Uqwalaselo lweNdawo yeValve:

Izimiseli zevalvu zinokwahlulwa zibeiivalve zokubeka umoya, i-electro-pneumatic Valve positioner kunye ne-valve positioner ekrelekrele ngokwesakhiwo sayo kunye nomgaqo wokusebenza.
Indawo yevalve inokunyusa amandla okuphuma kwevalve elawulayo, inciphise i-lag yokuhambisa isiginali elawulayo, ikhawulezise intshukumo yesikhondo sevalve, iphucule umgca wevalve, yoyise ukungqubana kwesiqu sevalve kwaye isuse impembelelo yevalve. amandla angalinganiyo Ukuze kuqinisekiswe ukubeka okuchanekileyo kwevalve yokulawula.

Iiadaptha zeNdawo yeValve:

Ngokuqhelekileyo i-actuator pneumatic actuator, i-actuator yombane, kukho i-stroke ethe ngqo, i-angular stroke.Ukuvula ngokuzenzekelayo, ukuvulwa ngesandla kunye nokuvala zonke iintlobo zeevalvu, ipleyiti yomoya, njl.

UmGaqo wokuSebenza weSimiselo seValve:

Isiphawuli sevalve yeyona nto iphambili yevalve yokulawula.Ithatha i-valve stem uphawu lokushenxiswa njengophawu lokulinganisa igalelo lengxelo, ithatha isiginali yemveliso yomlawuli njengophawu lokumisela, iqhubela phambili nothelekiso, xa ezi zimbini zinenxaxhi, itshintsha isiginali yayo yokuphuma kwisixhobo sokulawula, ibangela isenzo sesixhobo sokulawula. , i-one-to-one imbalelwano phakathi kwe-multiple displacement ye-valve stem kunye nomqondiso wokuphuma komlawuli usungulwe.Ke ngoko, i-valve positioner iqulathe i-valve stem displacement measurement signal kwi-output ye-controller set of signal control system control system.Izinto eziguquguqukayo zesixokelelwano solawulo ziimpawu eziphumayo zesimo sevalvu kwi-actuator.

Ukuhlelwa kweeNdawo zeValve:

Isibonisi sevalvu ngokwesiginali yegalelo sahlulwe ngokwendawo yevalve yepneumatic kunye nevalve yendawo yombane.Isignali ye-pneumatic valve positioner isignali yegesi eqhelekileyo, umzekelo, i-20 ~ 100KPA isignali yegesi, isignali yayo yemveliso ngumqondiso wegesi oqhelekileyo.Isiginali yokufakwa kwendawo yevalve yombane ngumqondiso oqhelekileyo wangoku okanye umqondiso wombane, onje nge-4 ~ 20mA isiginali yangoku okanye i-1 ~ 5V isignali yombane, njl njl. ivalve yokulawula.
Ngokwesalathiso sentshukumo inokwahlulwa ibe yindlela enye yevalvu yokubeka indawo kunye neendawo ezimbini zevalvu.Xa ivalve yendlela enye isetyenziswa kwi actuator yePiston, ivalve positioner isebenza kwicala elinye kuphela, kwaye ivalve yendlela ezimbini isebenza macala omabini esilinda yepiston yo actuator nakumacala omabini.

Ngokwesiphumo sendawo yevalve kunye neesimboli zegalelo lokuzuza umqondiso zahlulwe zibe yindawo ekwindawo yevalvu e-positive kunye ne-negative valve positioner.Xa isignali yegalelo ye-positive-acting valve positioner inyuka, isignali yokuphuma nayo iyanda, ukwenzela ukuba inzuzo ilungile.Xa isignali yegalelo ye-counter-acting Valve positioner inyuswa, isignali yokuphuma iyancitshiswa kwaye, ngoko ke, inzuzo ingalunganga.

Ngokwesiphawuli sendawo yevalve yesiphawuli sisignali ye-analog okanye isignali yedijithali, inokohlulwa ibe yindawo yevalvu jikelele kunye nebhasi yebhasi yendawo yombane yombane.Umqondiso wegalelo lendawo yevalvu jikelele luxinzelelo lomoya lwe-analog okanye umqondiso wangoku kunye nombane, kunye nesignali yegalelo lendawo yokubeka ivalve yombane yebhasi luphawu lwedijithali lwebhasi yasendle.

Ngokumalunga nokuba ivalve yendawo ene-CPU inokohlulwa ibe yindawo yevalve yombane jikelele kunye nesibekeli-ndawo sevalvu yombane ekrelekrele.I-valve yombane jikelele yokubeka indawo ayinayo i-CPU, ngoko ke, ayinabo ubukrelekrele kwaye ayikwazi ukuphatha imisebenzi efanelekileyo yobukrelekrele.I-valve positioner ekrelekrele ene-CPU inokusingatha umsebenzi okrelekrele, umzekelo, inokuqhuba imbuyekezo engahambelaniyo yomjelo ohamba phambili, njl njl .