1. Scope
Cov kev qhia tshwj xeeb suav nrog Txoj Kab Ntsig NPS 10 ~ NPS48, Chav Kawm Siab Siab (150LB ~ 300LB) flanged triple eccentric hlau foob npauj npaim li qub.
2. Cov khoom piav qhia
2.1 Kev cai lij choj
2.1.1 Tsim thiab tsim qauv: API 609
2.1.2 Xaus mus rau qhov kawg kev sib txuas tus qauv: ASME B16.5
2.1.3 Lub ntsej muag rau lub ntsej muag dimension tus qauv: API609
2.1.4 Cov qib siab-kub tus qauv: ASME B16.34
2.1.5 Kev tshuaj xyuas thiab kev sim (nrog rau kev sim hydraulic): API 598
2.2 Product General
Triple eccentric npauj npaim valve nrog ob chav hlau sealing yog ib qho ntawm BVMC cov khoom tseem ceeb, thiab dav siv hauv metallurgy, lub teeb kev lag luam, hluav taws xob fais fab, petrochemical, roj channel thiab lwm yam kev lag luam.
3. Cov yam ntxwv thiab kev siv
Cov qauv yog triple eccentric thiab hlau zaum.Nws muaj kev sealing zoo nyob rau hauv qhov chaw ntawm chav tsev kub thiab / lossis kub kub.Lub ntim me me, sib dua, qhib thiab kaw tau yooj yim thiab lub neej ua haujlwm ntev dua yog nws qhov pom tseeb zoo piv rau lub rooj vag li qub lossis lub ntiaj teb li qub.Nws yog dav siv hauv metallurgy, lub teeb kev lag luam, hluav taws xob fais fab, petrochemical, thee gas channel thiab lwm yam kev lag luam, kev siv kev nyab xeeb txhim khu kev qha, lub valve yog qhov kev xaiv zoo tshaj plaws ntawm kev lag luam niaj hnub.
4. Qauv
4.1 Triple eccentric hlau sealing npauj npaim valve raws li qhia hauv Sketch 1
Daim duab 1 Triple eccentric hlau sealing npauj npaim valve
5. Lub hauv paus ntsiab lus sealing:
Daim duab 2 Ib tug raug triple eccentric hlau sealing npauj npaim valve yog ib yam khoom BVMC, raws li qhia hauv daim duab 2.
(a) Cov yam ntxwv zoo: Qhov chaw sib hloov ntawm tus npauj npaim phaj (piv txwv li qhov chaw nruab nrab ntawm lub qhov rooj) yog tsim kom muaj kev tsis ncaj ncees A nrog rau lub phaj npauj npaim sealing nto, thiab qhov kev tsis ncaj ncees B nrog txoj kab nruab nrab ntawm lub cev valve.Thiab lub kaum sab xis βbe tsim los ntawm txoj kab nruab nrab ntawm lub ntsej muag lub ntsej muag thiab lub rooj zaum lub cev (piv txwv li, kab axial ntawm lub cev)
(b) Lub hauv paus ntsiab lus ntawm kev sib khi: Raws li ob chav eccentric npauj npaim valve, triple eccentric npauj npaim valve tsim lub Angleβ ntawm qhov nruab nrab ntawm lub rooj zaum thiab lub cev.Cov txiaj ntsig tsis zoo yog raws li qhia hauv daim duab 3 hla ntu.Thaum triple eccentric sealing npauj npaim valve nyob rau hauv txoj hauj lwm qhib tag nrho, tus npauj npaim phaj sealing nto yuav raug cais tawm ntawm lub rooj zaum valve.Thiab yuav muaj kev tshem tawm γ nruab nrab ntawm npauj npaim phaj sealing lub ntsej muag thiab lub cev sealing nto ib yam li ob chav eccentric npauj npaim valve.Raws li pom nyob rau hauv daim duab 4, vim yog tsim ntawm β lub kaum sab xis, lub kaum sab xisβ1 thiab β2 yuav tsim nyob nruab nrab ntawm txoj kab tangent ntawm disc rotation khiav thiab lub valve lub rooj sealing nto.Thaum qhib thiab kaw disc, npauj npaim phaj sealing nto yuav maj mam sib cais thiab compact, thiab ces tshem tawm tag nrho cov neeg kho tshuab hnav thiab puas.Thaum tawg qhib lub valve, lub disc sealing nto yuav cais tam sim ntawm lub rooj zaum valve.Thiab tsuas yog thaum lub sijhawm kaw tag nrho, lub disc yuav compact rau hauv lub rooj zaum.Raws li pom nyob rau hauv daim duab 4, vim yog tsim ntawm lub kaum sab xis β1 thiab β2, thaum lub npauj npaim valve kaw, lub foob siab raug tsim los ntawm lub valve ncej tsav torque tiam tsis yooj ntawm npauj npaim valve lub rooj zaum.Nws tuaj yeem tsis tsuas yog tshem tawm qhov ua tau zoo ntawm kev foob txo thiab tsis ua haujlwm los ntawm lub rooj zaum cov khoom laus, txias txaus, elastic invalidation yam, thiab tuaj yeem hloov kho dawb los ntawm kev tsav lub zog, kom lub triple eccentric npauj npaim valve sealing kev ua tau zoo thiab kev ua haujlwm lub neej yuav zoo heev. txhim kho.
Daim duab 2 Triple eccentric ob-txoj kev hlau kaw npauj npaim valve
Daim duab 3 Daim duab rau triple eccentric ob chav hlau sealing npauj npaim valve ntawm lub xeev qhib
Daim duab 4 Daim duab rau triple eccentric ob chav hlau sealing npauj npaim valve ntawm lub xeev
6.1 Kev teeb tsa
6.1.1 Ua tib zoo xyuas cov ntsiab lus ntawm lub valve nameplate ua ntej txhim kho, xyuas kom meej tias hom, qhov loj me, cov khoom siv lub rooj zaum thiab qhov kub ntawm lub valve yuav ua raws li cov kev pabcuam ntawm cov kav dej.
6.1.2 Kev kuaj xyuas zoo dua tag nrho cov bolts hauv kev sib txuas ua ntej kev teeb tsa, xyuas kom tseeb tias nws tau nruj sib npaug.Thiab xyuas seb puas compression thiab sealing ntawm packing.
6.1.3 Txheeb xyuas lub valve nrog cov cim ntws, xws li qhia txog kev khiav,
Thiab kev txhim kho lub valve yuav tsum ua raws li cov kev cai ntawm cov dej ntws.
6.1.4 Lub raj xa dej yuav tsum tau muab ntxuav thiab tshem tawm nws cov roj, vuam slag thiab lwm yam impurities ua ntej kev teeb tsa.
6.1.5 Valve yuav tsum tau muab tshem tawm maj mam, txwv tsis pub nws ntuav thiab tso tseg.
6.1.6 Peb yuav tsum tshem cov plua plav npog ntawm qhov kawg ntawm lub valve thaum txhim kho lub valve.
6.1.7 Thaum txhim kho lub valve, lub thickness rau flange gasket yog ntau tshaj 2 hli thiab ntug hardness yog ntau tshaj 70 PTFE los yog winding gasket, flange ntawm lub connecting bolts yuav tsum nruj diagonally.
6.1.8 Lub looseness ntawm packing tej zaum yuav tshwm sim los ntawm kev hloov ntawm kev co thiab kub nyob rau hauv kev thauj mus los, thiab ceev ceev ntawm lub packing caj pas yog hais tias muaj leakage nyob rau hauv lub qia sealing tom qab installation.
6.1.9 Ua ntej txhim kho lub valve, qhov chaw ntawm pneumatic actuator yuav tsum tau teeb tsa, txhawm rau ua kom muaj kev ua haujlwm zoo thiab kev saib xyuas raws li kev npaj txhij txog.Thiab tus actuator yuav tsum tau kuaj xyuas thiab kuaj ua ntej muab tso rau hauv kev tsim khoom.
6.1.10 Kev tshuaj xyuas tuaj yuav tsum ua raws li cov qauv tsim nyog.Yog tias txoj kev tsis raug lossis tsim los ntawm tib neeg, BVMC Lub Tuam Txhab yuav tsis muaj lub luag haujlwm.
6.2 Cia thiab Kho
6.2.1 Qhov kawg yuav tsum tau npog nrog cov plua plav npog hauv chav qhuav thiab qhov cua, kom ntseeg tau tias qhov huv ntawm lub valve kab noj hniav.
6.2.2 Thaum lub valve rau lub sijhawm ntev rov qab siv dua, cov ntim khoom yuav tsum tau kuaj xyuas seb nws puas siv tsis tau thiab sau cov roj nplua nyeem rau hauv cov khoom sib hloov.
6.2.3 Cov li qub yuav tsum tau siv thiab khaws cia hauv lub sijhawm lav (raws li daim ntawv cog lus), suav nrog kev hloov gasket, ntim thiab lwm yam.
6.2.4 Cov kev ua haujlwm ntawm lub valve yuav tsum ua kom huv si, vim tias nws tuaj yeem ua haujlwm ntev.
6.2.5 Li qub yuav tsum tau tshuaj xyuas thiab tu tsis tu ncua hauv kev khiav hauj lwm los tiv thaiv corrosion thiab xyuas kom meej tias cov cuab yeej zoo.
Yog tias qhov nruab nrab yog dej lossis roj, nws tau qhia tias cov valve yuav tsum tau kuaj xyuas thiab tswj xyuas txhua peb lub hlis.Thiab yog tias qhov nruab nrab yog corrosive, nws tau hais tias tag nrho cov li qub los yog ib feem ntawm cov li qub yuav tsum tau kuaj xyuas thiab tswj xyuas txhua lub hlis.
6.2.6 Cua lim nyem-siab valve yuav tsum ntws tsis tu ncua, paug paug, hloov cov lim lim.Ua kom huab cua huv thiab qhuav kom tsis txhob muaj kuab paug pneumatic Cheebtsam, ua rau tsis ua haujlwm.(Saib "kev qhia ua haujlwm pneumatic actuator")
6.2.7 Lub tog raj kheej, cov khoom siv pneumatic thiab cov kav dej yuav tsum tau kuaj xyuas kom zoo thiab tsis tu ncua kom txwv tsis pub cov pa tawm (Saib "cov lus qhia ua haujlwm pneumatic actuator")
6.2.8 Thaum kho lub li qub yuav tsum yaug qhov chaw dua, tshem tawm lub cev txawv teb chaws, stains thiab rusty qhov chaw.Txhawm rau hloov cov gaskets puas thiab ntim, sealing nto yuav tsum tau kho.Kev ntsuas hydraulic yuav tsum tau ua dua tom qab kho, tsim nyog siv tau.
6.2.9 Kev ua haujlwm ib feem ntawm lub valve (xws li qia thiab ntim cov foob) yuav tsum ua kom huv si thiab so cov plua plav tawm los tiv thaiv fray thiab corrosion.
6.2.10 Yog hais tias muaj cov xau nyob rau hauv lub ntim thiab cov packing gland ceev yuav tsum tau nruj nreem ncaj qha los yog hloov lub ntim raws li qhov teeb meem.Tab sis Nws tsis raug tso cai los hloov cov ntim nrog lub siab.
6.2.11 Yog hais tias lub valve tsis daws teeb meem hauv online lossis rau lwm yam teeb meem kev khiav hauj lwm, thaum tshem tawm lub valve yuav tsum ua raws li cov kauj ruam hauv qab no:
a. Ua tib zoo saib xyuas kev nyab xeeb: rau koj txoj kev nyab xeeb, tshem tawm lub valve ntawm cov yeeb nkab ua ntej yuav tsum nkag siab tias qhov nruab nrab hauv cov kav dej yog dab tsi.Koj yuav tsum hnav cov cuab yeej tiv thaiv kev ua haujlwm los tiv thaiv qhov nruab nrab hauv cov kav dej puas.Nyob rau tib lub sij hawm los xyuas kom meej tias cov kav dej nruab nrab siab twb.Lub valve yuav tsum kaw tag nrho ua ntej tshem lub valve.
b. Tshem tawm cov khoom siv pneumatic (xws li lub tes tsho txuas, Pom "cov lus qhia ua haujlwm pneumatic actuator") yuav tsum tau ceev faj ua haujlwm kom tsis txhob muaj kev puas tsuaj los ntawm qia thiab pneumatic ntaus ntawv;
c.Lub nplhaib sealing ntawm disc thiab lub rooj zaum yuav tsum tau kuaj xyuas yog tias lawv muaj khawb thaum npauj npaim valve qhib.Yog tias muaj me ntsis khawb rau lub rooj zaum, nws tuaj yeem siv daim ntaub emery lossis roj rau ntawm qhov chaw sib khi rau kev hloov kho.Yog tias ob peb qhov sib sib zog nqus khawb tshwm, qhov kev ntsuas tsim nyog yuav tsum tau ua los kho, lub npauj npaim valve tuaj yeem siv tom qab kuaj tau tsim nyog.
d.Yog hais tias lub qia ntim yog to, lub packing caj pas yuav tsum tshem tawm, thiab xyuas cov qia thiab packing nrog nto, yog qia muaj khawb, lub valve yuav tsum sib sau ua ke tom qab kho.yog tias cov khoom puas lawm, cov packing yuav tsum tau hloov.
e.Yog hais tias lub tog raj kheej muaj teeb meem, yuav tsum xyuas cov pneumatic Cheebtsam, xyuas kom meej tias cov pa pa ntws thiab cua siab, electromagnetic reversing valve yog qhov qub.Pom "kev qhia ua haujlwm pneumatic actuator")
f.Thaum cov roj tso rau hauv lub tshuab pneumatic, nws ua kom lub tog raj kheej tsis muaj sab hauv thiab sab nraud tsis muaj qhov to.Yog tias cov khoom siv pneumatic foob puas tuaj yeem ua rau lub zog ua haujlwm poob qis, yog li tsis ua raws li npauj npaim valve qhib thiab kaw haujlwm, yuav tsum ua tib zoo saib xyuas thiab hloov qhov chaw.
Pneumatic npauj npaim valve lwm qhov feem ntau tsis kho.Yog tias qhov kev puas tsuaj loj heev, yuav tsum hu rau lub Hoobkas lossis xa mus rau lub Hoobkas saib xyuas.
6.2.12 Test
Lub valve yuav tsum yog lub siab ntsuas tom qab lub valve kho qhov kev kuaj raws li cov qauv tsim nyog.
6.3 Kev qhia ua haujlwm
6.3.1 Pneumatic ua haujlwm valve nrog lub tog raj kheej ntaus ntawv tsav tsheb yuav ua rau lub disc tig 90 ° qhib lossis kaw lub valve.
6.3.2 Cov lus qhia qhib-kaw ntawm pneumatic actuated npauj npaim valve yuav tsum raug cim los ntawm qhov taw qhia txoj haujlwm ntawm lub tshuab pneumatic.
6.3.3 Npauj npaim valve nrog truncation thiab kho qhov kev txiav txim yuav siv tau raws li ib tug kua hloov thiab ntws tswj.Nws feem ntau tsis pub dhau lub siab - qhov kub thiab txias ciam teb qhov xwm txheej los yog nquag hloov siab thiab qhov kub thiab txias
6.3.4 Npauj npaim valve muaj lub peev xwm ntawm kev ua haujlwm siab qhov sib txawv, tsis txhob cia npauj npaim valve qhib nyob rau hauv qhov sib txawv siab txawm tias nyob rau ntawm qhov sib txawv ntawm qhov kub siab txuas ntxiv mus.Tsis tas li ntawd tej zaum yuav ua rau puas tsuaj, lossis txawm tias muaj kev nyab xeeb loj thiab kev puas tsuaj.
6.3.5 Cov pneumatic li qub siv ntau zaus, thiab kev txav mus los thiab lubrication tej yam kev mob yuav tsum tau xyuas tsis tu ncua.
6.3.6 Pneumatic ntaus ntawv clockwise rau npauj npaim valve kaw, counterclockwise rau npauj npaim valve qhib.
6.3.7 Kev siv lub tshuab pneumatic npauj npaim valve yuav tsum tau them sai sai rau cov huab cua huv si, cov pa cua siab yog 0.4 ~ 0.7 Mpa.Txhawm rau tswj cov huab cua qhib, tsis pub thaiv cov cua nkag thiab cua ntws.Ua ntej ua haujlwm, nws yuav tsum tau nkag mus rau hauv cov cua compressed kom saib xyuas yog tias lub pneumatic npauj npaim valve txav yog qhov qub.xyuam xim rau lub pneumatic npauj npaim valve qhib los yog kaw, txawm tias disc yog nyob rau hauv tag nrho qhib los yog kaw txoj hauj lwm.Yuav tsum xyuam xim rau txoj hauj lwm ntawm lub valve thiab lub tog raj kheej txoj hauj lwm zoo ib yam.
6.3.8 Cov qauv ntawm pneumatic actuators crank caj npab yog lub taub hau duab plaub, siv rau phau ntawv ntaus ntawv.Thaum qhov kev huam yuaj tshwm sim, nws tuaj yeem tshem tawm cov pa xa hluav taws xob ncaj qha nrog lub ciaj ntswj uas qhov kev ua haujlwm ntawm phau ntawv tuaj yeem ua tiav.
7. Qhov yuam kev, laj thawj thiab kev daws teeb meem (Saib Tab 1)
Tab 1 Cov teeb meem tshwm sim, ua rau thiab kev daws teeb meem
| yuam kev | Ua rau tsis ua hauj lwm | Kev daws |
| Lub valve txav mus rau li qub yog qhov nyuaj, tsis hloov pauv | 1. Actuator tsis ua haujlwm2.Qhib lub torque loj dhau 3.Huab cua siab tsawg dhau lawm 4. Lub tog raj kheej to | 1. Kho thiab xyuas cov hluav taws xob hluav taws xob thiab hluav taws xob hluav taws xob rau cov khoom siv pneumatic2.Kev txo qhov chaw thau khoom thiab xaiv cov khoom siv pneumatic kom raug 3.Heighten cua siab 4. Txheeb xyuas qhov kev sib khi rau lub tog raj kheej lossis qhov chaw sib koom ua ke |
| Stem Packing Leakage | 1. Packing caj pas bolts yog xoob2.Kev puas tsuaj packing los yog qia | 1. Tighten caj pas bolts2.Hloov cov pob los yog qia |
| Cov dej ntws tawm | 1.Txoj haujlwm kaw rau tus thawj coj ntawm kev sib khi tsis raug | 1. Kho lub actuator kom lub kaw txoj hauj lwm rau deputy ntawm sealing yog lawm |
| 2. Kev kaw tsis ncav cuag txoj haujlwm | 1.Kuaj xyuas cov kev taw qhia ntawm qhib-kaw yog nyob rau hauv qhov chaw2.Kho raws li cov actuator specifications, kom cov kev taw qhia yog synchronized nrog lub xeev ntawm qhov tseeb qhib3.Tshawb xyuas cov khoom ntes yog nyob rau hauv cov kav dej | |
| 3. Qhov chaw ntawm lub valve puas①Lub rooj puas②Disc puas | 1. Hloov lub rooj zaum 2.Hloov disc | |
| Actuator lapse | 1.Qhov tseem ceeb puas thiab poob 2.Qhov nres tus pin txiav tawm | 1. Hloov tus yuam sij ntawm qia thiab tus actuator2.Hloov tus pin nres |
| Lub tshuab pneumatic tsis ua haujlwm | Saib "valve pneumatic device specifications" | |
Nco tseg: Cov neeg ua haujlwm kho yuav tsum muaj kev paub txog thiab kev paub dhau los.
Post lub sij hawm: May-19-2022