CN213958698U - Maintenance cooling system of superconducting magnet - Google Patents
Maintenance cooling system of superconducting magnet Download PDFInfo
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- CN213958698U CN213958698U CN202120301457.1U CN202120301457U CN213958698U CN 213958698 U CN213958698 U CN 213958698U CN 202120301457 U CN202120301457 U CN 202120301457U CN 213958698 U CN213958698 U CN 213958698U
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Abstract
A maintenance and cooling system for superconducting magnets comprises a Dewar tank unit (10), a connecting device (20), a plurality of compressors (30) and a heat dissipation assembly (40). The dewar unit comprises a dewar tank body (11), a plurality of cold heads (12), a heating device (13) and a circulating pump (14). The dewar tank is for storing helium gas and has an inlet and an outlet. The cold head is arranged in the Dewar flask tank body and can cool helium gas through a circulating refrigeration medium. The heating device is arranged in the Dewar flask tank body and can heat helium. The circulation pump is capable of driving helium into the inlet and out the outlet. The connecting device is connected with the dewar tank body and the tower of the superconducting magnet. The compressor is connected with the cold head and can circularly convey cooling medium into the cold head. The heat dissipation assembly comprises a plurality of heat exchangers, and the heat exchangers are correspondingly arranged on the compressor and can be connected with circulating cooling water. The maintenance cooling system has low maintenance cost and short maintenance period.
Description
Technical Field
The utility model relates to a maintenance cooling system, especially a maintenance cooling system for superconducting magnet.
Background
The superconducting magnet is widely applied to an MRI system, and only when one superconducting magnet is cooled to a certain critical temperature, the superconducting magnet can reach a superconducting state. In the maintenance process of the superconducting magnet, liquid nitrogen is required to be used for low-temperature precooling, and then the superconducting magnet is gradually vacuumized to be transited to the low-temperature level of the liquid helium. The traditional cooling method needs to consume a large amount of liquid helium and liquid nitrogen, the maintenance cost is high, and the maintenance period is long.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a maintenance cooling system of superconducting magnet, cost of maintenance that can superconducting magnet is more end, and maintenance cycle is shorter.
The utility model provides a maintenance cooling system of superconducting magnet, including a dewar jar unit, a connecting device, several compressor and a radiator unit. The dewar unit comprises a dewar tank body, a plurality of cold heads, a heating device and a circulating pump. The dewar tank is for storing helium gas and has an inlet and an outlet. The plurality of cold heads are arranged in the Dewar tank body, and each cold head can cool helium in the Dewar tank body through a circulating refrigeration medium. The heating device is arranged in the Dewar flask tank body and can heat helium in the Dewar flask tank body. The circulation pump can drive helium from the inlet into the dewar tank and out the outlet. The connecting device is connected with the inlet and the outlet of the Dewar tank body through pipelines, and the connecting device can also be fixed on a tower of the superconducting magnet to connect the Dewar tank body with an internal cooling passage of the superconducting magnet. The plurality of compressors are correspondingly connected with the plurality of cold heads, and each compressor can circularly convey cooling media into each cold head. The heat dissipation assembly comprises a plurality of heat exchangers, the heat exchangers are correspondingly arranged on the compressors, and the heat exchangers can be connected with circulating cooling water to cool the compressors.
The utility model provides a maintenance cooling system of superconducting magnet, the dewar jar body of dewar jar unit pass through connecting device and are connected with the inside cooling route of superconducting magnet, borrow by the circulating pump to provide endless helium to superconducting magnet. According to the maintenance requirement, the compressor can be matched with the cold head to cool helium in the Dewar flask tank body, and then the superconducting magnet is cooled. The heating device of the Dewar flask unit can also heat helium in the Dewar flask tank body, and then the superconducting magnet is heated and recovered to normal temperature. The utility model provides a maintenance cooling system of superconducting magnet can cyclic utilization helium, makes the cost of maintenance of superconducting magnet more end. Meanwhile, the process of cooling and heating the superconducting magnet by using the maintenance cooling system is simple, and the time is saved, so that the maintenance period of the superconducting magnet is shorter.
In yet another exemplary embodiment of a service cooling system for a superconducting magnet, the dewar unit further comprises a pressure sensor, a temperature sensor and a dewar controller. The pressure sensor is capable of measuring the pressure of the helium gas within the dewar tank. The temperature sensor is capable of measuring the temperature of the helium gas within the dewar tank. The dewar controller is in signal connection with the pressure sensor, the temperature sensor, the plurality of compressors and the heating device, and is configured to input a control parameter and automatically control the compressors and the heating device according to the control parameter and the pressure and temperature of the helium gas in the dewar tank. Therefore, automatic control can be realized, and the accurate and stable parameters of the helium in the Dewar tank body are ensured.
In yet another exemplary embodiment of a service cooling system for a superconducting magnet, the service cooling system further comprises a communication device and a control unit. The communication device can be in signal connection with a control system and a sensor of the superconducting magnet and acquire the running state information of the superconducting magnet. The control unit is in signal connection with the communication device and the dewar controller, and the control unit is configured to be capable of automatically inputting control parameters to the dewar controller according to the operating state information of the superconducting magnet. Therefore, the parameters of the helium in the Dewar tank body can be automatically controlled according to the running state of the superconducting magnet in the maintenance process.
In another exemplary embodiment of a service cooling system for a superconducting magnet, the control unit comprises a human-machine interaction display screen capable of displaying operating status information of the superconducting magnet, the dewar unit and the compressor, the human-machine interaction display screen further being used for manually inputting control instructions for controlling the dewar unit and the compressor. Therefore, maintenance personnel can monitor each device conveniently and perform manual control.
In another exemplary embodiment of the repair cooling system for a superconducting magnet, the repair cooling system further includes a plurality of trolleys that are movable on the ground, and the dewar unit, the plurality of compressors, and the control unit are correspondingly disposed on the plurality of trolleys. Therefore, maintenance personnel can conveniently move the equipment on site to adapt to the complex environment of the maintenance site.
In another exemplary embodiment of the maintenance and cooling system for the superconducting magnet, the heat dissipation assembly further includes two water distributors, one water distributor can be connected to the water outlets of the water-cooling heat dissipation unit of the superconducting magnet and the water inlets of the plurality of heat exchangers through a pipeline, and the other water distributor can be connected to the water inlets of the water-cooling heat dissipation unit of the superconducting magnet and the water outlets of the plurality of heat exchangers through a pipeline. Therefore, the heat exchanger is conveniently connected with the water-cooling heat dissipation unit of the superconducting magnet.
In another exemplary embodiment of a service cooling system for a superconducting magnet, the heat sink assembly further comprises a booster pump capable of increasing water pressure entering a water separator connected to water inlets of the plurality of heat exchangers. Borrow this can control the pressure of intaking of several heat exchangers in a flexible way, reduced the requirement to the water-cooling heat dissipation unit of maintenance scene, improved the suitability.
In another exemplary embodiment of a service cooling system for a superconducting magnet, the connection device comprises a first flange and a plurality of second flanges. The first flange is connected with an inlet and an outlet of the Dewar tank body through a pipeline, and the first flange can be hermetically fixed on a tower table of the superconducting magnet through bolts. The diameters of the second flanges are different and larger than that of the first flange, each second flange can be hermetically fixed on pylons of superconducting magnets of different sizes through bolts, and the first flange can also be hermetically fixed on the second flange through bolts. The maintenance cooling system can be flexibly mounted on towers with different sizes through the structure.
In another exemplary embodiment of a service cooling system for a superconducting magnet, the compressor uses helium gas as a cooling medium. Thereby facilitating field operations.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
Fig. 1 is a schematic configuration diagram for explaining an exemplary embodiment of a repair cooling system for a superconducting magnet.
Fig. 2 is a reference diagram for explaining a use state of the connecting device.
Fig. 3 is a reference diagram for explaining another use state of the connecting device.
Fig. 4 is a schematic configuration diagram for explaining another exemplary embodiment of a repair cooling system for a superconducting magnet.
FIG. 5 is a schematic view of a partial configuration of a service cooling system.
Description of the reference symbols
10 Dewar flask unit
11 Dewar jar body
12 cold head
13 heating device
14 circulation pump
15 pressure sensor
16 temperature sensor
17 Dewar tank controller
20 connecting device
21 first flange
22 second flange
30 compressor
40 heat sink assembly
42 heat exchanger
44 water knockout vessel
46 blower pump
50 communication device
60 control unit
62 human-computer interaction display screen
70 trolley
80 superconducting magnet
82 tower
84 water-cooling heat dissipation unit
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings, wherein the same reference numerals in the drawings denote the same or similar components.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
In this document, "first", "second", etc. do not mean their importance or order, etc., but merely mean that they are distinguished from each other so as to facilitate the description of the document.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product.
Fig. 1 is a schematic configuration diagram for explaining an exemplary embodiment of a repair cooling system for a superconducting magnet. Referring to fig. 1, a repair cooling system for a superconducting magnet includes a dewar unit 10, a connection device 20, four compressors 30, and a heat sink assembly 40.
The dewar unit 10 comprises a dewar tank 11, four cold heads 12, a heating device 13 and a circulation pump 14. The dewar tank 11 is for storing helium gas, the dewar tank 11 having an inlet and an outlet. Four cold heads 12 are provided in the dewar tank 11, and each cold head 12 can cool the helium gas in the dewar tank 11 by the circulating refrigerant. The heating device 13 may be an electrical heating blade disposed within the dewar tank 11 and capable of heating helium gas within the dewar tank 11. The circulation pump 14 is capable of driving helium from the inlet into the dewar tank 11 and from the outlet, and in cooperation with the cold head 12 and the heating means 13, the dewar unit 10 is capable of cyclically providing helium at different temperatures.
The connecting device 20 connects the inlet and outlet of the dewar tank 11 by a pipe, and the connecting device 20 can be further fixed to a turret 82 of the superconducting magnet 80 to connect the dewar tank 11 with the internal cooling passage of the superconducting magnet 80, whereby helium gas can circulate between the dewar tank 11 and the internal cooling passage of the superconducting magnet 80 to transfer the cold or heat in the dewar tank 11 to the superconducting magnet 80.
The four compressors 30 are connected to the four cold heads 12 in a one-to-one correspondence, and each compressor 30 can circulate and convey a cooling medium into each cold head 12 and cool helium gas in the dewar tank 11. In the illustrated embodiment, the compressor 30 uses helium gas as the cooling medium, which is the same cooling medium used for the superconducting magnet 80, for ease of field access. The heat dissipation assembly 40 includes four heat exchangers 42, and the four heat exchangers 42 are disposed at heat generating positions in the four compressors 30 in a one-to-one correspondence. The heat exchangers 42 are connected to circulate cooling water to cool the compressors 30, thereby preventing thermal protection of the compressors 30 and enabling the compressors 30 to operate continuously and stably.
Although the number of the cold heads 12, the compressors 30, and the heat exchangers 42 is four and the number of the heating devices 13 is one in the present exemplary embodiment, the present exemplary embodiment is not limited thereto, and the number of the cold heads 12, the compressors 30, the heat exchangers 42, and the heating devices 13 may be adjusted according to actual needs in other exemplary embodiments.
The utility model provides a maintenance cooling system of superconducting magnet, dewar jar body 11 of dewar jar unit 10 passes through connecting device 20 and is connected with superconducting magnet 80's inside cooling route, borrows by circulating pump 14 to provide endless helium to superconducting magnet 80. The compressor 30 can cooperate with the cold head 12 to cool the helium gas in the dewar tank 11 and thus the superconducting magnet 80, as required for maintenance. The heating device 13 of the dewar unit 10 can heat the helium gas in the dewar tank 11, and further, the superconducting magnet 80 is heated to the normal temperature. The utility model provides a maintenance cooling system of superconducting magnet can cyclic utilization helium, makes the cost of maintenance of superconducting magnet more end. Meanwhile, the process of cooling and heating the superconducting magnet 80 by using the maintenance cooling system is simple, and the time is saved, so that the maintenance period of the superconducting magnet is shorter.
In an exemplary embodiment, referring to fig. 1, the heat dissipating assembly 40 further includes two water splitters 44, one water splitter 44 being capable of connecting water outlets of the water-cooled heat dissipating unit 84 of the superconducting magnet 80 and water inlets of the four heat exchangers 42 through pipes, and the other water splitter 44 being capable of connecting water inlets of the water-cooled heat dissipating unit 84 of the superconducting magnet 80 and water outlets of the four heat exchangers 42 through pipes. Thereby facilitating the connection of the heat exchanger 42 with the water-cooled heat dissipating unit 84 of the superconducting magnet 80.
In the illustrated embodiment, referring to fig. 1, the heat dissipation assembly 40 further includes a booster pump 46 capable of increasing the water pressure entering the water separator 44 connected to the water inlets of the four heat exchangers 42. Therefore, the water inlet pressure of the four heat exchangers 42 can be flexibly controlled, the requirement on the water-cooling heat dissipation unit 84 in the maintenance site is reduced, and the applicability is improved.
Fig. 2 is a reference diagram for explaining a use state of the connecting device. Fig. 3 is a reference diagram for explaining another use state of the connecting device. Referring to fig. 2 and 3, the connecting device 20 includes a first flange 21 and a plurality of second flanges 22. The first flange 21 connects the inlet and outlet of the dewar tank 11 by a pipe. Referring to fig. 2, the first flange 21 can be fixed to a tower 82 of the superconducting magnet 80 by bolts, and a sealing ring may be added between the first flange 21 and the tower 82 to enhance sealing. Referring to fig. 3, only one second flange 22 is shown, and several second flanges 22 have different diameters and are all larger than the diameter of the first flange 21. The second flange 22 can be fixed to a tower 82 of superconducting magnets 80 of different sizes by bolts and enhanced in sealing by a sealing ring, and the first flange 21 can also be fixed to the second flange 22 by bolts and enhanced in sealing by a sealing ring. When different types of superconducting magnets 80 are repaired, the repair cooling system can be flexibly mounted on towers 82 with different sizes by selecting different second flanges 22.
Fig. 4 is a schematic configuration diagram for explaining another exemplary embodiment of a repair cooling system for a superconducting magnet. Referring to fig. 4, the service cooling system of fig. 4 is the same as or similar to the service cooling system of fig. 1 and will not be described again except that the dewar unit 10 further includes a pressure sensor 15, a temperature sensor 16 and a dewar controller 17. Pressure sensor 15 is capable of measuring the pressure of the helium gas within dewar tank 11. The temperature sensor 16 is capable of measuring the temperature of the helium gas within the dewar tank 11. The dewar controller 17 is in signal connection with the pressure sensor 15, the temperature sensor 16, the four compressors 30 and the heating device 13, and the dewar controller 17 is capable of receiving data measured by the pressure sensor 15 and the temperature sensor 16 and operational status data of the compressors 30 and the heating device 13, and the dewar controller 17 is also capable of controlling the compressors 30 and the heating device 13. The dewar controller 17 is configured to be able to input a control parameter and automatically control the compressor 30 and the heating means 13 according to the control parameter and the pressure and temperature of the helium gas inside the dewar tank 11. Therefore, automatic control can be realized, and the accurate and stable parameter of the helium in the Dewar tank body 11 is ensured
In an exemplary embodiment, referring to fig. 4, the service cooling system further includes a communication device 50 and a control unit 60. The communication device 50 can signal the control system and the sensors of the superconducting magnet 80 and acquire the operating state information of the superconducting magnet 80. The control unit 60 is in signal connection with the communication device 50 and the dewar controller 17, and the control unit 60 is configured to be able to automatically input control parameters to the dewar controller 17 according to the operating state information of the superconducting magnet 80. Therefore, the parameters such as the temperature and the pressure of the helium gas in the Dewar tank body 11 can be automatically controlled according to the running state of the superconducting magnet 80 in the maintenance process.
FIG. 5 is a schematic view of a partial configuration of a service cooling system. Referring to fig. 5, in the exemplary embodiment, control unit 60 includes a human-machine interaction display screen 62, human-machine interaction display screen 62 is capable of displaying operating status information of superconducting magnet 80, dewar unit 10 and compressor 30, and human-machine interaction display screen 62 is also used for manually inputting control instructions for controlling dewar unit 10 and compressor 30. Therefore, maintenance personnel can monitor each device conveniently and perform manual control.
In an exemplary embodiment, referring to fig. 5, the service cooling system further includes a plurality of trolleys 70 that can move on the ground, and in fig. 5, taking the control unit 60 as an example, the dewar unit 10, the four compressors 30 and the control unit 60 are disposed on the plurality of trolleys 70 in a one-to-one correspondence. The maintenance personnel can conveniently move each device on site, thereby adapting to the complex environment of the maintenance site.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above list of details is only for the practical examples of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of the features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.
Claims (9)
1. A system for servicing and cooling a superconducting magnet, comprising:
a dewar unit (10) comprising:
a dewar tank (11) for storing helium gas, said dewar tank (11) having an inlet and an outlet,
a plurality of cold heads (12), wherein the plurality of cold heads (12) are arranged in the Dewar tank body (11), each cold head (12) can cool helium in the Dewar tank body (11) through a circulating refrigeration medium,
a heating device (13) disposed within said dewar tank (11) and capable of heating helium gas within said dewar tank (11),
a circulation pump (14) capable of driving helium from said inlet into said dewar tank (11) and out of said outlet,
a connection means (20) connecting said inlet and said outlet of said dewar tank (11) by tubing, said connection means (20) further being capable of being secured to a turret of a superconducting magnet, connecting said dewar tank (11) with an internal cooling passage of said superconducting magnet;
a plurality of compressors (30), wherein the plurality of compressors (30) are correspondingly connected with the plurality of cold heads (12), each compressor (30) can circularly convey a cooling medium into each cold head (12),
and the heat dissipation assembly (40) comprises a plurality of heat exchangers (42), the heat exchangers (42) are correspondingly arranged on the compressors (30), and each heat exchanger (42) can be connected with circulating cooling water to cool each compressor (30).
2. A service cooling system for a superconducting magnet according to claim 1, wherein the dewar unit (10) further comprises:
a pressure sensor (15) capable of measuring the pressure of helium within said dewar vessel (11);
a temperature sensor (16) capable of measuring the temperature of helium gas within said dewar vessel (11); and
a dewar controller (17) signally connected to said pressure sensor (15), said temperature sensor (16), said plurality of compressors (30) and said heating means (13), said dewar controller (17) being configured to enable input of a control parameter and automatic control of said compressors (30) and said heating means (13) based on said control parameter and pressure and temperature of helium within said dewar tank (11).
3. A service cooling system for a superconducting magnet as claimed in claim 2, wherein the service cooling system further comprises: a communication device (50) capable of signal connecting the control system and the sensor of the superconducting magnet and acquiring the running state information of the superconducting magnet;
a control unit (60) in signal communication with said communication device (50) and said dewar controller (17), said control unit (60) configured to automatically input said control parameters to said dewar controller (17) based on operating state information of said superconducting magnet.
4. A service cooling system for a superconducting magnet according to claim 3, wherein the control unit (60) comprises a human machine interaction display screen (62), the human machine interaction display screen (62) being capable of displaying operating status information of the superconducting magnet, the dewar unit (10) and the compressor (30), the human machine interaction display screen (62) being further used for manually inputting control instructions for controlling the dewar unit (10) and the compressor (30).
5. A service cooling system for a superconducting magnet according to claim 3, further comprising a plurality of trolleys (70) movable on the ground, wherein the dewar unit (10), the plurality of compressors (30) and the control unit (60) are correspondingly provided to the plurality of trolleys (70).
6. A service cooling system for a superconducting magnet according to claim 1, wherein the heat dissipating assembly (40) further comprises two water splitters (44), one of the water splitters (44) being capable of connecting by pipe an outlet of the water cooled heat dissipating unit of the superconducting magnet and an inlet of the plurality of heat exchangers (42), the other of the water splitters (44) being capable of connecting by pipe an inlet of the water cooled heat dissipating unit of the superconducting magnet and an outlet of the plurality of heat exchangers (42).
7. A service cooling system for a superconducting magnet according to claim 6, wherein the heat sink assembly (40) further comprises a booster pump (46) capable of increasing the water pressure entering a water separator (44) connected to the water inlets of the plurality of heat exchangers (42).
8. A service cooling system for a superconducting magnet according to claim 1, wherein the connection means (20) comprises: a first flange (21) connecting said inlet and said outlet of said dewar vessel (11) by piping, said first flange (21) being capable of being sealingly secured to a turret of said superconducting magnet by bolts; and
a plurality of second flanges (22), the diameters of the plurality of second flanges (22) are different and are all larger than the diameter of the first flange (21), each second flange (22) can be hermetically fixed on towers of the superconducting magnets with different sizes through bolts, and the first flange (21) can also be hermetically fixed on the second flange (22) through bolts.
9. A service cooling system for a superconducting magnet according to claim 1, wherein the compressor (30) uses helium as a cooling medium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2021201208553 | 2021-01-15 | ||
| CN202120120855 | 2021-01-15 |
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| CN213958698U true CN213958698U (en) | 2021-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116031039A (en) * | 2023-03-22 | 2023-04-28 | 宁波健信超导科技股份有限公司 | Superconducting magnet heat transfer system |
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2021
- 2021-02-02 CN CN202120301457.1U patent/CN213958698U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116031039A (en) * | 2023-03-22 | 2023-04-28 | 宁波健信超导科技股份有限公司 | Superconducting magnet heat transfer system |
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