Distributed connector framework applied to parallel winding type superconducting coil and winding method of distributed connector framework

Abstract

The invention provides a distributed connector framework applied to a parallel winding type superconducting coil and a winding method thereof, the distributed connector framework comprises an upper framework and a lower framework which are oppositely arranged, the lower framework comprises a lower disc and a central column, and the central column is arranged on the lower disc and is in a spiral protrusion shape; a spiral gap exists between the spiral lines of the central column, the inner end of the strip is embedded in the strip groove and is fixedly arranged in a strip track formed by the spiral gap, and the inner side of the superconducting coil is supported by the central column; the upper framework comprises an upper disc and an outer column, the outer column is arranged on the upper disc and is in a circular-ring-shaped protrusion shape, the outer column and the center column are coaxially arranged and located outside the center column, a gap is formed in the outer column and used for leading out the strip outer end of the superconducting strip, and the outer side of the superconducting coil is supported through the outer column. The spiral central column structure is adopted, the contact area between the end strip and the framework is increased based on the spiral central column structure, the joint resistance of the parallel winding type high-temperature superconducting coil can be further reduced, and the heat loss problem of the joint is effectively relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting coils, and in particular to a distributed joint skeleton applied to a parallel-wound superconducting coil and a winding method thereof. Background Art

[0002] The parallel-wound superconducting coil is a new type of coil that combines the characteristics of the pancake-type high-temperature superconducting coil process and the bundled cable technology. It is made of multiple superconducting tapes directly stacked and co-wound, so that the cabling of the bundled cable and the winding of the coil are integrated and formed simultaneously. Compared with the traditional single-wound coil structure, the parallel-wound structure significantly reduces the coil inductance, thereby greatly accelerating its excitation and demagnetization process; in addition, when a local quench occurs in the coil, the current can be shunted through the joints between each parallel tape and the coil frame, effectively improving the quench stability of the coil. The shunting characteristics between the parallel tapes of this type of coil are greatly affected by the joint resistance. The power supply current is distributed between the parallel tapes according to the resistance value of each joint, and under the excitation / demagnetization condition, the charging / discharging rate of each parallel tape is related to the joint resistance value of the tape.

[0003] The current parallel-wound superconducting coil skeleton joints mainly adopt the annular distributed internal joint solution, such as Figure 1 As shown. In the coil skeleton structure with an annular distributed inner joint, a plurality of strip fixing grooves are evenly opened at the same interval on the central column of the metal skeleton. The end strip is directly and tightly connected to the skeleton through the solder layer. Then the strip is reversely bent at the groove mouth and wound counterclockwise into a coil. The metal skeleton serves as a current joint to supply power to the superconducting coil. However, due to the limited outer circumference of the annular central column and the limited contact area between the strip and the skeleton, the high Joule loss caused by the joint resistance will introduce additional heat sources to the coil, and this situation is more significant for small magnets; in addition, the limited size of the central column will limit the coil skeleton's ability to accommodate the number of parallel strips. When the number of parallel strips is greater than the number of strip fixing grooves, multiple strips need to be stacked and inserted into one strip fixing groove, and the stacked strips and the innermost strip and the skeleton are tightly connected by the solder layer. At this time, the internal joint resistance of each strip can be regarded as the series value of the resistance of the inner strip base layer and the resistance of the solder layer. Therefore, the resistance of the outer strip joint is larger, and the joint resistance distribution of each parallel strip is extremely uneven, and the difference may reach several orders of magnitude, thereby aggravating the uneven current carrying phenomenon between parallel strips and greatly increasing the risk of overcurrent failure of individual strips. In addition, when the number of stacked strips is large, the radius of the reverse bending part of the strip is larger, so that one side of the superconducting tape near the groove is suspended in the air and the other side is squeezed, forming a local stress concentration point. For strong field magnets, the joints are usually their weak points, which further increases the risk of local damage to the strip under strong electromagnetic stress.

[0004] After searching, it is found that there are some studies and patents on low-resistance skeletons for single-wound superconducting coils, but no spiral distributed low-resistance joint skeleton structure applied to parallel-wound superconducting coils has been found, nor is there a published patent. Similar patents are as follows:

[0005] Chinese patent application number: CN202210611753.0, patent name: Superconducting coil embedded in inner skeleton and its manufacturing method and system. The patent provides a superconducting coil embedded in inner skeleton and its manufacturing method and system, including: lower skeleton, inner skeleton and upper skeleton; there is a central protrusion in the center of the lower skeleton to provide central support for the coil; there are multiple annular grooves around the lower skeleton, which match the inner skeleton; there is an annular protrusion around the outer circle of the upper skeleton to provide mechanical support for the wound coil; along the height direction, from top to bottom, they are: upper skeleton, inner skeleton, lower skeleton; along the radius direction, from inside to outside, they are: the central protrusion of the lower skeleton, the inner skeleton, and the annular protrusion of the upper skeleton; based on the lower skeleton, the inner skeleton is embedded in the groove of the lower skeleton, and the upper skeleton is stacked on the lower skeleton. By embedding the inner skeleton in close contact with the superconducting tape during the winding process, reliable mechanical support can be provided for the superconducting tape; when the superconducting coil has a quench fault, the inner skeleton can also play the role of shunting and heat conduction, which greatly improves the stability of the superconducting coil. However, the superconducting coil embedded in the inner frame proposed in the patent is a single-winding high-temperature superconducting coil, which is wound by only a single strip; and the scheme does not include an optimized design for the joint resistance.

[0006] Chinese patent application number: CN202210529740.9, patent name: A detachable superconducting coil structure with low joint resistance and its winding method. The patent discloses a detachable superconducting coil structure with low joint resistance, including a plurality of coil bodies arranged in series in sequence and abutting each other, the coil body including: the upper skeleton includes an upper skeleton plate, the bottom surface of the upper skeleton plate is fixedly connected to an external support mechanism, and a first through hole is opened at the center of the top surface of the upper skeleton plate; the first through hole is located at the center of the external support mechanism; the lower skeleton includes a lower skeleton plate, the top surface of the lower skeleton plate is fixedly connected to an internal support mechanism, and a second through hole is opened at the center of the top surface of the lower skeleton plate, the first through hole and the second through hole are arranged correspondingly, and the second through hole is located at the center of the internal support mechanism; the external support mechanism abuts against the top surface of the lower skeleton plate, and a gap is left between the internal support mechanism and the upper skeleton plate; the upper skeleton plate and the lower skeleton plate are connected by bolts; one end of the superconducting tape is wound around the outside of the internal support mechanism and is located between the internal support mechanism and the external support mechanism, and the other end of the superconducting tape is wound around the outside of the external support mechanism. However, the superconducting coil structure with low joint resistance proposed in the patent is applied to a single-winding high-temperature superconducting coil wound with a single strip, and its internal support structure is composed of only a cylindrical metal center column, and the strip at the joint has no external mechanical support. Summary of the invention

[0007] In view of the defects in the prior art, an object of the present invention is to provide a distributed joint skeleton for parallel-wound superconducting coils and a winding method thereof.

[0008] The distributed joint frame for parallel-wound superconducting coils provided by the present invention comprises an upper frame and a lower frame arranged opposite to each other, wherein the lower frame comprises a lower plate and a central column, wherein the central column is arranged on the lower plate and is spirally protruding;

[0009] There is a spiral gap between the spirals of the central column, the inner end of the superconducting tape forming the superconducting coil is fixedly arranged in the tape track formed by the spiral gap to form an inner joint, and the inner side of the superconducting coil is supported by the central column;

[0010] The upper skeleton includes an upper plate and an outer column. The outer column is arranged on the upper plate and is a circular protrusion. The outer column is coaxially arranged with the central column and is located outside the central column. A gap is opened on the outer column for leading out the outer end of the superconducting tape. The outer end of the tape forms an external joint after passing through the gap. The outer side of the superconducting coil is supported by the outer column.

[0011] Preferably, a plurality of strip fixing grooves are formed on the central column.

[0012] Preferably, the plurality of strip fixing grooves are evenly arranged along the spiral of the central column;

[0013] The number of the tape fixing grooves is the same as the number of the superconducting tapes wound in parallel.

[0014] Preferably, the strip fixing groove is opened along the height direction of the central column, and its depth is the same as the height of the central column;

[0015] The width and length of the strip fixing groove both match the size of the central column.

[0016] Preferably, the thickness of the strip track gradually increases along the circumferential direction, and the thickness of the strip track is the same as the total thickness of the inner end of the strip accommodated therein.

[0017] Preferably, both the upper surface of the lower plate and the lower surface of the upper plate are affixed with insulating tape to achieve electrical insulation between the superconducting coil body.

[0018] Preferably, the gap on the outer column is arc-shaped, and the arc matches the winding direction of the superconducting coil.

[0019] Preferably, the central column and the lower plate are each provided with a first threaded hole for assembly with the upper frame, and the upper plate is provided with a second threaded hole corresponding to the first threaded hole for assembly with the lower frame.

[0020] The method for winding a distributed joint skeleton applied to a parallel-wound superconducting coil provided by the present invention comprises the following steps:

[0021] Step 1: Winding a superconducting tape into a spiral tape track, bending the inner end of the superconducting tape in the opposite direction and inserting it into the tape fixing groove to achieve fixing;

[0022] Step 2: A welding sheet is sandwiched between the inner end of each superconducting tape and the contact area between the central column, and the superconducting tape is tightly attached to the central column through the welding sheet;

[0023] Step 3: Winding the coil at a constant tension and at a uniform speed until all the pre-wound superconducting tapes are wound around the outside of the central column, at which point the outer diameter of the superconducting coil body is equal to the inner diameter of the outer column;

[0024] Step 4: Cover the superconducting coil body and the lower frame with an upper frame, and the outer column covers the superconducting coil body. The outer end of the superconducting tape passes through the gap of the outer column, and is wound for one turn at a constant tension and close to the outer surface of the outer column. During the winding, a layer of welding sheet is inserted between the innermost superconducting tape and the outer column, and between adjacent parallel superconducting tapes.

[0025] Step 5: After winding is completed, the superconducting coil is placed in a vacuum heating table to heat it so that the solder piece is melted by the heat. After the solder piece is fully melted, the superconducting coil is taken out and placed in a room temperature environment. After solidification, the coil is formed.

[0026] Preferably, in step 1, in a coil formed by winding multiple superconducting tapes in parallel, a superconducting tape is inserted into each tape fixing groove, the outermost superconducting tape is inserted into the tape fixing groove closest to the center of the central column, and the innermost superconducting tape is inserted into the tape fixing groove farthest from the center of the central column, and each superconducting tape is assigned to a different tape fixing groove in this order.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention adopts the technical means of a spiral center column structure to increase the contact area between the inner end strip and the coil frame based on the spiral center column structure, which can further reduce the joint resistance of the parallel-wound high-temperature superconducting coil and effectively alleviate the problem of joint heat loss.

[0029] 2. The present invention adopts the technical means of evenly opening strip joint fixing grooves on the spiral center column. More fixing grooves can be opened by increasing the number of spiral turns, thereby improving the coil skeleton's capacity to accommodate the number of parallel strips, effectively solving the problem of the coil skeleton's limited capacity to accommodate the number of parallel strips, thereby solving the problem of strip accumulation at the joint when there are a large number of parallel strips and multiple strips need to be inserted into the same fixing groove, thereby avoiding local stress concentration.

[0030] 3. The spiral groove of the present invention provides internal and external mechanical support for the inner end strip, effectively improving the mechanical stability and operational safety of the parallel-wound coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 It is a structural schematic diagram of a ring-shaped distributed inner joint skeleton in the prior art;

[0033] Figure 2 It is a schematic diagram of the structure of the lower skeleton in the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the upper skeleton in the present invention;

[0035] Figure 4 The present invention is based on Figure 2 Half-section schematic diagram in the direction of the dotted line A.

[0036] The figure shows:

[0037] Center column 1 Gap 7

[0038] Strip fixing groove 2 Upper plate 8

[0039] Strip rail 3 Second threaded hole 9

[0040] Lower plate 4 Soldering piece 10

[0041] First threaded hole 5 Strip inner end 11

[0042] Outer column 6 Insulation tape 12 DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0044] The present invention discloses a distributed joint skeleton applied to a parallel-wound superconducting coil. The structure adopts a spiral central column. The contact area between the end strip and the skeleton is increased based on the spiral central column structure, so that the joint resistance of the parallel-wound high-temperature superconducting coil can be further reduced, and the problem of joint heat loss can be effectively alleviated; the coil skeleton's capacity to accommodate the number of parallel strips is effectively improved; mechanical support is provided for the strip at the joint, and the operation safety of the parallel-wound superconducting coil is further improved.

[0045] According to the distributed joint frame for parallel-wound superconducting coils provided by the present invention, Figure 2-3 As shown, it comprises an upper frame and a lower frame arranged opposite to each other, the lower frame comprises a lower plate 4 and a central column 1, the central column 1 is arranged on the lower plate 4 and is spirally protruding;

[0046] There is a spiral gap between the spirals of the central column 1, and the inner end 11 of the superconducting tape forming the superconducting coil is fixedly arranged in the tape track 3 formed by the spiral gap to form an inner joint, and the inner side of the superconducting coil is supported by the central column 1; by providing the spiral central column 1, the contact area between the inner end 11 of the tape and the central column 1 can be effectively increased, thereby reducing the resistance of the inner joint and solving the problem of heat loss; further, the spiral groove provides mechanical support for the tape at the inner joint, further improving the operating safety of the parallel-wound coil.

[0047] like Figure 2 As shown, the upper skeleton includes an upper plate 8 and an outer column 6. The outer column 6 is arranged on the upper plate 8 and is annularly protruding. The outer column 6 is coaxially arranged with the central column 1 and is located outside the central column 1. A gap 7 is opened on the outer column 6 for leading out the outer end of the superconducting tape. The outer end of the tape passes through the gap 7 to form an external joint. The outer side of the superconducting coil is supported by the outer column 6. The outer column 6 plays the role of conducting the external joint and mechanically supporting the outer side of the coil. The gap 7 on the outer column 6 is arc-shaped, and the arc matches the winding direction of the superconducting coil. It is used to lead out the outer end of the tape. Its width is determined according to the number and size of parallel tapes. The upper surface of the lower plate 4 and the lower surface of the upper plate 8 are both affixed with insulating tape 12 to achieve electrical insulation between the superconducting coil body.

[0048] The central column 1 is provided with a plurality of strip fixing grooves 2. The plurality of strip fixing grooves 2 are evenly arranged along the spiral of the central column 1; the number of the strip fixing grooves 2 is the same as the number of superconducting strips arranged in parallel. The strip fixing grooves 2 are opened along the height direction of the central column 1, and the depth thereof is the same as the height of the central column 1; the width and length of the strip fixing grooves 2 match the size of the central column 1. The spiral central column 1 is evenly provided with strip fixing grooves 2, and more strip fixing grooves 2 can be opened by increasing the number of spiral turns, which effectively solves the problem of the limited capacity of the coil skeleton to accommodate the number of parallel strips, and realizes the design of multiple parallel magnets; further, by improving the capacity of the coil skeleton to accommodate the number of parallel strips, the problem of strip accumulation at the joints when the number of parallel strips is large is solved, and the problem of local stress concentration is solved. The strip track 3 provides mechanical support for the inner end 11 of the strip. The thickness of the strip track 3 is the same as the total thickness of the inner end 11 of the strip it accommodates. The thickness of the strip track 3 gradually increases along the circumferential direction. The specific size depends on the geometric position distribution of the strip fixing groove 2 and the thickness of the strip used.

[0049] The central column 1 and the lower plate 4 are both provided with a first threaded hole 5 for assembly with the upper frame, and the upper plate 8 is provided with a second threaded hole 9 corresponding to the first threaded hole 5 for assembly with the lower frame.

[0050] The method for winding a distributed joint skeleton applied to a parallel-wound superconducting coil provided by the present invention comprises the following steps:

[0051] Step 1: Wind the superconducting tape into the spiral tape track 3, reversely bend the inner end 11 of the superconducting tape and insert it into the tape fixing groove 2 to fix it;

[0052] In a coil formed by winding multiple superconducting tapes in parallel, a superconducting tape is inserted into each tape fixing groove 2, the outermost superconducting tape is inserted into the tape fixing groove 2 closest to the center of the central column 1, and the innermost superconducting tape is inserted into the tape fixing groove 2 farthest from the center of the central column 1, and each superconducting tape is distributed to a different tape fixing groove 2 in this order;

[0053] Step 2: A welding sheet 10 is sandwiched between the inner end 11 of each superconducting tape and the contact area between the central column 1, and the superconducting tape is closely attached to the central column 1 through the welding sheet 10;

[0054] Step 3: Winding the coil at a constant tension and at a uniform speed until all the pre-wound superconducting tapes are wound around the outside of the central column 1, at which point the outer diameter of the superconducting coil body is equal to the inner diameter of the outer column 6;

[0055] Step 4: Cover the superconducting coil body and the lower frame with the upper frame, and the outer column 6 covers the superconducting coil body. The outer end of the superconducting tape passes through the gap 7 of the outer column 6, and is wound for one turn with constant tension and close to the outer surface of the outer column 6. During the winding, a layer of welding sheet 10 is inserted between the innermost superconducting tape and the outer column 6, and between adjacent parallel superconducting tapes.

[0056] Step 5: After winding is completed, the superconducting coil is placed in a vacuum heating table for heating so that the welding sheet 10 is heated and melted. After the welding sheet 10 is fully melted, the superconducting coil is taken out and placed in a room temperature environment. After solidification, the coil is formed.

[0057] The above is a basic embodiment of the present invention. The scheme of the present invention is further described below through several preferred embodiments;

[0058] Example 1

[0059] This embodiment provides a distributed joint frame for parallel-wound high-temperature superconducting coils, the core part of which is composed of an upper frame and a lower frame, and the material used is a metal material with good electrical and thermal conductivity;

[0060] Lower skeleton Figure 2 As shown, the center column 1 is a spiral protrusion structure located on the lower plate 4, which plays the role of joint conductivity and internal mechanical support. There are multiple strip fixing grooves 2 evenly opened at the same distance on its upper edge, which play the role of fixing the end strip of the inner joint. The number of grooves is the same as the number of parallel strips, and the depth is the same as the height of the center column 1. The width and length are determined according to the size of the center column 1. There is a strip track 3 between the spirals of the center column 1 to provide mechanical support for the end strip. Its width is the same as the thickness of the inner end strip accommodated and gradually increases along the circumferential direction. The specific size is determined according to the geometric position distribution of the strip fixing groove 2 and the thickness of the strip used. The upper surface of the lower plate 4 ( Figure 2 The surface shown in the figure is affixed with an insulating tape 12 to achieve electrical insulation between the coil body, and the central column 1 and the lower plate 4 are both provided with a first threaded hole 5 for assembly with the upper frame.

[0061] Upper skeleton Figure 3 As shown, the outer column 6 is a circular protruding structure located on the upper plate 8, which plays the role of joint conduction and mechanical support of the outer side of the coil. The outer column 6 is provided with a gap 7 with an arc edge for leading out the superconducting tape, and its width is determined according to the number and size of the parallel tapes. The upper plate 8 is provided with a second threaded hole 9 for assembly with the lower frame. The lower surface of the upper plate 8 ( Figure 3 The surface shown in the figure is pasted with an insulating tape 12 to achieve electrical insulation between the coil body. It should be noted that Figure 2 and Figure 3It only represents the physical structure of the coil skeleton, and does not limit the specific skeleton size, number of spiral turns, number of strip fixing grooves and number of threaded holes.

[0062] Example 2

[0063] This embodiment provides a parallel-wound superconducting coil winding process based on the embodiment 1. The relevant coil frame structure has been proposed in the embodiment 1. The corresponding parallel-wound coil winding process flow is described as follows: the finished parallel-wound superconducting coil is wound along the dividing line A (such as Figure 2 ) is shown in the cross-section diagram Figure 4 As shown:

[0064] (1) Wind the superconducting tape into the spiral tape track 3 (along the Figure 2 ), bend the end of the strip in the opposite direction (towards Figure 2 In the clockwise direction of the center column, the strip is inserted into the strip fixing groove 2 of the center column 1 and fixed in the lower frame; in the coil formed by winding multiple superconducting strips in parallel, one strip is inserted into each strip fixing groove 2, the outermost strip is inserted into the strip fixing groove 2 closest to the center of the center column 1, and the innermost strip is inserted into the strip fixing groove 2 farthest from the center of the center column 1, and each strip is distributed to different grooves in this order;

[0065] (2) When making the joint of the first strip, a thin solder sheet is sandwiched between the strip and the metal frame. The width of the solder sheet is slightly less than or equal to the width of the strip, and the length is equal to the distance from the groove opening to the next groove opening. When winding the coil, the end strip is tightly fitted to the center column 1 through the solder sheet. The production method of other strip joints is the same. After the production of each strip joint is completed, the inner end 11 of the strip will completely fill the spiral strip track 3. At this time, the strip track 3 serves as a conductive joint and mechanical support for the end strip.

[0066] (3) Winding the coil at a constant tension and at a uniform speed until the pre-wound strip is completely wound into the coil frame, at which point the outer diameter of the coil body is equal to the inner diameter of the outer column 6 of the upper frame;

[0067] (4) Cover the upper frame on the coil body and the lower frame, and the outer column 6 of the upper frame covers the coil body. The other end of the strip passes through the gap of the outer column and continues to be wound for 1 turn with constant tension and close to the outer surface of the outer column. During winding, a thin welding sheet is inserted between the innermost strip and the outer column and between adjacent parallel strips, and its width is slightly less than or equal to the strip width;

[0068] (5) After winding is completed, the entire coil is placed in a vacuum heating table to heat it so that the soldering pieces in the inner and outer joints are heated and melted, so that uniform and tight electrical contact is formed between the strips at the joints and between the strips and the metal frame. After the soldering pieces are fully melted, the coil is taken out and placed in a room temperature environment. After solidification, the coil is formed.

[0069] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A distributed joint frame for a parallel-wound superconducting coil, characterized in that: It comprises an upper frame and a lower frame which are arranged opposite to each other, the lower frame comprises a lower plate (4) and a central column (1), and the central column (1) is arranged on the lower plate (4) and is spirally protruding; There is a spiral gap between the spirals of the central column (1), and the inner end (11) of the superconducting tape forming the superconducting coil is fixedly arranged in the tape track (3) formed by the spiral gap to form an inner joint, and the inner side of the superconducting coil is supported by the central column (1); The upper skeleton comprises an upper plate (8) and an outer column (6); the outer column (6) is arranged on the upper plate (8) and is in the form of a circular protrusion; the outer column (6) is coaxially arranged with the central column (1) and is located outside the central column (1); a gap (7) is provided on the outer column (6) for leading out the outer end of the superconducting tape; the outer end of the tape passes through the gap (7) to form an external joint; and the outer side of the superconducting coil is supported by the outer column (6).

2. The distributed joint skeleton of the parallel-wound superconducting coil according to claim 1, characterized in that: The central column (1) is provided with a plurality of strip fixing grooves (2).

3. The distributed joint skeleton of the parallel-wound superconducting coil according to claim 2, characterized in that: The plurality of strip fixing grooves (2) are evenly arranged along the spiral of the central column (1); The number of the tape fixing grooves (2) is the same as the number of the superconducting tapes arranged in parallel.

4. The distributed joint skeleton of the parallel-wound superconducting coil according to claim 2, characterized in that: The strip fixing groove (2) is opened along the height direction of the central column (1), and its depth is the same as the height of the central column (1); The width and length of the strip fixing groove (2) both match the size of the central column (1).

5. The distributed joint skeleton of the parallel-wound superconducting coil according to claim 1, characterized in that: The thickness of the strip track (3) gradually increases along the circumferential direction, and the thickness of the strip track (3) is the same as the total thickness of the inner end (11) of the strip accommodated therein.

6. The distributed joint skeleton of the parallel-wound superconducting coil according to claim 1, characterized in that: The upper surface of the lower plate (4) and the lower surface of the upper plate (8) are both affixed with insulating tape (12) to achieve electrical insulation between the superconducting coil body.

7. The distributed joint skeleton of the parallel-wound superconducting coil according to claim 1, characterized in that: The gap (7) on the outer column (6) is arc-shaped, and the arc matches the winding direction of the superconducting coil.

8. The distributed joint skeleton of the parallel-wound superconducting coil according to claim 1, characterized in that: The central column (1) and the lower plate (4) are both provided with a first threaded hole (5) for assembly with the upper frame, and the upper plate (8) is provided with a second threaded hole (9) corresponding to the first threaded hole (5) for assembly with the lower frame.

9. A method for winding a distributed joint skeleton for a parallel-wound superconducting coil according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: Step 1: Winding a superconducting tape into a spiral tape track (3), bending the inner end (11) of the superconducting tape in the opposite direction and inserting it into the tape fixing groove (2) to achieve fixing; Step 2: a layer of welding sheet (10) is sandwiched between the contact area between the inner end (11) of each superconducting tape and the central column (1), and the superconducting tape is closely attached to the central column (1) through the welding sheet (10); Step 3: Winding the coil at a constant tension and at a uniform speed until all the pre-wound superconducting tape is wound around the outside of the central column (1), and at this time, the outer diameter of the superconducting coil body is equal to the inner diameter of the outer column (6); Step 4: Cover the superconducting coil body and the lower frame with an upper frame, and the outer column (6) covers the superconducting coil body. The outer end of the superconducting tape passes through the gap (7) of the outer column (6), and is wound for one turn at a constant tension and close to the outer surface of the outer column (6). During the winding, a layer of welding sheet (10) is inserted between the innermost superconducting tape and the outer column (6), and between adjacent parallel superconducting tapes. Step 5: After winding is completed, the superconducting coil is placed in a vacuum heating table for heating so that the welding sheet (10) is heated and melted. After the welding sheet (10) is fully melted, the superconducting coil is taken out and placed in a room temperature environment. After solidification, the coil is formed.

10. The method for winding a distributed joint skeleton for a parallel-wound superconducting coil according to claim 9, characterized in that: In step 1, in a coil formed by winding a plurality of superconducting tapes in parallel, a superconducting tape is inserted into each tape fixing groove (2), the outermost superconducting tape is inserted into the tape fixing groove (2) closest to the center of the central column (1), and the innermost superconducting tape is inserted into the tape fixing groove (2) farthest from the center of the central column (1), and each superconducting tape is allocated to a different tape fixing groove (2) in this order.

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