Vavu isanakhazikitsidwe, kuyesa mphamvu ya valve ndi kuyesa kusindikiza valavu ziyenera kuchitidwa pa benchi yoyesera ya valve hydraulic test. 20% ya ma valve otsika kwambiri ayenera kuyang'aniridwa mwachisawawa, ndipo 100% ayenera kuyang'aniridwa ngati ali oyenerera; 100% ya ma valve apakati ndi apamwamba ayenera kuyang'aniridwa. Njira zomwe zimagwiritsidwa ntchito poyesa kuthamanga kwa ma valve ndi madzi, mafuta, mpweya, nthunzi, nayitrogeni, ndi zina zotero. Njira zoyezera kuthamanga kwa ma valve a mafakitale kuphatikizapo ma valve a pneumatic ndi awa:
Njira yoyesera ya butterfly valve pressure
Mayeso amphamvu a vavu ya butterfly ya pneumatic ndi yofanana ndi ya valavu yapadziko lonse lapansi. Pakuyesa kusindikiza kwa valve ya butterfly, sing'anga yoyesera iyenera kuyambitsidwa kuchokera kumapeto kwa sing'anga, mbale yagulugufe iyenera kutsegulidwa, mapeto enawo atsekedwe, ndipo kuthamanga kwa jekeseni kuyenera kufika pamtengo wotchulidwa; mutayang'ana kuti palibe kutayikira pa kulongedza ndi zisindikizo zina, tsekani mbale yagulugufe, tsegulani mbali inayo, ndikuyang'ana valve ya butterfly. Palibe kutayikira pa chisindikizo cha mbale ndikoyenera. Vavu yagulugufe yomwe imagwiritsidwa ntchito powongolera kuyenda sikungayesedwe kuti isindikize.
Pressure test njira ya cheque valve
Yang'anani mawonekedwe a mayeso a valve: olamulira a valavu yokweza valavu ali pamalo omwe ali molunjika kumtunda; olamulira a swing check valve channel ndi disc axis ali pamalo pafupifupi ofanana ndi mzere wopingasa.
Pakuyesa mphamvu, sing'anga yoyesera imayambitsidwa kuchokera kulowera kupita ku mtengo wotchulidwa, ndipo mapeto ena amatsekedwa, ndipo ali oyenerera kuona kuti thupi la valve ndi chivundikiro cha valve sichikutuluka.
Pakuyesa kusindikiza, sing'anga yoyesera imayambitsidwa kuchokera kumapeto, ndipo malo osindikizira amawunikidwa kumapeto kwa cholowera, ndipo palibe kutayikira pakulongedza ndi gasket ndikoyenera.
Njira yoyezera kuthamanga kwa valve yachipata
Kuyesa kwamphamvu kwa valve yachipata ndi yofanana ndi ya valve ya globe. Pali njira ziwiri zoyesera zolimba za valve pachipata.
①Tsegulani chipata kuti chiwongolero cha valve chifike pamtengo wotchulidwa; ndiye kutseka chipata, tulutsani valavu yachipata nthawi yomweyo, fufuzani ngati pali kutayikira pazisindikizo kumbali zonse ziwiri za chipata, kapena lowetsani mwachindunji njira yoyesera mu pulagi pa chivundikiro cha valve ku mtengo wotchulidwa, fufuzani zisindikizo pa zonse ziwiri. mbali za chipata. Njira yomwe ili pamwambayi imatchedwa kuyesa kwapakati papakati. Njirayi sayenera kugwiritsidwa ntchito posindikiza mayeso pa mavavu a pachipata okhala ndi m'mimba mwake mwadzina pansi pa DN32mm.
②Njira ina ndikutsegula chipata kuti chiwongolero cha kuyesa kwa valve kukwera pamtengo wotchulidwa; kenako tsekani chipata, tsegulani mbali imodzi ya mbale yakhungu, ndipo muwone ngati malo osindikizirawo akutuluka. Kenako bwererani ndikubwereza mayeso omwe ali pamwambawa mpaka atayenerera.
Kuyesedwa kolimba kwa kulongedza ndi gasket ya valve ya pneumatic gate iyenera kuchitidwa musanayese kulimba kwa chipata.
Pressure test njira ya kuthamanga kuchepetsa vavu
①Kuyesa kwamphamvu kwa valve yochepetsera kupanikizika nthawi zambiri kumasonkhanitsidwa pambuyo pa kuyesedwa kwa chidutswa chimodzi, ndipo kungathenso kuyesedwa pambuyo pa msonkhano. Kutalika kwa kuyesa mphamvu: 1min kwa DN<50mm; kuposa 2mins kwa DN65～150 mm; kuposa 3mins kwa DN> 150mm.
Pambuyo mvuvu ndi zigawo zake welded, ntchito 1.5 nthawi pazipita kuthamanga kwa valavu kuchepetsa kuthamanga, ndi kuyesa mphamvu ndi mpweya.
②Kuyesa kwa mpweya kudzachitika molingana ndi sing'anga yeniyeni yogwirira ntchito. Mukayesa ndi mpweya kapena madzi, yesani nthawi 1.1 kukakamiza mwadzina; poyesa ndi nthunzi, gwiritsani ntchito kupanikizika kwakukulu komwe kumaloledwa pansi pa kutentha kwa ntchito. Kusiyana pakati pa kukakamiza kolowera ndi kutulutsa kotulutsa kumafunika kukhala osachepera 0.2MPa. Njira yoyesera ndi: pambuyo pa kulowetsedwa kwa inlet kusinthidwa, pang'onopang'ono sinthani zitsulo zosinthika za valve, kotero kuti kuthamanga kwa kutuluka kungasinthe mosalekeza komanso mosalekeza mkati mwa chiwerengero chapamwamba komanso chochepa, popanda kuyimirira kapena kupanikizana. Kwa valavu yochepetsera mphamvu ya nthunzi, pamene kulowetsedwa kumasinthidwa, valavu imatsekedwa pambuyo pa kutsekedwa kwa valve, ndipo kuthamanga kwa kutuluka ndipamwamba kwambiri komanso kotsika kwambiri. Mkati mwa 2min, kuwonjezeka kwa kuthamanga kwa kutuluka kuyenera kukwaniritsa zofunikira mu Table 4.176-22. Panthawi imodzimodziyo, payipi kumbuyo kwa valve iyenera kukhala Voliyumu ikugwirizana ndi zofunikira mu Table 4.18 kuti ikhale yoyenerera; kwa ma valve ochepetsa kuthamanga kwa madzi ndi mpweya, pamene kulowetsedwa kwa cholowera kumayikidwa ndipo kutulutsa kotulutsa ndi zero, valavu yochepetsera mphamvu imatsekedwa kuti iyesedwe zolimba, ndipo palibe kutuluka mkati mwa maminiti a 2 ndikoyenera.
Njira yoyezera kupanikizika kwa valavu yapadziko lonse lapansi ndi ma throttle valve
Kuti muyese mphamvu ya valve ya globe ndi valve throttle valve, valavu yosonkhanitsidwa nthawi zambiri imayikidwa muzitsulo zoyesa kuthamanga, valavu ya valve imatsegulidwa, sing'anga imayikidwa pamtengo womwe watchulidwa, ndipo thupi la valve ndi chivundikiro cha valve chimafufuzidwa ndi thukuta ndi valavu. kutayikira. Mayeso a mphamvu amathanso kuchitidwa pa chidutswa chimodzi. Mayeso olimba ndi a valve yotseka yokha. Pakuyesedwa, tsinde la valve ya valve ya globe ili pamtunda, diski ya valve imatsegulidwa, sing'anga imayambitsidwa kuchokera kumapeto kwa diski ya valve kupita ku mtengo wotchulidwa, ndipo kulongedza ndi gasket kumafufuzidwa; Pambuyo poyesa mayeso, valavu ya valve imatsekedwa, ndipo mapeto ena amatsegulidwa kuti awone ngati pali kutuluka. Ngati kuyesedwa kwa mphamvu ndi kulimba kwa valve kumayenera kuchitidwa, kuyesa mphamvu kungathe kuchitidwa poyamba, ndiye kuti kupanikizika kumachepetsedwa ku mtengo wodziwika wa kuyesa kolimba, ndipo kulongedza ndi gasket kumafufuzidwa; ndiye chimbale cha valve chimatsekedwa, ndipo mapeto amatsegulidwa kuti awone ngati malo osindikizira akutuluka.
Njira yoyesera kuthamanga kwa valve ya mpira
Kuyesa kwamphamvu kwa valavu ya mpira wa pneumatic kuyenera kuchitika mu gawo lotseguka la valavu ya mpira.
①Kuyesa kusindikiza kwa valve yoyandama: ikani valavu pamalo otseguka, yambitsani njira yoyesera kumapeto kwina, ndikutseka mbali inayo; tembenuzani mpirawo kangapo, tsegulani mapeto otsekedwa pamene valavu ili mu malo otsekedwa, ndipo yang'anani ntchito yosindikiza pa kulongedza ndi gasket nthawi yomweyo. Pasakhale kutayikira. Njira yoyesera imayambitsidwa kuchokera kumapeto ena ndipo mayeso omwe ali pamwambawa amabwerezedwa.
②Kuyesa kusindikiza kwa valve yokhazikika ya mpira: musanayambe kuyesedwa, tembenuzani mpirawo kangapo popanda katundu, valve yokhazikika ya mpira ili mu malo otsekedwa, ndipo sing'anga yoyesera imayambitsidwa kuchokera kumapeto mpaka mtengo wotchulidwa; ntchito yosindikizira ya mapeto oyambirira imafufuzidwa ndi kupima kuthamanga, ndipo kulondola kwa 0 .5 mpaka 1, chiwerengerocho ndi 1.6 nthawi zoyesera. Mkati mwa nthawi yotchulidwa, ngati palibe chodabwitsa cha depressurization, ndichoyenerera; kenako yambitsani mayeso oyambira kumapeto ena, ndikubwereza mayeso omwe ali pamwambapa. Kenako, ikani valavu mu theka lotseguka, kutseka malekezero onse, ndi kudzaza mkati mkati ndi sing'anga. Yang'anani kulongedza ndi gasket pansi pa kukakamizidwa kwa mayeso, ndipo sipayenera kukhala kutayikira.
③Valavu yanjira zitatu iyenera kuyesedwa kuti ikhale yolimba pamalo aliwonse.
Nthawi yotumiza: Mar-02-2022
