Supporting device for TF coil under operation of fusion magnet

Abstract

The invention relates to the technical field of fusion magnets, in particular to a supporting device for a TF coil under the operation of a fusion magnet, and the supporting device comprises a mounting seat which supports and fixes the TF coil; the first supporting piece is located on one side of the bottom of the mounting base; the second supporting piece is located on the other side of the bottom of the mounting base, a fixing block is arranged on the top, a sliding groove is formed in the fixing block, and the mounting base can horizontally move along the sliding groove. The fixing block is an electromagnet, and when current is input, the fixing block can generate electromagnetic force for pushing the mounting base to be away from the second supporting piece and electromagnetic force for lifting the mounting base upwards. According to the supporting device, the motion margin in the horizontal direction is provided for the TF coil and the mounting base, the stress of the supporting device in the horizontal direction is reduced, the reliability of the supporting device is improved, and then the stability and reliability of the TF coil and even the whole superconducting magnet system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fusion magnets, and in particular to a supporting device for a TF coil in operation of a fusion magnet. Background Art

[0002] The superconducting magnet system is one of the core components of the fusion device. The system includes three key coils: the longitudinal field coil (TF coil), the poloidal field coil (PF), and the central spiral tube coil (CS coil). All three coils operate under low temperature conditions. During the specific installation, the PF coil is fixed to the TF coil by the support structure, the CS coil is supported by the longitudinal field magnet, and the TF coil is installed on the longitudinal field magnet support structure. In other words, the weight of the entire superconducting magnet system is borne by the structural parts supporting the TF magnet.

[0003] During the fusion reaction process, the TF coil will be affected by temperature and undergo thermal expansion to generate thermal stress, and will generate force under the action of a complex magnetic field. The thermal stress and the force generated by the magnetic field will work together to cause the TF coil to slip in the horizontal direction. In the prior art, the structural parts supporting the TF magnet are rigid structures that are unable to disperse and absorb the stress generated by the horizontal slip of the TF coil, causing fatigue damage or fracture under long-term operation, thereby affecting the stability and reliability of the TF magnet and even the entire superconducting magnet system.

[0004] Therefore, how to disperse and absorb the stress generated by the horizontal slip of the TF coil and improve the stability of the TF coil and even the entire superconducting magnet system has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] The present invention provides a supporting device for a TF coil under operation of a fusion magnet, so as to solve the problem of how to disperse and absorb the stress generated by the horizontal slip of the TF coil and improve the stability of the TF coil and even the entire superconducting magnet system.

[0006] The present invention provides a supporting device for a TF coil under operation of a fusion magnet, comprising: Mounting base, supporting and fixing the TF coil; A first support member, located at one side of the bottom of the mounting base; The second support member is located at the other side of the bottom of the mounting seat, and a fixing block is provided on the top. A sliding groove is provided in the fixing block, and the mounting seat can move horizontally along the sliding groove.

[0007] In some embodiments, the fixing block is an electromagnet, and when current is passed through it, it can generate an electromagnetic force that pushes the mounting seat away from the second support member, and an electromagnetic force that lifts the mounting seat upward.

[0008] In some of the embodiments, a limiting plate is provided at the end of the slide slot, and a spring is connected to a side of the limiting plate close to the mounting seat.

[0009] In some of the embodiments, an arc-shaped groove is provided on the top of the mounting seat to fit with the bottom of the TF coil.

[0010] In some of the embodiments, the bottom of the mounting seat is a slide plate, and the slide plate can move horizontally along the slide groove.

[0011] In some embodiments, the second support member further comprises: Rigid support structure; A thermal insulation structure mounted on a rigid support structure; The flexible supporting structure is installed on the thermal insulation structure, and a fixing block is installed on the top.

[0012] In some of the embodiments, the flexible support structure includes a plurality of sequentially stacked flexible plates, each of which is in a trapezoidal shape.

[0013] In some of the embodiments, the thermal insulation structure includes a flat thermal insulation chamber, and the thermal insulation chamber is evacuated.

[0014] In some embodiments, the rigid support structure comprises: Main frame; The heat sink is longitudinally arranged on the outer periphery of the main frame and is narrow at the top and wide at the bottom.

[0015] In some of these embodiments, the rigid support structure further comprises: The cooling pipe is coiled in the gap between the heat sinks in a serpentine shape, and circulating cooling water is passed into the cooling pipe; The outer cover is sleeved on the outer periphery of the main frame, the heat sink and the cooling pipe.

[0016] The beneficial effects of the present invention are as follows: Compared with the prior art, the structural member supporting the TF magnet is a rigid structure, which cannot disperse and absorb the stress generated by the horizontal sliding of the TF coil, causing fatigue damage or fracture under long-term operation, thereby affecting the stability and reliability of the TF coil and even the entire superconducting magnet system. The support device for the TF coil under the operation of the fusion magnet of the present invention is provided with a fixed block on the top of the second support member, and a slide groove is provided in the fixed block. The TF coil drives the mounting seat to move along the slide groove in the horizontal direction, providing a horizontal movement margin for the TF coil and the mounting seat, reducing the stress in the horizontal direction of the support device, improving the reliability of the support device, and thus improving the stability and reliability of the TF coil and even the entire superconducting magnet system; the present invention designs the fixed block as an electromagnet, passes current, and can generate an electromagnetic force that pushes the mounting seat away from the second support member, as well as an electromagnetic force that lifts the mounting seat upward, thereby reducing the horizontal displacement of the TF coil, thereby reducing the horizontal thrust on the fixed block, and at the same time reducing the downward pressure of the TF coil on the support device, that is, reducing the pressure and horizontal stress borne by the support device as a whole, improving the reliability of the support device, and thus improving the stability and reliability of the TF coil and even the entire superconducting magnet system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a supporting device for a TF coil under operation of a fusion magnet according to the present invention; Figure 2 yes Figure 1 A schematic structural diagram of a second support member shown; Figure 3 yes Figure 1 The schematic diagram of the structure of the TF coil and the mounting base is shown; Figure 4 yes Figure 1 A schematic diagram of the structure of the fixed block shown; Figure 5 yes Figure 1 A schematic diagram of the rigid support structure shown; Figure 6 yes Figure 1 A schematic diagram of the thermal insulation structure shown; Figure 7 It is a schematic diagram of the assembly of heat sink and cooling pipe.

[0018] Explanation of the accompanying drawings: 1. Mounting seat; 11. Arc groove; 2. TF coil; 3. First support member; 4. Second support member; 41. Fixed block; 42. Slide groove; 43. Spring; 44. Rigid support structure; 45. Thermal insulation structure; 46. Flexible support structure; 47. Tough plate; 48. Heat sink; 49. Cooling pipe; 5. CS coil. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] As described in the background technology, the traditional structural parts supporting the TF magnet are rigid structures that cannot disperse and absorb the stress generated by the horizontal slip of the TF coil, causing fatigue damage or fracture under long-term operation, thereby affecting the stability and reliability of the TF magnet and even the entire superconducting magnet system. Therefore, how to disperse and absorb the stress generated by the horizontal slip of the TF coil and improve the stability of the TF coil and even the entire superconducting magnet system has become a technical problem that needs to be solved urgently by those skilled in the art.

[0021] To solve the above problems, refer to Figure 1-Figure 7 The present invention provides a support device for a TF coil under the operation of a fusion magnet, the support device comprising: a mounting seat 1, a first support member 3 and a second support member 4, the TF coil 2 is fixedly mounted on the mounting seat 1, the first support member 3 and the second support member 4 are located on both sides of the bottom of the mounting seat 1, and respectively provide gravity support to the two ends of the bottom of the mounting seat 1. The top of the first support member 3 is an L-shaped structure, and the end of the top of the first support member 3 is used to support the TF coil 2, and the L-shaped structure is used to support and fix the CS coil 5, so as to simultaneously support and fix the TF coil 2 and the CS coil 5. A fixing block 41 is provided on the top of the second support member 4, and a slide groove 42 is provided in the fixing block 41, and the mounting seat 1 can move horizontally along the slide groove 42.

[0022] During the fusion reaction, the TF coil 2 generates thermal stress due to thermal expansion and generates force under the action of a complex magnetic field. Under the combined force of thermal stress and magnetic field force, the TF coil 2 will slide horizontally, that is, the TF coil 2 drives the mounting base 1 to slide along the slide groove 42 toward the fixed block 1. By providing the fixed block 41 and the slide groove 42, a margin space is reserved for the horizontal sliding of the TF coil. On the one hand, it ensures that the TF coil 2 will not be deformed by a large force, thereby affecting the position of the PF coil and the CS coil 5 supported and fixed by the TF coil 2, and affecting the stability and reliability of the entire superconducting magnet system; on the other hand, it reduces the horizontal impact stress on the supporting device, reduces the deformation of the supporting device, and improves the reliability of the supporting device, thereby improving the stability and reliability of the TF coil 2 and even the entire superconducting magnet system.

[0023] Preferably, the fixing block 41 is an electromagnet, and current is passed through the electromagnet to generate an electromagnetic force that pushes the mounting seat 1 away from the second support member 4, and an electromagnetic force that lifts the mounting seat 1 upward. On the one hand, the horizontal sliding distance of the TF coil 2 is reduced, thereby reducing the horizontal impact stress of the TF coil 2 and the mounting seat 1 on the fixing block 2, and improving the stability and reliability of the supporting device; on the other hand, the pressure of the TF coil 2 and even the entire superconducting magnet system on the supporting device is reduced, the longitudinal force of the supporting device is reduced, the stability and reliability of the supporting device are improved, and the service life of the supporting device is extended.

[0024] Preferably, if Figure 4 As shown, a limit plate is provided at the end of the slide groove 42, and a spring 43 is connected to the side of the limit plate close to the mounting seat 1. There are multiple springs 43. When the TF coil 2 and the mounting seat 1 slide toward the fixed block 2, an impact force is generated on the fixed block 2. The spring 43 resists the mounting seat 1, and a buffering effect is generated on the sliding movement of the TF coil 2 and the mounting seat 1, thereby reducing the impact force of the TF coil 2 and the mounting seat 1 on the fixed block 2, and can disperse and absorb the impact force, thereby improving the stability and reliability of the support device and extending the service life of the support device.

[0025] Preferably, if Figure 3 As shown, an arc groove 11 is provided on the top of the mounting base 1 to match the bottom of the TF coil 2. That is, the shape of the arc groove 11 is consistent with the curvature of the bottom of the TF coil 2. The bottom of the TF coil 2 is inserted into the arc groove 11. The arc groove 11 wraps around both sides of the bottom of the TF coil 2, thereby firmly fixing the TF coil 2 on the mounting base 1. When the TF coil 2 expands due to heat and slides horizontally, the TF coil 2 can still remain fixed on the mounting base 1.

[0026] Preferably, if Figure 3 As shown, the bottom of the mounting base 1 is a slide plate, which can move horizontally along the slide groove 42. Exemplarily, the mounting base 1 is a vertically placed plate, with an arc groove 11 on the top and a horizontal surface at the bottom. The bottom of the mounting plate 1 is set as a slide plate, which is convenient for cooperating with the slide groove 42, so that the TF coil 2 and the mounting plate 1 can move horizontally along the slide groove 42.

[0027] Preferably, if Figure 2As shown, the second support member 4 also includes: a rigid support structure 44, a heat-insulating structure 45 and a flexible support structure 46 connected in sequence from bottom to top, and a fixing block 41 is installed on the top of the flexible support structure 46. The rigid support structure 44 provides a stable bottom support for the second support member 4 to ensure the stable operation and safety of the fusion reaction device and improve the reliability of the overall system. The heat-insulating structure 45 has a certain mechanical strength. On the one hand, it plays a role in connecting and reinforcing the rigid support structure 44 and the flexible support structure 46; on the other hand, it can also isolate the heat transfer between the rigid support structure 44 and the flexible support structure 46. The flexible support structure 46 can meet the functional requirements of the fusion magnet to shrink under low-temperature operation, and can also disperse and release the stress generated by the slippage of the TF coil 2.

[0028] Preferably, the flexible support structure 46 includes a plurality of tough plates 47 stacked in sequence, and the plurality of tough plates 47 are connected and fixed. The shape of the tough plates 47 is a trapezoid, that is, narrow at the top and wide at the bottom. The material of the tough plates 47 is austenitic stainless steel, which is non-magnetic but has high toughness and plasticity. The TF coil 2 slides horizontally and impacts the fixed block 2. The fixed block 2 transfers the stress received to the flexible support structure 46. The tough plates 47 close to the TF coil 2 are first subjected to the stress. On the one hand, in the horizontal direction, the tough plates 47 close to the TF coil 2 transfer the stress to the tough plates 47 far away from the TF coil 2 in sequence; on the other hand, in the vertical direction, the tough plates 47 transfer the stress downward, and the stress is continuously dispersed and attenuated during the transfer process, thereby achieving the effect of absorbing and dispersing the stress generated by the slip of the TF coil 2. The tough plates 47 are designed to be a trapezoidal structure that is narrow at the top and wide at the bottom. On the one hand, the stability of the flexible support structure 46 is improved; on the other hand, it is conducive to the downward dispersion and absorption of the sliding stress.

[0029] Preferably, if Figure 6 As shown, the heat insulation structure 45 includes a flat heat insulation cavity. The heat insulation cavity of the flat structure has good stability. The heat insulation cavity is evacuated. The vacuum design makes the heat insulation cavity have good heat insulation effect. The upper and lower surfaces of the heat insulation cavity are stacked with heat insulation boards, and the heat insulation boards are composite materials. The heat of the rigid support structure 46 passes through the heat insulation board, the heat insulation cavity and the heat insulation board in sequence, and the heat is isolated and blocked multiple times to prevent the heat from being transmitted to the TF coil 2.

[0030] Preferably, Figure 5 As shown, the rigid support structure 46 includes: a main frame and a heat sink 48. The heat sink 48 is longitudinally arranged on the periphery of the main frame and is narrow at the top and wide at the bottom. The main frame is a rectangular hollow tube structure, which provides vertical support for the rigid support structure 46. The heat sink 48, which is narrow at the top and wide at the bottom, improves the stability of the rigid support structure 46 on the one hand, and controls the heat transfer path on the other hand, so that the heat is concentrated in the lower part, reducing the heat in the upper part, thereby reducing the heat exchange between the rigid support structure 46 and the flexible support structure 46.

[0031] Preferably, if Figure 7 As shown, the rigid support structure 46 also includes: a cooling pipe 49 and an outer cover. The cooling pipe 49 is coiled in a serpentine shape in the gap between the heat sinks 48. Circulating cooling water flows into the cooling pipe 49. The outer cover is sleeved on the outer periphery of the main frame, the heat sinks 48 and the cooling pipe 49.

[0032] It should be noted that the bottom of the support device is connected to the room temperature Dewar chassis, which is at room temperature, and the top is connected to the TF coil 2, which is in a low temperature environment. In order to effectively manage the heat conducted from the room temperature end to the low temperature end and prevent the heat from being transmitted from the bottom Dewar chassis to the TF coil 2, a heat anchor cooling system must be integrated at an appropriate position of the support device. On the one hand, the present application sets up a heat insulation structure 45 to isolate the rigid support structure 44 from the flexible support structure 46 to prevent heat from being transmitted from the rigid support structure 44 to the flexible support structure 46; on the other hand, by setting up a heat sink 48, a cooling pipe 49 and an outer cover, the rigid support structure 46 is dissipated by the heat sink 48, and the cooling pipe 49 on the heat sink 48 is coiled to achieve cooling of the heat sink 48 by the cooling pipe 49. The outer cover is sleeved on the outer periphery of the heat sink 48 and the cooling pipe 49, and the outer cover seals the heat sink 48 and the cooling pipe 49 in a certain space to prevent the heat of the heat sink 48 and the rigid support structure 44 from being transferred upward to the TF coil 2 through the external air. It can be seen that the present application achieves effective thermal isolation between the Dewar chassis and the TF coil 2 through the synergistic effect of the thermal insulation structure 45, the heat sink 48, the cooling pipe 49 and the outer cover.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0037] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A support device for a TF coil under operation of a fusion magnet, characterized in that: include: A mounting base, supporting and fixing the TF coil; A first support member, located at one side of the bottom of the mounting base; The second support member is located at the other side of the bottom of the mounting seat, and a fixing block is provided on the top. A sliding groove is provided in the fixing block, and the mounting seat can move horizontally along the sliding groove.

2. The supporting device for TF coils in operation of fusion magnets according to claim 1, characterized in that: The fixing block is an electromagnet, and when current is passed through it, it can generate an electromagnetic force that pushes the mounting seat away from the second support member, and an electromagnetic force that lifts the mounting seat upward.

3. The supporting device for TF coils in operation of fusion magnets according to claim 1, characterized in that: A limiting plate is provided at the end of the slide slot, and a spring is connected to a side of the limiting plate close to the mounting seat.

4. The supporting device for TF coils in operation of fusion magnets according to claim 1, characterized in that: An arc-shaped groove is provided on the top of the mounting seat to match the bottom of the TF coil.

5. The supporting device for TF coils in operation of fusion magnets according to claim 1, characterized in that: The bottom of the mounting seat is a slide plate, and the slide plate can move horizontally along the slide groove.

6. The supporting device for TF coils in operation of fusion magnets according to any one of claims 1 to 5, characterized in that: The second support member further comprises: Rigid support structure; A heat-insulating structure mounted on the rigid supporting structure; The flexible supporting structure is installed on the thermal insulation structure, and the fixing block is installed on the top.

7. The supporting device for TF coils in operation of fusion magnets according to claim 6, characterized in that: The flexible support structure includes a plurality of sequentially stacked tough plates, and the tough plates are in a trapezoidal shape.

8. The supporting device for TF coils in operation of fusion magnets according to claim 6, characterized in that: The heat insulation structure comprises a flat heat insulation cavity, and the heat insulation cavity is evacuated.

9. The supporting device for TF coils in operation of fusion magnets according to claim 6, characterized in that: The rigid support structure comprises: Main frame; The heat sink is longitudinally arranged on the outer periphery of the main frame and is narrow at the top and wide at the bottom.

10. The supporting device for TF coils in operation of fusion magnets according to claim 6, characterized in that: The rigid support structure also includes: A cooling pipe is coiled in a serpentine shape in the gaps between the heat sinks, and circulating cooling water is passed through the cooling pipe; The outer cover is sleeved on the outer periphery of the main frame, the heat sink and the cooling pipe.

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