CN214043272U - Low-temperature precooling device - Google Patents
Low-temperature precooling device Download PDFInfo
- Publication number
- CN214043272U CN214043272U CN202023044085.3U CN202023044085U CN214043272U CN 214043272 U CN214043272 U CN 214043272U CN 202023044085 U CN202023044085 U CN 202023044085U CN 214043272 U CN214043272 U CN 214043272U
- Authority
- CN
- China
- Prior art keywords
- cold
- sealed container
- guide member
- refrigerator
- piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a low temperature precooling apparatus, including inside being used for placing by the sealed container of cooling piece, sealed container is equipped with the installing port that is used for the seal installation refrigerator and is used for filling the air supplement unit into the helium to sealed container, and in the cold head of refrigerator inserted sealed container along the installing port, be connected with first cold spare of leading on the cold head, still include one end and be used for connecting and lead cold spare at the first second of leading cold spare by cooling piece, other end connection. When in use, the container is pre-cooled to about 77K by liquid nitrogen, the sealed container is vacuumized, and helium is filled in the container. The refrigerator is led cold spare through first leading, second and is cooled off by the cooling piece to the secret, and refrigerated in-process, air supplement unit constantly mends the helium to sealed container to guarantee pressure and external pressure balance among the sealed container, prevent that the air from getting into the low temperature container and freezing, thereby under the condition that does not use liquid helium, can be quick with the superconducting magnet from 77K cooling to 4K, reduce the cost of magnet cooling.
Description
Technical Field
The utility model relates to a superconducting magnet technical field, more specifically say, relate to a low temperature precooling apparatus.
Background
At present, a superconducting magnet generally works in a 4K temperature region, and the common way for cooling the magnet from the normal temperature to the 4K temperature region is to cool the magnet to about 77K by using liquid nitrogen and then cool the magnet to about 4K by using liquid helium. However, such direct use of liquid helium to cool the magnet from about 77K to about 4K results in a large amount of waste of liquid helium, which is a scarce resource and therefore expensive magnet cooling cost.
Therefore, how to solve the problem of the cost of magnet cooling is an issue that is currently being used for by the skilled person.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a low-temperature precooling apparatus, which can quickly cool down a superconducting magnet from 77K to 4K without using liquid helium, thereby reducing the cost of cooling the magnet.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a low temperature precooling apparatus, is used for placing the sealed container by the cooling piece including inside, sealed container be equipped with be used for the sealed mounting refrigerator the installing port and be used for to fill into the air supplement unit of helium in the sealed container, the cold head of refrigerator is followed the installing port inserts in the sealed container, be connected with first cold piece of leading on the cold head, still include one end and be used for connecting be connected by cooling piece, other end connection first cold piece of leading second leads cold piece.
Preferably, the installation opening is provided with a connecting sleeve, the connecting sleeve comprises a first sleeving opening used for being sleeved on the outer wall of the refrigerator in a sealing manner, and the body of the connecting sleeve is provided with a folding part with adjustable length.
Preferably, the connecting sleeve further comprises a second sleeve opening which is sleeved on the outer wall of the second cold guide piece in a sealing manner, and the air supplementing device is arranged on the connecting sleeve.
Preferably, the first cold guide part comprises a flange part connected to the cold head of the refrigerator, a sphere part detachably connected to the flange part, a rotating part provided with a hemispherical groove for mounting the sphere part, and a limiting part connected to the rotating part for clamping the sphere part in the hemispherical groove, and the sphere part can rotate along the spherical groove relative to the rotating part.
Preferably, one of the first cold guide part and the second cold guide part is provided with a conical boss, and the other one of the first cold guide part and the second cold guide part is provided with a conical groove which is inserted in a matching way with the conical boss.
Preferably, the first cold guiding part is provided with a conical groove with a downward opening, and the second cold guiding part comprises a strip cold guiding part and a conical cold guiding part which is fixed on the strip cold guiding part and is provided with a conical boss.
The utility model provides a low temperature precooling apparatus, during the use, will be installed in sealed container by the cooling piece earlier to lead the cold piece with the second and connect in taking the cooling room, through the liquid nitrogen precooling to 77K left and right back, with sealed container evacuation, and fill into the lower gaseous state conducting medium of boiling point, for example helium etc.. Then assemble the refrigerator on the installing port of the sealed container, and make the first lead the cold piece connect to the second lead the cold piece, the refrigerator leads cold through first lead the cold piece, the second leads the cold piece, in order to the cooled piece in the sealed container, in the course of cooling, the air supplement unit is constantly mended helium to the sealed container, in order to guarantee the pressure in the sealed container and external pressure balance, prevent the air from entering the cryocontainer and icing, thus under the situation without using liquid helium, can be fast from 77K to 4K cooling superconducting magnet, reduce the cost that the magnet cools.
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 schematic view of a low-temperature precooling apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic view of a low-temperature precooling apparatus according to a second embodiment of the present invention;
fig. 3 is an enlarged schematic view of the first and second cooling conductive members.
The device comprises a sealed container, a mounting port 11, a cooled part 2, a refrigerator 3, a first cold guide 4, a flange 41, a spherical part 42, a limiting part 43, a rotating part 44, a conical groove 441, a second cold guide 5, a conical cold guide 51, a long-strip cold guide 52, a conical boss 521, a connecting sleeve 6, a first sleeving port 61, a folding part 62, a second sleeving port 63, a gas supplementing device 7 and a sealed container 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a low temperature precooling apparatus, under the condition that does not use liquid helium, can be quick with the superconducting magnet from 77K cooling to 4K, reduce the refrigerated cost of magnet.
Referring to fig. 1 to 3, fig. 1 is a schematic view illustrating a low-temperature precooling apparatus according to a first embodiment of the present invention; fig. 2 is a schematic view of a low-temperature precooling apparatus according to a second embodiment of the present invention;
fig. 3 is an enlarged schematic view of the first and second cooling conductive members.
The utility model provides a low temperature precooling apparatus, be used for placing sealed container 1 by cooling piece 2 including inside, sealed container 1 is equipped with the installing port 11 that is used for the seal installation refrigerator 3 and is used for to filling into the air supplement unit 7 of helium in sealed container 1, and the cold head of refrigerator 3 is connected with first cold spare 4 of leading on the cold head in inserting sealed container 1 along installing port 11, still includes that one end is used for connecting and is led cold spare 5 at the first second of leading cold spare 4 by cooling piece 2, the other end connection.
Wherein, the cooled piece 2 is arranged in a sealed container 1, the sealed container 1 is a 4K low-temperature container, and the cooled piece 2 comprises a superconducting coil or a magnet framework and the like. The cooled member 2 and the first cooling conductive member 4 are connected together and fixed in the sealed container 1 by a conventional manner. In use, the sealed container 1 needs to be enclosed in an evacuated external vacuum vessel, which also contains a thermal radiation shield surrounding the cryogenic container.
The refrigerator 3 and the second cold-conducting piece 5 are connected together, and then the refrigeration is installed in the sealed container 1, namely the refrigerator 3 and the first cold-conducting piece 4 are inserted into the sealed container 1 along the installation hole on the sealed container 1, so that the first cold-conducting piece 4 is in fit contact with the second cold-conducting piece, and the cold energy generated by the refrigerator 3 is transmitted to the second cold-conducting piece 5 through the first cold-conducting piece 4 and then transmitted to the cooled piece 2 through the second cold-conducting piece 5, so as to realize the refrigeration to the cooled piece.
Still be equipped with air supplement unit 7 on sealed container 1, being cooled down by cooling piece 2 in-process, air supplement unit 7 is used for mending the lower gas of boiling point such as helium to the low temperature vessel, and its effect is: the method comprises the following steps of firstly, ensuring the balance between the pressure in the sealed container 1 and the external pressure, and preventing the pressure in the sealed container 1 from being reduced due to the fact that the density is reduced after the helium is cooled, so that air enters the sealed container to be frozen; secondly, the helium gas can strengthen the heat exchange between the refrigerator 3 and the cooled piece 2 in a convection heat exchange mode; and thirdly, after precooling is finished, the refrigerating machine 3 and the first cold guide piece 4 are required to be taken out of the sealed container 1, so that the balance between the pressure in the sealed container 1 and the external pressure is ensured, and air is prevented from entering the low-temperature container to freeze.
The utility model provides a low temperature precooling apparatus, during the use, will be installed in sealed container 1 by cooling part 2 earlier to lead cold member 5 with the second and connect in taking the cooling room, through the liquid nitrogen precooling to 77K left and right back, with sealed container 1 evacuation, and fill into the lower gaseous state conduction medium of boiling point, for example helium etc.. Then the refrigerator 3 is assembled on the mounting port 11 of the sealed container 1, the first cold guide part 4 is connected to the second cold guide part 5, the refrigerator 3 conducts cold through the first cold guide part 4 and the second cold guide part 5 so as to conduct cold to the cooled part 2 in the sealed container 1, in the cooling process, the gas supplementing device 7 continuously supplements helium gas into the sealed container 1 so as to ensure that the pressure in the sealed container 1 is balanced with the external pressure, prevent air from entering the low-temperature container to freeze, and therefore, under the condition that liquid helium is not used, the superconducting magnet can be rapidly cooled from 77K to 4K, and the magnet cooling cost is reduced.
On the basis of the above embodiment, in consideration of the specific connection manner of the refrigerator 3 and the hermetic container 1, it is preferable that the mounting opening 11 is provided with a connection sleeve 6, the connection sleeve 6 includes a first sleeve opening 61 for being hermetically sleeved on the outer wall of the refrigerator 3, and the body of the connection sleeve 6 has a folding portion 62 with adjustable length.
As shown in fig. 1, in this embodiment, the refrigerator 3 is hermetically connected to the mounting opening 11 through the connection sleeve 6, the connection sleeve 6 is provided with a first fitting opening 61 that is fitted on the outer wall of the refrigerator 3, and a body of the connection sleeve 6 has a folding portion 62 with adjustable length, so that the height of the refrigerator 3 can be adjusted through the connection sleeve 6, and good contact between the first cold guiding member 4 and the second cold guiding member 5 is ensured.
On the basis of the above embodiment, as a preferable option, the connection sleeve 6 further includes a second sleeve opening 63 hermetically sleeved on the outer wall of the second cooling guide 5, and the air supplement device 7 is disposed on the connection sleeve 6.
As shown in fig. 2, in this embodiment, the connection sleeve 6 further includes a second sleeving opening 63, and the second sleeving opening 63 is hermetically sleeved on the outer wall of the second cooling conducting member 5, so as to separate the refrigerator 3 from the cooled member 2, and an individual sealed container 8 is formed between the second cooling conducting member 5 and the connection sleeve 6, so that, in the process of refrigerating the cooled member, the sealed container 1 can be always in a vacuum state, and only the sealed container 8 formed between the second cooling conducting member 5 and the connection sleeve 6 needs to be filled with helium gas, which can significantly reduce the amount of the supplemented helium gas, thereby further reducing the cost of cooling the magnet.
In addition to the above-described embodiments, it is preferable that the first cooling medium guide 4 includes a flange portion 41 connected to the cold head of the refrigerator 3, a spherical portion 42 detachably connected to the flange portion 41, a rotating portion 44 provided with a hemispherical groove for mounting the spherical portion 42, and a stopper portion 43 connected to the rotating portion 44 for catching the spherical portion 42 in the hemispherical groove, and the spherical portion 42 is rotatable relative to the rotating portion 44 along the spherical groove.
As shown in fig. 3, in the assembling process, the flange portion 41 is connected to the refrigerator 3, the spherical portion 42 is installed in the hemispherical groove of the rotating portion 44, the limiting portion 43 is fixedly connected to the rotating portion 44, the spherical portion 42 is clamped in the hemispherical groove of the limiting portion 43, and the spherical portion 42 is not fixedly connected to the flange. In this way, during assembly, the rotating portion 44 can rotate around the spherical portion 42 to ensure that the contact surface between the first cooling conductive member 4 and the second cooling conductive member 5 can be tightly attached.
The flange and the limiting part 43 are not connected into a whole in a welding mode, and can be machined into the same part. After the spherical portion 42 is mounted on the rotating portion 44, the spherical portion 42 and the rotating portion 44 are connected together by the stopper portion 43.
On the basis of the above-mentioned embodiments, it is preferable that one of the first cold guiding element 4 and the second cold guiding element 5 is provided with a conical projection 521, and the other one is provided with a conical recess 441 inserted in cooperation with the conical projection 521.
In this embodiment, in order to increase the cooling rate of the cooled member 2, the contact surfaces of the first cooling guide member 4 and the second cooling guide member 5 are set to be matched conical surfaces, so as to increase the conductive contact surface. The first cold conducting piece 4 and the second cold conducting piece 5 are made of metal with good heat conductivity coefficient. Specifically, the first cold guiding member 4 is provided with a conical groove 441 with a downward opening, and the second cold guiding member 5 comprises a strip cold guiding member 52 and a conical cold guiding member 51 fixed on the strip cold guiding member 52 and provided with a conical boss 521.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides a low temperature precooling apparatus has carried out the detailed introduction. 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 (6)
1. The utility model provides a low temperature precooling apparatus, its characterized in that is used for placing sealed container (1) by cooling piece (2) including inside, sealed container (1) is equipped with installing port (11) that are used for seal installation refrigerator (3) and is used for to fill in sealed container (1) air supplement unit (7) of helium, the cold head of refrigerator (3) is followed installing port (11) insert in sealed container (1), be connected with first cold piece (4) of leading on the cold head, still include one end and be used for connecting be connected by cooling piece (2), the other end is connected first lead cold piece (5) of leading the second of cold piece (4).
2. The low-temperature precooling apparatus according to claim 1, wherein a connecting sleeve (6) is provided at the mounting port (11), the connecting sleeve (6) includes a first fitting port (61) for being hermetically fitted on an outer wall of the refrigerator (3), and a body of the connecting sleeve (6) has a folding portion (62) with adjustable length.
3. The low-temperature precooling apparatus according to claim 2, wherein the connecting sleeve (6) further includes a second sleeving opening (63) hermetically sleeved on an outer wall of the second cold guide member (5), and the air supply device (7) is disposed on the connecting sleeve (6).
4. The cryogenic precooling apparatus according to claim 1, wherein the first cold conductor (4) includes a flange portion (41) connected to a cold head of the refrigerator (3), a sphere portion (42) detachably connected to the flange portion (41), a rotating portion (44) provided with a hemispherical groove for mounting the sphere portion (42), and a limiting portion (43) connected to the rotating portion (44) for clamping the sphere portion (42) in the hemispherical groove, and the sphere portion (42) is rotatable relative to the rotating portion (44) along the spherical groove.
5. The cryogenic precooling apparatus according to any one of claims 1 to 4, wherein one of the first cold guide member (4) and the second cold guide member (5) is provided with a conical boss (521), and the other one of the first cold guide member and the second cold guide member is provided with a conical recess (441) which is inserted in a matching manner with the conical boss (521).
6. The low-temperature precooling apparatus according to claim 5, wherein the first cold guide member (4) is provided with a conical groove (441) with a downward opening, and the second cold guide member (5) comprises an elongated cold guide member (52) and a conical cold guide member (51) fixed on the elongated cold guide member (52) and provided with a conical boss (521).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023044085.3U CN214043272U (en) | 2020-12-16 | 2020-12-16 | Low-temperature precooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023044085.3U CN214043272U (en) | 2020-12-16 | 2020-12-16 | Low-temperature precooling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214043272U true CN214043272U (en) | 2021-08-24 |
Family
ID=77338167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023044085.3U Active CN214043272U (en) | 2020-12-16 | 2020-12-16 | Low-temperature precooling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214043272U (en) |
-
2020
- 2020-12-16 CN CN202023044085.3U patent/CN214043272U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7266954B2 (en) | Method and device for installing refrigerator | |
| JP6904609B2 (en) | Removable cryostat | |
| CN106531396B (en) | The maintaining method of superconducting magnet component and superconducting magnet component | |
| US20090121561A1 (en) | Machine System with Thermosyphon Cooled Superconductor Rotor Winding | |
| US20170051874A1 (en) | Method and device for precooling a cryostat | |
| CN214043272U (en) | Low-temperature precooling device | |
| CN109612192A (en) | Component including two-stage low temperature refrigeration machine and associated mounting device | |
| CN102867610A (en) | Binary pluggable vapor cooled current lead device | |
| CN103307797A (en) | U-shaped pulse tube refrigerator and infrared device compact type coupled structure and manufacturing method | |
| CN106298148A (en) | Superconducting magnet system and cooling piece | |
| JP5047873B2 (en) | Cryogenic equipment | |
| CN112635150A (en) | Low-temperature precooling device | |
| CN103307798A (en) | Coaxial pulse tube refrigerator and infrared device compact coupled structure and manufacturing method | |
| CN114520086A (en) | Low-temperature cooling device and cooling system of dry superconducting magnet and operation method of cooling system | |
| CN110749115B (en) | Multifunctional low-temperature vortex coil precooling heat exchanger | |
| US4537033A (en) | Cryogenic magnet systems | |
| JP2002270913A (en) | Superconductive coil unit and mri device | |
| CN109243752B (en) | Auxiliary cooling device and cooling equipment | |
| CN213242118U (en) | Low-temperature cooling device and cooling system of dry superconducting magnet | |
| CN213635558U (en) | Cold head transfer structure for superconducting magnet | |
| CN107725320A (en) | A kind of full refrigeration mode cryogenic pump of heavy caliber | |
| CN115183613A (en) | Efficient cold guide device of Stirling refrigerator | |
| CN213519428U (en) | Superconducting magnet | |
| WO2021104244A1 (en) | Cooling device | |
| US20120190552A1 (en) | Precooling device, superconducting magnet and magnetic resonance imaging apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 315300 No. 427, Gaoke Avenue, Cixi High-tech Industrial Development Zone, Ningbo City, Zhejiang Province Patentee after: Ningbo Jianxin Superconducting Technology Co.,Ltd. Address before: 315301 No.427, Gaoke Avenue, Cixi hi tech Industrial Development Zone, Ningbo City, Zhejiang Province Patentee before: NINGBO JANSEN NMR TECHNOLOGY Co.,Ltd. |