CN203877266U - Liquid nitrogen level monitoring system - Google Patents
Liquid nitrogen level monitoring system Download PDFInfo
- Publication number
- CN203877266U CN203877266U CN201420253251.6U CN201420253251U CN203877266U CN 203877266 U CN203877266 U CN 203877266U CN 201420253251 U CN201420253251 U CN 201420253251U CN 203877266 U CN203877266 U CN 203877266U
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- Prior art keywords
- liquid nitrogen
- liquid
- electromagnetic valve
- level
- container
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- Expired - Lifetime
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 242
- 239000007788 liquid Substances 0.000 title claims abstract description 150
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 121
- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 230000000007 visual effect Effects 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001802 infusion Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to the field of liquid nitrogen storage and utilization and discloses a liquid nitrogen level monitoring system. The liquid nitrogen level monitoring system comprises a liquid nitrogen container, a controller, a liquid inlet pipe and a liquid level sensor used for measuring liquid level of the liquid nitrogen container. The liquid inlet pipe is communicated with the liquid nitrogen container and provided with a thermal discharge pipe and a liquid inlet electromagnetic valve sequentially along the liquid inlet direction, the thermal discharge pipe is provided with a thermal discharge electromagnetic valve, and the liquid inlet electromagnetic valve, the thermal discharge electromagnetic valve and the liquid level sensor are all connected with the controller. When liquid nitrogen is replenished, high-temperature nitrogen in the liquid inlet pipe is discharged in advance through the thermal discharge pipe to prevent the nitrogen from being filled into the liquid nitrogen container, and consequently liquid nitrogen consumption is reduced, influences on the internal temperature of a tank are weakened, and sample storage safety can be guaranteed. In addition, when a cover is open, a demisting function can be realized by using the liquid inlet pipe for liquid adding, and after demisting, samples can be put in and taken out of the liquid nitrogen container more conveniently, and the visual field is clearer.
Description
Technical field
The utility model relates to liquid nitrogen and stores and use field, especially a kind of liquid nitrogen level monitoring system.
Background technology
Liquid nitrogen is the liquid form that nitrogen forms at low temperatures.Liquid nitrogen is of many uses, can be rapidly freezing and transporting food products, make Ice; Can preserve biological tissue; Carry out cryophysics research etc.Liquid nitrogen container is usually used in preserving biological sample, in liquid nitrogen biological container, liquid nitrogen level monitoring system generally can be set to complete level monitoring and automatic fluid filling function.Liquid nitrogen level monitoring system of the prior art is when fluid infusion, can the hot nitrogen in feed tube (having higher temperature with respect to liquid nitrogen) be directly filled with in liquid nitrogen container, not only can strengthen the consumption of liquid nitrogen, also can destroy the homogeneity of liquid nitrogen container internal temperature, affect the safety of stored samples.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of liquid nitrogen level monitoring system, and this system can reduce the impact on liquid nitrogen container internal temperature when supplementing liquid nitrogen, guarantees stored samples safety.
Liquid nitrogen level monitoring system disclosed in the utility model, comprise liquid nitrogen container, controller, feed tube and for measuring the level sensor of liquid nitrogen container liquid level, described feed tube is communicated with liquid nitrogen container, on described feed tube, along feed liquor direction, be disposed with hot driving pipe and liquid inlet electromagnetic valve, on described hot driving pipe, be provided with hot driving electromagnetic valve, described liquid inlet electromagnetic valve, hot driving electromagnetic valve and level sensor are all connected with controller.
Preferably, on described hot driving pipe, be also provided with hot driving temperature sensor, and hot driving temperature sensor is between feed tube and hot driving electromagnetic valve, described hot driving temperature sensor is connected with controller.
Preferably, described level sensor is differential pressure type level sensor, and described level sensor is communicated with respectively with the upper and lower two ends of liquid nitrogen container.
Preferably, described liquid nitrogen container top is provided with high-order temperature sensor, and described liquid nitrogen container bottom is provided with low level temperature sensor, and described high-order temperature sensor is all connected with controller with low level temperature sensor.
Preferably, on described controller, be connected with timer.
Preferably, this liquid nitrogen level monitoring system is provided with annunciator, and described annunciator is connected with controller.
The beneficial effects of the utility model are: first this liquid nitrogen level monitoring system can discharge the higher nitrogen of temperature in feed tube by hot driving pipe when supplementing liquid nitrogen, make it can not be charged in liquid nitrogen container, thereby reduce liquid nitrogen consumption, the impact of minimizing on tank interior temperature, guarantees stored samples safety.In addition, when uncapping, utilize feed tube liquid feeding also can realize defrosting function, after demist, more convenient to picking and placeing sample in liquid nitrogen container, the visual field is more clear.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Mark in figure: 1-liquid nitrogen container, 2-controller, 3-level sensor, 4-feed tube, 5-hot driving pipe, 6-liquid inlet electromagnetic valve, 7-hot driving electromagnetic valve, 8-hot driving temperature sensor, the high-order temperature sensor of 9-, 10-low level temperature sensor, 11-timer, 12-annunciator.
In figure, long and two-short dash line represents the annexation of signal transmission, the arrow on it represent side signal transmission to.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
As shown in Figure 1, the disclosed liquid nitrogen level monitoring system of the utility model, comprise liquid nitrogen container 1, controller 2, feed tube 4 and for measuring the level sensor 3 of liquid nitrogen container 1 liquid level, described feed tube 4 is communicated with liquid nitrogen container 1, on described feed tube 4, along feed liquor direction, be disposed with hot driving pipe 5 and liquid inlet electromagnetic valve 6, on described hot driving pipe 5, be provided with hot driving electromagnetic valve 7, described liquid inlet electromagnetic valve 6, hot driving electromagnetic valve 7 and level sensor 3 are all connected with controller 2.
On feed tube 4, along feed liquor direction, be disposed with hot driving pipe 5 and liquid inlet electromagnetic valve 6, that is to say the more close liquid nitrogen container 1 of liquid inlet electromagnetic valve 6 specific heat gargle pipe 5, so when hot driving pipe 5 discharge hot nitrogen, liquid inlet electromagnetic valve is closed and nitrogen in liquid nitrogen container 1 can not discharged.
The working process of the supplementary liquid nitrogen of this liquid nitrogen level monitoring system is as follows:
When the interior liquid level deficiency of the measured liquid nitrogen container 1 of level sensor 3, while reaching default fluid infusion point, first controller 2 is controlled feed tube 4 and is connected liquid nitrogen filling place, then hot driving electromagnetic valve 7 is opened, now liquid inlet electromagnetic valve 6 is in closed condition, the nitrogen that gasifies in feed tube 4 flows out from hot driving pipe 5, after a period of time, the nitrogen higher when temperature is discharged from, when in feed tube 4, temperature reaches enough low, controller 2 controls hot driving electromagnetic valve 7 and cuts out, liquid inlet electromagnetic valve 6 is opened, start to supplement liquid nitrogen for liquid nitrogen container 1, after level sensor 3 detects liquid nitrogen in container and reaches default height, controller 2 controls liquid inlet electromagnetic valve 6 and cuts out, liquid feeding completes.
Before being liquid nitrogen container 1 fluid infusion, first the higher nitrogen of the temperature in feed tube 4 is discharged, thereby prevent that it from entering liquid nitrogen container 1, destroy the homogeneity of temperature in liquid nitrogen container 1, guarantee stored samples safety in container, can reduce to a certain extent liquid nitrogen consumption in liquid nitrogen container simultaneously.
The working process of demist of uncapping is as follows:
When liquid nitrogen container 1 is opened, first by controller 2, controlling hot driving electromagnetic valve 7 opens, after a period of time, the nitrogen higher when temperature is discharged from, when in feed tube 4, temperature reaches enough low, controller 2 controls hot driving electromagnetic valve 7 and cuts out, open 6 pairs of liquid nitrogen containers of liquid inlet electromagnetic valve 1 and carry out liquid feeding, liquid feeding is after a period of time, controller 2 controls liquid inlet electromagnetic valve 6 and cuts out, this liquid feeding time is generally one minute, and the cold air in liquid feeding process can be washed container finish water smoke open, thereby reaches except fog effect.
In discharge feed tube 4 during hot nitrogen, drain time is difficult for holding, if drain time is too short, the nitrogen that temperature is higher does not rack up, these nitrogen enter the homogeneity that liquid nitrogen container 1 can destroy temperature in container when liquid feeding, the sample wherein storing is threatened, and if drain time is long, discharge nitrogen is more, can cause waste.For addressing this problem, as optimal way, on described hot driving pipe 5, be also provided with hot driving temperature sensor 8, and before hot driving temperature sensor 8 is positioned at hot driving electromagnetic valve 7, described hot driving temperature sensor 8 is connected with controller 2.
Hot driving temperature sensor 8, between feed tube 4 and hot driving electromagnetic valve 7, that is to say that hot driving temperature sensor 8 more approaches feed tube 4 compared to hot driving electromagnetic valve 7.So, before hot driving electromagnetic valve 7 is opened, hot driving temperature sensor 8 just can detect nitrogen temperature in hot driving pipe 5 and feed tube 4.
So, in discharge feed tube 4 before hot nitrogen, first system detects hot driving temperature sensor 8 temperature, if nitrogen temperature is lower in its institute's feed tube of surveying 4, enter and in liquid nitrogen container 1, can not destroy the wherein homogeneity of temperature, 2 of controllers are opened liquid inlet electromagnetic valve 6, directly to liquid nitrogen container 1 liquid feeding; If hot driving temperature sensor 8 in the feed tube of surveying 4 nitrogen temperature higher, first 2 of controllers open hot driving electromagnetic valve 7, discharge the hot nitrogen in feed tube 4, when hot driving temperature sensor 8 detects temperature in hot driving pipe 5 when enough low, controller 2 controls hot driving electromagnetic valve 7 and cuts out, liquid inlet electromagnetic valve 6 is opened, and starts liquid feeding.So the discharge of nitrogen in feed tube 4 comparatively exactly, makes its temperature can reach the requirement that enters liquid nitrogen container, can not cause waste again.General when hot driving temperature sensor 8 measured temperatures are during higher than-100 ℃, need to discharge hot nitrogen, and work as hot driving temperature sensor 8 measured temperatures lower than-100 ℃, can carry out liquid feeding to liquid nitrogen container 1.
Above-mentioned level sensor 3 can be magnetic float level indicator, capacitor gauge etc., and as optimal way, described level sensor 3 is differential pressure type level sensor, and described level sensor 3 is communicated with respectively at two ends Shang Xia 1 with liquid nitrogen container.Differential pressure type level sensor is applied widely, easily calibration, and the interior temperature of liquid nitrogen container 1 is comparatively stable, and very little on the survey precision impact of differential pressure type level sensor.
Liquid nitrogen level monitoring system is except to carrying out in liquid nitrogen container 1 automatic liquid supply, also need temperature in container to monitor in real time, to prevent that in container, temperature occurs abnormal, so, as optimal way, described liquid nitrogen container 1 top is provided with high-order temperature sensor 9, and described liquid nitrogen container 1 bottom is provided with low level temperature sensor 10, and described high-order temperature sensor 9 is all connected with controller 2 with low level temperature sensor 10.When uncapping, generally can there is gap to a certain extent in the top and the bottom temperature of liquid nitrogen container 1, high-order temperature sensor 9 and low level temperature sensor 10 can be monitored respectively liquid nitrogen container 1 top and the bottom temperature, and feed back to during by fructufy in controller 2 to read, so more can reflect temperature conditions in liquid nitrogen container 1 comprehensively.
For understanding the liquid nitrogen Expenditure Levels in liquid nitrogen container 1, being in particular this liquid nitrogen level monitoring system increases measurement liquid nitrogen consumption function, for realizing this function, as optimal way, on described controller 2, is connected with timer 11.
The liquid-consumed amount process of concrete measurement is as follows:
The impact of rocking in order to reduce liquid in container as far as possible, measures and does not start measurement during liquid feeding, and liquid feeding finishes to start to measure after 15 minutes; After starting to measure, first controller 2 is recorded level sensor 3 liquid level of surveying, and control timer 11 starts simultaneously, in 3 xylometers of level sensor after liquid level decline certain altitude, stop record, according to the Time Calculation of liquid level falling head in container and timer record, go out liquid nitrogen consumption every day height, thereby draw liquid nitrogen consumption every day, and result is stored in controller.Complete after this operation, timer is zero setting again, and start next group measurement.Generally need nearest 50 the liquid nitrogen consumption data of storage to check to treat output, thereby reflect more accurately the liquid nitrogen consumption of liquid nitrogen container 1.
When unusual condition appears in liquid nitrogen container 1, liquid nitrogen level monitoring system needs and alarm, to prevent accident or to cause the interior sample damage of liquid nitrogen container 1, so, as optimal way, this liquid nitrogen level monitoring system is provided with annunciator 12, and described annunciator 12 is connected with controller 2.When each temperature sensor, level sensor 3 detect abnormal condition or occur the situations such as primary power source de-energizes, communicating interrupt, controller 2 all can send alarm command by presetting to annunciator 12.
Claims (6)
1. liquid nitrogen level monitoring system, it is characterized in that: comprise liquid nitrogen container (1), controller (2), feed tube (4) and for measuring the level sensor (3) of liquid nitrogen container (1) liquid level, described feed tube (4) is communicated with liquid nitrogen container (1), described feed tube (4) is upper is disposed with hot driving pipe (5) and liquid inlet electromagnetic valve (6) along feed liquor direction, on described hot driving pipe (5), be provided with hot driving electromagnetic valve (7), described liquid inlet electromagnetic valve (6), hot driving electromagnetic valve (7) and level sensor (3) are all connected with controller (2).
2. liquid nitrogen level monitoring system as claimed in claim 1, it is characterized in that: on described hot driving pipe (5), be also provided with hot driving temperature sensor (8), and hot driving temperature sensor (8) is positioned between feed tube (4) and hot driving electromagnetic valve (7), and described hot driving temperature sensor (8) is connected with controller (2).
3. liquid nitrogen level monitoring system as claimed in claim 1, is characterized in that: described level sensor (3) is differential pressure type level sensor, and described level sensor (3) is communicated with respectively with the upper and lower two ends of liquid nitrogen container (1).
4. liquid nitrogen level monitoring system as claimed in claim 1, it is characterized in that: described liquid nitrogen container (1) top is provided with high-order temperature sensor (9), described liquid nitrogen container (1) bottom is provided with low level temperature sensor (10), and described high-order temperature sensor (9) is all connected with controller (2) with low level temperature sensor (10).
5. liquid nitrogen level monitoring system as claimed in claim 1, is characterized in that: on described controller (2), be connected with timer (11).
6. liquid nitrogen level monitoring system as claimed in claim 4, is characterized in that: be provided with annunciator (12), described annunciator (12) is connected with controller (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253251.6U CN203877266U (en) | 2014-05-16 | 2014-05-16 | Liquid nitrogen level monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253251.6U CN203877266U (en) | 2014-05-16 | 2014-05-16 | Liquid nitrogen level monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN203877266U true CN203877266U (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420253251.6U Expired - Lifetime CN203877266U (en) | 2014-05-16 | 2014-05-16 | Liquid nitrogen level monitoring system |
Country Status (1)
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| CN (1) | CN203877266U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299462A (en) * | 2015-11-24 | 2016-02-03 | 安徽万瑞冷电科技有限公司 | High-precision liquid nitrogen liquid-level measurement system |
| CN106907888A (en) * | 2017-03-31 | 2017-06-30 | 北京卫星环境工程研究所 | Dead-weight cryogenic pump cycle liquid feed device |
| CN109357730A (en) * | 2018-10-23 | 2019-02-19 | 西南交通大学 | A kind of liquid level detection system based on Electromagnetic Wave Method |
| CN109374090A (en) * | 2018-10-23 | 2019-02-22 | 西南交通大学 | A kind of level monitoring system based on ultrasound |
| WO2019070556A1 (en) * | 2017-10-02 | 2019-04-11 | Romanos John L | Systems and methods for management of cryogenic storage vessels |
| CN114325322A (en) * | 2021-12-28 | 2022-04-12 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Chip super-low cooling device and chip testing system |
-
2014
- 2014-05-16 CN CN201420253251.6U patent/CN203877266U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299462A (en) * | 2015-11-24 | 2016-02-03 | 安徽万瑞冷电科技有限公司 | High-precision liquid nitrogen liquid-level measurement system |
| CN106907888A (en) * | 2017-03-31 | 2017-06-30 | 北京卫星环境工程研究所 | Dead-weight cryogenic pump cycle liquid feed device |
| WO2019070556A1 (en) * | 2017-10-02 | 2019-04-11 | Romanos John L | Systems and methods for management of cryogenic storage vessels |
| CN109357730A (en) * | 2018-10-23 | 2019-02-19 | 西南交通大学 | A kind of liquid level detection system based on Electromagnetic Wave Method |
| CN109374090A (en) * | 2018-10-23 | 2019-02-22 | 西南交通大学 | A kind of level monitoring system based on ultrasound |
| CN114325322A (en) * | 2021-12-28 | 2022-04-12 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Chip super-low cooling device and chip testing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHENGDU CRYOSTECH CRYO EQUIPMENT CO., LTD. Free format text: FORMER OWNER: CHENGDU CRYOSTECH TECHNOLOGY CO., LTD. Effective date: 20150814 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150814 Address after: 611200 Sichuan city of Chengdu province Innovation Road Economic Development Zone Chongzhou Lixing home D61 No. Patentee after: CHENGDU CRYOSTECH EQUIPMENT Co.,Ltd. Address before: 611130, No. three, No. 12, 2, 1818, 11, 5, Guanghua Road, Wenjiang District, Sichuan, Chengdu, China (Pearl River International Garden) Patentee before: CHENGDU BRANCH RICE SCIENCE AND TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230921 Address after: No. 61, D District, Lixing Zhijia, Innovation Avenue, Chongzhou Economic Development Zone, Chengdu, Sichuan Province, 610000 Patentee after: Chengdu keles liquid nitrogen container Co.,Ltd. Address before: 611200 No. D61, Lixing home, Chuangxin Avenue, Chongzhou Economic Development Zone, Chengdu, Sichuan Province Patentee before: CHENGDU CRYOSTECH EQUIPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |