Kev tshawb nrhiav thiab kev siv lub siab kub valve packing

Kev tshawb fawb thiab kev siv lub siab kub valve packing Qhov kev khiav hauj lwm kub ntawm lub valve yog 425 ~ 550 ℃ rau siab kub ⅰ qib (hu ua PI qib). Cov khoom tseem ceeb ntawm PI chav kawm valve yog "siab kub qib Ⅰ nruab nrab carbon chromium nickel tsis tshua muaj ntiaj teb titanium zoo tshav kub-resistant steel" nyob rau hauv ASTMA351 tus qauv CF8 ua lub hauv paus. Txij li qib PI yog ib lub ntsiab lus tshwj xeeb, lub tswv yim ntawm kev kub siab stainless hlau (P) suav nrog ntawm no. Yog li, yog tias qhov nruab nrab ua haujlwm yog dej lossis chav, txawm hais tias tseem muaj cov hlau kub kub WC6 (t≤540 ℃) lossis WC9 (t≤570 ℃), hauv cov roj sulfur, txawm tias tseem muaj cov hlau kub kub C5 (ZG1Cr5Mo), tab sis ntawm no tsis tuaj yeem hu lawv qib PI. Kev tshawb fawb thiab kev siv lub siab kub valve packing Valve yog ib qho khoom siv kho tshuab hauv kev lag luam niaj hnub no. Raws li kev tswj hwm tseem ceeb hauv cov dej sib kis, nws yog siv hauv boiler, chav kav dej, roj refining, tshuaj lom neeg kev lag luam, hluav taws kub thiab metallurgy, vim hais tias ntawm nws txoj kev txiav, kev tswj, kev tswj siab, shunting thiab lwm yam haujlwm. Kev lag luam niaj hnub tau muab tso rau hauv kev xav tau siab dua thiab siab dua rau kev ntseeg siab ntawm valve foob. Sealing kev ua tau zoo yog qhov tseem ceeb tshaj plaws kev ntsuas rau kev ntsuas qhov zoo ntawm cov khoom valve. Kub kub valve yog hais txog lub valve uas nws ua haujlwm kub siab tshaj 250 ℃. Lub tshuab muab tub lim sealing ntawm lub qia ntawm qhov kub thiab txias valve yog ib qho teeb meem tseem ceeb uas tsis tau daws tau ntau xyoo, thiab nws kuj yog ib qho kev sib txuas tsis muaj zog los txhim kho kev ntseeg siab ntawm lub valve. Feem ntau qhov kub thiab txias valve qia packing foob feem ntau tshwm sim tsis txaus los yog ntau dhau, valve qia nyob rau hauv lub sij hawm ntev yooj yim rau to, lub to ntawm inflammable, explosive, lom thiab lwm yam khoom txaus ntshai tsis tsuas yog cog thiab kev lag luam poob, tab sis kuj ua rau ib puag ncig muaj kuab paug, thiab txawm tias cov neeg ua haujlwm raug xwm txheej raug mob, rau cov cuab yeej ua haujlwm txaus ntshai. Ua ntej, lub hauv paus ntsiab lus ntawm valve packing seal Lub sealing kev ua tau zoo ntawm valve yog ib qho tseem ceeb Performance index los ntsuas qhov zoo thiab kev ua tau zoo ntawm valve. Tam sim no feem ntau ntawm cov tswj valve los yog dav dav valve qia thiab ntim cov foob rau kev sib cuag foob, vim nws cov qauv yooj yim, yooj yim sib dhos thiab hloov, tus nqi qis thiab siv tau. Valve qia thiab packing to yog ib qho tshwm sim. Yog vim li cas vim li cas packing tuaj yeem ua lub luag haujlwm ntawm sealing, nws txoj cai tam sim no muaj ob lub ntsiab sealing views, raws li bearing effect thiab maze effect. Packing bearing effect yog hais txog kev ntim ntawm cov muab tub lim thiab qia, nyem packing thiab nyob rau hauv kev cuam tshuam ntawm sab nraud lubricant, vim hais tias ntawm lub nro nyob rau hauv lub cheeb tsam ntawm lub qia los ua ib tug txheej ntawm kua membrane, ua packing thiab qia daim ntawv zoo ib yam li ntawm zawv zawg bearing, kev sib raug zoo ntawm xws li packing thiab qia yuav tsis yog vim muaj kev sib txhuam ntau dhau thiab hnav, vim tias cov yeeb yaj kiab ua kua muaj nyob rau tib lub sijhawm, qhov ntim thiab lub valve qia lub sijhawm nyob rau hauv lub xeev kaw. Labyrinth packing effect yog hais txog qhov kev sib tw ntawm cov qia tsis tuaj yeem ncav cuag micro theem, packing thiab valve qia tsuas yog ib feem sib koom ua ke thiab tsis haum tag nrho, cov ntim thiab ib txwm muaj qhov sib txawv me me ntawm lub valve qia, thiab vim tias ntawm incision asymmetry nruab nrab ntawm packing los ua ke, cov khoob no tsim ib tug tshawb nrog ua ke, nruab nrab, nyob rau hauv uas ntau throttling, kauj ruam-down, thiab mus txog lub luag hauj lwm ntawm sealing. Ntawm cov nyhuv labyrinth yog hais txog lub valve qia packing seal deg qib degree tsis tuaj yeem ncav cuag micro theem, qhov sib txawv me me ntawm qia thiab packing qhov no yog lub hom phiaj ntawm lub neej, tsis tuaj yeem tshem tawm, yog tias los ntawm qhov no los nqa ntawm cov qauv tsim, feem ntau cov nyhuv tsis yog. zoo tagnrho, uas yog ua rau lub hauv paus tej yam kev mob ntawm qhov chaw to los yog lub hwj chim to. Sealing xov xwm los ntawm kev ntim khoom thiab qia xau mechanism muaj ntau hom: corrosion gap to mechanism, ntxeem tau mechanism, lub zog to mechanism, thiab lwm yam. cov tshuab xau, thiab cov tswv yim txhim kho tau muab tso rau pem hauv ntej. Ob, hom ntim tam sim no thiab daim ntawv thov 1, teflon yias hauv paus Polytetrafluoroethylene yias hauv paus yog ua los ntawm cov ntshiab POLYTETRAFluOROethylene DISPERsing resin li raw khoom, thawj zaug ua los ntawm raw khoom zaj duab xis, thiab tom qab ntawd los ntawm kev sib tw, weaving rau hauv lub lauj kaub muaj zog. Qhov no hom ntawm lub hauv paus disk tsis muaj lwm yam additives, yuav siv tau nyob rau hauv cov zaub mov, tshuaj, papermaking chemical fiber thiab lwm yam siab huv si, thiab muaj zog corrosive nruab nrab ntawm lub valve, twj tso kua mis. Scope ntawm daim ntawv thov: Siv kub tsis tshaj 260 ℃, siv siab tsis tshaj 20MPa, pH tus nqi: 0-14. 2, nthuav graphite disc cag Expanded graphite disc cag tseem hu ua saj zawg zog graphite disc cag siv hloov tau graphite hlau woven los ntawm lub plawv. Nthuav graphite disc hauv paus muaj qhov zoo ntawm tus kheej-lubricity thiab thermal conductivity, me me kev sib txhuam coefficient, muaj zog versatility, zoo softness, siab zog, thiab kev tiv thaiv nyhuv ntawm ncej thiab pas nrig. Scope ntawm daim ntawv thov: Siv kub tsis tshaj 600 ℃, siv siab tsis tshaj 20MPa, pH tus nqi: 0-14. 3. Enhanced graphite coil hauv paus Qhov txhim kho graphite kauj yog woven los ntawm iav fiber ntau, tooj liab hlau, stainless hlau xaim, npib tsib xee hlau, caustic nickel alloy hlau thiab lwm yam ntaub ntawv txhawb los ntawm ntshiab nthuav graphite hlau. Nrog cov yam ntxwv ntawm nthuav graphite, thiab muaj zog versatility, zoo softness, siab zog. Ua ke nrog cov hauv paus hniav dav dav, nws yog ib qho ntawm cov khoom siv sealing zoo los daws qhov teeb meem ntawm qhov kub thiab txias siab sealing. Scope ntawm daim ntawv thov: Ua haujlwm kub tsis tshaj 550 ℃, kev khiav hauj lwm siab tsis tshaj 32MPa, pH tus nqi: 0-14. Lub hauv paus disc yog ib qho kev txhim kho ntawm qhov nthuav dav graphite disc cag, uas yog cov khoom sib khi zoo heev. Cov saum toj no teev ntau hom kev ntim disc hauv paus. Hauv cov txheej txheem tsim khoom tiag tiag, yuav muaj lwm yam kev ntim khoom disc hauv paus tsim rau kev ua haujlwm tshwj xeeb. Piv txwv li, zoo tshuaj tiv thaiv ntawm aramid fiber coil cag; Haum rau siab load rotation axis arylon carbon fiber sib xyaw coil hauv paus, thiab lwm yam., daim ntawv no txwv rau qhov chaw, tsis yog cov lus qhia ntxaws. Peb, hom valve ntim cov qauv thiab xaiv Cov qauv qia packing seal feem ntau yog tsim los ntawm siab phaj, caj pas, spacer thiab packing. Txhawm rau kom ua tiav cov nyuab siab zoo, cov ntim yog feem ntau yuav tsum muaj cov qauv tuab, tshuaj lom neeg zoo, qis kev sib txhuam. Feem ntau, qhov kub thiab txias yog qis dua 200 ℃, cov muab tub lim feem ntau xaiv polytetrafluoron disc cag, uas muaj cov yam ntxwv ntawm lubrication siab, tsis muaj viscosity, hluav taws xob rwb thaiv tsev thiab zoo aging kuj, thiab yog siv nyob rau hauv roj av, tshuaj, tshuaj thiab lwm yam. teb. Graphite disc hauv paus yog xaiv rau nws qhov kub thiab txias tsis kam, nws tus kheej lubrication thiab tsis tshua muaj kev sib txhuam coefficient ntawm qhov kub ntawm 200 mus rau 450. Graphite disc tau tsim raws li kev siv ntau yam kev faib tawm, hauv kev siv tswv yim, cov fillers tuaj yeem xaiv tau raws li qhov kev thov. Cov kev ua haujlwm tiag tiag ntawm cov khoom tsim nyog ntawm graphite disc, xws li 250 ℃, tsis tshua muaj siab siab tuaj yeem xaiv nthuav graphite disc, nruab nrab thiab siab siab tuaj yeem xaiv qhov zoo dua graphite disc lossis ob qho tib si. Plaub, qhov kub thiab txias valve ntim cov qauv xau kev tsom xam Nyob rau hauv qhov kub thiab txias, xws li kev xaiv ntawm graphite disc cag foob qauv, nws yog ib qho yooj yim kom pom cov pa tawm. Cov laj thawj yog raws li hauv qab no: Lub graphite disc cag tau ntim rau hauv lub thawv ntim khoom, thiab lub axial siab ntawm lub ntim yog thov los ntawm kev zawm lub fastening bolt ntawm lub caj pas. Vim hais tias cov ntim khoom muaj qee yam ntawm plasticity, axial siab tom qab radial siab thiab micro deformation, lub puab lub qhov thiab qia zoo sib xws, tab sis qhov haum no tsis zoo li nce thiab nqis. Raws li kev faib tawm ntawm cov ntim ntim siab thiab ntim ntim lub zog, nws tuaj yeem pom tias lub siab ntawm cov ntim ntim sab saud thiab cov ntim qis hauv lub thawv ntim khoom tsis zoo ib yam. Cov yas deformation ntawm ob feem ntawm cov ntim tsis zoo ib yam, thiab nws yog ib qho yooj yim kom muaj ntau dhau los yog tsis txaus sealing ntawm lub ntim thiab lub valve qia. Nyob rau tib lub sijhawm, kev sib txhuam ntawm qhov ntim thiab lub valve qia yuav ntau npaum li cas thaum lub zog radial compression nyob ze ntawm lub caj pas yog ntau, thiab lub valve qia thiab packing yog yooj yim hnav ntawm no. Nyob rau hauv cov ntaub ntawv ntawm qhov kub thiab txias, qhov kub thiab txias ntau dua, qhov nthuav dav ntawm graphite disc hauv paus, kev sib txhuam kuj nce, cov cua kub dissipation tshwm sim los ntawm qhov kub thiab txias tsis raws sij hawm, ceev cov hnav tus nqi ntawm qia thiab packing, uas tseem yog lub ntsiab. yog vim li cas rau qhov kub thiab txias valve packing to. Tsib, qhov kub thiab txias valve packing qauv txhim kho tsim Valve packing nyob rau hauv high kub tej yam kev mob yog tshwj xeeb tshaj yog prone to to, thiab kub kub packing feem ntau raws li nthuav graphite disc. Tus kheej-lubricity thiab o ntawm nthuav graphite packing yog zoo, lub rebound coefficient yog siab, tab sis qhov tsis zoo yog tsis yooj yim, tsis zoo shear kuj, feem ntau ntsia nyob rau hauv nruab nrab ib feem ntawm lub thawv ntim, los tiv thaiv kev nthuav dav ntawm graphite packing los ntawm packing caj pas. thiab hauv qab siab ncoo extrusion puas; Txhim kho graphite disc cag tuaj yeem ntsia tau rau saum thiab hauv qab vim nws muaj cov nickel hlau thiab muaj zog thiab extrusion resistant. Txawm hais tias kev sib xyaw ua ke ntawm kev nthuav dav graphite thiab txhim kho graphite disc daws ib feem ntawm cov ntim ntim ntawm qhov kub thiab txias. Tab sis rau qhov kev ua haujlwm ntawm lub valve yog qhov ua haujlwm ntau zaus, graphite disc hauv paus hnav tus nqi yog qhov siab, kev siv lub sijhawm ntev tom qab xav tau kom nruj lub fastening bolts ntawm lub thawv ntim khoom, rau phau ntawv thiab tshuaj xyuas tau coj teeb meem loj. Raws li kev txiav txim siab ntawm cov teeb meem saum toj no, peb ua ke nrog cov ntaub ntawv hauv tsev thiab txawv teb chaws thiab cov kev paub dhau los hauv xyoo tas los no los tsim cov qauv kev them nyiaj valve packing, tshwj xeeb tshaj yog rau cov kev ua haujlwm sib txawv, qhov kub thiab txias tsis tshua muaj siab thiab siab kub thiab siab siab, txoj kev loj hlob ntawm lub hom phiaj sib txawv high kub packing qauv, daws lub valve nyob rau hauv lub kub kub yooj yim to. Kub kub thiab tsis tshua muaj siab hom, siv tshwj xeeb compensatory nplhaib caij nplooj ntoos hlav thiab ua ke graphite disc cag ua ke. Lub siab ua haujlwm tsis siab, yog li lub tes tsho ntim tau muab tso tseg. Lub nplhaib tshwj xeeb lub caij nplooj ntoos hlav ntxiv rau hauv qab ntawm lub thawv ntim khoom. Thaum txhim kho, lub bolts yuav tsum tau nruj nrog ib tug tej yam preload. Txawm hais tias graphite packing thiab qia zoo li kev sib txhuam hnav, lub nplhaib lub caij nplooj ntoos hlav tuaj yeem ua qhov kev hloov kho kom haum xeeb kom ntseeg tau tias cov dej ntws tawm ntawm lub valve. Hom kub thiab kub siab, qhov no yog ib hom kev ntim khoom siab heev, txais yuav lub caij nplooj ntoos hlav disc thiab cam khwb cia lub caij nplooj ntoos hlav sab nraud ob npaug kev them nyiaj, tuaj yeem zam qhov kom zoo dua ntawm qhov kub thiab txias disable caij nplooj ntoos hlav, hom mob no, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias. cov nyiaj them poob haujlwm tsis ua haujlwm nyob rau hauv ib cheeb tsam, lwm pab pawg ntawm cov nyiaj them tseem muaj txiaj ntsig, ob qho tib si tsis muaj kev cuam tshuam, kev them nyiaj ib leeg tab sis tib lub sijhawm rau kev ntim khoom. Lub disc caij nplooj ntoos hlav foob kuj pab txhawb kev siv nyob rau hauv qhov hnyav sab nraum zoov, thiab cov qauv sab nraud ntawm ob lub ntsiab lus them nyiaj pab txhawb kev hloov pauv yam tsis tau tshem tawm tag nrho lub thawv ntim khoom, txhim kho kev ua haujlwm thiab yooj yim ntawm kev ua haujlwm. Tom qab cov neeg siv mus txog qhov ntev, hom ntim cov qauv no rau qhov kub thiab txias, siab siab qia sealing los tiv thaiv cov nyhuv to yog pom tseeb, kev pab lub neej ntev.