CN85201237U - Liquid level comtrol device for cryogenic liquid - Google Patents
Liquid level comtrol device for cryogenic liquid Download PDFInfo
- Publication number
- CN85201237U CN85201237U CN 85201237 CN85201237U CN85201237U CN 85201237 U CN85201237 U CN 85201237U CN 85201237 CN85201237 CN 85201237 CN 85201237 U CN85201237 U CN 85201237U CN 85201237 U CN85201237 U CN 85201237U
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- Prior art keywords
- liquid
- temperature
- low
- vessel
- liquid level
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Abstract
The utility model relates to a liquid level control device for the cryogenic liquid, the purpose of the utility model is to further improve the liquid level control device of a heat-insulating and cryogenic vessel whose top is provided with an opening. The utility model is characterized in that the cryogenic vessel is separated from a complementary liquid reservoir, the inner pressure generated by the evaporation of the cryogenic liquid in the liquid reservoir forces the cryogenic liquid in the liquid reservoir to inject into the cryogenic vessel through the pipeline, and the liquid level of the cryogenic vessel can be maintained at a constant height. The capacity of the cryogenic vessel arranged on the optional position above the liquid reservoir can be fully utilized by the liquid level control device, the height of the liquid level can be maintained for a long time, and the structure of the utility model is simple.
Description
The utility model belongs to the control device of liquid level.Specifically, be a kind of improvement to liquid levels height controller in the low-temperature (low temperature) vessel.
Cryogenic liquid in open top, the heat-insulated container generally is as refrigerant, is used for cooling off article.Because vessel port, cryogenic liquid constantly evaporates, thereby the height of liquid level constantly descends.And when reality is used, require the liquid level of low-temperature (low temperature) vessel to remain on constant height usually.For addressing this problem, the patent No. is that the French Patent (FRP) of FR2308068 has proposed a kind of control device that the container lower curtate is moved up and keeps liquid level.This device has a liquid reservoir, and it is placed on the low-temperature (low temperature) vessel the inside, makes with low-temperature (low temperature) vessel to link to each other.And its top, just the bottom of low-temperature (low temperature) vessel then is made of a horizontal baffle that can move up, and this dividing plate has a dynamic seal ring, makes the cryogenic liquid in two containers spaced-apart.An intubate also is housed on dividing plate, and the end of this intubate is immersed in the liquid part in the storage liquid.The evaporation of cryogenic liquid in low-temperature (low temperature) vessel when the height of liquid level falls, is contained in the solenoid valve action on the liquid reservoir, makes that pressure increases in the liquid reservoir, promote to move on the horizontal baffle by intubate, thereby the liquid level build-up that makes low-temperature (low temperature) vessel is to original height.But, because the position of this low-temperature (low temperature) vessel bottom is along with the time raises gradually, therefore in this scope that container bottom can raise, can not place the article that are cooled, the useful volume of container can not make full use of, again since make liquid level maintain certain altitude the retainable time be relevant with the amount of the velocity of evaporation of cryogenic liquid and the cryogenic liquid in the low-temperature (low temperature) vessel, when so little or cryogenic liquid velocity of evaporation is very fast when the volume of low-temperature (low temperature) vessel, it is quite short that liquid level can maintain the time of constant altitude, and as the certain degree of difficulty that is sealed with of the horizontal baffle at liquid reservoir top and low-temperature (low temperature) vessel inwall.
The purpose of this utility model is to make full use of the volume of the low-temperature (low temperature) vessel that places optional position, liquid reservoir top and liquid level can be kept enough for a long time in order to provide a kind of, and the control device of simply constructed a kind of cryogenic liquid liquid level.
The utility model is achieved in that low-temperature (low temperature) vessel is an open-topped heat-insulated container, and liquid reservoir then is the heat-insulated container of a sealing.Two containers separately are equipped with two pipelines on the liquid reservoir, wherein a pipeline is used for to low-temperature (low temperature) vessel filling cryogenic liquid, and another root pipeline communicates with atmosphere through solenoid valve, and the open and close of this solenoid valve is then controlled by the signal that liquid level detector provides.Work as closed electromagnetic valve, the liquid in the liquid reservoir is owing to the gaseous tension that the cryogenic liquid evaporation produces injects low-temperature (low temperature) vessel; When solenoid valve is opened, the gas on the liquid level is communicated with atmosphere, and pressure reduction disappears, and then liquid reservoir stops to inject cryogenic liquid to low-temperature (low temperature) vessel.Liquid level remains on constant altitude in this way.
The utility model does not have specific (special) requirements because adopt two independently containers on the structure, so container is simple in structure, select for use the container of selling on the market to get final product.Because the significant height of low-temperature (low temperature) vessel is constant substantially.Therefore the volume that can make full use of container is placed the article that are cooled, and owing to be to adopt compensation type to keep liquid level, as long as liquid reservoir is enough big, liquid level can be kept considerable time.In addition, low-temperature (low temperature) vessel can place the optional position that makes its liquid level be higher than the liquid reservoir liquid level.
Concrete device of the present utility model can be provided by following embodiment and accompanying drawing.
Figure is the synoptic diagram of the grasshopper of proposition according to the present invention.
The working condition of the concrete device that the utility model proposes is described below in conjunction with Fig. 1.
This device comprise one open-topped, cryogenic liquid is housed, as the heat-insulated container (1) of liquid nitrogen, wherein place article to be cooled, adsorption pump (2) for example, a liquid reservoir (3) of depositing the cryogenic liquid that replenishes usefulness, it is heat insulation airtight container, and for example Shuan Ceng Dewar also.Liquid reservoir is equipped with two pipelines.One end (5) of pipeline (4) places the low-temperature (low temperature) vessel top.The other end (6) inserts in the interior cryogenic liquid of liquid reservoir.One end (8) of pipeline (7) places the top of liquid reservoir, and the other end (9) communicates with atmosphere by normally open solenoid valve (10).On the desired height of low-temperature (low temperature) vessel liquid level, place a liquid level detector (11), when liquid level is in the requirement height, detecting device provides signal, makes solenoid valve keep open mode, and liquid reservoir is communicated with atmosphere, at this moment, liquid reservoir does not replenish cryogenic liquid to low-temperature (low temperature) vessel.When liquid level is lower than the requirement height, detecting device provides signal, make closed electromagnetic valve, liquid reservoir and atmospheric isolation are because the evaporation of cryogenic liquid, the pressure of liquid reservoir constantly rises, when reaching certain value, force the cryogenic liquid in the liquid reservoir to inject cryogenic liquid to low-temperature (low temperature) vessel, to replenish the cryogenic liquid that evaporates by pipeline (4), the height of liquid level is gone up, when reaching the requirement height, i.e. during the position of liquid level detector setting, solenoid valve is opened, liquid reservoir is communicated with atmosphere, vaporized gas is let out to atmosphere, and pressure reduction disappears, and stops to inject cryogenic liquid to container, like this, liquid level just can remain on the height of requirement.Adopt this kind device, low-temperature (low temperature) vessel can use more than three days at least continuously.
Claims (4)
1, a kind of control device of automatic control liquid level.This device has a low-temperature (low temperature) vessel and the liquid reservoir that additional cryogenic liquid is used.Two containers have a public dividing plate.Low-temperature (low temperature) vessel [1] and the liquid reservoir [3] of being characterised in that of the present utility model separates, and low-temperature (low temperature) vessel [1] is placed on and makes its liquid level be higher than the optional position of liquid reservoir [3] liquid level.Liquid reservoir [3] seals, a pipeline [4] is housed on it, one end [6] is immersed in the cryogenic liquid of liquid reservoir [3], and the other end [5] places the top of low-temperature (low temperature) vessel [1], and a pipeline [7] that communicates with atmosphere through solenoid valve [10] also is housed at the top of liquid reservoir [3].The action of solenoid valve [10] is then controlled by the signal that low-temperature (low temperature) vessel liquid level detector [11] provides.
2, control device according to claim 1 is characterized in that low-temperature (low temperature) vessel (1) and liquid reservoir (3) all are heat insulation.
3, control device according to claim 1 is characterized in that the bottom of an end (6) of pipeline (4) near liquid reservoir (3).
4, control device according to claim 1 is characterized in that the position that detecting device (11) is placed as required can be upper and lower mobile arbitrarily, thereby can reach the purpose of the various differing heights cryogenic liquid of automatic control liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85201237 CN85201237U (en) | 1985-04-01 | 1985-04-01 | Liquid level comtrol device for cryogenic liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85201237 CN85201237U (en) | 1985-04-01 | 1985-04-01 | Liquid level comtrol device for cryogenic liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85201237U true CN85201237U (en) | 1986-01-08 |
Family
ID=4797357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85201237 Ceased CN85201237U (en) | 1985-04-01 | 1985-04-01 | Liquid level comtrol device for cryogenic liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85201237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886738B (en) * | 2009-05-12 | 2013-01-02 | 南通中集罐式储运设备制造有限公司 | Limit-quantity charging device and low-temperature vessel comprising same |
-
1985
- 1985-04-01 CN CN 85201237 patent/CN85201237U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886738B (en) * | 2009-05-12 | 2013-01-02 | 南通中集罐式储运设备制造有限公司 | Limit-quantity charging device and low-temperature vessel comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |