CN116092768B - Low-temperature magnet Dewar device and vacuum degree control method - Google Patents
Low-temperature magnet Dewar device and vacuum degree control method Download PDFInfo
- Publication number
- CN116092768B CN116092768B CN202310384945.7A CN202310384945A CN116092768B CN 116092768 B CN116092768 B CN 116092768B CN 202310384945 A CN202310384945 A CN 202310384945A CN 116092768 B CN116092768 B CN 116092768B
- Authority
- CN
- China
- Prior art keywords
- vacuum
- preset
- extraction value
- extraction
- vacuum unit
- 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
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The invention relates to the technical field of low-temperature magnet Dewar devices, and particularly discloses a low-temperature magnet Dewar device and a vacuum degree control method. The cryogenic magnet Dewar device comprises: the dewar comprises a dewar body, wherein a vacuum cavity is arranged in the dewar body; the superconducting module is arranged in the vacuum cavity and fixedly connected with the inner side wall of the vacuum cavity; the environment adjusting module is arranged on one side of the Dewar body, one end of the environment adjusting module penetrates through the Dewar body and is arranged inside the vacuum cavity, and the environment adjusting module is used for adjusting the environment of the vacuum cavity. Through setting up the environment adjustment module in Dewar body one end for adjust the internal environment of vacuum cavity in the Dewar body, remain the superconducting module in working all the time to vacuum degree and temperature's demand, and then extension low temperature magnet Dewar device life has reduced the cost of low temperature magnet Dewar device later maintenance simultaneously.
Description
Technical Field
The invention relates to the technical field of low-temperature magnet Dewar, in particular to a low-temperature magnet Dewar device and a vacuum degree control method.
Background
The superconducting magnet energy storage is used as a novel energy storage mode, can rapidly realize active and reactive power compensation, and has good application prospects in improving the stability of a power system, inhibiting low-frequency oscillation and improving the power supply quality. However, unlike conventional energy storage methods, superconducting magnets can only operate in a low-temperature environment below the temperature of liquid nitrogen, and the inside of a container needs to be evacuated, that is, safe and reliable low-temperature refrigeration and vacuum environment are necessary conditions for the operation of the superconducting magnets.
At present, du Walai is generally adopted as a cooling container of a superconducting magnet in traditional equipment, wherein the space of the dewar is pumped to be vacuum, and the cooling is performed by adopting liquid helium or liquid nitrogen to be directly immersed for cooling and adopting a refrigerator, but in daily use, the superconducting magnet cannot be ensured to be always in a vacuum environment because of being sealed, so that the superconducting magnet is invalid, and the dewar is exploded to cause great loss of safety and property of a user.
In view of the above, there is an urgent need to invent a magnet dewar for solving the problem that the superconducting magnet is disabled and cannot be used when the superconducting magnet cannot be in a vacuum environment in daily use.
Disclosure of Invention
The invention aims to provide a low-temperature magnet Dewar device and a vacuum degree control method, which are used for preventing the problem that a superconducting magnet is invalid due to the fact that the superconducting magnet cannot be guaranteed to be in a vacuum environment in real time in traditional equipment.
In one aspect, an embodiment of the present invention provides a cryogenic magnet dewar apparatus comprising:
the dewar comprises a dewar body, wherein a vacuum cavity is arranged in the dewar body;
the superconducting module is arranged in the vacuum cavity and is fixedly connected with the inner side wall of the vacuum cavity;
the environment adjustment module is arranged on one side of the dewar body, one end of the environment adjustment module penetrates through the dewar body and is arranged inside the vacuum cavity, and the environment adjustment module is used for adjusting the environment of the vacuum cavity.
Further, the dewar body includes:
the middle part of the inner cylinder is provided with a through cavity;
the two Dewar cover plates are arranged on two sides of the inner cylinder in the opposite direction along the arrangement direction of the inner cylinder, and the Dewar cover plates are fixedly connected with the inner cylinder;
the outer cylinder is sleeved on the outer side of the inner cylinder and fixedly connected with the Dewar cover plate, and a vacuum cavity is arranged between the outer cylinder and the inner cylinder.
Further, the superconducting module includes:
the superconducting coil is arranged in the vacuum cavity;
the support frame is arranged in the vacuum cavity, the support frame is connected with the outer side wall of the inner cylinder, and the support frame is used for fixing the superconducting coil when the superconducting coil is contacted with the outer side wall of the inner cylinder.
Further, the environment adjustment module includes:
the shell passes through the side wall of the outer cylinder and is arranged in the vacuum cavity, and the shell is fixedly connected with the outer cylinder so as to be communicated with the vacuum cavity;
the vacuum unit is arranged at the lower part of the shell and is connected with the shell so that when the shell is communicated with the vacuum cavity, the vacuum unit can extract air in the vacuum cavity;
and the control unit is electrically connected with the vacuum unit and is used for controlling the vacuum unit.
Further, the control unit includes:
the acquisition subunit is used for acquiring pressure information in the vacuum cavity and extraction amount information of the vacuum unit;
and the processing subunit is used for controlling the vacuum unit according to the pressure information acquired by the acquisition subunit.
Further, the processing subunit is further configured to obtain a current pressure value Δt in the pressure information, and is further configured to preset a standard pressure value T0, and the processing subunit is configured to determine whether the vacuum degree in the vacuum cavity is at an optimal vacuum degree according to a relationship between the current pressure value Δt and the preset standard pressure value T0;
if the current pressure value DeltaT is less than or equal to a preset standard pressure value T0, the processing subunit judges that the vacuum degree in the vacuum cavity is at the optimal vacuum degree;
if the current pressure value DeltaT is larger than a preset standard pressure value T0, the processing subunit judges that the vacuum degree in the vacuum cavity is not in the optimal vacuum degree, and the processing subunit is further used for adjusting the extraction amount information of the vacuum unit according to the current pressure value DeltaT-T0 between the current pressure value DeltaT and the preset standard pressure value T0.
Further, the processing subunit is further configured to, when adjusting the extraction amount information of the vacuum unit according to a current pressure value difference Δt-T0 between the current pressure value Δt and a preset standard pressure value T0, include:
the processing subunit is further used for acquiring a real-time extraction value delta Y in the extraction amount information of the vacuum unit;
the processing subunit is further configured to preset a first preset pressure value difference G1, a second preset pressure value difference G2, a third preset pressure value difference G3, and a fourth preset pressure value difference G4, where G1 is greater than G2 and less than G3 is greater than G4; the processing subunit is further configured to preset a first preset extraction value adjustment coefficient H1, a second preset extraction value adjustment coefficient H2, a third preset extraction value adjustment coefficient H3, and a fourth preset extraction value adjustment coefficient H4, where H1 is greater than 0.5 and H2 is greater than 0.1 and H3 is greater than 0.25;
the processing subunit is further configured to adjust an extraction value of the vacuum unit according to a relationship between the current pressure value difference Δt-T0 and each preset pressure value difference;
when DeltaT-T0 is less than G1, selecting the first preset extraction value adjusting coefficient H1 to adjust the extraction value DeltaY of the vacuum unit, wherein the extraction value of the vacuum unit after adjustment is DeltaY H1;
when G1 is less than or equal to delta T0 and less than G2, selecting the second preset extraction value adjustment coefficient H2 to adjust the extraction value delta Y of the vacuum unit, wherein the extraction value of the vacuum unit after adjustment is delta Y H2;
when G2 is less than or equal to delta T-T0 and less than G3, selecting the third preset extraction value adjustment coefficient H3 to adjust the extraction value delta Y of the vacuum unit, wherein the extraction value of the vacuum unit after adjustment is delta Y H3;
when G3 is less than or equal to delta T0 and less than G4, the fourth preset extraction value adjusting coefficient H4 is selected to adjust the extraction value delta Y of the vacuum unit, and the extraction value of the vacuum unit after adjustment is delta Y H4.
Further, the processing subunit is further configured to adjust, when the i-th preset extraction value adjustment coefficient Hi is selected, the extraction value Δy of the vacuum unit, and obtain an adjusted extraction value Δy×hi of the vacuum unit, where i=1, 2,3,4, and the processing subunit includes:
the processing subunit is further used for acquiring the current air leakage rate delta P of the vacuum cavity, the processing subunit is further used for presetting a standard air leakage rate P0, and the processing subunit is used for judging whether the current air leakage rate in the vacuum cavity is in the optimal air leakage rate according to the relation between the current air leakage rate delta P and the preset standard air leakage rate P0;
when DeltaP is less than or equal to P0, the processing subunit judges that the current leakage rate DeltaP of the vacuum cavity is at the optimal leakage rate;
when Δp > P0, the processing subunit determines that the current air leakage rate Δp of the vacuum cavity is not at the optimal air leakage rate, and is further configured to correct the extraction value Δy×hi of the adjusted vacuum unit according to the current air leakage rate Δp.
Further, the processing subunit is further configured to, when correcting the extraction value Δy×hi of the adjusted vacuum unit according to the current leakage rate Δp, include:
the processing subunit is further configured to preset a first preset air leakage rate P1, a second preset air leakage rate P2, a third preset air leakage rate P3, and a fourth preset air leakage rate P4, where P1 is greater than P2 and less than P3 and less than P4; the processing subunit is further configured to preset a first preset extraction value correction coefficient C1, a second preset extraction value correction coefficient C2, a third preset extraction value correction coefficient C3, and a fourth preset extraction value correction coefficient C4, where C1 is greater than 0 and C2 is greater than 0 and C3 is greater than 0.75;
the processing subunit is further configured to correct an extraction value Δy×hi of the vacuum unit according to a relationship between the current air leakage rate Δp and each preset air leakage rate;
when Δp is less than P1, selecting the first preset extraction value correction coefficient C1 to correct the extraction value Δy×hi of the vacuum unit, where the corrected extraction value of the vacuum unit is Δy×hi×c1;
when P1 is less than or equal to DeltaP < P2, selecting the second preset extraction value correction coefficient C2 to correct the extraction value DeltaY Hi of the vacuum unit, wherein the corrected extraction value of the vacuum unit is DeltaY Hi C2;
when P2 is less than or equal to DeltaP < P3, selecting the third preset extraction value correction coefficient C3 to correct the extraction value DeltaY Hi of the vacuum unit, wherein the corrected extraction value of the vacuum unit is DeltaY Hi C3;
when P3 is less than or equal to DeltaP < P4, the fourth preset extraction value correction coefficient C4 is selected to correct the extraction value DeltaY Hi of the vacuum unit, and the corrected extraction value DeltaY Hi C4 of the vacuum unit.
On the other hand, the invention provides a vacuum degree control method, which is applied to the low-temperature magnet Dewar device and comprises the following steps:
detecting pressure information in a vacuum cavity in a low-temperature magnet Dewar device in real time, wherein the pressure information comprises a pressure value difference in the vacuum cavity and an air leakage rate in the vacuum cavity;
and controlling the extraction value of the vacuum unit according to the pressure value difference in the vacuum cavity and the air leakage rate in the vacuum cavity.
Compared with the prior art, the low-temperature magnet Dewar device and the vacuum degree control method have the beneficial effects that:
through setting up the environment adjustment module in Dewar body one end for adjust the internal environment of vacuum cavity in the Dewar body, remain the superconducting module in work all the time to vacuum degree and temperature's demand, control the vacuum unit in real time through setting up the control unit, make superconducting module keep working under the vacuum environment all the time, avoided superconducting module to appear the problem of inefficacy, thereby extension low temperature magnet Dewar device life has reduced the cost of low temperature magnet Dewar device later maintenance simultaneously.
Drawings
Fig. 1 is a schematic cross-sectional view of a cryogenic magnet dewar apparatus according to an embodiment of the present invention.
Fig. 2 is a block diagram of the control unit in the embodiment of the present invention.
Fig. 3 is a block diagram of a vacuum control method according to an embodiment of the present invention.
110, an outer cylinder; 120. a Dewar cover plate; 130. an inner cylinder; 210. a superconducting coil; 220. a support frame; 310. a housing; 320. a vacuum unit; 331. a refrigerating machine; 332. a primary cold head; 333. a second-stage cold head; 334. a cold guide module; 335. and (5) cooling the screen.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
At present, du Walai is generally adopted as a cooling container of a superconducting magnet in traditional equipment, namely, the space of a Dewar is pumped to vacuum, then liquid helium or liquid nitrogen is adopted to be directly soaked and cooled, and a refrigerator is adopted to perform cooling, but in daily use, the superconducting magnet cannot be ensured to be always in a vacuum environment because of sealing, so that the superconducting magnet is invalid, and the Dewar explosion is caused to cause great loss of safety and property of a user.
The invention aims to provide a low-temperature magnet Dewar device and a vacuum degree control method, which are used for preventing the problem that a superconducting magnet is invalid due to the fact that the superconducting magnet cannot be guaranteed to be in a vacuum environment in real time in traditional equipment.
As shown in fig. 1, a cryogenic magnet dewar apparatus according to a preferred embodiment of the present invention comprises: the device comprises a Dewar body, a superconducting module and an environment adjusting module.
Specifically, the dewar body is internally provided with a vacuum cavity; the superconducting module is arranged in the vacuum cavity and is fixedly connected with the inner side wall of the vacuum cavity; the environment adjustment module is arranged on one side of the Dewar body, one end of the environment adjustment module penetrates through the Dewar body and is arranged inside the vacuum cavity, and the environment adjustment module is used for adjusting the environment of the vacuum cavity.
It can be seen that the low-temperature magnet dewar device in the embodiment of the invention is composed of a dewar body provided with a vacuum cavity, a superconducting module and an adjusting module for adjusting the environment in the vacuum cavity.
It can be understood that the environment inside the vacuum cavity is adjusted in real time through the environment adjusting module, so that the superconducting module always works under the optimal vacuum degree and temperature, and the situation that the superconducting module fails in use is prevented.
Specifically, in preferred embodiments of some embodiments of the present invention the dewar body comprises: an inner barrel 130, a Dewar cover 120, and an outer barrel 110.
Specifically, a through cavity is arranged in the middle of the inner cylinder 130; the two Dewar cover plates 120 are arranged, the two Dewar cover plates 120 are oppositely arranged at two sides of the inner cylinder 130 along the arrangement direction of the inner cylinder 130, and the Dewar cover plates 120 are fixedly connected with the inner cylinder 130; the outer cylinder 110 is sleeved outside the inner cylinder 130, the outer cylinder 110 is fixedly connected with the Dewar cover plate 120, and a vacuum cavity is arranged between the outer cylinder 110 and the inner cylinder 130.
It can be understood that the dewar body in the embodiment of the present invention is composed of an inner cylinder 130, a dewar cover 120 and an outer cylinder 110, wherein the two dewar covers 120 are fixed at two ends of the inner cylinder 130, and the outer cylinder 110 is sleeved outside the inner cylinder 130 and then fixed with the dewar cover 120, so that a vacuum sealing cavity is formed between the outer cylinder 110 and the inner cylinder 130.
Specifically, in some embodiments of the invention the superconducting module comprises: superconducting coil 210 and support 220.
Specifically, the superconducting coil 210 is disposed inside the vacuum chamber; the support 220 is disposed inside the vacuum chamber, the support 220 is connected to the outer sidewall of the inner cylinder 130, and the support 220 is used for fixing the superconducting coil 210 when the superconducting coil 210 contacts the outer sidewall of the inner cylinder 130.
It can be seen that the superconducting module in the embodiment of the present invention is composed of the superconducting coil 210 wound on the outer wall of the inner cylinder 130, and the supporting frame 220 for fixing the superconducting coil 210, and further fixes the superconducting coil 210 when the supporting frame 220 is fixedly connected with the outer wall of the inner cylinder 130.
It can be appreciated that when the superconducting coil 210 is wound and installed, the superconducting coil 210 cannot be connected with the outer side wall of the inner cylinder 130, and the superconducting coil 210 is fixed by the supporting frame 220, so that the problem that the superconducting coil 210 falls off from the outer side wall of the inner cylinder 130 in the working process of the superconducting coil 210 is avoided.
Specifically, in a preferred implementation of some embodiments of the present invention, the environment adjustment module includes: a housing 310, a vacuum unit 320, and a control unit.
Specifically, one side of the housing 310 passes through the side wall of the outer cylinder 110 and is arranged in the vacuum cavity, and the housing 310 is fixedly connected with the outer cylinder 110 so that the housing 310 is communicated with the vacuum cavity; the vacuum unit 320 is disposed at the lower portion of the housing 310, and the vacuum unit 320 is connected with the housing 310 such that when the housing 310 is communicated with the vacuum chamber, the vacuum unit 320 extracts air in the vacuum chamber; the control unit is electrically connected with the vacuum unit 320, and is used for controlling the vacuum unit 320.
It can be seen that, in the embodiment of the present invention, the environment adjustment module is composed of a housing 310, a vacuum unit 320 and a control unit, and one side of the housing 310 is penetrated through the sidewall of the outer cylinder 110, so that the inner space of the housing 310 is communicated with the vacuum cavity, and further, the vacuum unit 320 disposed at the lower part of the housing 310 extracts air in the vacuum cavity, and then the control unit controls the extraction amount of the vacuum unit 320 in real time.
Preferably, the vacuum unit 320 is composed of a vacuum pump, or a vacuum manufacturing apparatus.
Preferably, a pressure sensor is further disposed inside the housing 310 for acquiring information of the pressure inside the vacuum chamber.
It can be appreciated that the control unit is provided to control the vacuum unit 320 composed of the vacuum pump or the vacuum manufacturing apparatus, so that the vacuum degree in the vacuum chamber is always maintained at the optimal vacuum degree, thereby prolonging the service life of the magnet dewar and further reducing the maintenance cost of the magnet dewar.
Example two
As a preferred embodiment of the present invention, a cooling module is added to the environment adjustment module according to the first embodiment.
Referring to fig. 1, a cooling module according to some embodiments of the present invention includes: refrigerator 331, first order cold head 332, second order cold head 333, cold screen 335 and cold guide module 334.
Specifically, the refrigerator 331 is disposed at the top end of the housing 310, and one end of the refrigerator 331 is disposed inside the housing 310 through the outer side wall of the housing 310; the primary cold head 332 is arranged inside the shell 310, and one end of the primary cold head 332 is communicated with one end of the refrigerator 331 penetrating through the outer side wall of the shell 310, so that the refrigerator 331 cools the inside of the vacuum cavity; the secondary cold head 333 is arranged at the other end of the primary cold head 332, and one end of the secondary cold head 333 is communicated with the other end of the primary cold head 332; the cold shield 335 is arranged inside the vacuum cavity, and the cold shield 335 is connected with the superconducting coil 210; the cold guiding module 334 is disposed inside the vacuum cavity, one end of the cold guiding module 334 is connected with the cold screen 335, and the other end of the cold guiding module 334 is disposed below the secondary cold head 333, so that the cold guiding module 334 conducts the cooling temperature released by the secondary cold head 333 to the cold screen 335 to cool the superconducting coil 210.
It can be understood that the cooling module in the embodiment of the present invention is composed of a refrigerator 331, a primary cooling head 332, a secondary cooling head 333, a cooling screen 335 and a cooling module 334, the temperature inside the vacuum cavity is adjusted by the primary cooling head 332, and then the temperature of the superconducting coil 210 is cooled by the secondary cooling head 333, the cooling module 334 and the cooling screen 335, so as to ensure that the superconducting coil 210 works in a low-temperature environment.
In summary, it can be understood that the embodiment of the invention is composed of the dewar body provided with the vacuum cavity, the superconducting coil 210 wound outside the dewar inner cylinder 130 and the supporting frame 220 for fixing the superconducting coil 210 in the vacuum cavity, and the environment adjusting module provided at one side of the dewar outer cylinder 110 and composed of the shell 310, the cooling module, the vacuum unit 320 and the control unit, wherein the control unit adjusts the suction amount of the vacuum unit 320 according to the vacuum degree in the vacuum cavity, and the cooling module reduces the temperature of the superconducting coil 210 and adjusts the environmental temperature in the vacuum cavity, thereby ensuring that the superconducting coil 210 always works at the optimal temperature and the optimal vacuum degree, avoiding the problem of failure of the superconducting coil 210, further prolonging the service life of the low-temperature magnet dewar device, and reducing the cost of later maintenance.
According to the preferred embodiments of the embodiments described above, referring to fig. 2, the control unit in the embodiment of the present invention includes: an acquisition subunit and a processing subunit.
Specifically, the collecting subunit is configured to obtain pressure information in the vacuum cavity and extraction amount information of the vacuum unit 320; the processing subunit is configured to control the vacuum unit 320 according to the pressure information acquired by the acquisition subunit.
It can be understood that the control unit in the embodiment of the present invention is composed of an acquisition subunit and a processing subunit, the acquisition subunit is used for acquiring the pressure information in the vacuum cavity and the extraction amount information of the vacuum unit 320, and the processing subunit is used for controlling the vacuum unit 320 according to the pressure information acquired by the acquisition subunit, so as to ensure that the superconducting module always works in the optimal vacuum environment, and avoid the problem of failure of the superconducting module.
Specifically, the processing subunit is further configured to obtain a current pressure value Δt in the pressure information, and the processing subunit is further configured to preset a standard pressure value T0, and determine whether the vacuum degree in the vacuum cavity is at an optimal vacuum degree according to a relationship between the current pressure value Δt and the preset standard pressure value T0:
if the current pressure value DeltaT is less than or equal to the preset standard pressure value T0, the processing subunit judges that the vacuum degree in the vacuum cavity is at the optimal vacuum degree.
If the current pressure value Δt is greater than the preset standard pressure value T0, the processing subunit determines that the vacuum degree in the vacuum chamber is not at the optimal vacuum degree, and the processing subunit is further configured to adjust the extraction amount information of the vacuum unit 320 according to the current pressure value Δt-T0 between the current pressure value Δt and the preset standard pressure value T0.
It can be understood that the processing subunit compares the obtained pressure value in the vacuum cavity with a preset standard pressure value to further determine whether the current vacuum degree in the vacuum cavity is the optimal vacuum degree, and adjusts the extraction amount of the vacuum unit 320 according to the difference between the current pressure value and the preset standard pressure value if the current vacuum degree in the vacuum cavity is not the optimal vacuum degree.
Specifically, the processing subunit is further configured to, when adjusting the extraction amount information of the vacuum unit according to the current pressure value Δt-T0 between the current pressure value Δt and the preset standard pressure value T0, include:
the processing subunit is further configured to obtain a real-time extraction value Δy in the extraction amount information of the vacuum unit 320.
The processing subunit is further configured to preset a first preset pressure value difference G1, a second preset pressure value difference G2, a third preset pressure value difference G3, and a fourth preset pressure value difference G4, where G1 is greater than G2 and less than G3 is greater than G4; the processing subunit is further configured to preset a first preset extraction value adjustment coefficient H1, a second preset extraction value adjustment coefficient H2, a third preset extraction value adjustment coefficient H3, and a fourth preset extraction value adjustment coefficient H4, where H1 is greater than 0.5 and H2 is greater than 0.2 and H3 is greater than 0.25 and is less than 1.25.
The processing subunit is further configured to adjust the extraction value of the vacuum unit 320 according to the relationship between the current pressure value difference Δt-T0 and each preset pressure value difference:
when DeltaT-T0 is less than G1, selecting a first preset extraction value adjusting coefficient H1 to adjust the extraction value DeltaY of the vacuum unit 320, wherein the extraction value of the vacuum unit 320 after adjustment is DeltaY H1;
when G1 is less than or equal to delta T-T0 and less than G2, selecting a second preset extraction value adjustment coefficient H2 to adjust the extraction value delta Y of the vacuum unit, wherein the extraction value delta Y of the vacuum unit 320 after adjustment is delta Y H2;
when G2 is less than or equal to delta T-T0 and less than G3, selecting a third preset extraction value adjustment coefficient H3 to adjust the extraction value delta Y of the vacuum unit, wherein the extraction value of the vacuum unit 320 after adjustment is delta Y H3;
when G3 is less than or equal to DeltaT-T0 and less than G4, a fourth preset extraction value adjusting coefficient H4 is selected to adjust the extraction value DeltaY of the vacuum unit, and the extraction value of the vacuum unit 320 after adjustment is DeltaY H4.
It can be appreciated that the processing subunit adjusts the extraction amount of the vacuum unit 320 in real time through the difference between the current pressure value and the preset standard pressure value, so as to ensure that the superconducting coil 210 in the vacuum chamber always works in the optimal vacuum environment.
Specifically, the processing subunit is further configured to adjust the extraction value Δy of the vacuum unit when the i-th preset extraction value adjustment coefficient Hi is selected, and obtain the adjusted extraction value Δy of the vacuum unit 320, where i=1, 2,3,4, and includes:
the processing subunit is further configured to obtain a current air leakage rate Δp of the vacuum chamber, and the processing subunit is further configured to preset a standard air leakage rate P0, and determine whether the current air leakage rate in the vacuum chamber is at an optimal air leakage rate according to a relationship between the current air leakage rate Δp and the preset standard air leakage rate P0:
when DeltaP is less than or equal to P0, the processing subunit determines that the current leakage rate DeltaP of the vacuum cavity is at the optimal leakage rate.
When Δp > P0, the processing subunit determines that the current air leakage rate Δp of the vacuum chamber is not at the optimal air leakage rate, and is further configured to correct the adjusted extraction value Δy×hi of the vacuum unit 320 according to the current air leakage rate Δp.
It can be understood that the processing subunit is further configured to compare the air leakage rate in the vacuum cavity with a preset standard air leakage rate, further determine whether the air leakage rate in the vacuum cavity is at the standard air leakage rate, correct the extraction amount of the adjusted vacuum unit 320 according to the air leakage rate in the current vacuum cavity if the air leakage rate in the current vacuum cavity is not at the preset standard air leakage rate, and further ensure that the superconducting coil 210 in the vacuum cavity is always in an optimal vacuum environment for working.
Specifically, the processing subunit is further configured to, when correcting the extraction value Δy×hi of the adjusted vacuum unit 320 according to the current leakage rate Δp, include:
the processing subunit is further configured to preset a first preset air leakage rate P1, a second preset air leakage rate P2, a third preset air leakage rate P3, and a fourth preset air leakage rate P4, where P1 is greater than P2 and less than P3 and less than P4; the processing subunit is further configured to preset a first preset extraction value correction coefficient C1, a second preset extraction value correction coefficient C2, a third preset extraction value correction coefficient C3, and a fourth preset extraction value correction coefficient C4, where C0 is greater than C1 and less than C2 and less than C3 and less than C4 and less than 0.75;
the processing subunit is further configured to correct the extraction value Δy×hi of the vacuum unit 320 according to the relationship between the current air leakage rate Δp and each preset air leakage rate;
when Δp < P1, selecting a first preset extraction value correction coefficient C1 to correct the extraction value Δy×hi of the vacuum unit 320, where the corrected extraction value of the vacuum unit 320 is Δy×hi×c1;
when P1 is less than or equal to DeltaP < P2, selecting a second preset extraction value correction coefficient C2 to correct the extraction value DeltaY Hi of the vacuum unit 320, wherein the corrected extraction value of the vacuum unit 320 is DeltaY Hi C2;
when P2 is less than or equal to DeltaP < P3, a third preset extraction value correction coefficient C3 is selected to correct the extraction value DeltaY Hi of the vacuum unit 320, and the corrected extraction value of the vacuum unit 320 is DeltaY Hi C3;
when P3 is less than or equal to Δp < P4, a fourth preset extraction value correction coefficient C4 is selected to correct the extraction value Δy×hi of the vacuum unit 320, and the corrected extraction value of the vacuum unit 320 is Δy×hi×c4.
It can be appreciated that, in the embodiment of the present invention, the processing subunit corrects the extraction amount of the adjusted vacuum unit 320 in real time by obtaining the current air leakage rate, so as to avoid the problem that the air leaked into the vacuum cavity cannot be timely discharged cleanly due to the fact that the air leakage rate is larger and the extraction amount is smaller.
Based on the same technical concept, referring to fig. 3, the embodiment of the invention further provides a vacuum degree control method, which is applied to a low-temperature magnet dewar device and includes:
and detecting pressure information in a vacuum cavity in the cryogenic magnet Dewar device in real time, wherein the pressure information comprises a pressure value difference in the vacuum cavity and a leakage rate in the vacuum cavity.
The extraction value of the vacuum unit 320 is controlled according to the pressure value difference in the vacuum chamber and the air leakage rate in the vacuum chamber.
In summary, the embodiment of the invention provides a low-temperature magnet Dewar device and a vacuum degree control method, which have the following beneficial effects: the environment adjusting module is arranged at one end of the Dewar body and used for adjusting the internal environment of the vacuum cavity in the Dewar body, the requirements on the vacuum degree and the temperature in the working process of the superconducting module are always kept, the vacuum unit 320 is controlled in real time through the control unit, the superconducting module is enabled to work in the vacuum environment all the time, the problem that the superconducting module fails is avoided, the service life of the low-temperature magnet Dewar device is prolonged, and the later maintenance cost of the low-temperature magnet Dewar device is reduced.
The foregoing is merely an example of the present invention, and the scope of the present invention is not limited thereto, and all changes made in the structure according to the present invention should be considered as falling within the scope of the present invention without departing from the gist of the present invention.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the system described above and the related description may refer to the corresponding process in the foregoing method embodiment, which is not repeated here.
It should be noted that, in the system provided in the foregoing embodiment, only the division of the foregoing functional modules is illustrated, in practical application, the foregoing functional allocation may be performed by different functional modules, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps related to the embodiments of the present invention are merely for distinguishing the respective modules or steps, and are not to be construed as unduly limiting the present invention.
Those of skill in the art will appreciate that the various illustrative modules, method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the program(s) corresponding to the software modules, method steps, may be embodied in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. To clearly illustrate this interchangeability of electronic hardware and software, various illustrative components and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not intended to be limiting.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus/apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus/apparatus.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (4)
1. A cryogenic magnet dewar assembly comprising:
the dewar comprises a dewar body, wherein a vacuum cavity is arranged in the dewar body;
the superconducting module is arranged in the vacuum cavity and is fixedly connected with the inner side wall of the vacuum cavity;
the environment adjusting module is arranged on one side of the dewar body, one end of the environment adjusting module penetrates through the dewar body and is arranged in the vacuum cavity, and the environment adjusting module is used for adjusting the environment of the vacuum cavity;
the dewar body includes:
the middle part of the inner cylinder is provided with a through cavity;
the two Dewar cover plates are arranged on two sides of the inner cylinder in the opposite direction along the arrangement direction of the inner cylinder, and the Dewar cover plates are fixedly connected with the inner cylinder;
the outer cylinder is sleeved outside the inner cylinder, the outer cylinder is fixedly connected with the Dewar cover plate, and a vacuum cavity is arranged between the outer cylinder and the inner cylinder;
the environment adjustment module includes:
the shell passes through the side wall of the outer cylinder and is arranged in the vacuum cavity, and the shell is fixedly connected with the outer cylinder so as to be communicated with the vacuum cavity;
the vacuum unit is arranged at the lower part of the shell and is connected with the shell so that when the shell is communicated with the vacuum cavity, the vacuum unit can extract air in the vacuum cavity;
the control unit is electrically connected with the vacuum unit and is used for controlling the vacuum unit;
the control unit includes:
the acquisition subunit is used for acquiring pressure information in the vacuum cavity and extraction amount information of the vacuum unit;
the processing subunit is used for controlling the vacuum unit according to the pressure information acquired by the acquisition subunit;
the processing subunit is further used for acquiring a current pressure value delta T in the pressure information, the processing subunit is further used for presetting a standard pressure value T0, and the processing subunit is used for judging whether the vacuum degree in the vacuum cavity is in the optimal vacuum degree according to the relation between the current pressure value delta T and the preset standard pressure value T0;
if the current pressure value DeltaT is less than or equal to a preset standard pressure value T0, the processing subunit judges that the vacuum degree in the vacuum cavity is at the optimal vacuum degree;
if the current pressure value DeltaT is larger than a preset standard pressure value T0, the processing subunit judges that the vacuum degree in the vacuum cavity is not in the optimal vacuum degree, and the processing subunit is further used for adjusting the extraction amount information of the vacuum unit according to the current pressure value DeltaT-T0 between the current pressure value DeltaT and the preset standard pressure value T0;
the processing subunit is further configured to, when adjusting the extraction amount information of the vacuum unit according to a current pressure value difference Δt-T0 between a current pressure value Δt and a preset standard pressure value T0, include:
the processing subunit is further used for acquiring a real-time extraction value delta Y in the extraction amount information of the vacuum unit;
the processing subunit is further configured to preset a first preset pressure value difference G1, a second preset pressure value difference G2, a third preset pressure value difference G3, and a fourth preset pressure value difference G4, where G1 is greater than G2 and less than G3 is greater than G4; the processing subunit is further configured to preset a first preset extraction value adjustment coefficient H1, a second preset extraction value adjustment coefficient H2, a third preset extraction value adjustment coefficient H3, and a fourth preset extraction value adjustment coefficient H4, where H1 is greater than 0.5 and H2 is greater than 0.1 and H3 is greater than 0.25;
the processing subunit is further configured to adjust an extraction value of the vacuum unit according to a relationship between the current pressure value difference Δt-T0 and each preset pressure value difference;
when DeltaT-T0 is less than G1, selecting the first preset extraction value adjusting coefficient H1 to adjust the extraction value DeltaY of the vacuum unit, wherein the extraction value of the vacuum unit after adjustment is DeltaY H1;
when G1 is less than or equal to delta T0 and less than G2, selecting the second preset extraction value adjustment coefficient H2 to adjust the extraction value delta Y of the vacuum unit, wherein the extraction value of the vacuum unit after adjustment is delta Y H2;
when G2 is less than or equal to delta T-T0 and less than G3, selecting the third preset extraction value adjustment coefficient H3 to adjust the extraction value delta Y of the vacuum unit, wherein the extraction value of the vacuum unit after adjustment is delta Y H3;
when G3 is less than or equal to delta T0 and less than G4, selecting the fourth preset extraction value adjustment coefficient H4 to adjust the extraction value delta Y of the vacuum unit, wherein the extraction value of the vacuum unit after adjustment is delta Y H4;
the processing subunit is further configured to adjust, when an i-th preset extraction value adjustment coefficient Hi is selected, an extraction value Δy of the vacuum unit, and obtain an adjusted extraction value Δy×hi of the vacuum unit, where i=1, 2,3,4, and the processing subunit includes:
the processing subunit is further used for acquiring the current air leakage rate delta P of the vacuum cavity, the processing subunit is further used for presetting a standard air leakage rate P0, and the processing subunit is used for judging whether the current air leakage rate in the vacuum cavity is in the optimal air leakage rate according to the relation between the current air leakage rate delta P and the preset standard air leakage rate P0;
when DeltaP is less than or equal to P0, the processing subunit judges that the current leakage rate DeltaP of the vacuum cavity is at the optimal leakage rate;
when Δp > P0, the processing subunit determines that the current air leakage rate Δp of the vacuum cavity is not at the optimal air leakage rate, and is further configured to correct the extraction value Δy×hi of the adjusted vacuum unit according to the current air leakage rate Δp.
2. The cryogenic magnet dewar assembly of claim 1, wherein said superconducting module comprises:
the superconducting coil is arranged in the vacuum cavity;
the support frame is arranged in the vacuum cavity, the support frame is connected with the outer side wall of the inner cylinder, and the support frame is used for fixing the superconducting coil when the superconducting coil is contacted with the outer side wall of the inner cylinder.
3. The cryogenic magnet Dewar device of claim 1,
the processing subunit is further configured to, when correcting the extraction value Δy×hi of the adjusted vacuum unit according to the current leakage rate Δp, include:
the processing subunit is further configured to preset a first preset air leakage rate P1, a second preset air leakage rate P2, a third preset air leakage rate P3, and a fourth preset air leakage rate P4, where P1 is greater than P2 and less than P3 and less than P4; the processing subunit is further configured to preset a first preset extraction value correction coefficient C1, a second preset extraction value correction coefficient C2, a third preset extraction value correction coefficient C3, and a fourth preset extraction value correction coefficient C4, where C1 is greater than 0 and C2 is greater than 0 and C3 is greater than 0.75;
the processing subunit is further configured to correct an extraction value Δy×hi of the vacuum unit according to a relationship between the current air leakage rate Δp and each preset air leakage rate;
when Δp is less than P1, selecting the first preset extraction value correction coefficient C1 to correct the extraction value Δy×hi of the vacuum unit, where the corrected extraction value of the vacuum unit is Δy×hi×c1;
when P1 is less than or equal to DeltaP < P2, selecting the second preset extraction value correction coefficient C2 to correct the extraction value DeltaY Hi of the vacuum unit, wherein the corrected extraction value of the vacuum unit is DeltaY Hi C2;
when P2 is less than or equal to DeltaP < P3, selecting the third preset extraction value correction coefficient C3 to correct the extraction value DeltaY Hi of the vacuum unit, wherein the corrected extraction value of the vacuum unit is DeltaY Hi C3;
when P3 is less than or equal to DeltaP < P4, the fourth preset extraction value correction coefficient C4 is selected to correct the extraction value DeltaY Hi of the vacuum unit, and the corrected extraction value DeltaY Hi C4 of the vacuum unit.
4. A vacuum degree control method applied to the cryogenic magnet dewar apparatus as claimed in any one of claims 1 to 3, comprising:
detecting pressure information in a vacuum cavity in a low-temperature magnet Dewar device in real time, wherein the pressure information comprises a pressure value difference in the vacuum cavity and an air leakage rate in the vacuum cavity;
and controlling the extraction value of the vacuum unit according to the pressure value difference in the vacuum cavity and the air leakage rate in the vacuum cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310384945.7A CN116092768B (en) | 2023-04-12 | 2023-04-12 | Low-temperature magnet Dewar device and vacuum degree control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310384945.7A CN116092768B (en) | 2023-04-12 | 2023-04-12 | Low-temperature magnet Dewar device and vacuum degree control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116092768A CN116092768A (en) | 2023-05-09 |
| CN116092768B true CN116092768B (en) | 2023-06-23 |
Family
ID=86202990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310384945.7A Active CN116092768B (en) | 2023-04-12 | 2023-04-12 | Low-temperature magnet Dewar device and vacuum degree control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116092768B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000148254A (en) * | 1998-11-13 | 2000-05-26 | Ckd Corp | Vacuum pressure controller |
| JP2011134336A (en) * | 2011-01-24 | 2011-07-07 | Ckd Corp | Vacuum pressure control system and vacuum pressure control program |
| CN113607347A (en) * | 2021-07-23 | 2021-11-05 | 山东非金属材料研究所 | Method and device for detecting leakage of vacuum hot-press molding composite armor material |
| CN115060761A (en) * | 2022-08-17 | 2022-09-16 | 山东美生热能科技有限公司 | Heat-insulating oil casing vacuum extraction supervisory control system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5647435A (en) * | 1995-09-25 | 1997-07-15 | Pes, Inc. | Containment of downhole electronic systems |
| CN101751056A (en) * | 2008-12-10 | 2010-06-23 | 中国科学院沈阳科学仪器研制中心有限公司 | Vacuum system constant voltage constant current regulator and control method thereof |
| CN101498642B (en) * | 2009-03-12 | 2012-04-18 | 四川亚联高科技股份有限公司 | Accurate tester for sorbent and method thereof |
| CN103377788A (en) * | 2012-04-27 | 2013-10-30 | 中国科学院高能物理研究所 | Superconducting magnet system |
| CN104697739B (en) * | 2015-03-16 | 2017-03-15 | 上海交通大学 | Cryogen flow resistance and Temperature Distribution test device in adiabatic corrugated tube |
| CN107421825A (en) * | 2017-05-11 | 2017-12-01 | 兰州大学 | A kind of nano impress device based on GM refrigeration machines |
| CN112038034A (en) * | 2020-09-03 | 2020-12-04 | 中国科学院合肥物质科学研究院 | Small-size two vacuum cavity low temperature superconducting magnet dewar |
| CN114527418A (en) * | 2022-01-24 | 2022-05-24 | 中国科学院合肥物质科学研究院 | Superconducting magnet operation monitoring system and design method |
| CN115050534A (en) * | 2022-05-30 | 2022-09-13 | 上海联影医疗科技股份有限公司 | Thermostat and precooling method of superconducting magnet |
-
2023
- 2023-04-12 CN CN202310384945.7A patent/CN116092768B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000148254A (en) * | 1998-11-13 | 2000-05-26 | Ckd Corp | Vacuum pressure controller |
| JP2011134336A (en) * | 2011-01-24 | 2011-07-07 | Ckd Corp | Vacuum pressure control system and vacuum pressure control program |
| CN113607347A (en) * | 2021-07-23 | 2021-11-05 | 山东非金属材料研究所 | Method and device for detecting leakage of vacuum hot-press molding composite armor material |
| CN115060761A (en) * | 2022-08-17 | 2022-09-16 | 山东美生热能科技有限公司 | Heat-insulating oil casing vacuum extraction supervisory control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116092768A (en) | 2023-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3676543B1 (en) | A fault-tolerant cryogenically cooled system | |
| CN116092768B (en) | Low-temperature magnet Dewar device and vacuum degree control method | |
| US6967480B2 (en) | Superconducting magnet for MRI | |
| CN103256767B (en) | Method for controlling evaporating temperature of water-side heat exchanger of air conditioner and air conditioner | |
| WO2019105427A1 (en) | Refrigeration and freezing device and oxygen removal control method thereof | |
| CN108514066B (en) | Refrigerating and freezing device | |
| WO2021221781A3 (en) | Water electrolysis and cryogenic liquefaction system | |
| CN116294062A (en) | Detection method and detection device for air conditioner refrigerant leakage and air conditioner | |
| GB2395545A (en) | Refrigerator and neck tube arrangement for cryostatic vessel | |
| CN109855375B (en) | Refrigerating and freezing device and deoxygenation control method thereof | |
| CN109442798B (en) | Refrigeration system, closed-loop refrigeration cycle and method for injecting refrigerant | |
| CN213891712U (en) | Printing roller cooling device for printing equipment | |
| CN103900304A (en) | Liquid storage device for refrigerating system | |
| CN109855349B (en) | Refrigerating and freezing device | |
| CN215490561U (en) | Food processing device and refrigeration equipment | |
| CN114719519A (en) | A kind of refrigerator | |
| CN217817637U (en) | Refrigerating box | |
| CN220892650U (en) | Air-cooled refrigerator | |
| CN219934361U (en) | Refrigerating apparatus | |
| CN219263944U (en) | Carbon dioxide storage tank | |
| CN214280647U (en) | Prefabricated storehouse of modularization of adjustable inside temperature | |
| CN217049584U (en) | Sex gas regulating fresh-keeping device | |
| CN220187187U (en) | Beverage cabinet with cold keeping function | |
| CN219843063U (en) | A electric core mount for long circulation lithium cell | |
| CN218102303U (en) | Gas insulation looped netowrk cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |