Shielding coil structure of superconducting magnet

Abstract

The utility model relates to the technical field of superconducting magnets, in particular to a shielding coil structure of a superconducting magnet, which comprises a coil groove and a shielding coil arranged in the coil groove. The shielding coil comprises a wire inlet section and a wire return section; the wire return section of the shielding coil is located on the outer side of the shielding coil. A wire return protection layer is arranged on the outer side of the shielding coil corresponding to the wire inlet and outlet, a wire return groove is formed in the wire return protection layer, and the wire return section is located in the wire return groove; and the loop protection layer is a flexible layer. A glass wool cloth belt layer, a copper belt layer and a stainless steel wire layer are arranged on the outer side of the shielding coil; the loop protection layer is located on the inner side of the glass wool cloth tape layer. According to the shielding coil structure of the superconducting magnet, the loop wire protection layer is arranged at the loop wire section of the shielding coil, loop wire distortion of the loop wire section of the shielding coil in the test or operation process of the superconducting magnet can be prevented, the loop wire section is effectively protected, the stability and reliability of the superconducting magnet are ensured, and the structure is simple and practical.

Description

Technical Field

[0001] This utility model relates to the field of superconducting magnet technology, and in particular to a shielded coil structure for a superconducting magnet. Background Technology

[0002] A superconducting magnet consists of a main coil and a secondary coil. Each coil has multiple slots inside for winding a superconducting wire with a fixed number of turns. During the fabrication of a superconducting magnet, after the superconducting wire is wound, a shielding coil is usually wrapped around it to optimize the magnetic field environment and ensure the performance and safety of the superconducting magnet.

[0003] The shielding coil of a superconducting magnet is one of the key components ensuring its performance and safety. The shielding coil generates a magnetic field of appropriate magnitude and direction opposite to the external magnetic field, forming a magnetic shield that cancels or reduces the influence of the magnetic field generated by the main coil on the surrounding environment. The shielding coil also protects the main coil from interference from external magnetic fields, ensuring that the main coil can operate stably in the predetermined magnetic field environment.

[0004] By precisely designing and winding the shielding coil, the magnetic field environment can be optimized, magnetic field leakage and interference can be reduced, and the stability and reliability of the superconducting magnet can be improved. Simultaneously, the entry and exit points of the shielding coil are also carefully designed to ensure its integrity and ease of installation. After the shielding coil is wound, when the return segment of the superconducting wire at the end of the shielding coil is led out, the return segment is located on the surface of the shielding coil and protrudes above the surface of the shielding coil.

[0005] In the existing technology, the return line segment of the shielding coil is easily damaged and lacks special protection, which directly or indirectly affects the quality of the shielding coil and the overall performance of the superconducting magnet.

[0006] Therefore, designing a shielded coil structure for a superconducting magnet has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] The technical problem this utility model aims to solve is to provide a shielded coil structure for a superconducting magnet, which addresses the above-mentioned shortcomings by setting a return line protection layer at the return line segment of the shielded coil. This can prevent return line distortion of the shielded coil return line segment during testing or operation of the superconducting magnet, effectively protect the return line segment, and ensure the stability and reliability of the superconducting magnet. It has the advantages of simple structure and practicality.

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0009] A shielding coil structure for a superconducting magnet includes a coil slot and a shielding coil disposed within the coil slot; the shielding coil includes an inlet section and a return section; the return section of the shielding coil is located on the outer side of the shielding coil; a return protection layer is provided on the outer side of the shielding coil at the position corresponding to the inlet and outlet, and a return groove is provided on the return protection layer, with the return section located within the return groove.

[0010] As an improvement, the return line protection layer is a flexible layer.

[0011] As an improvement, the return line protection layer is made of multiple layers of polyester fiberglass cloth, and the width of the return line protection layer is adapted to the width of the coil slot.

[0012] As an improvement, the depth of the return groove is not less than the thickness of the return segment.

[0013] As an improvement, the multilayer polyester fiberglass cloth of the return line protection layer has different lengths, with the innermost polyester fiberglass cloth being the longest and the lengths decreasing sequentially from the inside out.

[0014] As an improvement, the return line protection layer is thicker in the middle and thinner at both ends, and the return line groove is provided at the position where the thickness of the return line protection layer is the greatest.

[0015] As an improvement, the dimensions and orientation of the return groove are adapted to the dimensions and orientation of the return line segment.

[0016] As an improvement, the coil slot is provided with an inlet / outlet port, which is located on the side of the coil slot. The inlet and outlet sections of the shielded coil both enter and exit the coil slot through the inlet / outlet port.

[0017] As an improvement, the outer side of the shielding coil is provided with an annular layer of glass fiber cloth tape, a copper tape layer and a stainless steel wire layer in sequence; the return line protection layer is located inside the glass fiber cloth tape layer.

[0018] The present invention adopts the above technical solution and has the following advantages compared with the prior art:

[0019] The shielding coil structure of this superconducting magnet utilizes a return line protective layer made of polyester fiberglass cloth of specific dimensions and layout. This provides all-around protection for the return line segment, effectively resisting external mechanical damage and electromagnetic interference, enhancing protective performance, and significantly improving the reliability and stability of the return line segment of the superconducting magnet's shielding coil. The excellent properties of the polyester fiberglass cloth enable it to maintain stable performance in harsh environments such as high temperature and humidity, ensuring that the return line segment can operate normally under various complex conditions, broadening the application range of superconducting magnets and enabling them to adapt to complex environments.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the shielding coil structure of the superconducting magnet in this utility model;

[0022] Figure 2 for Figure 1 Enlarged view of point E in the image;

[0023] Figure 3 for Figure 1 AA section view in the middle;

[0024] Figure 4 for Figure 3 Enlarged view of point F in the image;

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the center loop protective layer;

[0026] Figure 6 for Figure 5 BB section view in the middle;

[0027] Wherein: 1-coil slot, 2-shielded coil, 3-inlet / outlet port, 4-inlet section, 5-return section, 6-return protective layer, 7-return slot. Detailed Implementation

[0028] For ease of explanation rather than limitation, the direction on the shielding coil closest to its center hole is defined as inside, and the opposite direction is defined as outside.

[0029] Example

[0030] like Figures 1 to 4 As shown, the superconducting magnet includes a frame 10, a coil 11 and a shielding coil 2. The frame 10 is provided with a coil slot 1, and the coil 11 and the shielding coil 2 are wound sequentially from the inside to the outside in the coil slot 1.

[0031] like Figures 1 to 6 As shown, a shielding coil structure for a superconducting magnet is characterized by comprising a coil slot 1 and a shielding coil 2 disposed within the coil slot 1; the shielding coil 2 includes an inlet section 4 and a return section 5. The coil slot 1 is provided with inlet / outlet ports 3, which are located on the side of the coil slot 1. Both the inlet section 4 and the return section 5 of the shielding coil 2 enter and exit the coil slot 1 through the inlet / outlet ports 3.

[0032] like Figures 1 to 6 As shown, the return line segment 5 of the shielded coil 2 is located on the outer side of the shielded coil 2; a return line protection layer 6 is provided on the outer side of the shielded coil 2 at the position corresponding to the inlet / outlet port 3, and a return line groove 7 is provided on the return line protection layer 6, with the return line segment 5 located in the return line groove 7.

[0033] The return line protection layer 6 is a flexible layer, made of polyester fiberglass cloth or other materials with similar properties as the protective material for the return line segment 5. The return line protection layer 6 is composed of multiple layers of polyester fiberglass cloth, and its width is adapted to the width of the coil groove 1. The depth of the return line groove 7 is not less than the thickness of the return line segment 5, ensuring effective protection for the return line segment 5. The multiple layers of polyester fiberglass cloth in the return line protection layer 6 have different lengths, with the innermost layer being the longest, and the length decreasing sequentially from the inside out. The return line protection layer 6 is thicker in the middle and thinner at both ends, with the return line groove 7 located at the thickest point. The dimensions and orientation of the return line groove 7 are adapted to the dimensions and orientation of the return line segment 5.

[0034] In this embodiment, preferably, the return protection layer 6 is made of polyester fiberglass cloth, consisting of five layers of polyester fiberglass cloth. During the fabrication of the return protection layer 6, polyester fiberglass cloth with a width matching the coil groove 1 is precisely cut, with each layer having lengths of 200mm, 160mm, 120mm, 80mm, and 40mm respectively. The five layers of polyester fiberglass cloth are then arranged in descending order of length... Figure 5 The five layers of polyester fiberglass cloth are arranged sequentially. The arrangement of the five layers ensures that the middle layer is placed last, which is used to house the return cable groove 7. This layout can provide different levels of protection for the return cable segment 5 based on the actual stress and electromagnetic environment during use, effectively dispersing stress and enhancing the overall protective effect.

[0035] Polyester fiberglass cloth is composed of 60% glass fiber and 40% polyester fiber, combining the high strength of glass fiber with the flexibility of polyester fiber. It features low elongation and high instantaneous tensile strength, which can effectively eliminate stress concentration and delay the formation of reflective cracks. It also has the characteristics of high temperature resistance, non-wrinkling and non-stretching, and can remain stable in complex environments.

[0036] In practical applications, the return groove 7 on the return protection layer 6 is not processed initially. After the superconducting wire of the shielding coil 2 is wound, the return protection layer 6 is placed in the coil groove 1 at the position corresponding to the inlet / outlet 3. At this time, according to the specific path of the return segment 5, the return groove 7 of the corresponding size and direction is carefully cut out using a scalpel. The precise operation of the scalpel ensures that the size and shape of the return groove 7 are accurate and can fit tightly with the return segment 5, which not only ensures the normal installation of the return segment 5, but also provides stable support and protection for the return segment 5. The return segment 5 is then placed in the cut return groove 7. Because the polyester fiberglass cloth is relatively soft, it can be easily bent along the arc of the return segment 5 and smoothly transitioned, which not only protects the return segment 5 on the superconducting wire of the shielding coil 2, but also effectively reduces electromagnetic interference when the shielding coil 2 is working, ensuring the stability of the signal transmission of the return segment 5.

[0037] The shielding coil structure of this superconducting magnet utilizes a return line protection layer 6 made of polyester fiberglass cloth of specific dimensions and layout. This layer provides all-around protection for the return line segment 5, effectively resisting external mechanical damage and electromagnetic interference, enhancing protective performance, and significantly improving the reliability and stability of the return line segment 5 of the superconducting magnet shielding coil. The excellent properties of the polyester fiberglass cloth enable it to maintain stable performance in harsh environments such as high temperature and humidity, ensuring that the return line segment 5 can operate normally under various complex conditions, broadening the application range of superconducting magnets and enabling them to adapt to complex environments.

[0038] During the manufacturing process of the shielded coil, the precisely cut return groove 7 allows for more accurate and convenient placement of the return segment 5, eliminating the need for complex installation tools and processes, thus reducing installation difficulty. Because the polyester fiberglass cloth material is soft, it easily conforms to the shape of the superconducting wire during installation, reducing the risk of damage to the shielded lead and other components during the installation process.

[0039] The return segment 5 of the shielded coil is subjected to mechanical forces during actual operation, such as pulling during installation and compression caused by changes in the external environment. High-strength polyester fiberglass cloth material can better resist these external forces from damaging the return segment 5. The return protection layer 6, made of polyester fiberglass cloth, enhances the protection of the return segment 5, improving its reliability and stability. The return protection layer 6, made of polyester fiberglass cloth, has high-temperature resistance, ensuring that the polyester fiberglass cloth will not be damaged or degraded due to high temperatures, thus continuously protecting the return segment 5.

[0040] In this preferred embodiment, the outer side of the shielding coil 2 is sequentially provided with an annular layer of glass fiber cloth tape, a copper tape layer, and a stainless steel wire layer; the return line protection layer 6 is located inside the glass fiber cloth tape layer. The glass fiber cloth tape layer can be wound six to ten times according to actual needs. The copper tape layer is made of pure copper.

[0041] In summary, this utility model provides a shielded coil structure for a superconducting magnet. By setting a return line protection layer at the return line segment of the shielded coil, it can prevent return line distortion of the shielded coil return line segment during testing or operation of the superconducting magnet, effectively protecting the return line segment, ensuring the stability, reliability, and adaptability of the superconducting magnet, and has the advantages of enhanced protection performance, adaptability to complex environments, and ease of installation and maintenance.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shielded coil structure for a superconducting magnet, characterized in that: It includes a coil slot (1) and a shielded coil (2) disposed in the coil slot (1); the shielded coil (2) includes an inlet section (4) and a return section (5); The return line segment (5) of the shielded coil (2) is located on the outer side of the shielded coil (2); a return line protection layer (6) is provided on the outer side of the shielded coil (2) at the position corresponding to the inlet / outlet port (3), and a return line groove (7) is provided on the return line protection layer (6), with the return line segment (5) located in the return line groove (7).

2. The shielded coil structure of the superconducting magnet as described in claim 1, characterized in that: The return line protection layer (6) is a flexible layer.

3. The shielded coil structure of the superconducting magnet as described in claim 1, characterized in that: The return line protection layer (6) is made of multiple layers of polyester fiberglass cloth, and the width of the return line protection layer (6) is adapted to the width of the coil groove (1).

4. The shielded coil structure of the superconducting magnet as described in claim 3, characterized in that: The depth of the return groove (7) is not less than the thickness of the return segment (5).

5. The shielded coil structure of the superconducting magnet as described in claim 3, characterized in that: The multiple layers of polyester fiberglass cloth in the return line protection layer (6) have different lengths, with the innermost layer having the longest length and the length of the polyester fiberglass cloth decreasing sequentially from the inside out.

6. The shielded coil structure of the superconducting magnet as described in claim 5, characterized in that: The return line protection layer (6) is thick in the middle and thin at both ends, and the return line groove (7) is provided at the position where the thickness of the return line protection layer (6) is the greatest.

7. The shielded coil structure of the superconducting magnet as described in any one of claims 1 to 6, characterized in that: The dimensions and orientation of the return groove (7) are compatible with the dimensions and orientation of the return segment (5).

8. The shielded coil structure of the superconducting magnet as described in any one of claims 1 to 6, characterized in that: The coil slot (1) is provided with an inlet / outlet port (3), which is located on the side of the coil slot (1). The inlet section (4) and return section (5) of the shielded coil (2) enter and exit the coil slot (1) through the inlet / outlet port (3).

9. The shielded coil structure of the superconducting magnet as described in any one of claims 1 to 6, characterized in that: The outer side of the shielding coil (2) is provided with an annular glass fiber cloth tape layer, a copper tape layer and a stainless steel wire layer in sequence; the return line protection layer (6) is located inside the glass fiber cloth tape layer.

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