Cov kua hydrogen muaj qee qhov zoo hauv kev khaws cia thiab kev thauj mus los. Piv nrog rau hydrogen, kua hydrogen (LH2) muaj qhov ceev dua thiab yuav tsum tau qis dua rau kev cia. Txawm li cas los xij, hydrogen yuav tsum yog -253 ° C kom ua kua, uas txhais tau hais tias nws nyuaj heev. Cov kub tsis tshua muaj kub thiab qhov phom sij txaus ntshai ua rau cov kua hydrogen yog qhov nruab nrab txaus ntshai. Vim li no, kev ntsuas kev nyab xeeb nruj thiab kev ntseeg siab yog qhov yuav tsum tsis muaj kev cuam tshuam thaum tsim cov khoom siv rau cov kev siv cuam tshuam.
Los ntawm Fadila Khelfaoui, Frédéric Blanquet
Velan Valve (zeeg)
Kev siv cov kua hydrogen (LH2).
Tam sim no, kua hydrogen yog siv thiab sim siv rau ntau lub sijhawm tshwj xeeb. Hauv aerospace, nws tuaj yeem siv los ua lub foob pob hluav taws tso roj thiab tseem tuaj yeem tsim cov kev poob siab hauv cov cua tshuab transonic. Rov qab los ntawm "kev tshawb fawb loj," kua hydrogen tau dhau los ua cov khoom siv tseem ceeb hauv cov tshuab hluav taws xob superconducting, particle accelerators, thiab cov khoom siv nuclear fusion. Raws li tib neeg lub siab xav kom muaj kev loj hlob zuj zus, cov kua hydrogen tau siv los ua roj los ntawm ntau thiab ntau lub tsheb thauj khoom thiab nkoj hauv xyoo tas los. Nyob rau hauv daim ntawv thov scenarios saum toj no, qhov tseem ceeb ntawm li qub yog pom tseeb heev. Kev nyab xeeb thiab txhim khu kev lag luam ntawm li qub yog ib feem tseem ceeb ntawm cov kua dej hydrogen cov saw ecosystem (tsim, tsheb thauj mus los, khaws cia thiab xa tawm). Kev ua haujlwm cuam tshuam nrog kua hydrogen yog qhov nyuaj. Nrog rau ntau tshaj 30 xyoo ntawm kev ua tau zoo thiab kev txawj ntse hauv kev ua haujlwm siab li qub mus rau -272 ° C, Velan tau koom nrog ntau yam haujlwm tshiab rau lub sijhawm ntev, thiab nws yog qhov tseeb tias nws tau yeej qhov kev sib tw ntawm kua hydrogen kev pab cuam nrog nws lub zog.
Kev sib tw hauv theem tsim
Lub siab, qhov kub thiab txias thiab hydrogen concentration yog txhua yam tseem ceeb uas tau tshuaj xyuas hauv qhov kev ntsuam xyuas kev pheej hmoo ntawm lub valve. Txhawm rau txhim kho qhov kev ua tau zoo ntawm lub valve, tsim thiab xaiv cov khoom siv ua lub luag haujlwm txiav txim siab. Valves siv nyob rau hauv cov kua hydrogen daim ntawv thov ntsib cov kev cov nyom ntxiv, nrog rau cov teebmeem ntawm hydrogen ntawm hlau. Ntawm qhov kub thiab txias, cov ntaub ntawv valve yuav tsum tsis tsuas yog tiv thaiv kev tawm tsam ntawm hydrogen molecules (qee qhov cuam tshuam kev cuam tshuam cov txheej txheem tseem sib cav hauv kev kawm), tab sis kuj yuav tsum muaj kev ua haujlwm ib txwm ua rau lub sijhawm ntev ntawm lawv lub neej. Raws li cov theem tam sim no ntawm kev txhim kho thev naus laus zis, kev lag luam tsis muaj kev paub txog kev siv cov ntaub ntawv tsis yog xim hlau hauv kev siv hydrogen. Thaum xaiv cov khoom sib khi, nws yog ib qho tsim nyog yuav tsum coj qhov no mus rau hauv tus account. Kev sib khi zoo kuj yog qhov tseem ceeb ntawm kev tsim qauv kev ua tau zoo. Muaj qhov sib txawv ntawm qhov kub ntawm yuav luag 300 ° C ntawm cov kua hydrogen thiab ambient kub (chav kub), uas ua rau qhov kub thiab txias gradient. Txhua feem ntawm lub valve yuav raug sib txawv ntawm cov thermal expansion thiab contraction. Qhov tsis sib xws no tuaj yeem ua rau muaj kev phom sij ntawm qhov tseem ceeb sealing nto. Lub sealing nruj ntawm lub valve qia kuj yog lub hom phiaj ntawm kev tsim. Kev hloov ntawm qhov txias mus rau kub ua kom sov txaus. Kub qhov chaw ntawm lub kaus mom kab noj hniav hauv cheeb tsam yuav khov, uas tuaj yeem cuam tshuam qia sealing kev ua tau zoo thiab cuam tshuam rau kev ua haujlwm ntawm lub valve. Tsis tas li ntawd, qhov kub tsis tshua muaj siab ntawm -253 ° C txhais tau hais tias cov cuab yeej rwb thaiv tsev zoo tshaj plaws yuav tsum tau ua kom ntseeg tau tias lub valve tuaj yeem tswj tau cov kua hydrogen ntawm qhov kub ntawm qhov kub no thaum txo qis los ntawm qhov kub. Tsuav yog muaj cua sov xa mus rau cov kua hydrogen, nws yuav evaporate thiab xau. Tsis tas li ntawd, oxygen condensation tshwm sim ntawm qhov tawg ntawm qhov rwb thaiv tsev. Thaum cov pa oxygen los rau hauv kev sib cuag nrog hydrogen los yog lwm yam combustibles, qhov kev pheej hmoo ntawm hluav taws yuav nce. Yog li ntawd, xav txog kev pheej hmoo hluav taws kub uas cov li qub yuav ntsib, cov li qub yuav tsum tau tsim nrog cov ntaub ntawv pov thawj tawg hauv siab, nrog rau cov hluav taws kub-resistant actuators, instrumentation thiab cables, tag nrho nrog cov ntawv pov thawj nruj tshaj plaws. Qhov no ua kom lub valve ua haujlwm zoo thaum muaj hluav taws kub. Kev kub siab ntxiv kuj yog qhov muaj feem pheej hmoo uas tuaj yeem ua rau lub valve tsis ua haujlwm. Yog tias cov kua hydrogen nyob rau hauv cov kab noj hniav ntawm lub valve lub cev thiab hloov cov cua sov thiab cov kua hydrogen evaporation tshwm sim tib lub sijhawm, nws yuav ua rau muaj kev nce siab. Yog tias muaj qhov sib txawv loj, cavitation (cavitation) / suab nrov tshwm sim. Cov xwm txheej no tuaj yeem ua rau qhov kawg ntawm lub neej ua haujlwm ntawm lub valve, thiab txawm tias raug kev puas tsuaj loj vim cov txheej txheem tsis raug. Txawm hais tias qhov kev ua haujlwm tshwj xeeb, yog tias cov xwm txheej saum toj no tuaj yeem txiav txim siab tag nrho thiab cov kev tiv thaiv zoo tuaj yeem raug coj mus rau hauv tus txheej txheem tsim, nws tuaj yeem ua kom muaj kev nyab xeeb thiab txhim khu kev lag luam ntawm lub valve. Tsis tas li ntawd, muaj kev sib tw tsim muaj feem cuam tshuam txog tej teeb meem ib puag ncig, xws li fugitive to. Hydrogen yog tshwj xeeb: me me molecules, tsis muaj xim, tsis muaj ntxhiab, thiab tawg. Cov yam ntxwv no txiav txim siab qhov tsim nyog ntawm xoom xau.
Ntawm North Las Vegas West Coast Hydrogen Liquefaction chaw nres tsheb,
Wieland Valve engineers tab tom muab kev pabcuam
Valve kev daws teeb meem
Txawm hais tias qhov tshwj xeeb muaj nuj nqi thiab hom, li qub rau txhua daim ntawv thov hydrogen kua yuav tsum ua tau raws li qee qhov kev xav tau. Cov kev cai no suav nrog: cov khoom siv ntawm cov txheej txheem yuav tsum xyuas kom meej tias cov txheej txheem kev ruaj ntseg ntawm qhov kub tsis tshua muaj siab; Txhua yam khoom siv yuav tsum muaj cov khoom siv hluav taws xob zoo. Rau tib lub laj thawj, cov khoom sib khi thiab ntim cov kua hydrogen li qub yuav tsum ua kom tau raws li cov cai hauv qab no. Austenitic stainless hlau yog cov khoom siv zoo tshaj plaws rau cov kua hydrogen li qub. Nws muaj kev cuam tshuam zoo zog, tsawg tshav kub poob, thiab tuaj yeem tiv taus qhov kub thiab txias gradients. Muaj lwm cov ntaub ntawv uas tseem tsim nyog rau cov kua dej hydrogen, tab sis tsuas yog txwv rau cov txheej txheem tshwj xeeb. Ntxiv rau qhov kev xaiv ntawm cov ntaub ntawv, qee qhov kev tsim cov ntsiab lus yuav tsum tsis txhob saib xyuas, xws li txuas lub valve qia thiab siv lub tshuab cua los tiv thaiv cov ntim ntim los ntawm qhov kub thiab txias. Tsis tas li ntawd, qhov txuas ntxiv ntawm lub qia valve tuaj yeem nruab nrog lub nplhaib rwb thaiv tsev kom tsis txhob muaj qhov hws. Tsim cov li qub raws li kev thov tshwj xeeb pab muab cov kev daws teeb meem tsim nyog rau cov kev sib tw sib txawv. Vellan muab npauj npaim li qub hauv ob qhov kev tsim qauv: ob chav eccentric thiab triple eccentric hlau rooj npauj npaim li qub. Ob qho qauv tsim muaj peev xwm ua tau bidirectional ntws. Los ntawm kev tsim cov duab disc thiab kev sib hloov trajectory, lub kaw ntom ntom tuaj yeem ua tiav. Tsis muaj kab noj hniav hauv lub cev valve uas tsis muaj qhov nruab nrab seem. Nyob rau hauv rooj plaub ntawm Velan ob chav eccentric npauj npaim valve, nws siv lub disc eccentric rotation tsim, ua ke nrog qhov txawv VELFLEX sealing system, kom ua tau zoo valve sealing kev ua tau zoo. Qhov kev tsim patented no tuaj yeem tiv taus txawm tias qhov kub hloov pauv loj hauv lub valve. Lub TORQSEAL triple eccentric disc kuj muaj qhov tshwj xeeb tsim kev sib hloov trajectory uas pab xyuas kom meej tias cov disc sealing nto tsuas yog kov lub rooj zaum ntawm lub sijhawm mus txog qhov chaw kaw thiab tsis khawb. Yog li ntawd, lub kaw torque ntawm lub valve tuaj yeem tsav lub disc kom ua tau raws li qhov chaw zaum, thiab tsim kom muaj qhov cuam tshuam txaus nyob rau hauv qhov chaw kaw lub valve, thaum ua rau lub disc sib npaug sib npaug nrog tag nrho cov voj voog ntawm lub rooj zaum sealing nto. Kev ua raws li lub rooj zaum valve tso cai rau lub valve lub cev thiab disc kom muaj "kev hloov kho tus kheej" ua haujlwm, yog li zam kev qaug dab peg ntawm lub disc thaum kub hloov pauv. Lub zog stainless hlau valve ncej muaj peev xwm ua haujlwm siab thiab ua haujlwm zoo ntawm qhov kub thiab txias. VELFLEX ob chav eccentric tsim tso cai rau lub valve yuav tsum tau muab kev pab online sai thiab yooj yim. Ua tsaug rau sab vaj tse, lub rooj zaum thiab disc tuaj yeem kuaj xyuas lossis muab kev pabcuam ncaj qha, tsis tas yuav tsum tau disassemble lub actuator lossis cov cuab yeej tshwj xeeb.
Tiv tauj peb - Tianjin Tanggu Water-Seal Valve Co., Ltdyog txhawb nqa cov cuab yeej ua haujlwm siab heev resilient seated li qub, nrog rau cov rooj zaum resilientwafer npauj npaim valve, Npauj npaim valve, Ob chav flange concentric npauj npaim valve, Ob chav flange eccentric npauj npaim valve,Y- lim, ntsuas valve,Wafer dual phaj check valve, lwm.
Post lub sij hawm: Aug-11-2023
