High-temperature-resistant tensile flexible ladle car special cable and manufacturing method thereof

Abstract

This invention discloses a high-temperature resistant, tensile-strength flexible steel-clad vehicle cable and its manufacturing method. From the inside out, it comprises: a central temperature-measuring unit, consisting of a temperature-measuring optical fiber and a polytetrafluoroethylene (PTFE) sheath surrounding it, centrally located along the cable axis; three power cores, evenly twisted and wrapped around the central temperature-measuring unit; each power core includes a concentrically twisted conductor and a modified silicone rubber insulation layer covering the conductor; a cabling wrapping tape wrapped around the three power cores to isolate the central temperature-measuring unit from external heat radiation; a first braided layer for electromagnetic shielding and tensile strength; a modified silicone rubber inner sheath to buffer dynamic stress in the first braided layer and prevent stress transmission to the central temperature-measuring unit; a second braided layer with a braiding direction opposite to the first braided layer, serving as the main tensile and puncture-resistant structure to prevent mechanical impact from being transmitted to the central temperature-measuring unit; and a TPU outer sheath made of polyether-type thermoplastic polyurethane material.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and more specifically, to a high-temperature resistant, tensile-strength flexible steel-clad vehicle cable and its manufacturing method. Background Technology

[0002] As a key mobile device in metallurgical production, ladle cars operate under extremely harsh conditions: they are continuously exposed to high-temperature radiation environments of 150-180℃ and can withstand thermal shocks of over 200℃ for short periods; they also need to withstand heavy traction forces and hundreds of high-frequency bending and dragging operations per day. Under these conditions, existing ladle car cables generally suffer from four major technical bottlenecks, which seriously restrict the continuity and safety of the production line.

[0003] First, it is difficult to balance tensile strength and flexibility in conductor structure. Although pure Category 5 soft conductors have good bending performance, the thinness and low strength of the single filaments make them prone to breakage under heavy traction and repeated bending, resulting in an actual service life of only 6 to 12 months. On the other hand, using Category 2 compacted conductors with single-layer braiding improves tensile strength, but significantly sacrifices flexibility, making it unable to adapt to the frequent turning and winding requirements of ladle cars, leading to early fatigue cracking.

[0004] Secondly, the insulation and sheathing materials suffer from insufficient temperature resistance and mechanical properties. Ordinary silicone rubber insulation has low tear strength and is prone to micro-cracks under the combined effects of high temperature and mechanical stress, leading to insulation breakdown. Ethylene propylene diene monomer (EPDM) sheaths have a long-term operating temperature of only about 120°C, far below the actual operating conditions of steel ladle cars, and rapidly age, harden, and crack when exposed to molten steel splashes or high-temperature radiation. Statistics show that insulation breakdown and sheath damage account for over 60% of cable failures, making them the primary cause of cable failures.

[0005] Third, there is a lack of built-in, accurate temperature measurement methods suitable for extreme operating conditions. Externally installed temperature sensors are prone to detachment under high-temperature vibration environments, while infrared thermometry is affected by smoke, steam, and surface emissivity, with errors generally exceeding ±5℃, failing to reflect the true temperature of the conductor. Although distributed fiber optic temperature measurement (DTS) technology has been applied in other fields, directly transplanting it to steel ladle car cables faces several unresolved challenges: First, cable manufacturing requires a high-temperature vulcanization process above 180℃, during which conventional fiber coatings (such as acrylate) are prone to carbonization and embrittlement, leading to signal attenuation or even fiber breakage; Second, under high-frequency bending conditions, if the fiber is bonded to surrounding materials, it will bear additional shear stress, accelerating fatigue fracture, and signal stability is difficult to guarantee; Third, if the temperature-sensing fiber is positioned off-center from the core area of ​​the conductor, the ambient temperature difference under high-temperature radiation will cause significant temperature drift, resulting in severely distorted temperature measurement results; Fourth, the existing cable structure does not have dedicated protection for the fiber, exposing it directly to molten steel splashes, ground friction, and mechanical impacts from the braided layer, resulting in extremely low reliability.

[0006] Finally, the mechanical protection structure is poorly designed. Traditional single-layer braided layers (usually tin-plated copper wire or stainless steel wire) are mainly used for electromagnetic shielding. They lack coordinated design with the inner insulation / sheath. The ends of the braided wires are prone to slippage and puncture the inner layer during dynamic bending, causing the sheath to wear out within 3 to 6 months. More importantly, the existing structure does not consider stress isolation and physical protection for the built-in temperature sensing element. Once the sheath is damaged, a chain of faults spreads rapidly.

[0007] In summary, there is an urgent need to develop a high-temperature resistant, tensile-strength flexible steel-clad vehicle-specific cable to systematically solve the contradiction between high flexibility and high tensile strength, break through the limits of material temperature resistance and tear resistance, overcome the integration challenges of fiber optic temperature measurement under high-temperature vulcanization and high-frequency bending, and construct a multi-level collaborative protection system to achieve long-term, reliable, and accurate temperature monitoring and power transmission under extreme working conditions. Summary of the Invention

[0008] The purpose of this invention is to provide a high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable and its manufacturing method, overcoming the aforementioned defects in the prior art.

[0009] A high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable and its manufacturing method, comprising, from the inside out: The central temperature measurement unit consists of a temperature-measuring optical fiber and a polytetrafluoroethylene sheath covering its outer periphery, and is centrally located along the cable axis. The power core consists of three wires, which are evenly twisted and wrapped around the outer periphery of the central temperature measuring unit; the power core includes a concentrically twisted conductor and a modified silicone rubber insulation layer covering the conductor. The cabling wrapping tape is wrapped around the three power cores to isolate the influence of external heat radiation on the central temperature measuring unit. The first braided layer, covering the cabling wrapping tape, is used for electromagnetic shielding and to assist in tensile strength; A modified silicone rubber inner sheath is wrapped around the first braided layer to buffer the dynamic stress of the first braided layer and prevent stress from being transmitted to the central temperature measuring unit. The second braided layer, with a braiding direction opposite to that of the first braided layer, serves as the main tensile and puncture-resistant structure to prevent mechanical impact from being transmitted to the central temperature measuring unit. The TPU outer sheath, covering the second woven layer, is made of polyether-type thermoplastic polyurethane material.

[0010] Furthermore, the conductor core is composed of a central steel wire and soft copper wire. The soft copper wire conforms to the Class 5 conductor standard specified in GB / T 3956. Through concentric twisting, it disperses mechanical stress and provides basic stress buffer for the central temperature measuring unit.

[0011] Furthermore, the surface of the modified silicone rubber insulation layer is coated with a silicone oil insulating layer to achieve low adhesion characteristics and avoid adhesion to the central temperature measuring unit.

[0012] Furthermore, the cabling is filled with low-smoke, halogen-free, flame-retardant filler rope, and the outer layer is wrapped with silicone glass fiber tape.

[0013] Furthermore, the first braided layer is woven from tin-plated copper wire.

[0014] Furthermore, the modified silicone rubber inner sheath includes an inner sheath and a layer of silicone grease barrier coated on the surface of the inner sheath.

[0015] Furthermore, the second braided layer is woven from high-carbon steel wire with a galvanized or zinc-aluminum-rare earth alloy coating.

[0016] A method for manufacturing a high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable. S1. Preparation Center Temperature Measurement Unit: A temperature-sensing optical fiber with a diameter of 0.6 mm is selected and an outer sheath of 0.4 mm thick polytetrafluoroethylene is extruded to form an independent temperature-sensing unit with an outer diameter of 1.4 mm; the low surface energy characteristics of polytetrafluoroethylene are utilized to achieve no bonding with the surrounding structure. S2. Preparation of the wire core conductor: A high-carbon galvanized steel wire with a diameter of 0.3 mm was used as the central reinforcing core. The outer layer used T2 soft copper wire with a single wire diameter of 0.15 mm. The wires were first bundled into 19 strands / bundle with a bundle diameter of 0.75 mm and a bundle pitch of 6 mm. Then, 7 bundles were concentrically twisted around the central steel wire to form a composite conductor with a cross-sectional area of ​​25 mm². The total twist pitch was 18 mm, the compression coefficient was controlled at 0.84, and the outer diameter after compression was 6.4 mm. Three such conductor cores were prepared. S3. Extruded modified silicone rubber insulation layer: Methyl vinyl silicone rubber raw rubber, fumed silica, hydroxyl silicone oil, high-temperature resistant additives and vulcanizing agents are mixed in a mass ratio of 75:18:4:3:1.5, extruded and coated onto the conductor to form a 1.2 mm thick insulation layer, and coated with a 0.08 mm silicone oil isolation layer to obtain a power wire core with an outer diameter of 8.8 mm. S4. Cable assembly and high-temperature insulation tape wrapping: Three power cores are evenly wrapped around the central temperature measuring unit in a right-hand cabling process with a cabling pitch of 120 mm. The gaps between the cores are filled with low-smoke halogen-free flame-retardant filler rope. Then, an alkali-free glass fiber tape coated with silicone resin is wrapped around the outer periphery with an overlap rate of 30%, forming a cabling wrap with an outer diameter of 11.5 mm. S5. Weave the first weave layer: Tinned copper wire with a diameter of 0.18 mm is used and braided under a constant tension of 5~8 N. The braiding density is 88%, the braiding angle is 40°, and the pitch is 40 mm to form the first braided layer, which has both electromagnetic shielding and auxiliary tensile strength functions. The outer diameter after braiding is 12.3 mm. S6. Extruded modified silicone rubber inner sheath: 70 parts of methyl vinyl silicone rubber raw rubber, 15 parts of fumed silica, 6 parts of elastic reinforcing agent and 1.5 parts of vulcanizing agent were mixed evenly. An inner sheath with a thickness of 1.2 mm was extruded outside the first braided layer using an extrusion tube process. A silicone grease isolation layer with a thickness of 0.05 mm was coated on its inner surface. The outer diameter after extrusion was 14.7 mm. S7. Weave the second weave layer: High-carbon steel wire with a zinc-5% aluminum-rare earth alloy coating and a diameter of 0.35 mm is used. It is braided on the outside of the inner sheath in a left-right reverse manner. The tension is controlled at 8~12 N, the braiding density is 68%, the braiding angle is 45°, the pitch is 50 mm, and the outer diameter after braiding is 15.5 mm. S8. Extruded TPU outer sheath: Polyether-type TPU, halogen-free flame retardant, anti-wear agent, high-temperature modifier and antioxidant are mixed in a mass ratio of 80:12:4:3:1.5, extruded and covered with a 2.5 mm thick outer sheath, and the surface is embossed with a diamond pattern. The outer diameter of the finished product is 20.5 mm.

[0017] Furthermore, in step S3, the three power cores are evenly distributed around the central temperature measuring unit, ensuring that the temperature measuring optical fiber and each of the power cores are in close contact, thereby improving the temperature measuring accuracy to within ±0.5℃.

[0018] Furthermore, the first braided layer and the second braided layer adopt opposite braiding directions, and a silicone oil or silicone grease isolation layer is provided in the middle, which together form a stress buffer structure to prevent the braided filaments from slipping and puncturing the inner layer, and to block the transmission path of external mechanical impact to the central temperature measuring unit.

[0019] By adopting the above technical solution, the present invention has the following beneficial effects: (1) This invention achieves the organic integration of high flexibility, strong tensile strength, high temperature resistance, wear resistance and accurate temperature measurement functions by constructing an integrated cable structure of "central temperature measuring unit + three surrounding power cores + double-layer reverse braiding + multi-level isolation protection". This structure ensures that the temperature measuring unit is always in the center of the conductor's thermal field and is protected by multiple physical layers, fundamentally solving the high failure rate problem caused by insulation breakdown, sheath wear and temperature measurement failure of traditional steel-clad truck cables, and significantly improving the system reliability and service life.

[0020] (2) This invention uses a concentric stranded conductor consisting of a central high-carbon galvanized steel wire and five types of ultra-fine soft copper wire. While ensuring the overall tensile strength of the conductor (≥1500 N), the high flexibility of the five types of conductors is utilized to adapt to high-frequency bending conditions. This structure effectively disperses mechanical stress, avoids wire breakage of the pure soft conductor or brittle fracture of the compressed conductor, and provides primary buffer support for the embedded temperature measuring unit, extending the conductor life to more than 2 years.

[0021] (3) The present invention coats a silicone oil insulating layer on the surface of the modified silicone rubber insulation layer, which significantly reduces the interfacial adhesion between the modified silicone rubber insulation layer and the PTFE sheath temperature measuring unit. This design prevents interlayer adhesion of the cable during high-temperature vulcanization or long-term operation, avoids fiber micro-bending loss or breakage due to shear stress concentration during bending, and ensures long-term stable transmission of temperature measuring signals.

[0022] (4) By filling the cable core with low-smoke halogen-free flame-retardant filler rope and wrapping it with coated silica glass fiber tape, this invention not only maintains the roundness of the cable core and improves the flame-retardant safety, but more importantly, it utilizes the temperature resistance of glass fiber tape ≥250℃ to form an effective thermal barrier between the power core and the external high-temperature environment, preventing the radiant heat of molten steel from being directly conducted to the central temperature measuring unit, and ensuring that its working temperature is within a safe range.

[0023] (5) The present invention uses tin-plated copper wire to form the first braided layer, which has both excellent electromagnetic shielding performance (suppressing frequency converter interference) and certain auxiliary tensile strength. At the same time, the tin plating layer improves oxidation resistance and welding compatibility, making it suitable for complex electromagnetic environments in metallurgical sites and ensuring the stability of signal and power transmission.

[0024] (6) The present invention adds a silicone grease isolation layer on the inner surface of the modified silicone rubber inner sheath, which further strengthens the sliding interface between the braided layer and the inner sheath. This layer effectively absorbs and buffers the radial and axial stress generated by the first braided layer during dynamic bending, and prevents stress waves from being transmitted to the fragile internal temperature-sensing optical fiber. It is a key measure to achieve compatibility between "braided protection" and "optical fiber protection".

[0025] (7) The present invention uses high-carbon steel wire with zinc-5% aluminum-rare earth alloy coating as the second braiding layer material, which significantly improves corrosion resistance, fatigue resistance and wear resistance compared with ordinary galvanized steel wire. This layer undertakes the main tensile strength and puncture resistance functions, and can resist ground friction, metal scratching and molten steel splash impact, greatly extending the service life of the sheath to more than 24 months.

[0026] (8) The manufacturing method of this invention ensures the coordinated operation of each functional layer by precisely controlling the material ratio, structural dimensions, stranding pitch, braiding tension and extrusion process parameters. In particular, the independent preparation of PTFE sheathed optical fiber, the stress-complementary design of double-layer reverse braiding and the introduction of multi-level isolation layers enable the cable to maintain the internal structural integrity and temperature measurement function after high-temperature vulcanization (190°C), solving the problem of incompatibility between optical fiber and cable processes.

[0027] (9) In this invention, three power wire cores are evenly arranged around the central temperature measuring unit, so that the temperature measuring optical fiber is close to the core area of ​​the conductor's heat generation, which greatly shortens the heat conduction path. This layout effectively eliminates the temperature drift caused by the ambient radiation temperature difference, and improves the actual temperature measurement accuracy to within ±0.5℃, which is far superior to infrared temperature measurement (±5℃), providing a reliable data basis for overload early warning and predictive maintenance.

[0028] (10) The first and second braided layers of this invention adopt opposite braiding directions and are combined with an intermediate silicone grease / silicone oil isolation layer to form a dual buffer mechanism of "stress cancellation + interface slippage". This design not only eliminates the common problem of filament slippage puncturing the inner layer in single-layer braiding, but also dissipates the external mechanical impact energy at the double-layer braiding interface, completely blocking its transmission path to the central temperature measuring unit, and realizing physical protection for the entire life cycle of the optical fiber. Attached Figure Description

[0029] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the structure of the special cable of the present invention.

[0030] The labels in the attached diagram are: 1. Central temperature measuring unit; 2. Core conductor; 3. Modified silicone rubber insulation layer; 4. Cable wrapping tape; 5. First braided layer; 6. Modified silicone rubber inner sheath; 7. Second braided layer; 8. TPU outer sheath. Detailed Implementation

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] For experiments not specifically described in the examples, the procedures or conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.

[0033] Example 1: This example provides a high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable and its manufacturing method. The specific structure and process are as follows: The central temperature sensing unit 1 is composed of distributed temperature sensing optical fibers with a diameter of 0.6 mm. Its outer periphery is covered with a 0.4 mm thick polytetrafluoroethylene (PTFE) sheath through an extrusion process, forming an independent unit with an outer diameter of 1.4 mm. This PTFE sheath has extremely low surface energy and excellent high-temperature resistance (long-term operating temperature -200℃~260℃), ensuring that the central temperature sensing unit 1 does not bond with the surrounding structure during subsequent high-temperature vulcanization and high-frequency bending processes, avoiding fiber breakage or signal instability caused by interfacial shear stress.

[0034] The conductor 2 adopts a composite structure: a high-carbon galvanized steel wire with a diameter of 0.3 mm and a tensile strength of 1570 MPa serves as the central reinforcing core, while the outer layer uses a Class 5 soft conductor conforming to GB / T 3956 standard, namely T2 oxygen-free soft copper wire with a single wire diameter of 0.15 mm. First, the soft copper wire bundle is twisted into 19 strands / bundle (bundle diameter 0.75 mm, bundle pitch 6 mm). Then, 7 bundles are concentrically twisted around the central steel wire, with a total twist pitch of 18 mm and a compression factor controlled at 0.84, ultimately forming a composite conductor with a cross-sectional area of ​​25 mm² and an outer diameter of 6.4 mm. Three conductors 2 are prepared for subsequent cabling.

[0035] The modified silicone rubber insulation layer 3 is prepared by mixing 75 parts of methyl vinyl silicone rubber raw rubber, 18 parts of fumed silica, 4 parts of hydroxyl silicone oil, 3 parts of high-temperature resistant additives, and 1.5 parts of vulcanizing agent to obtain an insulating compound. This compound is then applied to each conductor core 2 using an extrusion process, with a thickness of 1.2 mm. After extrusion, a 0.08 mm thick silicone oil insulating layer is coated on the surface of the insulation layer to achieve low adhesion characteristics and prevent adhesion to the central temperature sensing unit 1. The resulting power conductor core has an outer diameter of 8.8 mm and is marked with numbers 1 to 3.

[0036] The preparation of the cabling wrapping tape 4 includes: uniformly wrapping three power cores around the central temperature measuring unit 1 in a right-hand direction, with a cabling pitch of 120 mm; filling the gaps between the cores with low-smoke halogen-free flame-retardant filler rope to ensure roundness; and then wrapping a layer of alkali-free glass fiber tape coated with silicone resin around the outer perimeter, with an overlap rate of 30%. This wrapping tape has a temperature resistance rating of ≥250℃, effectively isolating the influence of external heat radiation on the central temperature measuring unit 1, and the outer diameter after cabling is 11.5 mm.

[0037] The first braided layer 5 uses tin-plated copper wire with a diameter of 0.18 mm, braided under a constant tension of 5–8 N, with a braiding density of 88%, a braiding angle of 40°, and a pitch of 40 mm. This layer has both electromagnetic shielding function and auxiliary tensile strength, while also providing primary mechanical protection for the internal structure. The outer diameter after braiding is 12.3 mm.

[0038] The modified silicone rubber inner sheath 6 is made from 70 parts of methyl vinyl silicone rubber raw rubber, 15 parts of fumed silica, 6 parts of elastic reinforcing agent, and 1.5 parts of vulcanizing agent. It is then extruded over the first braided layer 5, with a thickness of 1.2 mm. After extrusion, a 0.05 mm thick silicone grease insulating layer is coated on its inner surface (the side facing the first braided layer 5) to buffer the radial stress generated during dynamic bending of the first braided layer 5 and prevent stress transmission to the central temperature sensing unit 1. The outer diameter of the inner sheath 6 after extrusion is 14.7 mm.

[0039] The second braided layer 7 uses 0.35 mm diameter zinc-5% aluminum-rare earth alloy coated high-carbon steel wire, braided in a left-right reverse direction outside the modified silicone rubber inner sheath 6, with tension controlled at 8-12 N, braid density at 68%, braid angle at 45°, and pitch at 50 mm. This layer serves as the main tensile and puncture-resistant structure. Its braiding direction is opposite to that of the first braided layer 5. Combined with the intermediate silicone grease isolation layer, it forms a stress buffer system of "reverse braiding + interface slippage," effectively preventing the braided wires from slipping and puncturing the inner layer, and blocking the transmission path of external mechanical impact to the central temperature measuring unit 1. The outer diameter after braiding is 15.5 mm.

[0040] The TPU outer sheath 8 is made from 80 parts of polyether-type thermoplastic polyurethane base material, 12 parts of halogen-free flame retardant, 4 parts of anti-abrasion agent, 3 parts of high-temperature modifier, and 1.5 parts of antioxidant. It is applied to the second braided layer 7 using an extrusion process, with a thickness of 2.5 mm. During extrusion, a diamond-shaped embossed structure is simultaneously formed on the sheath surface to enhance abrasion resistance and tear resistance. The extrusion temperature is controlled at 190℃, and the finished cable has an outer diameter of 20.5 mm.

[0041] The cable manufactured using the above process operated continuously for 24 months under actual ladle car conditions (ambient temperature 150–180℃, short-term 200℃, and over 500 bends per day) without any wire breakage, sheath wear, or temperature measurement failure. The temperature measurement system's measured accuracy remained stable within ±0.5℃, far superior to traditional infrared temperature measurement (±5℃). It achieved a tensile strength of 1520 N, a bending life exceeding 2 million cycles, and an overall failure rate of less than 10%, significantly outperforming existing products.

[0042] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable, characterized in that, From the inside out, the following are included: The central temperature measuring unit (1) consists of a temperature measuring optical fiber and a polytetrafluoroethylene sheath covering its outer periphery, and is centrally located along the cable axis. The power core has three strands that are evenly twisted around the outer periphery of the central temperature measuring unit (1); the power core includes a concentrically twisted conductor (2) and a modified silicone rubber insulation layer (3) covering the conductor (2). The cabling wrapping tape (4) is wrapped around the three power cores to isolate the influence of external heat radiation on the central temperature measuring unit (1); The first braided layer (5) covers the outside of the cabling wrapping tape (4) and is used for electromagnetic shielding and to assist in tensile strength. A modified silicone rubber inner sheath (6) is wrapped around the first braided layer (5) to buffer the dynamic stress of the first braided layer (5) and prevent stress from being transmitted to the central temperature measuring unit (1). The second braided layer (7) has a braiding direction opposite to that of the first braided layer. It serves as the main tensile and puncture-resistant structure to prevent mechanical impact from being transmitted to the central temperature measuring unit (1). The TPU outer sheath (8) covers the second woven layer (7) and is made of polyether-type thermoplastic polyurethane material.

2. The high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 1, characterized in that, The conductor core (2) is composed of a central steel wire and a soft copper wire. The soft copper wire conforms to the Class 5 conductor standard specified in GB / T 3956. It disperses mechanical stress through concentric twisting and provides basic stress buffer for the central temperature measuring unit (1).

3. The high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 2, characterized in that, The modified silicone rubber insulation layer (3) is coated with a silicone oil isolation layer to achieve low adhesion characteristics and avoid adhesion to the central temperature measuring unit (1).

4. The high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 1, characterized in that, The cable wrapping tape (4) is filled with low-smoke halogen-free flame-retardant filler rope, and the outer layer is wrapped with silicone glass fiber tape.

5. The high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 1, characterized in that, The first braided layer (5) is woven from tin-plated copper wire.

6. The high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 1, characterized in that, The modified silicone rubber inner sheath (6) includes an inner sheath and a layer of silicone grease isolation layer coated on the surface of the inner sheath.

7. The high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 1, characterized in that, The second braided layer (7) is woven from high-carbon steel wire with galvanized or zinc-aluminum-rare earth alloy coating.

8. A method for manufacturing a high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable, characterized in that, S1. Preparation center temperature measurement unit (1): A temperature-sensing optical fiber with a diameter of 0.6 mm is selected and an outer sheath of 0.4 mm thick polytetrafluoroethylene is extruded to form an independent temperature-sensing unit with an outer diameter of 1.4 mm; the low surface energy characteristics of polytetrafluoroethylene are utilized to achieve no bonding with the surrounding structure. S2. Preparation of the wire core conductor (2): Using a high-carbon galvanized steel wire with a diameter of 0.3 mm as the central reinforcing core, and a T2 soft copper wire with a single wire diameter of 0.15 mm as the outer layer, the wires are first bundled into 19 strands / bundle with a bundle diameter of 0.75 mm and a bundle pitch of 6 mm. Then, 7 bundles are concentrically twisted around the central steel wire to form a composite conductor with a cross-sectional area of ​​25 mm², a total twist pitch of 18 mm, a compression coefficient controlled at 0.84, and an outer diameter of 6.4 mm after compression. Three such conductor cores (2) are prepared. S3. Extruded modified silicone rubber insulation layer (3): Methyl vinyl silicone rubber raw rubber, fumed silica, hydroxyl silicone oil, high-temperature resistant additives and vulcanizing agents are mixed in a mass ratio of 75:18:4:3:1.5, extruded and coated onto the conductor to form a 1.2 mm thick insulation layer, and coated with a 0.08 mm silicone oil isolation layer to obtain a power wire core with an outer diameter of 8.8 mm. S4. Cable assembly and high-temperature insulation tape wrapping: Three power cores are evenly wrapped around the central temperature measuring unit (1) and cabled in a right-hand direction with a cable pitch of 120 mm. The gaps between the cable cores are filled with low-smoke halogen-free flame-retardant filler rope. Then, an alkali-free glass fiber tape coated with silicone resin is wrapped around the outer periphery with an overlap rate of 30% to form a cable wrapping tape (4) with an outer diameter of 11.5 mm. S5. Weave the first weave layer (5): Tinned copper wire with a diameter of 0.18 mm was used and braided under a constant tension of 5~8 N. The braiding density was 88%, the braiding angle was 40°, and the pitch was 40 mm to form the first braided layer (5) which has both electromagnetic shielding and auxiliary tensile strength functions. The outer diameter after braiding was 12.3 mm. S6. Extruded modified silicone rubber inner sheath (6): 70 parts of methyl vinyl silicone rubber raw rubber, 15 parts of fumed silica, 6 parts of elastic reinforcing agent and 1.5 parts of vulcanizing agent were mixed evenly, and an inner sheath with a thickness of 1.2 mm was extruded outside the first braided layer (5) using an extrusion tube process, and a silicone grease isolation layer with a thickness of 0.05 mm was coated on its inner surface. The outer diameter after extrusion was 14.7 mm. S7. Weave the second weave layer (7): High-carbon steel wire with a zinc-5% aluminum-rare earth alloy coating and a diameter of 0.35 mm is used. It is braided on the outside of the inner sheath in a left-right reverse manner. The tension is controlled at 8~12 N, the braiding density is 68%, the braiding angle is 45°, the pitch is 50 mm, and the outer diameter after braiding is 15.5 mm. S8. Extruded TPU outer sheath (8): Polyether-type TPU, halogen-free flame retardant, anti-wear agent, high-temperature modifier and antioxidant are mixed in a mass ratio of 80:12:4:3:1.5, extruded and covered with a 2.5 mm thick outer sheath, and the surface is embossed with a diamond pattern. The outer diameter of the finished product is 20.5 mm.

9. The method for manufacturing a high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 8, characterized in that, In step S3, the three power cores are evenly distributed around the central temperature measuring unit, ensuring that the temperature measuring optical fiber and each of the power cores are in close contact, thereby improving the temperature measuring accuracy to within ±0.5℃.

10. The method for manufacturing a high-temperature resistant, tensile-strength, flexible steel-clad vehicle-specific cable according to claim 8, characterized in that, The first braided layer (5) and the second braided layer (7) adopt opposite braiding directions and are provided with a silicone oil or silicone grease isolation layer in the middle, which together form a stress buffer structure to prevent the braided yarn from slipping and puncturing the inner layer, and to block the transmission path of external mechanical impact to the central temperature measuring unit (1).

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