26 lub ntsiab lus tseem ceeb ntawm kev teeb tsa lub valve, 14 qhov kev txwv loj ntawm kev sib koom ua ke valve qhov zoo thiab qhov tsis zoo ntawm kev taw qhia
Nyob rau hauv txoj kev tsim kho, qhov zoo ntawm valve installation ncaj qha cuam tshuam rau kev ua haujlwm ib txwm nyob rau yav tom ntej, yog li peb yuav tsum tau them sai sai rau nws. Yog li, koj yuav nruab lub valve li cas? Dab tsi yog cov ntsiab lus tseem ceeb ntawm kev teeb tsa valve? Dab tsi yog cov taboos thiab ceev faj?
5 cov ntsiab lus tseem ceeb ntawm kev teeb tsa valve
1 Kev taw qhia thiab txoj haujlwm
Muaj ntau lub valve yog kev taw qhia
Piv txwv li, lub ntiaj teb valve, throttle valve, lub siab txo valve, kos valve, thiab lwm yam., yog hais tias ntsia rov qab, nws yuav cuam tshuam rau kev siv thiab lub neej (xws li throttle valve), los yog tsis ua hauj lwm (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 los 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 ua haujlwm
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 lub installation
Txhua hom valve thiab specifications yuav tsum tau ua tib zoo xyuas kom ua raws li cov kev cai tsim.
(KEV seb lawv puas tuaj yeem siv tau rau hauv cov xwm txheej 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 zoo li qub, seb lub caj pas bolt 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, 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
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 'meter'
Qee lub valve, 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 Ntim hloov
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.
Valve installation 14 loj taboos
1
Contraindications: Cov ntaub ntawv tseem ceeb, cov cuab yeej siv thiab cov khoom siv hauv kev tsim kho tsis muaj cov ntaub ntawv soj ntsuam zoo lossis cov ntawv pov thawj cov khoom tsim nyog raws li cov qauv hauv teb chaws tam sim no lossis kev tswj hwm.
Qhov tshwm sim: qhov zoo ntawm qhov project tsis tsim nyog, muaj kev sib tsoo zais, tsis tuaj yeem xa tuaj raws sijhawm, yuav tsum tau rov ua dua tshiab; Ua rau qhov project qeeb, manpower thiab cov khoom nkag tau nce.
Kev ntsuas: cov ntaub ntawv tseem ceeb, cov khoom siv thiab cov khoom siv hauv cov dej thiab cov dej ntws thiab cov cua sov thiab kev huv huv engineering yuav tsum ua kom tau raws li cov qauv tam sim no los ntawm lub xeev lossis Ministry of technical appraisal cov ntaub ntawv lossis daim ntawv pov thawj khoom tsim nyog; Cov khoom npe, qauv, specification, lub teb chaws zoo tus qauv code, hnub yug, lub npe thiab qhov chaw ntawm lub chaw tsim tshuaj paus, soj ntsuam daim ntawv pov thawj los yog code ntawm tus me nyuam yuav tsum tau qhia.
2
Tsis txhob: Lub valve installation ua ntej yuav tsum tau soj ntsuam zoo raws li cov kev cai.
Qhov tshwm sim: qhov kev ua haujlwm valve hloov pauv tsis hloov pauv, kaw xoob thiab dej ntws tawm (steam) tshwm sim, ua rau rov ua haujlwm dua, thiab tseem cuam tshuam rau cov dej ib txwm muaj (steam).
Ntsuas: Lub valve yuav tsum tau kuaj rau lub zog siab thiab nruj ua ntej kev teeb tsa. Qhov kev xeem yuav tsum xaiv 10% ntawm qhov ntau ntawm txhua batch (tib hom, tib specification, tib qauv), thiab tsis tsawg tshaj li ib. Rau lub kaw Circuit Court valve ntsia rau ntawm lub ntsiab yeeb nkab kom txiav tawm qhov kev ua haujlwm, yuav tsum yog ib qho los ntawm ib qho rau lub zog thiab kev ntsuas nruj. Lub VALVE lub zog thiab kev ntsuas nruj nruj yuav tsum ua raws li "Kev Tsim Kho Zoo Txais Txoj Cai rau Lub Tsev Siv Dej, Dej thiab Cua Sov Engineering" (GB 50242-2002).
3
Taboo: Installation valve specifications, qauv tsis ua tau raws li qhov yuav tsum tau tsim. Piv txwv li, lub nominal siab ntawm lub valve yog tsawg tshaj li qhov system xeem siab; Thaum txoj kab uas hla ntawm cov kav dej pub dej yog tsawg dua lossis sib npaug li 50 hli, siv lub rooj vag valve; Cov dej kub cua sov kom qhuav, ntsug yeeb nkab siv nres valve; Lub tshuab nqus dej ntawm lub twj tua hluav taws siv npauj npaim valve.
Qhov tshwm sim: cuam tshuam rau lub valve ib txwm qhib thiab kaw thiab kho qhov tsis kam, siab thiab lwm yam haujlwm. Txawm ua rau lub cev ua haujlwm, valve puas raug yuam kho.
Kev ntsuas: Paub txog daim ntawv thov ntawm ntau hom li qub, raws li cov qauv tsim los xaiv lub valve specifications thiab qauv. Lub nominal siab ntawm lub valve yuav tsum ua tau raws li qhov yuav tsum tau ntawm lub kaw lus ntsuas siab. Raws li qhov yuav tsum tau ua ntawm txoj cai kev tsim kho: dej muab cov yeeb nkab txoj kab uas hla tsawg dua los yog sib npaug li 50 hli yuav tsum tau siv txiav tawm valve; Lub rooj vag li qub yuav tsum tau siv thaum cov yeeb nkab txoj kab uas hla ntau dua 50mm.
Cov dej kub cua sov qhuav, ntsug tswj valve yuav tsum siv lub rooj vag valve, hluav taws kub twj tso kua mis yuav tsum tsis txhob siv npauj npaim valve.
4
Tsis txhob: Valve installation txoj kev tsis yog lawm. Piv txwv li, lub ntiaj teb valve los yog kos valve dej (steam) ntws kev taw qhia yog opposite rau lub kos npe rau, lub qia yog ntsia downward, kab rov tav installation ntawm kos valve yog ntsia vertically, pas nrig rooj vag valve los yog npauj npaim valve kov tsis qhib los yog kaw qhov chaw, lub valve qia tsis tig lub qhov rooj tshuaj ntsuam.
Qhov tshwm sim: valve tsis ua hauj lwm, hloov kho teeb meem, valve stem down feem ntau ua rau dej to.
Kev ntsuas: Txhim kho lub valve nruj me ntsis raws li cov lus qhia kev teeb tsa lub valve, tawm ntawm lub qia kom txuas qhov qhib qhov siab, lub npauj npaim valve siab xav txog qhov chaw sib hloov ntawm tus kov, txhua yam valve qia tsis tuaj yeem qis dua txoj haujlwm kab rov tav, cia ib leeg down. Nkaum valve tsis tsuas yog tsim kom tau raws li lub valve qhib thiab kaw cov kev xav tau ntawm lub qhov rooj tshuaj xyuas, tib lub sijhawm lub qia valve yuav tsum tau taw qhia rau lub qhov rooj tshuaj xyuas.
5
Taboo: npauj npaim valve flange nrog zoo tib yam valve flange.
Qhov tshwm sim: npauj npaim valve flange thiab zoo tib yam valve flange loj sib txawv, qee qhov flange txoj kab uas hla me me, thiab npauj npaim valve disc loj, ua rau tsis tuaj yeem qhib lossis nyuaj rau qhib lub valve puas.
Kev ntsuas: raws li qhov loj me ntawm npauj npaim valve flange flange ua flange.
6
Taboo: tsis muaj qhov tshwj xeeb thiab cov khoom sib txuas hauv kev tsim kho ntawm lub tsev, lossis qhov loj ntawm qhov tshwj xeeb yog qhov me me thiab cov khoom siv kos tsis raug cim.
Yog vim li cas: WARM sanitation project tsim, xaiv chisel tsev qauv, txawm txiav tawm qhov kev ntxhov siab, cuam tshuam rau lub tsev kev nyab xeeb kev ua tau zoo.
Kev ntsuas: Yuav tsum paub txog kev tsim cov duab kos ntawm cov cua sov thiab kev huv huv engineering ua tib zoo, thiab koom tes nrog kev tsim kho ntawm lub tsev qauv kom khaws cov qhov thiab cov khoom seem raws li kev xav tau ntawm cov kav dej thiab kev txhawb nqa hangers, nrog rau kev siv tshwj xeeb rau cov qauv tsim thiab kev tsim kho specifications.
7
Contraindications: Thaum vuam cov yeeb nkab, qhov tsis ncaj ncees lawm ntawm cov yeeb nkab tom qab ob khub tsis nyob rau tib lub Central Kab, tsis muaj qhov sib txawv ntawm cov khub, cov yeeb nkab tuab tuab tsis yog shovelled, thiab qhov dav thiab qhov siab ntawm qhov vuam tsis muaj. ua tau raws li cov cai ntawm kev tsim kho.
Yog vim li cas: Qhov kawg ntawm cov yeeb nkab tsis yog nyob rau hauv cov kab ncaj qha cuam tshuam rau qhov zoo ntawm vuam thiab qhov pom kev zoo. Tsis muaj qhov sib txawv ntawm ob sab, cov yeeb nkab phab ntsa tuab tsis shovelled, qhov dav thiab qhov siab ntawm qhov vuam tsis ua raws li qhov yuav tsum tau ua ntawm vuam lub zog.
Kev ntsuas: Tom qab vuam cov yeeb nkab khub, cov yeeb nkab yuav tsum tsis txhob yuam kev, yuav tsum nyob rau hauv Central Line, qhov sib txawv yuav tsum tau muab tso rau ntawm khub, tuab phab ntsa yeeb nkab yuav tsum tau shoveled zawj, ntxiv rau, qhov dav thiab qhov siab ntawm vuam seam. yuav tsum tau welded raws li specification yuav tsum tau.
8
Taboo: Lub raj xa dej ncaj qha faus rau hauv cov av khov thiab tsis muaj kev kho cov av xoob, qhov sib txuas ntawm cov kav dej thiab qhov chaw tsis raug, lossis txawm tias siv cov ntawv cib qhuav qhuav.
Qhov tshwm sim: Vim qhov kev txhawb nqa tsis ruaj khov, cov yeeb nkab tau raug puas ntsoog hauv cov txheej txheem ntawm lub ntiaj teb rov qab tamping, ua rau rov ua haujlwm dua.
Kev ntsuas: Lub raj xa dej yuav tsum tsis txhob muab faus rau hauv cov av khov lossis tsis kho cov av xoob, qhov sib txawv ntawm cov PIERS yuav tsum tau raws li cov kev cai ntawm kev tsim kho, thiab kev txhawb nqa CUSHION yuav tsum ruaj khov, tshwj xeeb tshaj yog nyob rau hauv cov yeeb nkab interface, uas yuav tsum tsis txhob dais shear quab yuam. Lub cib piers yuav tsum tau ua nrog cov cement mortar kom ntseeg tau tias muaj kev ntseeg siab thiab ruaj khov.
9
Post lub sij hawm: Sep-15-2022
