Valve izinto ezimbili ezikhona okufanele kuzazwe uma kuthethwa isenzakthi?

Valve izibuyekezo ezisodwa ezimbili ezikwenzeka kuwe?

Yini ezintathu ezinhle kumele zizingcwetiwe uma kufuneka ukhethe isivakashi?

Ukuphuma kwesivikelo kumele kube kubalulekile kunenkululeko yevali futhi kube kuhambisana okusezingeni eliphezulu.

Uma kubhekwa izinkomba zokuzama, kufanele ukwenze ukuthi isici esivumelana sokuphansi okhokhelwe ngaphansi kwesivulele sikwazi ukwanelisa izidingo zomsebenzi. Uma isici esivumelana sokuphansi kungenamkhawulo, kufanele kube nokulungiswa kwesifuba esingaphansi kwesivulele sokuvula.

Kumele uthathe inqubo uma i-actuator iyatholakala ukwenza izidingo zokusebenza kweproses, ikakhulukazi i-electric actuator.

Kwesinye isikhathi, uma kufaniswe ne-actuator ye-pneumatic, izinto ezitholakala kwi-actuator ye-elekthrikhi kuyini kanye nezinhlobo zezikhwama?

Izindlela zokwenza i-Electric actuator ziyisimple kanye nezokuthutha, zinamandla amakhulu kanye nenkani enkulu. Kodwa istructure iyisimahla, ingasebenzi kahle. Izici ezincane kanye nezincane ziyalingana kakhulu kunazo zezokuphepha. Kuyadingeka kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala kulezi zindawo ezitholakala.

Izinkomba zezimoto zinamathuba amathathu okuphatha: isikhombisa esiqondile, isikhombisa esiphambili kanye ne-multi-rotary.

Kuwukuthi, kungani isiphetho sokuphansi kwesiphetho sokuphansi sokuphansi kuyisikhathi esiningi?

　　The cut-off differential pressure of the angle valve is large because the combined force of the medium on the spool or valve plate has a small torque on the rotating shaft, so it can withstand a large differential pressure.

Izinkambu zebhathela nezinkambu zebhola zingase kube izinkambu zokuhamba ezithile eziningi kakhulu.

Izinkomba zokukhetha izivalo ezifanele ukukhetha ngaphandle kwesigaba sokuphela? Ungakhetha kanjani?

Izinkomba zokuphatha ezimbi, njengamakhandlela okugcwele, izinkomba zemvume ezinkulu, kanye nezinkomba zemvume ezimbi ezifuna ukukhethwa ngokuthola isilinganiso sokuphatha.

Kunezinkinga nokuthi kufungulwa nokufiphala. Izinkomba zokufuduka zingcono ekusebenziseni, kodwa zinamandla okubi ekwenza ukucwila okungenamkhawulo nokwenza kube nomsebenzi omude. Izinkomba ezifiphala zingcono ekusebenziseni, zinamandla okubi ekwenza ukucwila okungenamkhawulo nokwenza kube nomsebenzi omude, kodwa zingcono kancane uma isidiliya sivamile kunalesi siphondo.

　　Single-seat, low-flow, and single-sealed sleeve valves are usually open and can be closed when severe washout or self-cleaning is required. Flow selection and shut-off type two-position quick-open characteristic regulating valves.

Ngaphezu kwezivalo ezinezikweletu, ezimbili, nezisiliva, kukhona izivalo ezinazo isimo sokulawula?

Izinkambu zedlame zedlame, izinkambu zebhathela, izinkambu zezinkambu (kwezinye izinkambu zezulu), izinkambu zezinkambu (nezinkambu ezikhulu zokulungisa nokulungisa) kanye nezinkambu zezinkambu zonke zinezindlela zokulungisa.

Kungani ukhetho ngokwanele kunemibala?

Kulungiselelwa nokulinganisa okusezingeni eliphezulu kanye nokukhetha. Ngoba ukulungisa kuyinto ukulungisa okuncane kwesifunda, akuyona okuyinto kuyadingeka ekuphathweni kwesifunda, kodwa kuyadingeka ekuphathweni kwemiphumela yeprosesu ekwakhiweni.

Ukukhetha kuhlanganisa okuningi okwenziwe, ukuphazamiseka okuncane kuzosiza ekukhethweni okungenakwenzeka, akuyona kuphela okwenza ukuba kuhlukene izimpilo zomsebenzi, izinto zemisebenzi kanye nokunakekela okungenakwenzeka.

Yini okushiwo ukuthi i-double seal valve ayikwazi ukusetshenziswa njengoba isivikelo sokucuthwa?

　　The advantage of double-seated spool is a force-balanced structure, allowing a large differential pressure, and its outstanding disadvantage is that the two sealing surfaces can not be contacted at the same time, resulting in a large amount of leakage.

Uma kufakwe izikhathi zokugwema ngaphandle kokwenza okuthile, isimo asikwazanga kahle, futhi uma kwenziwe izidingo eziningi (njengoba i-valve ye-sleeve engezansi), akuyona into ethandwa.

Kungani kuyisimple ukudlala uma izivalo ezimbili zisebenza ezinye izicelo ezincane?

Kwesokudla esingaphezu kwesipuni esingaphezu kwesipuni, uma isondo lisuka, ukulawula kwevalvu kungcono; uma isondo lisuka, ukulawula kwevalvu kungahambisani. Ivalvu yezimbili inesipuni esibili, isipuni esisemkhathini esikwenzile, isipuni esisemkhathini esilawulile. Ngaleyo ndlela, ekusebenzeni okuncane, isipuni esisemkhathini esilawulile kahle kakhulu kusukela ekuvimbeleni kwevalvu, okuyinto ivalvu yezimbili ayikwazi ukusebenzisa ekusebenzeni okuncane.

Izinto ezimbalwa zokwenza i-valve yokulungiswa okuyisisekelo esisodwa. Kuyini okuyinto?

Ukuphuma okuncane, ngoba kukhona kuphela i-spool valve eyodwa kungenzeka ukwenza ukuphambene. Isilinganiso se-discharge se-0.01% KV, kungaba ngezinye izakhiwo njengoba isetshenziswa njengesivikelo valve.

　　2)Allowable differential pressure is small, the thrust generated by the unbalance force is large. p of DN100 valve is only 120KPa.

3) Ukulinganisela okuncane. i-KV ye-DN100 iyisisekelo esiphakathi kuka-120.

Kuyinto enjalo ekwenzelwa kakhulu kwiindlela ezincane zokuhlanza, ezincane zokuphambene.

Izinto ezimbalwa zokwenza ukulungiswa okuphambene kwezinkambo ezimbili zokwenza ukulungiswa okuphambene? Izinto zingaphansi?

Izindlela zokulungiswa ezivumelana kakhulu, ngoba zingasebenzisi izinhlamvu eziningi zokulungiswa okungasebenzi. p for i-valve ye-DN100 iyindlela yezinkomba 280KPa.

Inkambo enkulu yokwenza. i-kV ye-DN100 iyindlela engu-160.

Ukuvuleka okukhulu ngoba amaspuli angaphezu kwokusekelwa okusha kungaba ngezikhathi eziningi. Isilinganiso somthwalo sokuhamba kwesikhathi kuyi 0.1% KV, okuyisithupha esibonakalayo kwevalvu enye yeminyango 10.

Izinkambu zokwenza izicelo zokulungisa ezithathu ezithathu zingasetshenziswa kakhulu kwezikhathi ezinamandla ezikhulayo kanye nezidingo ezifana nokuphazamisa okungaphezu kwezinyawo.

(4) Kungani ukuphumelela kokulawula okuphambili kwamathuba okuphambene kwezindlela zokulawula ezimbi, futhi ukuphumelela kokulawula okuphambili kwamathuba okuphambene kwezindlela zokulawula ezimbi?

Isipulu: Ispulu lesiphakathi sokuqala selivalvu lishayelwe ngokuphansi, futhi umzimba ushaye ngokwesokudla nokuphambili, ngakho-ke indlela yokuphatha ekhavini levalvu izoba ngokuphansi nokuphambili, ekwenzeni indlela yokuphatha yevalvu ibe yingxenye enkulu (umunwe wokubhujiswa). Ngaleyo ndlela kukhona izindawo eziningi ezimile, ezinikeza isikhala sokuthi umzimba uthinte, ekwenzeni ukucindezela ekupheleni.

I-Angle valve throttle direction iyindlela yohlobo, i-media level ngaphandle nokuphuma, kuyancintisana ukuthatha i-media enomthelela. Ngokwesibonelo, indlela yokuphuma iyisimple, isikhala sokuphuma kwemedia sinye, kanye nesidingo sokuphuma kwemedia siphansi, ngakho i-angle valve inezinkinga ezinhle zokungcola.

XII. Yini okudingeka ukusebenzisa isitshalo sesikhombisa?

ukuxhuma, isidingo sokwenza ukuphakamisa okuphelele kwesikhungo. Njengoba izinkomba zokuphatha ezinkulu, ezinyawo ezinhle kwezinkomba zokuphatha ezincane noma ezinkomba zokuphatha ezinezinto ezimbi zokuphatha;

2) Uma isicelo esilahlekile kumele sikwazi ukulungisa isidi sekuqhuba sokuphendula kwesivale. Isibonelo, isimo sokushisa, isimo somlilo, ukuchunguzwa kanye namanye amaparamitha.

3) Lapho kungekho isidingo sokuthuthukisa isilinganiso sephutha lokuphatha nokucut-off. Isici esisodwa sevalvu ye-DN 25 kanye nevalvu ezimbili zase-DN >; 100. Isimo sokuphela ekuboniseni kwesivalvu p >; 1mpa noma isimo sokuphela sokuphela P1 >. 10mpa.

Eminye imikhakha yokulungisa okanye ukusebenza kwesivulekile esivula nezivula, kubalulekile kakhulu ukushintsha ifomu lokuvula nokufunga kwamanzi.

5) Lapho kudinga ukushintsha izimo zezimpawu zekhontrola valve.

Kwesokudla, ukuqiniseka ukuthi isayizi sekhontoroli sokuphatha isikhombisa amathuba amabili?

Determine - Qmax kanye no Qmin okufakwe imithwalo yokufudumeza.

Dala futhi bala isiphakamiso esiphakamile - ngokwesimo sezenzo zomkhawulo oveza iS value, futhi bala isiphakamiso esiphakamile (uma isivalo sivulekile).

Yenza i-coefficient ye-flow - khetha i-chati noma i-software ekhethiweyo yokuhlanganisa ukuhlola amaphuzu angaphezulu kanye namaphuzu angaphezulu; ka-kV;

Ukukhetha isivalelo se-KV -: Ngokwesilinganiso somthamo ophakeme we-KV, fumanisa i-KV ethembekileyo kwi-ntengo yokuqala yezinto ezivulwe kanye futhi fumana i-kaliba yokuqala; sidlule isiZulu.

5) Uma - isicelo sokuthi Qmax, ukuvuleka kwevalvu 90%; Qmin uma ikhawuleza 10%; 6) Izinhlobo zokuhlukanisa okwenza izicelo - izinzuzo ezithile kumele zibe 10; izinzuzo > r zokwenza.

ukubhekwa kwecaliber - uma akukwazi, khetha isamba le-KV futhi bheka.

Kungenzeka ukuthi izivale ezithwala zibuyiselwe ngokuthi zibe yizivale ezithwala ezithathu noma ezimbili.

Izivale zeziklambi zathunyelwa ngo-1960 futhi zathola ukusebenzisa kakhulu ekhaya nokunye ngo-1970. Izivale zeziklambi zazinikeza isilinganiso esikhulu kwezitshalo zepetrokhemikhali ezithunyelwe ngo-1980. Ngalesikhathi, abaningi abathola ukuthi izivale zeziklambi zingathola indawo yezinkanyezi ezimbili kanye nezinkanyezi ezimbili zibe yizinto ezintsha.

Kusukela manje, lokhu akukhona. Ama-valve ase-single-seat, ase-double-seat kanye nama-sleeve valve zonke zisebenzisa ngokulinganayo. Lokhu kubonakala ngoba ama-sleeve valve akwazi ukwethula okuhambisana, ukulawula kanye nokwenza imisebenzi ngokuhamba okuhle kunama-single-seat valves, kodwa kufana nezimbalwa, ukuphepha kwesikhala kanye nezici ezifanayo nama-single- kanye nama-double-seat valves. Kungenzeka kanjani ukuthi izibuyekezele ama-single kanye nama-double seated valves? Ngakho, kufanele zisebenziswe ngokubambisana.

Isicelo sokuqinisekisa isiphetho esiphakathi kwezinyawo zomoya ezinamandla.

XV. Kungani isikhala sokuqala sesivinjelwe sivaliwe?

Kuyodinga isilwane esiphilayo: ukushintsha okukhulu kokugcina nokushintsha okuncane. Isithwala sokuqala sokuphakama kwevalvu siyophinda phezulu nophansi, uma isipaki siphusha kancane, kuyobaqiniseka ukuthi isithwala siqiniseke, kuyobaqiniseka ukuthi kuyakha isikhala esikhulu.

Kungani kufanele izivalo zokufaka zibe zizivalele kakhulu uma kufanele?

Okulungile ukuthi okuncane ukuphela kwezinyawo zeshut-off valve, okuhle kakhulu. Izinkuni zemvelo zinamaphutha angaphezulu okuncane. Ukucuthwa kuyadinga, kodwa akuyona enokwenzeka kanye nokungasebenzi kahle. Ngokwesimo esikhulu sokuncane nokuphelelwa okwenziwe, ukucuthwa kwemvelo kuyadinga kakhulu ukunciphisa ukucuthwa kwemvelo. Njengoba i-valve yokwenza okufanele, ukusebenzisa i-alloy yokwenza okunciphisa ukulondoloza, ukuphelelwa okuphezulu, okunciphisa oku-10 ~ 7, kufanele kube nokwenzeka ukuthi i-valve yokuphela. Ngakho, i-stem yevali ivumela ukuthi ibe encane kakhulu, kuhlanganise ne-coefficient encane yokunciphisa yepacking ye-PTFE njengoba yokunciphisa ukuqinisekisa ukunciphisa kwetende. Kodwa, isicelo esiphelile kuyinto ukuthi i-stem yevali encane kakhulu iyenza kube lula ukuphinda kanye nokuphila kwepacking.