A high stability high temperature superconducting tube inner conductor

Abstract

The utility model belongs to superconducting pipe technical field, concretely is a kind of high stability high temperature superconducting pipe inner conductor, including sheath and superconducting strand, the inner wall of sheath is fixedly connected with metal framework, the inner chamber of metal framework is cooling channel, several cavities are formed between the inner wall of sheath and metal framework, the inner chamber of cavity is installed with superconducting strand, the surface of sheath is provided with protective layer;Through the structural design of metal framework, the contact area of superconducting strand and cooling channel is increased, to improve the cooling and cooling effect of cooling material in cooling channel to superconducting strand, improve the overall heat dissipation, through the structural design of inner insulation layer, intermediate layer, outer insulation layer and surface layer, sheath has good heat preservation effect, also has higher mechanical strength, critical current density and anti-radiation capacity, improves the overall stability.

Description

Technical Field

[0001] This utility model relates to the field of superconducting technology, specifically a highly stable high-temperature superconducting inner conductor. Background Technology

[0002] Second-generation high-temperature superconducting tapes have broad prospects in high-temperature low-field power transmission and low-temperature high-field magnet applications due to their high critical current density, superior mechanical and electromagnetic properties. High-temperature superconducting conductors require operating currents of several thousand amperes or even tens of thousands of amperes in low-field power transmission applications. Cable conductors inside the tube have advantages such as large current transmission capacity and wide range of applications.

[0003] Existing superconducting inner conductors suffer from poor cooling effects due to insufficient cooling material to adequately cool the superconducting strands, resulting in poor heat dissipation, poor surface insulation and protection, and poor stability. Therefore, a highly stable high-temperature superconducting inner conductor is proposed to address these issues. Utility Model Content

[0004] The technical problem to be solved by this invention is that the existing technology has the disadvantage that the cooling material of the superconducting inner conductor is difficult to cool the superconducting strands sufficiently, resulting in poor cooling effect, poor heat dissipation effect, and poor stability of the superconducting inner conductor. To this end, we propose a high-stability high-temperature superconducting inner conductor.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a high-stability high-temperature superconducting inner conductor, including a sheath and superconducting strands, wherein a metal skeleton is fixedly connected to the inner wall of the sheath, the inner cavity of the metal skeleton is a cooling channel, a plurality of cavities are formed between the inner wall of the sheath and the metal skeleton, superconducting strands are installed in the inner cavity of the cavity, and a protective layer is provided on the surface of the sheath.

[0006] Preferably, the protective layer includes an inner insulation layer, an intermediate layer, an outer insulation layer, and a surface layer. The inner insulation layer is disposed on the surface of the sheath, the intermediate layer is disposed on the surface of the inner insulation layer, the outer insulation layer is disposed on the surface of the intermediate layer, and the surface layer is disposed on the surface of the outer insulation layer.

[0007] Preferably, the inner and outer insulation layers are made of silver-plated polyester film, and the intermediate layer is made of yttrium barium copper oxide coating.

[0008] Preferably, the surface layer is made of hard rubber material, and the metal skeleton is made of stainless steel.

[0009] Preferably, the thickness of the inner and outer insulation layers ranges from 0 to 00 micrometers, and the sheath is made of aluminum.

[0010] Preferably, the cooling channel is hollow and circular.

[0011] The beneficial effects of this utility model are:

[0012] This invention increases the contact area between the superconducting strands and the cooling channel through the structural design of the metal skeleton, thereby improving the cooling effect of the cooling material in the cooling channel on the superconducting strands and improving the overall heat dissipation. Through the structural design of the inner insulation layer, the middle layer, the outer insulation layer and the surface layer, the sheath has a good heat preservation effect, while also having higher mechanical strength, critical current density and radiation resistance, thus improving the overall stability. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a front view of the metal frame structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the sheath structure of this utility model.

[0017] In the diagram: 1. Sheath; 2. Superconducting strands; 3. Metal skeleton; 4. Cooling channel; 5. Cavity; 6. Protective layer; 61. Inner insulation layer; 62. Intermediate layer; 63. Outer insulation layer; 64. Surface layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0020] This application discloses a highly stable high-temperature superconducting inner conductor. (Refer to...) Figure 1 and Figure 2A high-stability, high-temperature superconducting inner conductor includes a sheath 1 and superconducting strands 2. A metal skeleton 3 is fixedly connected to the inner wall of the sheath 1. The inner cavity of the metal skeleton 3 serves as a cooling channel 4. Several cavities 5 are formed between the inner wall of the sheath 1 and the metal skeleton 3. The superconducting strands 2 are installed in the inner cavities 5. A protective layer 6 is provided on the surface of the sheath 1. The cooling channel 4 serves as the main channel for the refrigerant, through which liquid helium, cold helium, or other refrigerants are introduced to reduce flow resistance, increase flow rate, and increase the contact area between the superconducting strands 2 and the cooling channel 4. This improves the cooling effect of the cooling material in the cooling channel 4 on the superconducting strands 2 and enhances the overall heat dissipation. The materials of each layer are existing mature products that can be purchased directly from the market. The connection method between each layer is an existing mature technology, which can be one of spraying, pressing, or braiding. The designed equipment is also existing technology.

[0021] Reference Figure 1 and Figure 3 The protective layer 6 includes an inner insulation layer 61, an intermediate layer 62, an outer insulation layer 63, and a surface layer 64. The inner insulation layer 61 is provided on the surface of the sheath 1, the intermediate layer 62 is provided on the surface of the inner insulation layer 61, the outer insulation layer 63 is provided on the surface of the intermediate layer 62, and the surface layer 64 is provided on the surface of the outer insulation layer 63. It has a good insulation effect and improves the overall stability.

[0022] Reference Figure 3 The inner insulation layer 61 and the outer insulation layer 63 are made of silver-plated polyester film, and the middle layer 62 is made of yttrium barium copper oxide coating. The inner insulation layer 61 and the outer insulation layer 63 have good insulation effect, which improves the insulation effect of the sheath 1. The yttrium barium copper oxide coating has higher mechanical strength, critical current density and radiation resistance, and is suitable for tubular conductors. It has better stability under strong magnetic field and high current.

[0023] Reference Figure 3 The surface layer 64 is made of hard rubber material, and the metal skeleton 3 is made of stainless steel. The surface layer 64 can provide a certain degree of protection for the internal materials, and the stainless steel metal skeleton 3 has high strength and durability, making the whole structure more stable.

[0024] Reference Figure 3 The thickness of the inner insulation layer 61 and the outer insulation layer 63 ranges from 50 to 100 micrometers, and the sheath 1 is made of aluminum material; aluminum material has the advantages of being lightweight and high-strength, and has excellent corrosion resistance.

[0025] Reference Figure 1 and Figure 2 The cooling channel 4 is hollow and circular in shape.

[0026] Working principle: The metal skeleton 3 is installed inside the sheath 1, and the superconducting strand 2 is installed inside the cavity 5. An inner insulation layer 61 is set on the surface of the sheath 1, and an intermediate layer 62 is sprayed on the surface of the inner insulation layer 61. Then, an outer insulation layer 63 is set on the surface of the intermediate layer 62, and a surface layer 64 is set on the surface of the outer insulation layer 63. The cooling material in the cooling channel 4 has a good heat preservation effect on the cooling of the superconducting strand 2, and provides higher mechanical strength, critical current density and radiation resistance.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A highly stable high-temperature superconducting inner conductor, characterized in that: It includes a sheath (1) and superconducting strands (2). The inner wall of the sheath (1) is fixedly connected to a metal skeleton (3). The inner cavity of the metal skeleton (3) is a cooling channel (4). Several cavities (5) are formed between the inner wall of the sheath (1) and the metal skeleton (3). The superconducting strands (2) are installed in the inner cavity of the cavity (5). A protective layer (6) is provided on the surface of the sheath (1). The protective layer (6) includes an inner insulation layer (61), an intermediate layer (62), an outer insulation layer (63), and a surface layer (64). The inner insulation layer (61) is provided on the surface of the sheath (1), the intermediate layer (62) is provided on the surface of the inner insulation layer (61), the outer insulation layer (63) is provided on the surface of the intermediate layer (62), and the surface layer (64) is provided on the surface of the outer insulation layer (63). The inner insulation layer (61) and the outer insulation layer (63) are made of silver-plated polyester film, and the intermediate layer (62) is made of yttrium barium copper oxide coating.

2. The high-stability high-temperature superconducting inner conductor according to claim 1, characterized in that: The surface layer (64) is made of hard rubber material, and the metal skeleton (3) is made of stainless steel.

3. The high-stability high-temperature superconducting inner conductor according to claim 1, characterized in that: The thickness of the inner insulation layer (61) and the outer insulation layer (63) ranges from 50 to 100 micrometers, and the sheath (1) is made of aluminum.

4. The high-stability high-temperature superconducting inner conductor according to claim 1, characterized in that: The cooling channel (4) is hollow and circular in shape.

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