PL107258B1 - THERMOMETRIC MANUAL METER - Google Patents

THERMOMETRIC MANUAL METER Download PDF

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Publication number
PL107258B1
PL107258B1 PL20298777A PL20298777A PL107258B1 PL 107258 B1 PL107258 B1 PL 107258B1 PL 20298777 A PL20298777 A PL 20298777A PL 20298777 A PL20298777 A PL 20298777A PL 107258 B1 PL107258 B1 PL 107258B1
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PL
Poland
Prior art keywords
diaphragm
attached
thermometric
manometer
strain gauges
Prior art date
Application number
PL20298777A
Other languages
Polish (pl)
Other versions
PL202987A1 (en
Inventor
Andrzej Smetkiewicz
Anna Kolujczyk
Janusz Krajewski
Jerzy Prywer
Original Assignee
Politechnika Lodzka
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 Politechnika Lodzka filed Critical Politechnika Lodzka
Priority to PL20298777A priority Critical patent/PL107258B1/en
Publication of PL202987A1 publication Critical patent/PL202987A1/en
Publication of PL107258B1 publication Critical patent/PL107258B1/en

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Description

Przedmiotem wynalazku jest tensometryczny manometr róznicowy do pomiaru cisnien.Znany z polskiego opisu patentowego nr 46440 tensometryczny manometr róznicowy jest wyposazony w membrane polaczona z obudowa w sposób zapewniajacy spietrzenie naprezen. W miejscu spietrzenia naprezen naklejone sa tensometry do pomiaru róznicy cisnien. Znany manometr charakteryzuje sie nierównomiernoscia obciazenia powierzchni wynikajaca z podciecia membrany w celu uzyskania spietrzenia naprezen. W efekcie zawezony zostaje zakres pomiaru i dokladnosc wskazan spowodowane nieprostopadlym ustawianiem sie mem¬ brany w stosunku do osi symetrii manometru.Znany jest takze z polskiego opisu patentowego nr 49318 elektromechaniczny manometr róznicowy zalo¬ zony z dwóch komór przedzielonych membrana, której ruch przenoszony jest za pomoca przeciwnie dzialajacych sprezyn i przewodu na ruch rdzenia magnetycznego.Tensometryczny manometr róznicowy wedlug wynalazku, w którego korpusie sa dwie komory oddzielone szczelnie od siebie sztywna membrana niesprezyscie polaczona £ korpusem, posiada przymocowane do mem¬ brany ciegno z naklejonymi tensometrami prostopadle do jej powierzchni. Konce ciegna sa polaczone z dnem korpusu manometru, przy czym jeden z jego konców jest zlaczony z dnem korpusu za posrednictwem wkretu regulacyjnego. Nadto membrana jest tak uksztaltowana, ze jej srodkowa czesc jest sztywna, natomiast zewne¬ trzna — niesprezysta.W celu zmniejszenia wplywu temperatury na charakterystyke menometru wedlug wynalazku umieszcza sie dodatkowe tensometry na korpusie manometru, po obu stronach membrany, albo na nienaprezonych blaszkach umieszczonych w poblizu ciegna.W manometrze wedlug wynalazku ciegno poddawane jest wstepnemu naciagowi, na przyKlad za pomoca sprezyny, które zezwala na ustawienie membrany w polozeniu zerowym oraz uzyskanie proporcjonalnosci wska¬ zan zarówno przy bardzo malych, jak i przy duzych rózniacach cisnien, zapewniajac dokladnosc pomiaru.Manometr wedlug wynalazku jest bardzo prosty w wykonaniu.Przedmiot wynalazku jest uwidoczniony w przykladzie wykonania na rysunku w przekroju wzdluznym.2 ' * n7258 Korpus manometru 1 przedzielony jest membrana 2 na dwie komory 3 i 4. Komory 3 i 4 wyposazone sa w krócce 5 i 6,'do zlaczenia manometru ze zródlami plynu, których róznica cisnien podlega pomiarowi. Do membrany 2 jest przymocowane ciegno 7 z naklejonymi nan tensometrami 8 i 9. Jeden z konców ciegna 7 jest polaczony z dnem korpusu 1 w ten sposób, ze przymocowany jest don koniec sprezyny srubowej 10, której drugi koniec jest zlaczony z wkretem 11 wkreconym w dno korpusu 1. Srodkowa czesc membrany 2 Jest sztywna, podczas gdy zewnetrzna jej czesc 12 jest niesprezysta. Takie uksztaltowanie membrany zapewnia, ze sily dzialajace na membrane sa przenoszone na korpusjedynie poprzez ciegno 7.Pod wplywem przylozonej róznicy cisnien sily dzialajace na membrane sa przenoszone poprzez ciegno 7.Naprezenia ciegna 7 sa mierzone w znany sposób za pomoca naklejonych na nich tensometrów 8 i 9 polaczonych z mostkiem tensometrycznym nie uwidocznionym na rysunku.Zastrzezenie patentowe Tensometryczny manometr róznicowy, w którego korpusie sa dwie komory oddzielone szczelnie od siebie membrana, znamienny t y m,ze do membrany (2)jest przymocowane ciegno (7) z naklejonymi nan tenso¬ metrami (8) i (9), przy czym srodkowa czesc membrany (2) jest sztywna, podczas gdy jej czesc zewnetrzna jest niesprezysta.Prac. Poligraf. UP PRL naklad 120+18 Cena 45 zl. PLThe subject of the invention is a strain gauge differential manometer for pressure measurement. Known from the Polish patent specification No. 46,440, the strain gauge differential manometer is equipped with a diaphragm connected to the housing in a way that ensures the accumulation of stresses. In the place where the stresses accumulate, there are strain gauges to measure the pressure difference. The known pressure gauge is characterized by an uneven surface load resulting from the undercutting of the diaphragm in order to obtain a pressure gradient. As a result, the measurement range and the accuracy of the indications are narrowed down due to the non-perpendicular positioning of the diaphragm in relation to the symmetry axis of the manometer. There is also known from the Polish patent description No. 49318 an electromechanical differential manometer consisting of two chambers separated by a diaphragm, the movement of which is transmitted by The pressure differential pressure gauge according to the invention, in the body of which are two chambers sealed from each other, tightly connected by the body, has a cable attached to the membrane with attached strain gauges perpendicular to its surface. The ends of the tie rod are connected to the bottom of the gauge body, with one end connected to the bottom of the body by an adjusting screw. Moreover, the diaphragm is shaped in such a way that its central part is rigid, and the outer part is non-elastic. In order to reduce the influence of temperature on the menometer characteristics, according to the invention, additional strain gauges are placed on the manometer body, on both sides of the diaphragm, or on non-stressed plates placed near the area. In the manometer according to the invention, the cable is subjected to a preliminary tension, for example by means of a spring, which allows the diaphragm to be set to the zero position and to obtain the proportionality of the indications at both very small and large pressure differentials, ensuring the accuracy of the measurement. The invention is very simple to implement. The subject of the invention is shown in the example of the embodiment in the cross-sectional drawing. 2 '* n7258 The body of the manometer 1 is divided by the diaphragm 2 into two chambers 3 and 4. The chambers 3 and 4 are equipped with stubs 5 and 6, 'to connect the pressure gauge with fluid sources, the differential pressure of which is subject to p measurement. A rod 7 is attached to the membrane 2, with the nano strain gauges 8 and 9 attached. One of the ends of the rod 7 is connected to the bottom of the body 1 in such a way that the end of the coil spring 10 is attached to the end, the other end of which is connected to a screw 11 screwed into the bottom body 1. The middle part of the diaphragm 2 is rigid, while the outside part 12 is non-elastic. Such a design of the diaphragm ensures that the forces acting on the diaphragm are transferred to the body only via the cable 7. Under the influence of the applied differential pressure, the forces acting on the diaphragm are transmitted through the cable 7. The stresses of the cable 7 are measured in a known manner by means of strain gauges 8 and 9 attached to them. with a strain gauge bridge, not shown in the figure. Patent claim A strain gauge differential manometer, in the body of which there are two chambers, tightly separated from each other by a diaphragm, characterized by the fact that a rod (7) with nano strain gauges (8) is attached to the diaphragm (2). ) and (9), with the central part of the diaphragm (2) being rigid while the external part is non-elastic. Typographer. UP PRL, circulation 120 + 18 Price PLN 45. PL

Claims (1)

1. Zastrzezenie patentowe Tensometryczny manometr róznicowy, w którego korpusie sa dwie komory oddzielone szczelnie od siebie membrana, znamienny t y m,ze do membrany (2)jest przymocowane ciegno (7) z naklejonymi nan tenso¬ metrami (8) i (9), przy czym srodkowa czesc membrany (2) jest sztywna, podczas gdy jej czesc zewnetrzna jest niesprezysta. Prac. Poligraf. UP PRL naklad 120+18 Cena 45 zl. PLClaim 1. A strain gauge differential pressure gauge, the body of which is composed of two chambers sealed from each other by a diaphragm, characterized in that a rod (7) is attached to the diaphragm (2) with nano strain gauges (8) and (9) attached to it, making the central part of the diaphragm (2) rigid, while the external part is non-elastic. Wash. Typographer. UP PRL, circulation 120 + 18 Price PLN 45. PL
PL20298777A 1977-12-15 1977-12-15 THERMOMETRIC MANUAL METER PL107258B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL20298777A PL107258B1 (en) 1977-12-15 1977-12-15 THERMOMETRIC MANUAL METER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL20298777A PL107258B1 (en) 1977-12-15 1977-12-15 THERMOMETRIC MANUAL METER

Publications (2)

Publication Number Publication Date
PL202987A1 PL202987A1 (en) 1978-11-20
PL107258B1 true PL107258B1 (en) 1980-02-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
PL20298777A PL107258B1 (en) 1977-12-15 1977-12-15 THERMOMETRIC MANUAL METER

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PL (1) PL107258B1 (en)

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PL202987A1 (en) 1978-11-20

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