CN205606164U - Device that forfeiture of low temperature container vacuum detected - Google Patents
Device that forfeiture of low temperature container vacuum detected Download PDFInfo
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- CN205606164U CN205606164U CN201620275148.0U CN201620275148U CN205606164U CN 205606164 U CN205606164 U CN 205606164U CN 201620275148 U CN201620275148 U CN 201620275148U CN 205606164 U CN205606164 U CN 205606164U
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Abstract
The utility model provides a device that forfeiture of low temperature container vacuum detected, the device includes: a temperature sensor, the 2nd temperature sensor, signal acquisition module and data processing module, a temperature sensor are used for measuring low temperature container's outer jar of the outer surface temperature, and the 2nd temperature sensor is used for measuring the ambient temperature of low temperature container place environment, and the signal acquisition module is gathered respectively a temperature sensor with signal and external jar the outer surface temperature that the 2nd temperature sensor's temperature signal, data processing module received signal collection module gathered carry out the comparison with ambient temperature, and then judge that it loses whether to take place the vacuum. The device reliable and simple that this vacuum forfeiture detected not only can use on the new product, also can use on the product that has come into operation to change to the product is less, and is nimble, facilitates the use and short response time, can strive for the valuable time for the low temperature container's of vacuum forfeiture emergency treatment.
Description
Technical field
This utility model relates to cryogenic engineering and cryogenic technique field, particularly relates to the Loss of vacuum detection device of low-temperature (low temperature) vessel.
Background technology
In low temperature accumulating, high-vacuum insulation is widely adopted because of its good heat-insulating property, thus existing low-temperature (low temperature) vessel generally includes: outer container, inner pressurd vessel and the vacuum interlayer being arranged between interior outer container, but, leakage venting can cause slowly degenerating of vacuum interlayer, weld seam the most up to standard, the leakage of unexpected external impact and interlayer pipeline will also result in the degradation of vacuum and even loses.After losing vacuum, in container, the pressure of cryogenic liquid can gradually rise and gasify, if gas in container can not get discharging timely, exploding because of superpressure, even if being discharged, also can impact environment.
For these reasons, low-temperature (low temperature) vessel laminated vacuum is lost and has been done sufficient research by lot of domestic and foreign scholar, wherein thank to peak in the thesis for the doctorate of " experiment and heat-transfer mechanism research are lost in high vacuum multiple layer heat insulation container perfect vacuum ", detailed elaborating the heat compensator conducting property after low-temperature (low temperature) vessel Loss of vacuum, liquid flowing and temperature and pressure rise rule；Zhu Ming (Zhu Ming) in Experimental Investigation of Thermal Response on High-Vacuum-Multilayer-Insulation Cryogenic Tank after Sudden Catastrophic Loss of Insulation Vacuum (insulation vacuum sudden catastrophic loss after a high vacuum multiple layer heat insulation low-temperature storage tank thermal response experimental study) literary composition to low-temperature (low temperature) vessel Loss of vacuum after, deep analysis has been done in the thermal response of interlayer.Result of study according to these two papers, in needing the flowing of continuous detecting liquid, tank, whether numerous parameter such as temperature and pressure just can occur Loss of vacuum with synthetic determination, thus detection process and decision method are the most troublesome, the highest to professional requirement, it is difficult to popularization and application.
In terms of detection Loss of vacuum, the most also have and use observation inner canister fluid pressure to raise and the straightforward procedure of outer tank condensation.It is known that inner canister fluid pressure raises the heat being because environment passes to cryogenic liquid by outer wall, mezzanine space, adiabator and inwall, it is allowed to vaporization build-up of pressure and raises；Outer wall condensation is because wall surface temperature and has been less than in environment caused by the dew point temperature of steam, and due to these reasons, the method boosted and condense is inevitable there will be retardance in time, and this delay is fatal to the low-temperature (low temperature) vessel of Loss of vacuum.
Utility model content
The technical problems to be solved in the utility model is the device providing a kind of flexible and undelayed low-temperature (low temperature) vessel Loss of vacuum to detect.
For solving above-mentioned technical problem, the utility model proposes the device of a kind of low-temperature (low temperature) vessel Loss of vacuum detection, including:
First temperature sensor, measures the outer tank outside wall temperature of low-temperature (low temperature) vessel；
Second temperature sensor, measures the ambient temperature of low-temperature (low temperature) vessel place environment；
Signal acquisition module, gathers described first temperature sensor and the temperature signal of described second temperature sensor respectively；
Data processing module, receives the signal that signal acquisition module gathers, and external tank wall temperature and ambient temperature compare and determine whether Loss of vacuum.
Preferably, the device of described low-temperature (low temperature) vessel Loss of vacuum detection also includes: the client being connected with described data processing module communication.
Preferably, the device of described low-temperature (low temperature) vessel Loss of vacuum detection also includes: in order to realize a transport module of signal transmission between described signal acquisition module and described data processing module.
Preferably, the device of described low-temperature (low temperature) vessel Loss of vacuum detection also includes: in order to realize the secondary transport module of signal transmission between described data processing module and described client.
Preferably, described low-temperature (low temperature) vessel includes: outer tank, in the inner canister within outer tank and be formed at the mezzanine space between inside and outside tank, described inner canister is connected with described outer tank by supporting, and described first temperature sensor is close to the bottom of outer tank wall and is positioned at the position of non-contact support.
Compared with prior art, this utility model has the advantages that the method and apparatus that Loss of vacuum of the present utility model detects is simple, may be applied not only on new product, it is also possible to apply on the product come into operation, and the change to product is less, use flexibly and conveniently；The inner canister that compares boosting and the decision method of outer tank condensation, detection method of the present utility model has the advantage that response time is short, and valuable time is striven in the emergency processing for the low-temperature (low temperature) vessel of Loss of vacuum.
Accompanying drawing explanation
Fig. 1 is the structural representation that this utility model low-temperature (low temperature) vessel Loss of vacuum detection device is applied on low-temperature (low temperature) vessel；
Fig. 2 is the flow chart of low-temperature (low temperature) vessel Loss of vacuum detection method；
Fig. 3 is a kind of flow chart of steps determining whether Loss of vacuum；
Fig. 4 is the flow chart of steps that another kind determines whether to occur Loss of vacuum；
Fig. 5 is the flow chart of steps determining whether to occur Loss of vacuum according to temperature difference；
Description of reference numerals is as follows: 1, inner canister；2, support；3, adiabator；4, mezzanine space；5, outer tank；6, the first temperature sensor；7, the second temperature sensor；9, a transport module；10, data processing module；11, secondary transport module；12, client.
Detailed description of the invention
In order to further illustrate principle of the present utility model and structure, in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
The device of Loss of vacuum of the present utility model detection is applied on the low-temperature (low temperature) vessel of the deep cooling mediums such as storage liquid nitrogen, liquefied natural gas, liquid oxygen, liquid argon, carbon dioxide liquid, in order to detect whether low-temperature (low temperature) vessel occurs Loss of vacuum.
Refering to Fig. 1, low-temperature (low temperature) vessel includes: inner canister 1, outer tank 5 and be formed at the mezzanine space 4 between inside and outside tank 1,5.To be fixed on outer tank 5 internal by supporting 2 for inner canister 1, and the mezzanine space 4 between inner canister 1 and outer tank 5 is to be additionally provided with adiabator 3 in vacuum space, and mezzanine space 4, to guarantee inner canister heat-insulating property, prevents the cryogenic media in inner canister 1 from gasifying.
Refering to Fig. 2, low-temperature (low temperature) vessel Loss of vacuum detection method comprises the steps:
Step S11, measures the temperature of outer tank 5 outer wall of low-temperature (low temperature) vessel.
When measuring outer tank 5 outside wall temperature, preferably temperature sensor is close to the bottom of outer tank 5 outer wall, and is positioned at the position of non-contact support 2.Mainly in view of the outside wall temperature 2 heat conduction impacts the most supported of the part supporting 2 and outer tank 5 wall contacts, and layer vacuum damages, mainly enhance the heat conduction of gas molecule in interlayer to be conducted heat to outer tank by gas molecule again, gas molecule heat conduction is compared the heat-transfer effect of support 2 heat conduction and is wanted faint many, thus measure the temperature at outer tank 5 outer wall support 2 and be difficult to reflect that layer vacuum destroys and the heat transfer that causes comprehensively, thus impact finally judges the conclusion of Loss of vacuum.
Step S12, measures the ambient temperature of low-temperature (low temperature) vessel place environment.
When measuring ambient temperature, preferably environment temperature sensor is arranged in away from ground certain altitude and leeward without rain without the position of direct sunlight, avoid the casual condition impacts on measurement result such as wind, sunlight, rainwater, the condition arranged in studying with Pass Test as far as possible.
Step S13, external tank wall temperature and ambient temperature compare and determine whether Loss of vacuum.
When carrying out this step and judging, directly the temperature of outer tank wall can be compared with ambient temperature, determine whether in conjunction with the decision condition set Loss of vacuum；The temperature of outer tank wall and the temperature difference of ambient temperature relatively time, can also be calculated, the decision condition of temperature difference with setting is compared, and then determine whether Loss of vacuum.
In one embodiment, refering to Fig. 3, in above-mentioned steps S13, external tank wall temperature and ambient temperature compare and determine whether that the step that Loss of vacuum occurs may particularly include:
Step S311, transfers the temperature deck watch of outer tank outside wall temperature when recording the Loss of vacuum having varying environment temperature corresponding；
Step S312, determines whether Loss of vacuum according to described temperature deck watch.
This temperature comparison sheet comes from permanent theory and experimental studies results, the low-temperature (low temperature) vessel of experimentation difference vacuum insulation structure is after Loss of vacuum, the outside wall surface temperature of the outer tank under no ambient temperature, and the wall surface temperature of the outer tank of the low-temperature (low temperature) vessel theoretical Calculation of Heat Transfer after Loss of vacuum is removed to revise by this experimental result, thus draw under continuous print ambient temperature, the outside wall temperature of the low-temperature (low temperature) vessel of Loss of vacuum, and as judging the foundation of Loss of vacuum.
Table 1 shows the temperature comparison sheet at a temperature of several varying environment.
According to this table 1, it is assumed that the ambient temperature currently recorded is 10 DEG C, if the outer tank outside wall temperature recorded is 8 DEG C, then judge that low-temperature (low temperature) vessel does not occurs Loss of vacuum, if the outer tank outside wall temperature recorded is 4 DEG C, then judge that low-temperature (low temperature) vessel has occurred Loss of vacuum.
In other embodiments, it is possible to judge Loss of vacuum according to temperature difference, refering to Fig. 4, above-mentioned steps S13 specifically includes:
Step S321, calculates outer tank outside wall temperature and the temperature difference of ambient temperature.
Step S322, determines whether Loss of vacuum according to described temperature difference.
When there is not Loss of vacuum in low-temperature (low temperature) vessel, the temperature difference of outer tank outside wall temperature and ambient temperature is in rational interval range, when there is Loss of vacuum, outer tank outside wall temperature declines rapidly, it is further exacerbated by the temperature difference with ambient temperature, also has been able to determine whether Loss of vacuum thereby through temperature difference.
It is preferred that refering to Fig. 5, in above-mentioned steps S322, determine whether that the step that Loss of vacuum occurs specifically includes according to described temperature difference:
Step S321, transfers the temperature difference deck watch of the temperature difference of outer tank when recording the Loss of vacuum having varying environment temperature corresponding and environment；
Step S322, knows no generation Loss of vacuum according to described Temperature Difference Ratio to list deciding.
Temperature difference comparison sheet also comes from permanent theory and experimental studies results, the low-temperature (low temperature) vessel of experimentation difference vacuum insulation structure is after Loss of vacuum, the outside wall surface temperature of the outer tank under no ambient temperature and the difference of ambient temperature, and the difference of outer tank wall and the ambient temperature revising the low-temperature (low temperature) vessel theoretical Calculation of Heat Transfer after Loss of vacuum is gone by this experimental result, thus draw under continuous print ambient temperature, the outside wall temperature of Loss of vacuum and the difference of ambient temperature, and as judging the foundation of Loss of vacuum.
When ambient temperature is less than 5 DEG C, if temperature difference is more than 6 DEG C, judge Loss of vacuum；When ambient temperature is between 5 DEG C to 10 DEG C, if temperature difference is more than 5 DEG C, judge Loss of vacuum；When ambient temperature is between 11 DEG C to 25 DEG C, if temperature difference is more than 3 DEG C, judge Loss of vacuum；When ambient temperature is more than 25 DEG C, if temperature difference is more than 2.5 DEG C, judge Loss of vacuum.
In preferred embodiment, the detection method of low-temperature (low temperature) vessel Loss of vacuum of the present utility model further comprises the steps of: when judging to occur Loss of vacuum, reports to the police.
Type of alarm can be that screen shows, on-the-spot and Control Room audible alarm, or, send in the client of related management personnel, it is also possible to be the combination of various type of alarm.
The method of this Loss of vacuum detection is simple, may be applied not only on new product, it is also possible to apply on the product come into operation, and the change to product is less, uses flexibly and conveniently；The inner canister that compares boosting and the decision method of outer tank condensation, detection method of the present utility model has the advantage that response time is short, and valuable time is striven in the emergency processing for the low-temperature (low temperature) vessel of Loss of vacuum.
Based on above-mentioned detection method, this utility model provides the device of a kind of low-temperature (low temperature) vessel Loss of vacuum detection, as it is shown in figure 1, this detection device specifically includes that first temperature sensor the 6, second temperature sensor 7, signal acquisition module 8 and data processing module 10.
First temperature sensor 6 is arranged on the outer wall of outer tank 5, in order to measure the outer tank outside wall temperature of low-temperature (low temperature) vessel.It is preferred that the first temperature sensor 6 is close to the bottom of outer tank wall and is positioned at the position of non-supported contact.The steel pipe of diameter 8mm length 50mm axially can be cut, be welded in tank bottom non-supported contact site by half therein, one end closure plate is welded, and the other end inserts the first temperature sensor 6, is close to outer tank wall.
Second temperature sensor 7 is arranged on low-temperature (low temperature) vessel institute in the environment, in order to measure ambient temperature.It is preferred that the second temperature sensor 7 be arranged in away from ground certain altitude and leeward without rain without the position of direct sunlight, it is to avoid the casual condition impacts on measurement result such as wind, sunlight, rainwater.
Signal acquisition module 8 can be electrically connected with by wired mode and first temperature sensor the 6, second temperature sensor 7, also can wirelessly with first, second temperature sensor 6,7 communication, to gather the first temperature sensor 6 and temperature signal of the second temperature sensor 7 respectively to, and temperature signal is sent data processing module 10.
Data processing module 10 receives the signal that signal acquisition module 9 gathers, and externally tank wall temperature and ambient temperature compare, and then determines whether Loss of vacuum.
Loss of vacuum detection method according to above-mentioned low-temperature (low temperature) vessel, data processing module 10 relatively outer tank outside wall temperature and ambient temperature carry out Loss of vacuum judge time, both can directly comparison outer tank outside wall temperature and ambient temperature, the temperature difference of outer tank outside wall temperature and ambient temperature can also be calculated, and determine whether Loss of vacuum according to temperature difference.
When direct comparison outer tank outside wall temperature and ambient temperature, outer tank outside wall temperature as corresponding in a certain ambient temperature fall into outer tank outside wall temperature scope during Loss of vacuum, i.e. judges Loss of vacuum, otherwise, it is determined that there is not Loss of vacuum.
When determining whether to occur Loss of vacuum by comparison temperature difference (outer tank outside wall temperature and the difference of ambient temperature), temperature difference as corresponding in a certain ambient temperature falls into temperature range during Loss of vacuum, i.e. judge Loss of vacuum, otherwise judge Loss of vacuum.
Data processing module 10 is arranged in a server of office, it can be connected with signal acquisition module 8 by wired connection mode and receive the temperature signal of its transmission, also can be wirelessly, as the transport module 9 in figure carries out communication with signal acquisition module, it is thus achieved that the outer tank outside wall temperature signal of signal acquisition module collection and ambient temperature signal.
It is preferred that the device of low-temperature (low temperature) vessel Loss of vacuum of the present utility model detection also includes: the client being connected with described data processing module communication.This client can be the computer of relevant supervisor, mobile phone or other mobile terminals etc..
Process when data processing module 10 completes data, judge and after storage, as judged Loss of vacuum, also by secondary transport module 11 or other wired connections and client communication, result of determination is sent to client carry out reporting to the police, reminding, making management personnel know dangerous situation in the very first time, the quality time is striven in the emergency processing for the low-temperature (low temperature) vessel of Loss of vacuum.
Claims (5)
1. the device of a low-temperature (low temperature) vessel Loss of vacuum detection, it is characterised in that including:
First temperature sensor, measures the outer tank outside wall temperature of low-temperature (low temperature) vessel；
Second temperature sensor, measures the ambient temperature of low-temperature (low temperature) vessel place environment；
Signal acquisition module, gathers described first temperature sensor and the temperature signal of described second temperature sensor respectively；
Data processing module, receives the signal that signal acquisition module gathers, and external tank wall temperature and ambient temperature compare and determine whether Loss of vacuum.
2. the device of low-temperature (low temperature) vessel Loss of vacuum detection as claimed in claim 1, it is characterised in that also include: the client being connected with described data processing module communication.
3. the device of low-temperature (low temperature) vessel Loss of vacuum detection as claimed in claim 2, it is characterised in that also include: in order to realize a transport module of signal transmission between described signal acquisition module and described data processing module.
4. the device of low-temperature (low temperature) vessel Loss of vacuum detection as claimed in claim 3, it is characterised in that also include: in order to realize the secondary transport module of signal transmission between described data processing module and described client.
5. the device of the low-temperature (low temperature) vessel Loss of vacuum detection as described in claim 1-4 any one, it is characterized in that, described low-temperature (low temperature) vessel includes: outer tank, in the inner canister within outer tank and be formed at the mezzanine space between inside and outside tank, described inner canister is connected with described outer tank by supporting, and described first temperature sensor is close to the bottom of outer tank wall and is positioned at the position of non-contact support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620275148.0U CN205606164U (en) | 2016-04-06 | 2016-04-06 | Device that forfeiture of low temperature container vacuum detected |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620275148.0U CN205606164U (en) | 2016-04-06 | 2016-04-06 | Device that forfeiture of low temperature container vacuum detected |
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| CN205606164U true CN205606164U (en) | 2016-09-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110291325A (en) * | 2017-01-16 | 2019-09-27 | 克里奥塞尔特有限责任公司 | Device and method for determining the insulation quality of double walled vacuum thermally insulated container |
| CN112420310A (en) * | 2020-09-29 | 2021-02-26 | 上海应用技术大学 | Frosting-proof self-adaptive heating device for outdoor superconducting magnet |
| CN114812980A (en) * | 2022-06-29 | 2022-07-29 | 湖南凌翔磁浮科技有限责任公司 | Dewar state dynamic monitoring method and device |
-
2016
- 2016-04-06 CN CN201620275148.0U patent/CN205606164U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110291325A (en) * | 2017-01-16 | 2019-09-27 | 克里奥塞尔特有限责任公司 | Device and method for determining the insulation quality of double walled vacuum thermally insulated container |
| CN112420310A (en) * | 2020-09-29 | 2021-02-26 | 上海应用技术大学 | Frosting-proof self-adaptive heating device for outdoor superconducting magnet |
| CN114812980A (en) * | 2022-06-29 | 2022-07-29 | 湖南凌翔磁浮科技有限责任公司 | Dewar state dynamic monitoring method and device |
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