A superconducting magnet positioning and assembling device suitable for magnetic control crystal pulling

Abstract

The application provides a superconducting magnet positioning and assembling device suitable for magnetron pulling crystal, which comprises a base and a plurality of radial telescopic structures. The base comprises a first support and a second support. The second support is arranged at the middle part of the first support, and the upper end surface of the first support is higher than that of the second support. The first support and the second support are used for stably supporting the components placed thereon when assembling the coil assembly and the shell, so as to prevent the components from shaking during the assembling process. The plurality of radial telescopic structures are arranged on the upper end surface of the first support and are arranged on the outer circumferential side of the coil assembly along the circumferential direction of the coil assembly. The abutting surface of each radial telescopic structure pushes the second part of the coil assembly or the shell, so that the second part of the coil assembly or the shell moves on the upper end surface of the first support, and the axis of the coil assembly or the second part coincides with the axis of the first part, so as to realize the purpose of accurately adjusting the coaxiality of the components.

Description

Technical Field

[0001] This invention relates to the field of superconducting magnet technology, and in particular to a superconducting magnet positioning and assembly device suitable for magnetically controlled crystal pulling. Background Technology

[0002] Magnetic-field applied Czochralski (MCZ) superconducting magnet systems offer advantages such as high magnetic field strength, low energy consumption, high stability, and compact lightweight design. They can generate a high-intensity, uniform magnetic field in a Czochralski single-crystal furnace, suppressing thermal convection of molten silicon through Lorentz force to produce high-quality, large-size single-crystal silicon. The core component of the MCZ superconducting magnet is a coil assembly made of superconducting material (such as NbTi). This coil assembly is located at the center of the system, surrounded by a thermal insulation component. The coil assembly itself resides within a sealed cavity inside the thermal insulation component, and both components must be coaxially assembled and fixedly connected.

[0003] In the existing technology, cranes are used for suspended installation when assembling magnets pulled by magnetic control. However, the superconducting magnet system is large in size and weight, and the hoisting height is relatively high. Therefore, the method of hoisting by crane alone has technical problems such as poor hoisting stability, difficulty in positioning during assembly, and difficulty in ensuring accurate coaxiality. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems of poor hoisting stability, difficulty in positioning during assembly, and difficulty in ensuring accurate coaxiality when assembling superconducting magnet systems by relying solely on crane hoisting in the prior art.

[0005] To solve the above-mentioned technical problems, embodiments of the present invention provide a superconducting magnet positioning and assembly device suitable for magnetically controlled crystal pulling. The superconducting magnet includes a coil assembly and a shell. The shell includes an inner shell cylinder, an outer shell cylinder, an upper shell cap, and a lower shell cap. The outer shell cylinder is spaced outside the inner shell cylinder. The upper shell cap is fixedly connected between the upper end of the inner shell cylinder and the upper end of the outer shell cylinder. The lower shell cap is fixedly connected between the lower end of the inner shell cylinder and the lower end of the outer shell cylinder, so that the inner shell cylinder, the upper shell cap, the outer shell cylinder, and the lower shell cap together form a closed first chamber. The coil assembly is fixedly connected to the upper shell cap to be suspended in the first chamber. The fixedly connected inner shell cylinder and the upper shell cap constitute the first part of the shell, and the fixedly connected outer shell cylinder and the lower shell cap constitute the second part of the shell. The positioning and assembly device includes a base, which includes a first support and a second support. The second support is disposed in the middle of the first support, and the upper end surface of the first support is higher than that of the second support. The upper end face of the first bracket is used to support the coil assembly or the lower end cover of the shell, and the upper end face of the second bracket is used to support the inner shell cylinder. Multiple radial telescopic structures are disposed on the upper end face of the first bracket and spaced circumferentially around the outer periphery of the coil assembly. Each radial telescopic structure has an abutment surface that can move radially towards or away from the coil assembly. The abutment surface abuts against the outer periphery of the coil assembly or the outer periphery of the shell to restrict movement of the coil assembly or the shell on the upper end face of the first bracket. When the inner shell cylinder of the first part is placed on the upper end face of the second bracket, the upper end cover of the shell and the coil assembly are fixedly connected by multiple tie rods. When the lower end cover of the second part is placed on the upper end face of the first bracket, the first part and the coil assembly are hoisted to a position where the lower end of the inner shell cylinder aligns with the lower end cover of the shell, and the inner shell cylinder and the lower end cover, as well as the outer shell cylinder and the upper end cover of the shell, are fixedly connected.

[0006] Using the above technical solution, the base provides stable support for the components (coil assembly, lower end cap, and inner shell cylinder) placed on it during the assembly of the coil assembly and housing, preventing the components from shaking during assembly and affecting safety and assembly accuracy. Specifically, the center lines of the first and second supports of the base coincide. When the coil assembly or lower end cap is placed on the first support, the contact surface of each radial telescopic structure pushes the second part of the coil assembly or housing, causing the second part of the coil assembly or housing to move on the upper end face of the first support, so that the axis of the coil assembly or second part coincides with the axis of the first part (including the inner shell cylinder and upper end cap). When the inner shell cylinder is placed on the upper end face of the second support, the axis of the inner shell cylinder coincides with the center line of the first support (i.e., coincides with the axis of the coil assembly or lower end cap), thereby achieving the purpose of precisely adjusting the coaxiality of each component. Therefore, the method of placing the coil assembly, lower end cap, and inner shell cylinder on the base to ensure stable support before assembling the coil assembly and housing coaxially is more stable and has higher coaxial accuracy than the method of relying entirely on hoisting assembly.

[0007] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the present invention includes a fixed block, an adjusting rod, and an adjusting block in each radial telescopic structure. The fixed block is fixed to the upper end face of the first support, and a through hole is formed on the fixed block that penetrates the fixed block radially along the coil assembly. The adjusting block is arranged radially on the inner side of the fixed block along the coil assembly, and the inner side of the adjusting block away from the fixed block forms an abutment surface. The adjusting rod is movably inserted into the through hole along the extension direction of the through hole and is threadedly connected to the adjusting block. When the adjusting rod rotates in the through hole, it drives the adjusting block to move radially relative to the fixed block along the coil assembly.

[0008] The superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the embodiments of the present invention further includes a plurality of guide structures spaced apart in the radial telescopic structure. Each guide structure is disposed between the adjusting block and the fixed block to guide the adjusting block to move radially relative to the fixed block along the coil assembly. The adjusting rod is a fastener, which includes a smooth rod portion and a threaded portion connected sequentially along its length direction. The smooth rod portion is rotatably inserted into the through hole. The adjusting block is provided with a threaded hole, and the threaded portion is threadedly connected to the threaded hole of the adjusting block to drive the adjusting block to move by rotating the fastener.

[0009] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the present invention includes a first support comprising a rectangular frame structure, the upper surface of the frame structure along its height direction forming the upper end surface of the first support, the frame structure being supported on a support surface, and a plurality of radially telescopic structures being respectively disposed at the four corners of the frame structure; the second support is a circular support ring.

[0010] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the present invention has a stepped portion on the inner circumference of the support ring. The stepped surface of the stepped portion facing the lower end face of the inner cylinder can be adapted to the lower end face of the inner cylinder. The stepped surface of the stepped portion facing the side wall of the inner cylinder can be adapted to the side wall of the inner cylinder. Furthermore, a guide slope is formed at the upper end of the stepped portion, and a buffer pad is provided on the stepped portion.

[0011] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in this embodiment further includes a thermal radiation shielding component disposed in a first chamber, comprising an inner shielding component and an outer shielding component. The inner shielding component includes an inner shielding cylinder and an upper shielding cap fixedly connected to the upper end of the inner shielding cylinder and protruding radially outward along the inner shielding cylinder. The outer shielding component includes an outer shielding cylinder and a lower shielding cap fixedly connected to the lower end of the outer shielding cylinder and protruding radially inward along the outer shielding cylinder. The inner shielding cylinder, the upper shielding cap, the outer shielding cylinder, and the lower shielding cap together form a closed second chamber. The coil assembly is fixedly connected to the upper shielding cap to be suspended in the second chamber. The upper end face of the first bracket is also used to support the lower shielding cap, and the upper end face of the second bracket is also used to support the inner shielding cylinder. The assembly device also includes a lifting assembly connected to a second bracket. The lifting assembly can drive the second bracket to move relative to the first bracket in a first direction toward or away from the coil assembly, thereby limiting the movement of the inner shell cylinder or the inner shield cylinder in the axial direction of the coil assembly. The first direction is parallel to the height direction of the base and the axial direction of the coil assembly. When the inner shield cylinder is placed on the upper end face of the second bracket, the upper shield cover and the coil assembly are fixedly connected by multiple positioning posts. When the lower shield cover is placed on the upper end face of the first bracket, the inner shield component and the coil assembly are hoisted to the position where the lower end of the inner shield cylinder is aligned with the lower shield cover. The inner shield cylinder and the lower shield cover, and the outer shield cylinder and the upper shield cover are fixedly connected. When the inner shell cylinder of the first part is placed on the upper end face of the second bracket, the upper shell cover and the upper shield cover are fixedly connected by multiple tie rods.

[0012] Using the above technical solution, when the superconducting magnet includes a coil assembly, a shell, and a thermal radiation shield, the coaxiality between the three components needs to be adjusted during assembly. Placing the inner shielding cylinder on the upper surface of the second support and the coil assembly on the first support allows for coaxial fixation of the two components. Then, placing the inner shell cylinder on the second support ensures coaxial fixation of all three components. Therefore, this method of placing the coil assembly, lower shell cap, inner shell cylinder, inner shielding cylinder, and lower shielding cap on the base to ensure stable support before coaxial alignment and assembly of the coil assembly, shell, and thermal radiation shield is more stable and has higher coaxial accuracy than relying entirely on hoisting assembly.

[0013] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the present invention includes a lifting assembly comprising a screw and a threaded connection component. The screw extends along a first direction and its upper end is fixedly connected to a second bracket. The threaded connection component is sleeved on the outer periphery of the screw and threadedly connected to the screw. The threaded connection component is rotatably disposed on a first bracket about its axis, so that the rotation of the threaded connection component drives the screw and the second bracket to move in the first direction toward or away from the coil assembly. There are multiple lifting assemblies, and the multiple lifting assemblies are arranged circumferentially around the coil assembly.

[0014] Using the above technical solution, the lifting assembly can adjust the distance between the upper end face of the second bracket and the upper end face of the first bracket. That is, the height of the upper end face of the second bracket can be adjusted to a suitable position according to the assembly distance requirements between different components. For example, the height difference between the upper end face of the second bracket and the upper end face of the first bracket can be adjusted to be consistent with the height difference between the lower end cover of the shell and the bottom of the coil assembly, or to be consistent with the height difference between the lower end cover of the shell and the lower end cover of the shield, or to be consistent with the height difference between the lower end cover of the shield and the bottom of the coil assembly.

[0015] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the present invention further includes an outer rounding assembly. The outer rounding assembly is sleeved on the outer periphery of the outer shell cylinder. The outer rounding assembly includes an outer reinforcing ring and a plurality of outer legs spaced apart circumferentially along the outer reinforcing ring. A plurality of first connecting holes are opened on the outer reinforcing ring spaced apart circumferentially along the outer reinforcing ring. The plurality of outer legs and the plurality of first connecting holes correspond one-to-one. Each outer leg passes through a corresponding first connecting hole and is fixedly connected to the first connecting hole. The end of each outer leg near the inner periphery of the outer reinforcing ring is used to abut against the outer peripheral wall of the outer shell cylinder.

[0016] By adopting the above technical solution, the outer cylinder can be straightened by the outer rounding component, ensuring the regularity of the outer cylinder's shape and preventing deformation.

[0017] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the present invention includes an outer reinforcing ring comprising two semicircular rings that are abutted to each other along their circumference, the ends of the two semicircular rings being detachably fixedly connected to each other.

[0018] According to another specific embodiment of the present invention, the superconducting magnet positioning and assembly device for magnetically controlled crystal pulling disclosed in the present invention further includes an inner rounding component. The inner rounding component is embedded in the inner circumference of the inner cylinder. The inner rounding component includes an inner reinforcing ring and a plurality of inner legs spaced apart circumferentially along the inner reinforcing ring. A plurality of second connecting holes are provided on the inner reinforcing ring spaced apart circumferentially along the inner reinforcing ring. The plurality of inner legs and the plurality of second connecting holes correspond one-to-one. Each inner leg passes through a corresponding second connecting hole and is fixedly connected to the second connecting hole. The end of each inner leg near the outer circumference of the inner reinforcing ring is used to abut against the inner circumferential wall of the inner cylinder.

[0019] By adopting the above technical solution, the inner cylinder of the shell can be straightened by the inner rounding component, so as to ensure the regularity of the shape of the inner cylinder and prevent the inner cylinder from deforming.

[0020] The beneficial technical effects of this invention are as follows: This invention provides a superconducting magnet positioning and assembly device suitable for magnetron crystal pulling. The base provides stable support for the components (coil assembly, lower end cap, and inner cylinder) placed on it during the assembly of the coil assembly and the outer shell, preventing the components from shaking during assembly and affecting safety and assembly accuracy. The contact surface of each radial telescopic structure pushes the second part of the coil assembly or the outer shell, causing the second part of the coil assembly or the outer shell to move on the upper end face of the first support, so that the axis of the coil assembly or the second part coincides with the axis of the first part (including the inner cylinder and the upper end cap), thereby achieving the purpose of precisely adjusting the coaxiality of each component. Therefore, the method of placing the coil assembly, the lower end cap, and the inner cylinder on the base to ensure stable support before coaxial alignment assembly is more stable and has higher coaxial accuracy than the method of relying entirely on hoisting assembly. Attached Figure Description

[0021] Figure 1 A cross-sectional schematic diagram of a superconducting magnet for magnetically controlled crystal pulling and a positioning and assembly device for a superconducting magnet suitable for magnetically controlled crystal pulling provided in a specific embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a superconducting magnet for magnetically controlled crystal pulling and a positioning and assembly device for a superconducting magnet suitable for magnetically controlled crystal pulling provided in a specific embodiment of the present invention (the superconducting magnet for magnetically controlled crystal pulling includes a first part of the outer shell and an inner shielding component of the thermal radiation shielding component).

[0023] Figure 3 Another cross-sectional schematic diagram of a superconducting magnet for magnetically controlled crystal pulling and a positioning and assembly device for a superconducting magnet suitable for magnetically controlled crystal pulling provided in a specific embodiment of the present invention (the superconducting magnet for magnetically controlled crystal pulling includes a first part of the outer shell and an inner shielding component of the thermal radiation shielding component).

[0024] Figure 4 for Figure 3A magnified view of a portion of point A in the middle;

[0025] Figure 5 A schematic diagram of the structure of a superconducting magnet positioning and assembly device for magnetron crystal pulling, which is applicable to a specific embodiment of the present invention (including a base, a radial telescopic structure and a lifting assembly).

[0026] Figure 6 A schematic diagram of the outer circular component of a superconducting magnet positioning and assembly device suitable for magnetically controlled crystal pulling, provided for a specific embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the inner circular component of a superconducting magnet positioning and assembly device suitable for magnetized crystal pulling, provided for a specific embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Superconducting magnet;

[0030] 10. Coil assembly;

[0031] 11. Outer shell; 110. First part; 1100. Inner shell cylinder; 1101. Upper shell cap; 111. Second part; 1110. Outer shell cylinder; 1111. Lower shell cap; 112. First chamber;

[0032] 12. Thermal radiation shielding component; 120. Inner shielding component; 1200. Inner shielding cylinder; 1201. Upper shielding cap; 121. Outer shielding component; 1210. Outer shielding cylinder; 1211. Lower shielding cap; 122. Second chamber;

[0033] 2. Positioning and assembly device;

[0034] 20. Base;

[0035] 200. First support;

[0036] 201. Second support; 2010. Step section; 2011. Guide ramp; 2012. Buffer pad;

[0037] 21. Radial telescopic structure; 210. Fixing block; 211. Adjusting rod; 212. Adjusting block; 213. Guide structure;

[0038] 22. Lifting assembly; 220. Screw; 221. Threaded connection component;

[0039] 23. Positioning post;

[0040] 24. Outer circular assembly; 240. Outer reinforcing ring; 2400. First connecting hole; 241. Outer support leg;

[0041] 25. Inner circular assembly; 250. Inner reinforcing ring; 2500. Second connecting hole; 251. Inner support leg. Detailed Implementation

[0042] A magnetron-controlled crystal pulling superconducting magnet is an electromagnetic device that operates in a low-temperature environment. It consists of a coil system made of superconducting materials (such as NbTi) and can generate a high-intensity, uniform magnetic field in a magnetron-controlled Czochralski single crystal furnace. By suppressing thermal convection of molten silicon through the Lorentz force, it is a core piece of equipment for achieving high-quality, large-size single-crystal silicon growth. The core component of the magnetron-controlled crystal pulling superconducting magnet is the coil assembly made of superconducting materials (such as NbTi). The thermal insulation component located around the coil assembly significantly reduces heat radiation from the external environment to the coil assembly, while also providing support, sealing, interface, and safety protection.

[0043] Currently, most magnetically controlled crystal pulling superconducting magnets are assembled using overhead cranes. Large-sized magnetically controlled crystal pulling superconducting magnets can weigh up to 10 tons and are hoisted at a height of 5-8 meters. The overall center of gravity is high, and the suspension method has problems with poor stability and extremely high safety risks. During assembly, it is difficult to position the coil assembly and the external heat insulation protection assembly, and it is difficult to ensure accurate coaxiality. This leads to the risk of breakage of the tie rod connecting the coil assembly and the heat insulation protection assembly when the entire superconducting magnet is lifted after assembly.

[0044] This invention provides a superconducting magnet positioning and assembly device suitable for magnetron crystal pulling. It assists in the assembly of coil assemblies and housings of superconducting magnets, specifically by using a crane in conjunction with the positioning and assembly device to complete the assembly of the superconducting magnet. The positioning and assembly device includes a base and multiple radially telescopic structures. A first and second bracket on the base provide stable support for the components placed on it. The radially telescopic structures push the coil assembly or the lower end cover of the housing, causing it to move on the upper surface of the first bracket, thereby achieving precise adjustment of the coaxiality of the components.

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0046] Example 1

[0047] This embodiment provides a superconducting magnet positioning and assembly device suitable for magnetically controlled crystal pulling. It is used in conjunction with a hoisting device to position and assemble a superconducting magnet. First, the structure of the superconducting magnet in this embodiment (the overall structure after assembly) is described, such as... Figures 1-3As shown, the superconducting magnet 1 includes a coil assembly 10 and a shell 11. The coil assembly 10 includes a superconducting coil and a related support structure (coil frame). The superconducting coil is wound on the coil frame. The coil assembly 10 operates in an extremely low temperature environment (4.2K). The coil assembly 10 is a key component in maintaining the zero-resistance characteristics of the superconducting material. The coil assembly 10 has a hollow columnar structure, and its axial direction ( Figures 1-3 The z-direction of the middle part has two ends along its radial direction ( Figures 1-3 The flanges (i.e., the end plates of the coil frame) protrude outward in the x direction of the coil assembly 10. The flanges at both ends of the coil assembly 10 in the axial direction are used to block the coil and are fixedly connected to the housing 11.

[0048] The outer shell 11 refers to a hollow shell structure that operates at room temperature (approximately 293~303K, i.e. 20~30℃, simplified to 300K in engineering). Its interior can form a vacuum sealed chamber, integrating functions such as support, sealing, interface and safety protection. It is a barrier that isolates the superconducting magnet 1 from the external environment, providing a vacuum environment, structural support and safety protection for its internal coil assembly 10 (4K / 50K low temperature assembly).

[0049] The outer casing 11 includes an inner casing 1100, an outer casing 1110, an upper casing cap 1101, and a lower casing cap 1111. The outer casing 1110 is spaced outside the inner casing 1100. The axial lengths of the inner casing 1100 and the outer casing 1110 are the same and greater than the axial length of the coil assembly 10. Both axial ends of the inner casing 1100 and the outer casing 1110 extend beyond the axial ends of the coil assembly 10. The upper end cap 1101 is fixedly connected between the upper end of the inner cylinder 1100 and the upper end of the outer cylinder 1110. The lower end cap 1111 is fixedly connected between the lower end of the inner cylinder 1100 and the lower end of the outer cylinder 1110. The upper end cap 1101 seals the upper openings of the inner cylinder 1100 and the outer cylinder 1110, and the lower end cap 1111 seals the lower openings of the inner cylinder 1100 and the outer cylinder 1110. Thus, the inner cylinder 1100, the upper end cap 1101, the outer cylinder 1110, and the lower end cap 1111 together form a closed first chamber 112. The coil assembly 10 is suspended inside the first chamber 112, specifically by means of a pull rod ( Figures 1-3(Not shown in the image) The flange at the upper end of the coil assembly 10 is fixedly connected to the upper end cover 1101 of the housing. Before assembly, the inner cylinder 1100 and the upper end cover 1101 of the housing need to be fixedly connected into an integral structure to facilitate subsequent installation. The fixed connection of the inner cylinder 1100 and the upper end cover 1101 of the housing constitutes the first part 110 of the housing 11. The outer cylinder 1110 and the lower end cover 1111 of the housing also need to be fixedly connected into an integral structure to facilitate subsequent installation. The fixed connection of the outer cylinder 1110 and the lower end cover 1111 of the housing constitutes the second part 111 of the housing 11. It should be noted that the inner cylinder 1100 and the upper end cover 1101 of the housing, as well as the outer cylinder 1110 and the lower end cover 1111 of the housing, can be fixedly connected by means of screwing, bonding or welding. When assembling the first part 110 and the second part 111, the upper end cover is aligned with the outer shell 1110 before being fixedly connected, and the lower end cover is aligned with the inner shell 1100 before being fixedly connected.

[0050] The assembly method between the outer shell 11 and the coil assembly 10 is as follows: Using the position of the coil assembly 10 as a reference, the first part 110 of the outer shell 11 is first hoisted from above the coil assembly 10 into the interior of the coil assembly 10, i.e., the inner cylinder 1100 extends into the interior of the coil assembly 10 along its axial direction. After the upper end cover 1101 of the outer shell is fixedly connected to the coil assembly 10, the second part 111 of the outer shell 11 is then assembled. A positioning assembly device 2 is required for auxiliary installation during the assembly process.

[0051] The specific structure of the positioning and assembly device 2 will be described in detail below.

[0052] like Figures 1-5 As shown, the positioning and assembly device 2 includes a base 20, which includes a first bracket 200 and a second bracket 201. The first bracket 200 and the second bracket 201 are used to support different components. The second bracket 201 is located in the middle of the first bracket 200, and the central axes of the first bracket 200 and the second bracket 201 coincide, thereby ensuring that the components placed on it can be coaxially aligned. The upper end surface of the first bracket 200 is higher than the upper end surface of the second bracket 201, so that a certain height difference is formed between the upper end surface of the first bracket 200 and the upper end surface of the second bracket 201. This height difference refers to the height difference between the lower end of the coil assembly 10 in the superconducting magnet 1 and the lower end of the inner cylinder 1100 (or the height difference between the lower ends of other components that need to be coaxially assembled). The base 20 provides stable support for the components (coil assembly 10, lower end cap 1111, and inner cylinder 1100) placed on it, preventing the components from shaking during assembly and affecting safety and assembly accuracy. Specifically, the upper end face of the first bracket 200 is used to support the coil assembly 10 or the lower end cap 1111, and the upper end face of the second bracket 201 is used to support the inner cylinder 1100.

[0053] It should be noted that the first support 200 can be a cylindrical structure or a frame structure, as long as its interior is hollow enough to accommodate the second support 201, and there is a certain height difference between its upper and lower ends to meet the assembly requirements of the superconducting magnet 1. The second support 201 can be a columnar structure, a plate structure, or a ring structure, as long as its axis coincides with the axis of the first support 200, and there is a certain height difference between its upper surface and the upper surface of the first support 200 to meet the assembly requirements of the superconducting magnet 1.

[0054] The positioning assembly device 2 also includes multiple radial telescopic structures 21, such as Figure 2 and Figure 5 As shown, multiple radial telescopic structures 21 are disposed on the upper end face of the first support 200 and are spaced apart on the outer periphery of the coil assembly 10 along the circumference. The radial telescopic structures 21 are used to adjust the position of the components placed on the upper end face of the first support 200 on the first support 200, that is, to push the coil assembly 10 (or other components, such as the lower end cover 1111) along the radial direction of the coil assembly 10. The purpose is to adjust the coaxiality. The principle of adjusting the coaxiality between the components of the superconducting magnet 1 by using the base 20 and the radial telescopic structures 21 is that the axis between the first support 200 and the second support 201 always coincides. Based on this, as long as the axis of the component placed on the first support 200 coincides with the axis of the first support 200, and the axis of the component placed on the second support 201 coincides with the axis of the second support 201, the axis between the two components of the superconducting magnet 1 can be made to coincide, so as to achieve the purpose of precise adjustment of coaxiality.

[0055] Specifically, each radial telescopic structure 21 extends radially along the coil assembly 10, and each radial telescopic structure 21 has an abutting surface at one end near the coil assembly 10, with the abutting surface facing the outer peripheral surface of the coil assembly 10. The area enclosed between the abutting surfaces of multiple radial telescopic structures 21 is the placement area of ​​the coil assembly 10 or the outer casing 11.

[0056] The contact surface of each radial telescopic structure 21 can move radially toward the coil assembly 10 and abut against the outer peripheral surface of the coil assembly 10 or the outer peripheral surface of the outer shell 11 (outer peripheral surface of the outer cylinder 1110). The position of the coil assembly 10 or the outer cylinder 1110 on the first support 200 is adjusted by pushing. The contact surface of each radial telescopic structure 21 can also move radially away from the coil assembly 10. The reciprocating movement of the contact surface adjusts the position of the placement area, thereby restricting the movement of the coil assembly 10 or the outer shell 11 on the upper surface of the first support 200, that is, adjusting the coil assembly 10 or the outer shell 11 to a position where its axis coincides with the axis of the first support 200. To better fit the contact surface with the coil assembly 10 and the outer shell 11, the contact surface can be configured as an arc-shaped surface.

[0057] It should be noted that the radial telescopic structure 21 can be a spring rod, a gas-driven telescopic rod, a liquid-driven telescopic rod, or an adjustable screw, etc., that extends radially along the coil assembly 10, as long as it can push the corresponding component radially along the coil assembly 10. The number of radial telescopic structures 21 can be two, three, four, or more, as long as they are spaced circumferentially around the coil assembly 10 and can be reciprocated.

[0058] In one specific embodiment of the present invention, such as Figure 2 and Figure 5 As shown, the first support 200 includes a rectangular frame structure with multiple legs erected on a supporting surface, which can be the ground or the plane of an assembly platform. The frame structure also includes a rectangular frame fixed to the top of the legs. The upper surface of the frame structure along its height (i.e., the upper surface of the rectangular frame) forms the upper end face of the first support 200. The circumferential edges of the coil assembly 10 and the lower end cover 1111 rest on the four connecting rods of the rectangular frame. Multiple radial telescopic structures 21 are respectively disposed at the four corners of the frame structure, such as... Figure 5 As shown, in this embodiment, four radial telescopic structures 21 are preferably provided. Each radial telescopic structure 21 is located at the four corners of the rectangular frame and is arranged to extend radially along the coil assembly 10, that is, arranged in pairs opposite each other. The contact surfaces of two radial telescopic structures 21 that are opposite each other can move in the same direction, that is, one moves toward the coil assembly 10 and the other moves away from the coil assembly 10.

[0059] Furthermore, the second bracket 201 is a circular support ring, with its upper surface forming the upper surface of the second bracket 201. The side or bottom of this support ring can be fixedly connected to multiple legs of the rectangular frame, or it can be movably connected to multiple legs of the rectangular frame along the height direction of the rectangular frame. Setting the second bracket 201 as circular facilitates better matching with the circular inner shell 1100 (or other components), improving coaxial assembly accuracy.

[0060] In one specific embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the inner circumference of the support ring has a stepped portion 2010. The stepped surface of the stepped portion 2010 facing the lower end face of the inner cylinder 1100 can be adapted to the lower end face of the inner cylinder 1100, and the stepped surface of the stepped portion 2010 facing the side wall of the inner cylinder 1100 can be adapted to the side wall of the inner cylinder 1100. The stepped portion 2010 can accurately engage the lower end of the inner cylinder 1100 onto the second bracket 201, preventing the inner cylinder 1100 from shifting. Furthermore, a guide slope 2011 is formed at the upper end of the stepped portion 2010, which can accurately guide the lower end of the inner cylinder 1100 onto the stepped portion 2010 when placing it. A buffer pad 2012, such as a sponge pad or a rubber pad, is also provided on the stepped portion 2010. The buffer pad 2012 can absorb the vibration and impact between the inner cylinder 1100 and the second bracket 201.

[0061] To facilitate understanding, the specific usage process of the positioning and assembly device 2 will be explained below with reference to the accompanying drawings.

[0062] The assembly process of superconducting magnet 1 includes the following steps:

[0063] Step 1: Use a spirit level to adjust the base 20 to a horizontal position, and place the coil assembly 10 on the upper surface of the first support 200, that is, between the contact surfaces of the multiple radial telescopic structures 21. The first support 200 provides stable support for the coil assembly 10.

[0064] Step 2: By pushing the outer peripheral surface of the coil assembly 10 (such as the lower edge of the coil frame) through the radial telescopic structure 21, the position of the coil assembly 10 on the first support 200 is adjusted so that the coil assembly 10 coincides with the axis of the first support 200.

[0065] Step 3: Place the inner shell 1100 of the first part 110 on the upper end face of the second support 201, so that the axis of the coil assembly 10 coincides with the axis of the inner shell 1100 placed on the second support 201. The second support 201 also provides stable support for the inner shell 1100 of the first part 110.

[0066] Step 4: Securely connect the coil assembly 10 and the upper end cover 1101 of the first part 110. The upper end cover 1101 and the coil assembly 10 are fixedly connected by multiple pull rods. Place the coil assembly 10 and the upper end cover 1101 of the first part 110 on the base 20 to fix their relative positions, which facilitates a stable connection. The base 20 can prevent shaking that could cause the relative positions to shift.

[0067] Step 5: Use a crane or other lifting device to lift the coil assembly 10 and the first part 110 as a whole, so that other unassembled parts can be placed on the base 20 for alignment and assembly.

[0068] Step 6: Place the lower end cap 1111 of the second part 111 on the upper end face of the first bracket 200.

[0069] Step 7: Push the outer circumferential surface of the outer shell 1110 of the second part 111 through the radial telescopic structure 21, adjust the position of the outer shell 1110 of the second part 111 on the first support 200, so that the outer shell 1110 of the second part 111 coincides with the axis of the first support 200.

[0070] Step 8: The first part 110 and the coil assembly 10 are hoisted to the position where the lower end of the inner cylinder 1100 is aligned with the lower end cover 1111 of the shell. The inner cylinder 1100 and the lower end cover 1111 of the shell are fixedly connected, and the outer cylinder 1110 and the upper end cover 1101 of the shell are fixedly connected. This connection and assembly method makes the coil assembly 10, the inner cylinder 1100 of the first part 110 and the outer cylinder 1110 of the second part 111 coaxially connected, thereby achieving the purpose of accurately adjusting the coaxiality of each component.

[0071] Therefore, placing the coil assembly 10, the lower end cap 1111, and the inner cylinder 1100 on the base 20 of the positioning assembly device 2 lowers the center of gravity of these components, making them less prone to shaking and ensuring stable support. Then, the coil assembly 10 and the outer shell 11 are coaxially aligned and assembled through the radial telescopic structure 21 of the positioning assembly device 2. This method is more stable and has higher coaxial accuracy than the method of relying entirely on hoisting assembly.

[0072] In one specific embodiment of the present invention, such as Figure 2 and Figure 5As shown, each radial telescopic structure 21 includes a fixing block 210, an adjusting rod 211, and an adjusting block 212. The fixing block 210 is fixed to the upper end face of the first bracket 200, such as by fasteners like screws at the four corners of the rectangular frame. The fixing block 210 has a through hole that passes through the fixing block 210 radially along the coil assembly 10. The through hole of the fixing block 210 can restrict the movement direction of the adjusting rod 211 to the radial direction of the coil assembly 10. Adjusting block 212 is radially disposed inside fixed block 210 along coil assembly 10, meaning that the two ends of adjusting block 212 can overlap on the two perpendicular sides of the rectangular frame. The inner side of adjusting block 212 away from fixed block 210 forms a contact surface. Adjusting rod 211 is movably inserted into through hole along the extension direction of through hole and threadedly connected to adjusting block 212. When adjusting rod 211 rotates in through hole, it converts rotational motion into linear motion along the radial direction of coil assembly 10, thereby driving adjusting block 212 to move radially relative to fixed block 210 along coil assembly 10, so that the contact surface moves towards or away from coil assembly 10. Multiple through holes can be opened on each fixed block 210, for example, five, and five adjusting rods 211 arranged side by side can be connected to adjusting block 212. Adjusting rods 211 at different positions can be adjusted according to the offset of coil assembly 10 until the coaxiality requirement is met.

[0073] In one specific embodiment of the present invention, such as Figure 5 As shown, when multiple adjusting rods 211 are provided, the radial telescopic structure 21 also includes multiple guide structures 213 spaced apart. Each guide structure 213 is disposed between the adjusting block 212 and the fixed block 210 to guide the adjusting block 212 to move radially relative to the fixed block 210 along the coil assembly 10. Each guide structure 213 is a hollow rod-shaped structure that can prevent the adjusting rod 211 from rotating. The adjusting rod 211 is a fastener, which includes a smooth rod portion and a threaded portion connected sequentially along its length. The smooth rod portion is rotatably inserted into a corresponding through hole on the fixed block 210. The adjusting block 212 has a threaded hole on the side near the fixed block 210. The threaded portion is threadedly connected to the threaded hole of the adjusting block 212. When the smooth rod portion of the fastener rotates in the through hole, the threaded portion drives the adjusting block 212 to move radially along the coil assembly 10.

[0074] In one specific embodiment of the present invention, such as Figure 1 As shown, the positioning and assembly device 2 also includes an outer rounding component 24, which is fitted around the outer periphery of the outer shell 1110. The outer shell 1110 may deform due to transportation, welding, etc., causing its original circular shape to become an ellipse. The outer rounding component 24 can correct the outer shell 1110, ensuring its regular shape and preventing deformation. Figure 6As shown, the outer circular assembly 24 includes an outer reinforcing ring 240. The diameter of the outer reinforcing ring 240 is larger than the diameter of the outer shell 1110. The outer reinforcing ring 240 has a plurality of first connecting holes 2400 spaced apart along the circumference of the outer reinforcing ring 240. Reinforcing ribs can also be provided between the plurality of first connecting holes 2400 to improve the structural strength of the outer circular assembly 24. Multiple outer supports 241 are spaced circumferentially along the outer reinforcing ring 240. Each outer support 241 corresponds to a first connecting hole 2400. The outer supports 241 and the first connecting holes 2400 can be threaded together. Each outer support 241 passes through a corresponding first connecting hole 2400 and is fixedly connected to it. The end of each outer support 241 near the inner circumference of the outer reinforcing ring 240 is used to abut against the outer peripheral wall of the outer shell 1110. The outer supports 241 can generate a uniform radial support force on the outer shell 1110, correcting the slight deformation of the outer shell 1110 and restoring it to a regular circular shape. The end of each outer support 241 that abuts against the outer shell 1110 can be an abutment with a size larger than the radial dimension of the first connecting hole 2400.

[0075] It should be noted that the outer support 241 can be made of stainless steel. The number of the first connecting holes 2400 can be four, eight, twelve or more. The number of outer support 241 matches the number of the first connecting holes 2400. As long as the first connecting holes 2400 and the outer support 241 match, they can jointly support the outer shell 1110.

[0076] In one specific embodiment of the present invention, such as Figure 6 As shown, the outer reinforcing ring 240 includes two semicircular rings that abut against each other along its circumference. The ends of the two semicircular rings can be detachably fixed to each other through a flange connection structure. The two semicircular rings can be fitted onto the outer periphery of the outer shell 1110 from both sides. After the two are fixedly connected, the outer shell 1110 can be fastened. Each outer support leg 241 can be welded to the outer peripheral wall of the outer shell 1110 after it abuts against the outer shell 1110.

[0077] In one specific embodiment of the present invention, such as Figure 1 As shown, the positioning and assembly device 2 also includes an inner rounding component 25, which is embedded in the inner circumference of the inner shell cylinder 1100. The inner shell cylinder 1100 may deform due to transportation, welding, etc., causing its original circular shape to become an ellipse. The inner rounding component 25 can correct the shape of the inner shell cylinder 1100, ensuring its regularity and preventing deformation. Figure 7As shown, the inner circular assembly 25 includes an inner reinforcing ring 250. The diameter of the inner reinforcing ring 250 is smaller than the diameter of the inner cylinder 1100. The inner reinforcing ring 250 has a plurality of second connecting holes 2500 spaced apart along the circumference of the inner reinforcing ring 250. Reinforcing ribs can also be provided between the plurality of second connecting holes 2500 to improve the structural strength of the inner circular assembly 25. Multiple inner support legs 251 are spaced circumferentially along the inner reinforcing ring 250. Each inner support leg 251 corresponds one-to-one with a multiple second connecting hole 2500. The inner support legs 251 and the second connecting holes 2500 can be threaded together. Each inner support leg 251 passes through and is fixedly connected to a corresponding second connecting hole 2500. One end of each inner support leg 251 near the outer periphery of the inner reinforcing ring 250 abuts against the inner circumferential wall of the inner shell 1100. The inner support legs 251 provide uniform radial support to the inner shell 1100, correcting any slight deformation and restoring its regular circular shape. The end of each inner support leg 251 that abuts against the inner shell 1100 can be an abutment with a size larger than the radial dimension of the second connecting hole 2500. After abutting against the inner shell 1100, each inner support leg 251 can be welded to the inner circumferential wall of the inner shell 1100.

[0078] It should be noted that the inner support 251 can be made of stainless steel, and the number of the second connecting holes 2500 can be four, eight, twelve or more. The number of inner support 251 matches the number of the second connecting holes 2500. As long as the second connecting holes 2500 and the inner support 251 match, they can jointly support the inner cylinder 1100 of the shell.

[0079] Example 2

[0080] This embodiment provides a positioning and assembly device for superconducting magnets suitable for magnetically controlled crystal pulling. The positioning and assembly device provided in this embodiment is also applicable to another type of magnetically controlled crystal pulling superconducting magnet, such as... Figures 1-4 As shown, the superconducting magnet 1 of the magnetron crystal pulling in this embodiment includes a coil assembly 10, a shell 11, and a heat radiation shield 12. The heat radiation shield 12 is located outside the coil assembly 10 (4K assembly) and inside the shell 11 (300K assembly). It has an overall annular hollow cylindrical structure and serves as a heat radiation shielding system between the coil assembly 10 and the shell 11. It is usually maintained in the temperature range of 40-60K. Its main function is to significantly reduce the heat radiation from the outside to the coil assembly 10. It is a key thermal management barrier in the cryogenic system of the superconducting magnet 1.

[0081] like Figure 1As shown, with the outer shell 11, coil assembly 10, and thermal radiation shield 12 assembled, the thermal radiation shield 12 is disposed within the first chamber 112 and includes an inner shielding component 120 and an outer shielding component 121. The inner shielding component 120 includes an inner shielding cylinder 1200 and an upper shielding cap 1201 fixedly connected to the upper end of the inner shielding cylinder 1200 and protruding radially outward from the inner shielding cylinder 1200. The outer shielding component 121 includes an outer shielding cylinder 1210 and a lower end fixedly connected to the outer shielding cylinder 1210. A lower shielding cap 1211 protrudes radially inward along the outer shielding cylinder 1210. The inner shielding cylinder 1200 and the outer shielding cylinder 1210 are spaced apart. The inner shielding cylinder 1200 is located between the inner cylinder of the coil assembly 10 and the inner shell cylinder 1100; the outer shielding cylinder 1210 is located between the outer periphery of the coil assembly 10 and the outer shell cylinder 1110; the upper shielding cap 1201 is located between the upper end of the coil assembly 10 and the upper shell cap 1101; and the lower shielding cap 1211 is located between the lower end of the coil assembly 10 and the lower shell cap 1111. The inner shielding cylinder 1200, the upper shielding cap 1201, the outer shielding cylinder 1210, and the lower shielding cap 1211 together form a closed second chamber 122. The coil assembly 10 is suspended within the second chamber 122. Specifically, the upper flange of the coil assembly 10 can be fixedly connected to the upper shielding cap 1201 using a positioning post 23. The positioning post 23 can be made of G10 material. Before assembly, the inner shielding cylinder 1200 and the upper shielding cap 1201 need to be fixedly connected into a single structure, thus forming an integral structure for the inner shielding components 120, to facilitate subsequent installation. Similarly, the outer shielding cylinder 1210 and the lower shielding cap 1211 need to be fixedly connected into a single structure, thus forming an integral structure for the outer shielding components 121, to facilitate subsequent installation. It should be noted that the inner shielding cylinder 1200 and the upper shielding cap 1201, as well as the outer shielding cylinder 1210 and the lower shielding cap 1211, can be fixedly connected by screws, adhesives, or welding. When assembling the inner shielding components 120 and the outer shielding components 121, the upper shielding cap 1201 should be aligned with the outer shielding cylinder 1210 before being fixedly connected, and the lower shielding cap 1211 should be aligned with the inner shielding cylinder 1200 before being fixedly connected.

[0082] The assembly method between the outer shell 11, the thermal radiation shield 12, and the coil assembly 10 is as follows: Taking the position of the coil assembly 10 as a reference, the inner shield 120 is first hoisted from above the coil assembly 10 into the interior of the coil assembly 10, so that the inner shield cylinder 1200 of the inner shield 120 extends into the interior of the coil assembly 10 along the axial direction of the coil assembly 10. The upper shield cover 1201 is fixedly connected to the coil assembly 10. Then, the first part 110 of the outer shell 11 is hoisted from above the coil assembly 10 into the interior of the inner shield cylinder 1200, so that the inner shell cylinder 1100 extends into the interior of the inner shield cylinder 1200 along the axial direction of the coil assembly 10. The upper shell cover 1101 is fixedly connected to the coil assembly 10 (or the upper shield cover 1201). Next, the outer shield 121 is assembled, and the lower end of the inner shield cylinder 1200 and the lower shield cover 1211 are aligned and installed. The lower end of the inner shell cylinder 1100 and the lower shell cover 1111 are aligned and installed. The positioning assembly device 2 is required for auxiliary installation during the assembly process.

[0083] The positioning and assembly device 2 includes a base 20 (including a first bracket 200 and a second bracket 201), multiple radial telescopic structures 21, an outer circular assembly 24, and an inner circular assembly 25. The upper end face of the first bracket 200 is also used to support the lower end cover 1211 of the shield, and the upper end face of the second bracket 201 is also used to support the inner shield cylinder 1200. Figures 1-5 As shown, the positioning and assembly device 2 provided in this embodiment further includes a lifting component 22 and a positioning column 23 based on embodiment 1. The lifting component 22 is connected to the second bracket 201. The lifting component 22 can drive the second bracket 201 to move relative to the first bracket 200 in a first direction toward or away from the coil assembly 10, thereby adjusting the height difference between the upper end face of the second bracket 201 and the upper end face of the first bracket 200 according to the assembly height difference requirements between different components. That is, the second bracket 201 can drive the inner shell cylinder 1100 or the shielding inner cylinder 1200 placed on it to rise or fall in the axial direction of the coil assembly 10, so as to limit the movement of the inner shell cylinder 1100 or the shielding inner cylinder 1200 in the axial direction of the coil assembly 10. The first direction is parallel to the height direction of the base 20 and the axial direction of the coil assembly 10. It should be noted that when the second bracket 201 is used to place both the inner shell cylinder 1100 and the inner shield cylinder 1200, annular slots that are adapted to the radial dimensions of the inner shell cylinder 1100 and the inner shield cylinder 1200 can be opened on the upper end face (e.g., the upward-facing stepped surface) of the second bracket 201, so that the inner shell cylinder 1100 and the inner shield cylinder 1200 can be accurately engaged in the corresponding positions, thereby improving the coaxial accuracy during assembly.

[0084] It should be noted that the lifting component 22 can be a hydraulic drive component extending in the first direction, a pneumatic drive component extending in the first direction, a spring rod extending in the first direction, or a lead screw structure extending in the first direction, as long as it can drive the second bracket 201 to rise and fall in the first direction.

[0085] In one specific embodiment of the present invention, such as Figures 1-4 As shown, the lifting assembly 22 includes a screw 220 and a threaded connection component 221. The screw 220 extends along a first direction and its upper end is fixedly connected (e.g., via a flange connection) to the bottom of the second bracket 201. The threaded connection component 221 is sleeved on the outer periphery of the screw 220 and threadedly connected to it. The threaded connection component 221 is a hollow cylindrical structure with an internal thread on its inner wall that matches the external thread of the screw 220. The threaded connection converts rotational motion into linear motion. The threaded connection component 221 is rotatably mounted on the first bracket 200 about its axis. For example, an auxiliary connecting frame can be fixedly connected between multiple legs of the first bracket 200, and the threaded connection component 221 can be rotatably mounted on the auxiliary connecting frame. The rotation of the threaded connection component 221 drives the screw 220 and the second bracket 201 to move towards or away from the coil assembly 10 in the first direction. The threaded connection component 221 can be rotated by a handwheel or a motor.

[0086] The lifting assembly 22 has multiple components, which are circumferentially spaced around the coil assembly 10 to apply a uniform pushing force to the second bracket 201. It should be noted that the number of lifting assemblies 22 can be two, three, four, or more.

[0087] To facilitate understanding, the specific usage process of the positioning and assembly device 2 will be explained below with reference to the accompanying drawings.

[0088] The assembly of superconducting magnet 1 consists of the following steps:

[0089] Step 1: Use a spirit level to adjust the base 20 to a horizontal position, and place the coil assembly 10 on the upper surface of the first support 200, that is, between the contact surfaces of the multiple radial telescopic structures 21. The first support 200 provides stable support for the coil assembly 10.

[0090] Step 2: By pushing the outer peripheral surface of the coil assembly 10 (such as the lower edge of the coil frame) through the radial telescopic structure 21, the position of the coil assembly 10 on the first support 200 is adjusted so that the coil assembly 10 coincides with the axis of the first support 200.

[0091] Step 3: Adjust the height of the upper surface of the second bracket 201 by using the lifting component 22, so that the height difference between the upper surface of the second bracket 201 and the upper surface of the first bracket 200 is the same as the height difference between the lower end of the coil assembly 10 and the lower end of the shielding inner cylinder 1200.

[0092] Step 4: Place the inner shielding cylinder 1200 of the inner shielding component 120 on the upper end face of the second bracket 201, so that the axis of the coil assembly 10 coincides with the axis of the inner shielding cylinder 1200 placed on the second bracket 201. The second bracket 201 also provides stable support for the inner shielding cylinder 1200 of the inner shielding component 120.

[0093] It should be noted that placing the inner shielding cylinder 1200 of the inner shielding component 120 on the upper surface of the second bracket 201 is not necessary. The inner shielding component 120 can be hoisted along the axis of the coil assembly 10 to a position close to the coil assembly 10, and then the coil assembly 10 and the shielding upper cover 1201 of the inner shielding component 120 can be fixedly connected by multiple positioning posts 23. After the fixing is completed, step seven can be performed directly. This operation can simplify the operation process and improve assembly efficiency.

[0094] Step 5: Securely connect the upper shielding cover 1201 of the coil assembly 10 and the inner shielding component 120. The upper shielding cover 1201 and the coil assembly 10 are fixedly connected by multiple positioning posts 23. Place the coil assembly 10 and the upper shielding cover 1201 of the inner shielding component 120 on the base 20 to fix their relative positions, facilitating a stable connection. The base 20 can prevent shaking that could cause a shift in their relative positions.

[0095] Step 6: Use a crane or other lifting device to lift the coil assembly 10 and the inner shielding component 120 as a whole, so that other unassembled components can be placed on the base 20 for alignment and assembly.

[0096] Step 7: Adjust the height of the upper surface of the second bracket 201 by using the lifting component 22, so that the height difference between the upper surface of the second bracket 201 and the upper surface of the first bracket 200 is the same as the height difference between the lower end of the coil assembly 10 and the lower end of the inner cylinder 1100.

[0097] Step 8: Place the inner shell 1100 of the first part 110 on the upper surface of the second support 201. The upper shell cover 1101 and the upper shield cover 1201 are fixedly connected by multiple tie rods, so that the axis of the coil assembly 10 coincides with the axis of the inner shell 1100 placed on the second support 201. The second support 201 also provides stable support for the inner shell 1100 of the first part 110.

[0098] Step 9: Securely connect the coil assembly 10 and the upper cover 1101 of the first part 110. The upper cover 1101 and the coil assembly 10 are fixedly connected by multiple pull rods. Place the coil assembly 10 and the upper cover 1101 of the first part 110 on the base 20 to fix their relative positions, which facilitates a stable connection. The base 20 can prevent shaking that could cause the relative positions to shift.

[0099] Step 10: Use a crane or other lifting device to lift the coil assembly 10, inner shielding component 120 and first part 110 as a whole, so that other unassembled components can be placed on the base 20 for alignment and assembly.

[0100] Step 11: Place the lower shielding cap 1211 of the outer shielding component 121 on the upper surface of the first bracket 200.

[0101] Step 12: Push the outer circumferential surface of the outer shielding component 121's shielding outer cylinder 1210 through the radial telescopic structure 21, adjust the position of the outer shielding component 121's shielding outer cylinder 1210 on the first bracket 200 so that the outer shielding component 121's shielding outer cylinder 1210 coincides with the axis of the first bracket 200, and adjust the height difference between the upper end face of the second bracket 201 and the upper end face of the first bracket 200 through the lifting component 22 to be the height difference between the lower end cover 1211 of the shielding and the lower end of the inner cylinder 1100.

[0102] Step 13: Hoist the coil assembly 10, the inner shielding component 120 and the first part 110 to the position where the lower end of the inner shielding cylinder 1200 is aligned with the lower shielding end cover 1211. At this time, the lower end of the inner shell cylinder 1100 rests on the second bracket 201 and is stably supported. The inner shielding cylinder 1200 and the lower shielding end cover 1211 are fixedly connected, and the outer shielding cylinder 1210 and the upper shielding end cover 1201 are fixedly connected.

[0103] Step 14: Lift the coil assembly 10, the thermal radiation shield 12, and the first part 110 as a whole using a crane or other lifting equipment.

[0104] Step 15: Place the lower end cap 1111 of the second part 111 on the upper end face of the first bracket 200.

[0105] Step 16: Push the outer circumferential surface of the outer shell 1110 of the second part 111 through the radial telescopic structure 21, adjust the position of the outer shell 1110 of the second part 111 on the first support 200, so that the outer shell 1110 of the second part 111 coincides with the axis of the first support 200.

[0106] Step 17: Hoist the coil assembly 10, the heat radiation shield 12, and the first part 110 to the position where the lower end of the inner cylinder 1100 is aligned with the lower end cover 1111 of the shell. The inner cylinder 1100 and the lower end cover 1111 of the shell are fixedly connected, and the outer cylinder 1110 and the upper end cover 1101 of the shell are fixedly connected. This connection and assembly method makes the coil assembly 10, the heat radiation shield 12, and the outer shell 11 coaxially connected, thereby achieving the purpose of accurately adjusting the coaxiality of each component.

[0107] Therefore, placing the coil assembly 10, the lower end cover 1111, the inner cylinder 1100, the lower end cover 1211, and the inner cylinder 1200 on the base 20 of the positioning and assembly device 2 lowers the center of gravity of these components, making them less prone to shaking and ensuring stable support. Then, the coil assembly 10, the outer shell 11, and the heat radiation shield 12 are coaxially aligned and assembled through the radial telescopic structure 21 of the positioning and assembly device 2. This method is more stable and has higher coaxial accuracy than the method of relying entirely on hoisting assembly.

[0108] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to those embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a thorough understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0109] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0110] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present 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 limiting the present invention.

[0111] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0112] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0113] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A superconducting magnet positioning and assembly device suitable for magnetically controlled crystal pulling, the superconducting magnet comprising a coil assembly and a shell, the shell comprising an inner shell cylinder, an outer shell cylinder, an upper shell cap, and a lower shell cap, the outer shell cylinder being spaced apart from the inner shell cylinder, the upper shell cap being fixedly connected between the upper end of the inner shell cylinder and the upper end of the outer shell cylinder, and the lower shell cap being fixedly connected between the lower end of the inner shell cylinder and the lower end of the outer shell cylinder, such that the inner shell cylinder, the upper shell cap, the outer shell cylinder, and the lower shell cap together form a closed first chamber, the coil assembly being fixedly connected to the upper shell cap for suspension within the first chamber; the fixedly connected inner shell cylinder and the upper shell cap constitute a first part of the shell, and the fixedly connected outer shell cylinder and the lower shell cap constitute a second part of the shell; characterized in that, The positioning and assembly device includes: The base includes a first bracket and a second bracket. The second bracket is disposed in the middle of the first bracket, and the upper end face of the first bracket is higher than the upper end face of the second bracket. The upper end face of the first bracket is used to support the coil assembly or the lower end cover of the shell, and the upper end face of the second bracket is used to support the inner cylinder of the shell. Multiple radial telescopic structures are disposed on the upper end face of the first bracket and spaced circumferentially on the outer periphery of the coil assembly. Each radial telescopic structure has an abutment surface that can move radially toward or away from the coil assembly. The abutment surface is used to abut against the outer periphery of the coil assembly or the outer periphery of the housing to restrict the movement of the coil assembly or the housing on the upper end face of the first bracket. When the inner shell of the first part is placed on the upper end face of the second support, the upper end cover of the shell and the coil assembly are fixedly connected by multiple tie rods; when the lower end cover of the second part is placed on the upper end face of the first support, the first part and the coil assembly are hoisted to the position where the lower end of the inner shell is aligned with the lower end cover of the shell, and the inner shell and the lower end cover of the shell are fixedly connected, as are the outer shell and the upper end cover of the shell.

2. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in claim 1, characterized in that, Each of the radial telescopic structures includes a fixed block, an adjusting rod, and an adjusting block. The fixed block is fixed to the upper end face of the first bracket, and a through hole is formed on the fixed block that penetrates the fixed block radially along the coil assembly. The adjusting block is disposed on the inner side of the fixed block radially along the coil assembly, and the inner side of the adjusting block away from the fixed block forms the abutment surface. The adjusting rod is movably inserted into the through hole along the extension direction of the through hole and is threadedly connected to the adjusting block. When the adjusting rod rotates in the through hole, it drives the adjusting block to move relative to the fixed block radially along the coil assembly.

3. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in claim 2, characterized in that, The radial telescopic structure further includes a plurality of guide structures spaced apart, each guide structure being disposed between the adjusting block and the fixed block to guide the adjusting block to move radially relative to the fixed block along the coil assembly; The adjusting rod is a fastener, which includes a smooth rod portion and a threaded portion connected sequentially along its length. The smooth rod portion is rotatably inserted into the through hole. The adjusting block is provided with a threaded hole, and the threaded portion is threadedly connected to the threaded hole of the adjusting block so that the adjusting block can be moved by the rotation of the fastener.

4. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in claim 1, characterized in that, The first support includes a rectangular frame structure, the upper surface of the frame structure along its height direction forms the upper end surface of the first support, the frame structure is supported on the support surface, and the plurality of radial telescopic structures are respectively disposed at the four corners of the frame structure; The second bracket is a circular support ring.

5. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in claim 4, characterized in that, The inner circumference of the support ring is provided with a stepped portion. The stepped surface of the stepped portion facing the lower end face of the inner shell cylinder can be adapted to the lower end face of the inner shell cylinder, and the stepped surface of the stepped portion facing the side wall of the inner shell cylinder can be adapted to the side wall of the inner shell cylinder. The upper end of the step is formed with a guide slope, and a buffer pad is provided on the step.

6. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in any one of claims 1-5, characterized in that, The superconducting magnet further includes a thermal radiation shielding component disposed within the first cavity. This component comprises an inner shielding part and an outer shielding part. The inner shielding part includes an inner shielding cylinder and an upper shielding cap fixedly connected to the upper end of the inner shielding cylinder and protruding radially outward from the inner shielding cylinder. The outer shielding part includes an outer shielding cylinder and a lower shielding cap fixedly connected to the lower end of the outer shielding cylinder and protruding radially inward from the outer shielding cylinder. The inner shielding cylinder, the upper shielding cap, the outer shielding cylinder, and the lower shielding cap together form a closed second cavity. The coil assembly is fixedly connected to the upper shielding cap for suspension within the second cavity. The upper surface of the first support also supports the lower shielding cap, and the upper surface of the second support also supports the inner shielding cylinder. The positioning and assembly device further includes a lifting assembly, which is connected to the second bracket. The lifting assembly can drive the second bracket to move relative to the first bracket in a first direction toward or away from the coil assembly, so as to restrict the movement of the inner shell or the inner shielding cylinder in the axial direction of the coil assembly; the first direction is parallel to the height direction of the base and the axial direction of the coil assembly. When the inner shielding cylinder is placed on the upper end face of the second bracket, the upper shielding cover and the coil assembly are fixedly connected by multiple positioning posts. When the lower shielding cover is placed on the upper end face of the first bracket, the inner shielding component and the coil assembly are hoisted to the position where the lower end of the inner shielding cylinder is aligned with the lower shielding cover. The inner shielding cylinder and the lower shielding cover are fixedly connected, as are the outer shielding cylinder and the upper shielding cover. When the inner shell of the first part is placed on the upper end face of the second bracket, the upper end cover of the shell and the upper end cover of the shield are fixedly connected by multiple tie rods.

7. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in claim 6, characterized in that, The lifting assembly includes a screw and a threaded connection component. The screw extends along the first direction and its upper end is fixedly connected to the second bracket. The threaded connection component is sleeved on the outer periphery of the screw and threadedly connected to the screw. The threaded connection component is rotatably disposed on the first bracket about its axis so that the screw and the second bracket can be moved in the first direction toward or away from the coil assembly by the rotation of the threaded connection component. The lifting assembly is of multiple types, and the multiple lifting assemblies are arranged at circumferential intervals around the coil assembly.

8. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in any one of claims 1-5, characterized in that, The positioning and assembly device further includes an outer rounding assembly, which is sleeved on the outer periphery of the outer shell cylinder. The outer rounding assembly includes an outer reinforcing ring and a plurality of outer support legs spaced apart circumferentially along the outer reinforcing ring. The outer reinforcing ring has a plurality of first connecting holes spaced apart circumferentially along the outer reinforcing ring. The plurality of outer support legs and the plurality of first connecting holes correspond one-to-one. Each outer support leg passes through a corresponding first connecting hole and is fixedly connected to the first connecting hole. The end of each outer support leg near the inner periphery of the outer reinforcing ring is used to abut against the outer peripheral wall of the outer shell cylinder.

9. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in claim 8, characterized in that, The outer reinforcing ring includes two semicircular rings that abut against each other along its circumference, the ends of which are detachably fixed to each other.

10. The superconducting magnet positioning and assembly device for magnetized crystal pulling as described in any one of claims 1-5, characterized in that, The positioning and assembly device further includes an inner rounding component, which is embedded in the inner circumference of the inner shell cylinder. The inner rounding component includes an inner reinforcing ring and a plurality of inner support legs spaced apart along the circumference of the inner reinforcing ring. The inner reinforcing ring has a plurality of second connecting holes spaced apart along the circumference of the inner reinforcing ring. The plurality of inner support legs and the plurality of second connecting holes correspond one-to-one. Each inner support leg passes through a corresponding second connecting hole and is fixedly connected to the second connecting hole. The end of each inner support leg near the outer circumference of the inner reinforcing ring is used to abut against the inner circumferential wall of the inner shell cylinder.

Images