1 Lintlha tsa bohlokoa tsa khetho ea li-valve

1.1 Hlakisa sepheo sa valve sesebelisoa kapa sesebelisoa

Etsa qeto ea maemo a sebetsang a valve: mofuta oa sebaka se sebetsang, khatello ea ho sebetsa, mocheso oa ho sebetsa le mokhoa oa ho laola ts'ebetso, joalo-joalo;

1.2 Khetha ka nepo mofuta oa valve

Khetho e nepahetseng ea mofuta oa li-valve e ipapisitse le kutloisiso e felletseng ea moqapi mabapi le ts'ebetso eohle ea tlhahiso le maemo a ts'ebetso. Ha u khetha mofuta oa valve, moqapi o lokela ho qala ka ho tseba litšobotsi tsa sebopeho le ts'ebetso ea valve ka 'ngoe;

1.3 Etsa qeto ea ho hokahanya ha valve

Har'a khokahanyo ea khoele, khokahanyo ea flange le khokahanyo ea ho qetela ea welding, tse peli tsa pele li sebelisoa haholo. Li-valve tse nang le likhoele ke li-valve tse nang le bophara bo ka tlase ho 50mm. Haeba boholo ba bophara bo le boholo haholo, ho kenya le ho tiisa khokahano ho thata haholo. Li-valve tse amanang le flange li bonolo ho kenya le ho qhaqha, empa li boima ebile li theko e boima ho feta li-valve tse nang le likhoele, kahoo li loketse ho hokahanya liphaephe tsa li-diameter tse fapaneng le likhatello. Lihokelo tsa welding li loketse maemo a boima bo boima 'me li tšepahala ho feta likhokahano tsa flange. Leha ho le joalo, ho thata ho qhaqha le ho tsosolosa li-valve tse kopantsoeng ke welding, kahoo tšebeliso ea eona e lekanyelitsoe ho linako tseo hangata li ka sebetsang ka botšepehi ka nako e telele, kapa maemo a tšebeliso a thata le mocheso o phahameng;

1.4 Khetho ea lisebelisoa tsa valve

Ntle le ho nahana ka thepa ea 'mele (mocheso, khatello) le thepa ea lik'hemik'hale (ho bola) ea sebaka se sebetsang, bohloeki ba seaplane (hore na ho na le likaroloana tse tiileng) bo lokela ho ba hantle ha ho khethoa lisebelisoa tsa khetla ea valve, likarolo tse ka hare le tse ling. ho tiisa bokahodimo. Ho feta moo, melaoana e amehang ea mmuso le lefapha la basebelisi e lokela ho fetisetsoa ho eona. Khetho e nepahetseng le e utloahalang ea lisebelisoa tsa li-valve e ka fumana bophelo ba tšebeletso ea moruo ka ho fetisisa le ts'ebetso e ntle ka ho fetisisa ea valve. Taelo ea khetho ea lisebelisoa tsa 'mele oa li-valve ke: tšepe e entsoeng ka tšepe-carbon steel-stainless steel, le taelo ea khetho ea lisebelisoa tsa ho tiisa ke: tšepe ea rabara-copper-alloy-F4;

1.5 Tse ling

Ho phaella moo, lebelo la ho phalla le khatello ea mokelikeli o phallang ka valve e lokela ho khethoa, 'me valve e loketseng e lokela ho khethoa ho sebelisoa boitsebiso bo teng (joaloka likhalase tsa lihlahisoa tsa li-valve, mehlala ea lihlahisoa tsa li-valve, joalo-joalo).

2 Selelekela ho Li-valve tse Tloaelehileng

Ho na le mefuta e mengata ea li-valve, 'me mefuta e mengata e rarahane. Mefuta e meholo keli-valve tsa heke, li-valve tsa ho emisa, li-valve tsa throttle,li-valve tsa serurubele, li-valve tsa plug, li-valve tsa bolo, li-valve tsa motlakase, li-diaphragm, li-check valves, li-valve tsa tšireletso, li-valve tse fokotsang khatello,maraba a mouoane le li-valve tsa ho koala ha tšohanyetso,har'a tsona tse sebelisoang ka tloaelo ke li-valve tsa heke, li-stop valves, li-throttle valves, li-plug, li-butterfly valves, li-ball valves, li-check valves le diaphragm.

2.1 Belofo ea Heke

Belofo ea heke ke belofo eo 'mele oa eona oa ho bula le ho koala (poleiti ea valve) o khannoang ke kutu ea valve' me e ea holimo le tlaase ho ea holimo le holim'a sebaka se koalang sa setulo sa valve, se ka kopanyang kapa sa khaola tselana ea mokelikeli. Ha ho bapisoa le valve ea ho emisa, valve ea heke e na le ts'ebetso e ntlafetseng ea ho tiisa, ho hanyetsa metsi a fokolang, boiteko bo fokolang ba ho bula le ho koala, 'me e na le ts'ebetso e itseng ea phetoho. Ke e 'ngoe ea li-valve tsa ho koala tse sebelisoang haholo. Mefokolo ke boholo bo boholo, mohaho o rarahaneng ho feta valve ea ho emisa, ho apara habonolo ha sebaka sa ho tiisa, le tlhokomelo e thata. Ka kakaretso ha e loketse ho thothomela. Ho ea ka boemo ba khoele holim'a kutu ea valve ea heke, e ka aroloa ka mefuta e 'meli: mofuta oa stem e ntseng e phahama le mofuta o patiloeng. Ho ea ka litšobotsi tsa sebopeho sa poleiti ea heke, e ka aroloa ka mefuta e 'meli: mofuta oa wedge le mofuta o tšoanang.

2.2 Belofo ea ho emisa

Sesepa sa ho emisa ke sephahla se koalang se theohelang, moo likarolo tse bulang le tse koalang (disk ea valve) li khannoang ke kutu ea valve ho ea holimo le tlase ho latela axis ea setulo sa valve (sealing surface). Ha e bapisoa le valve ea heke, e na le ts'ebetso e ntle ea phetoho, ts'ebetso e fokolang ea ho tiisa, sebopeho se bonolo, tlhahiso e bonolo le tlhokomelo, ho hanyetsa metsi a mangata, le theko e tlaase. Ke valve e atisang ho sebelisoa, e atisang ho sebelisoa bakeng sa liphaephe tse mahareng le tse nyenyane tsa bophara.

2.3 valve ea bolo

Likarolo tse bulang le tse koalang tsa belofo ea bolo ke lilika-likoe tse nang le selikalikoe ka masoba, 'me selikalikoe se potoloha ka kutu ea valve ho hlokomela ho bula le ho koala ha valve. Valve ea bolo e na le sebopeho se bonolo, ho fetoha ka potlako, ts'ebetso e bonolo, boholo bo nyane, boima bo bobebe, likarolo tse fokolang, ho hanyetsa mokelikeli o monyenyane, ho tiisa hantle, le tlhokomelo e bonolo.

2.4 Sephahla sa throttle

Ntle le diski ea valve, valve ea throttle e na le sebopeho se tšoanang le se emisang. Sesepa sa eona sa valve ke karolo ea throttling, 'me libopeho tse fapaneng li na le litšobotsi tse fapaneng. Bophara ba setulo sa valve ha boa lokela ho ba boholo haholo, hobane bophahamo ba eona ba ho bula bo nyane mme sekhahla sa phallo e mahareng se eketseha, ka hona se potlakisa ho khoholeha ha diski ea valve. The valve throttle e na le litekanyo tse nyane, boima bo bobebe, le ts'ebetso e ntle ea tokiso, empa ho nepahala ha phetoho ha ho holimo.

2.5 valve ea plug

Belofo ea plug e sebelisa 'mele oa plug o nang le lesoba ha karolo e bulang le e koalang,' me 'mele oa plug o potoloha le kutu ho fihlela ho bula le ho koala. Valve ea plug e na le sebopeho se bonolo, ho bula le ho koala ka potlako, ts'ebetso e bonolo, ho hanyetsa mokelikeli o monyenyane, likarolo tse fokolang, le boima bo bobebe. Li-valve tsa plug li fumaneha ka mefuta e otlolohileng, ea litsela tse tharo le tse 'nè. Li-valve tsa plug tse otlolohileng li sebelisoa ho khaola bohareng, 'me li-valve tsa plug tse litsela tse tharo le tse 'nè li sebelisoa ho fetola tsela ea bohareng kapa ho khelosa bohareng.

2.6 Butterfly valve

Belofo ea serurubele ke poleiti ea serurubele e potolohang 90 ° ho potoloha axis e tsitsitseng 'meleng oa valve ho phethela mosebetsi oa ho bula le ho koala. Belofo ea serurubele e nyane ka boholo, boima bo bobebe, sebopeho se bonolo, 'me e na le likarolo tse seng kae feela.

'Me e ka buloa ka potlako le ho koaloa ka ho potoloha 90 °,' me ho bonolo ho e sebetsa. Ha valve ea serurubele e le boemong bo bulehileng ka ho feletseng, botenya ba poleiti ea serurubele ke eona feela khanyetso ha sehare se phalla 'meleng oa valve. Ka hona, khatello ea khatello e hlahisoang ke valve e nyenyane haholo, kahoo e na le litšobotsi tse ntle tsa ho laola phallo. Li-valve tsa butterfly li arotsoe ka mefuta e 'meli ea ho tiisa: elastic soft seal le metal hard seal. Bakeng sa li-valve tsa elastic seal, selikalikoe se koalang se ka kenngoa 'meleng oa li-valve kapa sa hokelloa karolong e ka thōko ea poleiti ea serurubele. E na le ts'ebetso e ntle ea ho tiisa 'me e ka sebelisoa bakeng sa ho thothomela, hammoho le liphaephe tsa vacuum tse mahareng le mecha ea litaba e senyang. Li-valve tse nang le litiiso tsa tšepe hangata li na le bophelo bo bolelele ba ts'ebeletso ho feta li-valve tse nang le litiiso tse rekerehang, empa ho thata ho fumana tiiso e felletseng. Hangata li sebelisoa maemong ao phallo le khatello ea khatello li fapaneng haholo 'me ho hlokahala ts'ebetso e ntle ea throttling. Litiiso tsa tšepe li ka ikamahanya le mocheso o phahameng oa ts'ebetso, ha litiiso tse elastic li na le bothata ba ho lekanyetsoa ke mocheso.

2.7 Ho hlahloba valve

Cheke valve ke valve e ka thibelang metsi ho khutlela morao. The valve disc ea valve ea ho hlahloba e bula tlas'a ketso ea khatello ea mokelikeli, 'me mokelikeli o phalla ho tloha ka lehlakoreng le kenang ho ea lehlakoreng la ho tsoa. Ha khatello e ka lehlakoreng le kenang e le tlase ho feta lehlakoreng la ho tsoa, ​​​​disk ea valve e koala ka boeona tlas'a ketso ea lintlha tse kang phapang ea khatello ea metsi le matla a eona a khoheli ho thibela ho khutla ha metsi. Ho ea ka sebopeho sa sebopeho, e arotsoe ka valve ea ho lekola le ea swing check valve. The lift check valve e na le tiiso e betere ho feta ea swing check valve le khanyetso e kholo ea mokelikeli. Bakeng sa boema-kepe ba ho huloa ha pompo ea ho hula pompo, valve ea leoto e lokela ho khethoa. Mosebetsi oa eona ke: ho tlatsa pompo e kenang pompo ka metsi pele o qala pompo; ho boloka phala e kenang le pompo ea 'mele o tletse metsi ka mor'a ho emisa pompo ho itokisetsa ho qala bocha. Hangata valve ea leoto e kenngoa feela holim'a phala e emeng sebakeng sa pompo, 'me sehare se phalla ho tloha tlase ho ea holimo.

2.8 valve ea diaphragm

Karolo e bulang le e koalang ea valve ea diaphragm ke diaphragm ea rabara, e pakeng tsa 'mele oa valve le sekoahelo sa valve.

Karolo e hlahelletseng ea diaphragm e tsitsitsoe holim'a kutu ea valve, 'me setopo sa valve se kenngoa ka rabara. Kaha sehare ha se kene ka hare ho sekoahelo sa valve, kutu ea valve ha e hloke lebokose la ho kenya lintho. Valve ea diaphragm e na le sebopeho se bonolo, ts'ebetso e ntle ea ho tiisa, tlhokomelo e bonolo, le ho hanyetsa metsi a tlase. Li-valve tsa diaphragm li arotsoe ka mofuta oa weir, mofuta o otlolohileng, mofuta oa lehlakoreng le letona le mofuta oa hona joale o tobileng.

3 Litaelo tse tloaelehileng tsa khetho ea li-valve

3.1 Litaelo tsa khetho ea li-valve tsa heke

Ka kakaretso, li-valve tsa heke li lokela ho khethoa pele. Ho phaella ho mouoane, oli le mecha e meng ea litaba, li-valve tsa liheke li boetse li loketse mecha ea litaba e nang le li-granular solids le viscosity e phahameng, 'me e loketse li-valve bakeng sa li-venting le tsamaiso e tlaase ea vacuum. Bakeng sa mecha ea litaba e nang le likaroloana tse tiileng, 'mele oa valve ea heke o lokela ho ba le lesoba le le leng kapa tse peli tsa ho hloekisa. Bakeng sa mecha ea litaba ea mocheso o tlase, ho lokela ho khethoa valve ea heke e khethehileng ea mocheso o tlase.

3.2 Litaelo tsa khetho ea valve ea ho emisa

Sesepa sa ho emisa se loketse liphaephe tse nang le litlhoko tse tlaase bakeng sa ho hanyetsa mokelikeli, ke hore, tahlehelo ea khatello ha e nkoe e ngata, hammoho le liphaephe kapa lisebelisoa tse nang le mocheso o phahameng le oa khatello ea maikutlo. E loketse liphaephe tsa mouoane le tse ling tsa mecha ea litaba tse nang le DN <200mm; li-valve tse nyenyane li ka sebelisa li-valve tsa ho emisa, tse kang li-valve tsa nale, li-valve tsa lisebelisoa, li-valve tsa sampling, li-valve gauge gauge, joalo-joalo; li-valve tsa ho emisa li na le taolo ea phallo kapa taolo ea khatello, empa ho nepahala ha taolo ha ho phahame, 'me bophara ba liphaephe bo batla bo le nyane, kahoo li-valve tsa ho emisa kapa li-valve tsa throttle li lokela ho khethoa; bakeng sa mecha ea litaba e chefo haholo, ho lokela ho khethoa li-valve tsa ho emisa tse tiisitsoeng ka bellows; empa li-valve tsa ho emisa ha lia lokela ho sebelisoa bakeng sa mecha ea phatlalatso e nang le viscosity e phahameng le mecha ea litaba e nang le likaroloana tse bonolo ho phalla, leha e le hore ha ea lokela ho sebelisoa e le li-valve le li-valve bakeng sa lisebelisoa tse tlaase tsa vacuum.

3.3 Litaelo tsa khetho ea valve ea bolo

Li-valve tsa bolo li loketse mecha ea litaba ea mocheso o tlase, khatello e phahameng le e phahameng ea viscosity. Li-valve tse ngata tsa bolo li ka sebelisoa mecheng ea litaba tse nang le likaroloana tse tiileng tse emisitsoeng, hape li ka sebelisoa bakeng sa mecha ea litaba ea phofshoana le ea granular ho latela litlhoko tsa thepa ea tiiso; li-valve tsa bolo ea li-channel ha li tšoanelehe bakeng sa taolo ea phallo, empa li loketse liketsahalo tse hlokang ho bula le ho koaloa ka potlako, e leng ho loketseng bakeng sa ho khaoloa ha tšohanyetso likotsing; li-valve tsa bolo hangata li khothaletsoa bakeng sa liphaephe tse nang le ts'ebetso e tiileng ea ho tiisa, ho roala, liteishene tse honyehang, ho bula le ho koala ka potlako, ho khaoha ha khatello e phahameng (phapang e kholo ea khatello), lerata le tlase, ts'ebetso ea gasification, torque e nyane ea ts'ebetso, le ho hanyetsa mokelikeli o monyane; li-valve tsa bolo li loketse meaho e bobebe, ho fokotsa khatello e tlase, le mecha ea phatlalatso e senyang; li-valve tsa bolo le tsona ke li-valve tse loketseng ka ho fetisisa bakeng sa mecha ea litaba ea mocheso o tlase le e batang haholo. Bakeng sa lits'ebetso tsa liphaephe le lisebelisoa tsa mecha ea litaba ea mocheso o tlase, li-valve tsa bolo ea mocheso o tlase tse nang le likoahelo tsa li-valve li lokela ho khethoa; ha u sebelisa li-valve tsa bolo e phaphametseng, lisebelisoa tsa setulo sa valve li lokela ho jara mojaro oa bolo le sebaka se sebetsang. Li-valve tsa bolo ea bophara bo boholo li hloka matla a maholo nakong ea ts'ebetso, 'me li-valve tsa bolo ea DN≥200mm li lokela ho sebelisa phetiso ea lisebelisoa tsa seboko; li-valve tsa bolo tse tsitsitseng li loketse liketsahalo tse nang le li-diameter tse kholoanyane le likhatello tse phahameng; ho phaella moo, li-valve tsa bolo tse sebelisetsoang liphaephe tsa lisebelisoa tsa ts'ebetso tse chefo haholo le mecha ea litaba e tukang e lokela ho ba le mehaho e thibelang mollo le e khahlanong le static.

3.4 Litaelo tsa Khetho bakeng sa Valve ea Throttle

Li-valve tsa throttle li loketse liketsahalo tse nang le mocheso o tlase o tlase le khatello e phahameng, 'me li loketse likarolo tse hlokang ho fetola phallo le khatello. Ha li tšoanelehe bakeng sa mecha ea litaba e nang le viscosity e phahameng le e nang le likaroloana tse tiileng, 'me ha li tšoanelehe bakeng sa li-valve tsa ho itšehla thajana.

3.5 Litaelo tsa Khetho bakeng sa Plug Valve

Li-valve tsa plug li loketse liketsahalo tse hlokang ho buloa le ho koaloa kapele. Ka kakaretso ha lia lokela mecha ea litaba ea mouoane le mocheso o phahameng. Li sebelisoa bakeng sa mecha ea litaba e nang le mocheso o tlase le viscosity e phahameng, hape e loketse mecha ea litaba e nang le likaroloana tse emisitsoeng.

3.6 Litaelo tsa Khetho bakeng sa Valofo ea Butterfly

Li-valve tsa serurubele li loketse liketsahalo tse nang le bophara bo boholo (joalo ka DN﹥600mm) le litlhoko tse khutšoane tsa bolelele ba sebopeho, hammoho le linako tse hlokang taolo ea phallo le ho bula le ho koala kapele. Ka kakaretso li sebelisoa bakeng sa mecha ea litaba e kang metsi, oli le moea o hatelitsoeng ka mocheso ≤80℃ le likhatello ≤1.0MPa; kaha li-valve tsa serurubele li na le tahlehelo e batlang e le khōlō ea khatello ha e bapisoa le li-valve tsa heke le li-valve tsa bolo, li-valve tsa serurubele li loketse tsamaiso ea liphaephe tse nang le litlhoko tsa tahlehelo ea khatello ea lax.

3.7 Litaelo tsa Khetho bakeng sa Cheka Valofo

Li-valve tsa ho hlahloba ka kakaretso li loketse mecha ea litaba e hloekileng, 'me ha lia lokela mecha ea litaba e nang le likaroloana tse tiileng le viscosity e phahameng. Ha DN≤40mm, ho eletsoa ho sebelisa valve e phahamisang (e lumelloa feela ho kenngoa liphaepheng tse otlolohileng); ha DN＝50～400mm, ho eletsoa hore u sebelise sephahla sa ho hlahlobisisa swing (e ka kenngoa liphaepheng tse peli tse tšekaletseng le tse otlolohileng. Haeba e kentsoe phala e otlolohileng, tataiso ea phallo e bohareng e lokela ho ba ho tloha tlase ho ea holimo); ha DN≥450mm, ho eletsoa hore u sebelise valve ea ho hlahloba buffer; ha DN＝100～400mm, valve ea ho hlahloba liphaephe le eona e ka sebelisoa; valve ea swing check valve e ka etsoa khatello e phahameng haholo ea ho sebetsa, PN e ka fihla ho 42MPa, 'me e ka sebelisoa sebakeng leha e le sefe sa ho sebetsa le mocheso ofe kapa ofe oa mocheso o sebetsang ho latela lisebelisoa tse fapaneng tsa khetla le litiiso. Mocheso o bohareng ke metsi, mouoane, khase, sebaka se senyang, oli, meriana, joalo-joalo. Mocheso o mahareng o sebetsang o pakeng tsa -196～800℃.

3.8 Litaelo tsa khetho ea valve ea diaphragm

Li-valve tsa diaphragm li loketse oli, metsi, mecha ea litaba ea asiti le mecha ea litaba e nang le taba e emisitsoeng e nang le mocheso o sebetsang o ka tlase ho 200 ℃ le khatello e ka tlase ho 1.0MPa, empa eseng bakeng sa lihlapolli tsa manyolo le li-oxidants tse matla. Li-valve tsa diaphragm tsa mofuta oa Weir li loketse mecha ea litaba ea abrasive granular. Tafole ea sebopeho sa phallo e lokela ho sebelisoa bakeng sa khetho ea li-valve tsa diaphragm tsa mofuta oa weir. Li-valve tsa diaphragm tse otlolohileng li loketse mokelikeli oa viscous, li-slurries tsa samente le mecha ea litaba ea sedimentary. Ntle le litlhoko tse khethehileng, li-valve tsa diaphragm ha lia lokela ho sebelisoa liphaepheng tsa vacuum le lisebelisoa tsa vacuum.