Magnet suspension arrangement and magnetic resonance system

Abstract

The utility model provides a kind of magnet suspension device and magnetic resonance system, magnet suspension device includes: support ring, it surrounds inner ring coil and is along outer ring coil arrangement;Support assembly, support assembly is set along the axial direction of support ring, including with the first support assembly of inner ring coil connection and with the second support assembly of outer ring coil connection;Suspension assembly, setting in support ring, including multiple hangers, one end of hanger is fixedly connected with support ring, other end is connected with vacuum tank, inner ring coil and outer ring coil are connected in vacuum tank.The utility model effectively shortens the length of magnet hanger, is convenient for manufacturing and can reduce material cost, so that the cold end of hanger is moved out, cold end interface point is closer to vacuum tank, to provide more optimal magnet frequency, simultaneously, the pre-tightening force transferred to inner ring coil will be reduced, the deformation of inner ring coil will be reduced, to improve magnetic field uniformity.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic resonance equipment technology, specifically relating to a magnet suspension device and a magnetic resonance system. Background Technology

[0002] Superconducting magnets have been widely used in MRI systems due to their high stability and ease of achieving high-intensity magnetic fields. In recent years, magnets using dry cooling technology (known as dry magnets) have become increasingly popular. This technology can significantly reduce costs because it requires almost no helium or helium containers. However, since dry magnets do not have helium containers, they need to be directly fixed to the vacuum chamber. To reduce heat conduction from the vacuum chamber to the magnet, the components connecting the magnet and the vacuum chamber need to have a small cross-section but be sufficiently robust. However, existing components connecting the magnet and the vacuum chamber have a large suspension preload, which can cause coil deformation and thus affect the magnetic field uniformity of the magnet. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a magnet suspension device and a magnetic resonance system to improve the problem that the existing components connecting the magnet and the vacuum tank have a large suspension preload, which will cause coil deformation and thus affect the magnetic field uniformity of the magnet.

[0004] To achieve the above and other related objectives, this utility model proposes a magnet suspension device, comprising:

[0005] A support ring, which surrounds the inner coil and is arranged along the axial direction of the outer coil;

[0006] The support assembly is provided on both sides along the axial direction of the support ring. The support assembly includes a first support assembly and a second support assembly. The first support assembly is connected to the inner coil, and the second support assembly is connected to the outer coil.

[0007] A suspension assembly is disposed on the support ring. The suspension assembly includes multiple suspension members. One end of each suspension member is fixedly connected to the support ring, and the other end is connected to the vacuum tank, connecting the inner coil and the outer coil to the vacuum tank.

[0008] In one embodiment of the present invention, the support ring includes two ring bodies, which are fixedly connected by a plurality of connecting blocks, and the plurality of connecting blocks are evenly distributed along the circumference of the ring bodies.

[0009] In one embodiment of this utility model, the first support component includes:

[0010] An inner support ring is fixedly connected to the inner coil.

[0011] Multiple support members are arranged at circumferential intervals along the inner support ring. One side of each support member is fixedly connected to the support ring, and the other side is fixedly connected to the inner support ring.

[0012] In one embodiment of the present invention, a plurality of the support members are uniformly arranged along the circumference of the inner support ring or symmetrically distributed about the axial direction of the inner support ring.

[0013] In one embodiment of this utility model, the support member is provided with three fixing points, which are respectively fixedly connected to the support ring, the inner support ring and the second support member.

[0014] In one embodiment of this utility model, the second support component includes a plurality of support structures, the support structures including:

[0015] The fastener is connected to the outer coil.

[0016] A connecting rod, one end of which is connected to the fixing member, and the other end of which is connected to the support ring.

[0017] In one embodiment of the present invention, a plurality of the support structures are uniformly arranged along the circumference of the support ring or symmetrically distributed about the axial direction of the support ring.

[0018] In one embodiment of the present invention, the first support component is located on both sides of the support ring and is arranged symmetrically about the support ring, and the second support component is located on both sides of the support ring and is arranged symmetrically about the support ring.

[0019] In one embodiment of the present invention, the suspension members are located on both sides of the axial direction of the support ring and are arranged symmetrically about the support ring, and multiple suspension members in the same suspension assembly are evenly distributed along the circumference of the support ring or symmetrically distributed about the axis of the support ring.

[0020] This invention also proposes a magnetic resonance system, including a magnet suspension device as described in any of the above embodiments.

[0021] This utility model proposes a magnet suspension device and a magnetic resonance system. It uses a support ring to surround the outer side of the inner coil. The first support component supporting the inner coil and the second support component supporting the outer coil are both connected to the support ring, forming a support assembly that supports and fixes the inner and outer coils. At the same time, one end of the suspension component is connected to the support ring and the other end is connected to the vacuum tank, so as to shorten the magnet suspension component, facilitate manufacturing, and reduce material costs.

[0022] This invention proposes a magnet suspension device and a magnetic resonance system. Because the support ring is closer to the vacuum chamber and farther from the inner coil, the end of the suspension component connected to it is moved outward, and the cold end interface point is closer to the vacuum chamber, thereby providing a better magnet frequency. At the same time, the preload transmitted to the inner coil is reduced, and the deformation of the inner coil is reduced, thereby improving the magnetic field uniformity. Furthermore, the support ring can also serve as a mounting bracket for the coil connection components without occupying the space of the inner coil, making the magnet connection design more flexible. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an axonometric schematic diagram of the magnet suspension device in one embodiment of the present invention.

[0025] Figure 2 This is a front view of the magnet suspension device in one embodiment of the present invention.

[0026] Figure 3 A top view of the magnet suspension device in one embodiment of this utility model.

[0027] Label Explanation:

[0028] 100. Magnet suspension device; 10. Support ring; 20. Support assembly; 30. Suspension assembly; 101. Inner coil; 102. Outer coil; 11. Ring body; 12. Connecting block; 211. Inner support ring; 212. Support component; 221. Fixing component; 222. Connecting rod; 31. Suspension component; 13. Connecting seat. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0030] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] In existing technologies, to reduce heat conduction from the vacuum chamber to the magnet, long, small-section magnet suspension components are typically used to fix the magnet to the vacuum chamber. At the cold end, the connection point is usually located on the inner magnet. However, the inventors have found that the length of these suspension components is very long, resulting in high costs. Furthermore, because the connection point is usually located on the inner magnet, the coil, especially the inner coil, deforms after the suspension preload is applied, affecting the magnetic field uniformity of the magnet. Additionally, during the assembly of the cryostat, the suspension device needs to be fixed and unfixed, making assembly difficult and complicating the cold end shell structure. The support structure for the coil and the cold end shell almost occupy all the space of the A / F coil spacer, making coil wiring design very difficult. Moreover, the adjustment range of the suspension angle is very small, leading to frequency reduction in certain directions. Therefore, this invention proposes a magnet suspension device and magnetic resonance system to improve the above problems.

[0032] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the magnet suspension device 100 includes a support ring 10, a support assembly 20, and a suspension assembly 30. The support ring 10 is arranged around the inner coil 101. Support assemblies 20 are provided on both sides of the axial direction of the support ring 10. The support assemblies 20 are used to support and install the inner coil 101 and the outer coil 102. The suspension assemblies 30 are provided on both sides of the axial direction of the support ring 10. The suspension assemblies 30 connect the support ring 10 and the vacuum tank (not shown) to connect the inner coil 101 and the outer coil 102 to the vacuum tank, keeping them at an optimized virtual center. This ensures that the mechanical center, electromagnetic center, and geometric center of the magnet coincide as much as possible, reducing the influence of mechanical stress on the magnetic field.

[0033] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the support ring 10 includes two ring bodies 11 and a plurality of connecting blocks 12 located between the two ring bodies 11. The two ring bodies 11 are fixedly connected by the plurality of connecting blocks 12. The plurality of connecting blocks 12 are evenly distributed along the circumference of the ring bodies 11, which can greatly reduce the weight of the support ring 10 and ensure that the suspension is more reliable and safe.

[0034] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the support component 20 includes a first support component 21 and a second support component 22. The first support component 21 is connected to the inner coil 101 and the ring body 11 of the support ring 10, respectively, and is used to support and fix the inner coil 101. The second support component 22 is connected to the outer coil 102 and the ring body 11 of the support ring 10, respectively, and is used to support and fix the outer coil 10.

[0035] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the first support assembly 21 includes an inner support ring 211 and a plurality of support members 212. The inner support ring 211 is fixedly connected to the inner coil 101, and the plurality of support members 212 are arranged at intervals along the circumference of the inner support ring 211. One side of each support member 212 is fixedly connected to the ring body 11 of the support ring 10, and the other side is fixedly connected to the inner support ring 211, so as to support and fix the inner coil 101. Further, in this embodiment, the plurality of support members 211 are evenly arranged along the circumference of the inner support ring 212, or are arranged symmetrically about the axial direction of the inner support ring 212, so as to ensure that the force applied when supporting and fixing the inner coil 101 is more evenly distributed, ensuring that the suspended inner coil 101 is more reliable and stable, thereby improving the quality of the magnetic field. In this embodiment, the support member 212 is provided with three fixing points. The three fixing points are distributed and fixedly connected to the ring body 11 of the support ring 10, the inner support ring 211, and the second support component 22. For example, the support member 212 can be designed as a triangular structure, which further ensures the reliability and stability of the inner coil 101 through multi-point fixed connection.

[0036] Please see Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, the second support component 22 is configured as multiple support structures. Each support structure includes a fixing member 221 and a connecting rod 222. The fixing member 221 is designed as a hollow frame structure, which is sleeved on the outer coil 102 and connected to the outer coil 102. One end of the connecting rod 222 is connected to the fixing member 221, and the other end is connected to the ring body 11 of the support ring 10. The outer coil 101 is supported and fixed by multiple support structures. Further, in this embodiment, the multiple support structures are evenly arranged along the circumference of the support ring 10, or are configured to be symmetrically distributed about the axial direction of the support ring 10, so as to ensure that the force applied when supporting and fixing the outer coil 102 is more evenly distributed, ensuring that the suspended outer coil 102 is more reliable and stable, thereby improving the quality of the magnetic field. In this embodiment, the connection point between the connecting rod 222 and the support ring 10 is located at the position where the connecting block 12 is set in the support ring 10, thereby improving the connection strength between the second support component 22 and the support ring 10 and ensuring its reliability.

[0037] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the first support component 21 is located on both sides of the support ring 10 and is arranged symmetrically about the support ring 10, and the second support component 22 is located on both sides of the support ring 10 and is arranged symmetrically about the support ring 10, so as to ensure that the inner coil 101 and the outer coil 102 are more reliable and stable after suspension, thereby improving the quality of the magnetic field. It can also be understood that there is a large gap between the support ring 10 and the inner coil 101. By connecting the vacuum tank through the suspension component 30, the support ring 10 is closer to the vacuum tank and farther away from the inner coil 101. At the same time, the support ring 10 can also serve as a mounting bracket for the coil connection component without occupying the space of the inner coil 101, making the magnet connection design more flexible.

[0038] Please see Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, the suspension assembly 30 is provided on both sides of the support ring 10 along its axial direction. The suspension assembly 30 includes multiple suspension members 31. One end of the suspension member 31 is connected to the support ring 10, and the other end is connected to the inner side of the vacuum tank, thereby connecting the inner coil 101 and the outer coil 102 to the vacuum tank. It can be understood that because the support ring 10 is closer to the vacuum tank and farther from the inner coil 101, the length of the magnet suspension member 31 can be effectively shortened, which is convenient for manufacturing and can reduce material costs. At the same time, the cold end of the suspension member 31 is moved outward, and the cold end interface point is closer to the vacuum tank, which can provide a better magnet frequency. In addition, the cold end interface point of the suspension member 31 is connected to the support ring 10, which is farther away from the inner coil 101, effectively reducing the preload transmitted to the inner coil 101 during suspension, effectively avoiding or reducing the deformation of the inner coil 101, thereby improving the magnetic field uniformity.

[0039] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, a connecting seat 13 is provided on the support ring 10, and one end of the suspension member 31 is fixedly connected to the connecting seat 13. For example, the fixed connection can be achieved by means of hooks, pins, etc., which facilitates installation. It can be understood that the inner coil 101 and the outer coil 102 are assembled into an integral structure by the support ring 10 and the support assembly 20. The vacuum tank is connected through the suspension assembly 30. The assembly and connection between the suspension assembly 30 and the support ring 10 is very convenient and reliable, which solves the problem of inconvenience caused by the need to fix and unfix the suspension device during the assembly of the low-temperature thermostat in the traditional structure. In this embodiment, the low-temperature thermostat can be built first and the suspension system can be installed through hooks to effectively reduce the construction time of the magnet.

[0040] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the suspension members 30 are located on both sides of the support ring 10 and are symmetrically arranged about the support ring 10. Multiple suspension members 31 in the same suspension assembly 30 are evenly distributed along the circumference of the support ring 10, or are symmetrically distributed about the axis of the support ring 10. This ensures that after suspension, the overall structure formed by the support ring 10 and the support assembly 20 is subjected to more uniform and stable forces, thereby ensuring that the inner coil 101 and the outer coil 102 are more reliable and stable, thus improving the quality of the magnetic field. In this embodiment, the suspension member 31 is, for example, a metal part with a small cross-section, to ensure its structural strength while reducing heat conduction.

[0041] Please see Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, the present invention also proposes a magnetic resonance system, including a magnet suspension device 100 as described in any of the above embodiments. The magnet suspension device 100 has the same or similar structure as described in the above embodiments, and will not be described again here to avoid repetition.

[0042] This utility model proposes a magnet suspension device and a magnetic resonance system. It uses a support ring to surround the outer side of the inner coil. The first support component supporting the inner coil and the second support component supporting the outer coil are both connected to the support ring, forming a support assembly that supports and fixes the inner and outer coils. At the same time, one end of the suspension component is connected to the support ring and the other end is connected to the vacuum tank, so as to shorten the magnet suspension component, facilitate manufacturing, and reduce material costs.

[0043] This invention proposes a magnet suspension device and a magnetic resonance system. Because the support ring is closer to the vacuum chamber and farther from the inner coil, the end of the suspension component connected to it is moved outward, and the cold end interface point is closer to the vacuum chamber, thereby providing a better magnet frequency. At the same time, the preload transmitted to the inner coil is reduced, and the deformation of the inner coil is reduced, thereby improving the magnetic field uniformity. Furthermore, the support ring can also serve as a mounting bracket for the coil connection components without occupying the space of the inner coil, making the magnet connection design more flexible.

[0044] It should be understood that the references to "an embodiment," "embodiment," or "specific embodiment" throughout this specification mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0045] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0046] The above description is only a preferred embodiment of this application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in this application is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, technical solutions formed by replacing the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0047] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this utility model, the other technical features will not be described in detail here.

Claims

1. A magnet suspension device, characterized in that, include: A support ring, which surrounds the inner coil and is arranged along the axial direction of the outer coil; A support assembly is provided along the axial direction of the support ring. The support assembly includes a first support assembly and a second support assembly. The first support assembly is connected to the inner coil, and the second support assembly is connected to the outer coil. A suspension assembly is disposed on the support ring. The suspension assembly includes multiple suspension members. One end of each suspension member is fixedly connected to the support ring, and the other end is connected to the vacuum tank, connecting the inner coil and the outer coil to the vacuum tank.

2. The magnet suspension device according to claim 1, characterized in that, The support ring includes two ring bodies, which are fixedly connected by a plurality of connecting blocks, which are evenly distributed along the circumference of the ring bodies.

3. The magnet suspension device according to claim 1, characterized in that, The first support component includes: An inner support ring is fixedly connected to the inner coil. Multiple support members are arranged at circumferential intervals along the inner support ring. One side of each support member is fixedly connected to the support ring, and the other side is fixedly connected to the inner support ring.

4. The magnet suspension device according to claim 3, characterized in that, The plurality of the support members are evenly arranged along the circumference of the inner support ring or symmetrically distributed about the axial direction of the inner support ring.

5. The magnet suspension device according to claim 3, characterized in that, The support member is provided with three fixing points, which are respectively fixedly connected to the support ring, the inner support ring and the second support assembly.

6. The magnet suspension device according to claim 1, characterized in that, The second support component includes multiple support structures, the support structures including: The fastener is connected to the outer coil. A connecting rod, one end of which is connected to the fixing member, and the other end of which is connected to the support ring.

7. The magnet suspension device according to claim 6, characterized in that, The plurality of the support structures are arranged uniformly along the circumference of the support ring or symmetrically distributed about the axial direction of the support ring.

8. The magnet suspension device according to claim 1, characterized in that, The first support component is located on both sides of the support ring and is arranged symmetrically about the support ring, and the second support component is located on both sides of the support ring and is arranged symmetrically about the support ring.

9. The magnet suspension device according to claim 1, characterized in that, The suspension components are located on both sides of the support ring and are arranged symmetrically about the support ring, and a plurality of the suspension components are evenly distributed along the circumference of the support ring or symmetrically distributed about the axis of the support ring.

10. A magnetic resonance system, characterized in that, Includes the magnet suspension device as described in any one of claims 1 to 9.

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