YesaniNjirazaMa Valve Osiyanasiyana Pakuwunika kwa Valve
Mwambiri,valavu mafakitaleosasowakuyesa mphamvupa ntchito pamene anakonza valavu thupi ndi chivundikiro kapenazowonongandizowonongekathupi la vavu ndi chivundikiro ziyenera kuchitidwa kuyesa mphamvu.The set pressurekuyesa,kubwezeretsanso kuthamangamayeso ndi mayeso ena a valve otetezeka adzakumana ndichofunikas mu Buku Logwiritsa Ntchito ndi njira zoyenera.Tvalve yake iyenera kuchitidwa kuti iyese mphamvu ndi kusindikiza musanayike.Tma valve otsika amawunikiridwa mwachisawawa 20% koma 100%ngati osayenerera;mavavu apakatikati ndi apamwamba aziwunikiridwa 100%.
1,KupanikizikaNjira YoyeserazaValve ya Mpira
Kuyesa mphamvu kwavalavu ya mpira wa pneumaticzidzachitika patheka lotseguka malowa mpira.
① Kusindikizakuyesa kwazoyandamandivalavu ya mpira:kupanga valavu patheka lotseguka malo, yambitsani njira yoyesera mpaka kumapeto ndi kusindikiza mapeto ena, tembenuzani mpirawo kangapo ndikutsegula mapeto otsekedwa kuti awonedwe pamene valavu ili pafupi.At nthawi yomweyo, yang'anani ntchito yosindikiza pakulongedza ndigasket,ndi izisipadzakhala kutayikira.Inesonyezani njira yoyesera kuchokera kumapeto kwina ndikubwereza mayeso omwe ali pamwambapa.
②Kusindikizakuyesa kwa valve yokhazikika ya mpira: tembenuzani mpirawo mopanda katundu kangapo musanayesedwe, valavu ya mpira yokhazikika ili pafupi nthawi ino, ndipo yambitsani njira yoyesera mpaka mtengo wotchulidwa kuchokera kumapeto kumodzi.Gwiritsani ntchito sikelo yoyezera kuthamanga kuti muwone momwe kusindikizira komwe kumayambira, ndipo kulondola kwake komwe kumagwiritsidwa ntchito ndi 0.5 ~ 1 mulingo ndiosiyanasiyanawa nthawi 1.5 kuposa kuthamanga mayeso.Imayenerera ngati palibe zotulutsa zokakamizamkati mwa nthawi yodziwika.Yambitsani sing'anga yoyeserera kuchokera kumalekezero ena ndikubwereza mayeso pamwambapa, kenako pangani valavu pamalo otseguka, kutseka malekezero onse awiri, lembani sing'angayo kuti mutseke ndikuyang'ana kulongedza ndi gasket povutitsidwa ndi mayeso.palibe kutayikira.
③Kuyesa kusindikiza kudzachitika pa malo aliwonse a valve yanjira zitatu.
2,KupanikizikaNjira Yoyeseraza OnaniVavu
Yesanimkhalidwe wa valavu cheke: ndivalve clack axisof valavu yowunikirandi muyopingasalymalo ofukula, ndi mayendedwe anjira ndivalve clack axisof valavu yoyenderandipafupifupi kufanana ndi mzere wopingasa.
Pakuyesa mphamvu, yambitsani njira yoyesera mpaka mtengo wodziwika kuchokera kumapeto, kutseka kumapeto kwina ndikuyang'ana thupi la vavu ndi chivundikiro, ndizoyenera ngati palibe kutayikira.
Zakuyesa kusindikiza, yambitsani njira yoyesera kuchokera kumapeto, yang'anani malo osindikizira pamapeto olowera, ndipo ali oyenera ngati palibe kutayikira pakulongedza.ndigasket.
3,KupanikizikaNjira YoyeserazaKuchepetsa Vavu
①Pakuyesa mphamvu pakuchepetsa valavu, imasonkhanitsidwa pambuyo poyesedwa gawo limodzi nthawi zambiri koma imatha kuyesedwanso ikatha kusonkhanitsa.Tnthawi ya mayeso a mphamvu:lminzaDN <50mm, yaitali kuposa2 minzaDN65~150 mmndi yaitali kuposa3 minzaDN> 150mm. Pambuyokuwotchereramvuvundi kusonkhana, kuyesa mphamvu ndi mpweya ndi pansi pa 1.5 nthawi zothamanga kwambiri pakuchepetsa valavu ziyenera kuchitika.
②Njira yeniyeni yogwirira ntchito idzagwiritsidwa ntchito poyesa kusindikiza.If mpweya kapena madzi omwe amagwiritsidwa ntchito poyesa, kukakamiza 1.1 nthawi za kukakamiza mwadzina kumagwiritsidwa ntchito poyesa.Wnkhuku kuchititsamayeso a nthunzi, kupanikizika kwakukulu kololedwa kugwira ntchito pansi pa kutentha kwa ntchito kudzagwiritsidwa ntchito, ndipo kusiyana pakati pa kulowetsedwa ndi kutulutsa mpweya kumafunika osati kutsika kuposa0.2MPa. Thenjira yoyesera ndi: mutatha kusintha kukakamiza kolowera, wongoleranikukonza screwwa valavu pang'onopang'ono kuti kutulutsa kuthamanga akhoza sensitively ndimosalekezakusintha pakati pa kuchuluka kwapakati ndi mtengo wocheperako, wopanda kuyimitsa ndi kukanikiza.Tsekanindivalavu ya blockkumbuyo kwa valavu ya nthunzipambuyo kusinthakukakamiza kolowera.Thekukakamiza kotuluka kudzakhala kokwera kwambiri komanso kotsika mtengo ndipo kukwera mtengo mkati mwa 2 min ya kukakamiza kotuluka kudzakwaniritsachofunikamu Gawo 4:176-22.Panthawiyikuchuluka kwa chitoliro kumbuyo kwa valve ali oyenerera ngati akwaniritsa zofunikira mu Table 4.18.LitiKuthamanga kotuluka ndi zero mutatha kusintha kulowetsedwa kwa madzi ndi mpweya wochepetsera valavu, kutseka valavu yochepetsera kuti muyese kusindikiza ndipo imakhala yoyenerera ngati palibe kutuluka mkati mwa 2 min.
4,KupanikizikaNjira YoyeserazaGulugufe Valve
Mphamvukuyesa kwavalavu ya butterfly ya pneumaticndizofanana ndi valve yoyimitsa.Fkapena kusindikiza ntchito mayeso avalavu ya butterfly, yambitsani mayeso a sing'anga kuchokera kumapeto kwa sing'anga yomwe ikuyenda, tsegulanimbale ya butterfly, tsekani mbali ina ndikulowetsani kukakamiza ku mtengo wotchulidwa.Mukatsimikizira kulongedza ndi malo ena osindikizira alibe kutayikira, tsekani mbale yagulugufe, tsegulani mbali ina ndikuwunikakusindikizaa gulugufe mbale, ndi woyenerera ngati palibe kutayikira.Tvalavu yagulugufe yomwe imagwiritsidwa ntchito poyang'anira kuyenda singagwiritsidwe ntchito posindikiza mayeso a magwiridwe antchito.
5,KupanikizikaNjira YoyeserazaPulagi Valve
①Mukayesa mphamvu ya valavu ya pulagi, yambitsani sing'anga kuchokera kumapeto, kutseka njira zina,screwpulagi kuti agwire ntchito yotseguka motsatizana kuti ayesedwe, ndipo thupi la valve ndiloyenera ngati palibe kutayikira komwe kwapezeka.
②Pochita mayeso osindikiza, amolunjikaplug azisungakupanikizikam'mphako wofanana ndi kupanikizika mu njira.Rotate pulagi kuti atseke, yang'anani kuchokera kumapeto kwina, kenako tembenuzani pulagiyo180 °ndi kubwereza mayeso pamwamba.Tvalavu ya pulagi ya njira zitatu kapena zinayi idzasunga kupanikizika kwapang'onopang'ono kofanana ndi kukanikiza kwa mbali imodzi ya njira, kutembenuza pulagi kuti itseke malo motsatizana, kuwonetsa kupanikizika kuchokeraamakona anayimaliza ndi kuyang'ana mapeto ena nthawi yomweyo.
Musanayesedwe, ndikololedwa kugwiritsa ntchito wosanjikiza umodzi wa non-acidwoonda mafutamafuta pa kusindikiza pamwamba pa valavu pulagi, ndipo ndi woyenerera ngati palibe kutayikira ndi anawonjezeradonthozidapezeka mu nthawi yodziwika.Nthawi yoyesera ya valavu ya pulagi ikhoza kukhala yaifupi ndipo ikhoza kukhala 1 ~ 3min yonse molingana ndi m'mimba mwake mwadzina.Tvalavu ya pulagi ya mpweya wa malasha iyenera kuyesedwa ndi kusindikiza kwa mpweya ndi 1.25-fold
6,Pressure Test Njira yaValve ya diaphragm
Kuti muyese mphamvu ya valavu ya diaphragm, yambitsani sing'anga kuchokera kumapeto kulikonse, tsegulani valvekulirandi kutseka mapeto ena, yang'anani thupi la valve ndikuphimba pambuyo pa kukakamizidwa kwa mayeso kukwera ku mtengo wotchulidwa, ndipo ndi woyenera ngati palibe kutayikira.Donjezerani kukakamiza kukakamiza kuyesa kusindikiza, kutseka valavu ndikutsegula mbali ina kuti mufufuze, ndipo ndiyoyenerera ngati palibe kutayikira.
7,Pressure Test Njira yaImani Valve ndiValve yothamanga
Kwa kuyesa mphamvu kwavalavu yoyimitsa ndi valavu yotsekemera, nthawi zambiri ikani valavu yosonkhanitsidwa pazitsulo zoyesera, valavu yotseguka, jekeseni pakati pa mtengo womwe watchulidwa, ndikuwona ngati thupi ndi chivundikirocho zilikutenthandi kuchucha.Single gawo akhoza kuchitidwa kwamphamvumayeso komanso.Tkuyesa kwake kusindikiza ndikungoyimitsa valavu pano.Litikuyezetsa, ndodo ya valve yoyimitsa ili pamtunda, valavu yotseguka, yambitsani sing'anga kuchokera ku mbali imodzi pansi pa valve clack ku mtengo wotchulidwa ndikuyang'ana kulongedza ndi gasket.Ckutaya valavu clack pambuyo woyenerera ndi kutsegula mapeto ena kuti muwone ngati yatayikira.If onsemphamvukuyesa ndi kuyesa kusindikiza kwa valavu kuti ayesedwe, kuyesa mphamvu kukhoza kuchitidwa poyamba, ndiyeno kuchepetsa kupanikizika kwa mtengo wotchulidwa mwa kusindikiza mayeso, fufuzani kulongedza ndi gasket, kutseka valve, ndi kutsegula kumapeto kuti muwone ngati kusindikizapamwambayatayikira.
8,Pressure Test Njira yaChipata cha Chipata
Kuyesa mphamvu kwaGetivalavu ndi yofanana ndi valve stop.Tapa pali njira ziwiri zosindikizira mayeso aGetivalavu.
①Tsegulanimbale pachipatakuti kukakamiza mu valavu kukwera kwa valavu yotchulidwa, kutsekambale pachipatandipo nthawi yomweyo mutulutse valavu yachipata, fufuzani ngati mbali zosindikizira kumbali zonse za mbale yachipata zatayikira, kapena lowetsani mwachindunji sing'anga yoyesera mu malo a pulagi pa chivundikiro cha valve ku mtengo wotchulidwa, ndikuwona kusindikiza kumbali zonse za mbale yachipata.Tadatchula njirayo imatchedwakuyezetsa kuthamanga kwapakatindipo sizoyenera kuyesa kusindikiza kwa valve yachipata yokhala ndi m'mimba mwake mwadzina kutsika kuposaDN32 mm.
②Njira ina ndi: kutsegula mbale pachipata kuti mayeso kuthamanga valavu kukwera kwa mtengo wotchulidwa, ndiyeno kutseka mbale pachipata, lotseguka mbale akhungu pa mbali imodzi kuti muwone ngati kusindikiza pamwamba zinawukhira, ndisinthandondomeko yobwereza mayeso omwe ali pamwambawa mpaka atayenerera.
Mayeso osindikiza onyamula ndi gasket wavalavu ya chipata cha pneumaticzidzachitika chisanachitike mayeso osindikiza pachipata.
9,Pressure Test Method for Safety Valve
①Mayesero amphamvu a valve otetezeka ndi ofanana ndi ma valve ena ndipo madzi amatengedwa kuti ayesedwe.Poyesa gawo lakumunsi la thupi la vavu, yambitsani kuthamanga kuchokera ku choloweraI=inemapeto, ndi kutseka kusindikiza pamwamba.Wnkhuku poyesa kumtunda kwa valavu ndi chivundikiro cha valavu, yambitsani kupanikizika kochokera kunjaElkumaliza, ndi kutseka malekezero ena.It ali oyenerera ngati thupi la valve ndi chivundikiro sichinatayike mkati mwa nthawi yotchulidwa.
②Sing'anga yomwe imagwiritsidwa ntchitokusindikizatest ndiKuyesa kuthamanga nthawi zonsendi:nthunzi yodzazaamagwiritsidwa ntchito ngati sing'anga yoyesera ya valavu yachitetezo cha nthunzi;Mpweya umagwiritsidwa ntchito ngati njira yoyesera ma valve omwe amagwiritsidwa ntchito mkatiammoniakapena gasi wina;madzi amagwiritsidwa ntchito ngati njira yoyesera ma valve omwe amagwiritsidwa ntchito m'madzi ndi zinazosawonongamadzimadzi.Kwa valavu yachitetezo pamalo ena ofunikira,nayitrogeniamagwiritsidwa ntchito ngati test medium monga mwachizolowezi.
Kupanikizika mwadzina kumatengedwa ngati kukakamizidwa kwa mayeso pakuyesa kusindikiza kwanthawi zosachepera kawiri, ndipo kumakhala koyenera ngati palibe kutayikira mkati mwa nthawi yomwe yatchulidwa.TNazi njira ziwiri zoyesera kutayikira: yoyamba ndikusindikiza magawo olumikizirana ndi valavu yachitetezo, kumata pepala lopyapyala pachotuluka E1 flange pogwiritsa ntchitomafuta, ndipo amatayikira ngati pepala woondakuphulikad kapenawoyenererangati pepala woonda sanaterokuphulika. TheNjira yachiwiri ndikumata mbale yopyapyala ya pulasitiki kapena mbale zina kumunsi kwa chotulukapo pogwiritsa ntchitomafuta, jekeseni madzi kuti asindikize valavu ya valve ndikuyiyang'ana, ndipo ndi yoyenera ngati ayikubwebwetammadzi.Thekhazikitsani kupanikizikatest ndikubwezeretsanso kuthamangakuyesa kwa valavu yachitetezo kudzachitika osachepera 3 nthawi, ndipo ndi yoyenerangati akwaniritsa zofunikira.Plembani onani GB/T 12242-1989Njira Zoyeserera Magwiridwe Amagetsi Otetezedwa pakuyesa magwiridwe antchito a valve yotetezeka.
Nthawi yotumiza: Dec-06-2021