PL132604B1 - Apparatus for measurement of density of liquids - Google Patents

Apparatus for measurement of density of liquids Download PDF

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Publication number
PL132604B1
PL132604B1 PL22316880A PL22316880A PL132604B1 PL 132604 B1 PL132604 B1 PL 132604B1 PL 22316880 A PL22316880 A PL 22316880A PL 22316880 A PL22316880 A PL 22316880A PL 132604 B1 PL132604 B1 PL 132604B1
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PL
Poland
Prior art keywords
liquid
probe
hydrostatic
density
measuring
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Application number
PL22316880A
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Polish (pl)
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PL223168A1 (en
Inventor
Jozef Zablocki
Henryk Jasiak
Original Assignee
Zakl Azotowe Im F Dzierzynsk
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Application filed by Zakl Azotowe Im F Dzierzynsk filed Critical Zakl Azotowe Im F Dzierzynsk
Priority to PL22316880A priority Critical patent/PL132604B1/en
Publication of PL223168A1 publication Critical patent/PL223168A1/xx
Publication of PL132604B1 publication Critical patent/PL132604B1/en

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Description

Przedmiotem wynalazku jest urzadzenie do pomiaru gestosci cieczy, metoda mierzenia cisnienia hydrostatycznego tej cieczy w zbiorniku.Urzadzenia sluzace do tego celu skladaja sie z czlonu mierzacego cisnienie hydro¬ statyczne, przetworników cisnienia oraz wskaznika wielkosci mierzonej, to jest gestosci cieczy* Zasadniczym elementem czlonu mierzacego cisnienie hydrostatyczne jest sonda hydro¬ statyczna stanowiaca zanurzona w cieczy rurke, do której od góry doprowadza sie stala ilosc gazu* Pomiar opiera sie na zaleznosci: p * h • V^ , w której p - cisnienie hydrosta¬ tyczne cieczy, h - wysokosc slupa cieczy nad dolnym koncem sondy /wylotem gazu/, ^- gestosc cieczy.W znanych urzadzeniach czlon mierzacy stanowia dwie sondy, jedna zanurzona glebiej w zbiorniku, druga plyciej, obie na stale przytwierdzone do zbiornika tak, ze ich dolne konce / wyloty gazu/ maja stala odleglosc od dna zbiornika* Rezultatem takiego przymoco¬ wania sond jest ich zmienne zanurzenie w cieczy, której poziom w zbiorniku moze byc rózny w czasie* Kazda z tych sond, rozpatrywana pojedynczo, mierzy cisnienie slupa cieczy róznej wysokosci w czasie, zaleznej od poziomu cieczy w zbiorniku. Z tego wzgledu nie moze byc wykorzystany do pomiaru gestosci cieczy pomiar cisnienia hydrostatycznego z jednej takiej sondy. Stalym w czasie cisnieniem hydrostatycznym jest cisnienie slupa cieczy wysokosci równej róznicy zanurzenia dwóch takich sond* Dopiero w stosunku do róznicy cisnien z dwóch takich sond mozna powiedziec, ze jest ona proporcjonalna do gestosci cieczy i pominac wielkosc h we wspomnianej zaleznosci* Niedogodnoscia w stosowaniu urzadzenia z tak rozwia¬ zanym czlonem mierzacym jest koniecznosc niedopuszczenia do spadku poziomu cieczy w zbior¬ niku ponizej zakonczenia plyciej zanurzonej sondy* W sklad tego urzadzenia musi ponadto wchodzic, oprócz dwóch przetworników cisnienia, takze element liczacy /odejmujacy/*2 132 604 Urzadzenie wedlug wynalazku, skladajace sie z czlonu mierzacego cisnienie hydrosta¬ tyczne cieczy, przetwornika cisnienia i wskaznika gestosci, w którym zasadniczym elementem czlonu mierzacego jest sonda hydrostatyczna stanowiaca zanurzona w cieczy rurke z doprowa¬ dzeniem stalej ilosci gazu, ma jako czlon mierzacy sonde hydrostatyczna zaopatrzona w plywak, Dzieki temu sonda zanurzona jestycieczy na stala glebokosc. Ksztalt i ciezar plywaka, a wiec i calej sondy plywakowej dobiera sie droga prostych obliczen tak, by w szerokim ruchowym zakresie zmian ciezaru wlasciwego cieczy glebokosc zanurzenia sondy nie zmieniala sie w sposób znaczacy dla dokladnosci pomiaru. Osiaga sie to przez zastosowanie lekkiego plywaka o duzych wymiarach* Ze wzgledu na stala wysokosc slupa cieczy nad dolnym koncem sondy /wylotem gazu/, pomiar cisnienia z tej sondy moze byc bezposrednio wykorzystany do pomiaru gestosci cieczy. Do sondy prowadzi przewód elastyczny doprowadzajaoy do niej stala ilosc powietrza lub innego gazu obojetnego. Sygnal cisnieniowy doprowadzony jest sprzed sondy do przetwornika cisnienia lub bezposrednio do wskaznika gestosci cieczy. Sygnal ten moze byc równiez wykorzystany do dalszego przetwarzania w ukladach regulacji, sygnalizacji i blokady.Zaleta urzadzenia wedlug wynalazku jest prostota i mozliwosc dokonywania pomiaru przy róznyoh poziomach cieczy w zbiorniku /powyzej minimum wyznaczonego dlugoscia sondy/.Zbedne jest takze stosowanie elementu liczacego.Przedmiot wynalazku pokazany jest w przykladzie wykonania sohematyoznie na rysunku.Poprzez filtr 1, regulator malego przeplywu 2 przesylana jest stabilna ilosc powietrza do sondy zaopatrzonej w plywak 3« Sonda plywakowa czyli zespól zlozony z rurki z doprowadze¬ niem powietrza zanurzonej w cieczy i plywaka 3 unoszacego sie swobodnie na powierzchni cieczy ma stala glebokosc zanurzenia. Stabilne ilosc gazu doprowadzana jest do sondy ply¬ wakowej za pomoca przewodu elastycznego w formie spirali 4. Sygnal cisnieniowy sprzed sondy odprowadzany jest do przetwornika cisnienie 5 lub od razu do wskaznika pokazujacego aktualna gestosc cieczy w zbiorniku.Zastrzezenie patentowe Urzadzenie do pomiaru gestosci oieczy, skladajace sie z czlonu mierzacego olsnienie hydrostatyczne cieczy w zbiorniku, przetwornika cisnienia 1 wskaznika gestosci, w którym zasadniczyn elementem ozlonu mierzacego jest sonda hydrostatyczna stanowiaca zanurzona w cieczy rurke z doprowadzeniem stalej ilosci gazu^ znamienne tym, ze sonda hydrostatyczna jest zamocowana do plywaka /3/. 3 ^ 1 — N § -i M i. i —j 1^3 A i Pracownia Poligraficzna UP PRL. Naklad 100 cgz.Cena 100 zl PLThe subject of the invention is a device for measuring the density of a liquid, a method of measuring the hydrostatic pressure of this liquid in a tank. Devices used for this purpose consist of a component measuring the hydrostatic pressure, pressure transducers and an indicator of the measured value, i.e. the density of the liquid * The essential element of the component measuring pressure hydrostatic is a hydrostatic probe which is a tube immersed in the liquid, to which a constant amount of gas is fed from the top. The measurement is based on the relationship: p * h • V ^, in which p - hydrostatic pressure of the liquid, h - height of the liquid column above the lower end of the probe / gas outlet /, ^ - liquid density. In known devices, the measuring member consists of two probes, one immersed deeper in the tank, the other shallow, both permanently attached to the tank so that their lower ends / gas outlets / have a constant distance from the bottom of the tank * The result of this attachment of the probes is their variable immersion in the liquid, the level of which in the tank time may vary * Each of these probes, taken individually, measures the pressure of a column of liquid at a different height over time, depending on the liquid level in the tank. For this reason, the hydrostatic pressure measurement from one such probe cannot be used to measure the density of liquids. A constant hydrostatic pressure in time is the pressure of a column of liquid equal to the difference in the immersion of two such probes * Only in relation to the difference in pressure from two such probes can it be said that it is proportional to the density of the liquid and the value h in the aforementioned relation * The measuring element so solved is the necessity to prevent the liquid level in the tank from dropping below the end of the shallowly immersed probe * The device must also include, apart from two pressure transducers, also a counting / subtracting element * 2 132 604 Device according to the invention, consisting of a unit measuring the hydrostatic pressure of a liquid, a pressure transducer and a density indicator, in which the main element of the measuring element is a hydrostatic probe which is a tube immersed in a liquid with a constant amount of gas supplied, has a hydrostatic probe equipped with a float as the measuring element. ago the probe z the aneurized liquid is at a constant depth. The shape and weight of the float, and thus the entire float probe, is selected by simple calculations so that in the wide range of movement of changes in the specific weight of the liquid, the depth of probe immersion does not change significantly for the accuracy of the measurement. This is achieved by the use of a lightweight float with large dimensions * Due to the constant height of the liquid column above the bottom end of the probe / gas outlet /, the pressure measurement from this probe can be directly used to measure the density of the liquid. A hose is fed to the probe with a constant volume of air or other inert gas fed there. The pressure signal is led upstream of the probe to the pressure converter or directly to the liquid density indicator. This signal can also be used for further processing in control, signaling and blocking systems. The advantage of the device according to the invention is its simplicity and the possibility of measuring at different levels of liquid in the tank / above the minimum length of the probe /. It is also necessary to use a counting element. It is shown in the example of the execution, as shown in the figure. Via filter 1, low flow regulator 2, a stable amount of air is sent to the probe equipped with a float 3 «Float probe, i.e. a set consisting of a tube with an air supply immersed in the liquid and a float 3 floating freely has a constant immersion depth on the liquid surface. A stable amount of gas is supplied to the float probe via a spiral-shaped hose 4. The pressure signal from before the probe is sent to the pressure converter 5 or directly to the indicator showing the current density of the liquid in the tank. consists of a member measuring hydrostatic glare of the liquid in the tank, a pressure transducer and a density indicator, in which the main element of the measuring ozone is a hydrostatic probe which is a tube immersed in the liquid with a constant amount of gas supplied ^ characterized in that the hydrostatic probe is attached to a float / 3 /. 3 ^ 1 - N § -i M i. I —j 1 ^ 3 A i Printing Studio of the Polish People's Republic. Mintage 100 cgz Price PLN 100 PL

Claims (1)

1. Zastrzezenie patentowe Urzadzenie do pomiaru gestosci oieczy, skladajace sie z czlonu mierzacego olsnienie hydrostatyczne cieczy w zbiorniku, przetwornika cisnienia 1 wskaznika gestosci, w którym zasadniczyn elementem ozlonu mierzacego jest sonda hydrostatyczna stanowiaca zanurzona w cieczy rurke z doprowadzeniem stalej ilosci gazu^ znamienne tym, ze sonda hydrostatyczna jest zamocowana do plywaka /3/. 3 ^ 1 — N § -i M i. i —j 1^3 A i Pracownia Poligraficzna UP PRL. Naklad 100 cgz. Cena 100 zl PL1. Patent claim A device for measuring fluid density, consisting of a component measuring the hydrostatic glare of the liquid in the tank, a pressure transducer and a density indicator, in which the essential element of the measuring ozone is a hydrostatic probe, which is a tube immersed in the liquid with a constant amount of gas supplying, characterized by: that the hydrostatic probe is attached to the float / 3 /. 3 ^ 1 - N § -i M i. I —j 1 ^ 3 A i Printing Studio of the Polish People's Republic. Mintage 100 cg. Price PLN 100 PL
PL22316880A 1980-03-31 1980-03-31 Apparatus for measurement of density of liquids PL132604B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL22316880A PL132604B1 (en) 1980-03-31 1980-03-31 Apparatus for measurement of density of liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL22316880A PL132604B1 (en) 1980-03-31 1980-03-31 Apparatus for measurement of density of liquids

Publications (2)

Publication Number Publication Date
PL223168A1 PL223168A1 (en) 1981-10-02
PL132604B1 true PL132604B1 (en) 1985-03-30

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PL223168A1 (en) 1981-10-02

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