阅读说明：本技术 一种基于多槽结构的高温超导缆线 (High-temperature superconducting cable based on multi-groove structure ) 是由 刘忠林 周立平 于 2021-08-23 设计创作，主要内容包括：本发明公开一种基于多槽结构的高温超导缆线,包括支撑结构,所述支撑结构用于起到电缆支撑的作用；所述支撑结构外表面上沿圆周等间距开设有若干个纵向沟槽,若干个纵向沟槽沿所述支撑结构轴线呈中心对称分布；所述纵向沟槽内安装有超导带；所述支撑结构外表面上绕设有绝缘层,所述绝缘层外表面套设有保护外壳,所述绝缘层与所述保护外壳之间设置有屏蔽层。本发明提供的基于多槽结构的高温超导缆线,结构强度更大、固定效果更好、通流能力更强,克服了目前超导缆线应用中对于扁平形超导带结构设计的技术缺陷。(The invention discloses a high-temperature superconducting cable based on a multi-groove structure, which comprises a supporting structure, wherein the supporting structure is used for supporting a cable; a plurality of longitudinal grooves are formed in the outer surface of the supporting structure at equal intervals along the circumference, and are distributed in a centrosymmetric manner along the axis of the supporting structure; a superconducting tape is arranged in the longitudinal groove; the supporting structure is characterized in that an insulating layer is wound on the outer surface of the supporting structure, a protective shell is sleeved on the outer surface of the insulating layer, and a shielding layer is arranged between the insulating layer and the protective shell. The high-temperature superconducting cable based on the multi-groove structure has the advantages of higher structural strength, better fixing effect and stronger through-flow capacity, and overcomes the technical defect of flat superconducting tape structural design in the application of the conventional superconducting cable.)

1. A high-temperature superconducting cable based on a multi-groove structure is characterized by comprising a supporting structure, a supporting structure and a cable fixing structure, wherein the supporting structure is used for supporting a cable; a plurality of longitudinal grooves (8) are formed in the outer surface of the supporting structure at equal intervals along the circumference, and the longitudinal grooves (8) are distributed along the axis of the supporting structure in a centrosymmetric manner; superconducting tapes (4) are arranged in the longitudinal grooves (8), and the superconducting tapes (4) are arranged along the length direction of the longitudinal grooves (8); the supporting structure is characterized in that an insulating layer (5) is wound on the outer surface of the supporting structure, a protective shell (7) is sleeved on the outer surface of the insulating layer (5), and a shielding layer (6) is arranged between the insulating layer (5) and the protective shell (7).

2. A high-temperature superconducting cable based on a multi-groove structure according to claim 1, characterized in that the supporting structure is a metal skeleton (3), and the metal skeleton (3) can be aluminum bar, copper bar, but not limited to aluminum bar and copper bar.

3. The high-temperature superconducting cable based on the multi-groove structure as claimed in claim 2, wherein a cooling channel (1) is formed in the middle of the metal framework (3), and the cooling channel (1) is a one-way circulation channel.

4. A high-temperature superconducting cable based on a multi-groove structure according to claim 3, wherein a cylindrical pipe (2) is arranged in the metal skeleton (3) between two adjacent longitudinal grooves (8), and the cylindrical pipe (2) is arranged corresponding to the superconducting tapes (4); a plurality of the cylindrical pipelines (2) are distributed along the axis of the metal framework (3) in a centrosymmetric way.

5. A high temperature superconducting cable based on a multi-groove structure according to claim 1, characterized in that the longitudinal groove (8) is rectangular in cross section.

6. A high-temperature superconducting cable based on a multiple-slot structure according to claim 5, wherein the width of the superconducting tape (4) is the same as the depth of the longitudinal groove (8), the longitudinal groove (8) is filled with a metal filling layer, and the superconducting tape (4) is fixed in the longitudinal groove (8) through the metal filling layer.

7. A high-temperature superconducting cable based on a multi-slot structure according to claim 1, wherein the superconducting tapes (4) are made of a second generation high-temperature superconducting material.

8. A high-temperature superconducting cable based on a multi-slot structure according to claim 1, characterized in that the insulating layer (5) is wound with insulating paper having good insulating properties and good mechanical properties at low temperatures.

Technical Field

The invention relates to the technical field of superconducting cables, in particular to a high-temperature superconducting cable based on a multi-groove structure and working in a high-magnetic-field and high-current environment.

Background

In research for applying superconductivity, the design of a superconducting cable structure is receiving more and more attention. Compared with the conventional cable, the high-temperature superconducting cable has the advantages of high current carrying capacity, compact structure, small transmission loss and the like, and has good development potential in the aspect of large-scale power transmission or line capacity expansion under the limitation of corridors, so that the high-temperature superconducting cable has a wide application prospect.

The film epitaxial growth technology is the main mode for producing the second generation high temperature superconducting material at present, and the conductor produced by the mode is that the superconducting material is firstly deposited on a flexible base band and then rolled into a band-shaped structure. At present, several existing technical schemes are to wind the superconducting tapes along a central cylindrical framework for application, or to stack and protect multiple layers of superconducting tapes and then to manufacture cylindrical cable-shaped structures and the like.

Because the thickness of the superconducting layer is limited, the current capacity of a single superconducting tape is limited, the technology of forming a cable by a round cable is mature in cable design, and the problem that how to design a flat superconducting tape and make the flat superconducting tape practically applicable is a prominent problem in the current research process. The invention aims to solve the application problem of the current second-generation high-temperature superconducting tape under high magnetic field and large current, and provides a novel cable structure based on a multi-groove structure.

Disclosure of Invention

The present invention is directed to a high temperature superconducting cable based on a multi-groove structure, which solves the above problems of the prior art.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a high-temperature superconducting cable based on a multi-groove structure, which comprises a supporting structure, wherein the supporting structure is used for supporting a cable; a plurality of longitudinal grooves are formed in the outer surface of the supporting structure at equal intervals along the circumference, and are distributed in a centrosymmetric manner along the axis of the supporting structure; a superconducting tape is arranged in the longitudinal groove and is arranged along the length direction of the longitudinal groove; the supporting structure is characterized in that an insulating layer is wound on the outer surface of the supporting structure, a protective shell is sleeved on the outer surface of the insulating layer, and a shielding layer is arranged between the insulating layer and the protective shell.

Preferably, the support structure is a metal framework, and the metal framework can be an aluminum rod or a copper rod, but is not limited to the aluminum rod and the copper rod.

Preferably, a cooling channel is formed in the middle of the metal framework, and the cooling channel is a one-way circulation channel.

Preferably, a cylindrical pipeline is arranged in the metal framework between two adjacent longitudinal grooves in a penetrating manner, and the cylindrical pipeline is arranged corresponding to the superconducting tapes; and the cylindrical pipelines are distributed along the axis of the metal framework in a centrosymmetric manner.

Preferably, the cross section of the longitudinal groove is rectangular.

Preferably, the width of the superconducting tape is the same as the depth of the longitudinal groove, a metal filling layer is filled in the longitudinal groove, and the superconducting tape is fixed in the longitudinal groove through the metal filling layer.

Preferably, the superconducting tape is made of a second-generation high-temperature superconducting material.

Preferably, the insulating layer is wound by using insulating paper with good insulating property and good mechanical property at low temperature.

The invention discloses the following technical effects: the high-temperature superconducting cable based on the multi-groove structure has the advantages of higher structural strength, better fixing effect and stronger through-flow capacity, and overcomes the technical defect of flat superconducting tape structural design in the application of the conventional superconducting cable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of a structure of a superconducting cable according to the present invention;

fig. 2 is a schematic cross-sectional view of a superconducting cable of the present invention;

FIG. 3 is a schematic structural view of a metal skeleton;

FIG. 4 is a partial schematic view of a metal skeleton according to a second embodiment;

FIG. 5 is a schematic structural diagram of a pressing block in the second embodiment;

the device comprises a cooling channel-1, a cylindrical pipeline-2, a metal framework-3, a superconducting tape-4, an insulating layer-5, a shielding layer-6, a protective shell-7, a longitudinal groove-8, a pressing block-9, a limiting bulge-10, a protruding limiting part-11 and a concave part-12.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example one

The invention provides a high-temperature superconducting cable based on a multi-groove structure, which comprises a metal framework 3, wherein the metal framework 3 is used for supporting a cable; twenty longitudinal grooves 8 are equidistantly formed in the outer surface of the metal framework 3 along the circumference, the cross section of each longitudinal groove 8 is a long and thin rectangle, superconducting tapes 4 are installed in the twenty longitudinal grooves 8, the twenty longitudinal grooves 8 are distributed in a central symmetry mode along the axis of the metal framework 3, an insulating layer 5 is wound on the outer surface of the metal framework 3, the insulating layer 5 is made of insulating paper with good insulating performance and good mechanical performance at low temperature, a protective shell 7 is sleeved on the outer surface of the insulating layer 5 and used for protecting the whole cable structure, the protective shell 7 can be made of non-metal materials, a shielding layer 6 is arranged between the insulating layer 5 and the protective shell 7, the shielding layer 6 is grounded at one end or two ends, a Faraday cage is formed and used for shielding an external electric field of a superconducting cable.

The superconducting tapes 4 are arranged along the length direction of the longitudinal groove 8, the width of the superconducting tapes 4 is the same as the depth of the longitudinal groove 8, the longitudinal groove 8 is filled with soldering tin to form a metal filling layer, the superconducting tapes 4 are fixed in the longitudinal groove 8 through the metal filling layer, and the superconducting tapes 4 are made of second-generation high-temperature superconducting materials, such as YBCO. Each longitudinal groove 8 can accommodate one but not limited to one superconducting tape 4 for transmitting current, and has strong current carrying capacity and small anisotropy due to the central symmetrical distribution of the superconducting tapes 4.

Further, in order to satisfy the demand of in time carrying out cooling to the cable, metal framework 3 adopts the aluminium bar, has seted up cooling channel 1 at the aluminium bar middle part, and cooling channel 1 carries out the cavity to cylindrical aluminium bar middle part and handles, and it is circular but not limited to circular cavity pipeline structure to form the cross-section to add in cavity pipeline inside and be equipped with that heat conductivility is good under the low temperature, the low temperature deformation becomes little, the even copper support pipeline of mechanical stress distribution. The cooling passage 1 is a one-way flow passage, and a refrigerant is injected from one end thereof and flows out from the other end thereof.

In order to improve the cooling effect of the cable, a cylindrical pipeline 2 is arranged in the metal framework 3 between two adjacent longitudinal grooves 8 in a penetrating mode, the cylindrical pipeline 2 is arranged close to the outer end of the metal framework 3, and the cylindrical pipeline 2 is arranged corresponding to the superconducting tape 4; the cylindrical pipelines 2 are distributed along the axis of the metal framework 3 in a centrosymmetric way. Compared with the cooling channel 1, the cylindrical pipeline 2 has a circular cross section with a smaller diameter and is mainly used for balanced cooling, and the pipeline distribution is in a central symmetry mode. But also the mechanical performance of the framework can be increased due to the existence of the cylindrical pipe 2, and the deformation stress generated by cooling can be reduced due to the existence of the cylindrical pipe 2 during cooling.

Example two

The embodiment is different from the first embodiment only in that, in order to facilitate the penetration of the cylindrical pipeline 2, an installation groove is arranged on the outer wall of the metal framework 3 between the two longitudinal grooves 8, a semicircular groove matched with the cylindrical pipeline 2 is arranged at the bottom of the installation groove, when the cylindrical pipeline 2 is penetrated, the cylindrical pipeline 2 is directly placed in the semicircular groove, a pressing block 9 is placed in the installation groove, the pressing block 9 is matched with the installation groove, the bottom end of the pressing block 9 is provided with the semicircular groove matched with the cylindrical pipeline 2, in order to ensure that the pressing block 9 is not easy to separate from the metal framework 3, a limit groove is arranged on the groove wall of the installation groove, a limit bulge 10 is fixed on the side wall of the pressing block 9, the limit bulge 10 is matched with the limit groove, when the pressing block 9 is buckled, the pressing block 9 is pressed, so that the limit bulge 10 on the pressing block 9 is pressed into the limit groove under the action of external force, realize the spacing cooperation between pressfitting piece 9 and metal framework 3 to realize wearing to establish fast of cylindrical pipeline 2. Meanwhile, considering the length problem of the pressing block 9, avoiding the pressing block 9 from being easily deformed due to too long length, and further influencing the connection between the pressing block 9 and the metal framework 3, dividing the pressing block 9 into a plurality of sections, wherein two ends of each section of the pressing block 9 are respectively provided with a protruding limit part 11 and a recessed part 12, the protruding limit parts 11 on two adjacent sections of the pressing block 9 are matched with the recessed parts 12, so that after one section of the pressing block 9 is pressed into the mounting groove on the metal framework 3, the other section of the pressing block 9 is pressed into the mounting groove on the metal framework 3, and then the protruding limit parts 11 on the two sections of the pressing block 9 are inserted into the recessed parts 12 for limiting by sliding one section of the pressing block 9, so that the connection between the sections of the pressing blocks 9 is realized.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.