Low-temperature superconducting semi-steel cable

Abstract

The invention relates to the technical field of cables, in particular to a low-temperature superconducting semi-steel cable which comprises an outer sheath layer used for protecting the internal structure of the cable, and a steel reinforcing layer arranged on the inner side of the outer sheath layer and used for increasing the mechanical strength of the cable. The low-temperature heat conduction layer is arranged on the inner side of the steel reinforcing layer and is used for optimizing the heat conduction performance of the cable in a low-temperature environment; the shielding layer is arranged on the inner side of the low-temperature thermal conductive layer and used for isolating electromagnetic interference and ensuring stable transmission of conductive signals; the filling layer is located on the inner side of the shielding layer and used for filling gaps in the cable, maintaining the structural stability of the cable and preventing external substances from invading, and by designing dual protection of the steel reinforcing layer and the outer sheath layer, the low-temperature superconducting semi-steel cable can have higher compression resistance, tension resistance and impact resistance when facing the influence of the external environment; the steel reinforcing layer not only provides additional mechanical strength, but also effectively prevents the cable from being broken or deformed in the transportation, installation and use processes.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a low-temperature superconducting semi-steel cable. Background Art

[0002] As a new type of power transmission technology, low-temperature superconducting cable is widely used in efficient energy transmission systems because of its excellent performance of zero resistance at low temperatures. Existing low-temperature superconducting cables are composed of superconducting materials, insulating layers, protective layers, etc., among which superconducting materials are the core part to achieve zero resistance. However, these cables face various technical challenges in actual use. First of all, the superconducting materials of low-temperature superconducting cables are extremely sensitive to temperature changes, so how to maintain a stable temperature distribution in a low-temperature environment is crucial. In the prior art, although some cable designs control the temperature by using cryogenic liquids or specific insulating materials, these designs often fail to fully solve the problem of local overheating or overcooling caused by temperature gradients, thereby causing the failure of superconducting materials and affecting the long-term stable operation of the cable.

[0003] In addition, during installation, transportation and use, low-temperature superconducting cables are susceptible to external mechanical impact, tension, compression and other forces, which may cause deformation or breakage of the cable structure. Most existing cable structures improve their impact resistance by strengthening the outer sheath, but this design is often insufficient to withstand extreme external environments, especially under conditions of high voltage or mechanical damage. Therefore, low-temperature superconducting cables in the prior art still have certain fragility when facing external physical damage.

[0004] In order to solve the above problems, a solution is proposed. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a low-temperature superconducting semi-steel cable, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A low-temperature superconducting semi-steel cable, comprising:

[0007] Outer sheath layer, used to protect the internal structure of the cable;

[0008] The steel reinforcement layer is arranged on the inner side of the outer sheath layer to increase the mechanical strength of the cable;

[0009] The low-temperature thermal conductive layer is arranged on the inner side of the steel reinforcement layer to optimize the thermal conductivity of the cable in a low-temperature environment;

[0010] The shielding layer is arranged inside the low-temperature thermal conductive layer to isolate electromagnetic interference and ensure stable transmission of the conductivity signal;

[0011] The filling layer is located inside the shielding layer and is used to fill the internal gaps of the cable to maintain the structural stability of the cable and prevent the intrusion of foreign substances;

[0012] The temperature measuring optical fiber is installed inside the seamless steel pipe to monitor the temperature changes inside the cable in real time and accurately obtain the temperature distribution information of the low-temperature superconducting cable through sensing technology;

[0013] A seamless steel pipe is arranged inside the filling layer to protect the temperature measuring optical fiber from direct damage by the external environment;

[0014] The electric conductor is arranged inside the filling layer, and together with the seamless steel pipe and the temperature measuring optical fiber, constitutes the conductive core part of the cable.

[0015] Preferably, the temperature measuring optical fiber and the electric conductor are arranged independently of each other via a filling layer, and the temperature measuring optical fiber and the seamless steel pipe are enclosed together in the filling layer to avoid direct exposure to the external environment.

[0016] Preferably, the material used for the low-temperature thermal conductive layer is graphene.

[0017] Preferably, the steel reinforcement layer is made of stainless steel, and the electric conductor is made of low-temperature superconducting material, which can maintain a superconducting state at extremely low temperatures.

[0018] Preferably, the outer sheath layer is made of high-strength polyethylene, and a plurality of low-temperature superconducting cables are provided in parallel in the electrical conductor.

[0019] Preferably, the material used for the filling layer is silicone rubber, and the shielding layer adopts a multi-layer structure, wherein the outer shielding layer uses copper-plated aluminum material, and the inner shielding layer uses a tinned copper wire braided mesh.

[0020] Preferably, a plurality of mounting rings are installed on the outer surface of the outer sheath layer, a plurality of wear-resistant protrusions are equidistantly arranged on the outer surface of the mounting rings, and anti-slip stripes are arranged on the outer surface of the wear-resistant protrusions.

[0021] Preferably, a plurality of connecting strips are provided on the outer surface of the steel reinforcement layer, and reinforcing ribs are fixedly connected to the outer surface of the connecting strips.

[0022] Preferably, a support bar is fixedly connected to the outer surface of the seamless steel pipe, and the outer side of the support bar is in contact with the inner wall of the low-temperature heat conductive layer.

[0023] The present invention provides a low-temperature superconducting semi-steel cable. It has the following beneficial effects:

[0024] 1. The present invention provides dual protection of the steel reinforcement layer and the outer sheath layer, so that the low-temperature superconducting semi-steel cable can have stronger compression, tension and impact resistance when facing the influence of the external environment. The steel reinforcement layer not only provides additional mechanical strength, effectively preventing the cable from breaking or deforming during transportation, installation and use, but also resists external physical damage. In addition, the outer sheath layer is made of high-strength polyethylene, which further improves the durability and corrosion resistance of the cable and effectively extends the service life of the cable.

[0025] 2. The present invention adds a low-temperature thermal conductive layer, which can not only effectively improve the thermal conductivity of the cable, but also maintain excellent thermal conductivity in a low-temperature environment. Since the low-temperature thermal conductive layer uses graphene material, the temperature distribution inside the cable is more uniform, which reduces the negative impact of the temperature gradient on the cable performance, effectively avoids the failure or malfunction of the superconducting material caused by local overheating or overcooling, and ensures the stable operation of the cable.

[0026] 3. The present invention designs the temperature measuring optical fiber and the seamless steel tube inside the cable, and effectively seals the temperature measuring optical fiber with the filling layer, so that the cable can monitor the change of its internal temperature in real time. The temperature measuring optical fiber provides accurate temperature distribution data, which can effectively prevent the temperature sensor from being damaged by the external environment and ensure its long-term stable operation.

[0027] 4. The present invention adds mounting rings, wear-resistant protrusions, anti-slip stripes and other structures that cooperate with each other to improve the wear resistance of the outer surface of the cable, reduce the wear of the cable when it rubs against the ground, pipes, walls and other surfaces, thereby significantly improving the durability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A perspective view of the present invention;

[0029] Figure 2 It is a schematic diagram of the mounting ring structure of the present invention;

[0030] Figure 3 It is a schematic diagram of the reinforcing rib structure of the present invention;

[0031] Figure 4 It is a schematic diagram of the support bar structure of the present invention;

[0032] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0033] Figure numerals: 1. outer sheath layer; 2. steel reinforcement layer; 3. low-temperature thermal conductive layer; 4. shielding layer; 5. filling layer; 6. temperature measuring optical fiber; 7. seamless steel pipe; 8. electric conductor; 9. support bar; 10. connecting bar; 11. reinforcing rib; 12. mounting ring; 13. wear-resistant protrusion; 14. anti-slip stripes. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0035] Example: Figure 1-Figure 5 As shown, the outer sheath layer 1 is used to protect the internal structure of the cable and prevents external pollutants such as moisture, dust, and chemicals from entering the cable; it provides basic mechanical protection to prevent the cable from being damaged by external forces during transportation, installation, and use.

[0036] A steel reinforcement layer 2 is arranged on the inner side of the outer sheath layer 1 to increase the mechanical strength of the cable;

[0037] Specifically, the steel reinforcement layer 2 provides physical protection for the cable during transportation, laying and use, preventing the cable from being mechanically damaged, especially when it needs to withstand external compression, stretching or bending.

[0038] The low-temperature heat-conducting layer 3 is arranged on the inner side of the steel reinforcing layer 2 to optimize the heat conduction performance of the cable in a low-temperature environment;

[0039] Specifically, the low-temperature thermal conductive layer 3 can help the cable maintain a uniform temperature in a superconducting state, prevent local overheating or overcooling, promote heat exchange inside and outside the cable, and maintain a required low-temperature environment.

[0040] The shielding layer 4 is arranged inside the low-temperature thermal conductive layer 3 to isolate electromagnetic interference and ensure stable transmission of the conductivity signal;

[0041] The filling layer 5 is located inside the shielding layer 4 and is used to fill the internal gap of the cable to maintain the structural stability of the cable and prevent the intrusion of foreign substances;

[0042] Specifically, the filling layer 5 fills the gaps inside the cable to ensure the integrity of the internal structure of the cable; improves the physical stability of the cable to avoid loosening of the cable structure due to external forces during installation or long-term use; prevents external substances (such as water, chemicals, etc.) from entering the cable, and is sometimes used to isolate the air to avoid oxidation reactions inside the cable.

[0043] The temperature measuring optical fiber 6 is arranged inside the seamless steel tube 7 and is used to monitor the temperature change inside the cable in real time and accurately obtain the temperature distribution information of the low-temperature superconducting cable through sensing technology;

[0044] The seamless steel tube 7 is arranged inside the filling layer 5 to protect the temperature measuring optical fiber 6 from direct damage by the external environment;

[0045] Specifically, the seamless steel tube 7 provides certain mechanical support and increases the overall structural strength of the cable.

[0046] The electric conductor 8 is arranged inside the filling layer 5, and together with the seamless steel pipe 7 and the temperature measuring optical fiber 6 constitutes the conductive core part of the cable.

[0047] Specifically, the electrical conductors 8 are responsible for the transmission of electrical energy.

[0048] The temperature measuring optical fiber 6 and the electric conductor 8 are arranged independently of each other through the filling layer 5, and the temperature measuring optical fiber 6 and the seamless steel pipe 7 are enclosed in the filling layer 5 together to avoid being directly exposed to the external environment.

[0049] The material used for the low-temperature thermal conductive layer 3 is graphene, the steel reinforcement layer 2 is made of stainless steel, the electric conductor 8 is a low-temperature superconducting material that can maintain a superconducting state at extremely low temperatures, the outer sheath layer 1 is made of high-strength polyethylene, and a plurality of low-temperature superconducting cables are arranged in parallel in the electric conductor 8. The material used for the filling layer 5 is silicone rubber, and the shielding layer 4 adopts a multi-layer structure, in which the outer shielding uses copper-plated aluminum material, and the inner shielding uses a tinned copper wire braided mesh.

[0050] Specifically, graphene is a material composed of a single layer of carbon atoms arranged in a hexagonal lattice, which has excellent thermal conductivity, electrical conductivity and mechanical strength. The thermal conductivity of graphene is particularly important in low-temperature environments, because at these extremely low temperatures, heat dissipation must be effectively controlled. Graphene has extremely high thermal conductivity and can effectively conduct heat away from low-temperature areas, avoiding local overheating or heat accumulation, thereby protecting superconducting materials from remaining in the optimal operating temperature range.

[0051] In addition, graphene's structural stability and thermal conductivity also make it an ideal thermal management material in low-temperature environments. Its high thermal conductivity achieves temperature balance, making the entire system more efficient when working at extremely low temperatures.

[0052] The steel reinforcement layer 2 is used to improve the mechanical strength and durability of the structure, and the electrical conductor 8 is partially made of low-temperature superconducting materials. Superconducting materials can achieve the characteristic of conducting current with zero resistance at certain temperatures, significantly improving the efficiency of energy transmission. In a low-temperature environment, these superconducting materials will maintain a superconducting state, allowing current to be conducted with nearly zero resistance, greatly reducing energy loss and heat generation. This is crucial for many high-efficiency applications (such as high-energy physics experiments, magnetic resonance imaging (MRI) equipment, particle accelerators, etc.). Low-temperature superconducting materials include alloys such as niobium-tin (Nb3Sn), niobium-titanium (NbTi), and some high-temperature superconducting materials.

[0053] In order to improve the current carrying capacity and reduce the resistance of the cable, a plurality of low-temperature superconducting cables are designed in parallel inside the conductor 8. The parallel design means that multiple superconducting cables work at the same time, share the conducted current, reduce the load of a single cable, and improve the overall current transmission efficiency. In addition, multiple parallel superconducting cables can also improve the fault tolerance of the system. If one of the cables has a problem, the other cables can still maintain the normal transmission of current, thereby enhancing the reliability and stability of the system.

[0054] The main function of the outer sheath layer 1 is to provide mechanical protection, isolate the influence of the external environment, and also prevent the materials inside the cable from being exposed to adverse environmental factors such as air or moisture. The filling layer 5 is used to provide insulation, buffering or sealing. Here, silicone rubber is used for the filling layer 5, and its main advantages are excellent electrical insulation performance and low temperature resistance. Silicone rubber can still maintain elasticity and durability at low temperatures and will not become brittle like other plastic materials. In addition, silicone rubber also has good anti-aging ability and chemical corrosion resistance, which makes it an ideal choice for adapting to various harsh environments. The function of the shielding layer 4 is to prevent external electromagnetic interference (EMI) from affecting the transmission of internal signals, or to prevent the electromagnetic radiation of internal signals from affecting external devices. Multi-layer structure shielding can improve shielding effectiveness through the combination of different materials.

[0055] The outer surface of the outer sheath layer 1 is provided with a plurality of mounting rings 12, the outer surface of the mounting rings 12 is provided with a plurality of wear-resistant protrusions 13 at equal intervals, and the outer surface of the wear-resistant protrusions 13 is provided with anti-slip stripes 14. The outer surface of the steel reinforcement layer 2 is provided with a plurality of connecting strips 10, and the outer surface of the connecting strips 10 is fixedly connected with reinforcing ribs 11. The outer surface of the seamless steel pipe 7 is fixedly connected with a support strip 9, and the outer side of the support strip 9 is in contact with the inner wall of the low-temperature thermal conductive layer 3.

[0056] Specifically, the wear-resistant protrusions 13 are protrusion structures evenly distributed on the outer surface of the mounting ring 12. Since the pipeline or equipment will be subjected to friction and wear during use, the wear-resistant protrusions 13 are designed to reduce friction with external objects and protect the outer sheath layer 1 from wear. Anti-slip stripes 14 are set on the outer surface of the wear-resistant protrusions 13 to increase the friction of the surface so that the object is not easy to slide or fall off. In practical applications, it is to ensure the stability of the cable during operation and avoid failure or safety hazards caused by sliding.

[0057] The steel reinforcement layer 2 is a reinforcement layer of the pipeline or mechanical parts, which is made of high-strength steel. The purpose is to improve the mechanical strength and durability of the entire structure so that it can withstand greater internal and external pressure or impact.

[0058] The reinforcing ribs 11 are reinforcing structures on the connecting strip 10, which are used to increase the bending and tensile resistance of the component. They enable the connecting strip 10 to withstand greater loads or forces, thereby enhancing the stability and durability of the overall structure.

[0059] The support bar 9 is used to provide additional support or enhance the stability of the cable.

[0060] The outer side of the support bar 9 contacts the inner wall of the low-temperature heat-conducting layer 3, which means that the support bar 9 is closely matched with the low-temperature heat-conducting layer 3. This design optimizes the heat conduction process or prevents the influence of low temperature on the outside of the pipeline. The support bar 9 not only plays a mechanical support role, but also cooperates with the heat-conducting layer to help maintain the stability of the structure and the effective transmission of heat in a low-temperature environment.

[0061] Working principle: The outer sheath layer 1 is made of high-strength polyethylene, which has good wear resistance, corrosion resistance and weather resistance, and can effectively extend the service life of the cable. The steel reinforcement layer 2 is arranged on the inner side of the outer sheath layer 1 and is made of stainless steel material, which can significantly improve the tensile, compressive and impact resistance of the cable. The low-temperature thermal conductive layer 3 is located on the inner side of the steel reinforcement layer 2 and is made of high thermal conductivity materials such as graphene to optimize the thermal management performance of the cable. Since the low-temperature superconducting cable works in a low-temperature environment, the uniformity of temperature distribution is crucial to the stability of the cable. The extremely high thermal conductivity of graphene can quickly and evenly conduct heat inside and outside the cable, thereby reducing the generation of temperature gradients and preventing the degradation of superconducting material performance due to local overcooling or overheating.

[0062] The shielding layer 4 is used to isolate external electromagnetic interference and ensure the stable transmission of the conductivity signal in the low-temperature superconducting cable. The filling layer 5 is located inside the shielding layer 4 and uses materials such as silicone rubber to fill the gaps inside the cable. This layer has good elasticity and sealing properties, which can effectively prevent external substances such as moisture and chemical corrosives from invading the interior of the cable while maintaining the overall structural stability of the cable. In addition, the filling layer 5 can further improve the mechanical strength of the cable and prevent the internal components from loosening or deformation.

[0063] The temperature measuring optical fiber 6 is arranged in parallel with the electrical conductor 8 to monitor the temperature change in real time inside the cable. The optical fiber sensing technology can accurately obtain the temperature distribution information inside the cable.

[0064] The electric conductor 8 is located inside the filling layer 5 and is the core conductive part of the cable. The electric conductor 8 is made of low-temperature superconducting material, which can maintain a superconducting state at extremely low temperatures and achieve zero-resistance current transmission. Through the design of the parallel structure, the electric conductor 8 can provide a greater current carrying capacity, ensuring that the cable can still maintain stable operation under high load conditions.

[0065] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-temperature superconducting semi-steel cable, characterized in that: include: An outer sheath layer (1) for protecting the internal structure of the cable; A steel reinforcement layer (2) is arranged on the inner side of the outer sheath layer (1) and is used to increase the mechanical strength of the cable; A low-temperature heat-conducting layer (3) is arranged on the inner side of the steel reinforcement layer (2) and is used to optimize the heat conduction performance of the cable in a low-temperature environment; A shielding layer (4) is arranged on the inner side of the low-temperature thermal conductive layer (3) and is used to isolate electromagnetic interference and ensure stable transmission of the conductive signal; A filling layer (5), located inside the shielding layer (4), is used to fill the internal space of the cable to maintain the structural stability of the cable and prevent the intrusion of foreign substances; The temperature measuring optical fiber (6) is arranged inside the seamless steel pipe (7) and is used to monitor the temperature change inside the cable in real time and accurately obtain the temperature distribution information of the low-temperature superconducting cable through sensing technology; A seamless steel pipe (7) is arranged inside the filling layer (5) and is used to protect the temperature measuring optical fiber (6) from direct damage by the external environment; The electric conductor (8) is arranged inside the filling layer (5) and together with the seamless steel pipe (7) and the temperature measuring optical fiber (6) constitutes the conductive core part of the cable.

2. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: The temperature measuring optical fiber (6) and the electric conductor (8) are arranged independently of each other via a filling layer (5), and the temperature measuring optical fiber (6) and the seamless steel pipe (7) are jointly enclosed in the filling layer (5) to prevent them from being directly exposed to the external environment.

3. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: The material used for the low-temperature heat conductive layer (3) is graphene.

4. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: The steel reinforcement layer (2) is made of stainless steel, and the electric conductor (8) is made of low-temperature superconducting material, which can maintain a superconducting state at an extremely low temperature.

5. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: The material of the outer sheath layer (1) is high-strength polyethylene, and a plurality of low-temperature superconducting cable parallel structures are arranged inside the electric conductor (8).

6. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: The material used for the filling layer (5) is silicone rubber, and the shielding layer (4) adopts a multi-layer structure, wherein the outer shielding layer uses copper-plated aluminum material, and the inner shielding layer uses a tinned copper wire braided mesh.

7. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: The outer surface of the outer jacket layer (1) is provided with a plurality of mounting rings (12), the outer surface of the mounting rings (12) is provided with a plurality of wear-resistant protrusions (13) at equal intervals, and the outer surface of the wear-resistant protrusions (13) is provided with anti-slip stripes.

8. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: The outer surface of the steel reinforcement layer (2) is provided with a plurality of connection strips (10), and the outer surface of the connection strip (10) is fixedly connected with a reinforcement rib (11).

9. A low-temperature superconducting semi-steel cable according to claim 1, characterized in that: A support bar (9) is fixedly connected to the outer surface of the seamless steel pipe (7), and the outer side of the support bar (9) is in contact with the inner wall of the low-temperature heat conductive layer (3).

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