Kana iwe ukafamba-famba uchitenderedza chekishopu yechirimwa, iwe zvechokwadi uchaona mamwe mapaipi ane denderedzwa-musoro mavharuvhu, ari kudzora mavharuvhu.
Pneumatic diaphragm inodzora vharafu
Iwe unogona kuziva rumwe ruzivo nezve vharuvhu inodzora kubva pazita rayo.Izwi rakakosha rekuti "mutemo" nderekuti gadziriso yaro inogona kugadziriswa zvisina tsarukano pakati pe0 ne100%.
Shamwari dzinongwarira dzinofanira kuona kuti pane mudziyo wakarembera pasi pemusoro wevharuvhu yega yega inoronga.Vaya vanozviziva vanofanira kuziva kuti uyu ndiwo mwoyo wevharuvhu inoronga, inomira vharafu.Kuburikidza nechigadzirwa ichi, vhoriyamu yemhepo inopinda mumusoro (pneumatic film) inogona kugadziriswa.Nyatsodzora nzvimbo yevharuvhu.
Valve positioners vanosanganisira vane hungwaru vanoisa zvinzvimbo uye ma mechanical positioners.Nhasi tiri kukurukura iyo yekupedzisira mechanic positioner, iyo yakafanana neyenzvimbo inoratidzwa mumufananidzo.
Kushanda musimboti wemakanika pneumatic valve positioner
Valve positioner structure diagram
Mufananidzo wacho unotsanangura zvakanyanya zvikamu zvemakanika pneumatic valve positioner chimwe nechimwe.Nhanho inotevera ndeyekuona kuti inoshanda sei?
Mhepo inobva kumhepo yakamanikidzwa yemhepo compressor station.Pane air filter pressure yekudzikisa vharafu pamberi pemhepo sosi inopinza yevharuvhu yekunatsa mweya wakadzvanywa.Mhepo inobva pakubuda kwevharuvhu inoderedza dhiziro inopinda ichibva pachigadziko chevharuvhu.Kuwanda kwemhepo inopinda mumusoro we membrane yevhavha inotarirwa maererano nechiratidzo chekubuda chemutongi.
Mhepo yemagetsi inobuda nemutongi ndeye 4 ~ 20mA, uye chiratidzo chepneumatic i20Kpa ~ 100Kpa.Iko kutendeuka kubva kumagetsi kuchiratidzo chepneumatic kunoitwa kuburikidza nemagetsi ekushandura.
Kana chiratidzo chemagetsi chinobuda nemutongi chinoshandurwa kuita chinoenderana gasi chiratidzo, inoshandurwa gasi chiratidzo chinobva chaitwa pamabhero.Lever 2 inofamba ichitenderedza fulcrum, uye chikamu chezasi chelever 2 chinoenda kurudyi uye chinosvika pamuromo.Iyo yekumashure yekumanikidza yemhino inowedzera, uye mushure mekukwidziridzwa nepneumatic amplifier (iyo chikamu chine isingasviki chiratidzo mumufananidzo), chikamu chemhepo sosi inotumirwa kukamuri yemhepo yepneumatic diaphragm.Irovhavha hunde inotakura vharuvhu ichidzika pasi uye otomatiki inovhura vharuvhu zvishoma nezvishoma.kuwana diki.Panguva ino, tsvimbo yemhinduro (tsvimbo yekuzunungusa iri pamufananidzo) yakabatana netsinde yevharuvhu inofamba ichidzika pasi ichitenderedza fulcrum, zvichiita kuti kumucheto kwemberi kweshaft kuende pasi.Iyo eccentric cam yakabatana nayo inotenderera inopesana newachi, uye roller inotenderera newachi uye yoenda kuruboshwe.Tambanudza chitubu chemhinduro.Sezvo chikamu chezasi chemhinduro chitubu chinotambanudza lever 2 uye ichienda kuruboshwe, inosvika pachiyero chesimba nechiratidzo chinomanikidza chinoshanda pamabhero, saka vharafu inogadziriswa pane imwe nzvimbo uye haifambi.
Kuburikidza nesumo iri pamusoro, iwe unofanirwa kuve nekumwe kunzwisisa kweiyo mechanika yevharuvhu chinzvimbo.Kana iwe uine mukana, zviri nani kuibvisa kamwe chete paunenge uchiishandisa, uye kudzamisa nzvimbo yechikamu chimwe nechimwe chenzvimbo uye zita rechikamu chimwe nechimwe.Nokudaro, hurukuro pfupi yemavharuvhu emagetsi inosvika kumagumo.Zvadaro, tichawedzera ruzivo kuti tiwane kunzwisisa kwakadzama kwekugadzirisa mavharuvhu.
kuwedzera ruzivo
Kuwedzera ruzivo
Iyo pneumatic diaphragm inodzora vharafu iri pamufananidzo imhando yakavharwa nemhepo.Vamwe vanhu vanobvunza kuti, sei?
Kutanga, tarisa kumhepo inopinza kutungamira kweiyo aerodynamic diaphragm, inova mhedzisiro yakanaka.
Chechipiri, tarisa nzira yekuisa yevhavha core, iyo yakanaka.
Pneumatic diaphragm air chamber ventilation source, diaphragm inotsikirira pasi zvitubu zvitanhatu zvakafukidzwa nediaphragm, nokudaro richisunda dzinde revharuvhu kuti riende pasi.Dzinde revharuvhu rakabatana nepakati pevharuvhu, uye simbi yevharuvhu inoiswa kumberi, saka iyo mhepo sosi ndiyo vharafu Fambisa kunzvimbo yekudzima.Nokudaro, inonzi valve air-to-close.Kutadza kuvhurika kunoreva kuti kana mhepo yekufambisa ichikanganiswa nekuda kwekuvakwa kana kuora kwepombi yemhepo, vharuvhu inogadzwa patsva pasi pesimba rekuita rechirimo, uye vharafu iri munzvimbo yakazaruka zvakakwana zvakare.
Nzira yekushandisa sei vharafu yekuvhara-mhepo?
Nzira yekushandisa nayo inofungidzirwa kubva pakuona kwekuchengeteka.Iyi ndiyo mamiriro anodiwa pakusarudza kana kuvhura kana kudzima mhepo.
Semuyenzaniso: chigubhu cheupfu, chimwe chezvishandiso zvepakati zvebhailer, uye vharafu inodzora inoshandiswa muhurongwa hwekupa mvura inofanira kunge yakavharwa nemhepo.Sei?Semuenzaniso, kana gasi rinobva kana magetsi akangoerekana avhiringidzwa, choto chichiri kupfuta nechisimba uye chinoramba chichipisa mvura mudhiramu.Kana gasi rinoshandiswa kuzarura valve inogadzirisa uye simba rinokanganiswa, valve ichavharwa uye dhiramu ichapiswa mumaminitsi pasina mvura (yakaoma inopisa).Izvi zvine ngozi zvikuru.Hazvibviri kutarisana nekugadzirisa kukundikana kwevhavha munguva pfupi, izvo zvinotungamirira kukuvhara kwechoto.Tsaona dzinoitika.Nokudaro, kudzivirira kupisa kwakaoma kana kunyange tsaona yekuvhara moto, gasi rekuvhara-vhavha rinofanira kushandiswa.Kunyange zvazvo simba racho richivhiringidzwa uye vharuvhu inotonga iri munzvimbo yakazaruka zvakakwana, mvura inoramba ichidyiswa mudhiramu rehutsi, asi haizokonzeri mari yakaoma mudhiramu rehutsi.Pachine nguva yekutarisana nekugadzirisa kukundikana kwevhavha uye choto hachizovharirwi zvakananga kuti zvigadzirise.
Kuburikidza nemienzaniso iri pamusoro apa, iwe zvino unofanirwa kuve nekunzwisisa kwekutanga kwekusarudza mavharuvhu ekudzora anovhura mhepo uye mavharuvhu ekuvhara mhepo!
Kuwedzera Ruzivo 2
Iyi ruzivo rushoma ndeye shanduko mune zvakanaka uye zvakaipa mhedzisiro yelocator.
Ivhavha inogadzirisa mumufananidzo inobata zvakanaka.Iyo eccentric cam ine mativi maviri AB, A inomiririra kumberi uye B inomiririra divi.Panguva ino, A side rakatarisana nekunze, uye kutendeudzira divi reB kunze ndiko kuita.Naizvozvo, kushandura iyo A dhairekitori pamufananidzo kuenda kuB kutungamira ndeye reaction mechanical valve positioner.
Iwo chaiwo mufananidzo uri pamufananidzo ndeye yakanaka-inoita vharafu chinzvimbo, uye controller inobuda chiratidzo ndeye 4-20mA.Kana 4mA, chiratidzo chemhepo chinoenderana 20Kpa, uye vharuvhu yekudzora yakavhurika zvizere.Kana 20mA, chiratidzo chemhepo chinoenderana 100Kpa, uye vharafu inogadzirisa yakavharwa zvizere.
Mechanical valve positioners ane zvakanakira nekuipira
Zvakanakira: kunyatso kudzora.
Kukanganisa: Nekuda kwekutonga kwepneumatic, kana chiratidzo chenzvimbo chichifanira kudzoserwa kukamuri yepakati yekudzora, imwezve magetsi ekushandura mudziyo inodiwa.
Kuwedzera ruzivo katatu
Zvinhu zvine chekuita nekuputsika kwezuva nezuva.
Kutadza panguva yekugadzira kwakajairika uye chikamu chemaitiro ekugadzira.Asi kuitira kuchengetedza kunaka, kuchengeteka, uye huwandu, matambudziko anofanirwa kugadziriswa nenguva.Uku ndiko kukosha kwekugara mukambani.Nokudaro, tichakurukura muchidimbu zviitiko zvinoverengeka zvekukanganisa zvakasangana nazvo:
1. Kubuda kwevhavha positioner yakafanana nekamba.
Usavhura chivharo chemberi chevhavha positioner;teerera kune ruzha kuti uone kana pombi yemhepo yakatsemuka uye ichikonzera kuvunza.Izvi zvinogona kutongwa neziso rakashama.Uye teerera kana paine ruzha rwekudonha kubva mukamuri yekupinza yemhepo.
Vhura chivharo chemberi chevhavha positioner;1. Ingave iyo orifice inogara yakavharwa;2. Tarisa nzvimbo ye baffle;3. Tarisa elasticity yechitubu chemhinduro;4. Bvisa square valve uye tarisa diaphragm.
2. Kubuda kwevhavha positioner kunofinha
1. Tarisa kana mhepo yemhepo inomanikidza iri mukati meiyo yakatarwa uye kana tsvimbo yemhinduro yadonha.Iri ndiro danho rakareruka.
2. Tarisa uone kana mutsara wechiratidzo wiring wakarurama (matambudziko anomuka gare gare anowanzo furatirwa)
3. Pane chinhu chakanamira pakati pecoil nearature?
4. Tarisa kana nzvimbo inofananidzwa yemuromo uye baffle yakakodzera.
5. Tarisa mamiriro e electromagnetic component coil
6. Tarisa kana nzvimbo yekugadzirisa yebhanhire spring inonzwisisika
Zvadaro, chiratidzo chinopinza, asi kubudiswa kwemhepo hakushanduki, kune kubuda asi hakusviki kuhuwandu hwehuwandu, nezvimwewo. Izvi zvikanganiso zvinosanganawo mukukanganisa kwezuva nezuva uye hazvizokurukurwa pano.
Kuwedzera ruzivo mana
Regulating valve stroke adjustment
Munguva yekugadzirwa kwekugadzira, kushandisa vheji yekudzora kwenguva yakareba kunotungamirira kune sitiroko isina kururama.Kazhinji kutaura, pane nguva dzose kukanganisa kukuru paunenge uchiedza kuvhura imwe nzvimbo.
Iyo sitiroko ndeye 0-100%, sarudza iyo yepamusoro poindi yekugadzirisa, iyo iri 0, 25, 50, 75, uye 100, zvese zvinoratidzwa sezvikamu.Kunyanya kune ma mechanical valve positioners, kana uchigadzirisa, zvinodikanwa kuziva nzvimbo dzezvikamu zviviri zvebhuku mukati memugadziri, kureva kugadzirisa zero nzvimbo uye nguva yekugadzirisa.
Kana tikatora vheji yekudzora mhepo yekuvhura semuenzaniso, gadzirisa.
Danho 1: Pane zero yekugadzirisa nzvimbo, kamuri yekudzora kana chiratidzo jenareta inopa 4mA.Ivhavha inogadzirisa inofanira kuvharwa zvakakwana.Kana isingakwanisi kuvharwa zvakakwana, ita zero kugadzirisa.Mushure mekugadzirisa zero kwapera, gadzirisa zvakananga 50% poindi, uye gadzirisa span zvinoenderana.Panguva imwecheteyo, cherechedza kuti tsvimbo yemhinduro uye tsinde yevhavha inofanira kunge iri mumamiriro akareba.Mushure mekugadziriswa kwapera, gadzirisa iyo 100% point.Mushure mekugadziriswa kwapera, gadzirisa kakawanda kubva pamapoinzi mashanu pakati pe0-100% kusvika kuvhurwa kwacho kwakaringana.
Mhedziso;kubva pa mechanical positioner kuenda kune intelligent positioner.Kubva pakuona kwesainzi uye tekinoroji, kukurumidza kusimudzira kwesainzi uye tekinoroji kwakaderedza kuwanda kwebasa kwevashandi vepamberi pekugadzirisa.Ini pachangu, ndinofunga kuti kana iwe uchida kurovedza maoko-paunyanzvi uye kudzidza hunyanzvi, mechanic positioner ndiyo yakanyanya kunaka, kunyanya kune vatsva vezviridzwa.Kuti uise pachena, nzvimbo ine njere inogona kunzwisisa mazwi mashomanana mubhuku uye kungofambisa zvigunwe zvako.Ichazvigadzirisa zvese kubva pakugadzirisa zero point kusvika pakugadzirisa huwandu.Ingomirira kuti ipedze kutamba uye uchenese chiitiko.Ingoenda.Kune iyo mechanika mhando, zvikamu zvakawanda zvinoda kupatsanurwa, kugadziridzwa uye kudzorerwa wega.Izvi zvichanyatso kuvandudza kugona kwako kwemaoko uye kuita kuti iwe uwedzere kufadzwa nechimiro chayo chemukati.
Zvisinei nekuti ine hungwaru here kana kuti isina hungwaru, inoita basa guru mukuita kwese kweotomatiki kugadzira.Kana yango "rova", hapana nzira yekugadzirisa uye automated control haina zvazvinoreva.
Nguva yekutumira: Aug-31-2023