CTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Strict//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd”>
Butterfly mavharuvhu akareruka, madiki uye akareruka kupfuura mamwe marudzi ekudzora mavharuvhu, zvichiita kuti ive sarudzo yakanakisa yekudzora kuyerera mune akawanda application.Nechinyakare, standard butterfly mavharuvhu akashandiswa mune otomatiki on / off application uye iwo akakwana kune iri basa.Zvisinei. , mamwe mainjiniya anovaona seasingagamuchirwe kana zvasvika pakudzora kuyerera mune yakavharwa-loop system.
Butterfly mavharuvhu anoshandisa madhisiki anotenderera kuti adzore kuyerera nepapombi.Discs anowanzo shanda madhigirii 90, saka dzimwe nguva anonzi mavharuvhu emakona anotenderera.Kazhinji, anoshandiswa kana hupfumi hunoonekwa.Kana kuvharika kwakasimba kuchidikanwa, mavharuvhu e butterfly ane zvisimbiso zvakapfava elastomeric. uye/kana madhisiki akavharidzirwa anogona kushandiswa kupa kushanda kunodiwa.High Performance Butterfly Valves (HPBVs) - kana Double Offset Valves - ndiyo yava indasitiri yemhando yemavharuvhu ekudzora butterfly uye anoshandiswa zvakanyanya pakudzora throttling.Vanoita zvakanaka kune zvikumbiro ne dzvinyiriro isingaperi inodonha kana kuti inononoka process cycles.
Zvakanakira zveHPBV zvinosanganisira nzira yekuyerera yakatwasuka, hukuru hwepamusoro, uye kugona kupfuudza yakasimba uye viscous media zviri nyore.Vanowanzove nemutengo wakaderera wakaiswa wemhando ipi neipi yevhavha, kunyanya muNPS 12 uye hukuru hukuru.Kubatsira kwavo kwemari kunowedzera zvakanyanya. zvichienzaniswa nemamwe marudzi mavharuvhu muhukuru pamusoro 12 masendimita.
Vanopa maitiro akanaka ekuvhara-kuvharwa pamusoro pehupamhi hwekushisa uye anowanikwa mumhando dzakasiyana-siyana dzemuviri dzinosanganisira wafer, lug uye kaviri flanged.Idzo dzakareruka zvakanyanya muhuremu uye dzakanyanya kudarika mamwe marudzi evhavha.Somuenzaniso, 12-inch ANSI. Class 150 double-flanged segmented ball valve inorema 350 pounds uye ine face-to-face dimension ye13.31 inches, ukuwo 12-inch lug butterfly valve yakaenzana inorema mapaundi mazana maviri chete uye ine 3-inch face-to-face dimension.
Mavharuvhu eButterfly ane zvimwe zvinogumira zvinoita kuti asakodzere kudzora kuyerera mune mamwe maapplication.Izvi zvinosanganisira kushomeka kudonha kugona zvichienzaniswa neglobe ball mavharuvhu ane mukana mukuru wecavitation kana flash evaporation.
Nemhaka yokuti nzvimbo yakakura yedhisiki inoita sechitsigiro, ichishandisa simba rinoshanduka remhepo inoyerera kusvika kune shaft yemotokari, mavharuvhu e butterfly anowanzo haashandiswi pakushandiswa kwepamusoro.
Butterfly control valves dzimwe nguva inogona kunge yakanyanyisa, iyo inogona kukanganisa maitiro ekushanda.Izvi zvinogona kunge zvakakonzerwa nekushandiswa kwemavharuvhu akaenzana nemutsara, kunyanya mavhavhavhavhavhavha epamusoro-soro.Inogona kuwedzera kushanduka kwemaitiro nenzira mbiri.Kutanga, kuwandisa kunogona kupa vharafu yakawandisa kuwedzera, zvichisiya kushanduka kushoma pakugadzirisa controller.Chechipiri, vharafu yakawandisa inogona kushanda kakawanda pamazaru evharuvhu ezasi, uye kukweshana kwechisimbiso kungave kwakakura muvharuvhu yeshavishavi.Nekuti vharafu rakawandisa rinoburitsa shanduko yakakura isingaenzaniswi yekuyerera kwevharuvhu. yakapihwa kuwedzera kwekufamba kwevharuvhu, chiitiko ichi chinowedzeredza zvakanyanya kusiyanisa kwemaitiro kunoenderana nefriction-induced deadband.
Vatauriri dzimwe nguva vanoshandisa mavharuvhu eshavishavi kuti ave nemari kana kuti aenderane nekukura kwemutsara wakapihwa zvisinei nezvaasingakwanisi.Pane maitiro ekupfuura mavharuvhu eshavishavi kuti arege kudzvanya mapaipi, izvo zvinogona kutungamirira kukutonga kwakashata.
Iyo yakanyanya kuganhurirwa ndeyekuti iyo yakanaka throttle control range haina kupamhama sevharuvhu yebhora kana segmented ball valve.Mavharuvhu eButterfly haawanzo kuita zvakanaka kunze kwekutonga kweanenge 30% kusvika 50% yakavhurika.
Kazhinji, loop iri nyore kudzora kana iyo yekudzora loop ichishanda mumutsara fashoni uye nzira yekuwana iri pedyo nekubatana.Saka, nzira yekuwana 1.0 inova chinangwa chekutonga kwakanaka kwechiuno, ine mutsara unogamuchirwa we0.5 kusvika ku2.0 ( 4:1 chikamu).
Kuita kunonyanya kunaka kana yakawanda ye loop gain ichibva ku controller.Cherechedza kuti mu gain curve ye Figure 1, iyo process gain inova yakanyanya kukwira mudunhu iri pazasi about 25% ye valve kufamba.
Kuwana nzira inotsanangura hukama pakati pekugadzirwa kwechigadzirwa uye shanduko yekupinda.A stroke apo iyo nzira yekuwana inoramba iri pakati pe0.5 uye 2.0 ndiyo yakakwana yekudzora huwandu hwevhavha.Kana iyo nzira yekuwana isiri mu 0.5 kusvika 2.0 renji, yakashata dynamic performance uye loop kusagadzikana kunogona kuitika.
Butterfly dhisiki dhizaini ine zvakakosha pakuyerera kwevharuvhu sezvo vharuvhu ichienda kubva pakavharwa kuenda kuvhurika.Discs ane inherent yakaenzana muzana maitiro anogona kuripa zvirinani madonhwe ekumanikidza anosiyana nekuyerera.Equal percentage trims ichapa linear mounting maitiro ekusiyana kwekudonha kwedzvinyiriro, izvo is ideal.Chigumisiro chakanyatsojeka, imwe-kune-imwe yakasiyana pakati pekuyerera uye kufamba kwevhavha.
Butterfly mavharuvhu achangobva kuunza discs ane inherent yakaenzana muzana kuyerera maitiro.Izvi zvinopa kugadzwa ficha inobvumira kugadzwa kwekuita kuwana mune inodiwa 0.5 kusvika 2.0 siyana pamusoro yakafara strokes.Izvi zvinonyanya kunatsiridza throttle control, kunyanya munzvimbo yakaderera yekufamba.
Iyi dhizaini inopa kutonga kwakanaka, nekuwana kunogamuchirika kwe0.5 kusvika 2.0, kubva kunenge 11% yakavhurika kusvika 70%, inodokupetwa katatu kuwedzera kwekutonga siyana zvichienzaniswa neyakajairika high performance butterfly valve (HPBV) yehukuru hwakafanana. , zvikamu zvakaenzana zvemadhisiki zvinopa huwandu hwakaderera hwemaitiro akasiyana.
Butterfly mavharuvhu ane inherent akaenzana muzana hunhu, akadai Control-Disk vharafu, akanakira nzira inoda chaiyo throttling control performance.Idzo dzinogona kudzorwa padyo nenzvimbo yakatarwa yechinangwa zvisinei nekukanganisika kwemaitiro, kuderedza kushanduka kwemaitiro.
Kana vharuvhu yeshavishavi isiri kushanda zvakanaka, kungoitsiva nevharuvhu yakaenzana kunogadzirisa dambudziko racho.Semuenzaniso, kambani yemapepa iri kushandisa mavharuvhu maviri eshavishavi akakura zvakanyanya kudzora kubviswa kwemwando kubva mupuru.Mavharuvhu ose ari maviri aishandiswa asingasviki 20% kufamba, zvichiita kuti pave nekusiyana kwe 3.5% uye 8.0%, maererano.Mazhinji ehupenyu hwavo hunoshandiswa mumanyorero mode.
Mavharuvhu maviri akaenzana akaenzana eNPS 4 Fisher Control-Disk butterfly ane digital valve controller akaiswa. Iyo loop ikozvino inoshanda mune otomatiki mode ine process kushanduka kubva ku3.5% kusvika 1.6% yevharuvhu yekutanga uye 8% kusvika 3.0% yevharuvha yechipiri isina chero yakakosha loop tuning.
Kusasimba kwemvura uye kuyerera kwemvura mumagetsi ekutonhora kwesimbi yakakonzera kusagadzikana kwekupedzisira zvigadzirwa.Mapfumbamwe akaiswa maHPBV haana kukwanisa kunyatso kudzora kuyerera kwemvura sezvaidiwa.
Chigadzirwa chacho chaida kuisa mavharuvhu aizoita zviri nani kudzora maitiro uye aifanira kuderedza mari yekuisa. Chigadzirwa chacho chichapedza $ 10,000 kutsiva pombi yevhavha yega yega kuti ishanduke kubva kuHPBV kuenda kune zvikamu zvebhora. vharafu inosangana nehupamhi hwehuso nechiso hweHPBVs.
A Control-Disk valve yakaedzwa padivi-ne-parutivi neimwe yezvipfumbamwe HPBVs iripo uye yakaitwa kune zvakatarwa zvaidiwa.Chirimwa chakatsiva maHPBV masere asara mukati megore, rimwe nerimwe rine Control-Disk valve, richibvisa kudiwa. kutsiva iyo $90,000 yepombi yevharuvhu yakakamurwa yebhora, uye vharafu yebhora inodhura inosvika 25% kupfuura vharuvhu yeshavishavi.
Kudzora-Disk mavharuvhu anopa kutonga kwakaringana uye anobatsira kubvisa kushanduka kwechigadzirwa chekupedzisira.Chigayo chinofungidzira kuiswa kwemapfumbamwe ekudzora-Disk mavharuvhu achachengetedza madhora miriyoni pagore.
Zvichienzaniswa nemamwe marudzi mazhinji evharuvhu, maHPBV ane ma digital positioners ane mari yakaderera ekutanga yekuisa uye, kana akakura zvakanaka, anopa yakakwana yekudzora range.Ane hukuru hwepamusoro uye mashoma ekuyerera anorambidzwa. siyana, yakafanana neglobe kana mavharuvhu ebhora, uye inotora chete nzvimbo yeHPBV.
Pakusarudza mavharuvhu, kunyanya maHPBV, ita shuwa kuti akaenzana saizi, zvikasadaro anogona kudzorwa nemaoko nekamuri yekudzora. Zvinokoshawo kufunga nezvemaitiro evhavha, maitiro ekuzvarwa uye saizi yevharuvhu, iyo ichapa huwandu hwakakura hwekutonga. chikumbiro.
Mark Nymeyer ndiye maneja wepasi rose wekushambadzira kutaurirana weEmerson Automation Solutions, ane mutoro wekutonga traffic.
Iyi haisi paywall.Iyi imadziro emahara.Hatidi kupinda munzira yechinangwa chako pano, saka zvinongotora mashoma mashoma.
Nguva yekutumira: Jan-20-2022
