Superconducting magnet, its cryogenic installation assembly, and magnetic resonance imaging system

Abstract

The utility model provides a kind of refrigerator mounting assembly (100) of superconducting magnet, it includes sleeve body (10) and support heat conducting part (20). Sleeve body (10) is used to install refrigerator (200) and contains the cold output unit (B) of refrigerator (200). Sleeve body (10) has heat conducting unit (A) for heat exchange.Support heat conducting part (20) includes mutually connected support shaft (21) and contact piece (23), support shaft (21) is sealingly worn in heat conducting unit (A), contact piece (23) can abut against cold output unit, to enable cold output unit (B) to be realized with heat conducting unit (A) by support heat conducting part (20) heat exchange.The refrigerator mounting assembly is conducive to guaranteeing the effective contact of the cold output unit of refrigerator and refrigerator mounting assembly.In addition, superconducting magnet and magnetic resonance imaging system are also provided.

Description

Technical Field

[0001] This utility model relates to the field of magnetic resonance imaging, and more particularly to a refrigerator mounting assembly for a superconducting magnet, and a superconducting magnet and a magnetic resonance imaging system including the refrigerator mounting assembly. Background Technology

[0002] In superconducting magnets of magnetic resonance imaging (MRI) systems, cryogens are commonly used to maintain the cryogenic state of the superconducting magnet's cold load, which primarily includes the superconducting coils. Examples of cryogens include GM cryogens. The cryogen is mounted on the vacuum container of the superconducting magnet via a cryogen mounting assembly. The cryogen first transfers cooling energy to the cryogen mounting assembly, which then transfers the cooling energy to the cold load. Currently, the two cold heads of the cryogen's cooling output unit achieve thermal contact by abutting against two fixed heat-conducting blocks on the cryogen mounting assembly. However, this method requires high dimensional accuracy and makes it difficult to ensure effective contact between both cold heads and the cryogen mounting assembly. Utility Model Content

[0003] The purpose of this invention is to provide a refrigerator mounting assembly for a superconducting magnet, which facilitates effective contact between the refrigerator's cooling output unit and the refrigerator mounting assembly.

[0004] Another objective of this invention is to provide a superconducting magnet that facilitates effective contact between the cooling output unit of the refrigerator and the refrigerator mounting components.

[0005] Another objective of this invention is to provide a magnetic resonance imaging system that facilitates effective contact between the cooling output unit of the refrigerator and the refrigerator mounting components.

[0006] This invention provides a refrigerator mounting assembly for a superconducting magnet, comprising a sleeve and a supporting heat-conducting component. The sleeve is used to mount the refrigerator and house its cooling output unit. The sleeve has a heat-conducting unit for heat exchange. The supporting heat-conducting component includes a support shaft and a contact member connected to each other. The support shaft passes through the heat-conducting unit in a sealed manner, and the contact member can abut against the cooling output unit, so that the cooling output unit can exchange heat with the heat-conducting unit through the supporting heat-conducting component.

[0007] The superconducting magnet refrigerator mounting assembly of this invention helps to ensure effective contact between the cooling capacity output unit of the refrigerator and the refrigerator mounting assembly.

[0008] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the vacuum container of the superconducting magnet has a through hole axially opposite to the support shaft. The refrigerator mounting assembly also includes an operating member. The operating member and the support shaft are located on opposite sides of the through hole, and the operating member is movable along the through hole to be detachably connected to one end of the support shaft that protrudes from the sleeve. This allows the position of the supporting heat-conducting element to be adjusted from the outside of the vacuum container.

[0009] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the cooling output unit of the refrigerator includes a primary cold head and a secondary cold head. The heat conduction unit includes a first heat conduction block and a second heat conduction block. The first heat conduction block transfers the cooling output from the primary cold head to the outer casing. The second heat conduction block transfers the cooling output from the secondary cold head to the outer casing. At least one supporting heat conduction element is threadedly connected to the first heat conduction block and can abut against the primary cold head along the thread axial direction. This facilitates ensuring that both cold heads of the refrigerator are in effective contact with the refrigerator mounting assembly.

[0010] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the cooling output unit of the refrigerator includes a primary cold head and a secondary cold head. The heat conduction unit includes a first heat conduction block and a second heat conduction block. The first heat conduction block transfers the cooling output from the primary cold head to the outer casing. The second heat conduction block transfers the cooling output from the secondary cold head to the outer casing. At least one supporting heat conduction element is threadedly connected to the second heat conduction block and can abut against the secondary cold head along the thread axial direction. This facilitates ensuring that both cold heads of the refrigerator are in effective contact with the refrigerator mounting assembly.

[0011] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, a primary cold head and a secondary cold head are arranged sequentially along the assembly direction of the refrigerator, with the secondary cold head located at the end of the refrigerator along the assembly direction. A first heat-conducting block is disposed on the pointing side of the primary cold head along the assembly direction. The primary cold head abuts against the first heat-conducting block along the assembly direction to achieve thermal conductive contact. A second heat-conducting block is disposed on the pointing side of the secondary cold head along the assembly direction. A supporting heat-conducting component is threadedly connected to the second heat-conducting block, with the thread axis parallel to the assembly direction. The supporting heat-conducting component can abut against the secondary cold head in the opposite direction of the assembly direction to achieve thermal conductive contact. This facilitates the improvement of the overall structural stability of the refrigerator and the refrigerator mounting assembly after assembly.

[0012] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, a support shaft is sealed through and threadedly connected to the second heat-conducting block. The contact element can abut against the secondary cold head in the opposite direction of the assembly direction to achieve thermally conductive contact. This structure is simple and easy to manufacture.

[0013] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the second heat-conducting block has a through mounting hole along the assembly direction. A support shaft passes through the mounting hole. The mounting hole includes a connecting hole section and a sealing hole section arranged sequentially along the assembly direction. The support shaft includes a connecting section and a sealing section arranged sequentially along the assembly direction. The hole wall of the connecting hole section is threadedly connected to the connecting section. The refrigerator mounting assembly provides a sealing ring between the hole wall of the sealing hole section and the sealing section to seal the gap between them. This helps to improve stability and sealing performance.

[0014] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the refrigerator mounting assembly further includes a seal. The seal is used to securely connect the vacuum container to the outside of the vacuum container. The seal has an operating hole opposite to the support shaft along its axial direction. The operating member is sealed into the operating hole and can slide within the operating hole in a direction parallel to the axial direction of the support shaft to switch between a position connected to the support shaft and a position disconnected from the support shaft. This allows adjustment of the position of the supporting heat-conducting element from the outside of the vacuum container without affecting the vacuum state inside the vacuum container.

[0015] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the sealing element includes a tubular neck and a first flange. One end of the neck is used to seal the connection to a vacuum container, and the other end is connected to the first flange. The axis of the first flange coincides with the axis of the support shaft. An operating member passes through the first flange and is inserted into the neck. The refrigerator mounting assembly provides a sealing ring between the neck and the operating member to close the gap between them. The operating member has a second flange coaxially arranged with the first flange. The refrigerator mounting assembly also includes a fixing unit. The fixing unit includes a fixing bolt, a first nut, and a second nut. The fixing bolt can pass through the first flange and be threaded to the second flange. The nut of the fixing bolt is located on the side of the second flange opposite to the first flange. The first nut and the second nut can be threaded to the fixing bolt and clamp the first flange to fix the relative position of the first flange and the second flange. This fixing unit has a simple structure, which helps to reduce costs.

[0016] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the sleeve further includes a first mounting flange. The refrigerator passes through the central hole of the first mounting flange. A sealing ring is provided between the wall of the central hole of the first mounting flange and the refrigerator to seal the gap between them. The refrigerator has a second mounting flange coaxial with the first mounting flange. The refrigerator mounting assembly also includes mounting bolts. The mounting bolts can pass through the second mounting flange and threadedly connect to the first mounting flange, so that the first-stage cold head abuts against the first heat-conducting block along the assembly direction. This structure is simple and easy to assemble.

[0017] In another illustrative embodiment of the refrigerator mounting assembly for the superconducting magnet, the refrigerator mounting assembly further includes a flexible heat-conducting element. The flexible heat-conducting element connects the heat-conducting unit and the supporting heat-conducting element for heat transfer. The flexible heat-conducting element is deformable to accommodate changes in the position of the supporting heat-conducting element relative to the heat-conducting unit. This facilitates improved heat conduction efficiency.

[0018] This invention also provides a superconducting magnet, which includes the aforementioned refrigerator mounting assembly. This superconducting magnet facilitates effective contact between the refrigerator's cooling output unit and the refrigerator mounting assembly.

[0019] This invention also provides a magnetic resonance imaging system, which includes the aforementioned superconducting magnet. The superconducting magnet in this magnetic resonance imaging system facilitates effective contact between the cooling output unit of the refrigerator and the refrigerator mounting components. Attached Figure Description

[0020] The following figures are for illustrative purposes only and do not limit the scope of the present invention.

[0021] Figure 1 This is a schematic structural diagram illustrating one embodiment of a refrigerator mounting assembly for a superconducting magnet.

[0022] Figure 2 For explanation Figure 1 The illustration shows a schematic usage scenario of the refrigeration unit mounting components.

[0023] Figure 3 for Figure 1 The diagram shows the exploded state of the second heat-conducting block and the supporting heat-conducting component.

[0024] Figure 4 for Figure 1 A magnified view of a portion of the central IV region.

[0025] Figures 5 to 7 for Figure 4 A schematic diagram showing the changing states of the structure.

[0026] Label Explanation

[0027] 100 Refrigeration Unit Installation Components

[0028] 10 sets of body

[0029] A thermal conductive unit

[0030] 11 First heat-conducting block

[0031] 12 Second heat-conducting block

[0032] 121 Assembly hole

[0033] P1 Connecting hole section

[0034] P2 Sealing section

[0035] 15 First mounting flange

[0036] 20 Supporting heat-conducting components

[0037] 21 Support shaft

[0038] P3 Connector

[0039] P4 Sealing Section

[0040] 23 Contacts

[0041] 30 Operating components

[0042] 32 Second flange

[0043] 40 Seals

[0044] 41 Operating Hole

[0045] 42 Neck

[0046] 43 First flange

[0047] 50 sealing ring

[0048] 60 fixed units

[0049] 61 Fixing bolts

[0050] 62 First Nut

[0051] 63 Second Nut

[0052] 70 mounting bolts

[0053] 80 Flexible thermal conductive components

[0054] 200 Refrigeration unit

[0055] B Cooling output unit

[0056] 201 Level 1 Cooling Head

[0057] 202 Level 2 Cooling Block

[0058] 205 Second Installation Flange

[0059] 300 vacuum container

[0060] 301 through hole

[0061] Z Assembly Direction Detailed Implementation

[0062] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments of the present utility model are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0063] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0064] In this document, terms such as "first" and "second" do not indicate their importance or order, but are only used to distinguish them to facilitate the description of the document.

[0065] To keep the drawings simple, each drawing only schematically shows the parts related to this utility model, and they do not represent the actual structure of the product.

[0066] Figure 1 This is a schematic structural diagram illustrating one embodiment of a refrigerator mounting assembly for a superconducting magnet. The superconducting magnet, for example, provides a magnetic field for magnetic resonance imaging as part of a medical magnetic resonance imaging system. For ease of distinction, Figure 1 The refrigeration unit mounting assembly 100 is drawn with solid lines, while the remaining structures are drawn with dashed lines. Among them, Figure 1 The refrigerator 200 for the superconducting magnet is shown in dashed lines. The refrigerator 200 is used to generate cooling capacity, and it is, for example, a GM refrigerator, but is not limited to this. The refrigerator 200 includes a cooling capacity output unit B, which is used to output cooling capacity.

[0067] like Figure 1 As shown, the refrigerator mounting assembly 100 includes a sleeve 10 and a supporting heat-conducting component 20. The sleeve 10 is used to mount the refrigerator 200 and accommodate the cooling capacity output unit B of the refrigerator 200. Figure 1 The refrigeration unit 200 and the refrigeration unit mounting assembly 100 are in the assembled state. Specifically, the sleeve 10, for example, forms a cavity and has a mounting hole communicating with the cavity. The refrigeration unit 200 is inserted into the cavity through the mounting hole and closes the mounting hole after insertion.

[0068] like Figure 1 As shown, the sleeve 10 has a heat-conducting unit A for heat exchange. The heat-conducting unit A is used to transfer the cooling output from the cooling output unit B.

[0069] Figure 2 For explanation Figure 1 The illustration shows a schematic application scenario for the refrigeration unit mounting components. For example... Figure 1 and Figure 2As shown, when the refrigerator mounting assembly 100 is applied to a superconducting magnet, its sleeve 10 is fixed to the vacuum container 300 of the superconducting magnet by welding, and its heat-conducting unit A is located inside the vacuum container 300 to transfer cold energy to the cold load inside the vacuum container 300. Figure 1 The diagram also schematically illustrates a partial structure of the vacuum container 300.

[0070] Specifically, such as Figure 1 As shown in this illustrative embodiment, the cooling capacity output unit B of the refrigerator 200 includes a primary cooling head 201 and a secondary cooling head 202. The primary cooling head 201 and the secondary cooling head 202 are arranged sequentially along the assembly direction Z of the refrigerator 200, and the secondary cooling head 202 is located at the end of the refrigerator 200 along the assembly direction Z (i.e., Figure 1 (Lower end of the middle). When the refrigerator 200 is working normally, the temperature of the secondary cold head 202 is, for example, lower than the temperature of the primary cold head 201. The heat conduction unit A includes a first heat conduction block 11 and a second heat conduction block 12. The first heat conduction block 11 is used to transfer the cooling output from the primary cold head 201 to the outside of the sleeve 10. The second heat conduction block 12 is used to transfer the cooling output from the secondary cold head 202 to the outside of the sleeve 10. The first heat conduction block 11 is located on the side of the primary cold head 201 along the assembly direction Z (i.e., the lower end of the sleeve 10). Figure 1 (Lower side of the middle). The primary cold head 201 abuts against the first heat-conducting block 11 along the assembly direction Z to achieve thermal contact. The contact between the primary cold head 201 and the first heat-conducting block 11 is, for example, a surface-to-surface contact, which is beneficial to improving thermal conductivity. The second heat-conducting block 12 is disposed on the side of the secondary cold head 202 along the assembly direction Z (i.e., the lower side of the secondary cold head 202). Figure 1 (The lower side of the middle).

[0071] like Figure 1 As shown in this illustrative embodiment, the heat-conducting support 20 includes a support shaft 21 and a contact member 23 connected to each other. The support shaft 21 is sealed through the second heat-conducting block 12 and can change position relative to the second heat-conducting block 12 along its axial direction. Figure 1 The axis of the support shaft 21 is indicated by a dashed line. In this illustrative embodiment, it is parallel to the assembly direction Z of the refrigerator 200, but is not limited thereto. The contact member 23 can abut against the secondary cold head 202 in the opposite direction of the assembly direction Z, so that the secondary cold head 202 can exchange heat with the second heat-conducting block 12 through the support heat-conducting member 20. The contact between the contact member 23 and the secondary cold head 202 is, for example, a surface-to-surface contact, which is beneficial to improving heat conduction efficiency. The contact member 23 is, for example, a copper plate, which is beneficial to improving heat conduction efficiency, but is not limited thereto. In this illustrative embodiment, the support shaft 21 and the second heat-conducting block 12 are connected by threads, for example, a self-locking thread, to facilitate maintaining the position of the support heat-conducting member 20 during use, but is not limited thereto.

[0072] One end of the support shaft 21 protrudes from the second heat-conducting block 12, for example, located outside the sleeve 10, for operation, thereby facilitating adjustment of the position of the support heat-conducting element 20. The support shaft 21 and the contact element 23 are fixed together, for example, by welding, but not limited to this. In other illustrative embodiments, the contact element 23 may also be rotatably connected to one end of the support shaft 21, and the axis of rotation may coincide with the thread axis of the support shaft 21, to avoid frictional loss between the contact element 23 and the secondary cold head 202.

[0073] Figure 3 for Figure 1 The diagram shows the exploded view of the second heat-conducting block and the supporting heat-conducting component. Specifically, as shown... Figure 3 As shown, in this illustrative embodiment, the second heat-conducting block 12 has a through-hole 121 along the assembly direction Z. The support shaft 21 passes through the assembly hole 121. The assembly hole 121 includes a connecting hole section P1 and a sealing hole section P2 arranged sequentially along the assembly direction Z. The support shaft 21 includes a connecting section P3 and a sealing section P4 arranged sequentially along the assembly direction Z. The wall of the connecting hole section P1 is threadedly connected to the connecting section P3. The refrigerator mounting assembly 100 provides a sealing ring 50 between the wall of the sealing hole section P2 and the sealing section P4 to seal the gap between them, thereby effectively maintaining the sealed state of the space inside the sleeve 10 during the spiral rotation of the supporting heat-conducting component 20. This improves stability and sealing performance. However, this is not the only possibility; in other illustrative embodiments, the mating structure of the second heat-conducting block 12 and the support shaft 21 can also be other forms.

[0074] like Figure 1 As shown in this illustrative embodiment, the refrigerator mounting assembly 100 further includes several flexible heat-conducting elements 80. Each flexible heat-conducting element 80 connects the second heat-conducting block 12 and the contact element 23 for heat transfer. The flexible heat-conducting element 80 is deformable to accommodate changes in the position of the supporting heat-conducting element 20 relative to the second heat-conducting block 12. The flexible heat-conducting element 80 facilitates improved efficiency in the transfer of cooling energy from the supporting heat-conducting element 20 to the second heat-conducting block 12, but is not limited thereto. In other illustrative embodiments, the flexible heat-conducting elements 80 may be omitted, and cooling energy may be transferred to the second heat-conducting block 12 solely through the supporting heat-conducting element 20 itself. In the illustrative embodiment, the number of flexible heat-conducting elements 80 can be adjusted as needed. The flexible heat-conducting element 80 is, for example, copper braided fabric, but is not limited thereto.

[0075] During the installation of the refrigeration unit 200 onto the refrigeration unit mounting assembly 100, for example, firstly, the primary cold head 201 is ensured to abut against the first heat-conducting block 11 along the assembly direction Z. Then, based on the actual position of the secondary cold head 202, the position of the supporting heat-conducting component 20 is adjusted so that the supporting heat-conducting component 20 abuts against the secondary cold head 202 in the opposite direction of the assembly direction Z. Since the position of the supporting heat-conducting component 20 is adjustable, it can adapt to different processing errors and dimensional changes caused by thermal expansion and contraction. That is, the problem of poor contact caused by processing errors and thermal expansion and contraction can be avoided by adjusting the position of the supporting heat-conducting component 20. This helps to ensure effective contact between the refrigeration unit's cooling capacity output unit and the refrigeration unit mounting assembly.

[0076] In other illustrative embodiments, multiple supporting heat-conducting elements 20 may also be provided, which are connected to the second heat-conducting block 12 and can abut against the secondary cold head 202.

[0077] In other illustrative embodiments, one or more supporting heat-conducting elements 20 connected to the first heat-conducting block 11 and capable of abutting against the primary cold head 201 can also be added. In this case, during the installation of the refrigerator 200 onto the refrigerator mounting assembly 100, the positions of the supporting heat-conducting elements 20 connected to the first heat-conducting block 11 and the second heat-conducting block 12 can be adjusted until they abut against the primary cold head 201 and the secondary cold head 202, respectively, thereby facilitating effective contact between the refrigerator's cooling output unit and the refrigerator mounting assembly. In this case, cooling is transferred between the first heat-conducting block 11 and the primary cold head 201, and between the second heat-conducting block 12 and the secondary cold head 202, through the supporting heat-conducting elements 20, eliminating the need to first ensure that the primary cold head 201 abuts against the first heat-conducting block 11 during installation.

[0078] In other illustrative embodiments, one or more supporting heat-conducting components 20 may be connected to the first heat-conducting block 11 and able to abut against the first-stage cold head 201, without providing supporting heat-conducting components 20 connected to the second heat-conducting block 12. In this case, during the installation of the refrigerator 200 onto the refrigerator mounting assembly 100, for example, firstly, the second-stage cold head 202 is ensured to abut against the second heat-conducting block 12 to achieve thermal contact, and then the position of the supporting heat-conducting component 20 is adjusted according to the actual position of the first-stage cold head 201 so that the supporting heat-conducting component 20 abuts against the first-stage cold head 201, thereby facilitating effective contact between the refrigerator's cooling capacity output unit and the refrigerator mounting assembly.

[0079] In other illustrative embodiments, the cooling output unit B may have only one cold head, and the heat conduction unit A may have only one heat conduction block. The supporting heat conduction element 20 is connected to the heat conduction block and can abut against the cold head. In this case, during the installation of the refrigerator 200 onto the refrigerator mounting assembly 100, the position of the supporting heat conduction element 20 can be adjusted until it abuts against the cold head, thereby ensuring effective contact between the cooling output unit of the refrigerator and the refrigerator mounting assembly.

[0080] like Figure 1 As shown in this illustrative embodiment, the supporting heat-conducting component 20 can abut against the secondary cold head 202 in the opposite direction to the assembly direction Z to achieve thermal contact. This is in the same direction as the force exerted by the first heat-conducting block 11 on the primary cold head 201, thereby improving the overall structural stability of the refrigerator and its mounting components after assembly. In other illustrative embodiments, the abutting direction of the supporting heat-conducting component 20 can be adjusted as needed and is not limited to the angle defined in the specific embodiments described above.

[0081] Figure 4 for Figure 1 A magnified view of a portion of the central IV region. (See diagram below.) Figure 4 As shown in the schematic embodiment, the vacuum container 300 of the superconducting magnet has a through hole 301 that is axially opposite to the support shaft 21. The refrigerator mounting assembly 100 also includes an operating member 30. The operating member 30 and the support shaft 21 are located on opposite sides of the through hole 301, and the operating member 30 is movable along the through hole 301 to be detachably connected to one end of the support shaft 21 that protrudes from the sleeve 10. This allows the position of the supporting heat-conducting component to be adjusted from the outside of the vacuum container. Specifically, the end of the support shaft 21 that protrudes from the sleeve 10 can, for example, form a pluggable key engagement with the operating member 30, but is not limited thereto. The end of the support shaft 21 is, for example, shaped like an external hexagonal prism. The operating member 30, for example, has a groove that matches the external hexagonal prism structure.

[0082] like Figure 4 As shown, in the illustrative embodiment, the refrigerator mounting assembly 100 further includes a seal 40. The seal 40 is used to securely connect the vacuum container 300 to the outside of the vacuum container 300. The seal 40 has an operating hole 41 opposite to the support shaft 21 along its axial direction. An operating member 30 is sealingly inserted into the operating hole 41, and the portion of the operating member 30 located outside the operating hole 41 is operable. The operating member 30 is slidable within the operating hole 41 in a direction parallel to the axial direction of the support shaft 21 to switch between a position connected to the support shaft 21 and a position disconnected from the support shaft 21. Figure 4 The image shows the disengaged state. Figure 5(The diagram shows the connected state). The operating element 30 can also rotate within the operating hole 41 about the threaded axis of the support shaft 21, for example, to drive the support shaft 21 to rotate helically when connected. Figure 5 and Figure 6 The diagram shows the positional change of the supporting heat-conducting element 20 before and after the operating element 30 drives the supporting shaft 21 to rotate, with the supporting shaft 21 engaged. This allows the position of the supporting heat-conducting element 20 to be adjusted from the outside of the vacuum container 300 without affecting the vacuum state inside the vacuum container 300. After adjustment, the operating element 30 can be disengaged from the supporting shaft 21, thereby preventing the loss of cooling energy through the operating element 30.

[0083] like Figure 4 As shown, in the schematic embodiment, the seal 40 includes a tubular neck 42 and a first flange 43. One end of the neck 42 (i.e. Figure 4 The upper end of the middle section is used to seal and connect the vacuum container 300, and the other end (i.e. Figure 4 The lower end of the support shaft 21 is connected to the first flange 43. The axis of the first flange 43 coincides with the axis of the support shaft 21. The operating member 30 passes through the first flange 43 and is inserted into the neck 42. The refrigeration unit mounting assembly 100 provides a sealing ring 50 between the neck 42 and the operating member 30 to seal the gap between them. The operating member 30 has a second flange 32 coaxially arranged with the first flange 43. The refrigeration unit mounting assembly 100 also includes several fixing units 60. Each fixing unit 60 includes a fixing bolt 61, a first nut 62 and a second nut 63. The fixing bolt 61 can pass through the first flange 43 and be threaded to the second flange 32. The nut of the fixing bolt 61 is located on the side of the second flange 32 opposite to the first flange 43. The first nut 62 and the second nut 63 can be threaded to the fixing bolt 61 and clamp the first flange 43 to fix the relative position of the first flange 43 and the second flange 32. Therefore, after adjustment, the position of the operating component 30 can be fixed by the fixing unit 60 to prevent the operating component 30 from falling off or moving into the vacuum container 300 under negative pressure and contacting the support shaft 21. Figure 4 and Figure 7 Both images show the operating element 30 being fixed by the fixing unit 60 in a state detached from the support shaft 21. Figure 4 The middle contact 23 abuts against the secondary cold head 202. Figure 7 (The intermediate contact 23 is separated from the secondary cold head 202). This fixing unit has a simple structure, which helps to reduce costs, but it is not limited to this. In other illustrative embodiments, the position of the operating member 30 relative to the seal 40 can also be fixed by other structures.

[0084] like Figure 1As shown, in the illustrative embodiment, the sleeve 10 also includes a first mounting flange 15. The central hole of the first mounting flange 15 is the mounting hole for mounting the refrigerator 200 on the sleeve 10. A sealing ring 50 is provided between the wall of the central hole of the first mounting flange 15 and the refrigerator 200 in the refrigerator mounting assembly 100 to seal the gap between them, thereby facilitating the maintenance of a closed state of the internal space of the sleeve 10. The refrigerator 200 has a second mounting flange 205 coaxial with the first mounting flange 15. The refrigerator mounting assembly 100 also includes several mounting bolts 70. Each mounting bolt 70 can pass through the second mounting flange 205 and be threaded to the first mounting flange 15. The mounting bolt 70 can abut against the second mounting flange 205 through its nut, so that the first-stage cold head 201 abuts against the first heat-conducting block 11 in the assembly direction Z. This structure is simple and easy to assemble.

[0085] The following example illustrates the use of the refrigeration unit mounting assembly 100 in this illustrative embodiment, but it is not intended to limit the scope of protection of this utility model.

[0086] During installation of the refrigeration unit 200, first insert the refrigeration unit 200 into the housing 10, then install the mounting bolts 70 until the primary cold head 201 abuts against the first heat-conducting block 11 along the assembly direction Z and the mounting bolts 70 reach the set torque requirement. Next, remove the fixing unit 60, operate the operating component 30 to connect it to the support shaft 21, and drive the support shaft 21 to rotate spirally until the contact component 23 abuts against the secondary cold head 202 and the support shaft 21 reaches the set torque requirement. Then, operate the operating component 30 to disengage it from the support shaft 21. Finally, install the fixing unit 60, keeping the operating component 30 in the disengaged state from the support shaft 21. This establishes a cooling capacity transfer path between the refrigeration unit 200 and the refrigeration unit mounting assembly 100. During the process, the mounting bolts 70 and the support shaft 21 may need to be repeatedly adjusted to meet the torque requirements.

[0087] During use, if the contact between the first-stage cold head 201 and the first heat-conducting block 11 or between the second-stage cold head 202 and the contact element 23 deteriorates due to thermal expansion and contraction (manifesting as torque loss), the mounting bolts 70 and the support shaft 21 can be adjusted accordingly until the set torque requirements are met to ensure good thermal contact.

[0088] In cases where the refrigeration unit 200 shuts down due to transportation requirements, unexpected power outages, or other reasons, it is necessary to disconnect the cold energy transfer path between the refrigeration unit 200 and the refrigeration unit mounting assembly 100 to reduce cold energy loss. In this case, first remove the mounting bolts 70 and the fixing unit 60. Operate the operating component 30 to drive the supporting heat-conducting component 20, thereby pushing the secondary cold head 202 to move in the opposite direction of the assembly direction Z, thus separating the primary cold head 201 from the first heat-conducting block 11. Then, insert a gasket between the first mounting flange 15 and the second mounting flange 205, and then reinstall the mounting bolts 70 to keep the primary cold head 201 separated from the first heat-conducting block 11. Next, operate the operating component 30 to separate the contact component 23 from the secondary cold head 202, and then operate the operating component 30 to disengage it from the support shaft 21. Finally, install the fixing unit 60 to keep the operating component 30 disengaged from the support shaft 21. This disconnects the cold energy transfer path between the refrigeration unit 200 and the refrigeration unit mounting assembly 100. To restore the cold energy transfer path, simply reverse the operation. This allows for easy connection and disconnection of the cooling energy transfer path between the refrigeration unit 200 and the refrigeration unit mounting assembly 100. Of course, in some cases, the thermal contact between the primary cooling head 201 and the first heat-conducting block 11 can be maintained, and only the contact element 23 can be separated from the secondary cooling head 202 to reduce the loss of cooling energy.

[0089] This invention also provides a superconducting magnet, in one illustrative embodiment of which includes the aforementioned refrigerator mounting assembly 100, the aforementioned refrigerator 200, the aforementioned vacuum container 300, and a cold load located within the vacuum container 300, the cold load including but not limited to a superconducting coil. This superconducting magnet facilitates effective contact between the refrigerator's cooling output unit and the refrigerator mounting assembly.

[0090] This invention also provides a magnetic resonance imaging system, in one illustrative embodiment of which includes the aforementioned superconducting magnet. The superconducting magnet in this magnetic resonance imaging system facilitates effective contact between the cooling output unit of the refrigerator and the refrigerator mounting components.

[0091] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0092] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent implementation schemes or modifications made without departing from the spirit of the present utility model, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present utility model.

Claims

1. A refrigerator mounting assembly for a superconducting magnet, characterized in that, include: A housing (10) for mounting a refrigeration unit and accommodating the refrigeration unit’s cooling output unit, the housing (10) having a heat-conducting unit (A) for heat exchange; as well as The heat-conducting support (20) includes a support shaft (21) and a contact (23) connected to each other. The support shaft (21) is sealed through the heat-conducting unit (A), and the contact (23) is able to abut against the cold output unit so that the cold output unit can exchange heat with the heat-conducting unit (A) through the heat-conducting support (20).

2. The refrigerator mounting assembly for the superconducting magnet as described in claim 1, characterized in that, The vacuum container (300) of the superconducting magnet has a through hole (301) that is axially opposite to the support shaft (21). The refrigerator mounting assembly also includes an operating member (30). The operating member (30) and the support shaft (21) are located on opposite sides of the through hole (301), and the operating member (30) can move along the through hole (301) to be detachably connected to one end of the support shaft (21) that protrudes from the sleeve (10).

3. The refrigerator mounting assembly for the superconducting magnet as described in claim 1, characterized in that, The cooling output unit of the refrigeration unit includes a primary cooling head and a secondary cooling head. The heat conduction unit (A) includes a first heat conduction block (11) and a second heat conduction block (12). The first heat conduction block (11) is used to transfer the cooling output from the primary cooling head to the outside of the sleeve (10), and the second heat conduction block (12) is used to transfer the cooling output from the secondary cooling head to the outside of the sleeve (10). At least one of the said supporting heat-conducting elements (20) is threadedly connected to the first heat-conducting block (11) and is able to abut against the first-stage cold head along the thread axis; and / or At least one of the supporting heat-conducting elements (20) is threadedly connected to the second heat-conducting block (12) and can abut against the secondary cold head along the thread axis.

4. The refrigerator mounting assembly for the superconducting magnet as described in claim 3, characterized in that, The primary and secondary cold heads are arranged sequentially along the assembly direction (Z) of the refrigerator, with the secondary cold head located at the end of the refrigerator along the assembly direction (Z). The first heat-conducting block (11) is located on the pointing side of the primary cold head along the assembly direction (Z). The primary cold head abuts against the first heat-conducting block (11) along the assembly direction (Z) to achieve thermal contact. The second heat-conducting block (12) is located on the pointing side of the secondary cold head along the assembly direction (Z). The supporting heat-conducting component (20) is threadedly connected to the second heat-conducting block (12), and the thread axis is parallel to the assembly direction (Z). The supporting heat-conducting component (20) can abut against the secondary cold head in the opposite direction of the assembly direction (Z) to achieve thermal contact.

5. The refrigerator mounting assembly for the superconducting magnet as described in claim 4, characterized in that, The support shaft (21) is sealed through the second heat-conducting block (12) and threadedly connected to the second heat-conducting block (12). The contact element (23) can abut against the secondary cold head in the opposite direction of the assembly direction (Z) to achieve heat conduction contact.

6. The refrigerator mounting assembly for the superconducting magnet as described in claim 5, characterized in that, The second heat-conducting block (12) has an assembly hole (121) extending along the assembly direction (Z). The support shaft (21) passes through the assembly hole (121). The assembly hole (121) includes a connecting hole section (P1) and a sealing hole section (P2) arranged sequentially along the assembly direction (Z). The support shaft (21) includes a connecting section (P3) and a sealing section (P4) arranged sequentially along the assembly direction (Z). The hole wall of the connecting hole section (P1) is threadedly connected to the connecting section (P3). The refrigerator mounting assembly provides a sealing ring between the hole wall of the sealing hole section (P2) and the sealing section (P4) to seal the gap between them.

7. The refrigerator mounting assembly for the superconducting magnet as described in claim 2, characterized in that, The refrigerator mounting assembly also includes a seal (40) for securing the vacuum container to the outside of the vacuum container. The seal (40) has an operating hole (41) opposite to the support shaft (21) along the axial direction of the support shaft (21). The operating member (30) is sealed into the operating hole (41) and is slidable within the operating hole (41) in a direction parallel to the axial direction of the support shaft (21) to switch between a position connected to the support shaft (21) and a position disconnected from the support shaft (21).

8. The refrigerator mounting assembly for the superconducting magnet as described in claim 7, characterized in that, The sealing element (40) includes a tubular neck (42) and a first flange (43). One end of the neck (42) is used to seal and connect to a vacuum container, and the other end is connected to the first flange (43). The axis of the first flange (43) coincides with the axis of the support shaft (21). The operating element (30) passes through the first flange (43) and is inserted into the neck (42). The refrigerator mounting assembly provides a sealing ring between the neck (42) and the operating element (30) to close the gap between them. The operating element (30) has a second flange (32) coaxially arranged with the first flange (43). The refrigerator... The mounting assembly also includes a fixing unit (60), which includes a fixing bolt (61), a first nut (62), and a second nut (63). The fixing bolt (61) can pass through the first flange (43) and be threaded to the second flange (32). The nut of the fixing bolt (61) is located on the side of the second flange (32) away from the first flange (43). The first nut (62) and the second nut (63) can be threaded to the fixing bolt (61) and clamp the first flange (43) to fix the relative position of the first flange (43) and the second flange (32).

9. The refrigerator mounting assembly for the superconducting magnet as described in claim 4, characterized in that, The sleeve (10) also includes a first mounting flange (15), through which the refrigerator passes. The refrigerator mounting assembly has a sealing ring between the hole wall of the central hole of the first mounting flange (15) and the refrigerator to seal the gap between them. The refrigerator has a second mounting flange coaxial with the first mounting flange (15). The refrigerator mounting assembly also includes mounting bolts (70), which can pass through the second mounting flange and threadedly connect to the first mounting flange (15) so that the first-stage cold head abuts against the first heat-conducting block (11) along the assembly direction (Z).

10. The refrigerator mounting assembly for the superconducting magnet as described in claim 1, characterized in that, The refrigeration unit assembly also includes a flexible heat-conducting element (80) that connects the heat-conducting unit (A) and the supporting heat-conducting element (20) for heat transfer. The flexible heat-conducting element (80) is deformable to accommodate changes in the position of the supporting heat-conducting element (20) relative to the heat-conducting unit (A).

11. A superconducting magnet, characterized in that, Includes the refrigeration unit mounting assembly as described in any one of claims 1 to 10.

12. A magnetic resonance imaging system, characterized in that, Including the superconducting magnet as described in claim 11.

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