High-temperature-resistant radiation-proof coil structure

Abstract

The utility model discloses a high-temperature-resistant radiation-proof coil structure, which comprises a shell and a binding post, one side of the shell is connected with the binding post, a coil is wound and packaged in the shell and is of a flat structure, an upper reinforcing layer and a lower reinforcing layer are respectively arranged on the upper surface and the lower surface of the inner side of the shell, and an inner reinforcing layer and an outer reinforcing layer are respectively arranged on the inner diameter surface and the outer diameter surface of the inner side of the shell. An upper cavity and a lower cavity which are isolated are reserved in the coils and the shell, transverse reinforcing layers and vertical reinforcing layers are arranged between the coils, the transverse reinforcing layers and the vertical reinforcing layers are arranged in a cross-shaped staggered mode, and a plurality of cavities are formed by the transverse reinforcing layers and the vertical reinforcing layers. The shell is provided with a special coating, the performance is enhanced, the coil is of a flat structure, heat dissipation is facilitated, and the magnetic core is utilized more sufficiently.

Description

Technical Field

[0001] This utility model relates to the field of coil structure technology, and in particular to a high-temperature resistant and radiation-proof coil structure. Background Technology

[0002] Coil structure is a complex and important field. When a three-phase cylindrical induction electromagnetic pump is running, the magnetic field generated by the three-phase winding coil interacts with the induced electromagnetic field on the liquid metal, generating an axial thrust on the liquid metal and driving the medium to flow.

[0003] Electromagnetic pumps used in special applications face stringent requirements, such as size limitations, lack of auxiliary cooling systems, and high-radiation environments.

[0004] To control the size of the electromagnetic pump, the operating current of the coil needs to be increased. This generates significant eddy current losses in the coil, causing it to operate at very high temperatures, often reaching 400°C or even higher. At high temperatures, the copper conductor of the coil oxidizes and crystallizes upon contact with air, leading to a decrease in its conductivity and mechanical properties, thus affecting the pump's delivery performance. The coil's insulation layer typically uses organic materials, which are highly sensitive to temperature and radiation. In high-temperature, high-radiation environments, their lifespan is significantly reduced, impacting safe operation. Therefore, to address the requirements for electromagnetic pump operation in high-temperature, high-radiation environments, a specialized study of the coil structure is necessary.

[0005] In the prior art, patent number CN114420401A discloses an electromagnetic coil for a nuclear power plant control rod drive mechanism, which includes a coil frame, a coil winding, and two terminals. The coil frame includes an inner cylinder made of magnetically shielding material and an outer frame made of magnetically conductive material, and the outer frame is sleeved on the outside of the inner cylinder to form a closed winding space between the radially inner side of the outer frame and the radially outer side of the inner cylinder. The two ends of the coil winding form two leads. Each terminal includes a housing and a pin. Utility Model Content

[0006] The purpose of this invention is to provide a high-temperature resistant and radiation-proof coil structure with better durability, stability, and radiation protection performance.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature resistant and radiation-proof coil structure, comprising a housing and a terminal block, with the terminal block connected to one side of the housing, and the coil wound and encapsulated within the housing, the coil comprising a conductor and an insulating layer, and the coil having a flat structure.

[0008] Preferably, the upper and lower surfaces of the inner side of the housing are respectively provided with an upper reinforcing layer and a lower reinforcing layer.

[0009] Preferably, the inner and outer diameter surfaces of the shell are respectively provided with an inner reinforcing layer and an outer reinforcing layer.

[0010] Preferably, the coil and the housing have an upper chamber and a lower chamber that are isolated from each other.

[0011] Preferably, the upper chamber and the lower chamber are rectangular.

[0012] Preferably, the coils are provided with a horizontal reinforcing layer and a vertical reinforcing layer; the horizontal reinforcing layer and the vertical reinforcing layer are arranged in a cross shape.

[0013] Preferably, the inner gap between the coil and the transverse and vertical reinforcing layers is a fan-shaped structure.

[0014] Preferably, the transverse reinforcing layer and the vertical reinforcing layer form several cavities.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the present utility model has a cross-shaped reinforcing layer inside the coil, which can better dissipate heat; the coil shell of the present utility model has a special coating to enhance performance; the coil of the present utility model adopts a flat structure, which is conducive to heat dissipation and makes fuller use of the magnetic core. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0017] Figure 2 AA is a cross-sectional view of the main structure of this utility model.

[0018] Figure 3 This is a diagram of the internal structure of this utility model.

[0019] In the diagram: 1. Terminal; 2. Housing; 3. Conductor; 4. Insulation layer; 5. Upper chamber; 6. Lower chamber; 7. Upper reinforcing layer; 8. Lower reinforcing layer; 9. Outer reinforcing layer; 10. Inner reinforcing layer; 11. Inner seam; 12. Vertical reinforcing layer; 13. Horizontal reinforcing layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Connection between terminal 1 and housing 2: Terminal 1: As the power input / output part of the coil structure, terminal 1 is made of ceramic material, possessing excellent electrical insulation properties and high-temperature resistance. Housing 2 is the main body of the coil structure, connected to terminal 1 on one side. The design of housing 2 ensures the safe installation and fixation of the coil.

[0022] The coil is wound inside the housing 2, consisting of conductor 3 and insulation layer 4. Conductor 3 is responsible for current transmission, while insulation layer 4 ensures that current does not leak and protects the conductor from external environmental influences.

[0023] This embodiment employs a flat coil structure. This flat coil utilizes space more effectively, reducing the size and weight of the device, which is especially important in space-constrained applications. Due to its planar structure, the flat coil facilitates airflow, improving heat dissipation and thus enhancing the coil's thermal stability and reliability. The flat coil winding method results in tighter and flatter turns, increasing the effective cross-sectional area of ​​the wire and fully utilizing the limited space of the magnetic core. This more efficient core utilization leads to a lower DCR (DC resistance) and reduced copper losses.

[0024] Flat coils can be designed to withstand larger current surges without damage, which is extremely useful in applications requiring high instantaneous current. The flat coil design reduces copper losses, increases the temperature rise current, and improves inductor efficiency. Flat coils using alloy-based metal cores exhibit lower magnetic losses and provide superior saturation current characteristics.

[0025] Flat coils can be directly led out from the pins as solder terminals, completely preventing open circuits. Flat coils are typically wound with special enameled copper wire, offering superior chemical resistance, thermal stability, and radiation resistance. Flat coils can carry higher current densities, a significant advantage for applications requiring high current.

[0026] The reinforcement layers consist of two layers: a horizontal reinforcement layer 12 and a vertical reinforcement layer 13. These two layers are arranged in a cross shape, enhancing the heat dissipation and insulation capabilities of the coil structure. The reinforcement layers help to quickly conduct the heat generated by the coil to the external environment.

[0027] The combination of the horizontal reinforcing layer 12 and the vertical reinforcing layer 13 not only enhances heat dissipation but also forms several enclosed cavities. These cavities help reduce the thermal impact and radiation on the coil.

[0028] When selecting materials for the reinforcing layer between coils, the following materials are included but not limited to: graphite and graphene, carbon fiber composites, ceramic materials, metal matrix composites, etc.; in this embodiment, phlogopite mica can be selected.

[0029] Upper reinforcing layer 7 and lower reinforcing layer 8: These reinforcing layers are located on the upper and lower surfaces of the inner side of the shell 2, respectively, which enhance the structural stability of the shell and improve its heat resistance and insulation.

[0030] Inner reinforcing layer 10 and outer reinforcing layer 9: These reinforcing layers are located on the inner and outer diameter surfaces of the shell, respectively, further enhancing the heat resistance of the shell.

[0031] Upper chamber 5 and lower chamber 6: These chambers are located between the coil and the housing 2, providing additional space for the coil and helping to dissipate heat and maintain the coil.

[0032] Fillers are added to the upper chamber 5 and the lower chamber 6. These fillers can be materials with good thermal conductivity and high heat resistance, such as ceramic fibers, quartz sand, or magnesium oxide.

[0033] Inner seam 11 between the coil and the reinforcing layer: Adding filler to these inner seams helps reduce heat buildup at the seams and also improves the coil's sealing performance.

[0034] Ceramic structure terminal 1: Terminal 1 is made of ceramic material, which has excellent electrical insulation properties and high temperature resistance, making it suitable for use in high temperature and radiation environments.

[0035] The coating on the surface of housing 2: The surface of housing 2 is coated. This coating can further improve the heat resistance and corrosion resistance of the coil, and also help to improve the aesthetics of the coil.

[0036] The design of this high-temperature resistant and radiation-proof coil structure fully considers stability and safety under high-temperature and radiation environments. Through a carefully designed heat dissipation system, reinforcing layers, chambers and fillers, as well as special terminal materials and shell surface treatment, stable operation and long-term durability under high-temperature and radiation environments are achieved.

[0037] The cross-shaped arrangement of the reinforcing layers and the cavity design not only improve heat dissipation efficiency but also enhance the thermal stability of the coil. The reinforcing layers improve the mechanical strength and heat resistance of the shell, ensuring the stability of the coil structure in harsh environments. The design of the cavity and the addition of filler material further improve the coil's heat resistance and radiation protection capabilities. The ceramic structure of the terminals and the plating on the shell surface enhance the coil's electrical insulation performance and corrosion resistance.

[0038] The coils can be designed in a spiral shape to increase the heat dissipation area and improve heat exchange efficiency. Simultaneously, horizontal and vertical reinforcing layers can be placed between the coils, forming a cross-shaped arrangement to further increase the heat dissipation area.

[0039] The reinforcing layer can be designed in a needle-like or corrugated shape to increase the surface area in contact with air, thereby improving convective heat transfer efficiency. Using phlogopite as the material for the reinforcing layer can also improve its insulation properties. The thickness and shape of the reinforcing layer also affect heat dissipation; therefore, the thickness of the reinforcing layer can be controlled.

[0040] Adding fillers, such as thermally conductive ceramic fibers or quartz sand, to the upper chamber 5 and lower chamber 6 can improve heat transfer efficiency. Simultaneously, fillers can also be added to the inner gap between the coil and the reinforcing layer to reduce heat accumulation at the gap.

[0041] Terminal 1 is made of ceramic. Ceramic material has excellent electrical insulation properties and high temperature resistance, making it suitable for use in high-temperature and irradiated environments. A plating layer can be applied to the surface of the housing, which can further improve the heat resistance and corrosion resistance of the coil.

[0042] Heat pipe technology can be used, as heat pipes have extremely high thermal conductivity, which can effectively reduce diffusion thermal resistance and optimize heat dissipation. An electromagnetic field-structure field coupling model is established using software such as ANSYS to numerically simulate and analyze the forming process, studying the influence of electromagnetic forming coil structural parameters on sheet deformation behavior to optimize coil structure design. The surface of the reinforcing layer can be treated with acid-resistant aluminum (alumite) or anodized to increase radiation performance and improve heat dissipation efficiency.

[0043] By combining the above measures, the heat dissipation performance of the coil can be significantly improved, ensuring stable operation of the coil in high-temperature environments.

[0044] Nickel-plated copper wire can be selected as the conductor. The corrosion resistance of nickel-plated copper wire mainly comes from the nickel layer, which forms a dense protective film on the surface of the copper wire. This effectively prevents the copper wire from contacting corrosive media in the environment, thereby extending the coil's lifespan. In high-temperature environments, copper wire easily reacts with oxygen to form copper oxide, which reduces the conductor's conductivity. The nickel plating layer isolates the copper wire from oxygen, reducing oxidation. The high hardness of the nickel layer can also improve the conductor's tensile and compressive strength to a certain extent, making the conductor less prone to breakage or deformation during daily use and installation.

[0045] In this embodiment, the insulation layer uses phlogopite, a material that remains stable at temperatures exceeding 500°C, making it an ideal insulating material for high-temperature environments. Mica possesses excellent electrical insulation properties, effectively preventing current flow and ensuring efficient power transmission. Furthermore, mica's high resistivity and low dielectric loss make it an ideal choice for high-voltage insulation.

[0046] In this embodiment, the reinforcing layer structure is a mica tape, which is made by mixing mica fragments with an adhesive and then hot-pressing it. The mica tape in this embodiment has excellent flexibility and plasticity, allowing it to tightly wrap around the conductor to form a uniform insulating layer. The mica board is made by mixing mica powder with an adhesive and then hot-pressing and curing it. The mica board has high mechanical strength and good temperature resistance, making it suitable as an insulating reinforcing layer for coils.

[0047] This invention employs a specialized mold to ensure that each layer of conductor is evenly wound onto the previous layer during the winding process, thereby achieving precise control over the number of turns and spacing. Using a specialized mold guarantees consistent manufacturing quality for each batch of coils, which is crucial for mass production and quality control. The standardization of the mold also helps reduce errors caused by human operation.

[0048] The spiral structure in this embodiment helps improve the coil's heat dissipation efficiency. In the side-by-side structure, there is a certain gap between each turn of the coil, which facilitates air circulation, thereby carrying heat away from the conductor surface. Current distribution: The spiral side-by-side structure can evenly distribute the current in the coil, reducing hot spots caused by current concentration. This uniform current distribution helps improve the coil's thermal stability and electrical performance.

[0049] Inter-turn insulation impulse testing simulates the voltage surges that a coil might encounter in actual use by applying a momentary high voltage between the coil's turns. This test verifies the stability of the insulation material under high voltage, ensuring that the coil will not break down when encountering voltage fluctuations. This solution, through regular inter-turn insulation impulse testing, can promptly identify potential defects in the insulation material, enabling preventative maintenance and avoiding malfunctions during actual operation.

[0050] The conductor is nickel-plated. Before winding, the copper wire undergoes nickel plating to increase its corrosion and oxidation resistance. This step requires precise control of the plating thickness and uniformity to ensure the conductor's performance.

[0051] During conductor winding, mica tape is evenly wound around the conductor to form a continuous insulating layer. Special attention must be paid to the tension of the mica tape and the tightness of the winding to ensure the integrity and uniformity of the insulation layer.

[0052] After winding and shaping, the coil undergoes a thermosetting process to ensure a tight bond between the insulation and filler materials and the conductor. Thermosetting improves the overall mechanical strength and electrical performance of the coil. At the end of the manufacturing process, the coil undergoes a visual inspection to ensure there are no defects, such as damaged insulation or exposed conductors. The encapsulation within a metal casing is crucial for the coil's moisture protection. This encapsulation strategy effectively isolates the coil from external moisture and humidity, protecting the insulation material from moisture absorption and degradation. The sealing performance of the metal casing is essential to ensuring a dry environment inside the coil, especially in humid or underwater applications.

[0053] The high-temperature stability of nickel-plated copper wire is achieved by plating a layer of nickel onto the surface of the copper wire. This nickel layer not only provides corrosion and oxidation resistance but also slows down the oxidation process of copper in high-temperature environments, maintaining the conductor's conductivity and mechanical properties. This material choice is crucial for the long-term stable operation of the coil in high-temperature environments.

[0054] Filling the coil with magnesium oxide powder and encapsulating it with a metal shell not only provides excellent thermal insulation but also enhances the coil's mechanical stability. This design prevents displacement and deformation of the coil during use, ensuring its electrical performance and physical integrity. Magnesium oxide powder, as an excellent insulating and filling material, has high thermal conductivity and good insulation properties, which contribute to improving the coil's electrical performance.

[0055] The main materials of the coil, including metals and inorganic insulating materials, are carefully selected to withstand high temperatures and radiation. These materials' high-temperature resistance and radiation resistance allow the coil to maintain performance in extreme environments, such as applications in aerospace and nuclear power generation.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-temperature resistant and radiation-proof coil structure, comprising a housing (2) and terminals (1), characterized in that: A terminal block (1) is connected to one side of the housing (2), and a coil is wound and encapsulated inside the housing (2). The coil includes a conductor (3) and an insulating layer (4). The coil has a flat structure. A horizontal reinforcing layer (12) and a vertical reinforcing layer (13) are provided between the coils; the horizontal reinforcing layer (12) and the vertical reinforcing layer (13) are arranged in a cross shape.

2. The high-temperature resistant and radiation-proof coil structure according to claim 1, characterized in that: The inner upper and lower surfaces of the shell (2) are respectively provided with an upper reinforcing layer (7) and a lower reinforcing layer (8).

3. A high-temperature resistant and radiation-proof coil structure according to claim 1 or 2, characterized in that: The inner and outer diameter surfaces of the shell (2) are respectively provided with an inner reinforcing layer (10) and an outer reinforcing layer (9).

4. The high-temperature resistant and radiation-proof coil structure according to claim 1, characterized in that: The coil and the housing (2) have an upper chamber (5) and a lower chamber (6) that are separated from each other.

5. The high-temperature resistant and radiation-proof coil structure according to claim 4, characterized in that: The upper chamber (5) and the lower chamber (6) are rectangular.

6. A high-temperature resistant and radiation-proof coil structure according to claim 1 or 5, characterized in that: The inner seam (11) between the coil and the transverse reinforcing layer (12) and the vertical reinforcing layer (13) is a fan-shaped structure.

7. The high-temperature resistant and radiation-proof coil structure according to claim 6, characterized in that: The horizontal reinforcing layer (12) and the vertical reinforcing layer (13) form several cavities.

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