WO2003076906A1 - Dispositif de dosage d'un dispositif de prelevement d'echantillons - Google Patents

Dispositif de dosage d'un dispositif de prelevement d'echantillons Download PDF

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Publication number
WO2003076906A1
WO2003076906A1 PCT/EP2003/002547 EP0302547W WO03076906A1 WO 2003076906 A1 WO2003076906 A1 WO 2003076906A1 EP 0302547 W EP0302547 W EP 0302547W WO 03076906 A1 WO03076906 A1 WO 03076906A1
Authority
WO
WIPO (PCT)
Prior art keywords
sample
metering
dosing
sample amount
amount
Prior art date
Application number
PCT/EP2003/002547
Other languages
German (de)
English (en)
Other versions
WO2003076906A8 (fr
Inventor
Robert Zeller
Original Assignee
Endress + Hauser Wetzer Gmbh + Co. Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Endress + Hauser Wetzer Gmbh + Co. Kg filed Critical Endress + Hauser Wetzer Gmbh + Co. Kg
Priority to EP03743878A priority Critical patent/EP1483562A1/fr
Priority to AU2003209729A priority patent/AU2003209729A1/en
Publication of WO2003076906A1 publication Critical patent/WO2003076906A1/fr
Publication of WO2003076906A8 publication Critical patent/WO2003076906A8/fr

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
    • G01N1/14—Suction devices, e.g. pumps; Ejector devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
    • G01F11/284—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement combined with electric level detecting means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • 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
    • G01N2001/1418—Depression, aspiration

Definitions

  • the invention relates to a method and a device for dosing a sample amount according to the preamble of claim 1 or 4.
  • Samplers based on the vacuum principle with a pump and a metering device are known from the prior art, the metering device comprising a metering container, a metering tube and a drain pipe with a shut-off device.
  • the metering device is shut off by the shut-off device.
  • the pump is then activated and blows a suction line free via the dosing container, the suction line connecting the dosing container to the sampling point.
  • the pump then sucks a fresh sample into the dosing container via the suction line.
  • the pump is then deactivated again and the excess sample volume flows through the suction line back to the sampling point.
  • the desired sample volume remains in the dosing container, the remaining sample volume depending on the position of the dosing tube.
  • the shut-off device is opened and the desired sample volume is drained into a sample container.
  • the dispensing tube In order to dispense different sample volumes, the dispensing tube has to be moved manually.
  • the object of the invention is to provide a metering device for a sampler with which different sample volumes can be easily set and removed.
  • the main idea of the invention is that a desired sample volume is withdrawn in several steps, in particular in two steps, a freely adjustable sample volume being metered in and withdrawn in a first step, and a predetermined sample volume being metered in and withdrawn in a second step so the sum of the free adjustable and the predetermined sample volume results in the desired sample volume.
  • the first removal step comprises blowing out a suction line and sucking in a fresh sample quantity with a pump, the fresh sample quantity being sucked in until a dosing container is filled, and wherein after the fresh sample quantity has been sucked in, a valve is closed and then the metering and removal of the variable sample amount is carried out by means of an additional conveyor.
  • the second removal step comprises opening the valve and discharging an excess amount of sample via the suction line, the sample amount remaining in the metering container being fixed by the arrangement of a metering tube being removed by the conveying device after the suction line has been removed.
  • the metering device according to the invention for a sampler for metering a predetermined amount of sample comprises a metering container with a metering tube and a shut-off device, the shut-off device being designed as a conveying device, with the conveying device additionally being able to meter out a freely adjustable sample amount, so that a desired amount of sample can be obtained from the sum the fixed sample amount and the freely adjustable sample amount.
  • the device described has the advantage that no manual intervention on the metering device is necessary anymore if different amounts of sample have to be metered with the metering device.
  • the desired additional amount of sample can easily be set via the conveyor, which in an advantageous embodiment of the invention is designed as a flow-proportional conveyor, for example as a metering pump or as a peristaltic pump.
  • the device according to the invention has a conventional pump with high pumping capacity for conveying a sample over the long way from the tapping point to the dosing device has the advantage that the service life of the flow-proportional conveying device is significantly increased since it only has to convey the sample over the short distance from the dosing device into the sample container. The wear on the flow-proportional conveyor is thus reduced and the overall time for sampling is reduced.
  • a conventional metering device with a metering container can be easily retrofitted by designing the shut-off device as a flow-proportional conveying device and expanded into a metering device according to the invention.
  • the metering device comprises a metering container 1, a metering tube 2, a conveying device 3, which acts as a shut-off device when switched off, and a valve 4.
  • FIG. 1 shows the metering device during the first removal step when blowing out an intake line 5 by means of a pump 6, which is designed, for example, as a diaphragm pump, the suction line 5 connecting a removal point 7 to the metering container 1.
  • the valve 4 is open and the conveyor 3 is switched off.
  • the valve 4 is opened and is closed when the maximum filling volume of the metering container 1 has been reached.
  • the pump 6 is switched off.
  • the maximum filling volume is detected via a level limit switch 9.
  • valve 4 is closed and the delivery device 3 activated so that a freely selectable sample quantity is conveyed from the metering container 1 through the conveying device 3 into the sample container 8, the conveying device 3 being designed as a metering pump in the exemplary embodiment shown.
  • the conveying device 3 is switched off and the valve 4 is opened, so that the excess amount of sample flows back into the sampling point 7 via the suction line 5. Only a fixed amount of sample, which is predefined by the arrangement of the metering tube 2, remains in the metering container. This point in time is shown in FIG. 4. These measures are part of the second withdrawal step.
  • Fig. 4 shows the dosing device during the second removal step.
  • the valve 4 is open and the pump 6 is switched off.
  • the dosing container 1 contains the predetermined amount of sample.
  • the conveying device 3 is activated and the predetermined amount of sample additionally reaches the sample container 8 and the dosing process is completed.
  • the sample container 8 there is now the desired amount of sample, which results from the sum of the freely selectable amount of sample and the predetermined amount of sample.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Hydrology & Water Resources (AREA)
  • Fluid Mechanics (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un procédé et un dispositif de dosage d'une quantité d'échantillon. Selon l'invention, on prélève la quantité d'échantillon souhaitée en deux opérations. Une première opération consiste à doser et à prélever une quantité d'échantillon variable librement déterminable. Une deuxième opération de prélèvement consiste à doser et à prélever une quantité d'échantillon prédéfinie. Le dispositif de dosage d'un dispositif de prélèvement d'échantillons permettant de doser une quantité d'échantillon donnée comprend une pompe (6), un contenant de dosage, (1) un tuyau de dosage (2) et un dispositif de d'arrêt. Le dispositif d'arrêt selon l'invention est conçu comme un dispositif de transport (3) et ce dispositif de transport (3) permet de doser une quantité d'échantillon supplémentaire librement réglable.
PCT/EP2003/002547 2002-03-12 2003-03-12 Dispositif de dosage d'un dispositif de prelevement d'echantillons WO2003076906A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03743878A EP1483562A1 (fr) 2002-03-12 2003-03-12 Dispositif de dosage d'un dispositif de prelevement d'echantillons
AU2003209729A AU2003209729A1 (en) 2002-03-12 2003-03-12 Metering device for a sample collector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10210816 2002-03-12
DE10210816.1 2002-03-12

Publications (2)

Publication Number Publication Date
WO2003076906A1 true WO2003076906A1 (fr) 2003-09-18
WO2003076906A8 WO2003076906A8 (fr) 2004-04-15

Family

ID=27797710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/002547 WO2003076906A1 (fr) 2002-03-12 2003-03-12 Dispositif de dosage d'un dispositif de prelevement d'echantillons

Country Status (4)

Country Link
EP (1) EP1483562A1 (fr)
AU (1) AU2003209729A1 (fr)
DE (1) DE10243928A1 (fr)
WO (1) WO2003076906A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103471874A (zh) * 2013-09-29 2013-12-25 国家电网公司 桶装汽轮机油自动定量取样装置
CN104155148A (zh) * 2013-10-21 2014-11-19 浙江大学 吸尘式动力系统的浅海表层取样器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2304755A1 (de) * 1972-03-09 1973-08-09 Singer Probenentnahmevorrichtung fuer fluessigkeiten mit oder ohne feststoffgehalt
US4037472A (en) * 1976-09-16 1977-07-26 Advanced Instrumentation Inc. Explosion-proof flow sampling apparatus
EP0787982A1 (fr) * 1996-02-03 1997-08-06 Montec International Limited Echantillonage de liquide
EP0978716A1 (fr) * 1998-08-01 2000-02-09 ENDRESS + HAUSER WETZER GmbH + Co. KG Dispositif et procédé pour le prélèvement d'un volume prédéterminé d'un échantillon d'un milieu
EP1059519A1 (fr) * 1999-06-10 2000-12-13 Endress + Hauser Wetzer GmbH + Co. KG Echantilleur et procédé pour remplir et refroidir un fluide
DE10008623A1 (de) * 2000-02-24 2001-08-30 Walz Karl Heinz Pneumatisches Probenahmesystem mit automatisch einstellbarer Dosiermenge

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083252A (en) * 1977-07-25 1978-04-11 Lawrence Lynn Stookey Flow proportional liquid sampler
DE8414249U1 (de) * 1984-05-10 1985-07-04 Jansky Milchsammelwagen- und Apparatebau GmbH, 4407 Emsdetten Probeentnahmevorrichtung
DE8528090U1 (de) * 1985-10-02 1988-10-27 Jansky Milchsammelwagen- und Apparatebau GmbH, 4407 Emsdetten Vorrichtung zum Erstellen einer für ein Milchvolumen repräsentativen Milchprobe
DE8808850U1 (de) * 1987-12-18 1988-09-22 HLW Fahrzeugbau- und Wartungsdienst GmbH, 4418 Nordwalde Vorrichtung zur Gewinnung einer für eine variable Milchmenge repräsentativen Milchprobe
US4873876A (en) * 1988-11-07 1989-10-17 Ethylene Corp. Chemical process sampler
DE9201647U1 (de) * 1992-02-11 1992-06-04 Kochsiek, Werner, 4920 Lemgo Milchprobenvordosierung für Milchsammelfahrzeuge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2304755A1 (de) * 1972-03-09 1973-08-09 Singer Probenentnahmevorrichtung fuer fluessigkeiten mit oder ohne feststoffgehalt
US4037472A (en) * 1976-09-16 1977-07-26 Advanced Instrumentation Inc. Explosion-proof flow sampling apparatus
EP0787982A1 (fr) * 1996-02-03 1997-08-06 Montec International Limited Echantillonage de liquide
EP0978716A1 (fr) * 1998-08-01 2000-02-09 ENDRESS + HAUSER WETZER GmbH + Co. KG Dispositif et procédé pour le prélèvement d'un volume prédéterminé d'un échantillon d'un milieu
EP1059519A1 (fr) * 1999-06-10 2000-12-13 Endress + Hauser Wetzer GmbH + Co. KG Echantilleur et procédé pour remplir et refroidir un fluide
DE10008623A1 (de) * 2000-02-24 2001-08-30 Walz Karl Heinz Pneumatisches Probenahmesystem mit automatisch einstellbarer Dosiermenge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103471874A (zh) * 2013-09-29 2013-12-25 国家电网公司 桶装汽轮机油自动定量取样装置
CN104155148A (zh) * 2013-10-21 2014-11-19 浙江大学 吸尘式动力系统的浅海表层取样器

Also Published As

Publication number Publication date
EP1483562A1 (fr) 2004-12-08
WO2003076906A8 (fr) 2004-04-15
DE10243928A1 (de) 2003-10-02
AU2003209729A1 (en) 2003-09-22
AU2003209729A8 (en) 2003-09-22

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