention according to claim 1, characterized in that, The arc frame (310) is composed of two arc plates connected together. Both ends of the arc frame (310) are provided with card interfaces (311), and both ends of the assembly opening (308) are embedded in adjacent card interfaces (311).

5. A flame-retardant and fire-proof 35 kV aluminum alloy power cable according to claim 1, characterized in that, An anti-bending spring (317) is connected between the threaded tubes (315) inside two adjacent arc-shaped frames (310), and threaded rods (316) are welded at both ends of the anti-bending spring (317). The threaded rods (316) are connected to the adjacent threaded tubes (315) through threaded holes.

6. A 35kV aluminum alloy power cable with flame retardancy and fire prevention according to claim 1, characterized in that, The outer side of the arc box (304) is wrapped with an outer silicone sleeve (320), the outer side of the outer silicone sleeve (320) is wrapped with a fire-resistant mica tape (321), and the outer side of the fire-resistant mica tape (321) is wrapped with a rubber sleeve (322).

7. A flame-retardant and fire-proof 35 kV aluminum alloy power cable according to claim 6, characterized in that, A bend-resistant and flame-retardant component (4) is provided at the center of the rubber sleeve (322), and the bend-resistant and flame-retardant component (4) includes a heat-conducting pipe (401); A heat conduction tube (401) is embedded in the center of the rubber sleeve (322) in the gap among the three conductors (1). The heat conduction tube (401) penetrates through the center of the wire distributing disc (301). Bent holes (402) are evenly formed in the outer side of the heat conduction tube (401), and an elastic strip (403) is embedded in the middle of the heat conduction tube (401). Fixing tubes (404) are arranged on the two ends of the wire distributing disc (301) on the outer side of the heat conduction tube (401). A plurality of heat conduction sleeves (405) and silica gel sleeves (407) are sleeved on the outer side of the heat conduction tube (401) at equal intervals among adjacent wire distributing discs (301). A support tube (406) is welded on the outer side of the heat conduction sleeve (405), and the support tube (406) has the same longitudinal section shape as the fixing tube (404). Three rubber bags (408) are arranged among adjacent wire distributing discs (301). The rubber bags (408) are in the gaps among the three conductors (1) and the inner silica gel sleeve (303), and aluminum hydroxide powder (409) is filled in the rubber bags (408).

8. A flame-retardant and fire-proof 35 kV aluminum alloy power cable according to claim 7, characterized in that, Three connecting ears (410) are welded on both sides of the support ring (302) at equal intervals. An elastic frame (411) is connected among adjacent support rings (302) through the connecting ears (410), and the elastic frame (411) is attached to the adjacent rubber bag (408).

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