A corrosion-resistant and fire-resistant cable and its processing technology

Abstract

This invention belongs to the field of cable technology, specifically relating to a corrosion-resistant and fire-resistant cable and its processing technology. A corrosion-resistant and fire-resistant cable includes a cable core, with a shielding layer and a non-flame-retardant and corrosion-resistant sheath sequentially wrapped around the cable core. Gaps are reserved between the cable core, the shielding layer, and the non-flame-retardant and corrosion-resistant sheath. By weight, the raw materials for preparing the non-flame-retardant and corrosion-resistant sheath include 50-70 parts of ceramicized fire-resistant silicone rubber, 15-25 parts of hyperbranched acrylic resin, 20-30 parts of organosilicon-modified polyester resin, 25-35 parts of water-based fluorocarbon emulsion, 20-30 parts of isocyanate, 30-45 parts of biuret, 10-15 parts of flame retardant, 8-12 parts of graphite powder, 10-15 parts of silane coupling agent, and 30-40 parts of epoxidized triglyceride. The bonding strength between the non-flame-retardant and corrosion-resistant sheath and the asphalt anti-corrosion paint film in this application can improve the cable's corrosion resistance and durability.

Description

Technical Field

[0001] This invention belongs to the field of cable technology, specifically relating to a corrosion-resistant and fire-resistant cable and its processing technology. Background Technology

[0002] Cables are typically rope-like structures composed of several or groups of conductors, each group consisting of at least two conductors twisted together. Each group of conductors is insulated from the others and is often twisted around a central conductor, with the entire structure covered by a highly insulating outer layer. Cables are characterized by internal conductivity and external insulation, and are used to connect circuits and electrical appliances. With the development of the cable industry, higher and more stringent performance requirements have been placed on cable products to reduce accidents caused by cable problems and malfunctions during use. External corrosive substances, high temperatures, or open flames can damage traditional cables.

[0003] To improve the fire resistance and surface corrosion resistance of cables, CN 115966338 A discloses a corrosion-resistant and fire-resistant cable and its processing technology. The outer sheath consists of a light-shielding film, an asphalt anti-corrosion paint, and a rubber layer. By coating the outer wall of the rubber layer with asphalt anti-corrosion paint, the cable can be well protected. A light-shielding film is laid on the asphalt anti-corrosion paint, which can block light from the cable surface and reduce direct sunlight, thereby improving the surface corrosion resistance of the cable. In addition, by installing a non-woven bag containing a fire extinguishing agent in the inner lining layer, the fire resistance of the cable can be improved.

[0004] However, during the research process, the applicant discovered that when asphalt anti-corrosion paint is applied to the outer wall of the rubber layer, the bonding force between the single-component rubber layer and the asphalt anti-corrosion paint film is poor, which will affect the corrosion resistance and durability of the cable. Summary of the Invention

[0005] To improve the corrosion resistance and durability of cables, this application provides a corrosion-resistant and fire-resistant cable and its processing technology.

[0006] Firstly, this application provides a corrosion-resistant and fire-resistant cable, which is achieved using the following technical solution: A corrosion-resistant and fire-resistant cable includes a cable core, the cable core being wrapped with a shielding layer and a non-flame-retardant and corrosion-resistant sheath in sequence, with gaps reserved between the cable core, the shielding layer and the non-flame-retardant and corrosion-resistant sheath. By weight, the raw materials for preparing the non-flame-retardant and corrosion-resistant sheath include 50-70 parts of ceramicized fire-resistant and fire-resistant silicone rubber, 15-25 parts of hyperbranched acrylic resin, 20-30 parts of organosilicon-modified polyester resin, 25-35 parts of water-based fluorocarbon emulsion, 20-30 parts of isocyanate, 30-45 parts of biuret, 10-15 parts of flame retardant, 8-12 parts of graphite powder, 10-15 parts of silane coupling agent and 30-40 parts of epoxidized triglyceride.

[0007] By employing the above technical solutions, the combination of silicone-modified polyester resin and biuret can improve the corrosion resistance of the non-flame-retardant anti-corrosion sleeve. Hyperbranched acrylic resin, with its branched structure, can improve the adhesion of the non-flame-retardant anti-corrosion sleeve, thereby enhancing the bond between the sleeve and the asphalt anti-corrosion paint coating. The waterborne fluorocarbon emulsion, with its strong CF bond backbone, exhibits excellent corrosion resistance due to the high CF bond energy and the strong repulsive force of fluorine atoms on the carbon chain, resulting in a helical structure surrounded by fluorine atoms.

[0008] The combined action of hyperbranched acrylic resin and silicone-modified polyester resin not only improves the compatibility of flame retardants and ceramicized fire-resistant silicone rubber, thus enhancing the fire resistance of the cable, but also significantly improves the adhesion between the non-flame-retardant and corrosion-resistant sheath and the asphalt anti-corrosion coating, thereby enhancing the cable's corrosion resistance and durability. This is likely due to the reaction between water-based fluorocarbon emulsion, silicone-modified polyester resin, and isocyanate to generate a certain number of urethane bonds, which can improve the adhesion between the non-flame-retardant and corrosion-resistant sheath and the asphalt anti-corrosion coating.

[0009] The combined action of hyperbranched acrylic resin and water-based fluorocarbon emulsion enhances the adhesion between the non-flame-retardant and corrosion-resistant sheath and the asphalt anti-corrosion paint coating, thereby improving the cable's corrosion resistance and durability, as well as its fire resistance. This is because the hyperbranched structure of the acrylic resin allows the water-based fluorocarbon emulsion to adhere uniformly to the ceramicized fire-resistant silicone rubber surface, further improving the cable's fire resistance and corrosion resistance.

[0010] Ceramicized fire-resistant silicone rubber has the general properties of ordinary silicone rubber under normal conditions. At the same time, ceramicized fire-resistant silicone rubber can be rapidly sintered into a hard "ceramic" shell at temperatures of 600℃ and above, thereby endowing the material with excellent fire resistance, heat insulation, thermal shock resistance and other properties.

[0011] Graphite powder has a melting point above 3000℃, possesses high temperature resistance and high electrical conductivity, and exhibits excellent electrochemical corrosion protection, thus improving the corrosion resistance of cables.

[0012] Silane coupling agents can improve the dispersibility and bonding strength of graphite powder with ceramicized fire-resistant silicone rubber, hyperbranched acrylic resin, and organosilicon-modified polyester resin, making the graphite powder dispersed evenly, which is beneficial to improving the corrosion resistance of cables.

[0013] Preferably, the mass ratio of the hyperbranched acrylic resin to the silicone-modified polyester resin is 1:(1.2-1.25); more preferably, the mass ratio of the hyperbranched acrylic resin to the silicone-modified polyester resin is 1:1.25.

[0014] By adopting the above technical solution, the bonding force between the non-flame-retardant anti-corrosion sheath and the asphalt anti-corrosion paint coating is stronger, the corrosion resistance of the non-flame-retardant anti-corrosion sheath is also stronger, and the corrosion resistance of the cable is longer.

[0015] Preferably, the mass ratio of the hyperbranched acrylic resin to the aqueous fluorocarbon emulsion is 1:(1.4-1.5); more preferably, the mass ratio of the hyperbranched acrylic resin to the aqueous fluorocarbon emulsion is 1:1.5.

[0016] By adopting the above technical solutions, the cable has better corrosion resistance and fire resistance.

[0017] Preferably, the fluorine content of the aqueous fluorocarbon emulsion is 8-17 wt%.

[0018] By adopting the above technical solution, fluorine atoms possess the highest electronegativity and a small atomic radius, resulting in high bond energy of the CF bond, strong repulsive force between fluorine atoms on the carbon chain, and a helical structure surrounded by fluorine atoms. This provides excellent heat resistance and improves the cable's fire resistance. Furthermore, the fluorocarbon resin in the water-based fluorocarbon emulsion reacts with isocyanate to form a certain number of urethane bonds, enhancing the adhesion between the non-flame-retardant and corrosion-resistant sheath and the asphalt anti-corrosion paint coating, thereby improving the cable's corrosion resistance and durability.

[0019] Preferably, the fluorine content of the aqueous fluorocarbon emulsion is 13-17 wt%.

[0020] By adopting the above technical solutions, the heat resistance is better, and the water-based fluorocarbon emulsion adheres more evenly to the ceramicized fire-resistant silicone rubber surface, which improves the fire resistance of the cable. At the same time, the bonding force between the non-flame-retardant anti-corrosion sheath and the asphalt anti-corrosion paint coating is higher, thereby improving the corrosion resistance durability of the cable.

[0021] Preferably, the flame retardant is a mixture of ammonium polyphosphate, dimethyl methylphosphonate and magnesium oxide in a mass ratio of 1:(0.4-0.6):(1.2-1.8).

[0022] By adopting the above technical solution, ammonium polyphosphate produces extremely low smoke during combustion and does not generate hydrogen halides, making it environmentally friendly. When exposed to ablation or high temperatures, magnesium oxide forms a bridging effect with the amorphous residues produced by the cracking of ceramicized fire-resistant silicone rubber, further enhancing the cable's fire resistance. Furthermore, the flame retardant compounded from ammonium polyphosphate, dimethyl methylphosphonate, and magnesium oxide is more easily combined with ceramicized fire-resistant silicone rubber, hyperbranched acrylic resin, and silicone-modified polyester resin. This facilitates the synergistic effect of the hyperbranched acrylic resin and silicone-modified polyester resin, improving the cable's long-term corrosion resistance.

[0023] Preferably, the ammonium polyphosphate is ammonium polyphosphate APP2000.

[0024] By adopting the above technical solutions, ammonium polyphosphate APP2000 exhibits high polymerization degree, high flame retardancy, and good thermal stability, which can further improve the fire resistance of cables. Furthermore, ammonium polyphosphate APP2000 has good compatibility with ceramicized fire-retardant silicone rubber, hyperbranched acrylic resin, and organosilicon-modified polyester resin, which is beneficial to improving the corrosion resistance and longevity of cables.

[0025] Preferably, the shielding layer includes a metal sleeve, an isolation sleeve, and an oxygen-barrier fireproof layer.

[0026] Preferably, the cable core includes a conductor and an insulating layer surrounding the conductor.

[0027] Secondly, this application provides a processing technology for corrosion-resistant and fire-resistant cables, which is achieved using the following technical solution: A processing method for a corrosion-resistant and fire-resistant cable includes the following steps: Preparation of wire core: The raw materials for preparing wire core are heated and melted to obtain an alloy solution. The alloy solution is continuously cast and rolled to form a billet. The billet after continuous casting and rolling is drawn into wire, heat-treated and stranded to form a wire core. Cable core preparation: After wrapping an insulation layer around the cable core, the strands are twisted together to obtain the cable core; The cable core is wrapped with a shielding layer and a non-flame-retardant and corrosion-resistant sheath in sequence. Vacuum the gaps between the cable core, shielding layer and non-flame-retardant corrosion-resistant sheath; Spray asphalt anti-corrosion paint onto the surface of the non-flame-retardant anti-corrosion sheath.

[0028] In summary, this application has the following beneficial effects: 1. Hyperbranched acrylic resin has a branched structure, which improves the bonding force between the non-flame-retardant and corrosion-resistant sheath and the asphalt anti-corrosion paint coating. The combination of organosilicon-modified polyester resin and biuret can improve the corrosion resistance of the non-flame-retardant and corrosion-resistant sheath. The combined effect of hyperbranched acrylic resin and organosilicon-modified polyester resin significantly improves the corrosion resistance and durability of the cable. It can also improve the compatibility of flame retardants and ceramic fire-resistant silicone rubber, thereby improving the corrosion resistance and durability of the cable.

[0029] 2. The hyperbranched acrylic resin and water-based fluorocarbon emulsion work together. The hyperbranched structure of the hyperbranched acrylic resin allows the water-based fluorocarbon emulsion to adhere evenly to the ceramicized fire-resistant silicone rubber surface, improving the fire resistance of the cable. At the same time, it improves the bonding force between the non-flame-retardant and corrosion-resistant sheath and the asphalt anti-corrosion paint coating, thereby improving the cable's corrosion resistance and durability.

[0030] 3. This application preferably uses a water-based fluorocarbon emulsion with a fluorine content of 13-17 wt%, which has better heat resistance. The water-based fluorocarbon emulsion adheres more evenly to the ceramicized fire-resistant silicone rubber surface, improving the fire resistance of the cable. At the same time, the bonding force between the non-flame-retardant and anti-corrosion sheath and the asphalt anti-corrosion paint coating is high, thereby improving the corrosion resistance and durability of the cable.

[0031] 4. This application preferably uses a flame retardant composed of ammonium polyphosphate, dimethyl methylphosphonate and magnesium oxide, which further enhances the fire resistance of the cable and also facilitates the combined action of hyperbranched acrylic resin and silicone-modified polyester resin, thereby improving the corrosion resistance and durability of the cable to a certain extent. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the embodiments.

[0033] Preparation Example Preparation Examples 1-14 provide a non-flame-retardant and corrosion-resistant sheath. The following description uses Preparation Example 1 as an example.

[0034] The preparation steps for the non-flame-retardant and corrosion-resistant sheath provided in Example 1 are as follows: 500g of ceramicized fire-retardant silicone rubber, 150g of hyperbranched acrylic resin, 200g of organosilicon-modified polyester resin, 250g of water-based fluorocarbon emulsion, 200g of cyclohexyl isocyanate, 300g of biuret, 100g of ammonium polyphosphate APP1000, 80g of graphite powder with a particle size of 500 mesh, 100g of γ-aminopropyltriethoxysilane and 300g of epoxidized triglyceride were mixed evenly and plasticized for 2 hours. The mixture was then melted at 300℃ and injection molded (the inner diameter of the mold was 50mm and the wall thickness was 3mm). After cooling, a non-flame-retardant and corrosion-resistant sheath was obtained. Among them, the ceramicized fireproof and refractory silicone rubber is model TC 9711, which was purchased from Suzhou Wolxing Electronic Technology Co., Ltd. The hyperbranched acrylic resin, model HD-2280, was purchased from Changzhou Houding Chemical Co., Ltd. The silicone-modified polyester resin, model SJ-803, was purchased from Hubei Changyao Biotechnology Co., Ltd. The waterborne fluorocarbon emulsion, model HT-540FOH, with a fluorine content of 8-12wt%, was purchased from Beijing Runbo Hengtong Technology Co., Ltd.; the ammonium polyphosphate APP1000 was purchased from Jinan Haobang Chemical Co., Ltd.

[0035] Preparation Examples 2-6 differ from Preparation Example 1 only in that the quality of the raw materials used in the preparation of the non-flame-retardant and corrosion-resistant sheaths is different, as detailed in Table 1.

[0036] Table 1. Mass / g of each raw material used in Preparation Examples 1-6 Preparation Example 7 differs from Preparation Example 3 only in that the aqueous fluorocarbon emulsion is of model HT-530FOH, with a fluorine content of 13-17 wt%, and was purchased from Beijing Runbo Hengtong Technology Co., Ltd.

[0037] Preparation Example 8 differs from Preparation Example 3 only in that the aqueous fluorocarbon emulsion is of type HT-726FOH, with a fluorine content of 20-22 wt%, and was purchased from Beijing Runbo Hengtong Technology Co., Ltd.

[0038] Preparation Examples 9-13 differ from Preparation Example 7 only in that the composition of the flame retardant is different, as detailed in Table 2.

[0039] Table 2 Composition of flame retardants in Preparation Examples 7, 9-13 Preparation Example 14 differs from Preparation Example 11 only in that: the mass of ammonium polyphosphate APP1000 is replaced with ammonium polyphosphate APP2000 (purchased from Jinan Haobang Chemical Co., Ltd.).

[0040] Preparation of comparative examples Comparative Example 1 was prepared, which differed from Example 1 only in that the hyperbranched acrylic resin HD-2280 was replaced by an equal amount of silicone-modified polyester resin SJ-803.

[0041] Comparative Example 2 was prepared, which differed from Example 1 only in that the same amount of silicone-modified polyester resin SJ-803 was replaced with hyperbranched acrylic resin HD-2280.

[0042] Comparative Example 3 was prepared, which differed from Example 1 only in that the hyperbranched acrylic resin HD-2280 was replaced by an equal mass of waterborne fluorocarbon emulsion HT-540FOH.

[0043] Comparative Example 4 was prepared, which differed from Example 1 only in that the waterborne fluorocarbon emulsion HT-540FOH was replaced by hyperbranched acrylic resin HD-2280. Example

[0044] Examples 1-14 provide a corrosion-resistant and fire-resistant cable. The following description uses Example 1 as an example.

[0045] The corrosion-resistant and fire-resistant cable provided in Example 1 has the following processing steps: S1. Preparation of the wire core: S11. Mix 0.02 kg C, 1.19 kg Fe, 0.46 kg Mn, 0.25 kg Cr, 1.17 kg Ni, 2.99 kg Zn, 5.36 kg Cu, 0.14 kg Mo, 0.19 kg Ti, 0.03 kg Pd, 0.02 kg Pt, 0.02 kg Au, 0.14 kg Nd, 0.05 kg Ce, 0.02 kg Eu, 0.06 kg Lu and 88.59 kg Ag evenly, add to a furnace, and melt at 1580℃ for 6 hours to obtain an alloy solution; S12. The alloy solution prepared in S11 is continuously cast and rolled to form a billet with a diameter of 12 mm; S13. The billet prepared in S12 is drawn into wire and subjected to solution treatment at a temperature of 800℃. Bright tempering is then performed at 600℃ under a nitrogen protective atmosphere, followed by drawing into wires with a diameter of 2mm. S14. Heat and twist the three wires prepared in S13 to form a wire core; S2. Cable core preparation: An insulation layer is wrapped around the wire core prepared in S1, two wire cores are twisted together to form a conductor, and three conductors are used as the cable core. S3. The cable core prepared in S2 is wrapped with a metal sheath, an isolation sheath, an oxygen-barrier fireproof layer, and a non-flame-retardant and corrosion-resistant sheath in sequence. S4. Vacuum the gap reserved between the cable core, shielding layer and non-flame-retardant corrosion-resistant sheath; S5. Spray HBE382 thick-film epoxy coal tar anticorrosive paint (coating thickness 2mm) onto the surface of the non-flame-retardant anticorrosive sheath; wherein, the non-flame-retardant anticorrosive sheath is derived from Preparation Example 1; HBE382 thick-film epoxy coal tar anticorrosive paint was purchased from Yingde Huabin Coatings Co., Ltd.

[0046] Examples 2-14 differ from Example 1 only in that the source of the non-flame-retardant and corrosion-resistant sheaths is different, as detailed in Table 3.

[0047] Table 3 Sources of the non-flame-retardant and corrosion-resistant sheaths in Examples 1-14 Comparative Example Comparative Examples 1-4 differ from Example 1 only in that the source of the non-flame-retardant and corrosion-resistant sheaths is different, as detailed in Table 4.

[0048] Table 4. Sources of Non-Flame-Retardant Corrosion-Resistant Sheaths (Comparative Examples 1-4) Source of non-flame-retardant and corrosion-resistant sheath Preparation of Comparative Example 1 Preparation of Comparative Example 2 Preparation of Comparative Example 3 Preparation of Comparative Example 4 The performance testing was conducted on the corrosion-resistant and fire-resistant cables prepared in Examples 1-14 and Comparative Examples 1-4 of this application, and the following performance tests were performed.

[0049] 1. Corrosion resistance and durability: The corrosion-resistant and fire-resistant cables prepared in Examples 1-14 and Comparative Examples 1-4 of this application were placed in 10wt% hydrochloric acid and 20wt% sodium hydroxide aqueous solution and immersed at 25°C. The surface coating of the cable was observed to see if there was any peeling or cracking. The immersion time at which peeling and cracking began to appear was recorded. The test results are shown in Table 5.

[0050] 2. Fire resistance: The fire resistance limit of the corrosion-resistant and fire-resistant cables prepared in Examples 1-14 and Comparative Examples 1-4 of this application were tested according to GB / T 9978-1999 "Test Method for Fire Resistance of Building Components". The test results are shown in Table 5.

[0051] Table 5 Test Results The following section details this application based on the test data in Table 5.

[0052] The test data from Example 1 and Comparative Examples 1-2 show that the combined effect of hyperbranched acrylic resin and silicone-modified polyester resin significantly improves the corrosion resistance and durability of the cable.

[0053] The test data from Example 1 and Comparative Examples 3-4 show that the combined effect of hyperbranched acrylic resin and waterborne fluorocarbon emulsion significantly improves the corrosion resistance and durability of the cable.

[0054] The test data from Examples 3, 4, and 6 show that the mass ratio of hyperbranched acrylic resin to silicone-modified polyester resin in Example 3 is 1:1.25. The corresponding cable takes a relatively long time to start to peel off and crack after being immersed in 10wt% hydrochloric acid and 20wt% sodium hydroxide aqueous solution, indicating that the cable has good corrosion resistance and durability. The cable corresponding to Example 3 also has a long fire resistance limit.

[0055] The test data from Examples 3 and 5 and 6 show that the mass ratio of hyperbranched acrylic resin to waterborne fluorocarbon emulsion in Example 3 is 1:1.5, which corresponds to a longer fire resistance limit for the cable, indicating good fire resistance. Furthermore, the cable in Example 3 takes a long time to begin to peel off and crack after being immersed in a 10wt% hydrochloric acid and 20wt% sodium hydroxide aqueous solution, indicating good corrosion resistance.

[0056] The test data from Examples 3 and 7 and 8 show that the fluorine content of the aqueous fluorocarbon emulsion in Example 3 is 8-12 wt%, the fluorine content of the aqueous fluorocarbon emulsion in Example 7 is 13-17 wt%, and the fluorine content of the aqueous fluorocarbon emulsion in Example 8 is 20-22 wt%. The cable corresponding to Example 7 takes a long time to start to peel off and crack after being immersed in a 10 wt% hydrochloric acid and 20 wt% sodium hydroxide aqueous solution, indicating good corrosion resistance and durability. In addition, the cable corresponding to Example 7 also has a long fire resistance limit and good fire resistance.

[0057] The test data from Examples 7, 12-13 and Examples 9-11 show that the flame retardant compounded from ammonium polyphosphate, dimethyl methylphosphonate and magnesium oxide used in Examples 9-11 significantly improved the fire resistance limit of the cable and also improved the corrosion resistance durability of the cable to a certain extent.

[0058] The test data from Examples 11 and 14 show that Example 14 used ammonium polyphosphate APP2000, while Example 11 used ammonium polyphosphate APP1000. Ammonium polyphosphate APP2000 has a higher degree of polymerization and a more efficient flame-retardant effect, resulting in a higher fire resistance limit for the corresponding cable. This indicates that ammonium polyphosphate APP2000 improves the fire resistance of the cable. Furthermore, the cable in Example 14 takes a longer time to begin to peel off and crack after being immersed in a 10wt% hydrochloric acid and 20wt% sodium hydroxide aqueous solution, indicating that ammonium polyphosphate APP2000 can improve the corrosion resistance and durability of the cable to a certain extent.

[0059] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A corrosion-resistant and fire-resistant cable, comprising a cable core, wherein a shielding layer and a non-flame-retardant and corrosion-resistant sheath are sequentially wrapped around the outside of the cable core, the shielding layer, and the non-flame-retardant and corrosion-resistant sheath, wherein gaps are reserved between the cable core, the shielding layer, and the non-flame-retardant and corrosion-resistant sheath, characterized in that, The raw materials for preparing the non-flame-retardant and corrosion-resistant sheath, by weight, include 50-70 parts of ceramicized fire-retardant silicone rubber, 15-25 parts of hyperbranched acrylic resin, 20-30 parts of organosilicon-modified polyester resin, 25-35 parts of water-based fluorocarbon emulsion, 20-30 parts of isocyanate, 30-45 parts of biuret, 10-15 parts of flame retardant, 8-12 parts of graphite powder, 10-15 parts of silane coupling agent, and 30-40 parts of epoxidized triglyceride. The mass ratio of the hyperbranched acrylic resin to the organosilicon-modified polyester resin is 1:

1. The mass ratio of the hyperbranched acrylic resin to the waterborne fluorocarbon emulsion is 1:(1.4-1.5), the fluorine content of the waterborne fluorocarbon emulsion is 8-17wt%, the flame retardant is a mixture of ammonium polyphosphate, dimethyl methylphosphonate and magnesium oxide in a mass ratio of 1:(0.4-0.6):(1.2-1.8), the ammonium polyphosphate is ammonium polyphosphate APP2000, the shielding layer includes a metal sheath, an isolation sheath and an oxygen-barrier fireproof layer, and the cable core includes a wire core and an insulation layer wrapped around the wire core.

2. The corrosion-resistant and fire-resistant cable according to claim 1, characterized in that, The aqueous fluorocarbon emulsion has a fluorine content of 13-17 wt%.

3. A processing method for the corrosion-resistant and fire-resistant cable according to any one of claims 1-2, characterized in that, Includes the following steps: Preparation of wire core: The raw materials for preparing wire core are heated and melted to obtain an alloy solution. The alloy solution is continuously cast and rolled to form a billet. The billet after continuous casting and rolling is drawn into wire, heat-treated and stranded to form a wire core. Cable core preparation: After wrapping an insulation layer around the cable core, the strands are twisted together to obtain the cable core; The cable core is wrapped with a shielding layer and a non-flame-retardant and corrosion-resistant sheath in sequence. Vacuum the gaps between the cable core, shielding layer and non-flame-retardant corrosion-resistant sheath; Spray asphalt anti-corrosion paint onto the surface of the non-flame-retardant anti-corrosion sheath.

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