Qhov Kub thiab Txias Uas Tsis Kub Muaj Feem Cuam Tshuam Li Cas Rau Cov Khoom Siv Argon Gas Siab Siab?

 

 

Hauv thaj chaw ntawm kev siv cryogenic, argon ua lub luag haujlwm tseem ceeb vim nws cov khoom inert, ua rau nws tsis tseem ceeb hauv kev lag luam xws li aerospace, kev kho mob duab, vuam, thiab kev tsim khoom semiconductor. Cov kua argon, khaws cia ntawm qhov kub ntawm -186 ° C (-303 ° F), feem ntau yog vaporized rau kev siv hauv daim ntawv gaseous, xav tau kev tswj hwm qhov siab kom meej kom ntseeg tau tias muaj kev nyab xeeb thiab ua haujlwm tau zoo. High-pressure argon roj regulators yog cov khoom tseem ceeb hauv cov kab ke no, tswj cov dej ntws thiab lub siab los ntawm cov thoob dej cia khoom lossis cov thooj voos kheej kheej los ntawm cov vaporizers mus rau qhov chaw siv kawg. Cov regulators no yuav tsum ua haujlwm tau zoo hauv qhov chaw kub heev, qhov twg qhov kub tuaj yeem poob rau qib cryogenic, ua rau muaj kev cov nyom loj rau lawv cov khoom sab hauv.

 

Lub plawv ntawm kev ua haujlwm ntawm lub tshuab tswj yog cov ntsaws ruaj ruaj thiab cov diaphragms, uas tswj tau qhov siab thiab teb rau qhov hloov pauv. Cov ntsaws ruaj ruaj tiv thaiv kev xau ntawm thaj chaw siab thiab qis, thaum cov diaphragms ua haujlwm ua cov khoom siv sensing, kho qhov orifice valve kom ruaj khov qhov siab tawm. Txawm li cas los xij, qhov kub qis cuam tshuam rau cov khoom no, ua rau cov khoom puas tsuaj, poob qhov yooj ywm, thiab ua rau lub cev tsis ua haujlwm. Tsab xov xwm no tshawb nrhiav seb qhov kev ua haujlwm kub qis ntawm cov ntsaws ruaj ruaj thiab diaphragms cuam tshuam li cas rau kev ua haujlwm ntawm lub tshuab tswj hauv cov teeb tsa cryogenic argon, xws li cov kua argon vaporization systems. Nws kuj tshawb nrhiav txog cov khoom siv tseem ceeb thiab kev hloov kho tsim los txo cov teebmeem no, kos duab los ntawm cov ntsiab cai engineering thiab kev coj ua hauv kev lag luam kom ntseeg tau tias kev ua haujlwm txhim khu kev qha. Kev nkag siab txog cov yam no yog qhov tseem ceeb rau kev tiv thaiv kev phom sij kev nyab xeeb xws li roj xau, kev tsis ruaj khov ntawm lub siab, lossis cov khoom siv tsis ua haujlwm, uas tuaj yeem muaj kev puas tsuaj loj heev hauv cov chaw muaj kev pheej hmoo siab.

 

Cov kev sib tham no yog hais txog lub hauv paus ntawm cov khoom siv cryogenic thiab cov kev siv hauv ntiaj teb tiag tiag, qhia txog vim li cas cov neeg tswj hwm tus qauv tsis ua haujlwm zoo hauv cov xwm txheej txias thiab kev hloov kho tshwj xeeb ua rau muaj kev ua tau zoo li cas. Los ntawm kev daws cov teeb meem no, cov engineers tuaj yeem ua kom zoo dua cov kab ke kom ua haujlwm tau zoo, ua haujlwm ntev, thiab muaj kev nyab xeeb.

 

Keeb kwm ntawm High-Pressure Argon Gas Regulators nyob rau hauv Cryogenic Ib puag ncig

Cov txheej txheem ua kua argon vaporization piv txwv txog kev tsim kho cryogenic, qhov twg argon khaws cia ua kua hauv cov thoob dej lossis lub tog raj kheej kom txo qhov chaw thiab ua kom zoo tshaj plaws kev thauj mus los. Vaporization tshwm sim los ntawm cov cua sov hloov pauv lossis cov cua sov hauv ib puag ncig, hloov cov kua mus rau roj rau kev faib tawm. Cov tswj hwm siab siab yog qhov tseem ceeb ntawm no, nyob rau hauv qab ntawm cov vaporizers lossis ncaj qha rau ntawm lub tog raj kheej kom txo cov siab nkag (feem ntau txog li 550 psig) rau cov qib tawm siv tau (piv txwv li, 25-350 psig). Cov khoom siv no tswj cov siab sib xws txawm tias muaj kev thov sib txawv, tiv thaiv kev siab dhau uas tuaj yeem tawg cov kab lossis kev siab tsis txaus uas ua rau cov txheej txheem tsis ua haujlwm.

 

Hauv cov chaw teeb tsa cryogenic, cov neeg tswj hwm ntsib ob qho teeb meem: kev tswj cov pa roj txias tom qab ua pa thiab qhov muaj peev xwm raug kua argon ncaj qha thaum lub sijhawm siab. Piv txwv li, hauv cov txheej txheem khaws cia ntau, lub kauj siab ua kom cov kua ua pa kom tswj tau qhov siab ntawm lub tank, pub rau hauv cov neeg tswj hwm. Cov neeg tswj hwm Economizer, zoo li cov hauv RG lossis ECL series, hloov pauv ntawm cov kua thiab cov roj rho tawm kom zoo dua qub thiab txo qhov poob ntawm cov pa tawm. Cov txheej txheem no ua haujlwm ntawm qhov kub qis li -320 ° F, qhov twg cov khoom siv txheem tawg thiab ua tsis tiav.

 

Cov hom tswj hwm muaj xws li ua haujlwm ncaj qha (siv cov diaphragms rau kev ntsuas siab) thiab dome-loaded (rau kev tswj hwm qhov tseeb hauv cov dej ntws hloov pauv). Hauv kev siv argon, lawv yuav tsum ua raws li cov qauv zoo li CGA G-4.1 rau kev ntxuav oxygen-compatible, txawm tias argon yog inert, kom tsis txhob muaj kev pheej hmoo ntawm kev ua qias tuaj. Qhov cuam tshuam Joule-Thomson ua rau muaj teeb meem nyuaj ntxiv, vim tias cov roj nthuav dav los ntawm lub tswj hwm ua rau txias ntxiv, tej zaum yuav ua rau cov khoom khov thiab ua rau muaj teeb meem qis qis. Kev ua haujlwm txhim khu kev qha xav tau cov tswj hwm uas tsis yog tsuas yog tswj hwm qhov siab tab sis kuj tseem tiv taus kev hloov pauv thermal, kev co, thiab cov khoom tsis huv uas yuav tsim ntawm qhov kub qis.

 

 

Lub Luag Haujlwm ntawm Cov Ntxig thiab Cov Diaphragms hauv Kev Ua Haujlwm ntawm Tus Tswj Xyuas

Hauv cov khoom tswj siab, cov foob thiab cov diaphragms yog qhov tseem ceeb rau kev tswj hwm lub kaw lus kom ruaj khov. Cov foob, feem ntau yog O-rings lossis gaskets, tsim cov teeb meem ntawm cov chav sab hauv, tiv thaiv cov kua dej los ntawm cov qhov nkag siab siab mus rau qhov tawm qis lossis huab cua. Lawv ua kom muaj kev xau hauv qab cov xwm txheej zoo li qub thiab hloov pauv, tseem ceeb rau kev tswj cov roj argon thiab zam kev poob lossis kev phom sij.

 

Cov diaphragms ua haujlwm ua cov membranes uas yoog tau uas hnov ​​​​​​qhov sib txawv ntawm lub siab, txhais lawv mus rau hauv kev ua haujlwm kho tshuab los hloov kho lub valve poppet lossis piston. Hauv cov regulators uas ua haujlwm ncaj qha, lub diaphragm nthuav dav lossis cog lus nrog kev hloov pauv ntawm qhov tawm, kho qhov orifice kom ruaj khov ntws. Cov ntaub ntawv yuav tsum sib npaug qhov yooj ywm rau kev teb nrog kev ruaj khov tiv thaiv cov voj voog siab. Hauv cryogenic argon regulators, cov khoom no ntsib cov xwm txheej hnyav, qhov twg lawv cov kev ua tau zoo cuam tshuam ncaj qha rau tag nrho kev ua haujlwm, los ntawm qhov tseeb ntawm lub siab mus rau kev nyab xeeb.

 

 

Cov teebmeem ntawm qhov kub qis rau ntawm cov ntsaws ruaj ruaj thiab cov diaphragms

Qhov kub qis ua rau muaj ntau qhov kev hloov pauv tsis zoo hauv cov foob thiab diaphragms, feem ntau yog vim cov khoom siv physics. Elastomers, uas feem ntau siv rau hauv cov qauv tsim qauv, dhau los ua qhov hloov pauv iav (T_g), qhov twg lawv hloov ntawm roj hmab mus rau lub xeev iav, poob elasticity thiab ua brittle. Piv txwv li, roj hmab nitrile tawv hauv qab -40 ° C, tawg thaum muaj kev ntxhov siab thiab tsis ua raws li cov nplaim sealing, ua rau muaj cov kab me me xau.

 

Kev sib zog ntawm cov cua sov yog lwm qhov tseem ceeb: cov elastomers ntswj ntau dua li cov hlau (cov coefficients sib txawv ntawm kev nthuav dav ntawm cov cua sov), txo qhov kev sib zog thiab kev zawm ntawm lub foob. Qhov no tuaj yeem ua rau cov qog puv qis dua qhov teev tseg, ua rau muaj kev xau hauv qab qhov siab qis. Hauv cov diaphragms, kev sib zog ua rau cov khoom tawv, ua rau tsis teb rau kev hloov pauv ntawm lub siab thiab ua rau qeeb qeeb.

 

Kev tawg yooj yim ua rau muaj kev pheej hmoo tawg thaum lub sijhawm teeb tsa lossis ua haujlwm; piv txwv li, cov yeeb yaj kiab neoprene tuab dua 5 mils tawg ntawm 76 K (-197 ° C). Cov teeb meem ntawm kev siv lubrication tshwm sim thaum cov kua dej tuab lossis khov, ua rau muaj kev sib txhuam thiab hnav hauv cov foob pob hluav taws xob. Kev tso pa tawm hauv cov xwm txheej cryogenic zoo li lub tshuab nqus tsev ua rau cov kab ke tsis huv, thaum cov pa roj uas nqus tau ua rau cov foob pob tawg thaum sov.

 

Hauv cov argon regulators, Joule-Thomson txias ua rau cov no hnyav dua, tej zaum yuav khov cov dej noo ntawm cov diaphragms thiab xauv lawv rau hauv qhov chaw. Cryogenic blistering cuam tshuam rau cov ntaub ntawv uas muaj carbon, qhov twg cov dej noo uas raug kaw nthuav dav thiab ua puas rau cov qauv. Zuag qhia tag nrho, cov teebmeem no ua rau kev ua haujlwm ntawm kev sib khi tsis zoo, ua rau muaj kev puas tsuaj zuj zus.

 

 

Kev Cuam Tshuam rau Kev Ua Haujlwm ntawm Tus Tswj Xyuas

Kev ua haujlwm tsis zoo ntawm cov foob thiab cov diaphragms hauv qhov kub qis ua rau lub regulator ua haujlwm tsis zoo. Cov xau los ntawm cov foob tawg lossis cov foob uas tawg ua rau argon tawm, txo qhov ua haujlwm ntawm lub kaw lus thiab ua rau muaj kev pheej hmoo ntawm kev ua pa tsis taus hauv qhov chaw kaw. Hauv cov txheej txheem ua pa, qhov no tuaj yeem ua rau lub siab tsis ruaj khov, nrog rau qhov hloov pauv ntawm qhov hluav taws xob ua rau muaj kev cuam tshuam lossis cov khoom siv puas tsuaj.

 

Cov diaphragms uas tawv tsis ua haujlwm kom raug qhov siab, ua rau lub siab poob qis thaum muaj dej ntws ntau lossis teb qeeb, uas nyob rau hauv cov teeb tsa argon siab yuav ua rau cov kab hauv qab siab dhau. Cov dej khov los ntawm Joule-Thomson cov teebmeem tuaj yeem ntes cov khoom, nres kev tswj hwm tag nrho thiab muaj kev pheej hmoo ntawm kev ua haujlwm ntawm lub qhov cua txias siab dhau, ua rau roj pov tseg.

 

Kev nyab xeeb muaj teeb meem loj heev: cov pa roj argon xau, txawm tias tsis muaj zog, ua rau cov pa oxygen hloov chaw, thaum nyob rau hauv cov tshuab sib xyaw ua ke, qhov tsis ua haujlwm tuaj yeem kub hnyiab yog tias muaj pa oxygen. Kev saib xyuas nce ntxiv, nrog rau kev hloov pauv ntau zaus tsav cov nqi. Hauv cov ntawv thov tseem ceeb xws li cov pa oxygen kho mob lossis kev siv roj rau lub dav hlau, qhov tsis ua haujlwm zoo li no tuaj yeem ua rau muaj kev phom sij rau lub neej lossis lub luag haujlwm.

 

 

Kev Hloov Kho Khoom Siv Rau Kev Ua Haujlwm Kub Qis

Txhawm rau tiv thaiv cov teebmeem kub qis, kev xaiv cov khoom siv tsom mus rau cov polymers thiab cov hlau uas khaws tau qhov yooj ywm thiab lub zog. Polytetrafluoroethylene (PTFE) yog qhov zoo tshaj plaws, nrog rau qhov ntsuas kub txog -260 ° C, kev sib txhuam tsawg, thiab kev tsis muaj tshuaj lom neeg, zoo tagnrho rau cov foob hauv argon regulators. PTFE hloov kho lossis cov hloov pauv puv ua rau muaj kev tiv thaiv kev hnav yam tsis muaj kev cuam tshuam rau kev ua haujlwm txias.

 

Kel-F (PCTFE) thiab TFM ua tau zoo hauv cov twj tso kua mis cryogenic, muab kev ua haujlwm ntau yam txog li -460°F. Ultra-high molecular weight polyethylene (UHMW PE) muab cov khoom cryogenic zoo heev, siv rau hauv cov ntsaws ruaj ruaj uas muaj zog rau lub caij nplooj ntoos hlav rau cov ntawv thov dynamic.

 

Rau cov diaphragms, cov hlau tsis xeb (piv txwv li, 316L) lossis cov ntaub thaiv PTFE khi tiv thaiv kev tawm ntawm cov pa roj thiab tswj kev ua kom zoo. Cov elastomers zoo li FKM kub qis (GLT-hom) lossis fluorosilicone (FVMQ) hloov T_g qis dua, tsim nyog rau cov cryogenics nruab nrab. Cov hlau bellows, feem ntau yog 347 stainless hlau, hloov elastomers tag nrho, zam kev brittleness.

 

Cov txheej txheem xws li Teflon lossis indium rau ntawm cov hlau uas muaj nickel ntau txhim kho kev sib khi hauv cov ntawv thov static. Kev sim ntawm TR-10 thiab brittle point ua kom muaj kev sib xws.

 

 

Kev Hloov Kho Tsim Rau Kev Ua Haujlwm Txhim Khu Kev Ruaj Ntseg

Kev hloov kho tsim ua kom tiav cov ntaub ntawv. Cov foob siv lub caij nplooj ntoos hlav siv cov cantilever lossis helical springs (piv txwv li, Inconel) los tswj lub zog txawm tias qaug zog. Cov qauv tsim Bellows tshem tawm cov dynamic O-rings, txo cov ntsiab lus tsis ua haujlwm.

 

Cov tswj hwm uas muaj lub dome-loaded txo qhov droop hauv cov dej txias, thaum cov yam ntxwv qis-pressure drop tso cai rau kev hloov kho ntawm qhov sib txawv tsawg kawg nkaus. Kev hloov kho kev taw qhia tiv thaiv kev sib sau ua ke ntawm dej khov, thiab cov thawv cua sov txo qhov Joule-Thomson txias.

 

Cov phiaj xwm API zoo li Txoj Kev Npaj 53 siv cov kua dej thaiv (piv txwv li, propylene glycol rau -51 ° C) rau kev foob ob npaug. Cov ntsej muag monolithic thiab kev sib dhos qhuav zam kev khov cov roj nplua nyeem.

 

xaus

Cov teebmeem kub qis rau cov foob thiab diaphragms—brittleness, contraction, thiab stiffness—ua rau puas tsuaj loj heev high-pressure argon roj regulator kev ua haujlwm, muaj kev pheej hmoo ntawm kev xau thiab kev tsis ruaj khov. Kev hloov kho xws li PTFE seals, hlau bellows, thiab lub caij nplooj ntoos hlav-energized tsim kom muaj kev ntseeg siab hauv cryogenic ib puag ncig. Los ntawm kev muab qhov tseem ceeb rau cov no, cov kab ke ua tiav kev nyab xeeb thiab kev ua haujlwm zoo.

Yog xav paub ntxiv txog qhov cuam tshuam ntawm qhov kub thiab txias ntawm qhov chaw qis rau lub tshuab tswj roj argon siab, koj tuaj yeem mus saib Jewellok ntawm https://www.jewellok.com/ yog xav paub ntau info.