High temperature superconducting cable core connecting device and connecting method

Abstract

The application discloses a high-temperature superconducting cable core connecting device and a connecting method, wherein the connecting device comprises: a first connecting conduit sleeved on twisted copper conductors of two high-temperature superconducting cable cores; a first tin blocking cover screwed on the first connecting conduit; two half tile covers mutually blocked and mounted on the first connecting conduit; a first wrapped semi-conductive tape tightly wrapped with a second wrapped semi-conductive tape; a first wrapped insulation tape tightly wrapped with a second wrapped insulation tape; a third wrapped semi-conductive tape tightly wrapped with a fourth wrapped semi-conductive tape; a second connecting conduit sleeved on the third wrapped semi-conductive tape; a second tin blocking cover sleeved on the second connecting conduit; and a third wrapped insulation tape connected with a fourth wrapped insulation tape respectively. The application has simple and light structure, low cost, and can realize connection and extension of multiple high-temperature superconducting cables.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, specifically relating to a high-temperature superconducting cable core connection device and connection method. Background Technology

[0002] High-temperature superconducting cables produced using second-generation high-temperature superconducting tapes are structurally based on their function, primarily consisting of a Dewar tube housing a high-temperature superconducting cable core. This core can be either single-core or three-core. Due to limitations in production and transportation, it is impossible to produce high-temperature superconducting cables of infinite length. Therefore, when constructing long high-temperature superconducting cable lines, a superconducting cable core conductor connecting device is needed to connect segments of the cable to achieve the required line length. However, such a connecting device does not currently exist. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a high-temperature superconducting cable core connection device and connection method to realize the connection and extension of multiple high-temperature superconducting cables and meet the construction needs of high-temperature superconducting cable lines.

[0004] To solve the above-mentioned technical problems, the present invention provides a high-temperature superconducting cable core connection device for connecting two high-temperature superconducting cable cores with identical structures. The high-temperature superconducting cable core connection device includes:

[0005] The first connecting conduit is fitted onto the stranded copper conductors of the two high-temperature superconducting cable cores and crimped together.

[0006] The first tin shield is screwed onto the first connecting conduit and liquid tin is injected for heating and fixation;

[0007] Two half-tile covers are interlocked and installed on the first connecting conduit;

[0008] The first wrapping semi-conductive tape is tightly wrapped with the second wrapping semi-conductive tape of the two high-temperature superconducting cable cores;

[0009] The first wrapping insulation tape is tightly wrapped around the second wrapping insulation tape of the two high-temperature superconducting cable cores;

[0010] The third wrapping semi-conductive tape is tightly wrapped with the fourth wrapping semi-conductive tape of the two high-temperature superconducting cable cores;

[0011] The second connecting conduit is fitted onto the third wrapped semi-conductive tape;

[0012] The second tin shield is fitted onto the second connecting conduit and liquid tin is injected for heating and fixation;

[0013] The third wrapping insulation tape is wrapped and connected to the fourth wrapping insulation tape of the two high-temperature superconducting cable cores respectively.

[0014] Furthermore, the first tin-blocking cover is a hollow tubular shape, and its outer shell includes a coaxial first cylindrical part and a first frustum part. A first injection port is provided on the side of the first cylindrical part for injecting liquid tin.

[0015] Furthermore, the second tin shield is a hollow tubular shape, and its outer shell includes a coaxial second cylindrical part and a second frustum part. A second injection port is provided on the side of the second cylindrical part for injecting liquid tin.

[0016] Furthermore, the second connecting conduit is a hollow tubular shape, with a reinforcing ring in the middle of its outer shell.

[0017] Furthermore, the first connecting conduit is a hollow tubular shape, and its outer shell is symmetrically provided with two limiting rings for limiting the position when assembled with the first solder shield.

[0018] Furthermore, the semi-circular cover is a hollow semi-cylinder, and the semi-circular cover has reinforcing ribs on the left and right sides and the middle. The semi-circular cover has a mounting hole in the center for fixing screws to pass through and fix the semi-circular cover to the first connecting conduit.

[0019] The present invention also provides a method for connecting the core of a high-temperature superconducting cable, implemented using the aforementioned high-temperature superconducting cable core connecting device, the method comprising:

[0020] Two second-stage tin shields are pre-fitted onto both sides of the second high-temperature superconducting tape, and the second connecting conduit is pre-fitted onto one side of the first high-temperature superconducting tape. Two first-stage tin shields are pre-fitted onto the first high-temperature superconducting tape.

[0021] The first connecting conduit is fitted onto the stranded copper conductors of the two high-temperature superconducting cable cores and crimped together.

[0022] The second tin-blocking cover, which is pre-fitted onto the second high-temperature superconducting tape of the two high-temperature superconducting cable cores, is moved toward each other and screwed onto the first connecting conduit. Then, liquid tin is injected from the first injection port on the first tin-blocking cover until it is full.

[0023] The two half-tile covers are interlocked and installed onto the first connecting conduit;

[0024] The first wrapping semiconductive tape, the first wrapping insulating tape, and the third wrapping semiconductive tape are sequentially overlapped and tightly wrapped with the second wrapping semiconductive tape, the second wrapping insulating tape, and the fourth wrapping semiconductive tape of the two high-temperature superconducting cable cores.

[0025] The second connecting conduit is moved to the center of the third wrapped semiconducting strip to form a symmetrical structure on both sides;

[0026] The second tin shield, pre-fitted on the second high-temperature superconducting tape, is moved to the middle and fitted onto the second connecting conduit to form a symmetrical structure on both sides; then liquid tin is injected from the second injection port on the second tin shield until it is full.

[0027] The third wrapping insulation tape is overlapped and wrapped layer by layer with the fourth wrapping insulation tape of the two high-temperature superconducting cable cores to achieve the connection of the two high-temperature superconducting cable cores.

[0028] Furthermore, the high-temperature superconducting cable core connection method also includes pre-processing the high-temperature superconducting cable core: performing staggered cutting processing on each layer of the stranded copper conductor, the first high-temperature superconducting tape, the second wrapped semiconducting tape, the second wrapped insulating tape, the fourth wrapped semiconducting tape, the second high-temperature superconducting tape, and the fourth wrapped insulating tape.

[0029] Furthermore, the high-temperature superconducting cable core connection method also includes layering and splitting the ends of the second wrapped semiconducting tape, the second wrapped insulating tape, the fourth wrapped semiconducting tape, and the fourth wrapped insulating tape.

[0030] Furthermore, the high-temperature superconducting cable core connection method further includes: after pre-fitting two second tin shields onto both sides of the second high-temperature superconducting tape, the second high-temperature superconducting tape is loosened; when the second connecting conduit is moved to the center of the third wrapped semiconducting tape, the loosened second high-temperature superconducting tape is loosened and gathered into a tubular shape, with the end stacked on the second connecting conduit.

[0031] The present invention has the following beneficial effects: The present invention has a simple and lightweight structure and low cost. It can be applied to the connection of single-core or three-core high-temperature superconducting cable cores in the production of second-generation high-temperature superconducting tapes, realize the connection and extension of multiple high-temperature superconducting cables, meet the needs of high-temperature superconducting cable line construction, and has certain promotion and application value. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional exploded structural diagram of a high-temperature superconducting cable core connection device according to Embodiment 1 of the present invention.

[0034] Figure 2 This is a schematic diagram of the structure of the high-temperature superconducting cable core in an embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the cross-sectional structure of the high-temperature superconducting cable core after pretreatment in an embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the assembly structure of the first tin-blocking cover, the second tin-blocking cover, the second connecting conduit with the second high-temperature superconducting tape and the first high-temperature superconducting tape in an embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of the structure of the first tin shield in an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the structure of the second tin shield in an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the structure of the second connecting conduit in an embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram of the assembly structure of the first connecting conduit and the stranded copper conductors of the two high-temperature superconducting cable cores in an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of the structure of the first connecting conduit in an embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram of the assembly structure of the first tin-blocking cover and the first connecting conduit in an embodiment of the present invention.

[0043] Figure 11 This is a schematic diagram of the assembly structure of the half-cover and the first connecting conduit in an embodiment of the present invention.

[0044] Figure 12 This is a schematic diagram of a partial assembly structure of the half-cover and the first connecting conduit in an embodiment of the present invention.

[0045] Figure 13 This is a schematic cross-sectional view of the half-tile cover in an embodiment of the present invention.

[0046] Figure 14 This is a schematic diagram of the structure after the corresponding wrapping strip is wrapped layer by layer in an embodiment of the present invention.

[0047] Figure 15 This is a schematic diagram of the assembly structure in an embodiment of the present invention, in which the second connecting conduit is moved to the center position of the third wrapped semiconductive strip.

[0048] Figure 16This is a schematic diagram of the assembly structure in which the second high-temperature superconducting tape of two high-temperature superconducting cable cores is brought together into a tubular shape in an embodiment of the present invention.

[0049] Figure 17 This is a schematic diagram of the assembly structure of the second tin-blocking cover and the second connecting conduit in an embodiment of the present invention.

[0050] Figure 18 This is a schematic diagram of the structure in an embodiment of the present invention, which shows how liquid tin is injected to fix the second tin shield and the second connecting conduit.

[0051] Figure 19 This is a schematic diagram of the structure in which the third wrapping insulating tape is wrapped and connected to the fourth wrapping insulating tape of the two high-temperature superconducting cable cores in an embodiment of the present invention. Detailed Implementation

[0052] The following descriptions of the embodiments are based on the accompanying drawings and illustrate specific embodiments in which the present invention can be implemented. It should be noted that the directional and positional terms mentioned in the embodiments of the present invention, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the directions or positions in the accompanying drawings. Therefore, the directional and positional terms used are for illustrating and understanding the present invention, and not for limiting the scope of protection of the present invention.

[0053] Please refer to Figure 1 , Figure 2 As shown, Embodiment 1 of the present invention provides a high-temperature superconducting cable core connection device for connecting two high-temperature superconducting cable cores with identical structures. The high-temperature superconducting cable core connection device includes:

[0054] The first connecting conduit 1 is fitted onto the stranded copper conductor A1 of the two high-temperature superconducting cable cores and crimped together.

[0055] The first tin shield 2 is screwed onto the first connecting conduit 1 and liquid tin is injected for heating and fixation;

[0056] Two half-tile covers 3 are interlocked and installed on the first connecting conduit 1;

[0057] The first wrapping semi-conductive tape 5 is tightly wrapped with the second wrapping semi-conductive tape A3 of the two high-temperature superconducting cable cores;

[0058] The first wrapping insulation tape 6 is tightly wrapped with the second wrapping insulation tape A4 of the two high-temperature superconducting cable cores;

[0059] The third wrapping semiconducting tape 7 is tightly wrapped with the fourth wrapping semiconducting tape A5 of the two high-temperature superconducting cable cores;

[0060] The second connecting conduit 8 is fitted onto the third wrapped semi-conductive strip 7;

[0061] The second tin shield 9 is fitted onto the second connecting conduit 8 and liquid tin is injected for heating and fixation;

[0062] The third wrapping insulation tape 10 is wrapped and connected to the fourth wrapping insulation tape A7 of the two high-temperature superconducting cable cores respectively.

[0063] Specifically, such as Figure 2 As shown, the structure of the high-temperature superconducting cable core from the inside out is as follows: stranded copper conductor A1 — first high-temperature superconducting tape A2 — second wrapped semiconducting tape A3 — second wrapped insulating tape A4 — fourth wrapped semiconducting tape A5 — second high-temperature superconducting tape A6 — fourth wrapped insulating tape A7.

[0064] When connecting two identical high-temperature superconducting cable cores using the high-temperature superconducting cable core connection device of this invention, pretreatment of the high-temperature superconducting cable cores is required: such as... Figure 3 As shown, the stranded copper conductor A1, the first high-temperature superconducting tape A2, the second wrapped semiconducting tape A3, the second wrapped insulating tape A4, the fourth wrapped semiconducting tape A5, the second high-temperature superconducting tape A6, and the fourth wrapped insulating tape A7 are all subjected to staggered cutting. The ends of the second wrapped semiconducting tape A3, the second wrapped insulating tape A4, the fourth wrapped semiconducting tape A5, and the fourth wrapped insulating tape A7 are split into layers.

[0065] The following describes the process of connecting two identical high-temperature superconducting cable cores using a high-temperature superconducting cable core connection device according to an embodiment of the present invention:

[0066] (a) such as Figure 4 As shown, two second tin-blocking covers 9 are pre-fitted onto both sides of the second high-temperature superconducting tape A6. Then, the second high-temperature superconducting tape A6 is spread out to form an umbrella shape, and the second connecting conduit 8 is pre-fitted onto one side of the first high-temperature superconducting tape A2. Next, two first tin-blocking covers 2 are pre-fitted onto the first high-temperature superconducting tape A2.

[0067] like Figure 5 As shown, in this embodiment, the first tin-blocking shield 2 is a hollow tubular shape, and its outer shell includes a coaxial first cylindrical portion 21 and a first frustum portion 22. A first injection port 20 is provided on the side of the first cylindrical portion 21 for injecting liquid tin. Figure 6 As shown, in this embodiment, the second tin-blocking shield 9 is also a hollow tubular shape, and its outer shell includes a coaxial second cylindrical portion 91 and a second frustum portion 92. A second injection port 90 is provided on the side of the second cylindrical portion 91 for injecting liquid tin. For example... Figure 7 As shown, in this embodiment, the second connecting conduit 8 is also a hollow tube, and its outer shell has a reinforcing ring 80 in the middle to provide structural strength during connection.

[0068] (ii) Figure 8 As shown, the first connecting conduit 1 is fitted onto the stranded copper conductor A1 of the two high-temperature superconducting cable cores and crimped together.

[0069] like Figure 9 As shown, in this embodiment, the first connecting conduit 1 is a hollow tube, and two limiting rings 11 are symmetrically provided on its outer shell for limiting when assembled with the first tin shield 2.

[0070] (III) Figure 10 As shown, the second tin-blocking cover 2, which is pre-fitted onto the second high-temperature superconducting tape A6 of the two high-temperature superconducting cable cores, is moved towards each other (i.e., moved towards the connection point of the two high-temperature superconducting cable cores) and screwed onto the first connecting conduit 1 until it stops at the limiting ring 11. Then, liquid tin is injected from the first injection port 20 on the first tin-blocking cover 2 until it is full, and then heated and cooled by a heating device to fix it.

[0071] (iv) such as Figure 11 , Figure 12 As shown, the two half-tile covers 3 are interlocked and installed onto the first connecting conduit 1, and then fixed with two fixing screws 4 respectively.

[0072] like Figure 13 As shown, in this embodiment, the semi-circular cover 3 is a hollow semi-cylinder. Two semi-circular covers 3 interlock to form a hollow cylinder, which encloses the first connecting conduit 1. The semi-circular cover 3 has reinforcing ribs 31 on its left and right sides and in the middle to provide structural strength during interlocking installation. The semi-circular cover 3 has a mounting hole 32 in its center for the fixing screw 4 to pass through and fix the semi-circular cover 3 to the first connecting conduit 1.

[0073] (V) such as Figure 14 As shown, the first wrapped semi-conductive tape 5, the first wrapped insulating tape 6, and the third wrapped semi-conductive tape 7 are sequentially layered and tightly wrapped with the second wrapped semi-conductive tape A3, the second wrapped insulating tape A4, and the fourth wrapped semi-conductive tape A5 of the two high-temperature superconducting cable cores. It is understandable that the first wrapped semi-conductive tape 5, the first wrapped insulating tape 6, and the third wrapped semi-conductive tape 7 have similar shapes and structures. Figure 14 Only the outermost third wrapping semiconducting tape 7 is shown.

[0074] (vi) such as Figure 15 As shown, the second connecting conduit 8 is moved to the center position of the third wrapped semiconductive strip 7.

[0075] (vii) such as Figure 16 As shown, the second high-temperature superconducting tape A6, which is spread out in an umbrella shape, is gathered into a tubular shape, and the end is stacked on the second connecting conduit 8 to form a symmetrical structure on both sides.

[0076] (viii) such as Figure 17 As shown, the second tin-blocking cover 9, pre-fitted onto the second high-temperature superconducting tape A6, is moved to the middle and fitted onto the second connecting conduit 8, forming a symmetrical structure on both sides. For example... Figure 18 As shown, liquid molten tin is injected into the second injection port 90 on the second tin shield 9 until it is full, and then heated and cooled by a heating device to fix it.

[0077] (ix) such as Figure 19 As shown, the third wrapping insulation tape 10 is overlapped and wrapped layer by layer with the fourth wrapping insulation tape A7 of the two high-temperature superconducting cable cores, and finally the two high-temperature superconducting cable cores are connected.

[0078] Embodiment 2 of the present invention also provides a method for connecting the core of a high-temperature superconducting cable, which is implemented using the high-temperature superconducting cable core connecting device as described in Embodiment 1 of the present invention. The method for connecting the core of a high-temperature superconducting cable includes:

[0079] Two second-stage tin shields are pre-fitted onto both sides of the second high-temperature superconducting tape, and the second connecting conduit is pre-fitted onto one side of the first high-temperature superconducting tape. Two first-stage tin shields are pre-fitted onto the first high-temperature superconducting tape.

[0080] The first connecting conduit is fitted onto the stranded copper conductors of the two high-temperature superconducting cable cores and crimped together.

[0081] The second tin-blocking cover, which is pre-fitted onto the second high-temperature superconducting tape of the two high-temperature superconducting cable cores, is moved toward each other and screwed onto the first connecting conduit. Then, liquid tin is injected from the first injection port on the first tin-blocking cover until it is full.

[0082] The two half-tile covers are interlocked and installed onto the first connecting conduit;

[0083] The first wrapping semiconductive tape, the first wrapping insulating tape, and the third wrapping semiconductive tape are sequentially overlapped and tightly wrapped with the second wrapping semiconductive tape, the second wrapping insulating tape, and the fourth wrapping semiconductive tape of the two high-temperature superconducting cable cores.

[0084] The second connecting conduit is moved to the center of the third wrapped semiconducting strip to form a symmetrical structure on both sides;

[0085] The second tin shield, pre-fitted on the second high-temperature superconducting tape, is moved to the middle and fitted onto the second connecting conduit to form a symmetrical structure on both sides; then liquid tin is injected from the second injection port on the second tin shield until it is full.

[0086] The third wrapping insulation tape is overlapped and wrapped layer by layer with the fourth wrapping insulation tape of the two high-temperature superconducting cable cores to achieve the connection of the two high-temperature superconducting cable cores.

[0087] Furthermore, the high-temperature superconducting cable core connection method also includes pre-processing the high-temperature superconducting cable core: performing staggered cutting processing on each layer of the stranded copper conductor, the first high-temperature superconducting tape, the second wrapped semiconducting tape, the second wrapped insulating tape, the fourth wrapped semiconducting tape, the second high-temperature superconducting tape, and the fourth wrapped insulating tape.

[0088] Furthermore, the high-temperature superconducting cable core connection method also includes layering and splitting the ends of the second wrapped semiconducting tape, the second wrapped insulating tape, the fourth wrapped semiconducting tape, and the fourth wrapped insulating tape.

[0089] Furthermore, the high-temperature superconducting cable core connection method further includes: after pre-fitting two second tin shields onto both sides of the second high-temperature superconducting tape, the second high-temperature superconducting tape is loosened; when the second connecting conduit is moved to the center of the third wrapped semiconducting tape, the loosened second high-temperature superconducting tape is loosened and gathered into a tubular shape, with the end stacked on the second connecting conduit.

[0090] For the structural principles and working process of this embodiment, please refer to the description of Embodiment 1 of the present invention, which will not be repeated here.

[0091] As can be seen from the above description, compared with the prior art, the beneficial effects of the present invention are that the present invention has a simple and lightweight structure, low cost, and can be applied to the connection of single-core or three-core high-temperature superconducting cable cores in the production of second-generation high-temperature superconducting tapes, realizing the connection and extension of multiple high-temperature superconducting cables, meeting the needs of high-temperature superconducting cable line construction, and has certain promotion and application value.

[0092] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A high-temperature superconducting cable core connection device for connecting two high-temperature superconducting cable cores with identical structures, characterized in that, The high-temperature superconducting cable core comprises, from the inside out, stranded copper conductor, first high-temperature superconducting tape, second wrapped semiconducting tape, second wrapped insulating tape, fourth wrapped semiconducting tape, second high-temperature superconducting tape, and fourth wrapped insulating tape. The high-temperature superconducting cable core connection device includes: The first connecting conduit is fitted onto the stranded copper conductors of the two high-temperature superconducting cable cores and crimped together. The first tin shield is screwed onto the first connecting conduit and liquid tin is injected for heating and fixation; Two half-tile covers are interlocked and installed on the first connecting conduit; The first wrapping semi-conductive tape is tightly wrapped with the second wrapping semi-conductive tape of the two high-temperature superconducting cable cores; The first wrapping insulation tape is tightly wrapped around the second wrapping insulation tape of the two high-temperature superconducting cable cores; The third wrapping semi-conductive tape is tightly wrapped with the fourth wrapping semi-conductive tape of the two high-temperature superconducting cable cores; The second connecting conduit is fitted onto the third wrapped semi-conductive tape; The second tin shield is fitted onto the second connecting conduit and liquid tin is injected for heating and fixation; The third wrapping insulation tape is wrapped and connected to the fourth wrapping insulation tape of the two high-temperature superconducting cable cores respectively.

2. The high-temperature superconducting cable core connection device according to claim 1, characterized in that, The first tin shield is a hollow tubular shape, and its outer shell includes a coaxial first cylindrical part and a first frustum part. A first injection port is provided on the side of the first cylindrical part for injecting liquid tin.

3. The high-temperature superconducting cable core connection device according to claim 1, characterized in that, The second tin shield is a hollow tubular shape, and its outer shell includes a coaxial second cylindrical part and a second frustum part. A second injection port is provided on the side of the second cylindrical part for injecting liquid tin.

4. The high-temperature superconducting cable core connection device according to claim 1, characterized in that, The second connecting conduit is a hollow tube with a reinforcing ring in the middle of its outer shell.

5. The high-temperature superconducting cable core connection device according to claim 1, characterized in that, The first connecting conduit is a hollow tube with two symmetrical limiting rings on its outer shell for limiting its position when assembled with the first solder shield.

6. The high-temperature superconducting cable core connection device according to claim 1, characterized in that, The semi-cylinder is a hollow semi-cylinder with reinforcing ribs on the left and right sides and in the middle. The semi-cylinder has a mounting hole in the center for fixing screws to pass through and fix the semi-cylinder to the first connecting conduit.

7. A method for connecting the core of a high-temperature superconducting cable, implemented using the high-temperature superconducting cable core connecting device as described in claim 1, characterized in that, The method for connecting the cores of the high-temperature superconducting cable includes: Two second-stage tin shields are pre-fitted onto both sides of the second high-temperature superconducting tape, and the second connecting conduit is pre-fitted onto one side of the first high-temperature superconducting tape. Two first-stage tin shields are pre-fitted onto the first high-temperature superconducting tape. The first connecting conduit is fitted onto the stranded copper conductors of the two high-temperature superconducting cable cores and crimped together. The second tin-blocking cover, which is pre-fitted onto the second high-temperature superconducting tape of the two high-temperature superconducting cable cores, is moved toward each other and screwed onto the first connecting conduit. Then, liquid tin is injected from the first injection port on the first tin-blocking cover until it is full. The two half-tile covers are interlocked and installed onto the first connecting conduit; The first wrapping semiconductive tape, the first wrapping insulating tape, and the third wrapping semiconductive tape are sequentially overlapped and tightly wrapped with the second wrapping semiconductive tape, the second wrapping insulating tape, and the fourth wrapping semiconductive tape of the two high-temperature superconducting cable cores. The second connecting conduit is moved to the center of the third wrapped semiconducting strip to form a symmetrical structure on both sides; The second tin shield, pre-fitted on the second high-temperature superconducting tape, is moved to the middle and fitted onto the second connecting conduit to form a symmetrical structure on both sides; then liquid tin is injected from the second injection port on the second tin shield until it is full. The third wrapping insulation tape is overlapped and wrapped layer by layer with the fourth wrapping insulation tape of the two high-temperature superconducting cable cores to achieve the connection of the two high-temperature superconducting cable cores.

8. The method for connecting the cores of a high-temperature superconducting cable according to claim 7, characterized in that, It also includes pretreatment of the high-temperature superconducting cable core: the stranded copper conductor, the first high-temperature superconducting tape, the second wrapped semiconducting tape, the second wrapped insulating tape, the fourth wrapped semiconducting tape, the second high-temperature superconducting tape, and the fourth wrapped insulating tape are all subjected to staggered cutting.

9. The method for connecting the cores of a high-temperature superconducting cable according to claim 8, characterized in that, It also includes layering and splitting the ends of the second wrapped semiconductive tape, the second wrapped insulating tape, the fourth wrapped semiconductive tape, and the fourth wrapped insulating tape.

10. The method for connecting the cores of a high-temperature superconducting cable according to claim 7, characterized in that, Also includes: After the two second tin shields are pre-fitted onto both sides of the second high-temperature superconducting tape, the second high-temperature superconducting tape is loosened. When the second connecting tube is moved to the center of the third wrapped semiconducting tape, the loosened second high-temperature superconducting tape is sorted and gathered into a tube shape, with the end stacked on the second connecting tube.

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