Umsinga Flowmeter: umgaqo isenzo

flowmeters umsinga zisekelwe phezu periodicity zokutshintsha kontanga, senziwa ukuhamba emva imiqobo ethile ezikhoyo olusezimbizeni okanye ngexesha jet oscillation kunye umsinga Ukwakheka.

isithunzi

Isixhobo sokuqala sale hlobo ukuvela 60s kwinkulungwane yokugqibela. Ububi wabo uluhlu elincinane parameters zemilinganiselo imposiso ebalulekileyo. Electronic umsinga flowmeter mihla iye nobunzima kakhulu, ngempumelelo yaye wazuza iingenelo ezininzi, nto leyo ifanele ukubandakanya oku kulandelayo:

• lula isihlobo kwenkqubo womlinganiselo;
• idatha uhlale izinzile, akuxhomekekanga kwiqondo lobushushu kunye noxinzelelo ezikhoyo;
• umlinganiselo, ebonakala ichanile phezulu;
• umlinganiselo Imiqondiso linear;
• design zinamandla kwaye elula;
• uluhlu yokulinganisa olubanzi;
• izinto ezimile;
• phambi komsebenzi self-sifo kwezinye imifanekiso.

ukushiyeka

Rosemount umsinga Flowmeter yenzelwe ukusebenza imibhobho kunye nobukhulu diametrical of mm-20 ukuya 300, njengoko imibhobho kunye kwisayizi encinane kwahluke iyahlozinga ukusekwa omtsha, kunye nokusebenza kwindawo imali sezingeni eliphezulu kunzima. Ngenxa yoko akukho amathuba ukusetyenziswa kwi amazinga okuhamba kwamanzi asezantsi, ngenxa ukuntsonkotha lomlinganiselo uphawu kunye nokwehla kakhulu kuxinzelelo. Kwakhona lokungcangcazela kunye nesandi Iintlobo Ripples ingachaphazela ukusebenza ifowuni yakho. Njengoko eshukuma conduit isebenza kweziphazamiso kunye compressors. Ukupheliswa yabo kunokwenzeka ngokuthi nokolula vane, ekhwele e ugwebu, okanye ufake ezongezelelweyo uqhagamshelwano drive ikhawuntala kunye izihluzi elektroniki kwimeko somahluko iziganeko zemilinganiselo pulsation rhoqo.

ngezigaba

Kukho ezahlukeneyo ezintathu izixhobo ezahlulwe uhlobo lokuguqulela:

• Umsinga flowmeter, apho umzimba ezingenakususwa idlala indima isixhobo zaseprayimari. Ngokuthe ngcembe, ngapha nangapha kuyo walibumba moya ukubhabha emva esa umzimba yokwenene, ngenxa kunye yama- kwakhiwa.
• IiNdlela kunye kwemali ye converter zaseprayimari, apho pulsation xi eveliswa ngokuthi sizithathele imilo ifanele kwinxalenye eyandisiweyo mome.
• flowmeters umsinga, engatshiyo nje lokuguqulela. Kulo mzekelo, uxinzelelo pulsation of Jets enikiweyo intlokoma.

Iinguqulelo zokuqala ezimbini isixhobo elide ezingangeniyo kwinkcazelo a flowmeter umsinga. Kodwa ngenxa yemeko ziyatshintsheka uhuhamba uhlobo ukubana wesithathu, oko kubhekisela kudidi. Ukufana omkhulu iimpawu iqatshelwe inkqubo sicatshulwa lwalo wokuqala nowesithathu.

Flowmeter umsinga ukumatanisa i converter owenziwe

Xa umzimba ibiyelwe flow umendo ulwalathiso ukutshintsha moya, ngaxeshanye ukwandisa uqina kunye noxinzelelo amathontsi zabo. Utshintsho reverse kwenzeka emva kokuba yee-candelo le into. Ngecala reverse yakha koxinzelelo ephantsi, yaye ngaphambili - phezulu. Emva edlula umaleko umda oshiya umzimba phantsi kweempembelelo ucinezelo ephantsi kudala omtsha, yaye xa utshintsha isikhokelo. Oku Zinjalo zombini izabelo umzimba zihambe. Ukusebenza alternating ukubunjwa imisinga kumacala omabini, kuba aphazamisane lokusekwa omnye komnye. Nakuba ephawula nokudalwa Karman umkhondo.

umzimba flow Special uye moya ukusebenza Self-lokucoca ngenxa ewutha, nokuba iimeko kakhulu uyosuleleka, uhlambulukile ngamaxesha onke.

Imilinganiselo kunye wathandwa flow umlinganiselo ngqo amaza ukwenzeka imisinga, okuhambelana nesantya ubungakanani rhoqo, ngoko ke flow umthamo. Ukuba umsinga Ukwakheka ozinzileyo kwenzeka kumazinga asezantsi flow wenkqu, ngoko ke uluhlu flowmeter womlinganiselo we-20 l / min.

Uyilo ashukimisayo umzimba

Counter umsinga flowmeter ngokuqhelekileyo isekelwe into trapezoidal prismatic, uhlobo olunxantathu okanye uxande. Ukwakhiwa lwalo lokuqala ukuya amanzi. Banikwa ethile ilahleko xi ezinjalo izinto benziwa oscillations ngokuphindelela namandla ngokwaneleyo. Ukongeza, ali okhethekileyo yabhiyozelwa ukuguqulwa imiyalezo kwimveliso.

Umsinga flowmeter kwezinye iimeko ukusebenzisa isixhobo ezimbini iimeko ukuze kwandiswe iziganeko imveliso, meko leyo ke zicwangciswe kumgama elimisiweyo. Kwicala prisms yesibini buxande ezi piezoelectric, ezifihlakeleyo inwebu elastic zibhityile, ngokwenjenjalo ayinalo ithuba lokuphembelela ingxolo ive.

iintlobo ngokuguqulwa

Kukho iindlela ezininzi ukuguqula iziganeko imveliso yokutshintsha eddy. Isantya kakhulu ezifunyenwe yhuu izinto iimeko kunye notshintsho ngendlela uxinzelelo. Isiqalelo Ukuzibona yenye okanye ezimbini uhlobo conductive anemometer thermal. Used ultrasound, elidibanayo capacitive kunye ezenza flow transducer. Kuba ukusebenza kakuhle flowmeter omtsha kufuneka ube yinxalenye simahla osicaba umbhobho phambi kokuba omnye.

Ubunzima yokuyisebenzisa kwimibhobho kunye ubukhulu ukwanda okubangelwa yezi zizathu zilandelayo:

• Ukukhala nciphisa njalo;
• Ukukhala kwemveliso low;
• ukunciphisa inani elipheleleyo oscillations.

Le ifanele-ezimile flowmeters omtsha: umgaqo amanyathelo

Kwezi zixhobo ilifa converters yindlela ngokubhijela umjelo ezosulela inxalenye yalo mbhobho ecaleni layo elandisiweyo okanye amanzi esatsiba zezindlu encinane. Yakha ifanele senziwa ityhubhu, wayijikeleza axis yayo ijikeleza malunga axis ihamba kunye nayo i core umsinga. Ukugeleza indawo yayo ephezulu has a xi kwamaza ngaxeshanye kunye nentshukumo emboxo ye ngumongo, lo gama yona ilingana umthamo isantya sokuqukuqela okanye Velocity yomgama. thermoanemometers Conductive okanye ilungu electromechanical aguqulwa uqina okanye ukwenzeka pulsations ngenxa channels yokulinganisa. Le nkqubo ibandakanya lunezigaba ezibini: yokuqala ngokomthamo flow senziwa rhoqo omtsha precession ke similise umqondiso rhoqo.

Flowmeter esekelwe Jets jinga

Ehambahamba esatsiba, irhasi okanye umsinga ilulwelo a diffuser kunye necandelo cross ngokohlobo yoxande. Kwezinye iimeko, ukugeleza ithuba licinezelwe kwi kwindawo ethile iindonga ezahlukeneyo diffuser. Ugesi isixhobo jet kuthanjiswa ipropati kunciphisa uxinzelelo kummandla eliphezulu umbhobho esa, apho ezantsi nto ihlala efanayo kunye nentshukumo kudala ohambisa thelekela ezantsi diffuser. Emva kokuba umbhobho utshintsho yezithuthi kodini indalo, kuza jet-jinga.

Jet engena kwi ezantsi element diffuser kwi converters hydraulic ukubuyela umbhobho wokudibanisa uhamba kukukhupha inxalenye kuphela. Xa Stroke channel eliphezulu kwabelwa isabelo jet ze ngelixa ecanda amanzi esatsiba wokuqala, loo nto idluliselwa kwindawo esezantsi emfuleni ukusuka umlomo yesibini. Ke inxenye eyahlukileyo, wegqitha waya umjelo Stroke eliphezulu, inkqubo oscillation kwenzeka emva umklapp phantsi, lo gama kukho utshintsho ngaxeshanye kwi xi omabini kwemali.

Le inverter yale hlobo kusengqiqweni ngakumbi. Ngenxa engqongqo ngayo ibunjiwe kokubetha oscillation ukho nefuthe ngqo kwi umyinge wokuphelelwa njalo oscillation.

Zezona lwimi zisetyenziswa flowmeters umsinga Yokogawa ezifunyenwe imibhobho kunye omncinci ukuya kutsho kuma-90 mm. Kwezinye iimeko, olu hlobo ifowuni isetyenziswe njengento ethatha indawo kuba converters buso.

Namhlanje, umgangatho sokuqukuqela yokuvelisa ivela kwaye kukho izinto ezintsha, nangona izixhobo anjalo ixesha olude elide ukusetyenziswa. Developers bafuna design izixazululo ngempumelelo ngakumbi ukudala iinketho lobugcisa a ukusebenza ngaphezulu.