CN110570989A - superconducting cable - Google Patents

Abstract

The present application relates to a superconducting cable. The superconducting cable includes a cable skeleton, a first insulating layer and a superconducting layer. The first insulating layer is formed on the surface of the cable bobbin away from its axis. The superconducting layer is wound on the surface of the first insulating layer away from the cable skeleton, and the superconducting layer includes at least two superconducting tapes and reinforcing components, wherein a welding joint is formed at the connection of each adjacent two superconducting tapes, and the reinforcing The component is arranged on the welded joint, and the reinforcing component is used to reinforce the welded joint. The superconducting cable includes a cable skeleton, a first insulating layer and a superconducting layer. The first insulating layer is formed on the surface of the cable skeleton away from its axis, and the superconducting layer is wound on the surface of the first insulating layer away from the cable skeleton. By arranging the reinforcing component at the welding joint, the welding joint of the superconducting tape can be prevented from being lifted during the process of winding the superconducting layer, thereby ensuring the stability of the electric power transmission of the superconducting layer.

Description

superconducting cable

technical field

The present application relates to the field of power transmission technology, in particular to a superconducting cable.

Background technique

High-temperature superconducting tapes have the advantages of zero resistance, high critical current density, and low power loss when transporting large currents in the superconducting state, so they have broad application prospects in the field of power transmission.

In superconducting cables, due to the limited length of each superconducting tape, multiple superconducting tapes need to be welded together by soldering and then formed on the cable skeleton. However, during the winding process of the superconducting tape, the bending of the welding place of the superconducting tape may cause the welding position to lift up, resulting in the ineffective transmission of electrical energy between two adjacent superconducting tapes.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a superconducting cable in order to solve the problem of warping at the welding point of two adjacent superconducting tapes when winding superconducting tapes.

The application provides a superconducting cable, including:

cable skeleton;

a first insulating layer formed on the surface of the cable bobbin away from its axis; and

A superconducting layer, wound on the surface of the first insulating layer away from the cable skeleton, the superconducting layer comprising at least two superconducting tapes and reinforcing components, wherein every two adjacent superconducting tapes A welded joint is formed at the connection of the welded joint, and the reinforcing component is arranged on the welded joint, and the reinforcing component is used to strengthen the welded joint.

In one of the embodiments, the superconducting layer includes a first superconducting layer, a second superconducting layer and a third superconducting layer, the first superconducting layer, the second superconducting layer and the third superconducting layer The three superconducting layers are wound on the surface of the first insulating layer away from the cable skeleton in turn, and respectively include at least two superconducting tapes and reinforcing components, and the connection between each adjacent two superconducting tapes is The welded joint is formed, and the reinforcing component is disposed on the welded joint, and the reinforcing component is used for reinforcing the welded joint.

In one embodiment, the superconducting layer further includes two second insulating layers, which are respectively sandwiched between the first superconducting layer and the second superconducting layer, and the second superconducting layer and the third superconducting layer.

In one of the embodiments, the reinforcing assembly includes two flexible reinforcing plates, and the two flexible reinforcing plates respectively cover the two surfaces of the welded joint parallel to the extending direction of the superconducting tape, and are used for reinforcing the welding joint. The welded joints are reinforced.

In one of the embodiments,

The width of the two flexible reinforcing plates is greater than the width of the superconducting tape, wherein the width of the two flexible reinforcing plates is that the two flexible reinforcing plates are parallel to the surface of the superconducting tape and perpendicular to the surface of the superconducting tape. the length in the extending direction of the superconducting tape;

The reinforcing assembly further includes fasteners, the fasteners are arranged at both ends of the two flexible reinforcing plates along the width direction thereof, and are located at the positions where the two flexible reinforcing plates extend beyond the superconducting tapes , the fastener is used to fix the two flexible reinforcing plates.

In one embodiment, the fastener is a strip-and-groove-type clamp.

In one embodiment, both ends of the flexible reinforcing plate along the width direction thereof are provided with a plurality of first through holes, and the fasteners are respectively penetrated through the plurality of first through holes.

In one of the embodiments, the reinforcement assembly includes fasteners, and the fasteners are disposed on two sides of the welded joint that are parallel to the surface of the superconducting tape and perpendicular to the extending direction of the superconducting tape. end, the fastener is used to reinforce the welded joint.

In one embodiment, a plurality of second through holes are opened at both ends of the welded joint parallel to the surface of the superconducting tape and perpendicular to the extending direction of the superconducting tape, and the fasteners are respectively passing through the plurality of second through holes.

In one of the embodiments, the material of the reinforcing component is metal.

In one embodiment, the superconducting cable further includes a third insulating layer and a shielding layer, wherein the third insulating layer is formed on a surface of the superconducting layer away from the first insulating layer, and the shielding layer is A layer is formed on a surface of the third insulating layer away from the superconducting layer.

The superconducting cable includes a cable skeleton, a first insulating layer and a superconducting layer. The first insulating layer is formed on the surface of the cable skeleton away from its axis, and the superconducting layer is wound on the surface of the first insulating layer away from the cable skeleton. By arranging reinforcing components at the welding joints of two adjacent superconducting tapes used for winding the superconducting layer, the welding joints of the superconducting tapes can be prevented from being lifted during the superconducting layer winding process, thereby ensuring that Stability of electrical energy transport in superconducting layers.

Description of drawings

1 is a schematic structural diagram of a superconducting cable provided in an embodiment of the application;

2 is a schematic structural diagram of another superconducting cable provided in an embodiment of the present application;

3 is a schematic cross-sectional structural diagram of a superconducting tape reinforced by a reinforcing component at the welding joint position of a superconducting tape provided in an embodiment of the present application;

FIG. 4 is a schematic cross-sectional structural diagram of another superconducting tape provided in an embodiment of the present application where the welding joint position is reinforced by a reinforcing component;

FIG. 5 is a schematic cross-sectional structural diagram of yet another superconducting tape where the welding joint position is reinforced by a reinforcing component according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of still another superconducting cable according to an embodiment of the present application.

Explanation of reference numerals

100 superconducting cables

10 Cable bobbins

20 First insulating layer

30 superconducting layers

310 Superconducting tape

311 first through hole

312 second through hole

320 Reinforcement Kit

321 Flexible stiffener

322 Fasteners

330 Welded Joints

340 first superconducting layer

350 second superconducting layer

360 The third superconducting layer

40 Second insulating layer

50 Third insulating layer

60 Shield

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are for the purpose of describing specific embodiments only, and are not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 , the present application provides a superconducting cable 100 . The superconducting cable 100 includes a cable bobbin 10 , a first insulating layer 20 and a superconducting layer 30 . The first insulating layer 20 is formed on the surface of the cable bobbin 10 away from its axis. The superconducting layer 30 is wound on the surface of the first insulating layer 20 away from the cable skeleton 10 . The superconducting layer 30 includes at least two superconducting tapes 310 and reinforcing components 320 , wherein a welding joint 330 is formed at the connection of each adjacent two superconducting tapes 310 , and the reinforcing components 320 are arranged at the welding joints 330 , and the reinforcing components 320 Used to reinforce the welded joint 330 .

It is understood that the superconducting cable 100 may include a cable skeleton 10 , a first insulating layer 20 and a superconducting layer 30 . The cable skeleton 10 may hold the superconducting layer 30 in a predetermined shape, and the cable skeleton 10 may be a flexible tubular structure, such as a metal corrugated tube. In addition, the inside of the cable bobbin 10 can also serve as a flow channel for the cooling medium. The first insulating layer 20 may be formed by winding insulating paper on the outer surface of the cable bobbin 10 , and in one embodiment, the insulating paper may be polypropylene laminated paper. It can be understood that between the first insulating layer 20 and the superconducting layer 30, a semiconductor layer can also be formed, and the semiconductor layer can handle the local electric field distortion caused by the irregularity of the conductor properties.

In this embodiment, the superconducting layer 30 is formed by winding the superconducting tape 310 on the surface of the first insulating layer 20 away from the cable skeleton 10 . However, in the actual manufacturing process of the superconducting cable 100, due to the limited length of the superconducting tape 310, when winding the superconducting layer 30, a plurality of superconducting tapes 310 are usually welded together to meet the requirements of the superconducting cable 100. length requirements.

It can be understood that the welding process of the superconducting strips 310 is as follows: removing the protective layers of the two superconducting strips 310 , uniformly coating the surface of the superconducting strips 310 with low-temperature solder, and aligning the welding sections of the two superconducting strips 310 , the temperature is lowered after applying pressure to the welding section, that is, the welding of the two superconducting strips 310 is realized. In this embodiment, the superconducting tape 310 may be a YBCO high temperature superconducting tape. It should be noted that the YBCO high-temperature superconducting tape is prepared on a metal base tape and has a layered structure, which leads to the asymmetric cross-section of the tape. If the side of the YBCO high temperature superconducting tape close to the superconducting layer is recorded as "face", and the side close to the metal base tape is recorded as "back". In the welding process, face-to-face welding can be used, and the welding resistance is the smallest at this time. However, since the limit bending radius of the welded joints 330 formed by every two adjacent superconducting tapes 310 is generally smaller than the limit bending radius of the superconducting tapes 310 , during the winding process of the superconducting layer 30 , the welding joints 330 have Bending may cause the welding section of the two superconducting strips 310, that is, the solder of the welding joint 330 to fall off, thereby causing the superconducting strips 310 at the position of the welding joint 330 to be lifted, resulting in two adjacent superconducting strips 310. Power cannot be efficiently transferred between them.

The superconducting cable 100 includes a cable skeleton 10 , a first insulating layer 20 and a superconducting layer 30 . The first insulating layer 20 is formed on the surface of the cable skeleton 10 away from the axis thereof, and the superconducting layer 30 is wound on the surface of the first insulating layer 20 away from the cable skeleton 10 . By disposing the reinforcement assembly 320 at the welding joints 330 of two adjacent superconducting tapes 310 for winding the superconducting layer 30 , the welding joints 330 of the superconducting tapes 310 can be prevented from being wound in the process of winding the superconducting layer 30 . The middle is lifted, thereby ensuring the stability of the power transmission of the superconducting layer 30 .

It can be understood that the present application does not limit the specific shape and material of the reinforcing component 320, as long as it can reinforce the position of the welding joint 330 of the superconducting tape 310. In one of the embodiments, the material of the reinforcement assembly 320 is metal. The reinforcing member 320 of metal material has high stability of mechanical strength, which can ensure that the solder at the welding joint 330 will not fall off due to insufficient bending radius, thereby further improving the service life of the superconducting cable 100 .

Please refer to FIG. 2 together. In one embodiment, the superconducting layer 30 includes a first superconducting layer 340 , a second superconducting layer 350 and a third superconducting layer 360 . The first superconducting layer 340 and the second superconducting layer 340 The conductive layer 350 and the third superconducting layer 360 are wound on the surface of the first insulating layer 20 away from the cable skeleton 10 in turn, and respectively include at least two superconducting tapes 310 and reinforcing components 320, each adjacent two superconducting tapes. A welded joint 330 is formed at the connection of the materials 310 , and a reinforcing component 320 is disposed on the welded joint 330 , and the reinforcing component 320 is used to reinforce the welded joint 330 . It can be understood that when the superconducting cable 100 is a three-phase coaxial superconducting cable, the three-phase superconducting layers are wound on the surface of the first insulating layer 20 away from the cable skeleton 10 in turn. In the present embodiment, reinforcement components 320 may be disposed at the welding joints 330 of two adjacent superconducting tapes 310 in the first superconducting layer 340 , the second superconducting layer 350 and the third superconducting layer 360 respectively. , which can ensure the stability of the power transmission of each superconducting layer in the process of winding the first superconducting layer 340, the second superconducting layer 350 and the third superconducting layer 360 respectively, and ensure that the superconducting cable 100 can effectively transmit electrical energy.

In one of the embodiments, the superconducting layer 30 further includes two second insulating layers 40 sandwiched between the first superconducting layer 340 and the second superconducting layer 350, the second superconducting layer 350 and the third superconducting layer 40, respectively. between the superconducting layers 360 . It can be understood that the second insulating layer 40 can provide interphase insulation for the superconducting layer 30 . In one embodiment, the material of the second insulating layer 40 may be insulating paper.

In one of the embodiments, the reinforcing assembly 320 includes two flexible reinforcing plates 321 , and the two flexible reinforcing plates 321 respectively cover the two surfaces of the welding joint 330 parallel to the extending direction of the superconducting tape 310 , and are used for strengthening the welding joint 330 . reinforcement. It can be understood that the present application does not limit the materials of the two flexible reinforcing plates 321 , as long as they can reinforce the welding joint 330 without affecting the properties of the superconducting cable 100 . In one embodiment, the two flexible reinforcing plates 321 may be thin metal plates, and the shapes of the two flexible reinforcing plates 321 are rectangles. It can be understood that the width of the rectangular flexible reinforcing plate 321 may be greater than or equal to the width of the superconducting tape 310 , and the length of the flexible reinforcing plate 321 may be greater than the length of the welding joint 330 along the extending direction of the superconducting tape 310 . At this time, the two flexible reinforcing plates 321 can be respectively disposed on the upper and lower surfaces of the welding joint 330. During the process of winding the superconducting layer 30, the two flexible reinforcing plates 321 can be bent along with the bending of the welding joint 330, and Continuously applying pressure to the welded joint 330 completes the reinforcement of the welded joint 330 .

Please refer to FIG. 3 together. In one embodiment, the width of the two flexible reinforcing plates 321 is greater than the width of the superconducting tape 310 , wherein the width of the two flexible reinforcing plates 321 is that the two flexible reinforcing plates 321 are parallel to the superconducting strips 321 . The length of the surface of the conductive tape 310 and perpendicular to the extending direction of the superconducting tape 310 . The reinforcement assembly 320 further includes fasteners 322, which are arranged at both ends of the two flexible reinforcement plates 321 along the width direction thereof, and are located at the positions where the two flexible reinforcement plates 321 extend beyond the superconducting tape 310. The fasteners 322 is used to fix the two flexible reinforcing plates 321 . In one embodiment, both ends of the flexible reinforcing plate 321 along the width direction thereof are provided with a plurality of first through holes 311 , and the fasteners 322 are respectively penetrated through the plurality of first through holes 311 . It can be understood that the width of the two flexible reinforcing plates 321 is greater than the width of the superconducting tape 310 . Fasteners 322 are provided on the part of the two flexible reinforcing plates 321 extending beyond the superconducting tape 310 in the width direction, so that the two flexible reinforcing plates 321 can be fixed together. In one embodiment, the fasteners 322 may be rivets. The provision of the fasteners 322 can further enhance the reinforcement effect of the reinforcement assembly 320 on the welded joint 330 .

Referring to FIG. 4 together, in one embodiment, the fastener 322 is a strip-shaped groove-type clamp. It will be appreciated that the fasteners 322 may be grooved clamps. It can be understood that the present application does not specifically limit the fixing method between the fastener 322 and the flexible reinforcing plate 321, as long as a stable connection between the two can be achieved during bending. In one embodiment, the fastener 322 may be provided with a protrusion, and the flexible reinforcing plate 321 may be provided with a fixing groove matching the protrusion, and the fastener 322 and the flexible reinforcing plate 32 may pass through the protrusion and the fixing groove. Fix it together. It can be understood that the length of the strip fastener 322 may be greater than or equal to the length of the flexible reinforcing plate 321 along the extending direction of the superconducting tape 310 , so as to ensure that the fastener 322 can fix the two flexible reinforcing plates 321 .

Please also refer to FIG. 5 , in one embodiment, the reinforcing member 320 includes a fastener 322 , and the fastener 322 is disposed on the welded joint 330 parallel to the surface of the superconducting tape 310 and extending perpendicular to the superconducting tape 310 At both ends of the direction, fasteners 322 are used to reinforce the welded joint 330 . In one embodiment, a plurality of second through holes 312 are opened at both ends of the welding joint 330 parallel to the surface of the superconducting tape 310 and perpendicular to the extending direction of the superconducting tape 310 , and the fasteners 322 are respectively penetrated through A plurality of second through holes 312 .

It is understood that the superconducting tape 310 generally includes a substrate, a buffer layer, a superconducting layer and a protective layer. Wherein, the substrate can provide a carrier for the superconducting layer. The buffer layer is used to provide a texture base for the superconducting layer, which can block atomic diffusion between the substrate and the superconducting layer. The protective layer can protect the superconducting layer and conduct overcurrent. In the superconducting tape 310, the width of the superconducting layer is generally smaller than that of the other layers, that is, the width of the protective layer may be larger than that of the superconducting layer. Therefore, by opening the second through holes 312 at both ends of the protective layer of the superconducting tape 310 beyond the superconducting layer in the welding joint 330, and disposing the fasteners 322 in the second through holes 312, the butt welding joint can be realized. 330 reinforcement. In one embodiment, the fasteners 322 may be rivets.

Please refer to FIG. 6 together, in one embodiment, the superconducting cable 100 further includes a third insulating layer 50 and a shielding layer 60 , wherein the third insulating layer 50 is formed on the surface of the superconducting layer 30 away from the first insulating layer 20 , and the shielding layer 60 is formed on the surface of the third insulating layer 50 away from the superconducting layer 30 . It can be understood that the shielding layer 60 is formed on the outer side of the third insulating layer 50 . When the shielding layer 60 is provided, the magnetic field of the alternating current flowing through the superconducting layer 30 can be prevented from leaking out of the superconducting cable 100 . The shielding layer 60 may be formed of a conductive material. In one of the embodiments, a copper shielding layer may be formed by winding a copper tape on the outside of the third insulating layer 50 . It can be understood that a protective layer can be formed on the outer side of the shielding layer 60 , the protective layer can cover the shielding layer 60 , and can provide mechanical protection for the shielding layer 60 . In one of the embodiments, a polypropylene laminate paper may be used to wrap a protective layer on the surface of the shielding layer 60 away from the third insulating layer 50 .

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (11)

1. a superconducting cable, is characterized in that, comprises: cable skeleton (10); a first insulating layer (20) formed on the surface of the cable bobbin (10) away from its axis; and A superconducting layer (30) wound on the surface of the first insulating layer (20) away from the cable skeleton (10), the superconducting layer (30) comprising at least two superconducting tapes (310) and A reinforcement assembly (320), wherein a welding joint (330) is formed at the connection of every two adjacent superconducting tapes (310), and the reinforcement assembly (320) is arranged on the welded joint (330), so The reinforcing assembly (320) is used for reinforcing the welded joint (330). 2. The superconducting cable according to claim 1, wherein the superconducting layer (30) comprises a first superconducting layer (340), a second superconducting layer (350) and a third superconducting layer ( 360), the first superconducting layer (340), the second superconducting layer (350) and the third superconducting layer (360) are sequentially wound around the first insulating layer (20) away from all the surface of the cable skeleton (10), and respectively include at least two superconducting tapes (310) and reinforcing components (320), and the welding is formed at the connection of each adjacent two superconducting tapes (310). A joint (330) is provided, and the reinforcing component (320) is disposed on the welded joint (330), and the reinforcing component (320) is used to reinforce the welded joint (330). 3. The superconducting cable according to claim 2, wherein the superconducting layer (30) further comprises two second insulating layers (40), which are respectively sandwiched between the first superconducting layer (340) ) and the second superconducting layer (350), and between the second superconducting layer (350) and the third superconducting layer (360). 4. The superconducting cable according to any one of claims 1-3, characterized in that the reinforcing assembly (320) comprises two flexible reinforcing plates (321), and the two flexible reinforcing plates (321) The two surfaces of the welded joint (330) parallel to the extending direction of the superconducting tape (310) are respectively covered, so as to reinforce the welded joint (330). 5. The superconducting cable according to claim 4, characterized in that, The width of the two flexible reinforcing plates (321) is greater than the width of the superconducting tape (310), wherein the width of the two flexible reinforcing plates (321) is such that the two flexible reinforcing plates (321) are parallel a length on the surface of the superconducting tape (310) and perpendicular to the extending direction of the superconducting tape (310); The reinforcement assembly (320) further includes fasteners (322), the fasteners (322) are arranged at both ends of the two flexible reinforcement plates (321) in the width direction thereof, and are located at the two flexible reinforcement plates (321) The position of the flexible reinforcing plate (321) beyond the superconducting tape (310), and the fastener (322) is used to fix the two flexible reinforcing plates (321). 6. The superconducting cable according to claim 5, characterized in that, the fastener (322) is a strip-shaped groove-type clamp. 7. The superconducting cable according to claim 5, characterized in that, both ends of the flexible reinforcing plate (321) along the width direction thereof are provided with a plurality of first through holes (311), and the fasteners (322) are respectively penetrated through the plurality of first through holes (311). 8. The superconducting cable according to any one of claims 1-3, wherein the reinforcing assembly (320) comprises a fastener (322), and the fastener (322) is arranged on the Welding joints (330) are parallel to the surface of the superconducting tape (310) and are perpendicular to both ends of the extending direction of the superconducting tape (310), and the fasteners (322) are used for the welding Joints (330) are reinforced. 9. The superconducting cable according to claim 8, characterized in that the welded joint (330) extends parallel to the surface of the superconducting tape (310) and perpendicular to the superconducting tape (310) Both ends of the direction are provided with a plurality of second through holes (312), and the fasteners (322) are respectively penetrated through the plurality of second through holes (312). 10. The superconducting cable according to claim 1, characterized in that, the material of the reinforcing component (320) is metal. 11. The superconducting cable according to claim 1, further comprising a third insulating layer (50) and a shielding layer (60), wherein the third insulating layer (50) is formed on the superconducting layer (30) A surface away from the first insulating layer (20), and the shielding layer (60) is formed on a surface of the third insulating layer (50) away from the superconducting layer (30).