Waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power station

Abstract

The utility model discloses a waterproof and shockproof K1 reinforced multifunctional composite cable for a nuclear power station, and belongs to the technical field of medium-voltage cables. The cable comprises a signal transmission wire core, a power transmission wire core and an outer sleeve. The signal transmission wire core comprises optical fiber units used for signal transmission and a steel core reinforcing unit used for structural reinforcement, and the multiple optical fiber units are twisted around the steel core reinforcing unit to form a first wire harness body; the power transmission wire core comprises a conductor for transmitting power and a heat-aging-resistant insulating layer, and the heat-aging-resistant insulating layer wraps the conductor; the plurality of conductors are twisted around the first wire harness body to form a second wire harness body; the outer sleeve wraps the outer side of the second wire harness body, and a filling layer used for flame retardation is filled between the second wire harness body and the outer sleeve. According to the utility model, a signal transmission cable and a power transmission cable can be integrated together, and structural reinforcement and flame retardant treatment are carried out, so that the space is saved, the weight is reduced, and the suitability of the cable and a nuclear power station is improved.

Description

Technical Field

[0001] This utility model relates to the field of medium-voltage cable technology, and in particular to a waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants. Background Technology

[0002] With the acceleration of urbanization in my country, issues such as social stability and urban safety are gradually emerging. Nuclear power plant cable technology is a key technology for infrastructure construction. Therefore, with the further development of socio-economic development and signal technology, the application of nuclear power plant cables will become a new trend in the future.

[0003] The development of China's nuclear power plant cable industry began in the late 1990s and has gone through four stages: technology introduction, professional market introduction, technology improvement, and application of technology in various industries. Currently, the domestic nuclear power plant cable industry is relatively mature and is increasingly being promoted to various fields, expanding into terminal equipment, value-added services, and other products and services. After years of development, my country's nuclear power technology has reached a world-leading position, and has helped many countries build nuclear power plants internationally. Chinese nuclear power technology has successfully gained a reputation both at home and abroad.

[0004] The cables used in nuclear power plants are often separate, carrying signals and electricity separately. They occupy too much space and are too heavy, making it difficult to meet actual needs. Utility Model Content

[0005] In view of this, it is necessary to provide a waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants to solve the problem that existing cables cannot transmit signals and power simultaneously.

[0006] This utility model provides a waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants.

[0007] include:

[0008] The signal transmission core includes optical fiber units for signal transmission and steel core reinforcement units for structural reinforcement. Multiple optical fiber units are twisted around the steel core reinforcement units to form a first wire bundle.

[0009] A power transmission core, comprising a conductor for transmitting power and a heat-resistant insulation layer, the heat-resistant insulation layer covering the outside of the conductor; a plurality of the conductors are twisted around a first wire bundle to form a second wire bundle;

[0010] An outer jacket covers the outside of the second wire harness, and a flame-retardant filler layer is filled between the second wire harness and the outer jacket.

[0011] Furthermore, the steel core reinforcement unit includes linearly arranged steel core cables.

[0012] Furthermore, the conductor is an aluminum alloy cable.

[0013] Furthermore, the optical fiber unit includes an optical cable for optical signal transmission.

[0014] Furthermore, the filling layer is fireproof putty.

[0015] Furthermore, the outer casing includes a waterproof layer, a shockproof protective layer, and a radiation protection layer nested sequentially from the inside out, with the inner and outer sides of the waterproof layer connected to the filling layer and the shockproof protective layer, respectively.

[0016] Furthermore, the shock-absorbing protective layer is a loosely wound metal wire protective layer.

[0017] Furthermore, the radiation protection layer is a high-molecular-weight polyolefin protective layer that is resistant to both oils and acids and alkalis, and has low smoke and halogen-free properties.

[0018] Furthermore, a lubricating layer is provided between the optical fiber unit and the steel core reinforcement unit.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] (1) This utility model discloses a waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants, which includes a signal transmission core. The signal transmission core comprises an optical fiber unit and a steel core reinforcement unit. The optical fiber unit can transmit signals, and the steel core reinforcement unit can reinforce the cable structure. Multiple optical fiber units are twisted together around the steel core reinforcement unit to form a first cable bundle. The first cable bundle is reinforced by the steel core reinforcement unit, which increases the structural stability of the cable and enables it to maintain good shock resistance when facing high-voltage power transmission or external vibration impact. The steel core reinforcement unit can effectively prevent the cable from being damaged by mechanical tension or external interference during long-term use, thus improving the cable's safety and service life. The twisted structure of the optical fiber unit and the steel core reinforcement unit can further improve the overall mechanical strength of the cable and enhance its resistance to tension, bending and external impact. At the same time, the twisted structure can disperse the impact force brought by external vibration and avoid cable damage caused by vibration or equipment operation.

[0021] (2) This utility model discloses a waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants, which includes a power transmission core. The power transmission core comprises a conductor for transmitting power and a heat-resistant insulation layer. The heat-resistant insulation layer covers the outside of the conductor and can effectively resist the influence of the high-temperature environment in nuclear power plants, preventing the cable from aging or being damaged under long-term high-temperature conditions. Multiple conductors are twisted around a first wire bundle to form a second wire bundle. By twisting multiple conductors around the first wire bundle, electromagnetic interference (EMI) and signal noise that may be generated during power transmission can be effectively reduced. The twisted structure helps to reduce the influence of the external electromagnetic environment on the power signal, ensuring the stability and efficiency of power transmission. The twisted structure allows multiple conductors to share the external tensile force, increasing the tensile strength of the cable and enabling it to withstand greater mechanical stress during long-term use, reducing damage caused by stretching or friction. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0024] Figure 2 This is a cross-sectional schematic diagram of the signal transmission line core in this utility model.

[0025] In the diagram, 100 is the signal transmission core; 110 is the optical fiber unit; and 120 is the steel core reinforcement unit.

[0026] 200. Power transmission core; 210. Conductor; 220. Heat-resistant insulation layer;

[0027] 300. Outer layer; 310. Waterproof layer; 320. Shockproof protective layer; 330. Radiation protection layer;

[0028] 400. Fill layer. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0030] This embodiment describes a waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants, which relates to the field of medium-voltage cable technology. By integrating signal transmission cables and power transmission cables together and performing structural reinforcement and flame-retardant treatment, it saves space, reduces weight, and improves the cable's compatibility with nuclear power plants.

[0031] Please see Figures 1 to 2 This embodiment describes a waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants, comprising a signal transmission core 100, a power transmission core 200, and an outer jacket 300. The signal transmission core 100 can transmit optical signals and specifically reinforce the structure, the power transmission core 200 can transmit electrical energy, and the outer jacket 300 can perform flame retardant treatment on the composite cable to improve its fire resistance and flame retardant performance.

[0032] The signal transmission core 100 includes an optical fiber unit 110 and a steel core reinforcement unit 120. The optical fiber unit 110 transmits signals, while the steel core reinforcement unit 120 reinforces the cable structure. Multiple optical fiber units 110 are twisted together around the steel core reinforcement unit 120 to form a first cable bundle. The first cable bundle reinforces the optical fiber units 110 through the steel core reinforcement unit 120, increasing the cable's structural stability and enabling it to maintain good shock resistance when facing high-voltage power transmission or external vibration and impact. The steel core reinforcement unit 120 effectively prevents damage to the cable due to mechanical tension or external interference during long-term use, improving the cable's safety and service life. The twisted structure of the optical fiber unit 110 and the steel core reinforcement unit 120 further improves the overall mechanical strength of the cable, enhancing its resistance to tension, bending, and external impact. Simultaneously, the twisted structure disperses the impact force from external vibrations, preventing cable damage caused by vibration or equipment operation.

[0033] The power transmission core 200 includes a conductor 210 for transmitting power and a heat-resistant insulation layer 220. The heat-resistant insulation layer 220 covers the outside of the conductor 210 and can effectively resist the effects of the high-temperature environment in nuclear power plants, preventing the cable from aging or being damaged under long-term high-temperature conditions. Multiple conductors 210 are twisted around a first wire bundle to form a second wire bundle. By twisting multiple conductors 210 around the first wire bundle, electromagnetic interference (EMI) and signal noise that may be generated during power transmission can be effectively reduced. The twisted structure helps to reduce the influence of the external electromagnetic environment on the power signal, ensuring the stability and efficiency of power transmission. The twisted structure allows multiple conductors 210 to share the external tensile force, increasing the tensile strength of the cable and enabling it to withstand greater mechanical stress during long-term use, reducing damage caused by tension or friction.

[0034] The second wiring harness combines signal transmission core 100 and power transmission core 200, achieving dual signal and power transmission functions through the combination of optical fiber and electrical conductor 210. This second wiring harness reduces the complexity of cable routing in nuclear power plants, minimizes space requirements, meets the needs of different systems, and improves the compactness and efficiency of the facility.

[0035] The outer jacket 300 covers the outside of the second cable harness, providing protection for the entire harness. A flame-retardant filler layer 400 is placed between the second cable harness and the outer jacket 300, giving the cable excellent flame-retardant properties. In the event of an ignition source, the cable can effectively slow the spread of fire, preventing it from affecting other facilities in the nuclear power plant and improving the overall safety and protection capabilities of the nuclear power plant.

[0036] In some embodiments, please refer to Figure 1 The steel-core reinforcement unit 120 includes linearly arranged steel-core cables. As an internal reinforcement structure of the cable, the steel-core cables effectively improve the cable's tensile strength and compressive strength. In environments like nuclear power plants that require high mechanical strength, cables frequently need to withstand certain tensile and compressive forces. The linear arrangement of the steel-core cables allows them to evenly distribute external forces during tension, thereby effectively reducing cable breakage or damage caused by external forces.

[0037] Steel-cored cables provide robust structural support, effectively dispersing and absorbing the impact force of vibrations or mechanical shocks. The linearly arranged steel core enhances the cable's seismic resistance through its rigidity and strength, ensuring stable operation of cables in high-safety environments such as nuclear power plants under earthquake or vibration conditions.

[0038] In some embodiments, please refer to Figure 2 Conductor 210 is made of aluminum alloy. Aluminum alloy has high strength and low density, and is lighter than traditional copper conductor 210. Using aluminum alloy as the conductor helps reduce the overall weight of the cable, reducing labor intensity during transportation and installation, making it particularly suitable for large facilities such as nuclear power plants that require extensive cable laying. Lightweight cables facilitate wiring in confined or complex installation spaces and reduce the burden on the structure.

[0039] Aluminum alloys are more economical than copper, with abundant and lower material sources. Therefore, cables using 210 aluminum alloy conductors can effectively reduce manufacturing costs. This helps large-scale infrastructure projects such as nuclear power plants control costs and improve economic efficiency while ensuring cable performance.

[0040] In some embodiments, please refer to Figure 1 The optical fiber unit 110 includes an optical cable for transmitting optical signals. The optical fiber has extremely high bandwidth and transmission speed, far exceeding that of the traditional power conductor 210. Transmitting optical signals through the optical fiber unit 110 enables high-capacity, high-speed data transmission, ensuring that various control signals, monitoring data, and communication information of the nuclear power plant can be transmitted quickly and accurately, meeting the real-time and high-efficiency requirements of the nuclear power plant.

[0041] Meanwhile, fiber optic signal transmission is unaffected by electromagnetic interference; electromagnetic fields and other electronic devices will not interfere with fiber optic signals. This gives fiber optics a significant advantage in complex electromagnetic environments such as nuclear power plants. Traditional cables are often affected by electromagnetic waves, leading to signal quality degradation, while fiber optics ensure signal purity and stability, preventing any interference from affecting the operation of critical systems in nuclear power plants.

[0042] Furthermore, fiber optic signal transmission is unaffected by electromagnetic radiation, thus maintaining stable operation even in high-radiation environments. Nuclear power plants are high-radiation environments, and using fiber optic units 110 can effectively prevent signal distortion or performance degradation caused by cable radiation.

[0043] In some embodiments, the filler layer 400 is fire-retardant putty, which has excellent fire-resistant properties and can effectively prevent the spread and penetration of flames under fire conditions. The fire-retardant putty allows it to form a robust barrier in the event of a fire, preventing flames from spreading into the cable and protecting the cable's transmission lines from fire damage. Especially in high-safety locations such as nuclear power plants, where cables need to withstand extreme fire environments, fire-retardant putty effectively ensures the cable's continuity during a fire, preventing further escalation of the accident.

[0044] The application of fire-resistant sealant gives the cables fire-resistant capabilities, ensuring effective power and signal transmission even during a fire. This performance is crucial in environments like nuclear power plants where cable reliability is extremely important, ensuring that critical safety systems continue to function normally under extreme fire conditions, thereby enhancing the overall safety of the facility.

[0045] Fire-retardant putty is applied via extrusion molding. During extrusion, the putty exhibits excellent adhesion, allowing it to quickly adhere to the outside of the cable core and air-dry and cure within 4 hours. This characteristic enables rapid filling and curing during production, reducing the production cycle and improving manufacturing efficiency. Simultaneously, the rapidly cured fire-retardant layer exhibits good stability and long-term fire resistance, ensuring continuous fire protection for the cable during use.

[0046] In some embodiments, please refer to Figure 1The outer jacket 300 comprises, from the inside out, a waterproof layer 310, a shockproof protective layer 320, and a radiation-proof protective layer 330, nested sequentially. The waterproof layer 310 effectively isolates moisture from the cable, preventing external moisture or humid environments from affecting the cable's performance. The shockproof protective layer 320 effectively mitigates the impact of external vibrations on the cable, especially in environments with earthquakes or other mechanical vibrations. It absorbs and disperses external vibration energy, protecting the cable's internal core from damage. The radiation-proof protective layer 330 provides effective shielding, reducing interference from external radiation to internal signals. Particularly in high-radiation environments such as nuclear power plants, it effectively prevents radiation from interfering with internal power or signal transmission, ensuring stable cable operation.

[0047] The multi-layered protection structure of the waterproof layer 310, the shockproof protective layer 320, and the radiation protective layer 330 provides multiple layers of protection, enhancing the overall performance of the cable from various aspects. This multi-layered protection structure enables the cable to perform at its maximum efficiency in complex environments, meeting the stability and safety requirements of demanding locations such as nuclear power plants.

[0048] In some embodiments, please refer to 1. The shockproof protective layer 320 is a loosely wound metal wire protective layer. Through the braided structure of the metal wires, the loosely wound metal wire protective layer can effectively absorb and disperse external mechanical impacts and vibrations, reducing damage to the cable from external forces. Especially in high-risk locations such as nuclear power plants, cables need to withstand external impacts such as earthquakes and equipment vibrations. The loosely wound structure of the metal wires can significantly improve the cable's resistance to these external forces, ensuring that the cable maintains stable operation in extreme environments.

[0049] The loosely wound protective layer of metal wire combines the high strength of metal wire with the flexibility of the structure, providing sufficient flexibility while ensuring mechanical strength such as impact and tensile strength. When the cable is bent or subjected to stress, the metal wire layer can maintain a certain degree of flexibility, making it less prone to breakage or deformation. This allows the cable to be installed flexibly in complex deployment environments while maintaining high physical protection performance.

[0050] In some embodiments, please refer to Figure 1 The radiation protection layer 330 is a high-molecular-weight polyolefin protective layer that is resistant to both oils and acids / alkalis, and features low smoke and halogen-free properties. Polyolefin materials possess excellent electromagnetic shielding performance, effectively reducing radiation interference with signal and power transmission within the cable. In environments with high radiation levels, such as nuclear power plants, the radiation protection layer 330 can effectively block the influence of external radiation sources, ensuring that the cable's signal and power transmission are not affected by radiation, thereby maintaining the stability and reliability of the system.

[0051] Radiation protection layer 330 exhibits excellent resistance to both oils (mineral oil, fuel oil, etc.) and acids and alkalis. Nuclear power plants and related facilities may be exposed to oily, acidic, or alkaline environments. Using radiation protection layer 330 can effectively prevent external oils, acids, and alkalis from corroding cables, ensuring long-term stable operation of cables and protecting them from environmental corrosion.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A waterproof and shockproof K1-reinforced multifunctional composite cable for nuclear power plants, characterized in that, include: The signal transmission core includes optical fiber units for signal transmission and steel core reinforcement units for structural reinforcement. Multiple optical fiber units are twisted around the steel core reinforcement units to form a first wire bundle. A power transmission core, comprising a conductor for transmitting power and a heat-resistant insulation layer, the heat-resistant insulation layer covering the outside of the conductor; a plurality of the conductors are twisted around a first wire bundle to form a second wire bundle; An outer jacket covers the outside of the second wire harness, and a flame-retardant filler layer is filled between the second wire harness and the outer jacket.

2. The waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 1, characterized in that, The steel core reinforcement unit includes linearly arranged steel core cables.

3. The waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 1, characterized in that, The conductor is an aluminum alloy cable.

4. The waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 1, characterized in that, The optical fiber unit includes an optical cable for optical signal transmission.

5. The waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 1, characterized in that, The filling layer is fireproof putty.

6. The waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 1, characterized in that, The outer casing includes a waterproof layer, a shockproof protective layer, and a radiation protection layer nested sequentially from the inside out. The inner and outer sides of the waterproof layer are connected to the filling layer and the shockproof protective layer, respectively.

7. A waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 6, characterized in that, The shockproof protective layer is a loosely wound metal wire protective layer.

8. A waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 6, characterized in that, The radiation protection layer is a high-molecular-weight polyolefin protective layer that is resistant to both oils and acids and alkalis, and has low smoke and halogen-free properties.

9. The waterproof and shockproof K1 reinforced multifunctional composite cable for nuclear power plants according to claim 1, characterized in that, A lubricating layer is provided between the optical fiber unit and the steel core reinforcement unit.

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