Kawirikawiri, ma valve ogulitsa mafakitale sayesedwa kuyesedwa kwa mphamvu pamene akugwiritsidwa ntchito, koma thupi la valve ndi chivundikiro cha valve pambuyo pokonza kapena chivundikiro cha valve ndi chivundikiro cha valavu ndi kuwonongeka kwa dzimbiri ziyenera kuyesedwa mphamvu. Kwa ma valve otetezera, kupanikizika kwa seti ndi kuthamanga kwa mpando wobwerera ndi mayesero ena ayenera kutsata zomwe akupereka malangizo ndi malamulo oyenera. Valavu iyenera kuyesedwa ku mphamvu ndi kusindikiza pambuyo poika. 20% ya ma valve otsika kwambiri amayesedwa mwachisawawa, ndipo ngati ali oyenerera, ayenera kuyang'aniridwa 100%; ma valve apakati ndi apamwamba ayenera kuyang'aniridwa 100%. Njira zomwe zimagwiritsidwa ntchito poyesa kuthamanga kwa ma valve ndi madzi, mafuta, mpweya, nthunzi, nayitrogeni, ndi zina zotero. Njira zoyezera kuthamanga kwa ma valve osiyanasiyana a mafakitale kuphatikizapo ma valve a pneumatic ndi awa:

1. Njira yoyesera kuthamanga kwa ma valve a mpira

Mayeso amphamvu a mavavu a mpira wa pneumatic ayenera kuchitidwa ndi mpira wotseguka.

① Mayeso otsekera ma valve oyandama: ikani valavu pamalo otseguka, yambitsani njira yoyesera kumapeto kwina, ndikutseka mbali inayo; tembenuzirani mpirawo kangapo, tsegulani mapeto otsekedwa pamene valavu ili mu malo otsekedwa, ndipo yang'anani ntchito yosindikizira ya kunyamula ndi gasket nthawi yomweyo. Pasakhale kutayikira. Kenako yambitsani njira yoyesera kuchokera kumapeto ena ndikubwereza mayeso omwe ali pamwambapa.

②Mayeso osindikizira a valve: Musanayambe kuyesedwa, tembenuzani mpirawo kangapo popanda katundu, valve yokhazikika ya mpira imakhala yotsekedwa, ndipo sing'anga yoyesera imayambitsidwa kuchokera kumapeto mpaka mtengo wotchulidwa; gwiritsani ntchito chopimitsira choyezera kuti muwone momwe kusindikizira kwa malo olowera, ndipo gwiritsani ntchito choyezera champhamvu cholondola cha 0,5 mpaka 1 mulingo ndi kuchuluka kwa 1.5 nthawi yoyeserera. Mkati mwa nthawi yotchulidwa, ngati palibe kutsika kwapang'onopang'ono, ndikoyenerera; kenako yambitsani mayeso oyambira kumapeto ena ndikubwereza mayeso omwe ali pamwambapa. Ndiye, valavu ili mu theka lotseguka, mapeto onse atsekedwa, mkati mwa mkati mwadzaza ndi sing'anga, ndipo kulongedza ndi gasket kumafufuzidwa pansi pa mayesero. Sipayenera kukhala kutayikira.

③Mavavu ampira anjira zitatu ayenera kuyesedwa kuti asindikize pamalo osiyanasiyana.

2. Pressure test njira ya cheque valve

Mayesero a valve cheke: Mzere wa valavu ya valve ya valavu yokwezera ili pa malo osakanikirana ndi opingasa; mbali ya tchanelo ndi axis ya valavu disc ya swing check valve ali pamalo pafupifupi ofanana ndi mzere wopingasa.

Pakuyesa mphamvu, sing'anga yoyesera imayambitsidwa kuchokera kumapeto mpaka kumtengo womwe watchulidwa, ndipo mapeto ena amatsekedwa. Ndikoyenera kuwona kuti palibe kutayikira mu thupi la valve ndi chivundikiro cha valve.

Mayeso osindikizira amayambitsa njira yoyesera kuchokera kumapeto, ndikuyang'ana malo osindikizira pamapeto pake. Kunyamula ndi gasket ndi oyenerera ngati palibe kutayikira.

3. Njira yoyezera kupanikizika kwa valve yochepetsera kuthamanga

① Mayeso amphamvu a valve yochepetsera mphamvu nthawi zambiri amasonkhanitsidwa pambuyo pa mayeso amodzi, ndipo amatha kuyesedwa pambuyo pa msonkhano. Kutalika kwa mayeso a mphamvu: 1min ya DN<50mm; kuposa 2min kwa DN65 ~ 150mm; kuposa 3mins kwa DN> 150mm. Pambuyo pa mvuvu ndi msonkhano ndi welded, kuyesa mphamvu ikuchitika ndi mpweya pa 1.5 nthawi pazipita kuthamanga pambuyo valavu kuchepetsa kuthamanga.

② Kuyesa kusindikiza kumachitika molingana ndi sing'anga yeniyeni yogwirira ntchito. Poyesa ndi mpweya kapena madzi, mayeserowa amachitika pa 1.1 nthawi yamphamvu mwadzina; poyezetsa ndi nthunzi, kuyesedwa kumachitika pamtunda wothamanga kwambiri wololedwa pa kutentha kwa ntchito. Kusiyana pakati pa kukakamiza kolowera ndi kutulutsa kotulutsa kumafunika kukhala osachepera 0.2MPa. Njira yoyesera ndi: pambuyo pa kulowetsedwa kolowera, sinthani pang'onopang'ono kusintha kwa valavu kuti mpweya wotuluka usinthe mosasunthika komanso mosalekeza mkati mwamtundu wapamwamba komanso wocheperako, ndipo sipayenera kukhala kuyimirira kapena kutsekereza. Kwa ma valve ochepetsa kuthamanga kwa nthunzi, pamene mphamvu yolowera isinthidwa, valavu yotseka kumbuyo kwa valve imatsekedwa, ndipo kuthamanga kwa kutuluka ndipamwamba kwambiri komanso mtengo wotsika kwambiri. Pakadutsa mphindi 2, kukwera kwa mphamvu yake yotuluka kuyenera kukwaniritsa zofunikira za Table 4.176-22. Panthawi imodzimodziyo, kuchuluka kwa payipi kumbuyo kwa valve kumakwaniritsa zofunikira za Table 4.18 kwa oyenerera; kwa ma valve ochepetsa kuthamanga kwa madzi ndi mpweya, mphamvu yolowera ikasinthidwa ndipo kutulutsa kotulutsa ndi zero, valavu yochepetsera kuthamanga imatsekedwa kuti iyesedwe kusindikiza, ndipo palibe kutayikira mkati mwa mphindi ziwiri ndikoyenera.

4. Pressure test njira ya butterfly valve

Kuyeza mphamvu kwa vavu ya butterfly ndi yofanana ndi ya valve yoyimitsa. Mayeso osindikizira a gulugufe ayenera kuwonetsa sing'anga yoyesera kuchokera kumapeto kwapakati, mbale yagulugufe iyenera kutsegulidwa, mapeto enawo atsekedwe, ndipo kupanikizika kuyenera kubayidwa pamtengo wotchulidwa; mutayang'ana kuti palibe kutayikira mu kulongedza ndi mbali zina zosindikizira, tsekani mbale yagulugufe, tsegulani mbali inayo, ndipo fufuzani kuti palibe kutayikira mu gawo losindikizira la gulugufe kwa oyenerera. Vavu yagulugufe yomwe imagwiritsidwa ntchito powongolera kayendedwe kabwino siyenera kuyesedwa kuti isindikize.

5. Njira yoyesera ya plug valve

① Valovu ya pulagi ikayesedwa kuti ikhale yamphamvu, sing'angayo imayambitsidwa kuchokera kumapeto, ndime yotsalayo imatsekedwa, ndipo pulagi imazunguliridwa pamalo otseguka kuti ayesedwe. Thupi la valve ndiloyenera ngati palibe kutayikira komwe kumapezeka.

② Pakuyesa kusindikiza, valavu ya pulagi yowongoka iyenera kusunga kupanikizika kwapang'onopang'ono kofanana ndi komwe kuli mundimeyi, kutembenuza pulagi kumalo otsekedwa, kuyang'ana kumapeto kwina, ndikutembenuza pulagi 180 ° kubwereza. pamwamba mayeso; valavu yamapulagi yanjira zitatu kapena zinayi iyenera kusunga kupanikizika kwapabowo kofanana ndi komwe kuli kumapeto kwa ndimeyi, kutembenuza pulagi kumalo otsekedwa, kuwonetsa kupanikizika kuchokera kumapeto kwa ngodya yakumanja, ndikuyang'ana kuchokera pakona. zina zimatha nthawi yomweyo.

Musanayese valavu ya pulagi, amaloledwa kuyika mafuta osanjikiza opaka mafuta osaya acidic pamtunda wosindikiza. Ngati palibe kutayikira kapena kukulitsa madontho amadzi omwe amapezeka mkati mwa nthawi yotchulidwa, ndiye woyenera. Nthawi yoyesera ya valavu ya pulagi ikhoza kukhala yayifupi, nthawi zambiri imatchulidwa ngati 1 mpaka 3 mphindi molingana ndi m'mimba mwake.

Vavu ya pulagi ya gasi iyenera kuyesedwa ngati kulimba kwa mpweya kumawirikiza 1.25 kukakamiza kugwira ntchito.

6. Njira yoyezera kupanikizika kwa ma valve a diaphragm Kuyesa mphamvu kwa ma valve a diaphragm ndiko kuwonetsa sing'anga kuchokera kumapeto kulikonse, kutsegula diski ya valve, ndi kutseka mapeto ena. Pambuyo pa kukakamizidwa kwa mayeso kukwera pamtengo wotchulidwa, fufuzani ngati palibe kutayikira mu thupi la valve ndi chivundikiro cha valve. Kenako chepetsani kukakamiza kwa mayeso osindikizira, kutseka chimbale cha valve, tsegulani mbali ina kuti muwunikenso, ndikudutsa ngati palibe kutayikira.

7. Njira yoyezera kupanikizika kwa ma valve oyimitsa ndi ma throttle valves

Kuti muyese mphamvu ya ma valve oyimitsa ndi ma valve othamanga, ma valve osonkhanitsidwa nthawi zambiri amaikidwa muzitsulo zoyesa kuthamanga, valavu ya valve imatsegulidwa, sing'anga imayikidwa pamtengo womwe watchulidwa, ndipo thupi la valve ndi chivundikiro cha valavu zimafufuzidwa chifukwa cha thukuta komanso kutayikira. Mayeso a mphamvu amathanso kuchitidwa pa chidutswa chimodzi. Kuyesa kusindikiza kumangochitika pa ma valve oyimitsa. Pakuyesedwa, tsinde la valve ya valve yoyimitsa ili pamtunda, diski ya valve imatsegulidwa, ndipo sing'anga imayambitsidwa kuchokera kumapeto kwa diski ya valve kupita ku mtengo wotchulidwa, ndipo kunyamula ndi gasket kumafufuzidwa; Pambuyo poyesa mayeso, valavu ya valve imatsekedwa ndipo mapeto ena amatsegulidwa kuti awone ngati akutuluka. Ngati mayesero onse a valve ndi kusindikiza akuyenera kuchitidwa, kuyesa mphamvu kungathe kuchitidwa poyamba, ndiyeno kupanikizika kungathe kuchepetsedwa ku mtengo wodziwika wa kuyesa kusindikiza, ndipo kulongedza ndi gasket zikhoza kufufuzidwa; ndiye chimbale cha valve chikhoza kutsekedwa ndipo mapeto amatha kutsegulidwa kuti awone ngati malo osindikizira akutuluka.