CN212542069U - Superconducting magnet liquid helium container device - Google Patents
Superconducting magnet liquid helium container device Download PDFInfo
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- CN212542069U CN212542069U CN202021246940.6U CN202021246940U CN212542069U CN 212542069 U CN212542069 U CN 212542069U CN 202021246940 U CN202021246940 U CN 202021246940U CN 212542069 U CN212542069 U CN 212542069U
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- liquid helium
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- superconducting magnet
- filling ring
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Abstract
The utility model provides a superconducting magnet liquid helium container device, locate including inner tube, cover the outside urceolus of inner tube, lid in the inner tube with the end cover at urceolus top, the urceolus the inner tube reaches the end cover constitutes the inclosed chamber that holds that is used for holding the liquid helium container, the cold head is installed to the outer wall of urceolus the inside at least one that is equipped with the hoop and distributes of liquid helium container is used for the cladding in fill the ring and with the heat conduction screen that the cold head contacted, it has low temperature resistant material to fill the inside packing of ring. According to the superconducting magnet liquid helium container device, the filling ring filled with the low-temperature-resistant material is arranged in the liquid helium container, the heat conduction screen is arranged outside the filling ring and is in contact with the cold head on the outer wall of the outer barrel, so that the internal volume of the liquid helium container can be reduced, the usage amount of liquid helium is reduced, meanwhile, the volatilization of liquid helium can be effectively prevented, and the use cost is saved.
Description
Technical Field
The utility model relates to a medical magnetic resonance superconducting magnet technical field, more specifically say, relate to a superconducting magnet liquid helium container device.
Background
As is known, the principle of magnetic resonance imaging examination is that a magnetic core of an object to be imaged in a main magnetic field resonates by using a specific radio frequency pulse, signals are spatially encoded by an external gradient magnetic field, and the acquired resonance signals are processed and reconstructed by a computer to obtain an image.
The stable magnetic field is a key factor influencing high-quality images in the nuclear magnetic resonance imaging technology, the magnetic field is generated by a superconducting coil, the superconducting coil mainly comprises a main coil and a shielding coil, at present, most of the main coil and the shielding coil in the superconducting coil on the market are fixedly arranged in a liquid helium container through a main coil framework and a shielding coil framework and are soaked in the liquid helium, and the main coil framework and the shielding coil framework are directly fixed in the liquid helium container in a physical welding mode.
In recent years, as the resource of liquid helium decreases, the price of liquid helium increases, so that the cost for producing magnets increases. The conventional liquid helium container has a large internal volume and a large amount of liquid helium, so that once a superconducting magnet is quenched, a large amount of liquid helium is wasted, and the use cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a superconducting magnet liquid helium container device has solved too big and volatile technical problem of liquid helium use effectively.
The utility model provides a superconducting magnet liquid helium container device, locate including inner tube, cover the outside urceolus of inner tube, lid in the inner tube with the end cover at urceolus top, the urceolus the inner tube reaches the end cover constitutes the inclosed chamber that holds that is used for holding the liquid helium container, the cold head is installed to the outer wall of urceolus the inside at least one that is equipped with the hoop and distributes of liquid helium container is used for the cladding in fill the ring and with the heat conduction screen that the cold head contacted, it has low temperature resistant material to fill the inside packing of ring.
Preferably, the filling ring comprises an upper filling ring body and a lower filling ring body, the upper filling ring body comprises first upper filling rings which are circumferentially distributed at intervals along the inside of the liquid helium container, second upper filling rings which have arc lengths larger than those of the first upper filling rings, and first lower filling rings and second lower filling rings which are arranged below the first upper filling rings and the second upper filling rings and are sleeved on the main coil framework; the heat conduction screen is coated on the first upper filling ring and the second upper filling ring.
Preferably, the first upper filling ring, the second upper filling ring, the first lower filling ring and the second lower filling ring are all made of ultra-high molecular weight polyethylene plate and low temperature resistant filling foam.
Preferably, the heat conduction screen includes and is used for including two fan-shaped cladding portions and two connecting portion respectively, two fan-shaped cladding portion is used for in circumference parcel first go up the packing ring with the packing ring on the second, two connecting portion are used for connecting two fan-shaped cladding portion.
Preferably, the heat conduction screen is a copper thermal connection screen.
Preferably, opposite sides of the top of the fan-shaped cladding part are connected through a connecting piece.
Preferably, the fan-shaped coating part and the connecting part are welded into a whole.
Compared with the prior art, the utility model provides a superconducting magnet liquid helium container device, under the prerequisite of guaranteeing the stable installation of magnet, through install the cold head on the outside barrel wall of urceolus, set up at least one packing ring and cladding in the heat conduction screen that the packing ring set up inside the liquid helium container, on the one hand, utilize the packing ring can fill the internal volume of liquid helium container to reduce the use amount of liquid helium, on the other hand, fill the ring inside and fill resistant low temperature material, reduce cold volume and run off, play the heat preservation effect; in addition, the heat conduction screen is arranged outside the filling ring, so that the control on the internal temperature and pressure of the liquid helium container is increased, the volatilization of the liquid helium is prevented, and the use cost is remarkably saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a top view of a superconducting magnet liquid helium container apparatus provided in the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an internal schematic view of the heat shield of FIG. 1;
FIG. 4 is a partial cross-sectional view of FIG. 3;
FIG. 5 is a schematic view of the installation of the first lower packing ring and the second lower packing ring of FIG. 1;
fig. 6 is a sectional view of B-B in fig. 5.
Wherein, 1-outer cylinder, 2-inner cylinder, 3-cold head, 4-liquid helium container, 5-heat conduction screen, 6-first upper filling ring, 7-second upper filling ring, 8-cold head connecting piece, 9-main coil, 10-main coil skeleton, 11-shielding coil, 12-shielding coil skeleton, 13-connecting piece, 14-cold screen, 15-first lower filling ring, 16-second lower filling ring;
51-fan-shaped coating part, 52-connecting part.
Detailed Description
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 6, fig. 1 is a top view of a superconducting magnet liquid helium container apparatus provided in the present invention; FIG. 2 is a cross-sectional view A-A of FIG. 1; FIG. 3 is an internal schematic view of the heat shield of FIG. 1; FIG. 4 is a partial cross-sectional view of FIG. 3; FIG. 5 is a schematic view of the installation of the first lower packing ring and the second lower packing ring of FIG. 1; fig. 6 is a sectional view of B-B in fig. 5.
The utility model provides a superconducting magnet liquid helium container device, including urceolus 1, inner tube 2, cold screen 14, end cover and cold head 3, urceolus 1, inner tube 2 and cold screen 14 three are tubular structure, the internal diameter size of urceolus 1 is greater than inner tube 2 size, locate outside inner tube 2 and guarantee both concentric settings with the realization cover, it is preferred, urceolus 1 and inner tube 2 are made by stainless steel material, cold screen 14 installs the inside at urceolus 1, and liquid helium container 4 installs the inside at cold screen 14, the end cover lid is adorned in the top of inner tube 2 and urceolus 1, urceolus 1 from this, inner tube 2 and end cover cooperation constitute inclosed chamber that holds, liquid helium container 4 installs within holding, cold head 3 passes through 8 horizontal installations of cold head connecting piece at the outer wall of urceolus 1, as shown in figure 1.
A main coil framework 10 and a shielding coil framework 12 are arranged in the liquid helium container 4 of the filling ring, and a main coil 9 and a shielding coil 11 are stably and fixedly arranged on the main coil framework 10 and the shielding coil framework 12. The liquid helium container 4 is also internally provided with at least one filling ring and a heat conduction screen 5, the filling ring is of an annular structure and is distributed along the inner wall of the liquid helium container 4, the filling ring is a solid filling ring, low-temperature resistant materials are filled in the solid filling ring, the heat conduction screen 5 made of heat conduction materials is coated outside the filling ring, one end of the heat conduction screen 5 is contacted with the cold head 3, the heat conduction screen 5 can enable the cold energy of the cold head 3 to be rapidly and uniformly transmitted to the surface of the whole main coil 9, the traditional cold head 3 adopts a mode of slowly diffusing the cold energy through helium gas to cause low utilization rate of the cold energy and poor control effect of a magnet, the heat conduction screen 5 is additionally arranged in the liquid helium container to increase heat conduction rate and reaction speed, rapidly and effectively adjust the temperature and pressure of the magnet, the cold head 3 timely and uniformly transmits the cold energy to the heat conduction screen 5 and transmits the cold energy to various positions of the liquid helium container 4, and avoids abnormal pressure caused, a constant temperature of the liquid helium vessel 4 is achieved.
In a specific embodiment, the filling ring includes an upper filling ring body and a lower filling ring body, wherein the upper filling ring body includes a first upper filling ring 6 and a second upper filling ring 7, both the first upper filling ring 6 and the second upper filling ring 7 are of a fan-shaped structure, the heat conducting screen 5 is wrapped around the first upper filling ring 6 and the second upper filling ring 7, and a gap is reserved between the first upper filling ring 6 and the second upper filling ring 7 in the circumferential direction and between the first upper filling ring 6 and the inner cylinder 2 and between the second upper filling ring 7 and the first upper filling ring 6 in the radial direction, as shown in fig. 4, the first upper filling ring 6 and the second upper filling ring 7 can both fill the internal volume of the liquid helium container 4, thereby reducing the usage amount of the liquid helium and achieving the technical effect of reducing the loss of cold energy and preserving heat. According to a similar principle, a first lower filling ring 15 and a second lower filling ring 16 are sleeved on the main coil framework 10, the first lower filling ring 15 and the second lower filling ring 16 are arranged below the first upper filling ring 6 and the second upper filling ring 7, the first lower filling ring 15 and the second lower filling ring 16 are both of circular ring structures, and are axially distributed and provided with gaps, so that the main coil framework 10 can be filled in an external space of the main coil framework, the use amount of liquid helium is reduced, and the loss of cold energy is reduced.
Preferably, the first upper filling ring 6, the second upper filling ring 7, the first lower filling ring 15 and the second lower filling ring 16 are all wrapped with ultra-high molecular weight polyethylene plates and filled with low temperature resistant filling foam, and the low temperature resistant filling foam is filled in the ultra-high molecular weight polyethylene plates.
In a preferred embodiment, the heat conducting screen 5 includes two fan-shaped coating portions 51 and a connecting portion 52, the two fan-shaped coating portions 51 have the same structure as the first upper filling ring 6 and the second upper filling ring 7, and have a size slightly larger than that of the two filling rings, and both adopt a side enclosure structure, which forms an enclosure space with the bottom surface of the liquid helium container 4, so that the two fan-shaped coating portions 51 circumferentially surround the first upper filling ring 6 and the second upper filling ring 7; the two fan-shaped coating parts 51 are connected by a connecting part 52 to ensure all parts of the liquid helium vessel 4.
The heat conduction screen 5 is specifically a copper heat connection screen.
In order to improve the installation strength, the connecting pieces 13 can be installed on the top of the fan-shaped cladding 51, and the connecting pieces 13 can be detachably installed on the two opposite arc-shaped surfaces of the fan-shaped cladding 51 through bolts or can be detachably connected through bolts.
The fan-shaped coating part 51 and the connecting part 52 are respectively provided with a plurality of circulating parts communicated with the liquid helium container 4, so that the liquid helium can uniformly flow to all parts of the liquid helium container 4 through the circulating parts. In this embodiment, the circulating part is a through hole such as a circular hole or a square hole, and in other embodiments, the circulating part may be a cylindrical or conical passage communicating with the liquid helium container 4, and the specific structure of the circulating part is not limited herein.
The heat conduction screen 5 is of an integrated structure, and the fan-shaped coating part 51 and the connecting part 52 are welded integrally, so that the overall strength of the heat conduction screen 5 is improved, and the service life of the heat conduction screen 5 is prolonged.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The superconducting magnet liquid helium container device provided by the invention is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (7)
1. The superconducting magnet liquid helium container device is characterized by comprising an inner cylinder (2), an outer cylinder (1) sleeved outside the inner cylinder (2) and an end cover covering the top of the inner cylinder (2) and the top of the outer cylinder (1), wherein a cold head (3) is installed on the outer wall of the outer cylinder (1), at least one filling ring distributed annularly and a heat conduction screen (5) used for covering the filling ring and contacting with the cold head (3) are arranged inside the liquid helium container (4), and low-temperature resistant materials are filled inside the filling ring.
2. The superconducting magnet liquid helium vessel arrangement of claim 1, wherein the packing rings comprise an upper packing ring body and a lower packing ring body, the upper packing ring body comprises a first upper packing ring (6) circumferentially spaced along the interior of the liquid helium vessel (4), a second upper packing ring (7) having an arc length greater than the first upper packing ring (6), a first lower packing ring (15) and a second lower packing ring (16) disposed below the first upper packing ring (6) and the second upper packing ring (7) and nested on a main coil former (10); the heat conduction screen (5) is wrapped on the first upper filling ring (6) and the second upper filling ring (7).
3. Superconducting magnet liquid helium vessel arrangement according to claim 2, wherein the first upper filling ring (6), the second upper filling ring (7), the first lower filling ring (15) and the second lower filling ring (16) are made of ultra high molecular weight polyethylene sheet material and low temperature resistant filling foam.
4. A superconducting magnet liquid helium vessel arrangement according to claim 3, wherein the heat conducting shield (5) comprises two fan-shaped cladding portions (51) and connecting portions (52), the two fan-shaped cladding portions (51) are structures for circumferentially wrapping the first upper filling ring (6) and the second upper filling ring (7) and are provided with openings on one side, and the two connecting portions (52) are used for connecting the two fan-shaped cladding portions (51).
5. Superconducting magnet liquid helium vessel arrangement according to claim 4, wherein the heat conducting shield (5) is in particular a copper thermal connection shield.
6. Superconducting magnet liquid helium vessel arrangement according to claim 5, wherein the top opposite sides of the fan-shaped cladding (51) are connected by a connection (13).
7. A superconducting magnet liquid helium vessel arrangement according to any of claims 4 to 6, wherein the fan-shaped cladding (51) and the connecting portion (52) are welded together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021246940.6U CN212542069U (en) | 2020-06-30 | 2020-06-30 | Superconducting magnet liquid helium container device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021246940.6U CN212542069U (en) | 2020-06-30 | 2020-06-30 | Superconducting magnet liquid helium container device |
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| CN212542069U true CN212542069U (en) | 2021-02-12 |
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| CN202021246940.6U Active CN212542069U (en) | 2020-06-30 | 2020-06-30 | Superconducting magnet liquid helium container device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075597A (en) * | 2021-03-23 | 2021-07-06 | 东北大学 | Magnet magnetic field measuring method and measuring system |
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2020
- 2020-06-30 CN CN202021246940.6U patent/CN212542069U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075597A (en) * | 2021-03-23 | 2021-07-06 | 东北大学 | Magnet magnetic field measuring method and measuring system |
| CN113075597B (en) * | 2021-03-23 | 2022-05-06 | 东北大学 | Magnet magnetic field measuring method and measuring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A liquid helium container for superconducting magnet Effective date of registration: 20210615 Granted publication date: 20210212 Pledgee: Weifang rural commercial bank Limited by Share Ltd. hi tech sub branch Pledgor: WEIFANG XINLI SUPERCONDUCTING MAGNET TECHNOLOGY Co.,Ltd. Registration number: Y2021980004794 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220628 Granted publication date: 20210212 Pledgee: Weifang rural commercial bank Limited by Share Ltd. hi tech sub branch Pledgor: WEIFANG XINLI SUPERCONDUCTING MAGNET TECHNOLOGY Co.,Ltd. Registration number: Y2021980004794 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |