Modularized lifting device and method for superconducting coil of nuclear fusion

Abstract

The application discloses a modular hoisting device and method for superconducting coil of nuclear fusion, and belongs to the field of manufacturing of nuclear fusion armored superconducting coil. The device comprises a hanger body connected with a hoisting device through an adjustable steel cable and a plurality of coil clamps. A plurality of gravity center adjusting devices capable of moving on the hanger body are arranged on the hanger body. The center position of the superconducting coil in different states is always consistent with the hoisting point by changing the position of the gravity center adjusting device on the hanger body. The application dynamically compensates the gravity center deviation of the superconducting coil in different manufacturing process states caused by factors such as installation of external structural members and winding deformation by using the displacement of the counterweight block. The overall gravity center of the superconducting coil in any state and process can always keep on the same plumb line with the hoisting point, so that the coil inclination, swing and local stress concentration caused by eccentric hoisting are avoided, and the hoisting safety and the coil forming precision are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of manufacturing armored superconducting coils for nuclear fusion, specifically a modular hoisting device and method for superconducting coils used in nuclear fusion. Background Technology

[0002] Fusion energy is safe, clean, and inexhaustible, making it one of the most ideal ultimate energy sources for the future. However, fusion energy development is extremely difficult, and superconducting tokamak is currently one of the most promising pathways to achieving fusion energy. Existing nuclear fusion superconducting tokamak experimental devices worldwide, such as China's EAST, South Korea's KSTAR, and Japan's JT-60SA, all use armored superconducting conductors for coil winding manufacturing. As a core component of the fusion device, the high-strength magnetic field generated by the superconducting coil during operation can stably confine the plasma, ensuring the continuous fusion reaction. Therefore, the manufacturing quality of the superconducting coil determines whether the nuclear fusion device can operate stably. Nuclear fusion superconducting coils are enormous in size and weight, and their shape varies depending on the stage of the process. Traditional hoisting methods involve customized hoisting frames for each coil, meaning a different hoisting fixture is customized for each change in the coil's state throughout the production process. This method is costly and detrimental to on-site safety. Furthermore, a single, unadjustable hoisting frame can easily cause single-point deformation of the coil during hoisting, severely affecting the forming accuracy and quality of the superconducting coil.

[0003] To address the aforementioned issues, there is an urgent need for a convenient hoisting device for superconducting coils to achieve high-quality manufacturing of superconducting coils. Summary of the Invention

[0004] The purpose of this invention is to provide a modular hoisting device and method for superconducting coils used in nuclear fusion, which is applicable to the entire manufacturing process of superconducting coils and enables precise control of the contour during hoisting and transportation.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned technical objectives is as follows: a modular hoisting device for superconducting coils for nuclear fusion, comprising a frame body connected to a hoisting device via an adjustable steel wire cable, and a plurality of coil clamps connected to the superconducting coils are vertically arranged on the frame body. A plurality of center-of-gravity adjustment devices that can move on the frame body are arranged on the frame body, each center-of-gravity adjustment device having a counterweight. By changing the position of the center-of-gravity adjustment device on the frame body, the center position of the superconducting coil is always consistent with the hoisting point in different states.

[0006] As an optimized solution for the aforementioned modular hoisting device for superconducting coils used in nuclear fusion, the center of gravity adjustment device includes a base plate and a top plate connected by several tie rods. At least two limiting rods are provided on the base plate, extending through and above the top plate. The counterweight is slidably engaged with the limiting rods and is located on the upper surface of the top plate. Two upper limit plates are symmetrically distributed on the lower surface of the top plate. The two upper limit plates are located on both sides of the hoist body, and a roller that rolls on the upper surface of the hoist body is provided between the two upper limit plates.

[0007] As another optimized solution for the modular hoisting device for superconducting coils used in nuclear fusion, the two upper limit plates are equipped with locking fasteners that compress the sides of the hoist body.

[0008] As another optimized solution for the modular hoisting device for superconducting coils used in nuclear fusion, the upper surface of the base plate is provided with two lower limit plates corresponding to the upper limit plate.

[0009] As another optimized solution for the modular hoisting device for superconducting coils used in nuclear fusion, the coil clamp includes a hollow metal frame connected to the hanger body by turnbuckles. A bottom fixed nylon block, a side movable nylon block, and a top movable nylon block are arranged in the hollow cavity of the metal frame. The side movable nylon blocks and the top movable nylon blocks can be adjusted in position by adjusting bolts and, together with the bottom fixed nylon block, clamp the superconducting coil.

[0010] As another optimized solution for the modular hoisting device for superconducting coils used in nuclear fusion, the bottom fixed nylon block has a contour surface that matches the shape of the superconducting coil clamping point.

[0011] As another optimized solution for the modular hoisting device for superconducting coils used in nuclear fusion, the main body of the hoist is provided with a special-shaped hoist, which is a special-shaped metal frame adapted to the contour of the external structural components of the superconducting coil.

[0012] As another optimized solution for the modular hoisting device for superconducting coils used in nuclear fusion, the adjustable steel wire cable is connected to the hoisting equipment through turnbuckles, and the hoist body is in a horizontal state when unloaded.

[0013] A modular hoisting method for superconducting coils used in nuclear fusion includes the following steps: 1) Fabricate a hanger body and an irregularly shaped hanger that match the outline of the superconducting coil, and ensure that the hanger body is horizontal when lifted under no-load. 2) Use coil clamps to connect the superconducting coil to the hanger body; 3) Several movable center of gravity adjustment devices are installed on the hanger body. Each center of gravity adjustment device has a counterweight. By changing the position of the center of gravity adjustment device on the hanger body, the center position of the superconducting coil is always consistent with the lifting point under different conditions.

[0014] As an optimized solution for the modular hoisting method of superconducting coils for nuclear fusion, in step 2), when the superconducting coil is connected to the hoist body using a coil clamp, the coil clamp is perpendicular to the ground to ensure that the force at each hoisting point of the superconducting coil is vertically upward.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1) This invention provides a center of gravity adjustment device that can move along the hanger body. The displacement of the counterweight is used to dynamically compensate for the center of gravity shift of the superconducting coil caused by factors such as the installation of external structural components and winding deformation in different manufacturing processes. This ensures that whether it is a superconducting magnet coil winding in the winding forming state or a complete superconducting coil after installing external structural components such as terminal boxes, its overall center of gravity can always be kept on the same vertical line as the lifting point. This avoids coil tilting, swaying and local stress concentration caused by eccentric lifting, and significantly improves the safety of lifting and the accuracy of coil forming. 2) The center of gravity adjustment device in this invention adopts a frame structure consisting of a base plate, a top plate, a tie rod, and a limiting rod. The position can be flexibly adjusted by the rollers set under the top plate rolling on the upper surface of the hanger body. At the same time, the upper limit plate cooperates with the side of the hanger body to provide guidance and limiting function, which not only ensures the smooth movement of the center of gravity adjustment device on the hanger body, but also ensures its positioning reliability after locking. The design of the counterweight block slidingly cooperating with the limiting rod and being placed on the upper surface of the top plate makes it possible to quickly complete the installation, removal and fine adjustment of the position of the counterweight block without the need for special tools, which greatly improves the convenience and efficiency of on-site operation. 3) The coil clamp in this invention is connected to the hanger body via turnbuckles, enabling fine-tuning of the distance between the clamp and the hanger body, thereby allowing precise control of the force balance at each lifting point; the bottom fixed nylon block, the side movable nylon block, and the top movable nylon block set inside the hollow metal frame constitute a three-point adjustable clamping structure, wherein the bottom fixed nylon block has a contour surface adapted to the shape of the superconducting coil clamping point, and the side and top nylon blocks can be adjusted in position by adjusting bolts. This structure allows the same clamp to adapt to the clamping requirements of superconducting coils with different cross-sectional shapes and sizes, avoiding the repeated investment of customizing clamps for each type of coil, and significantly reducing manufacturing costs and tooling management complexity; 4) By setting a special-shaped hanger on the hanger body that matches the contour of the external structural components of the superconducting coil, the present invention enables the special-shaped hanger to serve as an auxiliary support point to provide multi-point balanced support for the superconducting coil during the process after the external structural components are installed. This effectively disperses the stress at the connection between the coil and the external structural components during the hoisting process, avoids local deformation of the superconducting coil and damage to the internal conductor caused by concentrated force at a single point or a few points, and further ensures the manufacturing quality of the superconducting coil. 5) In the hoisting method of the present invention, the three-step operation of "no-load leveling - coil clamping - center of gravity compensation" is combined with the installation requirement that the coil clamp is perpendicular to the ground to ensure that the force on each hoisting point is vertically upward. This forms a complete, standardized and repeatable hoisting operation process. This method is not only applicable to the multiple hoisting of the same superconducting coil between different processes, but also allows for quick adjustment of the hoisting frame configuration according to different models and sizes of superconducting coils. It has good versatility and promotion and application value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram showing the hoisting process during intermediate manufacturing of a superconducting coil; Figure 3 This is a schematic diagram of the coil clamp structure; Figure 4 This is a schematic diagram of the center of gravity adjustment device; Reference numerals: 100, Adjustable steel wire cable; 200, Hanger body; 300, Coil clamp; 310, Turnbuckle; 320, Metal frame; 330, Bottom fixed nylon block; 340, Side movable nylon block; 350, Top movable nylon block; 360, Hollow cavity; 400, Irregularly shaped hanger; 500, Center of gravity adjustment device; 510, Base plate; 520, Tie rod; 530, Limiting rod; 540, Counterweight; 550, Roller; 560, Upper limit plate; 570, Locking fastener; 580, Lower limit plate; 590, Top plate; 600, Superconducting coil; 610, Superconducting magnet coil winding; 620, External structural component of superconducting coil. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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 this invention.

[0019] It should be noted that the parts not described in the following embodiments of the present invention, such as the specific type of lifting equipment (e.g., bridge crane, gantry crane, truck crane, etc.), the specific material and specifications of the adjustable steel wire cable, the specific model of the turnbuckle, etc., are all considered to be prior art known or should be known by those skilled in the art. The present invention does not make specific limitations in this regard. Those skilled in the art can make reasonable selections and configurations according to the actual working conditions and the weight class of the superconducting coil.

[0020] Furthermore, the "superconducting coil" described in this invention has different structural compositions under different manufacturing processes. During the winding forming and vacuum pressure impregnation stages, the superconducting coil mainly exhibits a superconducting magnet coil winding 610 (e.g., Figure 2 As shown), this is the bare winding state before the installation of external structural components; after the installation of external structural components 620 such as the terminal box, the superconducting coil 600 presents a complete assembly state (as shown). Figure 1 As shown in the figure, the center of gravity of the coil will shift significantly relative to the bare winding state.

[0021] Example 1

[0022] A modular hoisting device for superconducting coils used in nuclear fusion, such as Figures 1 to 4 As shown, the system includes a gantry body 200 connected to lifting equipment via an adjustable steel wire cable 100. The gantry body 200 is a high-strength metal frame structure, generally rectangular or I-shaped, with sufficient rigidity and strength to support the weight of the superconducting coil 600. One end of the adjustable steel wire cable 100 is connected to the hook of the lifting equipment, and the other end is distributed into multiple branch steel wire cables, which are respectively connected to multiple connection points of the gantry body 200 (such as symmetrically distributed at the four corners or both sides) to ensure the balanced force and posture of the gantry body 200 during the lifting process.

[0023] The hanger body 200 is vertically equipped with several coil clamps 300 that are connected to the superconducting coil 600. The coil clamps 300 are spaced apart along the length (i.e., horizontal direction) of the hanger body 200, and their number is determined according to the size and weight of the superconducting coil 600, typically 4, 6, or 8. Each coil clamp 300 extends vertically downward from the hanger body 200, and its lower end is fixedly connected to the corresponding lifting point of the superconducting coil 600 (such as a lifting lug or clamping part on the coil frame), so that the superconducting coil 600 is suspended below the hanger body 200.

[0024] The hanger body 200 is also equipped with several movable center-of-gravity adjustment devices 500. There are typically multiple center-of-gravity adjustment devices 500, located on both sides of the hanger body 200 or at different positions on the crossbeams of the hanger body 200. Each center-of-gravity adjustment device 500 has a counterweight 540, which is made of high-density metal material (such as cast iron, lead blocks, or a composite of steel plates) and has sufficient weight per unit volume to achieve effective center-of-gravity compensation.

[0025] By changing the position of the center-of-gravity adjustment device 500 on the hanger body 200 along its length, the overall center position of the superconducting coil 600 combined with the hanger body 200 in different states (i.e., different manufacturing stages) can always be kept on the same vertical line as the lifting point (i.e., the center of the lifting hook of the lifting equipment or the convergence point of the adjustable steel wire cable 100). Specifically, when the superconducting coil 600 is in a bare winding state (e.g., ... Figure 2 When the superconducting coil 600 is installed with the external structural component 620 (as shown), its center of gravity is close to the geometric center of the coil; when the superconducting coil 600 is installed with the external structural component 620 (as shown), its center of gravity is close to the geometric center of the coil. Figure 1 As shown), its center of gravity will shift to the side where the external structural member 620 is located. At this time, by moving the center of gravity adjustment device 500 in the opposite direction of the center of gravity shift (i.e., moving it away from the external structural member), the counterweight block 540 generates a reverse torque to counteract the center of gravity shift caused by the external structural member 620, thereby returning the overall center of gravity to directly below the lifting point.

[0026] Furthermore, the adjustable steel wire cable 100 is connected to the lifting equipment via turnbuckles (not shown in the figure). The turnbuckles can adjust the effective length of the steel wire cable. By adjusting the tension of each branch steel wire cable, the lifting frame body 200 can be precisely leveled when lifted under no-load (i.e., without the superconducting coil 600 connected). This "no-load leveling" operation is the basis for ensuring balanced force on each lifting point during subsequent loaded lifting.

[0027] In this embodiment, a special-shaped hanger 400 is also provided on the hanger body 200. This special-shaped hanger 400 is a custom-shaped metal frame adapted to the contour of the external structural component 620 of the superconducting coil, and its shape is customized according to the specific shape of the external structural component 620. The special-shaped hanger 400 is fixedly connected to the lower part or side of the hanger body 200, and is used when lifting the superconducting coil 600 with the external structural component 620 installed (e.g., Figure 1 As shown, the irregular-shaped hanger 400 can provide auxiliary support and bearing for the external structural component 620 of the superconducting coil from below or the side, thereby achieving multi-point balanced bearing of the superconducting coil 600 and effectively dispersing the stress at the connection points of the internal and external structural components of the coil during the lifting process.

[0028] Example 2

[0029] Based on Embodiment 1, this embodiment provides a detailed description of the specific structure of the center of gravity adjustment device 500 and explains its position adjustment and locking methods: like Figure 1 and Figure 4 As shown, the center of gravity adjustment device 500 includes a base plate 510 and a top plate 590 connected by several tie rods 520. Both the base plate 510 and the top plate 590 are flat structures, arranged parallel to each other in the vertical direction. The tie rods 520 are vertically arranged round or square rods, typically four in number, positioned at the four corners of the base plate 510 and the top plate 590. The bottom of each tie rod 520 is fixedly connected to the base plate 510 (e.g., by welding or threaded connection), and the top passes through a corresponding through hole in the top plate 590 and is secured with a nut, thereby fixing the base plate 510 and the top plate 590 together to form an integral frame.

[0030] At least two limiting rods 530 are provided on the base plate 510, extending through and above the top plate 590. Each limiting rod 530 is a vertically arranged round rod, its bottom fixedly connected to the upper surface of the base plate 510, its middle passing through a corresponding through hole on the top plate 590, and its top extending to a certain height above the upper surface of the top plate 590. Preferably, there are two limiting rods 530, symmetrically arranged on both sides of the base plate 510 and the top plate 590. The counterweight 540 is fitted onto the limiting rods 530 and slides with them, with the entire counterweight 540 positioned on the upper surface of the top plate 590. Specifically, the counterweight 540 has through holes corresponding to the position and diameter of the limiting rods 530. The counterweight 540 is fitted onto the limiting rods 530 through these through holes and can be freely placed or removed vertically under the guidance of the limiting rods 530. The position of the counterweight 540 on the top plate 590 can be adjusted by sliding along the limiting rod 530 to fine-tune its position relative to the overall center of gravity of the center of gravity adjustment device 500.

[0031] Two upper limit plates 560 are symmetrically distributed on the lower surface of the top plate 590. Both upper limit plates 560 are vertically downward extending plate-like structures, and the lateral distance between them matches the width of the hanger body 200, placing the two upper limit plates 560 on opposite lateral sides of the hanger body 200. A roller 550 is positioned between the two upper limit plates 560, rolling on the upper surface of the hanger body 200. The roller 550 is mounted at the top position between the two upper limit plates 560 via an axle, and its wheel surface contacts the upper surface of the hanger body 200. When the center of gravity adjustment device 500 needs to move along the length of the hanger body 200, the operator pushes the entire center of gravity adjustment device 500, causing the roller 550 to roll on the upper surface of the hanger body 200, significantly reducing movement resistance and making the position adjustment process of the center of gravity adjustment device 500 easy and precise.

[0032] The two upper limit plates 560 are equipped with locking fasteners 570 that press against the sides of the hanger body 200. The locking fasteners 570 are preferably tightening bolts, with their threads passing through threaded holes on the upper limit plates 560, and a pressure washer or nylon pressure head fixedly attached to their ends (i.e., the end facing the hanger body 200). When the center of gravity adjustment device 500 moves to the target position, the locking fasteners 570 are tightened, causing their ends to press tightly against the side of the hanger body 200. Friction is used to lock the center of gravity adjustment device 500 in this position, preventing it from slipping due to vibration or tilting during lifting.

[0033] The upper surface of the base plate 510 is provided with two lower limit plates 580 corresponding to the upper limit plate 560. The lower limit plates 580 are also vertically upward-extending plate-like structures, respectively located on both sides of the hanger body 200 and below it. The upper limit plate 560 and the lower limit plates 580 together cover the sides of the hanger body 200 from both above and below, ensuring the vertical positioning accuracy of the center of gravity adjustment device 500 on the hanger body 200 and preventing the center of gravity adjustment device 500 from shifting vertically or detaching from the hanger body 200 during lifting due to wire cable skewing or inertial forces.

[0034] Based on the above structure, the installation, adjustment, and locking process of the center of gravity adjustment device 500 is as follows: First, the entire center of gravity adjustment device 500 is inserted into one end of the hanger body 200, so that the roller 550 rests on the upper surface of the hanger body 200. At the same time, two upper limit plates 560 are clamped on both sides of the hanger body 200, and two lower limit plates 580 are located on both sides below the hanger body 200. Then, according to the current center of gravity position of the superconducting coil 600, the center of gravity adjustment device 500 is pushed to move along the hanger body 200 to the target position. The rolling of the roller 550 makes the movement effortless and smooth. After reaching the target position, the locking fastener 570 is tightened so that its end presses against the side of the hanger body 200 to complete the locking. Then, the counterweight 540 is placed on the top plate 590, and the position of the counterweight 540 on the top plate 590 is finely adjusted along the limit rod 530 according to the actual center of gravity deviation to achieve precise center of gravity matching.

[0035] Example 3

[0036] Based on Embodiment 1 or Embodiment 2, this embodiment provides a detailed description of the specific structure of the coil clamp 300 and explains its clamping and connection method with the superconducting coil 600.

[0037] like Figure 3 As shown, the coil clamp 300 includes a hollow metal frame 320 connected to the hanger body 200 via turnbuckles 310. The upper end of the turnbuckle 310 (i.e., the end closest to the hanger body 200) is fixedly connected to or hinged to the hanger body 200, and the lower end (i.e., the end closest to the hollow metal frame 320) is fixedly connected to the top of the hollow metal frame 320. By rotating the middle adjusting nut of the turnbuckle 310, the effective length of the turnbuckle 310 can be precisely adjusted, thereby adjusting the vertical suspension height of the coil clamp 300 relative to the hanger body 200. This allows for independent fine-tuning of the clamp height at each suspension point, ensuring that all coil clamps 300 are evenly stressed after connecting the superconducting coil 600.

[0038] The hollow metal frame 320 is a hollow metal frame structure with a hollow cavity 360 inside. The cross-sectional shape and size of the hollow cavity 360 are designed according to the shape of the clamping point of the superconducting coil 600, and are usually rectangular or rectangular with rounded corners. A bottom-fixed nylon block 330, a side-movable nylon block 340, and a top-movable nylon block 350 are disposed within the hollow cavity 360 of the metal frame 320. The bottom-fixed nylon block 330 is fixedly installed on the bottom wall of the hollow cavity 360, and its position is not adjustable. The bottom-fixed nylon block 330 has a contour surface adapted to the shape of the clamping point of the superconducting coil 600. Specifically, the profile surface is machined according to the shape of the outer surface of the superconducting coil 600 at the clamping position. For example, if the clamping point of the superconducting coil 600 is cylindrical, the profile surface of the bottom fixing nylon block 330 is a concave arc surface; if the clamping point is a lifting lug with a rectangular cross-section, the profile surface is a plane or a plane with a positioning groove. Through this adaptive profile surface design, the bottom fixing nylon block 330 can form surface contact with the outer surface of the superconducting coil 600, effectively avoiding excessive local compressive stress and damage to the coil insulation layer caused by point contact or line contact.

[0039] A movable nylon block 340 is disposed on the side wall of the hollow cavity 360 and its position is adjusted by adjusting bolts (not shown in the figure). Specifically, one or more adjusting bolts are fixedly connected to the outer side of the movable nylon block 340 (i.e., the side away from the center of the hollow cavity 360). The adjusting bolts pass through threaded holes on the side wall of the metal frame 320 and extend to the outside of the metal frame 320. By rotating the adjusting bolts, the movable nylon block 340 can be driven to move closer to or further away from the center of the hollow cavity 360 in the horizontal direction, thereby accommodating clamping points of superconducting coils 600 with different widths.

[0040] The top movable nylon block 350 is disposed on the top wall of the hollow cavity 360, and its position is also adjusted by an adjusting bolt (not shown in the figure). An adjusting bolt is fixedly connected to the top of the top movable nylon block 350, which passes through a threaded hole on the top wall of the metal frame 320 and extends to the outside of the metal frame 320. By rotating the adjusting bolt, the top movable nylon block 350 can be driven to move downward in the vertical direction, pressing the clamping point of the superconducting coil 600 from above.

[0041] In actual clamping operation, firstly, based on the dimensions of the clamping point of the superconducting coil 600, the effective width of the hollow cavity 360 is pre-adjusted using the adjusting bolts of the side movable nylon block 340, making it slightly larger than the width of the clamping point of the superconducting coil 600. Then, the clamping point of the superconducting coil 600 is placed into the hollow cavity 360 from below or the side, placing it on the contour surface of the bottom fixed nylon block 330. Next, the adjusting bolts of the side movable nylon block 340 are tightened, causing the side movable nylon block 340 to clamp the superconducting coil 600 from the side. Finally, the adjusting bolts of the top movable nylon block 350 are tightened, causing the top movable nylon block 350 to press the superconducting coil 600 from above. Through the coordinated operation of the bottom fixed nylon block 330, the side movable nylon block 340, and the top movable nylon block 350, stable clamping of the clamping point of the superconducting coil 600 is achieved.

[0042] The aforementioned bottom fixed nylon block 330, side movable nylon block 340, and top movable nylon block 350 are all made of nylon material, which has appropriate hardness and good wear resistance. At the same time, it has lower hardness compared to metal materials, effectively protecting the insulating layer on the surface of the superconducting coil 600 from scratches and pressure damage. Furthermore, nylon material also has a certain degree of elastic deformation capability, allowing it to adapt to dimensional fluctuations at the clamping point through slight deformation during clamping, achieving an adaptive and tight fit.

[0043] Example 4

[0044] Based on the modular hoisting device for superconducting coils used in nuclear fusion described in the above embodiments, this embodiment provides a method for modular hoisting of superconducting coils used in nuclear fusion, which includes the following steps: 1) Fabricate a hanger body 200 and a special-shaped hanger 400 that match the outline of the superconducting coil 600, and ensure that the hanger body 200 is in a horizontal state when lifted under no-load. Specifically, firstly, based on the overall dimensions and weight of the superconducting coil 600, a hanger body 200 with sufficient strength and rigidity is designed and manufactured. The structural form of the hanger body 200 (such as a rectangular frame, an I-beam frame, or a triangular frame) is determined according to the planar projection shape of the superconducting coil 600. Simultaneously, based on the specific shape of the external structural component 620 of the superconducting coil, a non-standard hanger 400 is designed and manufactured. A gap is left between the contour surface of the non-standard hanger 400 and the outer surface of the external structural component 620 to facilitate smooth insertion and removal during lifting. After the hanger body 200 is manufactured, it is connected to the lifting equipment via an adjustable steel wire cable 100. The length of the adjustable steel wire cable 100 is finely adjusted using turnbuckles. After multiple lifts to a certain height above the ground, the height difference of each corner point of the hanger body 200 is measured. This process is repeated until the hanger body 200 is precisely level when lifted under no-load conditions. 2) Use coil clamp 300 to connect the superconducting coil 600 to the hanger body 200; Specifically, based on the current manufacturing process status of the superconducting coil 600, it is determined that the superconducting magnet coil winding 610 in its bare winding state needs to be lifted (e.g., ...). Figure 2 (As shown) or a complete superconducting coil 600 with external structural components 620 already installed (as shown) Figure 1 (As shown). Align each lifting point of the superconducting coil 600 (such as the lifting lugs on the coil frame, the clamping parts at the winding ends, or the lifting points on the external structural components) with the corresponding coil clamps 300. During the connection process, first place the clamping points of the superconducting coil 600 into the hollow cavity 360 of the hollow metal frame 320, and complete the clamping and fixing of the clamping points by adjusting the side movable nylon blocks 340 and the top movable nylon blocks 350. After the connection is completed, it is necessary to ensure that each coil clamp 300 is perpendicular to the ground (i.e., extends in the vertical direction), so as to ensure that the tension on each lifting point of the superconducting coil 600 is vertically upward, and avoid the horizontal component force generated by the oblique tension from causing additional bending moment and deformation to the superconducting coil 600. For the superconducting coil 600 with the external structural component 620 installed, it is also necessary to make auxiliary connections between the special-shaped hanger 400 and the corresponding parts of the external structural component 620 so that the special-shaped hanger 400 bears part of the load; 3) Several movable center of gravity adjustment devices 500 are set on the hanger body 200. Each center of gravity adjustment device 500 has a counterweight 540. By changing the position of the center of gravity adjustment device 500 on the hanger body 200, the center position of the superconducting coil 600 is always consistent with the lifting point under different states. Specifically, based on the current manufacturing process of the superconducting coil 600, the overall center of gravity position of the superconducting coil 600 (including or excluding the external structural component 620) combined with the hanger body 200 is calculated or measured. The position of the center of gravity adjustment device 500 on the hanger body 200 is moved until the overall center of gravity is on the same vertical line as the lifting point. During the movement, the rollers 550 are used to roll on the upper surface of the hanger body 200 to achieve effortless displacement. After reaching the target position, the center of gravity adjustment device 500 is locked using the fasteners 570. During this process, the counterweight 540 can be placed on the top plate 590 in advance, or it can be increased or decreased according to the overall weight and position of the center of gravity adjustment device 500, or finely adjusted along the limit rod 530. After completing the above steps, the formal lifting can begin.

[0045] As a further optimization of this method, in step 2), when connecting the superconducting coil 600 to the hanger body 200 using the coil clamps 300, it is necessary to ensure that the tightness of the turnbuckles 310 of each coil clamp 300 is consistent. Specifically, a torque wrench can be used to apply the same preload torque to each turnbuckle 310, and the uniformity of force can be verified by measuring the verticality of each coil clamp 300. If a coil clamp 300 is tilted (i.e., not perpendicular to the ground), it can be corrected by finely adjusting the length of its corresponding turnbuckle 310 until all coil clamps 300 are in a vertical state.

[0046] Application Examples This embodiment provides a specific application example of the above-described hoisting device and method in the manufacturing process of the "tile-shaped" correction field coil of a tokamak device.

[0047] In this application example, the manufacturing of superconducting coil 600 mainly involves two key process stages: The first state is the superconducting magnet coil winding 610 state. In this state, the superconducting coil 600 has just completed winding and vacuum pressure impregnation, and no external structural components have been installed. At this time, the superconducting coil 600 has a relatively regular shape, and its center of gravity is located near the geometric center of the coil. During hoisting... Figure 2 The lifting module shown is used only, that is, only the hanger body 200 and the coil clamp 300 are used, without installing the special-shaped hanger 400 and the center of gravity adjustment device 500 (or the center of gravity adjustment device 500 is in the initial zero position).

[0048] The second state is the complete superconducting coil 600 state after the installation of external structural components 620, such as the terminal box, junction box, and support base. In this state, because the installation position of the external structural components 620 (including the terminal box, junction box, and support base) is biased towards one end of the superconducting coil 600, the overall center of gravity of the superconducting coil 600 is shifted by approximately 740mm towards the direction of the external structural components 620 compared to the state of the superconducting magnet coil winding 610. If the hoisting method of the first state is continued, an eccentricity of approximately 740mm will be generated, causing the superconducting coil 600 to swing and tilt violently at the moment of hoisting. This not only poses a significant safety hazard but also causes the local stress of the coil to exceed the allowable value due to the off-center load. Therefore, a method is adopted... Figure 1The lifting module shown is used for lifting: a center of gravity adjustment device 500 is installed on the lifting frame body 200, and the center of gravity adjustment device 500 is moved a suitable distance in the opposite direction to the direction of the external structural component 620 (in this example, the moving distance is about 550mm~650mm). At the same time, the remaining center of gravity deviation is further compensated by the counterweight block 540, so that the deviation between the overall center of gravity and the lifting point in the final lifting state is controlled within ±5mm. Actual measurement verification shows that after using the lifting device and method of the present invention, the maximum deviation of the superconducting coil 600 profile before and after lifting is only 0.74mm, which fully meets the high precision requirements of nuclear fusion superconducting coil manufacturing.

[0049] The above results show that the modular hoisting device and method provided by the present invention can effectively adapt to the changes in the center of gravity of the superconducting coil under different manufacturing process conditions. High-precision center of gravity compensation can be achieved by simply adjusting the position of the counterweight. Thus, while ensuring hoisting safety, the coil deformation generated during hoisting is controlled within a very small range, providing reliable tooling guarantee for the high-quality manufacturing of nuclear fusion superconducting coils.

Claims

1. A modular hoisting device for superconducting coils used in nuclear fusion, comprising a gantry body (200) connected to a hoisting device via an adjustable steel wire cable (100), and wherein a plurality of coil clamps (300) connected to superconducting coils (600) are vertically arranged on the gantry body (200), characterized in that: The hanger body (200) is provided with several center of gravity adjustment devices (500) that can move on it. Each center of gravity adjustment device (500) has a counterweight (540). By changing the position of the center of gravity adjustment device (500) on the hanger body (200), the center position of the superconducting coil (600) in different states is always consistent with the lifting point.

2. The modular hoisting device for superconducting coils used in nuclear fusion according to claim 1, characterized in that: The center of gravity adjustment device (500) includes a base plate (510) and a top plate (590) connected by several tie rods (520). At least two limiting rods (530) are provided on the base plate (510) and extend through and above the top plate (590). The counterweight (540) is slidably engaged with the limiting rods (530) and is located on the upper surface of the top plate (590). Two upper limit plates (560) are symmetrically distributed on the lower surface of the top plate (590). The two upper limit plates (560) are located on both sides of the hanger body (200). A roller (550) that rolls on the upper surface of the hanger body (200) is provided between the two upper limit plates (560).

3. The modular hoisting device for superconducting coils used in nuclear fusion according to claim 2, characterized in that: The two upper limit plates (560) are provided with locking fasteners (570) that press against the side of the hanger body (200).

4. A modular hoisting device for superconducting coils used in nuclear fusion according to claim 2, characterized in that: The upper surface of the base plate (510) is provided with two lower limit plates (580) corresponding to the upper limit plate (560).

5. A modular hoisting device for superconducting coils used in nuclear fusion according to claim 1, characterized in that: The coil clamp (300) includes a hollow metal frame (320) connected to the hanger body (200) by turnbuckles (310). A bottom fixed nylon block (330), a side movable nylon block (340) and a top movable nylon block (350) are provided in the hollow cavity (360) of the metal frame (320). The side movable nylon block (340) and the top movable nylon block (350) can adjust their positions by adjusting bolts and clamp the superconducting coil (600) together with the bottom fixed nylon block (330).

6. A modular hoisting device for superconducting coils used in nuclear fusion according to claim 5, characterized in that: The bottom fixing nylon block (330) has a contour surface adapted to the shape of the clamping point of the superconducting coil (600).

7. A modular hoisting device for superconducting coils used in nuclear fusion according to claim 1, characterized in that: The hanger body (200) is provided with a special-shaped hanger (400), and the special-shaped hanger (400) is a special-shaped metal frame that is adapted to the contour of the external structural component (620) of the superconducting coil.

8. A modular hoisting device for superconducting coils used in nuclear fusion according to claim 1, characterized in that: The adjustable steel wire cable (100) is connected to the lifting equipment by turnbuckles, and the gantry body (200) is in a horizontal state when unloaded.

9. A modular hoisting method for superconducting coils used in nuclear fusion, characterized in that, Includes the following steps: 1) Fabricate a hanger body (200) and a special-shaped hanger (400) that match the outline of the superconducting coil (600), and ensure that the hanger body (200) is in a horizontal state when lifted under no-load; 2) Use the coil clamp (300) to connect the superconducting coil (600) to the hanger body (200); 3) Several movable center of gravity adjustment devices (500) are set on the hanger body (200). Each center of gravity adjustment device (500) has a counterweight (540). By changing the position of the center of gravity adjustment device (500) on the hanger body (200), the center position of the superconducting coil (600) is always consistent with the lifting point under different states.

10. A modular hoisting method for superconducting coils used in nuclear fusion according to claim 9, characterized in that: In step 2), when the superconducting coil (600) is connected to the hanger body (200) using the coil clamp (300), the coil clamp (300) is perpendicular to the ground to ensure that the force at each suspension point of the superconducting coil (600) is vertically upward.

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