CN200941073Y - Liquid nitrogen saturated vapour pressure - Google Patents
Liquid nitrogen saturated vapour pressure Download PDFInfo
- Publication number
- CN200941073Y CN200941073Y CN 200520098356 CN200520098356U CN200941073Y CN 200941073 Y CN200941073 Y CN 200941073Y CN 200520098356 CN200520098356 CN 200520098356 CN 200520098356 U CN200520098356 U CN 200520098356U CN 200941073 Y CN200941073 Y CN 200941073Y
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- CN
- China
- Prior art keywords
- liquid nitrogen
- pipeline
- saturated vapour
- vapour pressure
- switch valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a measurement apparatus for liquid nitrogen vapor pressures, comprising a switch valve, a pressure sensor, a pipeline and a closed thermal conducting container. One end of the switch valve connects with the pipeline and the other end with the thermal conducting container, while the pressure sensor is arranged on the pipeline. The application process of the measurement apparatus is as follows: turning on the switch valve that connects with the nitrogen source can guide the nitrogen into the pipeline and the thermal conducting container, then pouring the liquid nitrogen into an open-end container and inserting the thermal conducting container into the liquid nitrogen, as a result of which part of the nitrogen in the thermal conducting container being inserted into the liquid nitrogen can be condensed to be liquid one which has the same status as that outside the thermal conducting container. In this way, the data can be delivered to the computer via the pressure sensor and displayed on the computer screen so that the vapor pressure is correctly measured.
Description
Technical field
The utility model relates to liquid nitrogen saturated vapour pressure determinator.
Background technology
In the measuring process in the specific surface area of solid powder/particle and aperture, major part is that to adopt liquid nitrogen be that medium is measured, and the liquid nitrogen saturated vapour pressure is the important parameter in calculated specific surface area and aperture.The liquid nitrogen saturated vapour pressure is very sensitive to liquid nitrogen temperature, if liquid nitrogen temperature changes to subzero 200 degrees centigrade from subzero 190 degrees centigrade, the liquid nitrogen saturated vapour pressure will be reduced to 459 mm Hg from 1428.
Being determined as of present liquid nitrogen saturated vapour pressure: liquid nitrogen is contained in the open container, measure liquid nitrogen temperature with thermometer then, calculate the saturated vapour pressure of liquid nitrogen by temperature parameter, because the volatilization of liquid nitrogen surface is very fast, saturated vapour pressure is very sensitive to liquid nitrogen temperature, adopt the temperature parameter error of thermometer measure big, cause the saturated vapour pressure error measured big.
Summary of the invention
Measure the big defective of liquid nitrogen saturated vapour pressure error in order to solve existing mode, the utility model proposes a kind of liquid nitrogen saturated vapour pressure determinator.
For achieving the goal, the utility model is realized by the following technical solutions:
Liquid nitrogen saturated vapour pressure determinator is characterized in that: it is made up of switch valve, pressure transducer, pipeline, airtight thermal conductive container; Switch valve one end is connected with pipeline, and the pipeline other end is communicated with thermal conductive container, and pressure transducer is installed on the pipeline.
If the use of determinator is as follows: switch valve is connected with source nitrogen, opens switch valve, and nitrogen enters in pipeline and the thermal conductive container, the off switch valve; Then liquid nitrogen is poured in the open-top receptacle, thermal conductive container is extend in the liquid nitrogen, thermal conductive container stretches into part nitrogen in the liquid nitrogen, and to be condensed into liquid nitrogen rapidly identical with the outer liquid nitrogen state of thermal conductive container, thereby by pressure transducer data transfer is shown to computing machine, measures saturated vapour pressure.
Effective effect of this determinator: can pass to computing machine to signal by pressure transducer, accurately measure the saturated vapour pressure of liquid nitrogen, show saturated vapour pressure fast, overcome existing metering system fully and have the big defective of error.And has advantage easy to operate, quick measurement.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Liquid nitrogen saturated vapour pressure determinator as shown in Figure 1 is made up of switch valve 1, pressure transducer 4, pipeline 2, airtight thermal conductive container 3.Switch valve 1 one ends are connected with pipeline 2, and pipeline 2 other ends are communicated with thermal conductive container 3, and pressure transducer 4 is installed on the pipeline.
Described thermal conductive container preferably adopt glass container,, promptly satisfy request for utilization, convenient again observation.
Described pressure transducer preferably adopts digital pressure sensor, can make measurement result more accurate like this.
During use, as shown in Figure 1, switch valve 1 is connected with source nitrogen 7, and the interface of pressure transducer 4 is connected with computing machine.Liquid nitrogen 6 to be measured is contained in the open-top receptacle 5, opens switch valve 1, make nitrogen be full of pipeline 2, thermal conductive container 3; The off switch valve 1 then, thermal conductive container 3 is extend in the liquid nitrogen 6 to be measured, make the part nitrogen in the thermal conductive container be condensed into liquid nitrogen rapidly, identical with outer liquid nitrogen 6 states to be measured of thermal conductive container, by the signal transmission of pressure transducer 4, measure the liquid nitrogen saturated vapour pressure easily.
Described the open-top receptacle 5 common and supporting uses of liquid nitrogen saturated vapour pressure determinator.
Claims (3)
1, liquid nitrogen saturated vapour pressure determinator is characterized in that: it is made up of switch valve, pressure transducer, pipeline, airtight thermal conductive container; Switch valve one end is connected with pipeline, and the pipeline other end is communicated with the tubulose thermal conductive container, and pressure transducer is installed on the pipeline.
2, liquid nitrogen saturated vapour pressure determinator according to claim 1, it is characterized in that: described thermal conductive container is a glass container.
3, liquid nitrogen saturated vapour pressure determinator according to claim 1, it is characterized in that: described pressure transducer is a digital pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520098356 CN200941073Y (en) | 2005-10-11 | 2005-10-11 | Liquid nitrogen saturated vapour pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520098356 CN200941073Y (en) | 2005-10-11 | 2005-10-11 | Liquid nitrogen saturated vapour pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200941073Y true CN200941073Y (en) | 2007-08-29 |
Family
ID=38747249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520098356 Expired - Fee Related CN200941073Y (en) | 2005-10-11 | 2005-10-11 | Liquid nitrogen saturated vapour pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200941073Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607993A (en) * | 2012-04-09 | 2012-07-25 | 上海化工研究院 | Modularized vacuum system of saturated vapor pressure and solid density of tested substance and applications |
| WO2021183271A1 (en) * | 2020-03-10 | 2021-09-16 | Chart Inc. | Liquid density measurement device, system and method |
-
2005
- 2005-10-11 CN CN 200520098356 patent/CN200941073Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607993A (en) * | 2012-04-09 | 2012-07-25 | 上海化工研究院 | Modularized vacuum system of saturated vapor pressure and solid density of tested substance and applications |
| WO2021183271A1 (en) * | 2020-03-10 | 2021-09-16 | Chart Inc. | Liquid density measurement device, system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20101011 |