CA1208976A - Apparatus for continuously circulating a liquid - Google Patents
Apparatus for continuously circulating a liquidInfo
- Publication number
- CA1208976A CA1208976A CA000415082A CA415082A CA1208976A CA 1208976 A CA1208976 A CA 1208976A CA 000415082 A CA000415082 A CA 000415082A CA 415082 A CA415082 A CA 415082A CA 1208976 A CA1208976 A CA 1208976A
- Authority
- CA
- Canada
- Prior art keywords
- liquid
- pipe
- separator
- tank
- passage
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1445—Overpressure, pressurisation at sampling point
- G01N2001/1463—Injector; Air-lift
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N2001/2267—Sampling from a flowing stream of gas separating gas from liquid, e.g. bubbles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N2033/0093—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00 radioactive materials
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to an apparatus for continuously circulating a liquid between a storage tank and a container or passage pot in which a sampling or control operation is carried out. The apparatus comprises a pipe making it possible to blow compressed air into a supply pipe connecting the tank to the lower part of a separator, a duct connecting the lower part of this separator to the lower part of the passage pot, a return pipe connecting the upper part of the passage pot to the tank and a pipe connecting the separator to a device making it possible to produce a pressure drop.
Application to taking samples of radioactive liquids for analysis.
The present invention relates to an apparatus for continuously circulating a liquid between a storage tank and a container or passage pot in which a sampling or control operation is carried out. The apparatus comprises a pipe making it possible to blow compressed air into a supply pipe connecting the tank to the lower part of a separator, a duct connecting the lower part of this separator to the lower part of the passage pot, a return pipe connecting the upper part of the passage pot to the tank and a pipe connecting the separator to a device making it possible to produce a pressure drop.
Application to taking samples of radioactive liquids for analysis.
Description
3'7t~
A~PARATUS FOR CONTINUOUSLY CIRCUL~TING A LIQUID.
BACKGROUND OF THE INVENTION.
The present invention relates to an apparatus for continuously circulating a liquid and more specifically for circulating this liquid between a storage tank and a container in which a sampling or control operation is to be carried out.
The main dificulty encountered in liquid sampling apparatus, particularly for analysis purposes, is to obtain a homogeneous and representative sample of the liquid contained in the tank at the sampling point. In most presently used systems, the liquid is circulated be~ween the storage tank and the sampling point, in order to ensure a good homogenization and therefore a good representativeness. Another difficulty to be solved is that of preventing deposits which could form along the walls of the apparatus, because these deposits may be dissolved by another liquid during a subsequent control, thus falsi~ying the results of the measurements. At present, systems called airlifts are frequently used and in these the compressed air is blown into a pipe connecting the storage tank to the sampling point in order to facilitate the circulat-ion of the liqu;d. Although such a system may well ~`~ 25 permit a good homogenization thereof, the presence of air bubbles in the liquid can be prejudicial, particularly in the case where sampling is carried out with the aid of hollow needles on which is perforated a container or jug in which a vacuum has previously been formed.
BRIEF SUMMARY OF THE INVENTION
The present invention relates to an apparatus for continuously circulating a liquid, which obviates the aforementioned disadvantages, but permitting not only a good homogenization o~ the liquid and an effective draining of the installation after sampling, but which also prevents the presence of air ~ubbles in the liquid at the sampling point.
The present invention therefore specifically relates to an apparatus for continuously circulating a liquid between a storage tankand a container or passage pot in which the sampling or control is perormed, wherein it comprises a compressed gas source, a supply pipe connecting the tank to the lower part of a separator positioned above the same, a duct connecting the lower part of the separator to the lower part of the passage pot,the lower par~ of the latter being at a higher leel than the separator, a return pipe connecting the upper part of the passage pot to the tank~ and a pipe, equipped with a splash head, connecting the upper part of the separator to a deviGe making it possible to produce a pressure reduction.
The blowing of compressed air into the pipe connecting thP tank to the separator facilitates the rise of the liquid. The function o ~he device making it possible to produce a pressure drop; which can be a vacuum source or fan, is to eliminate gas present in the liquid at the separator. Thus, ît is perectly degassed liquid which is collected in the lower part of the separator and it then progressively rises up to the
A~PARATUS FOR CONTINUOUSLY CIRCUL~TING A LIQUID.
BACKGROUND OF THE INVENTION.
The present invention relates to an apparatus for continuously circulating a liquid and more specifically for circulating this liquid between a storage tank and a container in which a sampling or control operation is to be carried out.
The main dificulty encountered in liquid sampling apparatus, particularly for analysis purposes, is to obtain a homogeneous and representative sample of the liquid contained in the tank at the sampling point. In most presently used systems, the liquid is circulated be~ween the storage tank and the sampling point, in order to ensure a good homogenization and therefore a good representativeness. Another difficulty to be solved is that of preventing deposits which could form along the walls of the apparatus, because these deposits may be dissolved by another liquid during a subsequent control, thus falsi~ying the results of the measurements. At present, systems called airlifts are frequently used and in these the compressed air is blown into a pipe connecting the storage tank to the sampling point in order to facilitate the circulat-ion of the liqu;d. Although such a system may well ~`~ 25 permit a good homogenization thereof, the presence of air bubbles in the liquid can be prejudicial, particularly in the case where sampling is carried out with the aid of hollow needles on which is perforated a container or jug in which a vacuum has previously been formed.
BRIEF SUMMARY OF THE INVENTION
The present invention relates to an apparatus for continuously circulating a liquid, which obviates the aforementioned disadvantages, but permitting not only a good homogenization o~ the liquid and an effective draining of the installation after sampling, but which also prevents the presence of air ~ubbles in the liquid at the sampling point.
The present invention therefore specifically relates to an apparatus for continuously circulating a liquid between a storage tankand a container or passage pot in which the sampling or control is perormed, wherein it comprises a compressed gas source, a supply pipe connecting the tank to the lower part of a separator positioned above the same, a duct connecting the lower part of the separator to the lower part of the passage pot,the lower par~ of the latter being at a higher leel than the separator, a return pipe connecting the upper part of the passage pot to the tank~ and a pipe, equipped with a splash head, connecting the upper part of the separator to a deviGe making it possible to produce a pressure reduction.
The blowing of compressed air into the pipe connecting thP tank to the separator facilitates the rise of the liquid. The function o ~he device making it possible to produce a pressure drop; which can be a vacuum source or fan, is to eliminate gas present in the liquid at the separator. Thus, ît is perectly degassed liquid which is collected in the lower part of the separator and it then progressively rises up to the
-2-~8~6 passage pot.
According to a first variant of the in~ention, the supply pipe is rQctilinear and is verticalLy immersed in the storage tank. In this case, the com-pressed gas source is connected to a pipe issuinginto the supply pipe at a point above the leveL of the free surface of the liquid in the tank and the device making it possible to produce a pressure drop is a vacuum sourceO
According to another variant, the supply pipe issues into-the lower part of the tank and has a curved portion in this area. In this case, ~he pipe connecting the compressed gas source to the supply pipe issues into the latter at a point beneath the free surace of the liquid in the tank, when the installation is inoperative and the device making it possible to produce a pressure drop is a fan.
Finally, according to another feature of the apparatus according to the invention, it comprises an overflow discharge pipe connecting the upper part of the separator to the return pipe.
BRIEF DESCRIPTION OF THE DRAWINGS.
The invention is described in greater detail hereinafter relative to non-limitativ~ embodiments and the attached drawings, wherein show:
Fig 1 a diagrammatic view of a first constructional variant of an apparatus according to the invention.
Fig 2 a diagrammatic view showing a second variant thereof.
~3-;~Z~9'~i DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In Fig 1, it is possible to see a liquid l contained in a tank 29 which can either be a storage tank or a supply tank connected to a much larger volume reservoir. A first pipe 4, called the supply-pipe, connects the tank 2 to the lower part o a container 6, called a separator, positioned above tank 2 and in which the separation of the liquid a~d the compressed gas takes place. A perforated tube 9, placed within separator 6, acts as a calming device for ~he liquid in order to prevent agitation, which could be prejudicial in passage pot 10, whilst two bubbling rods 15 make it possible to check the presence of the li~uid in the separator, as well as the level thereof.
The lower part of separator 6 is connected by a duct 8 to the lower part of the container 10~ called a passage pot, in which the state of the liquid is checked. It should be noted that the lower part of the passage pot 10 is at a higher level than the lower part o~ separator 6.
Passage pot 10 is equipped with a control device 12~
which either makes it possible to directly control the state of the liquid within passage pot 10, or to carry out a sampling process when the control is perfortned in another installation. A return pipe 11, connected to the upper part of the passage pot lO, connects the latter to tank 2.
It is also possible to see a duct 14, equipped with a splash head 16 and connecting the separator 6 to the vacuum source 17 connected to the upper part of separator 6. Splash head 16 serves to perm;t the separation of the last droplets, which may have been entrained with the gas sucked in by the vacuum source 17. An over10w discharge pipe 7 connects the upper part of separator 6 to return pipe 11 and~consequentl~ to tank 20 The arrangement is such that the ~tarting point of pipe 7 is at a higher level than the starting point of return pipe 11. It is also possible to see a compressed air pipe 3, which links supply pipe 4 with a compressed air source S. In the ~iant of Fig 19 the supply pipe 4 is rectilinear and vertical and enters the upper part of tank 2, whilst the compressed air pipe 3 issues into pipe 4 at a point above the free surface of the liquid in tank 2~
The apparatus according to the invention functions in the following manner. When vacuum source 17 is put into operation, there is a suction effect in supply pipe 4. The liquid in tank 2 then rises along the said pipe to a point below the connection point of the compressed air pipe 3. At this moment, the compressed air is blown into pipe 4 through pipe 3 and, due to the fact that the installation is under vacuum~ the air bubbles immediately rise in pipe 4, entraining therewith the liquid contained in the tank. When the latter reaches the lower part of separator 6 9 the air is discharged through duct 14. As this produces a continuous suction of liquid from tank 2 to separator 6, the level of the liquid in the latter and therefore in pipe $ progressively rises. Thus, as the air i.s removed from the liquid mass at the separator, it is perfectly degassed liqu;d which progressively enters from bottom to top pipe 8 and then ':
passage pot 10. When the level of the liquid in the latter reaches an adequate height, it drops down again into tank 2 through return pipe 11. Thus, there is a continuous circulation of liquid from tank 2 to separator 6 through pipe 4 and then from the separator to the passage pot through pipe 8 and finally from the passage pot to the tank through return pipe 11. This circulation makes it posssible to homogeniæe the liquid level with the control device 12. In addition~ as a result of the presence of separator 6 upstream of the passage pot9 it is a gas-free liquid which passes through the latter) whereby significantly improving the representativeness of the checked samples and consequently sampling is made easier. If 7 for any random reason~ e.g.
an accidental blocking of pipe 11, the liquid level in separator 6 rises in a distur~ing manner, the overflow discharge pipe 7, connected to the upper part thereof, makes it possible to discharge the liquid towards return pipe 11 and from there to tank 2. When the control or 2~ sampling operation is ended, the vacuum source is stopped and the compressed air intake closed. At this time, all the liquid contained in the installation drops down again by gravity into tank 2. In particular, the liquid contained in passage pot 10, drops again through pipe 8 in the direction of the lower part of separator 6 and from there into tank 2 through pipe 4. Particularly as a result of the slope of pipe 8, this arrangement ensures an immediate and total drainage of the installat-ion and cons-nderably reduces the risk of any deposits, which could falsify subsequent measurements.
~q~
In the variant of Fig 2~ it is possible to see that the vacuum source 17 is replaced by a fan 18.
Furthermore, the supply pipe ~ no longer enters the upper part of tank 2~ but instead lssues into the base thereof. In this area, it has a curved portion 4a, which is co~stantly filled with liquid up to a level equal to that of the free surface o the liquid in the tank. The compressed air supply pipe 3 issues into the lower part o pipe 4 at a point which is beneath the free surface of the liqllid~ when the installation is inoperative. When compressed air is passed through pipe 3, the air bubbles immediately entrain the liquid along pipe 4. In this case, the ventilation ensured ~y device 18 only serves to eliminate the air introduced by pipe 3 in order to degas the liquid~ which collects in the lower part o~ separator 6. ~hus, the liquid rises along supply pipe 4 up to he lower part of separa-tor 6, where the air is eliminated. It then rises along pipe 8 according to the mechanism described hereinbefore. When the installation is not operati.ng~
the liquid redescends in pipe 4 to a level corresponding to that of the free surface of the liquid in tan~ 2.
The apparatus according to the invention has numerous advantages, the most important of which is ~o ensure the passage of a homogeneous and completely degassed liquid to the sampling point. Moreover, when the installation is not operating, it ensures a complete and very effective draining, which obviates any risk of deposits, which could falsify subsequent measurements.
Although such an apparatus can be used with ~7 .~^i ~2~ 6 particular interest in installations for taking radioactive liquid samples, particularly those where a hollow needle is used on which is pierced a jug in which a ~acuum has previously been formed, it can also be used in any random sampling installation in which a liquid is circulated and in which it is desired that said liquid is perfectly homogeneous and degassed.
According to a first variant of the in~ention, the supply pipe is rQctilinear and is verticalLy immersed in the storage tank. In this case, the com-pressed gas source is connected to a pipe issuinginto the supply pipe at a point above the leveL of the free surface of the liquid in the tank and the device making it possible to produce a pressure drop is a vacuum sourceO
According to another variant, the supply pipe issues into-the lower part of the tank and has a curved portion in this area. In this case, ~he pipe connecting the compressed gas source to the supply pipe issues into the latter at a point beneath the free surace of the liquid in the tank, when the installation is inoperative and the device making it possible to produce a pressure drop is a fan.
Finally, according to another feature of the apparatus according to the invention, it comprises an overflow discharge pipe connecting the upper part of the separator to the return pipe.
BRIEF DESCRIPTION OF THE DRAWINGS.
The invention is described in greater detail hereinafter relative to non-limitativ~ embodiments and the attached drawings, wherein show:
Fig 1 a diagrammatic view of a first constructional variant of an apparatus according to the invention.
Fig 2 a diagrammatic view showing a second variant thereof.
~3-;~Z~9'~i DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In Fig 1, it is possible to see a liquid l contained in a tank 29 which can either be a storage tank or a supply tank connected to a much larger volume reservoir. A first pipe 4, called the supply-pipe, connects the tank 2 to the lower part o a container 6, called a separator, positioned above tank 2 and in which the separation of the liquid a~d the compressed gas takes place. A perforated tube 9, placed within separator 6, acts as a calming device for ~he liquid in order to prevent agitation, which could be prejudicial in passage pot 10, whilst two bubbling rods 15 make it possible to check the presence of the li~uid in the separator, as well as the level thereof.
The lower part of separator 6 is connected by a duct 8 to the lower part of the container 10~ called a passage pot, in which the state of the liquid is checked. It should be noted that the lower part of the passage pot 10 is at a higher level than the lower part o~ separator 6.
Passage pot 10 is equipped with a control device 12~
which either makes it possible to directly control the state of the liquid within passage pot 10, or to carry out a sampling process when the control is perfortned in another installation. A return pipe 11, connected to the upper part of the passage pot lO, connects the latter to tank 2.
It is also possible to see a duct 14, equipped with a splash head 16 and connecting the separator 6 to the vacuum source 17 connected to the upper part of separator 6. Splash head 16 serves to perm;t the separation of the last droplets, which may have been entrained with the gas sucked in by the vacuum source 17. An over10w discharge pipe 7 connects the upper part of separator 6 to return pipe 11 and~consequentl~ to tank 20 The arrangement is such that the ~tarting point of pipe 7 is at a higher level than the starting point of return pipe 11. It is also possible to see a compressed air pipe 3, which links supply pipe 4 with a compressed air source S. In the ~iant of Fig 19 the supply pipe 4 is rectilinear and vertical and enters the upper part of tank 2, whilst the compressed air pipe 3 issues into pipe 4 at a point above the free surface of the liquid in tank 2~
The apparatus according to the invention functions in the following manner. When vacuum source 17 is put into operation, there is a suction effect in supply pipe 4. The liquid in tank 2 then rises along the said pipe to a point below the connection point of the compressed air pipe 3. At this moment, the compressed air is blown into pipe 4 through pipe 3 and, due to the fact that the installation is under vacuum~ the air bubbles immediately rise in pipe 4, entraining therewith the liquid contained in the tank. When the latter reaches the lower part of separator 6 9 the air is discharged through duct 14. As this produces a continuous suction of liquid from tank 2 to separator 6, the level of the liquid in the latter and therefore in pipe $ progressively rises. Thus, as the air i.s removed from the liquid mass at the separator, it is perfectly degassed liqu;d which progressively enters from bottom to top pipe 8 and then ':
passage pot 10. When the level of the liquid in the latter reaches an adequate height, it drops down again into tank 2 through return pipe 11. Thus, there is a continuous circulation of liquid from tank 2 to separator 6 through pipe 4 and then from the separator to the passage pot through pipe 8 and finally from the passage pot to the tank through return pipe 11. This circulation makes it posssible to homogeniæe the liquid level with the control device 12. In addition~ as a result of the presence of separator 6 upstream of the passage pot9 it is a gas-free liquid which passes through the latter) whereby significantly improving the representativeness of the checked samples and consequently sampling is made easier. If 7 for any random reason~ e.g.
an accidental blocking of pipe 11, the liquid level in separator 6 rises in a distur~ing manner, the overflow discharge pipe 7, connected to the upper part thereof, makes it possible to discharge the liquid towards return pipe 11 and from there to tank 2. When the control or 2~ sampling operation is ended, the vacuum source is stopped and the compressed air intake closed. At this time, all the liquid contained in the installation drops down again by gravity into tank 2. In particular, the liquid contained in passage pot 10, drops again through pipe 8 in the direction of the lower part of separator 6 and from there into tank 2 through pipe 4. Particularly as a result of the slope of pipe 8, this arrangement ensures an immediate and total drainage of the installat-ion and cons-nderably reduces the risk of any deposits, which could falsify subsequent measurements.
~q~
In the variant of Fig 2~ it is possible to see that the vacuum source 17 is replaced by a fan 18.
Furthermore, the supply pipe ~ no longer enters the upper part of tank 2~ but instead lssues into the base thereof. In this area, it has a curved portion 4a, which is co~stantly filled with liquid up to a level equal to that of the free surface o the liquid in the tank. The compressed air supply pipe 3 issues into the lower part o pipe 4 at a point which is beneath the free surface of the liqllid~ when the installation is inoperative. When compressed air is passed through pipe 3, the air bubbles immediately entrain the liquid along pipe 4. In this case, the ventilation ensured ~y device 18 only serves to eliminate the air introduced by pipe 3 in order to degas the liquid~ which collects in the lower part o~ separator 6. ~hus, the liquid rises along supply pipe 4 up to he lower part of separa-tor 6, where the air is eliminated. It then rises along pipe 8 according to the mechanism described hereinbefore. When the installation is not operati.ng~
the liquid redescends in pipe 4 to a level corresponding to that of the free surface of the liquid in tan~ 2.
The apparatus according to the invention has numerous advantages, the most important of which is ~o ensure the passage of a homogeneous and completely degassed liquid to the sampling point. Moreover, when the installation is not operating, it ensures a complete and very effective draining, which obviates any risk of deposits, which could falsify subsequent measurements.
Although such an apparatus can be used with ~7 .~^i ~2~ 6 particular interest in installations for taking radioactive liquid samples, particularly those where a hollow needle is used on which is pierced a jug in which a ~acuum has previously been formed, it can also be used in any random sampling installation in which a liquid is circulated and in which it is desired that said liquid is perfectly homogeneous and degassed.
Claims (4)
1. An apparatus for continuously circulating a liquid between a storage tank and a container or passage pot in which the sampling or control is performed, wherein it comprises a compressed gas source, a supply pipe connecting the tank to the lower part of a separator positioned above the same, a duct connecting the lower part of the separator to the lower part of the passage pot, the lower part of the latter being at a higher level than the separator, a return pipe connecting the upper part of the passage pot to the tank, and a pipe, equipped with a splash head, connecting the upper part of the separator to a device making it possible to produce a pressure reduction.
2. An apparatus according to claim 1, wherein the device making it possible to produce a pressure drop is a vacuum source and wherein the compressed gas source is linked with a pipe issuing into the supply pipe at a level higher than the free surface of the liquid in the tank.
3. An apparatus according to claim 1, wherein the device making it possible to produce a pressure drop is a fan and wherein the compressed gas pipe issues into the supply pipe at a point which is at a lower level than that of the free surface of the liquid in the tank, when the installation is not operating.
4. An apparatus according to claim 1, wherein it comprises an overflow discharge pipe connecting the upper part of the separator to the return pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8121023A FR2516242A1 (en) | 1981-11-10 | 1981-11-10 | SYSTEM FOR THE CONTINUOUS CIRCULATION OF A LIQUID FOR THE TAKING OR CONTROL OF THIS LIQUID |
| FR8121023 | 1981-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1208976A true CA1208976A (en) | 1986-08-05 |
Family
ID=9263864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000415082A Expired CA1208976A (en) | 1981-11-10 | 1982-11-08 | Apparatus for continuously circulating a liquid |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0079283B1 (en) |
| JP (1) | JPS5887443A (en) |
| CA (1) | CA1208976A (en) |
| DE (1) | DE3269463D1 (en) |
| FR (1) | FR2516242A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6666099B2 (en) * | 2001-06-05 | 2003-12-23 | Pason Systems Corp. | Apparatus to recover sample gases from fluids |
| CN104502151A (en) * | 2014-12-31 | 2015-04-08 | 中国市政工程华北设计研究总院有限公司 | Quantitative clear liquid suction device for portable automatic liquid sampler |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8406209D0 (en) * | 1984-03-09 | 1984-05-10 | British Nuclear Fuels Plc | Liquid sampling system |
| JPH0812138B2 (en) * | 1985-11-29 | 1996-02-07 | 株式会社島津製作所 | Automatic gel stainer |
| FR2616487B1 (en) * | 1987-06-12 | 1989-09-08 | Commissariat Energie Atomique | DEVICE FOR THE CONTINUOUS CIRCULATION OF A LIQUID WITH A VIEW TO PERFORMING A SAMPLING OR CONTROL OF THIS LIQUID |
| FR2675902B1 (en) * | 1991-04-23 | 1993-08-20 | Cogema | INSTALLATION FOR COLLECTING FLUID SAMPLES IN A CONFINED AREA. |
| FR2712983B1 (en) * | 1993-11-26 | 1996-01-12 | Cogema | Method for rinsing a device for circulating a liquid in order to take a sample. |
| US5817953A (en) * | 1993-11-26 | 1998-10-06 | Compagnie Generale Des Matieres Nucleaires | Method and apparatus for rinsing a device for circulating a liquid for sampling purposes |
| EP0878700B1 (en) * | 1997-05-16 | 2003-07-30 | Ifremer Institut Francais De Recherche Pour L'exploitation De La Mer | Automatic system for monitoring the quality of a liquid medium, particularly an aquatic medium |
| FR2811240B1 (en) * | 2000-07-05 | 2003-01-03 | Air Liquide | PROCESS FOR DETERMINING THE HYDROGEN PEROXIDE CONTENT OF MIXTURES IN PARTICULAR ABRASIVE MIXTURES USED IN ELECTRONICS AND APPLICATION TO THE REGULATION OF THE CONCENTRATION OF SAID MIXTURES |
| CN105806660A (en) * | 2015-06-07 | 2016-07-27 | 付世权 | Pollution-free and waste-free online automatic sampling device for lubricating oil |
| CN105004572A (en) * | 2015-07-27 | 2015-10-28 | 中国原子能科学研究院 | Automatic quantitative sampling device |
| CN109932217A (en) * | 2019-04-22 | 2019-06-25 | 安徽理工大学 | A kind of metallurgical raw material sampler for sampling |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE559520A (en) * | 1956-08-11 | |||
| SE340191B (en) * | 1969-11-03 | 1971-11-08 | A Lindberg | |
| GB1360346A (en) * | 1973-03-26 | 1974-07-17 | Khan A Q | Sampling device |
| US3834588A (en) * | 1973-07-18 | 1974-09-10 | Beckman Instruments Inc | Sampling apparatus |
| DE2435357A1 (en) * | 1973-07-27 | 1975-02-27 | Kent Ltd G | METHOD AND DEVICE FOR MEASURING PROPERTIES OF A LIQUID WITH A PROPERTY DETECTING CHANGES IN PROPERTIES |
-
1981
- 1981-11-10 FR FR8121023A patent/FR2516242A1/en active Granted
-
1982
- 1982-11-05 DE DE8282402040T patent/DE3269463D1/en not_active Expired
- 1982-11-05 EP EP19820402040 patent/EP0079283B1/en not_active Expired
- 1982-11-08 CA CA000415082A patent/CA1208976A/en not_active Expired
- 1982-11-09 JP JP19540882A patent/JPS5887443A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6666099B2 (en) * | 2001-06-05 | 2003-12-23 | Pason Systems Corp. | Apparatus to recover sample gases from fluids |
| CN104502151A (en) * | 2014-12-31 | 2015-04-08 | 中国市政工程华北设计研究总院有限公司 | Quantitative clear liquid suction device for portable automatic liquid sampler |
| CN104502151B (en) * | 2014-12-31 | 2017-01-04 | 中国市政工程华北设计研究总院有限公司 | The quantitative aspirator of clear liquid of portable automatic liquid sampler |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5887443A (en) | 1983-05-25 |
| DE3269463D1 (en) | 1986-04-03 |
| EP0079283A1 (en) | 1983-05-18 |
| EP0079283B1 (en) | 1986-02-26 |
| JPS6113175B2 (en) | 1986-04-11 |
| FR2516242B1 (en) | 1983-12-23 |
| FR2516242A1 (en) | 1983-05-13 |
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