Kev siv thev naus laus zis: boiler yeeb nkab valve installation yeeb nkab valve installation yuav tsum tau them sai sai rau peb cov ntsiab lus hauv qab no

Kev siv thev naus laus zis: boiler yeeb nkab valve installation yeeb nkab valve installation yuav tsum tau them sai sai rau peb lub ntsiab lus hauv qab no (1) Ua ntej kev teeb tsa ntawm txhua yam li qub, xyuas cov hauv qab no: seb cov khoom ntim puas tau raws li cov qauv tsim thiab seb cov txheej txheem ntim puas yog. Valve qia ntawm packing foob yog corroded. Seb qhov hloov pauv hloov tau thiab qhov qhia tau yog lawm. 1. Tshawb xyuas lub valve ua ntej kev teeb tsa Tom qab lub valve raug xaiv kom raug, nws yuav tsum raug ntsia kom raug thiaj li ua kom nws cov txiaj ntsig zoo tshaj plaws. Tab sis lub valve yuav tsum tau nruab ua ntej kev soj ntsuam thiab tshuaj xyuas. (1) Txheeb xyuas cov hauv qab no ua ntej kev teeb tsa ntawm txhua hom li qub: Txawm tias cov khoom siv muab tub lim ua tau raws li cov qauv tsim, thiab seb cov txheej txheem muab tub lim puas yog. Valve qia ntawm packing foob yog corroded. Seb qhov hloov pauv hloov tau thiab qhov qhia tau yog lawm. Casting valve zoo li tsis pom kev tsim khoom tsis raug. (2) Lub nruj yuav tsum tau soj ntsuam ua ntej installation Raws li ib tug kaw tivthaiv ntawm lub valve (ua raws li ib tug cais muaj nuj nqi), yuav tsum tau muab ntsia ua ntej qhov kev ntsuas nruj, xyuas lub rooj zaum thiab lub valve core, npog thiab packing chamber ntawm kev sib txuas ntawm nruj. Kev ntsuas nruj ntawm lub valve yuav tsum tau ua ntawm 1.25 npaug ntawm lub siab ntawm lub npe phaj. Rau lub qhov rooj ruaj ntseg los yog nominal siab yog tsawg dua los yog sib npaug rau 0.6Mpa thiab nominal txoj kab uas hla yog ntau dua los yog sib npaug rau 800mm ntawm lub valve, xim luam ntawv yuav siv tau los xyuas qhov nruj ntawm lub valve core sealing nto. Rau qhov loj txoj kab uas hla welded li qub nrog nominal txoj kab uas hla ntau dua los yog sib npaug zos rau 600mm, roj los yog dej seepage yuav siv tau es tsis txhob ntawm cov dej siab nruj ntsuas. Ua ntej qhov kev ntsuam xyuas valve nruj, nws yog nruj me ntsis txwv tsis pub muaj roj thiab lwm yam txheej txheej ntawm qhov sib txuas. Valve nruj hydraulic kuaj yuav tsum ua raws li cov chaw tsim khoom cov kev cai, kev xeem ntawm lub ntiaj teb valve, dej yuav tsum tau qhia los ntawm sab saum toj ntawm lub valve disc; Rau kev ntsuam xyuas ntawm lub rooj vag valve, lub valve yuav tsum raug kaw thiab lub sealing nto yuav tsum tau kuaj xyuas. Tom qab qhov kev ntsuas nruj ntawm lub valve yog tsim nyog, lub valve yuav tsum raug kaw thiab lub sealing nto yuav tsum tau kuaj xyuas. (3) Kev kuaj xyuas qhov chaw yuav tsum tau ua ua ntej kev teeb tsa Lub siab tsis tshua muaj valve yuav tsum tau kuaj xyuas kom nruj tsis pub tsawg dua 10% (tsawg kawg ib qho) hauv txhua pawg (tib lub chaw tsim khoom, tib lub ntsiab lus, tib qauv). Yog tias nws tsis tsim nyog, nws yuav tsum tau tshuaj xyuas ib qho los ntawm ib qho yog tias nws tseem tsis tsim nyog tom qab random tshuaj xyuas los ntawm 20%. Valves rau cov kav dej siab yuav tsum tau kuaj xyuas kom nruj ib los ntawm ib qho. (4) Disassembly tshuaj xyuas valve ua ntej installation Cov nram qab no li qub yuav tsum tau disassembled thiab tshuaj xyuas ua ntej installation: a. Valves tsim los rau kub siab tshaj los yog sib npaug rau 450 ℃. b. Kev nyab xeeb thiab throttle li qub. c. Valves nrog kev ntsuas nruj nruj. Ua ntej lub valve disassembly, cov av qias neeg yuav tsum tau ntxuav, txwv tsis pub, kev qhib thiab kaw kev ua haujlwm thiab disassembly yuav tsum tsis txhob nqa tawm. Thaum lub valve ntawm cov qauv tshwj xeeb yog disassembled thiab tshuaj xyuas, lub disassembly yuav tsum tau nqa tawm raws li lub disassembly ib ntus teev los ntawm cov chaw tsim tshuaj paus los tiv thaiv kev puas tsuaj rau cov khoom los yog cuam tshuam rau tus kheej kev nyab xeeb. Cov kev kuaj hauv qab no yuav tsum tau ua rau ntawm lub valve disintegrated: a. Sab hauv ntawm alloy steel li qub yuav tsum tau tshuaj xyuas los ntawm spectra (tsis muaj cov cim yuav tsum tau ua rau ntawm qhov chaw, tab sis cov txiaj ntsig tshuaj xyuas yuav tsum tau sau tseg). b. Seb lub rooj zaum valve yog ruaj khov nrog lub plhaub valve, thiab seb puas muaj qhov tshwm sim xoob. c. Txawm hais tias qhov sib koom ua ke ntawm cov tub ntxhais valve thiab lub rooj zaum valve yog sib xws, thiab seb qhov sib koom ua ke puas muaj qhov tsis zoo. d. Seb lub qia yog flexibly txuas nrog lub spool. e. Txawm hais tias lub qia valve yog khoov, corroded, seb lub qia valve thiab lub caj pas ntim khoom haum ua ke kom zoo, thiab seb cov xov hlau ntawm lub qia valve puas tawg los yog tsis. f. Kev sib koom ntawm flange lub ntsej muag ntawm valve npog. g. Txheeb xyuas qhov qhib thiab kaw stroke thiab qhov chaw nres nkoj ntawm lub valve, thiab kos nws kom deb li deb tau. (5) Lub valve yuav tsum ua kom tau raws li qhov yuav tsum tau ua hauv qab no tom qab kev tshuaj xyuas kev puas tsuaj thiab tshem tawm qhov tsis xws luag Cov khoom siv ntawm cov hlau alloy steel ua tau raws li cov qauv tsim. Sib dhos kom raug, txav mus yooj yim, thiab qhov qhib qhov taw qhia qhia kom raug. Cov specifications thiab zoo ntawm gasket thiab packing ua tau raws li cov kev cai. Sau cov ntaub ntawv ntim kom raug thiab txiav cov interfaces rau hauv kab pheeb ces kaum qhov. Lub interfaces ntawm txhua txheej yuav tsum staggered. Ntim yuav tsum tau compressed kom nruj, thiab tsis txhob cuam tshuam lub qia qhib thiab kaw. (6) Valves ntawm cov roj system. Valves siv nyob rau hauv cov roj systems yuav tsum tau ntxuav nyob rau hauv lawv cov ntws los ntawm qhov chaw, xuab zeb thiab xim yuav tsum tau muab tshem tawm, thiab roj resistant lauj kaub cov hauv paus hniav thiab gaskets yuav tsum tau hloov. (7) Valve reassembly tshuaj xyuas thiab tshuaj xyuas Thaum lub rooj vag valve thiab lub ntiaj teb valve tau rov ua dua tom qab disassembled thiab tsim nyog, lub disc yuav tsum nyob rau hauv qhov chaw qhib ua ntej lub valve npog ntsia liaj qhov rooj yuav tsum nruj. Lub valve yuav tsum tau kuaj kom nruj tom qab disassembly thiab reassembly. Kev khiav hauj lwm mechanism thiab kis tau tus mob ntawm lub valve yuav tsum tau soj ntsuam thiab kho raws li tus tsim yuav tsum tau kom ua tau yooj yim txiav txim thiab raug cov lus qhia. (8) Txhua yam li qub, thaum cov chaw tsim khoom ua kom cov khoom zoo thiab muab cov khoom lag luam zoo thiab siv lav, tsis txhob ua kom tawg thiab nruj kev soj ntsuam, txwv tsis pub yuav tsum tau kuaj thiab kuaj. Ob, valve installation txheej txheem Qhov zoo ntawm valve installation ncaj qha cuam tshuam rau kev siv, yog li ceev faj yuav tsum tau them rau nws. (1) Kev taw qhia thiab txoj hauj lwm Cov kev taw qhia ntawm lub valve. Ntau lub valve muaj kev ncaj ncees, xws li lub ntiaj teb valve, lub valve valve, lub siab txo valve, kos valve, thiab lwm yam., yog tias kev teeb tsa rov qab, nws yuav cuam tshuam rau kev siv thiab lub neej (xws li lub valve), lossis tsis ua haujlwm tag nrho ( xws li lub siab txo valve), thiab txawm ua rau muaj kev phom sij (xws li kos valve). General li qub muaj cov cim qhia ntawm lub cev valve; Yog tias tsis yog, nws yuav tsum raug txheeb xyuas raws li txoj cai ua haujlwm ntawm lub valve. Lub valve chamber ntawm lub ntiaj teb valve tsis zoo sib xws, cov kua dej yuav tsum cia nws los ntawm hauv qab mus rau qhov chaw nres nkoj valve, kom cov dej tsis kam yog me me (txiav txim siab los ntawm cov duab), qhib lub zog txuag (vim tias qhov nruab nrab siab nce) , kaw tom qab qhov nruab nrab tsis siab packing, yooj yim kho, qhov no yog lub ntiaj teb valve tsis tuaj yeem ntsia rov qab qhov tseeb. Lwm cov li qub kuj muaj lawv tus yam ntxwv. Valve installation txoj hauj lwm Valve installation txoj hauj lwm, yuav tsum yooj yim rau kev khiav lag luam; Kev teeb tsa raws sij hawm yog qhov nyuaj ib ntus, tab sis kuj yog rau kev ua haujlwm ntev ntawm tus neeg teb xov tooj. Valve handwheel handwheel zoo dua nrog lub hauv siab (feem ntau 1.2m deb ntawm lub chaw ua haujlwm), yog li. Nws yooj yim dua rau qhib thiab kaw lub valve. Kev tsaws valve handwheel yuav tsum tau nce siab, tsis txhob qaij, kom tsis txhob ua haujlwm txawv txawv. Tawm tsam phab ntsa thiab tiv thaiv lub valve ntawm cov khoom siv, kuj yuav tsum muaj chaw rau tus neeg teb xov tooj sawv ntsug. Txhawm rau kom tsis txhob ua haujlwm ntawm lub ntuj, tshwj xeeb tshaj yog cov kua qaub thiab lub hauv paus, cov tshuaj lom neeg tawm, txwv tsis pub nws tsis muaj kev nyab xeeb. A. Lub rooj vag valve yuav tsum tsis txhob thim rov qab (uas yog, lub log hauv qab), txwv tsis pub qhov nruab nrab yuav khaws cia rau hauv lub valve npog qhov chaw kom ntev, yooj yim rau corrosion ntawm qia, thiab rau qee cov txheej txheem yuav tsum taboo, tib lub sijhawm nws yog qhov tsis yooj yim heev los hloov cov ntim khoom. b. Qhib qia rooj vag valve, tsis txhob nruab underground, txwv tsis pub vim damp corrosion raug qia. c. Nqa daim tshev valve, thaum txhim kho kom ntseeg tau tias lub disc ntsug, kom hloov tau yooj yim. d. Lub viav vias kos valve, thaum ntsia los xyuas kom meej tias tus pin theem, kom lub viav vias hloov tau yooj yim. e. Lub siab txo valve yuav tsum tau muab ntsia rau ntawm kab rov tav yeeb nkab, thiab yuav tsum tsis txhob qaij nyob rau hauv ib qho kev taw qhia. (2) Cov txheej txheem kev teeb tsa yuav tsum tau saib xyuas thaum lub sijhawm teeb tsa thiab kev tsim kho kom tsis txhob cuam tshuam li qub uas ua los ntawm cov khoom tawg. Ua ntej kev teeb tsa, lub valve yuav tsum tau kuaj xyuas, xyuas cov kev qhia tshwj xeeb, txheeb xyuas seb puas muaj kev puas tsuaj, tshwj xeeb tshaj yog rau lub valve qia, tab sis kuj tig ob peb zaug kom pom seb nws puas yog skewed, vim tias nyob rau hauv cov txheej txheem ntawm kev thauj mus los, nws yooj yim rau pob. lub pob valve qia, tab sis kuj cov khib nyiab hauv lub valve. Thaum nqa lub valve, txoj hlua yuav tsum tsis txhob muab khi rau ntawm tes los yog qia kom tsis txhob muaj kev puas tsuaj rau cov khoom no, yuav tsum tau khi rau lub flange. Rau lub valve txuas nrog lub raj xa dej, nco ntsoov ntxuav, tuaj yeem ua cua compressed kom tshem tawm cov hlau oxide scraps, xuab zeb, vuam slag thiab lwm yam khib nyiab. Cov sundries no tsis yog yooj yim rau khawb qhov sealing nto ntawm lub valve, ntawm cov khoom loj ntawm sundries (xws li vuam slag) kuj tuaj yeem thaiv lub valve me me thiab ua rau nws tsis ua haujlwm. Thaum txhim kho cov ntsia hlau valve, lub sealing packing (xov thiab txhuas roj los yog polytetrafluoroethylene raw khoom siv txoj siv) yuav tsum tau qhwv rau ntawm cov yeeb nkab xov, tsis txhob nkag mus rau hauv lub valve, thiaj li tsis mus valve nco ntim, cuam tshuam cov khiav ntawm cov xov xwm. Thaum txhim kho flange li qub, ceev faj kom nruj cov bolts symmetrically thiab tusyees. Valve flange thiab cov yeeb nkab flange yuav tsum ua tib zoo sib xws, tsim nyog tshem tawm, kom tsis txhob muaj siab dhau, lossis txawm tias tawg ntawm lub valve, rau cov ntaub ntawv nkig thiab lub zog tsis siab, tshwj xeeb tshaj yog them nyiaj rau lub valve. Cov li qub uas yuav tsum tau welded nrog cov kav dej yuav tsum yog qhov chaw-welded ua ntej, ces qhov chaw kaw yuav tsum qhib tag nrho, thiab tom qab ntawd welded tuag. (3) Qhov chaw rwb thaiv tsev Valve Qee qhov valve kuj xav tau kev tiv thaiv sab nraud, uas yog, rwb thaiv tsev thiab cua txias. Cov kab hluav taws xob cua sov qee zaum ntxiv rau cov txheej rwb thaiv tsev. Seb lub valve yuav tsum tau insulated los yog cia txias yuav tsum tau txiav txim raws li qhov yuav tsum tau ntau lawm. Kev tiv thaiv lub hauv paus ntsiab lus: qhov nruab nrab hauv lub valve txo qhov kub thiab txias ntau dhau, nws yuav cuam tshuam rau kev tsim khoom lossis khov lub valve, nws xav tau kev txuag hluav taws xob lossis txawm tias muaj cua sov; Qhov twg lub valve raug nthuav tawm, cuam tshuam rau kev tsim khoom lossis ua rau Frost thiab lwm yam tshwm sim tsis zoo, nws yog ib qho tsim nyog yuav tsum ua kom txias. Rau kev nyab xeeb ntawm tus kheej thiab kev ua haujlwm zoo, thaum lub valve kub ntawm lub tshuab hluav taws xob ntau tshaj 50 ℃, nws yuav tsum tau nruab nrog cov khoom siv thermal rwb thaiv tsev. Yog tias cov dej tsis siv ntev, lub qhov cub valve yuav tsum tso dej tawm. (4) Bypass thiab ntsuas Ib txhia li qub ntxiv rau qhov tsim nyog cov chaw tiv thaiv, tab sis kuj muaj bypass thiab instrumentation, bypass installation kom yooj yim txij nkawm. Lwm yam li qub, kuj muaj kev teeb tsa ntawm bypass. Seb puas yuav nruab lub bypass nyob ntawm seb lub valve mob, qhov tseem ceeb thiab cov khoom yuav tsum tau ua. (5) Kev hloov ntawm cov pob khoom Yog vim li cas rau packing hloov a. Cov khoom lag luam li qub, qee qhov kev ntim khoom tsis zoo, qee qhov nrog kev siv xov xwm tsis sib xws, yuav tsum tau hloov cov ntim khoom. b. Valve chaw tsim khoom tsis tuaj yeem xav txog kev siv nruab nrab siv los ntawm chav tsev, lub thawv ntim khoom ib txwm muaj cov hauv paus zoo tib yam, tab sis thaum siv, cov ntim khoom yuav tsum tau hloov mus rau qhov nruab nrab. Packing hloov txheej txheem a. Thaum hloov lub muab tub lim, nias nws nyob rau hauv ib puag ncig los ntawm ib puag ncig. b. Nws yog qhov tsim nyog rau txhua txoj hlua khi yuav tsum yog 45 °, thiab cov seam puag ncig yuav tsum tau staggered 180 °. c. Qhov siab packing yuav tsum xav txog chav tsev kom txuas ntxiv nias ntawm lub caj pas. Tam sim no, qhov tob ntawm lub packing chamber nyob rau hauv lub caj pas yuav tsum tsim nyog, uas yuav ua tau 10% ~ 20% ntawm tag nrho cov qhov tob ntawm lub packing chamber. d. Rau siab xav li qub, lub kaum sab xis yog 30 °. Cov pob qij txha ntawm cov nplhaib yog staggered los ntawm 120 °. E. ua cov khoom ntim saum toj no, tuaj yeem ua raws li qhov xwm txheej tshwj xeeb, siv cov roj hmab o-ntiv nplhaib (natural rubber resistant rau lub hauv paus tsis muaj zog hauv qab 60 ℃, nitrile butadiene roj hmab roj resistant nyob rau hauv 80 ℃, fluorine roj hmab tsis kam mus rau ntau yam corrosive nruab nrab. nyob rau hauv 150 ℃) peb lub puab tsaig ptfe nplhaib (hauv qab 200 ℃) muaj zog corrosive nruab nrab tsis kam nylon lub tais nplhaib (ammonia hauv qab 120 ℃, alkali resistant) tsim muab tub lim. Ib txheej ntawm polytetrafluoroethylene (PTFE) cov ntaub ntawv raw khoom yog qhwv ib ncig ntawm cov asbestos disc, uas tuaj yeem txhim kho cov nyhuv sealing thiab txo cov electrochemical corrosion ntawm lub valve qia. f. Thaum nias lub pob, tig lub valve qia tib lub sij hawm kom lub voj voog tsis sib xws thiab tiv thaiv kom tsis txhob tuag. Tighten lub caj pas nrog txawm quab yuam thiab tsis txhob qaij. Cov yeeb nkab valve installation yuav tsum tau xyuam xim rau cov nram qab no peb lub ntsiab lus Pipe valve installation yuav tsum xyuam xim rau cov nram qab no peb cov ntsiab lus Ua ntej, peb yuav tsum xyuam xim rau xyuas ua ntej installation 1. Ua tib zoo xyuas seb lub valve qauv thiab specifications raws li qhov yuav tsum tau ntawm daim duab. 2. Txheeb xyuas seb qia thiab disc qhib tau yooj yim, thiab seb lawv puas tau daig lossis skewed. 3. Xyuas seb lub valve puas puas thiab seb cov xov ntawm lub valve puas yog thiab tsis zoo. 4. Txheeb xyuas seb qhov sib xyaw ntawm lub rooj zaum thiab lub valve lub cev puas ruaj khov, disc thiab lub rooj zaum, npog thiab lub valve lub cev, qia thiab disc txuas. 5. Xyuas seb lub valve padding, packing thiab fasteners (bolts) puas haum rau qhov yuav tsum tau ua ntawm qhov nruab nrab ua haujlwm. 6. Lub qub los yog ntev siv lub siab txo valve yuav tsum tau muab tshem tawm, plua plav, xuab zeb thiab lwm yam khib nyiab yuav tsum tau ntxuav nrog dej. 7. Los ntawm lub hau npog, xyuas cov qib sealing, lub valve disc yuav tsum kaw kom nruj. 4. Cov ntsia hlau xov yuav tsum tau lav tsis tu ncua thiab qhwv nrog hemp, hmoov txhuas los yog polytetrafluoroethylene daim kab xev rau ntawm cov xov. Thaum screwing, tus ciaj ntswj yuav tsum tau daig rau hauv lub hexagonal valve lub cev ntawm ib kawg ntawm cov yeeb nkab. 5. Thaum txhim kho lub flange valve, ua tib zoo saib xyuas kom nruj qhov kev sib txuas bolt raws txoj kab pheeb ces kaum, thiab lub zog yuav tsum tsis sib xws thaum ntsia hlau los tiv thaiv lub gasket los ntawm deviating los yog ua rau deformation thiab kev puas tsuaj rau lub valve lub cev. 6. Lub valve yuav tsum tau kaw thaum lub sij hawm installation. Rau threaded li qub nyob ze rau ntawm phab ntsa, lub installation feem ntau yuav tsum tau tshem tawm cov qia, disc thiab tes log, tig. Disassembly yuav tsum tau nqa tawm tom qab twist lub tes log kom lub valve qhib.