I-valve evame ukusetshenziswa izinto ezingezona ezensimbi hlola imodi yokuxhuma phakathi kwe-actuator kagesi kanye ne-valve ngayinye

I-valve evame ukusetshenziswa izinto ezingezona ezensimbi hlola imodi yokuxhuma phakathi kwe-actuator kagesi kanye ne-valve ngayinye

Izinga lokushisa elilinganiselwe le-ethylene propylene isihlalo serabha ngu-28 ¡æ~120¡æ. I-EPDM imele i-terpolymer ye-ethylene, i-propylene, ne-diene, ngokuvamile ebizwa ngokuthi i-EPT Nordell. Ukumelana ne-ozone okuhle kakhulu nokumelana nesimo sezulu, ukusebenza kahle kokufakwa kukagesi, ukumelana kahle nama-polar capacitor kanye nemidiya ye-inorganic. Ngakho-ke, ingasetshenziswa embonini ye-HVAC, amanzi, i-phosphate ester, utshwala, i-ethylene glycol, njll. IZIHLALO zenjoloba ye-Ethylene propylene AKUNCONYISWA UKUSETSHENZISWA KU-HYDROCARBON organic Solvents NAMAFUTHA, chlorinaTED HYDROCARBONS, turpentINE, noma enye i-petroleum.
I-valve evame ukusetshenziswa izinto ezingezona ezensimbi
Sawubona, irabha ye-nitrile
Ibanga lokushisa elilinganiselwe lesihlalo senjoloba ye-Nitrile ngu--18 ¡ã C kuya ku-100 ¡ã C. Evame ukubizwa ngokuthi, i-NITRILE, noma i-HYCAR. Kuyinto yenjoloba yendawo yonke elungele amanzi, igesi, uwoyela namafutha, uphethiloli (ngaphandle kukaphethiloli onezithasiselo), utshwala ne-ethylene glycol, igesi ye-petroleum ewuketshezi, i-propane ne-butane, i-fuel oil kanye neminye imidiya eminingi. Ibuye ibe nokumelana okuhle kokugqoka kanye nokumelana nokuguqulwa. Ibanga lokudla (FG) isihlalo senjoloba ye-nitrile elinganiselwe izinga lokushisa ngu- -18¡æ kuya ku-82¡æ. Ukwakheka kwayo kuvumelana ne-CFR Standard Ingxenye 21, Isigaba 177.2600. Ingasetshenziswa ngendlela efanayo nerabha ye-nitrile evamile kodwa idinga imvume ye-FDA.
Ethylene propylene rubber EPDM
Isihlalo serabha ye-ethylene propylene isihlalo serabha esilinganiselwe izinga lokushisa ngu-28¡æ~120¡æ. I-EPDM imele i-terpolymer ye-ethylene, i-propylene, ne-diene, ngokuvamile ebizwa ngokuthi i-EPT Nordell. Ukumelana ne-ozone okuhle kakhulu nokumelana nesimo sezulu, ukusebenza kahle kokufakwa kukagesi, ukumelana kahle nama-polar capacitor kanye nemidiya ye-inorganic. Ngakho-ke, ingasetshenziswa embonini ye-HVAC, amanzi, i-phosphate ester, utshwala, i-ethylene glycol, njll. IZIHLALO zenjoloba ye-Ethylene propylene AKUNCONYISWA UKUSETSHENZISWA KU-HYDROCARBON organic Solvents NAMAFUTHA, chlorinaTED HYDROCARBONS, turpentINE, noma enye i-petroleum.
Izinga lokushisa lebanga lokudla le-ethylene propylene isihlalo serabha elilinganiselwe izinga lokushisa ngu-28¡æ~120¡æ. Ukwakhiwa kwayo kuhambisana ne-CFR Standard Ingxenye 21, Isigaba 177.2600. Ingasetshenziswa ngendlela efanayo nerabha ye-nitrile evamile kodwa idinga imvume ye-FDA.
I-PTFE PTFE
Ibanga lokushisa elilinganiselwe isihlalo se-Teflon lingu-32 ¡ã C kuya ku-200 ¡ã C. Ukumelana okuhle kakhulu nezinga lokushisa eliphezulu nokugqwala kwamakhemikhali. Ngenxa yokuminyana okuphezulu kwe-polytetrafluoroethylene, ukungeneka okuhle kakhulu, kodwa futhi kungavimbela ukugqwala kwemithombo eminingi yamakhemikhali.
I-TEFLON Eqhubayo Iwumkhiqizo we-TEFLON OLUNGISIWE ovumela isimanje ukudlula olayini UKUSUSA UKUFAKA KWE-TEfloN. Ngenxa ye-conductivity yayo, i-polytetrafluoroethylene eqhubayo ayikwazi ukuhlolwa ngenhlansi kagesi.
I-polyteflon eqinisiwe ye-RTFE
I-RTFE iwukuguqulwa kwezinto ze-PTFE. Nakuba i-coefficient yokungqubuzana ye-PTFE emsulwa iphansi kakhulu (0.02~0.04), kodwa ukugqokwa kuhle kakhulu, futhi ngenxa yokukhasa kwayo kalula, izakhiwo ezingezinhle zokusebenzisa imishini, umthamo ophansi wokuthwala, ukungaqini kahle kwe-dimensional nezinye izici, njengoba impahla yokungqubuzana inokukhulu. ukulinganiselwa. Ukuguqulwa kuphela, ngendlela yenhlanganisela yezinto ukuze kuhlangatshezwane nezidingo ezikhethekile zezinto zokuvala ezingagqoki kuzo zonke izigaba zokuphila, ekuthuthukiseni ukumelana nokugqokwa kwe-PTFE, okungaxutshwa nezinye izinto ezingagugi njenge-glass fibre, i-carbon fiber. , i-graphite, i-molybdenum disulfide, impushana yethusi nezinye izinhlanganisela eziphilayo, Amalunga anezikhala akhiwa esakhiweni esinezingqimba ze-PTFE ukuze kuthuthukiswe ukuqina, ukuqhutshwa kokushisa, ukumelana nokukhasa, nokumelana nokugqoka.
I-Viton yerabha ye-fluorine
Izinga lokushisa elilinganiselwe lesihlalo senjoloba e-fluorine ngu--18¡æ~150¡æ. I-Viton inguphawu lokuthengisa olubhalisiwe lwe-DuPont Company, futhi i-Fluorel wuphawu lokuthengisa olubhalisiwe olulingana nenjoloba eyi-fluorine ye-3M Company. Le nto inokumelana nokushisa okuphezulu kanye nokumelana nokugqwala kwamakhemikhali okuhle kakhulu. Ifanele imikhiqizo ye-hydrocarbon, ukugxila okuphansi kanye nokuhlushwa okuphezulu kwama-mineral acids, kodwa hhayi emithonjeni ye-steam namanzi (ukumelana namanzi okungalungile).
I-ultra high molecular weight polyethylene UHMWPE
Izihlalo ze-polyethylene ezinesisindo esiphezulu samangqamuzana zilinganiselwe ukusuka ku--32 ¡ã C kuya ku-88 ¡ã C. Le nto inokumelana okungcono kakhulu nezinga lokushisa eliphansi kune-PTFE, kodwa isenokumelana okuhle kakhulu kwamakhemikhali. I-Uhmwpe futhi inokumelana nokugqokwa okuhle kanye nokumelana nokugqwala, futhi ingasetshenziswa ezimeni eziphakeme zokumelana nokugqokwa.
I-Silicone yerabha yethusi I-Silicone
Irabha ye-silicone ye-Copper iyi-polymer enamaqembu e-organic, uchungechunge lwawo oluyinhloko lwakhiwe i-silicon nama-athomu oksijini. Izinga lokushisa elilinganiselwe lisukela ku- -100 ¡ã C kuya ku-300 ¡ã C. Inokumelana nokushisa okuhle nokumelana nokushisa, ukusebenza okuhle kakhulu kokufakwa kukagesi kanye nokungangenisi kwamakhemikhali amakhulu. Ifanele i-asidi ephilayo kanye nokuhlushwa okuphansi kwe-asidi ye-inorganic, hlanza i-alkali ne-alkali egxilile. Ukungalungi: amandla aphansi wemishini. Ukwelashwa kwe-post vulcanization kuyadingeka.
I-graphite ye-graphite
I-graphite iyikristalu yekhabhoni, iyinto engeyona eyensimbi, umbala ompunga oyisiliva, ikhwalithi ethambile, enokukhanya kwensimbi. Ubulukhuni be-Mohs bungu-1~2, amandla adonsela phansi athile angu-2.2~2.3, futhi ukuminyana kwenqwaba ngokuvamile kungu-1.5~1.8. Inokumelana nokushisa okuphezulu, ukumelana ne-oxidation, ukumelana nokugqwala, ukumelana nokushaqeka okushisayo, amandla aphezulu, ukuqina okuhle, amandla aphezulu okuzigcoba, ukuguquguquka okunamandla okushisayo, ukuqhutshwa kukagesi nezinye izakhiwo eziyingqayizivele zomzimba namakhemikhali. Inokumelana ne-oxidation okukhethekile, i-self-lubricity kanye ne-plasticity ekushiseni okuphezulu, kanye nezakhiwo ezinhle zikagesi, ezishisayo kanye nezokunamathela. Ingasetshenziswa njenge-filler noma i-IMPROver yokusebenza yenjoloba, ipulasitiki kanye nezinto ezihlukahlukene eziyinhlanganisela ukuze kuthuthukiswe ukumelana nokugqokwa, ukumelana nokucindezela noma ukuhanjiswa kwezinto. I-valve gasket, ukupakisha kanye nesihlalo kuvame ukwenziwa ngegraphite.
I-graphite yendawo ephezulu yokuncibilika, ukuya ku-3000 ¡æ ngaphansi kwe-vacuum izoqala ukuthambisa ivame ukuncibilika, i-graphite ehwamukayo ibe yi-sublimation ibe ngu-3600 ¡æ, into evamile ngaphansi kwamandla okushisa aphezulu iyancipha kancane kancane, kuyilapho i-graphite ekushiseni kuya ku-2000 ¡æ, amandla ayo izinga lokushisa elivamile eliphindwe kabili kunalokho, kodwa umehluko wokumelana ne-oxidation wezinga le-graphite oxidation wanda kancane kancane ngezinga lokushisa.
I-conductivity eshisayo kanye ne-electrical conductivity ye-graphite iphakeme kakhulu, i-conductivity yayo iphakeme izikhathi ezi-4 kunensimbi engagqwali, izikhathi ezi-2 ziphakeme kune-carbon steel, izikhathi ezingu-100 ngaphezu kwe-non-metal evamile. I-conductivity yayo eshisayo, hhayi nje kuphela ngaphezu kwensimbi, insimbi, ukuhola nezinye izinto zensimbi, kodwa futhi nokushisa kwandisa ukwehla kwe-thermal conductivity, okuhlukile ezintweni ezijwayelekile zensimbi, ekushiseni okuphezulu kakhulu, i-graphite ijwayele ngisho ne-adiabatic state. Ngakho-ke, ngaphansi kwezimo zokushisa eziphakeme kakhulu, ukusebenza kokufakwa kwe-graphite kunokwethenjelwa kakhulu. I-graphite ine-lubricity enhle ne-plasticity, i-graphite friction coefficient ingaphansi kuka-0.1, i-graphite ingathuthukiswa ibe ishidi lokukhanya elikwazi ukungena, esigabeni sokuqala sobunzima be-graphite bukhulu kakhulu, ngisho namathuluzi wedayimane kunzima ukucubungula. I-graphite inokuqina kwamakhemikhali, ukumelana ne-asidi, ukumelana ne-alkali, ukumelana nokugqwala kwezinyibilikisi zemvelo. Ngenxa yezakhiwo ezinhle kakhulu ezingenhla ze-graphite, ekusetshenzisweni kwezimboni zanamuhla kuya ngokuya kuba kuhle kakhulu.
Imodi yokuxhuma phakathi kwe-actuator kagesi kanye ne-valve ngayinye
I-actuator kagesi ihambisana kakhulu ne-valve, esetshenziswa ohlelweni lokulawula oluzenzakalelayo. Kunezinhlobo eziningi zama-actuator kagesi, ahlukile kumodi yesenzo. Isibonelo, i-angular stroke actuator iyitorque engu-angular ephumayo, kuyilapho i-angular actuator kagesi iwumphumela wokukhipha indawo. Uhlobo lwe-actuator kagesi ohlelweni lokusebenza kufanele lukhethwe ngokuya ngezidingo zomsebenzi we-valve.
Indlela yokuxhumana
I. Ukuxhumeka kwe-Flange:
Lolu uhlobo oluvame kakhulu lokuxhuma olusetshenziswa kuma-valve. Ngokusho kokuma kwendawo ehlangene, ingahlukaniswa ngokulandelayo:
1. Uhlobo olubushelelezi: lusetshenziselwa ama-valve anengcindezi ephansi. Ukucubungula okulula
2, uhlobo lwe-concave kanye ne-convex: ingcindezi ephezulu yokusebenza, ingasetshenziswa ku-washer eqinile
3. Uhlobo lwe-Tenon ne-groove: i-gasket ene-deformation enkulu yepulasitiki ingasetshenziswa emithonjeni ebolayo, futhi umphumela wokuvala ungcono.
4, uhlobo lwe-trapezoidal groove: enendandatho yensimbi eyi-oval njengewasha, esetshenziswa ekucindezelweni kokusebenza kwe-valve engu-64 kg/cm2, noma i-valve yokushisa ephezulu.
I-5, uhlobo lwamalensi: iwasha iyisimo se-lens, esenziwe ngensimbi. Kumavalvu aphezulu OKUCINDEZELEKA ANEMISEBENZI YOKUSEBENZA engu-100 kg/CM2, noma amavalvu okushisa aphezulu.
I-6, uhlobo lwendandatho ye-O: Leli yifomu elisha lokuxhumana le-flange, lakhiwa ngokubukeka kwe-O ring yerabha ehlukahlukene, kumphumela wokuvala wefomu lokuxhuma.
Okwesibili, uxhumano lwentambo:
Lena indlela elula yokuxhuma futhi ivame ukusetshenziswa nama-valve amancane. Kukhona amanye amacala amabili:
1, ukubekwa uphawu okuqondile: imicu yangaphakathi neyangaphandle idlala indima yokubekwa uphawu. Ukuze kuqinisekiswe ukuthi ilunga alivuzi, ngokuvamile namafutha omthofu, i-linoleum kanye ne-PTFE impahla eluhlaza egcwele; Ibhande le-Ptfe impahla eluhlaza, ukusetshenziswa kokuthandwa okwandayo; Le nto inokumelana nokugqwala okuhle, umphumela wokuvala uphawu, kulula ukuyisebenzisa futhi igcinwe, i-disassembly, ingasuswa ngokuphelele, ngoba ifilimu engeyona i-viscous, iphakeme kakhulu kumafutha okuhola, i-linoleum.
2. Ukubekwa uphawu okungaqondile: amandla okuqinisa isikulufu adluliselwa kumshini wokuwasha phakathi kwezindiza ezimbili, ukuze iwasha idlale indima yokuvala.
Okwesithathu, uxhumano lomkhono wekhadi:
Umgomo wokuxhuma kanye nokuvala umkhono wokubopha ukuthi uma inati liqiniswa, umkhono wokubopha ungaphansi kwengcindezi, ukuze unqenqema lwawo lulume odongeni olungaphandle lwepayipi, futhi umkhono wokubopha umkhono wangaphandle wekhoni useduze nekhoni yomzimba ohlangene. ngaphansi kwengcindezi, ngakho-ke ingavimbela ngokuthembekile ukuvuza.
Izinzuzo zalolu hlobo lokuxhuma yilezi:
1, usayizi omncane, isisindo esilula, isakhiwo esilula, ukuhlakazeka okulula;
2, ukuxhumana okuqinile, ukusetshenziswa okubanzi, kungamelana nengcindezi ephezulu (1000 kg/cm2), izinga lokushisa eliphezulu (650¡æ) nokudlidliza
I-3, ingakhetha izinto ezihlukahlukene, ezifanele ukuvimbela ukugqwala;
I-4, izidingo zokunemba komshini aziphezulu; Kulula ukufaka endaweni ephakeme.
Ifomu lokuxhuma lomkhono wokugoqa lisetshenziswe emikhiqizweni emincane yamavalvu e-diameter e-China.
Okwesine, uxhumano lwe-clamp:
Le INDLELA YOKUXHUMANA OKUSHESHAYO IDINGA AMABHUTI AMABILI KUPHELA FUTHI IYAFANELEKELA AMAVAVAVA OKUCINDEZELELA aphansi akhishwa njalo.
Okwesihlanu, ukuxhumana okuziqinisayo kwangaphakathi:
Ngaphezu kwazo zonke izinhlobo zamafomu okuxhumana, ukusetshenziswa kwamandla angaphandle ukuze kuncishiswe ingcindezi ye-medium, ukufeza ukubekwa uphawu. Okulandelayo kuchaza uhlobo lokuxhumana oluziqinisayo usebenzisa ingcindezi ephakathi. Indandatho yayo yokuvala ifakwe ku-cone yangaphakathi, ohlangothini oluphambene oluphakathi lube yi-Angle ethile, ukucindezela okuphakathi ku-cone yangaphakathi, futhi idluliselwe kwendandatho yokuvala, ku-Angle ethile ye-cone surface, ikhiqize izingxenye ezimbili, enye ifana umugqa omaphakathi womzimba we-valve ngaphandle, enye ingcindezi odongeni lwangaphakathi lomzimba we-valve. Ingxenye yokugcina ingamandla aziqinisayo. Uma umfutho ophakathi umkhulu, amandla aziqinisayo abe mkhulu. Ngakho lolu hlobo lokuxhuma lufanelekile kuma-valve aphezulu. Igcina izinto eziningi kanye nomsebenzi kunokuxhumeka kwe-flanged, kodwa futhi idinga inani elithile lokulayisha kuqala, ukuze ukucindezela ku-valve kungabi okuphezulu, ukusetshenziswa okuthembekile. I-valve eyenziwe ngomgomo wokuzivala ngokuziqinisa ngokuvamile i-valve yokucindezela okukhulu.
Kunezinhlobo eziningi zokuxhuma kwe-valve, isibonelo, abanye akudingeki bakhiphe i-valve encane, ehlanganiswe kanye nepayipi; Amanye ama-valve angewona awensimbi, esebenzisa uxhumano lwesokhethi, njalonjalo. Abasebenzisi bevalvu kufanele belashwe ngokwemibandela ethile.