DK144542B - Method and apparatus for measuring a liquid flow - Google Patents

Method and apparatus for measuring a liquid flow Download PDF

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DK144542B
DK144542B DK466379A DK466379A DK144542B DK 144542 B DK144542 B DK 144542B DK 466379 A DK466379 A DK 466379A DK 466379 A DK466379 A DK 466379A DK 144542 B DK144542 B DK 144542B
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measuring chamber
liquid
valve
outlet
inlet
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DK466379A
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Danish (da)
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DK144542C (en
DK466379A (en
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H G Olrik
P Salling
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Foss Electric N A S
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Description

144542144542

Den foreliggende opfindelse angår en fremgangsmåde til måling af en væskestrøm, der føres gennem en indløbskanal og ind i et målekammer, der indeholder en svømmer, medens væsken portionsvis udtømmes fra målekammeret gennem en udløbskanal, idet udtømningen 5 af hver portion igangsættes som svar på bevægelse af svømmeren til et øvre niveau, ligesom antallet af portioner, der udtømmes, tælles.The present invention relates to a method for measuring a flow of liquid which is passed through an inlet channel and into a measuring chamber containing a swimmer, while the liquid is discharged portionwise from the measuring chamber through an outlet channel, the discharge 5 of each portion being initiated in response to movement of the swimmer to an upper level, just as the number of portions being discharged is counted.

USA patentskrift nr. 4,030,356 omhandler en kontinuerlig veje-mekanisme, hvor den væskestrøm, der skal vejes, tilføres en væs-10 kemodtager omfattende to væskeoptagende skåle, der er monteret på en fælles vippeaksel. Når den ene skål er blevet fyldt med væske, drejes akselen, hvorved den anden skål føres til en væskefyldningsstilling, medens den anden skål tømmes. Massen af den væske, der er blevet ført til væskemodtageren, beregnes på basis 15 af antallet af de vippebevægelser, der registreres af et elektrisk kredsløb. Dette kendte apparats målenøjagtighed er imidlertid mindre tilfredsstillende, når den væskestrøm, der måles, varierer, fordi en varierende væskestrøm bevirker, at de vippende væskeoptagende skåle vil blive påvirket af forskellige inertikræfter.U.S. Patent No. 4,030,356 discloses a continuous weighing mechanism in which the liquid stream to be weighed is fed to a liquid chemistry receiver comprising two liquid-receiving bowls mounted on a common rocker shaft. When one bowl has been filled with liquid, the shaft is rotated, bringing the other bowl to a liquid filling position while emptying the other bowl. The mass of the liquid that has been fed to the liquid receiver is calculated on the basis of the number of tilting movements recorded by an electrical circuit. However, the measurement accuracy of this known apparatus is less satisfactory when the fluid flow being measured varies because a varying fluid flow causes the tilting liquid receiving bowls to be affected by different inertia forces.

20 USA patentskrifterne nr. 2,853,877 og 3,937,083 og engelsk patentskrift nr. 1,089,159 omhandler væskemåleindretninger med et målekammer, i hvilket der er anbragt en svømmer. Målekammeret har et indløb og et udløb, der er forsynet med henholdsvis en 25 indløbs- og en udløbs ven til. Den væske, der skal måles, føres ind i målekammeret gennem indløbet, medens udløbet lukkes af udløbsventilen. Når den væske, der tilføres målekammeret, har bevæget svømmeren til et øvre niveau, bringer svømmeren indløbsventilen til at lukke og udløbsventilen til at åbne, så at væsken kan strømme 30 ud af målekammeret gennem udløbet under indflydelse af væskens egen tyngde. Når svømmeren har bevæget sig nedefter til et nedre niveau, lukkes udløbs ventilen, medens indløbs ventilen er åben, og den netop beskrevne funktion gentages derefter. Som følge af, at væsken udtømmes fra målekammeret gennem udløbsventilen udelukkende under 35 indflydelse af sin egen vægt, er kapaciteten for de ovenfor beskrevne måleapparater ret begrænset.US Patent Nos. 2,853,877 and 3,937,083 and English Patent Nos. 1,089,159 disclose liquid measuring devices having a measuring chamber in which a float is arranged. The measuring chamber has an inlet and outlet provided with a 25 inlet and an outlet friend respectively. The liquid to be measured is fed into the measuring chamber through the inlet while the outlet is closed by the outlet valve. When the liquid supplied to the measuring chamber has moved the swimmer to an upper level, the swimmer causes the inlet valve to close and the outlet valve to open so that the liquid can flow 30 out of the measuring chamber through the outlet under the influence of the liquid's own weight. When the float has moved downwards to a lower level, the outlet valve is closed while the inlet valve is open and the function just described is then repeated. As the liquid is discharged from the measuring chamber through the outlet valve solely under the influence of its own weight, the capacity of the measuring devices described above is rather limited.

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Fremgangsmåden ifølge opfindelsen er ejendommelig ved, at udtømningen af hver portion forårsages ved, at indløbskanalen lukkes, og at målekammeret udsættes for et gastryk, der væsentligt overstiger trykket ved udløbskanalens udløbsende.The method according to the invention is characterized in that the discharge of each portion is caused by closing the inlet duct and subjecting the measuring chamber to a gas pressure which substantially exceeds the pressure at the outlet end of the outlet duct.

55

Som følge af den trykforskel, der frembringes mellem målekammeret og udløbskanalens udløbsende, kan udtømningsoperationen fremskyndes, og det gastryk, der tilføres målekammeret, kan som forklaret i det følgende anvendes til andre formål.Due to the pressure difference produced between the measuring chamber and the outlet end of the outlet duct, the discharge operation can be accelerated and the gas pressure supplied to the measuring chamber can be used for other purposes as explained below.

1010

Hvis udløbskanalens udløbsende er i forbindelse med atmosfæren, kan trykforskellen under udtømningsoperationen opnås ved, at man fører trykluft eller trykgas til målekammeret. Ved en foretrukken udførelsesform for fremgangsmåden ifølge opfindelsen står udløbskanalens ud-15 løbsende imidlertid under vakuum, og dette gælder også målekammeret, medens væsken føres ind i målekammeret gennem dettes indløb, og udtømningsoperationen kan da forårsages ved, at målekammeret udsættes for atmosfæretryk. En indløb s ventil, der er anbragt i indløbskanalen, og/eller tilførslen af gastryk til målekammeret, kan styres af svømme-20 rens stilling i målekammeret. Således kan gastryktilførslen påbegyndes, og indløbs ventilen kan lukkes, når svømmeren når en øvre stilling i målekammeret.If the outlet end of the outlet duct is in contact with the atmosphere, the pressure difference during the discharge operation can be obtained by supplying compressed air or compressed gas to the measuring chamber. However, in a preferred embodiment of the method according to the invention, the outlet end of the outlet duct is under vacuum, and this also applies to the measuring chamber while the liquid is introduced into the measuring chamber through its inlet, and the discharge operation can then be caused by exposure of the measuring chamber to atmospheric pressure. An inlet s valve located in the inlet duct and / or the supply of gas pressure to the measuring chamber can be controlled by the position of the float in the measuring chamber. Thus, the gas pressure supply can be started and the inlet valve can be closed when the swimmer reaches an upper position in the measuring chamber.

Når indløbskanalen styres af en indløbsventil, der er bevægelig 25 mellem en åbne- og en lukkestiUing, kan indløbs ventilen bevæges til sin lukkede stilling under indflydelse af det gastryk, der tilføres målekammeret.When the inlet duct is controlled by an inlet valve which is movable between an opening and a closing position, the inlet valve can be moved to its closed position under the influence of the gas pressure applied to the measuring chamber.

Når fremgangsmåden ifølge opfindelsen anvendes til måling af en 30 strøm af mælk eller en anden væske, der er tilbøjelig til at skumme, kan skumdannelsen inde i målekammeret forårsage en vis måleunøj-agtighed. Man ønsker derfor at undertrykke og formindske skumdannelsen i målekammeret i størst mulig udstrækning. Indløbskanalen kan således indeholde skumadskillende eller -reducerende organer.When the method of the invention is used to measure a flow of milk or other liquid that is prone to foaming, the foaming inside the measuring chamber can cause some measurement inaccuracy. Therefore, it is desirable to suppress and reduce foam formation in the measuring chamber to the greatest extent possible. Thus, the inlet duct may contain foam separating or reducing means.

35 Endvidere kan hver væskeudtømning fra målekammeret omfatte et indledende skumreducerende trin. Således kan tilførslen af gastryk til målekammeret påbegyndes, når svømmeren er blevet bevæget opefter til et første niveau, og væsken kan derefter indledningsvis 3 U4542 udtømmes fra målekammeret gennem en lille omløbsåbning, der står i forbindelse med væskeindløbskanalen, medens udløbskanalen er lukket, f.eks. ved hjælp af en passende ventil, anbragt i denne.Furthermore, each liquid discharge from the measuring chamber may comprise an initial foam reducing step. Thus, the supply of gas pressure to the measuring chamber can be started when the swimmer has been moved upwards to a first level, and the liquid can then initially be discharged from the measuring chamber through a small orifice opening which communicates with the liquid inlet channel while the outlet channel is closed, e.g. . by means of a suitable valve, placed therein.

Når der gennem omløbsåbningen er blevet udtømt en vis mindre 5 væskemængde, så at svømmeren har nået et nedre andet niveau, der ligger noget under det første niveau, ved hvilket tilførslen af gastryk til målekammeret påbegyndes, åbnes udløbsventilen, og den væskedel, der er tilbage i målekammeret, og som i hovedsagen ikke indbefatter skum, udtømmes så gennem udløbskanalen. Som følge af 10 undertrykkelsen af skum i målekammeret og som følge af, at svømmeren bevæger sig meget langsomt nedefter fra det nævnte første til det nævnte andet, lidt lavere niveau, kan dette andet niveau bestemmes med stor nøjagtighed, så at vægten eller massen af de væskeportioner, der udtømmes gennem udløbskanalen, vil blive næsten identiske, 15 hvorved der opnås en stor målenøjagtighed.When a certain amount of liquid has been discharged through the orifice opening so that the swimmer has reached a lower second level which is somewhat below the first level at which the supply of gas pressure to the measuring chamber is started, the outlet valve is opened and the liquid part remaining in the measuring chamber, and which generally does not include foam, is then discharged through the outlet duct. Due to the suppression of foam in the measuring chamber and due to the swimmer moving very slowly downward from said first to said second, slightly lower level, this second level can be determined with great accuracy so that the weight or mass of the liquid portions discharged through the outlet channel will become nearly identical, thereby achieving a high measurement accuracy.

Når en væskestrøm, der måles, standser, kan den væske, der er til stede i målekammeret, komme til at udgøre en brøkdel af den væskeportion, der normalt udtømmes fra målekammeret. Svømmeren 20 vil således ikke nå op på det niveau, ved hvilket væskeudtømningen igangsættes. Udtømningen af en sådan sidste brøkdel kan derfor igangsættes manuelt, og mængden eller vægten af denne sidste brøkdel af en væskeportion kan bestemmes på basis af den tid, der anvendes til udtømning af denne delportion gennem omløbsåbningen. Da udtøm-25 ningen finder sted gennem den snævre omløbsåbning, vil man opnå en forholdsvis lang udtømningsperiode og følgelig en forøget målenøjagtighed.When a liquid flow being measured stops, the liquid present in the measuring chamber may constitute a fraction of the liquid portion normally discharged from the measuring chamber. Thus, the float 20 will not reach the level at which the liquid discharge is initiated. The depletion of such a last fraction can therefore be initiated manually and the amount or weight of this last fraction of a liquid portion can be determined on the basis of the time used to discharge this partial portion through the orifice opening. As the depletion takes place through the narrow orifice opening, a relatively long depletion period and consequently an increased measurement accuracy will be achieved.

Fremgangsmåden ifølge opfindelsen kan f.eks. anvendes til måling 30 af mælk, der strømmer fra en malkemaskines pattekopper. Væsentlige variationer i vakuummet ved en malkemaskines pattekopper kan have en uheldig indflydelse på mælkeydelsen af de køer, der malkes.The method according to the invention can e.g. used for measuring 30 of milk flowing from a milking machine's teat cups. Significant variations in the vacuum of a milking machine's teat cups can have an adverse effect on the milk performance of the cows being milked.

Hvis der i ledningerne mellem malkeanlæggets vakuumledning og pattekopperne optræder sammenhængende mælkesøjler, kan disse 35 forårsage sådanne variationer i vakuummet, og for at undgå dannelsen af sådanne mælkesøjler findes der normalt ved pattekoppeme en luftåbning til indsugning af "falsk luft". Som forklaret ovenfor 14/4542 4 undertrykkes eller reduceres skumdannelsen fortrinsvis, før væsken eller mælken føres ind i milekammeret, hvilket betyder, at luft, der er medført af væsken, adskilles fra denne. For at undgå dannelsen af sammenhængende væskesøjler efter målekammeret kan der 5 blandes luft i den mælk, der udtømmes fra dette.If there are continuous milk columns in the lines between the milk system's vacuum line and the teat cups, these can cause such variations in the vacuum, and to avoid the formation of such milk columns there is usually an air opening for sucking "false air" at the teat cups. As explained above 14/4542 4, foam formation is preferably suppressed or reduced before the liquid or milk is introduced into the mileage chamber, which means that air entrained by the liquid is separated from it. In order to avoid the formation of cohesive liquid columns after the measuring chamber, 5 air can be mixed in the milk discharged therefrom.

Ved opfindelsen er der også blevet tilvejebragt et apparat til måling af en væskestrøm og med et målekammer, der har en væskeindløbskanal til modtagelse af denne strøm, en svømmer, der er bevæ-10 geligt anbragt i dette kammer, udtømningsorganer til udtømning af væske fra målekammeret gennem en væskeudløbskanal som svar på bevægelse af svømmeren til et øvre niveau og organer til at tælle antallet af væskeportioner, der udtømmes fra målekammeret, og apparatet ifølge opfindelsen er ejendommeligt ved, at udtømningsor-15 ganerne omfatter organer til lukning af indløbskanalen og organer til at udsætte målekammeret for et gastryk, der væsentligt overstiger trykket ved udløbskanalens udløbsende.The invention also provides an apparatus for measuring a fluid flow and with a measuring chamber having a liquid inlet channel for receiving this flow, a float movably arranged in this chamber, discharge means for discharging liquid from the measuring chamber through a liquid outlet channel in response to movement of the float to an upper level and means for counting the number of liquid portions discharged from the measuring chamber, and the apparatus of the invention is peculiar in that the discharge means comprise means for closing the inlet channel and means for exposing the measuring chamber to a gas pressure which substantially exceeds the pressure at the outlet end of the outlet duct.

Opfindelsen vil i det følgende blive nærmere beskrevet under hen-20 visning til tegningen, på hvilken fig. 1 - 3 er skematiske snit i en udførelsesform for apparatet ifølge opfindelsen, idet apparatets dele er vist ved forskellige trin af appa-ratets funktion, fig. 4 er et skematisk snit i en anden udførelsesform for apparatet 25 ifølge opfindelsen, fig. 5 viser en tredje udførelsesform for apparatet ifølge opfindel sen i større målestok set fra siden og delvis i snit efter linjen V-V i fig. 7, fig. 6 er et snit efter linjen VI-VI i fig. 7 i det i fig. 5 viste 20 apparat, fig. 7 er et tværsnit efter linjen VII-VII i fig. 5, fig. 8 er et ophængningsorgan til bevægelig ophængning af apparatets flydeorganer, fig. 9 er endnu en udførelsesform for ophængningsorganet, 25 fig. 10 er et delsnit i det i fig. 5 viste apparat, hvor man ser et reedrelæ og en dermed samarbejdende relæaktiverende magnet, fig. 11 er en fjerde udførelsesform for apparatet ifølge opfindel- 144542 5 sen set fra siden og delvis i snit, fig. 12 er et delsnit i det i fig. 11 viste apparat, hvor man ser en kon traven til, fig. 13 er et snit i en gasventilindretning i større målestok, og 5 fig. 14 er set fra siden og delvis i snit en detalje, der illustrerer en modifikation af det i fig. 11 viste apparat.The invention will now be described in more detail with reference to the drawing, in which 1 - 3 are schematic sections in one embodiment of the apparatus according to the invention, the parts of the apparatus being shown at various stages of the operation of the apparatus; Figure 4 is a schematic sectional view of another embodiment of the apparatus 25 according to the invention; 5 is a side view of a third embodiment of the apparatus according to the invention, partly in section along the line V-V in FIG. 7, FIG. 6 is a sectional view taken along line VI-VI of FIG. 7 in the embodiment of FIG. 5, FIG. 7 is a cross section along line VII-VII of FIG. 5, FIG. 8 is a suspension means for movably suspending the float means of the apparatus; FIG. 9 is yet another embodiment of the suspension means; FIG. 10 is a partial sectional view of FIG. 5 shows a reed relay and a cooperating relay activating magnet, FIG. 11 is a side view of a fourth embodiment of the apparatus according to the invention and partly in section; FIG. 12 is a partial sectional view of FIG. 11, where a cone is to be seen; FIG. 13 is a sectional view of a gas valve assembly on a larger scale; and FIG. 14 is a side view, partly in section, of a detail illustrating a modification of the one shown in FIG. 11.

' De på tegningen viste måleapparater er indrettet til måling af massen eller vægten af en mælkestrøm, der passerer gennem et malkeanlægs 10 slanger eller ledninger. Således kan de viste apparater eksempelvis indskydes mellem et sæt pattekopper og malkeanlæggets transportledning, i hvilken der på kendt måde frembringes vakuum.The measuring devices shown in the drawing are adapted for measuring the mass or weight of a milk flow passing through the hoses or conduits of a milking plant 10. Thus, for example, the apparatus shown can be inserted between a set of teat cups and the transport line of the milking plant, in which vacuum is known in the known manner.

Det i fig. 1-3 viste apparat har et hus 10 med en væskeindløb s -15 ledning eller -kanal 11, der er forbundet med husets øverste del.The FIG. 1-3 shows a housing 10 having a liquid inlet s -15 conduit or channel 11 connected to the upper part of the housing.

Når dette apparat anvendes til måling af en malkekos mælkeydelse, kan væskeindløbsledningen forbindes med de pattekopper, der anvendes til malkning af koen. Den nederste del af huset 10 er forbundet med en væskeudløbsledning eller -kanal 12, der strækker sig 20 opefter til en beholder 13 eller en beholderlignende udvidelse på en vakuumledning 14, der står i forbindelse med malkeanlæggets mælketransportledning (ikke-vist) sammen med den øverste del af huset 10. Et rørformet eller klokkeformet ventillegeme 15, der er anbragt lodret bevægeligt i huset 10, har en eftergivelig nederste 25 randdel 16, der er indrettet til at samarbejde med og tæt indgribe med et nedadvendende ringformet ventilsæde 17 i huset 10. Ventillegemet 15 har også en øverste randdel 18, der er indrettet til at samarbejde med og til at indgribe med et ringformet efter-giveligt ventilsæde 19. Det klokkeformede ventillegeme 15 og den 30 del af huset 10, der er beliggende under ventilsædet 17, afgrænser et målekammer 20, i hvilket der er monteret et temmelig langstrakt øverste flydeorgan eller en svømmer 21 og et kortere, nederste flyde-organ eller en svømmer 22. Flydeorganeme eller svømmerne 21 og 22 har ringformede tværsnit, der omslutter en førestang 23, som strækker 35 sig centralt og i hovedsagen lodret inde i målekammeret 20, og flydeorganeme kan inden for visse grænser frit bevæge sig lodret langs førestangen. Det øverste flydeorgan 21's nederste stilling bestemmes af et 6 U4542 i forhold til huset 10 fast understøtningsorgan 24, og en flange, der er udformet ved den nederste ende af flydeorganet 21, kan indgribe med understøtningsorganet som vist i fig. 1 og 3. Det nederste flydeorgan 22, der indeholder et magnetorgan 25, er i sin nederste stilling 5 understøttet af bunden af huset 10, dvs., når der ikke findes væske i målekammeret 20. Førestangen 23, der er af et ikke-mag-netiserbart materiale, indeholder to med indbyrdes lodret afstand anbragte kontakter eller relæer 26, f.eks. såkaldte reed-relæer.When this apparatus is used to measure the milking performance of a dairy cow, the fluid inlet line may be connected to the teat cups used for milking the cow. The lower part of the housing 10 is connected to a liquid outlet conduit or channel 12 extending upwardly to a container 13 or a container-like extension on a vacuum conduit 14 which communicates with the milk transport line of the milking plant (not shown) together with the upper one. part of housing 10. A tubular or bell-shaped valve body 15 disposed vertically movable in housing 10 has a resilient lower rim portion 16 adapted to cooperate with and closely engage a downwardly annular valve seat 17 in housing 10. Valve body 15 also has an upper rim portion 18 which is adapted to cooperate with and to engage with an annular compliant valve seat 19. The bell-shaped valve body 15 and the portion 30 of the housing 10 located below the valve seat 17 define a measuring chamber 20, in which is mounted a rather elongated upper float member or swimmer 21 and a shorter lower float member or swimmer 22. Float member e or swimmers 21 and 22 have annular cross-sections enclosing a bar 23 extending 35 centrally and substantially vertically within the measuring chamber 20, and the float means within certain limits can move freely along the bar. The lower position of the upper float member 21 is determined by a fixed support member 24 relative to the housing 10 and a flange formed at the lower end of the float member 21 can engage with the support member as shown in FIG. 1 and 3. The lower float member 22 containing a magnetic member 25 is supported in its lower position 5 by the bottom of the housing 10, i.e. when no liquid is found in the measuring chamber 20. The first rod 23 which is of a non-mag -nettable material, contains two spaced contacts or relays 26, e.g. so-called reed relays.

Disse relæer kan via elektriske ledere 27 og forstærkningsorganer 10 28 styre en ventil 29, ved hjælp af hvilken målekammeret 20 kan bringes i forbindelse med atmosfæren.These relays can control, via electrical conductors 27 and amplifying means 10 28, a valve 29 by means of which the measuring chamber 20 can be connected to the atmosphere.

Det ovenfor beskrevne måleapparat virker på følgende måde: 15 I apparatets udgangsstilling, der er vist i fig. 3, befinder det klokkeformede ventillegeme 15 sig i sin nederste stilling, og væske eller mælk kan strømme fra væskeindløbskanalen 11 ind i huset 10, forbi det ringformede ventilsæde 17 og ind i målekammeret 20. Flydeorganerne 21 og 22 befinder sig i deres nederste stillinger, i 20 hvilke de er anbragt med indbyrdes lodret afstand. Ventilen 29 er lukket, og da målekammeret 20 såvel som den øvrige del af huset 10's indre rum står i forbindelse med vakuumledningen 14, står hele huset 10's indre under vakuum. Når væskeniveauet i målekammeret 20 stiger, kommer det nederste flydeorgan 22 efterhånden 25 til at flyde i væsken og vil så blive bevæget opefter, indtil det rammer den nederste ende af det øverste flydeorgan 21, som det er vist i fig. 1, og de to flydeorganer 21 og 22 vil nu fungere som et sammenhængende flydeorgan. Dette sammenhængende flydeorgan vil ikke begynde at bevæge sig opefter, før væskeniveauet 20 i målekammeret 20 er steget væsentligt mere, nemlig op til et sådan niveau, at det væskevolumen, der fortrænges af flydeorganerne 21 og 22, har samme vægt som de to flydeorganer tilsammen. Når det øverste flydeorgan 21 er blevet bevæget et mindre stykke opefter fra understøtningsorganet 24 som vist i fig. 2, vil magnetorganet 25 25 i det nederste flydeorgan være placeret på samme niveau som det øverste af relæerne 26, der derved aktiveres, hvilket bevirker, at der overføres et signal til forstærkningsorganerne 28, hvilket 144542 7 igen forårsager åbning af ventilen 24, så at målekammeret 20 bringes i forbindelse med atmosfæren. Den pludselige trykstigning inde i målekammeret 20 bevirker, at det klokkeformede ventillegeme 15 bevæges opefter, så at dettes randdele 16 og 18 bringes i tæt indgreb 5 med deres respektive ventilsæder 17 og 19. Når tilførslen af væske til målekammeret 20 er standset som vist i fig. 2, vil det forøgede tryk i målekammeret 20 hurtigt presse væsken fra målekammeret 20 ud gennem udløbsledningen 12 og ind i beholderen 13, fra hvilken væsken eller mælken udtømmes gennem malkeanlæggets mælketransport-10 ledning. Når væskeniveauet inde i målekammeret 20 under udtømningsoperationen efterhånden synker, vender flydeorganerne 21 og 22 tilbage til deres udgangsstillinger. Først vil det øverste flydeorgan 21 igen komme i indgreb med og blive understøttet af understøtningsorganet 24, og når i hovedsagen al væsken er blevet presset 15 ud af målekammeret, vil også det nederste flydeorgan 22 nå sin nederste stilling, i hvilken det understøttes af huset 10's bund. I denne stilling omslutter magnetorganet 25 de nederste af relæerne 26, som derved aktiveres, hvorved ventilen 29 bringes til at lukke.The measuring apparatus described above operates as follows: In the starting position of the apparatus shown in FIG. 3, the bell-shaped valve body 15 is in its lower position, and liquid or milk may flow from the liquid inlet channel 11 into the housing 10, past the annular valve seat 17 and into the measuring chamber 20. The flow means 21 and 22 are in their lower positions, in 20 which are spaced apart. The valve 29 is closed, and as the measuring chamber 20 as well as the other part of the interior space of the housing 10 communicates with the vacuum line 14, the entire interior of the housing 10 is in vacuum. As the liquid level in the measuring chamber 20 rises, the lower float member 22 eventually flows into the liquid and will then move upwardly until it hits the lower end of the upper float member 21, as shown in FIG. 1, and the two float means 21 and 22 will now act as a continuous float means. This contiguous float means will not begin to move upward until the liquid level 20 in the measuring chamber 20 has risen substantially more, that is, to such a level that the fluid volume displaced by the float means 21 and 22 has the same weight as the two float means together. When the upper float member 21 has been moved a small distance upwardly from the support member 24 as shown in FIG. 2, the magnetic means 25 25 in the lower flow means will be located at the same level as the top of the relays 26, thereby being actuated, which causes a signal to be transmitted to the gain means 28, which in turn causes the valve 24 to open, so that the measuring chamber 20 is brought into contact with the atmosphere. The sudden rise in pressure within the measuring chamber 20 causes the bell-shaped valve body 15 to move upwardly so that its rim portions 16 and 18 are tightly engaged 5 with their respective valve seats 17 and 19. When the supply of liquid to the measuring chamber 20 is stopped as shown in FIG. . 2, the increased pressure in the measuring chamber 20 will rapidly push the liquid from the measuring chamber 20 out through the outlet conduit 12 and into the container 13, from which the liquid or milk is discharged through the milk transport line of the milking plant. As the liquid level inside the measuring chamber 20 during the discharge operation gradually decreases, the flow means 21 and 22 return to their initial positions. First, the upper float member 21 will again engage and be supported by the support member 24, and when substantially all of the liquid has been squeezed 15 out of the measuring chamber, the lower float member 22 will also reach its lower position in which it is supported by the housing 10. bottom. In this position, the magnetic member 25 encloses the lower of the relays 26 which are thereby activated, thereby causing the valve 29 to close.

Derefter vender ventillegemet 15 tilbage til sin nederste stilling, 20 hvorved en del af den væske, der er blevet opsamlet inde i huset 10 uden for målekammeret 20, vil strømme ind i målekammeret. Når en væskemængde svarende til den, der netop er blevet udtømt, igen er blevet opsamlet inde i målekammeret 20, gentages udtømningsoperationen .Thereafter, the valve body 15 returns to its lower position 20 whereby a portion of the liquid which has been collected inside the housing 10 outside the measuring chamber 20 will flow into the measuring chamber. When a quantity of liquid similar to that just emptied has been collected again within the measuring chamber 20, the emptying operation is repeated.

2525

Man vil forstå, at den gennem indløbsledningen 11 til apparatet tilførte væske eller mælk vil blive opdelt i et antal portioner, der har i hovedsagen samme vægt på trods af eventuelle variationer i væskens vægtfylde, f.eks. som følge af et varierende indhold af 30 luftbobler i væsken. Det elektriske kredsløb, der styrer ventilen 20, kan omfatte organer til tælling af antallet af udtømningsoperationer, og den totale mængde af den udtøm te væske kan til enhver tid beregnes ved, at antallet af udtømningsoperationer multipliceres med massen eller vægten af den portion, der hver 35 gang udtømmes fra målekammeret. Den totale vægt eller masse kan naturligvis beregnes af det elektriske kredsløb og direkte angives ved hjælp af en passende udlæsnings- eller indikeringsindretning.It will be appreciated that the liquid or milk supplied through the inlet conduit 11 to the apparatus will be divided into a number of portions having substantially the same weight, despite any variations in the density of the liquid, e.g. due to a varying content of 30 air bubbles in the liquid. The electrical circuit controlling the valve 20 may comprise means for counting the number of discharge operations, and the total amount of the discharged fluid can be calculated at any time by multiplying the number of discharge operations by the mass or weight of the portion each 35 times are discharged from the measuring chamber. The total weight or mass can, of course, be calculated by the electrical circuit and directly indicated by an appropriate reading or indicating device.

144542 8144542 8

Fig. 4 viser en simplificeret udførelsesform, i hvilken de to flyde-organer eller svømmere er blevet erstattet af et enkelt flydeorgan eller en svømmer 30, på hvilken ventillegemet 15 er blevet monteret. Ventilen 29 og dens elektriske styrekredsløb er udeladt og erstattet 5 af en lufttilførselsledning 31, der har et forholdsvis lille tværsnitsareal og danner konstant forbindelse mellem målekammeret 20 og atmosfæren.FIG. 4 shows a simplified embodiment in which the two floating means or swimmers have been replaced by a single floating means or a swimmer 30 on which the valve body 15 has been mounted. The valve 29 and its electrical control circuit are omitted and replaced by an air supply line 31 which has a relatively small cross-sectional area and maintains a constant connection between the measuring chamber 20 and the atmosphere.

Når mælk eller en anden væske strømmer ind i huset 10 gennem væskeindløbsledningen 11, vil væskeniveauet inde i målekammeret 20 og det indre af huset 10 stige. Når væskeniveauet har nået et 1° bestemt niveau, ved hvilket flydeorganet 30 og det derpå monterede ventillegeme 15 tilsammen fortrænger en væskemængde, der har en vægt, som svarer til den samlede vægt af flydeorganet 30 og ventillegemet 15, begynder ventillegemet 15 at bevæge sig opefter sammen med flydelegemet 30. Når ventillegemet 15's randdele 16 og 18 nærmer 15 sig deres respektive sæder 17 og 19, vil trykket inde i målekammeret 20, der står i forbindelse med atmosfæren gennem ledningen 31, vokse i en sådan grad sammenlignet med vakuummet i den øvrige del af huset 10, at ventillegemet 15 pludseligt presses tæt mod ventilsæderne 17 og 19, hvorefter den væskemængde, der er blevet opsamlet 20 inde i målekammeret 20, presses ud gennem udløbsledningen 12 som tidligere beskrevet. Efter udtømning af væsken vil flydeorganet 30 og det derpå monterede ventillegeme 15 bevæge sig tilbage til deres udgangsstillinger, hvorefter endnu en væskemængde kan strømme ind i målekammeret 20.As milk or other liquid flows into the housing 10 through the liquid inlet line 11, the liquid level inside the measuring chamber 20 and the interior of the housing 10 increases. When the fluid level has reached a 1 ° determined level at which the float member 30 and the valve body 15 mounted thereon together displace a quantity of liquid having a weight corresponding to the total weight of the float member 30 and the valve body 15, the valve body 15 begins to move upwards. together with the floating body 30. As the rim members 16 and 18 of the valve body 15 approach their respective seats 17 and 19, the pressure inside the measuring chamber 20, which communicates with the atmosphere through the conduit 31, will increase to such an extent as compared to the vacuum in the other part of the housing 10, that the valve body 15 is suddenly pressed tightly against the valve seats 17 and 19, after which the amount of liquid which has been collected 20 inside the measuring chamber 20 is pressed out through the outlet line 12 as previously described. After discharging the liquid, the float member 30 and the valve body 15 mounted thereon will move back to their initial positions, after which a further amount of liquid can flow into the measuring chamber 20.

2525

Den i fig. 5 viste udførelsesform fungerer efter det samme princip som de i fig. 1-4 viste udførelsesformer, og for at lette forståelsen af det i fig. 5 viste apparat er de dele af dette, der svarer til dele i de i fig. 1-4 viste udførelsesformer, forsynet med de 30 samme henvisningsbetegnelser.The FIG. 5 illustrates the same principle as those of FIG. 1-4, and to facilitate the understanding of the embodiment of FIG. 5 are those parts of this which correspond to parts in the parts of FIG. 1-4, provided with the same reference numerals.

Ved den i fig. 5 viste udførelsesform er væskeindløbsledningen eller -kanalen 11 forbundet med et ringformet væskeindløb s rum 32 i den øverste del af huset 10 på en sådan måde, at væskestrømmen føres 35 tangentialt ind i indløbsrummet og bringes til at rotere i dette. Det ringformede rum 32 er radialt indadtil afgrænset af en ringformet skærmplade 33, der har en skråt udefter rettet flange 33a, som 144542 9 sammen med en tilgrænsende del af huset afgrænser et forholdsvis snævert ringformet mellemrum 34, der tjener som filtreringsspalte.In the embodiment shown in FIG. 5, the liquid inlet conduit or channel 11 is connected to an annular liquid inlet's compartment 32 in the upper part of the housing 10 in such a way that the liquid flow is introduced tangentially into the inlet compartment and caused to rotate therein. The annular space 32 is radially inwardly delimited by an annular screen plate 33 having an obliquely directed flange 33a which defines, together with an adjoining portion of the housing, a relatively narrow annular space 34 serving as a filter gap.

I fig. 5 har udtømningsbeholderen 13 form af et i den øverste del af huset 10 udformet udtømningsrum, og væskeudløbsåbningen 12, 5 der forbinder den nederste del af målekammeret 20 med udtøm ningsrummet, strækker sig centralt opefter gennem målekammeret og gennem de deri anbragte svømmere eller flydeorganer 21 og 22. Udløbsledningen eller udtømningsrøret 12 er således anbragt på lignende måde som førestangen 23 i de ovenfor beskrevne udførelsesfor-10 mer. Ventilen 29, der tjener til at forbinde målekammeret 20 med atmosfæren, er monteret neden under målekammeret og står i forbindelse med et luftindløbsrør 35, der strækker sig lodret opefter gennem målekammeret. En understøtningsplade 37 til understøtning af ventillegemet 15 i dettes nederste stilling, der er vist i fig. 5, 15 er fastgjort til den øverste ende af indløbsrøret 35 og af et tilsvarende, diametralt modsat anbragt rør 36.In FIG. 5, the discharge vessel 13 is in the form of a discharge space formed in the upper part of the housing 10, and the liquid outlet opening 12, 5 which connects the lower part of the measuring chamber 20 to the discharge space extends centrally upwards through the measuring chamber and through the swimmers or flow means 21 and 22. Thus, the outlet conduit or discharge tube 12 is disposed in a similar manner to the lead bar 23 in the embodiments described above. The valve 29, which serves to connect the measuring chamber 20 with the atmosphere, is mounted below the measuring chamber and communicates with an air inlet pipe 35 extending vertically upwards through the measuring chamber. A support plate 37 for supporting the valve body 15 in its lower position shown in FIG. 5, 15 are attached to the upper end of the inlet pipe 35 and of a corresponding diametrically opposed tube 36.

Relæerne 26 er monteret inde i røret 36 og ved hjælp af elektriske ledere 27 forbundet med et elektrisk kredsløb, der er anbragt inde 20 i en til apparatet hørende elektronisk enhed 38, og som bl.a. tjener til at styre ventilen 29. Den elektroniske enhed omfatter en digital indikeringsindretning 39, der direkte kan angive vægten af den væskemængde, der har passeret apparatet. Den elektroniske enhed har også en afbryder 40 og kontrollamper 41 til angivelse af ap-25 paratets arbejdstilstand samt en udtømningsstartkontakt 42, hvis funktion vil blive beskrevet i det følgende.The relays 26 are mounted inside the tube 36 and are connected by means of electrical conductors 27 to an electrical circuit located inside 20 of an electronic unit 38 of the apparatus, serves to control the valve 29. The electronic unit comprises a digital indicating device 39 which can directly indicate the weight of the amount of liquid which has passed the apparatus. The electronic unit also has a switch 40 and control lamps 41 for indicating the working state of the device and a discharge start switch 42, the function of which will be described below.

Flydeorganerne 21 og 22 føres ikke som ved de tidligere beskrevne udførelsesformer af en central førestang, men er bevægeligt op-30 hængt ved hjælp af ophængningsorganer 43, der er monteret på rørene 35 og 36 og tillader flydeorganerne at bevæge sig lodret, men ikke vandret, som det vil blive mere detaljeret forklaret i fig. 8 og 9. En boring, der strækker sig gennem væggen af væskeudløbsrøret 12 ved dettes øverste ende, er forbundet med 35 en prøvebeholder 46 via et prøveudtagningsrør 44 og et prøveud-tømningsrør 45, og prøvebeholderen 46 er forneden forsynet med en manuel betjenelig udtømningsventil 47. Hele apparatet kan op- U4542 10 hænges på et passende sted, f.eks. på et malkeanlægs mælketrans-portledning, ved hjælp af ophængningskroge 48. For at sikre ensartede forhold inde i udtømningsrummet 13 og inde i den del af huset 10's indre rum, der ligger uden for ventillegemet 15, er disse 5 rum indbyrdes forbundet ved hjælp af en ventilindretning 53, der udmunder i udtømningsrummet 13 via åbninger 54 beliggende i en reces i huset 10's øverste endevæg.The float means 21 and 22 are not guided as in the previously described embodiments of a central guide rod, but are movably suspended by suspension means 43 mounted on the tubes 35 and 36 and allow the float members to move vertically but not horizontally. as will be explained in more detail in FIG. 8 and 9. A bore extending through the wall of the liquid outlet tube 12 at its upper end is connected to 35 a sample container 46 via a sampling tube 44 and a sample discharge tube 45, and the sample container 46 is provided with a manual operable discharge valve 47 below. The whole apparatus can be hung at a suitable location, e.g. on a milk transporter's milk conveying line, by means of suspension hooks 48. In order to ensure uniform conditions inside the discharge space 13 and inside the part of the internal space of the housing 10 which is outside the valve body 15, these 5 spaces are interconnected by means of a valve device 53 which opens into the discharge space 13 via openings 54 located in a recess in the upper end wall of the housing 10.

Den mælke- eller væskestrøm, der gennem indløbsrøret eller -led-10 ningen 11 strømmer ind i indløbsrummet 32, vil som følge af den tangentielle anbringelse af denne indløbsledning 11 blive bragt i roterende bevægelse og til at strømme ned gennem filterspalten 34 som et ringformet væsketæppe. Den væskemængde, der roterer inde i rummet 32, er påvirket af en skråt nedefter og udefter 15 rettet kraft hidrørende fra tyngdekraften og centrifugalkraften.The milk or liquid flow flowing through the inlet tube or conduit 11 into the inlet compartment 32 will, due to the tangential placement of this inlet conduit 11, be brought into rotary motion and to flow down through the filter gap 34 as an annular fluid blanket. . The amount of fluid rotating inside the compartment 32 is influenced by an inclined downward and outwardly directed force resulting from gravity and centrifugal force.

Den skråtrettede kraft bevirker, at den del af væsken, der har den største massefylde - dvs. den væske, der indeholder den mindste relative luftmængde - koncentreres i spalten 34. Væskens passage gennem spalten 34 virker således i retning af at undertrykke en 20 eventuel skumningstilbøjelighed, og spalten 34 tjener også til at tilbageholde eventuelle større urenheder, såsom hår og lignende.The inclined force causes the part of the liquid to have the greatest density - ie. the liquid containing the least relative amount of air - is concentrated in the slot 34. Thus, the passage of the liquid through the slot 34 acts to suppress any foaming tendency, and the slot 34 also serves to retain any major impurities, such as hair and the like.

Når væskeniveauet i huset 10 og følgelig også i målekammeret 20 stiger, vil det nederste flydeorgan 22 blive bevæget opefter, indtil dets bevægelse standses på grund af, at det støder mod det øverste 25 flydeorgan 21's bundflade. De to flydeorganer vil ikke blive bevæget opefter sammen, før væskeniveauet i målekammeret 20 er steget i en sådan grad, at den totale opdrift, der påvirker flydeorganerne 21 og 22, er tilstrækkelig til dels at neutralisere den samlede vægt af flydeorganerne og dels til at overvinde den forholdsvis lille mod-30 stand, ophængningsorganerne 43 udøver mod flydeorganernes lod rette bevægelse. Flydeorganerne bevæges et lille stykke opefter, indtil magnetorganet 25 i det øverste flydeorgan 21 kommer til at ligge ud for det øverste relæ 26. Dette relæ vil så blive aktiveret og frembringe et signal, der bevirker, at ventilen 29 åbnes, hvorved 33 målekammeret 20 bringes i forbindelse med atmosfæren gennem luftindløbsrøret 35. Det relative overtryk, der derved frembringes inde i målekammeret 20, vil hurtigt bevæge det klokkeformede 11 U4542 ventillegeroe 15 opefter, så at dettes nederste og· øverste randdele, henholdsvis 16 og 18, bringes i tæt indgreb med deres respektive ventilsæder 17 og 19. Målekammeret 20 er nu tæt lukket i forhold til den øvrige del af huset 10’s indre rum, og atmosfæretrykket 5 inde i målekammeret vil derfor hurtigt udtømme væskemængden i målekammeret op gennem det centrale væskeudløbsrør 12 og ind i udtømningsrummet 13. En mindre, men repræsentativ del af den væske, der udtømmes gennem røret 12, vil blive presset ind i prøveudtagningsrøret 14, hvorfra den vil strømme gennem ud-10 tømningsrøret 45 ned i prøvebeholderen 46. Fra en fordybning 55 i bunden af udtømningsrummet 13 suges mælken eller væsken opefter gennem vakuumledningen 14 og ind i mælketransportledningen for det malkeanlæg, i forbindelse med hvilket måleapparatet anvendes.As the liquid level in the housing 10 and consequently also in the measuring chamber 20 rises, the lower float member 22 will be moved upwards until its movement is stopped due to abutting the bottom surface of the top 25 float member 21. The two float means will not be moved upwards together until the liquid level in the measuring chamber 20 is increased to such an extent that the total buoyancy affecting the float means 21 and 22 is sufficient to partially neutralize the total weight of the float means and partly to overcome the relatively small resistance the suspension means 43 exert against the vertical movement of the floating members. The float means are moved slightly upwards until the magnetic means 25 in the upper float means 21 lie next to the upper relay 26. This relay will then be actuated and produce a signal which causes the valve 29 to open, whereby the measuring chamber 20 is brought in conjunction with the atmosphere through the air inlet pipe 35. The relative overpressure thus generated within the measuring chamber 20 will rapidly move the bell-shaped valve 15 upwardly so that its lower and upper rim portions, 16 and 18, respectively, are brought into close engagement with the their respective valve seats 17 and 19. The measuring chamber 20 is now tightly closed relative to the other part of the housing 10, and the atmospheric pressure 5 within the measuring chamber will therefore rapidly discharge the amount of liquid in the measuring chamber up through the central liquid outlet pipe 12 and into the discharge space 13. A smaller but representative portion of the liquid discharged through the tube 12 will be pressed into the sampling tube 14 from which it will flow through the discharge tube 45 into the sample container 46. From a depression 55 at the bottom of the discharge space 13, the milk or liquid is drawn upwardly through the vacuum line 14 and into the milk transport line for the milking plant in connection with which the measuring apparatus is used.

Den ende af vakuumledningen 14, som strækker sig ind i rummet 15 13, omsluttes af en delcylindrisk skærmplade 56, fig. 6 og 7, hvis sidekanter er anbragt i en sådan afstand fra rummet 13's perifere væg 57, at der mellem disse sidekanter af skærmpladen 56 og den perifere væg 57 dannes snævre spalter 58. Når en væskeportion udtømmes fra målekammeret 20 gennem væskeudløbsrøret 12, strømmer 20 væsken gennem spalterne 58 ind i fordybningen 55 med en strømningshastighed, der er mindre end vakuumledningen 14's indsugningskapacitet. Som følge heraf vil en væsentlig luftmængde blive suget ind i vakuumledningen 14 sammen med væsken og blive blandet med denne. Hvis væsken var blevet suget op gennem vakuumledningen 25 som sammenhængende væskesøjler, ville dette forårsage uheldige midlertidige reduktioner af vakuummet ved pattekopperne, når apparatet anvendes i forbindelse med en malkemaskine eller et malkeanlæg.The end of the vacuum line 14 extending into the space 15 13 is enclosed by a partial cylindrical shield plate 56, FIG. 6 and 7, the side edges of which are located at such a distance from the peripheral wall 57 of the compartment 13 that narrower slits 58 are formed between these side edges of the screen plate 56 and the peripheral wall 57. When a liquid portion is discharged from the measuring chamber 20 through the liquid outlet tube 12, 20 the liquid through the slits 58 into the recess 55 at a flow rate less than the suction capacity of the vacuum line 14. As a result, a substantial amount of air will be sucked into the vacuum line 14 along with the liquid and mixed with it. If the liquid had been sucked up through the vacuum line 25 as continuous fluid columns, this would cause unfortunate temporary reductions in the vacuum of the teat cups when the apparatus is used in conjunction with a milking machine or milking plant.

Når væskeniveauet i målekammeret 20 synker som følge af den 30 ovennævnte udtømning gennem vakuumledningen 14, vil flydeor-ganerne 21 og 22 sammen bevæge sig nedefter, indtil flydeorganet 21 når sin nederste stilling, og derefter vil det nederste flydeorgan 22 fortsætte sin nedadgående bevægelse til sin nederste stilling.As the liquid level in the measuring chamber 20 decreases as a result of the aforementioned discharge through the vacuum conduit 14, the float means 21 and 22 will move downward together until the float member 21 reaches its lower position, and then the lower float member 22 will continue its downward movement to its bottom position.

Når magnetorganet 25, der er anbragt inde i flydeorganet 22, 35 passerer det nederste relæ 26, vil dette relæ blive aktiveret og frembringe et signal, der bringer ventilen 29 til at lukke og afbryde forbindelsen mellem målekammeret 20 og atmosfæren. Derefter falder 144542 12 ventillegemet 15 tilbage til sin nederste stilling, så at målekammeret 20 kan fyldes med endnu en portion af mælk eller en anden væske.As the magnetic member 25 disposed within the float member 22, 35 passes the lower relay 26, this relay will be activated and produce a signal that causes the valve 29 to close and disconnect the measurement chamber 20 from the atmosphere. Thereafter, the valve body 15 falls back to its lower position so that the measuring chamber 20 can be filled with yet another portion of milk or other liquid.

Også ved den udførelsesform, der er vist i fig. 5-7, måles den 5 væske, der strømmer gennem apparatet, i virkeligheden ved tælling af det antal portioner, der udtømmes fra målekammeret 20. Når den væskestrøm, der skal måles, standser, f.eks. fordi malkningen af en ko er afsluttet, vil målekammeret 20 normalt indeholde en vis mængde væske, der ikke er tilstrækkelig til at starte den ovenfor 10 beskrevne normale udtømningsoperation. Hvis denne restmængde ikke udtømmes fra målekammeret, vil den formindske målenøjagtigheden såvel af den pågældende som af den efterfølgende måling af en væskestrøm. Endvidere kan opblandingen af denne restmængde fra en forudgående måling med den væskemængde, der måles under en 15 efterfølgende måleoperation, være uønsket af flere grunde. Ved den i fig. 5 viste udførelsesform kan restmængden udtømmes ved hjælp af ventilindretningen 53. Denne ventilindretning har et hus 59 med et ventilsæde 60 ved sin øverste ende og et bevægeligt ventilorgan 61, der har et nedadragende cylindrisk skørt, der 20 omslutter en lodret luftindløbsstuds 62, som er forbundet med en magnetventil 63 ved hjælp af en forbindelsesledning 64. Når det ønskes at udtømme en restmængde af væske, der er samlet i målekammeret 20, aktiveres udtømningsstartkontakten 42 manuelt, hvilket forårsager, at magnetventilen 63 åbnes, så at forbindel-25 sesledningen 64 og luftindløbsstudsen 62 bringes i forbindelse med atmosfæren. Der vil så strømme luft ind gennem luftindløbsstudsen 62, hvorved ventillegemet 61 blæses opefter mod sit sæde 60. Da rummet oven over ventilsædet er udsat for vakuum, medens ventilorganet 61's bundflade er udsat for et tryk, der i hovedsagen 20 er lig med atmosfæretrykket, vil ventilorganet 61 fortsat blive suget mod sit ventilsæde 60. Atmosfæretrykket vil forplante sig fra indløbsstudsen 62 til målekammeret 20 og til det indre rum i huset 10 bortset fra udtømningsrummet 13, der er udsat for vakuum.Also in the embodiment shown in FIG. 5 to 7, the liquid flowing through the apparatus is actually measured by counting the number of portions discharged from the measuring chamber 20. When the liquid flow to be measured is stopped, e.g. because the milking of a cow is completed, the measuring chamber 20 will normally contain a certain amount of liquid not sufficient to start the normal discharge operation described above 10. If this residual quantity is not discharged from the measuring chamber, it will decrease the measurement accuracy both by the person concerned and by the subsequent measurement of a liquid flow. Furthermore, the mixing of this residual amount from a prior measurement with the amount of liquid measured during a subsequent measurement operation may be undesirable for several reasons. In the embodiment shown in FIG. 5, the residual amount can be discharged by means of the valve device 53. This valve device has a housing 59 with a valve seat 60 at its upper end and a movable valve member 61 having a downwardly cylindrical skirt 20 which encloses a vertical air inlet nozzle 62 which is connected. with a solenoid valve 63 by means of a connecting line 64. When it is desired to discharge a residual amount of liquid collected in the measuring chamber 20, the discharge start switch 42 is manually activated, causing the solenoid valve 63 to open so that the connecting line 64 and the air inlet socket 62 is connected to the atmosphere. Air will then flow through the air inlet nozzle 62, whereby the valve body 61 is blown upwardly against its seat 60. Since the space above the valve seat is exposed to vacuum, while the bottom surface of the valve member 61 is subjected to a pressure substantially equal to atmospheric pressure, the valve means 61 will continue to be sucked against its valve seat 60. The atmospheric pressure will propagate from the inlet nozzle 62 to the measuring chamber 20 and to the interior space of the housing 10 except for the vacuum chamber 13 which is subject to vacuum.

35 Trykforskellen bevirker, at hele restmængden af væske presses fra målekammeret 20 og det omgivende kammer i huset opefter gennem udløbsrøret 12 og ind i udtømningsrøret 13. Når væsken er blevet 13 U4542 helt udtøm t fra målekammeret 20, vil det nederste flydeorgan 21 være sunket ned til det niveau, på hvilket det nederste relæ 26 aktiveres, hvilket forårsager, at magnetventilen 63 lukkes.The pressure difference causes the entire residual amount of liquid to be squeezed from the measuring chamber 20 and the surrounding chamber of the housing upwards through the outlet tube 12 and into the discharge tube 13. When the liquid has been completely discharged from the measuring chamber 20, the lower flow means 21 will be lowered. to the level at which the lower relay 26 is actuated causing the solenoid valve 63 to close.

Trykforholdene vil så igen blive ensartede over hele det indre rum 5 i apparatet, og ventilorganet 61 vil derfor falde tilbage til sin udgangsstilling, i hvilken det understøttes af luftindløbsstudsen 62 som vist i fig. 5. Vægten eller massen af den udtøm te væskerestmængde kan bestemmes på basis af den tid, der forløber fra det tidspunkt, på hvilket kontakten 42 aktiveres manuelt, til det tidspunkt, på 10 hvilket magnetorganet 25 i det nederste flydeorgan 22 aktiverer det nederste relæ 26, idet der tages hensyn til empirisk bestemte reaktionstider for ventilindretningen 53 og andre dele af apparatet. Beregningen af restmængdens vægt eller masse på grundlag af udtømningstiden foretages hensigtsmæssigt ved hjælp af apparatets 15 elektroniske enhed 38, der også hensigtsmæssigt automatisk kan addere restmængdens vægt med den vægt af væsken, der er blevet bestemt ved tælling af antallet af udtømte væskeportioner.The pressure conditions will then again be uniform throughout the interior space 5 of the apparatus, and the valve member 61 will therefore fall back to its initial position, in which it is supported by the air inlet port 62 as shown in FIG. 5. The weight or mass of the depleted liquid residual amount may be determined based on the time elapsing from the time at which the switch 42 is manually activated to the time at which the magnetic means 25 in the lower float means 22 activates the lower relay 26 , taking into account empirically determined reaction times for valve assembly 53 and other parts of the apparatus. The calculation of the weight or mass of the residual on the basis of the discharge time is conveniently done by means of the electronic unit 38 of the apparatus 15, which can also conveniently automatically add the weight of the residual amount to the weight of the liquid determined by counting the number of discharged liquid portions.

Fig. 8 viser en første udførelsesform for ophængningsorganerne 43, 20 der anvendes til bevægelig ophængning af flydeorganeme 21 og 22 langs rørene 35 og 36 i det i fig. 5 viste apparat. Ophængningsorganet 43, der f.eks. kan være udstanset af en tynd elastisk plade af stål eller et andet metal, har en i hovedsagen cirkulær form med to opslidsede monteringsflige 49, der i ophængningsorganets monterede 25 tilstand omslutter hver sit af rørene 35 og 36. Udstansningsmønsteret er valgt således, at ophængningsorganet 43 kommer til at bestå af en ringformet ydre rammedel 50, der er forsynet med fligene 49, og to modsat rettede, cirkulært krummede ophængningsarme 51, der strækker sig ud fra de nævnte flige 49 og har "frie" ender, der er ind-30 byrdes forbundet ved hjælp af en indre, opslidset monteringsring 52, der er indrettet til at blive monteret på flydeorganernes endedele.FIG. 8 shows a first embodiment of the suspension means 43, 20 used for movable suspension of the floating means 21 and 22 along the pipes 35 and 36 in the FIG. 5. The suspension means 43, e.g. may be punched out of a thin elastic plate of steel or other metal, has a generally circular shape with two slotted mounting tabs 49 which, in the mounted state of the suspension member, encloses each of the tubes 35 and 36. The punching pattern is selected such that the suspension member 43 will consist of an annular outer frame member 50 provided with the tabs 49 and two oppositely directed, circularly curved suspension arms 51 extending from said tabs 49 and having "free" ends interconnected. connected by means of an inner slotted mounting ring 52 arranged to be mounted on the end parts of the floating members.

Det ses, at armene 51 vil yde en stor modstand mod udbøjning i ophængningsorganet 43's plan, medens de i hovedsagen ikke vil yde nogen modstand mod udbøjning i retningen vinkelret på dette 35 plan· 144542 14It is seen that the arms 51 will provide a great resistance to deflection in the plane of the suspension means 43, while in the main they will not provide any resistance to deflection in the direction perpendicular to this plane.

Fig. 9 viser en anden udførelsesf orm for ophasngningsorganerne 43. Den ringformede ydre rammedel 50 er her udeladt, og hverken fligene 49 eller monterings ringen 52 er opslidset. Til gengæld er monteringsringen 52 forsynet med et par diametralt modsatte anbragte 5 små cirkulære åbninger 65 til optagelse af skruer eller andre fastgørelsesorganer til fastgørelse af monteringsringen til et flydeorgan.FIG. 9 shows another embodiment of the suspension means 43. The annular outer frame member 50 is omitted here and neither the tabs 49 nor the mounting ring 52 are slotted. In contrast, the mounting ring 52 is provided with a pair of diametrically opposed 5 small circular openings 65 for receiving screws or other fasteners for securing the mounting ring to a float.

Det har vist sig, at man kan opnå en væsentlig forøget nøjagtighed for den niveaudetektering, der foretages ved hjælp af relæerne 26 10 og de dermed samarbejdende magnetorganer 25, hvis hvert af relæerne er omgivet af et magnetiserbart materiale, f.eks. en jernklods 66, der er opdelt af en i hovedsagen vandret, smal spalte 67, se fig.It has been found that a substantially increased accuracy can be obtained for the level detection made by the relays 26 10 and the cooperating magnetic means 25 if each of the relays is surrounded by a magnetizable material, e.g. an iron block 66 divided by a generally narrow, narrow gap 67, see FIG.

10. Den magnetiserbare klods 66 og relæet 26's kontakter, der også er af et magnetiserbart materiale, vil så bevirke, at det magnetiske 15 felt, der frembringes af magnetorganet 25, får et sådant forløb omkring relæet 26, at dette kun bliver aktiveret og sluttet, når magnetorganet 25 indtager den med punkterede linjer viste stilling, i hvilken magnetorganet ligger nøjagtigt ud for spalten 67.10. The contacts of the magnetizable block 66 and the contacts of the relay 26, which are also of a magnetizable material, will cause the magnetic field produced by the magnet member 25 to have such a course around the relay 26 that this is only activated and closed. when the magnetic means 25 occupies the position shown by dashed lines, in which the magnetic means is precisely adjacent the slot 67.

20 Fig. 11 - 14 viser den for øjeblikket mest foretrukne udførelsesform for apparatet ifølge opfindelsen. Da funktionen af denne foretrukne udførelsesform i mange henseender svarer til funktionen af den i fig. 5 - 10 viste udførelsesform, er til hinanden svarende dele forsynet med de samme henvisningsbetegnelser. Ved den i fig. 11 - 14 viste 25 udførelsesform har den ringformede skærmplade 33 et cylindrisk skørt 68, der strækker sig nedefter fra flangen 33a og har en savtakket nederste kantdel 69, der indgriber med huset 10's ydervæg. Et ringformet mønster af skumåbninger 70 i det cylindriske skørt 68 er anbragt umiddelbart neden under flangen 33a, og mellem skærmpladen 30 33!s kant og den tilgrænsende endevæg 72 af huset dannes en luftspalte 71. Ventilen 29 er en tregangsventil, der er forbundet med ledninger - . 73 og 74, der henholdsvis står i forbindelse med atmosfæren og en vakuumkilde, f.eks. et malkeanlægs vakuumledning. Luftindløbsrøret 35 forbinder ventilen 29 med et ringformet rum 75, der af grænses 35 mellem oversiden af understøtningsorganet 37 og et ekspanderbart, ringformet, rendeformet organ 76, der indgriber med ventillegemet 15's øverste endevæg, se fig. 12. Ventillegemet 15's øverste endevæg 144542 15 indeholder en forbindelsesboring 77, og et lodret forløbende forbindelsesrør 78 er ført gennem huset 10's øverste endevæg 72 og er ved sin inde i udtømningsrummet 13 beliggende øverste frie ende forsynet med en beskyttelseshætte 79. Understøtningsorganet 5 37 indeholder en en vej s ventil eller kontraventil 80 med et ventilorgan 81 og en fjeder 82, der søger at bevæge ventilorganet 81 til dets lukkede stilling, se fig. 12. Røret 36, der er fremstillet af et ikke-magnetiserbart materiale, f.eks. rustfrit stål, indeholder tre relæer eller afbrydere 26, f.eks. reed-relæer. De to øverste relæer 10 26 er anbragt med en lille indbyrdes lodret afstand og kan eksempelvis have en lodret indbyrdes afstand på ca. 7 mm med et formål, der vil blive beskrevet i det følgende.FIG. 11-14 illustrate the presently most preferred embodiment of the apparatus according to the invention. Since in many respects the function of this preferred embodiment is similar to that of the one shown in FIG. 5-10, corresponding parts are provided with the same reference numerals. In the embodiment shown in FIG. 11 to 14, the annular shield plate 33 has a cylindrical skirt 68 extending downwardly from the flange 33a and having a sawed lower edge portion 69 which engages the outer wall of the housing 10. An annular pattern of foam openings 70 in the cylindrical skirt 68 is disposed immediately below the flange 33a, and between the edge of the shield plate 30 33! And the adjacent end wall 72 of the housing is formed an air gap 71. The valve 29 is a three-way valve connected to conduits. -. 73 and 74 which are respectively connected to the atmosphere and a source of vacuum, e.g. the vacuum line of a milking plant. The air inlet pipe 35 connects the valve 29 to an annular space 75 which is bounded 35 between the upper surface of the support member 37 and an expandable annular gutter member 76 which engages the upper end wall of the valve body 15; 12. The upper end wall 14 of the valve body 15 contains a connecting bore 77 and a vertically extending connecting tube 78 is passed through the upper end wall 72 of the housing 10 and is provided with a protective cap 79 at its upper free end located within the discharge space 13. a valve or check valve 80 with a valve member 81 and a spring 82 which seeks to move the valve member 81 to its closed position, see FIG. 12. The tube 36 made of a non-magnetizable material, e.g. stainless steel, contains three relays or switches 26, e.g. Reed relays. The two upper relays 10 26 are arranged at a small vertical distance and may, for example, have a vertical distance of approx. 7 mm with a purpose which will be described below.

Ved den i fig. 11 - 14 viste udførelsesform er ventilindretningen 15 53 i fig. 5 blevet erstattet af en ventilindretning 83, ved hjælp af hvilken den nederste ende af væskeudløbsrøret 12 kan åbnes og lukkes. Ventilindretningen 83 har et ventilorgan 84, der er monteret således i et par elastiske membraner 85 og 86, at det kan bevæges i lodret retning. Ventilorganet 84 har en styrekegle 87 og en elastisk 20 skive 88, der samarbejder med udløbsrøret 12's nederste kant 89 og tjener som et ringformet ventilsæde. Ventilorganet 84's bevægelse styres af en tregangsventil 90, der kan være af samme type som ventilen 29, og som står i forbindelse med henholdsvis atmosfæren og en vakuumkilde, f.eks. et malkeanlægs vakuumledning. Ventilen 25 90 kan således selektivt føre vakuum eller atmosfæretryk til et ventilkammer 93, hvis øverste endevæg dannes af den nederste membran 86. Den øverste membran 85 danner bundvæggen i et væskekammer 94, og den nederste ende af udløbsrøret 12 strækker sig ned i en reces 95, der er udformet i huset 10's bunddel.In the embodiment shown in FIG. 11 to 14, the valve device 15 53 in FIG. 5 has been replaced by a valve device 83 by means of which the lower end of the liquid outlet tube 12 can be opened and closed. The valve device 83 has a valve member 84 which is mounted in a pair of elastic membranes 85 and 86 so that it can be moved in a vertical direction. The valve member 84 has a guide cone 87 and an elastic disc 88 which cooperates with the lower edge 89 of the outlet tube 12 and serves as an annular valve seat. The movement of the valve member 84 is controlled by a three-way valve 90, which may be of the same type as the valve 29, which is connected to the atmosphere and to a vacuum source, e.g. the vacuum line of a milking plant. Thus, valve 25 90 may selectively convey vacuum or atmospheric pressure to a valve chamber 93, the upper end wall of which is formed by the lower membrane 86. The upper membrane 85 forms the bottom wall of a liquid chamber 94 and the lower end of the outlet tube 12 extends into a recess 95. formed in the bottom portion of housing 10.

30 Væskekammeret 94 står i forbindelse med recessen 95 gennem en omløbskanal 96, når ventilorganet 84 er i sin øverste stilling, i hvilken det lukker den nederste ende af udløbsrøret 12 som vist i fig. 11, medens omløbskanalen 96 er lukket, når ventilorganet 84 er i sin nederste stilling. Væskekammeret 94 står i forbindelse med 35 væskeindløbsrummet 32 gennem en returledning 97.The liquid chamber 94 communicates with the recess 95 through a bypass channel 96 when the valve member 84 is in its upper position, in which it closes the lower end of the outlet tube 12 as shown in FIG. 11 while the bypass passage 96 is closed when the valve means 84 is in its lower position. The liquid chamber 94 communicates with the liquid inlet compartment 32 through a return line 97.

Huset 10 er anbragt i en ydre holder 98, der er forsynet med 144542 16 ophængningskrogene 48, og som indeholder den elektroniske enhed 38 og ventilerne 29 og 90. Hver af disse ventiler har en rørstuds 99, der tæt optages i en ringformet tætningsbælg 100 eller en anden passende tætningsindretning, når huset 10 indføres i den ydre holder 5 98, til hvilken huset kan være aftageligt fastgjort ved hjælp af udløselige fastgørelsesindretninger 101. Når huset 10 er anbragt i holderen 98, dannes der elektrisk forbindelse mellem relæerne 26 og den elektroniske enhed 38 ved hjælp af elektriske kontaktorganer 102.The housing 10 is disposed in an outer holder 98 provided with the suspension hooks 48 and containing the electronic unit 38 and the valves 29 and 90. Each of these valves has a pipe nozzle 99 which is tightly received in an annular sealing bellows 100 or another suitable sealing device when the housing 10 is inserted into the outer holder 5 98 to which the housing can be removably secured by releasable fasteners 101. When the housing 10 is arranged in the holder 98, electrical connection is formed between the relays 26 and the electronic unit. 38 by means of electrical contact means 102.

10 Et låg eller et dæk 103, der danner udtømningsrummet 13's øverste endevæg, samt andre dele af huset 10 kan være indbyrdes forbundet ved hjælp af udløselige låseorganer 104, så at husets indre rum bliver let tilgængelig for rensning etc.A lid or cover 103 which forms the upper end wall of the discharge compartment 13, as well as other parts of the housing 10, may be interconnected by releasable locking means 104 so that the interior space of the housing becomes readily accessible for cleaning etc.

15 Virkemåden for det i fig. 11 viste apparat vil nu blive beskrevet.15 The operation of the device shown in FIG. 11 will now be described.

I apparatets udgangsstilling forbinder tregangsventilen 90 ventilkammeret 93 med atmosfæren gennem ledningen 91, så at ventilkammeret 93 udsættes for atmosfæretryk, der presser den elastiske nederste membran 86 opefter, så at ventilorganet 84's elastiske skive 20 88 presses i tæt indgreb med udtømningsrøret 12's nederste kant 89, som det er vist i fig. 11. Ventilen 29 forbinder luftindløbsrøret 35 med vakuumledningen 74, så at det ringformede organ 75, der dannes af det elastiske rendeformede organ 76, udsættes for vakuum, hvorved dette rendeformede organ vil befinde sig i sin sammenklappede 25 tilstand, der er vist i fig. 11. Da ventillegemet 15 understøttes af det rendeformede organ 76, befinder ventillegemet 15 sig i sin åbne stilling som vist i fig. 11. Huset 10's indre rum uden for ventillegemet 15 opdeles af skørtet 68 i et indre og et ydre ringformet kammer, henholdsvis 105 og 106. Det indre kammer 105 er i konstant forbindelse 30 med udtømningsrummet 13 og vakuumledningen 14 gennem forbindelsesrøret 78, og det indre og ydre kammer 105 og 106 er indbyrdes forbundet såvel gennem luftspalten 71 som gennem skumåbningerne 70. I ventillegemet 15's åbne stilling er målekammeret 20 endvidere i forbindelse med det indre kammer 105 gennem en nederste ventil-35 spalte, der af grænses mellem randdelen 16 og ventilsædet 17, og gennem en anden ventilspalte, der af grænses mellem randdelen 18 og ventilsædet 19. Følgelig er alle kamrene 20, 105 og 106 udsat for vakuum, når ventillegemet 15 er i sin i fig. 11 viste åbne stilling.In the starting position of the apparatus, the three-way valve 90 connects valve chamber 93 with the atmosphere through conduit 91, so that valve chamber 93 is subjected to atmospheric pressure which presses the resilient lower diaphragm 86 upwardly so that the resilient disc 20 of valve member 84 is pressed tightly with the lower edge 89 of discharge tube 12. as shown in FIG. 11. The valve 29 connects the air inlet pipe 35 to the vacuum line 74 so that the annular member 75 formed by the elastic gutter member 76 is subjected to vacuum whereby this gutter member will be in its collapsed condition 25 shown in FIG. 11. As the valve body 15 is supported by the gutter member 76, the valve body 15 is in its open position as shown in FIG. 11. The inner space of the housing 10 outside the valve body 15 is divided by the skirt 68 into an inner and an outer annular chamber, 105 and 106. The inner chamber 105 is in constant communication 30 with the discharge space 13 and the vacuum line 14 through the connecting tube 78, and the inner and outer chambers 105 and 106 are interconnected both through the air gap 71 and through the foam openings 70. In the open position of the valve body 15, the measuring chamber 20 is furthermore connected to the inner chamber 105 through a lower valve gap bounded between the rim portion 16 and the valve seat. 17, and through another valve slot bounded between the rim portion 18 and the valve seat 19. Accordingly, all of the chambers 20, 105 and 106 are subjected to vacuum when the valve body 15 is in its in FIG. 11.

17 1U54217 1U542

En strøm af væske eller mælk, der gennem væskeindløbsrøret eller -ledningen 11 føres tangentialt ind i væskeindløbsrummet 32, strømmer nedefter gennem filtreringsspalten 34 som et væsketæppe, som det er beskrevet ovenfor i forbindelse med den i fig. 5 viste ud-5 førelsesform. Den indstrømmende væske fortsætter nedefter forbi den savtakkede kantdel 69 på skørtet 68 og forbi det ringformede ventilsæde 17 og ind i målekammeret 20. Når væskeniveauet i målekammeret stiger, vil svømmeren eller flydeorganet 30 blive bevæget opefter. Når flydeorganet når en øvre stilling, i hvilken magnetorganet 10 25 ligger på samme niveau som det øverste af reed-relæerne, vil dette relæ blive aktiveret og frembringe et udgangssignal, der bringer tregangsventilen 29 til at afbryde forbindelsen med vakuumledningen 74 og etablere forbindelse med atmosfæren gennem ledningen 73.A stream of liquid or milk which is introduced tangentially through the liquid inlet tube or conduit 11 into the liquid inlet space 32 flows downwardly through the filtration slot 34 as a liquid blanket as described above in connection with the one shown in FIG. 5. The flowing fluid continues downward past the sawed edge portion 69 of the skirt 68 and past the annular valve seat 17 and into the measuring chamber 20. As the fluid level in the measuring chamber increases, the float or float member 30 will be moved upward. When the float means reaches an upper position in which the magnetic member 10 25 is at the same level as the upper of the reed relays, this relay will be activated and produce an output signal which causes the three-way valve 29 to disconnect from the vacuum line 74 and establish connection with the atmosphere. through wire 73.

Der vil således blive ført atmosfæretryk til det ringformede rum 75 15 gennem røret 35, hvorved det rendeformede organ 76 ekspanderes som vist i fig. 12, og ventillegemet 15, der understøttes af det rendeformede organ 76, løftes til sin lukkede stilling, i hvilken såvel den øverste ventil 18, 19 som den nederste ventil 16, 17 er lukket. Envejs- eller kontraventilen 80 udsættes så for atmosfære-20 tryk og åbnes, så at også målekammeret 20 udsættes for atmosfæretryk. Udløbsrøret 12 lukkes af ventilindretningen 83, medens omløb skanalen 96 forbinder målekammeret 20 med væskekammeret 94, der er under vakuum. Følgelig vil væsken eller mælken blive presset ud af målekammeret gennem omløbskanalen, der har et lille tværsnits-25 areal, og væske vil blive suget fra kammeret 94 og returneret til indløbsrummet gennem returledningen 97. Denne indledende langsomme udtømningsoperation, under hvilken væsken eller mælken udsættes for atmosfæretryk, bidrager til undertrykkelse af skum. Under den indledende udtømning vil væskeniveauet i målekammeret 20 og dermed 30 flydeorganet 30 synke langsomt. Når magnetorganet 25 har nået det samme niveau som niveauet for det næste reed-relæ 26, aktiveres dette relæ, så at der frembringes et udgangssignal, der bringer ventilen 90 til at afbryde forbindelsen mellem ventilkammeret 93 og atmosfæren og at etablere forbindelse med vakuumledningen 92. Der-35 ved bevæges ventilorganet 84 til sin åbne stilling, og den i måle kammeret 20 tilbageværende væskemængde udtømmes gennem udløbsledningen 12. Når flydeorganet 30 har nået den i fig. 11 viste stilling, 144542 18 i hvilken magnetorganet 25 befinder sig på samme niveau som det nederste reed-relæ 26, vil dette reed-relæ blive aktiveret, så at der frembringes et udgangssignal, der bringer ventilen 29 til at føre vakuum til det ringformede rum 75, hvorved det rendeformede 5 organ 76 bevæges til sin i fig. 11 viste sammensunkne stilling. Da ventillegemet 15 understøttes af det rendef ormede organ 76, bevæges dette ventillegeme til sin nederste åbne stilling, og boringen 77 sikrer, at gastrykket inde i det mellemrum, der af grænses mellem det rendeformede organ 76 og ventillegemet 15's øverste endevæg, 10 er det samme som trykket i det ringformede kammer 105. Udgangssignalet fra det nederste relæ 26 bevirker også, at ventilen 90 udsætter ventilkammeret 93 for atmosfæretryk, så at udløbsrøret 12 lukkes af ventilindretningen 82. Apparatet er nu i sin udgangsstilling, og den netop beskrevne funktion kan gentages.Thus, atmospheric pressure will be applied to the annular space 75 15 through the tube 35, whereby the gutter member 76 is expanded as shown in FIG. 12, and the valve body 15 supported by the gutter member 76 is lifted to its closed position, in which both the upper valve 18, 19 and the lower valve 16, 17 are closed. The one-way or non-return valve 80 is then subjected to atmospheric pressure and opened so that the measuring chamber 20 is also subjected to atmospheric pressure. The outlet pipe 12 is closed by the valve device 83, while the bypass passage 96 connects the measuring chamber 20 to the liquid chamber 94 which is under vacuum. Accordingly, the liquid or milk will be squeezed out of the measuring chamber through the orifice having a small cross-sectional area and liquid will be sucked from the chamber 94 and returned to the inlet space through the return line 97. This initial slow discharge operation, during which the liquid or milk is subjected atmospheric pressure, contributes to foam suppression. During the initial discharge, the liquid level in the measuring chamber 20, and thus the flow means 30, will sink slowly. When the magnetic means 25 has reached the same level as the level of the next reed relay 26, this relay is activated to produce an output signal which causes the valve 90 to disconnect the valve chamber 93 and the atmosphere and establish connection with the vacuum line 92. Thereby, the valve member 84 is moved to its open position and the amount of liquid remaining in the measuring chamber 20 is discharged through the outlet line 12. When the float member 30 has reached the position shown in FIG. 11, in which the magnetic member 25 is at the same level as the lower reed relay 26, this reed relay will be actuated to produce an output signal which causes the valve 29 to vacuum the annular space. 75, whereby the gutter-shaped member 76 is moved to its position in FIG. 11. As the valve body 15 is supported by the gutter member 76, this valve member is moved to its lower open position and the bore 77 ensures that the gas pressure within the space bounded between the gutter member 76 and the upper end wall of the valve body 15 is the same. as the pressure in the annular chamber 105. The output of the lower relay 26 also causes the valve 90 to expose the valve chamber 93 to atmospheric pressure so that the outlet tube 12 is closed by the valve device 82. The apparatus is now in its initial position and the function just described can be repeated.

1515

Man vil se, at det beskrevne apparat fungerer således, at der fra målekammeret 20 udtømmes væske i nøjagtigt afmålte portioner, der har i hovedsagen samme masse eller vægt. Følgelig kan den totale masse af den væske, der passerer gennem apparatet, beregnes ved, 20 at man tæller antallet af portioner og multiplicerer dette tal med vægten eller massen af hver portion. Når den væskestrøm, der føres til apparatet, standser, kan apparatet imidlertid indeholde en restmængde væske, der ikke er tilstrækkelig til opnåelse af det niveau inde i målekammeret 20, der starter udtømningsoperationen. Udtøm-25 ningen af en sådan restmængde væske fra målekammeret kan startes ved manuel betjening af kontakten 42. Denne betjening af kontakten 42 bringer ventilen 29 til at føre atmosfæretryk til det ringformede rum 75, medens ventilindretningen 83 forbliver i sin lukkede stilling.It will be seen that the apparatus described functions to discharge fluid from the measuring chamber 20 into precisely metered portions having substantially the same mass or weight. Accordingly, the total mass of the liquid passing through the apparatus can be calculated by counting the number of portions and multiplying that number by the weight or mass of each portion. However, when the liquid flow supplied to the apparatus stops, the apparatus may contain a residual amount of liquid which is not sufficient to attain the level inside the measuring chamber 20 which starts the discharge operation. The discharge of such residual liquid from the measuring chamber can be started by manually operating the switch 42. This operation of the switch 42 causes the valve 29 to apply atmospheric pressure to the annular space 75 while the valve device 83 remains in its closed position.

Den restmængde væske, der indeholdes i målekammeret 20, vil da 30 blive udtømt gennem omløbskanalen 96, og mængden af den væske, der udtømmes fra målekammeret, samt af den væske, der er tilbage i kamrene 105 og 106, kan bestemmes af den elektroniske enhed 38 på basis af det tidsrum, der forløber fra det øjeblik, hvor kontakten 42 betjenes, til det øjeblik, hvor det nederste reed-relæ 26 aktiveres 33 af magnetorganet 25. For at fjerne den væske, der er tilbage i kamrene 105 og 106, kan apparatet derefter automatisk foretage et antal, f.eks. seks, efter hinanden følgende udtømningsoperationer. Den 144542 19 totale mængde af den væskestrøm, der har passeret apparatet, kan angives af den digitale indikeringsindretning 39, og apparatet er nu klart til en ny måling.The residual amount of liquid contained in the measuring chamber 20 will then be discharged through the bypass channel 96 and the amount of the liquid discharged from the measuring chamber as well as the liquid remaining in the chambers 105 and 106 can be determined by the electronic unit. 38 on the basis of the time elapsing from the moment the switch 42 is operated to the moment when the lower reed relay 26 is actuated 33 by the magnetic means 25. To remove the liquid remaining in the chambers 105 and 106, the apparatus can then automatically make a number, e.g. six consecutive depletion operations. The total amount of fluid flow which has passed the apparatus may be indicated by the digital indicating device 39 and the apparatus is now ready for a new measurement.

5 Det i fig. 11 viste apparat kan være forsynet med en prøveud tagningsindretning som den, der er vist i fig. 14, og som fungerer på i hovedsagen samme måde som den prøveudtagningsindretning, der er beskrevet i forbindelse med den i fig. 5 viste udførelsesform.5 The embodiment of FIG. 11 may be provided with a sampling device such as that shown in FIG. 14, which operates in substantially the same manner as the sampling device described in connection with the one shown in FIG. 5.

10 Ventilerne 29 og 90 kan være af den type, der er vist i fig. 13.The valves 29 and 90 may be of the type shown in FIG. 13th

Den viste ventilmekanisme har et hus 107, der afgrænser et indre ventilkammer 108, som er i forbindelse med den kanal, der dannes af rørstudsen 99. Huset afgrænser også en vakuumkanal 109, der er forbundet med vakuumledningen 74, og en kanal 110, der er i 15 forbindelse med atmosfæren gennem den i fig. 11 viste ledning 73.The valve mechanism shown has a housing 107 defining an inner valve chamber 108 which is in communication with the duct formed by the pipe nozzle 99. The housing also defines a vacuum duct 109 connected to the vacuum conduit 74 and a duct 110 which is in connection with the atmosphere through the one shown in FIG. 11 shown 73.

Kanalerne 109 og 110 udmunder i ventilkammeret 108 i modsatte retninger og er omgivet af ventilsæder, henholdsvis 111 og 112. Et ventilorgan 113 er ophængt i en membran 114 og et fjederorgan 115, således, at det kan bevæges mellem en åben stilling, der er vist i 20 fig. 13, og en lukket stilling, i hvilken en elastisk tætningsskive 116 tæt indgriber med ventilsædet 111 og lukker vakuumkanalen 109. På lignende måde styres ventilsædet 112 af et ventilorgan 117, der er ophængt i en membran 118 og presses mod sin lukkede stilling af en skruefjeder 119, i hvilken stilling en tætningsskive 120 tæt 25 indgriber med ventilsædet 112 og lukker kanalen 110. Ventilorganet 117 kan bevæges til en åben stilling (mod højre i fig. 13) ved tilførsel af strøm til en magnetspole 121, og ventilorganet 113 bevæges samtidigt til sin lukkede stilling under indvirkning af fjederkraften fra fjederorganet 115. Når strømtilførslen til magnetspolen 121 af- 30 brydes, vil ventilorganet 117 vende tilbage til sin lukkede stilling under indvirkning af fjederkraften fra skruefjederen 119, og ventilorganet 113 vil samtidig blive bevæget til sin åbne stilling mod fjederkraften fra fjederorganet 115, idet aksialt bevægelige afstandsstifter 122 sikrer en konstant aksial indbyrdes afstand mellem ven-35 tilorganerne 113 og 117.The ducts 109 and 110 open in the valve chamber 108 in opposite directions and are surrounded by valve seats 111 and 112, respectively. A valve member 113 is suspended in a diaphragm 114 and a spring member 115 so that it can be moved between an open position shown. in FIG. 13, and a closed position in which an elastic sealing disk 116 engages tightly with the valve seat 111 and closes the vacuum duct 109. Similarly, valve seat 112 is controlled by a valve member 117 suspended in a diaphragm 118 and pressed against its closed position by a coil spring. 119, in which position a sealing disk 120 seals 25 closely with the valve seat 112 and closes the channel 110. The valve member 117 can be moved to an open position (to the right in Fig. 13) by supplying current to a solenoid coil 121, and the valve member 113 is simultaneously moved to its closed position under the action of the spring force from the spring member 115. When the power supply to the magnetic coil 121 is interrupted, the valve member 117 will return to its closed position under the spring force from the coil spring 119, and the valve member 113 will simultaneously be moved to its open position towards the spring force from the spring member 115, axially movable spacers 122 ensuring a constant axial spacing between the friends means 113 and 117.

144542 20144542 20

Det er klart, at der kan foretages forskellige modifikationer og ændringer ved de ovenfor beskrevne udførelsesformer. Eksempelvis kan der anvendes forskellige typer af ventilindretninger til styring af væskeudtømningen fra målekammeret 20 i portioner med i hoved-5 sagen samme vægt. Det skal også bemærkes, at selv om opfindelsen specielt er blevet beskrevet i forbindelse med måling af en mælkestrøm i et malkeanlæg, kan apparatet ifølge opfindelsen også anvendes til måling af en strøm af en hvilken som helst anden væsketype. Endvidere kan væsken udtømmes fra målekammeret ved hjælp *0 af trykgas, så at apparatet ikke nødvendigvis skal drives ved hjælp af vakuum, der tilføres fra en vakuumkilde.It is to be understood that various modifications and modifications may be made to the embodiments described above. For example, different types of valve devices can be used to control the liquid discharge from the measuring chamber 20 in portions having substantially the same weight. It should also be noted that although the invention has been specifically described in connection with the measurement of a milk flow in a milking plant, the apparatus according to the invention can also be used for measuring a flow of any other liquid type. Furthermore, the liquid can be discharged from the measuring chamber by means of * 0 of pressurized gas, so that the apparatus does not necessarily have to be operated by vacuum supplied from a vacuum source.

Claims (8)

1. Fremgangsmåde til måling af en væskestrøm, der gennem en indløbskanal (11) føres ind i et målekammer (20), der indeholder 5 en svømmer (21, 22; 30), medens væsken portionsvis udtømmes fra målekammeret gennem en udløbskanal (12), idet udtømningen af hver portion igangsættes som svar på bevægelse af svømmeren til et øverste niveau, og antallet af portioner, der udtømmes, tælles, kendetegnet ved, at udtømningen af hver portion 10 forårsages ved, at indløbskanalen (11) lukkes, og at målekammeret (20) udsættes for et gastryk, der væsentligt overstiger trykket ved udløbskanalens udløbsende.A method for measuring a fluid flow introduced through an inlet passage (11) into a measuring chamber (20) containing a float (21, 22; 30) while the liquid is discharged portionwise from the measuring chamber through an outlet passage (12). the discharge of each portion being initiated in response to movement of the swimmer to an upper level and the number of servings being discharged being counted, characterized in that the discharge of each portion 10 is caused by the inlet channel (11) being closed and the measuring chamber (20) is subjected to a gas pressure which substantially exceeds the pressure at the outlet end of the outlet duct. 2. Fremgangsmåde ifølge krav 1, hvor udløbskanalens (12) udløbsende 15 står under vakuum, kendetegnet ved, at udtømningen forårsages ved, at målekammeret (20) udsættes for atmosfæretryk.Method according to claim 1, wherein the outlet end 15 of the outlet duct (12) is under vacuum, characterized in that the discharge is caused by exposure of the measuring chamber (20) to atmospheric pressure. 3. Fremgangsmåde ifølge krav 1 eller 2, hvor indløbskanalen (11) 20 styres af en indløbsventil (15), der er bevægelig mellem en åbne- og en lukkestilling, kendetegnet ved, at indløbsventilen (15) bevæges til sin lukkede stilling under indflydelse af det gastryk, der tilføres målekammeret (20). 25Method according to claim 1 or 2, wherein the inlet duct (11) 20 is controlled by an inlet valve (15) movable between an open and a closed position, characterized in that the inlet valve (15) is moved to its closed position under the influence of the gas pressure supplied to the measuring chamber (20). 25 4. Fremgangsmåde ifølge et hvilket som helst af kravene 1-3, hvor tilførslen af gastryk til målekammeret (20) påbegyndes, når svømmeren er blevet bevæget opefter til et første niveau, kendetegnet ved, at væsken derefter indledningsvis 30 udtømmes fra målekammeret gennem en lille omløbsåbning (96), der står i forbindelse med væskeindløbskanalen, og at der etableres forbindelse mellem målekammeret og udløbskanalens udløbsende, når svømmeren har nået et nedre andet niveau, hvorefter den væskeportion, der er tilbage i målekammeret, udtømmes gennem udløbskanalen. 35 144542Method according to any one of claims 1-3, wherein the supply of gas pressure to the measuring chamber (20) is started when the float has been moved upwards to a first level, characterized in that the liquid is then initially discharged from the measuring chamber through a small orifice (96) communicating with the liquid inlet channel and establishing a connection between the measuring chamber and the outlet end of the outlet channel when the swimmer has reached a lower second level, after which the liquid portion remaining in the measuring chamber is discharged through the outlet channel. 35 144542 5. Fremgangsmåde ifølge krav 4, kendetegnet ved, at funktionen af en udløbsventil (84), der findes i væskeudløbskanalen (12) og er bevægelig mellem en åbne- og en lukkestilling, også styres af svømmerens (30) 5 stilling i målekammeret (20), og at den nævnte forbindelse etableres ved, at udløbs ventilen bevæges fra sin lukke- til sin åbnestilling.Method according to claim 4, characterized in that the function of an outlet valve (84), which is located in the liquid outlet channel (12) and is movable between an open and a closed position, is also controlled by the position of the float (30) in the measuring chamber (20). ), and that said connection is established by moving the outlet valve from its closing to its open position. 6. Fremgangsmåde ifølge krav 4 eller 5, 10 kendetegnet ved, at mængden af en eventuel sidste brøkdel af en væskeportion, der er ført ind i målekammeret, udtømmes gennem omløbsåbningen (96) og bestemmes på basis af det tidsrum, der er anvendes til udtømning af denne sidste brøkdel fra målekammeret. 15Process according to Claim 4 or 5, 10, characterized in that the amount of any last fraction of a liquid portion introduced into the measuring chamber is discharged through the orifice (96) and is determined on the basis of the time used for discharge. of this last fraction from the measuring chamber. 15 7. Apparat til måling af en væskestrøm og med et målekammer (20), der har en væskeindløbskanal (11) til modtagelse af denne strøm, en svømmer (21, 22, 30), der er bevægeligt anbragt i dette kammer, udtømningsorganer (15, 29, 83, 90) til udtømning af væske fra måle-20 kammeret gennem en væskeudløbskanal (12) som svar på bevægelse af svømmeren til et øverste niveau og organer (28, 38) til at tælle antallet af væskeportioner, der udtømmes fra målekammeret, kendetegnet ved, at udtømningsorganerne omfatter organer (15) til lukning af indløbskanalen og organer (29, 83, 90) til 25 at udsætte målekammeret (20) for et gastryk, der væsentligt overstiger trykket ved udløbskanalens (12) udløbsende.Apparatus for measuring a fluid flow and having a measuring chamber (20) having a liquid inlet channel (11) for receiving this flow, a swimmer (21, 22, 30) movably arranged in this chamber, discharge means (15) , 29, 83, 90) for discharging liquid from the measuring chamber through a liquid outlet channel (12) in response to movement of the swimmer to an upper level and means (28, 38) for counting the number of liquid portions discharged from the measuring chamber , characterized in that the discharge means comprise means (15) for closing the inlet duct and means (29, 83, 90) for exposing the measuring chamber (20) to a gas pressure which substantially exceeds the pressure at the outlet end of the outlet duct (12). 8. Apparat ifølge krav 7, kendetegnet ved, at lukkeorganerne omfatter et ventil-30 legeme (15), der tjener til at styre indløbskanalen, og som er indrettet til under indvirkning af det til målekammeret (20) førte gastryk at blive bevæget til en stilling, i hvilken det lukker indløbskanalen, og at organerne til at udsætte målekammeret for et gastryk omfatter en gasventil (29, 83, 90), der styres således af 35 svømmeren (21, 22, 30), at gastrykket føres til målekammeret, når svømmeren har nået en øvre stilling.Apparatus according to claim 7, characterized in that the closing means comprise a valve body (15) which serves to control the inlet duct and which is adapted to be moved to a measuring pressure (20) under the influence of the gas chamber (20). a position in which it closes the inlet duct and the means for exposing the measuring chamber to a gas pressure comprise a gas valve (29, 83, 90) controlled so by the float (21, 22, 30) that the gas pressure is fed to the measuring chamber when the swimmer has reached an upper position.
DK466379A 1978-11-03 1979-11-02 METHOD AND APPARATUS FOR MEASURING A FLUID FLOW DK144542C (en)

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