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Butterfly mavharuvhu akareruka, madiki, uye akareruka kupfuura mamwe marudzi ekudzora mavharuvhu, achiaita sarudzo yakanaka yekudzora kuyerera mune akawanda maapplication. Mavharuvhu eshavishavi agara achishandiswa kuvhura otomatiki/kuvhara maapplications, uye akanyatsokodzera basa iri. Nekudaro, kana zvasvika pakugadzirisa kuyerera mune yakavharwa-loop system, mamwe mainjiniya anovaona sevasingagamuchirike.
Ivharuvhu yeshavishavi inoshandisa dhisiki rinotenderera kudzora kuyerera nemupombi. Madhisiki anogona kazhinji kuvhiyiwa kuburikidza 90 madhigirii, saka ivo dzimwe nguva vanonzi kota-kutendeuka mavharuvhu. Kazhinji, dzinoshandiswa kana uchifunga nezvehupfumi. Kana kuvhara kwakasimba kuchidikanwa, mavharuvhu eshavishavi ane zvisimbiso zvakapfava uye/kana madhisiki akavharidzirwa anogona kushandiswa kupa mashandiro anodiwa. Iyo yepamusoro inoshanda shavishavi vharafu (HPBV)-kana kaviri offset vharafu-ikozvino indasitiri mwero yeshavishavi rinodzora mavharuvhu uye rinoshandiswa zvakanyanya pakupuruzira kudzora. Ivo vanoita zvakanaka kune maapplication ane anogara achimanikidza kudonha kana kunonoka process loops.
Zvakanakira HPBV zvinosanganisira yakatwasuka-kuburikidza nekuyerera nzira, yakakwirira huwandu, uye kugona kupfuudza zviri nyore uye viscous media. Mari yavo yekuisa kazhinji ndiyo yakaderera pane ese marudzi evharuvhu, kunyanya NPS 12 uye mavharuvhu makuru. Kuenzaniswa nemamwe marudzi emavharuvhu, mutengo wavo wakanakira unowedzera zvakanyanya kana saizi inodarika masendimita gumi nemaviri.
Ivo vanogona kupa kuita kwakanaka kwekuvhara mukati mehupamhi tembiricha renji, uye inopa akasiyana mavharuvhu emuviri magadzirirwo, anosanganisira wafer mhando, lug mhando uye kaviri flange. Iwo akareruka zvakanyanya kupfuura mamwe marudzi emavharuvhu uye anowedzera compact. Semuyenzaniso, 12-inch ANSI Class 150 kaviri flange segmented ball valve inorema mapaundi 350 uye ine face-to-face dimension ye13.31 inches, nepo yakaenzana 12-inch lug butterfly valve inorema mapaundi 200 chete uye face-to- face dimension ye 3 inches.
Butterfly mavharuvhu ane zvimwe zvipimo zvinoita kuti dzisakodzere kuyerera kuyerera mune mamwe maapplication. Izvi zvinosanganisira kushomeka kudonhedza kugona zvichienzaniswa nemavharuvhu ebhora, ane cavitation yakakura kana kupenya.
Nekuti nzvimbo yakakura yedhisiki inoita sechireveredzo chekushandisa simba remhepo inoyerera kusvika kudhiraivha shaft, mavharuvhu e butterfly akajairika haawanzo shandiswa pakumanikidza kwakanyanya. Kana zvakadaro, saizi uye kusarudzwa kweiyo actuator inova yakakosha.
Dzimwe nguva zvinoitika kuti butterfly control valve yakanyanyisa, iyo ichava nemigumisiro yakaipa pakuita basa. Izvi zvinogona kunge zvakakonzerwa nekushandiswa kwemavharuvhu ane saizi yepombi, kunyanya mavharuvhu makuru eshavishavi. Inogona kuwedzera kusiyanisa kwemaitiro munzira mbiri. Chokutanga pane zvose, kuwandisa kunounza pfuma yakawandisa kune valve, uye nokudaro inoshaya kushanduka mukugadzirisa mutongi. Chechipiri, mavharuvhu akawandisa anogona kushanda kakawanda pamazariro evharuvhu ezasi, ukuwo kukweshana kwemavharuvhu eshavishavi kungave kwakakura. Nekuti kune yakapihwa valve stroke increment, vharuvhu hombe yakawandisa inoburitsa zvisingaite yakakura kuyerera shanduko. Chiitiko ichi chichawedzera zvakanyanya kusiyanisa kwemaitiro kunoenderana nenzvimbo yakafa nekuda kwekukweshana.
Makodhi-setter dzimwe nguva anoshandisa butterfly mavharuvhu nekuda kwezvikonzero zvehupfumi kana kuchinjika kune yakapihwa pombi saizi, zvisinei nezvavasingakwanisi. Pane muitiro wekuwandisa vharuvhu yeshavishavi kudzivirira kusvina pombi, izvo zvinogona kutungamirira kune hurombo hurongwa kutonga.
Iyo yakanyanya kuganhurirwa ndeyekuti iyo yakanakira throttling control range haina yakafara sevhavha yekumisa kana segmented bhora vharafu. Mavharuvhu eButterfly haawanzoita zvakanaka kunze kwekuvhura kwekutonga kweanenge 30% kusvika 50%.
Kazhinji, kana iyo loop yekudzora ichishanda nenzira yakatsetseka uye kuwana kwekuita kuri pedyo ne1, loop iri nyore kudzora. Nokudaro, nzira yekuwana 1.0 inova chinangwa chekugadzirisa zvakanaka loop, uye chiyero chinogamuchirwa chiri 0.5 kusvika 2.0 (chikamu 4: 1).
Kuita kwacho kwakanakisa kana yakawanda yeloop kuwana ichibva kune controller. Ziva kuti mune yekuwana curve yeMufananidzo 1, iyo nzira yekuwana inova yakanyanya kukwirira munharaunda iri pazasi nezve 25% yevhavha sitiroko.
Process gain inotsanangura hukama huripo pakati pe process inobuda uye shanduko yekupinda. Iyo sitiroko iyo iyo nzira yekuwana inochengetwa pakati pe0.5 uye 2.0 ndiyo yakakwana yekudzora huwandu hwevhavha. Kana iyo nzira yekuwana isiri muhuwandu hwe0.5 kusvika 2.0, hurombo husina simba hwekuita uye kusagadzikana kwechiuno kunogona kuitika.
Kana vharafu yakavharwa kuti ivhure, butterfly valve disc dhizaini ine simba rakakura pakuyerera kwevharuvhu. Iyo dhisiki ine inherent yakaenzana muzana maitiro inogona kuripa zvirinani kudonhedza kwekumanikidza kunoshanduka nechiyero chekuyerera. Yakaenzana muzana yemukati vanopa mutsara wekumisikidza maitiro kuti uchinje kudonha kwekumanikidza, izvo zvakanaka. Mhedzisiro ndiyo yakanyatsojeka imwe-kune-imwe shanduko pakati pekuyerera kweyero uye sitiroko yevharuvhu.
Munguva pfupi yapfuura, butterfly mavharuvhu anogona kushandisa discs ane inherent yakaenzana muzana kuyerera maitiro. Izvi zvinopa chimiro chekuisa chinoita kuti kuisirwa kuwedzere mukati meiyo inodiwa huwandu hwe0.5 kusvika 2.0 pamusoro pehupamhi hwekufamba. Izvi zvichavandudza zvakanyanya throttling control, kunyanya munzvimbo yakaderera yekufamba.
Magadzirirwo aya anopa kudzora kwakanaka, nekuwana kunogamuchirika kwe0.5 kusvika 2.0 kubva kunenge 11% kuvhurwa kusvika 70%, uye nharaunda yekudzora inokwirisa zvakapetwa katatu kupfuura yeyakajairika high-performance butterfly valve (HPBV) yehukuru hwakafanana. Naizvozvo, yakaenzana muzana discs inopa yakazara yakaderera maitiro akasiyana.
Butterfly mavharuvhu ane inherent akaenzana muzana maitiro, akadai control disc mavharuvhu, akanakira maitiro anoda chaiyo throttling control performance. Pasinei nekuvhiringidza kwemaitiro, vanogona kudzorwa pedyo nenzvimbo yakatarwa, nokudaro kuderedza kushanduka kwemaitiro.
Kana vharuvhu isingashande zvakanaka, ingotsiva vharafu nehukuru hwakakodzera kugadzirisa dambudziko. Semuyenzaniso, kambani yemapepa inoshandisa mavharuvhu maviri eshavishavi akakura zvakanyanya kudzora kubviswa kwemwando kubva muhuputi. Iwo mavharuvhu maviri anoshanda ari pasi pe20% yekurohwa, zvichikonzera kushanduka kwemaitiro e3.5% uye 8.0%, zvichiteerana. Yakawanda yehupenyu hwavo hwesevhisi inopedzwa mune yemanyorero maitiro.
Mavharuvhu maviri akaenzana akaenzana eNPS 4 Fisher Control-Disk butterfly ane mavharuvhu edhijitari akaiswa. Iyo loop ikozvino inoshanda mune otomatiki mode, iyo nzira yekusiyana kwevhavha yekutanga yakawedzera kubva ku3.5% kusvika 1.6%, uye kushanduka kwemaitiro evhavha yechipiri kwakawedzera kubva ku8% kusvika 3.0%, pasina chero yakakosha loop kugadziriswa.
Kusagadzikana kwemvura uye kutonga kwekuyerera kwegadziriro yekutonhora musimbi yesimbi yakakonzera kusawirirana kwechigadzirwa chekupedzisira. Iyo HPBV yakaiswa muJiutai haina kukwanisa kudzora kuyerera kwemvura sezvaidiwa.
Chimiro chinotarisira kuisa mavharuvhu anogona kudzora zvirinani maitiro uye inoda kuderedza mari yekuisa. Fekitori ichashandisa madhora zviuru gumi kutsiva mapaipi evharuvhu yega yega kuchinja kubva paHPBV kuenda kumavharuvhu ebhora akakamukana. Pane kudaro, Emerson anokurudzira kuti Control-Disk butterfly valve yayo ikwane saizi yazvino yeHPBV yakatarisana nechiso.
A Control-Disk valve yakaedzwa pamwe chete neimwe yepfumbamwe iripo HPBVs, uye kushanda kwayo kwakasangana nezvinodiwa. Fekitori yakatsiva 8 HPBV dzakasara mukati megore, uye HPBV yega yega yaive ine Control-Disk valve. Izvi zvakabvisa kukosha kwekutsiva 90,000 mapaipi emavharuvhu ebhora akakamurwa, uye mutengo wemavharuvhu ebhora wakawedzera neinosvika 25% zvichienzaniswa nemavharuvhu eshavishavi.
Kudzora-Disk mavharuvhu anopa kutonga kwakaringana uye anobatsira kubvisa kusiyanisa mune yekupedzisira chigadzirwa. Chigadzirwa chesimbi chinofungidzira kuti kuisa mavharuvhu mapfumbamwe eControl-Disk kunogona kuchengetedza mari inosvika US$1 miriyoni pagore.
Kuenzaniswa nemamwe marudzi mazhinji evharuvhu, HPBV ine dhijitari chinzvimbo ine yakaderera yekutanga kuisirwa mutengo uye inogona kupa yakaringana kutonga renji kana saizi iri kwayo. Vane huwandu hwepamusoro uye zvirambidzo zvishoma zvekuyerera. Iyo butterfly valve ine inherent yakaenzana muzana yezvikamu zvemukati inopa mukana wekuwedzera iyo control range, yakafanana neglobe valve kana bhora vharafu, uye inongotora nzvimbo yeHPBV.
Paunenge uchisarudza mavharuvhu, kunyanya HPBV, ita shuwa kuti akaenzana saizi, zvikasadaro anogona kudzorwa nemaoko nekamuri yekudzora. Izvo zvakakoshawo kufunga nezverudzi rwevharuvhu, hunhu hwemukati, uye saizi yevharuvhu inopa yakakura kwazvo kutonga renji yekushandisa.
Mark Nymeyer ndiye maneja wepasi rose wekushambadzira kufambiswa kwekuyerera kuEmerson Automation Solutions.
Iyi haisi paywall. Uyu rusvingo rwemahara. Hatidi kutadzisa chinangwa chako chekuuya pano, saka izvi zvinongotora mashoma mashoma.
Nguva yekutumira: Oct-11-2021
