0102 ib0304 ib05
5 Cov ntsiab lus tseem ceeb uas yuav tsum nco ntsoov txog kev teeb tsa valve.
2022-09-15 IB
5 Cov ntsiab lus tseem ceeb uas yuav tsum nco ntsoov txog kev teeb tsa valve. 1 Kev taw qhia thiab txoj hauj lwm Ntau lub valve yog kev taw qhia Piv txwv li, lub ntiaj teb valve, throttle valve, siab txo valve, kos valve, thiab lwm yam., yog tias ntsia rov qab, nws yuav cuam tshuam rau kev siv thiab lub neej (xws li lub valve), los yog tsis ua hauj lwm tag nrho (xws li lub siab txo valve), thiab txawm ua rau muaj kev phom sij (xws li kos valve). General li qub nrog cov cim taw qhia ntawm lub cev. Yog tias tsis yog, nws yuav tsum raug txheeb xyuas raws li lub hauv paus ntsiab lus ntawm kev ua haujlwm valve. Lub valve chamber nyob ib ncig ntawm lub ntiaj teb valve yog asymmetrical, kua los ntawm hauv qab mus rau sab saum toj los ntawm lub valve chaw nres nkoj, yog li cov kua kuj yog me me (txiav txim siab los ntawm cov duab), qhib zog-txuag (vim qhov nruab nrab siab nce) , kaw tom qab qhov nruab nrab siab packing, yooj yim kho, qhov no yog vim li cas lub ntiaj teb valve tsis tuaj yeem nruab qhov tseeb. Lwm cov valve muaj lawv tus kheej yam ntxwv. Valve installation txoj hauj lwm yuav tsum yooj yim rau kev khiav lag luam Txawm hais tias lub installation yog ib ntus nyuaj, nws yog ib qho tsim nyog yuav tau xav txog kev ua haujlwm ntev ntawm tus neeg teb xov tooj. Zoo dua valve handwheel thiab lub hauv siab alignment (feem ntau 1.2 meters los ntawm kev khiav hauj lwm hauv pem teb), kom qhov qhib thiab kaw ntawm lub valve yog tsawg zog. Pem teb valve handwheel yuav tsum tig los thiab tsis tilted kom tsis txhob ua haujlwm txawv txawv. Lub valve ntawm lub tshuab phab ntsa nyob ntawm cov khoom siv, thiab tus neeg teb xov tooj yuav tsum tau sab laug sab laug. Txhawm rau kom tsis txhob ua haujlwm ntawm lub ntuj, tshwj xeeb tshaj yog cov kua qaub thiab alkali, tshuaj lom tshaj tawm, txwv tsis pub nws tsis muaj kev nyab xeeb. Lub rooj vag yuav tsum tsis txhob thim rov qab (uas yog, lub log tsheb poob qis), txwv tsis pub qhov nruab nrab yuav khaws cia rau hauv qhov chaw npog rau lub sijhawm ntev, yooj yim rau corrode lub qia, thiab rau qee cov txheej txheem yuav tsum taboo. Nws yog qhov tsis yooj yim heev los hloov cov ntim khoom tib lub sijhawm. Qhib STEM GATE VALVES, TSIS TXHOB INSTALL underground, txwv tsis pub vim damp corrosion ntawm qia raug. Nqa daim tshev valve, kev teeb tsa kom ntseeg tau tias lub valve disc ntsug, kom lub nqa tau yooj yim. Lub viav vias kos valve, thaum ntsia los xyuas kom meej tias tus pin theem, thiaj li ua viav vias hloov tau. Lub siab txo valve yuav tsum tau muab ntsia rau ntawm cov yeeb nkab kab rov tav, thiab yuav tsum tsis txhob qaij nyob rau hauv ib qho kev taw qhia. 2 Kev Tsim Kho Kev Ua Haujlwm Kev teeb tsa thiab kev tsim kho yuav tsum tau ceev faj, tsis txhob ntaus lub valve ua los ntawm cov khoom siv nkig. Ua ntej kev teeb tsa Txhua hom valve thiab cov lus qhia tshwj xeeb yuav tsum tau ua tib zoo xyuas kom ua raws li cov qauv tsim. (KEV seb lawv puas tuaj yeem siv tau rau hauv qhov xav tau raws li tus qauv valve thiab lub Hoobkas cov lus qhia, thiab ua qhov ntsuas dej lossis huab cua yog tias tsim nyog.) Tsis tas li ntawd, nws yuav tsum tau kuaj xyuas seb qhov ntim puas puas lawm, seb lub caj pas bolts puas muaj. kev hloov pauv txaus, thiab xyuas seb lub qia thiab disc puas yog suab, seb puas muaj qhov tshwm sim daig thiab skew. Lub sealing nto ntawm lub valve disc yuav tsum raug kaw kom nruj, thiab qhov zoo ntawm cov xov yuav tsum tau kuaj xyuas cov threaded li qub. Tsis tsim nyog li qub yuav tsum TSIS TAU INSTALLED thiab yuav tsum sib cais los yog cim. *** Cov khib nyiab hauv lub valve. Cov txheej txheem installation thaum lifting lub valve, cov hlua yuav tsum tsis txhob muab khi rau lub handwheel los yog STEM kom tsis txhob muaj kev puas tsuaj rau tej yam. Nws yuav tsum tau muab khi rau lub flange. Txoj kab uas lub valve txuas nrog yuav tsum tau muab ntxuav. Cov cua compressed tuaj yeem siv los tshuab hlau oxide filings, xuab zeb, vuam slag thiab lwm yam sundries. Cov khib nyiab no, tsis tsuas yog yooj yim los khawb qhov sealing nto ntawm lub valve, cov khoom loj ntawm cov khib nyiab (xws li vuam slag), tab sis kuj tuaj yeem thaiv lub valve me me, kom nws tsis ua haujlwm. Thaum INSTALLING THE SCREW VALVE, LUB SEALING PACKING (Xoo thiab txhuas roj los yog PTFE RAW khoom siv siv) yuav tsum tau qhwv rau ntawm cov yeeb nkab xov, tsis txhob nkag mus rau hauv lub valve, thiaj li zam lub valve nco ntim, cuam tshuam qhov nruab nrab ntws. Thaum txhim kho flange li qub, xyuam xim rau zawm cov bolts symmetrically thiab tusyees. Lub valve flange thiab cov yeeb nkab flange yuav tsum ua tib yam, qhov kev tshem tawm yog qhov tsim nyog, tsam lub valve ua rau siab dhau, txawm tias tawg. Rau cov ntaub ntawv nkig thiab tsis muaj zog ntawm lub valve, tshwj xeeb yuav tsum tau them nyiaj. Lub valve yuav tsum tau welded nrog cov yeeb nkab yuav tsum tau welded ua ntej, ces qhov kaw yuav tsum qhib tag nrho, thiab ces welded tuag. 3 Kev Tiv Thaiv Kev Ntsuas Ib txhia li qub yuav tsum muaj kev tiv thaiv sab nraud, uas yog kev txuag hluav taws xob thiab khaws cia txias. Cov txheej rwb thaiv tsev yog qee zaum tov nrog cov kab kub kub. Dab tsi ntawm lub valve yuav tsum yog cua sov lossis txias, raws li qhov yuav tsum tau ua. Raws li txoj cai, qhov nruab nrab ntawm lub valve kom txo qhov kub thiab txias ntau dhau, yuav cuam tshuam rau kev tsim khoom los yog khov lub valve, koj yuav tsum ua kom sov, txawm tias sib tov kub; Qhov twg lub valve yog liab qab, tsis zoo rau ntau lawm los yog ua rau Frost thiab lwm yam tsis zoo tshwm sim, koj yuav tsum tau txias. Cov ntaub ntawv rwb thaiv tsev yog asbestos, slag wool, iav ntaub plaub, perlite, diatomite, vermiculite, thiab lwm yam; Cov khoom cua txias yog cork, perlite, ua npuas ncauj, yas thiab lwm yam. 4 Bypass thiab meter Ib txhia li qub, ntxiv rau qhov tsim nyog cov chaw tiv thaiv, kuj muaj bypass thiab instrumentation. Ib tug bypass yog ntsia. Yooj yim kho lub ntxiab. Lwm yam li qub, kuj ntsia bypass. Bypass installation nyob ntawm valve mob, qhov tseem ceeb, thiab ntau lawm yuav tsum tau. 5 Kev hloov pauv Tshuag valve, qee qhov ntim tsis tau zoo, thiab qee qhov tsis ua raws li kev siv xov xwm, uas yuav tsum tau hloov cov ntim khoom. Valve Hoobkas tsis tuaj yeem xav txog kev siv ntau txhiab ntau hom kev tshaj tawm, lub thawv ntim khoom ib txwm muaj cov hauv paus zoo tib yam, tab sis thaum siv, yuav tsum cia cov ntim hauv nruab nrab kom haum. Thaum hloov packing, nias nyob rau hauv ib ncig ntawm ib ncig. Txhua lub nplhaib seam rau 45 degrees yog qhov tsim nyog, lub nplhaib thiab lub nplhaib qhib 180 degrees. Qhov siab ntim yuav tsum xav txog lub leeway rau lub caj pas mus txuas ntxiv, thiab tam sim no nws yog ib qho tsim nyog yuav tsum cia qhov qis ntawm lub caj pas nias lub packing chamber mus rau qhov tsim nyog qhov tob, uas feem ntau tuaj yeem yog 10-20% ntawm tag nrho qhov tob. packing chamber. Rau qhov xav tau li qub, lub kaum sab xis sib koom yog 30 degrees. Lub seam ntawm lub nplhaib thiab lub nplhaib yog staggered 120 degrees. Ntxiv rau qhov ntim, tab sis kuj raws li qhov xwm txheej tshwj xeeb, kev siv roj hmab O-ring (natural roj hmab resistant rau 60 degrees Celsius tsis muaj zog alkali, butadiene roj hmab resistant rau 80 degrees Celsius roj siv lead ua, fluorine roj hmab resistant rau ntau yam corrosive. xov xwm hauv qab no 150 degrees Celsius) peb stacked polytetrafluoron nplhaib (resistant rau muaj zog corrosive xov xwm hauv qab no 200 degrees Celsius) nylon tais nplhaib (resistant rau 120 degrees Celsius ammonia, alkali) thiab lwm yam khoom muab tub lim. Ib txheej ntawm TEflon raw khoom daim kab xev tuaj yeem txhim kho cov nyhuv sealing thiab txo cov electrochemical corrosion ntawm lub valve qia. Thaum nias lub seasoning, tig lub qia tib lub sij hawm kom tag nrho ib ncig ntawm tusyees, thiab tiv thaiv kom tsis txhob tuag, zawm lub caj pas kom sib npaug, tsis tuaj yeem qaij. Nws yog ib qho tseem ceeb kom khaws cov ntsiab lus hauv siab txog kev teeb tsa valve! Qhov zoo ntawm valve installation ncaj qha cuam tshuam rau kev siv, yog li ceev faj yuav tsum tau them rau nws. (a) valve installation kev taw qhia thiab txoj hauj lwm Muaj ntau lub li qub muaj cov kev taw qhia, xws li lub ntiaj teb valve, throttle valve, siab txo lub valve, kos valve, thiab lwm yam., yog tias ntsia rov qab, nws yuav cuam tshuam rau kev siv cov nyhuv thiab lub neej (xws li lub throttle. valve), lossis tsis ua haujlwm tag nrho (xws li lub siab txo lub valve), thiab tseem ua rau muaj kev phom sij (xws li kos valve). General valve, muaj cov cim taw qhia ntawm lub cev valve; Yog tias tsis yog, nws yuav tsum raug txheeb xyuas raws li lub hauv paus ntsiab lus ntawm kev ua haujlwm valve. Lub valve chamber nyob ib ncig ntawm lub ntiaj teb valve yog asymmetrical, kua los ntawm hauv qab mus rau sab saum toj los ntawm lub valve chaw nres nkoj, yog li cov kua kuj yog me me (txiav txim siab los ntawm cov duab), qhib zog-txuag (vim qhov nruab nrab siab nce) , kaw tom qab qhov nruab nrab siab packing, yooj yim kho, qhov no yog vim li cas lub ntiaj teb valve tsis tuaj yeem nruab qhov tseeb. Lwm cov valve muaj lawv tus kheej yam ntxwv. Valve INSTALLATION POSITION, yuav tsum yooj yim rau kev khiav lag luam: Txawm tias lub installation yog ib ntus nyuaj, tab sis kuj rau tus neeg teb xov tooj txoj haujlwm mus sij hawm ntev. Valve handwheel thiab hauv siab ua kom zoo (feem ntau 1.2 meters los ntawm kev ua haujlwm hauv pem teb), kom qhov qhib thiab kaw ntawm lub valve yog siv zog tsawg. Pem teb valve handwheel yuav tsum tig los thiab tsis tilted kom tsis txhob ua haujlwm txawv txawv. Lub valve ntawm lub tshuab phab ntsa nyob ntawm cov khoom siv, thiab tus neeg teb xov tooj yuav tsum tau sab laug sab laug. Txhawm rau kom tsis txhob ua haujlwm ntawm lub ntuj, tshwj xeeb tshaj yog cov kua qaub thiab alkali, tshuaj lom tshaj tawm, txwv tsis pub nws tsis muaj kev nyab xeeb. Lub rooj vag yuav tsum tsis txhob thim rov qab (uas yog, lub log tsheb poob qis), txwv tsis pub qhov nruab nrab yuav khaws cia rau hauv qhov chaw npog rau lub sijhawm ntev, yooj yim rau corrode lub qia, thiab rau qee cov txheej txheem yuav tsum taboo. Nws yog qhov tsis yooj yim heev los hloov cov ntim khoom tib lub sijhawm. Qhib STEM GATE VALVES, TSIS TXHOB INSTALL underground, txwv tsis pub vim damp corrosion ntawm qia raug. Nqa daim tshev valve, kev teeb tsa kom ntseeg tau tias lub valve disc ntsug, kom lub nqa tau yooj yim. Lub viav vias kos valve, thaum ntsia los xyuas kom meej tias tus pin theem, thiaj li ua viav vias hloov tau. Lub siab txo valve yuav tsum tau muab ntsia rau ntawm cov yeeb nkab kab rov tav, thiab yuav tsum tsis txhob qaij nyob rau hauv ib qho kev taw qhia. (2) kev txhim kho valve thiab kev tsim kho Kev txhim kho thiab kev tsim kho yuav tsum tau ceev faj, tsis txhob ntaus lub valve ua los ntawm cov khoom siv nkig. Ua ntej INSTALLATION, LUB VALVE yuav tsum tau soj ntsuam xyuas cov kev qhia tshwj xeeb thiab cov qauv txhawm rau txheeb xyuas qhov kev puas tsuaj, tshwj xeeb tshaj yog rau qia. Tsis tas li ntawd tig ob peb zaug kom pom tias nws yog skewed, vim hais tias nyob rau hauv tus txheej txheem ntawm kev thauj mus los, nws yog ib qho yooj yim mus ntaus lub skewed qia. Kuj *** khib nyiab hauv lub valve. Thaum lifting lub valve, txoj hlua yuav tsum tsis txhob muab khi rau lub handwheel los yog qia kom tsis txhob muaj kev puas tsuaj rau cov khoom no. Nws yuav tsum tau muab khi rau lub flange. Txoj kab uas lub valve txuas nrog yuav tsum tau muab ntxuav. Cov cua compressed tuaj yeem siv los tshuab hlau oxide filings, xuab zeb, vuam slag thiab lwm yam sundries. Cov khib nyiab no, tsis tsuas yog yooj yim los khawb qhov sealing nto ntawm lub valve, cov khoom loj ntawm cov khib nyiab (xws li vuam slag), tab sis kuj tuaj yeem thaiv lub valve me me, kom nws tsis ua haujlwm. Thaum INSTALLING THE SCREW VALVE, LUB SEALING PACKING (Xoo thiab txhuas roj los yog PTFE RAW khoom siv siv) yuav tsum tau qhwv rau ntawm cov yeeb nkab xov, tsis txhob nkag mus rau hauv lub valve, thiaj li zam lub valve nco ntim, cuam tshuam qhov nruab nrab ntws. Thaum txhim kho flange li qub, xyuam xim rau zawm cov bolts symmetrically thiab tusyees. Lub valve flange thiab cov yeeb nkab flange yuav tsum ua tib yam, qhov kev tshem tawm yog qhov tsim nyog, tsam lub valve ua rau siab dhau, txawm tias tawg. Rau cov ntaub ntawv nkig thiab tsis muaj zog ntawm lub valve, tshwj xeeb yuav tsum tau them nyiaj. Lub valve yuav tsum tau welded nrog cov yeeb nkab yuav tsum tau welded ua ntej, ces qhov kaw yuav tsum qhib tag nrho, thiab ces welded tuag. (3) kev tiv thaiv valve Qee lub valve yuav tsum muaj kev tiv thaiv sab nraud, uas yog kev txuag hluav taws xob thiab khaws cia txias. Cov txheej rwb thaiv tsev yog qee zaum tov nrog cov kab kub kub. Dab tsi ntawm lub valve yuav tsum yog cua sov lossis txias, raws li qhov yuav tsum tau ua. Raws li txoj cai, qhov nruab nrab ntawm lub valve kom txo qhov kub thiab txias ntau dhau, yuav cuam tshuam rau kev tsim khoom los yog khov lub valve, koj yuav tsum ua kom sov, txawm tias sib tov kub; Qhov twg lub valve yog liab qab, tsis zoo rau ntau lawm los yog ua rau Frost thiab lwm yam tsis zoo tshwm sim, koj yuav tsum tau txias. Cov ntaub ntawv rwb thaiv tsev yog asbestos, slag wool, iav ntaub plaub, perlite, diatomite, vermiculite, thiab lwm yam; Cov khoom cua txias yog cork, perlite, ua npuas ncauj, yas thiab lwm yam. (4) Bypass thiab instrumentation Ib txhia li qub, ntxiv rau qhov tsim nyog cov chaw tiv thaiv, kuj muaj bypass thiab instrumentation. Ib tug bypass yog ntsia. Yooj yim kho lub ntxiab. Lwm yam li qub, kuj ntsia bypass. Bypass installation nyob ntawm valve mob, qhov tseem ceeb, thiab ntau lawm yuav tsum tau. (5) Kev hloov cov ntim khoom Tshuag, qee qhov ntim tsis tau zoo, thiab qee qhov tsis ua raws li kev siv xov xwm, uas yuav tsum tau hloov cov ntim khoom. Valve Hoobkas tsis tuaj yeem xav txog kev siv ntau txhiab ntau hom kev tshaj tawm, lub thawv ntim khoom ib txwm muaj cov hauv paus zoo tib yam, tab sis thaum siv, yuav tsum cia cov ntim hauv nruab nrab kom haum. Thaum hloov packing, nias nyob rau hauv ib ncig ntawm ib ncig. Txhua lub nplhaib seam rau 45 degrees yog qhov tsim nyog, lub nplhaib thiab lub nplhaib qhib 180 degrees. Qhov siab ntim yuav tsum xav txog lub leeway rau lub caj pas mus txuas ntxiv, thiab tam sim no nws yog ib qho tsim nyog yuav tsum cia qhov qis ntawm lub caj pas nias lub packing chamber mus rau qhov tsim nyog qhov tob, uas feem ntau tuaj yeem yog 10-20% ntawm tag nrho qhov tob. packing chamber. Rau qhov xav tau li qub, lub kaum sab xis sib koom yog 30 degrees. Lub seam ntawm lub nplhaib thiab lub nplhaib yog staggered 120 degrees. Ntxiv rau qhov ntim, tab sis kuj raws li qhov xwm txheej tshwj xeeb, kev siv roj hmab O-ring (natural roj hmab resistant rau 60 degrees Celsius tsis muaj zog alkali, butadiene roj hmab resistant rau 80 degrees Celsius roj siv lead ua, fluorine roj hmab resistant rau ntau yam corrosive. xov xwm hauv qab no 150 degrees Celsius) peb stacked polytetrafluoron nplhaib (resistant rau muaj zog corrosive xov xwm hauv qab no 200 degrees Celsius) nylon tais nplhaib (resistant rau 120 degrees Celsius ammonia, alkali) thiab lwm yam khoom muab tub lim. Ib txheej ntawm TEflon raw khoom daim kab xev tuaj yeem txhim kho cov nyhuv sealing thiab txo cov electrochemical corrosion ntawm lub valve qia. Thaum nias lub seasoning, tig lub qia tib lub sij hawm kom tag nrho ib ncig ntawm tusyees, thiab tiv thaiv kom tsis txhob tuag, zawm lub caj pas kom sib npaug, tsis tuaj yeem qaij.