A fire-retardant fireproof 35kV aluminum alloy power cable

Abstract

The application discloses a kind of fire-retardant 35kV aluminum alloy power cable, it is related to cable technical field, multiple branch boxes are sleeved with equal interval on the outside of insulating layer, support ring is welded on the outside of branch box, inner silica gel sleeve is wrapped on the outside of support ring, multiple arc boxes are arranged on the outside of inner silica gel sleeve, interlocking inner rail is arranged on one side of arc box, interlocking outer rail is arranged on the other side of arc box, adjacent three arc boxes are connected by interlocking inner rail and interlocking outer rail, the application is deformed by outer silica gel sleeve, inner silica gel sleeve, arc box, arc frame and bending spring, and external force is absorbed, the influence of external force on conductor is reduced, elastic tube and arc spring are deformed, can further absorb external force, further increase the compression resistance of cable, interlocking inner rail and interlocking outer rail connection mode is puzzle interlocking structure, with interlocking and stability, make cable overall structure more firm, not easy to scatter frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a 35kV aluminum alloy power cable with flame retardation and fire prevention. BACKGROUND

[0002] Flame-retardant cable refers to a cable that, under specified test conditions, the sample is burned, and after the test fire source is removed, the flame spread is only within the limited range, and the residual flame or residual burning can self-extinguish within the limited time. The fundamental characteristic is that it can be burned under fire conditions and cannot operate, but it can prevent the spread of fire. In simple terms, if the wire catches fire, it can limit the burning to a local area and prevent further damage.

[0003] In the Chinese patent with application number CN202120837455.4 and the name "flame-retardant cable", the patent increases support sheets between multiple cables to avoid the stress relationship between multiple cables, ensures the integrity of the cable, and avoids mutual interference between the cables to improve the reliability of the cable.

[0004] Cables are prone to external impact during installation. The cable in this patent is only supported by the support sheet, and the conductor cannot be well protected when subjected to external pressure. The cable is difficult to rebound after bending, and the cable has poor toughness. Moreover, 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 cause self-ignition or combustion phenomenon in severe cases. SUMMARY

[0005] The present application provides a 35kV aluminum alloy power cable with flame retardation and fire prevention, which can effectively solve the problem that the cable in the above-mentioned patent is only supported by the support sheet, the conductor cannot be well protected when subjected to external pressure, the cable is difficult to rebound after bending, the cable has poor toughness, 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 cause self-ignition or combustion phenomenon in severe cases.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a 35kV aluminum alloy power cable with flame retardation and fire prevention, comprising a conductor, the conductor is provided with three, the conductor is wrapped with an insulation layer outside, a protective pressure-resistant assembly is arranged outside the insulation layer, the protective pressure-resistant assembly comprises a distribution box;

[0007] A plurality of distribution boxes are sleeved outside the insulation layer at equal intervals, a support ring is welded outside the distribution box, an inner silica gel sleeve is wrapped outside the support ring, and a plurality of arc-shaped boxes are arranged outside the inner silica gel sleeve.

[0008] One side of the arc-shaped box is provided with an interlocking inner rail, and the other side of the arc-shaped box is provided with an interlocking outer rail, and three adjacent arc-shaped boxes are connected through 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 arranged at equal intervals in the middle of the arc-shaped box, and an arc-shaped frame is clamped in the assembly opening.

[0010] According to the above technical scheme, one end of the arc-shaped box is provided with three butt-jointed outer pipes, and the other end of the arc-shaped box is provided with three butt-jointed inner pipes, and the butt-jointed inner pipes are embedded in the adjacent butt-jointed outer pipes.

[0011] According to the above technical scheme, a bending opening is arranged in the middle of the arc-shaped box and between two adjacent assembly openings, the bending opening is alternately composed of two arc-shaped notches, the bending openings are distributed at equal intervals on the outside of the arc-shaped box, and three disassembly openings are arranged on both sides of the assembly opening.

[0012] According to the above technical scheme, the arc-shaped frame is composed of two arc-shaped plates connected, and a clamping opening is arranged at both ends of the arc-shaped frame, and the assembly opening is embedded in the adjacent clamping opening.

[0013] According to the above technical scheme, a bending-resistant spring is connected between the threaded pipes in the adjacent two arc-shaped frames, threaded rods are welded at both ends of the bending-resistant spring, and the threaded rods are connected through threaded holes between adjacent threaded pipes.

[0014] According to the above technical scheme, the outside of the arc-shaped box is wrapped with an outer silica gel sleeve, the outside of the outer silica gel sleeve is wrapped with a fire-resistant mica tape, and the outside of the fire-resistant mica tape is wrapped with a rubber sleeve.

[0015] According to the above technical scheme, the rubber sleeve is provided with a bending-resistant and flame-retardant component in the center, and the bending-resistant and flame-retardant component comprises a heat-conducting pipe.

[0016] The heat-conducting pipe is embedded in the gap between the three conductors in the center of the rubber sleeve, the heat-conducting pipe penetrates the center of the distribution block, the heat-conducting pipe is uniformly provided with a bending hole on the outside, and an elastic strip is embedded in the heat-conducting pipe.

[0017] The fixed pipe is arranged on the outside of the heat-conducting pipe at both ends of the distribution block, a plurality of heat-conducting sleeve pipes and silica gel sleeve pipes are arranged at equal intervals in the middle of the adjacent two distribution blocks on the outside of the heat-conducting pipe, a support pipe is welded on the outside of the heat-conducting sleeve pipe, and the support pipe has the same longitudinal cross-sectional shape as the fixed pipe.

[0018] Three rubber capsules are arranged in the middle of the adjacent two distribution blocks, the rubber capsules are arranged in the gap between the three conductors and the inner silica gel sleeve, and the rubber capsules are filled with aluminum hydroxide powder.

[0019] According to the above technical scheme, three connecting ears are welded at equal intervals on both sides of the support ring, and a elastic frame is connected between the middle of the adjacent two support rings through the connecting ears.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1. The protective and pressure-resistant assembly is provided, when the cable is subjected to external pressure, the outer silica gel sleeve, the inner silica gel sleeve, the arc-shaped box, the arc-shaped frame and the bending-resistant spring are deformed to absorb the external force, reducing the influence of external force on the conductor, enabling the cable to operate stably, and when subjected to external force, the elastic tube and the arc-shaped spring are deformed to further absorb the external force, further increasing the pressure resistance of the cable, the interlocking inner rail and the interlocking outer rail are connected in a puzzle interlocking structure, having interlocking and stability, making the overall structure of the cable more firm and less likely to collapse.

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

[0023] The distribution block and the support ring can enhance the overall strength of the cable, and when the cable is subjected to external force, the distribution block and the support ring can provide strong support, further increasing the pressure resistance of the cable, and the distribution block can limit the conductor, the cable has good torsional resistance, and the distribution block, the support ring, the arc-shaped box and the arc-shaped frame are all made of aluminum alloy, the outer silica gel sleeve and the inner silica gel sleeve are made of heat-conducting silica gel pads, having good heat-conducting performance, the heat on the cable can be evenly distributed, and the cable has strong heat dissipation capacity.

[0024] 2. The bend-resistant and flame-resistant assembly is provided, the heat-conducting pipe, the heat-conducting sleeve pipe, the support pipe and the silica gel sleeve pipe are located at the center of the cable, the support pipe and the silica gel sleeve pipe are in contact with the insulation layer, the conductor has a larger heat dissipation area, further improving the heat dissipation capacity of the cable and the operating stability of the cable.

[0025] The support pipe, the silica gel sleeve pipe and the rubber capsule separate the conductor, when the cable is subjected to external pressure, friction between the insulation layers can be prevented, the insulation layer on the outer side of the conductor is protected, and the cable has stronger pressure resistance, when the cable is subjected to external bending, the elastic frame and the elastic strip are made of elastic rubber, having good elasticity, cooperating with the elasticity of the bending-resistant spring, the elasticity of the three is superimposed, and the cable has excellent bending resistance.

[0026] When the cable is in contact with the flame, the fire-resistant mica tape preliminarily insulates the flame, providing a reaction time for the power-off of the cable, when the flame enters the cable and contacts the aluminum hydroxide powder in the rubber capsule, the aluminum hydroxide absorbs a large amount of heat at high temperature, delays the combustion process, and in the combustion process, the aluminum hydroxide releases water vapor and carbon dioxide to dilute the oxygen concentration in the air, preventing the spread of the flame, and the aluminum hydroxide produced by the decomposition of aluminum hydroxide at high temperature forms a dense protective layer on the surface of the material, isolating the contact of oxygen and combustible materials, and the cable has better flame-retardant ability.

[0027] In summary, the dismounting opening in the protection and compression resistance assembly can provide operating space for the staff, facilitate the installation and dismounting of the arc-shaped frame and the bending resistance spring, the heat-conducting pipe, the elastic strip, the support pipe, the silica gel sleeve, the rubber capsule and the elastic frame in the bending resistance and flame resistance assembly are all assembled movably, and the overall cable is combined by modules, so that the cable has good compression resistance, heat dissipation and flame resistance, and the maintenance is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, together with the embodiments of the application, to explain the application, and do not constitute a limitation on the application.

[0029] In the drawings:

[0030] Figure 1 is a perspective structural schematic diagram of the application;

[0031] Figure 2 is a structural schematic diagram of the protection and compression resistance assembly of the application;

[0032] Figure 3 is a sectional view of the conductor of the application;

[0033] Figure 4 is a mounting structural schematic diagram of the arc-shaped frame of the application;

[0034] Figure 5 is a mounting structural schematic diagram of the bending resistance spring of the application;

[0035] Figure 6 is a mounting structural schematic diagram of the elastic pipe of the application;

[0036] Figure 7 is a structural schematic diagram of the bending resistance and flame resistance assembly of the application;

[0037] Figure 8 is a mounting structural schematic diagram of the rubber capsule of the application;

[0038] Figure 9 is a mounting structural schematic diagram of the fixed pipe of the application;

[0039] Figure 10 This is a schematic diagram of the installation structure of the silicone sleeve of the present invention;

[0040] Figure 11 Schematic diagram of the installation structure of the support tube of the present invention;

[0041] Numbers in the figure: 1, conductor; 2, insulation layer;

[0042] 3. Protective pressure-resistant components; 301. Distribution tray; 302. Support ring; 303. Inner silicone sleeve; 304. Curved box; 305. Docking outer tube; 306. Docking inner tube; 307. Bending opening; 308. Assembly opening; 309. Disassembly opening; 310. Curved frame; 311. Card interface; 312. Connecting plate; 313. Elastic tube; 314. Curved spring; 315. Threaded tube; 316. Threaded rod; 317. Anti-bending spring; 318. Interlocking inner rail; 319. Interlocking outer rail; 320. Outer silicone sleeve; 321. Fire-resistant mica tape; 322. Rubber sleeve;

[0043] 4. Bend-resistant flame-retardant component; 401. Heat-conducting pipe; 402. Bending hole; 403. Elastic strip; 404. Fixing pipe; 405. Heat-conducting sleeve; 406. Supporting pipe; 407. Silicone sleeve; 408. Rubber bag; 409. Aluminum hydroxide powder; 410. Connecting ear; 411. Elastic frame. DETAILED DESCRIPTION

[0044] 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.

[0045] Example: Figures 1-11 As shown, the present invention provides a flame-retardant and fireproof 35kV aluminum alloy power cable technical solution, including a conductor 1, three conductors 1 are provided, the outer side of the conductor 1 is wrapped with an insulating layer 2, and the outer side of the insulating layer 2 is provided with a protective pressure-resistant component 3, the protective pressure-resistant component 3 includes a distribution plate 301, a support ring 302, an inner silicone sleeve 303, an arc box 304, a docking outer tube 305, a docking inner tube 306, a bending opening 307, an assembly opening 308, a disassembly opening 309, an arc frame 310, a card interface 311, a connecting plate 312, an elastic tube 313, an arc-shaped spring 314, a threaded tube 315, a threaded rod 316, an anti-bending spring 317, an interlocking inner rail 318, an interlocking outer rail 319, an outer silicone sleeve 320, a fire-resistant mica tape 321 and a rubber sleeve 322;

[0046] A plurality of distribution discs 301 are sleeved on the outer side of the insulation layer 2 at equal intervals, support rings 302 are welded on the outer side of the distribution discs 301, inner silica gel sleeves 303 are wrapped on the outer side of the support rings 302, a plurality of arc-shaped boxes 304 are arranged on the outer side of the inner silica gel sleeves 303, three butt-jointed outer pipes 305 are arranged at one end of the arc-shaped boxes 304, three butt-jointed inner pipes 306 are arranged at the other end of the arc-shaped boxes 304, the butt-jointed inner pipes 306 are embedded in the inner part of the adjacent butt-jointed outer pipes 305, the butt-jointed inner pipes 306 and the butt-jointed outer pipes 305 are connected through mutual cooperation, which facilitates the disassembly and assembly of the two arc-shaped boxes 304;

[0047] A locking inner rail 318 is arranged on one side of the arc-shaped box 304, a locking outer rail 319 is arranged on the other side of the arc-shaped box 304, the adjacent three arc-shaped boxes 304 are connected through the locking inner rail 318 and the locking outer rail 319, and the locking inner rail 318 is embedded in the inner part of the adjacent locking outer rail 319;

[0048] A plurality of assembly openings 308 are arranged in the arc-shaped box 304 at equal intervals, arc-shaped frames 310 are clamped in the assembly openings 308, the arc-shaped frame 310 is composed of two arc-shaped plates connected together, clamping interfaces 311 are arranged at both ends of the arc-shaped frame 310, the assembly openings 308 are embedded in the adjacent clamping interfaces 311 at both ends, when the arc-shaped frame 310 is installed, the clamping interface 311 at one end of the arc-shaped frame 310 is butt-jointed with one end of the assembly opening 308, then the arc-shaped frame 310 is bent, the clamping interface 311 at the other end of the arc-shaped frame 310 is butt-jointed with the other end of the assembly opening 308, the arc-shaped frame 310 is quickly installed, three elastic pipes 313 are connected to the arc-shaped frame 310 through a connecting plate 312 in the middle of the arc-shaped frame 310, and a threaded pipe 315 is connected to the elastic pipe 313 through two arc-shaped elastic sheets 314 in the middle of the elastic pipe 313;

[0049] Anti-bending springs 317 are connected between the threaded pipes 315 in the inner part of the adjacent two arc-shaped frames 310, threaded rods 316 are welded at both ends of the anti-bending springs 317, the threaded rods 316 and the adjacent threaded pipes 315 are connected through threaded holes, the anti-bending springs 317 are installed and disassembled through cooperation of the threaded rods 316 and the threaded pipes 315, when the cable is bent by external force, the anti-bending springs 317 are deformed, when the external force is removed, the anti-bending springs 317 rebound, and the cable returns to be straight;

[0050] A bending opening 307 is arranged in the middle of the arc-shaped box 304 and between the adjacent two assembly openings 308, the bending opening 307 is alternately composed of two arc-shaped notches, the bending openings 307 are distributed at equal intervals on the outer side of the arc-shaped box 304, the bending opening 307 can provide a bending space for the bending of the cable, so that the cable can be bent, three disassembly openings 309 are arranged on both sides of the assembly opening 308, the disassembly openings 309 can provide an operation space for the staff, and facilitate the installation and disassembly of the arc-shaped frame 310 and the anti-bending spring 317;

[0051] The outer side of the arc-shaped box 304 is wrapped with an outer silica gel sleeve 320, the outer side of the outer silica gel sleeve 320 is wound with a fire-resistant mica tape 321, the outer side of the fire-resistant mica tape 321 is wrapped with a rubber sleeve 322, the outer silica gel sleeve 320 and the inner silica gel sleeve 303 are both made of heat-conducting silica gel pads and have good heat-conducting performance, and the fire-resistant mica tape 321 can protect the inside of the electric wire and cable from being affected for a certain period of time when encountering external high temperature;

[0052] The rubber sleeve 322 is provided with a bend-resistant and fire-resistant assembly 4 in the center, which comprises a heat-conducting pipe 401, a bending hole 402, an elastic strip 403, a fixing pipe 404, a heat-conducting sleeve 405, a supporting pipe 406, a silica gel sleeve 407, a rubber capsule 408, aluminum hydroxide powder 409, a connecting lug 410 and an elastic frame 411;

[0053] The heat-conducting pipe 401 is embedded in the gap between the three conductors 1 in the center of the rubber sleeve 322, penetrates through the center of the distribution block 301, and is uniformly provided with the bending hole 402 on the outer side, which provides a bending space for the bending of the heat-conducting pipe 401, and the elastic strip 403 is embedded in the heat-conducting pipe 401;

[0054] The fixing pipe 404 is arranged on the outer side of the heat-conducting pipe 401 at both ends of the distribution block 301, a plurality of heat-conducting sleeves 405 and silica gel sleeves 407 are sleeved at equal intervals on the outer side of the heat-conducting pipe 401 between adjacent two distribution blocks 301, the supporting pipe 406 is welded on the outer side of the heat-conducting sleeve 405, and the supporting pipe 406 has the same longitudinal cross-sectional shape as the fixing pipe 404; and the silica gel sleeve 407 is also made of a heat-conducting silica gel pad;

[0055] Three rubber capsules 408 are arranged between adjacent two distribution blocks 301, and the rubber capsules 408 are located in the gap between the three conductors 1 and the inner silica gel sleeve 303; the rubber capsules 408 are filled with aluminum hydroxide powder 409 inside; aluminum hydroxide has a high specific heat capacity, can absorb a large amount of heat at high temperature, reduce the surface temperature of the material, and delay the combustion process; in the combustion process, aluminum hydroxide releases water vapor and carbon dioxide, which can dilute the oxygen concentration in the air, prevent the spread of flames, and a dense protective layer of aluminum hydroxide produced by the decomposition of aluminum hydroxide at high temperature can be formed on the surface of the material to isolate the contact between oxygen and combustible materials, thereby playing a barrier role and further enhancing the flame-retardant ability of the cable; three connecting lugs 410 are welded at equal intervals on both sides of the supporting ring 302, and the elastic frame 411 is connected between adjacent two supporting rings 302 through the connecting lug 410; the elastic frame 411 is in close contact with the adjacent rubber capsule 408; the elastic frame 411 and the elastic strip 403 are made of elastic rubber, so that the cable has sufficient toughness, and the elastic frame 411 can fix the rubber capsule 408 when the rubber capsule 408 is installed;

[0056] The split disc 301, the support ring 302, the arc-shaped box 304, the butt joint outer tube 305, the butt joint inner tube 306, the arc-shaped frame 310, the connecting plate 312, the elastic tube 313, the arc-shaped elastic sheet 314, the threaded tube 315, the threaded rod 316, the anti-bending spring 317, the interlocking inner rail 318, the interlocking outer rail 319, the heat-conducting tube 401, the fixed tube 404, the heat-conducting sleeve tube 405 and the support tube 406 can be made of aluminum alloy material. The strength of the aluminum alloy is greatly improved by adding alloy elements such as copper, magnesium and silicon, and the aluminum alloy can withstand greater external force and load. In addition, the toughness of the aluminum alloy is better than that of pure aluminum, and cracks or fractures are not easy to occur after bending, improving the reliability and safety of use, and also having good heat-conducting performance.

[0057] The working principle and use process of the present application are as follows: when the cable is subjected to external pressure, the external pressure acts on the outer silica gel sleeve 320, the arc-shaped box 304, the arc-shaped frame 310 and the inner silica gel sleeve 303, the outer silica gel sleeve 320, the inner silica gel sleeve 303, the arc-shaped box 304, the arc-shaped frame 310 and the anti-bending spring 317 are deformed to absorb the external force, reducing the influence of external force on the conductor 1, so that the cable can run stably, and under the action of external force, the elastic tube 313 and the arc-shaped elastic sheet 314 are deformed to further absorb the external force, further increasing the pressure resistance of the cable, and the adjacent three arc-shaped boxes 304 are connected by 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 puzzle interlocking structure, which has interlocking and stability, and the interlocking inner rail 318 and the interlocking outer rail 319 are locked with each other, so that the overall structure of the cable is more firm and not easy to collapse;

[0058] When the cable is bent, the arc-shaped elastic sheet 314 rebounds, the anti-bending spring 317 rebounds, and the arc-shaped box 304 returns to its original shape, so that the cable can still effectively absorb external force when the same part is subjected to external force next time, and the cable has strong pressure resistance and better toughness;

[0059] The split disc 301 and the support ring 302 can enhance the overall strength of the cable, and can provide strong support when the cable is subjected to external force, further increasing the pressure resistance of the cable, and the split disc 301 can limit the conductor 1 to avoid twisting of the conductor 1, and the cable has better anti-twisting ability;

[0060] When the cable is subjected to external force and bent, the elastic frame 411 and the elastic strip 403 are made of elastic rubber and have good elasticity, which is matched with the elasticity of the anti-bending spring 317, and the three elasticities are superimposed, so that the cable has excellent bending resistance;

[0061] The split disc 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 material, the outer silica gel sleeve 320 and the inner silica gel sleeve 303 are made of heat-conducting silica gel pad, and have good heat conduction performance. When the local working environment temperature of the cable is relatively high, the heat can be evenly distributed under the action of heat conduction, the heat dissipation capacity of the cable is strong, the heat-conducting tube 401, the heat-conducting sleeve 405, the support tube 406, and the silica gel sleeve 407 are located in the center of the cable, the support tube 406 and the silica gel sleeve 407 are in contact with the insulation layer 2, and the heat dissipation area of the conductor 1 is larger under the action of heat conduction, thereby further improving the heat dissipation capacity of the cable and the operation stability of the cable;

[0062] When the cable is in contact with the flame, the fire-resistant mica tape 321 preliminarily isolates the flame, thereby providing a reaction time for the power-off of the cable. When the flame enters the inside of the cable and contacts the aluminum hydroxide powder 409 in the inside of the rubber capsule 408, the aluminum hydroxide absorbs a large amount of heat at high temperature, reduces the surface temperature of the material, and delays the combustion process. In the combustion process, the aluminum hydroxide releases water vapor and carbon dioxide, which can dilute the oxygen concentration in the air, prevent the flame from spreading, and form a dense protective layer on the surface of the material to isolate the contact between oxygen and combustible materials, thereby further enhancing the flame-retardant capacity of the cable;

[0063] The support tube 406, the silica gel sleeve 407, and the rubber capsule 408 separate the conductor 1, and can prevent the insulation layer 2 from rubbing when the cable is extruded by external force, thereby protecting the insulation layer 2 on the outside of the conductor 1 and improving the compression resistance of the cable;

[0064] The arc-shaped box 304 is connected by 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 ignition position, the butt joint inner tube 306 and the butt joint outer tube 305 cooperate with each other, the interlocking inner rail 318 and the interlocking outer rail 319 cooperate with each other, the arc-shaped box 304 can be quickly replaced, the anti-bending spring 317 is connected by the cooperation of the threaded rod 316 and the threaded tube 315, and the installation and disassembly are convenient. When the rubber capsule 408 is installed, the elastic frame 411 fixes the rubber capsule 408, the whole cable is composed of modules, and the cable has good compression resistance, heat dissipation capacity, and flame-retardant capacity, and is more convenient to maintain.

[0065] Finally, it should be noted that the above only describes the preferred examples of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments, or some of the technical features thereof can be replaced equivalently, without departing from the spirit and principle of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flame retardant and fireproof 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), and 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 formed 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); The arc frame (310) is composed of two arc-shaped plates connected together. Both ends of the arc frame (310) are provided with card interfaces (311). Both ends of the assembly opening (308) are embedded in adjacent card interfaces (311). 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), and the threaded rods (316) are connected to the adjacent threaded tubes (315) via threaded holes; 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 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); A bend-resistant flame-retardant component (4) is provided at the center of the rubber sleeve (322), and the bend-resistant flame-retardant component (4) includes a heat-conducting pipe (401); The center of the rubber sleeve (322) is located in the gap between the three conductors (1), and a heat conducting pipe (401) is embedded therein. The heat conducting pipe (401) passes through the center of the distribution plate (301). Bend holes (402) are evenly opened on the outside of the heat conducting pipe (401). An elastic strip (403) is embedded in the middle of the heat conducting pipe (401). Fixed tubes (404) are provided at both ends of the distribution plate (301) outside the heat-conducting tube (401); a plurality of heat-conducting sleeves (405) and silicone sleeves (407) are sleeved at equal intervals between two adjacent distribution plates (301) outside the heat-conducting tube (401); a support tube (406) is welded to the outside of the heat-conducting sleeve (405); and the support tube (406) and the fixed tube (404) have the same longitudinal cross-sectional shape; Three rubber bags (408) are provided between two adjacent distribution plates (301). The rubber bags (408) are located in the gap between the three conductors (1) and the inner silicone sleeve (303). The rubber bags (408) are filled with aluminum hydroxide powder (409).

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

3. The flame retardant and fireproof 35kV aluminum alloy power cable 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 alternating arc-shaped notches. 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. The flame retardant and fireproof 35kV aluminum alloy power cable according to claim 1, characterized in that: Three connecting ears (410) are welded at equal intervals on both sides of the support ring (302), and an elastic frame (411) is connected between two adjacent support rings (302) through the connecting ears (410), and the elastic frame (411) fits with the adjacent rubber bags (408).

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