PL108331B1 - Apparatus for measuring flow speed of liquids and gases - Google Patents

Apparatus for measuring flow speed of liquids and gases Download PDF

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Publication number
PL108331B1
PL108331B1 PL19647377A PL19647377A PL108331B1 PL 108331 B1 PL108331 B1 PL 108331B1 PL 19647377 A PL19647377 A PL 19647377A PL 19647377 A PL19647377 A PL 19647377A PL 108331 B1 PL108331 B1 PL 108331B1
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PL
Poland
Prior art keywords
sensor
liquids
gases
measuring
flow
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Application number
PL19647377A
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Polish (pl)
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PL196473A1 (en
Inventor
Michal Petruszka
Tadeusz Pakula
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Polska Akad Nauk Centrum
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Polska Akad Nauk Centrum filed Critical Polska Akad Nauk Centrum
Priority to PL19647377A priority Critical patent/PL108331B1/en
Publication of PL196473A1 publication Critical patent/PL196473A1/en
Publication of PL108331B1 publication Critical patent/PL108331B1/en

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Description

Przedmiotem wynalazku jest urzadzenie do po¬ miaru predkosci przeplywu cieczy i gazów.Znane sa urzadzenia do pomiaru predkosci prze¬ plywu zawierajace rurke rotametryczna z plywa¬ kiem, którego polozenie zmienia sie w zaleznosci od natezenia przeplywu kontrolowanego srodowis¬ ka. Polozenie plywaka mierzone jest najczesciej metoda indukcyjna lub pojemnosciowa.Znane sa tez urzadzenia zawierajace w rurze pomiarowej specjalnie uksztaltowany wirnik, któ¬ rego mierzona predkosc obrotowa jest funkcja predkosci przeplywu.Przeplywomierze te maja szereg wad jak: dla¬ wienie przeplywu, trudnosc pomiaru malych pred¬ kosci przeplywu, ograniczony zakres pomiarowy.Wad tych nie posiada urzadzenie wedlug wyna¬ lazku. Zawiera ono czujnik w ksztalcie spirali wy¬ konany z tasmy skreconej wzdluz jej wlasnej osi, zamocowany na dwu sprezystych niciach. Przeply¬ wajacy strumien cieczy i gazów wytwarza mo¬ ment obrotowy, który równowazony jest silami sprezystosci zawieszenia czujnika, tak ze przy sta¬ lej predkosci przeplywu pozostaje on w spoczynku.Moment obrotowy czujnika proporcjonalny jest do predkosci przeplywu osrodka i ilosci skoków spi¬ ralnego skrecenia tasmy (czujnika) oraz zalezny od stosunku dlugosci skoku spirali do szerokosci tasmy, z której wykonany jest czujnik, tak wiec wartosc kata o jaki obraca sie czujnik jest miara predkosci przeplywu osrodka. 10 15 20 25 30 Czulosc i zakres pomiarowy urzadzenia zaleza od geometrii czujnika oraz parametrów geometry¬ cznych sprezystych nici mocujacych czujnik.Odczytu kata skrecenia czujnika, który to kat jest funkcja predkosci przeplywu mozna dokonac na drodze elektromagnetycznej, lub tez poprzez tenso- metryczny pomiar deformacji nici mocujacych czujnik. W przypadku pomiaru predkosci cieczy i gazów przezroczystych odczytu mozna dokony¬ wac na drodze optycznego pomiaru kata skrecenia czujnika poprzez wyznaczenie polozenia punktu przeciecia sie tworzacej spirali z linia odniesie¬ nia umieszczona równolegle do osi czujnika.Urzadzenie charakteryzuje sie szeregiem zalet jak: proporcjonalnosc wskazan do predkosci prze¬ plywu, male dlawienie przeplywu, mozliwosc do¬ boru czulosci i zakresu pomiarowego w bardzo szerokich granicach, prosta konstrukcja i brak elementów tracych oraz mozliwosc pracy w róz¬ nych polozeniach.Urzadzenie moze byc stosowane zarówno do po¬ miaru predkosci przeplywu cieczy w duzych zbior¬ nikach, jak tez predkosci przeplywu gazów na te¬ renach otwartych np. predkosci wiatru jak tez do pomiaru predkosci przeplywu cieczy i gazów w kanalach i rurociagach. Dodatkowa zalete urza¬ dzenia stanowi fakt, ze czujnik ustawia sie samo¬ czynnie zgodnie ze strumieniem przeplywu, co umozliwia w przypadku zamocowania go na ob- 108 331108 331 rotowej podstawie okreslanie nie tylko predkosci przeplywu lecz i jego kierunku.Wynalazek jest uwidoczniony w przykladzie wy¬ konania na rysunku, na którym fig. 1 przedstawia widok urzadzenia, a fig. 2 przekrój odmiany urza¬ dzenia przeznaczonego do pomiaru predkosci prze¬ plywu w rurociagach.Urzadzenie zawiera czujnik 1 w ksztalcie spi¬ rali wykonany z tasmy skreconej wzdluz jej wlas¬ nej osi. Czujnik ten zamocowany jest na dwu sprezystych niciach 2 i 3 przytwierdzony do cien¬ kich wsporników 4 i 5. Odmiana urzadzenia do pomiaru predkosci przeplywu w rurociagach skla¬ da sie z rury pomiarowej 6, w której osiowo umie¬ szczony jest czujnik 1 zamocowany na dwu spre- 15 zystych niciach 2 i 3 przytwierdzonych do dwa cienkich poprzecznych przegród 7 i 8 umieszczo¬ nych na poczatku i na koncu rury pomiarowej.Zastrzezenia patentowe 1. Urzadzenie do'pomiaru predkosci przeplywu cieczy i gazów, znamienne tym, ze zawiera wyko¬ nujacy obrót pod wplywem przeplywajacego me¬ dium czujnik (1) zawieszony na dwu sprezystych niciach (2) i (3), przy czym wartosc kata obrotu czujnika jest miara predkosci przeplywu medium. 2. Urzadzenie wedlug zastrz. 1, znamienne tym,. ze czujnik (1) tworzy tasma skrecona wzdluz jej wlasnei osi w ksztalt spirali.Fig. 1 Fig.2 Bltk 1337/80 r. 95 egz. A4 Cena 45 zl PLThe subject of the invention is a device for measuring the flow velocity of liquids and gases. There are known devices for measuring the flow velocity which include a rotametric tube with a float, the position of which changes depending on the flow rate of a controlled environment. The position of the float is usually measured by the inductive or capacitive method. There are also devices containing a specially shaped rotor in the measuring tube, the measured rotational speed of which is a function of the flow velocity. These flow meters have a number of disadvantages such as: bones of flow, limited measuring range. These disadvantages do not exist in the device according to the invention. It comprises a spiral-shaped sensor made of a ribbon twisted along its axis, mounted on two elastic threads. The flowing stream of liquids and gases creates a torque which is balanced by the spring force of the sensor suspension, so that at a constant flow rate it remains at rest. The torque of the sensor is proportional to the flow rate of the medium and the number of spikes of spiral twist. tape (sensor) and depends on the ratio of the length of the spiral stroke to the width of the tape from which the sensor is made, so the value of the angle by which the sensor rotates is a measure of the medium flow velocity. 10 15 20 25 30 The sensitivity and measuring range of the device depend on the geometry of the sensor and the geometric parameters of the resilient threads holding the sensor. The angle of rotation of the sensor, which is a function of flow velocity, can be read by electromagnetic means, or by strain measurement of deformation. sensor mounting threads. In the case of measuring the velocity of liquids and transparent gases, the reading can be made by optically measuring the twist angle of the sensor by determining the location of the point of intersection of the spiral forming the spiral with the reference line placed parallel to the sensor axis. The device has a number of advantages, such as: flow rate, low flow throttling, the possibility of selecting the sensitivity and measuring range within very wide limits, simple design and no losing elements, and the possibility of working in various positions. The device can be used both for measuring the flow velocity of liquids in large tanks, as well as gas flow velocity in open areas, e.g. wind velocity, as well as for measuring the velocity of liquid and gas flow in channels and pipelines. An additional advantage of the device is the fact that the sensor aligns itself with the flow rate, which makes it possible, when it is mounted on a rotating base, to determine not only the flow rate but also its direction. Figure 1 shows a view of the device, and Figure 2 shows a cross-section of a variant of the device designed to measure the flow velocity in pipelines. The device comprises a spiral-shaped sensor 1 made of a ribbon twisted along its own length. on the axis. This sensor is mounted on two elastic threads 2 and 3 attached to thin supports 4 and 5. A version of the device for measuring the flow velocity in pipelines consists of a measuring tube 6 in which the sensor 1 is mounted axially on two with elastic threads 2 and 3 attached to two thin transverse baffles 7 and 8 placed at the beginning and at the end of the measuring tube. Patent claims 1. Device for measuring the velocity of the flow of liquids and gases, characterized by the fact that it contains rotation under the influence of a flowing medium, the sensor (1) is suspended on two elastic threads (2) and (3), the value of the rotation angle of the sensor being a measure of the speed of the medium flow. 2. Device according to claim According to any of the preceding claims. that the sensor (1) forms a ribbon twisted along its own axis into a spiral. 1 Fig. 2 BLTK 1337/80 r. 95 copies A4 Price PLN 45 PL

Claims (2)

Zastrzezenia patentowe 1. Urzadzenie do'pomiaru predkosci przeplywu cieczy i gazów, znamienne tym, ze zawiera wyko¬ nujacy obrót pod wplywem przeplywajacego me¬ dium czujnik (1) zawieszony na dwu sprezystych niciach (2) i (3), przy czym wartosc kata obrotu czujnika jest miara predkosci przeplywu medium.Claims 1. A device for measuring the velocity of the flow of liquids and gases, characterized in that it comprises a sensor (1) that performs rotation under the influence of a flowing medium suspended on two elastic threads (2) and (3), the value of which is sensor rotation is a measure of the flow rate of the medium. 2. Urzadzenie wedlug zastrz. 1, znamienne tym,. ze czujnik (1) tworzy tasma skrecona wzdluz jej wlasnei osi w ksztalt spirali. Fig. 1 Fig.2 Bltk 1337/80 r. 95 egz. A4 Cena 45 zl PL2. Device according to claim According to any of the preceding claims. that the sensor (1) forms a ribbon twisted along its own axis into a spiral. Fig. 1 Fig. 2 Bltk 1337/80 r. 95 copies A4 Price PLN 45 PL
PL19647377A 1977-03-07 1977-03-07 Apparatus for measuring flow speed of liquids and gases PL108331B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19647377A PL108331B1 (en) 1977-03-07 1977-03-07 Apparatus for measuring flow speed of liquids and gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL19647377A PL108331B1 (en) 1977-03-07 1977-03-07 Apparatus for measuring flow speed of liquids and gases

Publications (2)

Publication Number Publication Date
PL196473A1 PL196473A1 (en) 1978-09-11
PL108331B1 true PL108331B1 (en) 1980-04-30

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PL196473A1 (en) 1978-09-11

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Effective date: 20040212