Kusamala pakusankhidwa koyenera kwa ma valve pomanga mapaipi omangira - Chitsogozo pakusankha ma valve ofunikira m'malo owongolera

Kusamala pakusankhira koyenera kwa mavavu pomanga mapaipi omangira - Kalozera pakusankha koyika ma valve pamalo owongolera Pomanga mapaipi, ma valve amagwira ntchito yowongolera madzimadzi. Chifukwa cha mapangidwe osiyanasiyana ndi zinthu, kotero ma valve opangidwa sali ofanana. Pofuna kuonetsetsa kuti dongosolo la mapaipi likhoza kukwaniritsa bwino kwambiri, mtengo wotsika komanso moyo wautali wautumiki, kusankha koyenera kwa ma valve ndikofunika kwambiri. Valavu ili ndi ntchito zinayi zazikulu: kuyamba ndi kuyimitsa kutuluka kwa media; Sinthani kuyenda kwapakati; Imaletsa kubwerera mmbuyo kapena reflux ndikuwongolera kapena kuchepetsa kuthamanga kwamadzi. Kusankhidwa kwa makina opangira mapaipi angaganizidwe molingana ndi kutentha, mtundu wapakati, kutentha ndi zina. , mwachitsanzo, mu nyumba yapamwamba yopangira ma valve oyendetsa moto ayenera kugwiritsidwa ntchito chizindikiro, izi zikugwirizana ndi ngati makina oyendetsa moto ndi chinsinsi chogwiritsira ntchito mwanzeru, pamene ma valve oyendetsa moto amaikidwa kuti awonetse valavu, ndi valavu yotseguka kuti iwonetsere pakati pa kayendetsedwe ka moto, kuti athe kuyang'anira kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake dongosolo la hydrant, lomwe liyenera kulipidwa. Mtundu wa valavu WOGWIRITSA NTCHITO mu makina opangira mapaipi omanga ayenera kusankhidwa molingana ndi mawonekedwe a nyumbayo. Ngati valavu yogwiritsidwa ntchito si yoyenera kwa mapangidwe a nyumbayo, zoopsa zingapo zomwe zingatheke zidzauka nthawi zonse. Kusankhidwa kwa ma valve positioner kudzakhudza mwachindunji ntchito ndi khalidwe la valve yoyendetsera ndi kayendedwe ka kayendetsedwe kake. Chifukwa chake momwe mungasankhire choyika ma valve molondola komanso moyenera ndikofunikira kwambiri pakuwongolera. Mawu ofunikira: chiwongolero chosankha choyika ma valve muzinthu zambiri zowongolera, choyika ma valve ndi chimodzi mwazinthu zofunika kwambiri. Pa ntchito inayake, ngati mukufuna kusankha malo oyenera (kapena abwino) a valve, muyenera kuganizira zotsatirazi: 1) Kodi cholozera cha valve chingakhale "kugawanika"? Kodi ndizosavuta komanso zosavuta kukhazikitsa "kugawa"? Kukhala ndi "kugawanika" kumatanthawuza kuti choyika ma valve chimangoyankha pamasinthidwe osiyanasiyana (mwachitsanzo, 4 mpaka 12mA kapena 0.02 mpaka 0.06MPaG). Choncho, ngati mungathe "kugawa", mungathe malinga ndi zosowa zenizeni, chizindikiro chimodzi chokha chothandizira kuti mukwaniritse kulamulira kwa ma valve awiri kapena kuposerapo. 2) Kodi kusintha kwa zero point ndi mtundu ndikosavuta komanso kosavuta? Kodi ndizotheka kusintha ziro ndi kusiyanasiyana popanda kutsegula chivindikiro? Komabe, ndikofunikira kuzindikira kuti nthawi zina kusintha kotereku kumayenera kuletsedwa kuti tipewe kuchita zolakwika (kapena zosaloledwa). 3) Kodi kukhazikika kwa ziro ndi mtundu wanji? Ngati ZERO NDI RANGE NDI ZOTHANDIZA KUKHALA NDI KUSINTHA KWA KUYERA, KUGWIRITSA NTCHITO, NTHAWI, KAPENA KUPIRITSIDWA KWA NTCHITO, VALVE POSITIONER IDZAFUNIKA KUBWERETSEDWERA KABWINO KUTI KUSINTHA KUYENDA KWAMBIRI KWA REGULATOR. 4) Kodi choyika valavu ndi cholondola bwanji? Momwemo, kuti mulowetse chizindikiro, Trim Parts of valve (Trim Parts, kuphatikizapo spool, tsinde, mpando wa valve, etc.) nthawi iliyonse iyenera kuyikidwa molondola pamalo ofunikira, mosasamala kanthu za kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake kuti katundu wambiri wamkati. 5) Kodi kufunikira kwa mpweya wa valve positioner ndi chiyani? Pokhapokha mayunitsi ochepa kwambiri operekera mpweya angaperekedwe kuti akwaniritse miyezo ya ISA (miyezo yamtundu wa mpweya wa zida: ISA STANDARD F7.3) KWA AIR, KOCHOKERA, KWA AIR-MOBILIZED OR ELECTRIC-GAS (VALVE) POSITIONERS, NGATI AKUTI ALIBE ZINTHU ZOKHALA ZINTHU ENI-ENI, AYENERA KUKHALA KUKHALA NDI UWIRI WINA WA FUMBIRI, CHINYENGWE NDI MAFUTA. 6) Kodi mawerengedwe a ziro ndi osiyanasiyana amakhudza wina ndi mnzake kapena ali paokha? Ngati zikhudzana, mazero ndi mizere zimatenga nthawi yochulukirapo kuti zisinthe, chifukwa chochuniracho chimayenera kusintha mobwerezabwereza magawo awiriwa kuti pang'onopang'ono afike pomwe pali. 7) Kodi choyika ma valve chili ndi "Bypass" yomwe imalola kuti chizindikirocho chizigwira ntchito mwachindunji pa owongolera? "Kulambalala" kumeneku nthawi zina kumatha kupangitsa kuti zikhale zosavuta kapena kusiya kusanja kwa Zosintha za Actuator, monga: "Mayimidwe a Benchset" ndi "Seat Load setting" ya actuator -- izi ndichifukwa choti nthawi zambiri, chizindikiro cha aerodynamic cha owongolera ma pneumatic. zimagwirizana ndi "mpando" wa actuator ndendende kotero kuti palibe kuyika kwina kofunikira (kwenikweni, pakadali pano, ma Valve positioners akhoza kuthetsedwa kwathunthu. Zoonadi, ngati zasankhidwa, ndiye kuti choyimira cha valve chingagwiritsidwenso ntchito "kulambalala" chizindikiro chotulutsa pneumatic cha chowongolera pneumatic mwachindunji pa chowongolera). Mu ZOWONJEZERA, ndi "bypass" nthawi zina zimatha kuloleza kusintha pang'ono kapena kukonza kwa valve positioner pa intaneti (ndiko kuti, kugwiritsa ntchito valve positioner "bypass" kuti woyang'anira apitirizebe kugwira ntchito yachibadwa, popanda kukakamiza wolamulira kunja kwa intaneti. ). 8) Kaya ntchito ya valavu positioner ndi mofulumira? Kuthamanga kwa mpweya Kuchuluka kwa mpweya (wotchedwa valve locator nthawi zonse amafanizitsa chizindikiro cholowera ndi mlingo wa valve ndikusintha zotsatira zake molingana ndi kusiyana kwake. Ngati choyimira valavu chikuyankha mofulumira pakupatuka uku, ndiye kuti mpweya wochuluka umayenda pa nthawi ya unit), mofulumira kusintha. system AMAYANKHA ku Setpoint ndikusiyanitsa kusiyanasiyana - zomwe zikutanthauza cholakwika chocheperako (lag) komanso kuwongolera bwino. 9) Mawonekedwe a Frequency of the valve positioner (kapena Frequency Response, Frequency Response -- G (jω), ndi chiyani chomwe chimayankhidwa mokhazikika pamakina a sinusoidal? kukhudzika kwa kuyankha pafupipafupi), m'pamenenso kuwongolera kumayendera bwino, komabe, ziyenera kudziwidwa kuti mawonekedwe afupipafupi amayenera kutsimikiziridwa ndi Njira Zoyesera Zosasinthika m'malo mwa njira zongoyerekeza, ndipo choyimira valavu ndi chowongolera ziyenera kuganiziridwa palimodzi powunika. mawonekedwe afupipafupi 10) Kodi kuchuluka kwamphamvu kwa mpweya kwa choyika valavu ndi chiyani? Mwachitsanzo, ma valve ena oyika ma valve amakhala ndi mphamvu yokulirapo ya mpweya wa 501b/in (ie 50psi, lpsi =0.07kgf/cm ≈ 6.865kpa), choyimitsa valavu chimakhala cholepheretsa kutulutsa mphamvu kwa actuator ngati actuator idavotera kuti igwire ntchito. pazovuta zokwera kuposa 501b/in. 11) Pamene valavu yoyang'anira ndi choyika valavu zasonkhanitsidwa ndikuphatikizidwa, nanga bwanji Positioning Resolution? Izi zimakhala ndi zotsatira zoonekeratu pa kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake. kuti achepetse kusintha kwanthawi ndi nthawi kwa kuchuluka komwe kumayendetsedwa. 12) Kaya kutembenuka kwabwino ndi koyipa kwa choyika ma valve ndikotheka? Kodi kusinthako ndikosavuta? Nthawi zina mbali imeneyi ndi yofunika. CHITSANZO, KUTI MUSINTHA "SIGNAL INCREASE-VALVE CLOSE" mode kukhala "SIGNAL INCREASE-VALVE OPEN", MUNGAGWIRITSE NTCHITO NTCHITO YOSINTHA YOTSATIRA NDI YOYAMBA ya VALVE POSItioner. 13) Kodi ndizovuta bwanji kugwira ntchito kwamkati ndikukonza choyika ma valve? Monga tonse tikudziwira, mbali zambiri, zimakhala zovuta kwambiri momwe ntchito zamkati zimagwirira ntchito, maphunziro ambiri okonza (kukonza) ogwira ntchito, ndi zina zowonjezera zomwe zilipo. 14) Kodi Steady-state Air Consumption ya choyika ma valve ndi chiyani? Pazinthu zina zoyika mbewu, chizindikiro ichi ndi chofunikira kwambiri ndipo chikhoza kukhala cholepheretsa. 15) Zoonadi, zinthu zina ziyenera kuganiziridwanso poyesa ndikusankha ma valve oyika. Mwachitsanzo, Feedback Linkage ya valve positioner iyenera kuwonetsa malo a spool; Kuphatikiza apo, choyika ma valve chiyenera kukhala champhamvu komanso chokhazikika, choteteza chilengedwe komanso kukana dzimbiri, komanso chosavuta kukhazikitsa ndikulumikizana.