A stainless steel skeleton structure with less liquid helium

Abstract

The present application relates to superconducting magnet stainless steel framework structure technical field, disclose a kind of little liquid helium's stainless steel framework structure, including container outer cylinder and main magnetic field stainless steel framework, sealing structure is equipped between the container outer cylinder and main magnetic field stainless steel framework;The sealing structure includes shielding magnetic field coil stainless steel framework, sealing cylinder and framework end cover, the shielding magnetic field coil stainless steel framework is set in the inside of container outer cylinder, sealing end cover is equipped between the shielding magnetic field coil stainless steel framework and the outer end of container outer cylinder, the sealing cylinder is located in the inside of shielding magnetic field coil stainless steel framework, the sealing cylinder and the inner end of shielding magnetic field coil stainless steel framework are sealed by framework end cover;A kind of little liquid helium's stainless steel framework structure provided by the present application, solve the problem of high cost of prior art use.

Description

Technical Field

[0001] This invention relates to the field of stainless steel skeleton structure technology for superconducting magnets, and specifically to a stainless steel skeleton structure with low liquid helium content. Background Technology

[0002] Currently, most high-field superconducting magnets employ cryogenic superconducting magnets. This involves placing the internal superconducting coils in a cryogenic container filled with liquid helium to achieve an ultra-low temperature environment, thus realizing its cryogenic superconducting function. When a superconducting magnet operates under high current in a cryogenic superconducting state, the static magnetic field and electromagnetic force experienced by the internal coils are directly proportional to the magnitude of the current, typically reaching tens of tons. Such a large magnetic force on the coils is transmitted to the supporting frame, requiring the frame to possess sufficient mechanical strength and resistance to compression and shear to prevent deformation caused by excessive magnetic force. Currently, most manufacturers use non-magnetic stainless steel, aluminum, and composite materials to construct the main coil frame and the shielding coil frame. Beam or stiffening plate structures are used as the connecting supports between the main frame and the shielding coil frame, and this structure is then sealed using inner and outer cylinders, end flanges, or caps to form a cryogenic container.

[0003] Existing superconducting magnet stainless steel framework structures, such as Figure 1 As shown, most of them are composed of a main magnetic field stainless steel frame 1′, two shielded magnetic field coil stainless steel frames 2′, two end plates 3′ and an outer cylinder 4′. The main magnetic field stainless steel frame 1′ is arranged horizontally. The shielded magnetic field coil stainless steel frames 2′, which serve as shielding coils, are supported and fixed on both sides of the main magnetic field stainless steel frame 1′ by the two end plates 3′ respectively. Then, by connecting the outer cylinder 4′, a complete sealed container is formed.

[0004] The existing design has the following problems: the internal cavity of the container is large, and the volume of liquid helium to be filled is also large. Since liquid helium is a non-renewable and scarce resource, its market price is extremely expensive, thus increasing the cost of use. Summary of the Invention

[0005] The purpose of this invention is to provide a stainless steel skeleton structure with low liquid helium content, in order to solve at least one of the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A stainless steel skeleton structure with low liquid helium content includes an outer cylinder of a container and a stainless steel skeleton for the main magnetic field, wherein a sealing structure is provided between the outer cylinder of the container and the stainless steel skeleton for the main magnetic field.

[0008] The sealing structure includes a stainless steel skeleton for shielding the magnetic field coil, a sealing cylinder, and a skeleton end cap. The stainless steel skeleton for shielding the magnetic field coil is disposed inside the outer cylinder of the container. A sealing end cap is provided between the stainless steel skeleton for shielding the magnetic field coil and the outer end of the outer cylinder of the container. The sealing cylinder is located inside the stainless steel skeleton for shielding the magnetic field coil. The inner ends of the sealing cylinder and the stainless steel skeleton for shielding the magnetic field coil are sealed by the skeleton end cap. The skeleton end cap extends toward the main magnetic field stainless steel skeleton and is fixedly connected to the main magnetic field stainless steel skeleton. A sealing end plate is provided between the main magnetic field stainless steel skeleton and the outer end of the sealing cylinder.

[0009] In this technical solution, a sealing structure is provided between the outer cylinder of the container and the stainless steel skeleton of the main magnetic field. This sealing structure includes a shielded stainless steel skeleton for the magnetic field coil, a sealing cylinder, and end caps on the skeleton. The shielded stainless steel skeleton, sealing cylinder, and end caps create an annular groove structure between the outer cylinder of the container and the stainless steel skeleton of the main magnetic field, thus reducing the volume of the internal sealed space and consequently reducing the volume of liquid helium to be filled, thereby lowering operating costs. In summary, this technical solution, while ensuring the strength of the skeleton structure, minimizes the effective volume of the liquid helium container, reducing the volume of liquid helium to be filled, thereby reducing the amount of liquid helium used and saving operating costs.

[0010] Furthermore, in order to simplify the assembly design of the component structure, the outer cylinder of the container, the stainless steel frame of the shielded magnetic field coil, the sealed cylinder and the stainless steel frame of the main magnetic field are all coaxially arranged.

[0011] Furthermore, in order to reduce the volume of liquid helium filling and lower the cost of use while ensuring the effectiveness of use, two sealing structures are symmetrically arranged between the outer cylinder of the container and the stainless steel frame of the main magnetic field. A shielding frame is provided between the two sealing structures to effectively support the two sealing structures and ensure the strength of the internal structure. At the same time, open annular grooves are formed on both sides of the stainless steel frame, which further reduces the volume of the sealed space inside the stainless steel frame, thereby reducing the volume of liquid helium filling and lowering the cost of use.

[0012] Furthermore, to facilitate the setting of the shielding skeleton support, a shielding skeleton support is provided between the two sealed skeleton end caps.

[0013] Furthermore, in order to improve the structural strength of the annular groove, an annular groove is formed between the stainless steel skeleton of the shielded magnetic field coil, the sealing cylinder and the skeleton end cap, and a support structure is provided in the annular groove.

[0014] Furthermore, to simplify the structural design, the support structure includes multiple support plates arranged at equal intervals in the annular groove.

[0015] Furthermore, to enhance the support effect, the support plate is positioned near the outer side of the annular groove.

[0016] Furthermore, the diameter D1 of the annular space formed by the stainless steel skeleton of the main magnetic field is greater than 1000mm, the outer diameter D2 of the outer cylinder of the container is 1850mm, and the length L of both the stainless steel skeleton of the main magnetic field and the outer cylinder of the container is less than 1150mm.

[0017] Currently, mainstream low-temperature superconducting magnets on the market, such as 1.0T, 1.5T, and 3.0T, typically suffer from limitations in structural size. After installing gradient coils, body coils, and the patient bed, the usable aperture for human body scanning is relatively narrow, the channel is relatively long, airflow is poor, and the patient experiences strong feelings of oppression. Therefore, developing large-aperture and short magnet technologies is crucial for improving the openness and comfort of the magnet and enhancing the human experience. This design increases the inner diameter of the skeleton structure and decreases its length. Through structural optimization, the openness and comfort of the magnet are improved, thus enhancing the human experience.

[0018] Furthermore, existing magnets are large in size and require precision assembly of large workpieces, which places high demands on the processing and assembly of parts. They are made of non-magnetic stainless steel, resulting in a large weight and high cost of the entire component, as well as requiring complex tooling equipment. This design improves the dimensions, reduces the higher requirements for the processing and assembly of parts, reduces the weight of the entire component, effectively reduces the cost, and also reduces the complexity of tooling equipment.

[0019] Furthermore, to further enhance the comfort of the magnet, the diameter D1 of the annular space formed by the stainless steel frame of the main magnetic field is 1070 mm.

[0020] Furthermore, to better improve the comfort of the magnet, the length L of both the main magnetic field stainless steel frame and the outer cylinder of the container is 1136mm.

[0021] The beneficial effects of this invention are as follows: In this technical solution, a sealing structure is provided between the outer cylinder of the container and the stainless steel frame of the main magnetic field. This sealing structure includes a stainless steel frame shielding the magnetic field coil, a sealing cylinder, and frame end caps. By setting up the stainless steel frame shielding the magnetic field coil, the sealing cylinder, and the frame end caps, an annular groove structure is formed between the outer cylinder of the container and the stainless steel frame of the main magnetic field. This reduces the volume of the internal sealed space, thereby reducing the volume of liquid helium added and lowering usage costs. In summary, this technical solution, while ensuring the strength of the frame structure, minimizes the effective volume of the liquid helium container, reducing the volume of liquid helium added, thereby reducing the amount of liquid helium used and saving usage costs. Attached Figure Description

[0022] Figure 1This is a structural diagram of the existing design;

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0025] In the figure: 1. Outer cylinder of container; 2. Stainless steel frame of main magnetic field; 3. Stainless steel frame of shielded magnetic field coil; 4. Sealed cylinder; 5. Frame end cap; 6. Sealed end cap; 7. Sealed end plate; 8. Shielded frame support; 9. Annular groove; 10. Support plate. Detailed Implementation

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0027] Example 1:

[0028] like Figures 2-3 As shown, this embodiment provides a stainless steel skeleton structure with low liquid helium content, including an outer cylinder 1 of the container and a stainless steel skeleton 2 for the main magnetic field, with a sealing structure between the outer cylinder 1 of the container and the stainless steel skeleton 2 for the main magnetic field.

[0029] The sealing structure includes a stainless steel skeleton 3 for shielding magnetic field coils, a sealing cylinder 4, and a skeleton end cap 5. The stainless steel skeleton 3 for shielding magnetic field coils is located inside the outer cylinder 1 of the container. A sealing end cap 6 is provided between the stainless steel skeleton 3 for shielding magnetic field coils and the outer end of the outer cylinder 1 of the container. The sealing cylinder 4 is located inside the stainless steel skeleton 3 for shielding magnetic field coils. The inner ends of the sealing cylinder 4 and the stainless steel skeleton 3 for shielding magnetic field coils are sealed by the skeleton end cap 5. The skeleton end cap 5 extends toward the main magnetic field stainless steel skeleton 2 and is fixedly connected to the main magnetic field stainless steel skeleton 2. A sealing end plate 7 is provided between the main magnetic field stainless steel skeleton 2 and the outer end of the sealing cylinder 4.

[0030] In this technical solution, a sealing structure is provided between the outer cylinder 1 of the container and the stainless steel frame 2 of the main magnetic field. This sealing structure includes a stainless steel frame 3 for shielding the magnetic field coil, a sealing cylinder 4, and frame end caps 5. The arrangement of these components creates an annular groove between the outer cylinder 1 and the stainless steel frame 2, reducing the volume of the internal sealed space and thus decreasing the volume of liquid helium added, thereby lowering operating costs. In summary, this technical solution minimizes the effective volume of the liquid helium container and reduces the liquid helium filling volume while ensuring the structural strength of the frame, thereby reducing the amount of liquid helium used and saving on operating costs.

[0031] Example 2:

[0032] This embodiment is an optimization based on the above embodiment 1.

[0033] To simplify the assembly design of the components, the outer cylinder 1, the stainless steel frame 3 of the shielded magnetic field coil, the sealed cylinder 4, and the stainless steel frame 2 of the main magnetic field are all coaxially arranged.

[0034] Example 3:

[0035] This embodiment is an optimization based on the above embodiment 1.

[0036] To further reduce the volume of liquid helium filling and lower operating costs while ensuring performance, two symmetrical sealing structures are installed between the outer cylinder 1 of the container and the stainless steel frame 2 of the main magnetic field. A shielding frame support 8 connects these two sealing structures, effectively supporting them and ensuring internal structural strength. Furthermore, open annular grooves 9 are formed on both sides of the stainless steel frame, further reducing the volume of the sealed space within the frame, thus decreasing the liquid helium filling volume and lowering operating costs. Specifically, the total volume of the two open annular grooves is approximately 670L. When the magnet container is 100% filled with liquid helium, this saves over 670L of liquid helium volume, significantly reducing costs at current market prices.

[0037] Example 4:

[0038] This embodiment is an optimization based on the above embodiment 3.

[0039] To facilitate the setting of the shielding frame support 8, a shielding frame support 8 is provided between the two sealed frame end caps 5.

[0040] Example 5:

[0041] This embodiment is an optimization based on the above embodiment 1.

[0042] To enhance the structural strength of the annular groove 9, an annular groove 9 is formed between the stainless steel frame 3 of the shielded magnetic field coil, the sealing cylinder 4, and the frame end cap 5, and a support structure is provided inside the annular groove 9.

[0043] Example 6:

[0044] This embodiment is an optimization based on the above embodiment 5.

[0045] To simplify the structural design, the support structure includes multiple support plates 10 arranged at equal intervals around the annular groove 9.

[0046] Example 7:

[0047] This embodiment is an optimization based on the above embodiment 6.

[0048] To improve the support effect, the support plate 10 is positioned near the outer side of the annular groove 9.

[0049] Example 8:

[0050] This embodiment is an optimization based on the above embodiment 1.

[0051] The diameter D1 of the annular space formed by the stainless steel frame 2 of the main magnetic field is greater than 1000 mm, the outer diameter D2 of the outer cylinder 1 of the container is 1850 mm, and the length L of both the stainless steel frame 2 of the main magnetic field and the outer cylinder 1 of the container is less than 1150 mm.

[0052] Currently, mainstream low-temperature superconducting magnets on the market, such as 1.0T, 1.5T, and 3.0T, typically suffer from limitations in structural size. After installing gradient coils, body coils, and the patient bed, the usable aperture for human body scanning is relatively narrow, the channel is relatively long, airflow is poor, and the patient experiences strong feelings of oppression. Therefore, developing large-aperture and short magnet technologies is crucial for improving the openness and comfort of the magnet and enhancing the human experience. This design increases the inner diameter of the skeleton structure and decreases its length. Through structural optimization, the openness and comfort of the magnet are improved, thus enhancing the human experience.

[0053] Furthermore, existing magnets are large in size and require precision assembly of large workpieces, which places high demands on the processing and assembly of parts. They are made of non-magnetic stainless steel, resulting in a large weight and high cost of the entire component, as well as requiring complex tooling equipment. This design improves the dimensions, reduces the higher requirements for the processing and assembly of parts, reduces the weight of the entire component, effectively reduces the cost, and also reduces the complexity of tooling equipment.

[0054] Example 9:

[0055] This embodiment is an optimization based on the above embodiment 8.

[0056] To improve the comfort of the magnet, the diameter D1 of the annular space formed by the stainless steel main magnetic field frame 2 is 1070mm, which is larger than the inner diameter of most existing mainstream magnet frames.

[0057] Example 10:

[0058] This embodiment is an optimization based on the above embodiment 8.

[0059] To improve the comfort of the magnet, the length L of both the main magnetic field stainless steel frame 2 and the outer cylinder 1 of the container is 1136mm. This makes the total length of the magnet shorter and facilitates the scanning operation.

[0060] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A stainless steel framework structure with low liquid helium content, characterized in that: It includes an outer cylinder of the container and a stainless steel frame for the main magnetic field, with a sealing structure between the outer cylinder of the container and the stainless steel frame for the main magnetic field; The sealing structure includes a stainless steel skeleton for shielding the magnetic field coil, a sealing cylinder, and a skeleton end cap. The stainless steel skeleton for shielding the magnetic field coil is disposed inside the outer cylinder of the container. A sealing end cap is provided between the stainless steel skeleton for shielding the magnetic field coil and the outer end of the outer cylinder of the container. The sealing cylinder is located inside the stainless steel skeleton for shielding the magnetic field coil. The inner ends of the sealing cylinder and the stainless steel skeleton for shielding the magnetic field coil are sealed by the skeleton end cap. The skeleton end cap extends toward the main magnetic field stainless steel skeleton and is fixedly connected to the main magnetic field stainless steel skeleton. A sealing end plate is provided between the main magnetic field stainless steel skeleton and the outer end of the sealing cylinder. An annular groove is formed between the stainless steel frame of the shielded magnetic field coil, the sealed cylinder and the frame end cap, and a support structure is provided in the annular groove; The support structure includes multiple support plates that are circumferentially spaced within an annular groove; The support plate is positioned near the outer side of the annular groove.

2. The stainless steel skeleton structure with low liquid helium content according to claim 1, characterized in that: The outer cylinder of the container, the stainless steel frame of the shielded magnetic field coil, the sealed cylinder, and the stainless steel frame of the main magnetic field are all coaxially arranged.

3. The stainless steel framework structure with low liquid helium content according to claim 1, characterized in that: Two sealing structures are symmetrically arranged between the outer cylinder of the container and the stainless steel frame of the main magnetic field, and a shielding frame is provided between the two sealing structures.

4. The stainless steel skeleton structure with low liquid helium content according to claim 3, characterized in that: A shielding frame is provided between the two sealed frame end caps.

5. The stainless steel framework structure with low liquid helium content according to claim 1, characterized in that: The diameter D1 of the annular space formed by the stainless steel skeleton of the main magnetic field is greater than 1000 mm, the outer diameter D2 of the outer cylinder of the container is 1850 mm, and the length L of both the stainless steel skeleton of the main magnetic field and the outer cylinder of the container is less than 1150 mm.

6. The stainless steel framework structure with low liquid helium content according to claim 5, characterized in that: The diameter D1 of the annular space formed by the stainless steel skeleton of the main magnetic field is 1070 mm.

7. The stainless steel framework structure with low liquid helium content according to claim 5, characterized in that: The length L of both the stainless steel frame of the main magnetic field and the outer cylinder of the container is 1136 mm.

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