Masurarea si reglarea automata a presiunii

8/19/2019 Masurarea si reglarea automata a presiunii

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MĂSURAREA ŞIREGLAREA AUTOMATĂ A

PRESIUNII

Studentă: Bălan Gabriela

Facultatea: Ştiina !i In"ineria Materialel#r

Gru$a: %&'( A



AUTOMATI) A*+USTMENT OF PRESSURE

The pressure is a significant amount of state that characterize the fluidicsystems, gaseous or liquid. The most frequently encountered is the automatic

adjustment of gas pressure for a consumer or a supply network: industrialcompressed air, instrument air (1.4 ar!, o"ygen, #$%, nitrogen, methane,liquefied petroleum gas etc. . &or this purpose, use regulatoarede mechanical

pressure, the control characteristic ', with one or two amplification steps.

n the second emodiment, the automatic regulation of the pressure is spread ina plant for producing compressed air to flow from one to thousands of m) * h.

Mec,anical $re--ure re"ulat#r $r#$#rti#nal

The figure is a schematic diagram of a mechanical pressureregulator, diaphragm use on compressed air, gas, o"ygen etc.

1. #ylindrical ody

%. The fle"ile memrane

). #o+er

4. igid

-. #oil spring

. /earing



0. djusting screw

2. ods

3. e+erage

15. egulating +al+e

MEASUREMENT PRESSURE

'ressure is a physical quantity equal to the ratio of the magnitude of force&, the normal press e+enly on a surface, and the surface area 6.

p 7 & * 6.

Mean- .#r /ea-urin" t,e $re--ure:

1. After measuring the pressure are different:

8 arometer, which measures air pressure9

8 gauges and micromanometre, which measures pressure higher thanatmospheric pressure9

8 micro +acuum gauge and +acuum gauge that measures pressure lowerthan atmospheric pressure9

8 mano+acuummetre, which measures how oth high pressure and pressure lower than atmospheric pressure9

2. After landing, pressure measuring devices can be:

8 masurat standard de+ices that ser+e to reproduce and preser+emeasurement units or de+ices used to check work9

8 measuring de+ices work, ser+ing on current measurements.

3. After working principle there:

8 de+ices with liquid, the measured pressure is alanced y the pressure of a liquid column9

8 apparatus elastic element, the pressure is measured y the deflection of aresilient memer9



8 appliances, the pressure +ariations are con+erted into measurale+ariations of electrical quantities.

PRESSURE REGULATORS

0i", $re--ure re"ulat#r RPI t1$e

;igh pressure regulator ' type is used in measuring and regulating stations(6<! or other gas installations ser+ing to adjust the gas pressure in the pipeand keep it constant at the outlet of the regulator control group limits the inlet

pressure +ariation and flow.

Pre--ure re"ulat#r 2it, indirect dri3e t1$e RPA'

The controller is used to reduce gas pipelines and regulation ensuringmaintaining constant output pressure in the control group limits the +ariation ofinlet pressure and flow.

Aut#/atic $re--ure re"ulat#r 2it, indirect dri3e t1$e RPA 4

The controller is used to reduce and regulate gas pressure in the pipes, ensuringmaintaining constant output pressure in control group limits the +ariation of inlet

pressure and flow.

Pre--ure re"ulat#r RPG '5& E t1$e

egulator '= )-5 > is a direct dri+e controller designed to reduce and regulategas pressure in plants use, ensuring a constant outlet pressure to inlet pressure

+ariation or +ariation of flow.



MĂSURAREA PRESIUNII

'resiunea este o marime fizica egala cu raportul dintre marime fortei &,care apasa normal si uniform pe o suprafata, si aria 6 acestei suprafete.

p 7 &*6.

Mi6l#ace $entru /ă-urarea $re-iunii

1. dupa valoarea presiunii de măsurat, se deosebesc:

F arometre, care m?soar? presiunea atmosferic?9

F manometre Gi micromanometre, care masoar? presiuni mai mari dec@t presiunea atmosferic?9

F +acuummetre Gi micro+acuummetre, care masoar? presiuni mai micidec@t presiunea atmosferic?9

F mano+acuummetre, care masoar? at@t presiuni mari c@t Gi presiunimai mici dec@t presiunea atmosferic?9

2. dupa destinaţie, aparatele de măsurat presiuni pot fi :

F aparatele de masurat etalon, care ser+esc la reproducerea Gi p?strareaunit?Ailor de masur? sau care ser+esc la +erificarea aparatelor de lucru9

F aparate de m?surat de lucru, care ser+esc la m?sur?ri curente.

3. dupa principiul de funcţionare, eistă :

F aparate cu lichid, la care presiunea m?surat? este echilirat? de

presiunea unei coloane de lichid9

F aparate cu element elastic, la care presiunea este m?surat? prindeformarea unui element elastic9

F aparate electrice, la care +ariaAiile de presiune sunt transformate @n

+ariaAii ale unor m?rimi electrice m?suraile.

REGULATOARE *E PRESIUNE



Re"ulat#r de $re-iune 7naltă ti$ RPI

egulatorul de presiune inalta tip ' se utilizeaza in statiile de reglare masurare(6<! sau in alte instalatii de gaze a+Cnd rolul de a regla presiunea gazelor din

conducta si de a o mentine constanta la iesirea din regulator in limitele grupei dereglare la +ariatia presiunii de intrare si a deitului.

Re"ulat#r de $re-iune cu acti#nare indirecta ti$ RPA'

egulatorul se utilizeaza pentru reducerea si reglarea presiunii gazelor dinconducte asigurCnd mentinerea constanta a presiunii de iesire, in limitele grupeide reglare la +ariatia presiunii de intrare si a deitului.

Re"ulat#r de $re-iune aut#/at cu acti#nare indirecta ti$RPA 4

egulatorul se utilizeaza pentru reducerea si reglarea presiunii gazelor dinconducte, asigurCnd mentinerea constanta a presiunii de iesire in limitele grupeide reglare la +ariatia presiunii de intrare si a deitului.

Re"ulat#r de $re-iune ti$ RPG '5& E

egulatorul '= )-5 > este un regulator cu actionare directa, destinat reduceriisi reglarii presiunii gazelor in instalatiile de utilizare, asigurCnd o presiune deiesire constanta la +ariatia presiunii de intrare sau la +ariatia deitului.

Masurarea si reglarea automata a presiunii

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