Debugging txoj kev rau pneumatic li qub

Pneumatic valve positioner yog ib qho tseem ceeb tshaj plaws pneumatic accessories rau pneumatic tswj li qub, ua tiav kev ua haujlwm ntawm qhov tseeb qhov chaw ntawm lub valve stroke txoj hauj lwm los ntawm kev txais cov cim tswj.
Kev ua haujlwm ntawm pneumatic valve positioner: Lub pneumatic valve positioner thiab pneumatic actuator koom ua ke tsim ib chav tswj tsis siv neeg thiab ntau yam tswj li qub. Tom qab kev debugging thiab installation, lawv tau ua ke los tsim ib lub pneumatic regulating valve. Pneumatic valve positioners yog siv nyob rau hauv ntau yam kev lag luam automation txheej txheem tswj teb.
Thaum lub pneumatic tswj valve tawm ntawm lub Hoobkas, ob qho tib si positioner thiab tswj valve tau calibrated. Txawm li cas los xij, tom qab lub valve tau teeb tsa rau ntawm cov kav dej, nws feem ntau yuav tsum tau calibrated dua. Cov txheej txheem calibration yog calibrate 5 ntsiab lus, xws li 4mA, 8mA, 12mA, 16mA, 20mA. Ntawm 12mA, lub tswv yim pas nrig ntawm lub positioner yog nyob rau hauv txoj kab rov tav, thiab lub valve txoj hauj lwm yuav tsum nyob ntawm 0,25%, 75%, thiab 100% ntawm cov hlab ntsha rau lwm pab pawg teeb liab, thiab lub kaum sab xis ntawm lub tswv yim pas nrig yuav tsum. tsawg dua los yog rho tawm 45 degrees. Qhov sib txawv ntawm xoom taw tes thiab tag nrho cov nplai tuaj yeem kho los ntawm kev kho cov ntsia hlau sib txuas sib cais. Nyob rau hauv ib txwm muaj xwm txheej, yog hais tias lub valve stroke sib haum mus rau lub teeb liab muab ib tug los ntawm ib tug, nws qhia tau hais tias lub calibration tiav.
Ib qho ntawm cov teeb meem tseem ceeb uas tshwm sim thaum lub valve kaw yog yuav ua li cas kom ua tiav tag nrho ntawm lub rooj zaum valve kom nruj lub valve. Txoj kev ib txwm yog los ntsuas lub valve kom cov khoom kaw (xws li cov ntsaws ntsaws valve, diaphragms, valve daim hlau, thiab lwm yam) yog nyob rau ntawm lub rooj zaum valve, es tsis lees paub tias cov khoom kaw yog kiag li tiv thaiv lub rooj zaum valve. Txhawm rau kom tswj tau tus nqi tsim tawm thiab tsis txhob xeb ntawm qhov sealing nto, nws yog ib qho tsim nyog los tsim kom muaj qhov tsim nyog sealing load.
Ib leeg ua yeeb yam pneumatic actuators feem ntau yog tsim los nrog cov yeeb yaj kiab nyias. Los ntawm kev siv txoj kev tsim no, lub caij nplooj ntoos hlav siv tuaj yeem txo lub rooj zaum lub rooj zaum thiab tseem tiv taus qhov kaw tag nrho. Ib tug raug ob leeg ua yeeb yam pneumatic actuator txais ib tug piston tsim. Siv cov qauv tsim no, tsis zoo li daim nyias nyias tsim, cov khoom siv siab tsis tas yuav txwv. Yuav kom ua tiav qhov siab dua kaw, tag nrho cov khoom siv siab tuaj yeem siv tau. Rau cov qauv tsim piston, qhov siab dua, qhov zoo dua qhov kev ruaj ntseg thiab tswj rhiab heev ntawm lub valve.