1. Chii chinonzi Gedhi Vavhavha?
Vhuru yegedhi ivharuvhu inoshandiswa KUVURA neKUDZIMA kuyerera kwemvura mupombi.Inovhura kana kuvhara vharuvhu nekusimudza gedhi kubvumira kana kudzivirira kubuda kwemvura.Inofanira kusimbiswa kuti gedhi revhavha haigoni kushandiswa pakugadzirisa kuyerera, asi yakakodzera chete kune zvikumbiro zvinoda kuyerera kwakakwana kana kuvharwa kwakakwana.
Gate Valve Standard: GB/DIN/API/ASME/GOST.
GB chiyero:
| Design | Takatarisana | Flange | Test |
| GB/T12234 | GB/T12221 | JB/T79 | JB/T9092 |
DIN chiyero:
| Design | Takatarisana | Flange | Test |
| DIN3352 | DIN3202 F4/F5 | EN1092 | EN1266.1 |
API mwero:
| Design | Takatarisana | Flange | Test |
| API 600 | ASME B16.10 | ASME B16.5 | Purogiramu inonzi 598 |
GOST chiyero:
| Design | Takatarisana | Flange | Test |
| GOST 5763-02 | GOST 3706-93. | GOST 33259-2015 | GOST 33257-15 |
2.Gate Valve Structure
Mavharuvhu egedhi anowanzo sanganisira akati wandei akakosha zvinhu:
1) Muviri wevhavha: Chinhu chinonyanya kukosha chevhavha yegedhi.Izvo zvinhu zvinowanzogadzirwa ne ductile iron, WCB, SS, nezvimwe.
2) Gedhi: control unit, inogona kunge iri rabha-yakavharwa ndiro kana yakachena simbi ndiro.
3) Valve stem: inoshandiswa kusimudza gedhi, rakagadzirwa neF6A (forged ss 420), Inconel600.
4) Bhoneti: goko riri pamusoro pemuviri wevharuvhu, iyo pamwe chete nemuviri wevharuvhu inoumba yakazara gedhi goko revhavha.
5) Chigaro chevhavha: nzvimbo yekuisa chisimbiso apo ndiro yegedhi inosangana nemuviri wevharuvhu.
3. Ndedzipi Mhando Dzakasiyana dzeMagedhi Evhavha?
Zvinoenderana neiyo valve stem chimiro chemhando, inogona kukamurwa kuita isiri-kusimuka stem gedhi vharafu uye inokwira stem gedhi vharafu.
1)Isingasimuke stem gedhi vharafu:Pamusoro pevharuvhu yevhavha yegedhi yakavanzwa haipfuuri nevhiri reruoko.Iyo ndiro yegedhi inofamba ichikwira kana pasi ichitevedza hunde yevharuvhu kuti ivhure kana kuvhara vharafu yegedhi.Chete ndiro yevharuvhu yevharuvhu yese yegedhi ine mafambiro ekuchinja.
2)Rising stem gedhi vharafu (OS&Y gedhi vharafu):Kumusoro kwehunde yegedhi regedhi rinokwira rinobuda pachena pamusoro pevhiri reruoko.Kana gedhi revhavha rakavhurwa kana kuvharwa, tsinde yevharuvhu uye ndiro yegedhi zvinosimudzwa kana kuderedzwa pamwe chete.
4. Gedhi Vavhavha Inoshanda Sei?
Kushanda kwevhavha yegedhi kuri nyore uye kunosanganisira matanho anotevera:
1) Mamiriro akazaruka: Kana gedhi regedhi riri munzvimbo yakazaruka, ndiro yegedhi inosimudzwa zvachose uye mvura inogona kuyerera zvakanaka kuburikidza negedhi remuviri wevhavha.
2) Yakavharwa mamiriro: Kana vharuvhu inoda kuvharwa, gedhi rinotamiswa pasi.Inodzvinyirirwa pamusoro pechigaro chevhavha uye inosangana nechokuvhara pamusoro pemuviri wevhavha, kudzivirira kupfuura kwemvura.
5. Chii Chinonzi Gedhi Vavhavha Inoshandiswa?
Mavharuvhu egedhi ane huwandu hwakasiyana hwekushandisa uye anogona kushandiswa mumaindasitiri akasiyana siyana uye nharaunda, senge:
1) Kugadziriswa kwemvura: Mavharuvhu akapfava egedhi anonyanya kushandiswa pakuchenesa mvura uye tsvina.
2) Indasitiri yemafuta negasi: Hard seal gedhi mavharuvhu anoshandiswa muindasitiri yemafuta uye gasi rechisikigo.
3) Chemical processing: Stainless simbi yemagedhi mavharuvhu akakodzera kudzora kuyerera kwemakemikari uye zvinosvibisa zvinwiwa mumakemikari kugadzirisa.
4) HVAC Systems: Mavharuvhu egedhi anoshandiswa mukudziya, kufefetedza uye mhepo yekumisikidza (HVAC) masisitimu.
Saka, Magedhi Mavharuvhu Anogona Kushandiswa Kurovera?
Sezvinoonekwa kubva pamusoro, mhinduro INO!Chinangwa chepakutanga chevhavha yegedhi ndechekuzarura zvakakwana uye kuvharwa zvakakwana.Kana ikashandiswa nechisimba kugadzirisa kuyerera, kuyerera kusina kururama, mhirizhonga uye zvimwe zviitiko zvichaitika, uye zvinozoita nyore nyore cavitation uye kupfeka.
6. Zvakanakira Gedhi Valve
1) Kuyerera kwakazara: Kana yakazaruka zvizere, gedhi rinenge nepamusoro pepombi, richipa kuyerera kusingabviri uye kuderera kuderera.
2)0 Kudonhedza: Kana ndiro yegedhi ikasangana nechigaro chevharuvhu, chisimbiso chakasimba chinogadzirwa kudzivirira mvura kuti isabude nevhavha.Nzvimbo dzekuvharisa dzegedhi uye chigaro chevharuvhu dzinowanzo gadzirwa nezvinhu zvakaita sesimbi kana elastic elastomer kuwana kuvhara kwemvura uye kuvharwa kwemhepo ne zero leakage.
3) Bidirectional chisimbiso: Gedhi mavharuvhu anogona kupa bidirectional chisimbiso, zvichiita kuti siyana-siyana mumapaipi ane reversible kuyerera.
4) Kugadzirisa kuri nyore: Hapana chikonzero chekubvisa gedhi regedhi zvachose.Iwe unongoda kuvhura chivharo chevhavha kuti unyatso kuburitsa chimiro chemukati chekuchengetedza.
7. Zvakaipa zveGedhi Mavharuvhu
1) Kuenzaniswa nemamwe mavharuvhu ane maumbirwo akareruka (akadai sevhavhavhavhavha), muviri wevhavha unoshandisa zvinhu zvakawanda uye mutengo wakakwira.
2) Iyo yakakura dhayamita yevhavha yegedhi inofanira kunge idiki, kazhinji DN≤1600.Iyo butterfly valve inogona kusvika kuDN3000.
3)Ivhavha yegedhi inotora nguva yakareba kuvhura nekuvhara.Kana ichida kuvhurwa nekukurumidza, inogona kushandiswa nepneumatic actuator.