SE190814C1

SE190814C1 -

Info

Publication number: SE190814C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: L Bergman och A Kemmer Foreliggande uppfinning hanfor sig i forsta hand till ett satt och en anordning for proportionering av tvd medier med avseende pa deras inbordes viktsforhallande samt a-vser speciellt finkontroll av namnda viktsforhallande. Inventors: L Bergman and A Kemmer The present invention relates primarily to a method and a device for proportioning two media with respect to their inboard weight ratio and also provides particular fine control of said weight ratio.

Sattet i enlighet med uppfinningen utmarkes vasentligen genom att de bada medierna tillforas intermittent till var sin proportioneringsbehallare, vilka uppbaras sa av en vaganordning, att de vasentligen balansera varandra, att 'medierna utmatas vasentligen kontinuerligt frail namnda behallare pa ctt sadant satt, att mediumnivaerna i respektive behallare variera Indian ett ovre och ett undre gransvarde under bibehallande av ett i huvudsak oforandrat jamviktslage hos vaganordningen, att vaganordningens jamviktslage vid mediumnivaernas ena granslage i behMlarna jamfores med vaganordningens jamviktslage vid mediumnivaernas andra granslage i behallarna, samt att skillnaden mellan de hada jamviktslagena uppmates °eh utnyttjas for reglering av mediernas proportioner. The method according to the invention is substantially marked by the both media being fed intermittently to their respective proportioning containers, which are supported by a carriage device so that they substantially balance each other, that the media are discharged substantially continuously from said container in such a way that the medium levels in each containers vary an upper and a lower spruce value while maintaining a substantially unchanged equilibrium position of the vaginal device, that the equilibrium position of the vaginal device at one of the spheres of the medium levels in the containers is compared with the equilibrium of the vaginal device at the other spans of the medium levels in the containers. used to regulate the proportions of the media.

Anordningen i enlighet :med -uppfinningen kannetecknas vasentligen ay tva proportioneringsbehallare, som aro sa anordnade pa en vagbalans pa iimse sidor oiri dennas svangningsaxel loch med avstand fran denna motsvarande den onskade proportioneringen, att de i huvudsak balansera varandra, ay organ for til1f8rsel av namnda medier till respektive behallare, ay organ f8r utmatning av medierna fran res:pektive behallare, av organ fiir sadan reglering av mediumtillforseln till och mediumutmatningen fran behallarna, att mediumnivaerna i dessa variera mellan ett ovre och ett undre gransvarde, samt ay en till vaganordningen kopplad regulator, som är anordnad att reglera mediumutmatningen frail behallarna vane gang mediumnivan i dessa uppnatt ett ay namnda gransvarden. The device according to the invention is essentially characterized by two proportioning containers, which are so arranged on a vagal balance on either side of its axis of rotation and at a distance from it corresponding to the desired proportioning, that they substantially balance each other, a means for supplying said media. to the respective container, ay means for discharging the media from the respective container, by means for regulating the medium supply to and the medium output from the containers, that the medium levels therein vary between an upper and a lower spruce value, and ay a regulator connected to the carriage device, which is arranged to regulate the medium discharge frail the containers as usual the medium level in these has reached an ay called spruce.

Ytterligare sardrag hos och fordelar med uppfinningen framgar arv efterfoljande detaljbeskrivning av en foredragen utforingsform, Aiken sisom icke begransande exempei askadliggores pa bifogade ritningar. I utforingsexemplet blandas tva vatskor, men uppfinningen kan aven anvandas for annat lattrorligt, t. ex. korn- eller pulverformigt material. I det foreliggande exemplet utpurnpas de bada medierna medelst kolvpumpar, som dro drivna av en gemensam axel och yars kapaciteter aro aypassade efter den onskade proportionen melIan mediernas yikter. Med en speciellt anordnad justerskruv, ett spjall eller dylikt, vara lage installes av en servomotor, for pumpen till ett av medierna kan enligt uppfinningen en finjustering ay dettas flode ske. Varken namnda pumpar, justerskruven eller serivomotorn visas pa ritningarna. Further features and advantages of the invention will become apparent from the following detailed description of a preferred embodiment, which is shown by way of non-limiting example in the accompanying drawings. In the exemplary embodiment, two waders are mixed, but the invention can also be used for other latrative, e.g. granular or powdered material. In the present example, the two media are pumped out by means of piston pumps, which are driven by a common shaft and their capacities are adapted to the desired proportion between the yarts of the media. With a specially arranged adjusting screw, a damper or the like, it is installed by a servomotor, for the pump to one of the media, according to the invention, a fine adjustment of its flow can take place. Neither the pumps, the adjusting screw nor the servomotor mentioned are shown in the drawings.

Fig. 1 pa dessa askadliggor en yaganordfling fOr genomforande av proportioneringen, och fig. 2 forestaller ett elektriskt kopplingsschema Over den till proportioneringsanordningen horande regulator n. Fig. 1 shows a shaft device flap for carrying out the proportioning, and Fig. 2 represents an electrical wiring diagram of the regulator n belonging to the proportioning device.

Enligt fig. 1 Or en vagbalans 101 med egglagring upplagd i ett stativ 102. I sina hada ytterandar uppbar vagbalansen, likasa med egglager 103, 104, tva proportioneringsbehallare B I respektive B II. Vagbalansens 101 utyaxlingsforhallande, d. v. s. forhallandet mellan haystangsarmarnas langder, ar noga avpassat efter dot onskade blandningsforhallandet. Orn detta skall kunna varieras, kan en av de yttre eggarna 103, 104 pa balansen 101 gams justerbar med avseende pi sitt lage i havstangsarmens langdriktning. liven behallarnas B I, BII volymer aro lampligen avpassade efter 2— — blandningsforhallandet. Behallarna styras nedtill av styrlankar 105, 106, som motverka pendlingar hos behallarna. According to Fig. 1 Or a vagal balance 101 with edge bearing mounted in a stand 102. In its had outer ends the vaginal balance, like with edge bearings 103, 104, carried two proportioning containers B I and B II respectively. The displacement ratio of the carriage balance 101, i.e. the ratio between the lengths of the haystack arms, is carefully adapted to the desired mixing ratio. If this is to be varied, one of the outer edges 103, 104 of the balance 101 may be adjustable with respect to its bearing in the longitudinal direction of the sea rod arm. the volumes of the containers B I, BII are suitably adapted to the 2— - mixing ratio. The containers are guided at the bottom by guide links 105, 106, which counteract oscillations of the containers.

Fran en punkt 107 pa vagbalansen 101, vars avstand till mitteggen är avpassat med hansyn :till den erforderliga kansligheten, utgar en. dragstang 108, som är ansluten till en visare- apparat 109, vars visare star pa en skalas 1 mittlage (eller ett annat lampligt lage), da respektive behallare innehaller den minsta forekommande mediummangden eller alternativt den avsedda :maximimangden. Visareapparatens axel 111 star i forbindelse med en aekumulerande registrator, vilken är av samma slag som den i svenska patentet 123 638 beskrivna registreringsanordningen. From a point 107 on the vaginal balance 101, the distance to the middle edge is adapted with the view: to the required probability, one. drawbar 108, which is connected to a pointer device 109, the pointer of which stands on a middle layer (or other suitable layer) of a scale, as each container contains the minimum amount of medium or alternatively the intended: maximum amount. The shaft 111 of the pointer apparatus is connected to an accumulating recorder, which is of the same type as the recording device described in Swedish patent 123,638.

I enlighet med detta patent registreras i korthet nettovikten av en last, som efter en vagningsoperation avlagsnats frail en vag, pa foljande satt. En vridbar matskiva, som uppbar ett anslag och vars vridningsvinkel är proportionell mot totalbelastningen pa en vagskM, fastlases i det vridningslage, till vilket den vridits under inverkan av en total bruttobelastning. Sedan skivan lasts, framvrides en sokararm, vars vridningsaxel är koaxiell med matskivans axel och.medelst en friktianskoppling är kopplad till en i ett registrerande eller ackumulerande rdkneverk ingkende axel, fran ett noll-age till ett lage, i vilket sOkararmen slar an mot matskivans anslag. Under denna sOkararmens vridningsrorelse ãr friktionskopplingen tillslagen, sa att rakneverksaxeln kringvrides och rakneverket utfor en registrering av bruttovikten. Darefter lossas friktionskopplingen, sa att den erhallna bruttoregistreringen tills vidare kvarstar i rakneverket. Sedan aterfares sokararmen till sift noll-lage, varefter mitskivan friges oeh lasten kan avlagsnas mer eller mindre fullstandigt fran vagskalen, st att matskivan atergar till ett lage nara eller sammanfallande med sift nall-lage. Under den efterfOljande matningen av taravikten, dã. matskivan med silt anslag framvrides en mindre vinkel, framvrides forst sokararmen med friktionskopplingen f ortfarande lossad tills sokararmen any° kommer i kontakt med matskivans anslag. I detta ldge sib's friktionskopplingen till, varefter sokararmen aterfores till silt,och harvid aterfor rakneverket med ett mot taravikten svarande belopp, som salunda subtraheras fran bruttovikten, sã att en med nettovikten Overensstammande registrering erhalles i rakneverket. In accordance with this patent, the net weight of a load which has been unloaded from a wagon after a weighing operation is briefly recorded as follows. A rotatable feed plate, which carried a stop and whose angle of rotation is proportional to the total load on a cradle M, is fixed in the rotational stroke to which it has been rotated under the influence of a total gross load. After the disc is loaded, a search arm is rotated, the axis of rotation of which is coaxial with the axis of the food disc and by means of a friction coupling is coupled to a shaft engaging in a recording or accumulating rudder, from a zero age to a bearing in which the search arm strikes the abutment disc. . During this rotational movement of the search arm, the friction clutch is switched on, so that the razor shaft is rotated and the razor performs a registration of the gross weight. Then the friction clutch is loosened, so that the obtained gross registration remains in the rake for the time being. Then the search arm is returned to the zero-layer sieve, after which the center plate is released and the load can be removed more or less completely from the vaginal shell, so that the food plate returns to a layer close to or coincides with the zero-layer sieve. During the subsequent feeding of the tara weight, dã. the food plate with silt stop is turned a small angle, first the search arm is turned with the friction clutch still loosened until the search arm any ° comes into contact with the food disc stop. In this ldge sib's friction coupling to, after which the search arm is returned to silt, and then returns the rake with an amount corresponding to the tare weight, which is thus subtracted from the gross weight, so that a registration corresponding to the net weight is obtained in the rake.

I foreliggande fall är emellertid den till rakneverket i registreringsanordningen enligt namnda patent utga.ende axeln i stallet forbunden med en vridpotentiometer POT i fig. 2, som ersatter rakneverket i den ackumulerande registratorn i svenska patentet 123 638 och som anvandes for alt styra servomotorn. In the present case, however, the shaft extending to the rake in the registration device according to the said patent is connected in the stable to a rotary potentiometer POT in Fig. 2, which replaces the rake in the accumulating registrar in Swedish patent 123 638 and which is used to control the servomotor.

Fran proportioneringsbehallarna B I, B II leda ror 112, 113 till pumparnas sugsida. Till behallarna leda tilloppsror 114, 115, vars ka pacitet av skit, som framgar av det foljande, är stOrre an pumparnas. Tilloppet till respektive behallare B I, B II .manovreras med elst magnetventiler 116, 117 med manOverspolar MV I respektive MV II, som visas i fig. 2. I behallarnas botten finnas installbara nivakontroller 118, 119, som p averkas i beroende av vatsketrycket i behallarna och manOvrera var sin elektrisk omkopplare NK I respektive NK II, som styr omstallningen av magnetventilerna 116 respektive 117 vid ett visst install- bart vatsketryck i karlen B I, B II. From the proportioning tanks B I, B II, pipes 112, 113 lead to the suction side of the pumps. To the containers lead inlet pipes 114, 115, the capacity of which, as can be seen from the following, is greater than that of the pumps. The inlet to the respective tanks BI, B II is operated with electric solenoid valves 116, 117 with control coils MV I and MV II, respectively, as shown in Fig. 2. At the bottom of the tanks are installable level controls 118, 119, which are actuated depending on the liquid pressure in the tanks. and operate each of their electrical switches NK I and NK II, respectively, which control the conversion of the solenoid valves 116 and 117, respectively, at a certain installable liquid pressure in the man BI, B II.

Vatsketillforseln till de bada karlen sker Iran (icke visade) forradstankar under sjalvtryck, och den proportionella utmatningen Iran behallarna styres i det visade utforingsexemplet medelst visareapparaten 109 i fig. 1 och den till densamma horande regleringskretsen enligt fig. 2. I sistnamnda figur beteeknar 1-26 olika punkter i regleringskretsen, varyid 0 Or nolledningen i ett nat, 1 är en f asledning, 23, 24 klammor, som inga i en slutande larankrets, t. ex. for en siren, 25, 26 kldmmor, som inga i en brytande larmkrets, I. ex. for bortkoppling av regulatorn, Br bruttovagningslage, T taravagningslage, M en. i registratorn inghende trefasmotor, A, B, C till servomotorn for pumpens stall- skruv .eller spj all ledande klammor, R, S. T fasklammor for motorn M, MV I .manoverspole for ventilen 116 for material I, MV II •manoverspole for ventilen 117 for material II, NK I omkopplare for den ovre nivakontrollen for material I, NK II omkopplare fOr den ovre nivakontrollen for material II, POT en till registratorn horande potentiometer, R 1 ett forsta hjalpreld, R 2 ett andra hjalprela, R 3 ett tredje hjalpreld, som bryter strtimmen till MV I och MV II, R 3A ett garde hjalprela, som bortkopplar potentiometern POT under utmatningen av medium fran behallarna, R 4 ett femte hjalprela f5r erforderliga larmfunktioner, vilket trader i funktion vid fel, T 1 tidrelä med fordrojt tillslag for bruttoregistrering, T 2 tidrela med fordrojt tillslag for avsOkningstid, d. v. s. den tid utmatningen av medium under en arbetscykel fran behallarna kraver, T 3 tidrela med fordrojt tillslag for larm, vars installningstid ar nagot langre an normal funktionstid, d. v. s. sa lang, att relaet. normalt ieke utlOses, - -3 MB I ornkopplare i registratorn, MB II brytare i registratorn; bryter strax innan tararegistrering .slutforts, SL 1 signallampa for manOverstrOm; lyser nar regulatorn är inkopplad, SL 2 signallampa, som indikerar att bruttoregistrering p agar, SL 3 signallampa, som indikerar att proportionskontroll och tararegistrering 'Azar, SL 4 signallampa for larm, och K 3-pollig kontaktor och rela for registratormotorn M. The liquid supply to the baths takes place in Iran (not shown) storage tanks under self-pressure, and the proportional output of the Iran containers is controlled in the illustrated embodiment by means of the indicator 109 in Fig. 1 and the control circuit belonging to it according to Fig. 2. In the latter figure denotes 1- 26 different points in the control circuit, varyid 0 Or the neutral line in one night, 1 is a phase line, 23, 24 clamps, which are not in a closing laran circuit, e.g. for a siren, 25, 26 kldmmor, as none in a breaking alarm circuit, I. ex. for disconnection of the regulator, Br gross weighting layer, T tare weighting layer, M en. three-phase motor included in the recorder, A, B, C to the servomotor for the pump's stable screw .or spear all conductive clamps, R, S. T phase clamps for the motor M, MV I .maneuvering coil for the valve 116 for material I, MV II valve 117 for material II, NK I switch for the upper level control for material I, NK II switch for the upper level control for material II, POT a potentiometer belonging to the registrar, R 1 a first auxiliary fire, R 2 a second auxiliary relay, R 3 a third auxiliary fire, which breaks the power hour to MV I and MV II, R 3A a guard auxiliary relay, which disconnects the potentiometer POT during the discharge of medium from the containers, R 4 a fifth auxiliary relay for required alarm functions, which operates in the event of a fault, T 1 timer relay with delayed switch-on for gross registration, T 2 time delay with delayed switch-on for scan time, ie the time the discharge of medium during a work cycle from the containers requires, T 3 time delay with delayed switch-on for alarm, whose installation time is somewhat longer than normal operating time, i.e. so long that the relay. normally not triggered, - -3 MB I switch in the registrar, MB II switch in the registrar; switches just before tare registration .slutforts, SL 1 signal lamp for manOverstrOm; lights up when the controller is switched on, SL 2 signal lamp, which indicates that gross registration is active, SL 3 signal lamp, which indicates that proportion control and tare registration 'Azar, SL 4 signal lamp for alarm, and K 3-pole contactor and relay for registrar motor M.

Nu skall proportioneringsanordningens verkningssatt beskrivas under speciell hanvisning till fig. 2. The mode of operation of the proportioning device will now be described with special reference to Fig. 2.

Manoverstrommen 1, 0 inkopplas over brytaren 1, 2, varvid signallampan SL 1 Slides. Over omkopplarna MB I, NK I och NK II slutas kretsarna 1, 2, 3, 5, 6, - 0 och 1, 2, 3, 8, 9, - 0, varvid magnetventilerna 116 och 117 oppnas genom att manoverspolarna MV I och MV II fa strom och material flakes 911 bada vagbehdllarna, vilka antagas vara tomma eller Mott delvis fyllda. Samtidigt startas pumparna for proportionell utmatning i tillverkningsprocessen. The control drum 1, 0 is switched on via the switch 1, 2, the signal lamp SL 1 Slides. Over the switches MB I, NK I and NK II the circuits 1, 2, 3, 5, 6, - 0 and 1, 2, 3, 8, 9, - 0 are closed, the solenoid valves 116 and 117 being opened by the control coils MV I and MV II fa strom and material flakes 911 bathe vagbehdllarna, which are assumed to be empty or Mott partially filled. At the same time, the pumps are started for proportional output in the manufacturing process.

Eftersom tillforselkapaciteten är mycket storre an utmatningskapaciteten, konimer mediummangden att Oka i hehallarna B I, B II. Da mediummangden i endera behallaren natt en viss hojd, motsvarande ett forutbestamt mediumtryck i ifragavarande behallare, omstalles motsvarande nivaomkopplare NK I eller NK II. Om NK I omstalles, brytes kretsen 3, 5 till magrietventilens 16 manoverspole MV I och slutes kretsen 3, 7 till hjalprela R 1. Da detta rela gar till, far det en hallkrets parallent med omkopplaren NK I. Ndmnda rad sluter kontakten 3, 11 i serie med tidrela. T 1 saint kontakten 2, 14 i serie med brytaren MB II i registratorn. Since the supply capacity is much larger than the output capacity, the medium quantity increases in the halls B I, B II. Since the amount of medium in either container reaches a certain height, corresponding to a predetermined medium pressure in the container in question, the corresponding level switch NK I or NK II is converted. If NK I is switched on, circuit 3, 5 is switched to the control valve MV I of the solenoid valve 16 and circuit 3, 7 is closed to auxiliary relay R 1. When this relay is switched on, it has a hall circuit parallel to switch NK I. The said line closes contact 3, 11 in series with tidrela. T 1 saint connector 2, 14 in series with switch MB II in the recorder.

Da strommen bryts till ventilens 116 man8- verspole MV I, stoppas tillforseln av mediet I, varvid mediumnivan i behallaren B I sjunker tills omkopplaren NK I atergar till laget 3, 5 loch oppnar magnetventilen 116 genom att manoverspolen MV I far strom. Nivan i behallaren B I kom.mer alltsa att Maas rid ett bestamt lage med ett visst toleransomrade. Det ovan beskrivna gaiter aven for det andra me-diet. Dâ aven mediumnivan for Ramada andra medium stigit, sa att nivaomkopplaren NK II slar Oin fran 3, 8 till 3, 10, sluts str8mkretsen genom manOverspolen hos hjalprela.et R 2, som aven far en hallkretsiparallellt med nivaomkopplaren NK II och som sluter kontakterna 11, 12 samt 14, 15. Harvid sluts dels en krets 1, 2, 14, 15, 16, - 0, varvid relaerna R 3 R 3A och T 3 magnetiseras, dels en krets 1, 2, 3, 11, 12, - 0, varvid tidreldet T 1 startar iach signallarnpan SL 2 tandes. Vid sin magnetisering bryter relict R 3 strommen till ventilernas 116 'och 117 manOverspolar MV I och MV II vid kontakterna 5, 6 respektive 8, 9, sã att mediumtillforseln till behallarna B I, B II upphor, samt sluter en halikrets 2, 15 i serie med brytaren MB II. Detta motsvarar j amviktstillstand rid fyllda behallare. Nar hada behallarna aro fyllda, stoppas ,salunda all mediumtillforsel och startas tidrelaet T 1. When the current is broken to the valve 116 M8 I of the valve 116, the supply of the medium I is stopped, whereby the medium level in the container B I drops until the switch NK I returns to the layer 3, 5 and opens the solenoid valve 116 by the control coil MV I receiving power. The level in the container B I means that Maas rides a certain team with a certain tolerance range. The gaiter also described above for the second medium. When the medium level of Ramada other medium also rises, so that the level switch NK II switches Oin from 3, 8 to 3, 10, the circuit is closed by the control coil of the auxiliary relay R 2, which also has a hall circuit parallel to the level switch NK II and which closes the contacts 11 , 12 and 14, 15. This closes a circuit 1, 2, 14, 15, 16, - 0, whereby the relays R 3 R 3A and T 3 are magnetized, and a circuit 1, 2, 3, 11, 12, - 0, whereby the time light T 1 starts in the signal field SL 2 tandes. During its magnetization, relict R 3 breaks the current to the valves 116 'and 117 of the valves MV I and MV II at the contacts 5, 6 and 8, 9, respectively, so that the medium supply to the containers BI, B II ceases, and closes a halicircle 2, 15 in series with switch MB II. This corresponds to a state of equilibrium in filled containers. When the containers have been filled, all medium supply is stopped and the time relay T 1 is started.

Da tidrelaet T 1 lopt ut, sluter kontakten T 1 kretsen 1, 2, 3, 13, - 0 och kontaktorn K startar motorn M i den till visareapparaten 109 hOrande ackumulerande registratorn, varvid jamviktstillstandet lies vaganordningen rid bruttovikt, d. v. s. fyllda behallare, avsokes medelst en i registratorn inghende avsokare i enlighet med vad som beskrivas i det namnda patentet. Avsokarens vinkelutslag, raknat frail vagens ena ytterlage, vilket utslag motsvarar vridningsvinkeln for visaren i visareapparten 109 frail skalans 110 noll-lage till visarens aktuella lage pa skalan rid bruttoregistreringen, overfores till potentiometer POT, som nu är elektriskt bortkopplad fran_ servomotorn for styrning av blandningsfOrhallandet eller viktsproportionen mellan medierna I och II genom att kontakten 11 3A är bruten. Da bruttoregistreringen utforts, gar registratorns omkopplare MB I Over frail bruttoregistreringslaget 2, 3 till tararegistreringslaget 2, 4. Harigenom brytes stromnaen till relaerna R 1, R 2 och T 1, vilka salunda falla. Sarntliga reldkontakter med beteckningen It 1, R. 2, och T 1 brytas salunda. Strommen slutes till signallampan SL 3 och tidrelaet T 2. Detta ãr instant for en tid, som motsvarar sankning av .mediumnivan fran det byre gransvardet till det undre gransvardet, vilket motsvarar ca 2/3 av maximinivan. Genom sankningen av nivan i behallarna slO. NK I och NK II Over till 3, 5 resp. 3, 8. Tidreldets kontakt T 2 sluter efter den installda tidsfordrOjningen kretsen 1, 2, 4, 13, - 0, varvid kontaktorn K ater gar till och registratormotorn M startar en tararegistrering. Det vinkelutslag, som nu erhalles pa skalan 110, overfores av visareapparaten 109 till potentiometern POT men med em-And rorelseriktning i forhallande till vridningsriktningen rid bruttoregistreringen. Potentiometeraxeln vrides salunda bakat en vinkel, som anotsvarar vinkeln mellan visarens aktuella 1Sge rid tararegistreringen och skalans 110 noll-lage. Detta tiilgâr i princip pa det salt, som beskrivits i samband med registreringsanordningen enligt det nfimnda svenska patentet 123 638. Potentiometeraxelns resulterande vridning blir ants& lika med skillnaden Indian dess (och avsokarens) bada vridningar. When the time relay T 1 has expired, the contact T 1 closes the circuit 1, 2, 3, 13, - 0 and the contactor K starts the motor M in the accumulating recorder belonging to the pointer 109, whereby the equilibrium state is read in the gross device, ie filled containers, scanned by a scanner not present in the registrar in accordance with what is described in the said patent. The angular deflection of the scanner, shaved from one outer layer of the carriage, which deflection corresponds to the angle of rotation of the pointer in the pointer unit 109 from the zero layer of the scale 110 to the current pointer of the pointer on the scale of gross registration, is transmitted to potentiometer POT. the weight ratio between media I and II in that the contact 11 3A is broken. When the gross registration is performed, the registrar's switch MB I Over frail the gross registration layer 2, 3 to the tare registration layer 2, 4. Thereby the current is broken to the relays R 1, R 2 and T 1, which thus fall. Special electrical contacts with the designation It 1, R. 2, and T 1 are thus broken. The current is connected to the signal lamp SL 3 and the time relay T 2. This is instantaneous for a time, which corresponds to the lowering of the medium level from the upper spruce to the lower spruce, which corresponds to about 2/3 of the maximum level. By lowering the level in the containers slO. NK I and NK II Over to 3, 5 resp. 3, 8. The time fire switch T 2 closes the circuit 1, 2, 4, 13, - 0 after the set time delay, whereby the contactor K returns to and the register motor M starts a tare registration. The angular deflection now obtained on the scale 110 is transmitted by the pointer 109 to the potentiometer POT but with the em direction of rotation relative to the direction of rotation of the gross record. The potentiometer axis is thus rotated at an angle which corresponds to the angle between the current 1Sge rid tare registration and the zero 110 position of the scale. This applies in principle to the salt described in connection with the recording device according to the aforementioned Swedish patent 123 638. The resulting rotation of the potentiometer axis is assumed to be equal to the difference between its two (and the scanner's) two rotations.

Da tararegistreringen är i del narmaste slut-ford, oppnas brytaren MB II momentant och bryter strommen till relaerna R 3, R 3A och T 3. Da_ registreringen slutforts 'slar orrtkopplaren MB I Over till lage 2, 3. Eftersom R 3 liar fallit, slutas nu stromkretsarna Over manaverspolarna MV I .och MV II 'rid koritak- 4— — terna 5, 6 respektive 8, 9, varvid ventilerna 116, 117 oppnas och ny fyllning paborjas. Nar reldet R 3A faller, slutes kretsen mellan po- tentiometern POT och servomotorn, som j us- terar utmatningspumparnas proportionering och som Sr ansluten till klammorna A, B, C. When the tare registration is in the nearest end-ford, the switch MB II is momentarily opened and the current to the relays R 3, R 3A and T 3 is switched off. When the registration is completed, the local switch MB I switches to position 2, 3. Since R 3 has fallen, The circuits MV I .and and MV II 'are now closed. The circuits 4, 6 and 8, 9, respectively, are opened, and the valves 116, 117 are opened and a new filling is drilled. When the current R 3A falls, the circuit between the potentiometer POT and the servomotor is closed, which adjusts the proportion of the output pumps and which Sr is connected to the terminals A, B, C.

Om vagens jarnviktstillstand ej andrats mellan brutto- och tararegistreringarna, kommer potentiometern POT vid tararegistreringen att ha atervant till det ursprungligen installda laget, i vilket den befann sig da visareapparatens visare star ph skalans 110 noll-lage, och nagon andring i proportioneringen sker ej. Om daremot jamsviktstillstandet andrats endera hallet, betyder detta att proportioneringen ej Sr ratt. Potentiometerkontaktens la- ge kommer dâ att andras och att, d. reldet R 3A faller, Throrsaka inkoppling av servomotorn, vilken da okar eller minskar flodet genom en av pumparna. If the weighing condition of the carriage has not changed between the gross and tare registrations, the potentiometer POT at the tare registration will have a return to the originally installed layer, in which it was then the needle star's point star scale 110 zero layer, and no change in proportioning occurs. If, on the other hand, the state of equilibrium has changed either way, this means that the proportioning is not Sr steering wheel. The position of the potentiometer contact will then change and that, when the fire R 3A falls, Throrsaka connection of the servomotor, which then increases or decreases the flow through one of the pumps.

Sammanfattningsvis finnas salunda en visare, en avsiikare fr denna, som i lampliga ogonblick kopplas till och fran potentiometer- axeln medelst en anordning, som i princip Overensstammer med den i det namnda svens- ka patentet beskrivna registreringsanordningen. Potentiometern kopplas elektriskt till motorn efter avsokningen av taravolymen. In summary, there is thus a pointer, a detector for this, which in lightning moments is connected to and from the potentiometer shaft by means of a device which in principle corresponds to the recording device described in the said Swedish patent. The potentiometer is electrically connected to the motor after scanning the tara volume.

Vid bruttoregistreringen vrides avsokaren oak potentiometern en vinkel (a), som mot- svarar vinkeln frail skalans 110 noll-lage till visarens aktuella lage. Sedan andrar sig visarens lage vinkeln + fi (mellan hrutto- och ta- raregistreringarna), oin proportioneringen ej Sr den ratta. Darefter avsokes visarens taralage med avsokaren, rain salunda vrider sig vinkeln (a + p). Denna vridning overfores sedan i negativ riktning till potentiometern, som salunda vrides bakat vinkeln (a + 13), vilket innebar att potentiometerns resulteran- de vridning, raknat fran det lage hos potentiometeraxeln, som svarar mot -visarens noll-lage, blir + fi. Nu kopplas potentiometern till servomotorn, som korrigerar spjallets installning. Darefter fylles behallarna och forloppet upprep as. In the gross registration, the scanner and the potentiometer are rotated an angle (a), which corresponds to the angle from the zero bearing 110 of the scale 110 to the current position of the pointer. Then the pointer's low angle + fi (between the gross and tare registrations) changes, oin the proportioning does not Sr the steering wheel. Then the pointer's taralage is scanned with the scanner, rain salunda turns the angle (a + p). This rotation is then transmitted in a negative direction to the potentiometer, which is thus rotated behind the angle (a + 13), which means that the resulting rotation of the potentiometer, deviated from the bearing of the potentiometer axis, which corresponds to the zero-bearing of the pointer, becomes + fi. The potentiometer is now connected to the servomotor, which corrects the installation of the damper. Then the containers are filled and the process is repeated.

Storleken av potentiometerkontaktens vridningsvinkel blir avgorande for aterforingsnog- grannheten och kan varieras med tidrelaet T 2 pa ett sadant satt, att maximal aterfaringsnoggrannhet erhalles. The magnitude of the angle of rotation of the potentiometer switch becomes decisive for the feedback accuracy and can be varied with the time relay T 2 in such a way that maximum feedback accuracy is obtained.

Den ovan beskrivna och ph ritningarna visade utforingsformen Sr givetvis att betrakta endast sisom icke begransande exempel och kan till sina detaljer modifieras p5 flera satt inom ramen for efterfOljande patentansprak. The embodiment described above and the ph drawings show the embodiment Sr of course to be considered only as non-limiting examples and can be modified in its details in several ways within the scope of the following patent claims.

Salunda kan exempelvis mediumutmatningen fran karlen, vilken enligt ovan tankts ske pa viss tid under avsokningsperioden, regleras genom ytterligare en nivakontroll, vilken ger en impuls da tararegistreringen skall ske. Om flera medier skola blandas, proportioneras fOrst tva av medierna, varefter denna blandning i nasta proportioneringsvag ingar p5 ena sidan och proportioneras mot ett tredje medium, osv. Sasom ovan framhallits kan uppfinningen vidare anvandas *Sven for kornformigt material, varvid mediumutmatningen fran behallarnas underdel kan ske med hjalp av en vibrator, en skruv, ett band eller dylikt och endera utmatningsanordningens hastighet kan regleras ph elektrisk vag. Thus, for example, the medium discharge from the man, which according to the above is thought to take place at a certain time during the scanning period, can be regulated by an additional level check, which gives an impulse when the tare registration is to take place. If several media are to be mixed, two of the media are first proportioned, after which this mixture in the next proportioning weight on one side and proportioned to a third medium, and so on. As mentioned above, the invention can further be used for granular material, whereby the medium discharge from the lower part of the containers can take place with the aid of a vibrator, a screw, a belt or the like and either the speed of the discharge device can be regulated by an electric wave.

Claims

Patent claim:

1. Set in proportion to two media (I, II) with respect to the weight ratio of their inboard, characterized in that the had media are supplied intermittently to their respective proportioning containers (BI, B II), which are supported by a carriage device, that they substantially balance to each other, that the media is discharged substantially continuously from said container on such a salt, to medium level. ' the vessels in the respective containers vary between an upper and a lower spruce value while maintaining a substantially unchanged equilibrium stroke has the carriage device fed up and used to regulate the proportions of the media.

2. According to claim 1, characterized in that the proportions are regulated each time the medium levels are at either of said spruce cairns.

3. According to patent claim 2, characterized in that the proportions are regulated each time the medium levels are below the lower spruce value.

4. Device for carrying out the set according to any one of claims 1-3, characterized by two proportioning containers (BI, B II), which are so arranged on a cradle balance (101) on opposite sides of its pivot axis and at a distance therefrom corresponding to the desired the proportioning, that they essentially balance each other, by means (114, 115) for supplying said media to the respective containers, by means (112, 113) for discharging the media from respective containers, by means (118, 116; 119, 117 ) for such control of the medium supply to the medium discharge from the containers, that the medium levels in these vary Indian an upper oak a lower spruce value, and of a regulator connected to the carriage device (109; Fig. 2), which is arranged to regulate, the medium discharge from the containers (BI , B II) each time the medium level in these has reached one of the said spurs.

Device according to claim 4, characterized in that the regulator (109; Fig. 2) comprises a pointer apparatus (109), which Sr is coupled to one of the arms of the vagal balance (101), - - that its pointer Tor itself depending on the vagal balance The hand-held apparatus has a scanner which is arranged to emit the light of the hand at the had spruce values of the medium level in the containers and which is mechanically interconnectable with and intermittently connected to adjusting means (POT in Fig. 2) which are arranged to adjust the output. of medium frau behdllarna in depending on the difference between the needle hadOsokta ldgen. Request publications: