Automatic winding method for turns insulation of a toroidal field Nb3Sn superconducting magnet for a nuclear fusion reactor

Abstract

The application provides a kind of nuclear fusion reactor toroidal field Nb3Sn superconducting magnet interturn insulation automatic wrapping method, comprising the following steps: coil partial isolation, coil lifting, partial wire bracket conductor, single-turn conductor broadcasting, conductor receiving, first-turn wire head manual wrapping insulation tape, above is the preparation stage of interturn insulation tape wrapping;First-turn conductor wrapping insulation tape, conductor drop, quench detection line laying, drop gauge size detection, conductor reference line detection, remove partition plate, second-turn conductor wrapping insulation tape, repeat the above steps to complete the tail-turn conductor insulation;Tail-turn wire head manual insulation, tail-turn conductor drop gauge, external dimension measurement;Insulation tape includes: glass silk tape, same winding tape, glass silk-polyimide composite tape.The application realizes the interturn insulation automatic wrapping of toroidal field magnet coil with radial plate-free multi-pie winding design, shortens the wrapping period of nuclear fusion reactor toroidal field superconducting magnet interturn insulation.

Description

Technical Field

[0001] This invention relates to the field of superconducting magnets for nuclear fusion reactors, and more specifically to an automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet for a nuclear fusion reactor. Background Technology

[0002] The toroidal field superconducting magnet is a key component of a nuclear fusion reactor. The toroidal magnetic field it generates is used to confine the plasma, and a stable magnetic field also helps suppress magnetohydrodynamic instabilities in the plasma, ensuring the nuclear fusion reactor can achieve higher operating parameters. During the manufacturing process of the superconducting magnet, the inter-turn insulation wrapping is a crucial step. Factors such as the overlap ratio, wrapping tension, and surface smoothness during the insulation wrapping process all affect the magnet's insulation performance and determine its operating parameters.

[0003] Currently, there are two main methods for winding the inter-turn insulation of toroidal field superconducting magnets in nuclear fusion reactors: manual winding and automatic winding. The EAST device in China, the JT-60SA device in Japan, and the KSTAR device in South Korea all use manual winding for the inter-turn insulation of their toroidal field magnets, and the quality of the insulation winding depends on the skill of the workers. The International Thermonuclear Experimental Reactor (ITER) uses a "double-panel winding + radial plate" design for its toroidal field magnet windings, and the inter-turn insulation is automatically wound. For toroidal field magnets using a multi-panel winding design without radial plates, there is currently no automatic winding method for inter-turn insulation. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides an automatic wrapping method for inter-turn insulation of Nb3Sn superconducting magnets in a nuclear fusion reactor toroidal field. This method shortens the wrapping cycle of inter-turn insulation of the superconducting magnets in the nuclear fusion reactor toroidal field, reduces the error in overlap rate and tension during the wrapping process of the insulation tape, and ensures the insulation performance of the superconducting magnet during operation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An automatic winding method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor, characterized in that the automatic winding process includes the following steps:

[0007] S1: Coil partial isolation: Use partition plates to isolate the turns and layers of the coil, leaving space for the insulation tape;

[0008] S2: Lifting the coil: The coil to be wound is lifted by a crane and lowered onto a temporary support;

[0009] S3: Conductor receiving bracket: 10 branching brackets move to the bottom of the coil to be wound to receive the conductor, and the temporary supports are removed;

[0010] S4: Single-turn conductor delivery: 10 sets of wire brackets move in an orderly manner in the radial and vertical directions, delivering single-turn conductors layer by layer and turn by turn;

[0011] S5: Single-turn conductor acceptance: The automatic wrapping mechanism accepts the single-turn conductor to be wrapped with the insulation tape, ensuring that the conductor does not wobble during the wrapping process;

[0012] S6: Manually wrap the insulation tape around the lead end of the first turn: According to the insulation structure of the coil, manually wrap the insulation tape around the lead end of the first turn conductor.

[0013] S7: Wrap insulation tape around the first turn of the conductor: The automatic wrapping mechanism automatically wraps the insulation tape around the conductor surface according to the insulation structure of the coil;

[0014] S8: Single-turn conductor drop: The single-turn conductor with insulation tape wrapped around it is dropped onto the support platform and fixed by a mold;

[0015] S9: Laying quench detection lines: Manually lay quench detection lines between adjacent conductors after insulation tape wrapping is completed;

[0016] S10: Demolding Dimension Inspection: After the single-turn conductor wrapped with insulation tape is demolded, the theoretical arc on the template is compared with the actual arc, and the radius of the actual arc is measured using a radius gauge to confirm the dimensions of the single-turn conductor after demolding.

[0017] S11: Conductor Reference Line Inspection: Compare the reference line on the single-turn conductor that has been wrapped with insulation tape with the reference line on the support platform to ensure that the conductor is in the correct position after being demolded;

[0018] S12: Remove the partition plate: After completing the insulation tape wrapping of the first turn of conductor, manually remove the partition plate between adjacent conductors of the coil that are not wrapped with insulation tape;

[0019] S13: Wrap the second turn of conductor with insulating tape;

[0020] S14: Repeat S8-S13 to complete the automatic wrapping of insulation tape around the multi-turn conductor;

[0021] S15: The tail turn conductor is wrapped with insulating tape;

[0022] S16: Repeat S8-S9 to complete the automatic wrapping of the insulation tape around the tail turn conductor;

[0023] S17: Manually wrap the insulation tape around the lead-out end of the tail turn: According to the insulation structure of the coil, manually wrap the insulation tape around the lead-out end of the tail turn conductor.

[0024] S18: Dropping the tail turn conductor: The completed insulation-to-be-wound tail turn conductor is dropped onto the support platform and fixed by the mold;

[0025] S19: External Dimension Measurement: After all conductors of the coil have been automatically wrapped with insulating tape and the coil is demolded, the external dimensions of the coil are measured using a laser tracker.

[0026] Furthermore, the insulating tape includes: glass fiber tape, co-wound tape, and glass fiber-polyimide composite tape.

[0027] Furthermore, the coils are isolated from each other and from each other using partition plates.

[0028] Furthermore, the sequence of releasing the single-turn conductor of the coil is consistent with the winding sequence of the coil.

[0029] Furthermore, the glass fiber-polyimide composite tape is laminated online during the automatic insulation wrapping process using glass fiber tape reels and polyimide tape reels, with a center deviation of ≤2mm.

[0030] Furthermore, the overlap rate of the glass ribbon and the glass fiber-polyimide composite tape is 40% to 50%, and the control accuracy of the overlap rate is ≤5%.

[0031] Furthermore, the wrapping pitch of the same winding tape is 400mm to 600mm and is continuously adjustable.

[0032] Furthermore, the wrapping tension of the glass fiber ribbon, the co-wrap ribbon, and the glass fiber-polyimide composite ribbon is 20N to 50N and is adjustable.

[0033] Furthermore, the conductor reference line is drawn from the conductor surface and marked on the surface of the insulating tape using a halogen-free marker.

[0034] Furthermore, the wrapping speed of the insulating tape is 3.5mm to 35mm in length of conductor wrapped with insulation per second, and the speed is continuously adjustable.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention realizes automatic winding of inter-turn insulation of circumferential field magnet coil with radial plate multi-panel winding design, shortens the winding cycle of inter-turn insulation of circumferential field superconducting magnet in nuclear fusion reactor, reduces the error of overlap rate and tension during the winding of insulation tape, ensures the flatness of insulation tape after winding, and ensures the insulation performance of superconducting magnet during operation. Attached Figure Description

[0036] The accompanying drawings, a portion of this specification, are provided to further illustrate the invention. The illustrative embodiments and descriptions are used to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0037] Figure 1This is a schematic diagram of the automatic wrapping method for inter-turn insulation of a Nb3Sn superconducting magnet in a circumferential field of a nuclear fusion reactor according to the present invention.

[0038] Figure 2 This is a graph showing the measurement results of the insulation tape overlap rate in a preferred embodiment of the present invention. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0040] like Figure 1 As shown, the automatic wrapping method for inter-turn insulation of the Nb3Sn superconducting magnet in the circumferential field of a nuclear fusion reactor according to the present invention specifically includes the following steps:

[0041] S1: Coil partial isolation: Use partition plates to isolate the turns and layers of the coil, leaving space for the insulation tape;

[0042] S2: Lifting the coil: The coil to be wound is lifted by a crane and lowered onto a temporary support;

[0043] S3: Conductor receiving bracket: 10 branching brackets move to the bottom of the coil to be wound to receive the conductor, and the temporary supports are removed;

[0044] S4: Single-turn conductor delivery: 10 sets of wire brackets move in an orderly manner in the radial and vertical directions, delivering single-turn conductors layer by layer and turn by turn;

[0045] S5: Single-turn conductor acceptance: The automatic wrapping mechanism accepts the single-turn conductor to be wrapped with the insulation tape, ensuring that the conductor does not wobble during the wrapping process;

[0046] S6: Manually wrap the insulation tape around the lead end of the first turn: According to the insulation structure of the coil, manually wrap the insulation tape around the lead end of the first turn conductor.

[0047] S7: Wrap insulation tape around the first turn of the conductor: The automatic wrapping mechanism automatically wraps the insulation tape around the conductor surface according to the insulation structure of the coil;

[0048] S8: Single-turn conductor drop: The single-turn conductor with insulation tape wrapped around it is dropped onto the support platform and fixed by a mold;

[0049] S9: Laying quench detection lines: Manually lay quench detection lines between adjacent conductors after insulation tape wrapping is completed;

[0050] S10: Demolding Dimension Inspection: After the single-turn conductor wrapped with insulation tape is demolded, the theoretical arc on the template is compared with the actual arc, and the radius of the actual arc is measured using a radius gauge to confirm the dimensions of the single-turn conductor after demolding.

[0051] S11: Conductor Reference Line Inspection: Compare the reference line on the single-turn conductor that has been wrapped with insulation tape with the reference line on the support platform to ensure that the conductor is in the correct position after being demolded;

[0052] S12: Remove the partition plate: After completing the insulation tape wrapping of the first turn of conductor, manually remove the partition plate between adjacent conductors of the coil that are not wrapped with insulation tape;

[0053] S13: Wrap the second turn of conductor with insulating tape;

[0054] S14: Repeat steps S8-S13 to complete the automatic wrapping of the insulation tape around the multi-turn conductor;

[0055] S15: The tail turn conductor is wrapped with insulating tape;

[0056] S16: Repeat steps S8-S9 to complete the automatic wrapping of the insulation tape around the tail turn conductor;

[0057] S17: Manually wrap the insulation tape around the lead-out end of the tail turn: According to the insulation structure of the coil, manually wrap the insulation tape around the lead-out end of the tail turn conductor.

[0058] S18: Dropping the tail turn conductor: The completed insulation-to-be-wound tail turn conductor is dropped onto the support platform and fixed by the mold;

[0059] S19: External Dimension Measurement: After all conductors of the coil have been automatically wrapped with insulating tape and the coil is demolded, the external dimensions of the coil are measured using a laser tracker.

[0060] Preferably, the insulating tape includes: glass fiber tape, co-wound tape, and glass fiber-polyimide composite tape.

[0061] Preferably, the turns and layers of the coil are isolated by partition plates.

[0062] Preferably, the sequence of releasing the single-turn conductor of the coil is consistent with the winding sequence of the coil.

[0063] Preferably, the glass fiber-polyimide composite tape is laminated online during the automatic insulation wrapping process using glass fiber tape reels and polyimide tape reels, with a center deviation of ≤2mm.

[0064] Preferably, the overlap rate of the glass ribbon and the glass fiber-polyimide composite tape is 40% to 50%, and the control accuracy of the overlap rate is ≤5%.

[0065] Preferably, the wrapping pitch of the same winding strip is 400mm to 600mm and is continuously adjustable.

[0066] Preferably, the wrapping tension of the glass fiber ribbon, the co-wrap ribbon, and the glass fiber-polyimide composite ribbon is 20N to 50N and is continuously adjustable.

[0067] Preferably, the conductor reference line is drawn from the conductor surface and marked on the surface of the insulating tape using a halogen-free marker.

[0068] Preferably, the wrapping speed of the insulating tape is to complete the insulation wrapping of a conductor with a length of 3.5mm to 35mm per second, and the speed is continuously adjustable.

[0069] As a preferred embodiment, an inter-turn insulation structure of "1 layer of glass fiber tape + 1 layer of co-wound tape + 3 layers of glass fiber-polyimide composite tape + 1 layer of glass fiber tape" is used for automatic inter-turn insulation wrapping. The glass fiber tape is 40mm wide and 0.15mm thick, with a 50% overlap rate; the co-wound tape is 15mm wide and 0.2mm thick, with a wrapping pitch of 450mm; and the polyimide tape is 32mm wide and 0.025mm thick, with a 50% overlap rate. The obtained overlap rate error is as follows: Figure 2 As shown. According to Figure 2 The results of the overlap rate error show that the error is no greater than 5%, indicating good wrapping quality.

[0070] The above description is merely a preferred embodiment of the present invention and is not restrictive. The accompanying drawings also show only one embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for automatically wrapping inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor, characterized in that, Includes the following steps: S1: Coil partial isolation: Use partition plates to isolate the turns and layers of the coil, leaving space for the insulation tape; S2: Lifting the coil: The coil to be wound is lifted by a crane and lowered onto a temporary support; S3: Conductor receiving bracket: 10 branching brackets move to the bottom of the coil to be wound to receive the conductor, and the temporary supports are removed; S4: Single-turn conductor delivery: 10 sets of wire brackets move in an orderly manner in the radial and vertical directions, delivering single-turn conductors layer by layer and turn by turn; S5: Single-turn conductor acceptance: The automatic wrapping mechanism accepts the single-turn conductor to be wrapped with the insulation tape, ensuring that the conductor does not wobble during the wrapping process; S6: Manually wrap the insulation tape around the lead end of the first turn: According to the insulation structure of the coil, manually wrap the insulation tape around the lead end of the first turn conductor. S7: Wrap insulation tape around the first turn of the conductor: The automatic wrapping mechanism automatically wraps the insulation tape around the conductor surface according to the insulation structure of the coil; S8: Single-turn conductor drop mold: The single-turn conductor with insulation tape wrapped around it is dropped onto the support platform and fixed by the mold; S9: Laying quench detection lines: Manually lay quench detection lines between adjacent conductors after the insulation tape has been wrapped; S10: Demolding Dimension Inspection: After the single-turn conductor wrapped with insulation tape is demolded, the theoretical arc on the template is compared with the actual arc, and the radius of the actual arc is measured using a radius gauge to confirm the dimensions of the single-turn conductor after demolding. S11: Conductor Reference Line Inspection: Compare the reference line on the single-turn conductor that has been wrapped with insulation tape with the reference line on the support platform to ensure that the conductor is in the correct position after being demolded; S12: Remove the partition plate: After completing the insulation tape wrapping of the first turn of conductor, manually remove the partition plate between adjacent conductors of the coil that are not wrapped with insulation tape; S13: Wrap the second turn of conductor with insulating tape; S14: Repeat S8-S13 to complete the automatic wrapping of the insulation tape around the multi-turn conductor; S15: The tail turn conductor is wrapped with insulating tape; S16: Repeat S8-S9 to complete the automatic wrapping of the insulation tape around the tail turn conductor; S17: Manually wrap the insulation tape around the lead-out end of the tail turn: According to the insulation structure of the coil, manually wrap the insulation tape around the lead-out end of the tail turn conductor. S18: Dropping the tail turn conductor: The completed insulation-to-be-wound tail turn conductor is dropped onto the support platform and fixed by the mold; S19: External Dimension Measurement: After all conductors of the coil have been automatically wrapped with insulating tape and the coil is demolded, the external dimensions of the coil are measured using a laser tracker.

2. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 1, characterized in that, The insulating tape includes glass fiber tape, co-wound tape, and glass fiber-polyimide composite tape.

3. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 1, characterized in that, The sequence of releasing the single-turn conductor of the coil is consistent with the winding sequence of the coil.

4. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 2, characterized in that, The glass fiber-polyimide composite tape is laminated online during the automatic insulation wrapping process using glass fiber tape reels and polyimide tape reels, with a center deviation of ≤2 mm.

5. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 2, characterized in that, The overlap rate of the glass fiber tape and the glass fiber-polyimide composite tape is 40%~50%, and the control accuracy of the overlap rate is ≤5%.

6. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 2, characterized in that, The wrapping pitch of the same winding tape is between 400 mm and 600 mm and is continuously adjustable.

7. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 2, characterized in that, The wrapping tension of the glass fiber ribbon, the co-wrap ribbon, and the glass fiber-polyimide composite ribbon is 20 N to 50 N and is continuously adjustable.

8. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 1, characterized in that, The conductor reference line is drawn from the conductor surface and marked on the surface of the insulating tape using a halogen-free marker.

9. The automatic wrapping method for inter-turn insulation of a circumferential field Nb3Sn superconducting magnet in a nuclear fusion reactor according to claim 1, characterized in that, The wrapping speed of the insulating tape is 3.5 mm to 35 mm in length per second, and the speed is continuously adjustable.

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