Classification uye kushandiswa kwecheki mavharuvhu
Cheki vharuvhu inoreva mativi ekuvhura neanovhara evharuvhu uye anovimba nehuremu hwawo uye kudzvanywa kwemedia kugadzira chiito kuvharira kuyerera kwepakati kwevharuvhu.Cheki vharafu ivharuvhu otomatiki, inozivikanwawo secheki vharafu, imwe-nzira vharafu, isingadzoke vharuvhu kana yekuzviparadzanisa nevamwe.
Flap movement yakakamurwa kuita lift cheki vharafu uye swing cheki vharafu.Simudza cheki vharafu uye globe valve chimiro chakafanana, chete kushaikwa kwehunde yevharuvhu kutyaira iyo vharafu.Iyo yepakati kubva kune inlet side (yezasi side) inoyerera, kubva kune yekubuda side (kumusoro side) kubuda.Kana iyo inlet pressure yakakura kudarika huremu hwevhavha flap uye kuyerera kwayo kuramba uye kana vharafu yakazaruka.Sezvineiwo, vharafu inovharwa kana iyo yepakati ichiyerera kumashure.Swing cheki vharafu ine slant uye inogona kutenderera ichitenderedza axis yevhavha flap, iyo inoshanda musimboti yakafanana neyekusimudza cheki vharafu.Cheki mavharuvhu anowanzoshandiswa sevhavha yepasi pechigadzirwa chekupomba, chinogona kudzivirira kuyerera kwemvura kumashure.Cheki mavharuvhu uye mavharuvhu epasi anoshandiswa musanganiswa, anogona kutamba yakachengeteka yekuzviparadzanisa nevamwe.Izvo zvisingabatsiri ndezvekupikisa kwepamusoro uye kuvhara kusina kunaka kana kwakavharwa.
Chekutanga, lift cheki vharafu ine vertical uye yakachinjika maviri marudzi.Chimiro chemuviri wevhavha yevhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhadziswanesaiyo yeglobe valve,saka ine hukuru hwekupikiswa kwemvura.Iyo valve flap inotsvedza ichitevedza mutsetse wepakati wepakati pemuviri wevharuvhu.Kana iyo yepakati ichiyerera, chivharo chevharuvhu chinovhurwa nepakati, uye kana yepakati yamira kuyerera, vharafu inomhara pachigaro chevharuvhu nekuzvirembera.
Vertical lift cheki vharuvhu.Iyo yepakati inopinza uye yekubuda chiteshi kutungamira uye chigaro chevhavha chiteshi chegwara chakafanana, kuyerera kwekudzivirira kudiki pane yakatwasuka-kuburikidza mhando.Vertical lift cheki vharuvhu yakaiswa mu vertical pipeline.kuburikidza nekusimudza cheki vharafu inogona kuiswa chete muhorizontal pombi.Zvinodziviswa nezvinodiwa zvekuisa, zvinowanzoshandiswa mudiki dhayamita zviitiko DN <50.
Chechipiri, Swing cheki vharuvhu: Iyo dhisiki yevhavha yekutarisa inotenderera iri muchimiro chedenderedzwa uye inotenderera ichitenderedza axis yechigaro chevhavha chiteshi.Nekuda kwegwara rakakwenenzverwa mukati mevharuvhu, kuyerera kwekudzivirira kudiki pane kweiyo yekusimudza cheki valve.Iyo yakakodzera kune madiki uye epakati-saizi, yakaderera-kudzvanywa, uye yakakura-dhayamita mapaipi (yakaderera kuyerera mwero uye yakakura dhayamita mamiriro apo kuyerera hakushanduke kazhinji).Kuiswa chisimbiso hakuna kunaka semhando yekusimudza.
Swing cheki mavharuvhu akakamurwa kuva marudzi matatu: single disc, kaviri disc, uye multi disc.Aya marudzi matatu anonyanya kuiswa maererano nedhayamita yevharuvhu, kuitira kudzivirira hydraulic shock kana yepakati inomira kuyerera kana kuyerera kumashure.Single disc swing cheki mavharuvhu anowanzo kukodzera yepakati caliber application.Paunenge uchishandisa imwe disc swing check valve kune yakakura-dhayamita mapaipi, zviri nani kushandisa inononoka yekuvhara cheki vharafu inogona kuderedza nyundo yemvura kudzvinyirira kuitira kuderedza nyundo yemvura.Double disc swing cheki mavharuvhu akakodzera hombe nepakati dhayamita mapaipi.Iyo kaviri disc swing cheki vharafu ine chimiro chidiki uye uremu huremu inokurumidza kukura cheki valve;Multi disc swing cheki mavharuvhu akakodzera hombe dhayamita mapaipi.Nzvimbo yekuisa ye swing check valve haina kuganhurirwa, uye inogona kuiswa pamapaipi akatwasuka, akatwasuka, kana akarerekera.
Chechitatu, butterfly cheki vharafu: yakatwasuka-kuburikidza nemhando.Mamiriro evhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavhavha.Chimiro chayo chiri nyore, kushoma kuyerera kwekudzivirira, nyundo yemvura inomanikidza zvakare idiki.Ivhavhavhavha inotenderera ichitenderedza pini muchigaro chevharuvhu checheki valve.Disc mhando cheki vharafu ine chimiro chiri nyore, inogona kuiswa chete pahorizontal pombi, chisimbiso chakashata.
Chechina, iyo diaphragm check valve: kune zvakasiyana-siyana zvekugadzirisa mafomu, ose anoshandisa diaphragm sechikamu chekuzarura nekuvhara, nekuda kwekuita kwayo nyundo yemvura, chimiro chakareruka, mari shoma, mumakore achangopfuura kukura kwekukurumidza.Asi kushandiswa kweiyo diaphragm yekutarisa tembiricha yevharuvhu uye kudzvanywa neiyo diaphragm zvinhu zvinorambidzwa.Diaphragm cheki vharafu inokodzera kuita nyore kugadzira mvura papombi, iyo diaphragm inogona kunge yakanaka kwazvo kubvisa yepakati kupesana nekuyerera kwemvura inogadzirwa nekukanganisa, inowanzo shandiswa mune yakaderera-kumanikidza ambient tembiricha pombi, kunyanya yakakodzera mapaipi emvura, tembiricha yekushanda kwepakati mu -12 - 120 ℃ pakati pesimba rekushanda re <1.6MPa, asi diaphragm cheki valve inogona kuitwa kuti iwane calibre yakakura, iyo yepamusoro inogona kusvikwa muDN 2000mm kana zvimwe!Nekudaro, iyo diaphragm cheki valve inogona kuve yakakura caliber, DN inogona kusvika 2000mm kana kupfuura.
