Indlela yokugaya i-valve ebusweni kanye nezidingo zezinto ezidingekayo zokugaya i-valve efanelekayo izinga lokushisa lokusebenza kanye nengxenye eyinhloko yokukhethwa kwezinto

Indlela yokugaya i-valve ebusweni kanye nezidingo zezinto ezidingekayo zokugaya i-valve efanelekayo izinga lokushisa lokusebenza kanye nengxenye eyinhloko yokukhethwa kwezinto

I-valve sealing surface ihlukaniswe yaba izinhlobo ezimbili zendiza kanye ne-conical sealing surface, okumele ibe phansi ekukhiqizeni ama-valve. Ukugaya okwenziwa ngesandla kwezindawo zokuvala ama-valve kwenziwa kusetshenziswa amathuluzi okugaya alula kuphela. Ukugaya ngesandla ngokuvamile kusetshenziswa ukugaya okumanzi, ngesikhathi sokugaya okumanzi ngokuvamile ukwengeza i-abrasive agent encane, ukuze kufihlwe izinhlayiya ezilimazayo endaweni yokusebenza, futhi njalo wengeze izinhlayiya ezintsha eziqhumayo, ukuze uthole ukusebenza kahle kokugaya. Ezindaweni zokuvala ezidinga ukunemba okuphezulu nokuqeda, kwesinye isikhathi ipuleti lesihlabathi elicindezelwe lisetshenziselwa ukugaya okomile.
Izidingo zokusetshenziswa kwamathuluzi
Enqubweni yokugaya, kunezidingo ezimbili zezinto zethuluzi lokugaya: enye iwukuthi impahla yethuluzi lokugaya kufanele ifakwe kalula ohlamvu lwe-abrasive; Okwesibili, ithuluzi lokugaya impahla kufanele likwazi ukugcina ukunemba komumo wejometri wethuluzi lokugaya isikhathi eside.
Ukuze izinhlayiya ze-abrasive zifakwe kalula, ithuluzi lokugaya kufanele libe lithambile kune-workpiece material. Kodwa futhi ayithambile kakhulu, ngaphandle kwalokho i-abrasive izoba iningi noma yonke ishumekiwe futhi inciphise noma ilahlekelwe umphumela wokusika; Futhi izinto ezinkulu ezithambile kakhulu zizokwenza ithuluzi lokugaya liguge ngokushesha. Ukuze uvimbele ithuluzi lokugaya ekulahlekelweni ukunemba kwejometri ngenxa yokugqoka okusheshayo, ithuluzi lokugaya impahla kufanele libe nokumelana okuhle kokugqoka, futhi inhlangano yayo kufanele ibe yinto efanayo. Ukugqokwa kwezinto ezinokwakheka okufanayo nakho kufana, okuzuzisa ukugcina ukunemba kwejometri kwethuluzi.
Lapho ugaya indawo yokuvala i-valve, ithuluzi lokugaya lisetshenziselwa ukusebenzisa insimbi empunga. Ithuluzi lokugaya insimbi elimpunga lilungele ukugaya indawo yokubeka uphawu yezinto ezihlukahlukene zensimbi, lingathola ikhwalithi engcono yokugaya kanye nokukhiqiza okuphezulu. Indawo evalekayo yokugaya insimbi, ithusi nensimbi engagqwali ye-austenitic ngokuvamile yenziwa ngensimbi empunga ye-HB120-160. I-grey cast iron HB150-190 ivamise ukusetshenziselwa indawo yokuvala yokugaya ingxubevange eqinile nensimbi ecishiwe, futhi amamaki ensimbi asetshenziswa ngokumpunga yi-HT150 kanye ne-HT1200.
Indlela yokugaya i-valve sealing surface
I-valve sealing surface ihlukaniswe yaba izinhlobo ezimbili zendiza kanye ne-conical sealing surface, okumele ibe phansi ekukhiqizeni ama-valve.
Indlela yokugaya i-valve ebusweni inezinhlobo ezimbili zokugaya ngesandla kanye nokugaya ngomshini.
(1) Ukugaya mathupha kwendawo yokuvala i-valve
Ukugaya okwenziwa ngesandla kwezindawo zokuvala ama-valve kwenziwa kusetshenziswa amathuluzi okugaya alula kuphela. Ukugaya ngesandla ngokuvamile kusetshenziswa ukugaya okumanzi, ngesikhathi sokugaya okumanzi ngokuvamile ukwengeza i-abrasive agent encane, ukuze kufihlwe izinhlayiya ezilimazayo endaweni yokusebenza, futhi njalo wengeze izinhlayiya ezintsha eziqhumayo, ukuze uthole ukusebenza kahle kokugaya. Ezindaweni zokuvala ezidinga ukunemba okuphezulu nokuqeda, kwesinye isikhathi ipuleti lesihlabathi elicindezelwe lisetshenziselwa ukugaya okomile.
① Ukugaya mathupha kwendiza yokuvala yomzimba we-valve. I-valve body seal plane itholakala emgodini womzimba we-valve, ukugaya kunzima. Ngokuvamile, kusetshenziswa ithuluzi lokugaya elimise okwe-disc elinembobo yesikwele, elibekwe endaweni yokuvala imbobo yangaphakathi, bese kuba isibambo eside esinekhanda lesikwele sisetshenziselwa ukushayela idiski yokugaya ukunyakaza kokugaya. Kukhona i-cylindrical boss noma igasket eqondisayo epuletini lokugaya ukuze kuvinjwe ithuluzi lokugaya ukuthi lingashiyi indawo yokuvala iringi kancane phakathi nenqubo yokugaya futhi ibangele ukugaya okungalingani. Umfanekiso 8-6-5 ubonisa Umdwebo WOKUgaya okwenziwa ngesandla WE-valve yomzimba wevalvu yesango kanye ne-globe valve.
Umfanekiso 8. Ukugaya ngesandla kwendiza yomzimba 1 6 5
Ngaphambi kokugaya ngaphansi kwendiza yokuvala yomzimba we-valve, ubuso obusebenzayo bethuluzi lokugaya kufanele busulwe nge-parafini noma ngophethiloli, futhi unqenqema olundizayo kanye ne-burr endaweni yokuvala yomzimba we-valve kufanele kususwe, bese kuhlanganiswe ungqimba. yokuhubhuka endaweni yokuvala. I-Pestle emgodini womzimba, ukuze ilingane ngokucophelela endaweni yokuvala, bese usebenzisa isibambo eside ukwenza ipuleti le-pestle ukuze uthole isiqondiso esihle nesibi.
Guqula ukunyakaza. Zungezisa ngokwewashi ngo-180°, ngokuphikisana newashi 90°, njalo njalo. Ngokuvamile, ngemva kokuphenduka izikhathi ezingaphezu kweziyishumi, izinhlayiya ezilumayo ku-abrasive agent ziye zaba buthuntu, ngakho-ke ipuleti lokugaya kufanele liphakanyiswe kaningi ukuze kwengezwe i-ejenti entsha yokugwaza.
Ukucindezela kokugaya kufanele kube okufanayo futhi akufanele kube kukhulu kakhulu. Ingcindezi yocwaningo olunzima ingaba nkulu: ucwaningo oluhle kufanele lube luncane. Ukunakwa kufanele kukhokhwe ukuze ungafaki ingcindezi futhi wenze ithuluzi lokugaya liphume kancane endizeni yokuvala. Ngemva kokugaya isikhathi esithile, ukuhlola ukushuba kwe-workpiece. Ngalesi sikhathi, ungakwazi ukukhipha i-pestle, usule indawo yokuvala ngophalafini noma ngophethiloli, bese ubeke ngobumnene ipuleti eliyisicaba lokuhlola elimise okwe-disc endaweni yokuvala bese ulihudula ngesandla ngobumnene. Ngemuva kokukhipha ipuleti eliyisicaba, imikhondo yokuxhumana endaweni yokuvala ingabonwa. Lapho indawo yophawu lwendandatho ibonisa iminonjana yokuxhumana ngokulinganayo, futhi isilinganiso sobubanzi bokuxhumana kwe-radial kuya kububanzi bendawo yokuvala (okungukuthi, indawo yokuvala kanye nepuleti lokuhlola lezinto ezizenzekele ngokuqondana) ifinyelela inani elishiwo kule nqubo, ubulukhuni bungaba kubhekwa njengabafanelekayo.
② Ukugaya ngesandla kwepuleti lesango kanye nendiza ye-valve disc seal. Izindiza zokuvala isango, i-disc kanye nesihlalo zingagaywa ngesandla kusetshenziswa ipuleti lokugaya. Ngaphambi komsebenzi, ipuleti ehlanzekile ihlanganiswe ngokulinganayo ngesendlalelo se-abrasive, futhi ucezu lokusebenza lunamathele epuleti futhi lungashintshwa futhi luhanjiswe ngendlela eqondile ngesandla, njengoba kuboniswe kuMfanekiso 8-6-6, noma ku-Figure. 8 umnyakazo. Ukusebenza kahle kokugaya kungathuthukiswa ngoba isiqondiso sokunyakaza sokugaya sishintshwa njalo futhi izinhlayiya ezilimazayo zigaya ngendlela entsha.
Umfanekiso 8. Ukugaya ngesandla kwendawo yokuvala yesango le-6-6
Ukuze ugweme ukuguga okungalingani kwepuleti lokugaya, ungahlali ugaya phakathi kwepuleti, kodwa kufanele uhlale ushintsha izingxenye ebusweni bepuleti, ngaphandle kwalokho ipuleti lokugaya lizolahlekelwa ngokushesha ukunemba kwendiza.
Isihlalo se-DISC kanye ne-VALVE isihlalo esomile somumo we-wedge, indiza yokuvala isiyingi sesisindo ayilingani, ukugaya kufanele kube ekugcineni kwayo okuncane (owaziwa nangokuthi "ikhanda elincane") kwengeze ukucindezela okukhulu, ukuze iyunifomu yokucindezela indiza yokuvala uphawu. , ukuze ungabangeli ukuguqulwa kwe-Angle ye-workpiece wedge.
Ukugaya i-Throttle valve disc kungasetshenziswa ngethuluzi lokugaya i-disk yembobo, indlela yokugaya kanye ne-valve sealing surface ngokuyisisekelo iyafana.
I-taper sealing surface yokugaya ngesandla. Ukugaya i-tapered seal surface kudinga ukusetshenziswa kwenduku ecijile noma umkhono. I-TAPER YE-PESTLE KANYE NE-PESTLE SLEEVE KUZOhambelana ne-taper yobuso obuvala umzimba be-valve noma ubuso bokuvalwa kwe-disc, ngokulandelanayo. Kufanele kube nomsele ozungezayo ongashoni kukhoni yenduku yokugaya kanye nomkhono wokugaya womzimba weqhude eligayayo kanye nepulaki yokugcina i-abrasive agent eyeqile. Lapho ugaya umzimba we-valve yembulunga, ngenxa yokuthi ikhoni yokuvala imfushane kakhulu futhi ayizinzi kahle, ivamise ukungezwa ipuleti lomhlahlandlela endaweni yokuma ye-flange emzimbeni wevalvu ukuze kugcinwe induku yokugaya izinzile. Umfanekiso 8-6-7 ubonisa umdwebo wohlelo lokugaya okwenziwa ngesandla sendawo yokuvalela uphawu.
Umfanekiso 8-6-7 Ukugaywa kwezandla kwendawo yokuvalela uphawu
Lapho ugaya indawo yokubeka uphawu eyi-conical, sebenzisa ungqimba lwe-agent abrasive ngokulinganayo kuthuluzi lokugaya elisuliwe, ulibeke kancane phezu kwendawo yokusebenza, bese ucindezela ithuluzi lokugaya ngesandla bese uzungezisa ithuluzi lokugaya: ngemva kwamaviki angu-3 kuya kwangu-4 wokuzungezisa. , ithuluzi lokugaya lingakhishwa ukuze kushintshwe indawo eyisiyingi ngaphambi kokugaya. Ama-abrasives kufanele afakwe njalo ngesikhathi sokugaya.
I-taper yenduku yokugaya yomzimba weqhude kanye nomkhono wokugaya wepulaki lokugaya kufanele kuhambisane, ngaphandle kwalokho kuzoba lula ukuvuza phakathi kwendawo yokuvala ecijile ngemva kokugaya.
Okunye okucatshangelwayo okubalulekile ekwakhiweni kwe-valve nokukhethwa kwempahla ukushisa okusebenzayo kwe-valve. Ukuze kumiswe izinga lokushisa elifanele lezinto ezisetshenziswayo ze-valve, izinga lokushisa elifanelekile lokusebenza kanye nezidingo ezihlobene zezinto eziyinhloko ze-valve zicaciswe ezintweni ezibonakalayo zezinhlobo ezihlukahlukene zensimbi kanye No. ukuhlolwa kwemikhiqizo ye-valve. Ngaphezu kwalokho, kusukela ezicini zokuphathwa kwezobuchwepheshe, ukuphathwa kokukhiqiza kanye nokuthengwa kwezinto ezibonakalayo, impahla ye-valve enokuhlelwa kwesistimu efanelekile kakhulu ikhethiwe.
1 ukubuka konke
Okunye okucatshangelwayo okubalulekile ekwakhiweni kwama-valve nokukhetha kwempahla ukushisa okusebenzayo kwe-valve. Ukuze kumiswe izinga lokushisa elifanele lezinto ezisetshenziswayo ze-valve, izinga lokushisa elifanelekile lokusebenza kanye nezidingo ezihlobene zezinto eziyinhloko ze-valve zicaciswe ezintweni ezibonakalayo zezinhlobo ezihlukahlukene zensimbi kanye No. ukuhlolwa kwemikhiqizo ye-valve. Ngaphezu kwalokho, kusukela ezicini zokuphathwa kwezobuchwepheshe, ukuphathwa kokukhiqiza kanye nokuthengwa kwezinto ezibonakalayo, impahla ye-valve enokuhlelwa kwesistimu efanelekile kakhulu ikhethiwe.
2.1 ** impahla ye-valve yokushisa
** i-valve yezinga lokushisa [-254 (i-hydrogen ewuketshezi) ~ -101℃ (ethylene)] impahla eyinhloko kufanele ikhethe ubuso obugxile ku-cubic lattice insimbi engagqwali ye-austenitic, ingxubevange yethusi noma ingxubevange ye-aluminium, izici zayo zokushisa eziphansi emva kokwelashwa kokushisa, ikakhulukazi izinga lokushisa eliphansi. ukuqina komthelela kumele kuhlangabezane nezimfuneko zezinga.
Lezi zinsimbi ezilandelayo ze-austenitic ezingenasici zingasetshenziswa ukwenza ama-valve afudumele. ASTM A351 CF8M, CF3M, CF8 kanye CF3, ASTM A182 F316, F316L, F304 kanye F304L, ASTM A433 316, 316L, 304, 304L kanye CF8D (dizayinwe by Lanzhou High Pressure G18, ifektri Lanzhou High Pressure 1 Valve 8 code standard). ** Umzimba, ikhava, isango noma idiski yevalvu efudumele kufanele yenziwe i-cryogenized ku-nitrogen ewuketshezi (-196℃) ngaphambi kokuqeda.