CN201974317U - Gas sampling device - Google Patents
Gas sampling device Download PDFInfo
- Publication number
- CN201974317U CN201974317U CN2010206539094U CN201020653909U CN201974317U CN 201974317 U CN201974317 U CN 201974317U CN 2010206539094 U CN2010206539094 U CN 2010206539094U CN 201020653909 U CN201020653909 U CN 201020653909U CN 201974317 U CN201974317 U CN 201974317U
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- sampler
- gas
- sampling
- sampling device
- airscoop shroud
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Abstract
The utility model relates to a gas sampling device, which is characterized in that the gas sampling device comprises an intake hood arranged in a low pressure cabin; the intake hood is in a sealed box structure; only one end of the intake hood is provided with a sampling conduit; a heater is mounted in the intake hood; the other end of the intake hood is connected with an electromagnetic valve, a sampling pump, and a sampler in sequence by pipelines; the sampler comprises a cavity; the side surfaces of the cavity are respectively provided with a gas outlet; and all the gas outlets are arranged on the same section of the sampler; each gas outlet of the sampler is provided with a transducer; and a small hole is arranged on an end cover of the sampler and is communicated with the atmosphere. The gas sampling device rises the temperature and boosts the pressure of tested gas to the normal working scope of the transducers; therefore, the gas testing problem under extreme conditions (low pressure and low temperature environments) can be solved; and the smooth implementation of the test and the test precision are also guaranteed.
Description
Technical field
The utility model relates to a kind of sampler, particularly about the gas sampling device under a kind of low-temp low-pressure state.
Background technology
The method of direct sample is generally adopted in existing gas sample, and soon sampling probe directly stretches in the container or sampled gas is connected to sensor by sampling pipe and gets final product, and this method is feasible for the sampling of gas under the conventional state.But the gas sample for (as low temperature, low air pressure condition) under the special state then can not meet the demands, and this is that pressure need equal or approach atmospheric pressure because the normal operation of sensor temperature is many more than-40 ℃.Therefore,, exceeded the normal range of operation of sensor for-50 ℃ and low pressure (vacuum) state that the hypobaric chamber simulated environment exists, cause sensor can't work or the testing result appearance than large deviation.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides the gas sampling device under a kind of low-temp low-pressure state, by this device low-temp low-pressure gas is carried out supplying sensor behind the pressure build up.
For achieving the above object, the utility model is taked following technical scheme: a kind of gas sampling device, it is characterized in that: it comprises that one is arranged on the airscoop shroud in the hypobaric chamber, and described airscoop shroud is the closed box structure, and only the end at described airscoop shroud is provided with a sampling catheter; One well heater is installed in the described airscoop shroud, and the other end of described airscoop shroud connects a solenoid valve, a sampling pump and a sampler successively by pipeline; Described sampler comprises a cavity, all offers a gas outlet on the side of described cavity, and described gas outlet all is positioned on the same section of described sampler; Each of described sampler all is equipped with a sensor on the described gas outlet, opens an aperture on the end cap of described sampler and communicates with atmosphere.
The cavity of described sampler adopts triangular prism, quadrangular or other forms.
Described well heater adopts fin formula electric heating tube, and thermal source adopts the PTC themistor with constant temperature heating function.
Described sampling pump adopts low discharge sampling vacuum pump, and the inlet end of described vacuum pump is negative pressure, and exhaust end is higher than atmospheric pressure.
The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is provided with a miniwatt constent temperature heater in airscoop shroud, gas carries out heat interchange by the miniwatt constent temperature heater, thereby detected gas is warming up to the normal operation of sensor scope, and the thermal value of miniwatt constent temperature heater is very little, can ignore the influence of low temperature environment in the cabin.2, the utility model with pipeline that airscoop shroud is connected on a sampling pump and a sampler are set, gas is by the pressurization of sampling pump and sampler, thereby detected gas is boosted to the normal operation of sensor scope, and it is, very little to cabin internal pressure variable effect because the rate of air sucked in required of sampling pump is very little.The utility model makes the detected gas pressure build up to the normal operation of sensor scope, has not only solved the gas detection problem of (low-pressure low-temperature environment) under the extreme condition, and has guaranteed carrying out smoothly and accuracy of detection of detection.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is the side view of the utility model hexagonal sampler
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1, the utility model comprises that one is arranged on the airscoop shroud 1 in the hypobaric chamber, and airscoop shroud 1 is a closed box structure, and only the end at airscoop shroud 1 is provided with a sampling catheter 2, enters airscoop shroud 1 for gas in the cabin.One miniwatt self-constant temperature well heater 3 is installed in the airscoop shroud 2, and the other end of airscoop shroud 1 connects a solenoid valve 4, a sampling pump 5 and a hexagonal sampler 6 successively by pipeline, and the pipeline between each parts should shorten as far as possible, lags behind to avoid sampling.Wherein, hexagonal sampler 6 comprises a hexagon cavity 61, all offer a gas outlet on six sides of hexagon cavity 61, and the gas outlet is positioned at all on the same section of hexagonal sampler 6.One sensor 7 all is installed on each gas outlet of hexagonal sampler 6, opens an aperture 8 on hexagonal sampler 6 end caps and communicate, discharge, guarantee that simultaneously gaseous tension approaches atmospheric pressure in the hexagonal sampler 6 for gas sampled with atmosphere.
In the foregoing description, hexagonal sampler 6 is that therefore also can adopt triangular prism, quadrangular or other forms, effect is to satisfy the requirement of multicomponent gas sampling according to the design of the quantity of detected gas.
In the foregoing description, miniwatt self-constant temperature well heater 3 can adopt fin formula electric heating tube, and thermal source adopts the PTC themistor with constant temperature heating function, has the characteristic of oneself's control thermal value.
In the foregoing description, sampling pump 5 can adopt low discharge sampling vacuum pump, because environment is in the low-temp low-pressure state in the hypobaric chamber, for gas in the cabin is drawn out of my cabin, the inlet end of vacuum pump is a negative pressure, and exhaust end is higher than atmospheric pressure.
As shown in Figure 1, principle of work of the present utility model is as follows:
When the utility model uses, at first airscoop shroud 1 is placed in the hypobaric chamber, airscoop shroud 1 is isolated environment in sampler and the cabin.Start sampling pump 5 and solenoid valve 4 then, cryogenic gas enters in the cover by the sampling catheter on the airscoop shroud 12 in the cabin, miniwatt constent temperature heater 3 energising back PTC thermistors heat up and make resistance enter the transition district, heated at constant temperature, the maintenance of thermistor gauge surface temperature is constant, and (this surface temperature is relevant with the Curie temperature of institute's making alive and thermistor, and irrelevant substantially with environment temperature), gas carries out heat interchange by a plurality of aluminium passages of miniwatt constent temperature heater 3, temperature improves (the intensification scope realizes by choosing suitable heater power) but enters hexagonal to sensor 7 normal range of operation to fall in the cavity 61 of sampler 6, i.e. the hexagonal temperature t in the cavity 61 of sampler 6 that fall
1The minimum operating temperature (as-30 ℃) that has been higher than sensor 7.Simultaneously, because the pressurization of sampling pump 5, hexagonal falls cavity 61 internal pressures of sampler 6 by p
2Rise to p
1, because of hexagonal sampler 6 communicates with atmosphere, this moment p
1Approach atmospheric pressure, reach sensor 7 service pressure scopes.By above workflow, sampling, the detection of low-temp low-pressure gas have been realized.
In this course of work,, can ignore the influence of low temperature environment in the cabin because the thermal value of miniwatt constent temperature heater 3 is very little; In like manner, because of the rate of air sucked in required very little (5.5 l/min) of sampling pump 5, very little to cabin internal pressure variable effect.
The utility model only describes with the foregoing description; the structure of each parts, the position is set and connects and all can change to some extent; on the basis of technical solutions of the utility model; all improvement and equivalents of individual component being carried out according to the utility model principle all should not got rid of outside protection domain of the present utility model.
Claims (5)
1. gas sampling device is characterized in that: it comprises that one is arranged on the airscoop shroud in the hypobaric chamber, and described airscoop shroud is the closed box structure, and only the end at described airscoop shroud is provided with a sampling catheter; One well heater is installed in the described airscoop shroud, and the other end of described airscoop shroud connects a solenoid valve, a sampling pump and a sampler successively by pipeline; Described sampler comprises a cavity, all offers a gas outlet on the side of described cavity, and described gas outlet all is positioned on the same section of described sampler; Each of described sampler all is equipped with a sensor on the described gas outlet, opens an aperture on the end cap of described sampler and communicates with atmosphere.
2. a kind of gas sampling device as claimed in claim 1 is characterized in that: the cavity of described sampler adopts triangular prism or quadrangular.
3. a kind of gas sampling device as claimed in claim 1 is characterized in that: described well heater adopts fin formula electric heating tube, and thermal source adopts the PTC themistor with constant temperature heating function.
4. a kind of gas sampling device as claimed in claim 2 is characterized in that: described well heater adopts fin formula electric heating tube, and thermal source adopts the PTC themistor with constant temperature heating function.
5. as claim 1 or 2 or 3 or 4 described a kind of gas sampling devices, it is characterized in that: described sampling pump adopts low discharge sampling vacuum pump, and the inlet end of described vacuum pump is negative pressure, and exhaust end is higher than atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206539094U CN201974317U (en) | 2010-12-10 | 2010-12-10 | Gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206539094U CN201974317U (en) | 2010-12-10 | 2010-12-10 | Gas sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201974317U true CN201974317U (en) | 2011-09-14 |
Family
ID=44579418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206539094U Expired - Fee Related CN201974317U (en) | 2010-12-10 | 2010-12-10 | Gas sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201974317U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721599A (en) * | 2012-05-03 | 2012-10-10 | 北京承天示优科技有限公司 | Heating device for gas sampling |
| CN105339774A (en) * | 2013-06-26 | 2016-02-17 | 玛氏唐森普林有限公司 | Sample conditioning system for low pressure gas |
| CN109799227A (en) * | 2019-03-14 | 2019-05-24 | 北京卫星环境工程研究所 | Vacuum thermal test space capsule gas-sample analysis system and analysis method |
-
2010
- 2010-12-10 CN CN2010206539094U patent/CN201974317U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721599A (en) * | 2012-05-03 | 2012-10-10 | 北京承天示优科技有限公司 | Heating device for gas sampling |
| CN105339774A (en) * | 2013-06-26 | 2016-02-17 | 玛氏唐森普林有限公司 | Sample conditioning system for low pressure gas |
| CN109799227A (en) * | 2019-03-14 | 2019-05-24 | 北京卫星环境工程研究所 | Vacuum thermal test space capsule gas-sample analysis system and analysis method |
| CN109799227B (en) * | 2019-03-14 | 2019-10-08 | 北京卫星环境工程研究所 | Vacuum thermal test space capsule gas-sample analysis system and analysis method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20171210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |