High-flexibility tear-resistant compartment bridging jumper wire capable of resisting temperature of 180 DEG C and used for rail transit

Abstract

The utility model relates to a temperature-resistant 180 DEG C high-flexibility tear-resistant compartment bridging jumper wire for rail transit, and belongs to the technical field of cables. According to the technical scheme, a plurality of tinned copper conductors are stranded together to form a wire core, and an isolation wrapping tape (3), an inner insulation layer (4), a reinforced mesh layer (5) and an outer insulation layer (6) are sequentially arranged outside the wire core; the tinned copper conductor consists of an inner conductor (1) and an outer conductor (2), and the outer conductor (2) is arranged outside the inner conductor (1); the inner conductor (1) is formed by twisting bare copper conductors, and the outer conductor (2) is formed by compositely twisting tinned conductors. According to the utility model, the low-smoke halogen-free flame-retardant performance of the cable is ensured; on the basis of ensuring good electrical insulation performance, the flexibility, the low-temperature resistance and the high-temperature resistance of the jumper wire are improved, and the aging resistance is improved; the comprehensive protection performance and tear resistance of the cable are improved, the cable has the comprehensive protection performance such as water resistance and corrosion resistance, the safety protection of the cable is improved, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to a 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit, which is a high-power, high-temperature-resistant and highly flexible special jumper for rail transit carriages and belongs to the technical field of cables. Background Art

[0002] Rail transit refers to transportation vehicles that run on specific tracks. Rail transit can be divided into subways, trams, light rails, and high-speed railways. In recent years, with the continuous development of social economy, the national rail transit has shown leapfrog development, and the demand for carriage jumper cables has also increased significantly. Carriage jumper cables are mainly used to provide power transmission between carriages. Due to the particularity of the use environment and location, higher requirements are placed on the cable's flexibility, tear resistance, and voltage resistance. Ordinary cables are prone to fatigue during long-term vehicle bumps and carriage twisting, resulting in a decrease in the insulation performance level. The insulation is easily torn, and the cable life cannot be guaranteed, affecting the long-term normal operation of the vehicle. The nominal cross-section of the jumper cable is generally 50mm 2 -240mm 2 . At present, the long-term operating temperature range of jumper cables is generally 90-120℃, the conductor is tinned copper Class 6 soft conductor, cross-linked polyolefin or flame-retardant silicone rubber insulation. The cable has a low temperature resistance level, poor flexibility, tensile strength, and aging resistance, and low comprehensive mechanical protection performance. Since this type of vehicle jumper cable is frequently moved in a special and harsh environment, the quality requirements for the cable are high. When the cable is repeatedly vibrated or twisted back and forth, the service life of the cable is often short. Utility Model Content

[0003] The utility model aims to provide a 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit. The cable is made by twisting bare copper and tinned copper wires, and is insulated by modified flame-retardant and high-temperature resistant silicone rubber. A layer of mesh low-smoke halogen-free tape is wrapped around the flame-retardant and high-temperature resistant silicone rubber insulation, which improves the cable's flexibility, conductivity and service life, and has good comprehensive protective properties such as aging resistance, high temperature resistance and tear resistance, thereby solving the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit, comprising a tinned copper conductor, an isolation wrapping tape, an inner insulation layer, a reinforced mesh layer and an outer insulation layer. A plurality of tinned copper conductor bundles are twisted together to form a wire core, and an isolation wrapping tape, an inner insulation layer, a reinforced mesh layer and an outer insulation layer are sequentially arranged outside the wire core; the tinned copper conductor consists of an inner conductor and an outer conductor, and an outer conductor is arranged outside the inner conductor; the inner conductor is formed by twisting bare copper conductors, and the outer conductor is formed by re-twisting tinned conductors.

[0006] The inner insulation layer and the outer insulation layer are both flame-retardant and high-temperature resistant silicone rubber insulation.

[0007] The plurality of tinned copper conductors are bundled together in a concentric twisted manner, the bundling direction is left-handed, and the bundling pitch is 18-20 times of the bundling diameter.

[0008] The inner conductor and the outer conductor are twisted in a concentric twisting manner, the twisting direction is right-handed, and the twisting pitch is 12-14 times the outer diameter of the twisting.

[0009] The number of the isolation wrapping tapes is three, and the wrapping directions are opposite.

[0010] The reinforcing mesh layer is a mesh wrapping tape.

[0011] The mesh wrapping tape is a mesh low-smoke halogen-free tape.

[0012] The beneficial effects of the utility model are:

[0013] 1. The tinned copper conductor is formed by twisting bare copper and tinned copper wire, which improves the flexibility of the cable, improves the conductivity, reduces the breakage of the cable conductor, and increases the service life of the cable;

[0014] 2. The tinned copper conductor is wrapped with three layers of isolation wrapping tape to prevent the insulation from penetrating into the gap of the tinned copper conductor during extrusion, and to ensure the low-smoke, halogen-free and flame-retardant performance of the cable;

[0015] 3. The inner insulation improves the flexibility and low and high temperature resistance of the jumper while ensuring good electrical insulation performance, and improves the aging resistance; a special reinforced mesh layer is wrapped around the surface of the inner insulation, and the outer layer of the reinforced mesh layer is extruded out of the outer insulation to ensure that the inner and outer insulation are firmly bonded to the mesh wrapping tape, and the insulation is not layered, which increases the comprehensive protection performance and tear resistance of the cable. At the same time, it has comprehensive protection properties such as waterproof and corrosion resistance, which improves the safety protection of the cable and increases the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] In the figure: inner conductor 1, outer conductor 2, isolation wrapping tape 3, inner insulation layer 4, reinforced mesh layer 5, outer insulation layer 6. DETAILED DESCRIPTION

[0018] The present invention will be further described below through examples in conjunction with the accompanying drawings.

[0019] A 180°C temperature-resistant, highly flexible, tear-resistant carriage jumper for rail transit, comprising a tinned copper conductor, an isolation wrapping tape 3, an inner insulation layer 4, a reinforced mesh layer 5 and an outer insulation layer 6. A plurality of tinned copper conductor bundles are twisted together to form a wire core, and an isolation wrapping tape 3, an inner insulation layer 4, a reinforced mesh layer 5 and an outer insulation layer 6 are sequentially arranged outside the wire core; the tinned copper conductor consists of an inner conductor 1 and an outer conductor 2, and the outer conductor 2 is arranged outside the inner conductor 1; the inner conductor 1 is formed by twisting bare copper conductors, and the outer conductor 2 is formed by re-twisting tinned conductors.

[0020] The inner insulation layer 4 and the outer insulation layer 6 are both flame-retardant and high-temperature resistant silicone rubber insulation.

[0021] The plurality of tinned copper conductors are bundled together in a concentric twisted manner, the bundling direction is left-handed, and the bundling pitch is 18-20 times of the bundling diameter.

[0022] The inner conductor 1 and the outer conductor 2 are twisted in a concentric twisting manner, the twisting direction is right-handed, and the twisting pitch is 12-14 times the outer diameter of the twisting.

[0023] The number of the isolation wrapping tapes 3 is three, and the wrapping directions are opposite.

[0024] The reinforced mesh layer is a mesh wrapping tape, and the mesh wrapping tape is a mesh low-smoke halogen-free tape.

[0025] The tinned copper conductor resistor is a Class 6 tinned soft copper conductor that complies with the GB / T3956 standard. It is made of 0.2mm single wire that is first bundled and then twisted. The outer diameter of the single wire is thinner than the 0.3mm required by GB / T3956. The specific process is to first bundle a number of tinned copper conductors together in a concentric twisted manner, with the bundling direction being left-handed and the bundling pitch being 18-20 times the bundled diameter, and then re-twisting them in a concentric twisted manner in a 1+6+ (12+18) regular twisted manner, with the re-twisting direction being right-handed and the re-twisting pitch being 12-14 times the re-twisting outer diameter. The 1+6 layers use a bare copper conductor re-twisting type, and keep the single wire the same as the outer layer. The 12+18 layers use a tinned conductor re-twisting type. Compared with tinned conductors, bare copper conductors have lower costs, and the conductor resistance will also be reduced accordingly, thereby enhancing the cable's conductivity. Compared with traditional Category 6 soft conductors, the copper conductor has a smaller single-filament diameter, a smaller twisting pitch, and a softer cable conductor that is less prone to wire breakage, which increases the service life of the cable.

[0026] The tinned copper conductor is wrapped with three layers of insulating wrapping tape 3 in opposite directions to ensure that the surface of the tinned copper conductor is round and the insulation extrusion thickness is uniform, thereby preventing the insulation from penetrating into the gaps of the tinned copper conductor during extrusion.

[0027] The isolation wrapping tape 3 is extruded with a layer of flame-retardant and high-temperature resistant silicone rubber insulation (inner insulation), which improves the flexibility and low-temperature resistance of the jumper and the aging resistance on the basis of ensuring good electrical insulation performance.

[0028] The inner insulation 4 is wrapped with a special mesh wrapping tape, and when the outer insulation 6 is extruded, it is ensured that the inner and outer insulations are firmly bonded to the mesh wrapping tape, and the insulation is not layered, thereby increasing the comprehensive protection performance and tear resistance of the cable.

[0029] The outer insulation 6 has good mechanical properties and comprehensive protective performance. With the reinforcement layer protection, the carriage jumper is suitable for various harsh environments. The enhanced insulation layer has excellent high tension, high pulling force, strong and aging resistance. It has high flexibility, wear resistance, cold resistance, oil resistance, water resistance, aging resistance, weather resistance and other characteristics that other materials cannot match. At the same time, it has many excellent functions such as high waterproofness and UV resistance. Compared with ordinary jumper jumpers, the cable temperature resistance level is increased, the insulation protection is strengthened, the safety protection of the cable is improved, and the service life of the cable is increased.

[0030] The utility model includes a tinned copper conductor, a three-layer isolation wrapping tape 3, an inner insulation layer 4, a reinforced mesh layer 5 and an outer insulation layer 6 from the inside to the outside. The center of the tinned copper conductor is made of 6 types of tinned copper conductors that are first bundled and then twisted. The inner layer is twisted with bare copper conductors, and the outer layer uses a double-twisted tinned conductor. This improves the electrical conductivity of the cable and also improves the flexibility of the cable, reduces the possible broken wires when the cable conductor is used, and increases the service life of the cable; the three-layer isolation wrapping tape 3 is wrapped around the outer core to prevent the insulation from penetrating into the gaps of the tinned copper conductor during extrusion, and the surface is rounded to ensure that the insulation extrusion thickness is uniform and consistent, and the low-smoke, halogen-free, flame-retardant and other mechanical properties of the cable are guaranteed; the inner insulation 4 improves the flexibility of the cable, reduces the broken wires of the cable conductor, and improves the high temperature resistance Energy; Strengthening the mesh layer 5 improves the flexibility of the cable, enhances the tear resistance of the insulation, improves the overall insulation performance, produces very low smoke when the mesh wrapping tape burns, and the combustion test enhances the light transmittance of the cable; Strengthen the outer layer of the mesh layer to extrude the outer insulation 6, the inner insulation 4 and the outer insulation 6 are both made of Wacker's flame-retardant and high-temperature resistant silicone rubber insulation, the double-layer insulation and the middle wrapped mesh wrapping tape are tightly bonded together to form a comprehensive protective layer, which not only has better mechanical properties such as wear resistance and low temperature resistance, but also has comprehensive protective properties such as waterproof and corrosion resistance, which improves the safety protection of the cable and increases the service life of the cable.

[0031] The utility model is suitable for the harsh environment between vehicle compartments, improves the temperature resistance level of the cable, can increase the current carrying capacity of the cable, improves the anti-aging performance of the cable, and prolongs the service life of the cable. This is an important electrical safety technical measure, an effective measure to ensure the normal operation of key electrical systems, and greatly improves the service life of the cable and the service life of the vehicle.

Claims

1. A 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit, characterized in that: The invention comprises a tinned copper conductor, an isolating wrapping tape (3), an inner insulation layer (4), a reinforced mesh layer (5) and an outer insulation layer (6); a plurality of tinned copper conductors are twisted together to form a wire core, and an isolating wrapping tape (3), an inner insulation layer (4), a reinforced mesh layer (5) and an outer insulation layer (6) are arranged in sequence outside the wire core; the tinned copper conductor comprises an inner conductor (1) and an outer conductor (2), and the outer conductor (2) is arranged outside the inner conductor (1); the inner conductor (1) is formed by twisting bare copper conductors, and the outer conductor (2) is formed by twisting tinned conductors.

2. According to claim 1, a 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit, characterized in that: The inner insulation layer (4) and the outer insulation layer (6) are both flame-retardant and high-temperature resistant silicone rubber insulation.

3. A 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit according to claim 1 or 2, characterized in that: The plurality of tinned copper conductors are bundled together in a concentric twisted manner, the bundling direction is left-handed, and the bundling pitch is 18-20 times of the bundling diameter.

4. According to claim 3, a 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit, characterized in that: The inner conductor (1) and the outer conductor (2) are twisted in a concentric twisting manner, the twisting direction is right-handed, and the twisting pitch is 12-14 times the twisting outer diameter.

5. A 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit according to claim 1 or 2, characterized in that: The number of the isolation wrapping tapes (3) is three, and the wrapping directions are opposite.

6. A 180°C temperature-resistant, highly flexible and tear-resistant carriage jumper for rail transit according to claim 1 or 2, characterized in that: The reinforced mesh layer is a mesh wrapping tape.

7. The high-flexibility, tear-resistant carriage jumper for rail transit with a temperature resistance of 180°C according to claim 6, characterized in that: The mesh wrapping tape is a mesh low-smoke halogen-free tape.

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