CN208170813U - A kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element - Google Patents
A kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element Download PDFInfo
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- CN208170813U CN208170813U CN201820526455.0U CN201820526455U CN208170813U CN 208170813 U CN208170813 U CN 208170813U CN 201820526455 U CN201820526455 U CN 201820526455U CN 208170813 U CN208170813 U CN 208170813U
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- liquid nitrogen
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Abstract
Disclosed by the utility model is a kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element, tank and superconductive element cooling tank is subcooled in liquid nitrogen including being connected separately with liquid nitrogen cabinet, there are distances between each tank body and tank level to form pressure space, it further include the vacuum control mechanism for connecting each pressure space, the liquid nitrogen supercooling tank and superconductive element cooling tank are arranged at random so that the liquid level of liquid nitrogen supercooling tank is higher than the liquid level of superconductive element cooling tank, and the cooling pot bottom connection of tank, superconductive element is subcooled to form siphon passage in liquid nitrogen；The liquid nitrogen supercooling tank is connected with circulation neon refrigeration mechanism；The utility model has the beneficial effects that：The utility model neon circularly cooling exchanges heat with liquid nitrogen, reduces energy consumption；In addition it is also provided with vacuum to maintain to protect with system overpressure, to maintain the pressure of liquid nitrogen supercooling and evaporation process to stablize；The utility model efficiently cools down superconductive element using overfreezing liquid nitrogen, has positive effect to the exploitation of China's high-temperature superconductor experimental rig.
Description
Technical field
The utility model relates to a kind of high-temperature superconductor system cooling technologies, more specifically say, are related to a kind of using normal pressure
The device of overfreezing liquid nitrogen cooling high-temperature superconducting element.
Background technique
Line loss is reduced, energy is saved, improves the efficiency of power transmission, is the main contents of power department design and operation work
One of, existing solution generally reduces electric energy loss using the method for improving voltage, and high temperature superconductor technology can make electric power
Energy-saving and emission-reduction are had positive effect by almost zero loss transmission；As high temperature superconductor technology is increasingly mature, future electrical energy transmission
The high-temperature superconductor epoch will be entered, the height of high-temperature superconductor research level is of great significance on strategic level for country；
High-temperature superconductor research needs entire high-temperature superconductor system being placed in 73K or less cryogenic environment, this maintains system to propose low temperature
High requirement.
Utility model content
In order to solve above-mentioned prior art problem, the utility model provides a kind of super using the cooling high temperature of normal pressure overfreezing liquid nitrogen
The device of guiding element.
To achieve the goals above, the utility model is achieved through the following technical solutions：
A kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element, the liquid nitrogen including being connected separately with liquid nitrogen cabinet
Tank and superconductive element cooling tank is subcooled, there are distances between each tank body and tank level to form pressure space, further includes connecting
Meet the vacuum control mechanism of each pressure space；The liquid nitrogen supercooling tank and superconductive element cooling tank are arranged at random so that liquid nitrogen mistake
The liquid level of cold tank is higher than the liquid level of superconductive element cooling tank, and the cooling pot bottom connection of tank, superconductive element is subcooled to form rainbow in liquid nitrogen
Inhale channel；The liquid nitrogen supercooling tank, which is connected with, follows bad neon refrigeration mechanism, the air pressure in the pressure space of the liquid nitrogen supercooling tank
For negative pressure.
Preferably, the loop for following bad neon refrigeration mechanism and being perfused with neon for one, the loop one
Part is pierced by liquid nitrogen supercooling tank setting, and another part is set in liquid nitrogen supercooling tank；The closing for being pierced by liquid nitrogen supercooling tank part is returned
Road, which is sequentially connected, is provided with neon compressor, main heat exchanger, neon expanding machine；It submerges and sets below the liquid level of the liquid nitrogen supercooling tank
It is equipped with heat exchange capillary.
Preferably, the neon compressor includes the sub- compressor of level-one neon being sequentially connected in series, the sub- compressor of second level neon；
The neon expanding machine includes the sub- expanding machine of level-one neon being connected in parallel with heat exchanger, the sub- expanding machine of second level neon.
Preferably, each pressure space is respectively connected at least one vacuum pumping port, and the vacuum takes out another lateral line
On be connected with vacuum resistance rule in turn, vacuum degree maintains solenoid valve, the pipeline that each vacuum degree maintains solenoid valve to extend connects jointly
It is connected to vacuum pump；The liquid nitrogen supercooling tank and liquid nitrogen cabinet are communicated with liquid nitrogen supplement tank.
Preferably, the sub- compressor of level-one neon connects the sub- expanding machine of level-one neon, second level neon by primary motor
Sub- compressor connects the sub- expanding machine of second level neon by secondary motor；The parameter-embedded adjusting machine of the primary motor, secondary motor
Structure.
Preferably, the DCS configuration base controlled system connects sub-control system by RS485 local communication.
Beneficial effect：A kind of method and device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting system of the utility model,
Freezed using circulation neon compression-expansion, the cooling raw material liquid nitrogen of tank is subcooled by liquid nitrogen, by recycling neon compression-expansion parameter
Adjusting, the liquid nitrogen of available Different hypothermia sequence；Dynamical elevation between tank and superconductive element cooling tank is subcooled using liquid nitrogen
Different and the two liquid nitrogen density variation generates siphonage, and overfreezing liquid nitrogen is conveyed into cooling superconductive element of superconductive element cooling tank etc.
Key equipment；The utility model is provided with vacuum and maintains to protect with system overpressure, to maintain the pressure of liquid nitrogen supercooling and evaporation process
Power is stablized；The utility model efficiently cools down superconductive element using overfreezing liquid nitrogen, has to the exploitation of China's high-temperature superconductor experimental rig
There is positive effect.
Detailed description of the invention
Fig. 1 is that the utility model constitutes schematic diagram.
Fig. 2 is that the utility model recycles neon coolant system structural schematic diagram.
Fig. 3 is that the utility model siphon principle conveys overfreezing liquid nitrogen signal.
Fig. 4 is the utility model electric part structural block diagram.
Fig. 5 is the cooling superconductive element device work flow diagram of the utility model liquid nitrogen.
It is marked in figure as follows：
Tank, 2- relief post, 3- liquid nitrogen supercooling tank liquid nitrogen replenishment control valve, 4- vacuum resistance rule, 5- neon is subcooled in 1- liquid nitrogen
Expanding machine, 6- main heat exchanger, 7- neon compressor, 8- vacuum degree maintain solenoid valve, 10- liquid nitrogen supercooling tank and superconductive element cooling
Tank communicating valve, 11- liquid nitrogen supplement tank, 12- superconductive element cooling tank top nitrogen emptying one-way valve, 13- superconductive element cooling tank
Top nitrogen shut-off valve；14- superconductive element cooling tank, 15- vacuum pump, 16- vacuum degree control valve, 17- normal pressure nitrogen cylinder,
18- normal pressure nitrogen transfer valve, 19- superconductive element cooling tank liquid nitrogen exhaust-valve, 20- liquid nitrogen cabinet, 21- liquid nitrogen cabinet liquid nitrogen replenishment valve,
23-DCS configuration base controlled system, 24- connection column, 27- heat exchange capillary, 28- primary motor, the expansion of 29- second level neon
Machine, the sub- compressor of 30- second level neon, the sub- expanding machine of 31- level-one neon, 32- are compressed by secondary motor, 34- level-one neon
Machine
Specific embodiment
Below in conjunction with Figure of description, the utility model is described in further detail, but the utility model be not limited to
Lower embodiment.
According to a kind of Fig. 1 to device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting system shown in fig. 5, including respectively
It is connected with the liquid nitrogen supercooling tank 1 and superconductive element cooling tank 14 of liquid nitrogen cabinet 20, there are distances between each tank body and tank level
To form pressure space, pressure space is used to control the pressure equilibrium between nitrogen and liquid nitrogen, and control pressure space pressure can make
Liquid nitrogen conveys in certain direction, and each pressure space is also connected with the vacuum control mechanism of control vacuum degree,
The liquid nitrogen supercooling tank 1 and superconductive element cooling tank 14 are arranged at random so that the liquid level of liquid nitrogen supercooling tank 1 is higher than super
The liquid level of component cooling tank 14 is led, the cooling pot bottom connection of liquid nitrogen supercooling tank, superconductive element is to form siphon passage, liquid nitrogen supercooling
Pot bottom 1 and 14 bottom connection of superconductive element cooling tank generate siphonic effect by gravitational potential between the two and density variation,
Normal pressure overfreezing liquid nitrogen is conveyed into superconductive element cooling tank 14；
The liquid nitrogen supercooling tank 1, which is connected with, follows bad neon refrigeration mechanism, the gas in the pressure space of the liquid nitrogen supercooling tank 1
Pressure is negative pressure.
The utility model liquid nitrogen is subcooled tank 1 and the low temperature liquid nitrogen after supercooling is input to superconduction portion by the siphon passage formed
Part cooling tank 14, neon circular refrigerating mechanism are the loop for being perfused with neon, and loop includes neon compressor
7, main heat exchanger 6, neon expanding machine 5, heat exchange capillary 27；Neon compressor 7, main heat exchanger 6, neon expanding machine 5 are in liquid nitrogen
It is subcooled on 1 liquid level of tank, is connected to heat exchange with liquid nitrogen supercooling tank 1 by being immersed in the heat exchange capillary 27 that liquid nitrogen is subcooled in tank 1.
As advanced optimizing, neon compressor 7 includes the sub- compressor 34 of level-one neon being sequentially connected in series, second level neon
Compressor 30；Neon expanding machine 5 includes the sub- expanding machine 31 of level-one neon, the sub- expanding machine of second level neon being connected in parallel with heat exchanger
29；After room temperature neon passes sequentially through the sub- compression of compressor 30 of the sub- compressor 34 of level-one neon, second level neon, changed by main heat exchanger
Neon after heat exchange is assigned to the sub- expanding machine 31 of level-one neon, the sub- expanding machine 29 of second level neon by heat, by primary motor 28,
The different parameters that secondary motor 32 is set, the sub- compressor 34 of level-one neon, the sub- compressor 30 of second level neon obtain Different hypothermia sequence
The neon of column.
As advanced optimizing, each pressure space is respectively connected at least one vacuum pumping port, another side pipe of vacuum pumping port
Road is connected with vacuum resistance rule 4 in turn, vacuum degree maintains solenoid valve 8, and the pipeline that each vacuum degree maintains solenoid valve 8 to extend is total
It is same to be connected with vacuum pump 15；The liquid nitrogen supercooling tank 1 and liquid nitrogen cabinet 20 are communicated with liquid nitrogen supplement tank 11；The liquid of the utility model
Tank 1, superconductive element cooling tank 14, liquid nitrogen cabinet 20,11 top of liquid nitrogen supplement tank is subcooled in the presence of a pressure space in nitrogen, and pressure is empty
Interior pressure passes through vacuum resistance rule 4, vacuum degree maintains solenoid valve, vacuum pump 15 to adjust the vacuum in pressure space jointly
Degree；
System pressure is stablized in Fig. 1 arranges by superconductive element cooling tank nitrogen shut-off valve 13, superconductive element cooling tank nitrogen
Empty check valve 12, logical fluid column 24, normal pressure nitrogen transfer valve 18, superconductive element cooling tank liquid nitrogen exhaust-valve realize 19；When liquid nitrogen mistake
When cold 1 top pressure superpressure of tank, liquid nitrogen supercooling tank liquid nitrogen is transmitted back to by liquid nitrogen cabinet 20 by relief post 2；Similarly, work as superconductive element
When 14 top superpressure of cooling tank, liquid nitrogen is transmitted back to by liquid nitrogen cabinet by logical fluid column 24 and superconductive element cooling tank liquid nitrogen exhaust-valve 19
20。
Referring to fig. 4, the utility model by DCS configuration base controlled system control neon compressor 7, neon expanding machine 5,
Vacuum resistance rule 4,15 start and stop of vacuum pump, vacuum degree maintain solenoid valve 8.Tank 1, superconduction portion is subcooled in 4 feedback liquid nitrogen of vacuum resistance rule
Tank 1, superconductive element cooling tank 14 is subcooled very according to the liquid nitrogen of feedback in 14 vacuum degree of part cooling tank, DCS configuration base controlled system
Reciprocal of duty cycle, control vacuum solenoid 8 are opened and closed.
A method of using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting system, step is：
Step 1: investigation equipment, pipes between devices are abnormal；
Step 2: carrying out self-test to the system including vacuum control mechanism；
Step 3: nitrogen purge pipe, displaced air is simultaneously vacuumized to reach predetermined vacuum after System self-test is without exception
Degree；
Step 4: circulation step 33 to 5 times；
Step 5: being filled with neon after the completion of system starting preparation to circulation neon system, being then turned on neon compression
Machine 5 opens 7 swell refrigeration of neon expanding machine after waiting compressor delivery pressures up to standard；Raw material is opened after circulation neon cooling activation
Liquid nitrogen pump, the transferring raw material liquid nitrogen into liquid nitrogen supercooling tank 1；Vacuum degree maintains solenoid valve 8 to start to work simultaneously, passes through vacuum resistance
4 control vacuum degree of rule maintains the start and stop of solenoid valve 8, to maintain liquid nitrogen that 1 top pressure of tank is subcooled.
Step 6: liquid nitrogen from siphon passage from liquid nitrogen supercooling tank enter superconductive element cooling tank to superconductive element carry out it is cold
But；
Step 7: normal pressure overfreezing liquid nitrogen cools down superconductive element.It is pushed up by 4 measurement superconductive element cooling tank 14 of vacuum resistance rule
Portion's pressure, and control vacuum degree and solenoid valve 8 is maintained to open and close；
Step 8: overpressure protection is arranged in system operation, when tank 1,14 top of superconductive element cooling tank is subcooled in liquid nitrogen
Liquid nitrogen can be transmitted back to material liquid nitrogen supply tank by relief post 2, logical fluid column 24, to maintain supercooling tank top pressure by nitrogen overpressure
Power is stablized；
Step 9: circulation step seven, step 8 are so that superconductive element cooling tank temperature maintains 65K until superconductive element
Complete cooling
A kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element of the utility model is compressed using circulation neon
The cooling raw material liquid nitrogen of tank is subcooled by liquid nitrogen in swell refrigeration, by recycling the adjusting of neon compression-expansion parameter, it is available not
With the liquid nitrogen of low temperature sequence.It is close that gravitational potential difference and the two liquid nitrogen between tank 1 and superconductive element cooling tank 14 is subcooled using liquid nitrogen
It spends difference and generates siphonage, overfreezing liquid nitrogen is conveyed into the key equipments such as the cooling superconductive element of superconductive element cooling tank；This reality
It maintains to protect with system overpressure with the novel vacuum that is provided with, to maintain the pressure of liquid nitrogen supercooling and evaporation process to stablize；This is practical
It is novel efficiently to cool down superconductive element using overfreezing liquid nitrogen, there is positive effect to the exploitation of China's high-temperature superconductor experimental rig
Finally it should be noted that the utility model is not limited to above embodiments, there can also be many variations.This field
The those of ordinary skill's all deformations that directly can export or associate from content disclosed by the utility model, be considered as
The protection scope of the utility model.
Claims (5)
1. a kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element, the liquid nitrogen mistake including being connected separately with liquid nitrogen cabinet
Cold tank and superconductive element cooling tank, there are distances between each tank body and tank level to form pressure space, further includes connection
The vacuum control mechanism of each pressure space, it is characterised in that：
The liquid nitrogen supercooling tank is arranged at random with superconductive element cooling tank so that the liquid level of liquid nitrogen supercooling tank is cold higher than superconductive element
But the cooling pot bottom connection of tank, superconductive element is subcooled to form siphon passage in the liquid level of tank, liquid nitrogen；
The liquid nitrogen supercooling tank is connected with circulation neon refrigeration mechanism, and the air pressure in the pressure space of the liquid nitrogen supercooling tank is negative
Pressure.
2. a kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element according to claim 1, feature exist
In：The circulation neon refrigeration mechanism is the loop for being perfused with neon, and described loop a part is pierced by liquid nitrogen
Tank setting is subcooled, another part is set in liquid nitrogen supercooling tank；The loop for being pierced by liquid nitrogen supercooling tank part, which is sequentially connected, to be set
It is equipped with neon compressor, main heat exchanger, neon expanding machine；Submergence below the liquid level of the liquid nitrogen supercooling tank is provided with heat exchange capillary
Pipe.
3. a kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element according to claim 2, feature exist
In：The neon compressor includes the sub- compressor of level-one neon being sequentially connected in series, the sub- compressor of second level neon；The neon expansion
Machine includes the sub- expanding machine of level-one neon being connected in parallel with heat exchanger, the sub- expanding machine of second level neon.
4. a kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element according to claim 1-3,
It is characterized in that：Each pressure space is respectively connected at least one vacuum pumping port, the vacuum take out on another lateral line according to
Secondary to be connected with vacuum resistance rule, vacuum degree maintenance solenoid valve, the pipeline that each vacuum degree maintains solenoid valve to extend is connected with jointly
Vacuum pump；The liquid nitrogen supercooling tank and liquid nitrogen cabinet are communicated with liquid nitrogen supplement tank.
5. a kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element according to claim 3, feature exist
In：The sub- compressor of level-one neon connects the sub- expanding machine of level-one neon by primary motor, the sub- compressor of second level neon passes through
Secondary motor connects the sub- expanding machine of second level neon；The parameter-embedded regulating mechanism of the primary motor, secondary motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820526455.0U CN208170813U (en) | 2018-04-13 | 2018-04-13 | A kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820526455.0U CN208170813U (en) | 2018-04-13 | 2018-04-13 | A kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element |
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| CN208170813U true CN208170813U (en) | 2018-11-30 |
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| CN201820526455.0U Expired - Fee Related CN208170813U (en) | 2018-04-13 | 2018-04-13 | A kind of device using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562085A (en) * | 2018-04-13 | 2018-09-21 | 杭州杭氧股份有限公司 | A kind of device and method using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element |
-
2018
- 2018-04-13 CN CN201820526455.0U patent/CN208170813U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562085A (en) * | 2018-04-13 | 2018-09-21 | 杭州杭氧股份有限公司 | A kind of device and method using normal pressure overfreezing liquid nitrogen cooling high-temperature superconducting element |
| CN108562085B (en) * | 2018-04-13 | 2020-10-27 | 杭州制氧机集团股份有限公司 | Device and method for cooling high-temperature superconducting element by using normal-pressure super-cooling liquid nitrogen |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 310014 No. 799 Xiangfu Road, Qingshan Lake Street, Linan District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU HANGYANG Co.,Ltd. Address before: 310014 Hongyuan Daxia 716, No. 592 Zhongshan North Road, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU HANGYANG Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No.799, Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou oxygen generator group Co.,Ltd. Address before: No. 799, Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU HANGYANG Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181130 |