Isiphumo se-pneumatic valve positioner pneumaticivalvezivaliwe izizathu eziphambili kunye nezisombululo
I-valve positioner (ekwabizwa ngokuba yi: Pneumatic valve positioner) yinxalenye ebalulekileyo yokulungelelanisa ivalve, edla ngokusetyenziswa kunye nevalve yokulawula ukuzilawula ngokwayo, iqhutywa ngumqondiso wokuphuma komlawuli, kunye nomqondiso wokuphuma kwayo ukulawula i-self-actuating valve. Ivalve yolawulo esebenzayo, xa indawo yevalve yolawulo, i-stem offset iphinda iphinde ibuyiselwe kwindawo yevalve ngesixhobo sombane, indawo yeValve ithunyelwa kwisoftware yenkqubo yeqonga ngokomqondiso wombane.
I-valve positioner (ekwabizwa ngokuba yi: Pneumatic valve positioner) yinxalenye ebalulekileyo yokulungelelanisa ivalve, edla ngokusetyenziswa kunye nevalve yokulawula ukuzilawula ngokwayo, iqhutywa ngumqondiso wokuphuma komlawuli, kunye nomqondiso wokuphuma kwayo ukulawula i-self-actuating valve. Ivalve yolawulo esebenzayo, xa indawo yevalve yolawulo, i-stem offset iphinda iphinde ibuyiselwe kwindawo yevalve ngesixhobo sombane, indawo yeValve ithunyelwa kwisoftware yenkqubo yeqonga ngokomqondiso wombane. Ulwakhiwo lwesimo sevalvu: Isihleli sevalve ngokolwakhiwo kunye nomgaqo-siseko sinokwahlulwa ngokwendawo yevalve yomoya, ivalve yombane-yegesi yevalve yendawo ekrelekrele. I-valve positioner inokwandisa amandla okuphuma kwevalve yohlengahlengiso, ukunciphisa uhlengahlengiso lokuhambisa umqondiso, ukukhawulezisa isantya se-stem, inokuphucula ivalve ye-linear, ikhuphe i-stem friction force kwaye isuse impembelelo yamandla angalinganiyo, iqinisekise ngokupheleleyo indawo echanekileyo nechanekileyo. yevalve yohlengahlengiso. I-valve positioner ehambelanayo uhlobo oluqhelekileyo lwe-actuator pneumatic actuator, i-actuator yombane, ilungiselelo le-stroke ethe ngqo, Umahluko we-Angle stroke setting.
Isetyenziselwa i-automatic, i-manual type ivula kwaye ivale zonke iintlobo zeevalvu, iifeni, njl. I-valve stem offset signal ithathwa njengengxelo yegalelo echanekileyo yokulinganisa umqondiso, kunye nomqondiso wemveliso yebhodi yokulawula ithathwa njengophawu lokumisela uthelekiso. Xa ezi zimbini zihluke, umqondiso wokuphuma kwi-activator utshintshwa ukwenza indawo ye-actuator, kunye ne-one-to-one imbalelwano phakathi kwe-valve stem offset times kunye nomqondiso we-output yebhodi yokulawula imisiwe.
Ngoko ke, i-valve positioner yenza inkqubo yokulawula impendulo kunye ne-stem offset njengophawu oluchanekileyo lokulinganisa kunye nemveliso yebhodi yokulawula njengophawu lokumisela. Ulawulo oluguquguqukayo lwenkqubo yolawulo luphawu oluphumayo lwendawo yevalve kwi-actuator. Isitshixo sendawo yevalvu kuphawu lwahlulwe ngokwendawo yevalve yepneumatic kunye nesixhobo sombane sendawo yokubeka ivalvu. Isignali yokufaka i-pneumatic valve positioner ngumqondiso oqhelekileyo wegesi, umzekelo, i-20 ~ 100kPa isignali yegesi, isignali yayo yemveliso ikwangumqondiso wegesi oqhelekileyo. Isixhobo sombane sevalve yokubeka isignali yombane kukuhamba kombane okusemgangathweni okanye umqondiso wamandla ombane osebenzayo, onje nge-4 ~ 20mA isiginali yokuhamba kombane okanye i-1 ~ 5V isignali yamandla ombane esebenzayo, isixhobo sombane sevalvu yendawo yesakhiwo sangaphakathi iya kuguqulwa ibe ngamandla ommandla wemagnethi, emva koko igesi ephumayo. uphawu kwivalve elawula uxinzelelo olujikelezayo. Ngokwalathiso lwendawo lunokwahlulwa lube yivalve yendawo enye kunye ne-double valve positioner.
Unilateral valve positioner nge piston machine actuator, ivalve positioner indawo enye kuphela idlala indima, ivalve positioner double acts acting in both the piston machine actuator cylinder, idlala indima kwiindlela ezimbini. Ngokwesiphumo sendawo yevalve kunye nexabiso lokuzuza lophawu longeniso oluphawulwe kwisimo sendawo yevalve enesiphumo esilungileyo kunye nesibonisi sevalvu yokusabela.
Xa isignali yegalelo ye-positive-effect valve positioner iphakanyisiwe, umqondiso wesiphumo nawo unyuswe, ukwenzela ukuba ixabiso lokuzuza lilungile.
Xa isignali yegalelo ye-reaction valve positioner iphakanyisiwe, isignali yemveliso iyancitshiswa kwaye ixabiso lokuzuza libi. Ngokwesiphawuli sendawo yevalve yisignali yokulinganisa okanye isignali yedatha, inokohlulwa ngokwendawo yevalvu jikelele kunye nojongano lwekhompyuter isixhobo sombane sokwenza ivalvu yendawo.
Isiginali yohlobo lwesimo sevalvu ngokubanzi lulinganiso loxinzelelo olusemgangathweni okanye ukuhamba kombane, umqondiso wamandla ombane osebenzayo, ujongano lwekhompyutha isixhobo sombane sevalvu yohlobo lwesiphawuli luphawu lwedijithali lojongano lwekhompyuter. Ngokwendawo yevalve yevalve ayikho kwi-CPU inokwahlulwa ngokwendawo yevalvu yesixhobo sombane jikelele kunye nesihleli sevalvu yombane ekrelekrele.
Isixhobo sombane jikelele sevalvu yokubeka indawo ayinayo i-CPU, ngoko ke, ayinangqondo, ayinakusombulula ubalo olukrelekrele olufanelekileyo. Ubukrelekrele bevalve positioner nge-CPU, inokusombulula ubalo olukrelekrele olunxulumeneyo, olufana nesantya somsebenzi wamadlozi wetshaneli yembuyekezo yenkqubo, ujongano lwekhompyuter isixhobo sombane sevalvu yokubeka indawo inokuthatha i-PID kunye nezinye iimodyuli zenkqubo, gqibezela ubalo oluhambelanayo. I-valve ye-pneumatic ivale izizathu eziphambili kunye nezisombululo kuqala kuzo zonke, makhe sihlalutye i-valve ye-pneumatic valve evaliweyo yintoni ebangela ukuba i-valve ibe nomlinganiselo othile wokuvuza, ukubona ukuba ukuvuza kwevalve kuphezulu kunexabiso eliqhelekileyo. ngaphaya yingxaki yomgangatho wemveliso. Okwesibini, imveliso yokuguqula umbane ayidityaniswanga noxinzelelo olusebenzayo lwefilimu yevalve. Nokuba ivalve ibambeke ebumdaka.
I-valve kuqala kuzo zonke, makhe sihlalutye i-valve yevalve ye-pneumatic esebenza ngokwayo evaliweyo yintoni ebangela ukuba umnyango ube nomlinganiselo othile wokuvuza, ukubona ukuba ukuvuza kwevalve kuphezulu kunexabiso eliqhelekileyo, ngaphaya kwengxaki yomgangatho wemveliso. Okwesibini, imveliso yokuguqula umbane ayidityaniswanga noxinzelelo olusebenzayo lwefilimu yevalve. Nokuba ivalve ibambeke ebumdaka.
I-valve spring force ayingeni kakuhle. Ingaba isiqu sibambekile.
Undoqo wevalve, uxinzelelo oluphezulu lwesango ivelufa yokunxiba ifilimu yentloko yevalve idiskhi yokuvuza umphunga.
Iimpazamo zesixhobo sokubeka eziqhelekileyo.
Ivalve yokuvula umoya, i-zero torsion spring axial force inkulu kakhulu. Isiqu sifutshane kakhulu.
Lungisa i-valve ngaphambi nangemva kokuhlukana koxinzelelo kukhulu kakhulu, yintoni ingxaki yokukhetha imodeli.
Nokuba amandla emveliso ye-actuator incinci kakhulu, i-adjustable enkulu esebenzayo yoxinzelelo olusebenzayo (PF yokwandisa amandla emveliso, ivalve yokuvala igesi, ukujikeleza ngasekhohlo kwenxalenye yohlengahlengiso (ikhululekile), oko kukuthi, PO ~ PL shift, kodwa kufuneka ukuba anikele ingqalelo utshintsho ulungiselelo stroke ngokupheleleyo No.
Sinokuqala sifumane isizathu kwaye sisebenzise isisombululo kule nkcazo ingentla. Ukuba unevalve ye-pneumatic manual, ngoko ngalo lonke ixesha inqunyanyiswa, vumela wonke umntu ajinge afe, kodwa kwakhona uvumele abasebenzi bedeshibhodi, balinganise kwakhona, i-zero kunye ne-positioning instrument calibration kwakhona; Kukho izizathu ezininzi zokuba kutheni ilungiselelo lokuhamba lendawo yokuvala lingekho, isiqu sevalve sinxitywa ngokuyinxenye, kwaye uxinzelelo lwegesi olucinezelekileyo lufikelela kumgangatho. Okokuqala, seta ixabiso le-valve positioner, kwaye emva koko ulungelelanise ilungiselelo lokuhamba lendawo yokuvala; Iivalvu zingumoya – zivuliwe okanye zingumoya – zivale iivalvu. Ukuba i-valve yegesi, inokubona i-valve ye-pneumatic esebenzayo yoxinzelelo, isixhobo sokubeka i-zero yokulinganisa uluhlu alunangxaki, ukongeza, akukho valve yekhadi. Ukuba i-valve evulekileyo yegesi, ivalve ye-pneumatic yaphukile, ivalve kufuneka ivalwe. Ukuba ayivalwanga, kusenokwenzeka ukuba ipleyiti ye-oyile yevalve ayinazo izinto ezimdaka ezincamatheleyo; Ukuba i-valve ivalwe ngengozi, kucetywayo ukubuza ukuba uxinzelelo lwepaneli yesixhobo kwanele, oko kukuthi, ingaba imveliso yoxinzelelo lwe-locator inokulungelelanisa uxinzelelo olusebenzayo lwe-valve evaliweyo; Jonga uxinzelelo olusebenzayo lwevalve ye-pneumatic alwanelanga, kwaye emva koko ujonge i-valve ukuba kukho imeko yekhadi, okanye ukuvuza, nayo ivaliwe.
Isixhobo esifanelekileyo sokubeka isimbo sokuqala siza; Ivalve yomoya: 1, amandla e-axial entwasahlobo ayanelanga, inokwandiswa ngokufanelekileyo. I-2, imeko yokusebenza ivumela, i-valve kufuneka isuswe ukwenza uvavanyo loxinzelelo, thatha eli thuba ukujonga imeko yokutywinwa kwe-valve core ye-valve ephezulu yoxinzelelo lwesango, kunye nokuba kukho umonakalo kwi-core valve kunye ne-valve yesango loxinzelelo oluphezulu.
3. Ukuba imeko yokungavalwa kwakhona kwenzeka, ivalve inokusikwa ukujonga ukuba kukho izinto ezimdaka kwivalve yesango loxinzelelo oluphezulu lwentliziyo yevalvu. 4. 1. Amandla e-axial entwasahlobo makhulu kakhulu, anokunciphisa ngokufanelekileyo. 2.
I-3, ukuba imeko iphinda ibonakale isondele ingafi, inokunqumla i-valve, khangela ukuba kukho izinto ezingcolileyo kwi-valve yentliziyo ye-valve ephezulu yoxinzelelo lwesango 4, khangela i-valve ye-pneumatic i-valve yokusebenza ayiphutha 5, khangela ukuba kukho umonakalo. kwi-valve disc 6, khangela ukuba indawo ye-zero yevalve iphezulu ukuba umsebenzi wenziwa emva kwesiganeko sokuvala singafi, Kucetywayo ukujonga iiparitha eziphambili zevalve ukubona ukuba kukho nawuphi na umahluko phakathi iiparamitha eziphambili ezilungiselelweyo kunye nemeko yokwenyani yokusebenza.
Ixesha lokuposa: Mar-01-2023
