Nheyo yekushanda

Kushanda kwakafanana neiyo yevhavha yebhora, iyo inobvumira kukurumidza kuvhara. Butterfly mavharuvhu anowanzo kufarirwa nekuti anodhura zvishoma pane mamwe mavharuvhu magadzirirwo, uye akareruka huremu saka anoda rubatsiro rushoma. Iyo disc yakaiswa pakati pepombi. Tsvimbo inopfuura nepa disc ichienda kune actuator iri kunze kwevharuvhu. Kutenderedza actuator inoshandura dhisiki ringaite parallel kana perpendicular kuyerera. Kusiyana nevhavha yebhora, disc inogara iripo mukati mekuyerera, saka inokonzera kudonhedzwa kwekumanikidzwa, kunyange kana yakazaruka.

A butterfly valve inobva kumhuri yemavharuvhu inonziquarter-turn valves. Mukushanda, vharuvhu yakazaruka kana yakavharwa kana dhisiki ichitenderedzwa kota. “Butterfly” idhisiki resimbi rakaiswa patsvimbo. Kana vharuvhu yakavharwa, disc inoshandurwa kuitira kuti ivhare zvachose kubva panzira. Kana vharuvhu yakazaruka zvizere, dhisiki inotenderedzwa kota kutendeuka kuitira kuti inobvumira nzira inenge isina kuganhurirwa yemvura. Ivhavha inogonawo kuvhurwa zvishoma nezvishoma kuti iite throttle flow.

Kune marudzi akasiyana eshavishavi mavharuvhu, rimwe nerimwe rakachinjirwa kumanikidziro akasiyana uye kushandiswa kwakasiyana. Zero-offset butterfly valve, iyo inoshandisa kuchinjika kwerabha, ine yakaderera chiyero chekumanikidza. Iyo yepamusoro-inoshanda kaviri yekubvisa butterfly valve, inoshandiswa mune zvishoma-inodzvinyirira masisitimu, inobviswa kubva pakati pemutsara wedhisiki chigaro uye chisimbiso chemuviri (offset one), uye mutsara wepakati webore (offset maviri). Izvi zvinogadzira cam chiitiko panguva yekushanda kusimudza chigaro kunze kwechisimbiso zvichikonzera kukweshana kushoma pane inogadzirwa mu zero offset dhizaini uye inoderedza maitiro ayo ekupfeka. Ivharuvhu inonyatsokodzera masisitimu e-high-pressure ndiyo katatu offset butterfly valve. Muvharuvhu iyi disc seat yekubata axis inomiswa, iyo inoita kuti ibvise kutsvedza kusangana pakati pe disc nechigaro. Kana iri katatu offset mavharuvhu chigaro chinogadzirwa nesimbi kuitira kuti inogona kugadzirwa zvakadai sekuwana bubble tight shut-off paunosangana ne disc.

Types

1. Concentric butterfly valves - rudzi urwu rwevhavha ine resilient rubber chair ine simbi disc.
2. Doubly-eccentric butterfly valves (yakakwirira-inoshanda butterfly mavharuvhu kana maviri-offset butterfly mavharuvhu) - mhando dzakasiyana dzezvinhu zvinoshandiswa chigaro uye disc.
3. Triply-eccentric butterfly mavharuvhu (katatu-offset butterfly mavharuvhu) - zvigaro zvine laminated kana yakasimba simbi chigaro dhizaini.

Wafer-style butterfly valve

Iyo wafer style butterfly valve yakagadzirirwa kuchengetedza chisimbiso chinopesana ne-bi-directional kudzvanywa kusiyanisa kudzivirira chero backflow mumasisitimu akagadzirirwa unidirectional kuyerera. Inoita izvi nechisimbiso chakanyatsokodzera; kureva, gasket, o-ring, precision machined, uye chiso chevharuvhu rakati sandarara kumativi ekumusoro nekudzika kwevharuvhu.

Lug-style butterfly valve

Lug-style mavharuvhu ane shinda inoiswa pamativi ese emuviri wevharuvhu. Izvi zvinovatendera kuti vaiswe muhurongwa vachishandisa seti mbiri dzemabhaudhi uye pasina nzungu. Ivhavha inoiswa pakati pemaflange maviri uchishandisa seti yakasiyana yemabhoti kune imwe neimwe flange. Iyi setup inobvumira chero divi repombi system kuti ribviswe pasina kukanganisa rimwe divi.

A lug-style butterfly valve inoshandiswa mukufa kwekupedzisira sevhisi kazhinji ine yakaderedzwa chiyero chekumanikidza. Semuyenzaniso, rovaruvhu yeshavishavi yakaiswa pakati pemaflange maviri ine 1,000 kPa (150psi) pressure rating. Ivhavha imwechete yakasimudzwa neflange imwe, mubasa rekupedzisira, ine 520 kPa (75 psi) chiyero. Mavharuvhu ane lugged anoshingirira zvakanyanya kumakemikari uye zvinonyungudutsa uye anogona kubata tembiricha inosvika 200 °C, izvo zvinoita kuti ive mhinduro inogoneka.

Rotary valve

Mavharuvhu anotenderera anoumba mavharuvhu ehuvhavha uye anoshandiswa kunyanya mumaindasitiri ehupfu. Panzvimbo pokuti sandara, shavishavi rine homwe. Kana yakavharwa, inoita chaizvo sevhavhavhavha uye yakasimba. Asi kana iri mukutenderera, homwe dzinobvumira kudonhedza huwandu hwakatsanangurwa hwezvakaoma, izvo zvinoita kuti vharafu ive yakakodzera dosing yakawanda chigadzirwa negiravhiti. Mavharuvhu akadaro kazhinji ane saizi diki (isingasviki 300 mm), pneumatically activated uye inotenderera 180 madhigirii kumashure nekudzoka.

Shandisa muindasitiri

Mumishonga yemishonga, makemikari, uye maindasitiri ezvokudya, butterfly valve inoshandiswa kukanganisa kuyerera kwechigadzirwa (chakasimba, mvura, gasi) mukati mekugadzirisa.Mavharuvhu anoshandiswa mumakambani aya anowanzogadzirwa maererano neCGMP mazano (ikozvino maitiro akanaka ekugadzira). Mavharuvhu eshavishavi aiwanzotsiva mavharuvhu ebhora mumaindasitiri mazhinji, kunyanya epetroleum, nekuda kwekudhura uye nyore kuisa, asi mapaipi ane mavharuvhu eshavishavi haakwanisi ku“putirwa” pakuchenesa.

Nhoroondo

Shavishavivharuvhu yave kushandiswa kubva mukupera kwezana ramakore rechi 18. James Watt akashandisa shavishavi vharuvhu mune yake injini prototypes. Nekufambira mberi mukugadzira zvinhu uye tekinoroji, mavharuvhu eshavishavi anogona kuitwa madiki uye anoshingirira tembiricha yakanyanyisa. Mushure meHondo Yenyika II, marabha ekugadzira akashandiswa munhengo dzechisimbiso, achibvumira vhavhavhavhavha kuti ishandiswe mune mamwe maindasitiri. Muna 1969 James E. Hemphill akapa patent yekuvandudza kuvharuvhu yeshavishavi, ichideredza torque yehydrodynamic inodiwa kushandura kubuda kwevharuvhu.