High-temperature superconducting cable

Abstract

The invention discloses a high-temperature superconducting cable which comprises a framework, a main cooling channel, a plurality of branch cooling channels and a plurality of conductor grooves are formed in the framework, the main cooling channel is formed in the center of the framework and extends in the length direction of the framework, and the branch cooling channels are arranged around the main cooling channel at intervals in the circumferential direction; observed along the cross section of the high-temperature superconducting cable, the branch cooling channels extend in the radial direction of the framework, the radial inner sides of the branch cooling channels communicate with the main cooling channel, the multiple conductor grooves and the multiple branch cooling channels are arranged in a one-to-one correspondence mode, and the conductor grooves comprise symmetrical groove sets. Each symmetrical groove set comprises two single grooves formed in the two circumferential sides of the corresponding branch cooling channel correspondingly. And the plurality of superconductors are respectively assembled in the single grooves. Even if the groove for assembling the superconducting conductor is far away from the main cooling channel in the center, the heat exchange cooling effect can be improved, and the situation that the through-flow capacity is affected due to the fact that heat accumulation occurs and heat cannot be exchanged in time is effectively avoided.

Description

Technical Field

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

[0002] At present, grooves are provided on the skeleton of TSTC high-temperature superconducting cables for assembling superconducting tapes. However, the skeleton of conventional TSTC high-temperature superconducting cables has only one cooling channel in the center. When the superconducting tape near the outside of the skeleton in the groove is far from the cooling channel in the center, it is easy to cause heat accumulation, and the heat cannot be exchanged in time, affecting the flow capacity. Summary of the invention

[0003] The object of the present invention is to provide a high-temperature superconducting cable, which can improve the heat exchange cooling effect even if the groove for assembling the superconducting conductor is far away from the central main cooling channel, and effectively avoid the accumulation of heat and the situation where the flow capacity is affected by the inability to exchange heat in time.

[0004] In order to achieve the above object, the present invention provides a high temperature superconducting cable, comprising:

[0005] A skeleton, wherein a main cooling channel, a plurality of branch cooling channels and a plurality of conductor slots are provided on the skeleton, wherein the main cooling channel is provided at the center of the skeleton and extends along the length direction of the skeleton, wherein the plurality of branch cooling channels are arranged at circumferential intervals around the main cooling channel, wherein when observed along the cross section of the high-temperature superconducting cable, the branch cooling channels extend along the radial direction of the skeleton, and the radial inner sides of the branch cooling channels are connected to the main cooling channel, wherein the plurality of conductor slots are arranged in one-to-one correspondence with the plurality of branch cooling channels, and wherein the conductor slots include a symmetrical slot group, wherein the symmetrical slot group includes two single slots respectively arranged on both sides of the circumference of the branch cooling channel;

[0006] A plurality of superconducting conductors are respectively installed in each of the single slots.

[0007] Preferably, the skeleton is further provided with a plurality of through grooves, and when observed along the cross section of the high-temperature superconducting cable, the plurality of through grooves are arranged one by one on the radial outer sides of the branch cooling channels, the through grooves penetrate the outer peripheral wall of the skeleton, and the radial inner sides of the through grooves are not connected with the corresponding branch cooling channels;

[0008] The superconducting conductor is installed in each of the through grooves.

[0009] Preferably, the through grooves are arranged symmetrically with respect to a reference plane, wherein the reference plane takes the bisector of the cross section of the branch cooling channel corresponding to the through groove along the radial direction of the skeleton as a reference axis, and is formed by extending the reference axis along the length direction of the branch cooling channel.

[0010] Preferably, observing along the cross-section of the high-temperature superconducting cable, the width of the through-groove is greater than the width of the corresponding branch cooling channel, and the radial inner side of the through-groove is separated from the radial outer side of the corresponding branch cooling channel and the radial outer side of the corresponding symmetrical groove group by a partition.

[0011] Preferably, the partition and the frame are integrally formed.

[0012] Preferably, when observed along the cross section of the high-temperature superconducting cable, the conductor slots include a plurality of symmetrical slot groups, and the plurality of symmetrical slot groups are sequentially distributed from outside to inside along the corresponding branch cooling channels.

[0013] Preferably, when observed along the cross section of the high-temperature superconducting cable, the radial inner side of the through slot is separated from the radial outer side of the corresponding branch cooling channel and the radial outer side of the corresponding outermost symmetrical slot group by a partition plate.

[0014] Preferably, the partition and the frame are integrally formed.

[0015] Preferably, the single groove is a spiral groove with the central axis of the main cooling channel as the spiral center line, and the branch cooling channel spirals with the central axis of the main cooling channel as the spiral center line, and the extension direction of the single groove is parallel to the extension direction of the branch cooling channel.

[0016] Preferably, the single groove and the through groove are both spiral grooves with the central axis of the main cooling channel as the spiral center line, and the branch cooling channel spirals with the central axis of the main cooling channel as the spiral center line, and the extension directions of the single groove, the through groove and the branch cooling channel are parallel to each other.

[0017] Compared with the prior art, a high-temperature superconducting cable according to an embodiment of the present invention has the following beneficial effects: since a plurality of branch cooling channels are arranged at circumferential intervals around a main cooling channel, and the radial inner side of the branch cooling channel is connected to the main cooling channel, after a cooling medium is introduced into the main cooling channel, the cooling medium can flow into each branch cooling channel, and two single slots arranged on both sides of the circumference of the branch cooling channel are equipped with superconducting conductors, so that the superconducting conductors in the single slots can exchange heat and cool with the cooling medium in the corresponding branch cooling channel at a closer distance, even if the single slot is far away from the main cooling channel at the center of the skeleton, the heat exchange cooling effect can be improved, and the accumulation of heat and the failure of timely heat exchange to affect the flow capacity are effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the cross-sectional structure of a high-temperature superconducting cable according to an embodiment of the present invention;

[0019] Figure 2is a schematic diagram of the three-dimensional structure of the high-temperature superconducting cable according to an embodiment of the present invention;

[0020] In the figure, 1, skeleton; 2, main cooling channel; 3, branch cooling channel; 4, superconducting conductor; 5, conductor slot; 51, symmetrical slot; 52, single slot; 6, through slot; 7, partition. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances. In addition, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings, for example, the term "upper" may also be used to indicate a certain dependency relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0023] The English abbreviations in the present invention are explained:

[0024] TSTC: Twisted Stacked-Tapes Cable.

[0025] like Figure 1-2 As shown, a high temperature superconducting cable according to an embodiment of the present invention comprises: a skeleton 1 and a plurality of superconducting conductors 4;

[0026] A main cooling channel 2, a plurality of branch cooling channels 3 and a plurality of conductor slots 5 are provided on the skeleton 1. The main cooling channel 2 is provided at the center of the skeleton 1 and extends along the length direction of the skeleton 1. The plurality of branch cooling channels 3 are arranged circumferentially around the main cooling channel 2. When observed along the cross section of the high-temperature superconducting cable, the branch cooling channel 3 extends radially along the skeleton 1, and the radial inner side of the branch cooling channel 3 is connected to the main cooling channel 2. The plurality of conductor slots 5 are arranged one-to-one with the plurality of branch cooling channels 3. The conductor slots 5 include a symmetrical slot group 51, and the symmetrical slot group 51 includes two single slots 52 respectively arranged on both sides of the circumference of the branch cooling channel 3.

[0027] A plurality of superconducting conductors 4 are respectively installed in each single slot 52 .

[0028] It should be noted that since multiple branch cooling channels 3 are arranged at circumferential intervals around the main cooling channel 2, and the radial inner side of the branch cooling channel 3 is connected to the main cooling channel 2, after the cooling medium is introduced into the main cooling channel 2, the cooling medium can flow into each branch cooling channel 3, and the two single slots 52 arranged on both sides of the circumference of the branch cooling channel 3 are equipped with superconducting conductors 4, so that the superconducting conductors 4 in the single slots 52 can be more closely connected to the cooling medium in the corresponding branch cooling channel 3 for heat exchange and cooling. Even if the single slot 52 is far away from the main cooling channel 2 at the center of the skeleton 1, the heat exchange and cooling effect can be improved, effectively avoiding the accumulation of heat and the inability to exchange heat in time, which affects the flow capacity.

[0029] In addition, multiple branch cooling channels 3 are arranged circumferentially around the main cooling channel 2, and multiple conductor slots 5 are arranged one by one corresponding to the multiple branch cooling channels 3, so that the internal structure of the superconducting cable is a concentric coaxial structure. This structure has good shielding performance, can effectively prevent interference and leakage of electromagnetic waves, and ensure the transmission quality and stability of the signal.

[0030] The skeleton 1 is a metal skeleton processed from copper or aluminum rods, and its cross section is circular. The superconducting conductor 4 is formed by stacking multiple superconducting tapes in the thickness direction. The superconducting tapes are made of high-temperature superconducting materials, such as yttrium barium copper oxide, bismuth strontium calcium copper oxide, iron-based superconductors, etc. The current carrying capacity of these materials is much higher than that of traditional copper materials. The outer layer material of the superconducting tape is stainless steel, copper, aluminum and their alloys, which plays a role in protecting the tape. The superconducting tape is preferably 4mm, 3mm or 2mm in width and 100μm in thickness. The critical current of the superconducting conductor 4 can be adjusted by adjusting the number of stacked roots of multiple superconducting tapes. The cross section of the single slot 52 is rectangular, and the width of the single slot 52 is slightly wider than the width of the corresponding assembled superconducting conductor 4, which is convenient for assembly. The height and width of the two single slots 52 of the symmetrical slot group 51 are consistent.

[0031] like Figure 1-2As shown, in a more specific embodiment, the skeleton 1 is further provided with a plurality of through grooves 6. When viewed along the cross section of the high-temperature superconducting cable, the plurality of through grooves 6 are arranged one by one on the radial outer sides of the branch cooling channels 3. The through grooves 6 penetrate the outer peripheral wall of the skeleton 1, and the radial inner sides of the through grooves 6 are not connected to the corresponding branch cooling channels 3.

[0032] A superconducting conductor 4 is mounted in each through slot 6 .

[0033] It should be noted that a plurality of through grooves 6 are arranged one by one on the radially outer side of each branch cooling channel 3, making full use of the space of the skeleton 1. Even if the superconducting conductor 4 installed in the through groove 6 is far away from the main cooling channel 2 at the center of the skeleton 1, the cooling medium can flow from the main cooling channel 2 to the branch cooling channel 3, so that the superconducting conductor 4 in the through groove 6 can be cooled by heat exchange with the cooling medium in the branch cooling channel 3 at a close distance, thereby avoiding heat accumulation there.

[0034] The through slot 6 passes through the outer wall of the skeleton 1, so as to facilitate the assembly of the superconducting conductor 4 into the through slot 6. The through slot 6 is not connected to the corresponding branch cooling channel 3, so as to prevent the cooling medium in the branch cooling channel 3 from directly contacting the superconducting conductor 4 in the through slot 6.

[0035] The height of the through-slot 6 is consistent with the height of the single slot 52, and the width of the through-slot 6 and the width of the single slot 52 can be the same or different, or the through-slot 6 is a plurality of parallel slot bodies, which are equipped with a plurality of parallel superconducting conductors 4, and superconducting conductors 4 with different current carrying capacities can be assembled on the skeleton 1 according to needs.

[0036] Observing along the cross section of the high-temperature superconducting cable, in the radial direction of the skeleton 1, the positions of the through slots 6 and the single slots 52 of the symmetrical slot group 51 are staggered, which effectively reduces the magnetic field strength on the vertical component of the superconducting conductor 4 and improves the current carrying capacity and current density of the superconducting conductor 4.

[0037] like Figure 1-2 As shown, in a more specific embodiment, the through grooves 6 are arranged symmetrically relative to a reference plane, wherein the reference plane takes the bisector of the cross section of the branch cooling channel 3 corresponding to the through grooves 6 along the radial direction of the skeleton 1 as the reference axis, and is formed by extending the reference axis along the length direction of the branch cooling channel 3.

[0038] It should be noted that the through slots 6 are arranged symmetrically with respect to a reference plane, and the reference plane is formed by taking the bisector of the radial direction of the skeleton 1 on the cross section of the branch cooling channel 3 corresponding to the through slot 6 as the reference axis, and extending the reference axis along the length direction of the branch cooling channel 3, so that the through slot 6, the corresponding branch cooling channel 3, and the corresponding symmetrical slot group 51 are coaxial, thereby improving the anti-interference performance and transmission quality of the superconducting cable.

[0039] like Figure 1-2 As shown, in a more specific embodiment, observed along the cross section of the high-temperature superconducting cable, the width of the through slot 6 is greater than the width of the corresponding branch cooling channel 3, and the radial inner side of the through slot 6 is separated from the radial outer side of the corresponding branch cooling channel 3 and the radial outer side of the corresponding symmetrical slot group 51 by a partition 7.

[0040] It should be noted that the width of the through slot 6 is greater than the width of the corresponding branch cooling channel 3. The radial inner side of the through slot 6 is separated from the radial outer side of the corresponding branch cooling channel 3 and the radial outer side of the corresponding symmetrical slot group 51 by a partition 7. The partition 7 can play a role in fault diversion and avoid direct contact between the cooling medium and the superconducting conductor 4.

[0041] The through slot 6 and the symmetrical slot group 51 are close to each other, so that during assembly, the superconducting conductor 4 can be placed into the through slot 6, and then enter the radial outer side of the symmetrical slot group 51 from the radial inner side of the through slot 6, and then assembled into the single slot 52 of the symmetrical slot group 51, and then separated by the partition 7.

[0042] like Figure 1-2 As shown, in a more specific embodiment, observing along the cross section of the high-temperature superconducting cable, the conductor slots 5 include a plurality of symmetrical slot groups 51 , and the plurality of symmetrical slot groups 51 are sequentially distributed from outside to inside along the corresponding branch cooling channels 3 .

[0043] It should be noted that the conductor slot 5 includes a plurality of symmetrical slot groups 51, which are distributed in sequence from the outside to the inside along the corresponding branch cooling channel 3, so that more superconducting conductors 4 can be assembled, and heat exchange and cooling with the cooling medium in the branch cooling channel 3 can also be carried out in close proximity.

[0044] The widths of the single slots 52 of the plurality of symmetrical slot groups 51 can be the same or different, so that they can be adjusted to fit the structure of the frame 1, and can be equipped with superconducting conductors 4 with different current carrying capacities. The heights of the single slots 52 of each symmetrical slot group 51 are consistent, and two symmetrical slot groups 51 adjacent to each other in the radial direction of the frame 1 are not connected.

[0045] like Figure 1-2 As shown, in a more specific embodiment, observed along the cross section of the high-temperature superconducting cable, the radial inner side of the through slot 6 and the radial outer side of the corresponding branch cooling channel 3 and the radial outer side of the corresponding outermost symmetrical slot group 51 are separated by a partition 7.

[0046] It should be noted that when the conductor slot 5 includes a plurality of symmetrical slot groups 51, the bottom of the through slot 6 and the top of the corresponding outermost symmetrical slot group 51 are separated by a partition 7. Two symmetrical slot groups 51 adjacent to each other in the radial direction of the frame 1 may also be separated by a partition.

[0047] like Figure 1-2As shown, in a more specific embodiment, the partition 7 and the frame 1 are integrally formed.

[0048] It should be noted that the partition 7 and the frame 1 are integrally formed, which helps to improve the overall mechanical stability and heat conduction efficiency of the superconducting cable. The material of the partition 7 is not limited to copper and aluminum, but can be other low-resistance, high-hardness conductor materials, which can play an effective role in fault diversion.

[0049] like Figure 1-2 As shown, in a more specific embodiment, the single groove 52 is a spiral groove with the central axis of the main cooling channel 2 as the spiral center line, and the branch cooling channel 3 spirals with the central axis of the main cooling channel 2 as the spiral center line, and the extension direction of the single groove 52 is parallel to the extension direction of the branch cooling channel 3.

[0050] It should be noted that the single groove 52 is a spiral groove with the central axis of the main cooling channel 2 as the spiral center line, and the branch cooling channel 3 also spirals with the central axis of the main cooling channel 2 as the spiral center line. The extension direction of the single groove 52 and the extension direction of the branch cooling channel 3 are always parallel, the structure is more stable, and the superconducting conductor 4 assembled in the single groove 52 is at the same distance from the branch cooling channel 3 at various places along the length direction.

[0051] like Figure 1-2 As shown, in a more specific embodiment, the single groove 52 and the through groove 6 are both spiral grooves with the central axis of the main cooling channel 2 as the spiral center line, and the branch cooling channel 3 spirals with the central axis of the main cooling channel 2 as the spiral center line, and the extension directions of the single groove 52, the through groove 6 and the branch cooling channel 3 are parallel to each other.

[0052] It should be noted that the single slot 52 and the through slot 6 are both spiral slots with the central axis of the main cooling channel 2 as the spiral center line, and the branch cooling channel 3 spirals with the central axis of the main cooling channel 2 as the spiral center line. The extension directions of the single slot 52, the through slot 6 and the branch cooling channel 3 are parallel to each other. Therefore, the superconducting conductor 4 assembled in the through slot 6 and the superconducting conductor 4 assembled in the single slot 52 have the same twisting angle, which can reduce the mutual crosstalk and external interference between the wire groups.

[0053] The working process of the present invention is as follows: after the cooling medium is introduced into the main cooling channel 2, the cooling medium can flow into each branch cooling channel 3, and the superconducting conductor 4 is assembled in two single grooves 52 arranged on both sides of the circumference of the branch cooling channel 3, so that the superconducting conductor 4 in the single groove 52 can be closer to the cooling medium in the corresponding branch cooling channel 3 for heat exchange and cooling.

[0054] In summary, the embodiments of the present invention provide a high-temperature superconducting cable, which can improve the heat exchange cooling effect even if the groove for assembling the superconducting conductor is far away from the central main cooling channel, and effectively avoid the accumulation of heat and the situation where the flow capacity is affected by the inability to exchange heat in time.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A high temperature superconducting cable, characterized in that: include: A skeleton, wherein a main cooling channel, a plurality of branch cooling channels and a plurality of conductor slots are provided on the skeleton, wherein the main cooling channel is provided at the center of the skeleton and extends along the length direction of the skeleton, wherein the plurality of branch cooling channels are arranged at circumferential intervals around the main cooling channel, wherein when observed along the cross section of the high-temperature superconducting cable, the branch cooling channels extend along the radial direction of the skeleton, and the radial inner sides of the branch cooling channels are connected to the main cooling channel, wherein the plurality of conductor slots are arranged in one-to-one correspondence with the plurality of branch cooling channels, and wherein the conductor slots include a symmetrical slot group, wherein the symmetrical slot group includes two single slots respectively arranged on both sides of the circumference of the branch cooling channel; A plurality of superconducting conductors are respectively installed in each of the single slots.

2. The high temperature superconducting cable according to claim 1, characterized in that: The frame is also provided with a plurality of through grooves. When observed along the cross section of the high-temperature superconducting cable, the plurality of through grooves are arranged one by one on the radial outer sides of the branch cooling channels. The through grooves penetrate the outer peripheral wall of the frame, and the radial inner sides of the through grooves are not connected to the corresponding branch cooling channels. The superconducting conductor is installed in each of the through grooves.

3. The high temperature superconducting cable according to claim 2, characterized in that: The through grooves are arranged symmetrically with respect to a reference plane, wherein the reference plane takes the bisector of the cross section of the branch cooling channel corresponding to the through groove along the radial direction of the skeleton as a reference axis, and is formed by extending the reference axis along the length direction of the branch cooling channel.

4. The high temperature superconducting cable according to claim 3, characterized in that: Observing along the cross section of the high-temperature superconducting cable, the width of the through groove is greater than the width of the corresponding branch cooling channel, and the radial inner side of the through groove is separated from the radial outer side of the corresponding branch cooling channel and the radial outer side of the corresponding symmetrical groove group by a partition.

5. The high temperature superconducting cable according to claim 4, characterized in that: The partition plate and the frame are integrally formed.

6. The high temperature superconducting cable according to claim 4, characterized in that: Observing along the cross section of the high-temperature superconducting cable, the conductor slots include a plurality of symmetrical slot groups, and the plurality of symmetrical slot groups are sequentially distributed from outside to inside along the corresponding branch cooling channels.

7. The high temperature superconducting cable according to claim 6, characterized in that: Observing along the cross section of the high-temperature superconducting cable, the radial inner side of the through slot is separated from the radial outer side of the corresponding branch cooling channel and the radial outer side of the corresponding outermost symmetrical slot group by a partition plate.

8. The high temperature superconducting cable according to claim 7, characterized in that: The partition plate and the frame are integrally formed.

9. The high temperature superconducting cable according to claim 1, characterized in that: The single groove is a spiral groove with the central axis of the main cooling channel as the spiral center line, and the branch cooling channel spirals with the central axis of the main cooling channel as the spiral center line. The extension direction of the single groove is parallel to the extension direction of the branch cooling channel.

10. The high temperature superconducting cable according to claim 2, characterized in that: The single groove and the through groove are both spiral grooves with the central axis of the main cooling channel as the spiral center line, and the branch cooling channel spirals with the central axis of the main cooling channel as the spiral center line. The extension directions of the single groove, the through groove and the branch cooling channel are parallel to each other.

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