Comprehensive railway signal cable

Abstract

The utility model discloses a comprehensive railway signal cable, which has stable conductivity and shielding property, reliable impact resistance, corrosion resistance, wear resistance and heat insulation property, and is suitable for relatively severe environments of railway laying. The cable comprises a cable core part which is formed by twisting at least four single wires, each single wire comprises a metal inner core and an outer sheath layer, and the metal inner core is made of niobium arsenide materials; the protective layers are arranged on the periphery; the cable core part is located in a central cavity formed by combining the plurality of protective layers, and the plurality of protective layers are a PET belt wrapping layer, a metal shielding layer, an inner protective layer, an isolating layer, a protective layer and a wear-resistant outer protective layer in sequence from inside to outside; the PET belt wrapping layer wraps the equivalent outer circumference of the cable core part, the periphery of the PET belt wrapping layer is wrapped with a metal shielding layer, the periphery of the metal shielding layer is wrapped with an inner protection layer, the periphery of the inner protection layer is wrapped with an isolation layer, the periphery of the isolation layer is wrapped with a protection layer, and the periphery of the isolation layer is wrapped with a wear-resistant outer protection layer.

Description

Technical Field

[0001] The utility model relates to the technical field of signal cable structures, in particular to a comprehensive railway signal cable. Background Art

[0002] Railway construction has covered most areas of the country. The road conditions in some areas are relatively poor. After the original railway signal cables are laid, power or signal interruptions may occur due to the bad conditions. Once this happens, a comprehensive investigation is required, which is time-consuming and labor-intensive, and delays railway transportation operations. Therefore, the railway signal cables of the existing technology can no longer meet the signal cable laying requirements for railway layouts in harsh environments; for this reason, it is urgent to develop a railway signal cable that can adapt to relatively harsh environments, so as to ensure the reliable and stable operation of railway transportation. Summary of the invention

[0003] In view of the above problems, the utility model provides a comprehensive railway signal cable, which has stable conductivity and shielding properties, and has reliable impact resistance, corrosion resistance, wear resistance and heat insulation, and is suitable for the relatively harsh environment of railway laying.

[0004] A comprehensive railway signal cable, characterized in that it comprises:

[0005] The cable core part is composed of at least four strands of twisted wires, each of which includes a metal inner core and an outer sheath layer, and the metal inner core is made of niobium arsenide;

[0006] And several layers of protection around the periphery;

[0007] The cable core is located in a central cavity formed by a combination of several protective layers, wherein the protective layers are, from the inside to the outside, a PET tape wrapping layer, a metal shielding layer, an inner protective layer, an isolation layer, a protective layer, and a wear-resistant outer protective layer;

[0008] The PET tape wrapping layer is wrapped around the equivalent outer circumference of the cable core part, the outer circumference of the PET tape wrapping layer is covered with the metal shielding layer, the outer circumference of the metal shielding layer is covered with the inner protective layer, the outer circumference of the inner protective layer is covered with the isolation layer, the outer circumference of the isolation layer is covered with the protective layer, and the outer circumference of the isolation layer is covered with the wear-resistant outer protective layer;

[0009] The outer sheath layer, inner sheath layer and wear-resistant outer sheath layer are all made of polyimide materials;

[0010] The metal shielding layer is made of foamed aluminum.

[0011] It is further characterized by:

[0012] The cable core portion includes five single wires, including three single wires for power transmission and two single wires for signal transmission, and the colors of the outer sheath layers of the five single wires are different from each other;

[0013] The outer periphery of the cable core part is coated with a waterproof sand layer, the outer periphery of the waterproof sand layer is coated with a PET tape wrapping layer, and the waterproof sand layer is used for waterproofing;

[0014] The material of the isolation layer is aerogel, and the cable provides good thermal insulation performance and excellent flame retardant and heat insulation properties;

[0015] The material of the protective layer is a carbon fiber epoxy resin composite material, which has the characteristics of high strength, strong impact resistance, heat resistance and corrosion resistance.

[0016] After adopting the above technical scheme, the cable sheath structure outside the cable core is reasonably designed, which ensures the stability of cable signal transmission, prevents the transmission signal from distortion and deformation, and improves the safety and reliability of the cable. At the same time, it also ensures that the cable has excellent temperature resistance, moisture resistance, pressure resistance, electromagnetic interference resistance, corrosion resistance and other functions, which fully meets the requirements of high-speed railways for cables in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the longitudinal structure of the utility model;

[0018] The names corresponding to the serial numbers in the figure are as follows:

[0019] Cable core part 10, single wire 20, metal inner core 21, outer sheath layer 22, waterproof sand layer 30, PET tape wrapping layer 40, metal shielding layer 50, inner sheath 60, isolation layer 70, protective layer 80, wear-resistant outer sheath 90, PP filling rope 100. DETAILED DESCRIPTION

[0020] A comprehensive railway signal cable, see Figure 1 It includes: a cable core part 10 and several layers of protective layers on the periphery, wherein the cable core part 10 is composed of at least four single wires 20 twisted together, each single wire 20 includes a metal inner core 21 and an outer sheath layer 22, and the metal inner core 21 is made of niobium arsenide.

[0021] Specific embodiments, see Figure 1 : The cable core part 10 includes five single wires 20, including three single wires 20 for power transmission and two single wires 20 for signal transmission, and the colors of the outer sheath layers 22 of the five single wires 20 are different from each other; a PP filling rope 100 is arranged in the center of the five single wires 20 after being twisted to ensure stability and reliability;

[0022] The cable core part 10 is located in a central cavity formed by a combination of several protective layers, wherein the protective layers are, from inside to outside, a PET tape wrapping layer 40, a metal shielding layer 50, an inner protective layer 60, an isolation layer 70, a protective layer 80, and a wear-resistant outer protective layer 90;

[0023] The outer periphery of the cable core part 10 is coated with a waterproof sand layer 30, and the outer periphery of the waterproof sand layer 30 is coated with a PET tape wrapping layer 40, and the waterproof sand layer 30 is used for waterproofing;

[0024] The PET tape wrapping layer 40 is wrapped around the outer circumference of the waterproof sand layer 30, the outer circumference of the PET tape wrapping layer 40 is covered with a metal shielding layer 50, the outer circumference of the metal shielding layer 50 is covered with an inner protective layer 60, the outer circumference of the inner protective layer 60 is covered with an isolation layer 70, the outer circumference of the isolation layer 70 is covered with a protective layer 80, and the outer circumference of the isolation layer 80 is covered with a wear-resistant outer protective layer 90;

[0025] The outer sheath layer 22, the inner sheath layer 60, and the wear-resistant outer sheath layer 90 are all made of polyimide materials;

[0026] The metal shielding layer 50 is made of foamed aluminum.

[0027] The material of the isolation layer 70 is aerogel, which provides the cable with good thermal insulation performance and excellent flame retardancy and thermal insulation;

[0028] The material of the protective layer 80 is a carbon fiber epoxy resin composite material, which has the characteristics of high strength, strong impact resistance, heat resistance and corrosion resistance.

[0029] Among them, the metal shielding layer 50 adopts foam aluminum, which has a series of advantages such as high impact absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, high electromagnetic shielding and low thermal conductivity. During the use of the cable, it is not affected by other external factors, thereby ensuring the stability of signal transmission, and the transmitted signal is not distorted or deformed, thereby improving the safety and reliability of the cable.

[0030] The manufacturing process of this comprehensive railway signal cable is: first, niobium arsenide is used as the metal inner core and polyimide as the outer sheath layer. According to the needs, 5 insulated single wires of the production number are twisted into a wire group, and then a waterproof sand layer is wrapped on the outer surface of the twisted wire group; according to the needs, the cable core is sequentially coated with a PET tape wrapping layer 40, a metal shielding layer 50, an inner sheath 60, an isolation layer 70, a protective layer 80, and a wear-resistant outer sheath 90. In order to ensure that the electrical performance indicators of the cable are qualified, during the production process, all wire groups in the cable core must maintain consistent tension, and the twisting pitch of the insulated single wires and wire groups is set in the range of 35 to 55 times the outer diameter of the cable core.

[0031] The cable sheath structure outside the cable core is reasonably designed to ensure the stability of cable signal transmission, so that the transmitted signal is not distorted or deformed, thereby improving the safety and reliability of the cable. At the same time, it also ensures that the cable has excellent heat resistance, moisture resistance, pressure resistance, electromagnetic interference resistance, corrosion resistance and other functions, fully meeting the requirements of high-speed railways for cables in harsh environments.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A comprehensive railway signal cable, characterized in that: It includes: The cable core part is composed of at least four single wires twisted together, each single wire includes a metal inner core and an outer sheath layer, and the metal inner core is made of niobium arsenide; And several layers of protection around the periphery; The cable core is located in a central cavity formed by a combination of several protective layers, wherein the protective layers are, from the inside to the outside, a PET tape wrapping layer, a metal shielding layer, an inner protective layer, an isolation layer, a protective layer, and a wear-resistant outer protective layer; The PET tape wrapping layer is wrapped around the equivalent outer circumference of the cable core part, the outer circumference of the PET tape wrapping layer is covered with the metal shielding layer, the outer circumference of the metal shielding layer is covered with the inner protective layer, the outer circumference of the inner protective layer is covered with the isolation layer, the outer circumference of the isolation layer is covered with the protective layer, and the outer circumference of the isolation layer is covered with the wear-resistant outer protective layer; The outer sheath layer, inner sheath layer and wear-resistant outer sheath layer are all made of polyimide materials; The metal shielding layer is made of foamed aluminum.

2. The integrated railway signal cable according to claim 1, characterized in that: The cable core portion includes five single wires, including three single wires for power transmission and two single wires for signal transmission, and the colors of outer sheath layers of the five single wires are different from each other.

3. The integrated railway signal cable according to claim 1, characterized in that: The outer periphery of the cable core part is coated with a waterproof sand layer, the outer periphery of the waterproof sand layer is coated with a PET tape wrapping layer, and the waterproof sand layer is used for waterproofing operations.

4. The integrated railway signal cable according to claim 1, characterized in that: The material of the isolation layer is aerogel.

5. The integrated railway signal cable according to claim 1, characterized in that: The material of the protective layer is a carbon fiber epoxy resin composite material.

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