Amanqaku aphambili okukhetha ivalve
1. Cacisa injongo yesivalo kwisixhobo okanye isixhobo
Qinisekisa iimeko zokusebenza zevalve: ubunjani bendawo esebenzayo, uxinzelelo lokusebenza, ukushisa okusebenzayo kunye nendlela yokulawula yokusebenza, njl.
2. Khetha ngokuchanekileyo uhlobo lwevalve
Ukhetho oluchanekileyo lohlobo lwevalvu lusekwe kwingqinisiso epheleleyo yomyili wayo yonke inkqubo yokuvelisa kunye neemeko zokusebenza njengento efunekayo kuqala. Xa ukhetha uhlobo lwevalve, umyili kufuneka aqale abambe iimpawu zesakhiwo kunye nokusebenza kwevalve nganye.
3. Ukugqiba ukudibanisa kwevalve
Phakathi kwemidibaniso edityanisiweyo, imidibaniso yeflange, kunye noqhagamshelo oludityanisiweyo lwesiphelo, ezimbini zokuqala zezona zisetyenziswa kakhulu. Iivalvu ezinemisonto ubukhulu becala ziivalvu ezinomlinganiselo ongaphantsi kwama-50mm. Ukuba ububanzi bukhulu kakhulu, kuya kuba nzima kakhulu ukufaka kunye nokutywina uxhumano.
Iivalve ezidityaniswe nge-flange zilula ukuzifaka kunye nokuqhaqha, kodwa zinzima kwaye zibiza ngaphezu kwee-valve ezixhunyiwe kwi-screw, ngoko ke zifanelekile ukudibaniswa kwemibhobho yobubanzi obuhlukeneyo kunye noxinzelelo.
Uxhulumaniso lwe-Welding lufanelekile kwiimeko zomthwalo onzima kwaye luthembeke ngakumbi kunoxhumo lwe-flange. Nangona kunjalo, kunzima ukuqhaqha kunye nokubuyisela i-valve edibeneyo nge-welding, ngoko ke ukusetyenziswa kwayo kunqunyelwe kwiimeko ezinokuthi zisebenze ngokuthembekileyo ixesha elide, okanye apho iimeko zokusetyenziswa zinzima kwaye ukushisa kuphezulu.
4. Ukukhethwa kwezinto zevalvu
Xa ukhetha izinto zegobolondo ye-valve, iindawo zangaphakathi kunye nokutywinwa kwendawo, ngaphezu kokuqwalasela iimpawu ezibonakalayo (ubushushu, uxinzelelo) kunye neempawu zeekhemikhali (ukonakala) kwendawo yokusebenza, ukucoceka kwendawo ephakathi (kunye okanye ngaphandle kwamaqhekeza aqinileyo) kufuneka nayo ibanjwe. Ukongezelela, kuyimfuneko ukubhekisela kwimimiselo efanelekileyo yelizwe kunye nesebe labasebenzisi.
Ukhetho oluchanekileyo kunye nolunengqiqo lwesixhobo se-valve lunokufumana ubomi benkonzo yezoqoqosho kakhulu kunye nokusebenza kakuhle kwevalve. Uluhlu lwezinto ezikhethiweyo zevalve yomzimba yile: intsimbi yentsimbi-yekhabhoni yentsimbi, kunye neseyingi yokutywina ulandelelwano lokukhetha izinto: irabha-yobhedu-alloy steel-F4.
5. Okunye
Ukongezelela, izinga lokuhamba kunye nenqanaba loxinzelelo lwe-fluid ehamba nge-valve kufuneka igqitywe, kwaye i-valve efanelekileyo kufuneka ikhethwe ngokusebenzisa ulwazi olukhoyo (njengeekhathalogu zeemveliso zevalve, iisampuli zemveliso yevalve, njl.).
Imiyalelo yokukhetha ivalvu esetyenziswa ngokuqhelekileyo
1:Imiyalelo yokhetho lwevalvu yesango
Ngokubanzi, iivalve zesango kufuneka zibe lukhetho lokuqala. Ukongeza kokufanelekileyo kwi-steam, i-oyile kunye neminye imithombo yeendaba, iivalve zesango nazo zifanelekile kumajelo aqulethe i-granular solids kunye ne-viscosity ephezulu, kwaye ifanelekile kwii-valve kwiinkqubo zokukhupha kunye ne-vacuum ephantsi. Kwimidiya enamasuntswana aqinileyo, umzimba wevalve wevalve yesango kufuneka ube nomngxuma omnye okanye emibini yokucoca. Kwimithombo yeendaba ephantsi, kufuneka kusetyenziswe iivalvu ezikhethekileyo zesango eliphantsi lobushushu obuphantsi.
2:Umyalelo wokukhethwa kwevalve yeglowubhu
Ivalve yokumisa ifanelekile kwimibhobho engadingi ukuxhathisa okungqongqo kolwelo, oko kukuthi, imibhobho okanye izixhobo ezinobushushu obuphezulu kunye noxinzelelo oluphezulu oluphakathi ezingathatheli ngqalelo ilahleko yoxinzelelo, kwaye zilungele imibhobho ephakathi efana nomphunga one-DN<200mm;
Iivalve ezincinci zinokukhetha iivalvu zeglowubhu, ezinjengeevalve yenaliti, iivalve zesixhobo, iivalve zesampulu, iivalvu zegeyiji yoxinzelelo, njl.;
I-valve yokumisa inokulungiswa kokuhamba okanye ukulungiswa koxinzelelo, kodwa ukuchaneka kohlengahlengiso aluphezulu, kwaye ububanzi bombhobho buncinci, kungcono ukusebenzisa i-valve yokumisa okanye i-valve throttle;
Kwimithombo yeendaba enetyhefu kakhulu, ivalve yeglowubhu evaliweyo kufuneka isetyenziswe; nangona kunjalo, ivalve yeglowubhu mayingasetyenziselwa imidiya eneviscosity ephezulu kunye nemidiya equlathe amasuntswana ekulula ukuwa, kwaye akufunekanga isetyenziswe njengevalve yokuphuma okanye ivacuum system valve.
3:Imiyalelo yokukhetha ivalve yebhola
Ivalve yebhola ifanelekile kwi-low-temperature, i-high-pressure, kunye ne-high-viscosity media. Uninzi lweevalvu zebhola zingasetyenziswa kumajelo eendaba ngamasuntswana aqinileyo amisiweyo, kwaye nawo angasetyenziswa kumgubo kunye nemidiya yegranular ngokweemfuno zezinto zokutywina;
I-valve yebhola ye-channel epheleleyo ayifanelekanga ukulungiswa kokuhamba, kodwa ifanelekile kwizihlandlo ezifuna ukuvulwa ngokukhawuleza kunye nokuvalwa, okulungele ukuvala ngokukhawuleza kweengozi; ngokuqhelekileyo ekusebenzeni kokutywina okungqongqo, ukunxiba, ukuhamba kwentamo, ukuvulwa ngokukhawuleza kunye nokuvala isenzo, ukunqunyulwa koxinzelelo oluphezulu (umahluko omkhulu woxinzelelo), kwimibhobho enengxolo ephantsi, i-vaporization, i-torque encinci yokusebenza, kunye nokuchasana kwamanzi amancinci, iivalve zebhola ziyacetyiswa.
Ivalve yebhola ifanelekile kwisakhiwo sokukhanya, ukunqunyulwa koxinzelelo oluphantsi, kunye neendaba ezidliwayo; ivalve yebhola ikwayeyona valve ifanelekileyo yobushushu obuphantsi kunye nemidiya ye-cryogenic. Kwinkqubo yokubhobhoza kunye nesixhobo seendaba zobushushu obuphantsi, ivalve yebhola yebhola ephantsi enebhonethi kufuneka ikhethwe;
Xa ukhetha ivalve yebhola edadayo, impahla yayo yokuhlala kufuneka ithwale umthwalo webhola kunye nendawo yokusebenza. Iivalve ezinkulu zebhola zifuna amandla amakhulu ngexesha lokusebenza, i-DN≥
Ivalve yebhola eyi-200mm kufuneka isebenzise ifomu yokuhambisa izixhobo zeentshulube; ivalve yebhola esisigxina ifanelekile kubukhulu obukhulu kunye nezihlandlo zoxinzelelo oluphezulu; ukongeza, ivalve yebhola esetyenziselwa inkqubo yezinto ezinetyhefu kakhulu kunye nemibhobho ephakathi enokutsha kufuneka ibe nesakhiwo somlilo kunye ne-antistatic.
4:imiyalelo yokukhetha ivalve yomqala
I-valve ye-throttle ifanelekile kwizihlandlo apho ubushushu obuphakathi buphantsi kwaye uxinzelelo luphezulu, kwaye lufanelekile kwiindawo ezifuna ukulungelelanisa ukuhamba kunye noxinzelelo. Ayifanelekanga kwi-medium kunye ne-viscosity ephezulu kwaye iqulethe iinqununu eziqinileyo, kwaye ayifanelekanga kwi-valve yokuhlukanisa.
5:Imiyalelo yokukhetha ivalve yeNkuku
Ivalve yeplagi ifanelekile kwizihlandlo ezifuna ukuvulwa nokuvala ngokukhawuleza. Ngokuqhelekileyo, ayifanelekanga kwi-steam kunye neendaba zokushisa eziphezulu, kubushushu obuphantsi kunye nemidiya ephezulu ye-viscosity, kunye neendaba ezinamacandelo amisiweyo.
6:Imiyalelo yokukhetha ivalve yebhabhathane
Ivalve yebhabhathane ifanelekile kwidayamitha enkulu (efana ne-DN﹥600mm) kunye nobude obufutshane besakhiwo, kunye nezihlandlo apho ulungelelwaniso lokuhamba kunye neemfuno zokuvula nokuvala ngokukhawuleza ziyafuneka. Ngokuqhelekileyo isetyenziselwa ubushushu ≤
I-80 ℃, uxinzelelo ≤ 1.0MPa amanzi, ioli, umoya oxinyiweyo kunye nezinye imidiya; ngenxa yoxinzelelo olukhulu lwelahleko yeevalvu zebhabhathane xa kuthelekiswa neevalvu zesango kunye neevalvu zebhola, iivalvu zebhabhathane zifanelekile kwiinkqubo zombhobho ezineemfuno zokulahleka koxinzelelo olungqongqo.
7:Jonga imiyalelo yokukhetha ivalve
Iivalve zokujonga ngokuqhelekileyo zifanelekile kwimidiya ecocekileyo, kungekhona kwimidiya equkethe amaqhekeza aqinileyo kunye ne-viscosity ephezulu. Xa ≤40mm, i-valve yokukhangela i-valve kufuneka isetyenziswe (ivunyelwe kuphela ukuba ifakwe kumbhobho othe tye); xa i-DN=50～400mm, ivalve yokukhangela ujingi kufuneka isetyenziswe (inokufakwa kuyo yomibini imibhobho ethe tyaba kunye nethe nkqo, njengeFakelwe kumbhobho othe nkqo, indlela yokuhamba kwendlela ephakathi kufuneka isuke ezantsi ukuya phezulu);
Xa i-DN≥450mm, ivalve yokujonga isithinteli kufuneka isetyenziswe; xa i-DN=100～400mm, ivalve yokujonga i-wafer nayo ingasetyenziswa; i-valve yokukhangela i-swing ingenziwa ibe nguxinzelelo oluphezulu kakhulu lokusebenza, i-PN inokufikelela kwi-42MPa, Inokusetyenziswa kuyo nayiphi na indawo yokusebenza kunye naluphi na ubushushu obusebenzayo ngokwezinto ezahlukeneyo zeqokobhe kunye neendawo zokutywinwa.
I-medium ngamanzi, umphunga, igesi, i-corrosive medium, i-oyile, iyeza, njl.
8:Imiyalelo yokukhetha ivalve ye-diaphragm
Ivalve ye-diaphragm ilungele i-oyile, amanzi, i-acidic medium kunye nephakathi equlethe izinto eziqinileyo ezimisiweyo ezinobushushu bokusebenza obungaphantsi kwe-200℃ kunye noxinzelelo olungaphantsi kwe-1.0MPa. Ayifanelekanga kwi-organic solvent kunye ne-oxidant medium;
Iivalvu ze-diaphragm ze-Weir kufuneka zikhethwe kwi-media ye-abrasive granular, kunye netheyibhile yeempawu zokuhamba kwe-weir diaphragm valves kufuneka zibhekiswe xa ukhetha iivalve ze-diaphragm ezinqabileyo; izivalo ze-diaphragm ezithe ngqo kufuneka zikhethwe kwii-viscous fluids, i-cement slurry kunye ne-sedimentary media; Izivalo ze-diaphragm akufuneki zisetyenziswe kwimibhobho yokufunxa ngaphandle kweemfuno ezithile zendlela kunye nesixhobo sokufunxa.
Umbuzo wokukhetha ivalve kunye nempendulo
1. Zeziphi izinto ezintathu eziphambili ekufuneka ziqwalaselwe xa ukhetha i-arhente yokuphumeza?
Imveliso ye-actuator kufuneka ibe mkhulu kunomthwalo wevalve kwaye kufuneka ihambelane ngokufanelekileyo.
Xa uhlola ukudibanisa okusemgangathweni, kuyimfuneko ukuqwalasela ukuba ukuhluka koxinzelelo oluvumelekileyo oluchazwe yi-valve luhlangabezana neemfuno zenkqubo. Xa umehluko woxinzelelo ukhulu, amandla angalinganiyo kwi-spool kufuneka abalwe.
Kuyimfuneko ukuqwalasela ukuba isantya sokuphendula se-actuator sihlangabezana neemfuno zenkqubo yokusebenza, ngakumbi i-actuator yombane.
2. Xa kuthelekiswa ne-actuator ye-pneumatic, ziziphi iimpawu ze-actuator zombane, kwaye zeziphi iintlobo zemveliso ezikhoyo?
Umthombo wokuqhuba umbane ngamandla ombane, alula kwaye alungele, kunye ne-thrust ephezulu, i-torque kunye nokuqina. Kodwa ulwakhiwo lunzima kwaye ukuthembeka kukubi. Ibiza kakhulu kune-pneumatic kwiinkcukacha ezincinci naphakathi. Isetyenziswa rhoqo kwiimeko apho kungekho mthombo werhasi okanye apho kungaqhubi ngqiqweni ugqabhuko-dubulo kunye nokumelana namadangatye kungafunekiyo. I-actuator yombane ineendlela ezintathu zokukhupha: i-angular stroke, i-linear stroke, kunye ne-multi-turn.
3. Kutheni umahluko wokunqunyulwa koxinzelelo lwevalve yekota yokujika umkhulu?
Umahluko woxinzelelo olusikiweyo wevalve yekota yokujika mkhulu kuba amandla aphumayo aveliswa liphakathi kumbindi wevalve okanye ipleyiti yevalvu ivelisa itorque encinci kakhulu kwishaft ejikelezayo, ngoko inokumelana noxinzelelo olukhulu. Iivalvu zebhabhathane kunye neevalvu zebhola zezona zixhaphakileyo kwikota yokujika.
4. Zeziphi iivalvu ekufuneka zikhethelwe indlela yokuhamba? njani ukukhetha?
Iivalvu zokulawula uphawu olunye ezifana neevalvu zesitulo esinye, iivalvu zoxinzelelo oluphezulu, kunye neevalve ezinemikhono etywiniweyo ngaphandle kwemingxuma yokulinganisa kufuneka ihambe. Kukho izinto ezilungileyo kunye nezibi ukuhamba okuvulekileyo kunye nokuhamba kuvaliwe. Ivalve yohlobo oluvulekileyo lwe-flow-open lusebenza ngokuzinzileyo, kodwa ukusebenza kokuzicoca kunye nokusebenza kokutywina akubi, kwaye ubomi bufutshane; ivalve yohlobo lokuqukuqela-close inobomi obude, ukusebenza ngokuzicoca kunye nokusebenza kakuhle kokutywina, kodwa uzinzo alubi kakuhle xa isiqu sedayamitha sincinci kunomthamo ongundoqo wevalve.
Iivalvu zesihlalo esinye, iivalvu ezincinci zokuqukuqela, kunye neevalvu ezinemikhono etywiniweyo zidla ngokukhethwa ukuba zihambe zivuleke, kwaye zivalwe xa kukho iimfuno zokugungxula okanye zokuzicoca. Uhlobo lweendawo ezimbini zokuvula ngokukhawuleza ivalve yokulawula uphawu ikhetha uhlobo oluvaliweyo lokuhamba.
5. Ukongeza kwisitulo esinye kunye nesitulo esiphindwe kabini kunye neevalvu zemikhono, zeziphi ezinye iivalve ezinemisebenzi yokulawula?
Iivalve ze-diaphragm, i-butterfly valves, i-O-shaped ball valves (ikakhulukazi i-cut-off), i-valve yebhola e-V (umlinganiselo omkhulu wohlengahlengiso kunye nefuthe lokucheba), kunye ne-eccentric rotary valves zonke zinemisebenzi yokulungelelanisa.
6. Kutheni ukukhetha imodeli kubaluleke ngaphezu kokubala?
Ukuthelekisa ukubala kunye nokukhetha, ukhetho lubaluleke kakhulu kwaye luyinkimbinkimbi. Ngenxa yokuba ukubala kuyindlela elula yokubala ifomyula, ayikona ngokwayo ukuchaneka kwefomula, kodwa ekuchanekeni kweeparameters zenkqubo enikeziweyo.
Ukhetho lubandakanya umxholo omningi, kunye nokungakhathali okuncinci kuya kukhokelela ekukhethweni okungafanelekanga, okungabangeli nje ukuchithwa kwabasebenzi, izinto eziphathekayo kunye nezibonelelo zemali, kodwa kunye nomphumo wokusetyenziswa okunganelisiyo, okuzisa iingxaki ezininzi zokusetyenziswa, ezifana nokuthembeka, ixesha lokuphila, kunye nokusebenza. Umgangatho njl.
7. Kutheni ivalve etywinwe kabini ingenakusetyenziswa njengesivalo sokuvala?
I-advanteji ye-core valve core yi-force balance structure, evumela ukuba umehluko omkhulu woxinzelelo, kodwa ukungabikho kwayo okubalaseleyo kukuba iindawo ezimbini zokutywina azikwazi ukunxibelelana kakuhle ngexesha elifanayo, okubangela ukuvuza okukhulu.
Ukuba isetyenziswa ngokungeyonyani kwaye isinyanzeliso ukunqunyulwa kwamathuba, isiphumo ngokucacileyo asilungile. Nokuba uphuculo oluninzi (olufana nevalve yemikhono etywinwe kabini) lwenzelwe yona, ayicebisi.
8. Kutheni ivalve yesitulo esiphindwe kabini kulula ukuyishukuma xa isebenza ngentunja encinane?
Kwisiseko esisodwa, xa i-medium is flow open type, ukuzinza kwevalve kulungile; xa i-medium yi-flow evaliweyo uhlobo, ukuzinza kwevalve kubi. Ivalve yesitulo esiphindwe kabini inespools ezimbini, i-spool esezantsi ivalekile, kwaye i-spool ephezulu ivulekile.
Ngale ndlela, xa usebenza ngokuvula okuncinci, i-valve evaliweyo engundoqo inokubangela ukunyakaza kwe-valve, yingakho i-valve yesitulo esiphindwe kabini ingasetyenziselwa ukusebenza kunye nokuvula okuncinci.
9. Ziziphi iimpawu zevalve yokulawula isitulo esinye esithe ngqo? Isetyenziswa phi?
Ukuhamba kokuvuza kuncinci, kuba kukho enye ingundoqo yevalve, kulula ukuqinisekisa ukutywinwa. Umyinge wokuphuma okusemgangathweni wokuhamba yi-0.01% KV, kunye noyilo olongezelelweyo lunokusetyenziswa njengevalve yokuvala.
Umahluko ovumelekileyo woxinzelelo uncinci, kwaye i-thrust inkulu ngenxa yamandla angalinganiyo. Ivalve △P ye-DN100 yi-120KPa kuphela.
Umthamo wokujikeleza uncinci. I-KV ye-DN100 kuphela i-120. Ihlala isetyenziswa kwizihlandlo apho ukuvuza kuncinci kwaye umehluko woxinzelelo awukho mkhulu.
10. Ziziphi iimpawu zevalve yokulawula izihlalo eziphindwe kabini? Isetyenziswa phi?
Umahluko ovumelekileyo woxinzelelo mkhulu, kuba unokuphelisa amandla amaninzi angalinganiyo. Ivalve ye-DN100 △P yi-280KPa.
Umthamo omkhulu wokujikeleza. I-KV ye-DN100 yi-160.
Ukuvuza kukhulu kuba ii-spools ezimbini azikwazi ukutywinwa ngexesha elinye. Umyinge wokuqukuqela osemgangathweni yi-0.1%KV, ephindwe ka-10 kunesivalo sesitulo esinye. I-valve yokulawula izihlalo eziphindwe kabini isetyenziswa kakhulu kwiimeko ezinomlinganiselo ophezulu woxinzelelo kunye neemfuno eziphantsi zokuvuza.
11. Kutheni i-anti-blocking ye-valve yokulawula i-straw-stroke ingalunganga, kwaye i-valve ye-angle-stroke inomsebenzi ochasayo wokuthintela?
I-spool yevalve ye-straw-stroke yi-throttling ethe nkqo, kwaye i-medium igeleza ngaphakathi nangaphandle ngokuthe tye. Indlela yokuhamba kumngxuma wevalve iya kujika ngokungenakuthintelwa kwaye ibuye umva, nto leyo eyenza ukuba indlela yokuhamba kwevalve ibenzima kakhulu (imilo ifana nesheyiphu ethi "S" eguqulweyo). Ngale ndlela, zininzi iindawo ezifileyo, ezibonelela ngesithuba sokuna kwemvula yendawo ephakathi, kwaye ukuba izinto ziqhubeka ngolu hlobo, ziya kubangela ukuvaleka.
Ulwalathiso lwe-throttling ye-valve yekota-turn i-horizontal direction. I-medium igeleza ngaphakathi nangaphandle ngokuthe tye, okulula ukuyithatha indawo engcolileyo. Ngexesha elifanayo, indlela yokuhamba ilula, kwaye indawo yemvula ephakathi incinci, ngoko i-valve yekota ine-anti-blocking performance.
12. Kuphantsi kwaziphi iimeko apho kufuneka ndisebenzise indawo yokubeka ivalvu?
Apho ukukhuhlana kukhulu kwaye indawo echanekileyo iyafuneka. Umzekelo, ubushushu obuphezulu kunye neevalvu zokulawula ubushushu obuphantsi okanye iivalvu zolawulo ezinokupakishwa kwegraphite eguquguqukayo;
Inkqubo ecothayo idinga ukunyusa isantya sokuphendula sevalve elawulayo. Ngokomzekelo, inkqubo yohlengahlengiso lobushushu, inqanaba lolwelo, uhlalutyo kunye nezinye iiparamitha.
Kuyimfuneko ukwandisa amandla okuphuma kunye namandla okusika i-activator. Umzekelo, ivalve yesitulo esinye ene-DN≥25, ivalve yesitulo esiphindwe kabini ene-DN>100. Xa uxinzelelo lwehla kuzo zozibini iziphelo zevalvu △P>1MPa okanye uxinzelelo lokungena P1>10MPa.
Ekusebenzeni kwenkqubo yokulawula uluhlu oluhlukeneyo kunye ne-valve yokulawula, ngamanye amaxesha kuyimfuneko ukutshintsha iindlela zokuvula umoya kunye nokuvalwa komoya.
Kuyimfuneko ukutshintsha iimpawu zokuhamba kwevalve elawulayo.
13. Ngawaphi amanyathelo asixhenxe okufumanisa ubungakanani bevalve elawulayo?
Qinisekisa ukubaleka okubaliweyo-Qmax, Qmin
Ukumisela umahluko woxinzelelo olubaliweyo-khetha umlinganiselo wokuchasa ixabiso le-S ngokweempawu zenkqubo, kwaye emva koko unqume umahluko woxinzelelo obaliweyo (xa ivalve ivulwe ngokupheleleyo);
Bala i-flow coefficient-khetha itshathi yefomula efanelekileyo yokubala okanye isoftwe ukufumana ubuninzi kunye nomzuzu we-KV;
Ukukhethwa kwexabiso le-KV--Ngokutsho kwexabiso eliphezulu le-KV kwi-series yemveliso ekhethiweyo, i-KV esondeleyo kwi-gear yokuqala isetyenziselwa ukufumana i-caliber yokukhetha okuphambili;
Ukuvulwa kweqondo lokujonga ubalo-xa i-Qmax ifuneka, ≯90% ukuvulwa kwevalvu; xa i-Qmin ≮10% ivula ivalvu;
Okwenziweyo umlinganiselo ohlengahlengiswayo ubalo lokujonga——imfuno ngokubanzi kufuneka ibe ≮10; Imfuno yeRactual＞R
Umgangatho umiselwa-ukuba awufaneleki, khetha kwakhona ixabiso le-KV kwaye uqinisekise kwakhona.
14. Kutheni ivalve yesitulo ithatha indawo yesitulo esinye kunye nesitulo esiphindwe kabini kodwa ungayifumani le uyifunayo?
Ivalve yomkhono eyaphuma ngeminyaka yoo-1960 yayisetyenziswa kakhulu ekhaya nakwamanye amazwe ngeminyaka yoo-1970. Kwizityalo zepetrochemical eziveliswe kwi-1980s, iivalve zemikhono zibalelwa kumlinganiselo omkhulu. Ngelo xesha, abantu abaninzi babekholelwa ukuba iivalve zemikhono zinokuthatha indawo yevalve enye kunye neyesibini. Ivalve yokuhlala yaba yimveliso yesizukulwana sesibini.
Ukuza kuthi ga ngoku, oku akunjalo. Iivalvu zesihlalo esinye, izitulo eziphindwe kabini, kunye neevalvu zemikhono zonke zisetyenziswa ngokulinganayo. Oku kungenxa yokuba ivalve ye-sleeve iphucula kuphela ifom yokugobhoza, uzinzo kunye nokugcinwa ngcono kunevalve yesitulo esinye, kodwa ubunzima bayo, i-anti-blocking kunye nezalathi zokuvuza ziyahambelana ne-valve yesitulo esinye kunye nesiphindwe kabini, ingasibuyisela njani eso sinye nesiphindwe kabini. iivalve zesitulo Ilaphu loboya? Ngoko ke, zinokusetyenziswa kuphela kunye.
15. Kutheni kufuneka kusetyenziswe isitywina esiqinileyo kangangoko xa kucinywa iivalvu?
Ukuvuza kwevalve yokuvala kuphantsi kangangoko. Ukuvuza kwevalve etywiniweyo kokona kuphantsi. Ngokuqinisekileyo, umphumo wokuvala ulungile, kodwa awugugi kwaye unokuthembeka okubi. Ukujonga kwimigangatho ephindwe kabini yokuvuza okuncinci kunye nokutywinwa okuthembekileyo, ukutywina okuthambileyo akulunganga njengokutywinwa okunzima.
Ngokomzekelo, i-valve yokulawula i-ultra-light egcweleyo, itywinwe kwaye ifakwe ngokhuseleko lwe-alloy-resistant-resistant, inokuthembeka okuphezulu, kwaye inomlinganiselo wokuvuza we-10-7, esele ikwazi ukuhlangabezana neemfuno zevalve yokuvala.
16. Kutheni isiqu sevalve yokulawula istroke sincinci?
Ibandakanya umgaqo olula womatshini: i-sliding friction ephezulu kunye ne-low rolling friction. Isiqu sevalve yevalve ye-straw-stroke sinyuka sinyuka, kwaye ukupakishwa kucinezelekile kancinci, kuya kupakisha isiqu sevalve ngokuqinileyo, okukhokelela kumohluko omkhulu wokubuya.
Ngenxa yesi sizathu, i-valve stem yenzelwe ukuba ibe yincinci kakhulu, kwaye ukupakishwa kusebenzisa i-PTFE ukupakisha kunye ne-coefficient encinci ye-friction ukunciphisa umva, kodwa ingxaki kukuba i-valve stem incinci, elula ukugoba, kunye nokupakisha. ubomi bufutshane.
Indlela efanelekileyo yokusombulula le ngxaki kukusebenzisa isiqu sevalve yokuhamba, oko kukuthi, ivalve yekota. Isiqu saso sijiya kayi-2 ukuya ku-3 kunesiqu sevalvu ethe ngqo. Ikwasebenzisa ukupakishwa kwexesha elide legraphite kunye nokuqina kwesiqu. Kulungile, ubomi bokupakisha bude, kodwa i-torque ye-friction incinci kwaye i-backlash incinci.
Ngaba ufuna abantu abaninzi bazi amava akho kunye namava akho emsebenzini? Ukuba ubandakanyeka kwisixhobo somsebenzi wobugcisa, kwaye unolwazi malunga nokugcinwa kwe-valve, njl., Unokunxibelelana nathi, mhlawumbi amava akho kunye namava Kuya kunceda abantu abaninzi.
Ixesha lokuposa: Nov-27-2021