Composite protection intelligent cable for mountain rail transit

Abstract

The utility model discloses a composite protection intelligent cable for mountain rail transit, which belongs to the technical field of cables and comprises a circular copper conductor, and a conductor semi-conductive shielding layer, an insulating layer, an insulating semi-conductive shielding layer and a semi-conductive water-blocking buffer layer are sequentially arranged outside the circular copper conductor. A metal shielding layer is arranged in the semi-conductive water-blocking buffer layer, and a waterproof layer, an oxygen barrier layer, an armor layer, an alkali-free glass fiber tape wrapping layer, an outer sheath layer and a composite sheath layer are sequentially arranged outside the semi-conductive water-blocking buffer layer; and a temperature measuring and communication optical cable is arranged in the metal shielding layer. The 35kV flame-retardant B1-level composite protection intelligent cable for mountain rail transit has wear-resistant, rat-proof, termite-proof and ultraviolet-proof additional performance, a temperature-sensing detection optical cable is arranged on a metal shielding layer, the whole line is effectively monitored, management of a master console is matched, when the temperature exceeds the set temperature, automatic alarm, power-off protection and line switching are achieved, and the service life of the cable is prolonged. Fire situations such as electrical short circuit are avoided, and safe and reliable operation of rail transit lines is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and in particular relates to a composite protective intelligent cable for mountain rail transit. Background Art

[0002] With the rapid development of urbanization and the national economy, urban rail transit has also entered a period of rapid growth. However, currently available 35kV single-core power cables lack online temperature monitoring capabilities. While meeting the electrical and mechanical performance requirements of 35kV medium-voltage cables, they also lack the ability to achieve low heat release, B1-level flame retardancy, waterproofing, rodent and ant resistance, UV protection, and wear resistance. Therefore, it is crucial to develop a 35kV flame-retardant, B1-level composite protective intelligent cable suitable for mountain rail transit.

[0003] Chinese utility model patent number CN217767940U discloses a low-smoke, halogen-free, Class B1 flame-retardant power cable for subway use with a rated voltage of 35kV. Its structure comprises, from the inside out, an inner shield layer, an insulation layer, an outer shield layer, a first wrapping layer, a metal shield layer, a second wrapping layer, a waterproof layer, an inner liner layer, an armor layer, a third wrapping layer, and an outer sheath. The conductor is a Class 2 compressed round copper conductor. The first wrapping layer is a layer of semi-conductive nylon tape; the metal shield layer is a layer of sparsely wound copper wire with reversely tied copper tape on the surface; the second wrapping layer is a layer of low-smoke, halogen-free, flame-retardant tape; the waterproof layer is a longitudinally wrapped layer of aluminum-plastic composite tape; the inner liner layer is an extruded layer of low-smoke, halogen-free, oxygen-insulating sheathing material; the armor layer is a wrapped brass tape; the third wrapping layer is an alkali-free glass fiber tape; and the outer sheath is an extruded low-smoke, halogen-free, flame-retardant polyolefin sheathing material. This cable meets Class B1 requirements. However, no optical fiber is added to the conductor, and it does not have communication and temperature measurement functions. The outer sheath is not covered with a nylon sheath, and the cable is prone to bending, dragging, and winding during use, which can easily cause the outer sheath to crack. The Chinese utility model with patent number CN105336440A discloses an optical fiber composite medium-voltage cable, which is characterized by: the cable is composed of an outer sheath and an inner core, the inner core is composed of three cable cores and an optical cable unit, and the outer sheath is composed of a tape layer, an isolation sleeve, an armor layer and an outer sheath layer; an FRP optical cable reinforcement core is provided at the center of the optical cable unit, and a group of optical fiber loose tubes are wrapped around the FRP optical cable reinforcement core, and the outside of the optical fiber loose tube is wrapped with a water-blocking tape and an anti-electric tracking sheath; the cable core is composed of a conductor and a metal shielding layer wrapped around the conductor, and a conductor shielding layer, an insulating layer and an insulating shielding layer are wrapped between the conductor and the metal shielding layer. The product has both information communication and power transmission functions. Without increasing the cost of cable laying, the upper end connection of power fiber to the home and the functions of power line monitoring and early warning can be realized simultaneously, thereby improving the fault response speed and reducing the maintenance cost of the line. It overcomes some of the shortcomings of the prior art such as multiple cables and multiple networks, repeated wiring, and high costs, but the cable outer sheath does not adopt halogen-free low-smoke flame retardant material and does not have flame retardant function. The cable sheath is a single-layer structure and does not adopt flame retardant + nylon composite sheath. It does not have the properties of anti-rat and ant, wear resistance, etc. Long-term use in the field of mountain rail transit will affect the service life of the cable. The Chinese utility model with patent number CN217361212U discloses an environmentally friendly fire-resistant and flame-retardant medium-voltage cable, including a wire core, a conductor is provided inside the wire core, a fire-resistant mica tape is fixedly connected to the outer surface of the wire core, an insulating material layer is fixedly connected to the outer surface of the fire-resistant mica tape, a heat-resistant material layer is provided on the outer surface of the insulating material layer, and a cable core layer is fixedly connected to the outer surface of the heat-resistant material layer.The utility model has the following advantages and effects: the insulating material layer has a strong insulating effect, the heat-resistant material layer makes the wire core more resistant to high temperatures, and the metal sheath can block the water when the fire water encounters the cable. The water-blocking yarn layer and the water-blocking powder contain a material that can swell when exposed to water. When water enters from the cable end or from a defect in the sheath, it will rapidly swell when exposed to water to prevent the water from further diffusing along the longitudinal direction of the cable, thereby preventing damage to the internal conductor and making the cable more waterproof. However, the cable structure does not contain an optical unit and does not have communication and temperature measurement functions. The cable sheath is a halogen-free, low-smoke, flame-retardant single-layer sheath that does not have the properties of being rat-proof, ant-proof, wear-resistant, etc. Long-term use in the field of mountain rail transit will affect the service life of the cable. Chinese utility model patent number CN115064313A discloses a flame-retardant medium-voltage cable for rail transit, belonging to the field of cable technology. This flame-retardant medium-voltage cable for rail transit utilizes a twisting band that contracts in high-temperature environments, causing the cable to twist and tumble as the band contracts. This causes combustible materials adhering to the cable surface to fall off, reducing the chance of dripping combustible materials from the cable continuing to burn, effectively improving the cable's safety. Furthermore, the twisting band effectively breaks up clumped sodium bicarbonate powder during the twisting and tumbling process, further increasing the efficiency of the sodium bicarbonate powder in generating carbon dioxide gas. The hexagonal expansion tube expands at high temperatures to form a porous carbonized layer, which absorbs large amounts of carbon dioxide gas. During this expansion process, the flame-retardant balls tear at high temperatures, releasing a flame-retardant liquid, further enhancing cable protection and effectively improving cable safety. However, the cable structure does not contain an optical unit and lacks communication or temperature measurement functions. The cable's outer sheath lacks a flame-retardant + nylon composite sheath and lacks rat and ant resistance or wear resistance.

[0004] Existing protective cables lack the ability to simultaneously provide communication and temperature measurement functions. The cable outer sheath material does not fully address the comprehensive performance requirements of flame retardancy, rodent and ant resistance, and wear resistance. Long-term use in mountain rail transit, in particular, can affect the cable's service life. Furthermore, the combination of halogen-free, low-smoke flame retardant materials and nylon sheathing has not been effectively combined to enhance the cable's overall protective performance. There is an urgent need to find a new protective intelligent cable that can meet the long-term use requirements of mountain rail transit. Utility Model Content

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present utility model is to provide a composite protective intelligent cable for mountain rail transit, so as to solve the technical problems that the existing composite protective intelligent cable for mountain rail transit cannot simultaneously have communication transmission function and temperature monitoring and sensing function, and the cable outer sheath material does not fully consider the comprehensive performance requirements such as flame retardancy, wear resistance, rat and ant resistance and UV protection.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The utility model discloses a composite protective intelligent cable for mountain rail transit, comprising: a circular copper conductor, on the outside of which are sequentially arranged a conductor semi-conductive shielding layer, an insulating layer, an insulating semi-conductive shielding layer and a semi-conductive resistive water buffer layer; a metal shielding layer is arranged inside the semi-conductive resistive water buffer layer, and on the outside of the semi-conductive resistive water buffer layer are sequentially arranged a waterproof layer, an oxygen isolation layer, an armor layer, an alkali-free glass fiber tape wrapping layer, an outer sheath layer and a composite sheath layer; and a temperature measuring and communication optical cable are arranged inside the metal shielding layer.

[0008] Preferably, the temperature measurement and communication optical cable includes a first single-mode optical fiber, a second single-mode optical fiber, a first multi-mode optical fiber and a second multi-mode optical fiber, which are respectively wound simultaneously with the copper wire.

[0009] Preferably, the conductor semiconductive shielding layer, the insulating layer and the insulating semiconductive shielding layer are co-extruded; the insulating layer is a peroxide cross-linked polyethylene insulation material; the thickness of the conductor semiconductive shielding layer is 0.8 to 1.2 mm; the thickness of the insulating layer is 10.0 to 10.5 mm; and the thickness of the insulating semiconductive shielding layer is 0.8 to 1.2 mm.

[0010] Preferably, the semiconducting resistive water buffer layer includes a first semiconducting resistive water layer and a second semiconducting resistive water layer from the inside out; and the metal shielding layer is arranged between the first semiconducting resistive water layer and the second semiconducting resistive water layer.

[0011] Preferably, the metal shielding layer is formed by sparsely wound copper wires; the diameter of the copper wires is 0.85 to 0.88 mm, and the number of the copper wires is 30 to 40.

[0012] Preferably, the waterproof layer is formed by longitudinally wrapping a non-ribbed aluminum-plastic composite tape; the thickness of the waterproof layer is 0.2 to 0.3 mm.

[0013] Preferably, the oxygen-isolating layer is formed by extruding a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame retardancy and excellent shelling properties; the thickness of the oxygen-isolating layer is 2.0 to 2.4 mm.

[0014] Preferably, the armor layer is a non-magnetic metal tape armor layer; the thickness of the armor layer is 0.12-0.13 mm.

[0015] Preferably, the armor layer is formed by overlapping and wrapping 0.12mm×50mm brass strips.

[0016] Preferably, the outer sheath layer is a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame retardancy and excellent crusting properties; the thickness of the outer sheath layer is 3.0-3.4 mm; the composite sheath layer is a nylon sheath material with high flame retardancy and excellent crusting properties; the thickness of the composite sheath layer is 0.7-0.85 mm.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model provides a composite protective intelligent cable for mountain rail transit, comprising: a circular copper conductor, the copper conductor has good electrical conductivity and mechanical strength, and can ensure the stable transmission of electric energy; a conductor semi-conductive shielding layer, an insulating layer, an insulating semi-conductive shielding layer and a semi-conductive water-resistance buffer layer are sequentially arranged outside the circular copper conductor; the conductor semi-conductive shielding layer can uniformly form the electric field on the surface of the conductor, reduce the possibility of local discharge, and improve the safety performance of the cable; the insulating layer provides electrical insulation, prevents current leakage, and ensures the stable operation of the cable under high-voltage environments; the insulating semi-conductive shielding layer and the conductor semi-conductive shielding layer work together to further uniformize the electric field and improve the insulation performance and stability of the cable; the semi-conductive water-resistance buffer layer has a water-blocking function, which prevents moisture from penetrating into the interior of the cable, and at the same time acts as a buffer layer to protect the internal structure from the influence of mechanical stress; a metal shielding layer is arranged inside the semiconductor water-resistance buffer layer, and the metal shielding layer provides additional mechanical protection and electromagnetic shielding, reduces the influence of external electromagnetic interference on the internal signal of the cable, and enhances the anti-interference ability of the cable. force; the outer surface of the semi-conductive water-resistant buffer layer is sequentially provided with a waterproof layer, an oxygen barrier layer, an armor layer, an alkali-free glass fiber tape wrapping layer, an outer sheath layer and a composite sheath layer; the waterproof layer further enhances the waterproof performance of the cable, ensuring stable operation of the cable in humid environments; the oxygen barrier layer prevents oxygen from entering the cable interior, delaying the aging process of the insulation material and extending the service life of the cable; the armor layer provides strong mechanical protection, preventing the cable from being damaged by external forces during laying and operation, and enhancing the durability of the cable; the alkali-free glass fiber tape wrapping layer serves as an additional insulation and protective layer, improving the cable's high temperature resistance and fire resistance, ensuring stable operation of the cable in high temperature environments; the outer sheath layer and the composite sheath layer, as the outermost layers of the cable, provide ultimate physical protection against external environmental influences such as ultraviolet rays, chemicals and mechanical wear, ensuring the long-term stable operation of the cable in various harsh environments; the metal shielding layer is equipped with temperature measurement and communication optical cables to realize real-time monitoring of the cable's operating temperature and data transmission, facilitating intelligent management and maintenance of the cable. This utility model not only meets the additional performance requirements of 35kV flame-retardant B1-level composite protective intelligent cables for mountain rail transit, such as wear resistance, rodent and ant resistance, and UV protection, but also installs a temperature-sensing optical cable in the metal shielding layer, which can effectively monitor the entire line. In conjunction with the main console management, it can automatically alarm when the temperature exceeds the set temperature, provide power-off protection, and implement line switching functions to avoid fires such as electrical short circuits, ensuring the safe and reliable operation of rail transit lines. This solves the technical problems that existing composite protective intelligent cables for mountain rail transit cannot simultaneously possess communication transmission functions and temperature monitoring and sensing functions, and that the cable outer sheath material does not fully take into account the comprehensive performance requirements such as flame retardancy, wear resistance, rodent and ant resistance, and UV protection.

[0019] Furthermore, the temperature measurement and communication optical cable includes a first single-mode optical fiber, a second single-mode optical fiber, a first multimode optical fiber, and a second multimode optical fiber, each of which is co-winded with the copper wire. This diverse fiber type enhances the flexibility and reliability of both communication and temperature measurement functions. Single-mode optical fiber is suitable for long-distance, high-speed communications, while multimode optical fiber is suitable for short-distance, high-bandwidth communications. Co-winding with the copper wire not only enhances the mechanical strength of the optical cable but also improves its stability and durability within the cable structure.

[0020] Furthermore, the conductor semi-conductive shield, insulation layer, and insulating semi-conductive shield are co-extruded into three layers. This three-layer co-extrusion technology simplifies the production process, improves production efficiency, and ensures a tight bond between the layers, thereby enhancing the overall performance of the cable. The insulation layer is made of peroxide cross-linked polyethylene insulation material. Peroxide cross-linked polyethylene insulation material has excellent electrical insulation properties, heat resistance, and mechanical strength, effectively preventing current leakage and ensuring stable operation of the cable in high-voltage environments.

[0021] Furthermore, the semiconducting water buffer layer comprises, from the inside out, a first semiconducting water layer and a second semiconducting water layer; the metal shielding layer is positioned between the first and second semiconducting water layers. This dual semiconducting water layer design provides enhanced water resistance, effectively preventing moisture from penetrating the cable and protecting the cable's internal structure from moisture erosion. The metal shielding layer, positioned between the two semiconducting water layers, is effectively protected and fully utilizes its electromagnetic shielding properties, minimizing the impact of external electromagnetic interference on the cable's internal signals.

[0022] Furthermore, the metal shielding layer is constructed from sparsely wound copper wires. This sparsely wound copper wire structure offers excellent conductivity and mechanical strength, effectively resisting external electromagnetic interference and protecting the stable transmission of signals within the cable. Furthermore, the sparsely wound copper wire structure enhances the metal shielding layer's flexibility and durability.

[0023] Furthermore, the waterproof layer is formed by longitudinally wrapping a non-ribbed aluminum-plastic composite tape. This layer offers excellent waterproofing and mechanical strength, effectively preventing moisture from penetrating the cable. Its smooth surface also helps reduce external damage to the cable during installation and operation.

[0024] Furthermore, the oxygen barrier is extruded from a halogen-free, low-smoke, flame-retardant polyolefin sheathing material with excellent flame retardancy and shell formation. This oxygen barrier effectively prevents oxygen from entering the cable, slowing the aging of the insulation material and extending the cable's service life. Its excellent flame retardancy also provides additional safety in the event of a fire.

[0025] Furthermore, the armor layer is a non-magnetic metal tape armor layer. This non-magnetic metal tape armor layer provides strong mechanical protection, preventing the cable from being damaged by external forces during installation and operation. Compared with magnetic metals, non-magnetic metals avoid magnetic interference, making the cable more suitable for applications with strict electromagnetic environment requirements.

[0026] Furthermore, the armor layer is constructed from overlapping 0.12mm x 50mm brass tape. This overlapping brass tape structure offers excellent mechanical strength and corrosion resistance, providing long-term, effective protection for the cable. Furthermore, the overlapping brass tape structure enhances the armor layer's overall stability and resistance to external impacts.

[0027] Furthermore, the outer sheath layer is made of a halogen-free, low-smoke, flame-retardant polyolefin sheath material with excellent flame retardancy and crusting properties. This outer sheath material, which has excellent flame retardancy and environmental performance, can slow the spread of fire and reduce the release of toxic smoke in the event of a fire. The composite sheath layer is made of a nylon sheath material with excellent flame retardancy and crusting properties. The use of nylon sheath material as a composite sheath layer further enhances the durability and abrasion resistance of the cable, extending its service life. At the same time, the combination of the two materials also provides better physical protection against external environmental influences such as ultraviolet rays, chemicals, and mechanical wear. The outer sheath of the cable is composed of a halogen-free, low-smoke, flame-retardant polyolefin sheath with excellent flame retardancy and crusting properties and a strong nylon sheath material. The combustion classification meets the B1 requirement, giving the cable additional properties such as wear resistance, rodent and ant resistance, and UV resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a composite protective intelligent cable for mountain rail transit disclosed in the utility model.

[0029] Among them: 1-circular copper conductor; 2-conductor semi-conductive shielding layer; 3-insulating layer; 4-insulating semi-conductive shielding layer; 5-first semi-conductive water-resistant layer; 6-second semi-conductive water-resistant layer; 7-first single-mode optical fiber; 8-second single-mode optical fiber; 9-first multi-mode optical fiber; 10-second multi-mode optical fiber; 11-metal shielding layer; 12-waterproof layer; 13-oxygen isolation layer; 14-armor layer; 15-alkali-free glass fiber tape wrapping layer; 16-outer sheath layer; 17-composite sheath layer. DETAILED DESCRIPTION

[0030] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] The present invention is described in further detail below with reference to the accompanying drawings:

[0033] The purpose of the utility model is to provide a composite protective intelligent cable for mountain rail transit, comprising a circular copper conductor 1, a conductor semi-conductive shielding layer 2, an insulating layer 3, an insulating semi-conductive shielding layer 4, a first semi-conductive water-resistant layer 5, a second semi-conductive water-resistant layer 6, a first single-mode optical fiber 7, a second single-mode optical fiber 8, a first multi-mode optical fiber 9, a second multi-mode optical fiber 10, a metal shielding layer 11, a waterproof layer 12, an oxygen barrier layer 13, an armor layer 14, an alkali-free glass fiber tape wrapping layer 15, an outer sheath layer 16, and a composite sheath layer 17. Under the premise of the above structure being realized, the cable meets the communication transmission function and the temperature monitoring and sensing function, and at the same time meets the combustion classification requirement of Class B1. The cable also has the properties of being wear-resistant, rat-resistant, ant-resistant, and UV-resistant.

[0034] In a preferred embodiment, the insulating layer 3 is a peroxide cross-linked polyethylene insulating material.

[0035] In a preferred solution, communication and temperature detection optical cables are provided in the metal shielding layer 11 .

[0036] In the preferred solution, the metal shielding layer 11 is formed by sparsely winding copper wires, and the communication and temperature detection optical cable includes a first single-mode optical fiber 7, a second single-mode optical fiber 8, a first multi-mode optical fiber 9, and a second multi-mode optical fiber 10, which are sparsely wound with the copper wires respectively.

[0037] In a preferred embodiment, the waterproof layer 12 is formed by longitudinally wrapping a non-ribbed aluminum-plastic composite tape.

[0038] In a preferred solution, the oxygen barrier layer 13 is formed by extruding a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame retardancy and excellent shelling properties.

[0039] In a preferred embodiment, the armor layer 14 is a non-magnetic metal tape armor layer.

[0040] In a preferred embodiment, the armor layer 14 is formed by overlapping and wrapping 0.12 mm×50 mm brass strips.

[0041] In a preferred embodiment, the outer sheath layer 16 is made of a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame retardancy and excellent shelling properties.

[0042] In a preferred embodiment, the composite sheath layer 17 is made of a nylon sheath material with high flame retardancy and excellent shelling properties.

[0043] See also Figure 1 This is a schematic diagram of the structure of the composite protective intelligent cable for mountain rail transit disclosed by the present utility model; as can be seen from the figure, the composite protective intelligent cable for mountain rail transit disclosed by the present utility model meets the 35kV flame retardant B1 level, including a Class 2 single-filament round copper conductor 1, and a conductor semi-conductive shielding layer 2, an insulating layer 3 and an insulating semi-conductive shielding layer 4 are sequentially arranged on the outside of the round copper conductor 1 from the inside out. The conductor semi-conductive shielding layer 2, the insulating layer 3 and the insulating semi-conductive shielding layer 4 are co-extruded, and a semi-conductive water-repellent buffer layer is provided on the outside, including a first semi-conductive water-repellent layer 5 and a second semi-conductive water-repellent layer 6. A water-blocking layer 6 is provided, and a metal shielding layer 11 is provided in the semiconductor water-blocking buffer layer. A first single-mode optical fiber 7, a second single-mode optical fiber 8, a first multi-mode optical fiber 9, and a second multi-mode optical fiber 10 of an optical cable for temperature measurement and communication are provided in the metal shielding layer 11. A waterproof layer 12 is provided outside the metal shielding layer 11, an oxygen barrier layer 13 is provided outside the waterproof layer 12, an armor layer 14 is provided outside the oxygen barrier layer 13, an alkali-free glass fiber tape wrapping layer 15 is provided outside the armor layer 14, an outer sheath layer 16 is provided outside the alkali-free glass fiber tape wrapping layer 15, and a composite sheath layer 17 is provided outside the outer sheath layer 16.

[0044] The purpose of this utility model is to solve the problem of 35kV environmentally friendly high flame retardant composite protection intelligent cable for mountain rail transit having communication transmission function and temperature monitoring and sensing function by adding optical fiber unit inside the cable metal shield; at the same time, the outer sheath of the cable is made of halogen-free low smoke flame retardant polyolefin sheath with excellent high flame retardant shelling and hardness nylon sheath material, and the combustion classification meets the B1 level requirement, and the cable has the properties of wear resistance, rat and ant resistance, and UV resistance. While ensuring that the 35kV environmentally friendly high flame retardant composite protection intelligent cable meets the electrical and mechanical performance requirements, the communication transmission and temperature monitoring and sensing functions are achieved by adding optical fiber unit, and the halogen-free low smoke flame retardant polyolefin sheath with excellent high flame retardant shelling is compounded with hardness nylon sheath material to meet the B1 level flame retardant requirement, and at the same time has the properties of wear resistance, rat and ant resistance, and UV resistance to meet the long-term use needs in the field of mountain rail transit.

[0045] Example 1

[0046] A composite protective intelligent cable for mountain rail transit, comprising:

[0047] Circular copper conductor 1, copper conductor has good electrical conductivity and mechanical strength, can ensure the stable transmission of electric energy; the circular copper conductor 1 is provided with a conductor semi-conductive shielding layer 2, an insulating layer 3, an insulating semi-conductive shielding layer 4 and a semiconductor water-repellent buffer layer in sequence; the conductor semi-conductive shielding layer 2 can uniformly distribute the electric field on the surface of the conductor, reduce the possibility of local discharge, and improve the safety performance of the cable; the insulating layer 3 provides electrical insulation, prevents current leakage, and ensures the stable operation of the cable under high-voltage environment; the insulating semi-conductive shielding layer 4 works together with the conductor semi-conductive shielding layer 2 to further uniformize the electric field and improve the insulation performance and stability of the cable; the semiconductor water-repellent buffer layer has a water-repellent function, preventing moisture from penetrating into the interior of the cable, and at the same time acts as a buffer layer to protect the internal structure from the influence of mechanical stress; a metal shielding layer 11 is provided inside the semiconductor water-repellent buffer layer, and the metal shielding layer 11 provides additional mechanical protection and electromagnetic shielding, reduces the influence of external electromagnetic interference on the internal signal of the cable, and enhances the anti-interference ability of the cable; A waterproof layer 12, an oxygen barrier layer 13, an armor layer 14, an alkali-free glass fiber tape wrapping layer 15, an outer sheath layer 16 and a composite sheath layer 17 are sequentially arranged outside the semiconductor water-repellent buffer layer; the waterproof layer 12 further enhances the waterproof performance of the cable, ensuring stable operation of the cable in humid environments; the oxygen barrier layer 13 prevents oxygen from entering the interior of the cable, delays the aging process of the insulation material, and extends the service life of the cable; the armor layer 14 provides strong mechanical protection, prevents the cable from being damaged by external forces during laying and operation, and enhances the durability of the cable; the alkali-free glass fiber tape wrapping layer 15 serves as an additional insulation and protective layer, improves the cable's high temperature resistance and fire resistance, and ensures stable operation of the cable in high temperature environments; the outer sheath layer 16 and the composite sheath layer 17 are the outermost layers of the cable, providing ultimate physical protection against external environmental influences such as ultraviolet rays, chemicals and mechanical wear, ensuring long-term stable operation of the cable in various harsh environments; temperature measurement and communication optical cables are arranged inside the metal shielding layer 11. It solves the technical problems that the existing composite protective intelligent cables for mountain rail transit cannot simultaneously have communication transmission functions and temperature monitoring and sensing functions, and that the cable outer sheath materials do not fully consider the comprehensive performance requirements such as flame retardancy, wear resistance, rat and ant resistance, and UV resistance.

[0048] Example 2

[0049] A composite protective intelligent cable for mountain rail transit, comprising:

[0050] A circular copper conductor 1 is surrounded by a semi-conductive conductor shield 2, an insulating layer 3, an insulating semi-conductive shield 4, and a semi-conductive water-repellent buffer layer. A metal shield 11 is located within the semi-conductive water-repellent buffer layer, and a waterproof layer 12, an oxygen barrier layer 13, an armor layer 14, an alkali-free glass fiber tape wrap 15, an outer sheath 16, and a composite sheath 17 are located outside the semi-conductive water-repellent buffer layer. A temperature measurement and communication optical cable is located within the metal shield 11. The temperature measurement and communication optical cable comprises a first single-mode optical fiber 7, a second single-mode optical fiber 8, a first multi-mode optical fiber 9, and a second multi-mode optical fiber 10, each of which is spooled simultaneously with the copper wire. Multi-mode optical fibers are suitable for short-distance, high-bandwidth communications. Spooling them simultaneously with the copper wire not only enhances the mechanical strength of the optical cable but also improves its stability and durability within the cable structure. The cable is co-extruded from three layers: a conductive semiconductive shielding layer 2, an insulating layer 3, and an insulating semiconductive shielding layer 4. The insulating layer 3 is made of peroxide-cross-linked polyethylene insulation. The thickness of the conductive semiconductive shielding layer 2 is 0.8 mm; the thickness of the insulating layer 3 is 10.0 mm; and the thickness of the insulating semiconductive shielding layer 4 is 0.8 mm. This three-layer co-extrusion technology simplifies the production process, improves production efficiency, and ensures a tight bond between the layers, thereby enhancing the overall performance of the cable. The semiconductive water-repellent buffer layer comprises, from the inside out, a first semiconductive water-repellent layer 5 and a second semiconductive water-repellent layer 6. A metal shielding layer 11 is positioned between the first and second semiconductive water-repellent layers 5 and 6. This dual semiconductive water-repellent layer design provides a stronger water barrier, effectively preventing moisture from penetrating the cable interior and protecting the cable's internal structure from moisture erosion. The metal shielding layer 11, positioned between the two semiconductive water-repellent layers, is effectively protected and fully utilizes its electromagnetic shielding function, minimizing the impact of external electromagnetic interference on the cable's internal signals.

[0051] Example 3

[0052] A composite protective intelligent cable for mountain rail transit, comprising:

[0053] A circular copper conductor 1 is provided with a conductor semiconductive shielding layer 2, an insulating layer 3, an insulating semiconductive shielding layer 4, and a semiconductive water-repellent buffer layer in this order. A metal shielding layer 11 is provided within the semiconductive water-repellent buffer layer, and a waterproof layer 12, an oxygen barrier layer 13, an armor layer 14, an alkali-free glass fiber tape wrapping layer 15, an outer sheath layer 16, and a composite sheath layer 17 are provided outside the semiconductive water-repellent buffer layer in this order. A temperature measurement and communication optical cable is provided within the metal shielding layer 11. The temperature measurement and communication optical cable comprises a first single-mode optical fiber 7, a second single-mode optical fiber 8, a first multimode optical fiber 9, and a second multimode optical fiber 10, each of which is loosely wound with the copper wire. The conductor semiconductive shielding layer 2, the insulating layer 3, and the insulating semiconductive shielding layer 4 are co-extruded. The insulating layer 3 is made of peroxide cross-linked polyethylene insulation. The conductor semiconductive shielding layer 2 is 1.0 mm thick; the insulating layer 3 is 10.2 mm thick; and the insulating semiconductive shielding layer 4 is 1.0 mm thick. The semiconducting water-repellent buffer layer comprises, from the inside out, a first semiconducting water-repellent layer 5 and a second semiconducting water-repellent layer 6. A metal shielding layer 11 is disposed between the first and second semiconducting water-repellent layers 5 and 6. The metal shielding layer 11 is made of sparsely wound copper wires with a diameter of 0.85 mm and a number of 30 wires. This sparsely wound copper wire provides excellent conductivity and mechanical strength, effectively resisting external electromagnetic interference and protecting the stable transmission of signals within the cable. The waterproof layer 12 is formed by longitudinally wrapping a non-ribbed aluminum-plastic composite tape. The thickness of the waterproof layer 12 is 0.2 mm. This longitudinally wrapped non-ribbed aluminum-plastic composite tape provides excellent waterproofing and mechanical strength, effectively preventing moisture from penetrating the cable interior. The oxygen barrier layer 13 is extruded from a halogen-free, low-smoke, flame-retardant polyolefin sheathing material with excellent flame retardancy and crusting properties. The thickness of the oxygen barrier layer 13 is 2.0 mm. This effectively prevents oxygen from entering the cable interior, slowing the aging of the insulation material and extending the cable's service life. The armor layer 14 is a non-magnetic metal tape armor layer; the thickness of the armor layer 14 is 0.12mm. It provides strong mechanical protection to prevent the cable from being damaged by external forces during installation and operation. The armor layer 14 is made of overlapping 0.12mm×50mm brass tapes. It has excellent mechanical strength and corrosion resistance, and can provide long-term and effective protection for the cable. The outer sheath layer 16 is a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame retardancy and excellent shelling properties; the thickness of the outer sheath layer 16 is 3.0mm. The composite sheath layer 17 is a nylon sheath material with high flame retardancy and excellent shelling properties; the thickness of the composite sheath layer 17 is 0.7mm. It has excellent flame retardant and environmental performance, can slow the spread of fire in the event of a fire, and reduce the release of toxic smoke. The combination of the two materials also provides better physical protection against external environmental influences such as ultraviolet rays, chemicals, and mechanical wear.

[0054] Example 4

[0055] A composite protective intelligent cable for mountain rail transit, comprising:

[0056] A circular copper conductor 1 is provided with a conductor semiconductive shielding layer 2, an insulating layer 3, an insulating semiconductive shielding layer 4, and a semiconductive water-repellent buffer layer in this order. A metal shielding layer 11 is provided within the semiconductive water-repellent buffer layer, and a waterproof layer 12, an oxygen barrier layer 13, an armor layer 14, an alkali-free glass fiber tape wrapping layer 15, an outer sheath layer 16, and a composite sheath layer 17 are provided outside the semiconductive water-repellent buffer layer in this order. A temperature measurement and communication optical cable is provided within the metal shielding layer 11. The temperature measurement and communication optical cable comprises a first single-mode optical fiber 7, a second single-mode optical fiber 8, a first multimode optical fiber 9, and a second multimode optical fiber 10, each of which is loosely wound with the copper wire. The conductor semiconductive shielding layer 2, the insulating layer 3, and the insulating semiconductive shielding layer 4 are co-extruded. The insulating layer 3 is made of peroxide cross-linked polyethylene insulation. The conductor semiconductive shielding layer 2 is 1.2 mm thick; the insulating layer 3 is 10.5 mm thick; and the insulating semiconductive shielding layer 4 is 1.2 mm thick. The semiconducting water-repellent buffer layer comprises, from the inside out, a first semiconducting water-repellent layer 5 and a second semiconducting water-repellent layer 6. A metal shielding layer 11 is disposed between the first and second semiconducting water-repellent layers 5 and 6. The metal shielding layer 11 is made of sparsely wound copper wire with a diameter of 0.88 mm and a total of 40 wires. The waterproof layer 12 is formed by longitudinally wrapping a non-corrugated aluminum-plastic composite tape. The thickness of the waterproof layer 12 is 0.3 mm. The oxygen barrier layer 13 is extruded from a halogen-free, low-smoke, flame-retardant polyolefin sheathing material with excellent flame retardancy and shell formation. The thickness of the oxygen barrier layer 13 is 2.4 mm. The armor layer 14 is a non-magnetic metal tape armor layer. The thickness of the armor layer 14 is 0.13 mm. The armor layer 14 is formed by overlapping and wrapping 0.12 mm x 50 mm brass tape. The outer sheath layer 16 is a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame retardancy and excellent crusting properties; the thickness of the outer sheath layer 16 is 3.4 mm; the composite sheath layer 17 is a nylon sheath material with high flame retardancy and excellent crusting properties; the thickness of the composite sheath layer 17 is 0.85 mm.

[0057] Example 5

[0058] A composite protective intelligent cable for mountain rail transit, comprising:

[0059] A Class 2 monofilament circular copper conductor 1 is coated with, in order from the inside out, a semi-conductive conductor shielding layer 2, an insulating layer 3, and an insulating semi-conductive shielding layer 4. These layers are co-extruded. The insulating layer 3 is made of peroxide-cross-linked polyethylene. A semi-conductive water-repellent buffer layer is applied to this outer layer, comprising a first semi-conductive water-repellent layer 5 and a second semi-conductive water-repellent layer 6. A metal shielding layer 11 is applied to the outer layer of the semi-conductive water-repellent buffer layer. Within this metal shielding layer 11 are optical cables for communication and temperature detection. The metal shielding layer 11 is constructed of sparsely wound copper wire. Within this metal shielding layer 11 are optical cables for temperature measurement and communication, including a first single-mode optical fiber 7, a second single-mode optical fiber 8, a first multi-mode optical fiber 9, and a second multi-mode optical fiber 10, each sparsely wound with the copper wire. A waterproof layer 12 is applied to the outer layer of the metal shielding layer 11. This waterproof layer 12 is formed by longitudinally wrapping a non-ribbed aluminum-plastic composite tape. An oxygen barrier layer 13 is provided outside the waterproof layer 12. Oxygen barrier layer 13 is extruded from a halogen-free, low-smoke, flame-retardant polyolefin sheathing material with excellent flame retardancy and crusting properties. An armor layer 14 is provided outside the oxygen barrier layer 13. Armor layer 14 is a non-magnetic metal tape armor layer. Armor layer 14 is formed by overlapping and wrapping 0.12mm x 50mm brass tape. An alkali-free glass fiber tape wrapping layer 15 is provided outside the armor layer 14. An outer sheath layer 16 is provided outside the alkali-free glass fiber tape wrapping layer 15. Outer sheath layer 16 is provided from a halogen-free, low-smoke, flame-retardant polyolefin sheathing material with excellent flame retardancy and crusting properties. A composite sheath layer 17 is provided outside the outer sheath layer 16. Composite sheath layer 17 is provided from a nylon sheathing material with excellent flame retardancy and crusting properties.

[0060] This utility model not only meets the additional performance requirements of 35kV flame-retardant B1 grade composite protective intelligent cable for mountain rail transit, such as wear resistance, rodent and ant resistance, and UV protection, but also has a temperature detection optical cable arranged in the metal shielding layer, which can effectively monitor the entire line and cooperate with the main console management to realize automatic alarm when the temperature exceeds the set temperature, power-off protection and line switching functions, so as to avoid fire situations such as electrical short circuits, and ensure the safe and reliable operation of rail transit lines.

[0061] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A composite protective intelligent cable for mountain rail transit, characterized in that: include: A circular copper conductor (1) is provided with a conductor semiconductive shielding layer (2), an insulating layer (3), an insulating semiconductive shielding layer (4), and a semiconductive water-repellent buffer layer in sequence on the outside of the circular copper conductor (1); a metal shielding layer (11) is provided inside the semiconductive water-repellent buffer layer; a waterproof layer (12), an oxygen-isolating layer (13), an armor layer (14), an alkali-free glass fiber tape wrapping layer (15), an outer sheath layer (16), and a composite sheath layer (17) are provided outside the semiconductive water-repellent buffer layer in sequence; and a temperature measurement and communication optical cable are provided inside the metal shielding layer (11).

2. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The temperature measurement and communication optical cable comprises a first single-mode optical fiber (7), a second single-mode optical fiber (8), a first multi-mode optical fiber (9) and a second multi-mode optical fiber (10), which are respectively sparsely wound with the copper wire at the same time.

3. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The conductor semiconductive shielding layer (2), the insulating layer (3) and the insulating semiconductive shielding layer (4) are co-extruded; the insulating layer (3) is a peroxide cross-linked polyethylene insulating material; the thickness of the conductor semiconductive shielding layer (2) is 0.8 to 1.2 mm; the thickness of the insulating layer (3) is 10.0 to 10.5 mm; and the thickness of the insulating semiconductive shielding layer (4) is 0.8 to 1.2 mm.

4. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The semiconducting water buffer layer comprises, from the inside out, a first semiconducting water layer (5) and a second semiconducting water layer (6); and a metal shielding layer (11) is arranged between the first semiconducting water layer (5) and the second semiconducting water layer (6).

5. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The metal shielding layer (11) is formed by sparsely wound copper wires; the diameter of the copper wires is 0.85-0.88 mm, and the number of the copper wires is 30-40.

6. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The waterproof layer (12) is formed by longitudinally wrapping a non-ribbed aluminum-plastic composite tape; the thickness of the waterproof layer (12) is 0.2-0.3 mm.

7. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The oxygen-isolating layer (13) is formed by extruding a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame-retardant and excellent shelling properties; the thickness of the oxygen-isolating layer (13) is 2.0-2.4 mm.

8. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The armor layer (14) is a non-magnetic metal belt armor layer; the thickness of the armor layer (14) is 0.12-0.13 mm.

9. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The armor layer (14) is formed by overlapping and wrapping 0.12mm×50mm brass strips.

10. The composite protective intelligent cable for mountain rail transit according to claim 1, characterized in that: The outer sheath layer (16) is a halogen-free, low-smoke, flame-retardant polyolefin sheath material with high flame retardancy and excellent shelling properties; the thickness of the outer sheath layer (16) is 3.0-3.4 mm; the composite sheath layer (17) is a nylon sheath material with high flame retardancy and excellent shelling properties; the thickness of the composite sheath layer (17) is 0.7-0.85 mm.

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