Ukuqonda Izisekelo Zesihlalo Se-Ball Valve
Amavalvu ebholayizinto ezibalulekile zokulawula uketshezi ezenzelwe ukuvula noma ukuvala imigudu yoketshezi ngaphakathi kwamapayipi. Umsebenzi wazo oyinhloko uncike ebholeni elijikelezayo elinembobo. I-torque esetshenziswa ngesiqu (ngokuvamile ukujika kwamadigri angu-90) iqhuba lokhu kuzungeza ukuze kufezwe ukugeleza noma ukuvala. Nokho, ukusebenza kokuvala kunqunywa ngokuyisisekelo ukwakheka kwesihlalo se-valve.
Imiklamo yezihlalo ihlukaniswe ngezigaba ezimbili ngokusekelwe ekuhambeni kwebhola:
1. Isihlalo Esiqinile Esinebhola Elintantayo:Ukucindezela koketshezi kususa ibhola phansi komfula, kuliphoqa ngokuqinile esihlalweni esingezansi komfula, kudala uphawu oluqondiswe ohlangothini olulodwa.
2. Isihlalo Esintantayo Esinebhola Eliqinile:Ibhola lihlala lingashintshi. Ingcindezi yokuvala ikhiqizwa yiziphethu noma ingcindezi yoketshezi esunduza isihlalo (izihlalo) ebholeni ukuze kutholakale ingcindezi ethile yokuvala edingekayo.
Izihlalo ze-Soft Seat Ball Valve
Izihlalo ezithambile zisebenzisa izinto ze-elastomeric noma ze-polymeric ukuze zivale kahle, zinikeza ukuvala okuhle kodwa kunemikhawulo yokushisa/ingcindezi uma kuqhathaniswa nensimbi.
1. Uhlobo Olujwayelekile
Izihlalo ezithambile ezijwayelekile (Isithombe 1) zithola ukuvala ngokuguqulwa kwe-elastoplastic kwezinto zesihlalo uma zicindezelwa ebholeni ngokucindezela kokulayisha kusengaphambili noma koketshezi. Ukuvala okuphumelelayo kuncike ekhonweni lezinto zesihlalo lokubuyisela ukuphambuka kokuyindilinga kwebhola kanye nokungajwayelekile kobuso ngaphansi kwengcindezi. Ukugcina ukuvala okwanele ukucindezela okuthile phakathi kwesihlalo nebhola kubaluleke kakhulu.
2. Uhlobo Lokunwebeka
Izihlalo ezinwebekayo (Isithombe 2) zifaka izinto eziguquguqukayo njengezikheji zensimbi noma iziphethu zekhoyili. Lezi zinto zivumela isihlalo ukuthi siguquke sibe yi-elastic ngaphansi kokulayisha kusengaphambili noma ingcindezi yoketshezi. Lo mklamo ulungisa ngempumelelo imiphumela yokuvala okubangelwa ukushintshashintsha kwezinga lokushisa, izinguquko zengcindezi, kanye nokuguguleka.
(a) Uhlobo Olulodwa Lwe-Bevel
(b) Uhlobo Lwemigqa Emibili Ye-Bevel
(c) Uhlobo Lokuzibopha Ngomugqa We-V
(d) Uhlobo Olukhethekile
3. Uhlobo Oluhlanganisiwe Entwasahlobo
Isimiso esiyinhloko (Umfanekiso 3) sihilela ukusabalalisa ngokulinganayo isethi yezipilingi zokucindezela nxazonke kwesiteshi se-valve, noma ukusebenzisa ipilingi yediski eyodwa. Lokhu kulungiselela kunikeza ukusunduza okuqhubekayo, okuqinisekisa ukuthi isihlalo sigcina ingcindezi engaguquki ngokumelene nebhola ukuze kube nesivalo sokulayisha esithembekile.
(a) Uhlobo Lwentwasahlobo Yokucindezela
(b) Uhlobo Lwentwasahlobo Yediski
4. Isihlalo Sohlobo Lwe-Piston
Izihlalo zepiston (Umfanekiso 4) zisebenzisa ingcindezi ephakathi nendawo yokungena ukuze zenze amandla okuvala. Lokhu kucindezela kusunduza isihlalo esifana nepiston ngokumelene nebhola, okubangela ukuguqulwa kwe-elastoplastic eringini yokuvala ukuze kufinyelelwe ukuvalwa okuqinile.
(a) Isihlalo Esivinjiwe Nokuhlanzwa Komoya (I-Double Block Nokuhlanzwa Komoya – DBB):Iqukethe umklamo wokuphepha oyingqayizivele. Uma ingcindezi yesikhala idlula ingcindezi engezansi komfula, amandla angaphandle anqoba ukumelana kwentwasahlobo, ahlukanise isihlalo nebhola. Lokhu kuvumela ukucindezela ngokweqile emgodini ukuthi kukhiphe umoya phansi komfula. Iziphethu zibe sezibeka kabusha ivalvu lapho ingcindezi ilinganiswa.
(b) Isihlalo Sokunyakaza Okubili:Isebenza lapho ingcindezi yesikhala idlula ingcindezi yokukhipha. Amandla okucindezela esihlalo abangela ukuguqulwa kwe-elastoplastic endandatho yokuvala. Lo mklamo unikeza isinxephezelo esizenzakalelayo; uma uphawu oluphezulu luhluleka, isihlalo esingezansi siyabamba ngokushesha.
(c) Isihlalo Sokuvala Esinezigaba Ezimbili:Yenzelwe imithwalo yokuvala ephezulu. Ihlanganisa irabha (ukuvala okuyinhloko) kanye nepulasitiki (ukusekela kanye nokuvala okwesibili) esakhiweni esihlanganisiwe ukuze kube nokuthembeka okuthuthukisiwe kanye nokuphila isikhathi eside.
5. Izihlalo Zesakhiwo Esikhethekile
Lesi sigaba sihlanganisa imiklamo ehlukahlukene ehlukile eyenzelwe izidingo nezimo ezithile:
(a) Isihlalo Esilungisekayo Ngaphakathi/Ngaphandle
(b) Isihlalo Se-Bellows
(c) Isihlalo Sokufaka Amafutha
(d) Isihlalo Esisebenza Kabili
(e) Isihlalo Esihlanganisiwe
• Isihlalo Esilungisekayo Ngaphakathi:Isebenzisa i-nut yokulungisa yangaphakathi ukulawula ukuvala ingcindezi ethile phakathi kwesihlalo nebhola, okunikeza inzuzo yokungabi namaphuzu okuvuza angaphandle.
• Isihlalo Esilungisekayo Ngaphandle:Isebenzisa ipulaki yesikulufu sangaphandle ukucindezela i-wedge, isusa isikhafu esibonayo ukuze ilungise ingcindezi ethile yokuvala isihlalo nebhola.
• Isihlalo Se-Bellows:Ngokuvamile kushiselwe (i-electron beam noma i-TIG) esihlalweni nasesikhwameni sokuqondisa. Umklamo kumele uqinisekise ukuthi isikhungo sokuvala isihlalo sincane kunobubanzi obuphakathi be-bellows. Inikeza ukuvala okuthembekile, ububanzi obukhulu bokunwebeka, kanye nokuguquguquka kwe-3D.
• Isihlalo Sokufaka Amafutha:Ihlose ukuthuthukisa ukuvala, ukunciphisa ukungqubuzana/ukuguguleka, ukwandisa isikhathi senkonzo, nokuvimbela ukwehluleka kwesihlalo/izehlakalo zomlilo. Iqukethe ama-port okujova amafutha.Qaphela: Ukujova ngamafutha ngokuyinhloko kuyasiza futhi akusebenzi kuwo wonke umuntu.
Isihlalo Esisebenza Kabili: Lapho ikamelo 'N' lithola ingcindezi yokulawula, isihlalo sicindezela ibhola ukuze livalwe. Lapho ikamelo 'M' lithola ingcindezi futhi i-'N' ikhipha umoya, isihlalo siyahoxa, sinciphise ukuthintana, ukuguguleka, ukungqubuzana, kanye ne-torque yokusebenza. Kuhle kakhulu kuma-valve ebhola anomfutho ophezulu/ophakathi, anobubanzi obukhulu.
• Isihlalo Esihlanganisiwe:Ihlanganisa isihlalo esihlanganiswe ngentwasahlobo (uphawu oluyinhloko) nesihlalo sohlobo lwe-piston (esinikeza ukuvalwa okusizayo lapho kusetshenziswa ingcindezi yokulawula).
Izihlalo Zevalvu Yebhola Lesihlalo Sensimbi
Izihlalo ze-Metal Seal Ball Valve zisebenzisa izinto zensimbi noma ezihlanganisiwe ukuze zikwazi ukushisa okuphezulu, ingcindezi, ukuguguleka, kanye nokumelana nokugqwala, ngokuvamile ngezinga lokuvuza eliphakeme kunezivalo ezithambile kodwa ezibalulekile ukuze zisebenze kahle.
1. Isihlalo Sensimbi Esiyisisekelo
Kwenziwe ngokufaka ungqimba lwe-alloy eqinile (isb., i-Stellite, i-Tungsten Carbide) ku-substrate yensimbi ngokushisela (Isithombe 6). Kuhlanganisa isihlalo somsila esinwebekayo ukuze kuncishiswe kakhulu ukungqubuzana kanye nomonakalo ebusweni bokuvala ngesikhathi sokusebenza.
2. Isihlalo Sokuvala Esinezingqimba Eziningi
Yakhiwe ngokubeka amashidi amaningi ensimbi engagqwali kanye namashidi e-graphite amancane ngokushintshana, bese uwagoqa ngaphansi kokucutshungulwa okukhethekile (Isithombe 7). Lesi sakhiwo esiyingqayizivele sinikeza ukusebenza okuhle kakhulu ngaphansi kwamazinga okushisa aphezulu kanye nokucindezeleka.
3. Isihlalo Sokuvala Ishubhu Elingenalutho
Iqukethe ama-bushing angaphakathi nangaphandle ane-core ye-stainless steel tube (Isithombe 8). Ukuvala kuncike emandleni okunwebeka akhiqizwa ukuguqulwa kwe-hollow tube ukuze kucindezelwe isihlalo ngokuqinile ebholeni.
4. Isihlalo Esijikelezayo
Umklamo oyingqayizivele (Isithombe 9) lapho isihlalo sijikeleza khona eduze kwe-axis yesiteshi ngesikhathi sokusebenza kwe-valve. Amazinyo abekwe ngokulinganayo eduze komjikelezo wesihlalo abangela ukuthi isihlalo sijikeleze kancane kancane (ngezinyo elilodwa) isikhathi ngasinye lapho ibhola livala. Lokhu kuqinisekisa ukuguguleka okulinganayo, okwenza ukusebenza kube ngcono futhi kwandise isikhathi senkonzo.
OkubalulekileIzinto Zesihlalo Sevalvu
Izinto Ezikhethekile Ze-Polymer
Inikeza ukuvala okuhle kakhulu, ukungqubuzana okuphansi, kanye nokumelana namakhemikhali ngaphakathi kwemingcele yokushisa/ingcindezi echaziwe.
• I-PTFE (i-Polytetrafluoroethylene – F4):Idume ngokumelana nokushisa/ukubanda okumangalisayo (-250°C kuya ku-+260°C), izakhiwo ezinganamatheli, ukungqubuzana okuphansi (μ~0.05), kanye nokungasebenzi kahle kwamakhemikhali (kumelana nama-asidi aqinile, ama-alkali, ama-oxidizer). Izibambo ~ umthwalo we-5MPa.
• I-PCTFE (i-Polychlorotrifluoroethylene – F3):Inikeza amandla aphezulu, ubulukhuni, ukuzinza kobukhulu, akukho ukugeleza okubandayo. Izinga lokushisa: -195°C kuya ku-+120°C. Imelana nama-asidi ashisayo angaphili, izixazululo/ama-oxidizer kasawoti obandayo, kanye neningi lezinto eziphilayo ku-RT.
• I-FEP (i-Perfluoro(ethylenepropylene) – F46):Ihlanganisa izinga lokushisa elibanzi (-85°C kuya ku-+205°C) nokuzinza kwamakhemikhali okufana ne-PTFE (kumelana nama-acid, ama-alkali, ama-alcohol, ama-ketone). Ukuminyana okumaphakathi, ukuqhuba ukushisa, kanye nokwanda.
• I-Polyamide (i-Nylon 1010 – N1010):Amandla aphezulu okudonseka, ukuqina komthelela, ukumelana nokuklwebheka, kanye nokuzigcoba ku-RT. Ukuklwebheka okuphansi (μ~0.03), ubuningi ~1.5g/cm³. Kumelana nama-acid/ama-alkali abuthakathaka, izinyibilikisi ezijwayelekile, namafutha.
• I-PPL (i-Para Poly Phenylene):Iphumelela kakhulu ekumelaneni nokushisa okuphezulu, ukumelana nokugqwala kwamakhemikhali, ukuzigcoba. Ubuningi ~2g/cm³, ukwanda ~5.1×10⁻⁵/°C, ubulukhuni ~80HS. Imelana ne-sulfuric acid, i-HF, ama-alkali aqinile. Ukumelana okuhle kakhulu nemisebe, ukungqubuzana μ~0.13.
• HLOLA (i-Polyetheretherketone):Ihlanganisa ukuqina kokushisa/i-chemist okufana ne-thermoset kanye nokucutshungulwa kwe-thermoplastic. Ukusetshenziswa okuqhubekayo >240°C (kufika ku-300°C kugcwele ingilazi). Imelana nezincibilikisi eziningi ezingaphili kanye nokuchayeka isikhathi eside kumusi (200-260°C).
• I-PI (i-Polyimide):Ipulasitiki esezingeni eliphezulu lokushisa eliphezulu yokusetshenziswa komoya isikhathi eside (-240°C kuya ku-+260°C). Ukushisa okuhle kakhulu kukagesi, ukumelana nokuguguleka, ukumelana nemisebe, kanye nezakhiwo zemishini. Imelana nokunciphisa ama-asidi/izinyibilikisi eziphilayo ku-RT. Gwema ama-oxidizer/ama-asidi aqinile kanye nokucwiliswa emanzini isikhathi eside.
Izinto Zokuvala Insimbi
Kukhethwe ngenxa yezimo ezimbi kakhulu: ubulukhuni obuphezulu, umehluko ofanele wobulukhuni phakathi kobuso, ukumelana okuthuthukisiwe kokuguguleka ngokuqinisa ubuso.
• Ama-alloy Aqinile Asekelwe ku-Chromium (isb., i-Stellite)
• Ama-alloy Aqinile Asekelwe ku-Cobalt (isb., i-Tribaloy)
• Ama-Nickel Alloys (isib., i-Inconel, i-Hastelloy)
• I-Tungsten Carbide (WC)
• Izinsimbi Ezingagqwali (isb., 316, 17-4PH, 440C – ezivame ukuqina) (Bheka Ithebula 1 ukuze uqhathanise)
Isiphetho: Izinto Ezibalulekile Okufanele Uzicabangele Ngezihlalo Nezimbozo Ze-Ball Valve
• Indandatho Yokuvala:Kumelwe kubonise ukuzinza okuphezulu, i-coefficient ephansi yokungqubuzana, ukumelana okuhle kakhulu nokuguga, kanye nokusebenza okuhle kakhulu kokuvala.
• Isihlalo Sevalvu:Kudinga amandla anele nokuqina. Ukwakheka kwesikhala kubalulekile ukuze kulondolozwe ukuma ngaphansi kwengcindezi. Kumelwe kumelane nokuguquguquka.
• Izihlalo Zensimbi:Kumelwe kusebenze kahle kakhulu ezindaweni ezibucayi: izinga lokushisa eliphezulu, umfutho ophezulu, ukugqwala okunamandla, izimo ezibangela ukuvuza. Izidingo ezibalulekile zifaka phakathi ukuvuza okucishe kube yi-zero, impilo ende yesevisi, isitifiketi sokuphepha komlilo (I-API 607/6FA), kanye nokumelana okuvelele kokucindezela/ukuguguleka.
Hlola i-PremiumI-Ball ValveIzixazululo Zenzelwe Izinhlelo Zakho Ezinzima Kakhulu.
Isikhathi sokuthunyelwe: Julayi-12-2025