Corrosion-resistant high-temperature-resistant railway signal cable

Abstract

The application provides an anti-corrosion and high-temperature-resistant railway signal cable, which comprises a plurality of cable core assemblies and a sheath assembly, any one of the plurality of cable core assemblies comprises a plurality of cable cores, the cable core comprises a conductor, an anti-corrosion layer and an insulation layer arranged in sequence from inside to outside, and the sheath assembly is arranged on the outer periphery of the plurality of cable core assemblies and comprises a wrapping layer, a heat insulation layer and an outer sheath structure arranged in sequence from inside to outside. In this way, the anti-corrosion layer arranged between the conductor and the insulation layer of the cable core improves the anti-corrosion capability of the cable. Meanwhile, the heat insulation layer arranged between the wrapping layer and the outer sheath structure of the sheath assembly can play a good thermal isolation role between the plurality of cable core assemblies wrapped by the wrapping layer and the external environment, so that the aging or failure of part of structures of the cable core assembly caused by long-term high-temperature work of the cable is avoided, the service life of the cable is improved, and the stability of signal transmission of the cable is ensured.

Description

Technical Field

[0001] This application relates to the field of cable technology, and in particular to a corrosion-resistant and high-temperature-resistant railway signal cable. Background Technology

[0002] As a crucial component of the railway transportation system, the performance of railway signal cables directly impacts the safety and stability of railway traffic. Existing railway signal cables are used outdoors for extended periods, resulting in prolonged exposure to high temperatures or corrosive environments. This makes them prone to performance degradation and insulation failure, posing safety hazards to railway traffic. Utility Model Content

[0003] This application provides a corrosion-resistant and high-temperature-resistant railway signal cable to solve the problem that railway signal cables in the known art are prone to performance degradation and insulation failure when used outdoors for a long time.

[0004] This application provides a corrosion-resistant and high-temperature resistant railway signal cable, comprising multiple cable core assemblies and a sheath assembly. Each of the multiple cable core assemblies includes multiple cable cores, each cable core including a conductor, an anti-corrosion layer, and an insulation layer arranged sequentially from the inside to the outside. The sheath assembly is wrapped around the outer periphery of the multiple cable core assemblies, and the sheath assembly includes a wrapping layer, a heat insulation layer, and an outer sheath structure arranged sequentially from the inside to the outside.

[0005] In one possible implementation, the anti-corrosion layer is an epoxy resin layer.

[0006] In one possible implementation, the thickness of the epoxy resin layer is 0.1 to 0.13 mm.

[0007] In one possible implementation, the insulation layer is an aerogel sheath layer.

[0008] In one possible implementation, the sheath assembly further includes a shielding layer disposed between the wrapping layer and the insulation layer.

[0009] In one possible implementation, the shielding layer comprises a plurality of metal wires, which are formed by a braiding process.

[0010] In one possible implementation, the diameter of the metal wire is 0.155–0.162 mm; and / or The braiding density of the shielding layer is greater than or equal to 85%.

[0011] In one possible implementation, the outer sheath structure includes a metal layer, an inner sheath, an armor layer, and an outer sheath arranged sequentially from the inside out.

[0012] In one possible implementation, the number of wrapping layers is set to at least two, and the thickness of the wrapping layers is 0.05 to 0.07 mm.

[0013] In one possible implementation, the corrosion-resistant and high-temperature-resistant railway signal cable further includes a filler that fills between the plurality of cable core assemblies and between the cable core assemblies and the wrapping layer.

[0014] The corrosion-resistant and high-temperature-resistant railway signal cable of this application improves the cable's corrosion resistance by providing an anti-corrosion layer between the conductor and insulation layer of the cable core. Simultaneously, by incorporating a heat insulation layer between the sheathing assembly and the outer sheath structure, this application effectively isolates the multiple cable core assemblies encased in the sheathing layer from the external environment. This prevents the cable from aging or failing due to prolonged exposure to high temperatures, thus extending the cable's service life and ensuring the stability of signal transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the corrosion-resistant and high-temperature resistant railway signal cable of this application in one embodiment.

[0016] Explanation of main component symbols: 100, Corrosion-resistant and high-temperature resistant railway signal cable; 10, Cable core assembly; 11, Cable core; 111, Conductor; 112, Corrosion-resistant layer; 113, Insulation layer; 20, Filler; 30, Wrapping layer; 40, Shielding layer; 50, Heat insulation layer; 60, Outer sheath structure; 61, Metal layer; 62, Inner sheath; 63, Armor layer; 64, Outer sheath; 70, Sheath assembly.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0018] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0019] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof.

[0020] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant art and in the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

[0021] As a crucial component of the railway transportation system, the performance of railway signal cables directly impacts the safety and stability of railway traffic. Existing railway signal cables are used outdoors for extended periods, resulting in prolonged exposure to high temperatures or corrosive environments. This makes them prone to performance degradation and insulation failure, posing safety hazards to railway traffic.

[0022] Based on this, this application provides a corrosion-resistant and high-temperature-resistant railway signal cable. By setting an anti-corrosion layer between the conductor and the insulation layer of the cable core, the conductor can be protected against corrosion, thereby improving the cable's corrosion resistance. Simultaneously, by setting a heat insulation layer between the sheathing layer and the outer sheath structure of the sheath assembly, this application provides excellent thermal isolation between the multiple cable core assemblies encased in the sheathing layer and the external environment. This prevents the cable from being exposed to high temperatures for extended periods, which could lead to aging or failure of some structures in the cable core assemblies, thus extending the cable's service life and ensuring the stability of the cable's signal transmission.

[0023] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, this embodiment provides a corrosion-resistant and high-temperature-resistant railway signal cable 100, including multiple cable core assemblies 10 and a sheath assembly 70. The cable core assemblies 10 are used to realize functions such as signal transmission. By setting multiple cable core assemblies 10 within the sheath assembly 70, different signal transmissions can be realized, so that the corrosion-resistant and high-temperature-resistant railway signal cable 100 of this application can simultaneously perform multiple different signal transmissions.

[0025] Any one of the multiple cable core assemblies 10 includes multiple cable cores 11. Each cable core 11 includes a conductor 111, an anti-corrosion layer 112, and an insulation layer 113 arranged sequentially from the inside out. A sheath assembly 70 is disposed around the multiple cable core assemblies 10 to protect them. The sheath assembly 70 includes a wrapping layer 30, a heat insulation layer 50, and an outer sheath structure 60 arranged sequentially from the inside out.

[0026] Thus, by providing an anti-corrosion layer 112 between the conductor 111 and the insulation layer 113 of the cable core 11, this application can provide anti-corrosion protection for the conductor 111, thereby improving the cable's corrosion resistance. Simultaneously, by providing a heat insulation layer 50 between the wrapping layer 30 and the outer sheath structure 60 of the sheath assembly 70, this application can provide excellent thermal isolation between the multiple cable core assemblies 10 encased in the wrapping layer 30 and the external environment. This prevents the cable from being exposed to high temperatures for extended periods, which could lead to aging or failure of some structures of the cable core assemblies 10, thus improving the cable's service life and ensuring the stability of cable signal transmission.

[0027] Please combine Figure 1 In one embodiment, the number of cable core assemblies 10 is set to four, and the four cable core assemblies 10 are distributed in a rectangular shape within the sheath assembly 70. Furthermore, each of the four cable core assemblies 10 has four cable cores 11, and the four cable cores 11 are distributed in a rectangular shape within the inner sheath. The individual cable cores 11 in the same cable core assembly 10 can be compositely formed by twisting or star twisting.

[0028] It is understood that in other embodiments, the number of cable core assemblies 10 can be three or five, or other numbers, and the number of cable cores 11 within any cable core assembly 10 can also be three or five, or other numbers. Furthermore, the number of cable cores 11 within different cable core assemblies 10 can be the same or different.

[0029] In this embodiment, conductor 111 is made of a conductive metal such as copper. For example, conductor 111 is formed by drawing and annealing a copper rod. The anti-corrosion layer 112 is an epoxy resin layer, which can be uniformly coated on the outer circumferential surface of conductor 111, with a thickness of 0.1–0.13 mm. Epoxy resin has outstanding anti-corrosion properties, especially in preventing corrosion from moisture, salt water, and some chemical substances. Coating the outer circumferential surface of conductor 111 with epoxy resin can provide radial corrosion resistance, ensuring that the cable can transmit signals stably even under long-term corrosive environments.

[0030] In this embodiment, the insulation layer 113 is made of polytetrafluoroethylene (PTFE) and is formed on the outer periphery of the insulation layer 113 by insulating extrusion. The thickness of the insulation layer 113 is 0.5–0.7 mm. PTFE has high temperature resistance and corrosion resistance. By covering the outer periphery of the corrosion-resistant layer 112 with PTFE as the outermost structure of the entire cable core 11, the corrosion resistance and high temperature resistance of the entire cable core 11 can be improved.

[0031] Specifically, during extrusion molding, the insulating layer 113 can be formed by adding different colored pigments to the polytetrafluoroethylene material to create an insulating layer 113 of a corresponding color. In this way, different colored insulating layers 113 are provided on the outer peripheral surfaces of different conductors 111, so that different conductors 111 can be distinguished by the color of the insulating layer 113.

[0032] Please combine Figure 1 In one embodiment, the corrosion-resistant and high-temperature resistant railway signal cable 100 further includes a filling member 20, which fills between a plurality of cable core assemblies 10 and between the cable core assembly 10 and the wrapping layer 30.

[0033] In this embodiment, the filling element 20 is a glass fiber filament. The glass fiber filament is made of slender glass fibers, which have the characteristics of high strength, high temperature resistance, good electrical insulation and corrosion resistance. Filling it between multiple cable core assemblies 10 and between the cable core assembly 10 and the wrapping layer 30 can improve the high temperature resistance and corrosion resistance of the cable without affecting the signal transmission of the cable core assembly 10.

[0034] After the stranding of each cable core 11 in the same cable core assembly 10 is completed, the stranded cable core assembly 10 and the filling member 20 are then stranded together to form a cable. After the stranding of each cable core assembly 10 and the filling member 20 is completed to form a cable, a wrapping layer 30 is then wrapped around the outside of the stranded cable to ensure the roundness of its structure.

[0035] In this embodiment, the wrapping layer 30 is made of high-temperature polyimide film tape with a thickness of 0.05–0.07 mm. The wrapping layer 30 is wrapped around the cable in a wrapping manner, and the wrapping layer 30 is configured as two layers, that is, two layers of high-temperature polyimide film tape are wrapped around the cable, and the overlap rate of a single layer of high-temperature polyimide film tape is not less than 25% of the bandwidth of the high-temperature polyimide film tape.

[0036] High-temperature polyimide film tape possesses high-temperature resistance, which improves the overall high-temperature performance of the cable. Furthermore, the high-temperature polyimide film tape exhibits good chemical stability, providing excellent corrosion protection for the individual cable core components 10 covered by the high-temperature polyimide film tape, thereby enhancing the overall corrosion resistance of the cable.

[0037] Please combine Figure 1 In one embodiment, the sheath assembly 70 further includes a shielding layer 40 disposed between the wrapping layer 30 and the heat insulation layer 50. The shielding layer 40 includes a plurality of metal wires, which are formed by a braiding process.

[0038] The metal wire is made of tin-plated copper wire with a diameter of 0.155 to 0.162 mm. Multiple metal wires are braided into a shielding layer 40 using a braiding process. The braiding density of the shielding layer 40 is greater than or equal to 85%, so as to form an electromagnetic shielding function for the cable core assembly 10 and prevent electromagnetic signals outside the cable from affecting the signal transmission of the cable core assembly 10.

[0039] In this embodiment, the heat insulation layer 50 is an aerogel sheath layer, which can be extruded onto the outer periphery of the shielding layer 40 using an extrusion molding process. The aerogel sheath layer uses heat-resistant aerogel, which has low thermal conductivity and can effectively block heat transfer from the outer sheath structure 60 to the cable core assembly 10, thereby providing high-temperature protection for the cable core assembly 10. In addition, the heat-resistant aerogel has excellent high-temperature resistance and can work stably even in high-temperature environments.

[0040] Please combine Figure 1 In one embodiment, the outer sheath structure 60 includes a metal layer 61, an inner sheath 62, an armor layer 63, and an outer sheath 64 arranged sequentially from the inside to the outside.

[0041] The metal layer 61 is an aluminum sheath or a composite metal sheath, which is fitted around the outer periphery of the heat insulation layer 50. It can work with the shielding layer 40 to form a composite shielding structure, effectively protecting the cable core assembly 10 from electromagnetic interference. When the metal layer 61 is an aluminum sheath, it can specifically be an aluminum tube or an aluminum-plastic composite tape, etc.

[0042] The inner sheath 62 is made of a high-temperature resistant and corrosion-resistant material, specifically fluororubber. Fluororubber is a synthetic rubber material with excellent high-temperature resistance, chemical corrosion resistance, and excellent mechanical properties. By extruding the fluororubber material onto the outer periphery of the metal layer 61, it provides excellent protection for the metal layer 61 and the internal cable core assembly 10, thereby improving the overall corrosion resistance and high-temperature resistance of the cable. The thickness of the inner sheath 62 is 1.2–1.5 mm.

[0043] In this embodiment, the armor layer 63 adopts a galvanized double steel strip armor structure, which can increase the cable's resistance to external forces and provide good protection for each layer within the armor layer 63.

[0044] In this embodiment, the outer sheath 64 is made of reinforced polyethylene, which has good corrosion resistance and heat resistance, and can maintain relatively stable performance in high temperature and corrosive environments, thereby improving the overall corrosion resistance and high temperature resistance of the cable.

[0045] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A corrosion-resistant and high-temperature-resistant railway signal cable, comprising: Multiple cable core assemblies, wherein any one of the multiple cable core assemblies includes multiple cable cores, characterized in that each cable core includes a conductor, an anti-corrosion layer, and an insulation layer arranged sequentially from the inside to the outside; The corrosion-resistant and high-temperature resistant railway signal cable also includes a sheath assembly, which is wrapped around the periphery of the plurality of cable core assemblies. The sheath assembly includes a wrapping layer, a heat insulation layer, and an outer sheath structure arranged sequentially from the inside to the outside.

2. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 1, characterized in that, The anti-corrosion layer is an epoxy resin layer.

3. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 2, characterized in that, The thickness of the epoxy resin layer is 0.1 to 0.13 mm.

4. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 1, characterized in that, The heat insulation layer is an aerogel sheath layer.

5. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 1, characterized in that, The sheath assembly further includes a shielding layer disposed between the wrapping layer and the heat insulation layer.

6. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 5, characterized in that, The shielding layer comprises multiple metal wires, which are formed by a braiding process.

7. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 6, characterized in that, The diameter of the metal wire is 0.155–0.162 mm; and / or The braiding density of the shielding layer is greater than or equal to 85%.

8. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 1, characterized in that, The outer sheath structure includes, from the inside out, a metal layer, an inner sheath, an armor layer, and an outer sheath.

9. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 1, characterized in that, The number of wrapping layers is set to at least two, and the thickness of the wrapping layer is 0.05 to 0.07 mm.

10. The corrosion-resistant and high-temperature-resistant railway signal cable as described in claim 1, characterized in that, The corrosion-resistant and high-temperature resistant railway signal cable also includes a filling component, which fills between the plurality of cable core assemblies and between the cable core assemblies and the wrapping layer.

Images