A measuring device for measuring a zero field in a tokamak device, a tokamak device

Abstract

This invention relates to the field of zero-field detection technology, specifically disclosing a measuring device for measuring the zero field within a tokamak device, and the tokamak device itself. It includes a magnetic probe fixing plate, within which several magnetic probes are disposed. The magnetic probe fixing plate is movably connected to a square frame, which is fixedly connected to a support frame. The support frame is movably connected to an annular support guide rail, and a limiting element is fixedly connected to the square frame. Through motor control, the zero field formed by the magnetic probe fixing plate at different circumferential positions within the tokamak device can be measured, solving the problems of fixed magnetic probe positions and high cost due to the large number of magnetic probes used. Simultaneously, the increased number of measurement points makes the measurement data more accurate. Because it can automatically measure the zero field at different circumferential positions of the device, the number of times the device needs to enter and exit the tokamak vacuum chamber and disassemble the array is reduced, ensuring the cleanliness of the vacuum chamber and reducing measurement errors and difficulty caused by human error.

Description

Technical Field

[0001] This invention relates to the field of magnetic field detection technology, and in particular to a device for measuring the zero field formed within a tokamak device, and a tokamak device. Background Technology

[0002] Plasma breakdown is one of the key issues in current tokamak devices and future reactor-scale devices. Plasma breakdown during ohmic discharge should meet the following two conditions: E φ ≥0.3V / m, E φ B φ / B V ≥1000V / m; Ohmic discharge is one of the important ways to start a tokamak. However, the success rate of this starting method is affected by the zero field generated by the ohmic coil and the compensation coil at the moment of breakdown. Therefore, the evaluation of the zero field region and location in the tokamak device is particularly important.

[0003] To evaluate the actual zero-field region and location of a tokamak device, the conventional approach is to use an m×n two- or three-dimensional magnetic probe array positioned at the center of the vacuum chamber to measure the magnitude of the magnetic field in space. This array is then connected to an integration and acquisition system for data recording and post-processing. Because the magnetic field magnitude in the zero-field region is approximately tens of Gauss, high requirements are placed on the spatial resolution, signal-to-noise ratio, and installation accuracy of the magnetic probes. Typically, to ensure measurement accuracy and the accuracy of zero-field reconstruction, the magnetic probe array is arranged relatively densely, which is related to the measurement requirements of the device and the zero-field configuration. To ensure the installation accuracy of the magnetic probes, their spatial positions are often fixed, and multiple fixtures are used to mitigate measurement errors caused by vibrations generated by device discharge during measurement. However, when reconstructing the zero field, points not measured by the magnetic probe array are simulated using numerical interpolation, which introduces some error into the results.

[0004] Meanwhile, the current approach involves fixing dozens or more probes directly to the support structure, making them immovable and fixed in the circumferential direction. This results in a large number of magnetic probes required, and the signal lines will be 2-3 times the number of probes, leading to high manufacturing costs. Measurements need to be taken at different circumferential positions within the device, increasing the frequency of entering and exiting the vacuum chamber and disassembling the array. This undoubtedly increases the possibility of measurement errors and the difficulty of measurement. As the size of tokamak devices continues to increase and the cleanliness of vacuum chambers continues to improve, the drawbacks of the current measurement scheme will become increasingly apparent in the construction of future magnetic confinement fusion devices. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a measuring device for measuring the zero field within a tokamak device, and a tokamak device.

[0006] A measuring apparatus for measuring the zero field within a tokamak device according to a first aspect of the present invention includes:

[0007] A magnetic probe fixing plate, comprising a first probe fixing plate and a second probe fixing plate, wherein a plurality of magnetic probe grooves are sequentially provided on the opposite surfaces of the first probe fixing plate and the second probe fixing plate, the grooves being used to fix the magnetic probe, and bolt holes are provided at both ends of the first probe fixing plate and the second probe fixing plate.

[0008] A semi-engaging transmission component is provided with bolt holes at the bottom of the semi-engaging transmission component. The first probe fixing plate, the semi-engaging transmission component and the second probe fixing plate are fixedly connected in sequence by bolts. The two end faces of the semi-engaging transmission component are provided with semi-circular arc grooves, and the walls of the semi-circular arc grooves are provided with threads.

[0009] A square frame, comprising a first square frame and a second square frame, wherein the first square frame and the second square frame are respectively movably connected to transmission threaded rods on their symmetrical end surfaces, and the transmission threaded rods (7) are threadedly engaged with the semi-circular arc groove wall of the semi-engaging transmission component.

[0010] A support frame is fixedly connected to the first square frame and the second square frame by bolts. A boss is fixedly provided at one end of the support frame. Load-bearing rollers and limiting rollers are movably connected to the two symmetrical side surfaces of the boss. A micro motor is fixedly installed on the surface of the boss. The output shaft of the micro motor is fixedly connected to a micro gear.

[0011] An annular support guide rail has a stepped cross-section. The stepped surface of the annular support guide rail is provided with a limiting groove. The sidewall of the limiting groove contacts the limiting roller. The limiting roller can move along the limiting groove. A toothed belt is provided on the outer surface of the annular support guide rail. The toothed belt meshes with the micro gear.

[0012] A limiting element is fixedly connected to the outer surface of the square frame away from the support frame, and the limiting element is close to the annular support guide rail.

[0013] According to an embodiment of the present invention, a measuring device for measuring the zero field within a tokamak device includes a magnetic probe fixing plate with several magnetic probe grooves for fixing magnetic probes; a semi-engaging transmission member is fixedly connected to the magnetic probe fixing plate at its bottom, and two symmetrical semi-circular arc threaded grooves of the semi-engaging transmission member respectively engage with a transmission threaded rod; two miniature bearing seats are fixedly provided on the symmetrical end surfaces of the first square frame and the second square frame, and the transmission threaded rod passes through the miniature bearing seats and is movably connected to the square frame; when the motor drives the transmission threaded rod to rotate, the magnetic probe fixing plate can move along the transmission threaded rod, that is, the magnetic probe fixing plate can perform measurements at any position within the plane of the square frame, ensuring measurement accuracy and the accuracy of redrawing the zero field. Furthermore, since fewer magnetic probes are used to measure more different positions, the number of magnetic probes used is reduced, thus lowering manufacturing costs. The support frame is fixedly installed in the middle of the square frame. The two ends of the support frame are movably connected to load-bearing rollers and limiting rollers. The rollers are used to reduce the friction of the support frame moving on the annular support guide rail and prevent the support frame from detaching from the annular support guide rail. A micro motor is fixedly installed on the surface of the support frame. The micro motor is connected to a micro gear. The micro gear meshes with the toothed belt on the annular support guide rail. When the motor is working, it can automatically move the square frame along the annular support guide rail. This is beneficial for measuring the zero field at different circumferential positions, reducing the number of times the array needs to be disassembled and the number of times it needs to enter and exit the vacuum chamber. This ensures the cleanliness of the vacuum chamber, reduces the possibility of measurement errors, and reduces the difficulty of measurement.

[0014] According to some embodiments of the present invention, a transmission gear is fixedly provided at one end of the transmission threaded rod, the transmission gear meshes with the motor transmission gear, and a transmission bevel gear is sequentially connected on the coaxial side of the motor transmission gear, which facilitates automatic control of the rotation of the transmission threaded rod.

[0015] According to some embodiments of the present invention, a miniature bearing seat is fixedly disposed on the inner surface of the first square frame, the miniature bearing seat is movably connected to the vertical transmission rod, and the miniature bearing seat is used to restrict the horizontal movement of the vertical transmission rod.

[0016] According to some embodiments of the present invention, bevel gears are fixedly provided at both ends of the vertical transmission rod, one end of the vertical transmission rod bevel gear meshes with the transmission bevel gear, and the other end of the vertical transmission rod bevel gear meshes with the driven bevel gear. The arrangement of the vertical transmission rod realizes the synchronous movement of two sets of transmission threaded rods.

[0017] The transmission bevel gear is connected to a transmission motor at the end of the gear shaft away from the motor transmission gear. The transmission motor is fixedly installed on the inner surface of the support frame and is used to drive the magnetic probe fixing plate to move along the transmission threaded rod.

[0018] According to some embodiments of the present invention, a limiting sleeve is further included, wherein the supporting frame is fixedly connected to the middle part of the square frame by bolts passing through the first probe fixing plate, the limiting sleeve, the supporting frame, the limiting sleeve and the second probe fixing plate in sequence.

[0019] According to some embodiments of the present invention, the load-bearing roller and the limiting roller are perpendicular to each other in spatial position, and the load-bearing roller contacts the stepped surface of the annular support guide rail. The load-bearing roller reduces the rotational friction of the detection device on the annular support guide rail, thereby increasing the service life of the detection device.

[0020] According to some embodiments of the present invention, the surface of the boss is away from the micro motor and is movably connected to the micro motor at the same position. The driven gear meshes with the toothed belt, which facilitates the movement of the automatic control detection device along the annular support guide rail.

[0021] According to some embodiments of the present invention, the shape of the groove is adapted to the magnetic probe, and the groove is linearly distributed on the upper surface of the first probe fixing plate and the second probe fixing plate, which facilitates the magnetic probe to better detect the zero field formed in the tokamak.

[0022] According to a second aspect of the present invention, in a tokamak device, the zero-field measuring device for the formation of a magnet in the tokamak device measures the zero field formed by the magnet in the tokamak device.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments 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.

[0025] Figure 1 This is a schematic diagram of the structure of a zero-field device for measuring the formation of a tokamak according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0027] Figure 3 This is a schematic diagram of the structure of the magnetic probe fixing plate according to an embodiment of the present invention;

[0028] Figure 4This is a schematic diagram of the structure of a semi-engaging transmission component according to an embodiment of the present invention;

[0029] Figure 5 This is a top view of the annular support guide rail according to an embodiment of the present invention;

[0030] Figure 6 This is a partial structural schematic diagram of the annular support guide rail according to an embodiment of the present invention;

[0031] Figure 7 This is a partial structural schematic diagram of the limiting element according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the connection between the support frame and the annular support guide rail according to an embodiment of the present invention;

[0033] Figure 9 This is a partial structural diagram of the fixed connection between the support frame and the square frame according to an embodiment of the present invention;

[0034] Figure label:

[0035] 1. Magnetic probe fixing plate; 11. First probe fixing plate; 12. Second probe fixing plate;

[0036] 2. Semi-engaging transmission component; 3. Square frame; 31. First square frame; 32. Second square frame;

[0037] 4. Support frame; 41. Load-bearing roller; 42. Limiting roller; 43. Boss; 44. Miniature gear; 45. Driven gear; 46. Motor transmission gear; 47. Transmission bevel gear; 48. Driven bevel gear; 49. Miniature bearing housing;

[0038] 5. Circular support guide rail; 51. Toothed belt; 52. Limiting groove; 53. Ladder platform;

[0039] 6. Limiting element; 7. Transmission threaded rod; 71. Transmission gear; 8. Limiting sleeve; 9. Vertical transmission rod. Detailed Implementation

[0040] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0041] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Example 1

[0044] See Figure 1-6 and Figure 8-9 This embodiment provides a measuring device for measuring the zero field within a tokamak device, including:

[0045] Magnetic probe fixing plate 1, square frame 3, support frame 4, annular support guide rail 5, and limiting sleeve 8; the magnetic probe fixing plate 1 (as shown in the image) Figure 3 (As shown) includes a first probe fixing plate 11 and a second probe fixing plate 12. A plurality of magnetic probe grooves are sequentially arranged on the opposing surfaces of the first probe fixing plate 11 and the second probe fixing plate 12. These grooves are used to fix the magnetic probes. Bolt holes are provided at both ends of the first probe fixing plate 11 and the second probe fixing plate 12. Semi-engaging transmission component 2 (e.g.) Figure 4 As shown in the figure, the bottom of the semi-engaging transmission component 2 is provided with bolt holes, and the first probe fixing plate 11, the semi-engaging transmission component 2 and the second probe fixing plate 12 are fixedly connected by bolts in sequence. The first probe fixing plate 11 and the second probe fixing plate 12 are both fixedly connected with semi-engaging transmission components. The two end faces of the semi-engaging transmission component 2 are provided with semi-circular arc grooves, and the walls of the semi-circular arc grooves are provided with threads.

[0046] The square frame 3 includes a first square frame 31 and a second square frame 32 (e.g., Figure 1 , Figure 2 and Figure 9As shown, the first square frame 31 and the second square frame 32 are movably connected to transmission threaded rods 7 on their symmetrical end surfaces. The transmission threaded rods 7 are threadedly engaged with the semi-circular arc groove wall of the semi-engaged transmission component 2. The semi-circular arc groove thread on one side of the semi-engaged transmission component 2 engages with the transmission threaded rod 7 on the first square frame 31, and the semi-circular arc groove thread on the other side of the semi-engaged transmission component 2 engages with the transmission threaded rod 7 on the second square frame 32. A transmission gear 71 is fixedly provided at one end of the transmission threaded rod 7. The transmission gear 71 meshes with a motor transmission gear 46. A transmission bevel gear 47 is sequentially connected to the coaxial side of the motor transmission gear 46. A transmission motor is connected to one end of the gear shaft of the transmission bevel gear 47. The transmission motor is fixedly installed on the inner surface of the support frame 4. The transmission motor is used to drive the magnetic probe fixing plate 1 to move along the transmission threaded rod 7. A miniature bearing seat 49 is fixedly provided on the inner surface of the first square frame 31. The miniature bearing seat 49 is movably connected to the vertical transmission rod 9 and is used to restrict the horizontal movement of the vertical transmission rod 9. One end of the vertical transmission rod has a bevel gear that meshes with the transmission bevel gear 47, and the other end of the vertical transmission rod has a bevel gear that meshes with the driven bevel gear 48. A motor driven gear is provided on one coaxial end of the driven gear. The motor driven gear is movably connected to two transmission threaded rods on the other end surfaces of the first square frame 31 and the second square frame 32. The driven bevel gear 48 is movably connected to the inner surface of the support frame 4. When the transmission motor is working, it drives the four transmission threaded rods to rotate simultaneously. Through the semi-engaged transmission component, the magnetic probe fixing plate 1 moves horizontally.

[0047] The support frame 4 is fixedly connected to the first square frame 31 and the second square frame 32 respectively by bolts (e.g. Figure 8 and Figure 9 (As shown) Bolts are sequentially passed through the first probe fixing plate 31, the limiting sleeve 8, the support frame 4, the limiting sleeve 8, and the second probe fixing plate 32 to fix the support frame 4 to the middle of the square frame 3. A boss 43 is fixedly provided at one end of the support frame 4. Load-bearing rollers 41 and limiting rollers 42 are movably connected to the two symmetrical side surfaces of the boss 43. A micro motor is fixedly installed on the surface of the boss 43, and the output shaft of the micro motor is fixedly connected to a micro gear 44. The cross-section of the annular support guide rail 5 is stepped (as shown). Figure 5 and Figure 6As shown, the stepped surface 53 of the annular support guide rail 5 is provided with a limiting groove 52. The sidewall of the limiting groove 52 contacts the limiting roller 42, and the limiting roller 42 can move along the limiting groove 52. A toothed belt 51 is provided on the outer surface of the annular support guide rail 5. The toothed belt 51 meshes with the micro gear 44. The load-bearing roller 41 and the limiting roller 42 are staggered and perpendicular to each other, and the load-bearing roller 41 contacts the stepped surface 53. When the micro motor is working, the micro gear 44 rotates along the toothed belt 51, thereby realizing the rotation of the square frame 3 and the support frame 4 along the annular support guide rail 5.

[0048] Example 2

[0049] See Figure 1 and Figure 7 In this embodiment, based on the above embodiment, the limiting element 6 is fixedly connected to the outer surface of the square frame 3, and the limiting element 6 is close to the annular support rail 5; the arc surface of the limiting element 6 is in contact with the outermost circular surface of the annular support rail 5, and the limiting element 6 is used to prevent the support frame 5 from shaking during movement.

[0050] Example 3

[0051] This embodiment provides a tokamak device, which uses the aforementioned zero-field measurement device to measure the zero field at different locations within the tokamak device. (See reference...) Figures 1 to 9 The entire measuring device is installed inside the tokamak. When it is necessary to measure the zero field formed at different positions on the same plane within the tokamak, the drive motor is controlled to drive the four drive threaded rods 7 on both sides of the first square frame 31 and the second square frame 32 to rotate simultaneously. Through the semi-engaged transmission component, the magnetic probe fixing plate 1 is then driven to move horizontally within the square frame 3. When it is necessary to measure the zero field formed at different positions on different planes within the tokamak, the annular support rail 5 is fixedly installed on the central column inside the tokamak. By controlling the micro motor 43, the micro gear moves along the toothed belt on the annular support rail 5. Due to the action of the limiting roller 41, the load-bearing roller 41, and the limiting element, the measuring device is ensured to remain on the annular support rail and maintain stability. This allows the measuring device to rotate along the annular support rail 5 within the tokamak, thus achieving the measurement of the zero field formed at different positions on different planes within the tokamak.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0053] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0055] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A measuring device for measuring the zero field within a tokamak device, characterized in that, include: A magnetic probe fixing plate (1) includes a first probe fixing plate (11) and a second probe fixing plate (12) arranged opposite to each other. A plurality of magnetic probe grooves are arranged on the opposite surfaces between the first probe fixing plate (11) and the second probe fixing plate (12). The grooves are used to fix the magnetic probe. Bolt holes are provided at both ends of the first probe fixing plate (11) and the second probe fixing plate (12). The semi-engaging transmission component (2) has bolt holes at its bottom. The first probe fixing plate (11), the semi-engaging transmission component (2), and the second probe fixing plate (12) are fixedly connected in sequence by bolts. The two ends of the semi-engaging transmission component (2) are provided with semi-circular arc grooves, and the walls of the semi-circular arc grooves are provided with threads. A square frame (3) includes a first square frame (31) and a second square frame (32). The first square frame (31) and the second square frame (32) are respectively connected to a transmission thread rod (7) on their symmetrical end surfaces. The transmission thread rod (7) is threadedly engaged with the semi-circular arc groove wall of the semi-engaged transmission component (2). A support frame (4) is fixedly connected to the first square frame (31) and the second square frame (32) by bolts. A boss (43) is fixedly provided at one end of the support frame (4). A load-bearing roller (41) and a limiting roller (42) are movably connected to the two symmetrical side surfaces of the boss (43). A micro motor is fixedly installed on the surface of the boss (43). A micro gear (44) is fixedly connected to the output shaft of the micro motor. An annular support guide rail (5) has a stepped cross-section. The stepped surface (53) of the annular support guide rail (5) is provided with a limiting groove (52). The side wall of the limiting groove (52) contacts the limiting roller (42). The limiting roller (42) can move along the limiting groove (52). A toothed belt (51) is provided on the outer surface of the annular support guide rail (5). The toothed belt (51) meshes with the micro gear (44). A limiting element (6) is fixedly connected to the outer surface of the square frame (3) away from the support frame (4), and the limiting element (6) is close to the annular support rail (5).

2. The measuring device for measuring the zero field within a tokamak device according to claim 1, characterized in that: One end of the transmission threaded rod (7) is fixedly provided with a transmission gear (71), which meshes with the motor transmission gear (46). The motor transmission gear (46) is connected to a transmission bevel gear (47) on the same side as the coaxial side.

3. The measuring device for measuring the zero field within a tokamak device according to claim 2, characterized in that: A miniature bearing seat (49) is fixedly provided on the inner surface of the first square frame (31). The miniature bearing seat (49) is movably connected to the vertical transmission rod (9). The miniature bearing seat (49) is used to restrict the horizontal movement of the vertical transmission rod (9).

4. The measuring device for measuring the zero field within a tokamak device according to claim 3, characterized in that: The vertical transmission rod is fixedly provided with bevel gears at both ends. One end of the vertical transmission rod bevel gear meshes with the transmission bevel gear (47), and the other end of the vertical transmission rod bevel gear meshes with the driven bevel gear (48). The driven bevel gear (48) is movably connected to the inner surface of the support frame (4).

5. The measuring device for measuring the zero field within a tokamak device according to claim 4, characterized in that: One end of the gear shaft of the transmission bevel gear (47) is connected to a transmission motor. The transmission motor is fixedly installed on the inner surface of the support frame (4). The transmission motor is used to drive the magnetic probe fixing plate (1) to move along the transmission threaded rod (7).

6. The measuring device for measuring the zero field within a tokamak device according to claim 1, characterized in that: It also includes a limiting sleeve (8), which is bolted through the first square frame (31), the limiting sleeve (8), the support frame (4), the limiting sleeve (8) and the second square frame (32) in sequence to fix the support frame (4) to the middle of the square frame (3).

7. The measuring device for measuring the zero field within a tokamak device according to claim 1, characterized in that: The load-bearing roller (41) and the limiting roller (42) are staggered and perpendicular to each other, and the load-bearing roller (41) is in contact with the ladder surface (53).

8. The measuring device for measuring the zero field within a tokamak device according to claim 1, characterized in that: A driven gear (45) is movably connected to the side of the boss (43) away from the micro motor, and the driven gear (45) meshes with the toothed belt (51).

9. The measuring device for measuring the zero field within a tokamak device according to claim 1, characterized in that: The shape of the magnetic probe groove is adapted to the magnetic probe, and the magnetic probe groove is linearly distributed on the upper surface of the first probe fixing plate (11) and the second probe fixing plate (12).

10. A tokamak device, characterized in that: It includes the measuring device as described in any one of claims 1-9.

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