Stainless hlau sab nraud xov koob li qub, raws li cov ntsiab lus tseem ceeb hauv kev tswj cov kua dej, lawv cov kev xaiv muaj txiaj ntsig ncaj qha cuam tshuam rau kev ruaj ntseg thiab kev nyab xeeb ntawm kev ua haujlwm. Hauv siab -kev tswj xyuas qhov tseeb xws li petrochemical, lub zog hluav taws xob, thiab cov khoom siv kho mob, cov li qub no yuav tsum tau ua kom tau raws li ntau yam kev xav tau suav nrog kev ua haujlwm siab, tiv thaiv corrosion, thiab kev tswj xyuas meej. Kab lus no, raws li kev xyaum ua haujlwm engineering thiab cov qauv kev lag luam, tau txheeb xyuas yim lub ntsiab lus tseem ceeb rau kev xaiv stainless hlau sab nraud xov koob li qub.
I.Media yam ntxwv compatibility
1.1 Corrosive nruab nrab teb
Nyob rau hauv muaj zog corrosive tej yam kev mob xws li hydrochloric acid thiab sulfuric acid, 316L stainless hlau los yog duplex steel valve lub cev yuav tsum tau ua ntej. Piv txwv li, nyob rau hauv ib tug 20% hydrochloric acid tsheb thauj mus los system ntawm ib tug tej yam kev lag luam tshuaj, ib tug 316L stainless hlau koob valve nrog ib tug PTFE sealing nplhaib tau siv. Tom qab 2000 teev ntawm kev ntsuas kev ua haujlwm tas mus li, lub rooj zaum lub rooj vag yog ib txwm tsawg dua 0.1 ml / min. Rau cov xov xwm uas muaj chloride ions, tshwj xeeb yuav tsum tau them nyiaj rau qhov kev pheej hmoo ntawm pitting corrosion. Nws raug nquahu kom xaiv ultra- qis carbon stainless hlau lossis hlau alloy nrog ntxiv molybdenum.
1.2 Kev tuav cov xov xwm uas muaj cov khoom
Thaum cov khoom nruab nrab muaj cov khoom siv, cov khoom siv hluav taws xob ceramic lossis cov khoom siv tawv tawv sealing yuav tsum raug xaiv. Nyob rau hauv cov txheej txheem ntxhia ntawm ib lub tuam txhab mining, ib rab koob valve nrog zirconia ceramic valve core tau siv. Raws li qhov xwm txheej ntawm qhov loj me me tsawg dua lossis sib npaug li 0.5 hli, lub rooj zaum lub rooj zaum tau txo los ntawm 82% piv nrog cov tub ntxhais stainless hlau zoo tib yam, thiab lub neej kev pabcuam tau txuas ntxiv mus rau 18 lub hlis.
1.3 Kev tiv thaiv qis -kub media
Nyob rau hauv ultra- qhov kub thiab txias qis dua -70 degree, lub caj dab ntev valve npog yuav tsum tau teeb tsa. Nyob rau hauv ib txoj haujlwm LNG txais qhov chaw nres tsheb, ib rab koob valve nrog lub hau npog txuas ntxiv tau siv, tiv thaiv lub zog txias los ntawm kev ua rau lub valve qia sealing ib feem. Tom qab ntsuas -196℃kua nitrogen, tsis muaj dej khov rau ntawm lub pob valve.
II. Lub hauv paus ntsiab lus ntawm kev sib tw siab
2.1 Siab ntau txhais
Raws li ASME B16.34 tus qauv, cov qib siab ntawm stainless hlau sab nraud xov koob li qub npog PN2.5 rau PN32MPa. Hauv 70MPa ultra-kev ntsuas siab ntawm chav tsev refinery, rab koob valve nrog kev sib txuas ferrule ua tiav 5000 qhib thiab kaw lub voj voog, thiab lub sealing nto indentation qhov tob yog tsawg dua los yog sib npaug rau 0.02mm, ua tau raws li tus qauv xoom to.
2.2 Kev xaiv txoj kev sib txuas
Threaded kev twb kev txuas:haum rau me me txoj kab uas hla tsis tshua muaj -cov tshuab siab nrog DN Tsawg dua lossis sib npaug li 25. Thaum txhim kho, PTFE raw daim kab xev yuav tsum tau siv rau kev sib khi, thiab lub zog yuav tsum tswj ntawm 80% - 90% ntawm tus nqi teev.
Ferrule kev twb kev txuas:ua tau zoo nyob rau hauv nruab nrab thiab siab -siab tshuab nrog DN15 - DN50. Nyob rau hauv ib qhov project nuclear fais fab nroj tsuag, ib rab koob valve nrog ob lub ferrule qauv tau siv. Tom qab 1.5 lub sij hawm ntsuas qhov ntsuas siab tawg, lub nplhaib ferrule tsis muaj kev hloov pauv axial.
Vuam kev twb kev txuas:pom zoo rau siab -siab tshuab nrog DN Ntau dua los yog sib npaug rau 50. Nws yog ib qho tsim nyog los xyuas kom meej tias lub vuam zawj lub kaum ntse ntse ua tau raws li GB / T 985.1 tus qauv, thiab 100% radiographic kuaj yuav tsum tau ua tom qab vuam.
III. Kub Adaptability Design
3.1 Kev tswj hwm ntawm qhov siab - qhov kub thiab txias
Nyob rau hauv siab - qhov kub thiab txias ib puag ncig mus txog tsawg dua los yog sib npaug li 570 degree, hlau hard sealing qauv yuav tsum tau xaiv. Nyob rau hauv lub ntsiab chav tsev ntawm ib tug tej yam thermal fais fab nroj tsuag, ib rab koob valve nrog ib tug 12Cr1MoV alloy steel valve lub cev thiab ib tug Stellite alloy sealing nto tau siv. Tom qab 540℃siab- ntsuas kev ua haujlwm kub, qhov thermal expansion coefficient tau zoo, thiab lub valve qia jamming tus nqi tsawg dua 0.3%.
3.2 Kev xaiv cov khoom siv rau qis - qhov kub thiab txias
Rau tej yam kev mob hauv qab no -70 degree, austenitic stainless hlau los yog npib tsib xee alloys yuav tsum tau xaiv. Nyob rau hauv hydraulic system ntawm ib tug tej yam polar tshawb fawb nkoj, ib rab koob valve nrog ib tug Inconel 718 alloy valve lub cev tau siv. Ntawm -85 degree, lub zog tawm los yog ntau dua lossis sib npaug rau 1030MPa, ua tau raws li qhov yuav tsum tau ua ntawm kev ua haujlwm ntawm lub ncov qaumteb qabteb.
IV. Flow Control yam ntxwv
4.1 Precision kev cai yuav tsum
Rau cov tshuab uas muaj kev tswj xyuas qhov tseeb yuav tsum tau tsawg dua lossis sib npaug li ± 1%, V- zoo li qhib tswj koob li qub yuav tsum raug xaiv. Nyob rau hauv cov roj tis system ntawm ib tug tej yam semiconductor manufacturing enterprise, ib tug cab iav tsav regulating koob valve tau siv, ua tiav ib tug linear kev cai los ntawm 0.5L / min rau 5L / min, nrog ib tug rov positioning raug ntawm 0.05mm.
4.2 ceev qhib thiab kaw daim ntawv thov
Hauv kev txiav thaum muaj xwm txheej ceev -tawm qhov xwm txheej, pneumatic lossis hluav taws xob actuators yuav tsum tau teeb tsa. Cov txheej txheem kev nyab xeeb ntawm qee qhov chaw ua lag luam tshuaj siv lub caij nplooj ntoos hlav- rov qab pneumatic koob li qub nrog lub sij hawm teb tsawg dua lossis sib npaug li 0.3 vib nas this, ua tau raws li SIL3 kev ruaj ntseg kev ntseeg siab.
V. Optimization ntawm Sealing Structure
5.1 Kev xaiv cov ntaub ntawv mos sealing
Polytetrafluoroethylene (PTFE):Haum rau kev ua haujlwm ib txwm ua txij li -20℃txog +200℃. CIP tu system ntawm ib qho kev lag luam ua zaub mov siv PTFE-sealed koob li qub, thiab tom qab 500 chav tshuaj tua kab mob, lub sealing nto qhia tsis muaj deformation.
Perfluoroelastomer (FFKM):Ua tau zoo nyob rau hauv siab -cov roj kub txog li 260℃. Ib co aviation lubrication system siv FFKM- kaw koob li qub, nrog rau compression teem tus nqi tsawg dua los yog sib npaug rau 8%. 5.2 Hlau sealing tsim Rau siab- siab thiab siab - kub, ib tug hlau - rau - hlau sealing qauv yog pom zoo. Ib lub zog hluav taws xob supercritical thermal siv lub conical nyuaj- kaw lub koob valve, thiab tom qab kev ntsuas siab 42MPa, tus nqi xau raws li ANSI Class
VI standard.
6.1 Installation kev taw qhia tswj
Nws yog ib qho tseem ceeb los xyuas kom meej tias qhov nruab nrab ntws kev taw qhia yog ua raws li tus xub ntawm lub valve lub cev. Ib qho chaw nres tsheb roj nkev metering tau ntsib qhov kev cuam tshuam ntawm cov tub ntxhais valve vim rov qab kev teeb tsa. Tom qab txhim kho nws nyob rau hauv qhov tseeb, lub neej kev pab cuam tau ncua ntawm 3 lub hlis mus rau 2 xyoo.
6.2 Cov ntsiab lus saib xyuas tsis tu ncua
Sealing nto sib tsoo:Daim iav sib tsoo yuav tsum tau txhua txhua 2000 teev, nrog rau qhov roughness ntawm Ra tsawg dua los yog sib npaug rau 0.2μm.
Packing hloov:Graphite packing yuav tsum tau hloov txhua 5000 teev, thiab PTFE ntim txhua 3000 teev.
Kev tu thiab tu:Lub valve kab noj hniav yuav tsum tau ntxuav nrog 95% cawv txhua hli kom tsis txhob muaj cov crystallization nruab nrab thiab txhaws.
VII. Kev lag luam daim ntawv thov Customization
7.1 Kev lag luam roj thiab roj
Hauv kev ua haujlwm ntev -qhov deb ntawm lub raj xa dej, tag nrho - welded koob li qub tau pom zoo. Ib qho West-East Gas Transmission Project siv DN50 tag nrho-welded koob li qub, thiab tom qab 10MPa siab ntsuas, lub valve lub cev qhia tias tsis muaj deformation, thiab cov cuab yeej pigging kis tau zoo.
7.2 Kev lag luam khoom siv kho mob
Cov tshuab lim ntshav xav tau 316L kev kho mob- qib stainless hlau koob li qub nrog qhov roughness ntawm Ra tsawg dua lossis sib npaug li 0.4μm. Ib lub chaw tsim khoom siv tshuab lim ntshav siv rab koob li qub kho nrog electrolytic polishing, thiab tom qab kuaj biocompatibility, lawv ua tau raws li ISO 10993 tus qauv.
7.3 Nuclear fais fab kev lag luam
Nuclear- qib koob li qub yuav tsum ua tau raws li RCC-M tus qauv, nrog rau cov khoom siv lub cev lub cev muaj zog irradiation ntau dua lossis sib npaug li 10^7Gy. Ib qho tshwj xeeb nuclear fais fab nroj tsuag cov tshuaj tua kab siv 304L stainless hlau koob li qub, thiab tom qab kev soj ntsuam lub neej 40 xyoo, cov khoom siv degradation vim neutron irradiation tsawg dua los yog sib npaug li 5%.
VIII. Xaiv Kev Txiav Txim Ntoo
xaiv nruab nrab tsom xam:Txiav txim siab tsis xws li corrosiveness, kub, thiab particle loj.
Kev ntsuas siab:Xaiv PN qib raws li kev ua haujlwm siab tshaj plaws ntawm lub kaw lus.
Kev ntsuas kub:Ua haujlwm qhov kub thiab txias ntawm lub valve lub cev / cov khoom sib khi.
Flow thov:Txiav txim siab seb puas yuav siv cov kev tswj hwm lossis ntawm -off valve.
Txoj kev sib txuas:Xaiv cov xov, ferrule, lossis vuam raws li cov yeeb nkab txoj kab uas hla thiab siab.
Cov qauv kev lag luam:Ua raws li cov qauv tshwj xeeb rau thaj chaw xws li roj thiab roj thiab hluav taws xob nuclear.
Kev ntsuam xyuas nyiaj txiag:Optimize tus nqi yuav khoom raws li qhov ua tau raws li qhov yuav tsum tau ua.
Xaus
Kev xaiv ntawm stainless hlau threaded koob li qub yog ib qhov systematic project uas yuav tsum muaj kev xav txog cov yam ntxwv nruab nrab, siab thiab kub, tswj qhov tseeb, thiab lwm yam tseem ceeb tsis. Los ntawm kev xaiv kev tshawb fawb thiab kev saib xyuas tus qauv, qee yam kev lag luam tshuaj tau txo qis valve tsis ua haujlwm los ntawm qhov nruab nrab ntawm 12 zaug hauv ib xyoos mus rau 3 zaug, ncaj qha txo tus nqi txij nkawm los ntawm 47%. Nws raug nquahu kom cov neeg siv tsim kom muaj kev tswj hwm lub neej tag nrho rau cov li qub kom ua tiav kev kaw - kev tswj lub voj voog los ntawm kev xaiv thiab kev yuav khoom mus rau kev tshem tawm thiab hloov pauv.