2.5 I-plug valve

I-plug valve iyi-valve esebenzisa umzimba we-plug onembobo edlulayo njengengxenye yokuvula nokuvala, futhi umzimba we-plug ujikeleza nesiqu se-valve ukuze kufezwe ukuvulwa nokuvalwa. I-plug valve inesakhiwo esilula, ukuvulwa nokuvalwa okusheshayo, ukusebenza okulula, ukumelana noketshezi okuncane, izingxenye ezimbalwa kanye nesisindo esincane. Ama-plug valve atholakala ngezinhlobo eziqondile, ezintathu kanye nezindlela ezine. I-plug valve eqondile isetshenziselwa ukusika i-medium, kanti ama-plug valve amathathu kanye nezindlela ezine asetshenziselwa ukushintsha indlela ye-medium noma ukuphambukisa i-medium.

2.6I-valve yebhabhathane

I-valve ye-butterfly iyipuleti le-butterfly elijikeleza ngo-90° lizungeze i-axis eqinile emzimbeni we-valve ukuze kuqedwe umsebenzi wokuvula nokuvala. Ama-valve e-butterfly mancane ngobukhulu, alula ngesisindo futhi alula ngesakhiwo, aqukethe izingxenye ezimbalwa kuphela.

Futhi ingavulwa futhi ivalwe ngokushesha ngokujikeleza nje ama-90°, okulula ukuyisebenzisa. Uma ivalvu yebhabhathane isendaweni evulekile ngokuphelele, ubukhulu bepuleti yebhabhathane yikona kuphela ukumelana lapho i-medium igeleza emzimbeni wevalvu. Ngakho-ke, ukwehla kwengcindezi okubangelwa yivalvu kuncane kakhulu, ngakho-ke kunezici ezinhle zokulawula ukugeleza. Amavalvu ebhabhathane ahlukaniswe ngezinhlobo ezimbili zokuvala: uphawu oluthambile oluthambile kanye nophawu oluqinile lwensimbi. Ivalvu yokuvala enwebekayo, indandatho yokuvala ingafakwa emzimbeni wevalvu noma ifakwe emngceleni wepuleti yebhabhathane. Isebenza kahle kakhulu ekuvaleni futhi ingasetshenziswa ekugoqeni, amapayipi e-vacuum aphakathi nendawo kanye nemidiya ebolile. Amavalvu anezimbobo zensimbi ngokuvamile anempilo ende yenkonzo kunamavalvu anezimbobo ezinwebekayo, kodwa kunzima ukufeza ukuvala okuphelele. Ngokuvamile asetshenziswa ezimweni lapho ukugeleza nokwehla kwengcindezi kushintsha kakhulu futhi ukusebenza kahle kwe-throttling kuyadingeka. Izimbobo zensimbi zingazivumelanisa namazinga okushisa aphezulu okusebenza, kuyilapho izimbobo ezinwebekayo zinobunzima bokunqunyelwa izinga lokushisa.

2.7I-valve yokuhlola

I-valve yokuhlola iyi-valve engavimbela ngokuzenzakalela ukugeleza koketshezi okuphambene. I-disc ye-valve yokuhlola ivuleka ngaphansi kwesenzo sokucindezela koketshezi, bese uketshezi lugeleza lusuka ohlangothini lokungena luye ohlangothini lokukhipha. Lapho ingcindezi ohlangothini lokungena iphansi kunohlangothi lokukhipha, i-valve ivala ngokuzenzakalelayo ngaphansi kwesenzo somehluko wokucindezela koketshezi, amandla ayo adonsela phansi kanye nezinye izinto zokuvimbela uketshezi ukuthi lugeleze emuva. Ngokwesimo sesakhiwo, ingahlukaniswa ibe yi-valve yokuhlola yokuphakamisa kanye ne-valve yokuhlola yokushintsha. Uhlobo lokuphakamisa lunokuvalwa okungcono kanye nokumelana noketshezi okukhulu kunohlobo lokushintsha. Ekungeneni kokudonsa kwepayipi lokudonsa lepompo, kufanele kusetshenziswe i-valve engezansi. Umsebenzi wayo ukugcwalisa ipayipi lokungenisa lepompo ngamanzi ngaphambi kokuqala ipompo; ngemuva kokumisa ipompo, gcina ipayipi lokungenisa kanye nomzimba wepompo kugcwele amanzi ukulungiselela ukuqala futhi. I-valve engezansi ngokuvamile ifakwa kuphela epayipini eliqondile ekungeneni kwepompo, kanti i-medium igeleza isuka phansi iye phezulu.

2.8Ivalvu ye-diaphragm

Ingxenye yokuvula nokuvala yevalvu ye-diaphragm iyi-diaphragm yerabha, ehlanganiswe phakathi komzimba wevalvu nesembozo sevalvu.

Ingxenye ephakathi ephumayo ye-diaphragm inamathele esiqwini se-valve, futhi umzimba we-valve umbozwe ngerabha. Njengoba i-medium ingangeni emgodini wangaphakathi wesembozo se-valve, i-valve stem ayidingi ibhokisi lokugcwala. I-valve ye-diaphragm inesakhiwo esilula, ukusebenza kahle kokuvala, ukulungiswa okulula, kanye nokumelana noketshezi okuphansi. Ama-valve e-diaphragm ahlukaniswe ngohlobo lwe-weir, uhlobo oluqondile, uhlobo lwe-angle yesokudla kanye nohlobo lokugeleza okuqondile.

3. Imiyalelo yokukhetha amavalvu evame ukusetshenziswa

3.1 Imiyalelo yokukhetha ivalvu yesango

Ngaphansi kwezimo ezivamile, ama-valve esango kufanele akhethwe. Ngaphezu kokufaneleka umusi, uwoyela kanye nezinye izinto ezisetshenziswayo, ama-valve esango nawo afaneleka ezintweni ezisetshenziswayo eziqukethe izinto eziqinile ezihlanganisiwe kanye ne-viscosity ephezulu, futhi afaneleka kuma-valve ezinhlelweni zokungenisa umoya kanye nezinhlelo ze-vacuum eziphansi. Kwizinto ezisetshenziswayo eziqukethe izinhlayiya eziqinile, umzimba we-valve yesango kufanele ufakwe imbobo eyodwa noma ezimbili zokuhlanza. Kwizinto ezisetshenziswayo ezisezingeni eliphansi, kufanele kukhethwe ama-valve esango akhethekile asezingeni eliphansi.

3.2 Imiyalelo yokukhetha ama-valve okumisa

I-valve yokumisa ifanele amapayipi anezidingo eziphansi zokumelana noketshezi, okungukuthi, ukulahlekelwa yingcindezi akucatshangelwa kakhulu, kanye namapayipi noma amadivayisi anezimo zokushisa eziphakeme kanye ne-media yokucindezela okuphezulu. Ifanele amapayipi anomusi kanye namanye aphakathi ane-DN <200mm; ama-valve amancane angasebenzisa ama-valve asikiwe. Ama-valve, njenge-valve yenaliti, ama-valve ezinsimbi, ama-valve okulinganisa, ama-valve okulinganisa ingcindezi, njll.; ama-valve okumisa anokulungiswa kokugeleza noma ukulungiswa kwengcindezi, kodwa ukunemba kokulungiswa akudingeki, futhi ububanzi bepayipi buncane kakhulu, ngakho-ke i-valve yokumisa noma i-valve yokubhoboza kufanele isetshenziswe i-Valve; Kwizimo ezinobuthi obukhulu, kufanele kusetshenziswe i-valve yokumisa evaliwe nge-bellows; noma kunjalo, i-valve yokumisa akufanele isetshenziselwe izimo ezinobuthi obukhulu kanye nezimo eziqukethe izinhlayiya ezivame ukuthuthwa yi-sedimentation, futhi akufanele isetshenziswe njenge-valve yomoya kanye ne-valve ohlelweni lwe-vacuum oluphansi.

3.3 Imiyalelo yokukhetha ivalvu yebhola

Ama-valve ebhola afanelekela imidiya yokushisa okuphansi, enomfutho ophezulu, kanye ne-viscosity ephezulu. Ama-valve amaningi ebhola angasetshenziswa kwimidiya enezinhlayiya eziqinile ezilengayo, futhi angasetshenziswa nakwimidiya eyimpuphu kanye ne-granular ngokwezidingo zezinto zokuvala; ama-valve ebhola anesiteshi esigcwele awafaneleki ukulawulwa kokugeleza, kodwa afaneleka ngezikhathi ezidinga ukuvulwa nokuvalwa okusheshayo, okulula ukukusebenzisa. Ukunqanyulwa okuphuthumayo ezingozini; ngokuvamile kunconywa kumapayipi anokusebenza okuqinile kokuvala, ukuguguleka, iziteshi zokuncipha, ukunyakaza kokuvula nokuvala okusheshayo, ukunqanyulwa kokucindezela okuphezulu (umehluko omkhulu wokucindezela), umsindo ophansi, isenzakalo segesi, i-torque encane yokusebenza, kanye nokumelana okuncane koketshezi. Sebenzisa ama-valve ebhola; ama-valve ebhola afanelekela izakhiwo zokukhanya, ukunqanyulwa kokucindezela okuphansi, kanye nemidiya ebolile; ama-valve ebhola nawo angama-valve afaneleka kakhulu kwimidiya yokushisa okuphansi kanye ne-cryogenic. Ngezinhlelo zamapayipi namadivayisi anemidiya yokushisa okuphansi, ama-valve ebhola okushisa okuphansi anezembozo zama-valve kufanele asetshenziswe; khetha Uma usebenzisa i-valve yebhola entantayo, izinto zayo zokuhlala kufanele zithwale umthwalo webhola kanye nendawo yokusebenza. Ama-valve ebhola anobubanzi obukhulu adinga amandla amakhulu ngesikhathi sokusebenza. Amavalvu ebhola ane-DN ≥ 200mm kufanele asebenzise ukudluliselwa kwegiya lezibungu; amavalvu ebhola aqinile afanelekela ububanzi obukhulu kanye nezimo zokucindezela okuphezulu; ngaphezu kwalokho, amavalvu ebhola asetshenziswa kumapayipi enqubo yezinto ezinobuthi obukhulu kanye nezinto ezivuthayo kufanele abe nezakhiwo ezingashisi umlilo futhi ezingashukumi.

3.4 Imiyalelo yokukhetha ivalvu yomphini

Ivalvu yokuphusha ifaneleka ngezikhathi lapho izinga lokushisa eliphakathi liphansi futhi ingcindezi iphezulu. Ifaneleka ezingxenyeni ezidinga ukulungisa izinga lokugeleza kanye nengcindezi. Ayifaneleki kuma-media ane-viscosity ephezulu kanye nezinhlayiya eziqinile, futhi ayifaneleki ukusetshenziswa njengevalvu yokuzihlukanisa.

3.5 Imiyalelo yokukhetha ivalvu yepulagi

I-plug valve ifaneleka ngezikhathi ezidinga ukuvulwa nokuvalwa okusheshayo. Ngokuvamile ayifaneleki umusi kanye ne-medium enezinga lokushisa eliphezulu. Isetshenziselwa i-medium enezinga lokushisa eliphansi kanye ne-viscosity ephezulu, futhi ifaneleka ne-medium enezinhlayiya ezilengayo.

3.6 Imiyalelo yokukhetha ivalvu yebhabhathane

Amavalvu e-Butterfly afaneleka ezimweni ezinobubanzi obukhulu (njenge-DN﹥600mm) kanye nobude obufushane besakhiwo, kanye nezimo lapho kudingeka ukulungiswa kokugeleza kanye nokuvulwa nokuvalwa okusheshayo. Ngokuvamile asetshenziselwa imikhiqizo yamanzi, uwoyela kanye nokucindezela okunamazinga okushisa angu-≤80°C kanye nokucindezela okungu-≤1.0MPa. Umoya kanye nezinye izinto; ngoba ukulahlekelwa yingcindezi kwamavalvu e-butterfly kukhulu uma kuqhathaniswa namavalvu esango namavalvu ebhola, amavalvu e-butterfly afaneleka ezinhlelweni zamapayipi ezinezidingo zokulahlekelwa yingcindezi okuxekethile.

3.7 Hlola imiyalelo yokukhetha amavalvu

Ama-valve okuhlola ngokuvamile afanelekela imidiya ehlanzekile futhi awafanelekeli imidiya equkethe izinhlayiya eziqinile kanye ne-viscosity ephezulu. Uma i-DN ≤ 40mm, kufanele kusetshenziswe i-valve yokuhlola ukuphakama (kuvunyelwe ukufakwa kuphela kumapayipi avundlile); uma i-DN = 50 ~ 400mm, kufanele kusetshenziswe i-valve yokuhlola ukuphakama okujiyile (ingafakwa kumapayipi avundlile navundlile, Uma ifakwe kupayipi elivundlile, indlela yokugeleza ephakathi kufanele ibe kusukela phansi kuya phezulu); uma i-DN ≥ 450mm, kufanele kusetshenziswe i-valve yokuhlola i-buffer; uma i-DN = 100 ~ 400mm, i-valve yokuhlola i-wafer nayo ingasetshenziswa; i-valve yokuhlola ukuphakama I-valve yokubuyisela ingenziwa ibe nomfutho wokusebenza ophezulu kakhulu, i-PN ingafinyelela ku-42MPa, futhi ingasetshenziswa kunoma iyiphi imidiya yokusebenza nanoma yiluphi uhla lokushisa lokusebenza kuye ngezinto zegobolondo kanye nezivalo. Imidiya ingamanzi, umusi, igesi, imidiya ebolile, uwoyela, umuthi, njll. Ububanzi bokushisa bokusebenza bemidiya buphakathi kuka--196 ~ 800℃.

3.8 Imiyalelo yokukhetha ivalvu ye-diaphragm

I-valve ye-diaphragm ifaneleka uwoyela, amanzi, i-acidic media kanye ne-media equkethe izinto eziqinile ezilengayo ezinokushisa okusebenzayo okungaphansi kuka-200°C kanye nomfutho ongaphansi kuka-1.0MPa. Ayifaneleki izinyibilikisi eziphilayo kanye ne-oxidant enamandla. Ama-valve e-diaphragm ohlobo lwe-Weir kufanele akhethwe kwi-abrasive granular media. Uma ukhetha i-weir type diaphragm valve, bheka ithebula lezimpawu zokugeleza kwayo; uketshezi oluqinile, ama-slurry esimende kanye ne-precipitating media kufanele kusetshenziswe ama-diaphragm valve aqondile; ngaphandle kwezidingo ezithile, ama-valve e-diaphragm akufanele asetshenziswe kumapayipi e-vacuum kanye nemishini ye-vacuum.