[go: up one dir, main page]

WO1988007667A1 - Procede et appareil de prelevement d'un echantillon a partir d'un fluide s'ecoulant dans un conduit - Google Patents

Procede et appareil de prelevement d'un echantillon a partir d'un fluide s'ecoulant dans un conduit Download PDF

Info

Publication number
WO1988007667A1
WO1988007667A1 PCT/DK1988/000048 DK8800048W WO8807667A1 WO 1988007667 A1 WO1988007667 A1 WO 1988007667A1 DK 8800048 W DK8800048 W DK 8800048W WO 8807667 A1 WO8807667 A1 WO 8807667A1
Authority
WO
WIPO (PCT)
Prior art keywords
conduit
fluid
sample
container
fluid flow
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.)
Ceased
Application number
PCT/DK1988/000048
Other languages
English (en)
Inventor
Ryan Rosenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1988007667A1 publication Critical patent/WO1988007667A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
    • G01N1/2035—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping
    • 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
    • G01N33/02—Food
    • G01N33/04—Dairy products

Definitions

  • This invention relates to a method of taking and collecting a representative sample having a relatively small, predetermined volume from a fluid flowing through a conduit and from which a portion larger than the predetermined sample volume is diverted during the sampling course, the excess of the portion compared to said volume being withdrawn so as not to be collected in the container adapted to receive the sample.
  • Such a method of sampling is for instance practised in connection with tapping milk from suppliers by tank cars, the analyses on the samples forming inter alia the basis of settling the accounts with respect to the quantity of the purveyed milk.
  • the constituents may be expected to be uniformly dispersed so that any portion is identically composed. In this respect a spot test may reasonably be considered to be representative of the total quantity. If the milk has not been kept stirred, a representative sample of e.g.
  • 30 to 50 ml taken from a delivered amount of 100 to 10000 l may be obtained in the way that during pumping from supplier's tank to the tank car a liquid amount proportionate to the main fluid flow is diverted to the sample container, the operator being capable of adjusting the factor of proportionality from a reasonably exact estimate of the total amount of milk and the magnitude of the desired sample.
  • the over-dragging is due to the fact that the tank car in the same turn fetches milk from more or many suppliers and that the milk residues from one delivery may cause a falsification of the sample taken from the following delivery, unless a thorough cleaning and rinsing of the equipments (including the intermediate store) is effected between two deliveries which, however, will cause great difficulty in practice.
  • the method according to the invention differs from the last mentioned, prior method in that said portion is conducted directly from the conduit to the sample container and that the fluid amount therein after the predetermined volume has been attained is kept constant by continuous supply of fluid to and withdrawal of fluid from the sample container, the fluid flow to and from the container at any moment being proportional to the product of the predetermined volume and the simultaneous fluid flow in the conduit and inversely proportional to the fluid amount which until the specific moment has flown through the conduit. It should be ensured that the fluid withdrawn from the sample container may at any time be held to have the same composition as the total content of the sample container in order that this content may continuously be representative of the main quantity.
  • the obtaining of a representative sample requires neither pre-knowledge of the total amount from which the sample is to be taken nor is there any need for an intermediate store from which a sample is to be taken at a suitable moment.
  • the method implies that a proportional sample is taken at first till a predetermined volume has been attained, following which the continuous supply and discharge of sample fluid while observing the determined fluid flow cause such a regulation or updating of the original proportional sample that the sample will continuously be representative of the fluid amount that has flown through the conduit at the diversion point and, at the termination of the sampling course, will actually be representative of the total amount of fluid, for example the amount of milk transferred from a supplier to a tank car.
  • the invention also relates to an apparatus for carrying out the explained method, said apparatus comprising, in a known manner, a fluid flow conduit and a samples receiving container.
  • a fluid flow conduit communicates with the conduit through a fluid flow controlling pump and includes an outlet for discharging fluid in an amount of the same magnitude as the supplied one.
  • the outlet may be a simple overflow, but it is generally preferred that the outlet of the samples receiving container is in communication with the conduit over a likewise adjustable pump, inter alia because losses in fluid may then be eliminated.
  • the invention is illustrated in the drawing by a schematical view of the apparatus concerned.
  • the apparatus of the illustrated embodiment includes a conduit 1 which in the direction of the marked arrow is through-flown by a fluid from a store, not shown, for example a milk storing tank on a farm, to a collecting tank 2 or other recipient.
  • 3 is a samples receiving container adapted to accommodate a predetermined volume of fluid till a level 4 is reached and in which a level sensor 5 is provided.
  • the container 3 is in communication with the conduit 1 through an inlet tube 6 provided with an adjustable pump 7 and in the illustrated embodiment it is further connected with the conduit 1 through a discharge pipe 8 having a pump 9 which after the level 4 has been reached operates with the same capacity as the pump 7.
  • the mode of effect of the apparatus appears from the above explantion and it will be understood that the level sensor 5 according to requirement may serve as signaller for controlling the pumps 7 and 9.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Food Science & Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Medicinal Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

Lorsqu'il s'agit de prélever et de recueillir un échantillon représentatif de volume prédéterminé relativement petit à partir d'un fluide s'écoulant dans un conduit (1), on en dévie du conduit une partie durant l'opération d'échantillonnage et on conduit cette partie directement depuis le conduit vers un récipient (3) pour échantillons, dans lequel, après qu'on ait obtenu le volume prédéterminé, on maintient constante la quantité de fluide en retirant à un moment spécifique d'écoulement du fluide exactement autant de fluide que ce qui est acheminé vers le conduit, le fluide retiré étant de préférence réacheminé vers l'écoulement de fluide principal. Un appareil permettant de réaliser ledit procédé comprend un conduit d'écoulement de fluide (1) et un récipient (3) collecteur d'échantillons qui communique avec le conduit par l'intermédiaire d'une pompe (7) de régulation d'écoulement de fluide et qui comporte une sortie (8) servant à déverser une quantité de fluide égale à la quantité acheminée.
PCT/DK1988/000048 1987-03-26 1988-03-23 Procede et appareil de prelevement d'un echantillon a partir d'un fluide s'ecoulant dans un conduit Ceased WO1988007667A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK155887A DK155887A (da) 1987-03-26 1987-03-26 Fremgangsmaade og apparatur til udtagning af en proeve fra en gennem en ledning stroemmende vaeskemaengde.
DK1558/87 1987-03-26

Publications (1)

Publication Number Publication Date
WO1988007667A1 true WO1988007667A1 (fr) 1988-10-06

Family

ID=8106050

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1988/000048 Ceased WO1988007667A1 (fr) 1987-03-26 1988-03-23 Procede et appareil de prelevement d'un echantillon a partir d'un fluide s'ecoulant dans un conduit

Country Status (2)

Country Link
DK (1) DK155887A (fr)
WO (1) WO1988007667A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231658A (en) * 1989-04-13 1990-11-21 Afikim S A E Liquid sampling apparatus
WO2004111613A3 (fr) * 2003-06-13 2005-03-24 The Technology Partnership Plc Elements d'echantillonnage de fluides
GB2564180A (en) * 2017-03-06 2019-01-09 Fullwood Ltd Improvements relating to sampling apparatus
CN112325961A (zh) * 2020-11-16 2021-02-05 湖北省农业科学院植保土肥研究所 一种径流流量监测与取样装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6444788B1 (en) 1999-03-15 2002-09-03 Novo Nordisk A/S Ion exchange chromatography of GLP-1, analogs and derivatives thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK86749C (da) * 1956-07-30 1959-01-12 Peter Skjoede Knudsen Apparat til udtagning af væskeprøver.
US3896673A (en) * 1972-05-29 1975-07-29 Bernard Audouze Continuous automatic liquid sampler
DE2833836A1 (de) * 1977-08-08 1979-02-22 Mkt Tehtaat Oy Probenahmeapparatur
EP0039668A1 (fr) * 1980-05-06 1981-11-11 Process-Instrument i Krokom AB Dispositif pour la dérivation d'une fraction du débit d'une conduite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK86749C (da) * 1956-07-30 1959-01-12 Peter Skjoede Knudsen Apparat til udtagning af væskeprøver.
US3896673A (en) * 1972-05-29 1975-07-29 Bernard Audouze Continuous automatic liquid sampler
DE2833836A1 (de) * 1977-08-08 1979-02-22 Mkt Tehtaat Oy Probenahmeapparatur
EP0039668A1 (fr) * 1980-05-06 1981-11-11 Process-Instrument i Krokom AB Dispositif pour la dérivation d'une fraction du débit d'une conduite

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231658A (en) * 1989-04-13 1990-11-21 Afikim S A E Liquid sampling apparatus
WO2004111613A3 (fr) * 2003-06-13 2005-03-24 The Technology Partnership Plc Elements d'echantillonnage de fluides
GB2564180A (en) * 2017-03-06 2019-01-09 Fullwood Ltd Improvements relating to sampling apparatus
GB2564180B (en) * 2017-03-06 2023-01-25 Fullwood Ltd Improvements relating to sampling apparatus
CN112325961A (zh) * 2020-11-16 2021-02-05 湖北省农业科学院植保土肥研究所 一种径流流量监测与取样装置

Also Published As

Publication number Publication date
DK155887A (da) 1988-09-27
DK155887D0 (da) 1987-03-26

Similar Documents

Publication Publication Date Title
CA1204982A (fr) Systeme de decharge
US4648043A (en) Computerized system for feeding chemicals into water treatment system
DE69317892T2 (de) Messgerat zum messen der menge einer fliessenden flussigkeit
JP2001508517A (ja) 液体輸送システム
GB2147483A (en) An agricultural apparatus for the metered discharge of liquids
GB1380544A (en) Automatic liquid sampler
US4720998A (en) Crude oil sampling system
EP0098966A3 (fr) Dispositif pour la prise d'échantillons de lait
DE10017379C2 (de) Vorrichtung und Verfahren zur Förderung eines Mediums
EP0078828B1 (fr) Dispositif d'echantillonnage de liquide
WO1988007667A1 (fr) Procede et appareil de prelevement d'un echantillon a partir d'un fluide s'ecoulant dans un conduit
US3901653A (en) Liquid sampling device
US4735779A (en) Method for testing the viscosity of synthetic resins and apparatus for the implementation of the method
DE3502858A1 (de) Vorrichtung fuer die entnahme von milchproben
DE69324275T2 (de) Durchfluss- und volumengeregelte tankreinigungsvorrichtung
US4022066A (en) Apparatus for removing liquid samples
US4708023A (en) Sample handling apparatus
GB2042471A (en) Sampling non-homogenous liquids
EP0047533A1 (fr) Dispositif pour prendre des échantillons de liquides
DE4438434C1 (de) Vorrichtung zur Entnahme einer Probe in einer Milchsammelanlage
GB2231658A (en) Liquid sampling apparatus
SE461684B (sv) Saett och anordning foer provtagning av mjoelk
CN210021281U (zh) 一种用于浓密机的溢流控制系统
EP1254595A2 (fr) Système d'échantillonage pour un liquide
GB2285037A (en) Milk sampling apparatus

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE