Daim ntawv thov Scope thiab Technical specifications ntawm lub hwj chim chaw nres tsheb li qub (2)

Daim ntawv thov Scope thiab Technical specifications ntawm lub hwj chim chaw nres tsheb li qub (2)

Valve feem ntau ntsib qhov tsis ua tiav ntawm 10 cov lus qhia tswv yim, hauv qab no peb yuav hais kom meej.
1 Vim li cas thiaj yuav tsum tau txiav tawm valve kom nruj li qhov ua tau?
Txiav tawm lub valve to kom tsawg li tsawg tau, mos seal valve to kuj tsawg, txiav tawm cov nyhuv ntawm chav kawm, tab sis tsis hnav tsis kam, kev ntseeg tsis zoo. Los ntawm cov xau thiab me me, sealing thiab txhim khu kev qha ob txheej txheem, mos foob txiav tawm yog zoo dua li tawv foob txiav tawm. Xws li tag nrho-function ultra-light regulating valve, kaw thiab stacked nrog hnav-resistant alloy tiv thaiv, muaj kev ntseeg siab, leakage npaum li cas ntawm 10-7, muaj peev xwm ua tau raws li qhov yuav tsum tau ntawm lub cut-off valve.
2. Vim li cas ho tsis tuaj yeem siv ob lub foob valve los ua qhov txiav tawm?
Qhov kom zoo dua ntawm ob lub rooj vag valve spool yog lub zog sib npaug ntawm cov qauv, tso cai rau qhov sib txawv ntawm lub siab loj, thiab nws qhov tsis zoo yog tias ob lub sealing qhov chaw tsis tuaj yeem sib cuag zoo tib lub sijhawm, ua rau kom muaj dej loj. Yog tias nws yog siv dag zog thiab yuam kom txiav tawm lub ntees, pom tseeb tias cov nyhuv tsis zoo, txawm tias nws tau ua ntau yam kev txhim kho (xws li ob lub foob lub tes tsho valve), nws tsis tsim nyog.
3. Vim li cas nws yooj yim rau oscillate thaum ob lub rooj zaum valve qhib me me?
Rau cov tub ntxhais ib leeg, thaum nruab nrab yog ntws qhib hom, lub valve stability yog zoo; Thaum qhov nruab nrab ntws kaw, qhov ruaj khov ntawm lub valve tsis zoo. Lub rooj zaum ob lub rooj zaum muaj ob lub spool, qhov qis qis yog nyob rau hauv qhov ntws kaw, lub spool sab sauv yog nyob rau hauv lub ntws qhib, yog li, nyob rau hauv lub me me qhib ua hauj lwm, lub ntws kaw hom spool yog ib qho yooj yim ua rau lub vibration ntawm lub valve. yog vim li cas vim li cas ob lub rooj zaum valve tsis tuaj yeem siv rau kev qhib me me.
4, Dab tsi ncaj stroke tswj valve thaiv kev ua haujlwm tsis zoo, Lub kaum sab xis stroke valve thaiv kev ua haujlwm zoo?
Ncaj stroke valve spool yog ntsug throttling, thiab qhov nruab nrab yog kab rov tav ntws mus rau hauv thiab tawm ntawm lub valve chamber flow channel yuav tsum tig rov qab, kom lub valve ntws txoj kev yuav nyuaj heev (zoo li inverted "S" hom). Nyob rau hauv txoj kev no, muaj ntau qhov chaw tuag, uas muab qhov chaw rau nag lossis daus ntawm qhov nruab nrab, thiab nyob rau lub sijhawm ntev, ua rau muaj kev thaiv. Kev taw qhia ntawm lub kaum sab xis stroke valve throttling yog kab rov tav kev taw qhia, qhov nruab nrab ntws hauv thiab tawm kab rov tav, thiab nws yooj yim tshem tawm qhov nruab nrab tsis huv. Nyob rau tib lub sijhawm, txoj kev khiav yog yooj yim, thiab qhov nruab nrab nag lossis daus qhov chaw me me, yog li lub kaum sab xis stroke valve muaj kev thaiv zoo.
5, vim li cas qhov ncaj stroke tswj valve qia yog nyias?
Ncaj nraim regulating valve nws muaj ib tug yooj yim mechanical txoj cai: loj zawv zawg kev sib txhuam, me me dov kev sib txhuam. Ncaj stroke valve qia nce thiab nqis txav, ntim me ntsis nias me ntsis, nws yuav muab lub valve qia qhwv nruj heev, tsim qhov sib txawv loj. Vim li no, lub qia valve yog tsim los me me, thiab cov khoom ntim feem ntau yog siv nrog me me coefficient ntawm kev sib txhuam PTFE packing, thiaj li yuav txo tau qhov backdifference, tab sis qhov teeb meem yog tias lub valve qia yog nyias, yooj yim rau khoov. , thiab lub neej ntim khoom luv luv. Txhawm rau daws qhov teeb meem no, txoj hauv kev zoo dua yog siv lub voj voog mus ncig, uas yog lub kaum sab xis stroke hom tswj lub valve, nws lub valve qia yog 2 ~ 3 zaug tuab dua li cov kab ncaj nraim valve qia, thiab kev xaiv ntawm lub neej ntev graphite muab tub lim. , qia tawv yog zoo, ntim lub neej ntev, kev sib txhuam torque me me, me me rov qab sib txawv.
6. Vim li cas qhov kev txiav tawm siab sib txawv ntawm lub kaum sab xis stroke valve loj?
Lub kaum sab xis stroke hom valve txiav tawm lub siab sib txawv yog qhov loj, vim hais tias qhov nruab nrab ntawm lub spool lossis valve phaj resultant quab yuam ntawm kev sib hloov ncej torque tsawg heev, yog li ntawd, nws muaj peev xwm tiv taus qhov sib txawv loj.
7. Vim li cas lub tes tsho valve hloov lub valve ib leeg thiab ob lub rooj zaum tab sis tsis ua tiav nws lub hom phiaj?
Lub tes tsho valve, uas tau tawm hauv xyoo 1960, tau siv dav hauv tsev thiab txawv teb chaws hauv xyoo 1970s. Hauv cov nroj tsuag petrochemical tau qhia hauv xyoo 1980s, lub tes tsho valve suav nrog qhov sib piv loj dua. Lub sijhawm ntawd, ntau tus neeg ntseeg tias lub tes tsho valve tuaj yeem hloov lub rooj zaum ib leeg thiab ob lub rooj zaum thiab dhau los ua lub cim thib ob ntawm cov khoom. Niaj hnub no, qhov no tsis yog li ntawd, ib lub rooj zaum valve, ob lub rooj zaum valve, lub tes tsho valve yog siv sib npaug. Qhov no yog vim hais tias lub tes tsho valve tsuas yog txhim kho daim ntawv throttling, kev ruaj ntseg thiab kev saib xyuas zoo dua li ib lub rooj zaum valve, tab sis nws qhov hnyav, thaiv thiab qhov taw qhia tawm yog ua raws li ib leeg thiab ob lub rooj zaum valve, yuav ua li cas hloov lub rooj zaum ib leeg thiab ob lub rooj zaum valve. ? Yog li, nws yuav tsum tau muab faib.
8. Vim li cas qhov kev pab cuam lub neej ntawm cov dej desalting nruab nrab lined nrog roj hmab npauj npaim valve thiab fluorine lined diaphragm valve luv?
Desalting dej nruab nrab muaj tsawg concentration ntawm acid los yog alkali, lawv muaj ib tug ntau dua corrosion rau roj hmab. Lub corrosion ntawm roj hmab yog yam ntxwv ntawm expansion, laus thiab tsis muaj zog. Kev siv cov nyhuv ntawm npauj npaim valve thiab diaphragm valve lined nrog roj hmab tsis zoo. Lub essence yog tias roj hmab tsis yog corrosion resistant. Tom qab cov roj hmab hauv ob sab phlu diaphragm valve tau txhim kho kom muaj kev tiv thaiv corrosion ntawm fluorine lined diaphragm valve, tab sis lub diaphragm ntawm fluorine lined diaphragm valve tsis tuaj yeem sawv ntsug thiab nqis folding thiab tawg, ua rau kev puas tsuaj, lub neej ntawm lub valve yog luv dua. Tam sim no txoj kev zoo dua yog siv dej los kho lub pob valve, nws tuaj yeem siv tau 5 mus rau 8 xyoo.
9, vim li cas hauv pneumatic valve piston actuator siv yuav ntau dua?
Rau pneumatic valve, lub piston actuator tuaj yeem siv tag nrho cov cua qhov siab, qhov loj ntawm lub actuator yog me dua li cov yeeb yaj kiab, qhov thrust yog ntau dua, O-ring nyob rau hauv lub piston yog ntau txhim khu kev qha, yog li nws yuav yuav siv ntau thiab ntau dua.
10. Vim li cas kev xaiv thiaj tseem ceeb dua kev suav?
Kev suav thiab xaiv piv, kev xaiv yog qhov tseem ceeb dua, ntau qhov nyuaj. Vim hais tias qhov kev suav tsuas yog ib qho yooj yim kev xam cov mis, nws tsis yog nyob ntawm qhov tseeb ntawm cov mis nws tus kheej, tab sis nyob ntawm qhov tseeb ntawm cov txheej txheem muab. Kev xaiv muaj cov ntsiab lus ntau dua, tsis muaj kev saib xyuas me ntsis, yuav ua rau kev xaiv tsis raug, tsis yog tsuas yog ua rau cov neeg siv khoom pov tseg, cov khoom siv, kev siv nyiaj txiag, thiab kev siv cov txiaj ntsig tsis zoo, coj ntau yam teeb meem siv, xws li kev ntseeg siab. , lub neej, kev ua haujlwm zoo, thiab lwm yam.
Daim ntawv thov Scope thiab cov kev cai ntawm lub hwj chim chaw nres tsheb li qub (II) Cov ntaub ntawv siv rau li qub yuav tsum muaj cov ntaub ntawv pov thawj tsim nyog los yog cov ntaub ntawv pov thawj: hlau cov ntaub ntawv yuav tsum tau cim nrog steel tooj, cub tawg tooj thiab batch tooj, thiab muaj tshuaj muaj pes tsawg leeg thiab mechanical zog daim ntawv pov thawj. Thaum cov ntaub ntawv pov thawj ntawm cov khoom siv kuaj pom tau yog ib qho piv txwv ntawm qhov ntsuas kev ua haujlwm tsis zoo, yuav tsum tau siv ob npaug ntawm cov qauv kev sib tham thib ob, yog tias tseem muaj, cov khoom siv no yuav tsum tau kho cua sov dua, ua ntej thib ob - ib puag ncig kev kuaj xyuas xws li kev kho cua sov dua tus naj npawb ntawm tsis pub ntau tshaj ob zaug (tsis suav nrog tus naj npawb ntawm tempering), * * * kev xam phaj thib ob yog tias tseem muaj cov qauv, Cov khoom siv batch no siv tsis tau.
Kev sib txuas sab sauv: Daim ntawv thov ntau yam thiab cov kev xav tau ntawm cov chaw nres tsheb fais fab (1)
7 Kev tshuaj xyuas thiab kuaj
7.1 Kev tshuaj xyuas cov khoom
7.1.1 Cov ntaub ntawv siv rau li qub yuav tsum muaj cov ntaub ntawv pov thawj tsim nyog lossis cov ntawv pov thawj cuam tshuam: cov ntaub ntawv hlau yuav tsum raug cim nrog tus lej hlau, tus lej ntawm lub tshuab hluav taws xob thiab tus lej batch, thiab yuav tsum muaj daim ntawv pov thawj tshuaj muaj pes tsawg leeg thiab cov khoom siv tshuab.
7.1.2 Cov ntaub ntawv ntawm cov kabmob yuav tsum tau kuaj ua ntej khaws cia. Cov tshuaj muaj pes tsawg leeg yuav tsum tau coj mus kuaj raws li lub qhov cub melting, thiab cov khoom siv kho tshuab yuav tsum tau kuaj raws li kev kho cua sov. Cov txiaj ntsig kev xeem yuav tsum ua raws li cov kev cai ntawm cov khoom siv sib xws.
7.1.3 thaum kaw cov khoom ntawm cov ntaub ntawv soj ntsuam cov txiaj ntsig yog ib qho piv txwv ntawm kev ntsuas kev ua haujlwm tsis zoo, yuav tsum tau siv ob npaug ntawm cov qauv kev sib tham zaum ob, yog tias tseem muaj, cov khoom siv no yuav tsum tau kho cua sov dua, ua ntej. cov kev kuaj thib ob xws li kev kho cua sov dua tus naj npawb ntawm tsis pub ntau tshaj ob zaug (tsis suav nrog tus naj npawb ntawm tempering), * * * kev xam phaj thib ob yog tias tseem muaj cov qauv, Cov khoom siv batch no siv tsis tau. Thaum cov tshuaj muaj pes tsawg leeg Performance index ntawm cov qauv tsis tsim nyog tab sis cov cuab yeej cuab tam Performance index ntawm cov qauv yog tsim nyog nyob rau hauv cov sampling soj ntsuam cov txiaj ntsig, cov kev ntsuas pov tseg yuav tsum txiav txim siab raws li qhov xwm txheej tshwj xeeb lossis cov kev cai ntawm daim ntawv cog lus yuav khoom.
7.2 Kev soj ntsuam zoo
7.2.1 Qhov zoo ntawm valve casting steel qhov chaw yuav tsum ua raws li JB / T 7927-1999.
7.2.2 Qhov ntev ntev ntawm cov casting yuav tsum ua raws li cov kev cai ntawm GB / T 6414-1999, tab sis cov phab ntsa thickness ntawm cov bearings ntawm cov casting yuav tsum tsis txhob muaj qhov tsis zoo sib txawv: lub casting riser yuav tsum raug tshem tawm raws li cov roj tau teev tseg. txheej txheem txiav, thiab qhov seem qhov siab tom qab tshem tawm yuav tsum tsis pub tshaj cov kev cai hauv Table 1.
Table 1 Residual siab ntawm cam khwb cia hlau tom qab casting riser tshem tawm Unit mm
7.2.3 Lub pouring riser yuav smoothed los ntawm mechanical machining. Thaum nws nyob ntawm qhov kev sib tshuam ntawm cov voj voog arcs ntawm txoj haujlwm ncig, nws tuaj yeem polished los ntawm kev sib tsoo log thiab hloov pauv nrog lub cev nto. Tom qab tshem tawm cov casting riser, succulent thiab core xuab zeb, kev kho cua sov yuav tsum tau ua raws li cov txheej txheem. Tom qab kev kho cua sov, xuab zeb blasting yuav tsum tau ua kom tshem tawm cov tawv nqaij oxidized, nplaum xuab zeb thiab burr.
7.2.4 Inlays (txias hlau, kev txhawb nqa tseem ceeb, thiab lwm yam) tsis raug tso cai nyob rau hauv cam khwb cia hlau bearing qhov chaw.
7.2.5 Lub vuam zawj ntawm lub valve lub cev, vuam txoj hauj lwm ntawm lub rooj zaum valve, qhov chaw sib cuag ntawm lub valve lub cev thiab lub nplhaib dawb foob, thiab txoj hauj lwm txuas nrog cov ntsia hlau xov nto ntawm lub valve lub cev tsis raug tso cai. ua txhaum.
7.2.6 Steel castings yuav tsum tsis muaj qhov tsis xws luag xws li qhov pores, qhov shrinkage, shrinkage porosity, xuab zeb thiab tawg.
7.2.7 Sab nrauv ntawm cov forgings tsis pub muaj cov kab nrib pleb, folds, forging qhov txhab, cov cim, slag suav nrog thiab lwm yam tsis xws luag. Rau qhov chaw ua tiav, xws li cov teeb meem saum toj no tab sis tsis raug tshem tawm tag nrho tom qab ua tiav, tsuas yog tom qab kev pom zoo los ntawm lub tuam tsev technical, nws raug tso cai siv.
7.3 Ray Detection
7.3.1 Kev Tshawb Fawb
7.3.1.1 Ray tshuaj xyuas yuav tsum tau ua nyob rau hauv lub cev zawj ntawm steel castings welded rau pipelines raws li ib yam ntawm cov nram qab no tej yam kev mob. Qhov ntau ntawm kev nkag mus yog 1.5T ~ 50mm los ntawm lub ntsej muag kawg ntawm qhov zawj, thiab ob qhov tseem ceeb yog me me, raws li qhia hauv FIG. 1
A) Cov kav dej uas muaj lub taub sab nraud ntau dua 426mm (dej yeeb nkab ntau dua 273mm) thiab phab ntsa thickness ntau dua 20mm;
B) Cov kav dej nrog phab ntsa thickness ntau dua 40mm (dej yeeb nkab ntau dua 30mm) thiab sab nraud txoj kab uas hla ntau dua 159mm.
1 - lub cev; 2 - cev.
DW - sab nraud ntawm cov yeeb nkab; T - phab ntsa thickness ntawm cov yeeb nkab txuas nrog valve.
FIG. 1 Ntau qhov kev nkag mus
7.3.1.2 Butt weld ntawm lub valve.
7.3.1.3 Kho qhov chaw yuav tsum tau soj ntsuam los ntawm rays tom qab vuam.
7.3.2 Kev tshawb pom lub sijhawm, txheej txheem thiab kev lees paub
7.3.2.1 Lub teeb pom kev zoo ntawm qhov zawj feem ntau yog ua ntej ua qhov zawj.
7.3.2.2 Txoj kev kuaj X-ray ntawm qhov zawj valve thiab kho vuam ib feem ntawm cov cam khwb cia hlau yuav tsum ua raws li cov kev cai ntawm Qib A hauv GB / T 5677-1985. Valve pob tw welds yuav tsum tau radiographed raws li GB / T 3323-1987 Class AB.
7.3.2.3 Valve groove thiab kho vuam qhov chaw ntawm cam khwb cia hlau qhov chaw yuav tsum raug soj ntsuam raws li GB/T 5677-1985 thiab tsim nyog nyob rau hauv lub thib peb theem. Valve pob tw welds yuav tsum raug soj ntsuam raws li GB / T 3323-1987, Qib 2 tsim nyog.
7.4 Sib nqus particle lossis permeation detection
7.4.1 Kev txheeb xyuas qhov chaw
7.4.1.1 Parting nto, casting riser, kev nyuaj siab concentration, kev sib tshuam ntawm txawv qhov chaw thiab qhov chaw nrog tsis ntseeg ntawm zoo ntawm alloy steel valve lub cev.
7.4.1.2 Groove nto ntawm alloy steel cam khwb cia steel valve lub cev.
7.4.1.3 Fillet weld ntawm cov kabmob ntawm lub valve.
7.4.1.4 Qhov chaw ntawm lub plhaub thiab lwm qhov chaw uas xav tau cov hmoov sib nqus los yog kev tshuaj ntsuam xyuas tom qab vuam.
7.4.1.5 Surfacing sealing ntsej muag ntawm chav valve nrog nominal siab PN≥MPa los yog ua hauj lwm kub T ≥450 ℃. Tus naj npawb ntawm cov qauv kuaj nyob rau hauv txhua batch ntawm li qub yog:
A) Rau DN≥50mm, nws yuav tsum yog 100% ntawm tag nrho cov li qub hauv cov khoom no
B) DN 7.4.2 Lub sijhawm xeem, qauv thiab kev lees paub
7.4.2.1 Rau qhov yuav tsum tau machining, sib nqus particle los yog nkag mus soj ntsuam yuav tsum tau ua tom qab lub kawg machining.
7.4.2.2 Magnetic particle detection method yuav tsum ua raws li cov kev cai ntawm GB/T 9444-1988. Txoj kev xeem nkag mus yuav tsum ua raws li cov kev cai ntawm GB / T 9443-1988.
7.4.2.3 Cov khoom uas yuav tsum tau sib nqus hmoov los yog nkag mus rau hauv kev ntsuam xyuas thiab sealing nto ntawm lub valve yuav tsum tau soj ntsuam thiab txais raws li cov qauv sib xws tau teev tseg hauv 7.4.2.2 ntawm tus qauv no, thiab qib peb yuav tsum tsim nyog.
7.5 Kev sib dhos thiab kev tshuaj xyuas kev ua haujlwm
7.5.1 Txhua qhov chaw ntawm lub valve yuav tsum raug tshuaj xyuas los ntawm lub tuam tsev tshuaj xyuas zoo ua ntej sib dhos, thiab cov khoom tsis tsim nyog yuav tsum tsis txhob sib dhos. Alloy steel qhov chaw yuav tsum yog 100% spectrally kuaj thiab cim kom paub tseeb tias lawv tsis totaub nrog rau lwm yam khoom.
7.5.2 Lub sealing nto yuav tsum tau lav kom muaj hardness txaus raws li tus qauv kos duab los yog saib Daim Ntawv Ntxiv D. Lub sealing nto tom qab sib tsoo tsis pub muaj cov kab nrib pleb, kev nyuaj siab, qhov pores, me ntsis, khawb, nicks thiab lwm yam tsis xws luag. Lub sealing nto yuav tsum xyuas kom meej tias qhov radial anastomosis tsis tsawg dua 80%